WO1998055987A3 - Cumulative drive scheme and method for a liquid crystal display - Google Patents

Cumulative drive scheme and method for a liquid crystal display Download PDF

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Publication number
WO1998055987A3
WO1998055987A3 PCT/US1998/010207 US9810207W WO9855987A3 WO 1998055987 A3 WO1998055987 A3 WO 1998055987A3 US 9810207 W US9810207 W US 9810207W WO 9855987 A3 WO9855987 A3 WO 9855987A3
Authority
WO
WIPO (PCT)
Prior art keywords
liquid crystal
row
display
rate
column
Prior art date
Application number
PCT/US1998/010207
Other languages
French (fr)
Other versions
WO1998055987A2 (en
Inventor
Xiao-Yang Huang
Original Assignee
Kent Displays Inc
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 Kent Displays Inc filed Critical Kent Displays Inc
Priority to AU77968/98A priority Critical patent/AU7796898A/en
Priority to EP98926044A priority patent/EP0998737A4/en
Priority to JP50248499A priority patent/JP3736645B2/en
Priority to KR1019997011438A priority patent/KR100719274B1/en
Publication of WO1998055987A2 publication Critical patent/WO1998055987A2/en
Publication of WO1998055987A3 publication Critical patent/WO1998055987A3/en

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
    • 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
    • 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
    • G09G3/3674—Details of drivers for scan electrodes
    • G09G3/3681—Details of drivers for scan electrodes suitable for passive matrices only
    • 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
    • G09G3/3685—Details of drivers for data electrodes
    • G09G3/3692—Details of drivers for data electrodes suitable for passive matrices only
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0224—Details of interlacing
    • G09G2310/0227—Details of interlacing related to multiple interlacing, i.e. involving more fields than just one odd field and one even field
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/04—Partial updating of the display screen

Abstract

A liquid crystal display (10a) including driver circuitry which applies a series of voltage pulses at a frequency of approximately 60 Hz to cumulatively change a reflectance state of a pixel in the array (25) of pixels at a near video updating rate. The display includes a near video rate updating portion (10a), while the remainder of the display has a slower updating frequency or rate. The display is comprised of a bistable cholesteric liquid crystal material (50) sandwiched between an electrode array having a plurality of row (550 a-d) and column electrodes (601 a-f). In one operating embodiment, the driver circuitry (600) generates a unipolar row and column waveforms (700), the row waveforms being applied to the row electrodes and the column waveforms being applied to the column electrodes of the near video rate updating portion.
PCT/US1998/010207 1997-06-04 1998-05-19 Cumulative drive scheme and method for a liquid crystal display WO1998055987A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU77968/98A AU7796898A (en) 1997-06-04 1998-05-19 Cumulative drive scheme and method for a liquid crystal display
EP98926044A EP0998737A4 (en) 1997-06-04 1998-05-19 Cumulative drive scheme and method for a liquid crystal display
JP50248499A JP3736645B2 (en) 1997-06-04 1998-05-19 Cumulative drive system and method for liquid crystal displays
KR1019997011438A KR100719274B1 (en) 1997-06-04 1998-05-19 Cumulative drive scheme and method for a liquid crystal display

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/868,709 US6133895A (en) 1997-06-04 1997-06-04 Cumulative drive scheme and method for a liquid crystal display
US08/868,709 1997-06-04

Publications (2)

Publication Number Publication Date
WO1998055987A2 WO1998055987A2 (en) 1998-12-10
WO1998055987A3 true WO1998055987A3 (en) 1999-04-01

Family

ID=25352182

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/010207 WO1998055987A2 (en) 1997-06-04 1998-05-19 Cumulative drive scheme and method for a liquid crystal display

Country Status (7)

Country Link
US (1) US6133895A (en)
EP (1) EP0998737A4 (en)
JP (1) JP3736645B2 (en)
KR (1) KR100719274B1 (en)
AU (1) AU7796898A (en)
TW (1) TW394921B (en)
WO (1) WO1998055987A2 (en)

Families Citing this family (62)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3423193B2 (en) * 1997-06-30 2003-07-07 三洋電機株式会社 LCD drive circuit
US6204835B1 (en) * 1998-05-12 2001-03-20 Kent State University Cumulative two phase drive scheme for bistable cholesteric reflective displays
US6940496B1 (en) * 1998-06-04 2005-09-06 Silicon, Image, Inc. Display module driving system and digital to analog converter for driving display
US6429836B1 (en) * 1999-03-30 2002-08-06 Candescent Intellectual Property Services, Inc. Circuit and method for display of interlaced and non-interlaced video information on a flat panel display apparatus
US6888522B1 (en) 1999-03-31 2005-05-03 Minolta Co., Ltd. Information display apparatus
US6518944B1 (en) * 1999-10-25 2003-02-11 Kent Displays, Inc. Combined cholesteric liquid crystal display and solar cell assembly device
EP1166258A1 (en) * 2000-01-31 2002-01-02 Three-Five Systems, Inc. Methods and apparatus for driving a display
US6770394B2 (en) * 2000-02-11 2004-08-03 The Texas A&M University System Fuel cell with monolithic flow field-bipolar plate assembly and method for making and cooling a fuel cell stack
US6954195B2 (en) * 2000-03-01 2005-10-11 Minolta Co., Ltd. Liquid crystal display device having a liquid crystal display driven by interlace scanning and/or sequential scanning
US6816138B2 (en) * 2000-04-27 2004-11-09 Manning Ventures, Inc. Graphic controller for active matrix addressed bistable reflective cholesteric displays
US6850217B2 (en) 2000-04-27 2005-02-01 Manning Ventures, Inc. Operating method for active matrix addressed bistable reflective cholesteric displays
US6819310B2 (en) 2000-04-27 2004-11-16 Manning Ventures, Inc. Active matrix addressed bistable reflective cholesteric displays
US6710760B1 (en) * 2000-11-28 2004-03-23 Eastman Kodak Company Unipolar drive for cholesteric liquid crystal displays
US7023409B2 (en) * 2001-02-09 2006-04-04 Kent Displays, Incorporated Drive schemes for gray scale bistable cholesteric reflective displays utilizing variable frequency pulses
JP3606830B2 (en) * 2001-11-02 2005-01-05 株式会社ジーニック Cholesteric LCD driver
KR100509757B1 (en) * 2001-11-23 2005-08-25 엘지전자 주식회사 Metal Insulator Metal Field Emission Display and Driving Method Thereof
JP3891018B2 (en) 2002-02-18 2007-03-07 コニカミノルタホールディングス株式会社 Method for driving liquid crystal display element, driving device and liquid crystal display device
TW200401915A (en) * 2002-07-26 2004-02-01 Varintelligent Bvi Ltd High contrast black-and-white chiral nematic displays
KR100914749B1 (en) * 2002-12-31 2009-08-31 엘지디스플레이 주식회사 Reflective liquid crystal display device including driving circuit
US6885357B2 (en) * 2002-12-31 2005-04-26 Eastman Kodak Company Method for writing pixels in a cholesteric liquid crystal display
US6911965B2 (en) * 2003-01-28 2005-06-28 Kent Displays Incorporated Waveform sequencing method and apparatus for a bistable cholesteric liquid crystal display
FR2851683B1 (en) * 2003-02-20 2006-04-28 Nemoptic IMPROVED BISTABLE NEMATIC LIQUID CRYSTAL DISPLAY DEVICE AND METHOD
US7773064B2 (en) * 2003-07-02 2010-08-10 Kent Displays Incorporated Liquid crystal display films
US7236151B2 (en) 2004-01-28 2007-06-26 Kent Displays Incorporated Liquid crystal display
WO2005081779A2 (en) * 2004-02-19 2005-09-09 Kent Displays Incorporated Staked display with shared electrode addressing
US7190337B2 (en) * 2003-07-02 2007-03-13 Kent Displays Incorporated Multi-configuration display driver
US7663597B2 (en) * 2003-07-16 2010-02-16 Honeywood Technologies, Llc LCD plateau power conservation
CN100362556C (en) * 2004-01-18 2008-01-16 奇景光电股份有限公司 Driving method for cholester type liquid crystal display device
US8199086B2 (en) * 2004-01-28 2012-06-12 Kent Displays Incorporated Stacked color photodisplay
CN1914031B (en) * 2004-01-28 2011-11-16 肯特显示器公司 Drapable liquid crystal transfer display films
US20100157180A1 (en) * 2004-01-28 2010-06-24 Kent Displays Incorporated Liquid crystal display
US7479940B2 (en) * 2004-11-12 2009-01-20 Kent Displays Incorporated Display device with electrical zipper interconnect
JP4633789B2 (en) * 2005-03-28 2011-02-16 富士通株式会社 Driving method of liquid crystal display element
US7564528B2 (en) * 2005-05-20 2009-07-21 Industrial Technology Research Institute Conductive layer to reduce drive voltage in displays
US7999832B2 (en) * 2005-05-20 2011-08-16 Industrial Technology Research Institute Controlled gap states for liquid crystal displays
GB0512829D0 (en) * 2005-06-23 2005-08-03 Magink Display Technologies Video drive scheme for a cholesteric liquid crystal display device
US7791700B2 (en) * 2005-09-16 2010-09-07 Kent Displays Incorporated Liquid crystal display on a printed circuit board
US7843411B2 (en) * 2006-01-18 2010-11-30 Manning Ventures, Inc. Remote cholesteric display
US8004740B2 (en) 2006-11-09 2011-08-23 International Business Machines Corporation Device and system for reflective digital light processing (DLP)
JP5034646B2 (en) * 2007-04-20 2012-09-26 富士通株式会社 Liquid crystal display element, driving method thereof, and electronic paper including the same
US8310630B2 (en) 2008-05-16 2012-11-13 Manning Ventures, Inc. Electronic skin having uniform gray scale reflectivity
US8269801B2 (en) * 2008-09-24 2012-09-18 3M Innovative Properties Company Unipolar gray scale drive scheme for cholesteric liquid crystal displays
EP2178079B1 (en) * 2008-10-15 2014-07-30 France Brevets Energy-saving method for marking an area of a liquid-crystal display
US20100141689A1 (en) * 2008-12-04 2010-06-10 Kent Displays, Inc. Electronic skin reader
US20100156878A1 (en) * 2008-12-18 2010-06-24 Industrial Technology Research Institute Systems for driving displays
US8176924B2 (en) * 2009-03-11 2012-05-15 Kent Displays Incorporated Color changing artificial fingernails
US8760415B2 (en) * 2009-03-30 2014-06-24 Kent Displays Incorporated Display with overlayed electronic skin
US8501093B2 (en) * 2009-06-11 2013-08-06 Roche Diagnostics Operations, Inc. Portable handheld medical diagnostic devices with color-changing indicatior
US8217930B2 (en) * 2009-08-27 2012-07-10 3M Innovative Properties Company Fast transitions of large area cholesteric displays
TW201217860A (en) 2010-10-25 2012-05-01 Ind Tech Res Inst Cholesteric liquid crystal device
TW201222520A (en) * 2010-11-30 2012-06-01 Chunghwa Picture Tubes Ltd Method for driving cholesteric liquid crystal display device
CN102013243A (en) * 2010-12-28 2011-04-13 华映视讯（吴江）有限公司 Method for driving cholesterol liquid crystal display device
GB201111123D0 (en) * 2011-06-29 2011-08-10 R2Tek Llc Drive scheme for cholesteric liquid crystal display device
US9651813B2 (en) 2011-09-16 2017-05-16 Kent Displays Inc. Liquid crystal paper
US9116379B2 (en) 2012-05-22 2015-08-25 Kent Displays Incorporated Electronic display with semitransparent back layer
US9235075B2 (en) 2012-05-22 2016-01-12 Kent Displays Incorporated Electronic display with patterned layer
US8958048B2 (en) 2012-07-16 2015-02-17 Kent Displays Incorporated Multi-functional gasket for electrooptical display
US9229259B2 (en) 2013-05-17 2016-01-05 Kent Displays Incorporated Cholesteric writing board display device
DE202013104683U1 (en) 2013-10-16 2013-10-28 Po-Kang Wang Hubcap with a locking arrangement
US9851612B2 (en) 2014-04-02 2017-12-26 Kent Displays Inc. Liquid crystal display with identifiers
CN106611579A (en) * 2015-10-22 2017-05-03 小米科技有限责任公司 A content display method and apparatus
WO2018049294A1 (en) * 2016-09-09 2018-03-15 Kent State University Bistable cholesteric liquid crystal switchable window

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4419664A (en) * 1980-01-16 1983-12-06 International Standard Electric Corporation Co-ordinate addressing of smectic display cells
US5488499A (en) * 1992-07-16 1996-01-30 Seiko Epson Corporation Liquid crystal display device utilizing a chiral nematic liquid crystal medium operative relative to two metastable states

Family Cites Families (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5576393A (en) * 1978-12-04 1980-06-09 Hitachi Ltd Matrix drive method for guestthostttype phase transfer liquid crystal
DE3113041A1 (en) * 1980-04-01 1982-01-28 Canon K.K., Tokyo METHOD AND DEVICE FOR DISPLAYING INFORMATION
US4514045A (en) * 1981-06-22 1985-04-30 Minnesota Mining And Manufacturing Company Helichromic-smectic liquid crystal compositions and display cells
GB2139392B (en) * 1983-05-05 1986-10-22 Standard Telephones Cables Ltd Display device
US4641135A (en) * 1983-12-27 1987-02-03 Ncr Corporation Field effect display system with diode selection of picture elements
US4636788A (en) * 1984-01-19 1987-01-13 Ncr Corporation Field effect display system using drive circuits
US4668049A (en) * 1984-12-18 1987-05-26 Itt Corporation Illumination for a scattering type liquid crystal display
US5168380A (en) * 1985-03-01 1992-12-01 Manchester R & D Partnership An Ohio Limited Partnership Multiple containment mediums of operationally nematic liquid crystal responsive to a prescribed input
GB2173336B (en) * 1985-04-03 1988-04-27 Stc Plc Addressing liquid crystal cells
GB2178581B (en) * 1985-07-12 1989-07-19 Canon Kk Liquid crystal apparatus and driving method therefor
JPH0756542B2 (en) * 1985-09-25 1995-06-14 カシオ計算機株式会社 LCD drive circuit
GB2173629B (en) * 1986-04-01 1989-11-15 Stc Plc Addressing liquid crystal cells
US4728175A (en) * 1986-10-09 1988-03-01 Ovonic Imaging Systems, Inc. Liquid crystal display having pixels with auxiliary capacitance
US5189535A (en) * 1986-12-11 1993-02-23 Fujitsu Limited Liquid crystal display element and method for driving same
US5285214A (en) * 1987-08-12 1994-02-08 The General Electric Company, P.L.C. Apparatus and method for driving a ferroelectric liquid crystal device
US4864538A (en) * 1988-05-05 1989-09-05 Tektronix, Inc. Method and apparatus for addressing optical data storage locations
US5036317A (en) * 1988-08-22 1991-07-30 Tektronix, Inc. Flat panel apparatus for addressing optical data storage locations
JP2549433B2 (en) * 1989-03-13 1996-10-30 株式会社日立製作所 Electro-optical modulator driving method and printer
US5289175A (en) * 1989-04-03 1994-02-22 Canon Kabushiki Kaisha Method of and apparatus for driving ferroelectric liquid crystal display device
GB2249653B (en) * 1990-10-01 1994-09-07 Marconi Gec Ltd Ferroelectric liquid crystal devices
KR960002202B1 (en) * 1991-02-04 1996-02-13 가부시끼가이샤 한도다이 에네르기 겐뀨쇼 Method of manufacturing liquid crystal electro-optical devices
ATE178645T1 (en) * 1991-05-02 1999-04-15 Univ Kent State Ohio LIQUID CRYSTAL LIGHT MODULATING DEVICE AND MATERIAL
US5453863A (en) * 1991-05-02 1995-09-26 Kent State University Multistable chiral nematic displays
US5280280A (en) * 1991-05-24 1994-01-18 Robert Hotto DC integrating display driver employing pixel status memories
US5132823A (en) * 1991-08-30 1992-07-21 Raychem Corporation Multipurpose liquid crystal display having means for removably positioning the retroreflector
GB9202693D0 (en) * 1992-02-08 1992-03-25 Philips Electronics Uk Ltd A method of manufacturing a large area active matrix array
US5168378A (en) * 1992-02-10 1992-12-01 Reliant Laser Corporation Mirror with dazzle light attenuation zone
EP0641372B1 (en) * 1992-05-18 1999-04-21 Kent State University Liquid crystalline light modulating device & material
US5251048A (en) * 1992-05-18 1993-10-05 Kent State University Method and apparatus for electronic switching of a reflective color display
US5293261A (en) * 1992-12-31 1994-03-08 The United States Of America As Represented By The Secretary Of The Navy Device for low electric-field induced switching of Langmuir-Blodgett ferroelecric liquid crystal polymer films
GB9302997D0 (en) * 1993-02-15 1993-03-31 Secr Defence Multiplex addressing of ferro-electric liquid crystal displays
US5477358A (en) * 1993-06-21 1995-12-19 Case Western Reserve University Chiral nematic liquid crystal display with homeotropic alignment and negative dielectric anisotropy
US5625477A (en) * 1994-04-11 1997-04-29 Advanced Display Systems, Inc. Zero field multistable cholesteric liquid crystal displays
US5644330A (en) * 1994-08-11 1997-07-01 Kent Displays, Inc. Driving method for polymer stabilized and polymer free liquid crystal displays
US5717418A (en) * 1994-08-30 1998-02-10 Proxima Corporation Ferroelectric liquid crystal display apparatus and method of making it
US5748277A (en) * 1995-02-17 1998-05-05 Kent State University Dynamic drive method and apparatus for a bistable liquid crystal display
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4419664A (en) * 1980-01-16 1983-12-06 International Standard Electric Corporation Co-ordinate addressing of smectic display cells
US5488499A (en) * 1992-07-16 1996-01-30 Seiko Epson Corporation Liquid crystal display device utilizing a chiral nematic liquid crystal medium operative relative to two metastable states

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0998737A4 *

Also Published As

Publication number Publication date
EP0998737A2 (en) 2000-05-10
WO1998055987A2 (en) 1998-12-10
KR20010013437A (en) 2001-02-26
AU7796898A (en) 1998-12-21
US6133895A (en) 2000-10-17
JP2001506379A (en) 2001-05-15
JP3736645B2 (en) 2006-01-18
KR100719274B1 (en) 2007-05-18
TW394921B (en) 2000-06-21
EP0998737A4 (en) 2003-01-08

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