Input signal switching circuit of a monitor and switching method

Details Input signal switching circuit of a monitor and switching method Input signal switching circuit of a monitor and switching method

1996-11-15

1998-07-14

Powell, Mark R.

Television

Image signal processing circuitry specific to television

Switching

248705, H04N 5268

Patent

active

057812500

ABSTRACT:
An automatic input signal switching circuit of a monitor having a BNC (binary number code) signal terminal and a D-sub (D type-sub miniature connector) signal terminal and a switching method thereof, the circuit having a video signal switch receiving video signals from the BNC signal terminal and the D-sub signal terminal, a video signal processor receiving one of the video signals from the BNC signal terminal and the D-sub signal terminal, the received video signal being selected at the video signal switch, a synchronization signal switch receiving a vertical synchronization signal and a horizontal synchronization signal from the BNC signal terminal and a vertical synchronization signal and a horizontal synchronization signal from the D-sub signal terminal, a detector receiving a detection signal representing a connection state between the D-sub signal terminal and a personal computer, a microcomputer receiving an output of the detector, for generating a control signal, and a switching controller receiving the control signal, for controlling the video signal switch and the synchronization signal switch.

REFERENCES:
patent: 4903129 (1990-02-01), Bell et al.
patent: 5091784 (1992-02-01), Someya et al.
patent: 5258839 (1993-11-01), Bae
patent: 5287186 (1994-02-01), Takamori
patent: 5345272 (1994-09-01), Ersoz et al.
patent: 5526017 (1996-06-01), Wilkie
patent: 5648799 (1997-07-01), Kikinis

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