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. 23, 2006
Filed:
May. 30, 2003
Akira Hochi, Nara, JP;
Takeshi Arakawa, Kyoto, JP;
Kiyoshi Hashimotodani, Takatsuki, JP;
Katsushi Seki, Ritto, JP;
Yuuji Omata, Toyonaka, JP;
Yoshihisa Hagiwara, Kobe, JP;
Akira Hochi, Nara, JP;
Takeshi Arakawa, Kyoto, JP;
Kiyoshi Hashimotodani, Takatsuki, JP;
Katsushi Seki, Ritto, JP;
Yuuji Omata, Toyonaka, JP;
Yoshihisa Hagiwara, Kobe, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An electrodeless discharge lamp operating device including a light-transmitting discharge bulb, an induction coil including a coreand a coil, and a ballast circuitfor supplying a high-frequency power to the induction coil. The operating frequency of the ballast circuitis in the range of 80 kHz to 500 kHz, and where the operating frequency of the ballast circuitis f (kHz) and the power input to the discharge bulbis P (W), the rare gas pressure p (Pa) in the discharge bulbsatisfies the relationship of the following expression: (where A, B and C are constants having the following values: A=4.0×10, B=3.5×10and C=6.2), and the power input P to the discharge bulbis 7 W at minimum and 22 W at maximum.