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. 04, 2012
Filed:
Aug. 11, 2009
Yasuhiro Maruyama, Osaka, JP;
Hiroyuki Shoji, Osaka, JP;
Mitsuru Mariyama, Osaka, JP;
Masakazu Ikeda, Osaka, JP;
Hirohisa Warita, Osaka, JP;
Katsumi Inaba, Osaka, JP;
Naoki Fukunaga, Osaka, JP;
Yasuhiro Maruyama, Osaka, JP;
Hiroyuki Shoji, Osaka, JP;
Mitsuru Mariyama, Osaka, JP;
Masakazu Ikeda, Osaka, JP;
Hirohisa Warita, Osaka, JP;
Katsumi Inaba, Osaka, JP;
Naoki Fukunaga, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
An LED drive circuit is an LED dive circuit that receives an alternating voltage to drive an LED, and includes a current remove portion that removes a current from a current supply line that supplies an LED drive current to the LED. If an input current to the LED drive circuit is an unnecessary current, the LED does not light because of current removal by the current remove portion. If the input current to the LED drive circuit turns into the LED drive current from the unnecessary current, the current remove portion decreases the amount of current removed.