| 摘要 |
PROBLEM TO BE SOLVED: To equalize the pulse widths of respective lasers at the time of lighting pulse and prevent the deterioration of an image due to the dispersion of lasers in an image forming device using a plurality of lasers. SOLUTION: In a laser driving circuit, to be used for an image forming device in which light-modulated laser beam from a laser light source 64 using a plurality of lasers are emitted adjoiningly and guided onto an image carrying face to form an image on an image carrying body, respective lasers are provided with means 65 and 66 for lighting laser on a laser lighting signal to be input and means 67 and 68 for setting the bias current values, and respective lasers are lighted and the bias current is so set as to be provide the given quantity of light Pb.
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