FR2984578B1 - Dispositif de visualisation securise a matrice a cristaux liquides nematiques twistes - Google Patents

Dispositif de visualisation securise a matrice a cristaux liquides nematiques twistes

Info

Publication number
FR2984578B1
FR2984578B1 FR1103889A FR1103889A FR2984578B1 FR 2984578 B1 FR2984578 B1 FR 2984578B1 FR 1103889 A FR1103889 A FR 1103889A FR 1103889 A FR1103889 A FR 1103889A FR 2984578 B1 FR2984578 B1 FR 2984578B1
Authority
FR
France
Prior art keywords
voltage
liquid crystal
transistors
pixels
rows
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.)
Active
Application number
FR1103889A
Other languages
English (en)
Other versions
FR2984578A1 (fr
Inventor
Laurent Canal
Dorian Santiago
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.)
Thales SA
Original Assignee
Thales SA
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 Thales SA filed Critical Thales SA
Priority to FR1103889A priority Critical patent/FR2984578B1/fr
Priority to CN201210525732.3A priority patent/CN103163673B/zh
Priority to US13/711,562 priority patent/US9709833B2/en
Publication of FR2984578A1 publication Critical patent/FR2984578A1/fr
Application granted granted Critical
Publication of FR2984578B1 publication Critical patent/FR2984578B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • G02F1/1306—Details
    • G02F1/1309—Repairing; Testing
    • 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
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G09G3/3666—Control of matrices with row and column drivers using an active matrix with the matrix divided into sections
    • 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
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0243—Details of the generation of driving signals
    • G09G2310/0245—Clearing or presetting the whole screen independently of waveforms, e.g. on power-on
    • 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
    • G09G2330/08—Fault-tolerant or redundant circuits, or circuits in which repair of defects is prepared
    • 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
    • G09G2330/10—Dealing with defective pixels
    • 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
    • G09G2330/12—Test circuits or failure detection circuits included in a display system, as permanent part thereof

Landscapes

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

Abstract

Le domaine général de l'invention est celui des dispositifs de visualisation comportant une matrice à cristaux liquides active de type nématique twisté. La matrice comprend un ensemble de pixels, un ensemble de lignes et de colonnes et un dispositif électronique de commande. Chaque pixel est commandé par un transistor. La tension appliquée à chaque ligne de commande est soit une tension d'ouverture VG_on suffisante pour ouvrir les transistors, soit une tension de fermeture VG_off suffisante pour fermer les transistors. La tension appliquée GMA sur chaque colonne est fonction de la transmission optique prédéterminée du pixel. Le dispositif de visualisation comporte des moyens de détection du bon fonctionnement du dispositif électronique de commande. En cas de détection d'un mauvais fonctionnement, le dispositif de visualisation comporte des moyens de coupure agencés de façon à forcer à zéro les tensions de fermeture VG_off des lignes et les tensions GMA des colonnes, de façon que la transmission de tous les pixels du premier ensemble soit minimale.
FR1103889A 2011-12-16 2011-12-16 Dispositif de visualisation securise a matrice a cristaux liquides nematiques twistes Active FR2984578B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR1103889A FR2984578B1 (fr) 2011-12-16 2011-12-16 Dispositif de visualisation securise a matrice a cristaux liquides nematiques twistes
CN201210525732.3A CN103163673B (zh) 2011-12-16 2012-12-07 具有扭曲向列液晶矩阵的安全显示设备
US13/711,562 US9709833B2 (en) 2011-12-16 2012-12-11 Secure display device with twisted nematic liquid crystal matrix

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1103889A FR2984578B1 (fr) 2011-12-16 2011-12-16 Dispositif de visualisation securise a matrice a cristaux liquides nematiques twistes

Publications (2)

Publication Number Publication Date
FR2984578A1 FR2984578A1 (fr) 2013-06-21
FR2984578B1 true FR2984578B1 (fr) 2013-12-20

Family

ID=45688574

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1103889A Active FR2984578B1 (fr) 2011-12-16 2011-12-16 Dispositif de visualisation securise a matrice a cristaux liquides nematiques twistes

Country Status (3)

Country Link
US (1) US9709833B2 (fr)
CN (1) CN103163673B (fr)
FR (1) FR2984578B1 (fr)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR0171938B1 (ko) * 1994-08-25 1999-03-20 사토 후미오 액정표시장치
FR2843823B1 (fr) * 2002-08-20 2006-04-21 Thales Sa Visualisations a cristaux liquides a commande fiabilisee
JP4565873B2 (ja) * 2004-03-29 2010-10-20 東北パイオニア株式会社 発光表示パネル
CN100444232C (zh) * 2005-05-28 2008-12-17 群康科技(深圳)有限公司 放电电路和采用该放电电路的液晶面板驱动电路
CN1937025B (zh) * 2005-09-23 2011-11-23 奇美电子股份有限公司 用于平面显示器的灰阶电压产生电路及其操作方法
CN100492111C (zh) * 2006-07-05 2009-05-27 群康科技(深圳)有限公司 放电电路及采用该放电电路的液晶显示装置
CN101174038B (zh) * 2006-11-01 2010-05-26 群康科技(深圳)有限公司 液晶显示器
FR2919949B1 (fr) * 2007-08-07 2010-09-17 Thales Sa Procede integre de detection d'un defaut d'image dans un ecran a cristal liquide
FR2934917B1 (fr) * 2008-08-08 2010-12-10 Thales Sa Dispositif de visualisation a ecran matriciel securise.
JP5370169B2 (ja) * 2010-01-15 2013-12-18 セイコーエプソン株式会社 映像処理回路、その処理方法、液晶表示装置および電子機器

Also Published As

Publication number Publication date
US9709833B2 (en) 2017-07-18
FR2984578A1 (fr) 2013-06-21
US20130155343A1 (en) 2013-06-20
CN103163673B (zh) 2018-02-13
CN103163673A (zh) 2013-06-19

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