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).
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Publication number: 20190179060Abstract: 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: ApplicationFiled: January 4, 2019Publication date: June 13, 2019Inventors: Kentaro KUSAMA, Baku KATAGIRI, Kenta TOMIOKA, Tomoo ORUI, Satoru SHOSHI
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Patent number: 10310368Abstract: 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: GrantFiled: February 13, 2018Date of Patent: June 4, 2019Assignee: LINTEC CORPORATIONInventors: Kentaro Kusama, Baku Katagiri
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Patent number: 10310367Abstract: 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: GrantFiled: February 12, 2018Date of Patent: June 4, 2019Assignee: LINTEC CORPORATIONInventors: Kentaro Kusama, Baku Katagiri
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Patent number: 10288779Abstract: 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: GrantFiled: August 24, 2017Date of Patent: May 14, 2019Assignee: LINTEC CorporationInventors: Kentaro Kusama, Baku Katagiri, Tomoo Orui, Satoru Shoshi
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Patent number: 10228498Abstract: 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: GrantFiled: March 13, 2014Date of Patent: March 12, 2019Assignees: LINTEC CORPORATION, TOHOKU UNIVERSITYInventors: Kentaro Kusama, Baku Katagiri, Tomoo Orui, Satoru Shoshi, Hideo Fujikake, Takahiro Ishinabe
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Patent number: 10222522Abstract: 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: GrantFiled: October 1, 2014Date of Patent: March 5, 2019Assignee: LINTEC CorporationInventors: Kentaro Kusama, Baku Katagiri, Kenta Tomioka, Tomoo Orui, Satoru Shoshi
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Patent number: 10185063Abstract: 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: GrantFiled: March 13, 2014Date of Patent: January 22, 2019Assignee: LINTEC CorporationInventors: Kentaro Kusama, Baku Katagiri, Tomoo Orui, Satoru Shoshi, Hideo Fujikake, Takahiro Ishinabe
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Patent number: 10094958Abstract: 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: GrantFiled: December 2, 2013Date of Patent: October 9, 2018Assignee: LINTEC CorporationInventors: Baku Katagiri, Kentaro Kusama, Tomoo Orui
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Publication number: 20180284592Abstract: 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: ApplicationFiled: February 13, 2018Publication date: October 4, 2018Inventors: Kentaro KUSAMA, Baku KATAGIRI
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Publication number: 20180284591Abstract: 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: ApplicationFiled: February 12, 2018Publication date: October 4, 2018Inventors: Kentaro KUSAMA, Baku KATAGIRI
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Patent number: 9945990Abstract: A light diffusion film in which the angle of aperture of diffused light has been expanded effectively by forming, within the film, a predetermined columnar structure composed of pillar-shaped objects having a bent part and a region having a relatively low refractive index, and a method for manufacturing the light diffusion film are provided. Disclosed is a light 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 the film thickness direction in a region having a relatively low refractive index, and the plural pillar-shaped objects having a relatively high refractive index have a bent part in the middle of the pillar-shaped objects.Type: GrantFiled: February 25, 2014Date of Patent: April 17, 2018Assignee: LINTEC CorporationInventors: Kentaro Kusama, Baku Katagiri, Tomoo Orui, Satoru Shoshi
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Patent number: 9869803Abstract: Provided are a composition for light diffusion film which has satisfactory incident angle dependency in transmission and diffusion of light, does not easily undergo yellowing even if exposed to ultraviolet radiation for a long time, and has excellent weather resistance, and a light diffusion film formed by curing the composition.Type: GrantFiled: February 4, 2014Date of Patent: January 16, 2018Assignee: LINTEC CorporationInventors: Kentaro Kusama, Baku Katagiri, Tomoo Orui
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Publication number: 20170351010Abstract: 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: ApplicationFiled: August 24, 2017Publication date: December 7, 2017Inventors: Kentaro Kusama, Baku Katagiri, Tomoo Orui, Satoru Shoshi
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Publication number: 20170293054Abstract: 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: ApplicationFiled: October 1, 2014Publication date: October 12, 2017Inventors: Kentaro KUSAMA, Baku KATAGIRI, Kenta TOMIOKA, Tomoo ORUI, Satoru SHOSHI
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Patent number: 9753191Abstract: 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: GrantFiled: February 25, 2014Date of Patent: September 5, 2017Assignee: LINTEC CorporationInventors: Kentaro Kusama, Baku Katagiri, Tomoo Orui, Satoru Shoshi
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Patent number: 9632217Abstract: 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.Type: GrantFiled: February 4, 2014Date of Patent: April 25, 2017Assignee: LINTEC CorporationInventors: Kentaro Kusama, Baku Katagiri, Tomoo Orui, Satoru Shoshi
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Patent number: 9523799Abstract: A method for producing a light diffusion film having first and second louver structure regions includes the following steps (a) to (d): (a) preparing a composition for light diffusion film; (b) applying the composition for light diffusion film, and forming a coating layer; (c) performing first active energy ray irradiation, and forming a first louver structure region in the lower part of the coating layer, while leaving a louver structure-unformed region in the upper part of the coating layer; and (d) performing second active energy ray irradiation, and forming a second louver structure region in the louver structure-unformed region.Type: GrantFiled: December 20, 2012Date of Patent: December 20, 2016Assignee: LINTEC CORPORATIONInventors: Kentaro Kusama, Tomoo Orui, Kenta Tomioka, Satoru Shoshi
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Patent number: 9519086Abstract: An anisotropic light diffusion film includes increased uniformity of the intensity of diffused light in the light diffusion angle region, and the light diffusion angle region has been effectively expanded. An anisotropic light diffusion film includes a first louver structure region and a second louver structure region, in which plural plate-shaped regions having different refractive indices are alternately arranged in parallel along any one direction along the film plane, sequentially from the lower side along the film thickness direction, and the anisotropic light diffusion film includes an overlapping louver structure region in which the upper end of the first louver structure region and the lower end of the second louver structure region overlap each other.Type: GrantFiled: December 20, 2012Date of Patent: December 13, 2016Assignee: LINTEC CORPORATIONInventors: Kentaro Kusama, Tomoo Orui, Kenta Tomioka, Satoru Shoshi
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Publication number: 20160077246Abstract: 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: ApplicationFiled: March 13, 2014Publication date: March 17, 2016Inventors: Kentaro KUSAMA, Baku KATAGIRI, Tomoo ORUI, Satoru SHOSHI, Hideo FUJIKAKE, Takahiro ISHINABE
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Publication number: 20160070035Abstract: 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: ApplicationFiled: March 13, 2014Publication date: March 10, 2016Inventors: Kentaro KUSAMA, Baku KATAGIRI, Tomoo ORUI, Satoru SHOSHI, Hideo FUJIKAKE, Takahiro ISHINABE