1. An information communication method of transmitting a signal using a change in luminance, the information communication method comprising: determining a pattern of the change in luminance, by modulating a first signal to be transmitted; and transmitting the first signal by a light emitter changing in luminance according to the determined pattern of the change in luminance; wherein the light emitter has a plurality of areas each of which emits light, and in the transmitting, in the case where light from adjacent areas of the plurality of areas interferes with each other and only one of the plurality of areas changes in luminance according to the determined pattern of the change in luminance, an area located at an edge from among the plurality of areas changes in luminance according to the determined pattern of the change in luminance.