GB1509180A - Liquid crystal devices - Google Patents

Liquid crystal devices

Info

Publication number
GB1509180A
GB1509180A GB5212374A GB5212374A GB1509180A GB 1509180 A GB1509180 A GB 1509180A GB 5212374 A GB5212374 A GB 5212374A GB 5212374 A GB5212374 A GB 5212374A GB 1509180 A GB1509180 A GB 1509180A
Authority
GB
United Kingdom
Prior art keywords
liquid crystal
dichroic
sheet
crystal material
nematic
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
GB5212374A
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.)
Secretary of State for Defence Canada
UK Secretary of State for Defence
Original Assignee
Secretary of State for Defence Canada
UK Secretary of State for Defence
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 Secretary of State for Defence Canada, UK Secretary of State for Defence filed Critical Secretary of State for Defence Canada
Priority to GB5212374A priority Critical patent/GB1509180A/en
Priority to JP14377475A priority patent/JPS5185735A/en
Priority to FR7536854A priority patent/FR2293722A1/en
Priority to US05/715,263 priority patent/US4048358A/en
Publication of GB1509180A publication Critical patent/GB1509180A/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
    • G02F1/13725—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 guest-host interaction
    • 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
    • G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals

Abstract

1509180 Controlling light DEFENCE SECRETARY OF STATE FOR 26 Nov 1975 [2 Dec 1974] 52123/74 Heading G2F [Also in Divisions H3-5] At least part of a plastics sheet, e.g. of polypropylene, with an open pore structure is impregnated with liquid crystal material. Other parts of the sheet may contain a non-mesomorphic organic liquid such as lubricating oil. The liquid crystal material may be painted, printed or sprayed on to one or both faces of the sheet and absorbed by capillary action. The pores, which may vary in size from molecular dimension of the liquid crystal material to 100Á, may be elongate and aligned, whereby the liquid crystal molecules also tend to align. If the liquid crystal material is dichroic, or contains a dichroic additive, a dichroic polarizing layer results. Such may be used for example as (coloured) polarizers either side of an electro-optic nematic "twist" cell; or two such sheets comprising a series of dichroic strips respectively in register with the odd and even lines of a television display and with mutually orthogonal polarizing directions, may provide a stereoscopic display when viewed using spectacles having lenses with mutually orthogonal polarizing directions. The sheet may be coated with lacquer on either side, or may be arranged between electrode bearing glass plates. In the latter arrangement, in which the liquid crystal thickness can be made substantially constant, the liquid crystal material can exhibit dynamic scattering (cholesteric in a nematic host) or a change in colour when viewed via a polarizer (dichroic material in a nematic host, or dichroic nematic material). If the sheet contains either of the latter two types of material and is heated above the isotropic point, changes in colour can be observed using an analyzer.
GB5212374A 1974-12-02 1974-12-02 Liquid crystal devices Expired GB1509180A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB5212374A GB1509180A (en) 1974-12-02 1974-12-02 Liquid crystal devices
JP14377475A JPS5185735A (en) 1974-12-02 1975-12-01 EKISHOSOCHI
FR7536854A FR2293722A1 (en) 1974-12-02 1975-12-02 LIQUID CRYSTAL DEVICE
US05/715,263 US4048358A (en) 1974-12-02 1976-08-18 Liquid crystal devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5212374A GB1509180A (en) 1974-12-02 1974-12-02 Liquid crystal devices

Publications (1)

Publication Number Publication Date
GB1509180A true GB1509180A (en) 1978-04-26

Family

ID=10462728

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5212374A Expired GB1509180A (en) 1974-12-02 1974-12-02 Liquid crystal devices

Country Status (3)

Country Link
JP (1) JPS5185735A (en)
FR (1) FR2293722A1 (en)
GB (1) GB1509180A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2217011A (en) * 1988-02-23 1989-10-18 Secr Defence Surface temperature mapping using liquid crystal materials

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57188015A (en) * 1981-05-15 1982-11-18 Ricoh Co Ltd Production of liquid crystal display device
US4435047A (en) * 1981-09-16 1984-03-06 Manchester R & D Partnership Encapsulated liquid crystal and method
JPS63144321A (en) * 1986-12-08 1988-06-16 Fuji Photo Film Co Ltd Liquid crystal display element and its production
GB8827277D0 (en) * 1987-12-16 1988-12-29 Ici Plc Process for producing liquid crystal devices

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2400877A (en) * 1941-03-21 1946-05-28 John F Dreyer Optical device and method and manufacture thereof
GB771074A (en) * 1952-07-04 1957-03-27 Pola Lux Ges Fuer Blendschutz Polarising filter and manufacture thereof
DE2103591A1 (en) * 1971-01-26 1972-08-10 Siemens Ag Foil-like display screen with liquid crystals as an optically active medium
US3746426A (en) * 1972-02-10 1973-07-17 J Masi Liquid crystal cell and method for its manufacture
JPS4946954A (en) * 1972-09-11 1974-05-07

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2217011A (en) * 1988-02-23 1989-10-18 Secr Defence Surface temperature mapping using liquid crystal materials

Also Published As

Publication number Publication date
FR2293722A1 (en) 1976-07-02
FR2293722B1 (en) 1981-05-29
JPS5185735A (en) 1976-07-27
JPS6245521B2 (en) 1987-09-28

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Legal Events

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