Light source device, monitor device, projector, and driving method for driving light source device

A light source device comprising:

• a plurality of laser light sources that emit laser light;
• a light source driving section that drives at least one of the laser light sources by a first driving value that is a value less than a threshold level of the laser light sources, or by a second driving value that is a value greater than a threshold level of at least one of the laser light sources, and that varies at least one of the of laser light sources that are driven by the first driving value and the of laser light sources that are driven by the second driving value in the laser light sources, thereby controlling the total output of laser light emitted from the laser light sources;
• and
• a storage section that stores historical drive information with regard to each of the laser light sources that are turned on or off depending on a passage of time, wherein
• the light source driving section includes a light source control circuit that selectively drives each of the laser light sources, based on the historical drive information stored in the storage section.

A driving method for driving a light source device, comprising:

• driving a plurality of laser light sources by a first driving value that is a value less than a threshold level of at least one of the laser light sources, or by a second driving value that is a value greater than a threshold level of at least one of the laser light sources;
• and
• varying at least one of a number of laser light sources that are driven by the first driving value and a number of laser light sources that are driven by the second driving value in the laser light sources, thereby controlling the total output of the laser light emitted from the laser light sources;
• and
• storing historical drive information with regard to each of the laser light sources that are turned on or off depending on a passage of time, wherein
• each of the laser light sources is selectively driven based on the historical drive information stored in the storing of the historical drive information, in the driving of the light source.