Patent ID: 9385806
Filing Date: 2016-07-05
CPC Classification: H04B,H05B

Claim Text:
1. A visible light communication device, comprising: a variable impedance circuit which has an impedance device and is connected in series with a light source comprising a light-emitting device; a switch circuit which is connected in parallel with the variable impedance circuit and is configured to switch whether to connect the variable impedance circuit to the light source or not; a first controller which is configured to perform ON and OFF control of the switch circuit and thereby to modulate an intensity of an illumination light emitted from the light source to superpose a binary communication signal on the illumination light; an impedance-varying circuit which is connected with the variable impedance circuit and configured to change an impedance of the variable impedance circuit; and a second controller which is configured to control the impedance-varying circuit to change the impedance of the variable impedance circuit, wherein the first and second controllers share a common hardware.