Method of driving organic light emitting display apparatus

Patent metadata

Field	Value
Publication number	US-2016005383-A1
Application number	US-201514792054-A
Country	US
Kind code	A1
Filing date	Jul 6, 2015
Priority date	Jul 7, 2014
Publication date	Jan 7, 2016
Grant date	—

Abstract

Disclosed is a method of driving an organic light emitting display apparatus which, when a defective pixel where at least one organic light emitting diode (OLED) is not normally driven occurs in a plurality of pixels each including two OLEDs, changes input image data corresponding to a data voltage to be supplied to the at least one OLED by using a compensation value.

First claim

What is claimed is:

1 . A method of driving an organic light emitting display apparatus, the method comprising:
determining whether input image data, corresponding to a defective pixel which includes two organic light emitting diodes (OLEDs) and has been repaired because at least one of the two OLEDs cannot normally emit light or a normal pixel which is adjacent to the defective pixel and includes two OLEDs normally emitting light, is received; when the received input image data is not the input image data corresponding to the defective pixel or the normal pixel, realigning the input image data to generate normal image data; when the received input image data is the input image data corresponding to the defective pixel or the normal pixel, changing a gray scale of the input image data by using a compensation value to generate compensation image data; and generating a normal data voltage corresponding to the normal image data or a compensation data voltage corresponding to the compensation image data to supply the normal data voltage or the compensation data voltage to a panel where the pixels are provided.

2 . The method of claim 1 , wherein the determining comprises, when the two OLEDs included in the defective pixel are repaired to be connected to a driver included in the normal pixel because a driver which is provided in the defective pixel to drive the two OLEDs is not normally driven, determining whether the input image data is input image data corresponding to the normal pixel.

3 . The method of claim 2 , wherein the generating of the compensation image data comprises increasing a gray scale of the input image data corresponding to the normal pixel by using the compensation value to generate the compensation image data.

4 . The method of claim 1 , wherein the determining comprises, when an OLED which is not normally driven among the two OLEDs included in the defective pixel is repaired to be isolated from a driver included in the defective pixel for driving the two OLEDs, determining whether the input image data is input image data corresponding to the defective pixel.

5 . The method of claim 4 , wherein the generating of the compensation image data comprises decreasing a gray scale of the input image data corresponding to the defective pixel by using the compensation value to generate the compensation image data.

6 . The method of claim 1 , wherein the determining comprises, when an OLED which is normally driven among the two OLEDs included in the defective pixel is repaired to be connected to a driver for driving the two OLEDs included in the normal pixel, determining whether the input image data is input image data corresponding to the defective pixel.

7 . The method of claim 6 , wherein the generating of the compensation image data comprises increasing a gray scale of the input image data corresponding to the normal pixel by using the compensation value to generate the compensation image data.

8 . The method of claim 1 , wherein the generating of the compensation image data comprises changing a gray scale of the input image data to generate the compensation image data, based on the compensation value which is set as a certain value for the defective pixel or the normal pixel.

9 . The method of claim 1 , wherein the generating of the compensation image data comprises:
calculating the compensation value, based on a gray scale of the input image data, a position of a horizontal line where the defective pixel occurs in the panel, or a color corresponding to the input image data; and changing the gray scale of the input image data to generate the compensation image data, based on the calculated compensation value.

10 . The method of claim 1 , wherein the generating of the compensation image data comprises:
calculating the compensation value, based on at least two of a gray scale of the input image data, a position of a horizontal line where the defective pixel occurs in the panel, and a color corresponding to the input image data; and changing the gray scale of the input image data to generate the compensation image data, based on the calculated compensation value.

11 . A method of driving an organic light emitting display apparatus, the method comprising:
determining whether input image data, corresponding to a defective pixel which has been repaired because an organic light emitting diode (OLED) cannot normally emit light or a normal pixel which is adjacent to the defective pixel and includes an OLED normally emitting light, is received; when the received input image data is not the input image data corresponding to the defective pixel or the normal pixel, realigning the input image data to generate normal image data; when the received input image data is the input image data corresponding to the defective pixel or the normal pixel, changing a gray scale of the input image data by using a compensation value to generate compensation image data; and generating a normal data voltage corresponding to the normal image data or a compensation data voltage corresponding to the compensation image data to supply the normal data voltage or the compensation data voltage to a panel where the pixels are provided.

Assignees

• Lg Display Co Ltd

Inventors

• Lee Yoon Ju
• Choi Soo Hong
• Jeon Kwang Hun

Classifications

• G09G3/3291 Primary

  in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements · CPC title

• G09G5/10 Primary

  Intensity circuits · CPC title

• G09G5/02

  characterised by the way in which colour is displayed {(details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607)} · CPC title

• G09G2330/12

  Test circuits or failure detection circuits included in a display system, as permanent part thereof · CPC title

• G09G2330/10

  Dealing with defective pixels · CPC title