KR970031996A - An amplifier with dual contrast adjustment - Google Patents
An amplifier with dual contrast adjustment Download PDFInfo
- Publication number
- KR970031996A KR970031996A KR1019960012655A KR19960012655A KR970031996A KR 970031996 A KR970031996 A KR 970031996A KR 1019960012655 A KR1019960012655 A KR 1019960012655A KR 19960012655 A KR19960012655 A KR 19960012655A KR 970031996 A KR970031996 A KR 970031996A
- Authority
- KR
- South Korea
- Prior art keywords
- contrast
- sub
- video signal
- output
- gain
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/57—Control of contrast or brightness
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
- H03G3/007—Control dependent on the supply voltage
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/552—Indexing scheme relating to amplifiers the amplifier being made for video applications
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Receiver Circuits (AREA)
- Controls And Circuits For Display Device (AREA)
- Picture Signal Circuits (AREA)
Abstract
본 발명은 영상신호의 이득을 이중으로 조절하여 사용자가 원하는 콘트라스트의 영상을 재현할 수 있도록 하는 것이다.The present invention enables a user to reproduce an image of a desired contrast by double-adjusting the gain of a video signal.
본 발명은 영상신호를 입력받아 이를 처리하는 입력버퍼수단; 마이크로프로세서의 인터페이스를 통해 입력되는 소정의 레벨로 업/다운되는 직류성분의 콘트라스트 신호 및 서브 콘트라스트 신호를 전류변환하여 출력직류전압의 크기를 제어하는 메인 콘트라스트 및 서브 콘트라스트 제어수단; 상기 메인 콘트라스트 제어수단의 출력전압을 제어전압으로하여 입력버퍼수단을 통해 입력되는 영상신호의 이득을 일차적으로 조절하는 메인 콘트라스트 제어수단; 상기 서브 콘트라스트 제어수단의 출력전압을 제어전압으로하여 메인 큰트라스트수단을 통해 입력되는 일차적으로 이득이 조절된 영상신호의 이득을 이차적으로 조절하는 서브 콘트라스트 수단; 및 상기 서브 콘트라스트 수단으로부터 출력되는 이득이 조절된 영상신호를 최종적으로 출력하는 출력수단으로 구비된 것을 특징한다.The present invention relates to an input buffer for inputting and processing a video signal, A main contrast and sub-contrast control means for controlling a magnitude of an output DC voltage by current-converting a contrast signal and a sub-contrast signal of a DC component up / down to a predetermined level inputted through an interface of a microprocessor; Main contrast control means for primarily adjusting gain of a video signal inputted through an input buffer means with an output voltage of the main contrast control means as a control voltage; Sub-contrast means for regulating a gain of a primarily gain-controlled video signal inputted through a main large-trruster means with an output voltage of the sub-contrast control means as a control voltage; And output means for finally outputting a video signal whose gain is adjusted and output from the sub-contrast means.
따라서, 본 발명은 영상신호의 이득을 이중으로 조절함으로써 화면에 표시되는 영상을 더욱 선명하게 하기 위한 증폭단의 이득 조절범위가 확대되고, 이로 인하여 사용자의 요구에 맞는 화면을 제어할 수 있는 범위 또한 확대 되어질 수 있는 효과가 있다.Accordingly, in the present invention, the gain control range of the amplification stage for sharpening the image displayed on the screen is enlarged by double-controlling the gain of the video signal, There is an effect that can be done.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.
제 3 도는 본 발명에 의한 이중 콘트라스트 조절기능이 구비된 증폭기의 구성을 보인 블록도.FIG. 3 is a block diagram illustrating a configuration of an amplifier having a dual contrast adjustment function according to the present invention; FIG.
Claims (2)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR19950040130 | 1995-11-07 | ||
KR101995040130 | 1995-11-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR970031996A true KR970031996A (en) | 1997-06-26 |
KR100212133B1 KR100212133B1 (en) | 1999-08-02 |
Family
ID=26631384
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019960012655A KR100212133B1 (en) | 1995-11-07 | 1996-04-24 | Amplifier having double contrast control function |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR100212133B1 (en) |
-
1996
- 1996-04-24 KR KR1019960012655A patent/KR100212133B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR100212133B1 (en) | 1999-08-02 |
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