Keiwa Inc.

Hiroki Maeda

Tadayuki Nonaka

Kana Miyamoto

An upper side light diffuser sheet includes a substrate layer, and a light diffusion layer overlaid on a front face side of the substrate layer. The light diffusion layer includes a resin matrix, and resin beads dispersed in the resin matrix. The resin beads include a first resin bead group having an average particle diameter D50 of 1.9 &#x3bc;m or more and 3.3 &#x3bc;m or less, and a second resin bead group having an average particle diameter D50 larger than the average particle diameter D50 of the first resin bead group. A mass ratio of the second resin bead group in an entire resin beads is 30% or more and 50% or less. A coating amount of the light diffusion layer is larger than 1.7 g/mand smaller than 3.0 g/m.

Growing community of inventors

Wakayama, Japan

Hiroki Maeda