Photoelectric conversion circuit, driving method thereof and display device

A technology of photoelectric conversion circuit and voltage conversion circuit, which is applied in the direction of battery circuit devices, circuit devices, electric vehicles, etc., can solve the problems of high cost and low value appeal of large-area fingerprint detection, and achieve the effect of increasing value

Pending Publication Date: 2022-07-08
SHANGHAI TIANMA MICRO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, as the area of ​​the fingerprint identification area increases, the cost also increases significantly, making the value appeal of large-area fingerprint detection not high.

Method used

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  • Photoelectric conversion circuit, driving method thereof and display device
  • Photoelectric conversion circuit, driving method thereof and display device
  • Photoelectric conversion circuit, driving method thereof and display device

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Embodiment Construction

[0033] In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Embodiments are part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] It should be noted that the terms "first", "second" and the like in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used may be interchanged under appropriate ...

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Abstract

The invention discloses a photoelectric conversion circuit, a driving method thereof and a display device. Wherein the photoelectric conversion circuit comprises a photosensitive circuit and a reading circuit, and in a first state, the photosensitive circuit is coupled to a reading node according to an electric signal converted from an optical signal; in the first state, the reading circuit is used for converting a signal of a reading node into a detection signal and outputting the detection signal in response to the control of a reading control signal end, and in the second state, the photosensitive circuit outputs an electric signal converted by the photosensitive circuit according to an optical signal through a reference voltage node so as to charge the battery. According to the photoelectric conversion circuit, the driving method thereof and the display device provided by the embodiment of the invention, fingerprint detection is carried out through the photosensitive circuit in the first state, and the battery is charged through the electric signal converted from the optical signal by using the photosensitive circuit in the second state, so that a fingerprint identification function and a charging function are realized, and the cruising ability of equipment can be improved.

Description

technical field [0001] The present invention relates to the field of display technology, and in particular, to a photoelectric conversion circuit, a driving method thereof, and a display device. Background technique [0002] Fingerprints are inherent to everyone. With the development of technology, a variety of display devices with fingerprint recognition functions have appeared on the market, such as mobile phones, tablet computers, and smart wearable devices. Before operating the display device with the fingerprint recognition function, users only need to touch the display device with their fingers to perform authorization verification, which simplifies the authorization verification process. Some areas have evolved into full-screen recognition. [0003] However, as the area of ​​the fingerprint identification area increases, the cost also increases significantly, making the value appeal of large-area fingerprint detection not high. SUMMARY OF THE INVENTION [0004] Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/00G06V40/13H02J7/35
CPCG09G3/00H02J7/35
Inventor 张波
Owner SHANGHAI TIANMA MICRO ELECTRONICS CO LTD
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