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Method of healing of low-ohmic defects in a flat display

A flat-panel display and display technology, applied to static indicators, instruments, electric solid devices, etc., can solve the problem of the drop of the luminescent layer of the display

Inactive Publication Date: 2005-07-06
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the lifetime of the display may drop below what the emissive layer would have been

Method used

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  • Method of healing of low-ohmic defects in a flat display
  • Method of healing of low-ohmic defects in a flat display
  • Method of healing of low-ohmic defects in a flat display

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Embodiment Construction

[0034] The invention is illustrated with reference to organic or polymer light emitting diode displays.

[0035] figure 1 Represents the equivalent circuit of part of a matrix display with light-emitting diodes, including anode and cathode drivers. The anode driver is usually designed as a constant current source with a current-dependent output characteristic curve R a (I). R col is the internal resistance of this unit, connect this defect to the anode driver. The defect itself is characterized by a resistor R d . In this embodiment, cathode c1 is selected, and cathodes c2 and c3 are not selected. The corresponding cathode driver output characteristics are determined by the resistor R c，sel and R c，dc to make sure.

[0036]Assuming multiplexed driving in a common cathode manner, the following methods of providing the required repair energy with cathode drivers are possible:

[0037] 1. During the shortest clock cycle t min , forcing the anode potential to ground. T...

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PUM

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Abstract

A method of healing low-ohmic defects in a flat display is characterized by passing an extra current during a pre-determined time period through the affected subarea of the flat display, said current being selected to turn at least one defect or a specific surrounding of at least one defect into a high-ohmic state which has a resistance higher than the initial resistance of said at least one defect.

Description

technical field [0001] The present invention relates to methods of repairing low ohmic defects in flat panel displays. Background technique [0002] "Low ohmic defect" means that the leakage current caused by this defect affects the human visual performance of the display. [0003] A flat panel display is a stack of structural layers including at least one transparent electrode layer, one light-emitting or light-absorbing or polarizing layer, or any other kind of light-modulating layer and a counter electrode layer. One or all of the electrode layers and light modulating layers are formed to individually address sub-regions of the display, usually by switching the drive of the sub-regions. In a matrix display, this sub-area is a single pixel, while in a segmented display, each segment defines a sub-area. [0004] Self-emitting passive segmented or matrix displays based on light-emitting polymers have gradually entered the market a few years ago. Such displays make use of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/10G01R33/561G02F1/1343G02F1/135G09F9/00G09G3/20G09G3/3216G09G3/3225G09G3/3266G09G3/3275H01L51/50H05B33/14
CPCG09G3/20G09G3/3216G09G3/3225G09G3/3266G09G3/3275G09G2300/06G09G2300/08G09G2310/0256G09G2320/029G09G2320/043G09G2330/08G09G2330/12H10K71/861G01R33/561
Inventor G·格雷伊M·H·克赖恩P·范德维杰B·J·C·贾科布斯J·格特斯
Owner KONINKLIJKE PHILIPS ELECTRONICS NV