Patents by Inventor Tatsuki KURAMOTO

Tatsuki KURAMOTO 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).

  • Patent number: 11467323
    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: Grant
    Filed: March 5, 2021
    Date of Patent: October 11, 2022
    Assignee: LINTEC CORPORATION
    Inventors: Tatsuki Kuramoto, Kentaro Kusama, Baku Katagiri
  • Publication number: 20220317507
    Abstract: An external light use type display body including: a light diffusion control layer; a display layer; and a reflective layer. The light diffusion control layer has a regular internal structure that comprises a plurality of regions having a relatively high refractive index in a region having a relatively low refractive index. The reflective layer has a patterned indented structure when at least one cross section cut in a thickness direction is viewed. When the entrance plane is irradiated with light rays that travel on the light ray traveling plane with a predetermined incident angle while being scanned along an intersection line of the light ray traveling plane and the entrance plane, the ratio of the light rays satisfying the following Formula (1) or Formula (2) is 50% or more.
    Type: Application
    Filed: March 30, 2022
    Publication date: October 6, 2022
    Applicant: LINTEC CORPORATION
    Inventors: Baku KATAGIRI, Kentaro KUSAMA, Tatsuki KURAMOTO
  • Patent number: 11422401
    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: Grant
    Filed: February 24, 2020
    Date of Patent: August 23, 2022
    Assignee: LINTEC CORPORATION
    Inventors: Tatsuki Kuramoto, Kentaro Kusama, Baku Katagiri
  • 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
  • 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