Time division modulation with average current regulation for independent control of arrays of light-emitting diodes
AssigneePoint Somee Limited Liability Company
InventorsAnatoly Shteynberg, Harry Rodriguez
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Abstract
Method and computer-readable medium embodiments provide for sourcing current to a series of light-emitting diodes in a plurality of series of light-emitting diodes. A method comprises generating a current, sequentially and separately switching the current to each of the series of light-emitting diodes in the plurality of series of light-emitting diodes for a corresponding period of time, and predicting an output voltage across a selected series of light-emitting diodes using a plurality of parameters stored in a memory.
Claims17
A method of providing power to a series of light-emitting diodes in a plurality of series of light-emitting diodes, the method comprising:
- generating an input DC current having an average current;
- determining the average current of the input DC current based on a plurality of corresponding input DC currents through the plurality of series of light-emitting diodes;
- determining a total period for switching the input DC current to all of the series of light-emitting diodes in the plurality of series of light-emitting diodes;
- determining a corresponding period of time for switching the input DC current to a selected corresponding series of light-emitting diodes based on a ratio of the corresponding input DC current for the selected corresponding series of light-emitting diodes to the average current;
- and
- sequentially and separately switching the input DC current to each of the series of light-emitting diodes in the plurality of series of light-emitting diodes for the determined corresponding period of time.
Dependencies are inferred from the claim text.