EP0120732A1 - Verfahren zur sequentiellen Steuerung einer Flüssigkristall-Matrixanzeigeeinrichtung unter Benutzung des cholesterisch-nematischen Phasenübergangs - Google Patents

Verfahren zur sequentiellen Steuerung einer Flüssigkristall-Matrixanzeigeeinrichtung unter Benutzung des cholesterisch-nematischen Phasenübergangs Download PDF

Info

Publication number
EP0120732A1
EP0120732A1 EP84400320A EP84400320A EP0120732A1 EP 0120732 A1 EP0120732 A1 EP 0120732A1 EP 84400320 A EP84400320 A EP 84400320A EP 84400320 A EP84400320 A EP 84400320A EP 0120732 A1 EP0120732 A1 EP 0120732A1
Authority
EP
European Patent Office
Prior art keywords
potential
liquid crystal
threshold voltage
control method
column
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
EP84400320A
Other languages
English (en)
French (fr)
Other versions
EP0120732B1 (de
Inventor
Jean Frédéric Clerc
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
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 Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of EP0120732A1 publication Critical patent/EP0120732A1/de
Application granted granted Critical
Publication of EP0120732B1 publication Critical patent/EP0120732B1/de
Expired legal-status Critical Current

Links

Images

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
    • 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
    • G09G2310/06—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

Definitions

  • the invention relates to the control of a matrix imager comprising a display cell constituted by two transparent insulating walls and by a liquid crystal comprising zones distributed in a matrix and interspersed in a system known as crossed bands or in English terminology. Saxon in a "cross bar" system.
  • the response curves of the zone x i y j of the liquid crystal have been represented as a function of the previous sensitizations. These curves give the light intensity transmitted (I) by the liquid crystal zone as a function of time.
  • the rising part 30 of the two curves 0 and P corresponds to the change of cholesteric-nematic phase of the liquid crystal (passage from the cholesteric phase to the nematic phase), this phase change taking place during the erasure period t 1 . It should be noted that the time to obtain this phase transition being relatively long, it is necessary to carry out the latter during the erasing period t 1 of the line x i .
  • the columns of the imager not selected are brought to a zero continuous potential, for example the potential of the mass.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal (AREA)
  • Liquid Crystal Display Device Control (AREA)
EP84400320A 1983-02-24 1984-02-16 Verfahren zur sequentiellen Steuerung einer Flüssigkristall-Matrixanzeigeeinrichtung unter Benutzung des cholesterisch-nematischen Phasenübergangs Expired EP0120732B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8303047 1983-02-24
FR8303047A FR2541807B1 (fr) 1983-02-24 1983-02-24 Procede de commande sequentielle d'un imageur matriciel utilisant l'effet de transition de phase cholesterique-nematique d'un cristal liquide

Publications (2)

Publication Number Publication Date
EP0120732A1 true EP0120732A1 (de) 1984-10-03
EP0120732B1 EP0120732B1 (de) 1987-06-03

Family

ID=9286230

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84400320A Expired EP0120732B1 (de) 1983-02-24 1984-02-16 Verfahren zur sequentiellen Steuerung einer Flüssigkristall-Matrixanzeigeeinrichtung unter Benutzung des cholesterisch-nematischen Phasenübergangs

Country Status (6)

Country Link
US (1) US4625204A (de)
EP (1) EP0120732B1 (de)
JP (1) JPS59164597A (de)
CA (1) CA1231187A (de)
DE (1) DE3464098D1 (de)
FR (1) FR2541807B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0197742A3 (en) * 1985-04-03 1989-03-01 International Standard Electric Corporation Addressing liquid crystal cells
EP0196905A3 (de) * 1985-04-03 1989-10-18 Nortel Networks Corporation Flüssigkristall-Zellenadressierung

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2558606B1 (fr) * 1984-01-23 1993-11-05 Canon Kk Procede de commande d'un dispositif de modulation optique et dispositif de modulation optique pour sa mise en oeuvre
US5757350A (en) * 1984-01-23 1998-05-26 Canon Kabushiki Kaisha Driving method for optical modulation device
US5296953A (en) * 1984-01-23 1994-03-22 Canon Kabushiki Kaisha Driving method for ferro-electric liquid crystal optical modulation device
JPS61156229A (ja) * 1984-12-28 1986-07-15 Canon Inc 液晶装置
SE8504760D0 (sv) * 1985-10-14 1985-10-14 Sven Torbjorn Lagerwall Electronic addressing of ferroelectric liquid crystal devices
US5255110A (en) * 1985-12-25 1993-10-19 Canon Kabushiki Kaisha Driving method for optical modulation device using ferroelectric liquid crystal
GB2185614B (en) * 1985-12-25 1990-04-18 Canon Kk Optical modulation device
GB2207272B (en) * 1987-07-18 1991-08-14 Stc Plc Addressing liquid crystal cells
GB8726996D0 (en) * 1987-11-18 1987-12-23 Secr Defence Multiplex addressing of ferro-electric liquid crystal displays
FR2627308B1 (fr) * 1988-02-15 1990-06-01 Commissariat Energie Atomique Procede de commande d'un ecran d'affichage matriciel permettant d'ajuster son contraste et dispositif pour la mise en oeuvre de ce procede
US5424753A (en) * 1990-12-31 1995-06-13 Casio Computer Co., Ltd. Method of driving liquid-crystal display elements
JPH05127616A (ja) * 1991-10-31 1993-05-25 Canon Inc 電気光学表示装置および電気光学素子駆動装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4041481A (en) * 1974-10-05 1977-08-09 Matsushita Electric Industrial Co., Ltd. Scanning apparatus for an electrophoretic matrix display panel
GB2004679A (en) * 1977-09-26 1979-04-04 Secr Defence Liquid crystal matrix display

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1502280A (en) * 1974-12-11 1978-03-01 Secr Defence Liquid crystal displays
JPS53995A (en) * 1976-06-25 1978-01-07 Toshiba Corp Driving system for matrix of storage type liquid crystal element
JPS5476095A (en) * 1977-11-30 1979-06-18 Toshiba Corp Matrix drive system of storage type liquid crystal element
US4380008A (en) * 1978-09-29 1983-04-12 Hitachi, Ltd. Method of driving a matrix type phase transition liquid crystal display device to obtain a holding effect and improved response time for the erasing operation
JPS5576393A (en) * 1978-12-04 1980-06-09 Hitachi Ltd Matrix drive method for guestthostttype phase transfer liquid crystal
US4529271A (en) * 1982-03-12 1985-07-16 At&T Bell Laboratories Matrix addressed bistable liquid crystal display
JPH0629919B2 (ja) * 1982-04-16 1994-04-20 株式会社日立製作所 液晶素子の駆動方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4041481A (en) * 1974-10-05 1977-08-09 Matsushita Electric Industrial Co., Ltd. Scanning apparatus for an electrophoretic matrix display panel
GB2004679A (en) * 1977-09-26 1979-04-04 Secr Defence Liquid crystal matrix display

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IEEE JOURNAL OF SOLID-STATE CIRCUITS, vol. SC-13, no. 1, février 1978, pages 98-100, IEEE, New York, US K.-H. WALTER et al.: "Pulse-length modulation achieves two-phase writing in matrix-addressed liquid-crystal information displays" *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0197742A3 (en) * 1985-04-03 1989-03-01 International Standard Electric Corporation Addressing liquid crystal cells
EP0196905A3 (de) * 1985-04-03 1989-10-18 Nortel Networks Corporation Flüssigkristall-Zellenadressierung

Also Published As

Publication number Publication date
US4625204A (en) 1986-11-25
CA1231187A (en) 1988-01-05
FR2541807A1 (fr) 1984-08-31
FR2541807B1 (fr) 1985-06-07
EP0120732B1 (de) 1987-06-03
DE3464098D1 (en) 1987-07-09
JPS59164597A (ja) 1984-09-17

Similar Documents

Publication Publication Date Title
EP0120732B1 (de) Verfahren zur sequentiellen Steuerung einer Flüssigkristall-Matrixanzeigeeinrichtung unter Benutzung des cholesterisch-nematischen Phasenübergangs
FR2569294A1 (fr) Panneau d'affichage et son procede de commande
FR2581209A1 (fr) Dispositif optique a cristal liquide
EP0051521B1 (de) Verfahren zum Steuern einer optischen Charakteristik eines Materials
US5636044A (en) Segmented polymer stabilized and polymer free cholesteric texture liquid crystal displays and driving method for same
FR2558606A1 (fr) Procede de commande d'un dispositif de modulation optique et dispositif de modulation optique pour sa mise en oeuvre
FR2544884A1 (fr) Procede de commande d'un dispositif de modulation optique
KR20000069992A (ko) 초기에는 네마틱 상태로 설정된 콜레스테릭 액정 평판 디스플레이의 구동장치 및 구동방법
FR2553218A1 (fr) Ecran d'affichage a matrice active sans croisement des lignes et des colonnes d'adressage
FR2571526A1 (fr) Panneau d'affichage et son procede de commande
EP0055966B1 (de) Matrixanzeigevorrichtung mit zwei Arten von Linienelektroden und Verfahren zu ihrer Ansteuerung
EP0535127B1 (de) Nematische flüssigkristallanzeige mit oberflächeninduzierter bistabilität und steuerung durch den flexoelektrischen effekt
EP0058593A1 (de) Matrixanzeigevorrichtung mit verschiedenen Arten von Elektroden und Verfahren zu ihrer Ansteuerung
EP0114013A1 (de) Temperaturregelungssystem für eine thermisch erregte Einrichtung
FR2669759A1 (fr) Ecran plat a matrice active.
FR2656757A1 (fr) Procede d'adressage de chaque colonne d'un ecran lcd de type matriciel.
FR2490852A1 (fr) Systeme d'attaque pour un dispositif d'affichage a cristaux liquides a matrice d'elements actifs
EP0238405B1 (de) Verfahren zur sequentiellen Steuerung eines Flüssigkristallanzeigematrixgeräts mit verschiedenen optischen Ansprechgeschwindigkeiten bei Wechsel- und Gleichfeldern
EP0105767B1 (de) Verfahren zum Steuern einer Matrixanzeigeeinrichtung
EP0237539B1 (de) Anlage zur steuerung einer matrixanzeigetafel mit integriertem speicher und verfahren zu deren steuerung
JPH07502605A (ja) 強誘電体液晶ディスプレイ装置
WO2011095403A1 (fr) Procede d'ecriture d'image dans un afficheur a cristal liquide
FR2584521A1 (fr) Dispositif d'affichage electro-optique a cristal liquide
FR2916295A1 (fr) Procede d'adressage d'un ecran matriciel a cristal liquide et dispositif appliquant ce procede
EP0113414A2 (de) Matrixgesteuerte smektische Flüssigkristallanzeigevorrichtung

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): CH DE GB IT LI NL SE

17P Request for examination filed

Effective date: 19850308

17Q First examination report despatched

Effective date: 19860813

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE GB IT LI NL SE

REF Corresponds to:

Ref document number: 3464098

Country of ref document: DE

Date of ref document: 19870709

ITF It: translation for a ep patent filed
RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: COMMISSARIAT A L'ENERGIE ATOMIQUE

NLT2 Nl: modifications (of names), taken from the european patent patent bulletin

Owner name: COMMISSARIAT A L'ENERGIE ATOMIQUE TE PARIJS, FRANK

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19910124

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19910130

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19910213

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19910214

Year of fee payment: 8

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19910228

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19920216

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19920217

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19920229

Ref country code: CH

Effective date: 19920229

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19920901

GBPC Gb: european patent ceased through non-payment of renewal fee
NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19921103

EUG Se: european patent has lapsed

Ref document number: 84400320.2

Effective date: 19920904