Invention Grant
US09326339B2 LED lighting device with control means and method for operating the LED lighting device 有权
LED照明装置具有操作LED照明装置的控制装置和方法

LED lighting device with control means and method for operating the LED lighting device
Abstract:
An LED lighting device for AC voltage supply is provided. The device has LEDs that are divided into multiple LED part groups. A supply voltage is provided to the device. The LED part groups provides a plurality of LED strands each formed by a certain number of LED part groups arranged in series with each other. The device has shorting links each for bridging one of the LED part groups in an LED strand. The device also has a control means for controlling the shorting links to place the LED strands in at least two switch states. The through voltages of the LED strands are different, when the LED strands are in the switch states, respectively.
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