A driving method of a pixel circuit, a display panel and a display device

A pixel circuit and driving method technology, which is applied in the display field, can solve problems affecting image display effects, uneven brightness, and distortion of characteristic curves, and achieve the effects of reducing characteristic drift, display mura, and distortion

Active Publication Date: 2020-09-08
WUHAN TIANMA MICRO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the process and device aging, the characteristics of the driving transistor in the pixel circuit corresponding to each pixel drift, such as the threshold voltage drift, and the driving transistor generally works in the sub-threshold region for a long time, which is also easy to cause the characteristics of the driving transistor to drift. After the characteristics of the driving transistor drift, the characteristic curve will be distorted, and it may not be completely coincident after compensation, so the characteristics of different driving transistors have different degrees of deviation, and there will be problems such as uneven brightness (mura) and afterimages. Affects the display of the entire image

Method used

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  • A driving method of a pixel circuit, a display panel and a display device
  • A driving method of a pixel circuit, a display panel and a display device
  • A driving method of a pixel circuit, a display panel and a display device

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0029] figure 1 It is a schematic flowchart of a method for driving a pixel circuit provided by an embodiment of the present invention, wherein the pixel circuit includes a data writing module, a driving transistor, a holding module and a light emitting element;

[0030] see figure 1 , in a frame display period, the driving method includes:

[0031] S110, the data writing stage, the data writing module writes the data signal into the gate of the driving transistor.

[0032] S120 , in the light-emitting stage, t...

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Abstract

The embodiment of the invention discloses a driving method of a pixel circuit, a display panel and a display device. The pixel circuit includes a data writing module, a driving transistor, a holding module and a light-emitting element; during a display period of one frame, the driving method includes: a data writing stage, and the data writing module writes a data signal into the The gate of the drive transistor; in the light-emitting stage, the holding module maintains the gate voltage of the drive transistor, the drive transistor provides a drive current to the light-emitting element, and the light-emitting element emits light in response to the drive current; the cut-off stage , the driving transistor works in a completely cut-off region. The technical solution provided by the embodiments of the present invention reduces the degree of characteristic drift of the driving transistor and can improve the display effect of the display screen.

Description

technical field [0001] Embodiments of the present invention relate to the field of display technology, and in particular, to a driving method for a pixel circuit, a display panel, and a display device. Background technique [0002] Compared with liquid crystal displays, organic light-emitting displays have the advantages of low energy consumption, low production cost, self-illumination, wide viewing angle, and fast response speed. Currently, they are widely used in display fields such as mobile phones, PDAs, and digital cameras. Each pixel of an organic light-emitting display includes an organic light-emitting diode and a pixel circuit that drives the organic light-emitting diode to emit light. [0003] A pixel circuit generally includes a driving transistor, several switching transistors and storage capacitors. Due to the process and device aging, the characteristics of the driving transistor in the pixel circuit corresponding to each pixel drift, such as threshold voltage...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3233G09G3/3275
CPCG09G3/3233G09G3/3275G09G2300/0819G09G2300/0842G09G2300/0861G09G2310/0251G09G2310/0262G09G2320/043G09G2310/0264G09G3/30
Inventor 席克瑞崔婷婷林柏全欧阳珺婷蔡中兰
Owner WUHAN TIANMA MICRO ELECTRONICS CO LTD
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