公开(公告)号：US10310368B2

公开(公告)日：2019-06-04

申请号：US15895140

申请日：2018-02-13

Applicant: LINTEC Corporation

Inventor： Kentaro Kusama ,  Baku Katagiri

IPC: G03B21/62 ,  G02B5/02

Abstract: Provided is a projection screen that can effectively diffuse incident light coming from a wide range of angles in the transverse direction and the longitudinal direction and can provide a wide viewing angle even if the projection screen is applied to a large-sized screen. Disclosed is a projection screen including a light diffusion control plate, in which when a first direction and a second direction orthogonally intersecting each other are assumed to be on the surface of the light diffusion control plate, and when the incident angle of the light incident to the light diffusion control plate is defined such that an angle parallel to the normal line to the surface of the light diffusion control plate is defined as 0°, in a case in which the luminance of diffused light obtainable when light is incident at an incident angle of 0° is designated as L0; the luminance of diffused light obtainable when light is incident at a predetermined incident angle along the first direction is designated as L1; and the luminance of diffused light obtainable when light is incident at a predetermined incident angle along the second direction is designated as L2, there exist a first direction and a second direction, in which L0, L1, and L2 always satisfy the following relational expressions (1) and (2): L1≥0.25×L0  (1) L2≥0.25×L0  (2).

公开(公告)号：US09753191B2

公开(公告)日：2017-09-05

申请号：US14774920

申请日：2014-02-25

Applicant: LINTEC Corporation

Inventor： Kentaro Kusama ,  Baku Katagiri ,  Tomoo Orui ,  Satoru Shoshi

IPC: G02B5/02 ,  C08F299/06 ,  C08L33/14 ,  C08L55/00 ,  G02F1/1335

CPC classification number: G02B5/0247 ,  C08F299/065 ,  C08L33/14 ,  C08L55/005 ,  G02B5/0236 ,  G02B5/0257 ,  G02B5/0268 ,  G02B5/0278 ,  G02B2207/123 ,  G02F1/133504

Abstract: Provided are a light diffusion film having a single-layered light diffusion layer, in which the uniformity of the intensity of diffused light in the light diffusion angle region can be increased, or the light diffusion angle region can be expanded effectively, by regulating the combination of the angles of inclination of pillar-shaped objects in plural columnar structure regions, and a method for manufacturing a light diffusion film. Disclosed is a light diffusion film having a single-layered light diffusion layer, the light diffusion film having a first columnar structure region and a second columnar structure region, in which plural pillar-shaped objects having a relatively high refractive index are arranged to stand close together in a region having a relatively low refractive index, sequentially from the lower part of the film along the film plane.

公开(公告)号：US09632217B2

公开(公告)日：2017-04-25

申请号：US14774678

申请日：2014-02-04

Applicant: LINTEC Corporation

Inventor： Kentaro Kusama ,  Baku Katagiri ,  Tomoo Orui ,  Satoru Shoshi

IPC: G02B5/02 ,  C08F283/00 ,  C08F290/14

CPC classification number: G02B5/0236 ,  C08F283/006 ,  C08F290/147 ,  C08J2367/02 ,  C08J2433/06 ,  C08J2475/16 ,  G02B5/0257 ,  G02B5/0268 ,  G02B5/0278 ,  G02B2207/123 ,  C08F220/30 ,  C08F2220/301

Abstract: A composition for light diffusion film in which the angle of aperture of diffused light in a light diffusion film obtainable therefrom can be expanded effectively, and a light diffusion film obtainable by the composition for light diffusion film are provided.

公开(公告)号：US12117625B2

公开(公告)日：2024-10-15

申请号：US17523145

申请日：2021-11-10

Applicant: LINTEC CORPORATION

Inventor： Baku Katagiri ,  Tatsuki Kuramoto ,  Tetsuya Arazoe ,  Kentaro Kusama

IPC: G02B5/00 ,  G02B5/02

CPC classification number: G02B5/0236

Abstract: A reflective display body configured such that the up-down direction of display content on a display surface can be changed. The reflective display body includes a light diffusion control layer, a display device, and a reflective layer. The light diffusion control layer has a diffusion angle width of 5° or more and 80° or less in which a haze value (%) is 90% or more as measured when one surface of the light diffusion control layer is irradiated with light rays at an incident angle of −70° to 70° with respect to the normal direction of the one surface being 0°. The light diffusion control layer has an acute angle of 7° or more and 83° or less.

公开(公告)号：US11630248B2

公开(公告)日：2023-04-18

申请号：US17083886

申请日：2020-10-29

Applicant: LINTEC CORPORATION

Inventor： Tatsuki Kuramoto ,  Kentaro Kusama ,  Baku Katagiri

IPC: G02B5/02

Abstract: A laminate used under an environment irradiated with external light includes a light diffusion control film having an internal structure in the film. The internal structure includes a plurality of regions having a relatively high refractive index in a region having a relatively low refractive index. The laminate further includes an ultraviolet absorbing layer located further on the external light incident side than the light diffusion control film. The light diffusion control film contains a hindered amine-based compound.

公开(公告)号：US10288779B2

公开(公告)日：2019-05-14

申请号：US15685311

申请日：2017-08-24

Applicant: LINTEC Corporation

Inventor： Kentaro Kusama ,  Baku Katagiri ,  Tomoo Orui ,  Satoru Shoshi

IPC: G02B5/02 ,  C08L33/14 ,  C08L55/00 ,  C08F299/06 ,  G02F1/1335

Abstract: Provided are a light diffusion film having a single-layered light diffusion layer, in which the uniformity of the intensity of diffused light in the light diffusion angle region can be increased, or the light diffusion angle region can be expanded effectively, by regulating the combination of the angles of inclination of pillar-shaped objects in plural columnar structure regions, and a method for manufacturing a light diffusion film. Disclosed is a light diffusion film having a single-layered light diffusion layer, the light diffusion film having a first columnar structure region and a second columnar structure region, in which plural pillar-shaped objects having a relatively high refractive index are arranged to stand close together in a region having a relatively low refractive index, sequentially from the lower part of the film along the film plane.

公开(公告)号：US10185063B2

公开(公告)日：2019-01-22

申请号：US14786733

申请日：2014-03-13

Applicant: LINTEC Corporation ,  TOHOKU University

Inventor： Kentaro Kusama ,  Baku Katagiri ,  Tomoo Orui ,  Satoru Shoshi ,  Hideo Fujikake ,  Takahiro Ishinabe

IPC: G02B5/02 ,  G02B1/04 ,  F21V8/00 ,  G02F1/1335

Abstract: Provided are an optical-diffusion film for display which, particularly when applied to a reflective display device, can efficiently diffuse and emit an external light incident from a wide range of angles toward the front of the display device as image display light, and a reflective display device using the optical-diffusion film.Disclosed is an optical-diffusion film for display, which is a single-layered optical-diffusion film obtained by photocuring a composition for optical-diffusion film including two or more kinds of polymerizable compounds having different refractive indices, and in which the film thickness of the optical-diffusion film has a value within the range of 60 to 700 μm, and when a coating layer formed by applying a composition for optical-diffusion film in a film form is photocured, and the incident angle of incident light with respect to the normal line of the film plane is varied in the range of −70° to 70° along the travel direction of the coating layer at the time of photocuring, the haze value at each incident angle has a value of 70% or more.

公开(公告)号：US10094958B2

公开(公告)日：2018-10-09

申请号：US14655696

申请日：2013-12-02

Applicant: LINTEC Corporation

Inventor： Baku Katagiri ,  Kentaro Kusama ,  Tomoo Orui

IPC: G02B5/02 ,  G02B27/09 ,  G02F1/1335

Abstract: According to the present invention, there is provided a light diffusion film for diffusing incident light into an elliptical shape, which contains, inside the film, a structure composed of a plurality of flaky-shaped objects with comparatively high refractive index arranged in multiple rows in a region with comparatively low refractive index along any one arbitrary direction along the film plane. If T50 (μm) is the width of the flaky-shaped objects at a position of 50 μm below the upper end of the flaky-shaped objects in the direction of the thickness of the light diffusion film, and if L50 (μm) is the length of the flaky-shaped objects in the above-mentioned arbitrary one direction, the following relation (1) is satisfied: 0.05≤T50/L50

公开(公告)号：US11940635B2

公开(公告)日：2024-03-26

申请号：US16997245

申请日：2020-08-19

Applicant: LINTEC CORPORATION

Inventor： Baku Katagiri ,  Kentaro Kusama ,  Tatsuki Kuramoto

IPC: G02B5/02

CPC classification number: G02B5/0236 ,  G02B5/0284

Abstract: A light diffusion control body includes at least two light diffusion control layers each having a regular internal structure. The regular internal structure includes a plurality of regions having a relatively high refractive index in a region having a relatively low refractive index. The at least two light diffusion control layers includes a first light diffusion control layer and a second light diffusion control layer each having a minimum value of a haze value of 35% or more. The haze value is measured when one surface of each of the first light diffusion control layer and the second light diffusion control layer is irradiated sequentially with a light ray at an incident angle of −70° to 70° with respect to the normal direction of the surface being 0°.

公开(公告)号：US11422401B2

公开(公告)日：2022-08-23

申请号：US16798520

申请日：2020-02-24

Applicant: LINTEC CORPORATION

Inventor： Tatsuki Kuramoto ,  Kentaro Kusama ,  Baku Katagiri

IPC: G02F1/1335 ,  G02B5/02

Abstract: A light diffusion film having an internal structure in the film. The internal structure includes a plurality of regions having a relatively high refractive index in a region having a relatively low refractive index. The light diffusion film has an indentation elastic modulus of 30 MPa or more at 23° C.