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    • 8. 发明授权
    • Solid state light source based lighting device and lighting system
    • 基于固态光源的照明设备和照明系统
    • US08669721B2
    • 2014-03-11
    • US13428655
    • 2012-03-23
    • Koji WatanabeHiromitsu MizukawaNobuo UkitaKazuhiro Nishimoto
    • Koji WatanabeHiromitsu MizukawaNobuo UkitaKazuhiro Nishimoto
    • G05F1/00H05B37/02H05B39/04H05B41/36
    • H05B33/0818H05B33/0851Y02B20/347
    • A lighting device is capable of realizing a stable dimming control in a wide range of light output. The lighting device includes a DC power circuit for providing power to a switching element of the lighting device. A current controller switches the switching element to enable a current to flow from the DC power circuit through a solid state light source and maintain the current from the DC power circuit through the solid state light source current controller at a predetermined current. The current controller includes a first switching controller operable to change a width of an on-pulse provided to the switching element and a second switching controller operable to determine a burst-on time during which the on-pulses determined by the first switching controller are provided to the switching element. The burst-on time is longer than an on-pulse period of the first switching controller.
    • 照明装置能够在宽范围的光输出中实现稳定的调光控制。 照明装置包括用于向照明装置的开关元件提供电力的DC电力电路。 电流控制器切换开关元件以使电流从DC电源电路通过固态光源流动,并且以预定电流保持来自DC电力电路的电流通过固态光源电流控制器。 电流控制器包括可操作以改变提供给开关元件的导通脉冲的宽度的第一开关控制器和可操作以确定提供由第一开关控制器确定的导通脉冲的突发时间的第二开关控制器 到开关元件。 突发时间长于第一开关控制器的导通脉冲周期。