公开(公告)号：US11209587B2

公开(公告)日：2021-12-28

申请号：US16497855

申请日：2018-03-30

Applicant: TOMOEGAWA CO., LTD.

Inventor： Masahide Sugiyama ,  Masao Kato ,  Tsubasa Sakano ,  Shogo Suga

IPC: G02F1/1335 ,  F21V8/00

Abstract: According to the present invention, a light guiding laminate including a light guide plate with good visibility and an anisotropic optical film, and a planar light source device including the light guiding laminate and a light source are provided.
There are a light guiding laminate including a light guide plate which has: a light emission surface through which light incident from an end face is bent and emitted in a surface direction, and an angle at which emission intensity in the light emission surface is maximum, the angle being 20° to 60° with respect to a perpendicular direction to the light emission surface; and an anisotropic optical film which is laminated directly or via another layer and has diffusibility changing depending on an angle of incident light with respect to the light emission surface, in which an opposite surface which is a surface on an opposite side to the light emission surface of the light guide plate has a plurality of concave or convex structures having a size of 50 μm or less and a height or a depth of 50 μm or less, the anisotropic optical film has a matrix region and a structural region formed of a plurality of structures, and linear transmittance of the anisotropic optical film, which is an amount of transmitted light in a linear direction of light incident on the anisotropic optical film/an amount of incident light, is 30% or less at an angle at which the emission intensity of the light guide plate is maximum, and a planar light source device using the light guiding laminate.

公开(公告)号：US20200026120A1

公开(公告)日：2020-01-23

申请号：US16490277

申请日：2018-03-15

Applicant: Tomoegawa Co., Ltd.

Inventor： Masao Kato ,  Masahide Sugiyama ,  Tsubasa Sakano

IPC: G02F1/1335 ,  G02B5/02 ,  G02B1/111

Abstract: A display device including an anti-glare film containing: at least an anti-glare layer 1 in which a first surface la is an uneven surface; and an anisotropic light diffusion layer 3 provided on a second surface 1b side of the anti-glare layer 1, wherein the anisotropic light diffusion layer 3 includes a matrix region and a plurality of pillar regions having refractive indices different from that of the matrix region, the pillar regions extend from one surface side toward the other surface side of the anisotropic light diffusion layer 3, and an average height of the pillar regions in a thickness direction of the anisotropic light diffusion layer 3 is 80% or more of a thickness of the anisotropic light diffusion layer 3 suppresses the occurrence of scintillation and the decrease in front contrast.

公开(公告)号：US12066710B2

公开(公告)日：2024-08-20

申请号：US18459858

申请日：2023-09-01

Applicant: TOPPAN INC. ,  Tomoegawa Co., Ltd.

Inventor： Ayumu Sato ,  Kunpei Kobayashi ,  Norihiro Arai ,  Kazuhiko Oosawa ,  Hiroto Katagiri ,  Masahide Sugiyama ,  Masao Kato

IPC: G02F1/1335

CPC classification number: G02F1/133536 ,  G02F1/133504

Abstract: An optical member including a polarizing plate having an absorption axis and a transmission axis which are orthogonal to each other, a reflective polarizing plate having a reflection axis and a transmission axis which are orthogonal to each other, and an optical anisotropic diffusion layer which is provided between the polarizing plate and the reflective polarizing plate and whose linear transmittance varies according to an incident light angle.