Patent ID: 9547117
Date: 2017-01-17
CPC Classifications: G02B

Claim:
1. A light guide plate comprising: a light entry surface; a light exit surface connected to said light entry surface and facing toward a direction different from a direction toward which said light entry surface faces; a first light guide structure disposed on said light entry surface, and including a plurality of first elongated elements, each of which has a first longitudinal axis parallel to said light entry surface and a cross-section transverse to the first longitudinal axis and in a shape of a first circular segment; and a second light guide structure disposed on said light exit surface, and including a plurality of second elongated elements, each of which has a second longitudinal axis parallel to said light exit surface and a cross-section transverse to the second longitudinal axis and in a shape of a second circular segment, wherein: said light entry surface has a plurality of first directing units, each of said first directing units having a first width transverse to the first longitudinal axis; said first elongated elements are arranged on said light entry surface such that at least one of said first elongated elements is disposed on each of said first directing units; said light exit surface has a plurality of second directing units, each of said second directing units having a second width transverse to the second longitudinal axis; and said second elongated elements are arranged on said light exit surface such that at least one of said second elongated elements is disposed on each of said second directing units, said light guide plate satisfying 1.25×10