| 摘要 |
PROBLEM TO BE SOLVED: To improve the picture quality of a liquid crystal display device by generating gamma reference voltages for each of R, G and B which are independent of one another. SOLUTION: A digital gamma storage part is provided with digital gamma data for each of R, G and B from an external device through a specified data bus according to a specified gamma load signal and stores them. A gamma reference voltage generation part generates gamma reference voltages for gradation display, which are used to convert digital data into analog data, for each of R, G and B independently, according to the stored digital gamma data for each of R, G and B. Further, a digital-analog converter converts image data for each of R, G and B into analog voltages according to the generated gamma reference voltages and outputs them. COPYRIGHT: (C)2003,JPO
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