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:
Sep. 11, 2018
Filed:
Mar. 04, 2016
Seiko Epson Corporation, Tokyo, JP;
Masaru Kono, Shiojiri, JP;
SEIKO EPSON CORPORATION, Tokyo, JP;
Abstract
A discharge lamp driving device includes a discharge lamp driving unit; and a control unit, in which the control unit controls the discharge lamp driving unit so that a first driving current which causes a first electrode to serve as an anode and a second driving current which causes a second electrode to serve as an anode are alternately supplied to the discharge lamp, a period of the first driving current is changed according to a periodic first pattern, and a period of the second driving current is changed according to a periodic second pattern, in which the first pattern and the second pattern are patterns in which the length of the periods over which the respective driving current is supplied decrease over time within each cycle of the pattern, and in which the cycle of the first pattern is phase-shifted relative to the cycle of the second pattern.