Patent ID: 9413458
Filing Date: 2016-08-09
CPC Classification: H04B

Claim Text:
1. An illumination light communication apparatus which superimposes a communication signal onto illumination light by modulating a light intensity of the illumination light, the illumination light communication apparatus comprising: a light source including a solid-state light-emitting element; a power supply circuit which adjusts illumination light of the light source by controlling a load current flowing into the light source; a switch which modulates an output current supplied from the power supply circuit to the light source; a visible light communication signal circuit which controls ON and OFF of the switch to output a modulating signal for superimposing a visible light beacon signal including a unique ID onto the illumination light emitted from the light source; a control power supply circuit which supplies power to the visible light communication signal circuit; a wireless transmitter which transmits a radio wave beacon signal including a unique ID; a radio wave beacon controller which controls the radio wave beacon signal transmitted from the wireless transmitter, and a power storage connected between the visible light communication signal circuit and the radio wave beacon controller, wherein the radio wave beacon controller is supplied with power from the control power supply circuit, and wherein when the light source is off, the wireless transmitter is supplied with driving power from the power storage and transmits the radio wave beacon signal.