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AMOLED (active matrix/organic light emitting diode) drive compensation circuit and method and display device thereof

A driving circuit and compensation circuit technology, applied in the field of AMOLED, can solve problems such as reducing the aperture ratio, and achieve the effect of increasing the aperture ratio

Active Publication Date: 2012-09-05
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing AMOLED drive compensation circuits often require 5 to 6 thin film transistors to be set in the same pixel area, so the aperture ratio will be reduced

Method used

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  • AMOLED (active matrix/organic light emitting diode) drive compensation circuit and method and display device thereof
  • AMOLED (active matrix/organic light emitting diode) drive compensation circuit and method and display device thereof

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Embodiment Construction

[0051] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0052] An embodiment of the present invention provides an AMOLED drive compensation circuit, including:

[0053] Several driving circuits arranged in the pixel area for driving several AMOLEDs;

[0054] Each driving circuit, such as a traditional 2T1C (two thin film transistors and one capacitor) circuit, includes a driving thin film transistor, and drives the AMOLED to emit light through the driving current of the driving thin film transistor.

[0055] The extern...

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Abstract

The invention discloses an AMOLED (active matrix / organic light emitting diode) drive compensation circuit and method and a display device thereof, relating to the field of an AMOLED. Through the invention, the aperture ratio can be increased. The drive compensation circuit comprises multiple drive circuits and an external compensation circuit, wherein the drive circuits are arranged in a pixel area and used for driving multiple AMOLEDs; and the external compensation circuit is arranged outside the pixel area and used for eliminating the influence of the threshold voltage of the drive TFTs (thin film transistors) of the drive circuits in the pixel area on the drive current flowing through the drive TFTs. The drive compensation method comprises the following steps of: I, storing the threshold voltage of the drive TFTs of the multiple drive circuits in the pixel area; II, storing the gray-scale voltage of the multiple drive circuits in the pixel area; and III, setting the grid voltage jump of the drive TFTs of the multiple drive circuits in the pixel area as the sum of the threshold voltage and gray-scale voltage. The display device comprises the AMOLED drive compensation circuit.

Description

technical field [0001] The invention relates to the field of AMOLED, in particular to an AMOLED drive compensation circuit, method and display device thereof. Background technique [0002] The active matrix organic light emitting diode panel (Active Matrix Organic Light Emitting Diode, AMOLED) can emit light is driven by the driving current generated by the driving thin film transistor in the driving circuit, but, as time changes, the driving thin film transistor The threshold voltage of the AMOLED may change, which will cause inconsistent driving current when the same gray scale voltage is input, so that the brightness of the driven AMOLED is different. At present, the main method to solve this problem is to add a drive compensation circuit to eliminate the influence of the threshold voltage, so as to achieve a consistent drive current and improve the brightness uniformity of the panel. [0003] In the process of realizing the present invention, the inventor finds that the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
CPCG09G3/3233G09G2300/0465G09G2300/0819G09G2300/0861G09G2300/0876G09G3/3258
Inventor 祁小敬李天马
Owner BOE TECH GRP CO LTD
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