LED lighting device with control means and method for operating the LED lighting device

摘要

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.

主权项

1. An LED lighting device for AC voltage supply, the device comprising:
a plurality of LEDs forming a whole chain, wherein the plurality of LEDs are divided into a plurality of LED part groups, wherein a supply voltage with changing amplitude is presented in the LED lighting device, the whole chain comprising a plurality of LED strands, wherein each LED strand is formed by a plurality of said LED part groups that are arranged in series with respect to each other; shorting links, each configured to bridge a respective LED part group of a respective LED strand; and a control means, wherein the control means is configured to control the shorting links to place each of the plurality of LED strands in at least two switch states, wherein the through voltage of each strand is different when said LED strand is in the switch states, respectively wherein the plurality of LED strands are switched electrically parallel with respect to each other; and wherein at least one of the LED strands comprises an accumulative switching means, wherein the accumulative switching means is electrically switched in series with the respective LED part groups of said at least one LED strand.