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:
Feb. 18, 2014
Filed:
Apr. 16, 2012
Harumi Sakuragi, Tokushima, JP;
Wataru Ogura, Okaya, JP;
Teruo Watanabe, Okaya, JP;
Minoru Kitahara, Okaya, JP;
Harumi Sakuragi, Tokushima, JP;
Wataru Ogura, Okaya, JP;
Teruo Watanabe, Okaya, JP;
Minoru Kitahara, Okaya, JP;
Nichia Corporation, Anan-shi, JP;
Abstract
An LED driving apparatus for suppressing harmonic components is provided. First and fourth portionsandare in parallel to the first and second LEDsand, respectively. The first portioncontrols the current amount in said first LED. The fourth portioncontrols the current amount in said first and second LEDsand. The first and fourth controllersandcontrol the first and fourth portions, respectively. A current detectordetects a signal based on the amount of a current flowing from the first and second LEDsand. A signal providing portionprovides a voltage based on a rectified voltage provided from a rectifying circuit. The first and fourth controllersandcompare the current detection signal with the signal voltage, and control the first and fourth portionsandbased on the comparison.