ILLUMINATION DEVICE AND DISPLAY DEVICE

摘要

Provided is an illumination device capable of reducing uneven luminance within a plane when viewed from an oblique direction and not only from the front direction. K1 is the percentage occupied in a first region (R1) by a return light generation part (r1), which generates the return light which is the light incident perpendicular to the light incident plane of an optical sheet (13) from each linear light source (10) fully reflected by the surface of a bump (13A) and directed towards a reflecting plate (11), when the optical sheet (13) is viewed from the direction normal to a plane (10A). K2 is the percentage occupied in a second region (R2) by a return light generation part (r2), which generates the return light which is the light incident perpendicular to the light incident plane of the optical sheet (13) from each linear light source (10) fully reflected by the surfaces of the bumps (13B,13C) and directed towards the reflecting plate (11), when the optical sheet (13) is viewed from the direction normal to the plane (10A). K1 is greater than K2.