| 摘要 |
PROBLEM TO BE SOLVED: To improve installation space efficiency by performing wiring omission by superimposing the whole screen adjustment control signals other than a video signal and horizontally and vertically synchronizing signals on a vertical scan line in a vertical flyback period, etc., corresponding to the outside the frame limit which does not contribute to a displayed image outside the display screen of a displaying part. SOLUTION: In a video signal outputted from a video generating part, the whole screen adjustment control signals other than a video signal and horizontally and vertically synchronizing signals are superimposed upon a horizontal scan line in a vertical flyback period, etc., corresponding to the outside the frame limit which does not contribute to a displayed image outside the display screen of a displaying part. For instance, in this display device, three mode designation signals MODS, MODW and MODN for designating a screen mode of a displayed image are superimposed on a vertical flyback period outside the frame which does not contribute to the displayed image in a NTCS system video signal, and a screen display mode is switched based on them. A video processing circuit 12 performs prescribed processing of an analog system video signal given from a car navigation device 11.
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