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Pixel drive circuit and method, pixel array substrate and display panel

A technology of a pixel driving circuit and a driving tube, which is applied in the field of a pixel driving circuit and its driving method, a pixel array substrate, and a display panel, and can solve problems such as poor brightness uniformity of the display panel, so as to avoid different driving currents, improve uniformity, and ensure The effect of uniformity

Active Publication Date: 2014-07-30
WUHAN TIANMA MICRO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of this, an embodiment of the present invention provides a pixel driving circuit and its driving method, a pixel array substrate, and a display panel to solve the problem that the driving current of the driving transistor in the pixel driving circuit in the prior art is related to its threshold voltage, which causes the display panel to The technical problem of poor brightness uniformity

Method used

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  • Pixel drive circuit and method, pixel array substrate and display panel
  • Pixel drive circuit and method, pixel array substrate and display panel
  • Pixel drive circuit and method, pixel array substrate and display panel

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Embodiment Construction

[0046] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only parts related to the present invention are shown in the drawings but not all content.

[0047] Embodiment 1 of the present invention provides a pixel driving circuit. figure 2 It is a schematic structural diagram of a pixel driving circuit provided in Embodiment 1 of the present invention. Such as figure 2 As shown, the pixel driving circuit includes: scan line SCAN1, data line DATA1, power line VS1, ground electrode GND, first signal line S1, second signal line S2, first transistor Q1, second transistor Q2, third transistor Q3 , a fourth transistor Q4, a driving transistor QD1, a storage capacitor C1, and an...

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Abstract

The invention discloses a pixel drive circuit and method, a pixel array substrate and a display panel. The pixel drive circuit is composed of a first transistor, a second transistor, a third transistor, a fourth transistor, a drive pipe, a storage capacitor and an organic LED. When the pixel drive circuit works at the light-emitting state of the organic LED, drive currents, used for driving the organic LED, generated by the drive pipe in a saturated condition are unrelated with the threshold voltages of the drive pipe, so that the drive currents can not be different due to different threshold voltages of the drive pipe, homogeneity of the drive currents of the organic LED can be improved, homogeneity of the brightness of the pixel array substrate comprising the pixel drive circuit is guaranteed, and furthermore the corresponding display panel has a better display effect.

Description

technical field [0001] The present invention relates to the technical field of organic light-emitting display, in particular to a pixel driving circuit and a driving method thereof, a pixel array substrate and a display panel. Background technique [0002] The active matrix organic light emitting diode (Active Matrix Organic Light Emitting Diode, referred to as AMOLED) in the pixel driving circuit of the display panel can emit light when the thin film transistor (Thin Film Transistor, referred to as TFT) as a driving tube is generated in a saturated state. Driven by the driving current, therefore, different driving currents generated by the driving tube will affect the display effect of the organic light emitting diode. [0003] figure 1 It is a structural schematic diagram of a pixel driving circuit in the prior art. see figure 1 , the pixel drive circuit in the prior art includes two N-type thin film transistors (M1 and M2, wherein M2 is a drive tube), a capacitor (C0) ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32G09G3/3233
Inventor 靳增建戴超张爽钟本顺林丹贾龙
Owner WUHAN TIANMA MICRO ELECTRONICS CO LTD
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