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:
Feb. 29, 2000
Filed:
Oct. 01, 1997
Mitsunari Yoshida, Kanagawa-ken, JP;
Toshiyuki Terada, Tokyo, JP;
Tomonori Abe, Kanagawa-ken, JP;
Kazuaki Kawasaki, Kanagawa-ken, JP;
Stanley Electric Co., Ltd., Tokyo, JP;
Abstract
There is provided a fluorescent lamp comprising a tubular glass bulb, an internal electrode provided at the center of the tubular glass bulb, a fluorescent layer formed on an inner surface of the tubular bulb, and an external electrode provided on an outer surface of the tubular glass bulb, said tubular glass bulb being charged with a rare gas containing xenon as a main ingredient, wherein the charged pressure of the rare gas is 100 to 300 torr, the inner diameter of the tubular glass bulb is 4 to 12 mm and the thickness of the tubular glass bulb is 0.4 to 1.2 mm. As a result, lighting voltage is greatly reduced, whereby the charged pressure of the rare gas can be increased, thereby making it possible to improve illuminance.