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

A technology of a pixel circuit and a driving method, applied in the display field, can solve the problems of abnormal display, influence of display stability, drift of driving transistor characteristics, etc.

Active Publication Date: 2017-09-08
WUHAN TIANMA MICRO ELECTRONICS CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0004] Embodiments of the present invention provide a pixel circuit, a driving method thereof, a display panel, and a display device, which are used to solve the problem that in the prior art, the driving transistor is under the same bias voltage for a long time, causing the characteristic drift of the driving transistor, resulting in abnormal display and affecting the display. problem of stability

Method used

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

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Embodiment Construction

[0053] In order to make the purpose, technical solution and advantages of the present invention more clear, the specific implementations of the pixel circuit, its driving method, display panel and display device provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present invention, not to limit the present invention. And in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0054] An embodiment of the present invention provides a pixel circuit, such as figure 1 As shown, it includes: a coupling control module 10, a driving module 20, a compensation module 30 and a light emitting device L; the driving module 20 is used to drive the light emitting device L to emit light; the driving module 20 may spec...

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Abstract

The invention discloses a pixel circuit and a driving method thereof, a display panel, and a display device. The pixel circuit comprises a coupling control module, a driving module, a compensation module and a light-emitting device. Through mutual cooperation of the modules, the light-emitting device can be driven to emit light, the coupling control module couples signals of a light-emitting control signal terminal to a first electrode of a driving transistor at a coupling stage, the voltage of the first electrode of the driving transistor is increased, the driving transistor is prevented from being in a forward bias voltage in a long time, the time for characteristic recovery is provided for the driving transistor, the drift of a threshold voltage and the mobility change of the driving transistor can be rapidly recovered, display anomaly is avoided, and the display stability is improved.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a pixel circuit, a driving method thereof, a display panel and a display device. Background technique [0002] Organic Light Emitting Diode (OLED) is one of the hot spots in the field of flat panel display research today. Compared with Liquid Crystal Display (LCD), OLED display has low energy consumption, self-illumination, wide viewing angle and fast response speed. Etc. At present, OLED displays have begun to replace traditional LCD displays in display fields such as mobile phones, tablet computers, and digital cameras. Unlike LCDs that use a stable voltage to control brightness, OLEDs are driven by current and require a stable current to control their light emission. Generally, the OLED is driven to emit light through the driving transistor of the pixel driving circuit in the OLED display. [0003] However, when the OLED display switches to a 128-gray-scale image a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3233G09G3/3266
CPCG09G3/3233G09G3/3266
Inventor 周星耀李元冷传利翟应腾
Owner WUHAN TIANMA MICRO ELECTRONICS CO LTD
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