Patent ID: 8188679

Claim:
An electronic system comprising a plurality of LEDs connected in series, wherein: the series is divided into multiple segments; each specific one of the segments comprises: a series connection of one or more of the LEDs between first and second nodes of a current path of the specific segment; a bypass-switch connected between the first and second nodes and in parallel with the one or more LEDs; a driver for controlling the bypass-switch, the driver having first and second supply terminals; a capacitance connected between the first and second supply terminals; wherein power supply of the driver is locally generated from the current path within the specific segment; and wherein the local power supply is embodied with a gating element for supply of a current to the capacitance the gating element is connected between the current path and the capacitance; and the gating element is operative to generate for the driver a power supply at the capacitance that is derived from a forward-voltage of the one or more LEDs.