The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 11, 1999
Filed:
Sep. 12, 1997
Mitsunari Yoshida, Kanagawa-ken, JP;
Tomonori Abe, Kanagawa-ken, JP;
Toshiyuki Terada, Tokyo, JP;
Kazuaki Kawasaki, Kanagawa-ken, JP;
Stanley Electric Co., Ltd., Tokyo, JP;
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.