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:
Apr. 01, 2014
Filed:
Oct. 26, 2012
Silicon Works Co., Ltd., Daejeon-si, KR;
So Bong Shin, Daejeon-si, KR;
Wanyuan Qu, Daejeon-si, KR;
Won Ji Lee, Cheonahn-si, KR;
Yong Goo Kim, Daejeon-si, KR;
Ok Hwan Kwon, Daejeon-si, KR;
Gyeong Sik Mun, Daejeon-si, KR;
Young Suk Son, Daejeon-si, KR;
Silicon Works Co., Ltd., Daejeon-Si, KR;
Abstract
The present invention introduces a device and a method for driving an LED with an improved power factor without using a voltage detector having a large amount of area and power consumption. The device for driving an LED includes a power supply unit, an LED array, and a current path select circuit. The LED arrayis connected with the power supply unit in parallel and includes at least one LED string including LED channels LEDto LEDn that are configured of a plurality of LEDs connected in series. The current path select circuit selects a path of current flowing from output terminals of the plurality of LED channels according to voltage levels of each of the output terminals of the plurality of LED channels.