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:
Apr. 04, 2006
Filed:
Nov. 17, 2004
Yoshikazu Suzuki, Yokohama, JP;
Katumi Sugaya, Takasago, JP;
Tomoyoshi Arimoto, Tatuno, JP;
Ushiodenki Kabushiki Kaisha, Tokyo, JP;
Abstract
To positionally stabilize the arc spot and to prevent the formation of so-called flicker, a super-high pressure discharge lamp which is filled with greater than or equal to 0.20 mg/mmof mercury has a feed device which supplies an alternating current with a steady-state operating frequency of from 60 Hz to 1000 Hz and a low frequency of from 5 Hz to 50 Hz. The feed device inserts the alternating current with the low frequency into the alternating current with the steady-state operating frequency with a time interval which has a length equal to at least one half period and at most to five periods, and the time interval being in the range of from 0.1 sec to 120 sec.