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:
Mar. 23, 1999
Filed:
Sep. 12, 1997
Toshiyuki Terada, Tokyo, JP;
Kazuaki Kawasaki, Kanagawa-ken, JP;
Stanley Electric Co., Ltd., Tokyo, JP;
Abstract
In the fluorescent lamp of the present invention, a fluorescent layer and a reflection layer are formed on an inner surface of a tubular glass bulb such that the reflection layer is formed between the glass bulb and the fluorescent layer, and the open angle of opening portions formed in the fluorescent layer and the refection layer is made smaller than that formed in the external electrode. Thereby, reflection efficiency is improved, thereby making it possible to increase the amount of light with the same power consumption. Since the independent reflection layer is formed and the external electrode does not need to serve as a reflector, flexibility is given to the setting of the area of the external electrode, whereby power consumption is set freely.