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Organic LED displaying device with ageing compensation

A display and light-emitting element technology, applied to static indicators, electroluminescent light sources, instruments, etc., can solve problems such as complex integration, reduced output, and occupying display space

Active Publication Date: 2004-08-11
GLOBAL OLED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This integration is complex, reduces yield and takes up real estate within the display

Method used

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  • Organic LED displaying device with ageing compensation
  • Organic LED displaying device with ageing compensation
  • Organic LED displaying device with ageing compensation

Examples

Experimental program
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Embodiment Construction

[0017] refer to figure 1 , an embodiment of the invention includes an OLED display 10 having a plurality of light emitting elements 12 arranged in groups 13; a current measuring device 14 for detecting the total current used by the display to generate a current signal on a line 15; and a device for driving Display controller 16. According to the invention, the controller 16 includes means for simultaneously energizing all of the light elements in the group, and the controller 16 is responsive to the current signal in order to calculate a correction signal for the light elements in the group. The controller 16 applies the correction signal to the input image signal 18, producing a corrected image signal 20 that compensates for output variations of the light emitting elements in the group. The current measuring device may comprise, as is known in the art, a resistor connected across the terminals of the operational amplifier.

[0018] In one embodiment, display 10 is a color g...

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Abstract

An OLED display includes a plurality of light emitting elements divided into two or more groups, the light emitting elements having an output that changes with time or use; a current measuring device for sensing the total current used by the display to produce a current signal; and a controller for simultaneously activating all of the light emitting elements in a group and responsive to the current signal for calculating a correction signal for the light emitting elements in the group and applying the correction signal to input image signals to produce corrected input image signals that compensate for the changes in the output of the light emitting elements of the group.

Description

technical field [0001] The present invention relates to solid-state OLED flat panel displays, and more particularly to aging-compensated displays of this type having means capable of compensating for the aging of organic light-emitting displays. Background technique [0002] Solid-state organic light-emitting diode (OLED) image displays are of great interest as an advanced flat-panel display technology. The display uses an electric current to flow through a thin film of organic material to emit light. The color of the emitted light and the efficiency of energy conversion from electric current to light are determined by the composition of the organic thin film material. Different organic materials emit light of different colors. However, as the display is used, the organic materials in the device age and the efficiency of emitting light decreases. This shortens the life of the display. As the display is used, different organic materials age at different rates, resulting i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B44/00G09G3/20G09G3/30G09G3/32H01L51/50
CPCG09G2320/0295G09G3/3208G09G2320/041G09G2320/0693G09G2320/048G09G3/30
Inventor R·S·科克A·D·阿诺
Owner GLOBAL OLED TECH