Pixel driving circuit and driving method thereof, array substrate and display device

A technology of a pixel driving circuit and a driving method, which is applied in the fields of array substrates, display devices, pixel driving circuits and driving methods thereof, and can solve problems affecting display effects, uneven screen brightness, and uneven driving current, etc.

Active Publication Date: 2020-04-10
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] According to the above formula, the driving current for driving the light-emitting device OLED to emit light is related to the threshold voltage Vth of the driving transistor. In practical applications, problems such as TFT characteristic drift will lead to uneven driving current of each pixel, which in turn leads to uneven brightness of the screen, affecting display effect

Method used

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

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Embodiment Construction

[0045]In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0046] An embodiment of the present application provides a pixel driving circuit, referring to figure 1 , the pixel driving circuit includes a reset module 11, a data writing module 12, a storage module 13, a driving transistor M4 and an OLED device.

[0047] The reset module 11 is respectively connected to the first voltage input terminal Gate (n-1), the second voltage input terminal GND, the first node A and the second node C, and is used to The input of the first voltage writes the second voltage input from the second voltage input terminal GND into the first node A and the second node C respectively.

[0048] The data writing module 12 is respectively connected to the third voltage input terminal Gate(n), the fourth voltage in...

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Abstract

The invention provides a pixel driving circuit and a driving method thereof, an array substrate and a display device, and the pixel driving circuit comprises a reset module, a data writing module, a storage module, a driving transistor and an OLED device. Through the reset module and the storage module, the driving transistor with the double-gate structure generates driving current irrelevant to the threshold voltage of the driving transistor in the charging and light-emitting stage, and therefore the phenomenon of uneven pictures caused by threshold voltage drifting is compensated for. And the driving current is irrelevant to the power supply voltage, so that the influence of IR drop can be eliminated.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a pixel driving circuit and a driving method thereof, an array substrate, and a display device. Background technique [0002] The active matrix organic light emitting diode (Active Matrix Organic Light Emitting Diode, hereinafter referred to as AMOLED) display panel uses OLED to emit light of different brightness, so that the pixels corresponding to OLED display have corresponding brightness; compared with the traditional thin film transistor liquid crystal display panel AMOLED display panel has faster response speed, higher contrast ratio and wider viewing angle, which is an important development direction of display panel. [0003] The current that drives OLED to emit light can be expressed by the following formula: [0004] [0005] Wherein, Vgs is the voltage difference between the gate and the source of the driving transistor, β is a parameter related to the pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3208G09G3/3233
CPCG09G3/3208G09G3/3233
Inventor 王铁石刘伟星徐智强韩东旭
Owner BOE TECH GRP CO LTD
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