OPTICAL MEMBER, SURFACE LIGHT SOURCE DEVICE, AND TRANSMISSION TYPE DISPLAY

摘要

PROBLEM TO BE SOLVED: To provide an optical member capable of preventing effectively a front-directional brightness and dispersion thereof from being generated.;SOLUTION: The optical member 30 includes a first optical sheet 40 having a plurality of unit lenses 45 convexed toward a light-emitting side, a second optical sheet 60 arranged in the light-emitting side of the first optical sheet, and an adhesive layer 35 for bonding the two sheets. Each unit lens is extended linearly along a direction orthogonal to an arrayed direction thereof, and the adhesive layer is formed in a stripe-shape while positioned in the light-emitting side of an apex part of each unit lens. The unit lens is provided with a diffusion part 50 extended along a light-emitting side face, and a thickness t1 of the diffusion part in the vicinity 45a of the apex part of the unit lens is smaller than a thickness t2 of the diffusion part in the vicinity 45a of an end part thereof.;COPYRIGHT: (C)2010,JPO&INPIT