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TV/VCR의 영상신호 자동전환 방법How to automatically switch video signal of TV / VCR
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제1도는 본 발명 방법에 적용되는 영상신호 자동전환 장치의 블록구성도.1 is a block diagram of a video signal automatic switching device applied to the method of the present invention.
제2도는 본 발명 방법의 설명하기 위한 플로우차트.2 is a flowchart for explaining the method of the present invention.
Claims (1)
외부영상신호의 유·무에 따라 스위치(SW1)가 온/오프되어 인터럽트(INT)의 로직상태를 판별하는 제1과정과, 상기 제1과정에서 인터럽트(INT)가 로울레벨로 걸리면 전원부(2)를 온시킴과 동시에 입력 영상신호 상태를 판별하는 제2과정과, 상기 제2과정에서 TV영상신호가 인가되면 외부영상신호로 전환시키고 외부영상이면 그대로 출력시키는 제3과정으로 이루어진 TV/VCR의 영상신호 자동전환방법A first process of determining the logic state of the interrupt INT by switching the switch SW1 on / off according to the presence / absence of an external video signal; and in the first process, when the interrupt INT is at a low level, the power supply unit 2 And a third process of determining a state of an input video signal at the same time, and a third process of converting an external video signal when the TV video signal is applied in the second process and outputting the external video signal as it is. Video signal automatic switching method※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임※ Note: The disclosure is based on the initial application.
KR1019910007943A1991-05-161991-05-16
How to automatically switch video signal of TV / VCR
KR920022856A
(en)