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Fingerprint light current detection unit, fingerprint recognizer, driving method and display device

A technology for photocurrent detection and fingerprint reader, which is applied in the acquisition/organization of fingerprints/palmprints, electrical components, electrical solid devices, etc. high intensity effect

Inactive Publication Date: 2017-03-01
BOE TECH GRP CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a fingerprint photocurrent detection unit, a fingerprint reader, a driving method and a display device to solve the problem that the existing fingerprint photocurrent detection method directly detects the fingerprint photocurrent, the signal strength is low, and it is easily disturbed by noise. question

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  • Fingerprint light current detection unit, fingerprint recognizer, driving method and display device
  • Fingerprint light current detection unit, fingerprint recognizer, driving method and display device
  • Fingerprint light current detection unit, fingerprint recognizer, driving method and display device

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Embodiment Construction

[0059] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0060] Such as figure 1 As shown, the fingerprint photocurrent detection unit described in the embodiment of the present invention includes:

[0061] The conversion circuit 11 is connected to the fingerprint photocurrent reading line RL, and is used to convert the fingerprint photocurrent read by the fingerprint photocurrent reading line RL into a corresponding square wave signal; and,

[0062] The detection circuit 12 is connected with the conversion circuit...

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Abstract

The present invention provides a fingerprint light current detection unit, a fingerprint recognizer, a driving method and a display device. The fingerprint light current detection unit includes a conversion circuit and a detection circuit; the conversion circuit is connected with a fingerprint light current reading line and is used for converting the fingerprint light current of the fingerprint light current reading line into corresponding square wave signals; and the detection circuit is connected with the conversion circuit and is used for detecting the square wave signals and obtaining fingerprint light current information based on the frequency of the square wave signals. According to the fingerprint light current detection unit, the fingerprint recognizer, the driving method and the display device of the invention, the fingerprint light current of the fingerprint light current reading line is converted into corresponding square wave signals through the conversion circuit, namely, an electrical physical quantity-to-frequency detection conversion process of fingerprint light current detection can be realized; and a frequency detection mode is adopted, and therefore, signal strength is high, and the fingerprint light current detection unit has little possibility of being interfered by noises.

Description

technical field [0001] The invention relates to the technical field of fingerprint photocurrent identification, in particular to a fingerprint photocurrent detection unit, a fingerprint identifier, a driving method and a display device. Background technique [0002] In recent years, with the rapid development of technology, mobile products with biometric functions have gradually entered people's life and work. Fingerprint technology has attracted much attention due to its unique identity. Push-type and slide-type fingerprint recognition technologies based on silicon-based technology have been integrated into mobile products. In the future, the core of people's attention will be the fingerprint recognition technology in the display area. [0003] In the existing fingerprint current identification circuit, each fingerprint sensor is composed of a photodiode and a switching transistor. When scanning fingerprints, due to the difference between the valleys and ridges of the fing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06F3/041
CPCG06F3/0412G06V40/1318H01L27/14678G06F2218/08H01L27/1222H01L29/78672
Inventor 丁小梁董学吕敬王海生吴俊纬刘英明刘伟王鹏鹏韩艳玲曹学友
Owner BOE TECH GRP CO LTD
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