KR950022887A

KR950022887A - TV automatic channel setting device

Info

Publication number: KR950022887A
Application number: KR1019930029553A
Authority: KR
Inventors: 최동수
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1993-12-24
Filing date: 1993-12-24
Publication date: 1995-07-28
Also published as: KR960005934B1

Abstract

본 발명은 시청할 유효채널이 자동으로 설정되도록 한 텔레비젼의 자동 채널설정장치에 관한 것으로, 채널의 선택신호를 수신하는 채널신호 수신부(1)와, 채널선택을 위한 국부발진을 행하는 PLL(Phase Locked Loop) IC(2), 이 PLL IC(2)의 국부발진 주파수를 제어하는 PLL 제어부93), 상기 PLL IC(2)의 국부발진 신호와 소정의 RF 신호로부터 선택된 채널에 대한 중간주파 신호를 검출하는 믹서부(4), 이 믹섭(4)에서 출력되는 중간주파신호로부터 복합영상 신호를 생성하는 영상신호 처리부(5), 이 영상신호 처리부(5)로부터 수평동기신호를 검출하는 동기신호 검출부(6), 상기 채널신호 수신부(1)의 채널선택신호에 따라 상기 PLL 제어부(3)로 소정의 제어신호를 출력하는 한편 상기 동기신호 검출부(6)의 검출신호를 근거로 방송의 유무를 판별하고 일정시간 경과후에 해당채널을 유효채널로 설정하는 제어부(7), 이 제어부(7)에 의해 설정된 유효채널을 저장하는 메모리(8)를 포함하여 구성된 것을 특징으로 한다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic channel setting apparatus for televisions in which an effective channel to be watched is automatically set. ) An IC 2, a PLL controller 93 for controlling a local oscillation frequency of the PLL IC 2, and an intermediate frequency signal for a channel selected from a local oscillation signal of the PLL IC 2 and a predetermined RF signal. A mixer section 4, a video signal processor 5 for generating a composite video signal from the intermediate frequency signal output from the mixer 4, and a sync signal detector 6 for detecting a horizontal sync signal from the video signal processor 5 ) Outputs a predetermined control signal to the PLL controller 3 according to the channel selection signal of the channel signal receiver 1, and determines the presence or absence of broadcast based on the detection signal of the synchronization signal detector 6. After time passes And a memory 8 for storing the effective channel set by the control unit 7.

Description

TV automatic channel setting device

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

제1도는 본 발명의 텔레비젼의 채널 자동설정 장치를 나타낸 블럭구성도.1 is a block diagram showing a channel automatic setting apparatus for a television of the present invention.

Claims

A channel signal receiver 1 for receiving a channel selection signal, a phase locked loop (PLL) IC 2 for local oscillation for channel selection, and a PLL controller 3 for controlling the local oscillation frequency of the PLL IC 2; ), A mixer unit 4 for detecting an intermediate frequency signal for a channel selected from the local oscillation signal of the PLL IC 2 and a predetermined RF signal, and a composite video signal from the intermediate frequency signal output from the mixer unit 4. A video signal processor (5) for generating a signal, a sync signal detector (6) for detecting a horizontal synchronization signal from the video signal processor (5), and the PLL controller (3) in accordance with a channel selection signal of the channel signal receiver (1). A control unit 7 which outputs a predetermined control signal and determines whether there is a broadcast based on the detection signal of the synchronization signal detection unit 6, and sets the corresponding channel as an effective channel after a predetermined time has elapsed. Memory (8) for storing the effective channel set by The automatic channel-setting device, characterized in that configured to hereinafter.

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