AU2001278573A1 - Liquid crystal device - Google Patents

Liquid crystal device

Info

Publication number
AU2001278573A1
AU2001278573A1 AU2001278573A AU7857301A AU2001278573A1 AU 2001278573 A1 AU2001278573 A1 AU 2001278573A1 AU 2001278573 A AU2001278573 A AU 2001278573A AU 7857301 A AU7857301 A AU 7857301A AU 2001278573 A1 AU2001278573 A1 AU 2001278573A1
Authority
AU
Australia
Prior art keywords
liquid crystal
stable
configurations
crystal device
alignment grating
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.)
Abandoned
Application number
AU2001278573A
Inventor
Carl Vernon Brown
Guy Peter Bryan-Brown
Victor Hui
John Clifford Jones
Emma Louise Wood
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.)
Qinetiq Ltd
Original Assignee
Qinetiq Ltd
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 Qinetiq Ltd filed Critical Qinetiq Ltd
Publication of AU2001278573A1 publication Critical patent/AU2001278573A1/en
Abandoned 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
    • G02F1/139—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
    • G02F1/1391—Bistable or multi-stable liquid crystal cells
    • 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
    • C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
    • 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
    • C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
    • C09K2323/02—Alignment layer characterised by chemical composition
    • 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
    • G02F1/133753—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
    • G02F1/133761—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle with different pretilt angles
    • 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
    • G02F1/133776—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers having structures locally influencing the alignment, e.g. unevenness
    • 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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/30—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 grating

Abstract

Liquid crystal devices are described that exhibit bistable, tri-stable or other multistable operation. The stable liquid crystal configurations are attained using a surface alignment grating ( 144 ) on the internal surface of at least one cell wall ( 142 ). The surface profile of the surface alignment grating comprises three or more defect sites per grating period and permit the liquid crystal molecules to adopt any one of two or more stable pretilt angles in the same azimuthal plane. Application of a suitable voltage causes the liquid crystal material to switch between the stable configurations.
AU2001278573A 2000-07-21 2001-07-18 Liquid crystal device Abandoned AU2001278573A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB0017953.1A GB0017953D0 (en) 2000-07-21 2000-07-21 Liquid crystal device
GB0017953 2000-07-21
PCT/GB2001/003168 WO2002008825A1 (en) 2000-07-21 2001-07-18 Liquid crystal device

Publications (1)

Publication Number Publication Date
AU2001278573A1 true AU2001278573A1 (en) 2002-02-05

Family

ID=9896104

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2001278573A Abandoned AU2001278573A1 (en) 2000-07-21 2001-07-18 Liquid crystal device

Country Status (9)

Country Link
US (1) US7053975B2 (en)
EP (1) EP1301823B1 (en)
JP (1) JP2004505297A (en)
AT (1) ATE448504T1 (en)
AU (1) AU2001278573A1 (en)
DE (1) DE60140449D1 (en)
GB (1) GB0017953D0 (en)
MY (1) MY134139A (en)
WO (1) WO2002008825A1 (en)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9521106D0 (en) * 1995-10-16 1995-12-20 Secr Defence Bistable nematic liquid crystal device
US7460200B2 (en) * 2000-03-27 2008-12-02 Helwett-Packard Development Company, L.P. Liquid crystal alignment
WO2003063126A1 (en) * 2002-01-18 2003-07-31 Kent State University Fast switching dual-frequency liquid crystal cells and methods for driving the same
ATE334464T1 (en) 2002-05-29 2006-08-15 Zbd Displays Ltd DISPLAY DEVICE COMPRISING A MATERIAL HAVING AT LEAST TWO STABLE STATES AND DRIVING METHOD THEREOF
EP1736960A3 (en) * 2002-05-29 2007-05-23 ZBD Displays Limited Display device having a material with at least two stable configurations and driving methods therefore
US7692672B2 (en) 2002-07-04 2010-04-06 Zbd Displays Limited Liquid crystal devices with greyscale
US20060035086A1 (en) * 2002-10-17 2006-02-16 Qinetiq Limited Liquid crystal alignment layer
GB0226784D0 (en) * 2002-11-18 2002-12-24 Qinetiq Ltd Liquid crystal devices with reduced surface anchoring energy
FR2847704B1 (en) * 2002-11-26 2005-01-28 Nemoptic IMPROVED METHOD AND DEVICE FOR BISTABLE NEMATIC LIQUID CRYSTAL DISPLAY
ATE368716T1 (en) * 2002-12-11 2007-08-15 Merck Patent Gmbh FAST SWITCHING LIQUID CRYSTAL COMPOSITIONS FOR USE IN BISTABLE LIQUID CRYSTAL DISPLAYS
CN100469856C (en) * 2002-12-11 2009-03-18 默克专利股份有限公司 Liquid crystal composition for use in bistable liquid crystal devices
EP1445645A1 (en) 2003-02-07 2004-08-11 ZBD Displays Ltd, Liquid crystal device
DE602004009170T2 (en) * 2003-05-08 2008-07-03 Merck Patent Gmbh Liquid crystalline composition for use in bis-bistable liquid crystal displays
US8330932B2 (en) * 2004-12-10 2012-12-11 Industrial Technology Research Institute Bistable watermark
WO2007030717A2 (en) * 2005-09-09 2007-03-15 Wms Gaming Inc. Wagering game system with bistable lcd display
KR101489528B1 (en) * 2007-05-16 2015-02-03 메르크 파텐트 게엠베하 Modulation elements for electromagnetic radiation, modulation device and modulation medium
DE102007035969A1 (en) 2007-07-30 2009-02-05 Hidde, Axel R., Dr. Ceramic valve especially for water systems has a modular construction with fixed and movable cylindrical components
WO2009151716A2 (en) * 2008-03-24 2009-12-17 Kent State University Bistable switchable liquid crystal window
CN110741290B (en) * 2017-07-12 2022-03-11 富士胶片株式会社 Liquid crystal composition, method for producing reflective layer, cured product, and optically anisotropic body
US10996518B1 (en) * 2019-12-26 2021-05-04 Industrial Technology Research Institute Light switchable device
WO2022094618A1 (en) * 2020-10-30 2022-05-05 Kent State University Dual-mode smart switchable liquid crystal window

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4333708A (en) * 1979-11-30 1982-06-08 Bell Telephone Laboratories, Incorporated Mechanically multistable liquid crystal cell
US4472026A (en) * 1982-05-06 1984-09-18 At&T Bell Laboratories Electrothermal matrix addressable liquid crystal display
US5438421A (en) * 1991-04-24 1995-08-01 Alps Electric Co., Ltd. Orientation film of liquid crystal having bilaterally asymmetric ridges separated by grooves
JPH0588177A (en) 1991-09-30 1993-04-09 Toshiba Corp Liquid crystal display element
FR2740894B1 (en) * 1995-11-08 1998-01-23 Centre Nat Rech Scient IMPROVED DISPLAY DEVICE BASED ON LIQUID CRYSTALS AND WITH BISTABLE EFFECT
FR2763145B1 (en) * 1997-05-07 1999-07-30 Centre Nat Rech Scient LIQUID CRYSTAL DEVICE INCLUDING IMPROVED ANCHORING MEANS ON AT LEAST ONE CONTAINMENT PLATE PROVIDING A DEGENERATED ORIENTATION WITHOUT MEMORY
GB9727142D0 (en) * 1997-12-24 1998-02-25 Secr Defence Bistable nematic liquid crystal device
EP1139152A1 (en) * 2000-03-27 2001-10-04 Hewlett-Packard Company, A Delaware Corporation Liquid crystal alignment structure

Also Published As

Publication number Publication date
US20040191427A1 (en) 2004-09-30
EP1301823A1 (en) 2003-04-16
WO2002008825A1 (en) 2002-01-31
EP1301823B1 (en) 2009-11-11
JP2004505297A (en) 2004-02-19
US7053975B2 (en) 2006-05-30
GB0017953D0 (en) 2000-09-13
ATE448504T1 (en) 2009-11-15
DE60140449D1 (en) 2009-12-24
MY134139A (en) 2007-11-30

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