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:
May. 16, 2011
BO Hyun Hwang, Gyeonggi-do, KR;
Jung Sun Kwon, Gyeonggi-do, KR;
Seung Kon Kong, Gyeonggi-do, KR;
Jung Hyun Kim, Gyeonggi-do, KR;
Jae Shin Lee, Gyeonggi-do, KR;
Joon Youp Sung, Gyeonggi-do, KR;
Bo Hyun Hwang, Gyeonggi-do, KR;
Jung Sun Kwon, Gyeonggi-do, KR;
Seung Kon Kong, Gyeonggi-do, KR;
Jung Hyun Kim, Gyeonggi-do, KR;
Jae Shin Lee, Gyeonggi-do, KR;
Joon Youp Sung, Gyeonggi-do, KR;
Samsung Electro-Mechanics Co., Ltd., Suwon, KR;
Abstract
Disclosed herein is a light emitting diode (LED) driving device for driving a multi-channel LED element or an LED array for each channel, the LED driving device including: a constant current driver driving currents flowing in each channel; and a minimum voltage selector receiving voltage levels of each channel and selecting a minimum voltage level to thereby feedback the selected minimum voltage level to the constant current driver, wherein matching characteristics of currents flowing in each channel is improved and a size of an integrated circuit (IC) chip is also reduced as compared to a case according to the related art, thereby making it possible to reduce a production cost and satisfy the trend of miniaturization of the chip, while solving a performance deterioration problem due to deterioration of the matching of the currents between the channels.