Patent ID: 7902771

Claim:
An apparatus for providing current independently to a series of light emitting diodes of a plurality of series of light-emitting diodes, the apparatus comprising: a power converter couplable to the plurality of series of light-emitting diodes, the power converter to generate a current, the power converter further comprising a first current sensor; a first multiplexer couplable to each series of light-emitting diodes of the plurality of series of light-emitting diodes; a memory to store a plurality of parameters corresponding to the plurality of series of light-emitting diodes; and a controller coupled to the power converter, to the memory and to the first multiplexer, the controller to provide for sequential and separate switching of the current through the first multiplexer to each of the series of light-emitting diodes, of the plurality of series of light-emitting diodes, for a corresponding period of time, the controller further to determine a peak input current through the first current sensor and to predict an output voltage across a selected series of light-emitting diodes using the plurality of parameters stored in memory.