LED LAMP, POWER-LINE NETWORK SYSTEM, WRITING METHOD FOR LOCATION INFORMATION, PROJECTOR, DATA PROCESSING METHOD AND COLLISION AVOIDANCE SYSTEM

摘要

The objective of the present invention is to easily implement of the transmitting function of location information for an LED lamp. An LED lamp acquires location information of the LED lamp from the outside through a power-line of the LED lamp communication section and stores the acquired location information in nonvolatile storage device. A communication control section, which performs visible light communication, uses visible light to transmit, at a predetermined timing, the location information read from a location information storage area in the nonvolatile storage device. A writing method for location information includes the steps of: causing a server device coupled to a power-line network to provide a database in which the ID of the LED lamp is associated with the location information; causing the server device to receive a location information writing request transmitted from the LED lamp; searching the database to retrieve the location information associated with the requesting LED lamp; transmitting the retrieved location information to the power-line network; and causing the requesting LED lamp to write the location information into the nonvolatile storage method.