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. 15, 2003
Filed:
Dec. 13, 2001
Taihei Kawasaka, Tokyo, JP;
Hidehiko Kinoshita, Tokyo, JP;
Akihiko Iwata, Tokyo, JP;
Takahiro Urakabe, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A discharge lamp lighting device comprises a booster circuit for boosting the voltage of a DC power source in response to the ON-OFF operation of a switching element , a startup discharge circuit for performing the startup discharge of a discharge lamp according to the boosted DC voltage, a voltage detection circuit for detecting the boosted DC voltage, a control circuit for outputting the pulse modulated by pulse width modulation to the switching element , and a control circuit for controlling the pulse output from the control circuit to the switching element to intermittently enabling or disabling the passage thereof.