| 摘要 |
PURPOSE:To ease wiring, etc., at an operating part and a load body and raise the operability of a car by performing signal exchange between the switches and an indicators arranged on the front within a car room and load bodies such as a radio, etc., similarly arranged on the back via optical fibers. CONSTITUTION:When an operating switch 1 arranged on, for example, the front instrument part of a car is operated, a prescribed signal is sent via an encoding circuit 3 into the first light emitting circuit 4. Then a light signal is introduced via the first optical fibers 5 into , for example a radio body installed on a rear trunk part. Namely, the first light receiving circuit 6 receives the light signal to output an electric signal to a CPU7, and a receiver block 13 selects a prescribed channel in response to the output of a PLL controller 18. When this is completed, the CPU7 introduces a selected display signal into the second light emitting circuit 8, and a channel is indicated on the indicator 2 via the second optical fiber 9, the second light receiving circuit 10, a decoding circuit 11, and a driving circuit 12. |
