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    • 15. 发明授权
    • LED lighting apparatus
    • LED照明装置
    • US09485830B2
    • 2016-11-01
    • US14232778
    • 2012-07-12
    • Keisuke SakaiRintaro TakahashiTakashi Akiyama
    • Keisuke SakaiRintaro TakahashiTakashi Akiyama
    • H05B33/08
    • H05B33/089H05B33/0824H05B33/083
    • When an LED lighting apparatus which is a lighter load than an incandescent lamp or halogen lamp is connected to a dimmer, a malfunction may occur. The invention prevents the occurrence of such malfunction without defeating the purpose of low power consumption of the LED lighting apparatus. More specifically, the LED lighting apparatus includes a rectifier circuit, a light-emitting circuit connected to the rectifier circuit and containing a single or a plurality of LEDs in which current begins to flow when an output voltage of the rectifier circuit exceeds a threshold voltage, and a bypass circuit having a bypass path for making the current flow to the rectifier circuit without passing through the light-emitting circuit, and a detecting unit for detecting the current flowing through the light-emitting circuit, and wherein when the current detected by the detecting unit exceeds a predetermined value, the bypass circuit shuts off the current flowing through the bypass path.
    • 当比白炽灯或卤素灯更轻的负载的LED照明装置连接到调光器时,可能发生故障。 本发明防止了这种故障的发生,而不会消除LED照明装置的低功耗的目的。 更具体地,LED照明装置包括整流电路,连接到整流电路的发光电路,并且当整流器电路的输出电压超过阈值电压时,该发光电路包含电流开始流动的单个或多个LED, 以及旁路电路,具有用于使电流流向整流电路而不通过发光电路的旁路路径;以及检测单元,用于检测流过发光电路的电流,并且其中,当由 检测单元超过预定值时,旁路电路关闭流经旁路的电流。
    • 17. 发明授权
    • LED drive circuit
    • LED驱动电路
    • US08547027B2
    • 2013-10-01
    • US13237572
    • 2011-09-20
    • Takashi AkiyamaRintaro TakahashiHisashi FukasawaRyoichi Watanabe
    • Takashi AkiyamaRintaro TakahashiHisashi FukasawaRyoichi Watanabe
    • H05B37/00
    • H05B33/0809
    • An object of the invention is to provide an LED drive circuit that can suppress the generation of harmonic noise. The LED drive circuit includes a rectifying circuit an LED array, and a current supply circuit which includes a capacitor and a time constant adjusting element, wherein the discharge time constant of the current supply circuit is set longer than the charge time constant of the current supply circuit, and wherein during a period of time when the magnitude of AC commercial power supply voltage is larger than the light emission threshold of the LED array, current to the light-emitting circuit is supplied mostly from the rectifying circuit, and during a period of time when the magnitude of AC commercial power supply voltage is not larger than the light emission threshold of the LED array, current to the light-emitting circuit is supplied from the current supply circuit.
    • 本发明的目的是提供一种可以抑制谐波噪声的产生的LED驱动电路。 LED驱动电路包括LED阵列的整流电路和包括电容器和时间常数调节元件的电流供给电路,其中电流供给电路的放电时间常数被设定为长于电流供给的充电时间常数 并且其中在AC商用电源电压的大小大于LED阵列的发光阈值的时间段期间,到发光电路的电流主要来自整流电路,并且在一段时间 当交流商用电源电压的大小不大于LED阵列的发光阈值时,从电流供给电路供给到发光电路的电流。
    • 20. 发明申请
    • LED DRIVE CIRCUIT
    • LED驱动电路
    • US20120068616A1
    • 2012-03-22
    • US13237572
    • 2011-09-20
    • Takashi AkiyamaRintaro TakahashiHisashi FukasawaRyoichi Watanabe
    • Takashi AkiyamaRintaro TakahashiHisashi FukasawaRyoichi Watanabe
    • H05B37/00
    • H05B33/0809
    • An object of the invention is to provide an LED drive circuit that can suppress the generation of harmonic noise. The LED drive circuit includes a rectifying circuit an LED array, and a current supply circuit which includes a capacitor and a time constant adjusting element, wherein the discharge time constant of the current supply circuit is set longer than the charge time constant of the current supply circuit, and wherein during a period of time when the magnitude of AC commercial power supply voltage is larger than the light emission threshold of the LED array, current to the light-emitting circuit is supplied mostly from the rectifying circuit, and during a period of time when the magnitude of AC commercial power supply voltage is not larger than the light emission threshold of the LED array, current to the light-emitting circuit is supplied from the current supply circuit.
    • 本发明的目的是提供一种可以抑制谐波噪声的产生的LED驱动电路。 LED驱动电路包括LED阵列的整流电路和包括电容器和时间常数调节元件的电流供给电路,其中电流供给电路的放电时间常数被设定为长于电流供给的充电时间常数 并且其中在AC商用电源电压的大小大于LED阵列的发光阈值的时间段期间,到发光电路的电流主要来自整流电路,并且在一段时间 当交流商用电源电压的大小不大于LED阵列的发光阈值时,从电流供给电路供给到发光电路的电流。