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Organic light emitting display

A light-emitting display, organic technology, used in static indicators, instruments, etc., can solve the problems of uneven brightness of the display screen, deterioration of transistor threshold voltage, and inability to output current.

Inactive Publication Date: 2015-08-26
INNOLUX CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of using an N-type driving thin film transistor is that after a period of operation, the threshold voltage of the transistor will start to deteriorate, that is, the same driving voltage cannot output the same current as the initial one, resulting in the brightness of the display screen. Non-uniform phenomenon (called MURA effect)

Method used

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Embodiment Construction

[0042] In order to make the above-mentioned and other purposes, features, and advantages of the present invention more clearly understood, the preferred embodiments are specifically listed below, together with the accompanying drawings, and are described in detail as follows:

[0043] figure 1 It is a schematic diagram showing a pixel 100 in an Active Matrix Organic Light Emitting Diode (AMPLED) display according to an embodiment of the present invention. The pixel 100 includes a data sampling unit 110 , a compensation unit 120 , a driving unit 130 and a light emitting unit 140 . The data sampling unit 110 includes a transistor T1 and a capacitor C1. The transistor T1 is controlled by the scan signal Sscan so as to sample the gray scale data Data and store it in the capacitor C1 to provide the driving signal VD. The driving unit 130 includes a transistor T3 and a driving transistor TD, wherein the transistor T3 coupled between the power terminal ELVDD and the driving transis...

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Abstract

The invention provides an organic light emitting display. A pixel array comprises a plurality of pixels, wherein each pixel of the plurality of pixels comprises a light emitting element and a driving transistor. A first grid of the driving transistor receives a driving signal, and a second grid of the driving transistor receives a compensation signal. A grid driving circuit supplies the compensation signal according to a total current value flowing through the light emitting elements of the plurality of pixels. When the total current value is between a first reference value and a second reference value, the grid driving circuit adjusts a voltage level of the compensation signal according to the total current value. The first reference value is 90% of an objective current value, and the second reference value is 50% of the objective current value.

Description

technical field [0001] The invention relates to an organic light-emitting diode (Organic Light-Emitting Diode, OLED) display, in particular to an organic light-emitting diode display capable of automatically compensating the critical voltage of a transistor. Background technique [0002] In general, an OLED is a self-luminous display element that emits light by electrically exciting a light-emitting organic compound. Recently, organic light emitting diodes have drawn attention and been applied to the fields of flat panel displays, television screens, computer monitors, and screens of portable electronic devices. When used in displays, OLEDs offer several advantages over flat-panel displays, such as their self-illuminating capabilities, wide viewing angles, and high brightness. [0003] Because thin film transistor-active organic light-emitting diode (Thin Film Transistor-Active Matrix Organic Light Emitting Diode, TFT-AMOLED) display has low manufacturing cost, high respons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32
Inventor 曾名骏周政旭陈俊佑郭拱辰
Owner INNOLUX CORP
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