GB1512702A - Liquid crystal display device - Google Patents

Liquid crystal display device

Info

Publication number
GB1512702A
GB1512702A GB696875A GB696875A GB1512702A GB 1512702 A GB1512702 A GB 1512702A GB 696875 A GB696875 A GB 696875A GB 696875 A GB696875 A GB 696875A GB 1512702 A GB1512702 A GB 1512702A
Authority
GB
United Kingdom
Prior art keywords
pair
electrodes
cell
inter
liquid crystal
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.)
Expired
Application number
GB696875A
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.)
Rank Organization Ltd
Original Assignee
Rank Organization Ltd
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 Rank Organization Ltd filed Critical Rank Organization Ltd
Priority to GB696875A priority Critical patent/GB1512702A/en
Publication of GB1512702A publication Critical patent/GB1512702A/en
Expired 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
    • G02F1/1313—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 specially adapted for a particular application
    • 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
    • G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal 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
    • G02F1/139—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 orientation effects in which the liquid crystal remains transparent
    • G02F1/1396—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 orientation effects in which the liquid crystal remains transparent the liquid crystal being selectively controlled between a twisted state and a non-twisted state, e.g. TN-LC cell

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Liquid Crystal (AREA)

Abstract

1512702 Controlling light RANK ORGANISATION Ltd 11 Dec 1975 [19 Feb 1975] 6968/75 Heading G2F [Also in Divisions G5 and H4] A pair of inter-digitated electrodes is provided on each of two parallel opposed walls of a nematic liquid crystal cell whereby fields can be applied parallel to each wall to promote homogeneous alignment or, by connecting each pair of electrodes in common, a field can be applied perpendicular to the wall to promote homotropic alignment. The electrode fingers of one pair are inclined, e.g. at 90 degrees, to those of the other pair so that the resulting homogeneous alignments are nonparallel, giving a twisted nematic structure with optical rotary power. Such a cell disposed together with a retardation plate between polarizers provides a switchable colour filter e.g. for use with a monochrome cathode ray tube for a frame sequential colour display, but switching time must be less than frame flyback time. Selective switching of different areas of the cell is effected by using a plurality of pairs of inter-digitated electrodes, for example to provide a number of bands and to reduce the required switching speed in the abovementioned colour display, or to provide a coincidence addressed X-Y matrix or alphanumeric display device.
GB696875A 1975-12-11 1975-12-11 Liquid crystal display device Expired GB1512702A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB696875A GB1512702A (en) 1975-12-11 1975-12-11 Liquid crystal display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB696875A GB1512702A (en) 1975-12-11 1975-12-11 Liquid crystal display device

Publications (1)

Publication Number Publication Date
GB1512702A true GB1512702A (en) 1978-06-01

Family

ID=9824132

Family Applications (1)

Application Number Title Priority Date Filing Date
GB696875A Expired GB1512702A (en) 1975-12-11 1975-12-11 Liquid crystal display device

Country Status (1)

Country Link
GB (1) GB1512702A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119110A (en) * 1979-05-29 1983-11-09 Texas Instruments Inc Liquid crystal display cell
EP0248698A1 (en) * 1986-05-14 1987-12-09 Etablissement Public dit: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS) Optical liquid-crystal devices allowing high-frequency excitations

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2119110A (en) * 1979-05-29 1983-11-09 Texas Instruments Inc Liquid crystal display cell
EP0248698A1 (en) * 1986-05-14 1987-12-09 Etablissement Public dit: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS) Optical liquid-crystal devices allowing high-frequency excitations

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee