Abstract:
Apparatus including a light emitting diode; a constant current source for driving the diode; modulation circuitry for modulating the current supplied to the light emitting diode so that digital information can be carried on light from the diode; and a filtering circuit between the constant current source and the light emitting diode to minimize the effect of LED modulation on the current source. Alternatively, the constant current source can supply current to the diode or to one of a power dissipating element or power storage element. A method for powering a light emitting diode includes using a constant current source; and modulating the current supplied by the constant current source at a frequency for transmitting digital data on light produced. In the alternative, a method can also include diverting current from the constant current source away from the light emitting diode, when the light emitting diode is not emitting light.
Abstract:
An adapter for connection between a luminaire and a power input for powering the luminaire comprises circuitry for modulating light output of the luminaire to contain information, or circuitry for connection to a network so that signals associated with the luminaire are communicated on the network. The adapter is placed between the luminaire and a power input for the luminaire. Methods are provided for registering and establishing communication between a gateway device and a management platform, and for registering a luminaire device with the gateway so that it can be managed by the management platform. Portions of the larger system that constitutes the remote controlled lighting system are also described, including connected wall switches, sensors, and the gateways themselves.