| 摘要 |
A wireless utility program 11 of a PDA 1 transmits image data to a wireless projector 2 by wireless communication. When the screen image data has not changed, the transmission of data is not performed. The wireless utility program 11 of the PDA 1 automatically transmits updated screen image data to the wireless projector 2 by wireless communication whenever the screen image data of PDA 1 is updated without the explicit instruction for performing transmission process of the screen image data by user.
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