Patents by Inventor Kentaro Kusama

Kentaro Kusama has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220146719
    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.
    Type: Application
    Filed: November 10, 2021
    Publication date: May 12, 2022
    Applicant: LINTEC CORPORATION
    Inventors: Baku KATAGIRI, Tatsuki KURAMOTO, Tetsuya ARAZOE, Kentaro KUSAMA
  • Patent number: 11328631
    Abstract: In various embodiments, the present invention is directed to an interior-light-utilizing display obtained by laminating a reflection structure and a light diffusion film, in which the light diffusion film has an internal structure including a plurality of regions having a relatively high refractive index in a region having a relatively low refractive index in the film. The interior-light-utilizing display provides improved luminance and is capable of stably maintaining constant display characteristics even where the incident angle of the external light changes.
    Type: Grant
    Filed: January 10, 2019
    Date of Patent: May 10, 2022
    Assignee: LINTEC Corporation
    Inventors: Kentaro Kusama, Tatsuki Kuramoto
  • Patent number: 11307611
    Abstract: A reflective display body includes a light diffusion control layer and a reflective layer. The light diffusion control layer has a plurality of regions having a relatively high refractive index in a region having a relatively low refractive index. The regions having the relatively high refractive index extend from one surface side toward the other surface side of the light diffusion control layer, and a straight line parallel to the extending direction is tilted with respect to the thickness direction of the light diffusion control layer. When a vector C is obtained by projecting a vector, which is parallel to the extending direction and directed from the surface side distal to the display surface of the reflective display body toward the display surface side, onto the display surface, the smallest angle among three angles between vector C and vectors D1 to D3 is more than 0° and 45° or less.
    Type: Grant
    Filed: December 4, 2020
    Date of Patent: April 19, 2022
    Assignee: LINTEC CORPORATION
    Inventors: Baku Katagiri, Kentaro Kusama, Tatsuki Kuramoto
  • Publication number: 20210278573
    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 has an indentation elastic modulus of 30 MPa or more as measured at a maximum load of 2 mN by a nanoindentation method.
    Type: Application
    Filed: March 5, 2021
    Publication date: September 9, 2021
    Applicant: LINTEC CORPORATION
    Inventors: Tatsuki KURAMOTO, Kentaro KUSAMA, Baku KATAGIRI
  • Publication number: 20210191004
    Abstract: A light diffusion control member includes a first light diffusion control layer and a second light diffusion control layer. The first light diffusion control layer and the second light diffusion control layer has a regular internal structure that includes a plurality of regions having a relatively high refractive index in a region having a relatively low refractive index. The first light diffusion control layer and the second light diffusion control layer are laminated so that an angle between two respective vectors determined based on the regular internal structure in the first light diffusion control layer and the second light diffusion control layer is more than 0° and 90° or less.
    Type: Application
    Filed: December 11, 2020
    Publication date: June 24, 2021
    Applicant: LINTEC CORPORATION
    Inventors: Kentaro KUSAMA, Baku KATAGIRI, Tatsuki KURAMOTO
  • Publication number: 20210173435
    Abstract: A reflective display body includes a light diffusion control layer and a reflective layer. The light diffusion control layer has a plurality of regions having a relatively high refractive index in a region having a relatively low refractive index. The regions having the relatively high refractive index extend from one surface side toward the other surface side of the light diffusion control layer, and a straight line parallel to the extending direction is tilted with respect to the thickness direction of the light diffusion control layer. When a vector C is obtained by projecting a vector, which is parallel to the extending direction and directed from the surface side distal to the display surface of the reflective display body toward the display surface side, onto the display surface, the smallest angle among three angles between vector C and vectors D1 to D3 is more than 0° and 45° or less.
    Type: Application
    Filed: December 4, 2020
    Publication date: June 10, 2021
    Applicant: LINTEC CORPORATION
    Inventors: Baku KATAGIRI, Kentaro KUSAMA, Tatsuki KURAMOTO
  • Publication number: 20210132268
    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.
    Type: Application
    Filed: October 29, 2020
    Publication date: May 6, 2021
    Applicant: LINTEC CORPORATION
    Inventors: Tatsuki KURAMOTO, Kentaro KUSAMA, Baku KATAGIRI
  • Publication number: 20210055459
    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°.
    Type: Application
    Filed: August 19, 2020
    Publication date: February 25, 2021
    Applicant: LINTEC CORPORATION
    Inventors: Baku KATAGIRI, Kentaro KUSAMA, Tatsuki KURAMOTO
  • Publication number: 20200271833
    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.
    Type: Application
    Filed: February 24, 2020
    Publication date: August 27, 2020
    Applicant: LINTEC CORPORATION
    Inventors: Tatsuki KURAMOTO, Kentaro KUSAMA, Baku KATAGIRI
  • Patent number: 10545267
    Abstract: Provided are an optical diffusion film composed of a single layer, for which the optical diffusion incident angle region can be effectively expanded, and even when the incident angle of incident light is varied within the optical diffusion incident angle region, changes in the optical diffusion characteristics can be effectively suppressed; and a method for manufacturing the optical diffusion film. Disclosed is an optical diffusion film having, inside the film, a single optical diffusion layer having a first internal structure and a second internal structure, each of which include a plurality of regions having a relatively high refractive index in a region having a relatively low refractive index, sequentially from the lower part along the film thickness direction, and the regions having a relatively high refractive index in the first internal structure have a bent section at an intermediate point along the film thickness direction.
    Type: Grant
    Filed: January 4, 2019
    Date of Patent: January 28, 2020
    Assignee: LINTEC Corporation
    Inventors: Kentaro Kusama, Baku Katagiri, Kenta Tomioka, Tomoo Orui, Satoru Shoshi
  • Publication number: 20190259312
    Abstract: Provided is an interior-light-utilizing display being capable of stably maintaining constant display characteristics even in a case where an incident angle of external light changes and having improved luminance of display light in a viewing angle. Disclosed is an interior-light-utilizing display being obtained by laminating a reflection structure and a light diffusion film, in which the light diffusion film has an internal structure including a plurality of regions having a relatively high refractive index in a region having a relatively low refractive index in the film.
    Type: Application
    Filed: January 10, 2019
    Publication date: August 22, 2019
    Inventors: Kentaro KUSAMA, Tatsuki KURAMOTO
  • Publication number: 20190179060
    Abstract: Provided are an optical diffusion film composed of a single layer, for which the optical diffusion incident angle region can be effectively expanded, and even when the incident angle of incident light is varied within the optical diffusion incident angle region, changes in the optical diffusion characteristics can be effectively suppressed; and a method for manufacturing the optical diffusion film. Disclosed is an optical diffusion film having, inside the film, a single optical diffusion layer having a first internal structure and a second internal structure, each of which include a plurality of regions having a relatively high refractive index in a region having a relatively low refractive index, sequentially from the lower part along the film thickness direction, and the regions having a relatively high refractive index in the first internal structure have a bent section at an intermediate point along the film thickness direction.
    Type: Application
    Filed: January 4, 2019
    Publication date: June 13, 2019
    Inventors: Kentaro KUSAMA, Baku KATAGIRI, Kenta TOMIOKA, Tomoo ORUI, Satoru SHOSHI
  • Patent number: 10310367
    Abstract: Provided is a projection screen which can effectively diffuse incident light coming from a wide angle, despite that the number of laminated sheets of a light diffusion control film is small such as 3 to 4 sheets, and can thereby provide a wide viewing angle even if the projection screen is applied to a large-sized screen. Disclosed is a projection screen having a light diffusion control plate, the light diffusion control plate being formed by laminating a plurality of sheets of a light diffusion control film, the light diffusion control film being a light diffusion control film having a single light diffusion layer having a first internal structure and a second internal structure sequentially from the lower part along the film thickness direction, in which the first internal structure is a predetermined louver structure, and the second internal structure is a predetermined columnar structure.
    Type: Grant
    Filed: February 12, 2018
    Date of Patent: June 4, 2019
    Assignee: LINTEC CORPORATION
    Inventors: Kentaro Kusama, Baku Katagiri
  • Patent number: 10310368
    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.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: June 4, 2019
    Assignee: LINTEC CORPORATION
    Inventors: Kentaro Kusama, Baku Katagiri
  • Patent number: 10288779
    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.
    Type: Grant
    Filed: August 24, 2017
    Date of Patent: May 14, 2019
    Assignee: LINTEC Corporation
    Inventors: Kentaro Kusama, Baku Katagiri, Tomoo Orui, Satoru Shoshi
  • Patent number: 10228498
    Abstract: An optical-diffusion film for display which, particularly when applied to a display device using a collimated backlight as a backlight for the display panel, can efficiently diffuse and emit a highly directional light emitted from the collimated backlight toward the front of the display device as image display light, without allowing straight transmission of the highly directional light, and a display device using the optical-diffusion film for display are provided. Disclosed is a single layered optical-diffusion film having a columnar structure in which plural pillar-shaped objects having a relatively high refractive index are arranged to stand close together in a film thickness direction in a region having a relatively low refractive index, in which the film thickness of the optical-diffusion film has a value within the range of 60 to 700 ?m, and the haze value obtainable in the case in which light is made incident in the normal line direction of the film plane has a value of 80% or more.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: March 12, 2019
    Assignees: LINTEC CORPORATION, TOHOKU UNIVERSITY
    Inventors: Kentaro Kusama, Baku Katagiri, Tomoo Orui, Satoru Shoshi, Hideo Fujikake, Takahiro Ishinabe
  • Patent number: 10222522
    Abstract: Provided are an optical diffusion film composed of a single layer, for which the optical diffusion incident angle region can be effectively expanded, and even when the incident angle of incident light is varied within the optical diffusion incident angle region, changes in the optical diffusion characteristics can be effectively suppressed; and a method for manufacturing the optical diffusion film. Disclosed is an optical diffusion film having, inside the film, a single optical diffusion layer having a first internal structure and a second internal structure, each of which include a plurality of regions having a relatively high refractive index in a region having a relatively low refractive index, sequentially from the lower part along the film thickness direction, and the regions having a relatively high refractive index in the first internal structure have a bent section at an intermediate point along the film thickness direction.
    Type: Grant
    Filed: October 1, 2014
    Date of Patent: March 5, 2019
    Assignee: LINTEC Corporation
    Inventors: Kentaro Kusama, Baku Katagiri, Kenta Tomioka, Tomoo Orui, Satoru Shoshi
  • Patent number: 10185063
    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.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: January 22, 2019
    Assignee: LINTEC Corporation
    Inventors: Kentaro Kusama, Baku Katagiri, Tomoo Orui, Satoru Shoshi, Hideo Fujikake, Takahiro Ishinabe
  • Patent number: 10094958
    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 (?m) is the width of the flaky-shaped objects at a position of 50 ?m below the upper end of the flaky-shaped objects in the direction of the thickness of the light diffusion film, and if L50 (?m) 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<0.
    Type: Grant
    Filed: December 2, 2013
    Date of Patent: October 9, 2018
    Assignee: LINTEC Corporation
    Inventors: Baku Katagiri, Kentaro Kusama, Tomoo Orui
  • Publication number: 20180284592
    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.
    Type: Application
    Filed: February 13, 2018
    Publication date: October 4, 2018
    Inventors: Kentaro KUSAMA, Baku KATAGIRI