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GB1478592A - Liquid crystal devices - Google Patents

Liquid crystal devices

Info

Publication number
GB1478592A
GB1478592A GB948974A GB948974A GB1478592A GB 1478592 A GB1478592 A GB 1478592A GB 948974 A GB948974 A GB 948974A GB 948974 A GB948974 A GB 948974A GB 1478592 A GB1478592 A GB 1478592A
Authority
GB
United Kingdom
Prior art keywords
layer
parallel
alignment
evaporation
degrees
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
GB948974A
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.)
SECR DEFENCE
Secretary of State for Defence Canada
Original Assignee
SECR DEFENCE
Secretary of State for Defence Canada
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 SECR DEFENCE, Secretary of State for Defence Canada filed Critical SECR DEFENCE
Priority to GB948974A priority Critical patent/GB1478592A/en
Priority to CH259675A priority patent/CH575605A5/xx
Priority to DE19752508913 priority patent/DE2508913C2/en
Priority to FR7506377A priority patent/FR2268277B2/fr
Priority to JP50025534A priority patent/JPS5826006B2/en
Priority to US05/768,371 priority patent/US4084884A/en
Publication of GB1478592A publication Critical patent/GB1478592A/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
    • G02F1/133—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
    • 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
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
    • C09K19/12—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings at least two benzene rings directly linked, e.g. biphenyls
    • 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

Landscapes

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

Abstract

1478592 Controlling light DEFENCE SECRETARY OF STATE FOR 28 Feb 1975 [1 March 1974] 9489/74 Heading G2F In a "twist" liquid crystal cell, a layer of naturally optically active liquid crystal material with a natural molecular helical pitch of the order of or greater than twice the thickness of the layer is disposed between electrode substrates, the substrate surface being arranged such that at one surface of the layer the average molecular alignment is parallel to the surface and at the other surface the alignment is tilted. Fig. 2 (d) shows an analogous arrangement for a non-twisted device i.e. the alignments adjacent the surfaces LU and LR appear parallel when viewed along a normal to the surfaces. Rotation of one surface about an angle # # 90 degrees would give a "twist" cell. Due to the initial tilt, all molecules tend to rotate in the same sense when a field is applied across the layer. Use of an optically active material precludes the formation of domains of reverse twist. The substrate surface for inducing parallel alignment is prepared by oblique evaporation of a dielectric material in a direction making an angle of 45-75 degrees relative to the surface normal. The molecules tend to align transversely to the projection of the evaporation direction on the surface. The second substrate surface of unidirectional tilted alignment is prepared (a) as the first substrate surface followed by uni-directional rubbing transversely of the evaporation direction; (b) simple uni-directional rubbing of the surface; or (c) oblique evaporation of a dielectric material at a grazing angle of 0-15 degrees. In (a) and (b) the projection of the molecular alignment direction is parallel to the rubbing direction and in (c) it is parallel to the evaporation direction. The molecular alignment direction at one layer surface is arranged to be at an angle e.g. 90 degrees to that of the other surface. As described, the cell may be disposed between polarizers and the electrodes may be sloped or segmented e.g. in a coincidence addressed matrix.
GB948974A 1974-02-21 1974-03-01 Liquid crystal devices Expired GB1478592A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB948974A GB1478592A (en) 1974-03-01 1974-03-01 Liquid crystal devices
CH259675A CH575605A5 (en) 1974-03-01 1975-02-28
DE19752508913 DE2508913C2 (en) 1974-03-01 1975-02-28 Liquid crystal cell and process for their manufacture
FR7506377A FR2268277B2 (en) 1974-03-01 1975-02-28
JP50025534A JPS5826006B2 (en) 1974-03-01 1975-02-28 lcd cell
US05/768,371 US4084884A (en) 1974-02-21 1977-02-14 Liquid crystal devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB948974A GB1478592A (en) 1974-03-01 1974-03-01 Liquid crystal devices

Publications (1)

Publication Number Publication Date
GB1478592A true GB1478592A (en) 1977-07-06

Family

ID=9872940

Family Applications (1)

Application Number Title Priority Date Filing Date
GB948974A Expired GB1478592A (en) 1974-02-21 1974-03-01 Liquid crystal devices

Country Status (5)

Country Link
JP (1) JPS5826006B2 (en)
CH (1) CH575605A5 (en)
DE (1) DE2508913C2 (en)
FR (1) FR2268277B2 (en)
GB (1) GB1478592A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4326279A (en) 1979-01-26 1982-04-20 National Research Development Corporation Analogue displays
GB2119110A (en) * 1979-05-29 1983-11-09 Texas Instruments Inc Liquid crystal display cell
EP0132377A2 (en) 1983-07-22 1985-01-30 The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Compounds containing a fluorobiphenylyl group and their use in liquid crystal materials and device
CN109648850A (en) * 2019-01-16 2019-04-19 深圳市信维通信股份有限公司 A kind of forming method of 3D printing nozzle and liquid crystal polymer film

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5194845A (en) * 1975-02-18 1976-08-19 Ekishohyojisochino seizohoho
DE2527485C2 (en) 1975-06-20 1985-06-05 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Electrically controllable display element
JPS5296044A (en) * 1976-02-09 1977-08-12 Shiyunsuke Kobayashi Liquid crystal display unit
JPS52111740A (en) * 1976-03-16 1977-09-19 Oki Electric Ind Co Ltd Liquid crystal indicator
JPS5349449A (en) * 1976-10-18 1978-05-04 Seiko Instr & Electronics Ltd Liquid crystal indicator
CH611043A5 (en) * 1977-01-21 1979-05-15 Ebauches Sa
JPS55142316A (en) * 1979-04-23 1980-11-06 Denki Onkyo Co Ltd Liquid crystal display device
JPS5651722A (en) * 1979-10-03 1981-05-09 Sanyo Electric Co Ltd Liquid crystal display device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3650603A (en) * 1967-12-05 1972-03-21 Rca Corp Liquid crystal light valve containing a mixture of nematic and cholesteric materials in which the light scattering effect is reduced when an electric field is applied
IT946051B (en) * 1970-12-04 1973-05-21 Hoffmann La Roche OPTICAL CELL
FR2135940A5 (en) * 1971-02-09 1972-12-22 Int Liquid Xtal Co
JPS49123641A (en) * 1973-03-30 1974-11-26
GB1472247A (en) * 1974-02-21 1977-05-04 Secr Defence Liquid crystal devices

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4326279A (en) 1979-01-26 1982-04-20 National Research Development Corporation Analogue displays
GB2119110A (en) * 1979-05-29 1983-11-09 Texas Instruments Inc Liquid crystal display cell
EP0132377A2 (en) 1983-07-22 1985-01-30 The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Compounds containing a fluorobiphenylyl group and their use in liquid crystal materials and device
CN109648850A (en) * 2019-01-16 2019-04-19 深圳市信维通信股份有限公司 A kind of forming method of 3D printing nozzle and liquid crystal polymer film
CN109648850B (en) * 2019-01-16 2023-10-17 深圳市信维通信股份有限公司 3D printing nozzle and forming method of liquid crystal polymer film

Also Published As

Publication number Publication date
JPS5826006B2 (en) 1983-05-31
DE2508913A1 (en) 1976-01-29
JPS519856A (en) 1976-01-26
FR2268277A2 (en) 1975-11-14
DE2508913C2 (en) 1985-08-08
CH575605A5 (en) 1976-05-14
FR2268277B2 (en) 1983-04-08

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19950227