| 摘要 |
PROBLEM TO BE SOLVED: To realize a light source driving device capable of always increasing the speed of the rise of output of a semiconductor light source with a simple configuration.SOLUTION: A laser diode driving device 1 comprises a variable DC power source 3 configured to output a voltage for driving laser diodes LD1 to LDn, a current driving element 4 configured to cause a current If to flow, a current controller 5 configured to control the ON/OFF state of the current driving element 4 and the magnitude of the current If, and a power source controller 7 configured to control the output voltage of the variable DC power source 3. The power source controller 7 controls the output voltage of the variable DC power source 3 based on If-Vf characteristic data D2, voltage drop characteristic data D3, and Vds setting data D4 stored in a memory unit 8 so that the voltage between the terminals of the current driving element 4 is constant regardless of the magnitude of the current If. |
