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FR2341148A1 - Forming homogeneously orientated liq. crystal films - by applying to the confining substrate an orienting surfactant e.g. a polyvinyl alcohol deriv. - Google Patents

Forming homogeneously orientated liq. crystal films - by applying to the confining substrate an orienting surfactant e.g. a polyvinyl alcohol deriv.

Info

Publication number
FR2341148A1
FR2341148A1 FR7603623A FR7603623A FR2341148A1 FR 2341148 A1 FR2341148 A1 FR 2341148A1 FR 7603623 A FR7603623 A FR 7603623A FR 7603623 A FR7603623 A FR 7603623A FR 2341148 A1 FR2341148 A1 FR 2341148A1
Authority
FR
France
Prior art keywords
liq
surfactant
polyvinyl alcohol
plates
orienting
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
FR7603623A
Other languages
French (fr)
Other versions
FR2341148B1 (en
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7603623A priority Critical patent/FR2341148A1/en
Publication of FR2341148A1 publication Critical patent/FR2341148A1/en
Application granted granted Critical
Publication of FR2341148B1 publication Critical patent/FR2341148B1/fr
Granted 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
    • G02F1/133—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
    • G02F1/133711—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films
    • G02F1/133719—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films with coupling agent molecules, e.g. silane

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)

Abstract

A homogeneously orientated film of a nematic liq. crystal (I), confined between 2 plates, is formed by the influence on the molecules of (I), of an orientating matrix applied to the surface of the plates. The matrix consists of 1 monomolecular layer of surfactant (II) which, before application to the plaes, is formed at a liq. -gas phase boundary and after application, is thermally treated at 80-180 degrees C. (II) are esp. of formula RX(CH2)1Y (IIa) or are polyvinyl alcohol derivs. of formula:-(choh.ch2)n'- (CH2OX'.CH2)m' (IIb) (R = CnH(2n+2k-m)Zm. n = 12-37. 0 m 2n. -3 k 1.Z = F, Cl or Br. X = CH2, CO, O, S, CH=CH, or > C=CH2. 1 = 0-5. Y = OH, COOH, COOCH=CH2, OCO.CH=CH2, OCO.C(CH3)=CH2 or, provided n 18, also SO3H, PO3H2 or Si(OCH3)3. 20 m' n' = 20-10000. X' = COCH3, COCF3, benzoyl, cinnamoyl, CH3, C2H5, allyl, 2,3-epoxypropyl). Both homotropic (using (IIa)) or homogeneous (using (IIb)) orientations can be achieved over a wide temp. range which improves the characteristic voltage-contrast curve of teh cell and reduces its relaxation time. The matrix tends to 'smooth out' any irregularities in the surface of the plates.
FR7603623A 1976-02-10 1976-02-10 Forming homogeneously orientated liq. crystal films - by applying to the confining substrate an orienting surfactant e.g. a polyvinyl alcohol deriv. Granted FR2341148A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7603623A FR2341148A1 (en) 1976-02-10 1976-02-10 Forming homogeneously orientated liq. crystal films - by applying to the confining substrate an orienting surfactant e.g. a polyvinyl alcohol deriv.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7603623A FR2341148A1 (en) 1976-02-10 1976-02-10 Forming homogeneously orientated liq. crystal films - by applying to the confining substrate an orienting surfactant e.g. a polyvinyl alcohol deriv.

Publications (2)

Publication Number Publication Date
FR2341148A1 true FR2341148A1 (en) 1977-09-09
FR2341148B1 FR2341148B1 (en) 1978-12-08

Family

ID=9168955

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7603623A Granted FR2341148A1 (en) 1976-02-10 1976-02-10 Forming homogeneously orientated liq. crystal films - by applying to the confining substrate an orienting surfactant e.g. a polyvinyl alcohol deriv.

Country Status (1)

Country Link
FR (1) FR2341148A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0301660A1 (en) * 1987-07-23 1989-02-01 Koninklijke Philips Electronics N.V. Display cell

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2312662A1 (en) * 1972-03-15 1973-10-04 Hitachi Ltd Electro optical arrangement - with orientated liq crystals
FR2218575A1 (en) * 1973-02-17 1974-09-13 Asahi Optical Co Ltd Nematic liq. crystal cell - having transparent electrodes coated by a film contg. gps orientated by friction

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2312662A1 (en) * 1972-03-15 1973-10-04 Hitachi Ltd Electro optical arrangement - with orientated liq crystals
FR2218575A1 (en) * 1973-02-17 1974-09-13 Asahi Optical Co Ltd Nematic liq. crystal cell - having transparent electrodes coated by a film contg. gps orientated by friction

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0301660A1 (en) * 1987-07-23 1989-02-01 Koninklijke Philips Electronics N.V. Display cell

Also Published As

Publication number Publication date
FR2341148B1 (en) 1978-12-08

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