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Organic light emitting display and driving method thereof

A light-emitting display, organic technology, applied to static indicators, electroluminescent light sources, instruments, etc., can solve the problems of not being able to display images with uniform brightness, and the threshold voltage of the second transistor M2 is different

Active Publication Date: 2009-04-22
SAMSUNG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to processing errors in the manufacturing process, the threshold voltage of the second transistor M2 is different from
Therefore, the pixel part cannot display an image with uniform brightness

Method used

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  • Organic light emitting display and driving method thereof
  • Organic light emitting display and driving method thereof
  • Organic light emitting display and driving method thereof

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0040] figure 2 is a diagram of a first embodiment of an organic light emitting display 100 including pixels. refer to figure 2 , the organic light emitting display 100 includes a pixel portion 110 , a scan driver 120 , a data driver 130 , a first power source 150 and a second power source 170 .

[0041] The pixel part 110 includes a plurality of pixels 111 defined by a plurality of scan lines S1 to SN, a plurality of data lines D1 to DM, and a plurality of power supply lines V1 to VN. The power supply lines V1 to VN are arranged in parallel with the scan lines S1 to SN formed on the pixel portion 110 .

[0042] When scan signals are sent to the scan lines S1 to SN, individual pixels 111 are selected, and the selected pixels 111 emit light based on the current received from the power supply lines V1 to VN corresponding to the currents sent to the data lines Data signal from D1 to DM. More specifically, an organic light emitting diode (OLED) in each pixel 111 emits light ...

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PUM

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Abstract

An organic light emitting display and a driving method thereof are disclosed which minimize non-uniform brightness due to the different properties of transistors due to their manufacture. The organic light emitting display comprises a plurality of pixels defined by a plurality of scan lines for supplying a scan signal, a plurality of data lines for supplying a data signal, and a plurality of power source lines. Each pixel comprises a pixel circuit for outputting current from the power source line corresponding to the data signal, wherein power is supplied to the power source line corresponding to a sub-frame. Each pixel further comprises an organic light emitting diode configured to emit light depending on the current outputted from the pixel circuit. With this configuration, desired gradation is represented by supplying the first power, having different voltage levels according to the digital data signals of the respective sub-frames, to an anode electrode of the organic light emitting diode. Thus, non-uniformity of brightness due to property difference between transistors in the pixel circuits is minimized.

Description

technical field [0001] The present invention relates to an organic light emitting display and a driving method thereof, and more particularly, to an organic light emitting display and a driving method thereof which minimize non-uniform luminance due to characteristic differences among transistors. Background technique [0002] Since CRT displays are relatively heavy and bulky, various flat panel displays have been developed to replace cathode ray tube (CRT) displays. Types of flat panel displays include liquid crystal displays (LCDs), field emission displays (FEDs), plasma display panels (PDPs), and organic light emitting displays (LEDs). [0003] Organic light emitting displays independently emit light using the recombination energy of electrons and holes, and are classified into inorganic-organic light emitting displays including inorganic emission layers, and organic-organic light emitting displays including organic emission layers. The organic-organic light emitting dis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/32G09G3/30G09G3/20H05B33/08H05B33/14H05B44/00
CPCY02B20/36Y02B20/345G09G3/3233G09G2300/0842G09G2330/028G09G2320/0233
Inventor 金烘权
Owner SAMSUNG DISPLAY CO LTD