OPTICAL MEMBER, ILLUMINATOR FOR DISPLAY DEVICE, DISPLAY DEVICE AND TELEVISION RECEIVER

摘要

PROBLEM TO BE SOLVED: To provide an optical member capable of keeping uniform optical characteristics when placed in an environment exposed to heat and if necessary, preventing or suppressing generation of grating sounds or the like.

SOLUTION: The optical member 15 includes a light diffusing sheet 31 diffusing light and a lens sheet 32 having a plurality of lenses 34 disposed thereon, wherein the light diffusion sheet 31 and the lens sheet 32 are laminated to each other, and the coefficient α1 of linear expansion of the light diffusing sheet 31 and the coefficient α2 of linear expansion of the lens sheet 32 are different from each other, and the optical member is curved to form a convex on the side of the sheet having the smaller coefficient of linear expansion of the light diffusing sheet 31 and the lens sheet 32.

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