If you sum up the 2017 smartphone in one word, you can basically use the 'full screen' to summarize the popularity of the full screen, but also brought a fingerprint recognition 'open the reversal of history.' Whether it is forced to defeat the group behind the fingerprints, Or Face ID, the experience is not satisfactory. The key lies in the long-awaited but still unsolved problem of 'under the fingerprints' CES, there is not much about the part of the smart phone, but vivo The joint release with Synaptics for the production version of the in-screen fingerprint countdown is the heaviest highlight of the year of 2018. Therefore, today's flight observation room came to talk about vivo as a screen-to-screen fingerprint Identification technology.
In fact vivo for fingerprinting perseverance has long been a secret.As early as 2017 MWC Shanghai show, vivo on the outside to show the vivo Xplay 6 as a prototype, using Qualcomm second-generation ultrasonic fingerprint technology solutions. And This release at CES is based on vivo X20 Plus prototype, the use of new thinking optical fingerprint solution.
First of all, why vivo will be released twice a year in the same path with the same purpose technology?
▲ vivo previously released ultrasonic fingerprint
Here you need to first understand the difference between ultrasonic fingerprints and optical fingerprints: Ultrasound is a kind of RF fingerprints, due to the penetration of ultrasound, so at work, the use of the fingerprint module to send a specific frequency ultrasound scanning finger, according to different fingerprint pairs Different ultrasonic reflections, the establishment of 3D fingerprint graphics, fingerprint templates in advance compared with the unlock.
▲ This release of optical fingerprint (picture from theverge)
The optical fingerprint is the use of mobile phone screen as the main body of light through the light path to the fingerprint, the returned light through the screen back to the screen under the CIS (CMOS Image Sensor), the phone for the returned images and database analysis and comparison, the final identification fingerprint.
So we can see that with the solution of in-display, optical fingerprint is more advantageous than ultrasonic fingerprint in product cost and yield, so I also speculate that vivo should be the same for two programs Go hand in hand, and finally according to the actual situation, the final choice of optical fingerprint as the first choice for mass production.
In fact, the optical fingerprint is not so far away from us, for example, in the first fingerprint punch card machine, is the earliest optical fingerprint technology.After entering the original fingerprint information, through the glass under the laser emitted your finger 摁Press out the glass Fingerprint, scanned images are compared with the database in black and white images, while in smart phones, because the optical fingerprint needs to hit the fingerprints on the fingerprint, the screen time, power consumption, and the cleanliness of the screen surface will affect To the application of optical fingerprint experience, it is only temporarily applied to the development of the OLED screen.
Vivo X20 Plus screen fingerprint using Synaptics (Synopsys) FS9500 fingerprint recognition module can be directly encapsulated in the AMOLED screen module, using the same standard OLED and optical materials and processes.According to vivo display package level , Followed by the screen saver glass, AMOLED stack layer + fingerprint recognition sensor, fingerprint recognition module PCB.Because the fingerprint recognition sensor and the AMOLED stack layer together, the use of gaps between the OLED pixels for fingerprint scanning, collecting some Fingerprinting the key points to unlock, so you can see that the current optical fingerprint can only OLED material.
There are some small questions:
Optical fingerprint how the actual experience?
The actual experience, the accuracy of optical fingerprint recognition and capacitive almost the same, but the time of entry than the capacitive to be slower, and the recognition speed of about 0.6-0.7 seconds, compared to the current traditional capacitive fingerprint recognition 0.2-0.3 seconds The time is still nearly doubled. This can only wait for technical progress slowly optimized.
Foil will affect fingerprinting it?
Optical fingerprint is mainly sensitive to light because of its connection with sensors and fingerprints when it works.Generally, the cell phone film will have an impact on the light due to the additional layer of material between the screen and the finger , Thus affecting the rate and accuracy of fingerprinting.However, we do not have to worry too much, vivo has said that in the development of a dedicated mobile phone film, the official sale should have a solution to the problem.
Traditional capacitive fingerprinting finger and cell phone cleanliness requirements, optical fingerprinting it?
As mentioned above, because the optical fingerprint needs to hit the fingerprint on the light, the image is formed and then returned to the fingerprint recognition sensor. Therefore, compared with the traditional capacitive type, the optical fingerprint has higher requirements on the cleanliness of the screen surface of the mobile phone.
Optical fingerprint security how?
Whether it is optical fingerprint or capacitive fingerprint, the fingerprint data storage is the same, and we tangle point mainly in the recognition of the moment of security, as Andrews Face Recognition Compared Face ID. And for this, the new thinking Fingerprint recognition module using unique artificial intelligence technology to detect fingerprint image, so as to distinguish true and false finger anti-cheat algorithm technology; and support both TLS protocol, ECC authentication and AES encryption, to ensure the authenticity and security of the sensor to the PCB back to the data And vivo said that the security level of fingerprints under the screen fingerprint is no different, but also to achieve payment-level security, while the specific combination with the software will be completed in the follow-up.
to sum up:
For vivo, we are more familiar with the blue and white streets and lanes, more affectionate is the title of the variety show, a strong marketing, we often look at a strange look at vivo and its products, even in the first mass production screen fingerprint When there is a trace of doubt: why is it him?
Perhaps this is just a way to express surprise and emotion, but not malicious, but it is undeniable that we have put on colored glasses to look at things, accustomed to vivo is what we think of vivo. In fact, you think that only stay In the appearance .Review In the past, the first domestic 2K screen products is from vivo, its HiFi attainments leading the industry, and now has become the world's first production of the screen under the fingerprints, vivo technology investment in the ongoing implementation of the product .
In this era, pick up the keyboard to play a few words far more than really do one thing more and more.We rely on the stereotype of the mind, unconsciously to get used to the outside world to paste a different label, such as the XX brand is XX, XX brand is XX. People are always willing to believe what they believe, and selectively ignore some facts. To be honest, it is time to take off your glasses to re-understand the vivo.