Electric lamp and discharge devices – With luminescent solid or liquid material – With gaseous discharge medium
Patent
1986-07-08
1988-02-23
Moore, David K.
Electric lamp and discharge devices
With luminescent solid or liquid material
With gaseous discharge medium
2523014R, H01J 6146
Patent
active
047272830
ABSTRACT:
A low-pressure mercury vapor discharge lamp with a luminescent layer whose emission mainly lies in three spectral ranges and whose loading amounts to at least 500 W per m.sup.2 surface area of the luminescent layer, is characterized by having an absorption layer of a luminescent aluminate activated by trivalent cerium and having a garnet crystal structure. The absorption layer permits the obtaining of low color temperatures (down to 2000 K.).
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deHair Johannes T. W.
Heuvelmans Jean J.
Siebers Gerardus H. M.
ter Vrugt Johannes W.
Van Kemenade Johannes T. C.
Fox John C.
Moore David K.
Powell Mark R.
U.S. Philips Corporation
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