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GB1120093A - Display system - Google Patents

Display system

Info

Publication number
GB1120093A
GB1120093A GB25455/66A GB2545566A GB1120093A GB 1120093 A GB1120093 A GB 1120093A GB 25455/66 A GB25455/66 A GB 25455/66A GB 2545566 A GB2545566 A GB 2545566A GB 1120093 A GB1120093 A GB 1120093A
Authority
GB
United Kingdom
Prior art keywords
control element
light
liquid crystal
film
crystal film
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
GB25455/66A
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 GB1120093A publication Critical patent/GB1120093A/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
    • G02F1/133348—Charged particles addressed liquid crystal cells, e.g. controlled by an electron beam
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
    • H04N5/7416—Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal
    • H04N5/7425—Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal the modulator being a dielectric deformable layer controlled by an electron beam, e.g. eidophor projector
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
    • H04N9/3105—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators
    • H04N9/3108—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators by using a single electronic spatial light modulator

Landscapes

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

Abstract

1,120,093. Light modulators. WESTING- HOUSE ELECTRIC CORP. 8 June, 1966 [29 June, 1965], No. 25455/66. Heading H4F. [Also in Division H1] A light control element in a display system comprises a cholesteric phase liquid crystal film which exhibits a change in its optical properties in response to temperature changes. The optical properties of the cholesteric liquid crystal film utilized in the embodiments described are optical activity, circular dichroism and selective scattering, i.e. reflection. In a first embodiment, Fig. 1, the light control element 15 comprises a liquid crystal film 21 in good thermal contact with a layer 17 exhibiting the property of absorbing modulated ultra-violet radiation from a cathode-ray tube 27 and converting the radiation image into a heat image. The light control element is positioned between a polarizer 11 and an analyzer 13 and as the temperature of the liquid crystal film is changed it rotates the plane of polarization of input monochromatic light beam 35 varying amounts and thus an information image is formed on screen 41. Layer 17 may comprise tartrazine, anthracene or phenanthrene which do not absorb the radiation from source 35. Alternatively, layer 17 may comprise nickel which absorbs about half of the incident radiation from source 35 and tube 27 and transmits a quarter of the remaining. The circular dichroic properties, i.e. the selective scattering of right- or left-hand circularly polarized light, of the film may be used by removing polarizer 11 and analyzer 13 and positioning a circular polarizer between light source 35 and control element 15, the polarizer and the film being of the same polarization, i.e. right- or left-hand. Source 35 need not be monochromatic and depending on the temperature of the film 21 the transmission properties of the polarizer, analyzer and control element vary due to the circular dichroism effect within the optical activity range of the material of the film, Fig. 4, not shown. Three separate systems may be employed using red, green and blue radiation sources to produce a sequential or simultaneous high intensity colour television image. In a second embodiment, Fig. 2, not shown, the control element is formed within a cathoderay tube and the heat image is produced by bombarding the control element with a modulated electron beam. To increase the speed of response the inner surface of the tube is coated with a plastic film, the heat conductivity of which reduces the thermal time constant of the system. In a third embodiment, utilizing the reflection, i.e. selective scattering, properties of the cholesteric liquid crystal film, the control element is formed on the inner surface of the face plate of a cathode-ray tube, Fig. 5, not shown. The control element is provided with a light-absorbing black coating adjacent the liquid crystal film so that light from a white light source is reflected, the colour of the reflected light depending on the temperature of the liquid crystal film, i.e. on the intensity of the video signal which modulates the electron beam.
GB25455/66A 1965-06-29 1966-06-08 Display system Expired GB1120093A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US46786565A 1965-06-29 1965-06-29

Publications (1)

Publication Number Publication Date
GB1120093A true GB1120093A (en) 1968-07-17

Family

ID=23857476

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25455/66A Expired GB1120093A (en) 1965-06-29 1966-06-08 Display system

Country Status (2)

Country Link
DE (1) DE1487779C3 (en)
GB (1) GB1120093A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3623795A (en) * 1970-04-24 1971-11-30 Rca Corp Electro-optical system
US3655971A (en) * 1969-08-12 1972-04-11 Xerox Corp Imaging system
JPS5411705B1 (en) * 1971-01-06 1979-05-17
GB2171534A (en) * 1985-01-07 1986-08-28 Robillard Jean J A Infrared imaging system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2275087A1 (en) * 1974-06-14 1976-01-09 Thomson Csf BLACK AND WHITE IMAGE REPRODUCTION DEVICE USING A MATERIAL WITH A SMECTIC PHASE AND TELETRANSMISSION AND TELEPHOTOOGRAPHY SYSTEM IMPLEMENTING THIS DEVICE
CN1010806B (en) * 1986-11-25 1990-12-12 北美菲利浦消费电子仪器公司 Liquid crystal display projection system having improved contrast
JPH02199444A (en) * 1989-01-30 1990-08-07 Matsushita Electric Ind Co Ltd Transmission type screen and its production, and transmission type projection television using same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3655971A (en) * 1969-08-12 1972-04-11 Xerox Corp Imaging system
US3623795A (en) * 1970-04-24 1971-11-30 Rca Corp Electro-optical system
JPS5411705B1 (en) * 1971-01-06 1979-05-17
GB2171534A (en) * 1985-01-07 1986-08-28 Robillard Jean J A Infrared imaging system
US4751387A (en) * 1985-01-07 1988-06-14 Richard L. Scully Infrared imaging system and method
USRE33914E (en) * 1985-01-07 1992-05-05 Richard L. Scully Infrared imaging system and method

Also Published As

Publication number Publication date
DE1487779A1 (en) 1969-04-30
DE1487779C3 (en) 1976-01-08
DE1487779B2 (en) 1975-05-22

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