KR950003901A - 액정구동방법과 액정표시장치 - Google Patents

액정구동방법과 액정표시장치 Download PDF

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Publication number
KR950003901A
KR950003901A KR1019940018425A KR19940018425A KR950003901A KR 950003901 A KR950003901 A KR 950003901A KR 1019940018425 A KR1019940018425 A KR 1019940018425A KR 19940018425 A KR19940018425 A KR 19940018425A KR 950003901 A KR950003901 A KR 950003901A
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South Korea
Prior art keywords
voltage
gradation
liquid crystal
crystal display
gradation voltages
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KR1019940018425A
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English (en)
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KR100343513B1 (ko
Inventor
타쓰오 카메이
켕이치 이와모토
요시오 오오와키
중이치 오오와다
Original Assignee
카나이 쪼또무
가부시기가이샤 히다찌세이사구쇼
나시모토 류조
히다찌디바이스엔지니어링 가부시기가이샤
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Publication of KR950003901A publication Critical patent/KR950003901A/ko
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Publication of KR100343513B1 publication Critical patent/KR100343513B1/ko

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated 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
    • 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
    • G09G3/3648—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
    • G09G3/34—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
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • 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
    • G09G2320/0204—Compensation of DC component across the pixels in flat panels
    • 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)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Nonlinear Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

본 발명은, 특히 박막트랜지스터 액정표시패널에 의해 다계조표시를 행하는 것에 이용해서 유효한 액정구동방법과 액정표시장치에 관한 것으로서, 다계조화를 도모하면서 잔상현상을 방지한 액정구동방법과 액정표시장치를 제공하는 것을 목적으로 하며, 그 구성에 있어서, 저항분압회로에 의해 정쪽 및 부쪽의 복수로 이루어진 계조전압을 형성하는 동시에, 신호진폭이 작아짐에 따라서 정쪽의 계조전압과 부쪽의 계조전압과의 평균치가, 공통전압에 대해서 증대하도록 상기 각 계조전압을 형성해서 TFT 액정표시패널을 구동하는 것을 특징으로 한 것이며, 이로서, 공통전극의 전압에 대해서, 각 계조전압의 정전압과 부전압을 비대칭으로해서 평균치를 최적으로 설정할 수 있으므로, 다계조화를 도모하면서 잔상현상을 방지할 수 있는 효과가 있다.
(제 1 도)

Description

액정구동방법과 액정표시장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제 1 도는 본 발명에 관한 액정표시장치의 일실시예를 설명하시 위한 개략 구성도. 제 2 도는 본 발명에 관한 액정구동방법 및 액정표시장치에 있어서의 각 전압을 설명하기 위한 파형도. 제 3 도는 계조접압과 최적코먼전압과의 관계를 설명하기 위한 특성도. 제 4 도는 종래의 다계조 구동신호의 일예를 설명하기 위한 파형도. 제 5 도는 본 발명에 관한 액정표시장치의 다른실시예를 설명하기 위한 개략구성도. 제 6 도는 본 발명에 관한 액정구동방법의 다른실시예를 있어서의 각부의 전압관계를 설명하기 위한 도면. 제 7 도는 본 발명에 관한 액정구동방법의 계조전압과 최적코먼전압과의 관계를 설명하기 위한 도면.

Claims (3)

  1. 저항분압회로에 의해 정쪽 및 부쪽의 복수로 이루어진 계조전압을 형성하는 동시에, 신호진폭이 작아짐에 따라서 정쪽의 계조전압과 부쪽의 계조전압과의 평균치가 공룡전압에 대해서 중대하도록 상기 각 계조전압을 형성하고, 표시신호에 대응해서 상기 각 계조전압을 TFT 액정표시패널에 공급하는 것을 특징으로 하는 액정구동방법.
  2. 복수로 이루어지는 계조전압의 신호진폭이 작아짐에 따라서 정쪽의 계조전압과 부쪽의 계조전압과의 평균치가, 공통전압에 대해서 증대하도록 저항비가 설정되어서 각 계조전압을 설정하는 저항분압회로와, 상기 계조전압을 출력하는 버퍼회로와, 표시신호에 따른 계조전압을 TFT액정표시패널에 공급하는 액정드라이버를 구비하여 이루어지는 것을 특징으로 하는 액정표시장치.
  3. 제 2 항에 있어서, 상기 저항분압회로의 양단부에는, 최대진폭전압과 기준전압과의 가산전압과 감산전압이 교류화신호에 의해 교호로 공급되는 동시에, 2개의 중점(中點)을 설정해서 조정가능하게된 중점전압이 교류화 극성에 따라 공급되는 것을 특징으로 하는 액정표시장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019940018425A 1993-07-29 1994-07-28 액정구동방법과액정표시장치 KR100343513B1 (ko)

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JP20726893 1993-07-29
JP93-207268 1993-07-29

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KR950003901A true KR950003901A (ko) 1995-02-17
KR100343513B1 KR100343513B1 (ko) 2003-05-27

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Publication number Priority date Publication date Assignee Title
KR100840672B1 (ko) * 2001-12-29 2008-06-24 엘지디스플레이 주식회사 액정표시장치의 감마 기준 전압 셋팅 장치 및 이를 이용한셋팅 방법
KR100848092B1 (ko) * 2002-03-06 2008-07-24 삼성전자주식회사 액정 표시 장치 및 그의 구동 방법

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KR101389252B1 (ko) 2008-05-23 2014-04-25 엘지디스플레이 주식회사 액정표시장치와 그 구동방법
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KR100848092B1 (ko) * 2002-03-06 2008-07-24 삼성전자주식회사 액정 표시 장치 및 그의 구동 방법

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US5640174A (en) 1997-06-17

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