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

摘要

PROBLEM TO BE SOLVED: To provide an optical sheet capable of sufficiently absorbing ultraviolet ray and having high transmittance of blue light, and a surface light source device and a transmission type display device using the same.

SOLUTION: The light control sheet 15 has a transmittance T1 of light of wavelength 430 nm and a transmittance T2 of light of wavelength 360 nm which satisfy the relation of T1/T2≥160. The sheet 15 has a lens shape in which a plurality of unit optical shapes 151 is aligned on one side, and is formed by extrusion molding or the like by use of a thermoplastic resin such as MBS resin to which an ultraviolet absorber is added.

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