公开(公告)号：US20130106292A1

公开(公告)日：2013-05-02

申请号：US13662168

申请日：2012-10-26

Applicant: LG INNOTEK CO., LTD.

Inventor： Gwan Bon KOO ,  Dong Keun YOON ,  Jong Hyun LEE ,  Jin Woo LEE ,  Jae Beom CHO ,  Ji Woong JO

IPC: H05B37/02

CPC classification number: H05B33/0815 ,  H05B33/0887 ,  Y02B20/341

Abstract: Disclosed is an LED protection circuit using a one-shot vibrator. The LED protection circuit includes an LED module; an LED load-open detection circuit for detecting a voltage applied to the LED module to vary a reference potential; a latch circuit for maintaining a latch state according to the reference potential of the LED load-open detection circuit; a current limit circuit for receiving an output signal from the latch circuit to output a first signal; an LED load connection detection circuit for varying the reference potential through the first signal to output a second signal; a trigger input circuit connected to the LED load connection detection circuit for outputting a third signal using the second signal; and a one-shot vibrator for outputting a fourth signal of a square waveform during a predetermined time when the third signal is input.

Abstract translation: 公开了使用单触发振动器的LED保护电路。 LED保护电路包括LED模块; LED负载开路检测电路，用于检测施加到LED模块的电压以改变参考电位; 锁存电路，用于根据LED负载开路检测电路的参考电位保持锁存状态; 电流限制电路，用于接收来自锁存电路的输出信号以输出第一信号; LED负载连接检测电路，用于通过第一信号改变参考电位以输出第二信号; 连接到所述LED负载连接检测电路的触发输入电路，用于使用所述第二信号输出第三信号; 以及单次振动器，用于在输入第三信号的预定时间期间输出方波的第四信号。