| 摘要 |
<P>PROBLEM TO BE SOLVED: To accurately detect the presence/absence of a video cable connected to a connector, and to accurately suppress the external output of a video signal. <P>SOLUTION: An identification terminal voltage detection circuit 13 is configured to detect the voltage of an identification terminal. A video switch is inserted into a signal line connecting a video circuit 51 included in an internal circuit with the identification terminal. A control part 15 is configured to, when a voltage indicating that the video cable has been connected to a connector 20 is detected, and then a voltage indicating that the video cable has been terminated by a specified impedance, turn on a video switch. <P>COPYRIGHT: (C)2013,JPO&INPIT |
