Light source device with optical guiding member and planar light source device employing same

摘要

A planar light source device ( 6 ) for a liquid crystal display device. The planar light source device includes a light source device ( 2 ) and a light guide plate ( 67 ). The light source device includes a light-emitting element ( 21 ), and an optical guiding member ( 20 ) that is hollow and has a reflective surface. The reflective surface receives light rays emitted by the light-emitting element, and guides the light rays out from a plurality of generally aligned through holes ( 23 ) defined in a front light-emitting surface ( 28 ) of the optical guiding member. The light guide plate has a light incident surface adjacent to the light source device. The planar light source device can greatly diminish possible dark regions on the light-emitting surface of the light guide plate, and provide uniform illumination for an LCD.