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Black screen fingerprint unlocking device and method applied to liquid crystal display screen, and electronic equipment

A liquid crystal display and fingerprint unlocking technology, which is applied in the electronic field and can solve problems such as the inability to realize fingerprint unlocking

Pending Publication Date: 2020-06-09
BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the liquid crystal molecules of the LCD screen have been flipped when the screen is bright, infrared light can completely penetrate, so fingerprint unlocking can be realized; while in the black screen state, the thin film transistors of the LCD screen are all turned off, and the liquid crystal molecules do not flip, so it cannot be unlocked. Realize fingerprint unlocking

Method used

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  • Black screen fingerprint unlocking device and method applied to liquid crystal display screen, and electronic equipment
  • Black screen fingerprint unlocking device and method applied to liquid crystal display screen, and electronic equipment
  • Black screen fingerprint unlocking device and method applied to liquid crystal display screen, and electronic equipment

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Embodiment Construction

[0022] Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0023] figure 1 A schematic block diagram showing a black-screen fingerprint unlocking device applied to a liquid crystal display according to an embodiment of the present disclosure, as shown in figure 1 As shown, the device 1 includes: a detection circuit 11 for detecting whether the liquid crystal display screen is in a black screen state; a plurality of array substrate row drive circuits 12, wherein the scanning range of the plurality of array substrate row drive circuits 12 covers fingerprints When the detection circuit 11 detects that the liquid crystal display screen is in the black screen state, the array substrate row drive circuit in the unlocking ...

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Abstract

The invention relates to a black screen fingerprint unlocking device and method applied to a liquid crystal display screen, and electronic equipment. Fingerprint unlocking can be achieved in the blackscreen state of the liquid crystal display screen. The device comprises: a detection circuit used for detecting whether the liquid crystal display screen is in a black screen state or not; a plurality of array substrate row driving circuits, wherein the scanning range of the array substrate row driving circuits covers a fingerprint unlocking area, a local scanning mode is started to scan the fingerprint unlocking area when the detection circuit, where the array substrate row driving circuits locate, detects that the liquid crystal display screen is in the black screen state; and a touch sensor which is used for triggering a source line, located in the fingerprint unlocking area, of the liquid crystal display screen to display a highlight mode when a finger is sensed.

Description

technical field [0001] The present disclosure relates to the field of electronic technology, in particular, to a black screen fingerprint unlocking device, method and electronic equipment applied to a liquid crystal display. Background technique [0002] Currently, for LCD screens, 840nm or 950nm infrared light is used for fingerprint unlocking. Since the liquid crystal molecules of the LCD screen have been flipped when the screen is bright, infrared light can completely penetrate, so fingerprint unlocking can be realized; while in the black screen state, the thin film transistors of the LCD screen are all turned off, and the liquid crystal molecules do not flip, so it cannot be unlocked. Realize fingerprint unlocking. Contents of the invention [0003] The purpose of the present disclosure is to provide a black-screen fingerprint unlocking device, method and electronic equipment applied to a liquid crystal display, which can realize fingerprint unlocking in a black-scree...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06F21/32G06F3/041G09G5/10G02F1/1333
CPCG06F21/32G06F3/0416G09G5/10G02F1/13338G06V40/1318
Inventor 胡现坤唐矩王刚
Owner BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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