| 摘要 |
PURPOSE:To prevent the reduction of the life of an electrooptical shutter and the degradation in optical characteristic by driving the electrooptical shutter in accordance with the output from a means which fixes the voltage level. CONSTITUTION:A demodulated control signal is given from a demodulating circuit 12 to a clamp pulse generating circuit 15 of a receiving part 7 which receives a control signal to drive an optical shutter device, and a clamp pulse signal is generate. A clamping circuit 13 forcibly sets the inputted control signal of a right shutter 4a to a prescribed level based on the clamp pulse signal, and a clamping circuit 14 sets the control signal of a left shutter 4b to the prescribed level. Driving circuits 16 and 17 alternately drive right and left shutters 4a and 4b to open/close them in accordance with control signals which have DC components removed. |
