Patents by Inventor Tadashi Hasegawa

Tadashi Hasegawa 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: 20240094577
    Abstract: Provided is a liquid crystal display device capable of switching between a transparent state and a scattering state, reducing or preventing a decrease in transmittance in the transparent state, and reducing or preventing a decrease in luminance in the panel central portion in the scattering state. The liquid crystal display device includes, sequentially from its viewing surface side toward its back surface side: a first liquid crystal panel; a light source; and a second liquid crystal panel, the first liquid crystal panel including a polymer dispersed liquid crystal containing a polymer network and liquid crystal components, the light source being configured to irradiate a back surface side main surface of the first liquid crystal panel with light from an oblique direction.
    Type: Application
    Filed: October 25, 2023
    Publication date: March 21, 2024
    Inventors: Koji MURATA, Yasuhiro HASEBA, Kazutaka HANAOKA, Kimiaki NAKAMURA, Mariko HONDA, Atsuko KANASHIMA, Tadashi HASEGAWA, Shinji SHIMADA
  • Patent number: 11852911
    Abstract: Provided is a liquid crystal display device capable of switching between a transparent state and a scattering state, reducing or preventing a decrease in transmittance in the transparent state, and reducing or preventing a decrease in luminance in the panel central portion in the scattering state. The liquid crystal display device includes, sequentially from its viewing surface side toward its back surface side: a first liquid crystal panel; a light source; and a second liquid crystal panel, the first liquid crystal panel including a polymer dispersed liquid crystal containing a polymer network and liquid crystal components, the light source being configured to irradiate a back surface side main surface of the first liquid crystal panel with light from an oblique direction.
    Type: Grant
    Filed: June 29, 2022
    Date of Patent: December 26, 2023
    Assignee: SHARP DISPLAY TECHNOLOGY CORPORATION
    Inventors: Koji Murata, Yasuhiro Haseba, Kazutaka Hanaoka, Kimiaki Nakamura, Mariko Honda, Atsuko Kanashima, Tadashi Hasegawa, Shinji Shimada
  • Patent number: 11829021
    Abstract: Provided is a polymer dispersed liquid crystal display device including: a pair of substrates including an electrode on at least one substrate; and a composite layer disposed between the pair of substrates. The composite layer includes a liquid crystal component and a polymer network constituted by a cured product of a photopolymerizable liquid crystal compound, and is in a transparent state when no voltage is applied and in a scattering state when a voltage is applied, and the polymer network has a helical structure with a number of turns of from one to less than eight in the composite layer.
    Type: Grant
    Filed: January 19, 2022
    Date of Patent: November 28, 2023
    Assignee: Sharp Display Technology Corporation
    Inventors: Koji Murata, Kimiaki Nakamura, Mariko Honda, Tadashi Hasegawa, Kazutaka Hanaoka, Yasuhiro Haseba, Shinji Shimada, Atsuko Kanashima
  • Publication number: 20230024383
    Abstract: Provided is a liquid crystal display device capable of switching between a transparent state and a scattering state, reducing or preventing a decrease in transmittance in the transparent state, and reducing or preventing a decrease in luminance in the panel central portion in the scattering state. The liquid crystal display device includes, sequentially from its viewing surface side toward its back surface side: a first liquid crystal panel; a light source; and a second liquid crystal panel, the first liquid crystal panel including a polymer dispersed liquid crystal containing a polymer network and liquid crystal components, the light source being configured to irradiate a back surface side main surface of the first liquid crystal panel with light from an oblique direction.
    Type: Application
    Filed: June 29, 2022
    Publication date: January 26, 2023
    Inventors: Koji MURATA, Yasuhiro HASEBA, Kazutaka HANAOKA, Kimiaki NAKAMURA, Mariko HONDA, Atsuko KANASHIMA, Tadashi HASEGAWA, Shinji SHIMADA
  • Publication number: 20220236598
    Abstract: Provided is a polymer dispersed liquid crystal display device including: a pair of substrates including an electrode on at least one substrate; and a composite layer disposed between the pair of substrates. The composite layer includes a liquid crystal component and a polymer network constituted by a cured product of a photopolymerizable liquid crystal compound, and is in a transparent state when no voltage is applied and in a scattering state when a voltage is applied, and the polymer network has a helical structure with a number of turns of from one to less than eight in the composite layer.
    Type: Application
    Filed: January 19, 2022
    Publication date: July 28, 2022
    Inventors: Koji MURATA, Kimiaki NAKAMURA, Mariko HONDA, Tadashi HASEGAWA, Kazutaka HANAOKA, Yasuhiro HASEBA, Shinji SHIMADA, Atsuko KANASHIMA
  • Patent number: 11245219
    Abstract: A joint connector, including: a connector housing; a joint terminal; a terminal holder; and a lock arm that is formed in an outer peripheral wall of the connector housing, in which a rear end portion of the terminal holder is provided with convex portions that protrude rearward from a rearmost end edge of the connector housing in a proper assembled state of the terminal holder with respect to the connector housing.
    Type: Grant
    Filed: June 3, 2020
    Date of Patent: February 8, 2022
    Assignee: YAZAKI CORPORATION
    Inventors: Tomohiko Shimizu, Tadashi Hasegawa
  • Patent number: 11152737
    Abstract: A connector which is held on an outer peripheral surface of a wire harness having a connector housing which includes an outer peripheral wall on which a tape is to be peripherally wound, and an outermost surface of the outer peripheral wall of the connector housing is provided with: a plurality of planar outer surfaces, ridge line portions, the ridge line portion is provided with a corner-removed chamfered portion and a non-chamfered portion, and the non-chamfered portion is engaged with a side edge of a tape wound around the outer surfaces so as to be used as a position displacement regulation projection configured to regulate an axial position displacement of the connector housing with respect to the tape.
    Type: Grant
    Filed: May 21, 2020
    Date of Patent: October 19, 2021
    Assignee: YAZAKI CORPORATION
    Inventors: Tomohiko Shimizu, Tadashi Hasegawa
  • Patent number: 10931054
    Abstract: A connector structure includes a bottomed tubular hood formed in a housing, a mating hood formed in a mating housing and fitted inside the bottomed tubular hood, a plate spring member made of metal accommodated in a tube bottom of the bottomed tubular hood, a backlash regulating member provided on an opposite side of the tube bottom across the plate spring member and urged in a direction opposite to a fitting direction of the mating hood by the plate spring member, a mating hood tip end surface formed at a tip end of the mating hood in the fitting direction, and a regulating member abutting surface provided on the backlash regulating member and pressed by the mating hood tip end surface in a fitted state that the housing and the mating housing are fitted.
    Type: Grant
    Filed: January 6, 2020
    Date of Patent: February 23, 2021
    Assignee: Yazaki Corporation
    Inventors: Masayuki Saito, Tadashi Hasegawa
  • Publication number: 20200388948
    Abstract: A joint connector, including: a connector housing; a joint terminal; a terminal holder; and a lock arm that is formed in an outer peripheral wall of the connector housing, in which a rear end portion of the terminal holder is provided with convex portions that protrude rearward from a rearmost end edge of the connector housing in a proper assembled state of the terminal holder with respect to the connector housing.
    Type: Application
    Filed: June 3, 2020
    Publication date: December 10, 2020
    Applicant: Yazaki Corporation
    Inventors: Tomohiko SHIMIZU, Tadashi HASEGAWA
  • Publication number: 20200373704
    Abstract: A connector which is held on an outer peripheral surface of a wire harness having a connector housing which includes an outer peripheral wall on which a tape is to be peripherally wound, and an outermost surface of the outer peripheral wall of the connector housing is provided with: a plurality of planar outer surfaces, ridge line portions, the ridge line portion is provided with a corner-removed chamfered portion and a non-chamfered portion, and the non-chamfered portion is engaged with a side edge of a tape wound around the outer surfaces so as to be used as a position displacement regulation projection configured to regulate an axial position displacement of the connector housing with respect to the tape.
    Type: Application
    Filed: May 21, 2020
    Publication date: November 26, 2020
    Applicant: Yazaki Corporation
    Inventors: Tomohiko SHIMIZU, Tadashi Hasegawa
  • Publication number: 20200251847
    Abstract: A connector structure includes a bottomed tubular hood formed in a housing, a mating hood formed in a mating housing and fitted inside the hood, a plate spring member made of metal accommodated in a tube bottom of the hood, a backlash regulating member provided on an opposite side of the tube bottom across the plate spring member and urged in a direction opposite to a fitting direction of the mating hood by the plate spring member, a mating hood tip end surface formed at a tip end of the mating hood in the fitting direction, and a regulating member abutting surface provided on the backlash regulating member and pressed by the mating hood tip end surface in a fitted state that the housing and the mating housing are fitted.
    Type: Application
    Filed: January 6, 2020
    Publication date: August 6, 2020
    Applicant: Yazaki Corporation
    Inventors: Masayuki Saito, Tadashi Hasegawa
  • Patent number: 10291089
    Abstract: A hub of this motor includes a hub annular portion being annular and arranged above a stator, and a flange portion arranged to extend radially outward from the hub annular portion, and including an upper surface on which an annular member is arranged. A yoke includes a first yoke cylindrical portion to which a magnet is fixed; a yoke annular portion arranged to extend radially inward from an upper end of the first yoke cylindrical portion, and including an upper surface arranged opposite to a lower surface of the hub; and a second yoke cylindrical portion arranged to extend axially upward from a radially inner end portion of the yoke annular portion. An inner circumferential surface of the hub annular portion and an outer circumferential surface of the second yoke cylindrical portion are fixed to each other at an engagement portion arranged radially inward of a radially inner end portion of each of coils.
    Type: Grant
    Filed: October 21, 2016
    Date of Patent: May 14, 2019
    Assignee: NIDEC CORPORATION
    Inventors: Takuo Miyake, Tadashi Hasegawa, Yoichi Sekii, Keigo Kobayashi
  • Patent number: 10236745
    Abstract: A circuit board is in the shape of a strip and includes: in one longitudinal end portion thereof, power connection portions connected to an external power supply; in another longitudinal end portion thereof, land portions to which portions of conducting wires drawn out downwardly of a base portion are connected; and pattern portions electrically connected to the power connection portions and the land portions. The land portions include a first land portion, and a second land portion arranged adjacent to the first land portion. The pattern portions include a first pattern portion electrically connected to the first land portion, and a second pattern portion arranged adjacent to the first pattern portion, and electrically connected to the second land portion. The first pattern portion and the second land portion are arranged to overlap with each other when viewed in a widthwise direction of the circuit board.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: March 19, 2019
    Assignee: NIDEC CORPORATION
    Inventors: Michihiro Ito, Mitsuo Kodama, Tadashi Hasegawa
  • Patent number: 10082753
    Abstract: The invention provides a fixation member having a fluororesin tube serving as a release layer which attains both suitable electrical conductivity and high releasability. The fixation member (fixation tube) has a release layer on the surface thereof. The release layer is formed of a fluororesin tube containing carbon. The fluororesin tube has a percent dielectric relaxation of 1.0% to 5.0% or an optical transmission density of 1 to 4. The fluororesin tube preferably has a dielectric constant of 2.15 to 2.5.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: September 25, 2018
    Assignee: SYNZTEC CO., LTD.
    Inventors: Masayuki Goto, Wataru Nemoto, Tadashi Hasegawa, Masaya Suzuki
  • Publication number: 20180181038
    Abstract: An object of the invention is to provide a fixation member which has an unfixed toner fixation function and ensures high releasability, low chargeability, and high friction. The fixation member has an elastic layer, and a release layer on the external surface of the elastic layer, wherein the release layer is formed of a fluororesin tube having low chargeability and a percent dielectric relaxation of 15% or higher.
    Type: Application
    Filed: December 14, 2017
    Publication date: June 28, 2018
    Inventors: Wataru NEMOTO, Tadashi HASEGAWA
  • Publication number: 20170353076
    Abstract: A circuit board is in the shape of a strip and includes: in one longitudinal end portion thereof, power connection portions connected to an external power supply; in another longitudinal end portion thereof, land portions to which portions of conducting wires drawn out downwardly of a base portion are connected; and pattern portions electrically connected to the power connection portions and the land portions. The land portions include a first land portion, and a second land portion arranged adjacent to the first land portion. The pattern portions include a first pattern portion electrically connected to the first land portion, and a second pattern portion arranged adjacent to the first pattern portion, and electrically connected to the second land portion. The first pattern portion and the second land portion are arranged to overlap with each other when viewed in a widthwise direction of the circuit board.
    Type: Application
    Filed: November 21, 2016
    Publication date: December 7, 2017
    Inventors: Michihiro ITO, Mitsuo KODAMA, Tadashi HASEGAWA
  • Publication number: 20170353068
    Abstract: A hub of this motor includes a hub annular portion being annular and arranged above a stator, and a flange portion arranged to extend radially outward from the hub annular portion, and including an upper surface on which an annular member is arranged. A yoke includes a first yoke cylindrical portion to which a magnet is fixed; a yoke annular portion arranged to extend radially inward from an upper end of the first yoke cylindrical portion, and including an upper surface arranged opposite to a lower surface of the hub; and a second yoke cylindrical portion arranged to extend axially upward from a radially inner end portion of the yoke annular portion. An inner circumferential surface of the hub annular portion and an outer circumferential surface of the second yoke cylindrical portion are fixed to each other at an engagement portion arranged radially inward of a radially inner end portion of each of coils.
    Type: Application
    Filed: October 21, 2016
    Publication date: December 7, 2017
    Inventors: Takuo MIYAKE, Tadashi HASEGAWA, Yoichi SEKII, Keigo KOBAYASHI
  • Publication number: 20170139359
    Abstract: The invention provides a fixation member having a fluororesin tube serving as a release layer which attains both suitable electrical conductivity and high releasability. The fixation member (fixation tube) has a release layer on the surface thereof. The release layer is formed of a fluororesin tube containing carbon. The fluororesin tube has a percent dielectric relaxation of 1.0% to 5.0% or an optical transmission density of 1 to 4. The fluororesin tube preferably has a dielectric constant of 2.15 to 2.5.
    Type: Application
    Filed: November 17, 2016
    Publication date: May 18, 2017
    Inventors: Masayuki GOTO, Wataru NEMOTO, Tadashi HASEGAWA, Masaya SUZUKI
  • Patent number: 8992259
    Abstract: There is provided a connector capable of reducing deterioration of the noise removal capability by suppressing deformation of a ferrite. The connector includes: a housing which is provided with a plurality of connector fitting portions to be fitted in a plurality of mating connectors, respectively; a plurality of terminals which are attached to the housing to project within the plurality of connector fitting portions, respectively; a plurality of ferrites which remove noise generated from the plurality of terminals, each ferrite being provided for the respective one of the connector fitting portions and having a through hole through which each of the plurality of terminals passes; and a plurality of pressing arms which are provided in the housing, each pressing arm holding the respective one of the plurality of ferrites.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: March 31, 2015
    Assignees: Yazaki Corporation, Toyota Jidosha Kabushiki Kaisha
    Inventors: Takeya Miwa, Tadashi Hasegawa, Takahito Nakashima, Hiroshi Kobayashi, Saori Muramatsu
  • Publication number: 20130303023
    Abstract: There is provided a connector capable of reducing deterioration of the noise removal capability by suppressing deformation of a ferrite. The connector includes: a housing which is provided with a plurality of connector fitting portions to be fitted in a plurality of mating connectors, respectively; a plurality of terminals which are attached to the housing to project within the plurality of connector fitting portions, respectively; a plurality of ferrites which remove noise generated from the plurality of terminals, each ferrite being provided for the respective one of the connector fitting portions and having a through hole through which each of the plurality of terminals passes; and a plurality of pressing arms which are provided in the housing, each pressing arm holding the respective one of the plurality of ferrites.
    Type: Application
    Filed: September 21, 2011
    Publication date: November 14, 2013
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, YAZAKI CORPORATION
    Inventors: Takeya Miwa, Tadashi Hasegawa, Takahito Nakashima, Hiroshi Kobayashi, Saori Muramatsu