Fluorescent lamp having double phosphor layer

Details Fluorescent lamp having double phosphor layer Fluorescent lamp having double phosphor layer

1979-06-11

1984-02-14

Demeo, Palmer C.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

H01J 6148

Patent

active

044319410

ABSTRACT:
A fluorescent lamp has two phosphor layers, the phosphor of the first layer being less expensive than the phosphor of the second layer. The second phosphor layer improves the lamp efficiency.

REFERENCES:
patent: 3602757 (1971-08-01), Wachtel
patent: 3602758 (1971-08-01), Thornton et al.
patent: 4088923 (1978-05-01), Manders

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