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Publication numberUS2714683 A
Publication typeGrant
Publication dateAug 2, 1955
Filing dateDec 2, 1952
Priority dateDec 19, 1951
Also published asDE957249C
Publication numberUS 2714683 A, US 2714683A, US-A-2714683, US2714683 A, US2714683A
InventorsHenry G Jenkins
Original AssigneeGen Electric
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electroluminescent bulb
US 2714683 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

s. nu N V/ wn e i td n.. t eGKt VYrA mr e H M if H/ f Y IO H. G. JENKINS ELECTROLUMINESCENT BULB Filed Dec. 2, 1952 Aug. 2, 1955 Gianni,

0.25% by weight of copper in the dried mixture, the the latter being ground thoroughly and fired at 800900 C. in a closed boat for several hours.

The conducting coating may be applied by spraying or painting the layer 4 with a suitable conducting material but is preferably applied by the evaporation of a suitable metal such as aluminum. This evaporation may convenientiy be effected by attaching a short length of Wire of the metal between the leads 7 and 8, as indicated by the dotted line 18 in the drawing, and after evacuation of the bulb7 heating the Wire by the passage of current through it, with the bulb support neck downwards, so as to evaporate the wire and form the required coating, an insulating bae 19 attached to the leads 7 and 8 preventing the possibility of the evaporated metal short-circuiting the two conducting coatings at the neck of the bulb. The bulb is then filled with dry nitrogen to atmospheric pressure and sealed, after which the cap is attached to the neck of the bulb.

While a certain specic embodiment of the invention has been shown and described, various modiications thereof are possible, and the appended claims are intended to cover any such modications coming within the scope of the invention.

The alkyd resin known under the British trade name Paralac 1G is a long-oil linseed oil Inodiiied alkyd resin containing pentaerythritol and no added glycerol.

What l claim as new and desire to secure by Letters Patent of the United States is:

1. An electroluminescent lamp comprising a transparent bulb sealed free of moisture and having a conductive inside surface, a layer containing an electroluminescent material formed over said conductive surface, a conductive layer formed over said electroluminescent material layer, and lead wires sealed into said bulb and connected, one to said conductive surface and the other to said conductive layer.

2. An electroluminescent lamp comprising a vitreous bulb sealed free of moisture, a conductive coating formed on the inside surface of said bulb, a layer containing an electroluminescent phosphor formed over said conductive coating, a conductive layer formed over said electroluminescent layer, and a pair of lead Wires sealed into said bulb and connected, one to said conductive coating, and the other to saidconductive layer.

3. An electroluminescent lamp comprising a vitreous bulb, a conductive coating formed on the inside surface of said bulb, a layer of dielectric material containing a dispersion of an electroluminescent phosphor formed over said conductive coating, a conductive layer formed over said electroluminescent layer, a pair of lead wires sealed into said bulb and connected, one to said conductive coating and the other to said conductive layer, and a filling of a dry gas seaied within said bulb.

4. An electroluminescent lamp comprising a vitreous bulb, a conductive coating formed on the inside surface of said bulb, a layer of an electroluminescent phosphor in a dielectric binder adherent to said conductive coating, an insulating layer of a dielectric material adherent to said electroluminescent layer, a conductive layer formed over said insulating layer, a pair of lead wires sealed into said bulb and connected, one to said conductive coating and the other to said conductive layer, and a filling of a dry gas sealed within said bulb.

5. An electroluminescent lamp comprising a vitreous bulb, a conductive coating formed on the inside surface of said bulb, a layer of a zinc sulphide phosphor in an alkyd resin adherent to said conductive coating, an insulating layer of an alkyd resin adherent to said phosphor layer, a conductive layer of evaporated metal adherent to said insulating layer, a pair of lead Wires sealed into said bulb and connected, one to said conductive coating and the other to said conductive layer, and a nlling of a dry gas sealed within said bulb.

References Cited in the tile of this patent UNITED STATES PATENTS Light, by E. C. Payne, E. L. Mager and C. W. Jerome, Illuminating Engineer, November 1950, pp. 688-692.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2103053 *Aug 23, 1937Dec 21, 1937Gen ElectricGaseous electric discharge device
US2211590 *May 25, 1938Aug 13, 1940Gen ElectricGaseous electric discharge lamp device
US2566349 *Jan 28, 1950Sep 4, 1951Sylvania Electric ProdElectroluminescent lamp
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2780746 *Oct 1, 1953Feb 5, 1957Westinghouse Electric CorpIncandescent-electroluminescent lamp
US2880346 *Sep 30, 1954Mar 31, 1959Rca CorpElectroluminescent device
US2967964 *Jun 8, 1956Jan 10, 1961Libbey Owens Ford Glass CoElectroluminescent lamp
US3048732 *Jan 24, 1958Aug 7, 1962Westinghouse Electric CorpElectroluminescent cell
US3089973 *Mar 22, 1961May 14, 1963Rca CorpElectroluminescent device
US3252035 *Feb 25, 1963May 17, 1966Westinghouse Electric CorpElectroluminescent lamp with built-in rearwardly-disposed input terminals
US3351347 *Apr 10, 1964Nov 7, 1967Charles J SmithElectroluminescent game ball
US3458205 *Apr 5, 1965Jul 29, 1969Charles J SmithIlluminable game ball
US3790775 *Nov 19, 1971Feb 5, 1974R RosenblattBody ornament with electroluminescent portion
US3814973 *Sep 5, 1972Jun 4, 1974Duro Test CorpElectric lamps of the vibrating filament type having a conductive coating
US5730079 *Dec 4, 1996Mar 24, 1998Totty; Kirby R.Electroluminescent light for night fishing
US6246169Nov 12, 1998Jun 12, 2001Molex IncorporatedElectroluminescent lamp and having a flexible dome-shaped substrate
WO1995028597A1 *Apr 18, 1995Oct 26, 1995E-L Holding, Inc.Electroluminescent lamps and methods of manufacture
WO2013023748A1 *Aug 3, 2012Feb 21, 2013Technische Universitšt DresdenOptoelectronic component and method for treating the interior of a hollow body with a liquid
Classifications
U.S. Classification313/512, 427/124, 445/16, 313/291, 445/24, 313/358, 427/66, 427/69, 445/12, 427/427, 473/353, 313/578
International ClassificationH05B33/00
Cooperative ClassificationF21K9/135, H05B33/00, F21Y2105/006
European ClassificationF21K9/135, H05B33/00