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

A technology of pixel circuit and driving module, which is applied in the field of manufacturing of display devices, display panels and display devices, pixel circuits and their driving methods, and can solve the problem of single-direction drift of threshold voltage, shortening the service life of display panels, and affecting the display uniformity of display panels And other issues
CN112927652AInactive Publication Date: 2021-06-08SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
Publication Date
2021-06-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a pixel circuit and a driving method thereof, a display panel and a display device. The pixel circuit comprises a light-emitting module and a driving module, wherein the first end of the driving module is electrically connected with the light-emitting module, and is used for loading a first signal in a first time period, and loading a second signal in a second time period, the polarities of the first signal and the second signal are opposite, and the first time period and the second time period are not intersected. According to the scheme, drifting of the threshold voltage of the driving module can be slowed down, so that the service life of the display panel is prolonged.
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Description

technical field

[0001] The present application relates to the field of display technology, in particular to the manufacture of display devices, in particular to pixel circuits and their driving methods, display panels and display devices. Background technique

[0002] The OLED (Organic Light Emitting Diode, Organic Light Emitting Diode) display device has the advantages of light weight, thin thickness, bendability, and wide viewing angle range.

[0003] At present, a thin film transistor is used in the pixel circuit of an OLED display to control the current passing through the OLED to control the light emission of the OLED. However, the gate of the thin film transistor is loaded with a positive signal by a unique and fixed signal source during operation, resulting in the The difference between the gate signal and the source signal remains a positive signal for a long time, so that the threshold voltage drift of the thin film transistor shows a single change, which further ac...

Claims

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