Plane light source device and display device provided with the same

摘要

The present invention aims to provide a plane light source device having enhanced efficiency of use of light and high brightness uniformity. A plane light source device of the present invention is provided with a housing having an opening section, a scattering plate arranged at the opening section for scattering incoming light and a light source arranged at one side face in the housing, wherein a regular reflection section for regularly reflecting light incoming from the light source is provided in the vicinity of the light source at the bottom surface of the housing that is opposite to the scattering plate and a scatter reflection section for irregularly reflecting light incoming from the light source is provided so as to be adjacent to the regular reflection section.