Patent ID: 8536801
Filing Date: 2013-09-17
Classification: H05B

Abstract:
1. An apparatus for powering a lighting device, the apparatus comprising: a controller including a processor, a communications module, an internal clock oscillator, a counter, and one or more non-transient machine-readable memory media having program instructions residing thereon, the instructions executable to cause the processor to receive external control signals associated with individual desired light intensity levels for a blue color LED, a red color LED and a green color LED associated with each of one or more arrays of light-emitting diodes in the lighting device; store the desired light intensity levels as desired output level data in the memory media; generate pulse density modulated output values for each of the received external control signals using a carry overflow logic circuit; and write the generated output values to output terminals in the communications module associated with the respective lighting elements in the lighting device, the one or more memory media further comprising random-access memory media having a plurality of bytes allocated for each color LED, one of the bytes allocated for the desired output level data and one of the bytes allocated for an error accumulator.