GB2017372A - Liquid crystal display device - Google Patents

Liquid crystal display device

Info

Publication number
GB2017372A
GB2017372A GB7904912A GB7904912A GB2017372A GB 2017372 A GB2017372 A GB 2017372A GB 7904912 A GB7904912 A GB 7904912A GB 7904912 A GB7904912 A GB 7904912A GB 2017372 A GB2017372 A GB 2017372A
Authority
GB
United Kingdom
Prior art keywords
liquid crystal
zones
cell
display device
display
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
GB7904912A
Other versions
GB2017372B (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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of GB2017372A publication Critical patent/GB2017372A/en
Application granted granted Critical
Publication of GB2017372B publication Critical patent/GB2017372B/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
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • 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
    • G02F1/1339—Gaskets; Spacers; Sealing of 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
    • G02F1/13725—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 guest-host interaction
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light

Abstract

A liquid crystal (LC) display device comprises an LC cell (1) in front of a fluorescent plate (2). The LC cell comprises carrier plates (3, 4) one (4) having parts (9) of its inner face outside the display zones (8) projecting towards plate (3) which is provided with spacers (11), abutting the projecting parts (9) to reduce the LC thickness in the non-display areas; the LC material (12) contains a pleochroic dye, has positive dielectric anisotropy, is homotropically orientated at its boundary surfaces, and in the displayed non-operated zones has a cholesteric orientation whose helix pitch is such that the liquid crystal layer is continuously homotropic in the thinner light-transmissive areas and in the operated background zones. The fluorescent plate (17) receives excitation light through the cell and the device provides coloured images on a contrasting or dark background (Figure 1). <IMAGE>
GB7904912A 1978-02-13 1979-02-12 Liquid crystal display device Expired GB2017372B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2805884A DE2805884C3 (en) 1978-02-13 1978-02-13 Liquid crystal display device with a fluorescent panel

Publications (2)

Publication Number Publication Date
GB2017372A true GB2017372A (en) 1979-10-03
GB2017372B GB2017372B (en) 1982-03-03

Family

ID=6031761

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7904912A Expired GB2017372B (en) 1978-02-13 1979-02-12 Liquid crystal display device

Country Status (5)

Country Link
JP (1) JPS54121155A (en)
DE (1) DE2805884C3 (en)
FR (1) FR2417155A1 (en)
GB (1) GB2017372B (en)
IT (1) IT1110528B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2475773A1 (en) * 1980-02-08 1981-08-14 Int Standard Electric Corp ENHANCED CONTRAST-ENHANCED ELECTROLUMINESCENT DISPLAY UNIT
GB2154355A (en) * 1984-01-13 1985-09-04 Ricoh Kk Liquid crystal color display device

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56122866U (en) * 1980-02-20 1981-09-18
JPS56128979U (en) * 1980-02-27 1981-09-30
JPS56133025U (en) * 1980-03-11 1981-10-08
JPS56128920A (en) * 1980-03-14 1981-10-08 Dainippon Printing Co Ltd Manufacture of electrode substrate for liquid-crystal display element
JPS56128921A (en) * 1980-03-14 1981-10-08 Dainippon Printing Co Ltd Manufacture of electrode substrate for liquid-crystal display element

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1336254A (en) * 1972-03-17 1973-11-07 Acheson Ind Inc Devices
DE2619367A1 (en) * 1976-04-30 1977-11-17 Siemens Ag LIQUID CRYSTAL DISPLAY WITH ADDITIONAL LIGHTING

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2475773A1 (en) * 1980-02-08 1981-08-14 Int Standard Electric Corp ENHANCED CONTRAST-ENHANCED ELECTROLUMINESCENT DISPLAY UNIT
GB2154355A (en) * 1984-01-13 1985-09-04 Ricoh Kk Liquid crystal color display device

Also Published As

Publication number Publication date
DE2805884B2 (en) 1979-12-06
IT7920068A0 (en) 1979-02-09
GB2017372B (en) 1982-03-03
FR2417155A1 (en) 1979-09-07
DE2805884A1 (en) 1979-08-16
DE2805884C3 (en) 1980-08-21
JPS54121155A (en) 1979-09-20
IT1110528B (en) 1985-12-23

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Legal Events

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