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    • 2. 发明申请
    • LED DRIVE CIRCUIT AND LED ILLUMINATION COMPONENT USING THE SAME
    • LED驱动电路和使用其的LED照明组件
    • US20120049755A1
    • 2012-03-01
    • US13189250
    • 2011-07-22
    • Takayuki SHIMIZUAtsushi KanamoriHirohisa Warita
    • Takayuki SHIMIZUAtsushi KanamoriHirohisa Warita
    • H05B41/36
    • H05B33/0815H05B33/0818Y02B20/347Y02B20/383
    • An LED drive circuit is provided that can be connected to an alternating current power source via a phase-control light controller and drives an LED load. The LED drive circuit includes: a switching power source portion having a switching element, a switching current detection portion that detects a switching current, and an LED current detection portion that detects an LED current; a first subtraction portion that subtracts a given value from an output of the switching current detection portion; a first determination portion that determines, through computation on a plurality of externally inputted voltages, a target value to which the switching current is limited; a second subtraction portion that subtracts a given value from an output of the LED current detection portion; a second determination portion that determines, through computation on a plurality of externally inputted voltages, a target value of the LED current; a switching current limitation portion that, if a result of the subtraction by the first subtraction portion exceeds a result of the determination by the first determination portion, switches off the switching element so as to limit the switching current; and an LED current control portion that drives the switching element to control the LED current so that a result of the subtraction by the second subtraction portion coincides with a result of the determination by the second determination portion.
    • 提供LED驱动电路,其可以经由相位控制光控制器连接到交流电源并驱动LED负载。 LED驱动电路包括:具有开关元件的开关电源部,检测开关电流的开关电流检测部,以及检测LED电流的LED电流检测部; 第一减法部分,从开关电流检测部分的输出中减去给定值; 第一确定部分,通过对多个外部输入的电压进行计算,确定限制了开关电流的目标值; 第二减法部分,从LED电流检测部分的输出中减去给定值; 第二确定部分,通过对多个外部输入电压的计算确定LED电流的目标值; 开关电流限制部,其中,如果由所述第一减法部分减法的结果超过所述第一确定部分的确定结果,则切换所述开关元件以限制所述开关电流; 以及LED电流控制部分,其驱动开关元件来控制LED电流,使得由第二减法部分减法的结果与第二确定部分的确定结果一致。
    • 5. 发明申请
    • LED DRIVER CIRCUIT AND LED LIGHTING DEVICE USING THE SAME
    • LED驱动电路和使用其的LED照明装置
    • US20120043902A1
    • 2012-02-23
    • US13198929
    • 2011-08-05
    • Atsushi KANAMORITakayuki SHIMIZUHirohisa WARITAHiroyuki SHOJI
    • Atsushi KANAMORITakayuki SHIMIZUHirohisa WARITAHiroyuki SHOJI
    • H05B37/02
    • H05B33/0815H02M1/4225H02M3/33523Y02B70/126
    • Provided is an LED driver circuit, to be connected to an AC power supply via a phase-control dimmer, for driving an LED load, including: a switching power supply part including a switching element and a switching current detection part; an LED current detection part; a first control part for controlling and switching the switching element so that a switching current has a desired current value based on a detection signal of the switching current detection part; a second control part for controlling and switching the switching element so that an LED current has a desired current value based on a detection signal of the LED current detection part; and a switch part for switching between control performed by the first control part when the phase-control dimmer is set to high brightness dimming and control performed by the second control part when the phase-control dimmer is set to low brightness dimming.
    • 提供一种LED驱动电路,其经由相位控制调光器连接到AC电源,用于驱动LED负载,包括:开关电源部分,包括开关元件和开关电流检测部分; LED电流检测部分; 第一控制部分,用于基于开关电流检测部分的检测信号来控制和切换开关元件,使得开关电流具有期望的电流值; 第二控制部分,用于基于LED电流检测部分的检测信号来控制和切换开关元件,使得LED电流具有期望的电流值; 以及开关部,用于当相位控制调光器被设置为当相位控制调光器被设置为低亮度调光时由第二控制部分执行的高亮度调光和控制时,切换由第一控制部执行的控制。
    • 6. 发明申请
    • LED DRIVE CIRCUIT, LED ILLUMINATION COMPONENT, LED ILLUMINATION DEVICE, AND LED ILLUMINATION SYSTEM
    • LED驱动电路,LED照明组件,LED照明装置和LED照明系统
    • US20120068617A1
    • 2012-03-22
    • US13217350
    • 2011-08-25
    • Hideo MATSUDAAtsushi KANAMORITakayuki SHIMIZU
    • Hideo MATSUDAAtsushi KANAMORITakayuki SHIMIZU
    • H05B37/02
    • H05B33/0815H05B33/0848
    • An LED drive circuit is provided that is connectable to a phase-control light controller and drives an LED load by use of a voltage obtained by rectifying a phase-controlled alternating current voltage inputted from the phase-control light controller. The LED drive circuit includes: a first phase angle detection portion that detects a phase angle in a present cycle; a second phase angle detection portion that detects a phase angle in a cycle preceding the present cycle by at least one cycle; a bias portion that generates a detection signal by adding a predetermined delay time to a phase angle obtained by averaging the phase angle detected by the first phase angle detection portion and the phase angle detected by the second phase angle detection portion; and a drive portion that starts current supply to the LED load at timing based on the detection signal generated by the bias portion.
    • 提供一种LED驱动电路,其可连接到相位控制光控制器,并且通过使用通过对从相位控制光控制器输入的相控交流电压进行整流而获得的电压来驱动LED负载。 LED驱动电路包括:第一相位角检测部,其检测当前周期中的相位角; 第二相位角检测部分,其在所述当前周期之前的循环中以至少一个周期检测相位角; 偏置部,其通过将由所述第一相位角检测部检测出的相位角求平均化的预定延迟时间与由所述第二相位角检测部检测出的相位角相加而产生检测信号; 以及驱动部,其基于由偏置部生成的检测信号在定时开始向LED负载供电。