| 摘要 |
PROBLEM TO BE SOLVED: To attain a backlight power saving function with a small logic amount using a histogram (frequency distribution data of light and darkness) in a driver of a liquid crystal display device. SOLUTION: The liquid crystal driver includes the backlight power saving function to obtain a display similar to an original image by extending display data in correlation with suppression of a backlight emission amount. In the liquid crystal driver, not all the pixel values (example: 0 to 255) but only the values (example: 179 to 255) of the significant partial range (N to 100%) have the data of the histogram of pixels of an image as a partial histogram, and when the pixel (Ds) at the significant t% rank order of the entire histogram is within the range of the partial histogram, the display driving circuit performs its operation in the same manner as in the case where it has the entire histogram, and when the pixel (Ds) is out of the range, the display driving circuit uses the range minimum value (N) in the place of the pixel of the significant t% rank order and performs its operation. COPYRIGHT: (C)2007,JPO&INPIT
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