公开(公告)号：US08841851B2

公开(公告)日：2014-09-23

申请号：US13568515

申请日：2012-08-07

申请人： Janghwan Cho ,  Jeongin Cheon ,  Dohyung Lee

发明人： Janghwan Cho ,  Jeongin Cheon ,  Dohyung Lee

IPC分类号： H05B37/02

CPC分类号： H05B33/0824 ,  H05B33/0815

摘要： A light emitting diode (LED) driving apparatus is disclosed. The LED driving apparatus includes a rectifier for rectifying an alternating current (AC) voltage to supply a ripple voltage, a light emitting unit partitioned into two or more groups, each of the groups including a plurality of LEDs, and a driving controller for selectively driving one or more of the groups of the light emitting unit depending on a level of the ripple voltage, the driving controller driving at least one of the groups of the light emitting unit using current discharged from a capacitor connected with the at least one group when the ripple voltage is lower than an operating voltage of the light emitting unit.

摘要翻译： 公开了一种发光二极管（LED）驱动装置。 LED驱动装置包括：整流器，用于整流交流电（AC）电压以提供纹波电压;发光单元，分为两组或多组，每组包括多个LED;以及驱动控制器，用于选择性驱动 所述发光单元的一组或多组取决于所述纹波电压的电平，所述驱动控制器使用从与所述至少一个组连接的电容器放电的电流驱动所述发光单元的组中的至少一个， 纹波电压低于发光单元的工作电压。