Patent ID: 9366798
Filing Date: 2016-06-14
CPC Classification: G02B

Claim Text:
1. A light guide plate having a light incident surface, a light distributing control surface perpendicular to said light incident surface and a light emitting surface opposing said light distributing control surface, comprising: a flat mirror-finish portion provided on a first area of said light distributing control surface; and a prism sequence provided on a second area of said light distributing control surface where said flat mirror-finish portion is not provided, said prism sequence being protruded with respect to said flat mirror-finish portion, wherein each prism of said prism sequence has a rising sloped surface opposing said light incident surface, a first falling sloped surface connected to said rising sloped surface, and a second falling sloped surface connected to said first falling sloped surface, a slope of said first falling sloped surface being larger than a slope of said second falling sloped surface, wherein each of said first and second falling sloped surfaces is straightly-sloped, wherein a slope angle β1 of said first falling sloped surface with respect to said flat mirror finishing portion satisfies: wherein a slope angle β2 of said second falling sloped surface with respect to said flat mirror finishing portion satisfies: wherein an area S