Patent ID: 9408266
Filing Date: 2016-08-02
CPC Classification: H05B,Y02B

Claim Text:
1. A circuit for controlling a plurality of LEDs coupled in series, the circuit comprising: a switching converter operable as a current source to be coupled to the plurality of LEDs to provide a controlled load current thereto, the switching converter including an inductor to be continuously connected in series with the plurality of LEDs such that when the LEDs are coupled the same load current flows through the inductor and the plurality of LEDs; a plurality of floating driver circuits, each floating driver circuit configured to be coupled in parallel to a respective individual LED of the plurality of LEDs, and configured to bypass at least a portion of the load current of the respective individual LED in accordance with a respective modulated input signal; and a modulator for each floating driver circuit, each modulator configured to be coupled to an I/O interface.