INFRARED RAY COMMUNICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To easily prevent a communication error even when the height of a light emitting element of a device and the height of a photodetector of other device for infrared ray communication differ from each other. SOLUTION: A photodetector 11 and/or light emitting element 12 are provided to a device PR whose total height is increased by the extension of an ancillary part 31 in a way that an infrared ray from a selected direction among a plurality of directions is received and/or an infrared ray is emitted in one direction selected among a plurality of directions. On the other hand, the ancillary part 31 is provided with an infrared ray guide section 40 that guides the infrared ray from the light emitting element of the other device PC to the photodetector 11 and/or the infrared ray from the light emitting element 12 is guided toward the light emitting element of the other device PC.