Patent ID: 8882326
Filing Date: 2014-11-11
Classification: G02B

Abstract:
1. A light guide plate comprising: an incident surface on which light outputted from a plurality of point light sources is incident; an outgoing surface from which light incident from the incident surface is outputted, the outgoing surface being orthogonal to the incident surface; and a reflection-and-propagation surface at which the light incident from the incident surface is reflected so as to be propagated toward the outgoing surface, the reflection-and-propagation surface being opposed to the outgoing surface and being orthogonal to the incident surface, wherein a plurality of prism grooves extending parallel to the incident surface are formed in the reflection-and-propagation surface, a flat surface portion is formed in a propagation region of the outgoing surface adjacent to the incident surface, and a plurality of prism protrusions extending orthogonal to the incident surface are formed in a diffusion-and-propagation region of the outgoing surface adjacent to the propagation region, each of the prism protrusions including a protrusion having a curved portion at its upper end.