GB898902A - Photoconductive control circuit for light amplifiers and like devices - Google Patents

Photoconductive control circuit for light amplifiers and like devices

Info

Publication number
GB898902A
GB898902A GB30547/58A GB3054758A GB898902A GB 898902 A GB898902 A GB 898902A GB 30547/58 A GB30547/58 A GB 30547/58A GB 3054758 A GB3054758 A GB 3054758A GB 898902 A GB898902 A GB 898902A
Authority
GB
United Kingdom
Prior art keywords
panel
photoconductive
arrangement
polarity
light
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
GB30547/58A
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.)
RCA Corp
Original Assignee
RCA Corp
Radio Corporation of America
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 RCA Corp, Radio Corporation of America filed Critical RCA Corp
Publication of GB898902A publication Critical patent/GB898902A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01J29/36—Photoelectric screens; Charge-storage screens
    • H01J29/39—Charge-storage screens
    • H01J29/45—Charge-storage screens exhibiting internal electric effects caused by electromagnetic radiation, e.g. photoconductive screen, photodielectric screen, photovoltaic screen
    • 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
    • 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
    • H01L31/08—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 in which radiation controls flow of current through the device, e.g. photoresistors
    • H01L31/10—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 in which radiation controls flow of current through the device, e.g. photoresistors characterised by potential barriers, e.g. phototransistors

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)

Abstract

898,902. Electro-luminescence. RADIO CORPORATION OF AMERICA. Sept. 24, 1958 [Sept. 30, 1957], No. 30547/58. Class 39(1). [Also in Group XL(b)] In an arrangement for reducing the delay time of conductivity of a photoconductive material on removal of impinging radiant energy, the polarity of the operating voltage is reversed immediately following the removal of the radiant energy. A light amplifying panel 30 includes an electro-luminescent layer 34 and a ridged photoconductive layer 38. Operating voltages are supplied via changeover switch 16 and rectifiers 40, 46 from a transformer 44 and the arrangement is such that alternate ridges of the photoconductive layer are supplied during one half cycle of the voltage supply and the remaining ridges during the other half cycle. When the photoconductive side of the panel is subjected to radiation the electroluminescent panel emits an amplified version of the incident image. On removing the incident radiation the delay time of the output image is reduced by reversing the polarity of the supply voltage by operation of switch 16. Uniformity of erasure is ensured by flooding the panel with light from source 23 immediately prior to the polarity reversal. Fig. 3 (not shown) illustrates the application of the invention to a light storage panel and Fig. 4 (not shown) illustrates an arrangement in which the rate of delay can be selected.
GB30547/58A 1957-09-30 1958-09-24 Photoconductive control circuit for light amplifiers and like devices Expired GB898902A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US686949A US2957991A (en) 1957-09-30 1957-09-30 Photoconductive control circuit for light amplifiers and like device

Publications (1)

Publication Number Publication Date
GB898902A true GB898902A (en) 1962-06-14

Family

ID=24758409

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30547/58A Expired GB898902A (en) 1957-09-30 1958-09-24 Photoconductive control circuit for light amplifiers and like devices

Country Status (7)

Country Link
US (1) US2957991A (en)
JP (1) JPS3814682B1 (en)
CH (1) CH366337A (en)
DE (1) DE1070755B (en)
DK (1) DK103954C (en)
FR (1) FR1203338A (en)
GB (1) GB898902A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3210549A (en) * 1960-11-22 1965-10-05 Philips Corp Variable-feedback electro-optical device
US3107303A (en) * 1960-12-28 1963-10-15 Bell Telephone Labor Inc Positive or negative high gain image amplifier
US3204106A (en) * 1960-12-28 1965-08-31 Rca Corp Storage-type electroluminescent image amplifier
DE1271280B (en) * 1960-12-29 1968-06-27 Philips Nv Device with a solid image amplifier connected to an electrical power supply
US3173014A (en) * 1961-06-30 1965-03-09 Gen Electric Electroluminescent quenching of a photoconductor through a substrate

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2743430A (en) * 1952-03-01 1956-04-24 Rca Corp Information storage devices
US2773992A (en) * 1953-06-17 1956-12-11 Itt Display amplifier and method of making same
US2897399A (en) * 1957-01-25 1959-07-28 Ibm Memory devices

Also Published As

Publication number Publication date
DE1070755B (en)
FR1203338A (en) 1960-01-18
CH366337A (en) 1962-12-31
US2957991A (en) 1960-10-25
JPS3814682B1 (en) 1963-08-12
DK103954C (en) 1966-03-14

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