The first batch of South Korean Samsung to use fingerprint recognition under Qualcomm's ultrasonic screen, the fingerprint recognition under screen of Galaxy S10 and Galaxy Note10 series installed a few days ago. Now it is reported that Samsung may abandon the fingerprint recognition system under ultrasonic screen. .
Since October 2019, Samsung has successively received customer complaints, indicating that the Galaxy S10 and Galaxy Note 10 series phones have frequent fingerprint recognition problems under the screen. After the mobile phone screen with the fingerprint recognition system under the ultrasonic screen is added with a protective sticker, as long as the fingerprint printed on the protective sticker is used, even anyone pressing the fingerprint may pass through the barrier and unlock, thus causing personal information leakage and mobile wallets. Misappropriation and other security concerns.
For this situation, the solution Samsung proposed at the time was to ask consumers not to post a protection sticker until they have completed the latest software update.
However, it is impossible to reduce the seriousness of the situation by requiring consumers to avoid the contingency action of protecting stickers before completing the latest software. Because of fear of leakage of various assets, in addition to the two major mobile payment platforms in China, Alipay and WeChat payment considerations may affect the user's golden stream encryption authentication, both announced the suspension of support for Samsung's two series of new mobile phone payment, and the United States Began to concern Samsung's two series of smartphones.
As the current problem has not been resolved and the market has attracted more doubts, according to foreign news reports, Samsung may launch a new smartphone in 2020, abandon the fingerprint recognition system under the ultrasonic screen and switch to 3D sensing jet lag The ranging (ToF) module performs 3D face recognition.
At present, there are two application architectures for fingerprint recognition systems under the market screen. Optical fingerprint recognition is the most commonly used solution. Not only smart phone applications, including building fingerprint recognition systems, corporate attendance fingerprint recognition systems, etc., use optical fingerprint recognition. The main principle is to rely on the sensor to project the light, obtain the light reflection to draw the fingerprint pattern, and compare it with the fingerprint image of the system memory to achieve the recognition function.
However, this under-screen optical fingerprint recognition system used on smart phones is limited by the size of the phone, and can only abandon the ordinary optical illumination system, using the light on the screen of the phone as a light source. At the same time, the LCD screen itself cannot emit light, so the products supporting optical fingerprint recognition under the screen are all OLED screens.
The advantage of optical fingerprint recognition under the screen is that it can avoid the interference of ambient light to the greatest extent, and even has better stability in extreme environments. But the optical fingerprint recognition under the screen also faces the problem of dry finger recognition rate.
However, because certain areas of the screen are lit, it is inevitable that some parts of the screen are prone to aging, and the power consumption of optical fingerprint recognition under the screen is much higher than traditional capacitive fingerprints, which need to be resolved.
The other is the fingerprint recognition system under the ultrasonic screen. At present, the ultrasonic fingerprint recognition technology under the screen is the most advanced technology. The recognition process is when a finger touches the screen of a smart phone, an ultrasonic wave is emitted to the surface of the finger through the sensor, and the difference between the surface of the fingerprint and the density of the air is used to construct a 3D image. After receiving the ultrasonic echo message, the sensor compares with the information stored in the mobile phone to achieve the purpose of identifying fingerprints.
The advantage of ultrasonic fingerprint recognition under the screen is that it has strong penetrability and high anti-fouling ability. Even wet and dirty fingers can be perfectly recognized by using smart phones. Due to the excellent penetration of ultrasound, it can also support other living body detection. Through the ultrasonic fingerprint recognition under the screen, 3D fingerprint recognition images can be obtained, and the security is higher than other fingerprint recognition technologies under the screen. However, due to technical complexity, the cost is also the highest among fingerprint recognition solutions under the screen.
At present, although it is reported in the market that Samsung may abandon fingerprint recognition under the ultrasonic screen, and instead use 3D face recognition with 3D sensing time difference ranging module. However, market participants pointed out that in the past, Samsung had internally evaluated that if the ToF solution was adopted, there would still be errors in the accuracy of ToF recognition. Coupled with the fact that the face recognition system has not yet been fully popularized, most consumers may not be used to changing from fingerprint recognition to face recognition, and there may be cost considerations. It seems that it is possible to make further changes in the future Still full of variables.