Multi-frequency displaying device for displaying both television

Details Multi-frequency displaying device for displaying both television Multi-frequency displaying device for displaying both television

1996-01-17

1997-03-11

Peng, John K.

Television

Basic receiver with additional function

Multimode

345213, H04M 327

Patent

active

056106637

ABSTRACT:
The present invention relates to a multi-frequency displaying device for displaying both TV and PC video signals. The displaying device comprises a displaying screen for displaying TV or PC video signals, a video signal processing circuit for converting the TV video signals into TV RGB signals and TV sync signals, a sync circuit for converting the TV sync signals or PC sync signals into vertical and horizontal deflection signals, and a display control circuit for displaying the TV RGB signals or PC RGB signals in the display screen in synchronization with the vertical and horizontal deflection signals. The sync circuit comprises a multi-frequency horizontal oscillator for generating clock signals to convert the TV sync signals or PC sync signals with different frequencies into the horizontal deflection signals according to the switch.

REFERENCES:
patent: 4460918 (1984-07-01), Flasza
patent: 4612574 (1986-09-01), Barnes
patent: 4679091 (1987-07-01), Kikuchi
patent: 4743958 (1988-05-01), Bannister et al.
patent: 5502503 (1996-03-01), Koz

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