Information communicating method

The information communicating method that can be communicated by plurality of devices includes：Step (SK81), is modulated by the 1st signal to sending object, determines the pattern of brightness change；Step (SK82), according to the pattern of the above-mentioned brightness change determined, the whole for multiple light-emitting components that illuminator has carries out brightness change, thus sends above-mentioned 1st signal in an identical manner；And step (SK83), by being lighted respectively with a brightness value in two mutually different brightness values by above-mentioned multiple light-emitting components, the bright arrangement that brightness is spatially presented of above-mentioned illuminator is being configured with, thus the 2nd signal of sending object is being sent.