Electric lamp and discharge devices – With luminescent solid or liquid material – With gaseous discharge medium
Patent
1996-01-26
1998-10-20
O'Shea, Sandra L.
Electric lamp and discharge devices
With luminescent solid or liquid material
With gaseous discharge medium
313487, 313489, 313572, 313573, 315326, H01J 6116
Patent
active
058251251
ABSTRACT:
A lighting unit includes a discharge vessel having a wall provided with a first luminescent layer, a gas fill consisting essentially of neon at a pressure less than 30 mbar, and a means for providing a constant DC current for exciting the fill in the discharge vessel to emit UV light for exciting the luminescent layer. DC operation offers substantially higher luminous flux over AC operation. The lighting unit may further include a housing having a reflective surface, a second luminescent layer, and a filter incorporated within the discharge vessel.
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patent: 5159237 (1992-10-01), Ishikawa et al.
patent: 5274305 (1993-12-01), Bouchard
patent: 5523655 (1996-06-01), Jennato et al.
De Man Rolf E.
Ligthart Franciscus A. S.
Roozekrans Christianus J.
Van Der Voort Dick
Day Michael
Faller F. Brice
O'Shea Sandra L.
U.S. Philips Corporation
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