A visible light communication apparatus enables an operator to visually recognize a communication state during visual light communication. The apparatus includes a light emitting section which emits visible light and which includes a modulator, a visible light emitter, a light emitting element and an...http://www.google.com.au/patents/US8019229?utm_source=gb-gplus-sharePatent US8019229 - Apparatus, system, method, and program for visible light communication
