Method and apparatus for driving liquid crystal display device
First Claim
1. An apparatus for driving a liquid crystal display, comprising:
- a picture quality improving unit that receives first data, extracts a brightness component for at least one liquid crystal cell of the liquid crystal display from the first data, analyzes brightness of the first data using the extracted brightness component, and generates second data having a contrast extended from that of the first data in accordance with the analyzed brightness;
a timing controller that rearranges the second data to supply the second data to a data driver;
a backlight that supplies light to the liquid crystal panel in accordance with a driving voltage or current; and
an inverter that supplies the driving voltage or current to the backlight.
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Abstract
An apparatus for driving a liquid crystal display includes a picture quality improving unit that extracts a brightness component from first data, analyzes the brightness using the extracted brightness component, and generates second data having a contrast in accordance with the analyzed brightness. The contrast of the second data is extended from that of the first data. A timing controller rearranges the second data to supply the second data to a data driver. A backlight supplies the light to a liquid crystal panel in accordance with a driving current. An inverter supplies the driving current to the backlight.
98 Citations
46 Claims
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1. An apparatus for driving a liquid crystal display, comprising:
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a picture quality improving unit that receives first data, extracts a brightness component for at least one liquid crystal cell of the liquid crystal display from the first data, analyzes brightness of the first data using the extracted brightness component, and generates second data having a contrast extended from that of the first data in accordance with the analyzed brightness;
a timing controller that rearranges the second data to supply the second data to a data driver;
a backlight that supplies light to the liquid crystal panel in accordance with a driving voltage or current; and
an inverter that supplies the driving voltage or current to the backlight. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for driving a liquid crystal display comprising:
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accumulating received first data into a histogram corresponding to a gray scale to analyze brightness information;
converting the first data into second data having a contrast extended from that of the first data using the brightness information; and
rearranging the second data and supplying the second data to a data driver. - View Dependent Claims (15, 16, 17, 18)
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19. A method for driving a liquid crystal display comprising:
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converting received first data of each of a plurality of liquid crystal cells in a liquid crystal panel into a brightness component and a color-difference component;
accumulating the brightness components of a frame into a histogram to analyze brightness information;
altering the histogram such that a contrast of each of at least some of the brightness components is extended to generate a converted brightness component;
generating second data of which the contrast is extended using the converted brightness component and the associated color-difference component; and
rearranging the second data and supplying the second data to the liquid crystal panel through a data driver. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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- 31. An apparatus that increases contrast of images displayed in a liquid crystal display, comprising a picture quality improving unit that extracts a brightness component from received first data, generates a modified brightness component having a different gray scale value than the brightness component, and produces second data using the modified brightness component, wherein an image produced using the second data has a higher contrast than an image produced using the first data.
Specification