| 摘要 |
PURPOSE:To improve noise resistance by providing a reference signal generating circuit on a receiving side, frequency-dividing a signal, setting it by means of a discriminating signal sent from a transmitting side, and making it into the switching signal of spectacles. CONSTITUTION:A reference signal generating circuit 10 is provided on the receiving side, and the reference signal is divided to be the spectacle switching signal. For this reason, even if a remote control signal cannot be received for a while, the normal operation can be continued. In addition, a gate circuit 12 executes an operation to open a gate for a prescribed short time near timing when a reception discriminating signal from a receiving circuit arrives by a timing signal supplied from a dividing circuit 11. Thus, a noise input, etc., are shut out in a period other than the prescribed short time near the timing of the discrimination signal arrival, and the noise resistance can be improved. |
