GB1334384A - Signal display apparatus - Google Patents

Signal display apparatus

Info

Publication number
GB1334384A
GB1334384A GB1334384DA GB1334384A GB 1334384 A GB1334384 A GB 1334384A GB 1334384D A GB1334384D A GB 1334384DA GB 1334384 A GB1334384 A GB 1334384A
Authority
GB
United Kingdom
Prior art keywords
cholesteryl
liquid crystals
glass
pads
bias
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
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconi Co 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 Marconi Co Ltd filed Critical Marconi Co Ltd
Publication of GB1334384A publication Critical patent/GB1334384A/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
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136277—Active matrix addressed cells formed on a semiconductor substrate, e.g. of silicon
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
    • C09K19/58—Dopants or charge transfer agents
    • C09K19/582—Electrically active dopants, e.g. charge transfer agents
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Mathematical Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)

Abstract

1334384 Modulatng light MARCONI CO Ltd 11 Jan 1971 [16 May 1970] 23817/70 Heading H4F [Also in Divisions C4 and G5] A display device comprises a film 1 of liquid crystals between a sheet of material 2 with a conducting surface and a sheet 3 of amorphous semi-conductor glass with two stable resistance states having a plurality of conductive pads 4 on the side away from the liquid crystals. The pads are biased to the threshold point of the semiconductor glass and pulses are applied to selected pads to switch the glass locally to its other state. The resulting field switches the liquid crystals to provide a display which is maintained by the bias and removed either by cancelling the bias or applying a reverse potential pulse. Moving and coloured displays are referred to. The glass contains As, Ge, Si and Te. The liquid crystals include 40% cholesteryl benzoate, 40 % cholesteryl capronate and 20% cholesteryl acetate; 15% cholesteryl chloride, 80% cholesteryl nonanoate and 5% cholesteryl oleate; N-p-methoxybenzylidene-p-phenylazoaniline; n-octyl p-azoxymethyl cinnamate; butyl p-(p-ethoxyphenoxycarbonyl)-phenol carbonate and cholesteryl 2-(2-ethoxyethoxy) ethyl carbonate. Quinolinium tetra cyanoquinodimethane may be added to increase conductivity and provide a resistance heating effect in the crystals. A second liquid crystal p-ethoxybenzylidene p-cyanoaniline may be added if the liquid crystals have a very high resistance.
GB1334384D 1970-05-16 1970-05-16 Signal display apparatus Expired GB1334384A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2381770 1970-05-16

Publications (1)

Publication Number Publication Date
GB1334384A true GB1334384A (en) 1973-10-17

Family

ID=10201798

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1334384D Expired GB1334384A (en) 1970-05-16 1970-05-16 Signal display apparatus

Country Status (2)

Country Link
GB (1) GB1334384A (en)
NL (1) NL7106440A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0194947A2 (en) * 1985-03-14 1986-09-17 Commissariat A L'energie Atomique Point matrix display device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3814700A (en) * 1972-08-03 1974-06-04 Ibm Method for controllably varying the electrical properties of nematic liquids and dopants therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0194947A2 (en) * 1985-03-14 1986-09-17 Commissariat A L'energie Atomique Point matrix display device
EP0194947A3 (en) * 1985-03-14 1988-07-06 Commissariat A L'energie Atomique Point matrix display device

Also Published As

Publication number Publication date
NL7106440A (en) 1971-11-18

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Legal Events

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