KR970019481A

KR970019481A - On-Screen Display Character Position Adjustment Circuit Without Signal

Info

Publication number: KR970019481A
Application number: KR1019950033354A
Authority: KR
Inventors: 박현수
Original assignee: 배순훈; 대우전자주식회사
Priority date: 1995-09-30
Filing date: 1995-09-30
Publication date: 1997-04-30

Abstract

본 발명은 무신호시 OSD 문자위치 조정회로에 관한 것으로서, 영상처리IC, 마이콤과 키입력부를 구비한 텔레비젼 수상기에 있어서, 영상처리IC에 입력되는 영상신호로 부터 동기신호를 분리하여 무신호상태를 판단하여 소정의 절환신호를 출력하기 위한 동기분리부, 시정수를 변화시키기 위한 시정수 변환부와, 동기분리부에 의해 무신호 입력으로 판단된 경우 시정수 변환부와 마이콤의 수직동기신호 입력단을 접속하여 시정수에 의해 수직동기신호의 기준점을 가변시킴으로써 OSD 문자가 유효 수직사이즈 내에 위치하도록 하는 스위치를 구비한다. 따라서, 무신호 입력시 마이콤에 인가되는 수직동기신호(V-sync)의 기준점을 가변시킴으로써 OSD 문자가 유효 수직사이즈 내에 위치하도록 하고, 무신호 입력이 아닌 경우에는 OSD 문자는 원래의 화면 위치 즉, 수직 상부에 위치하도록 제어함으로써 입력되는 신호의 유무에 상관없이 사용자가 OSD 문자를 식별할 수 있다.The present invention relates to a non-signal-on-screen OSD character position adjusting circuit. In a television receiver having an image processing IC, a microcomputer, and a key input unit, a signal is separated from a video signal input to the image processing IC. A synchronous separator for judging and outputting a predetermined switching signal, a time constant converter for changing the time constant, and a time constant converter and a vertical synchronous signal input terminal of the microcomputer And a switch for varying the reference point of the vertical synchronization signal by the time constant so that the OSD characters are located within the effective vertical size. Therefore, by changing the reference point of the vertical synchronization signal (V-sync) applied to the microcomputer during no signal input, the OSD character is located within the effective vertical size, and when the non-signal input is not the OSD character is the original screen position, that is, By controlling the position above the vertical, the user can identify the OSD character with or without the input signal.

Description

On-Screen Display Character Position Adjustment Circuit Without Signal

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제3도는 본 발명에 의한 무신호시 OSD 문자위치 조정회로를 나타낸 블럭도이다.3 is a block diagram showing a non-signal-on-screen OSD character position adjusting circuit according to the present invention.

Claims

Image processing IC that performs operations such as image detection, image amplification and chroma processing on input video signal, various video and audio control, channel selection, PIP board control, power on / off, audio mode selection, A / V A television receiver having a microcomputer for performing a function such as switching and OSD and a key input unit for applying a command for generating an OSD character to the microcomputer, wherein the synchronization signal is separated from the video signal input to the image processing IC. A synchronization separator 9 for determining a non-signal state and outputting a predetermined switching signal; A time constant converting unit 10 for changing the time constant; And when the non-signal input is determined by the synchronization separator, the time constant converter and the vertical synchronization signal input terminal of the microcomputer are connected to change the reference point of the vertical synchronization signal by the time constant so that the OSD character is within the effective vertical size. On-signal OSD character position adjustment circuit, characterized in that it comprises a switch (SW1) to position.

※ Note: The disclosure is based on the initial application.