DRIVING METHOD OF LIQUID CRYSTAL DISPLAY

• US 20100001945A1
• Filed: 12/29/2008
• Published: 01/07/2010
• Est. Priority Date: 07/03/2008
• Status: Abandoned Application

• Current Assignee: Chunghwa Picture Tubes Limited (Tatung Co., Ltd.)
• Original Assignee: Chunghwa Picture Tubes Limited (Tatung Co., Ltd.)
• Inventors: Lin, Ming-Chang, Lin, Chi-Hsiu, Yen, Shih-Chieh, Fang, Chia-Chun
• Application Number:
  US12/345,651
• Publication Number:
  US 20100001945A1
• Time in Patent Office: Days
• US Class Current: 345/102
• CPC Class Codes: G09G 2310/024 Scrolling of light from the illumination source over the display in combination with the scanning of the display screen
• CPC Class Codes: G09G 2320/062 Adjustment of illumination source parameters
• CPC Class Codes: G09G 3/3426 the different display panel areas being distributed in two dimensions, e.g. matrix
• CPC Class Codes: G09G 3/36 using liquid crystals

Abstract

A driving method of an LCD includes: dividing a display panel into a plurality of scanning blocks, each scanning block including a plurality of display regions; selecting one of the scanning blocks as a target scanning block, wherein each display region of the target scanning block corresponds to at least one backlight source; and selecting one of the display regions of the target scanning block as a target display region, detecting a gray value of an image of the target display region, and adjusting a luminance of a target backlight source corresponding to the target display region according to the gray value of the image.

Claims

1. A driving method of a liquid crystal display (LCD), comprising:

dividing a display panel into a plurality of scanning blocks, each scanning block including a plurality of display regions;

selecting one of the scanning blocks as a target scanning block, wherein each display region of the target scanning block corresponds to at least one backlight source; and

selecting one of the display regions of the target scanning block as a target display region, detecting a gray value of an image of the target display region, and adjusting a luminance of a target backlight source corresponding to the target display region according to the gray value of the image.

2. The driving method of claim 1, wherein the backlight source is a light-emitting diode (LED).

3. The driving method of claim 1, wherein the display panel is a liquid crystal display panel.

4. The driving method of claim 1, wherein the step of detecting the gray value of the image of the target display region comprises:

detecting a maximum gray value of the image of the target display region.

5. The driving method of claim 4, wherein the step of adjusting the luminance of the target backlight source corresponding to the target display region according to the gray value of the image comprises:

adjusting the luminance of the target backlight source according to a positive correlation between the luminance of the target backlight source and the maximum gray value of the image of the target display region.

6. The driving method of claim 1, wherein the step of adjusting the luminance of the target backlight source corresponding to the target display region according to the gray value of the image comprise:

determining a timing of the image of the target display region;

calculating the luminance of the target backlight source according to the gray value of the image of the target display region; and

adjusting the luminance of the backlight source according to the timing of the image and the calculated luminance of the target backlight source.