Patent ID: 7163330
Filing Date: 2007-01-16
Classification: G02B,G02F

Abstract:
1. A front light comprising: an optical waveguide having a first surface and a second surface facing the first surface; and a point light source arranged to emit light into the optical waveguide, wherein a plurality of patterns comprising inclination surfaces for deflecting the light are provided on the first surface, wherein an angle formed by a direction connecting the point light source to an inclination surface of one of the patterns and a normal line of the inclination surface of the one of the patterns is selected depending on the direction connecting the point light source to the inclination surface of the one of the patterns, and wherein normal lines of the inclination surfaces of the patterns on a circumference centering around the point light source are converged on one point existing at a position different from that of the point light source when viewed from a direction vertical to the second surface of the optical waveguide.