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. 03, 2013
Filed:
Feb. 16, 2011
Joon Youp Sung, Gyeonggi-do, KR;
Jae Shin Lee, Gyeonggi-do, KR;
Seung Kon Kong, Gyeonggi-do, KR;
Jung Sun Kwon, Gyeonggi-do, KR;
Jung Hyun Kim, Gyeonggi-do, KR;
BO Hyun Hwang, Gyeonggi-do, KR;
Joon Youp Sung, Gyeonggi-do, KR;
Jae Shin Lee, Gyeonggi-do, KR;
Seung Kon Kong, Gyeonggi-do, KR;
Jung Sun Kwon, Gyeonggi-do, KR;
Jung Hyun Kim, Gyeonggi-do, KR;
Bo Hyun Hwang, Gyeonggi-do, KR;
Samsung Electro-Mechanics Co., Ltd., Gyunggi-Do, KR;
Abstract
Disclosed herein is a device for controlling current of an LED including a constant current generator, a current mirror, and a current amplifier, the device controlling current of an LED, comprising: a selector outputting an L signal or an H signal according to an input control signal; and a current changing unit formed by connecting at least one switching unit in parallel, the switching unit including a transistor and a switch connected to the transistor in series. The device for controlling current of an LED adjusts current supplied to the current amplifier using a SEL input without an effect of a noise, thereby making it possible to change the current of the LED without separately changing a resistor.