GB1464791A - Electro-optic devices - Google Patents

Electro-optic devices

Info

Publication number
GB1464791A
GB1464791A GB999074A GB999074A GB1464791A GB 1464791 A GB1464791 A GB 1464791A GB 999074 A GB999074 A GB 999074A GB 999074 A GB999074 A GB 999074A GB 1464791 A GB1464791 A GB 1464791A
Authority
GB
United Kingdom
Prior art keywords
optically active
active material
aminobenzonitrile
liquid crystal
pitch
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.)
Expired
Application number
GB999074A
Other languages
English (en)
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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
Priority claimed from US00339368A external-priority patent/US3833287A/en
Priority claimed from US00419613A external-priority patent/US3837730A/en
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB1464791A publication Critical patent/GB1464791A/en
Expired 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
    • G02F1/13731—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
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
    • C09K19/58—Dopants or charge transfer agents
    • C09K19/586—Optically active dopants; chiral dopants
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
    • C09K19/60—Pleochroic dyes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Liquid Crystal Substances (AREA)
GB999074A 1973-03-08 1974-03-06 Electro-optic devices Expired GB1464791A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US00339368A US3833287A (en) 1973-03-08 1973-03-08 Guest-host liquid crystal device
US00419613A US3837730A (en) 1973-11-28 1973-11-28 Matrix-addressed liquid crystal display

Publications (1)

Publication Number Publication Date
GB1464791A true GB1464791A (en) 1977-02-16

Family

ID=26991601

Family Applications (1)

Application Number Title Priority Date Filing Date
GB999074A Expired GB1464791A (en) 1973-03-08 1974-03-06 Electro-optic devices

Country Status (4)

Country Link
JP (1) JPS6222153B2 (sv)
DE (1) DE2410557C2 (sv)
FR (1) FR2220804B1 (sv)
GB (1) GB1464791A (sv)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2129954A (en) * 1982-10-22 1984-05-23 Stc Plc Liquid crystal display device

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5638924B2 (sv) * 1973-12-20 1981-09-09
GB1571496A (en) * 1976-05-04 1980-07-16 Standard Telephones Cables Ltd Cholesteric liquid crystal cells
CH614828GA3 (en) * 1976-06-16 1979-12-28 Liquid-crystal display with a guest/host liquid-crystal layer and method for producing this liquid-crystal display
FR2356173A1 (fr) * 1976-06-21 1978-01-20 Gen Electric Procede pour ameliorer le temps de descente d'un dispositif d'affichage a composition de cristaux liquides nematique en helice
DE2706405C3 (de) * 1977-02-15 1985-08-01 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V., 8000 Muenchen Anzeigeanordnung zur Darstellung von hellen Bildern vor dunklem Hintergrund
JPS53102055A (en) * 1977-02-18 1978-09-06 Toshiba Corp Liquid crystal color display element
CH629001A5 (fr) * 1978-02-06 1982-03-31 Ebauches Sa Cellule d'affichage electro-optique passif.
JPS5923328A (ja) * 1982-07-29 1984-02-06 Sharp Corp 液晶表示装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT946051B (it) * 1970-12-04 1973-05-21 Hoffmann La Roche Cellula ottica

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2129954A (en) * 1982-10-22 1984-05-23 Stc Plc Liquid crystal display device
US4508427A (en) * 1982-10-22 1985-04-02 International Standard Electric Corporation Liquid crystal display device

Also Published As

Publication number Publication date
DE2410557C2 (de) 1984-08-30
FR2220804B1 (sv) 1976-10-08
JPS6222153B2 (sv) 1987-05-15
JPS49127645A (sv) 1974-12-06
DE2410557A1 (de) 1974-09-12
FR2220804A1 (sv) 1974-10-04

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee