Stochastic signal density modulation for optical transducer control
A controller for optical transducers uses stochastic signal density modulation to reduce electromagnetic interference.
1. A lighting controller comprising:
a plurality of outputs, each of the plurality of outputs coupled to a lighting element; and
a plurality of density modulation circuits coupled to the plurality of outputs, wherein an output of each of the density modulation circuits corresponds to a brightness of a corresponding lighting element.
2. A The lighting controller of claim 1 , wherein the plurality of outputs includes:
a first output corresponding to a red lighting element;
a second output corresponding to a blue lighting element; and
a third output corresponding to a green lighting element.
3. A The lighting controller of claim 1 , wherein the plurality of density modulation circuits are implemented by a configurable circuit comprising a plurality of programmable digital blocks.
4. A method for generating a lighting output comprising:
driving a first lighting element with a first density signal;
driving a second lighting element with a second density signal; and
driving a third lighting element with a third density signal,
wherein the first, second, and third density signals are controllable to produce a desired combined wavelength for the lighting output.
5. The method for generating a lighting output of claim 4 , wherein the first, second, and third density signals are determined by a controller circuit in response to a wavelength input and based on a determined combination of density signals corresponding to the wavelength input.