Fluorescent lamp having ultraviolet reflecting layer

Details Fluorescent lamp having ultraviolet reflecting layer Fluorescent lamp having ultraviolet reflecting layer

1995-08-28

1997-02-11

Arana, Louis M.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313486, H01J 162, H01J 6304

Patent

active

056024444

ABSTRACT:
A fluorescent lamp with an ultraviolet reflecting barrier layer between the glass envelope and the phosphor layer(s). The barrier layer is a blend of gamma alumina and alpha alumina, preferably 5-80 weight percent gamma alumina and 20-95 weight percent alpha alumina. The barrier layer is effective to reflect UV light back into the phosphor layer(s), leading to improved phosphor utilization and more efficient production of visible light.

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patent: 5402036 (1995-03-01), Ito
patent: 5512798 (1996-04-01), Honda

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