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Fingerprint identification circuit, working method thereof, display panel and display device

A fingerprint recognition and fingerprint technology, which is used in character and pattern recognition, acquisition/organization of fingerprints/palmprints, and print image capture, etc., can solve the problems of poor recognition effect, low signal-to-noise ratio, and difficult fingerprint recognition.

Active Publication Date: 2020-04-03
XIAMEN TIANMA MICRO ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention provides a fingerprint identification circuit and its working method, a display panel and a display device to solve the problem of fingerprint identification caused by the low signal-to-noise ratio and poor anti-noise ability of the fingerprint identification circuit in the prior art. Problems with high difficulty and poor recognition effect

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  • Fingerprint identification circuit, working method thereof, display panel and display device
  • Fingerprint identification circuit, working method thereof, display panel and display device
  • Fingerprint identification circuit, working method thereof, display panel and display device

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Embodiment Construction

[0030] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0031] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0032] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the description.

[0033] In all examples shown and discussed herein, any specific values ​​should be construed as exemplary only, and not as limitations. Therefore, other instances of the exemplary embodiment may have dif...

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Abstract

The invention discloses a fingerprint identification circuit, a working method thereof, a display panel and a display device, and belongs to the technical field of display. The fingerprint identification circuit comprises a fingerprint identification unit, a comparison unit and a selection unit, wherein the selection unit provides a fingerprint current signal to a fingerprint current output end, and also provides a reference current signal to a reference current output end, and the fingerprint identification signal is read according to the difference between the fingerprint current signal andthe reference current signal. The working method of the fingerprint identification circuit comprises a signal reset stage, a signal detection stage and a signal reading stage. The display panel comprises the fingerprint identification circuit. The display device comprises the display panel. According to the fingerprint identification circuit, the interference signal and the fingerprint signal aresimultaneously output at the same time and then deducted, so that the situation that other variables are possibly introduced when the fingerprint signal is read at different time points is avoided, and the signal-to-noise ratio of the fingerprint identification signal can be improved, and the anti-interference capability is enhanced, and the fingerprint identification effect is improved.

Description

technical field [0001] The present invention relates to the field of display technology, and more specifically, to a fingerprint identification circuit and its working method, a display panel and a display device. Background technique [0002] Fingerprint is an invariable feature that is unique and distinguishable from others. It consists of a series of ridges and valleys on the skin surface of the fingertips. The details of these ridges and valleys usually include the bifurcation of ridges, the Details such as ends, arches, tented arches, left-handed, right-handed, helical or double-handed, these details determine the uniqueness of the fingerprint pattern. With the rapid development of display technology, display panels with fingerprint recognition functions have gradually spread in people's lives. Fingerprint recognition is widely used in the display screens of mobile phones, personal digital assistants, computers and other electronic devices, thus enriching the display sc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06V40/1318
Inventor 蓝学新蔡选宪刘博智陈国照
Owner XIAMEN TIANMA MICRO ELECTRONICS
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