Process method of image data for liquid crystal display

• US 20070279716A1
• Filed: 06/02/2006
• Published: 12/06/2007
• Est. Priority Date: 06/02/2006
• Status: Abandoned Application

• Current Assignee: Chunghwa Picture Tubes Limited
• Original Assignee: Chunghwa Picture Tubes Limited
• Inventors: Liu, Kuan-Hung, Wu, Chih-Lei
• Application Number:
  US11/445,278
• Publication Number:
  US 20070279716A1
• Time in Patent Office: Days
• US Class Current: 358/519
• CPC Class Codes: G02F 2203/30 Gray scale
• 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 2320/066 for control of contrast
• CPC Class Codes: G09G 3/2096 Details of the interface to the display terminal specific for a flat panel suitable for both CRT and flat panel G09G5/006; specific for a CRT G09G1/167
• CPC Class Codes: G09G 3/3688 suitable for active matrices only

Abstract

A processing method of dynamic contrast correction is applied to the process of an image display on a liquid crystal display. One or more threshold conditions are configured for analyzing and filtering the image data. The filtered image data is processed with the suitable contrast intensities to enhance the image displayed more natural.

Claims

1. A process method for image data displayed on a liquid crystal display, the process method comprising:

inputting an image data;

acquiring a histogram data of said image data;

distinguishing said histogram data, with a threshold condition, into a first data and a second data; and

correcting, based on said first data and said threshold condition, said first data to acquire a data of contract intensity.

2. The process method according to claim 1, wherein said threshold condition comprises two grayscale ranges, and said first data is out of said two grayscale ranges.

3. The process method according to claim 2, wherein said second data is within said two grayscale ranges.

4. The process method according to claim 2, wherein said two grayscale ranges comprise a first range of scale values from 0 to 16 and a second range of scale values from 239 to 255.

5. The process method according to claim 2, wherein the distinguishing step of threshold condition further comprises judging a ratio of said first data and said histogram data.

6. The process method according to claim 5, wherein when said ratio is lower than 10% the contrast intensity of said corrected first data is less than one when said ratio is higher than 10%.

7. The process method according to claim 2, wherein said threshold condition comprises a threshold value for distinguish a peak-to-peak difference of said first data.

8. The process method according to claim 7, wherein a contrast intensity of said first data with said peak-to-peak difference more than 80% is less than one of said first data with said peak-to-peak difference less than 80%.

9. A process method of modifying contrast intensity for liquid crystal display, the process method of modifying contrast intensity comprising:

inputting an image data;

acquiring a histogram data of said image data;

distinguishing said histogram data, with a threshold condition, into a first data and a second data, wherein a continuous grayscale values of said first data is within discontinuous grayscale values of said second data; and

correcting, based on said first data and said threshold condition, said first data to acquire a data of contract intensity.

10. The process method of modifying contrast intensity according to claim 9, wherein said discontinuous grayscale values of said second data comprise a first range of scale values from 0 to 16 and a second range of scale values from 239 to 255.

11. The process method of modifying contrast intensity according to claim 9, wherein said threshold condition further comprises configured for judging a ratio of said first data and said histogram data.

12. The process method of modifying contrast intensity according to claim 11, wherein when said ratio is lower than 10% the contrast intensity of said corrected first data is less than one when said ratio is higher than 10%.

13. The process method of modifying contrast intensity according to claim 9, wherein said threshold condition comprises a threshold value for distinguish a peak-to-peak difference of said first data.

14. The process method of modifying contrast intensity according to claim 13, wherein a contrast intensity of said first data with said peak-to-peak difference more than 80% is less than one of said first data with said peak-to-peak difference less than 80%