Light-diffusing sheet, backlight unit, liquid crystal display device, and information apparatus
AssigneeKeiwa Inc.
InventorsKenichi HARADA, Chengheng TSAI, Hiroaki UENO, Akira FURUTA
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Abstract
A light-diffusing sheet, a backlight unit, a liquid crystal display device and an information apparatus are provided. The light-diffusing sheet has a first surface that serves as one of a light emission surface and a light incidence surface, and a second surface that serves as the other of the light emission surface and the light incidence surface. The first surface is provided with multiple recesses each having inverted substantially square pyramidal shape. An arithmetic mean roughness of the second surface is 1.5 μm or less. A transfer rate of the recesses is 87% or more.
Claims11
A light-diffusing sheet, comprising:
- a first surface that serves as one of a light emission surface and a light incidence surface;
- and
- a second surface that serves as the other of the light emission surface and the light incidence surface, wherein
- the first surface is provided with a plurality of recesses each having inverted substantially square pyramidal shape,
- an arithmetic mean roughness of the second surface is 1.5 μm or less, and
- a transfer rate of the plurality of recesses is 87% or more.
Dependencies are inferred from the claim text.