公开(公告)号：US20170003422A1

公开(公告)日：2017-01-05

申请号：US15112889

申请日：2015-01-16

Applicant: Tomoegawa Co., Ltd.

Inventor： Masahide SUGIYAMA ,  Hiroto KATAGIRI ,  Hiroyuki ABE ,  Tsubasa SAKANO

IPC: G02B5/02 ,  G02F1/1335

CPC classification number: G02B5/0257 ,  B29D11/00788 ,  B29K2995/0044 ,  G02B5/0236 ,  G02B5/0268 ,  G02B5/0278 ,  G02F1/133504

Abstract: Provided is an anisotropic optical film, which can, while keeping excellent display characteristics (e.g., brightness and contrast) in the direction of a viewing angle, suppress decreased display characteristics in the other directions, when the anisotropic optical film is used as a diffusion film of a display panel.In an anisotropic optical film including two or more anisotropic light diffusion layers where the linear transmittance varies depending on the incident angle of incident light, each of the anisotropic light diffusion layers is provided with a matrix region and a plurality of pillar regions that differ in refractive index from the matrix region, the film includes, as the anisotropic light diffusion layers, at least two types of anisotropic light diffusion layers (a) and (b) that differ in linear transmittance, the maximum linear transmittance of the anisotropic light diffusion (a) is 40% or more and less than 95%, and the minimum linear transmittance thereof is less than 20%, and the maximum linear transmittance of the anisotropic light diffusion layer (h) is 20% or more and less than 40%, and the minimum linear transmittance thereof is less than 20%.

Abstract translation: 在包括两个或更多个各向异性光扩散层的各向异性光学膜中，其中线性透射率根据入射光的入射角而变化，各向异性光漫射层设置有矩阵区域和折射率不同的多个柱状区域 从矩阵区域的指数来看，作为各向异性光扩散层，膜包括线性透射率不同的至少两种各向异性光扩散层（a）和（b），各向异性光扩散的最大线性透射率 ）为40％以上且小于95％，其最小线性透射率小于20％，各向异性光扩散层（h）的最大线性透射率为20％以上且小于40％， 其最小线性透射率小于20％。

公开(公告)号：US20230408861A1

公开(公告)日：2023-12-21

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.

公开(公告)号：US20190302327A1

公开(公告)日：2019-10-03

申请号：US16332035

申请日：2017-08-14

Applicant: TOMOEGAWA CO., LTD.

Inventor： Makoto MURATA ,  Hiroto KATAGIRI

IPC: G02B5/02 ,  F21V8/00 ,  G02F1/1335

Abstract: Provided is a light diffusion film laminate for a reflective display device which is capable of reducing the change in the brightness of the image without reducing the visibility not only from a predetermined observation position (for example, the front direction of the screen), but also from a slightly inclined direction from the predetermined observation position (for example, the front direction of the screen), thereby having excellent display characteristics, and a reflective display device including the light diffusion film laminate.A light diffusion film laminate for a reflective display device has optical diffusibility that changes depending on an incident angle of light, and at least transmitting reflected light occurring when incident light is reflected by a reflective layer. The light diffusion film laminate includes an anisotropic light diffusion layer whose linear transmittance varies depending on the incident angle of the light; and an isotropic light diffusion layer provided on one surface of the anisotropic light diffusion layer, wherein the anisotropic light diffusion layer has a matrix region, and a pillar region composed of a plurality of pillar structures in the anisotropic light diffusion layer, wherein a scattering central axis angle of the anisotropic light diffusion layer is −5° or more and +5° or less with respect to a normal direction of the anisotropic light diffusion layer, and wherein the light diffusion film laminate for the reflective display device includes the anisotropic light diffusion layer and the isotropic light diffusion layer in this order from a viewing side of the reflected light.

公开(公告)号：US20150338698A1

公开(公告)日：2015-11-26

申请号：US14650481

申请日：2013-12-06

Applicant: TOMOEGAWA CO., LTD.

Inventor： Masahide SUGIYAMA ,  Hiroto KATAGIRI ,  Yusuke TAKECHI ,  Hiroyuki ABE

IPC: G02F1/1335 ,  G02B5/02

CPC classification number: G02B5/0263 ,  G02B5/0242 ,  G02B5/0257 ,  G02B5/0278 ,  G02F1/133504 ,  G02F1/133528 ,  G02F1/133606 ,  G02F2001/133507 ,  G02F2202/023

Abstract: Provided is a display apparatus which has a sufficient luminance even when viewed at a large viewing angle, and which can overcome a problem of color change. The display apparatus is a display apparatus including a display device showing a color change in accordance with viewer's viewing angle, and an anisotropic optical film having a diffusing property changed in accordance with the incident angle of light radiated thereinto. The anisotropic optical film has at least one scattering central axis, and an angle made between the scattering central axis and a direction along which the display device shows a minimum color change is from 20 to 65°, or −20 to −65°.

Abstract translation: 提供即使在大视角观看时也具有足够的亮度的显示装置，并且能够克服颜色变化的问题。 显示装置是包括根据观察者的视角显示颜色变化的显示装置的显示装置和具有根据照射到其中的光的入射角度而改变的漫射特性的各向异性光学膜。 各向异性光学膜具有至少一个散射中心轴，并且在散射中心轴与显示装置显示最小颜色变化的方向之间形成的角度为20°至65°或-20°至-65°。