| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problems wherein an external apparatus control device of a projector device can only output, for example, can be used only for development/storage of a screen, and has a narrow application range, and further, since the kind of an external circuit to be connected by a user is unknown, the projector device sometimes becomes unsafe according to a connected circuit. <P>SOLUTION: A constitution is adopted so that a control signal input circuit constituted of an A/D converter 13 and a microcomputer 11 is provided on the external apparatus control device, and that operation of the projector device 100 can be controlled by an external apparatus. Further, a constitution is adopted so that, when outputting an external apparatus control signal, the state of an external apparatus control output signal is monitored by utilizing the control signal input circuit, and output of the external apparatus control output signal is stopped at an abnormal time. <P>COPYRIGHT: (C)2011,JPO&INPIT |
