Patent ID: 9326339
Filing Date: 2016-04-26
CPC Classification: H05B

Claim Text:
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.