公开(公告)号：US09989678B2

公开(公告)日：2018-06-05

申请号：US15129219

申请日：2015-03-17

Applicant: Tomoegawa Co., Ltd.

Inventor： Tsubasa Sakano ,  Masahide Sugiyama

IPC: G02B5/02 ,  G02F1/1335 ,  B05D7/04 ,  B29D11/00 ,  B05D5/06 ,  B05D3/06 ,  B29K667/00 ,  B29K33/00

CPC classification number: G02B5/0257 ,  B05D3/06 ,  B05D5/06 ,  B05D7/04 ,  B29D11/00798 ,  B29K2033/08 ,  B29K2667/003 ,  G02B5/0236 ,  G02B5/0268 ,  G02B5/0278 ,  G02F1/133504

Abstract: In an anisotropic optical film including two or more anisotropic light diffusion layers where a linear transmittance varies depending on an incident light angle, each of the anisotropic light diffusion layers has a matrix region and a plurality of pillar regions that differ in refractive index from the matrix region, at least two types of anisotropic light diffusion layers (a) and (b) that differ in aspect ratio between a short diameter and a long diameter at a cross section perpendicular to an orientation direction of the pillar regions are used as the anisotropic light diffusion layers, the aspect ratio between the short diameter and the long diameter in the pillar regions is made less than 2 in the anisotropic light diffusion layer (a), and the aspect ratio between the short diameter and the long diameter in the pillar regions is made 2 or more and 20 or less in the anisotropic light diffusion layer (b).

公开(公告)号：US09581738B2

公开(公告)日：2017-02-28

申请号：US14650481

申请日：2013-12-06

Applicant: Tomoegawa Co., Ltd.

Inventor： Masahide Sugiyama ,  Hiroto Katagiri ,  Yusuke Takechi ,  Hiroyuki Abe

IPC: G02F1/133 ,  G02B5/02 ,  G02F1/1335

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°。

公开(公告)号：US09274365B2

公开(公告)日：2016-03-01

申请号：US13738566

申请日：2013-01-10

Applicant: Tomoegawa Co., Ltd. ,  Japan Display West Inc.

Inventor： Masaya Tamaki ,  Tatsuya Yata ,  Yoko Fukunaga ,  Masashi Mitsui ,  Hiroto Katagiri ,  Masahide Sugiyama

IPC: G02F1/1335 ,  G02B5/02

CPC classification number: G02F1/133504 ,  G02B5/0236

Abstract: An anisotropic scatterer is configured to allow a scattering characteristic of light in a display region of a display device to have an angle dependence, and is configured to change the scattering characteristic of the light continuously in an in-plane direction.

Abstract translation: 各向异性散射体被配置为允许显示装置的显示区域中的光的散射特性具有角度依赖性，并且被配置为在面内方向上连续地改变光的散射特性。

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.

公开(公告)号：US11874481B2

公开(公告)日：2024-01-16

申请号：US17054768

申请日：2019-03-22

Applicant: Tomoegawa Co., Ltd.

Inventor： Tsubasa Sakano ,  Masahide Sugiyama

IPC: H01L29/08 ,  G02B5/02 ,  H10K50/854 ,  H10K59/35 ,  H10K59/38

CPC classification number: G02B5/0257 ,  G02B5/0221 ,  H10K50/854 ,  H10K59/35 ,  H10K59/38

Abstract: To provide a head-mounted display that can obtain a higher sense of immersion without sensing coloring by diffusing and transmitting light from an organic electroluminescence display panel by an anisotropic optical film to reduce the visibility of a black matrix (BM). The head-mounted display is provided with an anisotropic optical film on the viewing side with respect to a color filter or an RGB light emitting layer in an organic electroluminescence display panel, said anisotropic optical film having a linear transmittance that varies depending on an incident light angle. The head-mounted display is characterized in that: the anisotropic optical film includes at least a single or a plurality of anisotropic light diffusion layers; and the anisotropic light diffusion layers have a matrix region and a plurality of pillar regions having refractive indexes different from that of the matrix region.

公开(公告)号：US11126002B2

公开(公告)日：2021-09-21

申请号：US17054761

申请日：2019-03-22

Applicant: Tomoegawa Co., Ltd. ,  Japan Display Inc.

Inventor： Tsubasa Sakano ,  Masahide Sugiyama ,  Tetsuya Ooshima ,  Ryotaro Kogure ,  Yukihiro Nakamura

IPC: G02B27/01 ,  G02F1/1335

Abstract: This head-mounted display is provided with, closer to the viewing side than a color filter having a black matrix between pixels in a liquid crystal display panel (160), an anisotropic optical film (150), the linear transmittance of which changes according to the angle of incident light, wherein the anisotropic optical film (150) includes a single-layered or multilayered anisotropic light diffusion layer, on at least on one surface of the anisotropic light diffusion layer, surface asperities having an arithmetic average roughness Ra of 0.10 μm or less, which is measured in accordance with JIS B0601-2001, are formed, the anisotropic light diffusion layer has a matrix region and a plurality of pillar regions having a refractive index different from that of the matrix region, and the visibility of the black matrix is lowered by the anisotropic optical film (150), thereby making it possible to obtain a higher sense of immersion without feeling coloring.

公开(公告)号：US09958580B2

公开(公告)日：2018-05-01

申请号：US14648372

申请日：2013-11-29

Applicant: Tomoegawa Co., Ltd.

Inventor： Masahide Sugiyama

IPC: G02B5/02 ,  G02F1/1335

CPC classification number: G02B5/0257 ,  G02B5/0236 ,  G02F1/133504

Abstract: Provided is an anisotropic optical film which is capable of diffusing and condensing light in a wide incident angle range even when this film merely has a single anisotropic diffusion layer, which gives no unnatural impression, and which does not easily generate any light interference (rainbow). An anisotropic optical film having a diffusing property which varies in accordance with the incident angle of light radiated thereinto. The film has rectangularly columnar region, and a matrix region. At an incident angle of the light at which a maximum linear transmittance is exhibited, the maximum linear transmittance is 30% or more and less than 95%; and at an incident angle of the light at which a minimum linear transmittance is exhibited, the minimum linear transmittance is 20% or less.

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：US10670788B2

公开(公告)日：2020-06-02

申请号：US16332011

申请日：2017-07-24

Applicant: TOMOEGAWA CO., LTD.

Inventor： Tsubasa Sakano ,  Masahide Sugiyama

IPC: G02B5/30 ,  G02F1/1335 ,  G02B5/02 ,  G02F1/13357

Abstract: Provided is a light diffusion film laminate for a reflective display device that can improve the reflection luminance at a predetermined observation position (for example, the front direction of the screen) without reducing the visibility not only from the predetermined observation position (for example, the front direction of the screen) but also from a position away from a predetermined observation position (for example, an oblique direction deviated from the front of the screen) 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 transmits reflected light occurring when incident light is reflected by a reflective layer. The light diffusion film laminate includes at least an anisotropic light diffusion layer that has a scattering central axis and whose linear transmittance changes depending on an incident light angle of the light, wherein the anisotropic light diffusion layer has a matrix region and a plurality of pillar structures, wherein an angle of the scattering central axis is in a range of +6° or more and +40° or less, or −40° or more and −6° or less with respect to a normal direction of the anisotropic light diffusion layer, and an isotropic light diffusion layer disposed on one surface of the anisotropic light diffusion layer.

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.