Method and apparatus for driving liquid crystal display device
First Claim
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1. An apparatus for driving a liquid crystal, 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 divided into a plurality of regions in accordance with a driving voltage or current, wherein the backlight comprises a plurality of lamps, each of the lamps providing light to a different region of the plurality of regions; and
an inverter that supplies the driving voltage or current to the backlight;
wherein the picture quality improving unit controls individually the plurality of lamps so that light proportional to the brightness of the each region is supplied to the liquid crystal panel from 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.
73 Citations
25 Claims
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1. An apparatus for driving a liquid crystal, 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 divided into a plurality of regions in accordance with a driving voltage or current, wherein the backlight comprises a plurality of lamps, each of the lamps providing light to a different region of the plurality of regions; and an inverter that supplies the driving voltage or current to the backlight; wherein the picture quality improving unit controls individually the plurality of lamps so that light proportional to the brightness of the each region is supplied to the liquid crystal panel from the backlight. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An apparatus that increases contrast of images displayed in a liquid crystal display, comprising:
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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; a data driver that supplies the second data to liquid crystal cells of a liquid crystal panel of the liquid crystal display; a backlight that supplies light to the liquid crystal panel divided into a plurality of regions, wherein the backlight comprises a plurality of lamps, each of the lamps providing light to a different region of the plurality of regions; and wherein the picture quality improving unit controls individually the plurality of lamps so that light proportional to the brightness of the each region is supplied to the liquid crystal panel from the backlight. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification