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

A technology of pixel circuit and driving signal, applied in the field of organic light-emitting display, can solve the problem of uneven light emission of display

Active Publication Date: 2016-09-07
WUHAN TIANMA MICRO ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In actual use, it is found that the organic light-emitting diode display has uneven luminescence

Method used

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

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Embodiment Construction

[0048]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0049] As mentioned in the background art, in actual use, it is found that organic light-emitting diode displays have non-uniform light emission. Specifically, refer to figure 1 Shown is a circuit diagram of an existing pixel circuit in an organic light emitting diode display. Most of the existing pixel circuits adopt a 2T1C structure, that is, include two transistors and a capacitor. Wherein, the transistor M20 is used as a current driving transistor to provi...

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Abstract

The invention discloses a pixel circuit, a driving method, a display panel, and a display device, wherein the pixel circuit includes: a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a driving transistor, and a first capacitor and the second capacitor, through the cooperation between each transistor and the capacitor, the present invention at least achieves one of the following beneficial effects: the drive current is equal to the threshold voltage of the drive transistor itself, the voltage drop of the power supply signal, and the voltage across the two ends of the light-emitting element. Regardless, the influence of the above factors is eliminated, thereby effectively improving the problem of uneven light emission of the display device, and improving the uniformity of light emission and the display effect of the display device.

Description

technical field [0001] The present invention relates to the technical field of organic light-emitting display, and more specifically, to a pixel circuit and its driving method, a display panel, and a display device. Background technique [0002] With the continuous development of multimedia, organic light emitting diode (Organic Light Emitting Diode, OLED) display has attracted attention in the display market due to its simple structure, excellent operating temperature, contrast ratio, viewing angle and other advantages. Organic light emitting diode displays include passive matrix OLED displays and active matrix OLED displays, and active matrix OLED displays are widely used due to low power consumption. In actual use, it is found that organic light-emitting diode displays have non-uniform light emission. Among them, the closest prior art of the present invention is Chinese patent document CN102930821. Contents of the invention [0003] In view of this, the present invent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3233
Inventor 马志丽钱栋
Owner WUHAN TIANMA MICRO ELECTRONICS CO LTD
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