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Liquid crystal driving voltage generator of Liquid Crystal Display providing for minimizing contrast variation by temperature compensation and method thereof
Liquid crystal driving voltage generator of Liquid Crystal Display providing for minimizing contrast variation by temperature compensation and method thereof
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机译:液晶显示器的液晶驱动电压发生器及其方法,通过温度补偿使对比度变化最小化
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摘要
PURPOSE: A liquid crystal driving voltage generator minimizing contrast variation by temperature compensation and its method are provided which senses external temperature and applies a temperature coefficient(k) of a reference driving voltage according to temperature variation differently, depending on external temperature variation. CONSTITUTION: A reference voltage generation part(110) generates a reference DC voltage and a reference temperature display voltage varying according to external temperature variation, and generates a reference liquid crystal driving voltage by processing a reference gray voltage corresponding to selected temperature coefficient information. The first amplifier(120) outputs a liquid crystal voltage by amplifying the reference liquid crystal driving voltage. The second amplifier(130) outputs a reference temperature voltage by amplifying the reference DC voltage. The third amplifier(140) outputs a temperature display voltage by amplifying the reference temperature display voltage. And a temperature coefficient selection part(150) generates 3 bit latch input information and selects an external input temperature coefficient corresponding to the 3 bit latch input information, and outputs the selected temperature coefficient information.
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