Electrodeless lamp with external insulative coating

Details Electrodeless lamp with external insulative coating Electrodeless lamp with external insulative coating

1996-05-31

1998-01-13

Pascal, Robert

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Induction-type discharge device load

315344, 315 85, 313573, H05B 4116

Patent

active

057083312

ABSTRACT:
An electrodeless, low pressure gas discharge lamp includes a vitreous envelope containing a discharge medium and being shaped with an external chamber for receiving an electrical excitation circuit. The excitation circuit is effective for exciting the discharge medium to emit light with electromagnetic fields that are generated by the excitation circuit. A circuit is included for supplying electrical power from power mains to the excitation circuit. A transparent, electrically conductive coating is provided atop the vitreous envelope and is electrically connected substantially directly to one of the power mains at any given time. A transparent, electrically insulative coating is disposed atop the electrically conductive coating, and comprises a contiguous, inorganic glass layer. The insulative coating preferably has a minimum coating thickness of at least about 3.1 microns.

REFERENCES:
patent: 4010400 (1977-03-01), Hollister
patent: 4266167 (1981-05-01), Proud et al.
patent: 4727294 (1988-02-01), Houkes et al.
patent: 4922157 (1990-05-01), Van Engel et al.
patent: 5239238 (1993-08-01), Bergervoet et al.
patent: 5412280 (1995-05-01), Scott et al.
(Advertisement), "Incandescent Lamps--General Electric," published by General Electric Company (1977), cover page and page 11.

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