Fluorescent lamp with second phosphor layer

Details Fluorescent lamp with second phosphor layer Fluorescent lamp with second phosphor layer

1976-11-08

1978-01-24

Demeo, Palmer C.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

2523014H, H01J 6144, H01J 6148

Patent

active

040705986

ABSTRACT:
A fluorescent lamp having a phosphor layer for converting radiation at a first non-visible wavelength to radiation in the visible spectrum, includes a second phosphor layer for converting other non-visible radiation, having a deleterious effect (depreciation) on the first phosphor layer, to wavelengths in the region containing the first wavelength for subsequent conversion to visible light, thus increasing the brightness of the fluorescent lamp simultaneous with minimization of early depreciation of lamp brightness.

REFERENCES:
patent: 3484381 (1969-12-01), Yale et al.
patent: 3602757 (1971-08-01), Wachtel
patent: 3909657 (1975-09-01), Brown

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