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

A technology of a pixel circuit and a driving signal, applied in the field of a pixel circuit and a driving method thereof, a display device, and a display panel, can solve problems such as uneven light emission of a display

Active Publication Date: 2014-12-10
WUHAN TIANMA MICRO ELECTRONICS CO LTD +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

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

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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 provid...

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Abstract

The invention discloses a pixel circuit as well as a driving method, a display panel and a display device thereof. The pixel circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a driving transistor, a first capacitor and a second capacitor. Through the cooperation between all transistors and the capacitors, the pixel circuit as well as the driving method, the display panel and the display device thereof can achieve one of the following benefits at least: the driving current is enabled to be unrelated to the threshold voltage of the driving transistor, the pressure drop of a power supply signal, and the step voltage of the two ends of a light-emitting element; as the influence of the forenamed factors is eliminated, the problem that the conventional display device is uneven in light emission is further improved effectively, and the uniformity of luminance uniformity and the display effect of the display device are improved.

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. Contents of the invention [0003] In view of this, the present invention provides a pixel circuit and its driving method, a display panel, and a display device. By compe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32G09G3/3233
Inventor 马志丽钱栋
Owner WUHAN TIANMA MICRO ELECTRONICS CO LTD
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