KR970078515A

KR970078515A - Image level adjusting device by gain control of television

Info

Publication number: KR970078515A
Application number: KR1019960019083A
Authority: KR
Inventors: 김응조
Original assignee: 배순훈; 대우전자 주식회사
Priority date: 1996-05-31
Filing date: 1996-05-31
Publication date: 1997-12-12

Abstract

본 발명은 안테나에 수신되는 텔레비전신호의 신호강약에 대응하여 이득조정을 위해 발생되는 AGC전압을 검출하여 그 검출치에 상응하게 영상신호의 컬러레벨과 샤프니스레벨을 적응적으로 조절함에 화면상에 구현되는 영상의 질을 향상시키기 위한 텔레비전의 이득제어에 의한 영상레벨조정장치에 관한 것으로, 방송국에서무선전송되는 방송신호를 수신하기 위한 안테나(10)와, 방송채널의 선국을 위한 튜너(12), 그 선국된 방송채널의 방송신호에 포함된 영상신호를 재생처리하는 영상처리수단(14,16,18)을 갖춘 텔레비젼에 있어서, 상기 튜너(12)의 출력을 일정레벨로 유지하기 위해 이득조정에 따른 AGC전압을 발생하는 AGC수단(20)와, 상기 영상 신호처리수단(14,16,18)에서 영상신호처리되는 영상신호의 영상레벨조정을 위한 영상제어신호를 발생하는 영상신호제어수단(22) 및, 상기 영상신호제어수단(22)으로부터의 영상제어신호를 상기 AGC수단(20)에서 발생되는 AGC전압의 이득가변상태에 대응하여 가변조정하여 영상처리수단(14,16,18)에 공급하기 위한 조정신호 발생수단(24)로 구성된다.The present invention is implemented on the screen by detecting the AGC voltage generated for gain adjustment corresponding to the signal strength of the television signal received by the antenna and adaptively adjusting the color level and sharpness level of the video signal corresponding to the detected value. An apparatus for adjusting a video level by gain control of a television for improving the quality of a video being provided, comprising: an antenna (10) for receiving a broadcast signal wirelessly transmitted from a broadcast station, a tuner (12) for tuning a broadcast channel, In a television equipped with image processing means (14, 16, 18) for reproducing a video signal contained in a broadcast signal of the tuned broadcast channel, gain adjustment is performed to maintain the output of the tuner 12 at a constant level. AGC means 20 for generating the AGC voltage according to the above, and zero for generating an image control signal for adjusting the video level of the video signal processed by the video signal processing means (14, 16, 18). The image control means (14, 16) by varying the signal control means (22) and the image control signal from the image signal control means (22) in response to the gain variable state of the AGC voltage generated by the AGC means (20). And an adjustment signal generating means 24 for supplying the same to the 18.

Description

Image level adjusting device by gain control of television

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

제2도는 본 발명에 따른 텔레비전의 이득제어에 의한 영상레벨조정장치의 블럭구성을 나타낸 도면, 제3도(A)는 제2도에 도시된 컬러레벨조정부의 상세한 회로구성을 나타낸 도면, 제3도(B)는 제2도에 도시된 샤프니스레벨조정부의 상세한 회로구성을 나타낸 도면, 제4도는 본 발명의 바람직한 일실시예에 따른 텔레비젼의 이득제어에 의한 영상레벨조정장치의 동작을 설명하기 위한 플로우챠트이다.FIG. 2 is a block diagram showing the video level adjusting device according to the gain control of the television according to the present invention. FIG. 3A is a diagram showing the detailed circuit configuration of the color level adjusting section shown in FIG. (B) is a detailed circuit configuration of the sharpness level adjusting unit shown in FIG. 2, and FIG. 4 is a view for explaining the operation of the image level adjusting apparatus by gain control of a television according to a preferred embodiment of the present invention. It is a flowchart.

Claims

An antenna 10 for receiving a broadcast signal wirelessly transmitted from a broadcast station, a tuner 12 for tuning a broadcast channel, and image processing means 14 for reproducing and processing a video signal included in the broadcast signal of the tuned broadcast channel. 16 and 18, AGC means 20 for generating AGC voltage according to gain adjustment to maintain the output of the tuner 12 at a constant level, and the video signal processing means 14 and 16; The video signal control means 22 for generating a video control signal for adjusting the video level of the video signal processed by the video signal at step 18, and the video control signal from the video signal control means 22. Image by gain control of a television, characterized in that it comprises an adjustment signal generating means (24) for supplying to the image processing means (14, 16, 18) the variable adjustment in response to the gain variable state of the AGC voltage generated in Level adjuster.

The image control signal according to claim 1, wherein the image control signal that is variably adjusted by the adjustment signal generating means (24) is a color control signal and a sharpness level for adjusting the color level of the image signal of the image processing means (14, 16, 18). And a sharpness control signal for adjusting the video level.

The comparator according to claim 1 or 2, wherein the adjustment signal generating means (24) receives the color control signal from the first input terminal (+) and compares it with the AGC voltage supplied to the second input terminal (-). A sharpness composed of a color level adjusting section 24A composed of 24a and a comparator 24b receiving the sharpness control signal from a first input terminal + and comparing it with an AGC voltage supplied to a second input terminal-. An image level adjusting device according to gain control of a television, comprising a level adjusting unit (24A).

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