FR2404271A1 - Dispositif de visualisation comportant une couche mince de cristal liquide accolee a une lame photoconductrice - Google Patents

Dispositif de visualisation comportant une couche mince de cristal liquide accolee a une lame photoconductrice

Info

Publication number
FR2404271A1
FR2404271A1 FR7728738A FR7728738A FR2404271A1 FR 2404271 A1 FR2404271 A1 FR 2404271A1 FR 7728738 A FR7728738 A FR 7728738A FR 7728738 A FR7728738 A FR 7728738A FR 2404271 A1 FR2404271 A1 FR 2404271A1
Authority
FR
France
Prior art keywords
liquid crystal
photoconductive
thin layer
accoled
blade
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.)
Granted
Application number
FR7728738A
Other languages
English (en)
Other versions
FR2404271B1 (fr
Inventor
Jean-Pierre Huignard
Serge Le Berre
Christian Mayeux
Francois Micheron
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
Thomson CSF 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 Thomson CSF SA filed Critical Thomson CSF SA
Priority to FR7728738A priority Critical patent/FR2404271A1/fr
Priority to GB7837892A priority patent/GB2005857B/en
Priority to JP11606478A priority patent/JPS5488795A/ja
Priority to DE19782841341 priority patent/DE2841341A1/de
Publication of FR2404271A1 publication Critical patent/FR2404271A1/fr
Priority to US06/231,117 priority patent/US4368386A/en
Application granted granted Critical
Publication of FR2404271B1 publication Critical patent/FR2404271B1/fr
Granted legal-status Critical Current

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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/135—Liquid crystal cells structurally associated with a photoconducting or a ferro-electric layer, the properties of which can be optically or electrically varied

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Radiography Using Non-Light Waves (AREA)
  • Apparatus For Radiation Diagnosis (AREA)

Abstract

L'invention se rapporte aux dispositifs de visualisation utilisant les cristaux liquides. Le dispositif selon l'invention comporte une couche mince de cristal liquide nématique, ou d'un mélange nématique-cholestérique insérée entre deux lames, dont l'une est une lame photoconductrice, à base d'oxyde de bismuth par exemple. Deux électrodes disposées l'une sur la face externe de la lame photoconductrice et l'autre sur la face interne de la seconde lame, permettent de soumettre l'ensemble photoconducteur-couche mince de cristal liquide à une tension de commande. Un rayonnement d'inscription, qui peut être un rayonnement ionisant en faisant varier spatialement la résistance de la lame photoconductrice, modifie localement la tension appliquée au cristal liquide et provoque une modification des propriétés optiques de ce dernier. L'invention est applicable notamment à la radioscopie et à la projection d'images sur grand écran.
FR7728738A 1977-09-23 1977-09-23 Dispositif de visualisation comportant une couche mince de cristal liquide accolee a une lame photoconductrice Granted FR2404271A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
FR7728738A FR2404271A1 (fr) 1977-09-23 1977-09-23 Dispositif de visualisation comportant une couche mince de cristal liquide accolee a une lame photoconductrice
GB7837892A GB2005857B (en) 1977-09-23 1978-09-22 Liquid-crystal image converter device
JP11606478A JPS5488795A (en) 1977-09-23 1978-09-22 Image converter
DE19782841341 DE2841341A1 (de) 1977-09-23 1978-09-22 Bildwandleranordnung
US06/231,117 US4368386A (en) 1977-09-23 1981-02-03 Liquid-crystal image converter device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7728738A FR2404271A1 (fr) 1977-09-23 1977-09-23 Dispositif de visualisation comportant une couche mince de cristal liquide accolee a une lame photoconductrice

Publications (2)

Publication Number Publication Date
FR2404271A1 true FR2404271A1 (fr) 1979-04-20
FR2404271B1 FR2404271B1 (fr) 1982-01-08

Family

ID=9195721

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7728738A Granted FR2404271A1 (fr) 1977-09-23 1977-09-23 Dispositif de visualisation comportant une couche mince de cristal liquide accolee a une lame photoconductrice

Country Status (5)

Country Link
US (1) US4368386A (fr)
JP (1) JPS5488795A (fr)
DE (1) DE2841341A1 (fr)
FR (1) FR2404271A1 (fr)
GB (1) GB2005857B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2503880A1 (fr) * 1981-04-10 1982-10-15 Thomson Csf Valve optique a cristal liquide commandee par effet photoconducteur

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4538884A (en) * 1981-07-10 1985-09-03 Canon Kabushiki Kaisha Electro-optical device and method of operating same
US4579421A (en) * 1983-10-05 1986-04-01 The United States Of America As Represented By The Director Of The National Security Agency Optical adaptive filter
US5196954A (en) * 1985-08-08 1993-03-23 Semiconductor Energy Laboratory Co., Ltd. Liquid crystal display
FR2633405A2 (fr) * 1986-01-04 1989-12-29 Cornuejols Georges Dispositif de traitement d'images et d'amelioration de la dynamique d'un capteur par addition de lumiere
FR2595145B1 (fr) * 1986-02-28 1989-03-31 Thomson Csf Systeme de visualisation a memoire
JPS62217782A (ja) * 1986-03-19 1987-09-25 Kawasaki Heavy Ind Ltd 画像投影装置
JPS63116122A (ja) * 1986-11-04 1988-05-20 Toyota Motor Corp 液晶素子
US4941735A (en) * 1989-03-02 1990-07-17 University Of Colorado Foundation, Inc. Optically addressable spatial light modulator
EP0394674B1 (fr) * 1989-03-23 1996-05-08 Victor Company Of Japan, Limited Elément de conversion de lumière et dispositif d'image
FR2711878B1 (fr) * 1993-10-29 1995-12-15 Thomson Csf Dispositif de visualisation couleurs et procédé de réalisation.
FR2727215B1 (fr) * 1994-11-18 1996-12-20 Thomson Csf Dispositif de veille panoramique infrarouge statique a detecteurs matriciels multiples
FR2750487B1 (fr) * 1996-06-28 2005-10-21 Thomson Csf Revetement pour la protection personnelle d'un fantassin
FR2755516B1 (fr) 1996-11-05 1999-01-22 Thomson Csf Dispositif compact d'illumination
US5847499A (en) * 1997-01-31 1998-12-08 Sunnybrook Hospital Apparatus for generating multiple X-ray images of an object from a single X-ray exposure
FR2819061B1 (fr) * 2000-12-28 2003-04-11 Thomson Csf Dispositif de controle de polarisation dans une liaison optique
US20050082624A1 (en) * 2003-10-20 2005-04-21 Evgeni Gousev Germanate gate dielectrics for semiconductor devices
JP2005285937A (ja) * 2004-03-29 2005-10-13 Fuji Photo Film Co Ltd 放射線撮像パネルを構成する光導電層および放射線撮像パネル
DE102005021298A1 (de) * 2005-05-09 2006-11-16 Rohde & Schwarz Gmbh & Co. Kg Optoelektronisch gesteuerter Schalter oder Modulator und Abschwächer
CN101283606B (zh) * 2005-10-05 2010-05-19 皇家飞利浦电子股份有限公司 可配置的多视点显示设备
CA2641779C (fr) * 2006-02-10 2014-08-05 Sunnybrook Health Sciences Centre Systemes numeriques d'imagerie radiographique aux rayons x a base de valves optiques
PL224639B1 (pl) 2014-06-02 2017-01-31 Wrocławskie Centrum Badań Eit + Spółka Z Ograniczoną Kaskadowy konwerter promieniowania jonizującego oraz urządzenie do diagnostyki obrazowej w czasie rzeczywistym
CN109557576A (zh) * 2018-10-24 2019-04-02 中山大学 一种基于液晶材料的新型辐射探测器

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2023249A1 (fr) * 1968-11-14 1970-08-07 Rca Corp
FR2296902A1 (fr) * 1975-01-06 1976-07-30 Hughes Aircraft Co Dispositif d'affichage a valve de lumiere a effet de champ et a cristaux liquides

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3607388A (en) * 1967-03-18 1971-09-21 Tokyo Shibaura Electric Co Method of preparing photoconductive layers on substrates
US3803408A (en) * 1969-06-11 1974-04-09 Thomson Csf Image converter
US3592527A (en) * 1969-11-12 1971-07-13 Gary H Conners Image display device
US4015984A (en) * 1973-05-17 1977-04-05 Kabushiki Kaisha Ricoh Inorganic photoconductor in glass binds with glass overcoat layer
US4068926A (en) * 1974-11-13 1978-01-17 Japan Suncrux Co., Ltd. Liquid crystal display device for displaying colored patterns
US4206979A (en) * 1977-03-28 1980-06-10 Grumman Aerospace Corporation Electro-optic modulator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2023249A1 (fr) * 1968-11-14 1970-08-07 Rca Corp
FR2296902A1 (fr) * 1975-01-06 1976-07-30 Hughes Aircraft Co Dispositif d'affichage a valve de lumiere a effet de champ et a cristaux liquides

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
EXBK/76 *
NV2219/74 *
NV700/69 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2503880A1 (fr) * 1981-04-10 1982-10-15 Thomson Csf Valve optique a cristal liquide commandee par effet photoconducteur
US4483592A (en) * 1981-04-10 1984-11-20 Thomson-Csf Liquid crystal optical valve controlled by photoconducting effect

Also Published As

Publication number Publication date
GB2005857A (en) 1979-04-25
GB2005857B (en) 1982-03-03
DE2841341A1 (de) 1979-04-05
US4368386A (en) 1983-01-11
FR2404271B1 (fr) 1982-01-08
JPS5488795A (en) 1979-07-14

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Legal Events

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