KR970057625A - Brightness Projection Method and Circuit of LCD Projection Television Receiver - Google Patents

Brightness Projection Method and Circuit of LCD Projection Television Receiver Download PDF

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Publication number
KR970057625A
KR970057625A KR1019950055744A KR19950055744A KR970057625A KR 970057625 A KR970057625 A KR 970057625A KR 1019950055744 A KR1019950055744 A KR 1019950055744A KR 19950055744 A KR19950055744 A KR 19950055744A KR 970057625 A KR970057625 A KR 970057625A
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KR
South Korea
Prior art keywords
signal
brightness
lcd
retrace
unit
Prior art date
Application number
KR1019950055744A
Other languages
Korean (ko)
Other versions
KR100206322B1 (en
Inventor
김익송
Original Assignee
김광호
삼성전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 김광호, 삼성전자 주식회사 filed Critical 김광호
Priority to KR1019950055744A priority Critical patent/KR100206322B1/en
Publication of KR970057625A publication Critical patent/KR970057625A/en
Application granted granted Critical
Publication of KR100206322B1 publication Critical patent/KR100206322B1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3179—Video signal processing therefor
    • H04N9/3182—Colour adjustment, e.g. white balance, shading or gamut
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/44—Colour synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/67—Circuits for processing colour signals for matrixing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/68—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits
    • H04N9/69—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits for modifying the colour signals by gamma correction

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Processing Of Color Television Signals (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

LCD를 이용하여 표시장치의 TV수상기의 밝기 조정방법에 있어서, 영상신호의 신호부분과 귀선부분을 적절하게 이용하여 귀선기간동안 밝기 전압을 영상신호에 중첩하도록 선택토록 하되, 상기 H-블랭킹기간(귀선기간)에 가해지는 밝기신호를 가변하여 마치 페데스탈 레벨이 변하도록 하여 후단에서 클램프처리시 기준 레벨로 사용하여 신호의 페테스탈 레벨이 변하도록 함In the method of adjusting the brightness of a TV receiver of a display device using an LCD, the signal portion and the retrace portion of the image signal are appropriately selected so that the brightness voltage is superimposed on the image signal during the retrace period, wherein the H-blanking period ( By changing the brightness signal applied during the retrace period, the pedestal level is changed so that the pedestal level of the signal is changed by using it as a reference level when clamping at the rear stage.

Description

액정프로젝션 텔레비전 수상기의 밝기 조정방법 및 회로Brightness Control Method and Circuit of LCD Projection Television Receiver

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

제1도는 본발명의 따른 회로도1 is a circuit diagram according to the present invention

제2도는 제1도의 동작 파형도2 is an operational waveform diagram of FIG.

Claims (3)

LCD를 이용하여 TV수상기의 밝기 조정방법에 있어서, 상기 TV수상기의 영상신호의 신호부분과 귀선부분을 이용하여 귀선기간동안 밝기 전압을 영상신호에 중첩되도록 선택토록 함을 특징으로 하는 방법.A method of adjusting the brightness of a television receiver using an LCD, characterized in that the brightness voltage is superimposed on the video signal during the retrace period by using the signal portion and the retrace portion of the image signal of the TV receiver. 제1항에 있어서, 상기 귀선부분에 가해지는 밝기신호 가변은 페데스탈 레벨의 변화에 따라 후단에서 클램프처리시 기준 레벨로 사용하여 신호의 페디스탈 레벨에 따라 변화되도록 함을 특징으로 하는 방법.The method of claim 1, wherein the change of the brightness signal applied to the retrace portion is used as a reference level during the clamping process at the rear end according to the change of the pedestal level so as to change according to the pedestal level of the signal. LCD를 이용하여 TV수상기의 밝기 조정회로에 있어서 상기 표시장치의입력영상의 Y신호와 C신호로부터 R,G,B원색신호를 만들어내는 색신호 복조 및 매트릭스부(100)와, 상기 색신호복조 및 매트릭스부(100)의 R,G,B원색신호와 밝기 제어신호(직류 가변전압)를 H-블링킹 제어신호에 의해 선택적으로 선택하는 선택부(200)와, 상기 H-블랭킹 기간이 보정된 신호를 입력으로 하여 H-클램프펄스신호에 의해 원하는 신호로 DC를 재생한 후 LCD특성에 맞는 신호를 생성하고 감마(gamma)보정 및 교류 구동을 행하는 LCD인터페이스부(300)와, LCD모듈로서 표시소자로서 타이밍 클럭신호에 영상신호를 적절하게 표시해주는 LCD모듈(400)과, 상기 색신호복조 및 매트릭스부(100)에서 발생되는 H-동기신호를 적당한 H-블랭킹 신호로 파형을 정형하여 주는 멀티바이브레이터(500)로 구성됨을 특징으로 하는 회로.A color signal demodulation and matrix unit 100 for generating R, G, and B primary color signals from Y and C signals of an input image of the display device in a brightness adjustment circuit of a TV receiver using an LCD; and the color signal demodulation and matrix A selection unit 200 for selectively selecting the R, G, and B primary color signals and the brightness control signal (DC variable voltage) of the unit 100 by the H-blinking control signal, and a signal whose H-blanking period is corrected. LCD interface unit 300 for generating a signal suitable for LCD characteristics, performing gamma correction, and AC drive after regenerating DC with a desired signal by using an H-clamp pulse signal. A multivibrator for shaping the waveform into an appropriate H-blanking signal for the LCD module 400 for properly displaying an image signal on a timing clock signal and an H-sync signal generated from the color signal demodulation and matrix unit 100 as 500) Circuit according to claim. ※참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is to be disclosed based on the initial application.
KR1019950055744A 1995-12-23 1995-12-23 Luminance control method and circuit for lcd projection tv KR100206322B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950055744A KR100206322B1 (en) 1995-12-23 1995-12-23 Luminance control method and circuit for lcd projection tv

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950055744A KR100206322B1 (en) 1995-12-23 1995-12-23 Luminance control method and circuit for lcd projection tv

Publications (2)

Publication Number Publication Date
KR970057625A true KR970057625A (en) 1997-07-31
KR100206322B1 KR100206322B1 (en) 1999-07-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950055744A KR100206322B1 (en) 1995-12-23 1995-12-23 Luminance control method and circuit for lcd projection tv

Country Status (1)

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KR (1) KR100206322B1 (en)

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KR100206322B1 (en) 1999-07-01

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