Display apparatus having automatic adjusting apparatus

Details Display apparatus having automatic adjusting apparatus Display apparatus having automatic adjusting apparatus

1995-06-05

1996-11-26

Hjerpe, Richard

Computer graphics processing and selective visual display system

Display peripheral interface input device

Light pen for fluid matrix display panel

345213, G09G 512

Patent

active

055790291

ABSTRACT:
It is an object to enable an optimum video display to be obtained by automatically adjusting a display size and a display position of a video image no matter what kind of video signal is supplied. A comparator detects a video display period of a video signal a and generates a detection signal b. A counter, latch circuits, comparing circuits, and the like form information of the start position or end position of the video display period of the video signal a and period information of the video signal a. An arithmetic operation control circuit generates control information of the display size, display position, and the like from those information by arithmetic operations by using a detection signal b and a horizontal sync signal h. A memory holds the control information. The control information is read out when a power source of the display is turned on at the next time.

REFERENCES:
patent: 4777482 (1988-10-01), Kaneko et al.
patent: 4860246 (1989-08-01), Inoue
patent: 5021719 (1991-07-01), Arai et al.
patent: 5396258 (1995-03-01), Zenda
patent: 5448260 (1995-09-01), Zenda et al.

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