| 摘要 |
PROBLEM TO BE SOLVED: To prevent a computer side from failing to obtain necessary information by making a display device capable of communicating with a computer request the initialization of communication when the communication is switched when a computer to be connected is selected out of a plurality of computers. SOLUTION: A 2nd two-way communication means is provided and a switching preparation period is set in advance through its communication and after switching, a computer which is newly connected is made to initialize the communication.
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