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Texture detection circuit, charging circuit and driving method, touch display panel

A charging circuit and detection circuit technology, applied in circuit devices, battery circuit devices, electrical components, etc., can solve the problem of low utilization rate of photodiodes, and achieve the effects of improving battery life, reducing power demand, and improving utilization rate.

Active Publication Date: 2021-05-07
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the utilization rate of photodiodes in the touch display panel is low

Method used

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  • Texture detection circuit, charging circuit and driving method, touch display panel
  • Texture detection circuit, charging circuit and driving method, touch display panel
  • Texture detection circuit, charging circuit and driving method, touch display panel

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Embodiment Construction

[0063] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0064] The transistors used in all the embodiments of the present invention can be thin film transistors or field effect transistors or other devices with the same characteristics, and the transistors used in the embodiments of the present invention are mainly switching transistors according to their functions in circuits. Since the source and drain of the switching transistor used here are symmetrical, the source and drain are interchangeable. In the embodiment of the present invention, the source is referred to as the first stage, and the drain is referred to as the second stage. According to the form in the accompanying drawings, it is stipulated that the middle terminal of the transistor is the gate, the signal input terminal is th...

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Abstract

The invention discloses a texture detection circuit, a charging circuit, a driving method, and a touch display panel, belonging to the field of display technology. The texture detection circuit includes: a first photosensitive element, a first switch subcircuit, and a switch subcircuit; the first stage of the first photosensitive element is connected to the signal readout line through the first switch subcircuit, and the first photosensitive element The second stage of the element is connected to the switching sub-circuit; the switching sub-circuit is also connected to the reverse power supply terminal and the charging sub-circuit respectively, and the switching sub-circuit is configured to: connect the second of the first photosensitive element to The connection state of the stage is switched between a first connection state and a second connection state, the first connection state is that the second stage of the first photosensitive element is connected to the reverse power supply terminal, and the second connection state is The second stage of the first photosensitive element is connected to the charging sub-circuit. The invention effectively improves the utilization rate of the first photosensitive element.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a texture detection circuit, a charging circuit, a driving method, and a touch display panel. Background technique [0002] The touch display panel includes a plurality of pixel units arranged in an array, and a pixel detection sub-circuit is arranged in a specific pixel unit, and the pixel detection sub-circuit is used to convert the detected optical signal into an electrical signal, and pass the electrical signal through the readout The line is taken and output to the processing module, so that the processing module judges whether there is a touch operation on the corresponding pixel area according to the output electrical signal. [0003] Wherein, the pixel unit is provided with a light source for fingerprint detection, and the pixel detection sub-circuit in each pixel unit includes: a photosensitive diode. When a finger is pressed on the surface of the display panel corresp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06F3/041G09G3/20
CPCG06F3/0412G09G3/20G06V40/1318H02J50/001H02J50/30H02J7/35H02J7/345H02J2310/22G06F3/0421G06F3/04166H02J7/007188G06F3/042
Inventor 丁小梁王海生王雷秦云科刘英明
Owner BOE TECH GRP CO LTD