GB800581A - Improvements in or relating to electroluminescent devices - Google Patents

Improvements in or relating to electroluminescent devices

Info

Publication number
GB800581A
GB800581A GB250156A GB250156A GB800581A GB 800581 A GB800581 A GB 800581A GB 250156 A GB250156 A GB 250156A GB 250156 A GB250156 A GB 250156A GB 800581 A GB800581 A GB 800581A
Authority
GB
United Kingdom
Prior art keywords
activated
manganese
zinc
cadmium
excitable
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
GB250156A
Inventor
Herbert Colin Bate
James Norman Bowtell
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.)
General Electric Co PLC
Original Assignee
General Electric Co 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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB250156A priority Critical patent/GB800581A/en
Publication of GB800581A publication Critical patent/GB800581A/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
    • H05B33/14—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material, or by the simultaneous addition of the electroluminescent material in or onto the light source
    • H05B33/145—Arrangements of the electroluminescent material

Abstract

800,581. Electroluminescence. GENERAL ELECTRICAL CO., Ltd. Jan. 25, 1957 [Jan. 25, 1956], No. 2501/56. Addition to 788,659. Class 39(1). An electroluminescent device is made of crystals coated with a translucent layer of electrolyte and compacted as in the parent Specification the crystals however in an uncoated condition being of a material which is not excitable to luminescence by a fluctuating electric field but is excitable to luminescence by cathode rays. In the examples, zinc sulphide activated by silver or phosphorous, zinc cadmium sulphide activated by copper or silver, calcium magnesium silicate activated by titanium, and cadmium chlorophosphate activated by manganese may be coated with potassium phosphate and zinc sulphide activated by silver or manganese, zinc cadmium sulphide activated by copper, cadmium borate activated by manganese, calcium chlorofluorophosphate activated by antimony and manganese, zinc silicate activated by manganese and calcium pyraphosphate activated by dysprosium may be coated with potassium silicate. It is stated that devices in accordance with the invention and with that of the parent Specification are excitable to luminescence by both D.C. and A.C.
GB250156A 1956-01-25 1956-01-25 Improvements in or relating to electroluminescent devices Expired GB800581A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB250156A GB800581A (en) 1956-01-25 1956-01-25 Improvements in or relating to electroluminescent devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB250156A GB800581A (en) 1956-01-25 1956-01-25 Improvements in or relating to electroluminescent devices

Publications (1)

Publication Number Publication Date
GB800581A true GB800581A (en) 1958-08-27

Family

ID=9740678

Family Applications (1)

Application Number Title Priority Date Filing Date
GB250156A Expired GB800581A (en) 1956-01-25 1956-01-25 Improvements in or relating to electroluminescent devices

Country Status (1)

Country Link
GB (1) GB800581A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2212980A (en) * 1987-11-21 1989-08-02 Emi Plc Thorn Electroluminescent display device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2212980A (en) * 1987-11-21 1989-08-02 Emi Plc Thorn Electroluminescent display device
US4982135A (en) * 1987-11-21 1991-01-01 Thorn Emi Plc Electroluminescent device
GB2212980B (en) * 1987-11-21 1991-02-20 Emi Plc Thorn Electroluminescent display device

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