Organic light emitting display and degradation compensation method thereof

Patent metadata

Field	Value
Publication number	US-9230472-B2
Application number	US-201213679595-A
Country	US
Kind code	B2
Filing date	Nov 16, 2012
Priority date	Dec 8, 2011
Publication date	Jan 5, 2016
Grant date	Jan 5, 2016

Abstract

An organic light emitting display includes a display panel including pixels, a degradation sensing circuit which senses a threshold voltage of organic light emitting diodes included in the pixels and calculates an average degradation value defined by an average luminance value due to the degradation based on the sensed threshold voltage, a compensation target adjustor which adjusts a compensation target based on the average degradation value, each time the average degradation value is reduced by a previously determined reference value, and a data modulator which adds and subtracts a luminance compensation value determined depending on the adjusted compensation target to and from digital video data and modulates the digital video data.

First claim

What is claimed is:

1. An organic light emitting display comprising:
a display panel configured to display an image, the display panel including a plurality of pixels;
a degradation sensing circuit configured to sense a threshold voltage of organic light emitting diodes included in the pixels and calculate an average degradation value defined by an average luminance value due to the degradation based on the sensed threshold voltage of the organic light emitting diodes;
a compe…

Assignees

• Lg Display Co Ltd

Inventors

• Bae Hanjin

Classifications

• G09G3/3225 Primary

  Physics · mapped topic

• G09G2320/0223

  Physics · mapped topic

• G09G3/3208 Primary

  Physics · mapped topic

• G09G2320/0233

  Physics · mapped topic

• G09G2320/043

  Physics · mapped topic