HK1060772A1 - High contrast black-and-white cholesteric liquid crystal display - Google Patents

High contrast black-and-white cholesteric liquid crystal display

Info

Publication number
HK1060772A1
HK1060772A1 HK04103646A HK04103646A HK1060772A1 HK 1060772 A1 HK1060772 A1 HK 1060772A1 HK 04103646 A HK04103646 A HK 04103646A HK 04103646 A HK04103646 A HK 04103646A HK 1060772 A1 HK1060772 A1 HK 1060772A1
Authority
HK
Hong Kong
Prior art keywords
liquid crystal
high contrast
chiral nematic
white
crystal display
Prior art date
Application number
HK04103646A
Other languages
English (en)
Inventor
Fu On Tsang
Richard C H Lee
Original Assignee
Varintelligent Bvi Ltd
Johnson Terence Leslie
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 GB0217384A external-priority patent/GB0217384D0/en
Priority claimed from GB0217917A external-priority patent/GB0217917D0/en
Application filed by Varintelligent Bvi Ltd, Johnson Terence Leslie filed Critical Varintelligent Bvi Ltd
Publication of HK1060772A1 publication Critical patent/HK1060772A1/xx

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3622—Control of matrices with row and column drivers using a passive matrix
    • G09G3/3629—Control of matrices with row and column drivers using a passive matrix using liquid crystals having memory effects, e.g. ferroelectric liquid crystals
    • G09G3/3637—Control of matrices with row and column drivers using a passive matrix using liquid crystals having memory effects, e.g. ferroelectric liquid crystals with intermediate tones displayed by domain size control
    • 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
    • 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
    • G02F1/13718—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 a change of the texture state of a cholesteric liquid crystal
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • G02F1/133638—Waveplates, i.e. plates with a retardation value of lambda/n
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0469—Details of the physics of pixel operation
    • G09G2300/0478—Details of the physics of pixel operation related to liquid crystal pixels
    • G09G2300/0482—Use of memory effects in nematic liquid crystals
    • G09G2300/0486—Cholesteric liquid crystals, including chiral-nematic liquid crystals, with transitions between focal conic, planar, and homeotropic states

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal (AREA)
  • Polarising Elements (AREA)
  • Liquid Crystal Substances (AREA)
HK04103646A 2002-07-26 2004-05-22 High contrast black-and-white cholesteric liquid crystal display HK1060772A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0217384A GB0217384D0 (en) 2002-07-26 2002-07-26 High contrast black-and-white chiral nematic displays
GB0217917A GB0217917D0 (en) 2002-08-01 2002-08-01 High contrast black-and-white chiral nematic displays

Publications (1)

Publication Number Publication Date
HK1060772A1 true HK1060772A1 (en) 2004-08-20

Family

ID=30001990

Family Applications (1)

Application Number Title Priority Date Filing Date
HK04103646A HK1060772A1 (en) 2002-07-26 2004-05-22 High contrast black-and-white cholesteric liquid crystal display

Country Status (9)

Country Link
US (2) US20040125284A1 (xx)
EP (1) EP1385044B1 (xx)
JP (1) JP2004070326A (xx)
KR (1) KR20040010383A (xx)
CN (1) CN1477429A (xx)
AT (1) ATE338964T1 (xx)
DE (1) DE60308108T2 (xx)
HK (1) HK1060772A1 (xx)
TW (1) TW200401915A (xx)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0401510D0 (en) * 2004-01-23 2004-02-25 Varintelligent Bvi Ltd Novel optical configurations in high contrast chiral nematic liquid crystal displays
US20060134564A1 (en) * 2004-12-20 2006-06-22 Eastman Kodak Company Reflective display based on liquid crystal materials
JP2010266591A (ja) * 2009-05-13 2010-11-25 Fujitsu Ltd 表示素子
CN102540541A (zh) * 2012-03-20 2012-07-04 鞍山亚世光电显示有限公司 一种双稳态液晶显示器
US9541794B2 (en) 2014-01-10 2017-01-10 Apple Inc. High dynamic range liquid crystal display
JPWO2022091777A1 (xx) * 2020-10-29 2022-05-05

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992019695A2 (en) * 1991-05-02 1992-11-12 Kent State University Crystalline light modulating device and material
US5251048A (en) * 1992-05-18 1993-10-05 Kent State University Method and apparatus for electronic switching of a reflective color display
US5625477A (en) * 1994-04-11 1997-04-29 Advanced Display Systems, Inc. Zero field multistable cholesteric liquid crystal displays
US5889566A (en) * 1994-04-11 1999-03-30 Advanced Display Systems, Inc. Multistable cholesteric liquid crystal devices driven by width-dependent voltage pulse
US5644330A (en) * 1994-08-11 1997-07-01 Kent Displays, Inc. Driving method for polymer stabilized and polymer free liquid crystal displays
US5748277A (en) * 1995-02-17 1998-05-05 Kent State University Dynamic drive method and apparatus for a bistable liquid crystal display
US6154190A (en) * 1995-02-17 2000-11-28 Kent State University Dynamic drive methods and apparatus for a bistable liquid crystal display
US5758277A (en) * 1996-09-19 1998-05-26 Corsair Communications, Inc. Transient analysis system for characterizing RF transmitters by analyzing transmitted RF signals
US5796454A (en) * 1996-12-04 1998-08-18 Advanced Display Systems, Inc. Cholesteric liquid crystal display employing circular polarizer and methods of operation and manufacture therefor
US5933203A (en) * 1997-01-08 1999-08-03 Advanced Display Systems, Inc. Apparatus for and method of driving a cholesteric liquid crystal flat panel display
US5877826A (en) * 1997-02-06 1999-03-02 Kent State University Dual frequency switchable cholesteric liquid crystal light shutter and driving waveform
US6268840B1 (en) * 1997-05-12 2001-07-31 Kent Displays Incorporated Unipolar waveform drive method and apparatus for a bistable liquid crystal display
US6133895A (en) * 1997-06-04 2000-10-17 Kent Displays Incorporated Cumulative drive scheme and method for a liquid crystal display
US6268839B1 (en) * 1998-05-12 2001-07-31 Kent State University Drive schemes for gray scale bistable cholesteric reflective displays
US6204835B1 (en) * 1998-05-12 2001-03-20 Kent State University Cumulative two phase drive scheme for bistable cholesteric reflective displays
JP2000178557A (ja) * 1998-12-14 2000-06-27 Minolta Co Ltd 液晶組成物及び液晶光変調素子
US6320563B1 (en) * 1999-01-21 2001-11-20 Kent State University Dual frequency cholesteric display and drive scheme
US6344887B1 (en) * 1999-09-10 2002-02-05 Yao-Dong Ma Full spectrum reflective choleterics display employing circular polarizers with the same polarity but different disposition
US6812913B2 (en) * 2000-02-17 2004-11-02 Minolta Co., Ltd. Liquid crystal display driving method and liquid crystal display device
JP2002357851A (ja) * 2001-03-30 2002-12-13 Minolta Co Ltd 液晶表示装置
US6462805B1 (en) * 2001-06-04 2002-10-08 Display Research, Inc. Reverse-mode direct-view display employing a liquid crystal having a characteristic wavelength in the non-visible spectrum
US20030160923A1 (en) * 2002-02-19 2003-08-28 Yao-Dong Ma Full color cholesteric displays employing cholesteric color filter
US6757039B2 (en) * 2002-06-17 2004-06-29 Yao-Dong Ma Paper white cholesteric displays employing reflective elliptical polarizer
JP2004333999A (ja) * 2003-05-09 2004-11-25 Mitsubishi Electric Corp 反射型液晶表示装置

Also Published As

Publication number Publication date
ATE338964T1 (de) 2006-09-15
EP1385044A1 (en) 2004-01-28
EP1385044A8 (en) 2004-05-12
US20060098141A1 (en) 2006-05-11
KR20040010383A (ko) 2004-01-31
US20040125284A1 (en) 2004-07-01
DE60308108D1 (de) 2006-10-19
DE60308108T2 (de) 2007-04-05
CN1477429A (zh) 2004-02-25
JP2004070326A (ja) 2004-03-04
EP1385044B1 (en) 2006-09-06
TW200401915A (en) 2004-02-01

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Legal Events

Date Code Title Description
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)

Effective date: 20200723