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Pixel circuit, driving method thereof and active matrix OLED (organic lighting emitting diode)

A technology of pixel circuit and driving method, which is applied in the field of flat panel display, can solve problems such as slow pixel response speed, and achieve the effects of improving characteristic curves, avoiding uneven brightness, and avoiding influence

Active Publication Date: 2015-04-01
CHENGDU VISTAR OPTEOLECTRONICS CO LTD
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Problems solved by technology

[0012] 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 of slow response speed of the pixel due to the hysteresis of the driving transistor in the existing active matrix organic light emitting display

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  • Pixel circuit, driving method thereof and active matrix OLED (organic lighting emitting diode)
  • Pixel circuit, driving method thereof and active matrix OLED (organic lighting emitting diode)
  • Pixel circuit, driving method thereof and active matrix OLED (organic lighting emitting diode)

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Embodiment Construction

[0039]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.

[0040] Please refer to figure 2 , which is a schematic structural diagram of a pixel circuit according to an embodiment of the present invention. The pixel circuit 20 includes: a first thin film transistor T1 connected between the second node N2 and the third node N3, the gate of which is connected to the first node N1; a second thin film transistor T2 connected between the data line Dm and the third node N3. Between the...

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Abstract

The invention provides a pixel circuit, a driving method thereof and an active matrix OLED (organic lighting emitting diode). Through initialization of a first node connected with a gate electrode of a first thin film transistor, a current path from a second thin film transistor, a first thin film transistor and a fifth thin film transistor to a third power supply along a data line is formed, so that fixed current flows through the first thin film transistor, the characteristic curve of the driving transistor is improved, influence on the response speed due to characteristic curve lag is avoided, meanwhile, current output by the first thin film transistor is determined by data voltage provided by the data line and first power voltage provided by a first power supply and is not relevant to threshold voltage of the first thin film transistor, accordingly, uneven brightness caused by threshold voltage deviation can be avoided, and the active matrix OLED adopting the pixel circuit and the driving method of the pixel circuit can solve the display problem caused by both threshold voltage deviation and characteristic curve lag.

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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IPC IPC(8): G09G3/32H01L27/32G09G3/3233
Inventor 张九占
Owner CHENGDU VISTAR OPTEOLECTRONICS CO LTD
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