According to the Android central website, developing the technology of embedding fingerprint sensor into smartphone display has always been regarded as the highest goal in the field of smartphone biometrics. As smart phone manufacturers continue to move towards the goal of "comprehensive screen" design, off screen fingerprint technology provides another way to further improve the extremely important index - screen proportion.Off screen fingerprints also provide an advantage of the future model - in the market where mobile phone design is becoming more and more homogeneous and basically become a glass brick, this is an urgent differentiated competitive advantage.Therefore, it is not surprising that this emerging technology suddenly appears in the supply chain rumors about future mobile phones, especially apple and Samsung, the two largest mobile phone manufacturers. There were rumors a few years ago that Samsung would launch Galaxy series smartphones with fingerprint sensors embedded in the display screen. In fact, Samsung's current key design, a clickable virtual home key with pressure sensing function, seems to be designed around the concept of off screen fingerprint.
But so far, in addition to several concept devices released by Chinese manufacturers, off-screen fingerprint technology has not been really applied to mobile phones.This is why when evaluating the design of Huawei mate RS Porsche, what I am most interested in about this $2000 (about 12735 yuan) mobile phone is that a company has finally released a mobile phone using off-screen fingerprint technology. The off screen fingerprint technology designed by Huawei mate RS Porsche is called "on screen fingerprint".But after a few minutes of using this feature, my enthusiasm dissipated. The process of registering fingerprints in the off-screen fingerprint sensor made me fully understand that this new fingerprint sensor is unacceptably slow compared with the common power plant sensors in flagship mobile phones in the past few years. In the past few product cycles, the "swish" speed of smartphone fingerprint sensor spoiled us.
We have no reason to doubt that Huawei has suddenly launched a flagship mobile phone with a price of up to $2600 (about 16555 yuan). Huawei will certainly try its best to configure the best components for this mobile phone, but these components are very slow.Android central said that there are still some practical problems with off-screen fingerprint technology. As an optical sensor is used, it must actually "see" the fingerprint before scanning the fingerprint. Therefore, when the user unlocks the mobile phone with his finger, the area around the key must have a certain brightness. It's no problem in broad daylight, but in a dark bar or bedroom? Its performance is problematic.In 2018, off screen fingerprint will still be a demonstration technology: although it works, it is slow and unreliable.
Especially on mate RS, it takes some time to find and press the fingerprint sensor under the screen (like the fingerprint sensor "sees" the fingerprint plane image, the current optical sensor needs pressure to function normally).Since the fingerprint sensor is located about a quarter above the display screen, it is not easy to find it by touch alone - because the fingerprint sensor itself is embedded in the display screen, the user can't feel its position. In addition, the fingerprint sensor embedded in the display screen can not provide vibration feedback to guide users to find it. Users need to stare at the phone and find the fingerprint sensor.After a complex process, many users will find that it is better to use Huawei's excellent face unlocking function, which is not only faster, but also more reliable.
Even after registering four fingerprints on mate RS, I encountered more small problems than using traditional fingerprint sensors in the past three years. In some cases, you can't unlock the phone by constantly changing the location of the phone.Therefore, I think that the optical fingerprint sensor is more vulnerable to the stains on the display screen, or because of my fingertips, or temperature changes, or other factors that need to be paid attention to in daily life. These may not be a problem when unlocking a mobile phone using a traditional fingerprint sensor.It is troublesome to use, and even if it can barely be used, the speed is unbearably slow. It is worth noting that Huawei also provides two other excellent unlocking methods in mate RS - face unlocking and fingerprint sensor on the back of the fuselage, because it will be crazy to unlock the mobile phone by using off-screen fingerprint alone.
Of course, with a starting price of $2000, Huawei and Porsche have sufficient budget room to integrate so many parts into this mobile phone. Mate RS itself is not a popular product, and the sales volume will not be large. I can't imagine that Samsung will use an off-screen fingerprint sensor in a mobile phone with a price equivalent to that of a traditional flagship mobile phone and a sales volume of tens of millions, and use a capacitive fingerprint sensor on the back of the fuselage.Android central said that in fact, almost all major flagship mobile phones have decided (or realized that the off-screen fingerprint technology is immature) to adopt the tested and mature capacitive fingerprint sensor technology, while waiting for the maturity of the off-screen fingerprint technology.To sum up, it is difficult for us not to draw such a conclusion. Even if it is not equipped with a special infrared laser array like apple face ID, the development speed of smartphone face unlocking technology is much faster than that of off screen fingerprint.
The demand for off screen fingerprint will not ebb in the short term, but the off screen fingerprint technology used in mobile phones is not mature enough to become the core part of modern smart phones. In the next two years, the speed and accuracy of fingerprint sensors in smart phones will be further improved.