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Pixel circuit and organic electroluminescence display panel

A technology of pixel circuits and light-emitting devices, applied in static indicators, instruments, etc., can solve problems such as affecting the brightness of light-emitting devices

Active Publication Date: 2015-01-07
HEFEI XINSHENG OPTOELECTRONICS TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] An embodiment of the present invention provides a pixel circuit and an organic electroluminescent display panel, which are used to solve the problem in the prior art that the variation of the threshold voltage of the drive transistor in the pixel circuit affects the luminance of the light-emitting device

Method used

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  • Pixel circuit and organic electroluminescence display panel
  • Pixel circuit and organic electroluminescence display panel
  • Pixel circuit and organic electroluminescence display panel

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Embodiment Construction

[0037] The specific implementation manners of the pixel circuit and the organic electroluminescent display panel provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0038] An embodiment of the present invention provides a pixel circuit, such as image 3 As shown, it includes: a charging module 01, a driving module 02, an initialization module 03, and a light emitting device 04; wherein,

[0039]The input terminal of the charging module 01 is connected to the data signal terminal Data, the control terminal is connected to the scanning signal terminal Scan, and the output terminal is connected to the control terminal of the driving module 02 and the first output terminal of the initialization module 03 respectively;

[0040] The input terminal of the driving module 02 is connected to the first reference signal terminal Ref1, and the output terminal is connected to the first input terminal of the in...

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Abstract

The invention discloses a pixel circuit and an organic electroluminescence display panel. An initialization module is additionally arranged in the pixel circuit. During the initialization stage, the initialization module initializes a drive module and a light-emitting device, and during the writing-in stage, a charging module writes data signals of the data signal end into the control end of the drive module; during the light-emitting stage, the charging module uploads a first reference signal input by the data signal end to the control end of the drive module, and the initialization module connects the output end of the drive module and the input end of the light-emitting device to make the drive module drive the light-emitting device to emit light. Compared with a pixel circuit in the prior art, the pixel circuit initializes the drive module and the light-emitting device during the initialization stage, the influence on the follow-up stage from previous-stage differential pressure is eliminated, compensation voltage and drive voltage are provided for the drive module during the writing-in stage, the influence on the luminance of the light-emitting device from the change of threshold voltage can be avoided, and therefore the quality of a display frame can be ensured.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a pixel circuit and an organic electroluminescent display panel. Background technique [0002] With the progress of display technology, organic light emitting display (Organic Light Emitting Diode, OLED) is one of the hotspots in the field of flat panel display research today, more and more active matrix organic light emitting diode (Active Matrix Organic Light Emitting Diode, AMOLED) Display panels have entered the market. Compared with traditional thin film transistor liquid crystal display panels (Thin Film Transistor Liquid Crystal Display, TFT LCD), AMOLED has faster response speed, higher contrast ratio and wider viewing angle. [0003] The circuit structure of a general AMOLED pixel circuit, such as figure 1 As shown, it includes: a driving transistor M1, a switching transistor M2, a storage capacitor C, and a light-emitting device OLED; wherein, the gate of the driving ...

Claims

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Application Information

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IPC IPC(8): G09G3/32G09G3/3225
CPCG09G3/3233G09G3/3291G09G2300/0819G09G2300/0842G09G2300/0861G09G2310/0251G09G2310/061G09G2310/08G09G2320/0233G09G2320/045
Inventor 胡祖权
Owner HEFEI XINSHENG OPTOELECTRONICS TECH CO LTD