GB2315877A - Liquid crystal alignment materials and devices - Google Patents

Liquid crystal alignment materials and devices

Info

Publication number
GB2315877A
GB2315877A GB9724101A GB9724101A GB2315877A GB 2315877 A GB2315877 A GB 2315877A GB 9724101 A GB9724101 A GB 9724101A GB 9724101 A GB9724101 A GB 9724101A GB 2315877 A GB2315877 A GB 2315877A
Authority
GB
United Kingdom
Prior art keywords
liquid crystal
polymer
alignment layer
layer
per square
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
GB9724101A
Other versions
GB9724101D0 (en
GB2315877B (en
Inventor
Julian Hollingshurst
John William Goodby
Ian Charles Sage
Guy Peter Bryan-Brown
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.)
UK Secretary of State for Defence
Original Assignee
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
Priority claimed from GBGB9607059.4A external-priority patent/GB9607059D0/en
Application filed by UK Secretary of State for Defence filed Critical UK Secretary of State for Defence
Priority to GB9724101A priority Critical patent/GB2315877B/en
Publication of GB9724101D0 publication Critical patent/GB9724101D0/en
Publication of GB2315877A publication Critical patent/GB2315877A/en
Application granted granted Critical
Publication of GB2315877B publication Critical patent/GB2315877B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G02F1/133711—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric 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
    • G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
    • G02F1/133788—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation by light irradiation, e.g. linearly polarised light photo-polymerisation

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

An alignment layer for a liquid crystal device comprises or containing a polymer of structure (I) in which C represents a carbon atom, A is selected from H, Cl, F, CN, CO 2 R, OCOR, OR, where R is a straight chain or branched alkyl group having 1 to 15 carbon atoms, X and Y are independently selected from the same groups as A, subject to at least one of X and Y on each C atom being selected from F and H, B is a linking group comprising a single bond, or a chain of from 1 to 15 methylene groups in which one or more non-adjacent methylenes may be replaced by O, CO 2 , OCO, P is a photoactive group selected from cinnamate or anthracene groups substituted with at least one group selected from F, Cl, CN, CF 3 , OCF 3 , Br, wherein the interfacial energy of the polymer surface is within 3.0 ergs per square centimetre if the liquid crystal surface energy, and in the range 35 to 50 ergs per square centimetre. A method of providing an alignment layer on a surface of a liquid crystal cell wall includes the step of depositing a layer of a polymer containing at least one polymer as described above on the surface, followed by irradiation with polarised actinic light, and controlling the exposure time and/or intensity of light used to provide a selected value of pretilt in a liquid crystal placed in contact with the exposed layer. The alignment layer formed as above may be used to provide one or both alignment layers on the two walls of a liquid crystal cell. The cell may incorporate nematic, cholesteric, or a smectic liquid crystal material.
GB9724101A 1996-04-03 1997-03-19 Liquid crystal alignment materials and devices Expired - Fee Related GB2315877B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9724101A GB2315877B (en) 1996-04-03 1997-03-19 Liquid crystal alignment materials and devices

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9607059.4A GB9607059D0 (en) 1996-04-03 1996-04-03 Liquid crystal alignment materials and devices
PCT/GB1997/000745 WO1997038349A1 (en) 1996-04-03 1997-03-19 Liquid crystal alignment materials and devices
GB9724101A GB2315877B (en) 1996-04-03 1997-03-19 Liquid crystal alignment materials and devices

Publications (3)

Publication Number Publication Date
GB9724101D0 GB9724101D0 (en) 1998-01-14
GB2315877A true GB2315877A (en) 1998-02-11
GB2315877B GB2315877B (en) 2000-10-04

Family

ID=26309056

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9724101A Expired - Fee Related GB2315877B (en) 1996-04-03 1997-03-19 Liquid crystal alignment materials and devices

Country Status (1)

Country Link
GB (1) GB2315877B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0611786A1 (en) * 1993-02-17 1994-08-24 F. Hoffmann-La Roche Ag Orientation layer for liquid crystals
DE4417409A1 (en) * 1993-05-20 1994-11-24 Gold Star Co Thermostable photopolymer material for alignment of liquid crystals
GB2281977A (en) * 1993-09-18 1995-03-22 Gold Star Co Orientation film for a liquid crystal display
EP0742471A2 (en) * 1995-05-10 1996-11-13 Stanley Electric Co., Ltd. Arrangement for rubbingless orientation of liquid crystals with tilt

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9519860D0 (en) * 1995-09-29 1995-11-29 Secr Defence Polymers for liquid crystal alignment
KR0179115B1 (en) * 1995-11-20 1999-05-01 구자홍 The photoresist material for lcd orientation layer and its application lcd
KR0181782B1 (en) * 1995-12-08 1999-05-01 구자홍 A method for manufacturing bend-aligned liquid crystal cell using light

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0611786A1 (en) * 1993-02-17 1994-08-24 F. Hoffmann-La Roche Ag Orientation layer for liquid crystals
DE4417409A1 (en) * 1993-05-20 1994-11-24 Gold Star Co Thermostable photopolymer material for alignment of liquid crystals
GB2281977A (en) * 1993-09-18 1995-03-22 Gold Star Co Orientation film for a liquid crystal display
EP0742471A2 (en) * 1995-05-10 1996-11-13 Stanley Electric Co., Ltd. Arrangement for rubbingless orientation of liquid crystals with tilt

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Japanese Journal of Applied Physics vol.34 no. 8A pp.L1000-2 *

Also Published As

Publication number Publication date
GB9724101D0 (en) 1998-01-14
GB2315877B (en) 2000-10-04

Similar Documents

Publication Publication Date Title
ATE150069T1 (en) LIQUID CRYSTAL DEVICE, DISPLAY DEVICE AND DISPLAY METHOD
KR890007111A (en) Liquid crystal device and manufacturing method thereof
DK0387059T3 (en) Method of orienting a liquid crystal medium in line
JPS5521479A (en) Liquid crystal polymer phase having cholesteric structure and its manufacture
ES2054270T3 (en) CERAMIC COATINGS, SUBSTRATE COATING PROCEDURES AND SUBSTRATES SO OBTAINED.
DE50002234D1 (en) Chiral compounds and their use as chiral dopants for the production of cholesteric liquid crystalline compositions
DE3781553D1 (en) CHIRAL LIQUID CRYSTAL COMPOUNDS.
EP0848279A3 (en) Liquid crystal devices
DE59800253D1 (en) Mixture containing pigments with a liquid-crystalline structure with a chiral phase and their use
GB2306498A (en) Ferroelectric liquid crystal devices
Lee et al. Light-scattering-mode optical switching and image storage in polymer/liquid crystal composite films by means of photochemical phase transition
DK315988A (en) METHOD AND APPARATUS FOR SUSTAINABILITY OF LIQUID CRYSTALS WITH IMPROVED PHOTO STABILITY
Jakli et al. Indication of ferroelectricity in columnar mesophases of pyramidic molecules
GB2315877A (en) Liquid crystal alignment materials and devices
EP0810464A3 (en) Manufacture of liquid crystal display device using polarization storage film as alignment film
KR960702503A (en) Liquid crystal polymers
Czarnecki et al. Dynamical Behavior of Surface-Stabilized States of Ferroelectric Liquid Crystals in Electric Field Studied by Time-Resolved FT-IR Spectroscopy
Pikas et al. Electrically switchable reflection holograms formed using two-photon photopolymerization
Kunihiroichimura Polarization Photochromsm of Polymer Thin Films and Its Applications
Syromyatnikov et al. Naphthalene containing polymers as new photoaligning materials for LCs
EP0544923A4 (en) Process for producing liquid crystal alignment film
JPS5716419A (en) Liquid crystal display device
Aoyama et al. Xerographic and electro-optic studies of a photorefractive polymer
Kimura et al. Numerical calculatiqns of electroclinic effect: effect of the polar anchoring strength
JPS5422444A (en) Polyurethane adhesive for asphalt concrete

Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20100319