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

A pixel driving circuit and pixel unit technology, applied in the field of pixel driving circuit and driving method thereof, array substrate, and display device, can solve the problems of insufficient pixel charging, inability to completely eliminate the influence of threshold voltage Vth luminous brightness, and short scanning time.

Active Publication Date: 2020-04-24
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the resolution and refresh rate of display devices increase, the scanning time of each row is very short, which will lead to insufficient charging of the pixels, thereby affecting the compensation effect, and cannot completely eliminate the influence of the threshold voltage Vth on the luminous brightness

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

[0042] In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0043] An embodiment of the present application provides a pixel driving circuit, which is applied to a display panel. The display panel includes a plurality of pixel units, and each pixel unit includes a pixel driving circuit and an OLED device. The pixel driving circuit is used to drive the OLED device to emit light. The pixel driving circuit It includes a reset module 11 , a driving transistor MT, a compensation module 12 , a data writing module 13 and a storage module 14 .

[0044] The reset module 11 is respectively connected to the first voltage input terminal S1, the second voltage input terminal S2, the third voltage input terminal Initial, the first node N1, the second node N2 and the third node N3, and is used for input...

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Abstract

The invention provides a pixel driving circuit and a driving method thereof, an array substrate and a display device. The pixel driving circuit comprises a reset module, a driving transistor, a compensation module, a data writing module and a storage module, the first voltage input by the first voltage input end connected with each pixel driving circuit is the same; the second voltage input by thesecond voltage input end connected with each pixel driving circuit is the same; the fourth voltage input by the fourth voltage input end connected with each pixel driving circuit is the same; therefore, the pixel driving circuit of each pixel unit can be reset and compensated at the same time through the reset module and the compensation module; for example, all pixel units can be controlled to be reset and compensated uniformly at the initial stage of each frame; and then data writing and light emitting are carried out through line-by-line scanning, so that sufficient charging time can be ensured, insufficient charging caused by refresh rate and resolution improvement is eliminated, and the problem of non-uniform pictures caused by drifting of threshold voltage Vth of a driving transistor is thoroughly eliminated.

Description

technical field [0001] The present invention relates to the field of display technology, and in particular, to a pixel driving circuit and a driving method thereof, an array substrate and a display device. Background technique [0002] Active Matrix Organic Light Emitting Diode (hereinafter referred to as AMOLED) display panel uses OLED to emit light of different brightness, so that the pixel display corresponding to OLED has corresponding brightness; compared with 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 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, the threshold voltage Vth of the driving transistor will drift, thereby affecting the light-emitting brightness of the...

Claims

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Application Information

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IPC IPC(8): G09G3/3225
CPCG09G3/3225
Inventor 王铁石刘伟星韩东旭
Owner BOE TECH GRP CO LTD
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