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. 21, 1996
Filed:
Dec. 13, 1993
Shin Ukegawa, Osaka, JP;
Shigeaki Wada, Osaka, JP;
Atsunori Okada, Osaka, JP;
Shingo Higashisaka, Osaka, JP;
Miki Kotani, Osaka, JP;
Motohiro Saimi, Osaka, JP;
Taku Sumitomo, Osaka, JP;
Osamu Kuramitu, Osaka, JP;
Shinichi Aoki, Osaka, JP;
Matsushita Electric Works, Ltd., Osaka, JP;
Abstract
An electrodeless discharge lamp includes a discharge gas sealed in a lamp tube. The discharge gas includes a halide of rare earth metal. An auxiliary electrode is disposed on or adjacent to an outer periphery wall of the lamp tube such that the auxiliary electrode is capacitively coupled to an interior space of the lamp tube. A main induction coil is wound around the lamp tube and receives power from a first high frequency power source. The auxiliary electrode receives power from a second high frequency power source. In operation, the electrodeless discharge lamp attains smooth lighting upon starting or restarting.