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. 13, 2011
Filed:
Jun. 25, 2008
Bon Ahm Goo, Seoul, KR;
Byoung Own Min, Gyunggi-do, KR;
Young Jin Lee, Seoul, KR;
Chang Woo Ha, Gyunggi-do, KR;
Jeong IN Cheon, Seoul, KR;
Bon Ahm Goo, Seoul, KR;
Byoung Own Min, Gyunggi-do, KR;
Young Jin Lee, Seoul, KR;
Chang Woo Ha, Gyunggi-do, KR;
Jeong In Cheon, Seoul, KR;
Samsung Electro-Mechanics Co., Ltd., Gyunggi-do, KR;
Samsung LED Co., Ltd., Gyunggi-do, KR;
Abstract
A dimming buck type light emitting diode (LED) driving apparatus includes a main switch controlling a driving current flowing into an LED; a current detector detecting a driving current flowing into the LED; a power level determination unit determining a level of the driving power; a dimming capacitor for dimming control; a dimming control unit controlling charging and discharging of the dimming capacitor according to a power level determination signal and an enable signal; a reset circuit unit generating a reset signal according to a detection voltage from the current detector and a voltage of the dimming capacitor; a pulse generation unit generating a pulse signal; and a latch set by the pulse signal of the pulse generation unit and reset by the reset signal of the reset circuit unit to generate a switching signal, and turning on and off the main switch using the switching signal.