GB1118227A - A display system - Google Patents

A display system

Info

Publication number
GB1118227A
GB1118227A GB26479/66A GB2647966A GB1118227A GB 1118227 A GB1118227 A GB 1118227A GB 26479/66 A GB26479/66 A GB 26479/66A GB 2647966 A GB2647966 A GB 2647966A GB 1118227 A GB1118227 A GB 1118227A
Authority
GB
United Kingdom
Prior art keywords
photo
conductive
liquid crystal
crystal film
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
GB26479/66A
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.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of GB1118227A publication Critical patent/GB1118227A/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
    • G02F1/132—Thermal activation of liquid crystals exhibiting a thermo-optic effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/28—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating
    • B41M5/281—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using thermochromic compounds or layers containing liquid crystals, microcapsules, bleachable dyes or heat- decomposable compounds, e.g. gas- liberating using liquid crystals only
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/29—Measurement performed on radiation beams, e.g. position or section of the beam; Measurement of spatial distribution of radiation
    • G01T1/2914—Measurement of spatial distribution of radiation
    • G01T1/2921—Static instruments for imaging the distribution of radioactivity in one or two dimensions; Radio-isotope cameras
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/30—Transforming light or analogous information into electric information
    • H04N5/33—Transforming infrared radiation

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Molecular Biology (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Mathematical Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

1,118,227. Light modulators. WESTING- HOUSE ELECTRIC CORP. 14 June, 1966 [29 June, 1965], No. 26479/66. Heading H4F. [Also in Division G1] A display screen comprises a cholesteric phase liquid crystal film which exhibits a change in its optical scattering properties i.e. reflecting properties, in response to temperature changes, thermal images of input radiation to be displayed being impressed on the liquid crystal film by means of a radiation sensitive structure associated with electric current heating means extending over the liquid crystal film in thermal contact therewith, the electric current flow varying from elemental screen area to elemental screen area in accordance with local levels of the input radiation. A visible, infrared or ultra-violet radiation image generated on the face of a cathode ray tube is directed towards the display screen and white or monochromatic light incident on the display screen is selectively scattered in accordance with the temperature of the liquid crystal film and a coloured or monochromatic brightness image is displayed. The display screen, Fig. 2, comprises a support layer 30, a thermal barrier layer 32, a photo-conductive layer 34, comb-like electrodes 36 having conductive strips 38 and 40 respectively connected to bus-bars 42 and 44 supplied by a potential source 50, an optical isolation layer 52 which prevents the viewing light source effecting the photo-conductive layer 34, a cholesteric phase liquid crystal layer 54 and a protective film 56. In operation the amount of illumination from the radiation image directed on to the photo-conductive layer 34 determines the amount of current flowing between the electrode strips 38 and 40 and thus the heating of the photo-conductive layer. Power dissipation from the resulting photo-current is localized to only the illuminated areas by the electrode structure. The resulting temperature rises in the liquid crystal film causes its reflection band to be shifted towards a shorter wavelength part of the spectrum resulting in a coloured image if the viewing light source is white light. In further embodiments the photo-conductive and electrode system are replaced by two conductive bus-bars bridged by photo-conductive strips having conductive elements interspersed therein, Fig. 3, not shown, and by a photo-conductive layer sandwiched between two conductive layers, Fig. 4 not shown. Sound energy may be converted into visible energy by detecting the sound on an element whose resistance is modified associated with a heating element.
GB26479/66A 1965-06-29 1966-06-14 A display system Expired GB1118227A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US467864A US3401262A (en) 1965-06-29 1965-06-29 Radiation sensitive display system utilizing a cholesteric liquid crystalline phase material

Publications (1)

Publication Number Publication Date
GB1118227A true GB1118227A (en) 1968-06-26

Family

ID=23857474

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26479/66A Expired GB1118227A (en) 1965-06-29 1966-06-14 A display system

Country Status (4)

Country Link
US (1) US3401262A (en)
DE (1) DE1276086B (en)
FR (1) FR1484585A (en)
GB (1) GB1118227A (en)

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3569709A (en) * 1968-03-27 1971-03-09 Optical Coating Laboratory Inc Thermal imaging system utilizing liquid crystal material
US3619254A (en) * 1969-03-18 1971-11-09 Liquid Crystal Ind Thermometric articles and methods for preparing same
US3585381A (en) * 1969-04-14 1971-06-15 Ncr Co Encapsulated cholesteric liquid crystal display device
US3627699A (en) * 1969-04-30 1971-12-14 Westinghouse Electric Corp Liquid crystal cholesteric material and sensitizing agent composition and method for detecting electromagnetic radiation
US3720658A (en) * 1969-04-30 1973-03-13 Westinghouse Electric Corp Cholesteryl p-phenylazophenyl carbonate
US3576364A (en) * 1969-05-20 1971-04-27 Rca Corp Color advertising display employing liquid crystal
US3622224A (en) * 1969-08-20 1971-11-23 Xerox Corp Liquid crystal alpha-numeric electro-optic imaging device
US3604930A (en) * 1970-03-05 1971-09-14 Philips J Allen Method and apparatus for displaying visual images of infrared beams
US3663390A (en) * 1970-09-24 1972-05-16 Westinghouse Electric Corp Method of changing color play range of liquid crystal materials
US3706845A (en) * 1970-10-08 1972-12-19 Rca Corp Method of improving the {65 {40 of a cathodochromic display device
US5432526A (en) * 1970-12-28 1995-07-11 Hyatt; Gilbert P. Liquid crystal display having conductive cooling
US5398041A (en) * 1970-12-28 1995-03-14 Hyatt; Gilbert P. Colored liquid crystal display having cooling
US3666948A (en) * 1971-01-06 1972-05-30 Xerox Corp Liquid crystal thermal imaging system having an undisturbed image on a disturbed background
US3666947A (en) * 1971-01-06 1972-05-30 Xerox Corp Liquid crystal imaging system having an undisturbed image on a disturbed background and having a radiation absorptive material dispersed throughout the liquid crystal
US3726584A (en) * 1971-05-28 1973-04-10 Xerox Corp Light modulation system
JPS4878897A (en) * 1972-01-21 1973-10-23
US3859527A (en) * 1973-01-02 1975-01-07 Eastman Kodak Co Apparatus and method for producing images corresponding to patterns of high energy radiation
US3916420A (en) * 1974-05-06 1975-10-28 Ncr Co Printer and display system
US3952193A (en) * 1974-09-25 1976-04-20 Xerox Corporation Imaging method with U.V. excitation of liquid crystal
DE2653419A1 (en) * 1976-11-24 1978-06-01 Bayer Ag PROCESS FOR CONVERTING LIGHTNESS VALUES IN ISOCHROMATS
FR2444381A1 (en) * 1978-12-15 1980-07-11 Thomson Csf LIQUID CRYSTAL DISPLAY DEVICE
FR2462755A1 (en) * 1979-07-27 1981-02-13 Thomson Csf LIQUID CRYSTAL VISUALIZATION DEVICE, AND TELEPHONE TERMINAL COMPRISING SUCH A DEVICE
FR2523343A1 (en) * 1982-03-09 1983-09-16 Thomson Csf SCREEN OF A VISUALIZATION DEVICE USING A THERMAL AND ELECTRICAL MIXED EFFECT
GB8829035D0 (en) * 1988-12-13 1989-07-05 Emi Plc Thorn Thermal imaging device
US6219093B1 (en) * 1990-01-05 2001-04-17 Light & Sound Design, Ltd. Method and device for creating a facsimile of an image
US6421165B2 (en) 1996-02-07 2002-07-16 Light & Sound Design Ltd. Programmable light beam shape altering device using programmable micromirrors
US6885409B2 (en) * 2002-09-27 2005-04-26 Eastman Kodak Company Cholesteric liquid crystal display system
US7131584B2 (en) * 2003-11-13 2006-11-07 Eastman Kodak Company Apparatus and means for updating a memory display
US7286111B2 (en) * 2003-11-13 2007-10-23 Eastman Kodak Company Apparatus for electro-optically writing a display
US7522141B2 (en) * 2003-12-01 2009-04-21 Industrial Technology Research Institute Cholesteric liquid crystal display system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2788452A (en) * 1952-07-29 1957-04-09 Ernest J Sternglass Thermal image detecting tube
US3114836A (en) * 1960-03-04 1963-12-17 Westinghouse Electric Corp Thermal imaging devices utilizing a cholesteric liquid crystalline phase material

Also Published As

Publication number Publication date
DE1276086B (en) 1968-08-29
US3401262A (en) 1968-09-10
DE1276086C2 (en) 1969-04-10
FR1484585A (en) 1967-06-09

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