Automatic synchronization switch for side-by-side displays

Details Automatic synchronization switch for side-by-side displays Automatic synchronization switch for side-by-side displays

1994-06-03

1996-11-19

Metjahic, Safet

Television

Synchronization

Control of picture position

348540, 348556, 348564, 348634, 348639, H04N 974

Patent

active

055767699

ABSTRACT:
A video display system comprises a video display for simultaneously displaying pictures representative of first and second video signals, having first and second synchronizing signals respectively. A switch selectably couples the video display with one of the first and second synchronizing signals. A horizontal synchronizing component of the first synchronizing signal is detected by a sensing circuit, the switch being responsive to the sensing circuit. The video display is synchronized with the first synchronizing signal when the horizontal synchronizing component of the first video signal is sensed and is otherwise synchronized with the second synchronizing signal.

REFERENCES:
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patent: 4677484 (1987-06-01), Pitsch et al.
patent: 4750039 (1988-06-01), Willis
patent: 4811103 (1989-03-01), Casey
patent: 4837623 (1989-06-01), Motoyama
patent: 4984082 (1991-01-01), Okamura
patent: 5130800 (1992-07-01), Johnson et al.
patent: 5293222 (1994-03-01), Yang
Patent Abstracts of Japan, vol. 13, No. 110 (E-728) (3458) 16 Mar. 1989 (corresponds to Item AL above).
Patent Abstracts of Japan, vol. 14, No. 210 (E-922) 27 Apr. 1990 (corresponds to Item AN above).

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