OPTICAL EQUALIZING ELEMENT, OPTICAL SHEET, BACKLIGHT UNIT AND DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an optical equalizing element capable of reducing/eliminating a lamp image by equalizing incident light from a plurality of light sources and emitting it and coping with such cases in which the distance between a light source and the optical element is shortened and interval between the light sources is expanded.

SOLUTION: In the optical equalizing element 25 having a structure in which a light propagation layer 23 and an optical deflection element 28 are provided at a light incident surface side of a light diffusion substrate 26, the light diffusion substrate 26 is structured so as to include a first transparent resin layer formed from a first transparent resin material in which light diffusion particles having≥0.02μm and≤0.6μm average particle diameter and refractive index of≥1.7 and≤2.8 are incorporated.

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