Patent ID: 7823785
Filing Date: 2010-11-02
Classification: G02B,H01S

Abstract:
1. A planar light source apparatus comprising: a light source that emits a light flux forming a beam; a light guide plate having a substantially flat shape, in which one of two opposing main surfaces is an emitting face and an incident face is provided in a side face part, that changes the light flux incident to the incident face to a linear emitting light, and emits the linear emitting light from a substantially linear emitting region in the emitting face; and an optical scanning system that makes the linear emitting region scan across the emitting face by changing a traveling direction of the light flux in a regular scanning cycle and making incident the light flux into the incident face as the incident light, wherein a ratio, between a time derivative of a scanning square measure of the linear emitting region across the emitting face and a light intensity of the light flux, is kept substantially fixed over the scanning cycle.