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    • 2. 发明公开
    • Led Lighting Circuit
    • LED-Beleuchtungsschaltung
    • EP2362712A3
    • 2017-01-11
    • EP11153894.8
    • 2011-02-09
    • Panasonic Intellectual Property Management Co., Ltd.
    • Kumada, KazuhiroKuroki, YosifumiMizukawa, Hiromitsu
    • H05B33/08
    • H05B33/089H05B33/0815Y02B20/347
    • [Object] To provide a LED lighting circuit for preventing an increase in an output voltage of a DC/DC converter in an unloaded state even at the time of lighting light-emitting diodes.
      [Means for Settlement] The LED lighting circuit includes a power factor correction circuit PFC for outputting a DC voltage V2, a DC/DC converter 1 for stepping down the DC voltage V2 and generating a DC voltage V3, an LED light source part 2 to be lit by flowing an LED current by the DC voltage V3, a control part 3 for controlling a switching element Q1 so that the LED current is constant, and a power supply part 4 for generating a
      DC voltage V5 for driving the control part 3, wherein the power supply part 4 and the LED light source part 2 are connected in series, the LED light source part 2 is connected to a high voltage line of the power factor correction circuit PFC, the power supply part 4 is connected to a low voltage line of the power factor correction circuit PFC, and at least at the time of lighting, the power supply part 4 is supplied with a power source from the power factor correction circuit PFC via the LED light source part 2 to generate the DC voltage V5.
    • 提供即使在点亮发光二极管时,也可以在无负载状态下提供用于防止DC / DC转换器的输出电压增加的LED点亮电路。 [结算手段] LED点亮电路包括用于输出DC电压V2的功率因数校正电路PFC,用于降压直流电压V2并产生直流电压V3的DC / DC转换器1,将LED光源部2〜 通过以直流电压V3流动LED电流来点亮LED电流,用于控制开关元件Q1以控制LED电流恒定的控制部分3以及用于产生用于驱动控制部分3的DC电压V5的电源部分4, 其中电源部分4和LED光源部分2串联连接,LED光源部分2连接到功率因数校正电路PFC的高电压线,电源部分4连接到低电压 功率因数校正电路PFC的线路,并且至少在点亮时,通过LED光源部分2从功率因数校正电路PFC向电源部分4提供电源,以产生直流电压V5。
    • 3. 发明公开
    • LED lighting device
    • LED照明设备
    • EP2364064A3
    • 2015-10-21
    • EP11156066.0
    • 2011-02-25
    • Panasonic Intellectual Property Management Co., Ltd.
    • Mizukawa, HiromitsuKuroki, YosifumiKumada, Kazuhiro
    • H05B33/08
    • H05B33/0812H05B33/0845
    • [Object] To provide an LED lighting device capable of suppressing a flicker at an intermediate level in which a dimming level is moved between a high level and a low level.
      [Means for Settlement] The LED lighting device includes a constant current output part 21 capable of variably adjusting an amplitude for supplying a constant current I1 with a fixed amplitude to an LED light-emitting part 4, and a PWM current output part 22 for variably adjusting an on-duty state in a PWM cycle by PWM control and supplying a PWM current with a predetermined on-duty state to the LED light-emitting part 4, wherein in an intermediate dimming range, the constant current output part 21 adjusts the amplitude of the constant current I1 in accordance with a dimming level and the PWM current output part 22 adjusts the on-duty state of the PWM current in accordance with the dimming level, so that the LED light-emitting part 4 is dimmed.
    • 本发明的目的在于提供一种能够抑制在调光电平在高电平和低电平之间移动的中间电平的闪烁的LED照明装置。 [用于沉降的手段] LED照明设备包括恒定电流输出部分21和PWM电流输出部分22,该恒定电流输出部分21能够可变地调整用于向LED发光部分4提供具有固定振幅的恒定电流I1的幅度, 通过PWM控制在PWM周期中调整占空比状态,并向LED发光部分4提供具有预定工作状态的PWM电流,其中在中间调光范围中,恒定电流输出部分21调整振幅 ,PWM电流输出部22根据调光等级调整PWM电流的导通占空比状态,使LED发光部4变暗。
    • 5. 发明公开
    • Lighting device and illumination fixture using the same
    • 照明装置和照明装置使用相同的
    • EP2375554A3
    • 2017-05-17
    • EP11161344.4
    • 2011-04-06
    • Panasonic Intellectual Property Management Co., Ltd.
    • Kuroki, YosifumiHiramatu, AkinoriMizukawa, Hiromitsu
    • H02M3/156H02M1/36H05B33/08
    • H02M1/36H02M3/156H05B33/0815H05B33/0821H05B33/0887
    • [Object] To provide a lighting device capable of reliably detecting existence or absence of load connection.
      [Means for Settlement] There are provided a DC-DC converting circuit 1 for converting a DC voltage between input terminals A and B and outputting the DC voltage to between output terminals C and D, a DC current carrying element (resistor R3) connected between the output terminals C and D, a load terminal 3 to which a semiconductor light-emitting element 4 lighted by a DC current supplied from the output terminals C and D is connected, a load connection detecting circuit 2 forming a path for passing the DC current from the input terminals A and B through the load terminal 3 and the semiconductor light-emitting element 4, and a rectifying element (diode D3) connected between the load terminal 3 and the DC current carrying element (resistor R3), the rectifying element blocking a path for passing the DC current from the input terminals A and B to the load connection detecting circuit 2 through the DC current carrying element (resistor R3).
    • 本发明的目的在于提供一种能够可靠地检测有无负载连接的照明装置。 [用于解决的手段]提供了一种DC-DC转换电路1,用于转换输入端A和B之间的DC电压并将DC电压输出到输出端C和D之间,DC电流携带元件(电阻器R3) 输出端子C,D,通过从输出端子C,D供给的直流电流而点亮的半导体发光元件4所连接的负载端子3,形成使直流电流通过的路径的负载连接检测电路2 从输入端子A,B经由负载端子3和半导体发光元件4以及连接在负载端子3和直流电流承载元件(电阻R3)之间的整流元件(二极管D3),整流元件阻断 将来自输入端子A,B的直流电流经由直流电流传输元件(电阻器R3)传递给负载连接检测电路2的路径。