GB1299870A - Improvements in or relating to electroluminescent display devices - Google Patents

Improvements in or relating to electroluminescent display devices

Info

Publication number
GB1299870A
GB1299870A GB2355669A GB2355669A GB1299870A GB 1299870 A GB1299870 A GB 1299870A GB 2355669 A GB2355669 A GB 2355669A GB 2355669 A GB2355669 A GB 2355669A GB 1299870 A GB1299870 A GB 1299870A
Authority
GB
United Kingdom
Prior art keywords
voltage
semi
luminescence
conductor
electroluminescent display
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
GB2355669A
Inventor
Dennis William George Byatt
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
Marconi 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 Marconi Co Ltd filed Critical Marconi Co Ltd
Priority to GB2355669A priority Critical patent/GB1299870A/en
Publication of GB1299870A publication Critical patent/GB1299870A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces

Landscapes

  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

1299870 Electroluminescence MARCONI CO Ltd 21 Jan 1970 [8 May 1969] 23556/69 Heading C4S [Also in Division G5] An electroluminescent display device comprises superimposed layers of electroluminescent and semi-conductor material between two sets of crossed conductors A 1 A 2 A 3 ... An, B 1 B 2 B 3 ... B n , the layers being continuous sheets or matrices of discrete elements, the semi-conductor material having a high resistance when a low voltage is applied and a low resistance when a voltage above a critical value is applied, means 3 for applying a first voltage between a selected conductor in each set sufficient to maintain but not produce luminescence and means S for applying a supplementary voltage pulse which superimposed on the first voltage produces luminescence. The voltage pulses are applied via distributor switches SA, SB to produce scanning of the device. The source S applies A.C. or D.C. potential, if D.C. is used a pulse of opposite polarity will extinguish luminescence. The semi-conductor may be a chalcogenide glass.
GB2355669A 1969-05-08 1969-05-08 Improvements in or relating to electroluminescent display devices Expired GB1299870A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2355669A GB1299870A (en) 1969-05-08 1969-05-08 Improvements in or relating to electroluminescent display devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2355669A GB1299870A (en) 1969-05-08 1969-05-08 Improvements in or relating to electroluminescent display devices

Publications (1)

Publication Number Publication Date
GB1299870A true GB1299870A (en) 1972-12-13

Family

ID=10197578

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2355669A Expired GB1299870A (en) 1969-05-08 1969-05-08 Improvements in or relating to electroluminescent display devices

Country Status (1)

Country Link
GB (1) GB1299870A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2419785A2 (en) * 2009-04-15 2012-02-22 Dolby Laboratories Licensing Corporation Thin displays having spatially variable backlights

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2419785A2 (en) * 2009-04-15 2012-02-22 Dolby Laboratories Licensing Corporation Thin displays having spatially variable backlights
EP2419785A4 (en) * 2009-04-15 2013-11-20 Dolby Lab Licensing Corp Thin displays having spatially variable backlights
US8810503B2 (en) 2009-04-15 2014-08-19 Dolby Laboratories Licensing Corporation Thin displays having spatially variable backlights

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee