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Pixel circuit, driving method thereof, and display device

A pixel circuit, high-level technology, used in static indicators, instruments, etc., can solve the problems of display screen distortion and uneven output current.

Active Publication Date: 2021-01-15
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above problems, the present invention provides a pixel circuit, a driving method thereof, and a display device, which at least partially solve the problem of distorted display images due to uneven output current at the end of the existing source-following thin film transistors.

Method used

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  • Pixel circuit, driving method thereof, and display device
  • Pixel circuit, driving method thereof, and display device
  • Pixel circuit, driving method thereof, and display device

Examples

Experimental program
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Effect test

Embodiment 1

[0054] figure 1 It is a schematic structural diagram of a pixel circuit provided by Embodiment 1 of the present invention. Such as figure 1 As shown, the pixel circuit includes a photosensitive device PD, a reset unit 101, a charging unit 102, a compensation unit 103, an output unit 104, and a light emitting device OLED. The first pole of the photosensitive device PD is grounded, and the photosensitive device PD The second pole is connected to the charging unit 102 , the first pole of the light emitting device OLED is connected to the output unit 104 , and the second pole of the light emitting device OLED is grounded. In this embodiment, the photosensitive device PD includes a photodiode, and the light emitting device OLED is an organic electroluminescent device. The technical solution provided by this embodiment integrates the compensation circuit and the pixel circuit, and realizes the functional integration of the two through the sharing of the driving signal and the scan...

Embodiment 2

[0063] This embodiment provides a display device, including the pixel circuit provided in Embodiment 1. For details, please refer to the description of Embodiment 1, which will not be repeated here.

[0064] In the display device provided in this embodiment, the pixel circuit includes a photosensitive device, a reset unit, a charging unit, a compensation unit, an output unit, and a light emitting device, and the reset unit is used for inputting the first signal terminal and the second signal terminal The signal controls the potential of the first node and the second node, the charging unit is used to control the potential of the second node according to the input signal of the third signal terminal, and the compensation unit is used to control the potential of the second node according to the input signal of the fourth signal terminal and the fifth signal terminal and the second node The potential of the first node and the third node are controlled by the potential of the outpu...

Embodiment 3

[0066] Figure 4 It is a flow chart of a driving method for a pixel circuit provided in Embodiment 3 of the present invention, Figure 5 A working timing diagram of a pixel circuit provided by Embodiment 3 of the present invention. Such as Figure 4 and Figure 5 As shown, the pixel circuit includes the pixel circuit provided in Embodiment 1, the first voltage terminal Vdd is at a high level, and the second voltage terminal Vdata is a data signal voltage.

[0067] The driving method of the pixel circuit includes:

[0068] Step 1001, the first stage, the input signal of the first signal terminal is low level, the input signal of the second signal terminal is low level, the input signal of the third signal terminal is low level, the fourth signal terminal The input signal of the signal terminal is high level, the input signal of the fifth signal terminal is high level, the input signal of the sixth signal terminal is high level, and the input signal of the seventh signal ter...

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Abstract

Embodiments of the present disclosure provide a pixel circuit, a driving method thereof and a display apparatus. The pixel sub-circuit comprises a resetting sub-circuit is configured to control potentials of a first node and a second node according to inputting signals of a first signal terminal and a second signal terminal; a charging sub-circuit is configured to control a potential of the second node according to an inputting signal of a third signal terminal; a compensating sub-circuit configured to control the potentials of the first node and a third node according to inputting signals of a fourth and a fifth signal terminals and a potential of the second node; an outputting sub-circuit configured to control outputting signals of the first terminal of the light emitting device and a reading terminal according to the inputting signal of a sixth and a seventh signal terminals and a potential of the third node.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a pixel circuit, a driving method thereof, and a display device. Background technique [0002] CMOS (Complementary Metal-Oxide Semiconductor, Complementary Metal-Oxide Semiconductor) image sensor can convert the function of pure logic operation into electrical energy after receiving external light and then transmit it. As the detection circuit of the most common CMOS image sensor, the active pixel sensor (Active Pixel Sensor, referred to as APS) circuit in the photoelectric conversion process of the photosensitive device, due to the difference in the process of the source follower thin film transistor (Thin Film Transistor, TFT) As a result, the terminal output current is not uniform, and the output current of the source follower TFT will be affected by its own threshold voltage, thereby distorting the display image. Contents of the invention [0003] In order to solv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/20
CPCG09G3/20G09G3/3233G09G2300/0819G09G2300/0852G09G2300/0861G09G2310/0251G09G2310/0262G09G2360/148G09G2320/02
Inventor 杨盛际董学吕敬陈小川刘冬妮王磊肖丽卢鹏程付杰岳晗
Owner BOE TECH GRP CO LTD