Image display apparatus and driving method thereof

1. An image display apparatus comprising:

an image data processor detecting a first region from first image data input from an external source, adjusting a brightness of the first region and generating second image data; and

a display device for displaying the second region on a screen based upon the second image data provided from the image data processor, the brightness of the first region being different from the brightness of the other areas on the screen,

wherein the image data processor includes:

a first converter that converts the first image data in the RGB format into image data in a YUV format;

a moving image determiner that detects a second region by analyzing the brightness of the image data in the YUV format;

a sub-screen detector that detects the first region by detecting edges of the first region within the second region;

a data controller that adjusts the brightness of the image data in the YUV format corresponding to the first region; and

a second converter that converts the image data in the YUV format of which brightness is adjusted into the second image data in the RGB format and outputting the second image data.

2. The apparatus of claim 1 , wherein the first region displays a moving image.

3. The apparatus of claim 1 , wherein the moving image determiner divides the screen into a plurality of blocks to analyze the brightness of each block.

4. The apparatus of claim 1 , wherein the second region is equal to the first region or greater than the first region.

5. The apparatus of claim 1 , wherein the data controller increases the brightness of the image data in the YUV format corresponding to the first region.

6. The apparatus of claim 1 , wherein the data controller increases the brightness of the image data in the YUV format corresponding to the first region, and decreases the brightness of the image data in the YUV format corresponding to the other areas on the screen.

7. The apparatus of claim 1 , wherein the sub-screen detector performs a second derivation on a brightness signal of the second region, and detects edges of the first region.

8. The apparatus of claim 1 , wherein the data controller performs a sharpness compensation function for an image within the first region.

9. A method for driving an image display apparatus comprising:

converting first image data in an RGB format input from an external source into image data in a YUV format;

detecting a second region by analyzing the image data in the YUV format;

detecting a first region from the second region;

adjusting a brightness of the image data in the YUV format corresponding to the first region;

converting the brightness-adjusted image data in the YUV format into second image data in the RGB format; and

displaying an image according to the second image data in the RGB format.

10. The method of claim 9 , wherein the first region displays a moving image.

11. The method of claim 9 , further comprising:

when adjusting the image data in the YUV format corresponding to the first region, adjusting a brightness the image data in the YUV format corresponding to the second region.

12. The method of claim 9 , wherein the second region is detected by dividing a main screen into a plurality of blocks.

13. The method of claim 12 , wherein the second region is a sum of the blocks that includee any portion of the first region.

14. The method of claim 9 , wherein the first region is detected by detecting edges of the first region within the second region.