Aperture type fluorescent lamp

Details Aperture type fluorescent lamp Aperture type fluorescent lamp

1997-09-12

1999-05-11

Patel, Ashok

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

313493, 313573, 313607, 313234, 313635, H01J61/00

Patent

active

059030950

ABSTRACT:
There is provided an aperture type fluorescent lamp comprising a tubular bulb, an electrode, and a fluorescent layer formed on an inner surface of said tubular bulb in an axial direction of the tubular bulb, an aperture portion provided in said fluorescent layer along the axial direction of the tubular bulb so as to be made the aperture portion as a radiation portion, wherein said aperture portion comprises an aperture portion fluorescent layer having a thickness smaller than the fluorescent layer of other portions. The fluorescent lamp according to the present invention makes it possible to eliminate nonuniformitiy in illuminance.

REFERENCES:
patent: 4887002 (1989-12-01), Dobashi et al.
patent: 5256935 (1993-10-01), Dobashi et al.
patent: 5514934 (1996-05-01), Matsumoto et al.

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