GB376498A - Improvements in or relating to television receiving systems and cathode ray devices suitable for use therein - Google Patents

Improvements in or relating to television receiving systems and cathode ray devices suitable for use therein

Info

Publication number
GB376498A
GB376498A GB19797/31A GB1979731A GB376498A GB 376498 A GB376498 A GB 376498A GB 19797/31 A GB19797/31 A GB 19797/31A GB 1979731 A GB1979731 A GB 1979731A GB 376498 A GB376498 A GB 376498A
Authority
GB
United Kingdom
Prior art keywords
screen
source
light
plates
cathode
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
GB19797/31A
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
Marconis Wireless Telegraph 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 Marconis Wireless Telegraph Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB376498A publication Critical patent/GB376498A/en
Expired legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Abstract

376,498. Television receivers ; cathoderay tubes. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., Marconi House, Strand, London.-(Assignees of Zworykin, V. K. ; 22, Merrick Villa, Collingswood, New Jersey, U.S.A.) July 9, 1931, No. 19797. Convention date, Aug. 15, 1930. [Classes 39 (i) and 40 (iii).] In a television system the picture is reproduced on a screen by a constant light-source in conjunction with a light-valve arrangement controlled by a moving beam of cathode rays. The cathode beam 27 emitted from a gun 20 is controlled in intensity by the received signals through an amplifier 22 and is deflected under the action of coils 25, 26 to scan a control screen or light-valve arrangement 15 interposed between a constant light-source 12 and the viewing screen 11. The control member 15, which is subjected to a high voltage from a source 29, comprises a series of apertures 16 and co-operating plates 17 pivoted to members 18 attached to the structure 15 by a cement 19 of low conductivity. The varying intensity of the cathode beam 27 effects corresponding and sequential variations of the discharge of the plates 17 which, in consequence, change their positions to vary the illumination by the constant source 12 of the corresponding elemental areas of the screen 11. In a modification, Figs. 4 and 5, the screen is illuminated by reflection from the screen 15a which is constructed with a highly reflecting surface 32 whose elemental areas are shielded from the constant light-source 12 to varying extents dependent upon the positions taken up by the plates 33 under control of the cathode beam. The front surfaces of the plates 33 are arranged to be non-reflecting. According to a further modification successive elemental areas of a screen of material normally opaque to the light from the source 12 are rendered variably transparent in accordance with the intensity of the cathode beam. A substance known as " Willemite " is stated to be suitable for such a screen.
GB19797/31A 1930-08-15 1931-07-09 Improvements in or relating to television receiving systems and cathode ray devices suitable for use therein Expired GB376498A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US475449A US2025143A (en) 1930-08-15 1930-08-15 System for reception by television

Publications (1)

Publication Number Publication Date
GB376498A true GB376498A (en) 1932-07-14

Family

ID=23887603

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19797/31A Expired GB376498A (en) 1930-08-15 1931-07-09 Improvements in or relating to television receiving systems and cathode ray devices suitable for use therein

Country Status (4)

Country Link
US (1) US2025143A (en)
BE (1) BE381997A (en)
DE (1) DE565813C (en)
GB (1) GB376498A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE743587C (en) * 1936-01-30 1943-12-29 Interessengemeinschaft Fuer Ru Braun tubes, especially for television purposes
DE755826C (en) * 1935-11-20 1953-02-23 Marconi Wireless Telegraph Co Projection device for television receivers
DE887520C (en) * 1936-07-09 1953-08-24 Pierre Marie Gabriel Toulon Receiving arrangement for the reproduction of televised images
DE952102C (en) * 1932-09-30 1956-11-08 Rca Corp Scanning method for television cathode ray tubes

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733501A (en) * 1956-02-07 Electrostatic shutter mosaic and method of manufacture
DE751849C (en) * 1935-06-14 1954-08-09 Fernseh Gmbh Light control screen for cathode ray tubes
DE741765C (en) * 1937-01-20 1943-11-17 Fernseh Gmbh Projection method
US2471409A (en) * 1945-09-13 1949-05-31 Standard Telephones Cables Ltd Indicating tube system
FR994390A (en) * 1949-06-09 1951-11-15 Device for projecting television images
US2591308A (en) * 1950-10-20 1952-04-01 Frank K Singiser Light valve system
US2682010A (en) * 1951-08-07 1954-06-22 Us Air Force Cathode-ray projection tube
US2681380A (en) * 1951-09-26 1954-06-15 Us Air Force Color television projection system
US3166635A (en) * 1961-09-25 1965-01-19 Joachim H Todt Thin film magnetic shutter display panel
US3210757A (en) * 1962-01-29 1965-10-05 Carlyle W Jacob Matrix controlled light valve display apparatus
US3275746A (en) * 1962-12-11 1966-09-27 Beltrami Aurelio Simultaneous multiple two-way multiplex communications systems
US3553364A (en) * 1968-03-15 1971-01-05 Texas Instruments Inc Electromechanical light valve
US3678196A (en) * 1970-10-20 1972-07-18 Solo S Roth Means for projecting an enlarged television image
US3797919A (en) * 1972-06-30 1974-03-19 Nasa High-speed shutter
US4592628A (en) * 1981-07-01 1986-06-03 International Business Machines Mirror array light valve

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE952102C (en) * 1932-09-30 1956-11-08 Rca Corp Scanning method for television cathode ray tubes
DE755826C (en) * 1935-11-20 1953-02-23 Marconi Wireless Telegraph Co Projection device for television receivers
DE743587C (en) * 1936-01-30 1943-12-29 Interessengemeinschaft Fuer Ru Braun tubes, especially for television purposes
DE887520C (en) * 1936-07-09 1953-08-24 Pierre Marie Gabriel Toulon Receiving arrangement for the reproduction of televised images

Also Published As

Publication number Publication date
BE381997A (en)
DE565813C (en) 1932-12-08
US2025143A (en) 1935-12-24

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