Image display device and driving method for thereof

1. A driving method of an image display device, the comprising:

separating left-eye image data and right-eye image data from an input image signal;

analyzing the left-eye image data and right-eye image data to acquire brightness of a left-eye image and brightness of a right-eye image;

acquiring, by a distance measurement sensor, a viewing distance between a viewer and a screen which displays the left-eye image and right-eye image;

adjusting a moved distance of a pixel in the left-eye image and right-eye image, on the basis of at least one of the brightness of the left-eye image, and the brightness of the right-eye image, and the viewing distance; and

dividing and displaying a left-eye image and right-eye image with respective adjusted depths thereof, in one of time or space,

wherein when a brightness of a displayed image is constant, a pixel movement distance of the image according to the viewing distance increases is increased, or when the viewing distance is constant, the pixel movement distance of the image as the brightness of the image increases is increased.

2. The driving method according to claim 1 , wherein the adjusting of a moved distance comprises adjusting the moved distance of the pixel in the left-eye image and right-eye image to adjust a depth of an image according to brightness of the image, within a maximum depth where accommodation and convergence of the viewer's eyes are matched.

3. The driving method according to claim 1 , wherein the adjusting of a moved distance comprises adjusting the moved distance of the pixel in the left-eye image and right-eye image to adjust a depth of an image according to the viewing distance, within a maximum depth where accommodation and convergence of the viewer's eyes are matched.

4. The driving method according to claim 1 , wherein the moved distance of the pixel is adjusted in proportion to the viewing distance and the brightness of the left-eye image and right-eye image.

5. An image display device comprising:

an image separation unit separating left-eye image data and right-eye image data from an input image signal;

a brightness analysis unit analyzing the left-eye image data and right-eye image data to calculate brightness of a left-eye image and brightness of a right-eye image;

a distance measurement unit acquiring a viewing distance between a viewer and a screen which displays the image;

an image depth adjustment unit adjusting a moved distance of a pixel in the left-eye image and right-eye image on the basis of at least one of the brightness of the left-eye image, the brightness of the right-eye image, and the viewing distance, and adjusting depths of the left-eye image and right-eye image according to the moved distance of the pixel;

a liquid crystal panel dividing and displaying the left-eye image and right-eye image with respective adjusted depths thereof, in one of time or space; and

Three-Dimensional (3D) special glasses selectively transmitting the left-eye image and right-eye image with respective adjusted depths thereof,

wherein the image depth adjustment unit is configured to, when a brightness of a displayed image is constant, increase a pixel movement distance of the image as the viewing distance increases, or when the viewing distance is constant, increase the pixel movement distance of the image as the brightness of the image increases.

6. The image display device according to claim 5 , wherein the image depth adjustment unit adjusts the moved distance of the pixel in the left-eye image and right-eye image according to the brightness of the left-eye image and right-eye image, within a maximum depth where accommodation and convergence of the viewer's eyes are matched.

7. The image display device according to claim 5 , wherein the image depth adjustment unit adjusts the moved distance of the pixel in the left-eye image and right-eye image according to the viewing distance, within a maximum depth where accommodation and convergence of the viewer's eyes are matched.

8. The image display device according to claim 5 , wherein the image depth adjustment unit adjusts the moved distance of the pixel in proportion to the viewing distance and/or the brightness of the left-eye image and right-eye image.

9. The image display device according to claim 5 , wherein the distance measurement unit comprises a distance measurement sensor disposed at an external case of the image display device, or comprises a distance measurement sensor disposed at the 3D special glasses.