KR960035398A - 액정 표시 장치 - Google Patents

액정 표시 장치 Download PDF

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Publication number
KR960035398A
KR960035398A KR1019960005488A KR19960005488A KR960035398A KR 960035398 A KR960035398 A KR 960035398A KR 1019960005488 A KR1019960005488 A KR 1019960005488A KR 19960005488 A KR19960005488 A KR 19960005488A KR 960035398 A KR960035398 A KR 960035398A
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KR
South Korea
Prior art keywords
liquid crystal
signal
counter electrode
reference value
crystal display
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KR1019960005488A
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English (en)
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KR0176295B1 (ko
Inventor
유지 사또
미나부 다나까
Original Assignee
쯔지 하루오
샤프 가부시끼가이샤
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Publication of KR960035398A publication Critical patent/KR960035398A/ko
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Publication of KR0176295B1 publication Critical patent/KR0176295B1/ko

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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3648Control of matrices with row and column drivers using an active matrix
    • G09G3/3655Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3648Control of matrices with row and column drivers using an active matrix
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0271Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007Display of intermediate tones
    • G09G3/2011Display of intermediate tones by amplitude modulation

Abstract

액정 장치는 감마 제어기로서 작용하는, 기준값 변동부와 레벨 변환기를 갖고 있는 비디오 인터페이스, 및 밝기 조정기로부터 전송된 제어 신호에 근거해서 대향 전극 신호의 피크 대 피크 진폭을 조정하는 귀환 증폭 회로를 갖고 있는 대향 전극 신호 발생 회로를 구비하고 있다. 기준값 변동부는 밝기 조정기로부터 전송된 제어 신호에 근거해서 대향 전극 신호 진폭의 변동분만큼 다각선 근사 특성의 기준값을 변동시킨다. 레벨 변환기는 가변 기준값에 근거해서 결정된 다각선 근사 특성에 따라서 영상 신호의 레벨을 변환하고 인가 전압에 대한 액정의 광 투과율 특성의 비직선상을 보정한다. 결과적으로, 올바른 제조를 표시할 수 있는 디스플레이 밝기 조정 기능을 갖고 있는 소형이고 얇고 가격기 싼 액정 표시 장치를 제공할 수 있다.

Description

액정 표시 장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명에 따른 한 실시예의 TFT-LCD의 신호 처리에 대한 주요부를 보여주는 블럭도, 제2도는 상기 TFT-LCD에 있어서 액정 패널 및 그의 구동부의 구성을 보여주는 설명도.

Claims (7)

  1. 표시 전극(display electrode); 액정층에 대하여 상기 표시 전극에 대향 배치된 대향 전극(counter electrode); 디스플레이 밝기를 설정하는 밝기 설정부(brightness setting section); 선정된 주파수로 극성이 반전되는 영상 신호를 발생하는 영상 신호 발생 수단(image signal generating means); 상기 영상 신호에 따른 신호 전압을 상기 표시 전극에 인가하는 신호 전압 인가 수단(signal voltage applying means); 및 상기 영상 신호의 극성 반전 주파수에 동기해서 극성이 반전되는 대향 전극 신호를 발생하고, 상기 발생된 대향 전극 신호를 상기 대향 전극에 공급하는 대향 전극 신호 발생 수단(counter electrode signal generating means)을 구비하되, 상기 대향 전극 신호 발생 수단은 상기 밝기 설정부를 통한 설정에 근거해서 상기 대향 전극 신호의 피크 대 피크 진폭을 조정하는 진폭 조정부(amplitude adjusting section)를 포함하며, 상기 영상 신호 발생 수단은 기준값에 근거해서 결정되는 보정 특성에 따라서 상기 영상 신호의 레벨을 변환하고 인가 전압에 대한 액정의 투과율의 비직선성을 보정하는 레벨 변환부(level conversion section), 및 상기 밝기 설정부를 통한 설정에 근거해서 조정되는 대향 전극 신호 진폭의 변동분만큼 보정 특성의 기준값을 변동시키는 기준값 변동부(reference value shifting section)를 포함하는 것을 특징으로 하는 액정 표시 장치.
  2. 제1항에 있어서, 상기 레벨 변환부는 적어도 두개의 변곡점을 갖고 있는 다각선 근사 특성에 따라서 영상 신호의 레벨을 변환하고, 상기 기준값 변동부는 대향 전극 신호 전폭의 변동분만큼 다각선 근사 특성의 기준값을 변화시킴으로써 대항 전극 신호 진폭의 변동에 관계없이 변곡점의 위치들을 고정시키는 것을 특징으로 하는 액정 표시 장치.
  3. 제1항에 있어서, 상기 진폭 조정부는 가변 저항을 갖고 있는 귀환 증폭 회로를 포함하며, 상기 밝기 설정부로부터 전송된 제어 신호에 근거해서 가변 저항의 설정값을 변화시킴으로써 대향 전극 신호의 피크 대 피크 진폭을 조정하는 것을 특징으로 하는 액정 표시 장치.
  4. 제1항에 있어서, 상기 신호 저압 인가 수단은 저내압 드라이버 IC(low withstand-voltage driver IC)인 것을 특징으로 하는 액정 표시 장치.
  5. 제4항에 있어서, 상기 신호 전압 인가 수단은 입력 영상 신호를 샘플링(sampling)하고 홀딩(holding)하는 샘플 홀드 회로(spmle & hold circuit)를 더 구비하는 것을 특징으로 하는 액정 표시 장치.
  6. 제1항에 있어서, 각각의 픽셀은 상기 표시 전극 각각으로의 신호 전압의 공급을 스위칭하는 스위칭 소자를 갖고 있는 것을 특징으로 하는 액정 표시 장치.
  7. 제6항에 있어서, 상기 스위칭 소자는 박막 트랜지스터(TFT)인 것을 특징으로 하는 액정 표시 장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019960005488A 1995-03-31 1996-03-02 액정 표시 장치 KR0176295B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP95-076776 1995-03-31
JP07677695A JP3199978B2 (ja) 1995-03-31 1995-03-31 液晶表示装置

Publications (2)

Publication Number Publication Date
KR960035398A true KR960035398A (ko) 1996-10-24
KR0176295B1 KR0176295B1 (ko) 1999-04-01

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Country Status (5)

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US (1) US5751267A (ko)
EP (1) EP0735520B1 (ko)
JP (1) JP3199978B2 (ko)
KR (1) KR0176295B1 (ko)
DE (1) DE69621074T2 (ko)

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KR100352717B1 (ko) * 1999-03-29 2002-09-16 샤프 가부시키가이샤 액정표시장치
KR100388673B1 (ko) * 2001-05-18 2003-06-25 삼성전자주식회사 디스플레이장치 및 그 제어방법
KR100571032B1 (ko) * 1998-01-09 2006-04-13 가부시키가이샤 히타치세이사쿠쇼 액정표시장치

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JP3813463B2 (ja) * 2000-07-24 2006-08-23 シャープ株式会社 液晶表示装置の駆動回路及びそれを用いた液晶表示装置並びにその液晶表示装置を用いた電子機器
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KR101175564B1 (ko) * 2006-06-29 2012-08-21 엘지디스플레이 주식회사 액정표시장치의 감마전압 공급 회로
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100571032B1 (ko) * 1998-01-09 2006-04-13 가부시키가이샤 히타치세이사쿠쇼 액정표시장치
KR100352717B1 (ko) * 1999-03-29 2002-09-16 샤프 가부시키가이샤 액정표시장치
KR100388673B1 (ko) * 2001-05-18 2003-06-25 삼성전자주식회사 디스플레이장치 및 그 제어방법

Also Published As

Publication number Publication date
DE69621074T2 (de) 2002-12-19
JP3199978B2 (ja) 2001-08-20
DE69621074D1 (de) 2002-06-13
EP0735520B1 (en) 2002-05-08
EP0735520A1 (en) 1996-10-02
JPH08272338A (ja) 1996-10-18
KR0176295B1 (ko) 1999-04-01
US5751267A (en) 1998-05-12

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