| 主权项 |
1. A light source driving apparatus comprising:
a light source constituted by a semiconductor laser that emits a laser light; a driver configured to drive the light source based on a driving signal constituted by a pulse having a predetermined duty cycle that changes a driving current value; and a controller configured to control the driver, wherein the controller,
when a luminance corresponding to a first laser output power exceeding a threshold value, which is a predetermined laser output power, is to be expressed by the laser light that is output by the light source, is configured to control the driver to supply to the light source a driving signal constituted by a pulse having a first duty cycle at a first driving current value corresponding to the first laser output power such that the light source emits a laser light having the first laser output power,when a luminance corresponding to a second laser output power that is equal to or less than the threshold value is to be expressed by the laser light that is output by the light source, is configured to control the driver to supply to the light source a driving signal constituted by a pulse having a second duty cycle that is smaller than the first duty cycle at a second driving current value corresponding to a third laser output power such that the light source emits a laser light having the third laser output power that exceeds the threshold value instead of the second laser output power, andis configured to set a laser output power that is greater than a maximum laser output power within a kink region of an I-L characteristic possessed by the semiconductor laser as the threshold value. |
