A texture recognition device, array substrate and display device

Abstract

The invention discloses a pattern identification device, an array substrate and a display device. Two reflective slopes are used to form an optical path selector, which can reflect the pattern light at a certain angle to the surface of the pattern identification device to a photosensitive diode in a photosensitive structure, and The first light-shielding electrode and the second light-shielding electrode stacked with the photodiode in the photosensitive structure are both opaque, and only the first light-shielding electrode is provided with an opening area, so the pattern light can only be irradiated to the photodiode from the opening area. In this way, when the texture is far away from the photosensitive structure, it can be ensured that the reflected light of the valley and ridge in the texture will not be mixed in the photosensitive structure, so that the texture can be recognized with high definition, which is beneficial to the integration of the texture recognition device and the display device . Since the optical path selector is composed of two reflective slopes with a relatively simple structure to achieve the function of filtering the angle of the line light, there is no need to set a light collimation device or optical fiber with a complicated process in the line recognition device, and it is easy to mass produce.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a texture recognition device, an array substrate and a display device. Background technique [0002] Fingerprints are invariable features of the human body that are inherently unique and distinguishable from others. It consists of a series of ridges and valleys on the surface of the skin on the fingertips. The compositional details of these ridges and valleys usually include details such as ridge forks, ridge ends, arches, tent-like arches, left-handed, right-handed, spiral or double-handed, etc., which determine the uniqueness of the fingerprint pattern. The fingerprint identification technology developed from it is used as a personal identity verification technology earlier. According to different ways of fingerprint collection and input, it is widely used and well-known at present: optical imaging, thermal sensors, human far-infrared sensors, etc. . Among them, optical fin...

AI Technical Summary

Problems solved by technology

[0004] In view of this, an embodiment of the present invention provides a texture recognition device, an array substrate, and a display device to solve the problem that the valleys and ridges of the texture obtained by the existing texture recognition device are easily mixed with light, which makes it difficult to clearly distinguish the texture.

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