Color correction liquid crystal display and method of driving same

• US 7,746,304 B2
• Filed: 08/31/2005
• Issued: 06/29/2010
• Est. Priority Date: 07/10/2001
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kwon, Su-Hyun, Lee, Seung-Woo, Kim, Jong-Seon
• Primary Examiner(s): Liang; Regina
• Application Number:
  US11/214,787
• Publication Number:
  US 20060007089A1
• Time in Patent Office: 1,763 Days
• Field of Search: 345 87- 89, 345/601, 345/602, 345/605, 345/690, 348/671, 348/674
• US Class Current: 345/89
• CPC Class Codes: G09G 2320/0276 for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
• CPC Class Codes: G09G 3/2055 the pattern being varied in time
• CPC Class Codes: G09G 3/3607 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127

Abstract

A liquid crystal display includes a liquid crystal display panel for displaying picture images, and a color correction unit. Upon receipt of raw RGB picture data corresponding to raw RGB gamma curves, the color correction unit generates corrected RGB picture data based on values over a predetermined imaginative gamma curve established in accordance with the characteristic of the liquid crystal display panel. The color correction unit stores values over corrected RGB gamma curves corresponding to the corrected picture data, and gamma-corrects the raw RGB picture data based on values over the stored corrected RGB gamma curves, thereby displaying the picture images.

Claims

1. A liquid crystal display comprising:

a liquid crystal display panel for displaying picture images and having a first gamma curve and a second gamma curve representing a first color and a second color respectively; and

a color correction unit;

wherein the color correction unit transforms a first input picture data of the first color and having a first gray value into a first output picture data of the first color and having a second gray value, and

wherein the first output picture data of the first color is gamma corrected according to the second gamma curve.

2. The liquid crystal display of claim 1, wherein the first color is blue or red, and the second color is green.

3. A liquid crystal display comprising:

a liquid crystal display panel for displaying picture images and having a first gamma curve and a second gamma curve representing a first color and a second color respectively; and

a color correction unit;

wherein the color correction unit transforms a first input picture data of the first color and having a first gray value into a first output picture data of the first color and having a second gray value,

wherein the first output picture data of the first color is gamma corrected according to an imaginary gamma curve with respect to the first input picture data, and

the imaginary gamma curve has a middle luminance value between the first gamma curve and the second gamma curve.

4. The liquid crystal display of claim 3, wherein the first gamma curve does not have a luminance value corresponding to the first input data on the second gamma curve.

5. The liquid crystal display of claim 3, wherein the first color is blue or red, and the second color is green.