Patents by Inventor Yasuhisa Itoh

Yasuhisa Itoh 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: 20240127982
    Abstract: An information processing apparatus includes a converting portion having a plurality of electrical conductors to be arranged in mutual separation and a medium arranged so as to mutually connect the plurality of electrical conductors, wherein the converting portion is the information processing apparatus to convert an input signal to an output signal. The medium includes the electrolyte and is configured to be capable of controlling an electrical conductivity of an electrically conductive path mutually electrically connecting the plurality of electrical conductors, and the medium is selected such that the electrical conductivity of the electrically conductive path changes over time with the input signal not being present.
    Type: Application
    Filed: January 27, 2022
    Publication date: April 18, 2024
    Applicants: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, TOKYO UNIVERSITY OF SCIENCE FOUNDATION, TOYOTA PHYSICAL AND CHEMICAL RESEARCH INSTITUTE, NATIONAL UNIVERSITY CORPORATION TOTTORI UNIVERSITY, NAGASE & CO., LTD.
    Inventors: Hiroyuki AKINAGA, Hisashi SHIMA, Yasuhisa NAITOH, Hiroshi SATOU, Dan SATOU, Takuma MATSUO, Kentaro KINOSHITA, Toshiyuki ITOH, Toshiki NOKAMI, Masakazu KOBAYASHI
  • Patent number: 11054695
    Abstract: A chip-mounted board including: micro light-emitting chips arranged in a matrix pattern in a light-emitting region; and a conductive line electrically connected to the micro light-emitting chips, the light-emitting region including a first region having a first luminance, a second region having a second luminance lower than the first luminance, and a third region having a third luminance lower than the first luminance and higher than the second luminance, the luminances being values determined with the same magnitude of current supplied to the micro light-emitting chips, the third region being positioned between the first region and the second region and satisfying the following formulas (1) and (2): (1+k)/(1?k)?63.895×tan(0.5°)×500/W+6.0525??(1) L2=k×L1??(2) wherein L1 represents the first luminance, L2 represents the second luminance, and W represents a width (unit: mm) of the third region.
    Type: Grant
    Filed: July 10, 2019
    Date of Patent: July 6, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Taimi Oketani, Atsushi Ban, Yasuhisa Itoh, Takeshi Ishida
  • Publication number: 20200019016
    Abstract: A chip-mounted board including: micro light-emitting chips arranged in a matrix pattern in a light-emitting region; and a conductive line electrically connected to the micro light-emitting chips, the light-emitting region including a first region having a first luminance, a second region having a second luminance lower than the first luminance, and a third region having a third luminance lower than the first luminance and higher than the second luminance, the luminances being values determined with the same magnitude of current supplied to the micro light-emitting chips, the third region being positioned between the first region and the second region and satisfying the following formulas (1) and (2): (1+k)/(1?k)?63.895×tan(0.5°)×500/W+6.0525??(1) L2=k×L1??(2) wherein L1 represents the first luminance, L2 represents the second luminance, and W represents a width (unit: mm) of the third region.
    Type: Application
    Filed: July 10, 2019
    Publication date: January 16, 2020
    Inventors: Taimi Oketani, Atsushi Ban, Yasuhisa Itoh, Takeshi Ishida
  • Patent number: 9939127
    Abstract: A lighting device (100) includes: a surface light source (1); a first lens (L1) having a first focal point (F1), the first lens being provided on the light exit surface side of the surface light source; and a second lens (L2) having a second focal point (F2), the second lens being provided on a light exit surface side of the first lens, the surface light source, the first lens, and the second lens being configured such that a first virtual image (I1) is formed by the first lens and a second virtual image (I2) is formed by the second lens, wherein the first virtual image (I1) is formed between the second focal point (F2) and the first lens, and the second focal point (F2) is on a side opposite to the light source side relative to a predetermined focal position f?.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: April 10, 2018
    Assignees: Sharp Kabushiki Kaisha, TOHOKU UNIVERSITY
    Inventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Takahiro Ishinabe, Katsunori Ehara, Yoshihiro Hashimoto, Toshiki Matsuoka, Kozo Nakamura, Yasuhisa Itoh, Yoshitaka Yamamoto, Yutaka Ishii, David Montgomery
  • Patent number: 9310619
    Abstract: To provide a thin optical sheet having improved efficiency for light utilization, an optical sheet (5) of one mode of the present invention includes, in sequence from a light entry side to a light emission side, a plurality of first prisms (13), a ¼ wavelength plate (11), and a polarized-light separating element (12), the plurality of first prisms (13) each having (i) a first surface (13a) through which light enters the first prism and (ii) a second surface (13b) that reflects the light, having entered the first prism, toward the light emission side, the optical film further including, between the plurality of first prisms in an in-plane direction of the optical film, a second prism (14) that reflects light.
    Type: Grant
    Filed: February 15, 2013
    Date of Patent: April 12, 2016
    Assignees: Sharp Kabushiki Kaisha, Tohoku University
    Inventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Kazuo Sekiya, Masahiro Nishizawa, Takahiro Ishinabe, Katsunori Ehara, Yoshihiro Hashimoto, Yasuhisa Itoh, Yoshitaka Yamamoto, Yutaka Ishii
  • Patent number: 9217552
    Abstract: A lighting device (100) includes: a surface light source (1); a first lens (L1) having a first focal point (F1), the first lens being provided on the light exit surface side of the surface light source; and a second lens (L2) having a second focal point (F2), the second lens being provided on a light exit surface side of the first lens, the surface light source, the first lens, and the second lens being configured such that a first virtual image (I1) is formed by the first lens and a second virtual image (I2) is formed by the second lens, wherein the first virtual image (I1) is formed between the second focal point (F2) and the first lens, the second focal point (F2) is on a side opposite to the light source side relative to a predetermined focal position f?, and at least either of a light entry surface or a light exit surface of the first lens or the second lens includes a non-revolution surface (SO) as a lens surface, and a plurality of boundary lines (B1-B4) whose curvatures vary discontinuously are provid
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: December 22, 2015
    Assignees: Sharp Kabushiki Kaisha, Tohoku University
    Inventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Takahiro Ishinabe, Katsunori Ehara, Yoshihiro Hashimoto, Toshiki Matsuoka, Kozo Nakamura, Yasuhisa Itoh, Yoshitaka Yamamoto, Yutaka Ishii
  • Publication number: 20150211709
    Abstract: A lighting device (100) includes: a surface light source (1); a first lens (L1) having a first focal point (F1), the first lens being provided on the light exit surface side of the surface light source; and a second lens (L2) having a second focal point (F2), the second lens being provided on a light exit surface side of the first lens, the surface light source, the first lens, and the second lens being configured such that a first virtual image (I1) is formed by the first lens and a second virtual image (I2) is formed by the second lens, wherein the first virtual image (I1) is formed between the second focal point (F2) and the first lens, and the second focal point (F2) is on a side opposite to the light source side relative to a predetermined focal position f?.
    Type: Application
    Filed: July 26, 2013
    Publication date: July 30, 2015
    Applicants: Sharp Kabushiki Kaisha, TOHOKU UNIVERSITY
    Inventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Takahiro Ishinabe, Katsunori Ehara, Yoshihiro Hashimoto, Toshiki Matsuoka, Kozo Nakamura, Yasuhisa Itoh, Yoshitaka Yamamoto, Yutaka Ishii, David Montgomery
  • Publication number: 20150167924
    Abstract: A lighting device (100) includes: a surface light source (1); a first lens (L1) having a first focal point (F1), the first lens being provided on the light exit surface side of the surface light source; and a second lens (L2) having a second focal point (F2), the second lens being provided on a light exit surface side of the first lens, the surface light source, the first lens, and the second lens being configured such that a first virtual image (I1) is formed by the first lens and a second virtual image (I2) is formed by the second lens, wherein the first virtual image (I1) is formed between the second focal point (F2) and the first lens, the second focal point (F2) is on a side opposite to the light source side relative to a predetermined focal position f?, and at least either of a light entry surface or a light exit surface of the first lens or the second lens includes a non-revolution surface (SO) as a lens surface, and a plurality of boundary lines (B1-B4) whose curvatures vary discontinuously are provid
    Type: Application
    Filed: July 2, 2013
    Publication date: June 18, 2015
    Inventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Takahiro Ishinabe, Katsunori Ehara, Yoshihiro Hashimoto, Toshiki Matsuoka, Kozo Nakamura, Yasuhisa Itoh, Yoshitaka Yamamoto, Yutaka Ishii
  • Publication number: 20150036215
    Abstract: To provide a thin optical sheet having improved efficiency for light utilization, an optical sheet (5) of one mode of the present invention includes, in sequence from a light entry side to a light emission side, a plurality of first prisms (13), a ¼ wavelength plate (11), and a polarized-light separating element (12), the plurality of first prisms (13) each having (i) a first surface (13a) through which light enters the first prism and (ii) a second surface (13b) that reflects the light, having entered the first prism, toward the light emission side, the optical film further including, between the plurality of first prisms in an in-plane direction of the optical film, a second prism (14) that reflects light.
    Type: Application
    Filed: February 15, 2013
    Publication date: February 5, 2015
    Inventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Kazuo Sekiya, Masahiro Nishizawa, Takahiro Ishinabe, Katsunori Ehara, Yoshihiro Hashimoto, Yasuhisa Itoh, Yoshitaka Yamamoto, Yutaka Ishii
  • Publication number: 20150015456
    Abstract: A multi-display device (101) of the present invention includes fry-eye lens arrays (3), located between a plurality of liquid crystal modules (11) arranged in parallel and in a tiling manner and a diffusing element (12), which cause rays of light emitted from light source sections (2) and transmitted through the liquid crystal modules (11) to be condensed on the diffusing element (12) at a pitch that is wider than a pixel pitch of the liquid crystal modules (11). This makes it possible with a simple configuration to make seams between image modulation elements less conspicuous and give a satisfactory feeling of resolution.
    Type: Application
    Filed: February 14, 2013
    Publication date: January 15, 2015
    Applicant: TOUOKU UNIVERISTY
    Inventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Kazuo Sekiya, Masahiro Nishizawa, Takahiro Ishinabe, Katsunori Ehara, Yoshihiro Hashimoto, Yasuhisa Itoh, Yoshitaka Yamamoto, Yutaka Ishii
  • Patent number: 7518676
    Abstract: A method of making a micro corner cube array includes the steps of: preparing a substrate, at least a surface portion of which consists of cubic single crystals and which has a surface that is substantially parallel to {111} planes of the crystals; and etching the surface of the substrate anisotropically, thereby forming a plurality of unit elements for the micro corner cube array on the surface of the substrate. Each of these unit elements is made up of a number of crystal planes that have been formed at a lower etch rate than the {111} planes of the crystals.
    Type: Grant
    Filed: March 8, 2006
    Date of Patent: April 14, 2009
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kiyoshi Minoura, Shun Ueki, Yasuhisa Itoh, Ichiroh Ihara, Yutaka Sawayama, Kohji Taniguchi
  • Patent number: 7499009
    Abstract: An erasing device for a liquid crystal display image of the present invention is furnished with an auxiliary power source for continuously supplying power source to a liquid crystal display panel for a certain period after the main power source of the main body of the liquid crystal display device is turned OFF. Upon input of a power source OFF signal directing to turn OFF the main power source, a driving signal generating circuit and a driver controller light up the liquid crystal display panel entirely on a saturation voltage of the liquid crystal and subsequently shut off the same entirely using the power supply from the auxiliary power source.
    Type: Grant
    Filed: June 9, 2005
    Date of Patent: March 3, 2009
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Makoto Kanbe, Yasuhisa Itoh, Shigeto Yoshida, Hiroshi Yoneda
  • Patent number: 7098976
    Abstract: A method of making a micro corner cube array includes the steps of: preparing a substrate, at least a surface portion of which consists of cubic single crystals and which has a surface that is substantially parallel to {111} planes of the crystals; and etching the surface of the substrate anisotropically, thereby forming a plurality of unit elements for the micro corner cube array on the surface of the substrate. Each of these unit elements is made up of a number of crystal planes that have been formed at a lower etch rate than the {111} planes of the crystals.
    Type: Grant
    Filed: June 17, 2002
    Date of Patent: August 29, 2006
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kiyoshi Minoura, Shun Ueki, Yasuhisa Itoh, Ichiroh Ihara, Yutaka Sawayama, Kohji Taniguchi
  • Publication number: 20060146237
    Abstract: A method of making a micro corner cube array includes the steps of: preparing a substrate, at least a surface portion of which consists of cubic single crystals and which has a surface that is substantially parallel to {111} planes of the crystals; and etching the surface of the substrate anisotropically, thereby forming a plurality of unit elements for the micro corner cube array on the surface of the substrate. Each of these unit elements is made up of a number of crystal planes that have been formed at a lower etch rate than the {111} planes of the crystals.
    Type: Application
    Filed: March 8, 2006
    Publication date: July 6, 2006
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Kiyoshi Minoura, Shun Ueki, Yasuhisa Itoh, Ichiroh Ihara, Yutaka Sawayama, Kohji Taniguchi
  • Publication number: 20060007217
    Abstract: An erasing device for a liquid crystal display image of the present invention is furnished with an auxiliary power source for continuously supplying power source to a liquid crystal display panel for a certain period after the main power source of the main body of the liquid crystal display device is turned OFF. Upon input of a power source OFF signal directing to turn OFF the main power source, a driving signal generating circuit and a driver controller light up the liquid crystal display panel entirely on a saturation voltage of the liquid crystal and subsequently shut off the same entirely using the power supply from the auxiliary power source.
    Type: Application
    Filed: June 9, 2005
    Publication date: January 12, 2006
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Makoto Kanbe, Yasuhisa Itoh, Shigeto Yoshida, Hiroshi Yoneda
  • Patent number: 6940479
    Abstract: An erasing device for a liquid crystal display image of the present invention is furnished with an auxiliary power source for continuously supplying power source to a liquid crystal display panel for a certain period after the main power source of the main body of the liquid crystal display device is turned OFF. Upon input of a power source OFF signal directing to turn OFF the main power source, a driving signal generating circuit and a driver controller light up the liquid crystal display panel entirely on a saturation voltage of the liquid crystal and subsequently shut off the same entirely using the power supply from the auxiliary power source.
    Type: Grant
    Filed: March 6, 2002
    Date of Patent: September 6, 2005
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Makoto Kanbe, Yasuhisa Itoh, Shigeto Yoshida, Hiroshi Yoneda
  • Patent number: 6717640
    Abstract: The reflection-type liquid crystal display device includes two liquid crystal layers for selectively reflecting light in a specific wavelength range, and a partition wall interposed between the liquid crystal layers so as to separate the liquid crystal layers from each other. The partition wall serves as a scattering layer having a light scattering function.
    Type: Grant
    Filed: August 22, 2002
    Date of Patent: April 6, 2004
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Eiji Sato, Yasuhisa Itoh, Kiyoshi Minoura, Tomoko Teranishi
  • Patent number: 6704079
    Abstract: A display device includes a reflector in which a plurality of elements, each including a number of reflective regions, is arranged. In the reflector, the reflective regions of each said element are disposed so that at least part of incoming light, which has been incident on the element, is reflected by each one of the reflective regions after another and then allowed to go out of the element. At least one of the reflective regions of each said element includes: a light reflective plane; and a light modulating layer that is formed on one side of the light reflective plane so as to face the incoming light.
    Type: Grant
    Filed: January 31, 2002
    Date of Patent: March 9, 2004
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kiyoshi Minoura, Shun Ueki, Masahiko Tomikawa, Eiji Satoh, Tomoko Teranishi, Yasuhisa Itoh
  • Patent number: 6600535
    Abstract: A reflector includes a substrate, a plurality of convex/concave portions formed on the substrate, and a thin reflective film formed over the convex/concave portions. When light is incident upon the reflector from a certain direction, an intensity of reflected light in a viewing angle range of about −45° to +45° with respect to a regular reflection direction of the incident light 10 is about 60% or more of an intensity of light which is incident upon a standard white plate from a direction inclined by about 30° from a direction normal to the plate and is reflected to the direction normal to the plate.
    Type: Grant
    Filed: February 25, 1999
    Date of Patent: July 29, 2003
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kazuhiko Tsuda, Masako Nakamura, Akiyoshi Fujii, Mariko Ban, Yasuhisa Itoh, Kozo Nakamura, Naofumi Kimura
  • Publication number: 20030059762
    Abstract: In the present system, textbook data stored in a server is represented and distributed to a teacher's terminal. Because of this, it is not necessary for a textbook issuer to print a sample textbook. Further, especially in the system, the server creates an original data by a combination of a plurality of textbook data in response to an instruction which is supplied from the teacher's terminal and distributes the original data thus created to the teacher's terminal. For the users of the teacher's terminal, this makes it possible to create and obtain their own (original) textbook data. Therefore, the users of the teacher's terminal can create a suitable textbook depending on use conditions (for example, the number or academic ability of students who the users teach or students' academic abilities).
    Type: Application
    Filed: August 14, 2002
    Publication date: March 27, 2003
    Inventors: Sayuri Fujiwara, Yasuhisa Itoh