GB1450493A - Display devices comprising normal liquid crystal films - Google Patents

Display devices comprising normal liquid crystal films

Info

Publication number
GB1450493A
GB1450493A GB2070674A GB2070674A GB1450493A GB 1450493 A GB1450493 A GB 1450493A GB 2070674 A GB2070674 A GB 2070674A GB 2070674 A GB2070674 A GB 2070674A GB 1450493 A GB1450493 A GB 1450493A
Authority
GB
United Kingdom
Prior art keywords
liquid crystal
layer
normal
crystal phase
display devices
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
GB2070674A
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of GB1450493A publication Critical patent/GB1450493A/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
    • G02F1/133734—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by obliquely evaporated films, e.g. Si or SiO2 films
    • 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)
  • Spectroscopy & Molecular Physics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)

Abstract

1450493 Controlling light SIEMENS AG 10 May 1974 [18 June 1973] 20706/74 Heading G2F [Also in Divisions C6-7] The surface of a substrate in contact with a liquid crystal phase includes a vapour deposited layer of material with a columnar structure normal to the surface over the whole area of the layer, e.g. magnesium or thorium fluoride, aluminium or thorium oxide, zinc sulphide, whereby the liquid crystal molecules adjacent the layer assume a normal homotropic orientation. The vapour deposition source is preferably spaced from the surface by a distance large compared with any linear dimension of the surface. Limited areas only of the surface may be coated. The induced orientation is useful for example in devices where application of an electric field realigns the molecules, charging the birefringence of the liquid crystal phase, which may be disposed between polarizers for optical intensity modulation.
GB2070674A 1973-06-18 1974-05-10 Display devices comprising normal liquid crystal films Expired GB1450493A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732330909 DE2330909B2 (en) 1973-06-18 1973-06-18 METHOD FOR GENERATING A LAYER FOR HOMOEOTROPIC ORIENTATION OF LIQUID CRYSTALS

Publications (1)

Publication Number Publication Date
GB1450493A true GB1450493A (en) 1976-09-22

Family

ID=5884307

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2070674A Expired GB1450493A (en) 1973-06-18 1974-05-10 Display devices comprising normal liquid crystal films

Country Status (5)

Country Link
JP (1) JPS5037453A (en)
DE (1) DE2330909B2 (en)
FR (1) FR2233644B1 (en)
GB (1) GB1450493A (en)
IT (1) IT1014934B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2358481A (en) * 1997-04-14 2001-07-25 Merck Patent Gmbh Homeotropically aligned liquid crystal
GB2324382B (en) * 1997-04-14 2001-10-10 Merck Patent Gmbh Homeotropically aligned liquid crystal layer and process for the homeotropic alignment of liquid crystals on plastic substrates

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5343411B2 (en) * 1973-10-20 1978-11-20
JPS5343412B2 (en) * 1973-10-20 1978-11-20
JPS50101047A (en) * 1974-01-08 1975-08-11
GB1540838A (en) * 1974-12-04 1979-02-14 Omron Tateisi Electronics Co Long life high contrast liquid crystal display

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4976543A (en) * 1972-11-03 1974-07-24
JPS5439745B2 (en) * 1972-11-14 1979-11-29
JPS542579B2 (en) * 1972-11-14 1979-02-09
JPS4975354A (en) * 1972-11-22 1974-07-20

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2358481A (en) * 1997-04-14 2001-07-25 Merck Patent Gmbh Homeotropically aligned liquid crystal
GB2324382B (en) * 1997-04-14 2001-10-10 Merck Patent Gmbh Homeotropically aligned liquid crystal layer and process for the homeotropic alignment of liquid crystals on plastic substrates
GB2358481B (en) * 1997-04-14 2001-10-10 Merck Patent Gmbh Homeotropically aligned liquid crystal layer and process for the homeotropic alignment of liquid crystals on plastic substrates

Also Published As

Publication number Publication date
IT1014934B (en) 1977-04-30
FR2233644B1 (en) 1977-10-07
DE2330909B2 (en) 1977-04-07
FR2233644A1 (en) 1975-01-10
JPS5037453A (en) 1975-04-08
DE2330909A1 (en) 1975-01-09

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Legal Events

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