Fluorescent lamp having a longitudinal stripe of phosphor on out

Details Fluorescent lamp having a longitudinal stripe of phosphor on out Fluorescent lamp having a longitudinal stripe of phosphor on out

1977-06-14

1978-07-04

Demeo, Palmer C.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313113, 313493, H01J 6135, H01J 6148

Patent

active

040990907

ABSTRACT:
Luminescent material, the performance of which is impaired when directly exposed to the environment of a fluorescent lamp discharge, is carried in the form of a longitudinally disposed stripe on the exterior surface of an elongated fluorescent lamp envelope. Carried over the stripe is a layer of reflective material which can be either specular or diffusing. The exterior luminescent material stripe is selected to convert shorter wavelength radiations generated by the conventional inorganic phosphor material which is coated onto the envelope interior surface into longer wavelength visible radiations. The reflector directs substantially all radiations impinging thereon back through the envelope and the resulting blended radiations provide light suitable for purposes of illumination, with additional desired longer wavelength visible radiations.

REFERENCES:
patent: 2424454 (1947-07-01), Gordon
patent: 3767956 (1973-10-01), Bauer

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