Display screen for supporting full screen optical fingerprint sensor and manufacturing method thereof

Abstract

The invention relates to a display screen for supporting a full screen optical fingerprint sensor and a manufacturing method thereof. The display screen comprises a display module and an optical fingerprint sensor module which are mounted in a superimposed manner; fingerprint information collection is carried out in a fixed region or all regions of the display screen by use of an optical fingerprint sensor, and is not limited to a capacitive fingerprint sensor. The capacitive fingerprint sensor can only be set in a non-display region, influences a screen ratio and cannot realize full screen display. Compared with the existing optical fingerprint sensor, the display screen does not need an independent lighting source, reduces the complexity and the integration difficulty of a sensor, does not need to modify a manufacturing process of the display screen or periodically lighten a lighting circuit, is convenient to implement, saves power, can be arranged at any position of the display screen or completely covers the display region of the display screen, can realize fingerprint identification of the full screen and contributes to fingerprint identification of electronic equipment in full screen display.

Description

technical field [0001] The invention relates to the technical field, in particular to a Background technique [0002] At present, there are three main ways of fingerprint identification: capacitive sensor, optical image sensor, and ultrasonic sensor. Each of the three methods has advantages and limitations. [0003] Electronic devices emphasize screen-to-body ratio, but capacitive fingerprint sensors and ultrasonic fingerprint sensors, due to technical implementation problems, can only be installed on the front, side, or back of electronic devices at present. When they are installed on the front, they are generally installed on the display screen The bottom of the screen occupies the area of ​​the front of the electronic device and cannot be full screen. [0004] The advantages of capacitive sensors are low cost, high reliability, and fast recognition speed. The first problem is that the current resolution is low (500-600pi), which affects the accuracy of fingerprint recog...

AI Technical Summary

Problems solved by technology

[0003] Electronic devices emphasize screen-to-body ratio, but capacitive fingerprint sensors and ultrasonic fingerprint sensors, due to technical implementation problems, can only be installed on the front, side, or back of electronic devices at present. When they are installed on the front, they are generally installed on the display screen below, occupying the area of ​​the front of the electronic device, cannot achieve full screen

[0004] The advantages of capacitive sensors are low cost, high reliability, and fast recognition speed. The first problem is that the current resolution is low (500-600pi), which affects the accuracy of fingerprint recognition, and it is easy to deceive the sensor by fraud. Penetrating the display screen needs to occupy the front area of ​​the electronic device outside the screen, which affects the screen-to-body ratio, while the capacitive fingerprint sensor arranged on the side and back has the problems of small recognition area and poor human-computer interaction experience

However, the ultrasonic fingerprint sensor also has the disadvantages of large size and high cost. Ultrasonic waves cannot effectively penetrate the display module composed of multiple layers of different materials, and cannot be used in terminals with full-screen display as a front fingerprint recognition solution.

[0006] Traditional optical fingerprint sensors need to use focusing lenses and beam-splitting prisms for focusing and optical path adjustment. These optical devices are bulky and cannot be used in mobile terminal devices

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