KR980007563A

KR980007563A - Sub-beam gain control device of sub-screen television receiver

Info

Publication number: KR980007563A
Application number: KR1019960023374A
Authority: KR
Inventors: 정희석
Original assignee: 배순훈; 대우전자주식회사
Priority date: 1996-06-24
Filing date: 1996-06-24
Publication date: 1998-03-30

Abstract

본발명은 부화면 텔레비전 수상기에서 서브빔의 크기를 검출한 후에 독립적으로 이득을 제어할 수 있도록한 부화면 텔레비전 수상기의 서브빔 이득제어장치에 관한 것이다. 본발명의 부화면 텔레비젼 수상기의 서브빔 이득제어장치는 주화면에 대한 영상신호와 부화면에 대한 영상신호를 블랭킹펄스에 동기하여 합성하고 이렇게 합성된 신호를 처리하여 주화면을 일부 구획한 부분에 부화면을 발생시키며, 전자총에서 출력되는 빔량을 검출한 후에 이렇게 검출된 빔량에 의거하여 주화면에 대한 휘도를 자동으로 제한하는 기능을 구비한 부화면 텔레비젼 수상기에 있어서, 서브빔의 량을 검출하는 서브빔량 검출부, 메인빔의 량을 검출하는 메인빔량 검출부 및 상기 검출된 서브빔량에 의거하여 부화면의 휘도를 제한하는 이득비 조절수단을 구비한 것을 특징으로 한다.The present invention relates to a sub-beam gain control apparatus of a sub-screen television receiver which enables the gain to be controlled independently after detecting the size of the sub-beam in the sub-screen television receiver. The sub-beam gain control apparatus of the sub-screen television receiver of the present invention synthesizes the video signal for the main screen and the video signal for the sub-screen in synchronization with the blanking pulses, and processes the synthesized signal in a part of the main screen. A sub-screen television receiver having a function of generating a sub-screen and detecting the beam amount output from the electron gun and automatically limiting the luminance of the main screen based on the detected beam amount, wherein the sub-screen amount is detected. And a sub-beam amount detecting unit, a main beam amount detecting unit detecting the amount of the main beam, and gain ratio adjusting means for limiting the luminance of the sub-screen based on the detected sub-beam amount.

Description

Sub-beam gain control device of sub-screen television receiver

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 종래의 자동휘도제한기능을 가지는 부화면 텔레비젼 수상기의 블록구성도.1 is a block diagram of a conventional sub-screen television receiver having an automatic luminance limitation function.

제2도는 본발명의 양호한 실시예에 따른 서브빔 이득제어장치가 부가된 부화면 텔레비젼 수상기의 블록구성도.2 is a block diagram of a sub-screen television receiver to which a sub-beam gain control apparatus according to a preferred embodiment of the present invention is added.

제3도는 제2에서 메인빔량 검출부 및 서브빔량 검출부의 상세회로도.3 is a detailed circuit diagram of a main beam amount detector and a sub-beam amount detector in FIG. 2;

제4도는 제2도의 동작을 설명하기 위한 파형도.4 is a waveform diagram for explaining the operation of FIG.

Claims

The video signal for the main picture and the video signal for the sub picture are synthesized by synchronizing the blanking pulses with the blanking pulses, and processing the synthesized signals to generate a sub picture in a part of the main picture, which is output from the electron gun. A sub-screen television receiver having a function of automatically limiting luminance on the main screen based on the detected beam amount after detecting the beam amount, wherein the sub-beam amount detector detects the amount of the sub-beam, and detects the amount of the main beam. And a gain ratio adjusting means for limiting the brightness of the sub-screen based on the detected sub-beam amount.

2. The blanking pulse of claim 1, wherein the main beam detection unit and the sub beam detection unit supply two switching circuits in which inputs are switched in synchronization with the blanking pulses, and a blanking pulse supplied to any one of the switching circuits to selectively perform the input switching operation. A sub-beam gain control apparatus for a sub-screen television receiver comprising an inverter means for inverting.