Patent ID: 8907569
Filing Date: 2014-12-09
Classification: H05B

Abstract:
1. A lighting device for an AC power supply comprising: at least two lighting groups, wherein each lighting group comprises a group input, a group output and at least one LED, wherein the at least one LED is arranged between the group input and the group output, wherein the lighting groups are connected to one another in series, wherein each of the at least two lighting groups comprises a bypass arrangement, wherein said bypass arrangement comprises a switchable bypass, the switchable bypass being arranged in parallel with all the LEDs in each lighting group between the group input and the group output, and said bypass arrangement being configured to activate and bypass when an applied voltage is less than a cutoff voltage, and to deactivate the bypass when an applied voltage is greater than the cutoff voltage, at least one current-limiting arrangement connected in series with the at least two lighting groups and/or with the AC power supply, wherein the current-limiting arrangement comprises a constant current source, wherein the current flow is carried through the constant current source in-phase with the AC power supply.