KR940024650A - 액티브 매트릭스형 액정 표시 장치 - Google Patents

액티브 매트릭스형 액정 표시 장치 Download PDF

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KR940024650A
KR940024650A KR1019940007465A KR19940007465A KR940024650A KR 940024650 A KR940024650 A KR 940024650A KR 1019940007465 A KR1019940007465 A KR 1019940007465A KR 19940007465 A KR19940007465 A KR 19940007465A KR 940024650 A KR940024650 A KR 940024650A
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circuit
signal
liquid crystal
active matrix
crystal display
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스스무 오히
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세끼모또 타다히로
닛본덴기 가부시끼가이샤
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control 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
    • G09G3/34—Control 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
    • G09G3/36—Control 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
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G09G3/3659—Control of matrices with row and column drivers using an active matrix the addressing of the pixel involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependant on signal of two data electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control 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
    • G09G3/34—Control 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
    • G09G3/36—Control 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
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control 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
    • G09G3/2003—Display of colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0286—Details of a shift registers arranged for use in a driving circuit
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0289—Details of voltage level shifters arranged for use in a driving circuit
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0294—Details of sampling or holding circuits arranged for use in a driver for data electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0297—Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control 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
    • G09G3/2007—Display of intermediate tones
    • G09G3/2011—Display of intermediate tones by amplitude modulation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control 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
    • G09G3/34—Control 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
    • G09G3/36—Control 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
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3614—Control of polarity reversal in general

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal (AREA)

Abstract

액티브 매트릭스형 액정 표시 장치(ALCD)에 있어서 아날로그 RGB 신호에 대한 신호 처리에 대응하고, 저소비 전력화와, 콤팩트화 저가격화를 실현하는 것에 있다.
ALCD는 화소 전극(13)으로 이루어진 LCD 패널(9)와, 이 LCD 패널(9)를 구동하는 수직 드라이버 회로(10) 및 상하 수평 드라이버 회로(11,12)를 구비하고 있다. 이 ALCD의 제어에 있어서는, RGB 비디오 신호를 입력하여 레벨 시프트 및 증폭을 행하여 샘플 홀드하는 샘플 홀드 회로(1)과, 이 샘플 홀드 회로(1)의 출력 신호를 √변환하는 √변환 회로(2)와, 이 √변환 회로(2)의 출력 신호에 의해 어떤 일정 전압에 대해 반전시킨 신호와 비반전 신호를 작성하는 데이타 반전 회로(3)과, 이들 각 회로를 제어하는 콘트롤러(4)를 갖는다. 게다가, 데이타 반전 회로(3)에서 LCD 패널(9)의 상하 수평 드라이버 회로(11,12)에 역상 또는 동상의 신호를 공급하여 화소 전극(13)을 구동한다.

Description

액티브 매트릭스형 액정 표시 장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 한 실시예를 도시한 ALCD의 블럭도.

Claims (9)

  1. 화소 전극으로 이루어진 액정 패널과, 상기 액정 패널을 구동하는 수직 드라이버 회로 및 상하 수평 드라이버 회로를 구비한 액티브 매트릭스형 액정 표시 장치에 있어서, RGB 비디오 신호를 입력하여 레벨 시프트 및 증폭을 행하여 샘플 홀드하는 샘플 홀드 회로와, 상기 샘플 홀드 회로의 출력 신호를 √변환하는 √변환 회로와, 상기 √변환 회로의 출력 신호에 의해 어떤 일정 전압에 대해 반전시킨 신호와 비반전 신호를 작성하는 데이타 반전 회로와, 상기 각 회로를 제어하는 콘트롤러를 갖고 있고, 상기 데이타 반전 회로에서 상기 액정 패널의 상기 상하 수평 드라이버 회로에서 역상의 신호를 공급하는 것을 특징으로 하는 액티브 매트릭스형 액정 표시 장치.
  2. 제1항에 있어서, 상기 반전시킨 신호와 비반전 신호를 상기 콘트롤러의 제어에 의해 상기 데이타 반전 회로에서 1수평 주사 기간에 역전시키는 것을 특징으로 하는 액티브 매트릭스형 액정 표시 장치.
  3. 제1항에 있어서, 상기 반전시킨 신호와 상기 비반전 신호를 상기 콘트롤러의 제어에 의해 상기 데이타 반전 회로에서 1수직 주사 기간에 역전시키는 것을 특징으로 하는 액티브 매트릭스형 액정 표시 장치.
  4. 제1항에 있어서, 상기 샘플 홀드 회로는, 상기 RGB 비디오 신호의 레벨 시프트 및 증폭을 행하는 입력 버퍼와 상기 증폭된 비디오 신호를 샘플 홀드하는 샘플 홀드부와, 외부로부터의 제1의 신호를 트리거로서 상기 샘플 홀드부의 샘플링 타이밍을 결정하는 신호를 생성하는 시프트 레지스터와, 상기 샘플 홀드된 신호를 외부에서의 제2신호로 선택하는 셀렉터로 이루어진 것을 특징으로 하는 액티브 매트릭스형 액정 표시 장치.
  5. 제1항에 있어서, 상기 샘플 홀드 회로와 상기 √변환 회로는 동일한 반도체 기판에 집적되는 것을 특징으로 하는 액티브 매트릭스형 액정 표시 장치.
  6. 화소 전극으로 이루어진 액정 패널과, 상기 액정 패널을 구동하는 수직 드라이버 회로 및 상하 수평 드라이버 회로를 구비한 액티브 매트릭스형 액정 표시 장치에 있어서, RGB 비디오 신호를 입력하여 레벨 시프트 및 증폭을 행하는 샘플 홀드하는 샘플 홀드 회로와, 상기 샘플 홀드 회로의 출력 신호를 √변환하는 √변환 회로와, 상기 √변환 회로의 출력 신호에 의해 어떤 일정 전압에 대하여 동상의 반전 신호 또는 동상의 비반전 신호를 작성하는 데이타 반전 회로와, 상기 각 회로를 제어하는 콘트롤러를 갖고 있고, 상기 데이타 반전 회로에서 상기 액정 패널의 상기 상하 수평 드라이버 회로에 동상의 신호를 공급하는 것을 특징으로 하는 액티브 매트릭스형 액정 표시 장치.
  7. 제6항에 있어서, 상기 동상의 신호를 상기 콘트롤러의 제어에 의해 상기 데이타 반전 회로에서 1수평 주사 기간에 역전시키는 것을 특징으로 하는 액티브 매트릭스형 액정 표시 장치.
  8. 제6항에 있어서, 상기 동상의 신호를 상기 콘트롤러의 제어에 의해 상기 데이타 반전 회로에서 1수직 주사 기간에 역전시키는 것을 특징으로 하는 액티브 매트릭스형 액정 표시 장치.
  9. 제6항에 있어서, 상기 샘플 홀드 회로, 상기 √변환 회로 및 상기 데이타 상전 데이타 반전 회로는 동일한 반도체 기판에 집적되는 것을 특징으로 하는 액티브 매트릭스형 액정 표시 장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019940007465A 1993-04-09 1994-04-09 액티브 매트릭스형 액정 표시 장치 KR970006863B1 (ko)

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JP5083187A JP2994169B2 (ja) 1993-04-09 1993-04-09 アクティブマトリックス型液晶表示装置
JP93-083187 1993-04-09

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KR970006863B1 KR970006863B1 (ko) 1997-04-30

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KR970006863B1 (ko) 1997-04-30
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