| 摘要 |
PROBLEM TO BE SOLVED: To perform optimum stroboscopic light emission in accordance with a light emission mode by switching an inductance for limiting a light emitting current in accordance with the light emission mode. SOLUTION: A thyristor 13 is set in a cutoff condition in order to make a light emission waveform smooth in the case of flat light emission, and the light emitting current is set so as to flow through both coils 6 and 8. That is, the FP- SP control terminal of a microcomputer 38 is set to Lo, and transistors 21 and 18 are in an off condition, so that a gate on signal is not impressed on the gate of the thyristor 13. The thyristor 13 is set to be in a conductive condition in order to make the light emission waveform steep in the case of flash light emission, so that the light emitting current does not flow in the coil 8. That is, the FP- SP control terminal of the microcomputer 38 is set to Hi, the transistors 21 and 18 are in an on condition, and a bias voltage is impressed on the gate of the thyristor 13 through a resistor 14. |
