| 摘要 |
PURPOSE: A flat panel display device is provided to change and update the part of the display image with low power consumption by operating the random writing mode for updating the image partially per block. CONSTITUTION: A flat panel display device includes a matrix array of display pixels which respectively have memory elements, a vertical decoder(110) which selectively designates row blocks of the display pixels, a horizontal decoder(120) which selectively designates column blocks of the display pixels, a video RAM(80) which stores image data respectively assigned to the memory elements, and a controller(60) which controls the vertical and horizontal decoders to write the contents of the video RAM in units of blocks specified by row and column block addresses. The device further includes an interface(90) which determines a rewriting range corresponding to at least one block of the display pixels including display pixels for part of the image data when the part is updated in the video RAM, and supplies to the controller the image data assigned to each block within the rewriting range.
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