| 摘要 |
PROBLEM TO BE SOLVED: To extend the distance where an infrared ray remote controller operates without modifying an existing device by converting a received infrared ray signal into an electric signal, remodulating this electric signal and emitting infrared ray. SOLUTION: The light emission of the LED of a transmission part 4 is received by a light receiving part 9. This light receiving part 9 converts the pulse modulation signal of received light into the pulse width column signal of an electric signal. Next, an optical repeater part 12 is composed by performing the same pulse modulation as the modulation signal of the transmission part 4 for the pulse width column of the electric signal in a remodulation part 10 again, inputting the signal in the LED 11 which is the same as the LED 3 of the transmission part 4, transmitting the signal as a light emission signal again and retransmitting the signal to a reception part 6. By combining with this optical repeater part 12, the device can be applied to the operation of an outdoor device. Therefore, an infrared ray remote controller which is inexpensive and has sure operability can be obtained and the new use of the device is extended to the field for which the device has not been utilized because the device reaches no more than 10 meters till now. |
