公开(公告)号：US20150257230A1

公开(公告)日：2015-09-10

申请号：US14604040

申请日：2015-01-23

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Bong-jin LEE ,  Hyun-jung KIM

IPC: H05B33/08

CPC classification number: H05B33/0851 ,  H05B33/0812 ,  H05B33/0815 ,  H05B33/0827 ,  H05B33/0866 ,  H05B33/0872 ,  H05B37/0272 ,  Y02B20/347

Abstract: A light-emitting diode (LED) driver, an LED lighting apparatus, and a method of operating the LED lighting apparatus are provided. The LED driver may include an LED current controller configured to control an LED current, which flows through an LED array including a plurality of LEDs, such that the LED current is maintained at a constant level; a comparer configured to compare a sensing signal, which corresponds to a magnitude of the LED current, and a reference signal, and to obtain a first output signal based on a comparison result; and a dimming controller configured to modify the first output signal to obtain a second output signal for dimming of the plurality of LEDs, and to provide the second output signal to the LED current controller.

Abstract translation: 提供了一种发光二极管（LED）驱动器，LED照明装置和操作LED照明装置的方法。 LED驱动器可以包括LED电流控制器，其被配置为控制流过包括多个LED的LED阵列的LED电流，使得LED电流保持在恒定水平; 配置为比较对应于LED电流的大小的感测信号和参考信号的比较器，并且基于比较结果来获得第一输出信号; 以及调光控制器，其被配置为修改所述第一输出信号以获得用于所述多个LED的调光的第二输出信号，并将所述第二输出信号提供给所述LED电流控制器。