Patent ID: 6877871
Filing Date: 2005-04-12
Classification: F21V,F21Y,G02B

Abstract:
1. A light guide plate comprising: an emission face provided by a major face; a back face opposite with said emission face; and a plurality of end faces for introducing light, the end faces including a first end face extending in a first direction and a second end face extending in a second direction which is generally perpendicular to said first direction, wherein said back face is provided with a great number of projection-like micro-reflectors and a great number of ridge-like projections for direction conversion, each of said micro-reflectors having a pair of slopes which meet each other as to form a ridge that gets closer to said back face with an increasing distance from said first end face and extends in a direction generally perpendicular to said first direction, said great number of ridge-like projections extending in a direction generally parallel with said second direction.