Fingerprint identification structure, fingerprint identification display device and driving method

Abstract

The invention relates to a fingerprint identification structure. The fingerprint identification structure comprises a sensing electrode arranged on a substrate, the sensing electrode comprises first sub-sensing electrodes which are insulated from one another and a plurality of second sub-sensing electrodes of which the number is the same as that of the plurality of point light sources; the plurality of photosensitive units comprise a first photosensitive sensing unit group correspondingly connected with the first sub-sensing electrodes and a second photosensitive sensing unit group correspondingly connected with the plurality of second sub-sensing electrodes; a first fixed voltage is provided for the first sub-sensing electrodes, so that photosensitive units in the first photosensitive unit group are in a working state; and the first voltage is provided for the second sub-sensing electrodes corresponding to the lighted point light source group, so that the corresponding part of the photosensitive units are in a cut-off state, and the first fixed voltage is provided for the second sub-sensing electrodes corresponding to the non-lighted point light source group, so that the other corresponding part of the photosensitive units are in a working state. The invention also relates to a fingerprint identification display device and a driving method thereof.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a fingerprint identification structure, a fingerprint identification display device and a driving method. Background technique [0002] Fingerprint recognition is a technology for identity identification by comparing the detailed feature points of different fingerprints. The fingerprints of each person are different, and the ten fingers of the same person are also obviously different, so fingerprints can be used for identification. At present, more and more terminal devices are equipped with fingerprint identification modules, and most of them adopt optical fingerprint collection. Fingerprints are not imaged in this area, and the other area is an imaging area where fingerprints can be imaged. If you want to get a complete fingerprint image, you need to fill the non-imaging area. In order to solve this problem, you can use two point light sources to achieve complementary imagin...

AI Technical Summary

Problems solved by technology

If you want to get a complete fingerprint image, you need to fill the non-imaging area. In order to solve this problem, you can use two point light sources to achieve complementary imaging, to achieve image complementation and fingerprint imaging, but because the image formed by two point light sources The middle and part of the imaging areas overlap with each other, and need to be lit in time-sharing, and because of the afterimage problem (lag) of the photosensitive sensor (sensor), when the light source is turned on for the second time, the reception of light information by the photosensitive sensor will be affected by the first point. The influence of the photosensitive sensor on the reception of light information in the case of bright light sources leads to the fact that in order to eliminate afterimages, it is necessary to wait for the second point light source to be lit to collect light information after the afterimages are over. The time is extended, and the fingerprint collection time is greatly extended

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