Patents by Inventor Eizaburo Higuchi
Eizaburo Higuchi 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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Patent number: 10206762Abstract: Disclosed is a material for a denture base containing a polymer component and containing an acrylic resin.Type: GrantFiled: June 20, 2018Date of Patent: February 19, 2019Assignees: Mitsui Chemicals, Inc., NITTO JUSHI KOGYO CO., LTD.Inventors: Osamu Kohgo, Naoyuki Kato, Maho Okumura, Ahmad Jalaludin, Kouya Kojima, Eizaburo Higuchi, Yuji Takahashi
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Patent number: 10117731Abstract: Disclosed is a material for a denture base containing a polymer component having a weight average molecular weight of 1,200,000 or more and containing an acrylic resin.Type: GrantFiled: February 4, 2015Date of Patent: November 6, 2018Assignees: Mitsui Chemicals, Inc., NITTO JUSHI KOGYO CO., LTD.Inventors: Osamu Kohgo, Naoyuki Kato, Maho Okumura, Ahmad Jalaludin, Kouya Kojima, Eizaburo Higuchi, Yuji Takahashi
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Publication number: 20180296306Abstract: Disclosed is a material for a denture base containing a polymer component and containing an acrylic resin.Type: ApplicationFiled: June 20, 2018Publication date: October 18, 2018Inventors: Osamu KOHGO, Naoyuki KATO, Maho OKUMURA, Ahmad JALALUDIN, Kouya KOJIMA, Eizaburo HIGUCHI, Yuji TAKAHASHI
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Publication number: 20170071708Abstract: Disclosed is a material for a denture base containing a polymer component having a weight average molecular weight of 1,200,000 or more and containing an acrylic resin.Type: ApplicationFiled: February 4, 2015Publication date: March 16, 2017Inventors: Osamu KOHGO, Naoyuki KATO, Maho OKUMURA, Ahmad JALALUDIN, Kouya KOJIMA, Eizaburo HIGUCHI, Yuji Martinez TAKAHASHI
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Patent number: 9261731Abstract: A liquid crystal display apparatus comprises: a liquid crystal display panel including a liquid crystal cell between a first polarizing plate and a second polarizing plate; and a surface light source device having a light source unit and a light guide plate. In a polarized light output from the light guide plate, when the normal direction of a light output surface is defined to be at a polar angle of 90°, and the light guiding direction of the light guide plate is defined to be a direction of an azimuth angle of 0°-180°, a ratio La/Lt of integrated intensity La of output light in ranges where the polar angle is 50° to 80° and the azimuth angle is 135° to 225°, 0° to 45°, and 315° to 360° to integrated intensity Lt of total output light is 0.3 or more.Type: GrantFiled: February 14, 2013Date of Patent: February 16, 2016Assignees: KEIO UNIVERSITY, NITTO DENKO CORPORATION, DAI NIPPON PRINTING CO., LTD., NITTO JUSHI KOGYO CO., LTD.Inventors: Yasuhiro Koike, Takehito Fuchida, Shouhei Maezawa, Hiroyuki Takemoto, Nao Murakami, Runa Nakamura, Fumihiro Arakawa, Hiroshi Yamamoto, Tsuyoshi Ishikawa, Eizaburo Higuchi
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Patent number: 9261640Abstract: A liquid crystal display apparatus includes a liquid crystal display panel including a liquid crystal cell between first second polarizing plates; and a surface light source device. The surface light source device includes a light source unit, a light guide plate for outputting first directivity light having directivity of maximum intensity in a first direction, which forms a predetermined angle from a normal direction of the light output surface in a plane approximately parallel to a light guiding direction of light, and having a high ratio of a polarized light component oscillating in the plane and a prism sheet being configured to convert the first directivity light into second directivity light directed in a second direction within a predetermined angle from the normal direction of the light output surface of the light guide plate while substantially maintaining a polarization state of the first directivity light.Type: GrantFiled: February 14, 2013Date of Patent: February 16, 2016Assignees: KEIO UNIVERSITY, DAI NIPPON PRINTING CO., LTD., NITTO DENKO CORPORATION, NITTO JUSHI KOGYO CO., LTD.Inventors: Yasuhiro Koike, Runa Nakamura, Fumihiro Arakawa, Hiroshi Yamamoto, Takehito Fuchida, Shouhei Maezawa, Hiroyuki Takemoto, Nao Murakami, Tsuyoshi Ishikawa, Eizaburo Higuchi
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Publication number: 20150301384Abstract: A liquid crystal display apparatus comprises: a liquid crystal display panel including a liquid crystal cell between a first polarizing plate and a second polarizing plate; and a surface light source device having a light source unit and a light guide plate. In a polarized light output from the light guide plate, when the normal direction of a light output surface is defined to be at a polar angle of 90°, and the light guiding direction of the light guide plate is defined to be a direction of an azimuth angle of 0°-180°, a ratio La/Lt of integrated intensity La of output light in ranges where the polar angle is 50° to 80° and the azimuth angle is 135° to 225°, 0° to 45°, and 315° to 360° to integrated intensity Lt of total output light is 0.3 or more.Type: ApplicationFiled: February 14, 2013Publication date: October 22, 2015Applicants: KEIO UNIVERSITY, NITTO DENKO CORPORATION, DAI NIPPON PRINTING CO., LTD., NITTO JUSHI KOGYO CO., LTD.Inventors: Yasuhiro Koike, Takehito Fuchida, Shouhei Maezawa, Hiroyuki Takemoto, Nao Murakami, Runa Nakamura, Fumihiro Arakawa, Hiroshi Yamamoto, Tsuyoshi Ishikawa, Eizaburo Higuchi
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Publication number: 20150029442Abstract: A liquid crystal display apparatus includes a liquid crystal display panel including a liquid crystal cell between first second polarizing plates; and a surface light source device. The surface light source device includes a light source unit, a light guide plate for outputting first directivity light having directivity of maximum intensity in a first direction, which forms a predetermined angle from a normal direction of the light output surface in a plane approximately parallel to a light guiding direction of light, and having a high ratio of a polarized light component oscillating in the plane and a prism sheet being configured to convert the first directivity light into second directivity light directed in a second direction within a predetermined angle from the normal direction of the light output surface of the light guide plate while substantially maintaining a polarization state of the first directivity light.Type: ApplicationFiled: February 14, 2013Publication date: January 29, 2015Applicants: KEIO UNIVERSITY, DAI NIPPON PRINTING CO., LTD., NITTO DENKO CORPORATION, NITTO JUSHI KOGYO CO., LTD.Inventors: Yasuhiro Koike, Runa Nakamura, Fumihiro Arakawa, Hiroshi Yamamoto, Takehito Fuchida, Shouhei Maezawa, Hiroyuki Takemoto, Nao Murakami, Tsuyoshi Ishikawa, Eizaburo Higuchi
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Patent number: 8297824Abstract: To solve an uneven light quantity caused in a case where a light guide plate, in which light from a spot light source such as an LED enters an surface, changes by 90 degrees and exits the light to the outside, is used as a backlight. The light guide plate of the invention includes a light flux unifying region. The light flux unifying region has an incident surface, a first surface, and an exit surface. Light fluxes emitted from a light source enter the incident surface. The first surface is almost perpendicular to the incident surface and the intensity distribution of the light fluxes having entered is unified at the first surface. The exit surface is disposed almost parallel with the incident surface and the unified light fluxes exit from the exit surface. A boundary line between the incident surface and the first surface has a zigzag surface.Type: GrantFiled: December 2, 2009Date of Patent: October 30, 2012Assignees: Panasonic Corporation, Nitto Jushi Kogyo Co., Ltd.Inventors: Toshihisa Saito, Masaru Furujiku, Tsuyoshi Ishikawa, Eizaburo Higuchi
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Publication number: 20100172150Abstract: To solve an uneven light quantity caused in a case where a light guide plate, in which light from a spot light source such as an LED enters an surface, changes by 90 degrees and exits the light to the outside, is used as a backlight. The light guide plate of the invention includes a light flux unifying region. The light flux unifying region has an incident surface, a first surface, and an exit surface. Light fluxes emitted from a light source enter the incident surface. The first surface is almost perpendicular to the incident surface and the intensity distribution of the light fluxes having entered is unified at the first surface. The exit surface is disposed almost parallel with the incident surface and the unified light fluxes exit from the exit surface. A boundary line between the incident surface and the first surface has a zigzag surface.Type: ApplicationFiled: December 2, 2009Publication date: July 8, 2010Inventors: Toshihisa Saito, Masaru Furujiku, Tsuyoshi Ishikawa, Eizaburo Higuchi
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Patent number: 6241358Abstract: A set of light guide blocks B L 1˜B L 3 provide a tandem arrangement. The light guide block B L 1 is supplied with light from a primary light source L 1. The other primary light sources L 2, L 3 are arranged in recesses formed around distal portions of the light guide blocks B L 1, B L 2, supplying the light guide blocks B L 2, B L 3 with primary light, respectively. Overlap of mutually neighboring light guide blocks gives tang-shaped overlapping portions 17a, 17b, 27a, 27b as well as overlapping bands 17c, 27c, thereby avoiding electrodes at both ends of the primary light sources L 2, L 3 from causing short of brightness. The light guide blocks B L 1˜B L 3 may be in the form of unified single guide plate. Primary light sources L 1˜L 3 may have a shape such that electrode sections of both ends are curved. A compact surface light source device with a large emission area is provided.Type: GrantFiled: November 12, 1999Date of Patent: June 5, 2001Assignees: Nitto Jushi Kogyo Kabushiki Kaisha, Yasuhiro KoikeInventors: Eizaburo Higuchi, Tsuyoshi Ishikawa, Akihiro Horibe
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Patent number: 6222689Abstract: An asymmetric prism sheet, surface light source and LCD to which the asymmetric prism sheet is applied is provided. A cold cathode tube backed by a reflector supplies light to an incidence surface of a directional emission guide plate. A polarization separation sheet and a liquid crystal panel are disposed outside of the asymmetric prism sheet, with the reflector disposed along a back face. First and second slopes of each asymmetric prism element rows have inclination angles &phgr;a, &phgr;b which are selected as to allow a secondary ray to exist inside a main ray emitted from a frontal face in a manner such that the main ray is deflected toward a generally frontal direction by way of internal reflection of the second slope while the secondary ray is deflected toward a generally frontal direction by way of double internal reflection of the first and second slopes. An outer face provides an uneven face such as non-glare-processed face, orthogonal prismatic face or lens face.Type: GrantFiled: October 28, 1998Date of Patent: April 24, 2001Assignees: Enplas Corporation, Nitto Jushi Kogyo Kabushiki KaishaInventors: Eizaburo Higuchi, Yasuhiro Koike
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Patent number: 5966192Abstract: Provided are a surface light source device whose bright surface is excellent in whiteness and softness and a liquid crystal display that ensures a high visual quality. A relatively thick side end surface of a light scattering guide 1, which has a wedge-shaped profile, forms an incidence surface 2. A fluorescent lamp L is located in the vicinity of the incidence surface 2, and a silver foil R is arranged around it. A prism sheet 4 is located outside an exit surface 5. The orientation of the prism sheet 4 is selected so that the running direction of prismatic rows is in line with the transverse direction of the light scattering guide 1. The prismatic surface may be directed inward or outward. A prism sheet 8 is interposed between a back surface 6 of the light scattering guide 1 and a reflector (silver foil) 3. The prism sheet 8 is arranged so that its prismatic surface is directed inward.Type: GrantFiled: November 4, 1996Date of Patent: October 12, 1999Assignee: Nitto Jushi Kogyo Kabushiki kaishaInventors: Eizaburo Higuchi, Yasuhiro Koike
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Patent number: 5914759Abstract: A fluorescent lamp L is arranged in the vicinity of an incidence surface 2 of a light scattering guide plate 1. A prism sheet 4' having rows of prism elements and rows of lens elements on each side is arranged outside an exiting surface 5. The angles of inclination of slopes 4a and 4b satisfy a condition that .phi.a>.phi.b. The slopes 4a and 4b extend in the transverse direction of the light scattering guide plate 1, and slopes 4c and 4d extend in the longitudinal direction. A reflector 3 is arranged along a rear surface 6. Light emitted from the exiting surface 5 is efficiently propagated by an inner prism surface toward a forward direction, shifted in the transverse direction by an outer prism surface or the lens element surfaces 4c and 4d, and is then returned inwardly. The path histories of light emitted from the prism sheet 4' is diversified to improve visual characteristics.Type: GrantFiled: September 30, 1997Date of Patent: June 22, 1999Assignee: Nitto Jushi Kogyo Kabushiki KaishaInventors: Eizaburo Higuchi, Yasuhiro Koike
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Patent number: 5887964Abstract: There is provided a surface light source device which is excellent in whiteness and softness of a luminant surface and able to retain reflective appearance from occurring. The surface light source device is effectively applied to back lighting in a liquid crystal display. A fluorescent lamp (L) is disposed in the vicinity of an incidence surface (2) of a light guide plate (1). A prism sheet (4') having prism surfaces formed on both surfaces is disposed along an exiting surface (5). The prism sheet (4') is oriented such that prism rows (4a, 4b) on the inside surface run in the transverse direction of the light guide plate (1) while prism rows (4c, 4d) on the outside surface run in the longitudinal direction of the light guide plate (1). A reflector (3) is disposed along a back surface (6) of the light guide plate (1).Type: GrantFiled: June 9, 1997Date of Patent: March 30, 1999Assignees: Nitto Jushi Kogyo Kabushiki Kaisha, Yasuhiro KoikeInventors: Eizaburo Higuchi, Yasuhiro Koike