Patent ID: 7680165
Filing Date: 2010-03-16
Classification: H01S,H04N

Abstract:
1. A light source device comprising: a plurality of laser light sources that emit laser light; and 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 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 that varies 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 laser light emitted from the laser light sources, the light source driving section being connected in series with at least one of the laser light sources, the light source driving section including a switching circuit supplying the laser light sources with one of the first driving value and the second driving value, the light source driving section including the switching circuit connected in series with one of the laser light sources, and the light source driving section including a driving value adjusting circuit connected in series with a light-amount-adjusting laser light source that is not connected to the switching circuit, wherein one of the first driving value and the second driving value is supplied by the switching circuit to the laser light sources that is connected with the switching circuit, and the driving value that is supplied to the light-amount-adjusting laser light source connected with the driving value adjusting circuit is adjusted by the driving value adjusting circuit.