| 摘要 |
A projector includes an interface unit, a control unit, and a projection unit. The interface unit includes a plurality of ports, each of which connects to a corresponding connector to allow the projector to connect to a corresponding signal source. The control unit identifies format of information read from the corresponding signal sources via the interface unit and identifies which port is connected. The projection unit projects a menu image, the menu image comprising a plurality of icons, each associated with a corresponding port and configured for indicating connection states of the corresponding ports.
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