KR940015587A - Bright and contrast automatic control circuit of liquid crystal display - Google Patents

Bright and contrast automatic control circuit of liquid crystal display Download PDF

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Publication number
KR940015587A
KR940015587A KR1019920025800A KR920025800A KR940015587A KR 940015587 A KR940015587 A KR 940015587A KR 1019920025800 A KR1019920025800 A KR 1019920025800A KR 920025800 A KR920025800 A KR 920025800A KR 940015587 A KR940015587 A KR 940015587A
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KR
South Korea
Prior art keywords
signal
bright
contrast
output
control signal
Prior art date
Application number
KR1019920025800A
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Korean (ko)
Inventor
김홍주
Original Assignee
이헌조
주식회사 금성사
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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Publication date
Application filed by 이헌조, 주식회사 금성사 filed Critical 이헌조
Priority to KR1019920025800A priority Critical patent/KR940015587A/en
Publication of KR940015587A publication Critical patent/KR940015587A/en

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  • Liquid Crystal Display Device Control (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

본 발명은 외부 조도를 감지하는 광센서의 전기적 신호에 따라 브라이트 및 콘트라스트가 적정상태로 자동조절 되도록 함으로써, 사용자의 불편을 해소하기 위한 것으로, 외부 조도에 따라 전기적 신호를 출력하는 광센서부와, 상기 광센서부의 출력에 연결되어 출력신호를 마이콤 입력에 적절한 신호로 변환하는 변환부와, 상기 변환부의 출력신호를 인가받아 브라이트 및 콘트라스트 제어신호를 출력하는 마이콤과, 상기 마이콤의 브라이트 및 콘트라스트 제어신호를 인가받아 브라이트 및 콘트라스트 조절신호를 출력하는 조절부로 구성됨을 특징으로 하는 액정표시기의 브라이트 및 콘트라스트 자동조절회로다.The present invention is to solve the user's discomfort by automatically adjusting the brightness and contrast to the appropriate state according to the electrical signal of the optical sensor for detecting the external illuminance, the optical sensor unit for outputting the electrical signal according to the external illuminance, A conversion unit connected to an output of the optical sensor unit and converting an output signal into a signal suitable for a microcomputer input, a microcomputer receiving a output signal of the conversion unit to output a bright and contrast control signal, and a bright and contrast control signal of the micom; Bright and contrast automatic control circuit of the liquid crystal display, characterized in that consisting of a control unit for outputting a bright and contrast control signal is applied.

Description

액정표시기의 브라이트 및 콘트라스트 자동조절회로Bright and contrast automatic control circuit of liquid crystal display

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

제2도는 본 발명 액정표시기의 브라이트 및 콘트라스트 자동조절회로를 나타낸 블록도.2 is a block diagram showing a bright and contrast automatic control circuit of the liquid crystal display of the present invention.

Claims (3)

외부 조도에 따라 전기적신호를 출력하는 광센서부와, 상기 광센서부의 출력에 연결되어 출력신호를 마이콤 입력에 적절한 신호로 변환하는 변환부와, 상기 변환부의 출력신호를 인가받아 브라이트 및 콘트라스트 제어신호를 출력하는 마이콤과, 상기 마이콤의 브라이트 및 콘트라스트 제어신호를 인가받아 브라이트 및 콘트라스트 조절신호를 출력하는 조절부로 구성됨을 특징으로 하는 액정표시기의 브라이트 및 콘트라스트 자동조절회로.An optical sensor unit for outputting an electrical signal according to external illuminance, a converter connected to an output of the optical sensor unit and converting an output signal into a signal suitable for a microcomputer input, and a bright and contrast control signal applied to an output signal of the converter unit And a control unit for outputting a bright and contrast control signal by receiving a micom and a bright and contrast control signal of the microcomputer. 제1항에 있어서, 상기 변환부는 상기 광센서부의 출력에 연결되어 전류신호를 전압신호로 변환하는 전류/전압변환기와, 상기 전류/전압변환기의 출력신호를 인가받아 디지탈신호로 변환하여 상기 마이콤에 출력하는 A/D 변환기로 이루어짐을 특징으로 하는 액정표시기의 브라이트 및 콘트라스트 자동조절회로.The electronic device of claim 1, wherein the converter is connected to an output of the optical sensor and converts a current signal into a voltage signal, and receives an output signal of the current / voltage converter to convert the digital signal into a digital signal. Bright and contrast automatic control circuit of the liquid crystal display, characterized in that the output A / D converter. 제1항에 있어서, 상기 조절부는 상기 마이콤의 브라이트 제어 신호를 인가 받는 제1 디지탈입력 볼륨회로와, 상기 디지탈입력 볼륨회로에 연결되며 브라이트 전원을 인가받아 브라이트 조절신호인 백라이트신호를 출력하는 인버터와, 콘트라스트 전원에 연결되며 상기 마이콤의 콘트라스트 제어신호에 따라 콘트라스트 조절신호를 출력하는 제2 디지탈입력 볼륨회로로 이루어짐을 특징으로 하는 액정표시기의 브라이트 및 콘트라스트 자동조절회로.2. The display device of claim 1, wherein the control unit comprises: a first digital input volume circuit receiving the bright control signal of the microcomputer, an inverter connected to the digital input volume circuit, and receiving a bright power and outputting a backlight signal as a bright control signal; And a second digital input volume circuit connected to a contrast power source and outputting a contrast control signal according to the contrast control signal of the microcomputer. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920025800A 1992-12-28 1992-12-28 Bright and contrast automatic control circuit of liquid crystal display KR940015587A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920025800A KR940015587A (en) 1992-12-28 1992-12-28 Bright and contrast automatic control circuit of liquid crystal display

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920025800A KR940015587A (en) 1992-12-28 1992-12-28 Bright and contrast automatic control circuit of liquid crystal display

Publications (1)

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KR940015587A true KR940015587A (en) 1994-07-21

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KR1019920025800A KR940015587A (en) 1992-12-28 1992-12-28 Bright and contrast automatic control circuit of liquid crystal display

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990073764A (en) * 1998-03-03 1999-10-05 이종수 Monitor device with adjustable brightness
KR100440710B1 (en) * 1996-07-31 2004-10-14 삼성전자주식회사 Liquid crystal display device having an automatic contrast ratio controlling circuit, particularly concerned with automatically controlling a contrast ratio according to a light radiated outside at a random angle
KR100725684B1 (en) * 2001-06-22 2007-06-07 엘지전자 주식회사 Apparatus and method for controlling a back light in LCD
KR100811352B1 (en) * 2005-03-29 2008-03-10 샤프 가부시키가이샤 Area lighting device and liquid crystal display device having the same
US8031167B2 (en) 2007-02-01 2011-10-04 Samsung Electronics Co., Ltd. Method and apparatus for controlling backlight in display device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100440710B1 (en) * 1996-07-31 2004-10-14 삼성전자주식회사 Liquid crystal display device having an automatic contrast ratio controlling circuit, particularly concerned with automatically controlling a contrast ratio according to a light radiated outside at a random angle
KR19990073764A (en) * 1998-03-03 1999-10-05 이종수 Monitor device with adjustable brightness
KR100725684B1 (en) * 2001-06-22 2007-06-07 엘지전자 주식회사 Apparatus and method for controlling a back light in LCD
KR100811352B1 (en) * 2005-03-29 2008-03-10 샤프 가부시키가이샤 Area lighting device and liquid crystal display device having the same
US8031167B2 (en) 2007-02-01 2011-10-04 Samsung Electronics Co., Ltd. Method and apparatus for controlling backlight in display device

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