Patent ID: 8400583
Filing Date: 2013-03-19
Classification: G02B

Abstract:
1. A light source apparatus, comprising: a light guide plate; a plurality of optical sheets provided so as to be layered on a light emitting surface of the light guide plate; and a frame housing the light guide plate and the plurality of optical sheets therein, wherein: one of the plurality of optical sheets which is arranged at a position most distant from the light guide plate is a prism sheet, the prism sheet having: the one or more projecting pieces engage to the frame, at least one of the one or more projecting pieces is a dark part suppressing projecting piece, sides making a pair of sides adjoining the dark part suppressing projecting piece are dark part suppressing sides, a first angle formed by a pair of dark part suppressing sides is equal to or smaller than a dark part suppressing angle, and second angles, making a pair of angles formed with a straight line and each of sides making the pair of dark part suppressing sides, are equal to or smaller than half of the dark part suppressing angle, the straight line: