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the test of the H160A fingerprint module fingerprint sensor: 0.15 seconds!

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Intelligent terminal fingerprint identification industry analysis report-fingerprint module of Guangzhou Zhongyi Technology Co., Ltd

First, the biometric collection method:

With the advent of emerging technologies such as mobile internet and Internet of Things, traditional methods of identifying and identifying people have failed to meet the needs of social development. Through computer and optical, acoustic, biosensor and biostatistics and other high-tech means, the use of the body's inherent physiological characteristics (such as fingerprints, face, iris, etc.) and behavioral characteristics (such as handwriting, sound, gait, etc.) ) To identify individuals and become the general trend.

At present, the main biometric methods are: fingerprint recognition, palmprint recognition, iris recognition, facial recognition, DNA recognition, and behavior recognition.

At present, the identification method is the easiest, most practical, and most accurate. The best development is the “fingerprint recognition” method. Globally, fingerprint recognition accounts for nearly 60% of the global market for biometrics. More than a thousand fingerprinting companies produce hundreds of fingerprint identification products, while other biometrics manufacturers are less than one-tenth. .

The most common ones we can see are fingerprint punching, fingerprint access control, etc. However, the arrival of mobile Internet, including information security, mobile payment and many other requirements biometric authentication, fingerprint recognition has become a mainstream smart set-up manufacturers and consumers can quickly accept The way. On the eve of the outbreak of mobile payment, fingerprint recognition based on smart terminals will also usher in the big hair.

Second, the basic principles of fingerprint identification and acquisition technology:

A typical fingerprint identification system should include: fingerprint recognition sensor + feature extraction / matching module + feature template library + application software. The matching of the fingerprint can be divided into two steps. First, the feature of the fingerprint to be verified is extracted, and then the similarity is compared with the template fingerprint in the fingerprint template library to determine whether the two fingerprint images are from the same finger.

We can see that the fingerprint identification core is accurate and efficient in collecting fingerprint analysis. The development of fingerprint recognition acquisition technology is roughly divided into three ways: optical recognition, capacitive sensors, bio-RF

Optical recognition

Optical recognition is an earlier fingerprint recognition technology. The light emitted by the optical transmitting device is reflected on the finger and then reflected back to the machine to obtain data, and the database is compared to see if it is consistent. Optical recognition can only reach the epidermis of the skin, not the dermis, and it is greatly affected by the cleanness of the finger surface.

2. Capacitive sensor

Capacitive sensor identification is the use of two capacitors installed at a certain interval. Using the bump of the fingerprint, the current of the two capacitors is turned on or off when the finger slides over the fingerprint detecting instrument to detect the fingerprint data. The capacitive sensor's clean requirements for the finger are still relatively high, and the sensor surface is made of silicon material, which is relatively easy to damage.

3. Bio-RF

The RF sensor emits a small amount of RF signal through the sensor, and penetrates the skin layer of the finger to obtain the texture of the inner layer to obtain information. This method requires less cleanliness of the fingers.

RF is a relatively new technology solution, and RF is also a type of capacitor, but it is limited by patent issues. RF is the future direction.

Third, fingerprint identification collection method:

No matter what acquisition technology is used, there are two types of input methods from the user's point of view: push type and slide type.

Sliding

By swiping your finger across the sensor, the system can get the fingerprint of the entire finger. When the finger is pressed up, the complete image cannot be acquired at one time. During the collection, the finger needs to be swept over the collection surface, and each fingerprint image collected by the finger is snapshotted, and the snapshots are stitched together to form a complete fingerprint image.

Sliding sensor, sliding from top to bottom, then complete fingerprint stitching

The advantage of sliding type is low cost and easy integration. It can collect large-area images and apply traditional feature point algorithm. However, the disadvantage is that customers need to have a consistent standard motion to collect images, and the experience is relatively poor. Too successful.

2. Push type

Place your finger flat on the device to get a fingerprint image. In general, in order to obtain the fingerprint of the entire finger, it is necessary to use a sensor larger than the finger, and the entire finger is simultaneously pressed on the sensor.

The advantage of the push type is that the customer experience is good, and the image can be collected with only one press, matching the customer's operating habits in the mobile application without educating the customer. The disadvantages are: high cost, difficulty in integration, relatively small image area at one time, and insufficient feature points, which need to be identified by a complex image matching algorithm.

Obviously, from the user's point of view, the press type is the simplest and most convenient. More and more mobile devices will adopt push-type fingerprint recognition solutions in the future.

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Smartphone fingerprint recognition big decryption-fingerprint module of Guangzhou Zhongyi Technology Co., Ltd

At present, the main unlocking methods of the fingerprint recognition module applied to the mobile phone include front pressing, back pressing, front sliding and back sliding. The front side mainly adopts a small chip area product, which is convenient to be integrated into the HOME key; The reason for the back is mainly due to the large chip area or the limited structural design.

The fingerprint recognition module is mainly composed of a chip, a protection layer, a switch component, a soft board, a motherboard substrate, etc. The fingerprint recognition module adopts different component combinations, and the module design also has different ways.

One of them is a single-chip mode that integrates a chip and a sensor. The advantage of this mode is that it can be produced using an older chip production line. The module structure is the simplest, and the module cost and assembly cost are low. The software and hardware are simultaneously solidified in a single chip, and the security is relatively high. The disadvantage is that the chip core chip has a large area and the cost of the chip is high. At the same time, the product structure design should consider the chip placement position and the space limitation of the peripheral line trace.

The other is a separate mode in which the chip and the sensor are separately designed, that is, similar to the conventional capacitive touch screen mode, the fingerprint recognition chip is equivalent to the touch chip, and the sensor is intended to be the sensing sensor of the capacitive screen. The advantage of this mode is that the structural design of the product can be flexible. The chip can be placed on a motherboard with ample space. The sensor can be placed on any surface of the product according to the user's usage habits. The module assembly is dispersed and integrated into other products. In the production process, the cost is very low. At present, there is no mature sensor circuit optimization scheme for the shortcomings of this mode. The large number of peripheral line connection costs of the inductor is very high, unless it is integrated into other surface device circuits with similar resolutions, and is time-division or voltage-divided.

Nowadays, more mixed modes of the above two modes are adopted, that is, the fingerprint identification chip and the sensor are separately produced by the chip wafer factory and the silicon wafer factory, and unified to the chip packaging factory to chip the chip wafer and the silicon wafer factory. The peripheral circuit is integrated and packaged into one chipset firmware, and then the peripheral components of the module factory are packaged into a single module for shipment.

This mixed mode chipset package also has different ways. Some chipsets solder chip chips and inductors to a single substrate board, and then take the line from the substrate board to the FPC or product motherboard. Some chipsets The chip is first soldered to the sensor, directly from the sensor to the substrate board, connected to the FPC or the product board. Fingerprint information collection methods include optical image scanning, direct capacitive sensing, active pressing capacitive sensing, scanning capacitive sensing, direct RF reflection, scanning RF reflection, and capacitive sensing and RF reflection mixing. There are three types: pressing, touching, and sliding.

At present, the main obstacles to the application of fingerprint recognition modules on mobile phones are application software development, secure communication protocols and detection standards.

First of all, because the industry does not have a unified standard, there is no uniform testing instrument to define the product's eligibility criteria. This is the same as the current capacitive screen market. On the one hand, it gives mobile phone terminal manufacturers a lot of room to play, on the other hand, it also increases the difficulty of developing mobile phone terminal manufacturers.

Secondly, the Android system has retracted the fingerprint recognition function module. The non-Apple camp manufacturers need to develop their own fingerprint recognition application software based on ARM instructions, and they need to have the underlying system data processing capability.

The interface compatibility of the security protocol, the manufacturer should be able to develop a compatible data exchange security interface for the industry system. Under the premise of ensuring the security of the fingerprint identification data, it can exchange data with other software, which needs to be very in the industry. Strong system integration capabilities.

This has led to the current mobile phone terminal manufacturers who want to fingerprint identification products, either their own software development and debugging capabilities, or the fingerprint chip manufacturers have the ability to provide complete software solutions for you to use, and have the ability to provide you with later testing and debugging. service.

Fingerprint recognition is not the only secure authentication mode. No matter the traditional password input security authentication mode or the current biometric security authentication mode, only different security authentication information generation methods are provided. The main security protection measures are still the process of data encryption and decryption, and the authentication information cannot be completely guaranteed. Absolutely safe. At this level, fingerprint recognition only enhances the complexity of password generation and the uniqueness of data acquisition.

Fundamentally speaking, the security authentication function provided by fingerprint identification is consistent with the traditional password function, and the final security barrier of the hardware product is still mechanical password authentication. All other security authentication methods are only for the convenience of solving the password generation and The uniqueness of password data acquisition is only a supplement to mechanical password authentication.

Guangzhou Zhongyi Technology Co.,Ltd-fingerprint module, fingerprint sensor  

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Fingerprint Identification Chip Industry Research-fingerprint module of Guangzhou Zhongyi Technology Co., Ltd

I. Industry Overview

1. Background brief

In today's era of informationization and technology, biometrics is gradually emerging, and gradually replacing traditional password recognition will be the general trend. The disadvantages of traditional password recognition technology are that it is easy to lose, stolen, forgotten or not carried, such as passwords, passwords, ciphers, and the like. In addition, it is not uniquely bound to the user. Once someone has obtained this information, he will have the same rights as the owner. Biometrics can make up for the shortcomings of traditional password recognition, including biometrics such as face, iris and vein. Fingerprint recognition is the most mature technology in biometric identification on the market and the most widely used.

2. Definition

Fingerprint recognition is a kind of biometric application, and it is a subdivision of the contrarian growth in the electronic supply chain in the past two years.

Fingerprint recognition refers to the identification by comparing the detailed feature points of different fingerprints. Fingerprint recognition technology involves image processing, pattern recognition, computer vision, mathematical morphology, wavelet analysis and many other disciplines. Since each person's fingerprint is different, there is a clear difference between the fingers of the same person, so the fingerprint can be used for identification.

3. Introduction to algorithm principle

If you zoom in and look at the fingerprint, you will find that it is as high and low as the valley, and everyone is different, forming a unique biological characteristic. Each fingerprint has about 50 feature points, and the position and direction of the feature points can be used for fingerprint recognition. In general, fingerprint recognition technology does not completely record the entire fingerprint, but only the characteristics of the fingerprint. The preservation of fingerprints is related to personal privacy. After the analysis of the feature points of fingerprints, most of them will be stored as a certain data stream through encryption.

4. Main technical indicators

1 false recognition rate: the probability that two different fingerprints are incorrectly recognized as the same fingerprint;

2 Rejection rate: It means that two different fingerprint samples of the same finger cannot match, that is, the probability of being considered to be from different fingers;

3 matching time: the time required for two fingerprint samples to perform a comparison match;

4 feature size: the storage capacity of the fingerprint feature extracted from a fingerprint image;

5 memory size: the amount of memory that the computer system needs to occupy at various stages of fingerprint recognition;

Second, the industry chain and market conditions

1. Industry Driver: Technology Upgrade

The potential of fingerprint recognition in the field of unlocking and mobile payment was immediately explored by the market. Since 2014, major manufacturers have adopted fingerprint recognition modules. Today, when the smartphone is nearly saturated, the fingerprint recognition chip is a segment of the contrarian growth.

In addition to smartphones, other applications include computers and their peripheral products (USB, mouse), smart cards (debit cards, credit cards, ID cards, public transport cards), cars (door handles, steering wheels), door locks, wearable devices. , medical fields (pharmaceutical cabinets, wards), public security systems for banks and financial systems. Due to the large shipments of smart phones, the scale effect of the industry has caused the price of fingerprint identification modules to drop. It is expected that smart cards, IoT devices, and wearable devices will gradually use fingerprint chips.

The large-scale application of fingerprint recognition lies in the cost reduction, and the core of the decline lies in the technological upgrade of the chip. More powerful, cost-effective chips can quickly open up sales. Therefore, the driving force of the fingerprint identification chip industry lies in technology upgrades. The scope of specific investment targets should be selected among the vendors who master the core technologies.

With the expansion of the application of fingerprint recognition in the future, fingerprint demand will continue to increase. According to CCID Consulting's data, in 2015, the global smart terminal fingerprint identification chip shipments reached 478 million, and the market sales reached 2.11 billion US dollars. It is estimated that by 2018, the global smart terminal fingerprint identification chip market will reach 1.199 billion, with a compound annual growth rate of approximately 36% and sales of US$3.07 billion. In terms of shipment growth rate, fingerprint identification achieved rapid penetration in 2014 and 2015, and the growth rate rose rapidly. It is expected that the industry will gradually enter a stable development period after 2016. However, it should be noted that the increase in shipments is bound to bring about the tight production capacity of upstream wafer foundries. Whether fingerprint identification chip manufacturers can guarantee the production capacity of the foundry is very important. The usual practice in the industry is that at the beginning of each year, fingerprint identification chip manufacturers communicate the distribution of annual production capacity based on on-hand orders and foundries.

2. Technology path

(1) According to the production method, it is divided into: optical, ultrasonic, and capacitive.

1 Optical recognition is an earlier fingerprint recognition technology based on the light emitted by the optical transmitting device, which is reflected on the finger and then reflected back to the machine.

2 Capacitive type is a video with a certain gradation by using the difference between the ridges and valleys of the finger fingerprint and the smoothness of the silicon plate.

3 Ultrasound is the latest technology. It can be used for living body recognition by using ultrasonic waves to penetrate the material and generate echoes of different sizes depending on the material.

(2) Capacitive can be subdivided into two technical routes: Coating and cover.

1Coating is not only coating technology, but is mainly coated on the back of the mobile phone;

2 cover generally refers to the use of a cover to close or cover the section;

a. Glass cover: The module has simple process, low cost and mature industrial chain. It is a cost-effective fingerprint identification solution, but it is thick and fragile.

b. Ceramic cover: relatively thin, good toughness, high sensitivity, and reasonable price, but it is difficult to process.

c. Sapphire cover: high hardness and corrosion resistance, but there are weaknesses with high cost and weak resistance to falling.

Coating has the advantage of being cheap ($10 for sapphire, $5 for glass, and $3-4 for Coating), but performance and longevity cannot be compared to glass. Therefore, the industry generally believes that fingerprint identification chips have a technical route between coating and glass.

(3) Fingerprint identification industry chain

In general, fingerprint recognition needs to go through three important steps: “chip-module-machine”, and the chip link mainly involves “chip design—wafer production—chip packaging and testing”, and module manufacturers are on the chip. After reprocessing, it is sold to the whole machine manufacturer. In the entire fingerprint identification industry, the chip portion accounts for about 70% of the total value, and the value ratio is the highest, and the remaining 30% is divided by modules and complete machines.

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Fingerprint or face recognition, which unlock method is safer for you-fingerprint module of Guangzhou Zhongyi Technology Co., Ltd

Nowadays, with the rapid development of Internet technology, mobile phones have become an indispensable part of life. A small mobile phone contains all the secrets of a user. The security of these secrets always makes users nervous.

Since the smartphone device has biometric unlocking technology, the process of unlocking the password has gradually been abandoned by the user.

Fingerprint unlocking is actually using a capacitive fingerprint module to make an electric field using a silicon crystal cell and a conductive subcutaneous electric electrolyte. The fluctuation of the fingerprint will cause different changes in the pressure difference between the two, thereby achieving accurate Fingerprint determination. The fingerprint unlocking of most smartphones is mainly divided into front fingerprint unlocking, back fingerprint unlocking and side fingerprint unlocking.

The front fingerprint is unlocked by combining with the Home button, which has a good interactive experience; the back recognition speed is usually faster, it is not easy to soil and reduce the sensitivity; the side is also good, the touch unlock is convenient, and can be combined with the power button. Together, it is more convenient after getting used to it.

Including the current screen fingerprint unlocking, it also uses optical sensing technology to identify the human body ID. Some mobile phones carry this kind of optical fingerprint recognition, which is a relatively common fingerprint recognition technology. However, this technology also has its drawbacks. It is difficult to exert its full strength in a complex environment and subject to environmental constraints.

In addition to face recognition, in simple terms, when the mobile phone collects facial information, the front camera is basically a display, but relies on the cooperation of infrared lens, flood light sensing element and dot matrix projector. Among them, the dot matrix projector will emit more than 30,000 spots projected on your face, draw a three-dimensional model of the three-dimensional map, the infrared lens will read these dot patterns, and send information to the processor The safety isolation zone is matched against the contrast, while the floodlighting is to ensure that the face is protected from ambient light.

After completing the entry of Face ID, you will continue to recognize you even if you wear glasses, a long beard, and a hat with a face ID, and continually calibrate the recognition model based on the new data.

For example, Face ID can't effectively distinguish between twins or similar people, and less than 10% will affect the battery.

After the normal use of the Face ID, the phone must be unlocked after the phone is restarted. In short, the Face ID is available, and various bugs are frequently used. Of course, as the technology continues to advance, the face recognition data is more and more advanced.

Fingerprints and faces have their own advantages. Face recognition is convenient in many times, and fingerprint privacy is better. Perhaps face recognition will have more development, but for now, the security of fingerprint unlocking is still It is higher than the face unlock.

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Analyze the principle of mobile phone fingerprint recognition-fingerprint module of Guangzhou Zhongyi Technology Co., Ltd

The fingerprint is the line of the protrusion on the epidermis. The starting point, the end point, the joint point and the bifurcation point of the line are called the detailed feature points of the fingerprint. Since the fingerprint of the person is the combination of genetics and environment, it is closely related to human health. Therefore, fingerprints are available to everyone, but they are different. Because the fingerprint repetition rate is extremely small, it is called "human identity card." It is because of its lifetime immutability, uniqueness and convenience that fingerprints have long been used for identity verification. Since ancient times, China has used fingerprints to draw. However, in the 1990s, an automatic fingerprint identification system for personal identification was developed and applied.

Can't unlock the wet hand? Analyze the principle of mobile phone fingerprint recognition

The first fingerprint identification mobile phone was developed by Siemens and used scratch-type fingerprint recognition technology. It was born in 1998. After nearly 15 years of development, the arrival of iPhone 5s has completely opened the skylight for fingerprint recognition. The world's high-end flagship mobile phones are all At the beginning, fingerprint identification technology has entered the ranks of thousands of yuan. Although the fingerprint recognition technology has experienced "fast development" in the past three years, fingerprint technology has made rapid progress, and fingerprint recognition sensitivity has become more and more High, but fingerprint recognition still has a crippling defect, that is, (most of them) mobile phone wet hands can not fingerprint recognition and unlock, let's take a look at why wet hands can not be unlocked? First let's take a look at the principle and classification of the fingerprint identification module.

Principle and classification of fingerprint identification module

The fingerprint identification module realizes the identification of individual fingerprint features through a specific sensing module. Simply put, each fingerprint phone will have a fingerprint identification module, through which the user's fingerprints are collected and converted into data, stored in a specific area of ​​the phone storage, called at the time of use, and different fingerprint recognition technologies are collected. The way fingerprints are also different.

According to different ways of collecting fingerprints, the fingerprint identification module is mainly divided into an optical fingerprint module, a capacitive fingerprint module, and a radio frequency fingerprint module.

The optical fingerprint module uses light reflection imaging to identify the user's fingerprint. This type of fingerprint module has certain requirements on the temperature and humidity of the use environment, and is not ideal in the recognition accuracy. In addition, such a module generally takes up more. The space makes it difficult to make a difference on the mobile phone.

Principle of capacitive fingerprint technology

The capacitive fingerprint module uses an electric field of silicon to form an electric field with a conductive subcutaneous electrolyte. The fluctuation of the fingerprint will cause different changes in the pressure difference between the two, thereby achieving accurate fingerprint measurement. This method has strong adaptability and no special requirements for the use environment. At the same time, the space occupied by silicon crystal elements and related sensing elements is within the acceptable range of mobile phone design, which makes the technology better promoted on the mobile phone side. . The current capacitive fingerprint module is also divided into two types: scratch type and push type. Although the former has a small footprint, it has great disadvantages in terms of recognition rate and convenience. This also directly causes manufacturers to lock their eyes. Press-type capacitive fingerprint module with more random operation and higher recognition rate.

The capacitance pattern recognition module is mainly composed of a chip, a "sapphire", a metal ring, a soft board, a carrier board, etc., wherein the chip is also a sensor part, and "sapphire" is responsible for being a protective layer (some manufacturers choose other materials as a protective layer, The cost will be reduced accordingly), the metal ring acts as a trigger for fingerprint recognition.

Principle of RF fingerprint technology

At present, the RF fingerprint module includes both radio wave detection and ultrasonic detection. The principle is similar to that of detecting the submarine material. It is based on the signal reflection of a specific frequency to detect the specific shape of the fingerprint. The RF fingerprint module technology emits a small amount of radio frequency signal through the sensor itself, and penetrates the skin layer of the finger to control the texture of the inner layer to obtain the best fingerprint image. The biggest advantage of this type of fingerprint module is that the finger does not need to be in contact with the fingerprint module, and thus does not have much influence on the appearance of the mobile phone. Based on this, the RF fingerprint module has become one of the main development directions of fingerprint identification in the future.

Why is the fingerprint of the mobile phone unlocked when it encounters a wet finger?

On the one hand, most smartphones today use images formed by uneven fingerprint lines. When the finger is pressed on the glass plate, since the fingerprint is textured, the ridge is convex, and the glass plate is contacted to form a mark; and the lines are concave between the lines, and the glass plate cannot be contacted, and no trace can be formed. In this way, a light and dark stripe pattern is formed on the glass plate. However, when the finger is wet, there is a water film on the surface of the fingerprint, which fills the concave portion between the lines. In this way, when the finger is pressed onto the glass plate, there will be no streaks between the light and the dark, and the fingerprint is naturally unrecognizable.

On the other hand, the current high utilization rate in mobile phones is mainly capacitive. Capacitive fingerprint recognition technology is of course operated by the human body's current sensing; it is understood that the fingerprint technology of the capacitive technology is coated with a long and narrow electrode. When the finger touches the sensor surface, the human body electric field, the human fingerprint line and the sensor surface A coupling capacitor is formed. For high-frequency current, the capacitor is a direct conductor, so the finger draws a small current from the surface of the contact point. This current flows out of the surrounding electrode and flows through the surrounding electrode. The current is proportional to the distance from the fingerprint to the periphery. The controller calculates the touch fingerprint by accurately calculating the current ratio. Because the water has conductive properties, when the wet hand touches the sensor, the current on the surface of the finger is affected by the water on the finger, which causes the fingerprint to be inaccurate or not good.

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Iris recognition and face recognition are hot, but fingerprint recognition is still irreplaceable-fingerprint module of Guangzhou Zhongyi Technology Co., Ltd

First, the introduction of fingerprint identification technology

1. Principles of fingerprint recognition technology

Everyone's fingerprint pattern is unique. Fingerprint recognition technology is to use the uniqueness of the texture, identify the identity by collecting the fingerprint image and comparing the fingerprint features.

The information collection of fingerprints mainly includes parameters such as type, coordinates and direction, and then supplemented with detailed features such as endpoints, bifurcation points, isolated points, short forks, and rings. The characteristics of the fingerprint are divided into general features and local features. The overall features refer to features directly observed by the human eye, such as basic pattern, core points, triangle points, and number of lines; local features refer to nodes on the fingerprint, such as bifurcation points. , termination point, center point, triangle point, etc. The above features will be used in fingerprint recognition, but the endpoints and bifurcation points are used more often. Usually the algorithm records their position and direction.

The user needs to collect the fingerprint before using the fingerprint recognition finger, and perform DSP image processing on the collected fingerprint to generate a fingerprint image with clear details. The fingerprint feature is then extracted and the extracted fingerprint feature is saved as a template. In the verification phase, the user first collects fingerprints, and then the system automatically compares with the fingerprint library template and gives a comparison result.

2. Classification of mainstream fingerprint recognition technology

(1) Capacitive fingerprint recognition

Capacitive fingerprint recognition uses the skin surface of the finger as a pole. The ridge line and the valley form different capacitance values ​​due to the different distance from the surface of the chip, so that the capacitive fingerprint recognition sensor acquires fingerprint image information.

Capacitive fingerprint recognition is weak for wet fingers and dirty fingers. The reason is that there are water, sweat and other debris on the surface of the finger or chip, so that the ridges and valleys cannot fully contact the sensor, resulting in a weak capacitance value. Capacitive fingerprint recognition requires multiple presses for the first time to capture the fingerprint. This is because the current push-type acquisition has the problem of small fingerprint area, and it is necessary to press a large number of fingerprint images. After obtaining a qualified fingerprint image, the image needs to be enhanced and refined by an algorithm to obtain a relatively clear image, and then feature extraction is performed. When the user uses the fingerprint recognition again, the mobile phone is automatically unlocked by the feature point proofing.

Capacitive fingerprint recognition is divided into three types: cover type, coating type, and hidden type. The cover plate refers to the capacitive fingerprint identification of the chip protection material is sapphire, glass or ceramic; the coating is a protective film on the surface of the fingerprint chip, which is easier to wear than the cover plate, but the cost is relatively low; In three types, Under Glass needs to dig blind holes in the glass cover. The current process requirements are high and the yield is low. In Glass integrates the Sensor into the glass, which is difficult and has few manufacturers. Underder Glass The solution reaches the limit of capacitance identification, and the current effect is general.

(2) Ultrasonic fingerprint recognition

The principle of ultrasonic fingerprint recognition is similar to that of sonar. The ultrasonic wave is first emitted, and then the signal reflection by a specific frequency is received to detect the specific shape of the fingerprint. Specifically, the ability to penetrate the material by ultrasonic waves is used to distinguish the fingerprint according to the echo generated by different materials. The location where the ridge line and valley are located.

Ultrasonic fingerprint recognition can penetrate metal, glass and other materials, enabling on-screen fingerprint recognition without opening. At the same time, the ultrasonic fingerprint recognition is less affected by the dirt, water, etc. on the surface of the finger, and can still be accurately identified.

(3) Optical fingerprint recognition

Optical fingerprint recognition is currently the most widely used fingerprint recognition technology. For example, many of the previous attendance machines and access control use optical fingerprint recognition technology. Its principle is to place a finger on the optical lens, and the finger is projected by the prism under the illumination of the internal light source, and then the prism is black and the valley is white. Multi-gray fingerprint image processed. However, due to the need for a long optical path and a sufficiently large size, it has so far been used less in smartphones. And optical fingerprint recognition can only scan the dead skin layer, can not penetrate into the dermis layer, so it is easy to be affected by the cleanliness of the fingerprint.

Nowadays, the new optical fingerprint recognition technology is mainly for smart phones. It abandons the optical system of traditional optical fingerprints and uses the light of the screen of the mobile phone as a light source. These are divided into two types, one based on OLED screen design and the other based on LCD screen design. At present, the mainstream solution is to make optical fingerprints through self-illuminating OLED screens, while LCDs cannot be self-illuminated, backlights are needed, and the entire module is thick, which also makes it possible to realize fingerprint recognition under the LCD screen. Very difficult (OLED can do very thin), but there are still manufacturers doing this because it faces a broader market.

Second, smart terminals tend to coexist with multiple biometric technologies

In the short term, there is no need to worry that fingerprint recognition will be replaced by other biometric methods, and the fingerprint recognition penetration rate will continue to rise. Because various identification methods have advantages and disadvantages and application scene defects, a variety of identification methods may be the future development direction of mobile phone biometrics.

Previously announced a new comprehensive biometric technology that combines traditional fingerprint recognition and facial recognition to bring greater convenience and security to smartphones, tablets and notebooks. Users can choose the one they like best or the most convenient way to unlock the device. Related biometric technology companies are also moving in this direction.

Third, fingerprint identification does not exist in the short term

The functions and technologies used by the high-end flagship machines represent the future direction of mobile phones, and the biometric functions of smart terminals will coexist in various ways. At the same time, biometric recognition technologies such as iris recognition and face recognition also have their own shortcomings, so fingerprint identification technology does not have the possibility of being replaced by other biometric technologies in the short term.

1. Advantages, disadvantages and applications of iris recognition

Due to the invariance and uniqueness of the iris, iris recognition technology has become an important means of identification. Iris recognition technology identifies the identity through the unique features of the human eye iris, and the accuracy of iris feature matching exceeds even DNA matching.

Advantages: easy to use; high reliability; no physical contact.

Disadvantages: It is difficult to miniaturize the size of the image acquisition device; the cost of the device is high; the lens may produce image distortion and reduce reliability; an automatic iris recognition system consists of two modules: hardware and software: iris image acquisition device and iris recognition algorithm . Corresponding to the two basic problems of image acquisition and pattern matching, respectively.

2. Advantages, Disadvantages and Application of Face Recognition

Using the established face feature template and the face image of the subject to perform feature analysis, a similar value is given according to the analysis result. Use this value to determine if it is the same person.

Advantages: non-contact, easy to use; high recognition accuracy; easy to collect, low cost

Disadvantages: The invariance of the face is relatively poor; the use of different scenes is easily affected by factors such as light; the security is low.

Application: Face recognition is the most widely used biometric method. It is used in enterprise attendance and online financial services, but it is used less in high security applications. There are more face recognition phones, and the Samsung S8 also has face recognition.

3. Fingerprint identification mobile phone shipment year compound growth will exceed 20%, fingerprint recognition penetration rate will continue to increase

According to Sigmaintell data, global fingerprint identification handset shipments reached 640 million units in 2016, up 70% from the 376 million units in 2015. In the first quarter of this year, the global shipment of fingerprint-enabled smartphones was approximately 180 million units, accounting for 53.7% of the total global smartphone shipments, up 18% year-on-year.

According to data from Rising Sun Data, in 2015, the global smart phone fingerprint recognition penetration rate reached 25%, and the domestic smartphone penetration rate was 26%. However, by 2016, the penetration rate of fingerprint recognition mobile phones increased sharply, and the domestic penetration rate was 61%. The international penetration rate is 43%, and the domestic penetration rate is much higher than that of foreign countries. Among them, the shipment of fingerprint recognition mobile phones in the Android system reached 437 million units, an increase of 181% compared with the same period of last year. This is mainly because domestic Android mobile phone manufacturers accelerated the popularity of fingerprint recognition in low-end and mid-range smartphones. According to Rising Sun Data, by 2020, the global fingerprint identification penetration rate will reach 88%, the global fingerprint mobile phone will reach 1.46 billion, and the Android system fingerprint mobile phone will reach 1.276 billion. The global compound growth rate of global fingerprint identification mobile phone shipments will be around 20%.

However, we believe that the growth of fingerprint recognition mobile phone shipments will exceed the forecast of Rising Sun Big Data, because the increase in penetration rate is mainly due to the rapid popularity of fingerprint recognition in low-end machines. However, the price war of fingerprint chips has started, and some manufacturers' chips have been launched. The latest offer is under $1.50, which will accelerate the popularity of fingerprint recognition in low-end machines. The global compound growth rate of fingerprint-identified mobile phone shipments will exceed 20%. At the same time, there are data showing that in the first quarter of 2017, the domestic fingerprint identification penetration rate reached 78%, and the international penetration rate reached 51%. This year's domestic fingerprint identification mobile phone penetration rate is expected to exceed the previous 70% forecast.

Guangzhou Zhongyi Technology Co.,Ltd-fingerprint module, fingerprint sensor  

http://www.zyjjhome.com/

[itsjohnleeblog]

Iris recognition and face recognition are hot, but fingerprint recognition is still irreplaceable-fingerprint module of Guangzhou Zhongyi Technology Co., Ltd

First, the introduction of fingerprint identification technology

1. Principles of fingerprint recognition technology

Everyone's fingerprint pattern is unique. Fingerprint recognition technology is to use the uniqueness of the texture, identify the identity by collecting the fingerprint image and comparing the fingerprint features.

The information collection of fingerprints mainly includes parameters such as type, coordinates and direction, and then supplemented with detailed features such as endpoints, bifurcation points, isolated points, short forks, and rings. The characteristics of the fingerprint are divided into general features and local features. The overall features refer to features directly observed by the human eye, such as basic pattern, core points, triangle points, and number of lines; local features refer to nodes on the fingerprint, such as bifurcation points. , termination point, center point, triangle point, etc. The above features will be used in fingerprint recognition, but the endpoints and bifurcation points are used more often. Usually the algorithm records their position and direction.

The user needs to collect the fingerprint before using the fingerprint recognition finger, and perform DSP image processing on the collected fingerprint to generate a fingerprint image with clear details. The fingerprint feature is then extracted and the extracted fingerprint feature is saved as a template. In the verification phase, the user first collects fingerprints, and then the system automatically compares with the fingerprint library template and gives a comparison result.

2. Classification of mainstream fingerprint recognition technology

(1) Capacitive fingerprint recognition

Capacitive fingerprint recognition uses the skin surface of the finger as a pole. The ridge line and the valley form different capacitance values ​​due to the different distance from the surface of the chip, so that the capacitive fingerprint recognition sensor acquires fingerprint image information.

Capacitive fingerprint recognition is weak for wet fingers and dirty fingers. The reason is that there are water, sweat and other debris on the surface of the finger or chip, so that the ridges and valleys cannot fully contact the sensor, resulting in a weak capacitance value. Capacitive fingerprint recognition requires multiple presses for the first time to capture the fingerprint. This is because the current push-type acquisition has the problem of small fingerprint area, and it is necessary to press a large number of fingerprint images. After obtaining a qualified fingerprint image, the image needs to be enhanced and refined by an algorithm to obtain a relatively clear image, and then feature extraction is performed. When the user uses the fingerprint recognition again, the mobile phone is automatically unlocked by the feature point proofing.

Capacitive fingerprint recognition is divided into three types: cover type, coating type, and hidden type. The cover plate refers to the capacitive fingerprint identification of the chip protection material is sapphire, glass or ceramic; the coating is a protective film on the surface of the fingerprint chip, which is easier to wear than the cover plate, but the cost is relatively low; In three types, Under Glass needs to dig blind holes in the glass cover. The current process requirements are high and the yield is low. In Glass integrates the Sensor into the glass, which is difficult and has few manufacturers. Underder Glass The solution reaches the limit of capacitance identification, and the current effect is general.

(2) Ultrasonic fingerprint recognition

The principle of ultrasonic fingerprint recognition is similar to that of sonar. The ultrasonic wave is first emitted, and then the signal reflection by a specific frequency is received to detect the specific shape of the fingerprint. Specifically, the ability to penetrate the material by ultrasonic waves is used to distinguish the fingerprint according to the echo generated by different materials. The location where the ridge line and valley are located.

Ultrasonic fingerprint recognition can penetrate metal, glass and other materials, enabling on-screen fingerprint recognition without opening. At the same time, the ultrasonic fingerprint recognition is less affected by the dirt, water, etc. on the surface of the finger, and can still be accurately identified.

(3) Optical fingerprint recognition

Optical fingerprint recognition is currently the most widely used fingerprint recognition technology. For example, many of the previous attendance machines and access control use optical fingerprint recognition technology. Its principle is to place a finger on the optical lens, and the finger is projected by the prism under the illumination of the internal light source, and then the prism is black and the valley is white. Multi-gray fingerprint image processed. However, due to the need for a long optical path and a sufficiently large size, it has so far been used less in smartphones. And optical fingerprint recognition can only scan the dead skin layer, can not penetrate into the dermis layer, so it is easy to be affected by the cleanliness of the fingerprint.

Nowadays, the new optical fingerprint recognition technology is mainly for smart phones. It abandons the optical system of traditional optical fingerprints and uses the light of the screen of the mobile phone as a light source. These are divided into two types, one based on OLED screen design and the other based on LCD screen design. At present, the mainstream solution is to make optical fingerprints through self-illuminating OLED screens, while LCDs cannot be self-illuminated, backlights are needed, and the entire module is thick, which also makes it possible to realize fingerprint recognition under the LCD screen. Very difficult (OLED can do very thin), but there are still manufacturers doing this because it faces a broader market.

Second, smart terminals tend to coexist with multiple biometric technologies

In the short term, there is no need to worry that fingerprint recognition will be replaced by other biometric methods, and the fingerprint recognition penetration rate will continue to rise. Because various identification methods have advantages and disadvantages and application scene defects, a variety of identification methods may be the future development direction of mobile phone biometrics.

Previously announced a new comprehensive biometric technology that combines traditional fingerprint recognition and facial recognition to bring greater convenience and security to smartphones, tablets and notebooks. Users can choose the one they like best or the most convenient way to unlock the device. Related biometric technology companies are also moving in this direction.

Third, fingerprint identification does not exist in the short term

The functions and technologies used by the high-end flagship machines represent the future direction of mobile phones, and the biometric functions of smart terminals will coexist in various ways. At the same time, biometric recognition technologies such as iris recognition and face recognition also have their own shortcomings, so fingerprint identification technology does not have the possibility of being replaced by other biometric technologies in the short term.

1. Advantages, disadvantages and applications of iris recognition

Due to the invariance and uniqueness of the iris, iris recognition technology has become an important means of identification. Iris recognition technology identifies the identity through the unique features of the human eye iris, and the accuracy of iris feature matching exceeds even DNA matching.

Advantages: easy to use; high reliability; no physical contact.

Disadvantages: It is difficult to miniaturize the size of the image acquisition device; the cost of the device is high; the lens may produce image distortion and reduce reliability; an automatic iris recognition system consists of two modules: hardware and software: iris image acquisition device and iris recognition algorithm . Corresponding to the two basic problems of image acquisition and pattern matching, respectively.

2. Advantages, Disadvantages and Application of Face Recognition

Using the established face feature template and the face image of the subject to perform feature analysis, a similar value is given according to the analysis result. Use this value to determine if it is the same person.

Advantages: non-contact, easy to use; high recognition accuracy; easy to collect, low cost

Disadvantages: The invariance of the face is relatively poor; the use of different scenes is easily affected by factors such as light; the security is low.

Application: Face recognition is the most widely used biometric method. It is used in enterprise attendance and online financial services, but it is used less in high security applications. There are more face recognition phones, and the Samsung S8 also has face recognition.

3. Fingerprint identification mobile phone shipment year compound growth will exceed 20%, fingerprint recognition penetration rate will continue to increase

According to Sigmaintell data, global fingerprint identification handset shipments reached 640 million units in 2016, up 70% from the 376 million units in 2015. In the first quarter of this year, the global shipment of fingerprint-enabled smartphones was approximately 180 million units, accounting for 53.7% of the total global smartphone shipments, up 18% year-on-year.

According to data from Rising Sun Data, in 2015, the global smart phone fingerprint recognition penetration rate reached 25%, and the domestic smartphone penetration rate was 26%. However, by 2016, the penetration rate of fingerprint recognition mobile phones increased sharply, and the domestic penetration rate was 61%. The international penetration rate is 43%, and the domestic penetration rate is much higher than that of foreign countries. Among them, the shipment of fingerprint recognition mobile phones in the Android system reached 437 million units, an increase of 181% compared with the same period of last year. This is mainly because domestic Android mobile phone manufacturers accelerated the popularity of fingerprint recognition in low-end and mid-range smartphones. According to Rising Sun Data, by 2020, the global fingerprint identification penetration rate will reach 88%, the global fingerprint mobile phone will reach 1.46 billion, and the Android system fingerprint mobile phone will reach 1.276 billion. The global compound growth rate of global fingerprint identification mobile phone shipments will be around 20%.

However, we believe that the growth of fingerprint recognition mobile phone shipments will exceed the forecast of Rising Sun Big Data, because the increase in penetration rate is mainly due to the rapid popularity of fingerprint recognition in low-end machines. However, the price war of fingerprint chips has started, and some manufacturers' chips have been launched. The latest offer is under $1.50, which will accelerate the popularity of fingerprint recognition in low-end machines. The global compound growth rate of fingerprint-identified mobile phone shipments will exceed 20%. At the same time, there are data showing that in the first quarter of 2017, the domestic fingerprint identification penetration rate reached 78%, and the international penetration rate reached 51%. This year's domestic fingerprint identification mobile phone penetration rate is expected to exceed the previous 70% forecast.

Guangzhou Zhongyi Technology Co.,Ltd-fingerprint module, fingerprint sensor  

http://www.zyjjhome.com/

[itsjohnleeblog]

Research on fingerprint recognition technology under optical screen-fingerprint module of Guangzhou Zhongyi Technology Co., Ltd

Although the current unlocking speed and success rate of mobile phone screens are slightly less than the mainstream open-hole fingerprint unlocking, the superiority of the new unlocking technology is superior to the traditional fingerprint unlocking. The direction will also be it.

Technological innovation caused by comprehensive screen

In 2018, it can be said that it is the first year of the full screen, and next year and the next year will still be the full screen world. All manufacturers will unite this industry chain to the highest peak, and bring 100% full-screen mobile phones in the true sense. This is very beneficial for the supply chain.

Due to the elimination of the traditional fingerprint recognition module, the technology of the fingerprint under the screen helps the manufacturer to achieve a higher screen ratio when designing the full screen, without having to leave a certain space for the fingerprint module. The manufacturer does not have to put the fingerprint module on the back of the phone, thus destroying the integrity of the phone ID design. At the same time, since the screen fingerprint technology does not require a separate fuselage opening, the mobile phone can be better implemented when the waterproof function is added.

Among them, the development of ultrasonic and optical technologies is the most breakthrough. It is estimated that the fingerprint recognition technology of ultrasonic and optical screens will increase the proportion of mobile phone fingerprint recognition market from 3% last year to 13%.

Identification method determines the direction of the supply chain

Although the technology that the domestic manufacturers are the first to focus on is focused on the screen optical fingerprint recognition and 3D structured light field, there is no performance in the market dominated by a certain field. However, capacitive screen fingerprinting technology will gradually be replaced, which is considered by the industry as a trend.

One of the root causes is cost. At present, the cost of fingerprint recognition under the screen is higher, but the yield is not yet high. And with the screen panel, so now used in the high-end flagship.

Due to the competition in the supply chain price cut, the price of fingerprints under the optical screen will drop by as much as 70%, and the Aegis, which is the first to launch, will bear the brunt. Nowadays, the major fingerprint manufacturers have joined the battle, and the unit price of optical fingerprint recognition products is likely to continue to fall.

Balance between supply and demand determines price declines

At present, the global fingerprint chips are mainly concentrated in the 180nm and 350nm process foundries of 8-inch and 12-inch wafer production lines. Due to the global terminal demand and the impact of pre-inventory, the fingerprint chip factory orders are cautious and conservative, and the supply and demand of global fingerprint chips are basically In balance, the price decline has begun to narrow.

Due to the relatively high maturity of the fingerprint supply chain under the optical screen, the major fingerprint module manufacturers have already achieved good mass production and are driven by the terminal mobile phone brand project. The optical fingerprint recognition scheme under the screen has achieved scale in the first quarter. Production, in the second half of the year, there will be more screen-printing solutions in commercial customers in more mass production projects, providing new impetus for the company's growth.

Screen fingerprinting technology has historically been limited by insufficient yield and insufficient investment by relevant industry. As mobile phone operators expand their demand for fingerprint recognition under the screen, supply chain operators are facing this technology and investing resources to improve yield and seek. A better cost plan.

On the other hand, the fingerprint technology under the ultrasound screen is also actively developed by Qualcomm, which will cover the market share of 6.3% of the mobile phone fingerprint identification market in 2019.

The shuffle after the growth is inevitable

Although the sales scale of the fingerprint identification module has been significantly expanded to help reduce the marginal cost, the fierce market competition still leads to a decrease in the gross profit margin of the fingerprint identification module. Therefore, in the current state of the new fingerprint technology, fingerprint chip companies are welcoming a new round of reshuffle, who can take the lead in mass production, and can follow up on the subsequent production capacity, who will become the biggest winner.

Guangzhou Zhongyi Technology Co.,Ltd-fingerprint module, fingerprint sensor  

http://www.zyjjhome.com/

[itsjohnleeblog]

Semiconductor fingerprint recognition has become popular-fingerprint module of Guangzhou Zhongyi Technology Co., Ltd

As a smart home entry-level product, the smart door lock market has grown at an alarming rate in recent years. According to market research organizations, the market for smart door locks based on biometrics and networking has reached 3 million units since 2016. It is predicted that by 2020, the entire smart door lock market will reach 60 million or more. The amount will be broken by 66 billion yuan, and the industry will enter the blowout period.

Although for the 'central' of smart homes, each family has different ideas, but the importance and strategic status of smart door locks is undisputed. The strategic emerging industry represented by the Internet of Things will become a strong support for China. One of the seven strategic industries in development, lock is an indispensable part of the Internet of Things industry, so the 'Twelfth Five-Year Plan' provides an opportunity for the development of smart locks.

Compared with other biometric technologies, fingerprint recognition, as the rigid demand of smart locks, occupies 80% of the family market. It is believed that this rigid demand will still occupy a high share in the future. With the outbreak of the smart lock market, believe in fingerprints. Module shipments will also show rapid growth.

As mentioned above, in the field of smart door locks that are about to blow out, the development of fingerprint recognition is limitless. With the rapid popularization of this technology, the fingerprint smart lock market has begun to show new changes, and the market advantage is gradually biased towards the product field with semiconductor fingerprint recognition as the core. With the gradual increase of smart door locks and the urgent need for technology transformation and upgrading, the share of semiconductor fingerprint recognition will gradually surpass the traditional optical products and become the standard for smart fingerprint locks in the next few years.

As far as the technology itself is concerned, for the application of smart door locks, semiconductor fingerprint recognition is superior to traditional optical sensors. The recognition rate of semiconductor sensors for relatively shallow fingers and fingerprints is much higher, performance is better, security and The anti-copy level will be higher and the overall user experience will be better.

The reason why optical fingerprinting has been widely used in the past is mainly because of the low cost, but it is obvious that this advantage is slowly losing. In terms of specific technical advantages, semiconductor fingerprint recognition is a fingerprint acquisition method that utilizes the conductivity of a finger and is transmitted to the dermis layer of the finger through electromagnetic waves, thereby enabling a stronger ability to prevent false fingerprints, and effectively improving the fingerprint lock. The security, while the ordinary optical technology simply uses the difference of the plane image captured to capture, so the technology itself does not have anti-counterfeiting ability.

Moreover, in the fingerprint lock recognition rate, the semiconductor type is higher than the traditional optical type, which mainly collects the fingerprint ridge to the touchpad to form fingerprint data, so it is better than the optical scanning precision, and can also be collected. Finer fingerprint details, faster acquisition speeds and less environmental impact.

In addition, in practical applications, the semiconductor fingerprint module not only has lower power consumption, but also the size of the entire module can be made smaller, so it can be more flexibly integrated into the smart door lock, such as now on the market. Many companies like to design the fingerprint recognition module on the handle of the door lock, and because of the limitation of the area, the optical module cannot be used.

In short, in the background of the rapid start of smart door locks and the urgent transformation of products to technology, semiconductor fingerprinting will gradually replace traditional optical technology in the next few years, and it will be used in the field of smart door locks. Jia Anxin believes that with the steady decline in the price of chips and modules, smart door locks with higher reliability will further penetrate thousands of households and drive home safety into a new era.

Guangzhou Zhongyi Technology Co.,Ltd-fingerprint module, fingerprint sensor  

http://www.zyjjhome.com/

[itsjohnleeblog]

What changes have the smart fingerprint lock brought to the security industry?-fingerprint module of Guangzhou Zhongyi Technology Co., Ltd

With the change of users' consumption concept, the requirements for family life are getting higher and higher. Especially for home safety and property safety.

Due to the change of user consumption concept, the problem of social security, and the concerns about the loopholes of traditional security products, the demand for intelligent security products has been increasing, and the demand for smart fingerprint locks is increasing.

"Conversion of consumption concept"

With the development of the economy, the per capita income of residents has also increased. In the household consumption, the price is no longer the primary consideration, and users pay more attention to convenience and experience.

Many young people will pay attention to the development trend of smart homes while pursuing a comfortable and livable environment. They hope to introduce some cutting-edge technologies, keep up with the trend and lead the trend.

From the past to the present, from ordinary locks to today's smart fingerprint locks, users are paying more and more attention to personal safety and property safety. The shift in consumer perceptions has pushed the smart home industry to new heights. This is the progress of science and technology and the inevitable trend of development.

"Social security problem"

At present, most communities have implemented comprehensive prevention and control systems such as video, network, social patrol, population and housing vehicles, and the social security prevention and control system has also achieved certain results.

However, with the continuous increase of urban floating population, social security issues are still a management problem. People have put forward new requirements for housing and home security.

In addition to the security facilities and property security provided by the original real estate company, people gradually began to choose and purchase some intelligent home security equipment. Smart fingerprint lock is the first choice for home security. Compared with the whole house intelligent security system, the cost is lower, and at the same time it can solve the security problem.

"Traditional mechanical locks are more vulnerable"

The traditional mechanical lock has low safety performance. No matter which one of the three grades A, B and C, there are problems such as easy to open, easy to open, easy to be re-engraved, etc. Security is mainly based on passive prevention. And people often lose their keys or forget to bring keys, which provides the opportunity for theft to some extent.

There are many ways to unlock the smart fingerprint lock. The password, fingerprint, and self-setting combination password make the thief unable to guess. Moreover, the fingerprint collection part is outside the door, the central control part is inside, and the automatic alarm system is also connected, so there is no need to worry that the door lock will be maliciously damaged by the thief.

The fingerprint card's proximity card is managed by rights, which is not easy to crack, and the corresponding code can be deleted from the permission after the sensor card is lost, so that even if the sensor card is picked up, it cannot be opened. It can also solve people's daily forgetting to bring keys, lose keys and other troubles.

"Intelligent fingerprint locks form a three-dimensional security system"

Security products such as intelligent door locks and monitoring equipment make up for the shortcomings of traditional security, and security is developed from passive prevention to early warning.

Fingerprint lock intelligent alarm technology, through the built-in chip, custom connection community security system, can achieve the perfect combination with the home security system, all-round protection of home security.

Once someone steals the door lock through the mechanical keyhole, the lock body will immediately issue a voice alarm; if a violent unlocking or illegal entry occurs, the user's mobile phone and the property security department will be immediately alerted.

As the advantages of smart fingerprint locks continue to emerge, traditional mechanical locks will be replaced step by step. Fingerprint locks are not only an upgrade of lock technology, but will also change our lifestyle.

The technology of intelligent fingerprint lock has been relatively mature, and its supporting applications are constantly being developed and improved. In the future, the use of fingerprint locks will be more abundant and convenient.

Guangzhou Zhongyi Technology Co.,Ltd-fingerprint module, fingerprint sensor  

http://www.zyjjhome.com/

[itsjohnleeblog]

The difference between smart fingerprint lock and ordinary lock-fingerprint module of Guangzhou Zhongyi Technology Co., Ltd

The popularity of smart fingerprint locks in China has been very fast in recent years and has reached a well-known level. Think about the number of friends and family who have heard, seen, and used fingerprint password locks. Mass media and TV dramas are the fastest to promote new things and new products. At present, there are many smart fingerprint lock manufacturers to carry out celebrity endorsements, movies, TV series, micro-movies, online dramas and other advertising. This shows that smart fingerprint lock is not a future trend, but is happening in our daily life, is popularizing our daily life, and friends with advanced concepts and easy to receive new things are slowly replaced with high-end fingerprint locks. how about you? If you have a friend around you to introduce you to the smart fingerprint lock, don't refuse it! He introduces you to a new way of life, safe and convenient, is also a symbol of identity, can protect your property security, so that you no longer have the key!

Smart locks and mechanical locks are two different types. With the advent of modern society, smart locks have become more and more popular, people will prefer smart locks as an option, and for people's lives, smart locks are obviously It is a more suitable choice. Smart locks are now used in many communities, especially in high-end residential areas. The following Huaying fingerprint lock manufacturers will introduce you to the difference between smart locks and mechanical locks.

Disadvantages of ordinary mechanical locks:

1. The mechanical lock requires a mechanical key, and each door needs to be equipped with one or a few keys, which is a bit troublesome;

2. The mechanical lock is easy to open and easy to be opened by the technology. It is turned on in a few seconds or ten minutes, and the anti-theft coefficient is poor;

3. The general mechanical locking technology has low opening ability;

4. The key is easily lost or even copied;

5. Daily forgetting to bring the key will cause inconvenience;

Smart lock refers to a lock that is more intelligent in terms of user identification, security, and management than traditional mechanical locks. Smart locks are made using electronic technology, integrated circuit design, a large number of electronic components, and a variety of innovative identification technologies.

Advantages of smart fingerprint lock:

1. Security. The anti-technical opening ability is higher, the security is higher, the ordinary mechanical lock key can be copied, the owner does not feel relieved after using the other, the fingerprint is unique, and there are no two identical fingerprints in the world.

2, convenience. The operation is safe and convenient, it is not necessary to carry the key with you, and it is the key that will never be lost. The fingerprint of one person will remain unchanged for life, and the fingerprint can be used once for a lifetime. And one can enter fingerprints of different fingers. Touch to open, lock with one button or reverse button.

3. Scalability. It can accommodate hundreds or even thousands of fingerprints, and can optionally register fingerprints and delete fingerprints. It is very convenient to manage fingerprints. Compared with ordinary mechanical locks, it can save the trouble of preparing keys and recovering keys. It is especially suitable for community rooms. Villas as well as office and rental rooms.

4, can set multiple sets of passwords, and has a password anti-peep function (ie garbled input). And the operation is fast and the password can be changed at any time.

5, long-term maintenance-free. The ordinary mechanical lock has a short service life, and is prone to failure during use, and has to break into the door, and the fingerprint lock basically does not malfunction.

6, the recognition rate is high. The rejection rate is less than 5 parts per million, and the false recognition rate is less than one in a million. The fingerprint can be correctly compared in a large angle.

7, fashion. Fingerprint password technology is the direction of the development of locks. The use of fingerprint locks represents fashion, dignity and cutting edge. The design is stylish and generous.

Smart locks generally require electricity or batteries to work, and in the event of a power outage, the smart lock cannot be opened or closed. Therefore, the state stipulates that civilian smart locks should be equipped with emergency mechanical keys.

Guangzhou Zhongyi Technology Co.,Ltd-fingerprint module, fingerprint sensor  

http://www.zyjjhome.com/

[itsjohnleeblog]

What is smart fingerprint lock and password lock?-fingerprint module of Guangzhou Zhongyi Technology Co., Ltd

Fingerprint lock is a kind of intelligent lock with human fingerprint as the identification carrier and means. It is the crystallization of computer information technology, electronic technology, mechanical technology and modern hardware technology. What are the advantages and disadvantages of smart fingerprint locks? Is the consumer choosing a fingerprint lock or a password lock when purchasing?

First, the introduction of fingerprint lock

1. Principle: Fingerprint lock refers to the use of fingerprint as the input signal, and the relevant information is identified and processed to control the mechanical actuator to open and close the lock.

2. Composition: Fingerprint identification and control part: consists of fingerprint acquisition instrument, arithmetic control component and input/output circuit; lock body and outer casing part: consists of mechanical lock body, outer casing and handle.

3. Principle: The fingerprint feature is unique and permanent, so we can associate a person with his fingerprint. By comparing his fingerprint characteristics with pre-saved fingerprint features, he can verify his true identity.

4. Function: The functions of fingerprint lock mainly include: fingerprint login, fingerprint deletion, information storage, usage authority management, alarm, emergency unlocking, etc. In addition, many manufacturers have added some additional functions, such as integrated doorbell, voice prompts, networking, telephone alarms, etc. The high-performance fingerprint lock is also equipped with a human-machine dialogue system such as a liquid crystal display, which has a high level of intelligence and has a guiding operation. , query the opening record and built-in parameters, setting status and other functions.

Second, the fingerprint lock is good or bad

1. Safe and reliable: The fingerprint is unique. There are no two identical fingerprints in the world. It is safe and reliable to use the fingerprint as the key. In addition, the use of the fingerprint anti-theft lock is also stable.

2. Convenient and quick: no need to worry about going out to forget to carry the keys, go out to travel to lose the keys, go shopping and go to the bag to find the keys, go to the community to exercise or walk to lose the keys, go home and open the door quickly and easily.

3. Smart fashion: Smart home is the label of modern family quality life. The convenience and security of the fingerprint lock and its exquisite appearance have already kept the quality of the home close to the trend of fashion. More suitable for modern young people.

4. Too many unlocking methods: the fingerprint lock can also be set to remote control, telephone unlocking, SMS unlocking and other unlocking methods. The more the fingerprint lock is unlocked, the security stability is also easy to discount.

5. Stability should be strengthened: the fingerprint lock is a motor-integrated device. The quality of the lock core is good or bad, and the scientific and rationality of the circuit design will affect the stability of the fingerprint lock.

6. Recognition rate to be improved: Usually 1%-5% of people can't use fingerprint lock, or need multiple recognition to pass. However, some manufacturers do finger vein locks to compensate for this shortcoming of fingerprint recognition.

7. The battery life is different: the battery life is usually one year, and the actual life is also half a year. The user cannot be prompted to replace the battery, and the user is often rejected. When the remote control or IC card function is added, the power consumption is very large.

Third, which is better

1. Fingerprint lock: Fingerprint wear problem: You can enter more than one finger fingerprint. If it is worn out, you can change your finger to open the door. The fingerprint identification window is scratched. Try to make the finger flat on the fingerprint identification window. After using for a while, use a soft cloth to remove dirt from the surface of the fingerprint window.

2. Password lock: Passwords are not leaked, which means security. The password lock itself is a mechanical jamming mechanism, which is also done by mechanical action. It is obviously complicated, the probability of failure is relatively high, and the electronic device is afraid of humidity, afraid of strong magnetism, and is afraid of strong vibration, making it suitable for use. The environment has certain requirements.

Of course, many people love the “fingerprint + password” in one fingerprint password lock, so the fingerprint lock guarantees unique, safe, special circumstances, fingerprints are accidentally damaged or when no one is at home, the guest can also inform them of the password when they suddenly visit. Fast.

Guangzhou Zhongyi Technology Co.,Ltd-fingerprint module, fingerprint sensor  

http://www.zyjjhome.com/

[itsjohnleeblog]

Safety factor of intelligent fingerprint lock-fingerprint module of Guangzhou Zhongyi Technology Co., Ltd

The fingerprint lock was installed at home, and the home was just a finger, and the door was opened. The convenience and comfort brought to us have been loved by everyone. So, is it safe to use a fingerprint lock? With this question, let's discuss it together.

The fingerprint lock is to add the fingerprint unlocking function to the technology of the original mechanical lock. The main technique of fingerprint unlocking is to store the fingerprint information of the user first. When the user uses the fingerprint to verify, the fingerprint recognition system compares the fingerprint of the user with the stored fingerprint. If the verified fingerprint matches the pre-stored fingerprint, the door lock will open. If it does not match, an error will be indicated and the door lock will not open.

Fingerprint lock is to know the master and unlock by the method of whether the fingerprint matches, then the authenticity of the fingerprint is an important technical indicator of the fingerprint lock. At present, probes widely used in the market to identify fingerprints can be divided into two categories, one is an optical fingerprint head and the other is a semiconductor fingerprint head.

The optical fingerprint probe uses light scanning, the information obtained by light reflection recognizes the fingerprint, and the fingerprint shape structure is recognized to obtain fingerprint information; if the criminal wants to fake the master's fingerprint to open the door, then he must obtain the fingerprint of the owner, and also have High-precision modeling equipment. Then, as the owner of the house, are you worried that your fingerprints will be stolen by criminals in teacups, purses, handbags, etc. You don’t need to worry about it, because even in teacups, purses, and handbags. Your fingerprint must be read using a very high-precision instrument to read it. High-precision instruments like this are only available to the public security department.

A semiconductor fingerprint probe that uses a capacitive read-in system to form fingerprint information using fingerprint changes in the groove, 嵴 (including the epidermis and dermis) and the read-in surface; if the criminal wants to fake the fingerprint of the owner to open the door, not only does it need to be obtained. The master's fingerprint, but also to fake objects similar to creatures, the difficulty of forgery is higher than the optical fingerprint probe.

Both types of fingerprint heads can correctly identify the owner's fingerprints, and each has a higher security level. The difference is that the former type of cost is cheaper, the latter type of cost is much more expensive, and the average category can be used by ordinary families and businesses. One type can be used in important departments such as banks and treasury.

The fingerprint lock is upgraded by the mechanical lock. Its main purpose is to improve the convenience of our lives in the case of securing property. Compared with the mechanical lock, the fingerprint lock is one level higher, and the criminals want to fake the owner. The fake fingerprint is hundreds of times more difficult than the shackle.

In general, the use of fingerprint locks is safer and more convenient and comfortable than using mechanical locks.

Guangzhou Zhongyi Technology Co.,Ltd-fingerprint module, fingerprint sensor  

http://www.zyjjhome.com/

[itsjohnleeblog]

How does fingerprint recognition fly into the homes of ordinary people?-fingerprint module of Guangzhou Zhongyi Technology Co., Ltd

Why does the phone use fingerprint recognition technology?

To say why this smart phone is worthy of fingerprint recognition technology, we must first talk about the use, advantages and disadvantages of fingerprint recognition technology. As we all know, the uniqueness of fingerprints makes fingerprint recognition technology one of the most secure biometrics. Of course, technologies such as iris recognition and retina recognition are also highly secure, but the use of this technology pose is very important, coupled with its high cost, has become an obstacle to the promotion of these biometric technologies on the mobile phone. In contrast, fingerprint recognition technology is more freely free, coupled with the relatively low application cost and small space occupation of the technology, it has become the darling of mobile security.

Fingerprint recognition is more comprehensive and accurate than other biometric methods

On the other hand, as the functionality of smartphones continues to increase, personal privacy issues are beginning to plague everyone. Finding a smart phone that can effectively protect personal privacy has become a hard demand of many users. Under this circumstance, major mobile phone manufacturers have taken the opportunity to launch their own fingerprint recognition mobile phones, and have advertised the protection function of the impregnable. However, as mentioned before, the price of fingerprint mobile phones has driven from the high-end market of 6,000 to 7,000 yuan, and has already dropped into the market within a thousand dollars. Then, is there any difference in fingerprint recognition technology for fingerprint mobile phones with such large price differences? What about this? This is about the specific classification of fingerprint recognition technology.

Principle and classification of fingerprint identification module

As mentioned above, the uniqueness of the fingerprint makes it one of the biometrics of the identification, and the fingerprint identification module is to realize the identification of the individual fingerprint feature through a specific sensing module. In other words, each fingerprint phone has a fingerprint identification module, through which the user's fingerprints are collected and converted into data, and then stored in a specific area of ​​the phone storage, in case of need to call. The key point of different fingerprint recognition technologies is the way in which fingerprints are collected.

According to different ways of collecting fingerprints, the fingerprint identification module is mainly divided into an optical fingerprint module, a capacitive fingerprint module and a radio frequency fingerprint module. Among them, the optical fingerprint module, as its name suggests, uses light reflection imaging to identify the user's fingerprint. This type of fingerprint module has certain requirements on the temperature and humidity of the use environment, and is not ideal in the recognition accuracy, plus this module is generally Will take up more space, making it difficult to make a difference on the phone.

The capacitive fingerprint module uses an electric field of silicon to form an electric field with a conductive subcutaneous electrolyte. The fluctuation of the fingerprint causes a different change in the pressure difference between the two, thereby enabling accurate fingerprint measurement. This method has strong adaptability and no special requirements for the use environment. At the same time, the space occupied by silicon crystal elements and related sensing elements is within the acceptable range of mobile phone design, which makes the technology better promoted on the mobile phone side. . It should be pointed out that the current capacitive fingerprint module is also divided into two types: scratch type and push type. Although the former takes up a small volume, it has a great disadvantage in terms of recognition rate and convenience, which also directly leads to manufacturers. The focus is locked on a push-type (capacitance) fingerprint module that is more arbitrarily operated and has a higher recognition rate.

For the last RF fingerprint module, the current stage includes both radio wave detection and ultrasonic detection. The principle is similar to that of detecting the submarine material. It is based on the signal reflection of a specific frequency to detect the specific shape of the fingerprint. The biggest advantage of this type of fingerprint module is that the finger does not need to be in contact with the fingerprint module, and thus does not have much influence on the appearance of the mobile phone. Based on this, the RF fingerprint module has become one of the main development directions of fingerprint identification in the future.

Guangzhou Zhongyi Technology Co.,Ltd-fingerprint module, fingerprint sensor  

http://www.zyjjhome.com/

[itsjohnleeblog]

Face unlocking and fingerprint unlocking Which is better?-fingerprint module of Guangzhou Zhongyi Technology Co., Ltd

For the current mobile phone manufacturers' focus: fingerprint unlocking and face unlocking, which one is better?

Let's first take a look at the fingerprint unlock that appeared earlier.

The principle of fingerprint lock technology refers to the uneven texture on the front of the finger. Although the fingerprint is a small part of the human skin, it contains a lot of information. These lines are the same in the pattern, breakpoint and intersection. They are referred to as "features" in information processing, and it has been medically proven that these features are different for each finger, and these features are unique and permanent.

Therefore, we can associate a person with his fingerprint and verify his true identity by comparing his fingerprint characteristics with pre-saved fingerprint features.

The first fingerprint identification phone was developed by Siemens and was born in 1998 using scratch-type fingerprint recognition technology. After 15 years of development, the arrival of iPhone5s has completely opened the skylight for fingerprint recognition. The world's high-end flagship mobile phones have begun to tackle fingerprint recognition technology. Now, fingerprint recognition technology has entered the ranks of thousands of yuan, although fingerprint recognition technology has experienced nearly Three years of "fast development", fingerprint technology has made rapid progress, fingerprint recognition sensitivity has become higher and higher, but fingerprint recognition still has a crippling defect, that is, (most) mobile phone wet hands can not fingerprint Identify unlocks.

Principle and classification of fingerprint identification module

Optical fingerprint

It uses light emission imaging to identify the user's fingerprint. This type of fingerprint module has certain requirements on the temperature and humidity of the use environment, and it is not ideal in the recognition accuracy. In addition, such a module generally takes up space, making it difficult to The mobile phone has made a difference.

2. Capacitive fingerprint

In the capacitive fingerprint module, an electric field is formed by using a silicon crystal element and a conductive subcutaneous electrolyte, and the fluctuation of the fingerprint causes a difference in the pressure difference between the two, thereby realizing accurate fingerprint measurement. The method has strong adaptability and no special requirements for the use environment. At the same time, the space occupied by the silicon wafer and the related sensing elements is within the acceptable range of the mobile phone, so that the technology is better promoted on the mobile phone end. The current capacitive fingerprint module is also divided into two types: scratch type and push type. Although the former has a small footprint, it has great disadvantages in terms of recognition rate and convenience. This also directly causes manufacturers to lock their eyes. Press-type capacitive fingerprint module with more random operation and higher recognition rate.

The capacitance pattern recognition module is mainly composed of a chip, a "sapphire", a metal ring, a soft board, a carrier board, etc., wherein the chip is also a sensor part, and "sapphire" is responsible for being a protective layer (some manufacturers choose other materials as a protective layer, The cost will be reduced accordingly), the metal ring acts as a trigger for fingerprint recognition.

3. RF fingerprint

At present, there are two kinds of radio wave detection and ultrasonic detection. The principle is similar to the detection of the sonar of the seabed material. The signal reflection is placed at a specific frequency to detect the specific shape of the fingerprint. The RF finger module technology emits a small amount of RF signal through the sensor itself, and penetrates the skin layer of the finger to control the texture of the inner layer to obtain the best fingerprint image. The biggest advantage of this type of fingerprint module is that the finger does not need to be in contact with the fingerprint module, and thus does not have much influence on the appearance of the mobile phone. Based on this, the RF fingerprint module has become one of the main development directions of fingerprint identification in the future.

 Going back to the above question, why is it that the fingerprint of the mobile phone has been wet and it doesn't work? On the one hand, most of today's smartphones use images formed by uneven fingerprint lines. When the finger is pressed on the glass plate, since the fingerprint is textured, the line is convex, and the glass plate is contacted to form a mark; and the lines are concave between the lines, and the glass plate cannot be contacted, and no trace can be formed. In this way, a light and dark stripe pattern is formed on the glass plate. However, when the finger is wet, there is a water film on the surface of the fingerprint, and this water fills the concave portion between the lines. In this way, when the finger is pressed onto the glass plate, there will be no streaks between the light and the dark, and the fingerprint is naturally unrecognizable.

On the other hand, the current high utilization rate in mobile phones is mainly capacitive. Capacitive fingerprint recognition technology is of course operated by the human body's current sensing; it is understood that the fingerprint technology of the capacitive technology is coated with a long and narrow electrode. When the finger touches the sensor surface, the human body electric field, the human fingerprint line and the sensor surface A coupling capacitor is formed. For high-frequency current, the capacitor is a direct conductor, so the finger draws a small current from the surface of the contact point. This current flows out of the surrounding electrode and flows through the surrounding electrode. The current is proportional to the distance from the fingerprint to the periphery. The controller calculates the touch fingerprint by accurately calculating the current ratio. Because water has conductive properties, when the wet hand touches the sensor, the current on the surface of the finger is affected by the water on the finger, which causes the fingerprint to be inaccurate or not good.

Implementation of fingerprint recognition

The premise of fingerprint recognition is to collect fingerprints. At present, there are two main types of acquisition methods: sliding and pressing.

The first step: fingerprint collection

Sliding capture is the finger swiping over the sensor to get the fingerprint image of the phone. Sliding acquisition has the advantage of being relatively low cost and capable of capturing large areas of images. However, this collection method has a poor experience. The user needs a continuous standard sliding action to achieve successful acquisition, and the probability of acquisition failure is greatly increased. This type of collection has been used in a brand of mobile phone, and it has been criticized for its short form of sliding collection.

Push-type collection, as the name suggests, is to achieve fingerprint data acquisition on the sensor. This collection method is of course better for the user experience, but the cost is higher than the sliding acquisition, and the technical difficulty is relatively high. In addition, since the area of ​​the fingerprint collected at one time is smaller than that of the sliding type acquisition, it is necessary to collect the image multiple times, and to spell out a larger area of ​​the fingerprint image. This must rely on advanced algorithms, using software algorithms to compensate for the relatively small area of ​​the fingerprint obtained by sliding press acquisition to ensure the accuracy of recognition.

Step 2: Fingerprint evaluation

After the fingerprint is collected, the collected fingerprint is then evaluated for quality. If it is not qualified, it should be taken again. If it is qualified, the image is enhanced and refined.

Step 3: Extract the "features"

After processing, the binarized graph, the refined graph, and the extracted feature graph are sequentially obtained. After obtaining a clearer image, it begins to extract features. After the feature extraction is used to store the data, the next step of matching can be performed.

Step 4: Fingerprint matching

One thing to note in the matching is that the two sample images of the same finger will be different due to the displacement, deflection, and force of the finger, which will be calibrated when matching, through the feature point set. Calibration and other methods ensure the accuracy of fingerprint recognition.

 Then let's take a look at the face to unlock.

What factors have driven this year's face unlocking to become the mainstream of mobile phone unlocking?

I think the most important factor is the improvement of industrial design and manufacturing process. This year's comprehensive screen has become the mainstream trend in industrial design. The large fingerprint design has been moved to the back of the mobile phone, and the user experience of fingerprints has been reduced. The face not only makes up for the lack of experience, but more importantly, the face can be completed only by the camera, and does not need to occupy more screen area like a fingerprint, so it can greatly increase the screen ratio.

The second reason is the cost and benefit problem. If the manufacturer wants to install a fingerprint module and an iris module in a small space such as a mobile phone, the internal space occupied by the mobile phone to be sacrificed, in other words, the cost required is enormous. Face recognition does not take up more internal space than the camera module.

The third is the improvement of chip processing power and the maturity of face recognition algorithms. Some hardware layer acceleration schemes allow face recognition algorithms to run faster on mobile phones, and new live technology can make brushing faces safer. This will be specifically mentioned later.

Let's talk about the fact that it is not safe to solve the problem.

Common biometrics, in addition to fingerprints, irises, include some biometric features such as the vein, sclera, and retina. Traditional biometrics collect all the characteristics of privacy, so the face is a relatively different way of biometric recognition. It collects a data that is not so private, because in our daily life, you can easily expose your photos. .

Let me talk about the common mistakes in face recognition.

We often encounter some problems, how much does the face recognition security score? How many fingerprints? Safety standards are never simply measurable with percentage numbers. The criterion for judging safety is cost. Let's take the lock as an example. The attack cost of the A-class lock can be broken within one minute; the supply cost of the B-class lock is almost 5 minutes; there is a C-class lock, that is, the lock for the vault, it takes three hours to Give the lock a break. So the standard of security is actually the cost of your attack. The iPhone X is more secure, not to say that his face recognition rate is higher than the single-shot phone, but his attack cost is higher. Because the structured light camera can defend against all plane attacks, the attacker needs to create a stereo face model to attack.

Guangzhou Zhongyi Technology Co.,Ltd-fingerprint module, fingerprint sensor  

http://www.zyjjhome.com/

[itsjohnleeblog]

Determining the factors of fingerprint unlocking speed and analysis of security issues-fingerprint module of Guangzhou Zhongyi Technology Co., Ltd

In the short period of two or three years, thousands of machines and even hundred yuan machines have also been equipped with a large number of models equipped with fingerprint recognition technology. At one time, fingerprint recognition technology has gradually become the standard for smart phones. In addition, the function of fingerprint recognition is also from the previous single unlock, to the current unlocking, payment and launch of various applications and other functions, convenient for users to use while also protecting the security of user information.

The current fingerprint identification technology mainly includes optical fingerprint recognition technology, capacitive fingerprint recognition technology and radio frequency fingerprint recognition technology. Because capacitive fingerprint recognition has the characteristics of small size and wide applicability, most of the current smart phones adopt capacitive type. Fingerprint recognition technology.

Perhaps you are not interested in the fingerprint recognition module used in the mobile phone used; but everyone must be concerned about the speed of fingerprint unlocking and the security of fingerprint recognition. This should be the most fingerprint recognition technology for users. Direct, most important experience, today we will simply understand the factors that determine the speed of fingerprint unlocking and the security of fingerprint recognition.

Fingerprint recognition technology specific work process

Fingerprint recognition technology is a set of technical solutions combining software and hardware. On the hardware side, the finger is scanned and collected by means of capacitive/optical/radio frequency by means of contact. On the software side, the DSP fingerprint image processor preprocesses, binarizes and refines the generated fingerprint image, and the extracted fingerprint features are compared with the pre-recorded fingerprint database by software algorithm, and finally the recognition result is output.

Factors that determine the speed at which the fingerprint is unlocked:

1. Fingerprint module algorithm speed: When we put the fingerprint in the fingerprint module collection area, the fingerprint sensor needs to collect the graphic information of the fingerprint, and then the collected graphic information needs to be converted into digital information, and then the previously converted converted information. The digital information is compared. If the matching is successful, the speed of the fingerprint module algorithm determines the speed of fingerprint unlocking.

2. Mobile phone hardware processing speed: Although the fingerprint unlocking time is completed in less than one second, it has gone through three processes. Firstly, the sensor detects the finger pressing and judges that the finger covers the sensor area to meet the verification standard. Secondly, the fingerprint data is verified. Finally, by illuminating the screen and unlocking the screen, each process depends on the processing power of the hardware itself, and the processing speed of the mobile phone hardware will also be related to the fingerprint unlocking speed.

3. Fingerprint recognition cover: The fingerprint recognition cover also plays a decisive role in the speed of fingerprint unlocking. At present, the more mature solutions in the mobile phone market include sapphire, coated, ceramic cover and glass. The fingerprint identification cover not only has a protective effect, but also has a good recognition ability. The higher the dielectric constant of the fingerprint recognition cover, the better the signal strength, the stronger the penetration ability, the more sensitive the recognition, so the unlocking speed will be more advantageous, so the fingerprint recognition cover material also affects the fingerprint unlocking speed.

Fingerprint identification security issues

At present, with the continuous popularization and development of mobile payment, fingerprint recognition technology is widely used in mobile payment and other fields in addition to unlocking; but with the popularity of mobile payment, some people who are skeptical have begun to target users' mobile phones, making fingerprints Identification technology provides a “favorable way” for them to steal money; thus, the security of fingerprint recognition technology has begun to receive widespread attention from users.

From the above examples, as long as the user's fingerprint is extracted, a "fake fingerprint" can be created. This "fake fingerprint" can easily unlock the mobile phone and even invade your mobile payment system, causing you to suffer property losses. So from the current situation, some fingerprint identification schemes seem to have become unsafe.

Although these "fake fingerprint" recognition technologies are still difficult for ordinary people to grasp, if you encounter a professional to steal your fingerprints and mobile phones, your property becomes extremely dangerous. In order to improve the security of fingerprint identification and avoid the occurrence of unnecessary property or the theft of important data, some fingerprint identification technology companies have emerged, which may be the best solution for cracking fake fingerprints.

Live fingerprint technology is a method that integrates higher levels of security into existing standard fingerprint security systems, including sensors that measure blood flow and identify true and false fingers. Allow users to significantly improve security without sacrificing convenience. Compared with the traditional fingerprint identification scheme, the method of identifying the living fingerprint is more efficient, faster, and the recognition success rate is higher.

The live fingerprint uses the built-in live fingerprint detection and heart rate detection function to effectively identify the fake fingerprint and simultaneously detect the heart rate, which can provide consumers with more secure protection for mobile payment; in addition, the chip algorithm is also optimized in the fingerprint Recognition speed will also bring a better experience.

Guangzhou Zhongyi Technology Co.,Ltd-fingerprint module, fingerprint sensor  

http://www.zyjjhome.com/