Patent attributes
In a liquid crystal display (LCD), a division point memory stores positional information about pixel division points that regularly divide X pixels and Y pixels on a display screen into sections. A gradation correction value memory stores gradation correction values that are prepared for the pixel division points and gradation division points, respectively, the gradation division points regularly dividing a maximum gradation level characteristic to the LCD into sections. A gradation level determination unit generates gradation level interpolation signals for pixel division points related to an input image signal according to the gradation correction values stored in the gradation correction value memory. A horizontal interpolation unit finds x-axis distances between a pixel position of the input image signal and positions of the pixel division points, and according to the found x-axis distances and the gradation level interpolation signals, generates horizontal interpolation signals. A vertical interpolation unit finds y-axis distances between the pixel position of the input image signal and the positions of the pixel division points, and according to the found y-axis distances and the horizontal interpolation signals, generates an image signal to be displayed on the LCD.
