| 摘要 |
PROBLEM TO BE SOLVED: To provide a driving circuit capable of controlling accurately a deflection angle of a movable plate in an electromagnetic-driven optical scanner. SOLUTION: By the voltage Vin which is outputted from a current amplitude setting part 12 in accordance with the deflection angle which is set by a deflection angle setting part 11, a prescribed DC current is inputted into an H-shape bridge circuit 15 from a current control part 13, is converted into an AC current by a pair of driving signals S1 and S2 from a driving signal generating part 14 and is supplied to a coil of the optical scanner 16. Resistance R for detecting a current transforms the actual current (i) into the voltage Vf and feeds back the same to the current control part 13, which compares the voltages Vin and Vf and controls the DC current in such a manner that Vin=Vf is attained.
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