The screen fingerprint recognition technology on smartphones today has to be on your list of must-haves if you want to choose among several cutting-edge features. Screen fingerprint recognition technology is significant because it modifies the design of full-screen mobile phones in addition to providing a new method of interaction unlocking. Currently available fingerprint recognition technologies fall into three categories: ultrasonic, optical screen, and capacitive. What distinguishes the three forms of fingerprint recognition from one another? In this blog, we'll talk about the three main methods for fingerprint recognition.

 

Three Fingerprint Recognition Principles

 

Capacitive Fingerprint Recognition

First of all, the traditional capacitive fingerprint recognition technology should be no stranger to us, before the advent of the full-screen mobile phone era, almost all mobile phone fingerprint recognition technology is capacitive fingerprint recognition. Capacitive fingerprint recognition technology has been developed for many years, and it can be said that it is quite mature, whether it is recognition speed or accuracy. The principle is to use the silicon wafer to form an electric field when it is in contact with the electrolyte on our skin, and the fingerprint is uneven at the micro level (invisible to the naked eye), at this time the sensor can record the shape of the fingerprint for unlocking. There is no small difficulty in transferring capacitive fingerprint recognition to the screen because its penetration is too poor to make it seem out of place in the era of full screen.

 

Optical Fingerprint Recognition

When it comes to the application of optical recognition is very common, for example, our daily commute card machine or access control, etc., all use optical fingerprint recognition technology, the principle is the use of light refraction and reflection. When the finger presses on the screen, the OLED screen emits light to illuminate the finger area, and the reflected light that illuminates the fingerprint returns through the gaps in the screen pixels to the sensor close to the screen. The fingerprint image obtained is compared with the image entered by the mobile phone for the first time, and finally, the identification is made. In addition, because the LCD screen cannot self-light, the current products that support fingerprint recognition under the optical screen are using OLED screens. Moreover, the OLED screen has the characteristics of self-illumination, flexibility, and thin thickness, which is a strong support for fingerprint recognition technology under the optical screen. Fingerprint recognition under the optical screen can effectively avoid the interference of ambient light and has better stability performance in complex environments.

 

Ultrasonic Fingerprint Recognition

The realization principle is inextricably linked to the technology since it is ultrasonic fingerprint recognition. Because ultrasonic waves have penetration, the fingerprint module's specific frequency of ultrasonic waves scans the finger, and the fingerprint's varied reflections on the ultrasonic wave can be used to establish a 3D image, the principle of ultrasonic fingerprint recognition differs from that of capacitive fingerprint recognition. Sense ID is a very general-purpose ultrasonic fingerprint recognition system that has minimal cleanliness requirements for the finger surface. Wet hand unlocking is possible without opening the screen panel or pressing any buttons. Conversely, the HONOR 10 is an Ultrasonic Fingerprint with superior unlocking power.

 

Conclusion

No matter what kind of smartphone you are holding, knowing the screen fingerprint recognition technology on smartphones will help your choosing one day.Ultrasonic Fingerprint is the best one among the three Fingerprint unlocking technologies, which can give users a more convenient experience. You may wish to buy a mobile phone with Ultrasonic Fingerprint technology to use it.