Patent ID: 9705600
Date: 2017-07-11
CPC Classifications: H04B,H05B

Claim:
1. A system for transmitting data via light emitted by a light source, the system comprising: a continuous-time data-signal source for generating a continuous-time data signal, the continuous-time data signal including at least a sinusoidal signal; a driver circuit for generating a drive signal, the drive signal having a drive voltage and a drive current, that provides power to the light source, thereby causing the light source to emit light, wherein variations in the amplitude of the drive signal represent information in the continuous-time data signal; and circuitry for (i) detecting a change in average power delivered to the light source as a result of the variations in the amplitude of the drive signal and for (ii) causing the driver circuit to vary the power delivered to the light source to compensate for the change in average power.