GB780162A - Electroluminescent lamps - Google Patents
Electroluminescent lampsInfo
- Publication number
- GB780162A GB780162A GB649/54A GB64954A GB780162A GB 780162 A GB780162 A GB 780162A GB 649/54 A GB649/54 A GB 649/54A GB 64954 A GB64954 A GB 64954A GB 780162 A GB780162 A GB 780162A
- Authority
- GB
- United Kingdom
- Prior art keywords
- donator
- zinc
- host crystal
- sulphide
- activator
- 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
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
Landscapes
- Luminescent Compositions (AREA)
Abstract
780,162. Electroluminescence. SYLVANIA ELECTRIC PRODUCTS, Inc. Jan. 8, 1954 [Jan. 9, 1953], No. 649/54. Drawings to Specification. Class 39(1). An electroluminescent material comprises a host crystal of one or more of the sulphide, selenide or silicate of one or more of the metals cadmium, zinc, calcium or strontium, an activator e.g. copper, manganese or silver, and a donator consisting of one or more of the metals thallium, indium or tin. Zinc oxide may be included in the host crystal e.g. zinc sulphide, up to an amount of 25 per cent thereof, as may zinc chloride. The donator material is between 0À00005 and 0À0000005 gram atom per mole of host crystal. The presence of activator and absence of donator in certain parts of the host crystal are said to produce depletion layers of higher resistivity than the donator-containing material, which are locations of high field density. These layers are produced by chemical treatment of the fired powder with acetic acid or ammonium acetate, the two being successively ground together with increasing dilution of the acetic acid or the acetate, finally rinsing with pure water. Other ammonium salts may be used. Zinc sulphide activated with copper and containing zinc oxide is stated to give greenish yellow luminescence at 60 cycles/sec. and blue luminescence at 2000 cycles. The electroluminescent materials may be mixed with or embedded in dielectric material, e.g. nitrocellulose or castor oil, and enclosed between conductive electrodes, either reflective or transparent, or disposed between two conductor wires wound side by side or between conducting coatings formed on insulating supports, Figs. 1-5 (not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US780162XA | 1953-01-09 | 1953-01-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB780162A true GB780162A (en) | 1957-07-31 |
Family
ID=22141401
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB649/54A Expired GB780162A (en) | 1953-01-09 | 1954-01-08 | Electroluminescent lamps |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB780162A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2254044A1 (en) * | 1971-11-05 | 1973-05-10 | Gen Electric Co Ltd | ELECTROLUMINESCENT DISPLAY DEVICE AND METHOD FOR MANUFACTURING IT |
-
1954
- 1954-01-08 GB GB649/54A patent/GB780162A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2254044A1 (en) * | 1971-11-05 | 1973-05-10 | Gen Electric Co Ltd | ELECTROLUMINESCENT DISPLAY DEVICE AND METHOD FOR MANUFACTURING IT |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4365184A (en) | Phosphors | |
US2838715A (en) | Electroluminescent lamp | |
US2957830A (en) | Process for producing electroluminescent phosphors | |
US2821509A (en) | Method of making an electroluminescent zinc sulfide phosphor | |
Vecht | Electroluminescent displays | |
GB1438963A (en) | Electroluminescent display panels | |
US2911553A (en) | Electro-luminescent element | |
US3082344A (en) | Method for improving electroluminescent phosphor and electroluminescent lamp | |
GB780162A (en) | Electroluminescent lamps | |
US3154712A (en) | Electroluminescent lamp | |
GB748683A (en) | Improvements in electroluminescent devices | |
US3104339A (en) | Electroluminescent device | |
US3023338A (en) | Electroluminescent lamp and method | |
US2802792A (en) | Electroluminescent phosphors | |
US2745811A (en) | Blue electroluminescent zinc sulfide phosphor | |
GB956471A (en) | Improvements in or relating to semiconductor devices | |
US2980816A (en) | Electroluminescent lamp | |
US2772242A (en) | Electroluminescent zinc sulfide phosphor | |
US3054919A (en) | Method of improving electroluminescent phosphor and electroluminescent device | |
US2980627A (en) | Electro-luminescent zinc sulfide iodide fluxed phosphors, and method for their preparation | |
US2731423A (en) | Electroluminescent materials and method of preparation | |
GB735752A (en) | Electroluminescent lamp | |
US2988515A (en) | Electroluminescent phosphor | |
US2919249A (en) | Electroluminescent phosphors | |
US3017366A (en) | Electroluminescent phosphor and treatment |