Since the advent of the iPhone X in 2017, the mobile phone circle has ushered in a wave of facial recognition frenzy. Compared with fingerprint recognition technology, facial recognition has certain advantages in both security and convenience. But when the manufacturers have followed up on the new machine after the face recognition, everyone is forced to develop the habit of wearing a mask, in this environment, face recognition is extremely inconvenient, people remember the fingerprint recognition is good.
Common fingerprint recognition is divided into capacitive fingerprint recognition, optical fingerprint recognition and ultrasonic fingerprint recognition. Among them, capacitive fingerprint recognition is basically difficult to see in the era of full screen, so it is not too much introduction. Today, we mainly talk about the difference and difference between optical fingerprint recognition and ultrasonic fingerprint recognition that support off-screen fingerprint recognition.
01 Basic technical principles
Optical fingerprint recognition
First of all, let's first make a simple understanding of the principle of these two fingerprint recognition methods. Optical fingerprint recognition is the use of light refraction and reflection principle, when the finger is pressed on the screen recognition area, the screen emits light to illuminate the fingerprint area, and then the light reflection through the screen pixels back to the sensor under the screen, and the image entered by the mobile phone for comparative recognition judgment.
Principle of optical fingerprint recognition
Ultrasonic fingerprint recognition
Different from optical fingerprint recognition, ultrasonic fingerprint recognition is based on the principle of drawing fingerprint sound waves based on the pressure reading of the skin reflected sound waves. Thanks to the penetration of the ultrasonic, there are not too many requirements for the details of the fingerprint surface, even in the state of staining or wet hands, which can be recognized. And because ultrasonic fingerprint recognition draws out the three-dimensional details of the fingerprint, the fingerprint pattern drawn is more secure and accurate.
Principle of ultrasonic fingerprint recognition
Although ultrasonic fingerprint recognition has more advantages in security and accuracy than optical fingerprint recognition, it is slightly better than ultrasonic fingerprint recognition in terms of cost and yield rate. However, cost and yield rate are not the content that users need to consider, so for users, ultrasonic fingerprint recognition has an absolute advantage over optical fingerprint recognition in the use experience.
02 Ultrasonic fingerprint recognition experience
In order to better demonstrate the excellent experience of ultrasonic fingerprint recognition, we found the just released iQOO 9 Pro for actual testing, first of all, we carried out a wet hand unlock test.
We sprinkle water droplets on the screen to simulate the wet hand state, through gifs can see, fingers through a small beach of water can also easily unlock the phone, it is worth noting that in the daily life of the wet hand state is not possible to reach the degree of a beach of water in the simulated state, but this does not affect the unlock speed of the phone, it can be seen that ultrasonic fingerprint unlocking for the dryness of the fingers is not strict requirements.
Wet Hand Unlock iQOO 9 Pro
And in the actual experience, personal feeling that ultrasonic fingerprint recognition has certain advantages over optical fingerprint recognition in terms of unlocking speed. For a more intuitive presentation, we use the iQOO 9 Pro with ultrasonic fingerprint recognition and the Xiaomi Mi 12 with optical fingerprint recognition for a comparison.
While both are fast to unlock, the iQOO 9 Pro is clearly slightly better.
iQOO 9 Pro and Xiaomi Mi 12
In addition, in the process of experience, I also found that the iQOO 9 Pro not only uses ultrasonic fingerprint recognition, but also uses "wide area" ultrasonic fingerprint recognition. Thanks to the blessing of "wide area", the fingerprint unlock of iQOO 9 Pro not only has a more "wide" coverage area, but also can do some articles within the scope of fingerprint unlocking.
iQOO 9 Pro custom adjustment fingerprint area
With a large fingerprint area and the new OriginOS Ocean, iQOO 9 Pro can use the fingerprint area to unlock the fingerprint area to quickly enter the application or shortcut on the lock screen.
Taking my personal usage habits as a simple example, I will place the two high-frequency functions of health treasure and payment code in the fingerprint unlock area, and in the required scenarios, fingerprint recognition can be directly connected to improve the efficiency of use.
One-click direct access to the payment code
In addition to this, the wide-area fingerprint area not only brings more convenient features, but also means that more information can be obtained at once when entering fingerprints, so that the iQOO 9 Pro only needs to press once when entering fingerprints.
iQOO 9 Pro enter fingerprints
Compared with the optical fingerprint recognition that requires the user to enter the fingerprint with a dozen times at various angles to complete the work, the larger unlocking area makes the accuracy and security of the iQOO 9 Pro well guaranteed.
03 Summary
Thanks to the wide-area ultrasonic fingerprint unlock, iQOO 9 Pro has played a new trick on the fingerprint unlock, and after a few days of experience, I have a feeling that I can't go back after using it. After the actual comparative test, it is not difficult to find that ultrasonic fingerprint recognition does have certain advantages over optical fingerprint recognition, but why is ultrasonic fingerprint not popularized? It is nothing more than the control of costs by other manufacturers and the user does not understand the ultrasonic fingerprint, and there is no corresponding demand. iQOO is a good start, when users gradually become familiar with and issue corresponding needs, naturally more manufacturers will be willing to follow.
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