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:
Jun. 07, 2016
Filed:
Jun. 05, 2015
Seiko Epson Corporation, Tokyo, JP;
Osamu Saito, Matsumoto, JP;
Yasuaki Morita, Azumino, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A discharge lamp lighting device includes a discharge lamp, a resonant circuit section, a power conversion section, and a control section. The resonant circuit section is connected to the discharge lamp. The power conversion section is adapted to convert direct-current power into alternating-current power and then supply the discharge lamp with the alternating-current power via the resonant circuit section. The control section is adapted to change a frequency of the alternating-current power alternatingly between a first frequency and a second frequency different from the first frequency in a lighting start period until the discharge lamp reaches a stationary lighting state. The control section is adapted to change the first frequency toward a frequency causing a resonance of the resonant circuit in a stepwise manner. The second frequency is lower than the first frequency.