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1. 发明授权

US08952624B2 Light emitting diode lighting system 有权
标题翻译：发光二极管照明系统
公开(公告)号：US08952624B2
公开(公告)日：2015-02-10
申请号：US14000863
申请日：2011-10-10
申请人： Young Jong Kim , Dong Young Huh , Taek Soo Kim , Hyun Shik Kim
发明人： Young Jong Kim , Dong Young Huh , Taek Soo Kim , Hyun Shik Kim
IPC分类号： H05B41/16
CPC分类号： H05B33/0815 , H05B33/0851 , Y02B20/347 , Y02B20/348
摘要： An LED lighting system is provided. The LED lighting system includes a main transformer, a voltage detector, a current controller, a second reference voltage supplier, and a power factor compensation circuit. The main transformer transforms an input signal to supply the transformed input signal to an LED group. The voltage detector supplies a control voltage proportional to a level of an input voltage corresponding to the input signal. The current controller includes a first voltage storage, a negative voltage applier, a second voltage storage, switch, and a current control signal generator. The first voltage storage stores the control voltage supplied from the voltage detector or discharges a stored voltage. The negative voltage applier is connected to the first voltage storage, and connected to a ground to apply the control voltage to the ground when the control voltage is a negative voltage. The second voltage storage is connected to the first voltage storage, and stores the control voltage applied through the first voltage storage or discharges a stored voltage. The switch is connected to the second voltage storage, and activated by a driving signal to apply a ground voltage to the second voltage storage. The current control signal generator generates a current control signal according to a voltage signal and gain of the second voltage storage. The first voltage storage or the second voltage storage supplies the current control signal through the voltage detector. The second reference voltage supplier supplies the second reference voltage when the control signal supplied from the voltage detector is equal to or greater than the second reference voltage. The power factor compensation circuit controls a duty ratio of the driving signal according to a level of the current control signal, and controls a peak value of a primary current in the main transformer according to a level of the second reference voltage.
摘要翻译：提供LED照明系统。 LED照明系统包括主变压器，电压检测器，电流控制器，第二参考电压供应器和功率因数补偿电路。主变压器转换输入信号以将变换的输入信号提供给LED组。电压检测器提供与对应于输入信号的输入电压的电平成比例的控制电压。电流控制器包括第一电压存储器，负电压施加器，第二电压存储器，开关和电流控制信号发生器。第一电压存储器存储从电压检测器提供的控制电压或放电所存储的电压。负电压施加器连接到第一电压存储器，并且当控制电压为负电压时，连接到地面以将控制电压施加到地。第二电压存储器连接到第一电压存储器，并且存储通过第一电压存储器施加的控制电压或放电存储的电压。开关连接到第二电压存储器，并由驱动信号激活，以将接地电压施加到第二电压存储器。电流控制信号发生器根据电压信号和第二电压存储器的增益产生电流控制信号。第一电压存储器或第二电压存储器通过电压检测器提供电流控制信号。当从电压检测器提供的控制信号等于或大于第二参考电压时，第二参考电压供应器提供第二参考电压。功率因数补偿电路根据电流控制信号的电平来控制驱动信号的占空比，并且根据第二参考电压的电平来控制主变压器中的初级电流的峰值。

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