GB749798A - Light amplifying device - Google Patents

Light amplifying device

Info

Publication number
GB749798A
GB749798A GB120/54A GB12054A GB749798A GB 749798 A GB749798 A GB 749798A GB 120/54 A GB120/54 A GB 120/54A GB 12054 A GB12054 A GB 12054A GB 749798 A GB749798 A GB 749798A
Authority
GB
United Kingdom
Prior art keywords
layer
electroluminescent
light
filter elements
jan
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
GB120/54A
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
Publication of GB749798A publication Critical patent/GB749798A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/12—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof structurally associated with, e.g. formed in or on a common substrate with, one or more electric light sources, e.g. electroluminescent light sources, and electrically or optically coupled thereto
    • H01L31/14—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof structurally associated with, e.g. formed in or on a common substrate with, one or more electric light sources, e.g. electroluminescent light sources, and electrically or optically coupled thereto the light source or sources being controlled by the semiconductor device sensitive to radiation, e.g. image converters, image amplifiers or image storage devices

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

749,798. Electroluminescence. STANDARD TELEPHONES & CABLES, Ltd. Jan. 4, 1954 [Jan. 22, 1953], No. 120/54. Class 39 (1). A colour filter is located on the external face of a light amplifying device which'comprises a layer of material whose impedance varies with light intensity superimposed on a layer of electroluminescent material, and the two enclosed between laminar electrodes, one of which is light-transmitting. Laminµ of colour filter elements 17, 18, 19 and 20, 21, 22 are formed on one or both sides of the screen which comprises transparent electrode layers 3, 6, a layer 4 of a material, e.g. cadmium, antimony or lead sulphide whose resistance or dielectric constant varies with the amplitude of the incident radiation, and an electroluminescent layer 5. An opaque layer 7 of insulation separates layers 4, 5, but in Fig. 2 (not shown), the layer 7 and filter elements 20, 21, 22 are omitted and the electrode 6 is made opaque, the light emitted by layer 5 passing out through filter elements 17, 18, 19. When feed-back from the electroluminescent layer to the photo-conductive layer is utilized, the alternating potential is applied in pulses of period equal to the saturation time of the electroluminescent layer. The device may be used to convert an image in short, medium and long wave length ultra-violet into a red, green and blue image. It is also used for amplification in colour television projection systems and in motion picture projection. Where the device receives and transmits from one side only, either the photo-sensitive layer or the electroluminescent layer is transparent according to their position relative to the incident radiation.
GB120/54A 1953-01-22 1954-01-04 Light amplifying device Expired GB749798A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US749798XA 1953-01-22 1953-01-22

Publications (1)

Publication Number Publication Date
GB749798A true GB749798A (en) 1956-05-30

Family

ID=22122797

Family Applications (1)

Application Number Title Priority Date Filing Date
GB120/54A Expired GB749798A (en) 1953-01-22 1954-01-04 Light amplifying device

Country Status (1)

Country Link
GB (1) GB749798A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1044869B (en) * 1956-08-16 1958-11-27 Gen Electric Color display system
DE1056176B (en) * 1957-09-25 1959-04-30 Standard Elektrik Lorenz Ag Arrangement for the reproduction of color television pictures by means of an electroluminescent screen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1044869B (en) * 1956-08-16 1958-11-27 Gen Electric Color display system
DE1056176B (en) * 1957-09-25 1959-04-30 Standard Elektrik Lorenz Ag Arrangement for the reproduction of color television pictures by means of an electroluminescent screen

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