Liquid crystal display device and driving method thereof
First Claim
1. A local dimming LCD device comprising:
- a display panel comprising a plurality of pixels;
a panel driver configured to drive each of the plurality of pixels;
a plurality of backlights, the plurality of backlights respectively corresponding to a plurality of regions of the display panel and being configured to respectively emit light to each of the plurality of regions;
a backlight driver configured to drive the plurality of backlights based on gray level information of the plurality of pixels corresponding to the plurality of regions; and
a processor configured to calculate a first amount of light to be incident on each pixel based on the gray level of each pixel, to calculate a second amount of light incident on each pixel according to a driving state of the plurality of backlights, to change a gray level of at least one of the plurality of pixels based on a difference between the first amount of light and the second amount of light, and to control the panel driver based on the changed gray level.
2 Assignments
0 Petitions
Accused Products
Abstract
Disclosed is a local dimming liquid crystal display device. The present local dimming liquid crystal display device comprises a display panel unit having a plurality of pixels; a panel driving unit for driving each of the plurality of pixels; a backlight unit comprising a plurality of backlights for dividing the display panel unit into a plurality of areas to emit light to each of the plurality of regions; a backlight driving unit for driving the plurality of backlights on the basis of gray level information of the plurality of pixels corresponding to each of the plurality of areas; and a processor for calculating a first amount of light to be incident on each pixel on the basis of the gray level of each pixel, calculating a second amount of light incident on each pixel in accordance with a driving state of the plurality of back-lights, changing the gray level of at least one of the plurality of pixels on the basis of the difference between the first amount of light and the second amount of light, and controlling the panel driving unit on the basis of the changed gray level.
10 Citations
20 Claims
-
1. A local dimming LCD device comprising:
-
a display panel comprising a plurality of pixels; a panel driver configured to drive each of the plurality of pixels; a plurality of backlights, the plurality of backlights respectively corresponding to a plurality of regions of the display panel and being configured to respectively emit light to each of the plurality of regions; a backlight driver configured to drive the plurality of backlights based on gray level information of the plurality of pixels corresponding to the plurality of regions; and a processor configured to calculate a first amount of light to be incident on each pixel based on the gray level of each pixel, to calculate a second amount of light incident on each pixel according to a driving state of the plurality of backlights, to change a gray level of at least one of the plurality of pixels based on a difference between the first amount of light and the second amount of light, and to control the panel driver based on the changed gray level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 16, 17, 18, 19)
-
-
10. A driving method of a local dimming LCD device comprising a plurality of backlights configured to respectively emit light to a plurality of regions of a display panel, the method comprising:
-
driving the plurality of backlights based on gray level information of a plurality of pixels corresponding to the plurality of regions; calculating a first amount of light to be incident on each pixel based on the gray level of each pixel; calculating a second amount of light incident on each pixel according to a driving state of the plurality of backlights; changing a gray level of at least one of the plurality of pixels based on a difference between the first amount of light and the second amount of light; and representing the plurality of pixels based on the changed gray level. - View Dependent Claims (11, 12, 13, 14, 15)
-
-
20. A non-transitory computer readable medium storing a program, which when executed by a processor of a local dimming LCD device that includes a plurality of backlights configured to respectively emit light to a plurality of regions of a display panel, performs:
-
driving the plurality of backlights based on gray level information of a plurality of pixels corresponding to the plurality of regions; calculating a first amount of light to be incident on each pixel based on the gray level of each pixel; calculating a second amount of light incident on each pixel according to a driving state of the plurality of backlights; changing a gray level of at least one of the plurality of pixels based on a difference between the first amount of light and the second amount of light; and representing the plurality of pixels based on the changed gray level.
-
Specification