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:
Dec. 07, 2004
Filed:
Nov. 10, 2003
Kenichiro Takahashi, Osaka, JP;
Satoshi Kominami, Osaka, JP;
Koji Miyazaki, Osaka, JP;
Toshiaki Kurachi, Osaka, JP;
Yoko Matsubayashi, Nara, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A discharge lamp operating apparatus or a compact self-ballasted fluorescent lamp includes: an AC/DC conversion unit for converting an alternating voltage phase-controlled by a dimmer into a direct current voltage; a DC/AC conversion unit for converting an output from the AC/DC conversion unit into a high frequency voltage and applying the high frequency voltage to a discharge lamp, whereby the discharge lamp is intermittently operated; and a dimming control unit which generates a dimming instruction signal for driving the DC/AC conversion unit so that the discharge lamp performs an intermittent operation and outputs the dimming instruction signal to the DC/AC conversion unit via a photocoupler , and synchronizes the timings of turn-ON and turn OFF of the phase-controlled voltage with the timings of turn-ON and turn OFF of an operation of the DC/AC conversion unit , respectively.