An imaging backplane, its driving method, and a fingerprint identification panel

Abstract

An imaging backplane and its driving method, and a fingerprint recognition panel, wherein the imaging backplane includes: M rows and N columns of imaging structures, 2M rows of first signal lines, 2N columns of second signal lines, a first reset sub-circuit and a second Two reset sub-circuits; each imaging structure includes: a first imaging unit and a second imaging unit; the first reset sub-circuit is respectively connected to the first reset terminal, the low-level power supply terminal and the second signal lines of all odd columns, Under the control of the first reset terminal, provide a low-level signal to the second signal lines of all odd columns to reset the first imaging unit; the second reset sub-circuit is connected with the second reset terminal and the low-level power supply respectively The terminal is connected to the second signal lines of all even columns, and is used to provide a low level signal to the second signal lines of all even columns under the control of the second reset terminal, so as to reset the second imaging unit. The embodiments of the present application can eliminate afterimages and reduce the lighting time interval of point light sources, thereby reducing the time for fingerprint recognition.

Description

technical field [0001] This article relates to the field of imaging technology, and specifically relates to an imaging backplane, a driving method thereof, and a fingerprint identification panel. Background technique [0002] Fingerprint identification refers to identity identification by comparing the detailed feature points of different fingerprints. Because everyone's fingerprints are different, even between the ten fingers of the same person, there are obvious differences in fingerprints, so fingerprints can be used for identification. Point light source imaging is an implementation of fingerprint recognition. The point light source imaging in the related art is mainly realized by two point light sources and a photoelectric sensor. Its working principle is: two point light sources are highlighted in time-sharing, the light from the point light source is directed to the finger, and the photoelectric sensor receives the light reflected by the finger to identify the finger...

AI Technical Summary

Problems solved by technology

[0003] The inventors found that, due to the problem of residual image in the photoelectric sensor, in order to eliminate the residual image, it is necessary to turn on the second point light source after the residual image generated after the first point light source is turned on disappears, which will lead to two points. The lighting time interval of the light source is long, which makes the fingerprint recognition time too long

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