Pixel circuit and driving method thereof, array substrate and display device
A pixel circuit and level technology, which is applied in the fields of array substrates, pixel circuits and their driving methods, and display devices, can solve the problems of reduced fingerprint recognition accuracy, low fingerprint signal-to-noise ratio, and poor customer experience, so as to improve accuracy, Improve the signal-to-noise ratio and enhance the effect of customer experience
Pending Publication Date: 2020-11-20
BOE TECH GRP CO LTD
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Problems solved by technology
[0004] In view of the shortcomings of the existing methods, the present application proposes a pixel circuit and its driving method, an array substrate, and a display device to solve the problem of lower fingerprint recognition accuracy and customer experience caused by the low signal-to-noise ratio of fingerprints in the prior art. Poor technical issues
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[0058] The present application is described in detail below, and examples of embodiments of the present application are shown in the drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. Also, detailed descriptions of known technologies will be omitted if they are not necessary to illustrate the features of the present application. The embodiments described below by referring to the figures are exemplary only for explaining the present application, and are not construed as limiting the present application.
[0059]Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meanings as commonly understood by those of ordinary skill in the art to which this application belongs. It should also be understood that terms, such as those defined in commonly used dictionaries, should be u...
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The embodiment of the invention provides a pixel circuit and a driving method thereof, an array substrate and a display device. The pixel circuit comprises: a sensing unit, wherein a first end and a second end of the sensing unit are electrically connected with a first level end and a first node respectively; a first switch unit, wherein a first end, a second end and a control end of the first switch unit are electrically connected with the first node anda second node and a first control signal line respectively, the first switch unit is used for the first node to change a first level difference as a first fingerprint signal in a fingerprint information acquisition stage, the second node changes a second level difference to serve as a second fingerprint signal in a fingerprint informationconversion stage, and the second level difference is greater than the first level difference; a signal output unit, wherein the first end, the second end and the control end of the signal output unitare electrically connected with the second level end, the detection signal line and the second node respectively, and the second end is used for outputting a fingerprint detection signal obtained based on second fingerprint signal conversion. According to the pixel circuit disclosed in the embodiment of the invention, the signal-to-noise ratio of the fingerprint can be improved, thereby improvingthe fingerprint recognition precision, and improving the customer experience.
Description
technical field [0001] The present application relates to the technical field of fingerprint detection, and in particular, the present application relates to a pixel circuit and a driving method thereof, an array substrate, and a display device. Background technique [0002] With the development of display technology, fingerprint identification technology is widely used in display devices, which provides a strong security guarantee for the display devices. [0003] However, the fingerprint identification of the existing display device has the problem of low signal-to-noise ratio of the obtained fingerprint, especially in special environments such as strong light or dry fingers or low temperature environment, which reduces the accuracy of fingerprint identification and makes the customer experience worse. Difference. Contents of the invention [0004] In view of the shortcomings of the existing methods, the present application proposes a pixel circuit and its driving metho...
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IPC IPC(8): G06K9/00
CPCG06V40/1306
Inventor 李昌峰陈小川李付强王世君穆文凯刘立伟王迎姿李秀真
Owner BOE TECH GRP CO LTD