GB2262831A - Multiplex addressing of ferro-electric liquid crystal displays - Google Patents

Multiplex addressing of ferro-electric liquid crystal displays

Info

Publication number
GB2262831A
GB2262831A GB9301627A GB9301627A GB2262831A GB 2262831 A GB2262831 A GB 2262831A GB 9301627 A GB9301627 A GB 9301627A GB 9301627 A GB9301627 A GB 9301627A GB 2262831 A GB2262831 A GB 2262831A
Authority
GB
United Kingdom
Prior art keywords
strobe
addressing
waveform
row
ferro
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
GB9301627A
Other versions
GB9301627D0 (en
GB2262831B (en
Inventor
Jonathan Rennie Hughes
Edward Peter Raynes
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
Application filed by UK Secretary of State for Defence filed Critical UK Secretary of State for Defence
Publication of GB9301627D0 publication Critical patent/GB9301627D0/en
Publication of GB2262831A publication Critical patent/GB2262831A/en
Application granted granted Critical
Publication of GB2262831B publication Critical patent/GB2262831B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0202—Addressing of scan or signal lines
    • G09G2310/0205—Simultaneous scanning of several lines in flat panels
    • 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
    • G09G2310/06—Details of flat display driving waveforms
    • 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
    • G09G2310/06—Details of flat display driving waveforms
    • G09G2310/061—Details of flat display driving waveforms for resetting or blanking
    • G09G2310/063—Waveforms for resetting the whole screen at once
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/041—Temperature compensation

Abstract

A ferro-electric crystal cell is addressed by row and column electrodes forming an x,y matrix of display elements. A strobe waveform is applied to each row in sequence whilst appropriate data waveforms are applied to all the column electrodes. At each display element the material receives an addressing waveform to switch it to one of its two switched states depending upon the polarity of the addressing waveform. The switching characteristics of ferro-electric materials depend upon the shape of the addressing waveform. Two different shapes of addressing waveforms are used to produce two different and separated switching characteristics (Fig. 3). At least one switching characteristic curve may exhibit a minimum response time at one voltage value, and the display is operated at voltages above this. The data waveforms are alternating positive and negative pulses of period 2ts. The strobe waveform has a zero for one time period ts followed by a unipolar voltage pulse of duration greater than ts, e.g. 1.5ts or more. This results in an overlapping of addressing in adjacent rows, i.e. the end of a strobe pulse on one row overlaps with the beginning of a strobe pulse on the next row. The display elements may be switched into one of their two states by one of two strobe pulses of opposite polarity. Alternatively a blanking pulse may switch all elements to one state and a strobe used to switch selected elements to the other state. <IMAGE>
GB9301627A 1990-08-07 1993-01-27 Multiplex addressing of ferro-electric liquid crystal displays Expired - Fee Related GB2262831B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB909017316A GB9017316D0 (en) 1990-08-07 1990-08-07 Multiplex addressing of ferro-electric liquid crystal displays
PCT/GB1991/001263 WO1992002925A1 (en) 1990-08-07 1991-07-26 Multiplex addressing of ferro-electric liquid crystal displays

Publications (3)

Publication Number Publication Date
GB9301627D0 GB9301627D0 (en) 1993-04-14
GB2262831A true GB2262831A (en) 1993-06-30
GB2262831B GB2262831B (en) 1994-06-29

Family

ID=10680305

Family Applications (2)

Application Number Title Priority Date Filing Date
GB909017316A Pending GB9017316D0 (en) 1990-08-07 1990-08-07 Multiplex addressing of ferro-electric liquid crystal displays
GB9301627A Expired - Fee Related GB2262831B (en) 1990-08-07 1993-01-27 Multiplex addressing of ferro-electric liquid crystal displays

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB909017316A Pending GB9017316D0 (en) 1990-08-07 1990-08-07 Multiplex addressing of ferro-electric liquid crystal displays

Country Status (9)

Country Link
EP (1) EP0542804B1 (en)
JP (1) JP3356430B2 (en)
KR (1) KR100231216B1 (en)
CN (1) CN1025454C (en)
CA (1) CA2088770C (en)
DE (1) DE69119771T2 (en)
GB (2) GB9017316D0 (en)
MY (1) MY108630A (en)
WO (1) WO1992002925A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5905482A (en) * 1994-04-11 1999-05-18 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Ferroelectric liquid crystal displays with digital greyscale
US6046715A (en) * 1996-05-17 2000-04-04 Sharp Kabushiki Kaisha Liquid crystal array device
US6054973A (en) * 1996-06-20 2000-04-25 Sharp Kabushiki Kaisha Matrix array bistable device addressing
GB2347258A (en) * 1999-02-24 2000-08-30 Sharp Kk Matrix array bistable devices
US6215533B1 (en) 1996-05-17 2001-04-10 Sharp Kabushiki Kaisha Ferroelectric liquid crystal driving using square wave and non-square wave signals
US6369789B1 (en) 1998-05-16 2002-04-09 Sharp Kabushiki Kaisha Reduction of ionic memory effect in ferroelectric liquid crystal material

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9302997D0 (en) * 1993-02-15 1993-03-31 Secr Defence Multiplex addressing of ferro-electric liquid crystal displays
JP2977410B2 (en) * 1993-04-26 1999-11-15 シャープ株式会社 Ferroelectric liquid crystal composition and device using the same
GB9309502D0 (en) * 1993-05-08 1993-06-23 Secr Defence Addressing ferroelectric liquid crystal displays
GB9404356D0 (en) * 1994-03-07 1994-04-20 Secr Defence Temperature compensation of ferroelectric liquid crystal displays
GB2301450B (en) * 1994-03-07 1998-01-14 Secr Defence Temperature compensation of ferro-electric liquid crystal displays
US6115021A (en) 1994-07-04 2000-09-05 Sharp Kabushiki Kaisha Method and apparatus for driving a liquid crystal panel using a ferroelectric liquid crystal material having a negative dielectric anisotropy
GB2294797A (en) * 1994-11-01 1996-05-08 Sharp Kk Method of addressing a liquid crystal display
GB9510612D0 (en) * 1995-05-25 1995-07-19 Central Research Lab Ltd Improvements in or relating to the addressing of liquid crystal displays
GB2312542B (en) * 1995-12-21 2000-02-23 Secr Defence Multiplex addressing of ferroelectric liquid crystal displays
GB9526270D0 (en) * 1995-12-21 1996-02-21 Secr Defence Multiplex addressing of ferroelectric liquid crystal displays
KR100434250B1 (en) * 2002-02-16 2004-06-04 이정열 Granule form solidification method of cultured bacteria and culture fluid have the high solubility and viability
CN102622972B (en) * 2011-01-30 2013-09-04 苏州汉朗光电有限公司 Unidirectional pulse driving method of smectic state liquid crystal display
CN102682722B (en) * 2011-03-07 2013-10-02 苏州汉朗光电有限公司 Scanning drive method for smectic phase liquid crystal display
CN102681228B (en) * 2011-03-17 2014-08-20 苏州汉朗光电有限公司 Driving method for pixel-independent-control smectic-phase liquid crystal display screens

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0197742A2 (en) * 1985-04-03 1986-10-15 Nortel Networks Corporation Addressing liquid crystal cells

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0197742A2 (en) * 1985-04-03 1986-10-15 Nortel Networks Corporation Addressing liquid crystal cells

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5905482A (en) * 1994-04-11 1999-05-18 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Ferroelectric liquid crystal displays with digital greyscale
US6046715A (en) * 1996-05-17 2000-04-04 Sharp Kabushiki Kaisha Liquid crystal array device
US6215533B1 (en) 1996-05-17 2001-04-10 Sharp Kabushiki Kaisha Ferroelectric liquid crystal driving using square wave and non-square wave signals
US6054973A (en) * 1996-06-20 2000-04-25 Sharp Kabushiki Kaisha Matrix array bistable device addressing
US6369789B1 (en) 1998-05-16 2002-04-09 Sharp Kabushiki Kaisha Reduction of ionic memory effect in ferroelectric liquid crystal material
GB2347258A (en) * 1999-02-24 2000-08-30 Sharp Kk Matrix array bistable devices
GB2347258B (en) * 1999-02-24 2002-10-16 Sharp Kk Matrix array bistable devices

Also Published As

Publication number Publication date
MY108630A (en) 1996-10-31
GB9017316D0 (en) 1990-09-19
DE69119771D1 (en) 1996-06-27
EP0542804B1 (en) 1996-05-22
CA2088770A1 (en) 1992-02-08
CN1058850A (en) 1992-02-19
WO1992002925A1 (en) 1992-02-20
GB9301627D0 (en) 1993-04-14
KR930701803A (en) 1993-06-12
CA2088770C (en) 2002-11-12
EP0542804A1 (en) 1993-05-26
DE69119771T2 (en) 1996-11-14
JP3356430B2 (en) 2002-12-16
GB2262831B (en) 1994-06-29
KR100231216B1 (en) 1999-11-15
JPH05509419A (en) 1993-12-22
CN1025454C (en) 1994-07-13

Similar Documents

Publication Publication Date Title
GB2262831A (en) Multiplex addressing of ferro-electric liquid crystal displays
JPS6448042A (en) Addressing of liquid crystal cell
US4945352A (en) Active matrix display device of the nonlinear two-terminal type
KR100233794B1 (en) Display driving deivce and its driving method
US5247376A (en) Method of driving a liquid crystal display device
EP0489459B1 (en) Method of driving a matrix display device and a matrix display device operable by such a method
JPH05714B2 (en)
GB2186414A (en) Liquid crystal display device and method of driving same
KR890008595A (en) LCD device
MY112584A (en) Temperature compensation of ferro-electric liquid crystal displays
EP0320054A2 (en) Matrix display systems
ATE148954T1 (en) LIQUID CRYSTAL DISPLAY DEVICE AND METHOD FOR CONTROLLING SAME
GB2232802A (en) Multiplex addressing of ferro-electric crystal displays
JPS5650277B2 (en)
KR890005565A (en) How to address ferroelectric liquid crystal displays
EP0171177A3 (en) Addressing smectic displays
KR20040037177A (en) Matrix addressing method and circuit, and liquid crystal display device
GB2290160A (en) Multiplex addressing of ferro-electric liquid crystal displays
WO2004075156B1 (en) Improved bistable nematic liquid crystal display method and device
KR900008307A (en) Addressing Techniques for Multiplexed Ferroelectric Liquid Crystals
MY108364A (en) Multiplex addressing of ferro-electric liquid crystal displays
JPS6473390A (en) Driving of matrix display panel
GB2077974A (en) A matrix type liquid crystal display device
GB2301450A (en) Temperature compensation of ferroelectric liquid crystal displays
KR900005167B1 (en) Selecting electrode device circuit for a matrix liquid crystal display

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: 20030726