| 摘要 |
PROBLEM TO BE SOLVED: To use plurality of projectors connected in a cascade manner by performing an authentication operation in one projector.SOLUTION: When a projector 1 operates as a head projector connected in a cascade manner, the projector 1 can be used after performing authentication by authentication means (step S104:Y). When the projector 1 operates as one of the projectors other than the head projector, the projector 1 can be used on receiving use permission information by reception means (step S113:Y). |
