Patent ID: 8506152

Claim:
A light guide plate comprising: at least one incident surface into which light is incident; an exit surface through which the light is output, at least one end of the exit surface connected to the incident surface; an opposite surface opposing the exit surface; a second surface opposing the incident surface; and a plurality of reflective patterns, each extending from the exit surface toward the opposite surface, wherein, when a direction from the exit surface to the opposite surface is referred to as a first direction, a direction perpendicular to the incident surface is referred to as a second direction, and a direction parallel to the incident surface and perpendicular to the first direction is referred to as a third direction, a length of each reflective pattern in the first direction is smaller than a distance between the exit surface and the opposite surface, and a length of each reflective pattern in the second direction is larger than a length of each reflective pattern in the third direction, and wherein at least one of the reflective patterns is formed in a portion of the light guide plate that is not adjacent to the incident surface and not adjacent to the second surface.