Patents by Inventor Baku Katagiri

Baku Katagiri 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: 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
  • Patent number: 9945990
    Abstract: 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: Grant
    Filed: February 25, 2014
    Date of Patent: April 17, 2018
    Assignee: LINTEC Corporation
    Inventors: Kentaro Kusama, Baku Katagiri, Tomoo Orui, Satoru Shoshi
  • Patent number: 9869803
    Abstract: 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: Grant
    Filed: February 4, 2014
    Date of Patent: January 16, 2018
    Assignee: LINTEC Corporation
    Inventors: Kentaro Kusama, Baku Katagiri, Tomoo Orui
  • Publication number: 20170349790
    Abstract: Provided are a surface protection film which would stably display an image, and would stably attain a mirror state, and which would be stably operated without inhibiting display operability. Disclosed is a surface protection film including a resin film and a pressure-sensitive adhesive layer, in which the relative permittivity of the resin film is of 1.0 to 5.0, the reflectance is set to a value within the range of 20% to 80%, and the transmittance for light is of 20% to 80%.
    Type: Application
    Filed: July 17, 2015
    Publication date: December 7, 2017
    Applicant: LINTEC Corporation
    Inventors: Masaya TODAKA, Baku KATAGIRI, Kenta TOMIOKA, Tomoo ORUI
  • Publication number: 20170351010
    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: Application
    Filed: August 24, 2017
    Publication date: December 7, 2017
    Inventors: Kentaro Kusama, Baku Katagiri, Tomoo Orui, Satoru Shoshi
  • Publication number: 20170293054
    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: October 1, 2014
    Publication date: October 12, 2017
    Inventors: Kentaro KUSAMA, Baku KATAGIRI, Kenta TOMIOKA, Tomoo ORUI, Satoru SHOSHI
  • Patent number: 9753191
    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: February 25, 2014
    Date of Patent: September 5, 2017
    Assignee: LINTEC Corporation
    Inventors: Kentaro Kusama, Baku Katagiri, Tomoo Orui, Satoru Shoshi
  • Patent number: 9632217
    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.
    Type: Grant
    Filed: February 4, 2014
    Date of Patent: April 25, 2017
    Assignee: LINTEC Corporation
    Inventors: Kentaro Kusama, Baku Katagiri, Tomoo Orui, Satoru Shoshi
  • Publication number: 20160077246
    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: Application
    Filed: March 13, 2014
    Publication date: March 17, 2016
    Inventors: Kentaro KUSAMA, Baku KATAGIRI, Tomoo ORUI, Satoru SHOSHI, Hideo FUJIKAKE, Takahiro ISHINABE
  • Publication number: 20160070035
    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: Application
    Filed: March 13, 2014
    Publication date: March 10, 2016
    Inventors: Kentaro KUSAMA, Baku KATAGIRI, Tomoo ORUI, Satoru SHOSHI, Hideo FUJIKAKE, Takahiro ISHINABE
  • Publication number: 20160047952
    Abstract: 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: Application
    Filed: February 25, 2014
    Publication date: February 18, 2016
    Inventors: Kentaro KUSAMA, Baku KATAGIRI, Tomoo ORUI, Satoru SHOSHI
  • Publication number: 20160033692
    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.
    Type: Application
    Filed: February 4, 2014
    Publication date: February 4, 2016
    Inventors: Kentaro KUSAMA, Baku KATAGIRI, Tomoo ORUI, Satoru SHOSHI
  • Publication number: 20160025907
    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: Application
    Filed: February 25, 2014
    Publication date: January 28, 2016
    Inventors: Kentaro KUSAMA, Baku KATAGIRI, Tomoo ORUI, Satoru SHOSHI
  • Publication number: 20160018571
    Abstract: 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: Application
    Filed: February 4, 2014
    Publication date: January 21, 2016
    Inventors: Kentaro KUSAMA, Baku KATAGIRI, Tomoo ORUI
  • Publication number: 20150355390
    Abstract: There is provided a light diffusion film capable of diffusing incident light into an elliptical shape with respect to a plane parallel to the light diffusion film, and which has excellent applicability to rectangular displays. 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: Application
    Filed: December 2, 2013
    Publication date: December 10, 2015
    Inventors: Baku KATAGIRI, Kentaro KUSAMA, Tomoo ORUI
  • Patent number: 9122097
    Abstract: A backlight system (30) includes a light emitting section (31) and an imaging optical system. The imaging optical system includes a first microlens array (MLA1) and a second microlens array (MLA2). The lenses (1A) separates the beams of light emitted from the light emitting section (31) by RGB, and causes them to be converged at a pitch same as a pitch at which the picture elements are arrayed. The lenses (2A) are provided in one-to-one correspondence to the picture elements such that the lenses (2A) have their respective focal points at positions onto which beams of light having passed through the lenses (1A) are converged. The lenses (2A) thus deflect the beams of light which have passed through the lenses (1A) in a substantially vertical direction with respect to the display surface of the liquid crystal panel.
    Type: Grant
    Filed: December 22, 2010
    Date of Patent: September 1, 2015
    Assignees: Sharp Kabushiki Kaisha, Tohoku University
    Inventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Kazuo Sekiya, Masahiro Nishizawa, Takahiro Ishinabe, Baku Katagiri, Katsunori Ehara, Yoshihiro Hashimoto, Shoichi Ishihara, Shuichi Kozaki, Yutaka Ishii
  • Patent number: 8922735
    Abstract: A backlight system includes: a light-emitting section (1) having a plurality of light sources that emit beams of light at different dominant wavelengths from one another; and an imaging optical system (3) including a plurality of microlenses (3a) that focus beams of light emitted from the light-emitting section (1), the backlight system irradiating a liquid crystal panel with beams of light having passed through the imaging optical system (3), the liquid crystal panel including a plurality of pixels arrayed at a predetermined pitch from each other, on the assumption that the pitch at which the pixels are arrayed is denoted as P and the imaging optical system (3) has an imaging magnification of (1/n), the light sources (1) being arrayed at a pitch (P1) given as P1=n×P, the microlenses (3a) being arrayed at a pitch (P2) given as P2=(n/(n+1))×P.
    Type: Grant
    Filed: June 2, 2010
    Date of Patent: December 30, 2014
    Assignees: Sharp Kabushiki Kaisha, Tohoku University
    Inventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Kazuo Sekiya, Masahiro Nishizawa, Takahiro Ishinabe, Baku Katagiri, Yoshihiro Hashimoto, Shoichi Ishihara, Shuichi Kozaki, Yutaka Ishii
  • Patent number: 8810752
    Abstract: A thin backlight system includes: a light emitting section emitting lights that have different dominant wavelengths; and a plurality of light transmitting portions, the thin backlight system deflecting the lights and then converging the lights on the plurality of light transmitting portions. The thin backlight system further includes: an imaging optical system provided to face surfaces, of the plurality of light transmitting portions, on which the lights are converged. The imaging optical system including a plurality of identical lenses arranged in a vertical and/or a horizontal direction at a pitch determined by multiplying a pitch at which the plurality of light transmitting portions are arranged in a vertical and/or a horizontal direction by the number of types of the different dominant wavelengths and being configured to converge the lights from the light emitting section on light transmitting portions to which the different dominant wavelengths of the lights correspond.
    Type: Grant
    Filed: October 21, 2009
    Date of Patent: August 19, 2014
    Assignees: Sharp Kabushiki Kaisha, Tohoku University
    Inventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Kazuo Sekiya, Takahiro Ishinabe, Baku Katagiri, Yoshihiro Hashimoto, Shoichi Ishihara, Shuichi Kozaki, Yutaka Ishii
  • Patent number: 8780444
    Abstract: A screen in which observation distance may be adjusted while maintaining image brightness and a projection system using the screen. In a light control layer of a screen, a first angle region that determines a diffusion distribution of a reflected light is different according to the screen position in a control direction in which light diffusion control is performed. Accordingly, a diffusion distribution of image light emitted from a screen surface is adjusted to be tilted downward by an upper end and upward by a lower end according to the screen position. Thus, for example, a size of a diffused angle range is maintained to be 30°, and a direction in which the image light is diffusion-emitted corresponds to an assumed position of an observer. The projection image can be observed while maintaining brightness of an image and the observation distance L can be adjusted to be short.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: July 15, 2014
    Assignees: Seiko Epson Corporation, Tohoku University
    Inventors: Osamu Arakawa, Hiroyuki Shindo, Toshiaki Hashizume, Tatsuo Uchida, Yoshito Suzuki, Baku Katagiri
  • Patent number: 8654442
    Abstract: A screen which reflects light emitted from a projector includes a light diffusion layer through which light incident from a specific angular region is diffused and transmitted and through which light incident from the other angular region is transmitted straight; area pairs having a mirror forming area and a non-mirror forming area; a light transmissive layer having a back surface, on which the area pairs are disposed, and an opposite surface being bonded to a back side of the light diffusion layer; and a specular reflection film formed on a back surface of each mirror forming area. An inclination of the mirror forming area with respect to a normal line of the screen close to the projector becomes larger than the inclination of the mirror forming area far from the projector within a cross section perpendicular to the mirror forming areas inside the screen.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: February 18, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Tatsuo Uchida, Yoshito Suzuki, Baku Katagiri, Toshiaki Hashizume, Hiroyuki Shindo, Osamu Arakawa