KR970058025A

KR970058025A - Anti-Blanking Device According to Color Signal Level Detection of Television

Info

Publication number: KR970058025A
Application number: KR1019950057829A
Authority: KR
Inventors: 박주덕
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1995-12-27
Filing date: 1995-12-27
Publication date: 1997-07-31

Abstract

본 발명은 텔레비전에서 재생되는 소정 채널의 R.G.B색신호의 출력신호레벨이 소정의 기준레벨 이하로 검출되면 그 R.G.B색신호중에 가장 신호레벨이 큰 색신호를 보색으로 하여 영상화면을 반블랭킹 시킬 수 있도록 하는 텔레비전의 색신호레벨 검출에 따른 반블랭킹장치를 제공한다. 그에 따라 본 발명은 튜너(2)를 통해 선국된 소정 채널의영상신호가 영상IF부(4)를 통해 영상중간주파증폭되어 영상신호처리부(6)를 통해 색복조되어 R.G.B색신호로서 영상출력구동부(8)의 제1과 제2 및 제3출력구동소자(22,24,26)에 각각 공급됨에 의해, CRT(10)화면을 통한 색신호의 재생이 가능한 텔레비전에 있어서; 상기 영상출력구동부(8)에 의해 출력구동되는 R.G.B색신호의 출력신호레벨을 각각 검출하는 R.G.B레벨검출수단(12)과, 상기 R.G.B색신호의 출력신호레벨이 소정의 기준신호레벨 이하인 경우의 반블랭킹기능의 실행을 키설정하는 기능설정수단(14), 상기 기능설정수단(14)에 의한 반블랭킹기능의 실행하에서 상기 R.G.B레벨검출수단(12)에서 검출되는 R.G.B색신호의 출력신호레벨이 소정의 기준신호레벨 이하인 것으로 판정되면 해당 R.G.B색신호 중에서 가장 신호레벨이 큰 색신호를 보색으로 상기 CRT(10)화면에 대한 반블랭킹이 수행되도록 제어하는 제어수단(16) 및, 상기 제어수단(16)으로부터 제어데이터를 인가받아 상기 R.G.B색신호중에 가장 신호레벨이 큰 색신호에 해당하는 보색의 반블랭킹표시신호를 발생하는 표시신호처리수단(18,20)을 구비하여 구성된 것을 특징으로 한다.According to the present invention, when an output signal level of an RGB color signal of a predetermined channel reproduced on a television is detected to be lower than a predetermined reference level, the television screen can be half blanked by complementary to the color signal having the largest signal level among the RGB color signals. An anti-blanking device according to color signal level detection is provided. Accordingly, according to the present invention, the image signal of a predetermined channel tuned through the tuner 2 is amplified by the image intermediate frequency through the image IF unit 4, and color-demodulated through the image signal processing unit 6 to output the image output driver as an RGB color signal. A television capable of reproducing color signals through a CRT (10) screen by being supplied to the first, second and third output driver elements (22, 24, 26) of 8), respectively; RGB level detecting means 12 for detecting output signal levels of RGB color signals output and driven by said image output driver 8, and a semi-blanking function when the output signal level of said RGB color signals is equal to or less than a predetermined reference signal level. The output signal level of the RGB color signal detected by the RGB level detecting means 12 under the execution of the anti-blanking function performed by the function setting means 14 and the function setting means 14 for keying execution of the predetermined reference signal. Control means 16 for controlling anti-blanking on the screen of the CRT 10 in complementary color with the color signal having the largest signal level among the corresponding RGB color signals, and the control data from the control means 16. And display signal processing means (18, 20) for receiving the RGB color signal and generating a complementary half blanking display signal corresponding to the color signal having the largest signal level among the RGB color signals. It characterized.

Description

Anti-Blanking Device According to Color Signal Level Detection of Television

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

제1도는 본 발명에 따른 텔레비전의 색신호레벨 검출에 따른 반블랭킹장치를 나타낸 블럭구성도,1 is a block diagram showing an anti-blanking device in accordance with color signal level detection of a television according to the present invention;

제2도는 제1도에 도시된 영상출력구동부와 R.G.B래밸검출부의 상세한 회로구성을 나타낸 도면.FIG. 2 is a diagram showing a detailed circuit configuration of the image output driver and R.G.B ravel detector shown in FIG.

Claims

The image signal of the predetermined channel tuned through the tuner 2 is amplified by the image intermediate frequency through the image IF unit 4 and subjected to color demodulation through the image signal processing unit 6 to be the RGB color signal as a first color of the image output driver 8. And second and third output driver elements 22, 24 and 26, respectively, which are output driven by the image output driver 8 in a television capable of reproducing color signals through the CRT 10 screen. RGB level detection means (12) for respectively detecting the output signal level of the RGB color signal, and function setting means (14) for keying the execution of the anti-blanking function when the output signal level of the RGB color signal is equal to or less than a predetermined reference signal level. If the output signal level of the RGB color signal detected by the RGB level detecting means 12 is less than or equal to a predetermined reference signal level under the execution of the anti-blanking function by the function setting means 14, the signal level among the corresponding RGB color signals is the most. This big color A control means 16 for controlling anti-blanking of the screen of the CRT 10 in complementary colors and a control signal from the control means 1 to receive a color signal having the largest signal level among the RGB color signals. And a display signal processing means (18, 20) for generating a half blanking display signal of a corresponding complementary color.

2. The RGB output color detection means according to claim 1, wherein the RGB level detecting means (12) outputs an RGB output color signal induced at output terminals of the first, second and third output driver elements (22, 24, 26) of the image output driver (8). And a first comparator and a second comparator (28, 30, 32) for comparing with the reference signal (Vref), respectively.

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