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Pixel circuit and driving method thereof as well as active matrix organic light emitting display

A technology of pixel circuit and driving method, applied in the field of flat panel display, can solve the problem of slow pixel response speed, and achieve the effect of preventing lag effect, fast response speed and improving response speed

Inactive Publication Date: 2015-04-29
KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD
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  • Abstract
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Problems solved by technology

[0013] The object of the present invention is to provide a pixel circuit and its driving method and an active matrix organic light emitting display, so as to solve the problem that the response speed of the pixel is slowed down due to the hysteresis of the driving transistor in the existing active matrix organic light emitting display

Method used

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  • Pixel circuit and driving method thereof as well as active matrix organic light emitting display
  • Pixel circuit and driving method thereof as well as active matrix organic light emitting display
  • Pixel circuit and driving method thereof as well as active matrix organic light emitting display

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Embodiment Construction

[0044] A pixel circuit, a driving method thereof and an active matrix organic light emitting display provided by the present invention will be further described in detail below in conjunction with the drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0045] Please refer to image 3 , which is a schematic structural diagram of a pixel circuit according to an embodiment of the present invention. Such as image 3 As shown, the pixel circuit 20 includes: an organic light emitting diode OLED connected between the first power supply and the second power supply; a first thin film transistor M1 connected between the first power supply and the second node N2, and its gate con...

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Abstract

The invention provides a pixel circuit and a driving method thereof as well as an active matrix organic light emitting display. By eliminating the current flowing through a third thin film transistor before threshold voltage compensation to prevent the lag effect of the third thin film transistor, and thus a response speed is increased; meanwhile, the current output by the third thin film transistor is determined by data voltage provided by a data wire and a first supply voltage provided by a first power supply, and is unrelated to the threshold voltage of the third thin film transistor, so that uneven brightness caused by threshold voltage deviation can be avoided. Accordingly, display problems caused by threshold voltage deviation and the lag effect of the driving transistor can be avoided by adopting the pixel circuit and the driving method thereof as well as the active matrix organic light emitting display and higher uniformity of luminance and the higher response speed are achieved.

Description

technical field [0001] The invention relates to the technical field of flat panel display, in particular to a pixel circuit, a driving method thereof, and an active matrix organic light emitting display. Background technique [0002] An organic light-emitting display uses an organic light-emitting diode (English full name Organic Lighting Emitting Diode, referred to as OLED) to display images. It is an active light-emitting display. TFT-LCD) has different display methods, no backlight is required, and it has many advantages such as high contrast, fast response, and thinness. Therefore, the organic light emitting display is hailed as a new generation of display that can replace the thin film transistor liquid crystal display. [0003] According to different driving methods, organic light-emitting displays are divided into passive matrix organic light-emitting displays (English full name Passive Matrix Organic Lighting Emitting Display, referred to as PMOLED) and active matri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32G09G3/3225
Inventor 张九占川岛进吾朱修剑
Owner KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD
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