GB1525954A - Liquid crystal image converters - Google Patents

Liquid crystal image converters

Info

Publication number
GB1525954A
GB1525954A GB4087/75A GB408775A GB1525954A GB 1525954 A GB1525954 A GB 1525954A GB 4087/75 A GB4087/75 A GB 4087/75A GB 408775 A GB408775 A GB 408775A GB 1525954 A GB1525954 A GB 1525954A
Authority
GB
United Kingdom
Prior art keywords
layer
photo
liquid crystal
electrode
conductive layer
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
GB4087/75A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB4087/75A priority Critical patent/GB1525954A/en
Publication of GB1525954A publication Critical patent/GB1525954A/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
    • G02F1/135—Liquid crystal cells structurally associated with a photoconducting or a ferro-electric layer, the properties of which can be optically or electrically varied
    • 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
    • G02F1/135—Liquid crystal cells structurally associated with a photoconducting or a ferro-electric layer, the properties of which can be optically or electrically varied
    • G02F1/1357—Electrode structure

Abstract

1525954 Controlling light STANDARD TELEPHONES & CABLES Ltd 20 Jan 1976 [30 Jan 1976] 4087/75 Heading G2F An image converter comprises, in order in a stack, a first electrode 19, a liquid crystal layer 21, a photo-conductive layer 12 and a second electrode 10, the latter being structured, e.g. in the form of spaced parallel strips electrically in common, so as not to cover the entire photo-conductive layer and to reduce the dark capacitance thereof, so that a greater proportion of an A.C. potential difference applied between the electrodes is developed across the photo-conductive layer. When an image is incident on the photo-conductor there is local increase in capacitance due to lateral conductivity in addition to the reduction in resistance so that the potential difference is more effectively transferred to the liquid crystal layer. As shown, the layer 21 is a 90 degree twisted nematic layer between an aligning layer 20 of oblique evaporated SiO and a second aligning layer 16. Polarizing layers 15 and 18 are provided, and in some cases layers 15 and 16 may be the same layer. A dielectric opaque CdTe blocking layer 13 separates layer 12 from a mosaic Al reflector 14. The strips of electrode 10 are not necessarily transparent and may be 5Á wide with a pitch of 15Á.
GB4087/75A 1976-01-20 1976-01-20 Liquid crystal image converters Expired GB1525954A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4087/75A GB1525954A (en) 1976-01-20 1976-01-20 Liquid crystal image converters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4087/75A GB1525954A (en) 1976-01-20 1976-01-20 Liquid crystal image converters

Publications (1)

Publication Number Publication Date
GB1525954A true GB1525954A (en) 1978-09-27

Family

ID=9770494

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4087/75A Expired GB1525954A (en) 1976-01-20 1976-01-20 Liquid crystal image converters

Country Status (1)

Country Link
GB (1) GB1525954A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0014608A1 (en) * 1979-02-13 1980-08-20 Thomson-Csf Electro-optical display device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0014608A1 (en) * 1979-02-13 1980-08-20 Thomson-Csf Electro-optical display device
FR2449314A1 (en) * 1979-02-13 1980-09-12 Thomson Csf ELECTRO-OPTICAL DISPLAY DEVICE

Similar Documents

Publication Publication Date Title
US3824002A (en) Alternating current liquid crystal light value
EP0221361A1 (en) Liquid-crystal display device
KR100878379B1 (en) Liquid crystal display device
KR840007316A (en) Photovoltaic devices
GB1398457A (en) Blocking diode for solar cell panel array
KR960700621A (en) SUNLIGHT VIEWABLE THIN FILM ELECTROLUMINESCENT DISPLAY HAVING A GRADED LAYER OF LIGHT ABSORBING DARK MATERIAL
KR870008213A (en) Liquid crystal device with charge storage structure
KR950704926A (en) SUNLIGHT VIEWABLE THIN FILM ELECTROLUMINESCENT DISPLAY HAVING DARKENED METAL ELECTRODES
JPH04238321A (en) Liquid crystal display device
KR910001429A (en) Optical address liquid crystal light valve
GB1525954A (en) Liquid crystal image converters
US5220445A (en) Optical image processor
JPS62169120A (en) Space optical modulator
CN105807515A (en) Display
CN111367110A (en) Display panel and electronic equipment
FR2296902A1 (en) Light valve with a liquid crystal layer - this layer is held between two chemically neutral, electrically insulating layers (NL080776)
JPS57115880A (en) Thin film image pickup device in two dimensions
GB1457343A (en) Transparent photocell
JPS57157578A (en) Active crystalline silicon thin film photovoltaic element
JPS6240729B2 (en)
JPS5619276A (en) Solid state image pickup device
JPS5793317A (en) Solid-state optical shutter
JPS61280659A (en) Contact type image sensor
JPS6421957A (en) Image sensor
JPS56146375A (en) Solid-state pickup device

Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930120