Method for compensating image information

Patent metadata

Field	Value
Publication number	US-10388229-B2
Application number	US-201816170422-A
Country	US
Kind code	B2
Filing date	Oct 25, 2018
Priority date	Jan 27, 2015
Publication date	Aug 20, 2019
Grant date	Aug 20, 2019

Abstract

A method for controlling a display panel includes calculating an on-pixel ratio based on gamma information corresponding to image information, providing maximum current information based on a dimming level, calculating an average current of the display panel based on the on-pixel ratio and the maximum current information, and providing pixel average current information for each of a plurality of pixels in the display panel. The on-pixel ratio is based on the turned-on pixels of the pixels in the display panel. The pixel average current information is determined based on the average current of the display panel.

First claim

What is claimed is:

1. A method for compensating image information, the method comprising:
calculating an on-pixel ratio based on gamma information corresponding to image information, the on-pixel ratio being based on turned-on pixels among a plurality of pixels in a display panel;
providing maximum current information corresponding to a dimming level of the display panel using a max current look-up table, the maximum current information corresponding to the dimming level of the display panel being stored in the max current look-up table;
calculating an average current of the display panel by multiplying the on-pixel ratio and a maximum current value corresponding to the maximum current information;
determining pixel average current information for each of the pixels based on the average current of the display panel using a pixel average current look-up table; and
compensating the gamma information corresponding to the image information based on the pixel average current information for each of the pixels.

2. The method as claimed in claim 1 , further comprising:
generating a compensation constant for compensating the gamma information based on the pixel average current information for each of the pixels.

3. The method as claimed in claim 1 , further comprising:
storing the pixel average current information for each of the pixels in a pixel average current look-up table; and
updating the pixel average current information in the pixel average current look-up table at a predetermined time interval.

4. The method as claimed in claim 1 , further comprising:
storing the maximum current information corresponding to the dimming level in a maximum current look-up table, and
increasing a maximum current value corresponding to the maximum current information as the dimming level increases.

Assignees

• Samsung Display Co Ltd

Inventors

• Park Jin-Woo
• Bang Sung-Hoon

Classifications

• G09G2320/0276

  for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction · CPC title

• G09G2320/0271

  Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping · CPC title

• G09G2360/16

  Calculation or use of calculated indices related to luminance levels in display data · CPC title

• G09G2320/048

  using evaluation of the usage time · CPC title

• G09G3/3283 Primary

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