A pixel circuit, an organic electroluminescent display panel, and a display device

A technology of pixel circuits and light-emitting devices is applied in the fields of pixel circuits, organic electroluminescence display panels and display devices, and can solve the problems of poor current uniformity and uneven display brightness.

Active Publication Date: 2016-07-06
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a pixel circuit, an organic electroluminescence display panel, and a display device, which are used to solve the problems of poor uniformity of current for driving a light-emitting device OLED and uneven display brightness existing in a display device in the prior art

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  • A pixel circuit, an organic electroluminescent display panel, and a display device
  • A pixel circuit, an organic electroluminescent display panel, and a display device
  • A pixel circuit, an organic electroluminescent display panel, and a display device

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Embodiment Construction

[0042] The specific implementation manners of the pixel circuit, the organic electroluminescent display panel and the display device provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0043] An embodiment of the present invention provides a pixel circuit, such as figure 2 As shown, it includes: a light emitting device 01, a charging module 02, a driving module 03, and a testing module 04; wherein,

[0044] The input terminal of the charging module 02 is connected to the data signal terminal Data, the control terminal is connected to the scanning signal terminal Gate, and the output terminal is connected to the first input terminal a1 and the first output terminal b1 of the test module 04 respectively;

[0045]The control terminal of the driving module 03 is connected to the second output terminal b2 of the test module 04, the input terminal is connected to the first reference signal terminal Re...

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Abstract

The invention discloses a pixel circuit, an organic electroluminescence display panel and a display device. A test module is added to the pixel circuit. During the display period, the charging module provides a driving voltage signal to the driving module through the testing module, and the driving module is driving Under the control of the voltage signal, the light-emitting device is driven to emit light; during the test period, the current signal of the light-emitting device reaches the output terminal of the charging module through the test module, and the charging module outputs the current signal to the data signal terminal, and the external compensation processing unit receives it according to the data signal terminal. The received current signal determines the compensation voltage signal for each pixel circuit, the driving unit superimposes the compensation voltage signal and the data signal received from the signal source and sends it to the data signal terminal, and provides the driving module with a compensated driving voltage signal through the charging module, Finally, the current signal driving the light-emitting device to emit light reaches the uniformity standard, so that the brightness of the pixel is displayed uniformly, and the quality of the display picture is guaranteed.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescence, in particular to a pixel circuit, an organic electroluminescence display panel and a display device. Background technique [0002] Organic Light Emitting Diode (OLED) is one of the hot spots in the field of flat panel display research today. Compared with liquid crystal displays, OLED has the advantages of low energy consumption, low production cost, self-illumination, wide viewing angle and fast response speed. , PDA, digital cameras and other display fields OLED has begun to gradually replace the traditional LCD display. Unlike LCD, which uses a stable voltage to control brightness, OLED is current-driven and requires a stable current to control light emission. [0003] Existing pixel circuits that drive OLED to emit light, 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; wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3208
CPCG09G3/006G09G3/3233G09G2310/0251G09G2320/0233G09G2320/0295G09G2330/12G09G3/3258G09G2320/0626
Inventor 吴昊
Owner BOE TECH GRP CO LTD
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