| 摘要 |
<p>PURPOSE:To surely attain inter-communication even when one connection line for communication is in use, to allow the controller make available of plural operation keys without increasing number of connection lines and to display operation information of a device main body obtained through communication with the device main body onto a remote control section. CONSTITUTION:A power supply to a remote control section 1 receiving power from a device main body 16 is supplied as two stages of voltage levels through power supply connection lines 17a,17c with a control means 9 provided to the device main body 16 and a voltage detection means 1 of the remote control section 6 monitors voltage level information and the remote control section 6 controls the control means 9 with a communication control means 9 to an H level with a communication control output means 14 at each transmission to inform the communication state to a transmission destination thereby attaining inter-communication without collision even when only one communication connection line 17b is used.</p> |
