JP2002014644A - 画像表示装置 - Google Patents

画像表示装置

Info

Publication number
JP2002014644A
JP2002014644A JP2000201442A JP2000201442A JP2002014644A JP 2002014644 A JP2002014644 A JP 2002014644A JP 2000201442 A JP2000201442 A JP 2000201442A JP 2000201442 A JP2000201442 A JP 2000201442A JP 2002014644 A JP2002014644 A JP 2002014644A
Authority
JP
Japan
Prior art keywords
converter
display
display device
unit
image display
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP2000201442A
Other languages
English (en)
Japanese (ja)
Other versions
JP2002014644A5 (enExample
Inventor
Hajime Akimoto
秋元　　肇
Yoshiaki Mikami
佳朗 三上
Toshio Miyazawa
敏夫 宮沢
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP2000201442A priority Critical patent/JP2002014644A/ja
Priority to TW090102618A priority patent/TW554306B/zh
Priority to KR1020010009634A priority patent/KR100786440B1/ko
Priority to US09/888,644 priority patent/US6856308B2/en
Publication of JP2002014644A publication Critical patent/JP2002014644A/ja
Publication of JP2002014644A5 publication Critical patent/JP2002014644A5/ja
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • G09G3/3685—Details of drivers for data electrodes
    • G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • 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
    • G09G2310/0202—Addressing of scan or signal lines
    • G09G2310/0205—Simultaneous scanning of several lines 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
    • 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
    • G09G2310/027—Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
    • 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
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0613—The adjustment depending on the type of the information to be displayed
    • G09G2320/062—Adjustment of illumination source parameters
    • 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
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/0633—Adjustment of display parameters for control of overall brightness by amplitude modulation of the brightness of the illumination source
    • 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
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/04—Changes in size, position or resolution of an image
    • G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
    • G09G2340/0428—Gradation resolution change
    • 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
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • 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
    • G09G3/3406—Control of illumination source
    • 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
    • G09G3/3674—Details of drivers for scan electrodes
    • G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Liquid Crystal (AREA)
  • Control Of El Displays (AREA)
JP2000201442A 2000-06-29 2000-06-29 画像表示装置 Pending JP2002014644A (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2000201442A JP2002014644A (ja) 2000-06-29 2000-06-29 画像表示装置
TW090102618A TW554306B (en) 2000-06-29 2001-02-07 Image display apparatus
KR1020010009634A KR100786440B1 (ko) 2000-06-29 2001-02-26 화상 표시 장치
US09/888,644 US6856308B2 (en) 2000-06-29 2001-06-26 Image display apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000201442A JP2002014644A (ja) 2000-06-29 2000-06-29 画像表示装置

Publications (2)

Publication Number Publication Date
JP2002014644A true JP2002014644A (ja) 2002-01-18
JP2002014644A5 JP2002014644A5 (enExample) 2006-04-27

Family

ID=18699134

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000201442A Pending JP2002014644A (ja) 2000-06-29 2000-06-29 画像表示装置

Country Status (4)

Country Link
US (1) US6856308B2 (enExample)
JP (1) JP2002014644A (enExample)
KR (1) KR100786440B1 (enExample)
TW (1) TW554306B (enExample)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002062838A (ja) * 2000-08-14 2002-02-28 Internatl Business Mach Corp <Ibm> 表示装置、コンピュータ装置、記憶媒体
JPWO2003091977A1 (ja) * 2002-04-26 2005-09-02 東芝松下ディスプレイテクノロジー株式会社 Ｅｌ表示パネルのドライバ回路
JP2006301166A (ja) * 2005-04-19 2006-11-02 Hitachi Displays Ltd 表示装置及びその駆動方法
JP2007047235A (ja) * 2005-08-08 2007-02-22 Hitachi Displays Ltd 画像表示装置
US7405720B2 (en) 2002-05-31 2008-07-29 Sony Corporation Analog buffer circuit, display device and portable terminal
JP2008233863A (ja) * 2007-02-23 2008-10-02 Seiko Epson Corp ソースドライバ、電気光学装置、投写型表示装置及び電子機器
JP2008233864A (ja) * 2007-02-23 2008-10-02 Seiko Epson Corp ソースドライバ、電気光学装置、投写型表示装置及び電子機器

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GB2366439A (en) * 2000-09-05 2002-03-06 Sharp Kk Driving arrangements for active matrix LCDs
US6927753B2 (en) * 2000-11-07 2005-08-09 Semiconductor Energy Laboratory Co., Ltd. Display device
CN1552050B (zh) 2001-09-07 2010-10-06 松下电器产业株式会社 El显示装置及其驱动方法
US11302253B2 (en) 2001-09-07 2022-04-12 Joled Inc. El display apparatus
US7015889B2 (en) * 2001-09-26 2006-03-21 Leadis Technology, Inc. Method and apparatus for reducing output variation by sharing analog circuit characteristics
US20030076282A1 (en) * 2001-10-19 2003-04-24 Semiconductor Energy Laboratory Co., Ltd. Display device and method for driving the same
JP3627710B2 (ja) * 2002-02-14 2005-03-09 セイコーエプソン株式会社 表示駆動回路、表示パネル、表示装置及び表示駆動方法
JP3820379B2 (ja) * 2002-03-13 2006-09-13 松下電器産業株式会社 液晶駆動装置
JP2004287165A (ja) * 2003-03-24 2004-10-14 Seiko Epson Corp 表示ドライバ、電気光学装置、電子機器及び表示駆動方法
US20050012735A1 (en) * 2003-07-17 2005-01-20 Low Yun Shon Method and apparatus for saving power through a look-up table
US7383480B2 (en) * 2004-07-22 2008-06-03 International Business Machines Corporation Scanning latches using selecting array
KR100827453B1 (ko) * 2004-12-29 2008-05-07 엘지디스플레이 주식회사 일렉트로 루미네센스 표시소자 및 그 구동방법
JP2006285118A (ja) * 2005-04-05 2006-10-19 Hitachi Displays Ltd 表示装置
CN101167118B (zh) 2005-04-26 2010-05-19 株式会社半导体能源研究所 发光装置及其驱动方法
US20060256718A1 (en) * 2005-05-16 2006-11-16 Hall David R Apparatus for Regulating Bandwidth
JP2007225873A (ja) * 2006-02-23 2007-09-06 Hitachi Displays Ltd 画像表示装置
FI20065387A0 (fi) 2006-06-07 2006-06-07 Valtion Teknillinen Maitotuote ja menetelmä sen valmistamiseksi
KR100776751B1 (ko) 2006-06-09 2007-11-19 주식회사 하이닉스반도체 전압 공급 장치 및 방법
JP4300491B2 (ja) * 2007-03-13 2009-07-22 ソニー株式会社 ディスプレイ装置
US8253654B2 (en) * 2007-03-16 2012-08-28 Motorola Mobility Llc Visual interface control based on viewing display area configuration
JP2008292654A (ja) * 2007-05-23 2008-12-04 Funai Electric Co Ltd 液晶モジュール
US8049747B2 (en) * 2007-12-14 2011-11-01 Motorola Mobility, Inc. Light diffuser for a stretchable display
JP2009238323A (ja) * 2008-03-27 2009-10-15 Fujitsu Microelectronics Ltd 半導体記憶装置、画像処理システムおよび画像処理方法
JP5141363B2 (ja) 2008-05-03 2013-02-13 ソニー株式会社 半導体デバイス、表示パネル及び電子機器
KR101057699B1 (ko) * 2008-05-15 2011-08-19 매그나칩 반도체 유한회사 원-타임 프로그래머블 기능을 갖는 메모리 장치, 이를구비한 표시패널 구동 칩 및 표시장치
JP5644295B2 (ja) * 2010-09-10 2014-12-24 セイコーエプソン株式会社 制御装置、表示装置及び表示装置の制御方法
KR20130033798A (ko) * 2011-09-27 2013-04-04 삼성디스플레이 주식회사 표시장치
KR102059501B1 (ko) 2012-08-22 2019-12-27 삼성디스플레이 주식회사 표시 장치 및 그 구동 방법
CN104077995B (zh) * 2014-06-30 2017-01-04 上海天马微电子有限公司 Tft阵列基板、显示面板及显示装置
JP6525547B2 (ja) * 2014-10-23 2019-06-05 イー インク コーポレイション 電気泳動表示装置、及び電子機器
JP2016161763A (ja) * 2015-03-02 2016-09-05 株式会社ジャパンディスプレイ 表示装置
CN104916250B (zh) * 2015-06-26 2018-03-06 合肥鑫晟光电科技有限公司 一种数据传输方法及装置、显示装置
CN104992686A (zh) * 2015-07-21 2015-10-21 京东方科技集团股份有限公司 一种显示面板及其驱动方法、驱动装置
CN106683609B (zh) * 2017-03-29 2020-02-18 京东方科技集团股份有限公司 一种像素驱动电路及其驱动方法、显示装置
CN107195278A (zh) * 2017-07-18 2017-09-22 京东方科技集团股份有限公司 一种显示面板的显示方法、显示面板及显示装置
CN108957814B (zh) * 2018-08-29 2021-08-13 南京京东方显示技术有限公司 一种液晶显示装置及电路补偿方法
JP2020076863A (ja) * 2018-11-07 2020-05-21 キヤノン株式会社 表示装置および電子機器

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TW554306B (en) 2003-09-21
US6856308B2 (en) 2005-02-15

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