FR2279183A1 - Liquid crystal display for alphanumeric characters - with increased field angle and higher contrast involves polariser and analyser - Google Patents

Liquid crystal display for alphanumeric characters - with increased field angle and higher contrast involves polariser and analyser

Info

Publication number
FR2279183A1
FR2279183A1 FR7424701A FR7424701A FR2279183A1 FR 2279183 A1 FR2279183 A1 FR 2279183A1 FR 7424701 A FR7424701 A FR 7424701A FR 7424701 A FR7424701 A FR 7424701A FR 2279183 A1 FR2279183 A1 FR 2279183A1
Authority
FR
France
Prior art keywords
liquid crystal
polariser
analyser
crystal display
field angle
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
FR7424701A
Other languages
French (fr)
Other versions
FR2279183B1 (en
Inventor
Bruno Dargent
Jacques Robert
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
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 Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Priority to FR7424701A priority Critical patent/FR2279183A1/en
Priority to JP50086619A priority patent/JPS5133999A/ja
Priority to DE19752531806 priority patent/DE2531806A1/en
Publication of FR2279183A1 publication Critical patent/FR2279183A1/en
Application granted granted Critical
Publication of FR2279183B1 publication Critical patent/FR2279183B1/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
    • G02F1/137—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
    • G02F1/139—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 orientation effects in which the liquid crystal remains transparent
    • G02F1/1396—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 orientation effects in which the liquid crystal remains transparent the liquid crystal being selectively controlled between a twisted state and a non-twisted state, e.g. TN-LC cell
    • 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
    • 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
    • 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
    • G02F1/13712—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 the liquid crystal having negative dielectric anisotropy

Abstract

The display has a liquid crystal cell (32) comprising a liquid crystal film (34) between transparent walls (36, 40) provided with transparent electrode systems (38, 42). A potential difference can be applied to the electrodes to expose the liquid crystal to an exciting field, and the cell is part of a system comprising an analyser (44) and a polariser (46). When an exciting field is applied the liquid crystal exhibits negative dielectric anisotropy, and when there is no exciting field present the longitudinal axes of the liquid crystal molecules are oriented at right angles to the electrodes. This orientation is pref. effected by means of an interfacially active agent mixed with the liquid crystal.
FR7424701A 1974-07-16 1974-07-16 Liquid crystal display for alphanumeric characters - with increased field angle and higher contrast involves polariser and analyser Granted FR2279183A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR7424701A FR2279183A1 (en) 1974-07-16 1974-07-16 Liquid crystal display for alphanumeric characters - with increased field angle and higher contrast involves polariser and analyser
JP50086619A JPS5133999A (en) 1974-07-16 1975-07-15
DE19752531806 DE2531806A1 (en) 1974-07-16 1975-07-16 LIQUID CRYSTAL DISPLAY DEVICE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7424701A FR2279183A1 (en) 1974-07-16 1974-07-16 Liquid crystal display for alphanumeric characters - with increased field angle and higher contrast involves polariser and analyser

Publications (2)

Publication Number Publication Date
FR2279183A1 true FR2279183A1 (en) 1976-02-13
FR2279183B1 FR2279183B1 (en) 1977-03-18

Family

ID=9141330

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7424701A Granted FR2279183A1 (en) 1974-07-16 1974-07-16 Liquid crystal display for alphanumeric characters - with increased field angle and higher contrast involves polariser and analyser

Country Status (3)

Country Link
JP (1) JPS5133999A (en)
DE (1) DE2531806A1 (en)
FR (1) FR2279183A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2848555A1 (en) * 1977-11-10 1979-11-29 Int Standard Electric Corp Liquid crystal cell with smectic material - which has negative dielectric anisotropy and cools layer to smectic phase adopting homeotropic alignment
DE2848598A1 (en) * 1977-11-10 1979-05-17 Int Standard Electric Corp Liq. crystal memory indicator element - has crystal located between two cover plates having electrodes coated to avoid focally conical domains
JPS56111835A (en) * 1980-02-12 1981-09-03 Toshiba Corp Liquid-crystal display element
US6327010B1 (en) 1992-02-03 2001-12-04 Merck Patent Gesellschaft Mit Beschrankter Haftung Electrooptical system
US5477358A (en) * 1993-06-21 1995-12-19 Case Western Reserve University Chiral nematic liquid crystal display with homeotropic alignment and negative dielectric anisotropy

Also Published As

Publication number Publication date
JPS5133999A (en) 1976-03-23
FR2279183B1 (en) 1977-03-18
DE2531806A1 (en) 1976-01-29

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Legal Events

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