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Can you wait for your iPhone's fingerprint with a mask?

via:GeekPark极客公园     time:2020/11/28 21:01:16     readed:123

In a recent report, Tianfeng International Guo said Apple is expected to use optical screens next year. And he judges that from 2021 onwards, optical underscreen fingerprints will become the mainstream of the smartphone industry. In today's epidemic, the most annoying thing for Apple users, in addition to going out to remember to wear a mask, may be that wearing a mask can not "brush" smoothly.


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Not only that, becauseAppleThe AI algorithm behind faceid iterates every time you brush your face, so you may find that your faceid is becoming less and less aware of you in the face mask over and over again. Even if the mask is removed, the accuracy of recognition is declining.

And the most intuitive and understandable reason is, of course, that FaceID are more senseless technologies that do not require active user compression. When the epidemic is normalized, FaceID is no longer senseless, and even becomes the "culprit" for users to enter passwords over and over again, the iPhone 12 series still does not add off-screen fingerprinting. Can this question be explained so simply?

In order to get a deeper answer, we really talked to engineers who are engaged in mobile hardware development and those who have been watching apple for a long time. Here are our findings.

Early technical reserve

In terms of fingerprint identification, apple is the pioneer in the industry, and the representative work is touch ID, which was adopted from the iPhone 5S. But this time, in the wave of off-screen fingerprints, apple did not enter the game, or even let its technology direction toward the off screen fingerprint to do a bit of deviation.

In January 2018, vivo released the world's first mass-produced off screen fingerprint mobile phone vivo x20plus | geek park

On the surface, it seems that the iPhone x didn't get on the off screen fingerprint car, but in fact, Apple had mastered the off screen fingerprint technology before the iPhone X was launched, and it was "a long time ago".

The company acquired micro LED technology provider in 2014 LuxVue, which owns a technology patent called "interactive display panel with infrared diodes ", which points to screen fingerprint identification technology. After the acquisition of the LuxVue, Apple transferred the patent still under application to its own name. The patent was granted in February 2017.

Acquisition LuxVue isn't apple's only big move on screen fingerprinting. Search the Google Patents for "screen""fingerprint" keywords" under Apple's name and get 20 results.

It's not hard for Apple to make a fingerprint under the screen. Apple chose the FaceID rather than the off-screen fingerprint scheme, mainly because of the immaturity of the early off-screen fingerprint technology.

An engineer who has been deeply involved in testing vivo's off screen fingerprint module told geek park that in the early days, 3D face recognition was far more secure than off screen fingerprints, which was the first reason Apple didn't adopt the off screen fingerprint scheme.

Security is the first priority

At that time, there were two mainstream offline fingerprint schemes, one is optical offline fingerprint technology represented by Synaptics and Huiting technology, the other is ultrasonic offline fingerprint technology represented by Qualcomm.

The former is a common technology adopted by domestic android manufacturers at that time. Its advantages are low cost and can be recognized by wet hands. The disadvantage is that it can only be recognized when the screen is turned on with the highest brightness. The latter does not need the highest brightness, higher security, but can not be wet hand recognition, user experience is not good, and the cost is higher.

It can be seen that either scheme was not perfect at that time. Moreover, in addition to the cost and user experience, there was a fatal problem of off screen fingerprint technology at that time, which Apple was most concerned about, which was security.

Imagine the touch ID technology before faceid. The principle of touch ID is to unlock the device by capacitance, which requires organisms with micro current to recognize it. However, neither of the above-mentioned two off-screen fingerprint identification technologies are living detection. When the off-screen fingerprint identification mobile phone was just launched, there were even funny security incidents such as orange peel unlocking, which was obviously not acceptable to apple.

Security and privacy are officially listed as the highest priority of apple, as can be seen from the fact that Apple does not allow the U.S. government to monitor and crack the iPhone. Apple even refused to allow its Siri team to collect host information because of privacy protection. In the face of product iteration and optimization, apple chose to protect user privacy.

Under such a product design philosophy, apple chose faceid technology, which is more expensive but can be detected in vivo. It can identify the owner of the machine through the micro movement of facial muscles, even if wearing a 1:1 simulation mask, it can not be cracked, ensuring the safety of user information.

In addition, FaceID undertake not only screen unlock a function, but also customized emoji and other software functions. As a result, while the bangs D 3 modules cost as much as 2-6 times as much as the underscreen fingerprint module, apple thinks it can still be worth the fare. Because the bet on the above, is the software ecology more play.

How will masks change apples?

Today, when offline fingerprints become one of the most enviable features of Android users, will Apple change?

First of all, the primary reason why Apple didn't choose off screen fingerprints has not been overcome. The above engineer, who was deeply involved in the test of the fingerprint module under the vivo screen, told geek park that after several years of development, the security of off screen fingerprint has been greatly improved. However, the off screen fingerprint technology is still unable to identify the living body.

If the fingerprint identification function is added on the basis of faceid, it means that the security is reduced. After all, the security of the whole mobile phone depends on the unlocking method with lower security level.

Secondly, the current off-screen fingerprint identification module needs to occupy a large space in the fuselage, and because of its thickness, the existence of such modules often occupies the volume of the battery, but compared with the single-point user experience such as "unlocking ", Duration is the most basic evaluation parameter of mobile phone.

Also, although the cost of the off-screen fingerprint identification module is low, the price will still rise by hundreds of yuan in terms of iPhone profit margins and delivery to end consumers.

The common fingerprint recognition module under the optical screen is composed of an image module and an independent chip

According to a long-term observer of apple, apple probably won't consider adding fingerprint function under the screen, because its design philosophy is to be as simple as possible, not complex. "As long as apple has a way, press the home button to return to the desktop forever, and the faceid is good enough to let users use it all the time."

What's more, Apple has a strong enough product matrix to support it. Without a fingerprint on the screen, it is easier for FaceID to unlock Apple Watch because the mask is not so bright than to plug a hardware module into your phone.

Apple Watch can unlock Mac, let it unlock iPhone let alone technical barriers. Bluetooth and NFC can be done, but Apple hasn't done it, and it's essentially confident in FaceID ," the source said.

"If the epidemic really lasts for a long time and eventually transforms European and American countries into countries with" mask culture "like Japan and South Korea, then Apple may consider adding fingerprints under the screen, otherwise Apple will not change."

As in previous years, espionage on apple's next-generation machine is being exposed at a rate of several a day. But as in previous years, these rumors were finally falsified when the new machine was released.

Recently, the news of Apple's fingerprint patent exposure appeared again. However, for all the reasons mentioned above, it seems that another sound is more "reliable" - side fingerprint recognition.

According to DIGITIMES, apple is likely to change its iPhone fingerprint recognition function to the side design of its mobile phone, according to DIGITIMES. Moreover, according to the news from the supply chain side of the Taiwan system, the andorid camp brands have begun to follow suit. In the fourth quarter, several brand mobile phone manufacturers have changed the design of new phones in the first half of 2021 to the right fingerprint identification.

And perhaps to supplement the FaceID during the outbreak, apple would walk back to the "safe path" of capacitor-based microcurrent identification ".

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