FR2420802A1 - Cellule d'affichage electro-optique passif - Google Patents

Cellule d'affichage electro-optique passif

Info

Publication number
FR2420802A1
FR2420802A1 FR7906940A FR7906940A FR2420802A1 FR 2420802 A1 FR2420802 A1 FR 2420802A1 FR 7906940 A FR7906940 A FR 7906940A FR 7906940 A FR7906940 A FR 7906940A FR 2420802 A1 FR2420802 A1 FR 2420802A1
Authority
FR
France
Prior art keywords
segments
mixture
layer
cell
optical 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.)
Granted
Application number
FR7906940A
Other languages
English (en)
Other versions
FR2420802B1 (fr
Inventor
Eric Saurer
Fereydoun Gharadjedaghi
Claude Laesser
Rene Viennet
Yves Ruedin
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.)
Ebauches SA
Original Assignee
Ebauches 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 Ebauches SA filed Critical Ebauches SA
Publication of FR2420802A1 publication Critical patent/FR2420802A1/fr
Application granted granted Critical
Publication of FR2420802B1 publication Critical patent/FR2420802B1/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
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133753—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
    • 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
    • G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/13731—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on a field-induced phase transition
    • G02F1/13737—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on a field-induced phase transition in liquid crystals doped with a pleochroic dye
    • 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
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133371—Cells with varying thickness of the liquid crystal layer
    • 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
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133742—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers for homeotropic alignment

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Mathematical Physics (AREA)
  • Liquid Crystal (AREA)

Abstract

Cellule d'affichage électro-optique passif constituée par une couche d'un mélange de cristal liquide nématique à anisotropie diélectrique positive, d'un composé optiquement actif et de molécules dichroïques. Les faces internes des plaques de la cellule sont recouvertes de couches d'alignement telles que, dans l'aire située en dehors des zones d'affichage (segments), la couche du mélange a une structure homéotrope dans toute son épaisseur. Au droit des segments la cellule est agencée de façon que la couche du mélange a une structure hélicoïdale de sorte que la lumière incidente est absorbée dans ces zones lorsque celles-ci ne sont pas activées, et que la couche du mélange s'oriente selon une structure homéotrope sous l'action d'un champ électrique. Ainsi, lorsque la cellule est au repos, tous ses segments sont visibles, l'affichage s'effectuant en << effaçant >> les segments qui ne doivent pas apparaître, seuls les segments non activés demeurant visibles en sombre sur fond clair.
FR7906940A 1978-03-22 1979-03-20 Cellule d'affichage electro-optique passif Granted FR2420802A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH313578A CH621200A5 (fr) 1978-03-22 1978-03-22

Publications (2)

Publication Number Publication Date
FR2420802A1 true FR2420802A1 (fr) 1979-10-19
FR2420802B1 FR2420802B1 (fr) 1984-04-06

Family

ID=4249369

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7906940A Granted FR2420802A1 (fr) 1978-03-22 1979-03-20 Cellule d'affichage electro-optique passif

Country Status (8)

Country Link
US (1) US4277144A (fr)
JP (1) JPS54143162A (fr)
AT (1) AT380576B (fr)
CH (1) CH621200A5 (fr)
DE (1) DE2853639B2 (fr)
FR (1) FR2420802A1 (fr)
GB (1) GB2020053B (fr)
NL (1) NL179685C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0795774A2 (fr) * 1996-03-11 1997-09-17 Canon Kabushiki Kaisha Dispositif à cristal liquide et son procédé de fabrication

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS564121A (en) * 1979-06-22 1981-01-17 Stanley Electric Co Ltd Liquid crystal display device
US4563059A (en) * 1983-01-10 1986-01-07 Clark Noel A Surface stabilized ferroelectric liquid crystal devices
USRE34950E (en) * 1980-01-08 1995-05-23 Clark Noel A Surface stabilized ferroelectric liquid crystal devices with means for aligning LC molecules at Ω(α) from normal to the means
US5083855A (en) * 1980-01-08 1992-01-28 Clark Noel A Surface stabilized ferroelectric liquid crystal devices
US4840463A (en) * 1987-08-19 1989-06-20 Clark Noel A Surface stabilized ferroelectric liquid crystal devices
US5227905A (en) * 1980-01-08 1993-07-13 Clark Noel A Surface stabilized ferroelectric liquid crystal devices
US4958916A (en) * 1980-01-08 1990-09-25 Clark Noel A Surface stabilized ferroelectric liquid crystal devices
US4813767A (en) * 1980-01-08 1989-03-21 Clark Noel A Surface stabilized ferroelectric liquid crystal devices
USRE34966E (en) * 1980-01-08 1995-06-13 Clark Noel A Surface stabilized ferroelectric liquid crystal devices with LC molecules aligned at angle Ω(α) from normal to substrates
JPS56122866U (fr) * 1980-02-20 1981-09-18
NL8200069A (nl) * 1982-01-11 1983-08-01 Philips Nv Weergeefinrichting met vloeibaar kristal.
JPS5979221A (ja) * 1982-10-29 1984-05-08 Canon Inc 電気光学装置
YU44866B (en) * 1983-09-09 1991-04-30 Inst Stefan Jozef Matrix lcd with an internal reflector and a measuring net
US4726659A (en) * 1986-02-24 1988-02-23 Rca Corporation Display device having different alignment layers
JPS62210421A (ja) * 1986-03-11 1987-09-16 Canon Inc 光学変調素子
US4813771A (en) * 1987-10-15 1989-03-21 Displaytech Incorporated Electro-optic switching devices using ferroelectric liquid crystals
JP2801102B2 (ja) * 1991-02-01 1998-09-21 富士通株式会社 液晶表示装置
US5631754A (en) * 1995-10-20 1997-05-20 Physical Optics Corporation Holographic high contrast viewing screen embedded in a liquid crystal display
JP2000162624A (ja) * 1998-11-26 2000-06-16 Sanyo Electric Co Ltd 反射型液晶表示装置
JP3636641B2 (ja) * 1999-08-20 2005-04-06 セイコーエプソン株式会社 電気光学装置
JP3852342B2 (ja) * 2002-01-28 2006-11-29 セイコーエプソン株式会社 反射板、反射板の製造方法、液晶装置、電子機器
FR2957429B1 (fr) * 2010-03-12 2012-08-17 Commissariat Energie Atomique Modulateur de phase a base de cristal liquide a structure helicoidale

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3833287A (en) * 1973-03-08 1974-09-03 Bell Telephone Labor Inc Guest-host liquid crystal device
FR2416519A1 (fr) * 1978-02-06 1979-08-31 Ebauches Sa Cellule d'affichage electro-optique passif
FR2417156A1 (fr) * 1978-02-13 1979-09-07 Siemens Ag Dispositif d'affichage a cristal liquide

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4997636A (fr) * 1973-01-18 1974-09-14
US4112157A (en) * 1973-06-18 1978-09-05 Siemens Aktiengesellschaft Method of producing a film which promotes homeotropic orientation of liquid crystals and a liquid crystal utilizing the film

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3833287A (en) * 1973-03-08 1974-09-03 Bell Telephone Labor Inc Guest-host liquid crystal device
FR2416519A1 (fr) * 1978-02-06 1979-08-31 Ebauches Sa Cellule d'affichage electro-optique passif
FR2417156A1 (fr) * 1978-02-13 1979-09-07 Siemens Ag Dispositif d'affichage a cristal liquide

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/74 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0795774A2 (fr) * 1996-03-11 1997-09-17 Canon Kabushiki Kaisha Dispositif à cristal liquide et son procédé de fabrication
EP0795774A3 (fr) * 1996-03-11 1998-03-25 Canon Kabushiki Kaisha Dispositif à cristal liquide et son procédé de fabrication
US6320639B1 (en) 1996-03-11 2001-11-20 Canon Kabushiki Kaisha Liquid crystal device and process for production thereof

Also Published As

Publication number Publication date
US4277144A (en) 1981-07-07
CH621200A5 (fr) 1981-01-15
GB2020053B (en) 1982-09-15
JPS54143162A (en) 1979-11-08
DE2853639C3 (fr) 1987-10-22
FR2420802B1 (fr) 1984-04-06
DE2853639B2 (de) 1981-01-29
DE2853639A1 (de) 1979-09-27
GB2020053A (en) 1979-11-07
NL179685B (nl) 1986-05-16
NL7902252A (nl) 1979-09-25
NL179685C (nl) 1986-10-16
AT380576B (de) 1986-06-10
ATA174679A (de) 1985-10-15

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Legal Events

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TP Transmission of property
ST Notification of lapse