Patent ID: 8760068

Claim:
A system comprising: a first voltage input, second voltage input, and third voltage input; a first voltage generator circuit, coupled to the first voltage input and generating a first voltage output, wherein the first voltage output is at a higher voltage level than the first voltage input; a first current source block comprising a first current source node, coupled to the second end of the first plurality of light emitting diodes; a second current source block comprising a second current source node, coupled to the fourth end of the first plurality of light emitting diodes; a first multiplexing block coupled to the second and third voltage inputs, and a first multiplexing block output is coupled to the first current source block; and a second multiplexing block coupled to the second and third voltage inputs, and a second multiplexing block output is coupled to the second current source block, wherein the voltage output and the first and second current source nodes are configured to be coupled to a plurality of light emitting diodes.