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A pixel circuit and an organic electroluminescence display panel

A technology for pixel circuits and light-emitting devices, which can be used in static indicators, instruments, etc., and can solve problems affecting the brightness of light-emitting devices

Active Publication Date: 2016-07-06
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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  • A pixel circuit and an organic electroluminescence display panel
  • A pixel circuit and an organic electroluminescence display panel
  • A pixel circuit and an 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

There are provided a pixel circuit, a method for driving the light emitting device (04) and an organic light emitting display panel. The initializing module (03) is added to the pixel circuit. In the initializing phase, the initializing module (03) initializes the driving module (02) and the light emitting device (04); in the writing phase, the charging module (01) writes the data signal inputted from the data signal terminal into the control terminal of the driving module (02); and in the light emitting phase, the charging module (01) loads the first reference signal inputted from the data signal terminal (Data) to the control terminal of the driving module (02), and the initializing module (03) connects the output terminal of the driving module (02) with the input terminal of the light emitting device (04) so that the driving module (02) drives the light emitting device (04) to emit light. The pixel circuit initializes the driving module (02) and the light emitting device (04) in the initialization phase, which eliminates the influence of the voltage difference in a previous phase on a subsequent phase, provides a compensating voltage and a driving voltage for the driving module (02) in the writing phase, which avoids the influence of change of the threshold voltage on the light emitting luminance of the light emitting device (04), so that the quality of the display picture is 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 advancement of display technology, organic light-emitting display (OrganicLightEmittingDiode, OLED) is one of the hotspots in the field of flat panel display research today, and more and more active matrix organic light-emitting diode (ActiveMatrixOrganicLightEmittingDiode, AMOLED) display panels have entered the market Advanced thin film transistor liquid crystal display panel (ThinFilmTransistorLiquidCrystalDisplay, TFTLCD), 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 transistor M1 is connected...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3258G09G3/3225
CPCG09G3/3233G09G3/3291G09G2300/0819G09G2300/0842G09G2300/0861G09G2310/0251G09G2310/061G09G2310/08G09G2320/0233G09G2320/045
Inventor 胡祖权
Owner HEFEI XINSHENG OPTOELECTRONICS TECH CO LTD