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:
Aug. 11, 1992
Filed:
Jun. 15, 1990
Kimio Osada, Yokosuka, JP;
Takeo Yasuda, Yokohama, JP;
Toshiba Lighting & Technology Corporation, Tokyo, JP;
Abstract
In a fluorescent lamp, a curved discharge path is constituted by a plurality of bulbs and a cap interconnecting end portions of the bulbs. Terminal electrodes are provided at end portions of the bulbs, which are situated at both ends of the discharge path. An intermediate electrode is arranged within the cap. A voltage is applied selectively between the intermediate electrode and the terminal electrodes, thereby selectively enabling the bulbs to emit light. The bulbs may have apertures having different widths and positions. Different types of phosphor layers may be formed on the inner surfaces of the bulbs, thereby selectively emitting light of different wavelengths.