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. 14, 2012
Filed:
Dec. 02, 2009
Seung Kon Kong, Seongnam-si, KR;
BO Hyun Hwang, Seoul, KR;
Jung Hyun Kim, Suwon-si, KR;
Jung Sun Kwon, Suwon-si, KR;
Seung Kon Kong, Seongnam-si, KR;
Bo Hyun Hwang, Seoul, KR;
Jung Hyun Kim, Suwon-si, KR;
Jung Sun Kwon, Suwon-si, KR;
Samsung Electro-Mechanics Co., Ltd., Gyunggi-do, KR;
Abstract
The present invention provides a module for controlling an LED current for selective feedback, an apparatus and a method for driving LEDs using the same. The module for controlling the LED current, which is connected to a plurality of LED channels receiving driving powers supplied from at least one DC/DC converter and controls currents of the LED channels through a constant current, the LED current controlling module includes: an operation mode selector for selecting an operation mode according to an inputted enable signal level; a channel divider for dividing a plurality of LED channels into at least one group according to the selected operation mode; and a minimum voltage selector for selecting an LED channel with a minimum voltage, obtained by comparing voltages detected from each of lower ends of the LED channels included in each of one or more divided groups.