| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent a power supply voltage fed from a 5V power supply line in a display device from being fed to a 5V power supply terminal of an HDMI (high-definition multimedia interface) receiving section when an AV amplifier is in a power-off state and the display device is in a power-on state. <P>SOLUTION: When the AV amplifier is in a power-off state and the display device is in a power-on state, a power supply voltage fed from a 5V power supply line 27 of the display device 20 to a 5V power supply line 17 is prevented from being fed to a 5V power supply terminal of an HDMI-receiving section 11 by turning off a transistor Q1. When the AV amplifier 10 is in a power-on state, the power supply voltage from a power supply circuit of the AV amplifier 10 is permitted to be fed to the 5V power supply terminal of the HDMI-receiving section 11 by turning on the transistor Q1. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
