USE OF VERY HIGH FREQUENCY SWITCHING POWER CONVERTERS FOR ALSO MODULATING LIGHT OUTPUT FROM SOLID STATE EMITTER TO COMMUNICATE DATA

摘要

An example of a power and modulation circuit utilizes a very high frequency switching power converter to supply drive current power to cause a solid state light source to emit light. The power converter is configured to convert power from a power source to direct current to supply via the output to the light source, at least in part by a switching function of the power converter at a very high frequency rate. The circuit, in such an example, also includes a control circuit coupled to be responsive to input data and control operation of the power converter so that the current output to drive the light source modulates the light emitted from the light source to also carry the input data.

主权项

1. A device, comprising:
a solid state light emitting source; a very high frequency switching power converter, having an output connected to supply current to drive the solid state light emitting source to emit light and being configured to be coupled to a source of power, the power converter being further configured to convert power from the source of power to direct current to supply via the output to the solid state light emitting source, at least in part by a switching function of the power converter at a very high frequency rate; and a control circuit coupled to be responsive to input data and to the power converter, to control at least one parameter of operation of the very high frequency power converter and thus current output from the power converter to drive the solid state light emitting source, to switch the current output to drive the solid state light emitting source at a frequency of at least 50 MHz and to modulate switched light output from the solid state light emitting source to carry the input data at a rate of up to at least 10 Mbps for light-based over-the-air data communication.