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. 01, 2005
Filed:
Aug. 01, 2003
Akio Ishizuka, Yokohama, JP;
Shigehisa Kawatsuru, Yokosuka, JP;
Akio Ishizuka, Yokohama, JP;
Shigehisa Kawatsuru, Yokosuka, JP;
Harison Toshiba Lighting Corp., Imabari, JP;
Abstract
A high pressure discharge lamp starter device comprises a starter circuit OC and control element CC. The starter circuit OC is capable of starting up an essentially mercury free high-pressure discharge lamp HPL containing a rare gas and a metal halide. The control element CC controls the starter circuit OC to start up the high pressure discharge lamp HPL, supply a lamp power larger than twice a rated lamp power, reduce lamp power such that light output is not significantly larger compared to that during a stable light emission time and the light output does not rapidly increase, when a metal halide charged in the high pressure discharge lamp HPL is abruptly vaporized, thereafter, gradually reduce the lamp power so as to settle the rated lamp power.