| 摘要 |
PROBLEM TO BE SOLVED: To increase the redrawing speed of picture resetting when the power source of a monitor is turned off or a channel is changed by reducing the colors of a graphics image displayed right before redrawing, and storing the graphics image. SOLUTION: When a power-OFF indication is inputted from a remote control photodetection part 102, the remote control photodetection part 102 informs a power source processing part 113 of it and further the power source processing part 112 informs a memory interface 108, a color reducing process part 111, and a display processing part 112. The color reducing process part 111 reads in the displayed graphics data from an external memory 105 once the power- OFF indication is inputted. The addresses of a graphics display area needed for the read are set in registers of the memory interface part 108. The read-out graphics data are processed by color reduction using a conversion table indicated by the CPU 115 and written to a free area of the external memory 105 through the memory interface part 108 again.
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