Fluorescent lamp having integral light-filtering means and start

Details Fluorescent lamp having integral light-filtering means and start Fluorescent lamp having integral light-filtering means and start

1983-07-13

1985-02-19

Anderson, Bruce C.

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313489, H01J 162

Patent

active

045008108

ABSTRACT:
Reliable starting of a fluorescent lamp that is designed to emit light of a selected color (red, for example) is achieved by using a thin transparent coating of conductive material (such as tin oxide) on the inner surface of the glass envelope in combination with a first overlying layer of a suitable light-filtering pigment material and a second overlying layer of a suitable phosphor. The resulting multi-layered arrangement of such materials and the phosphor eliminates the need for including additives (such as admixed silica and barium sulfate) in the phosphor coating as starting aids and solves the problems of poor light output and unreliable starting which are created by the use of such additives. Multiple layers of pigment material having the proper coating density can also be used.

REFERENCES:
patent: 2299720 (1942-10-01), Holman
patent: 2692349 (1954-10-01), Ouweltjes
patent: 2733371 (1956-01-01), Campbell
patent: 2838707 (1958-06-01), Schwing et al.
patent: 3377494 (1968-04-01), Repsher
patent: 3541376 (1970-11-01), Sadoski et al.
patent: 3624444 (1971-11-01), Berthold
patent: 3875454 (1975-04-01), Van Der Wolf et al.
patent: 4129802 (1978-12-01), Vrenken et al.

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