Patents by Inventor Tetsuroh Asakura

Tetsuroh Asakura 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).

  • Patent number: 11733566
    Abstract: A curved liquid crystal panel includes a first substrate curved in a first direction; a second substrate curved in a first direction and facing the first substrate; a liquid crystal sandwiched between the first substrate and the second substrate; a first seal that adheres the first substrate and the second substrate to each other and that seals the liquid crystal; and a second seal surrounding a periphery of the first seal. A force of the second seal that adheres the first substrate and the second substrate to each other is weaker than a force of the first seal that adheres the first substrate and the second substrate to each other.
    Type: Grant
    Filed: December 13, 2021
    Date of Patent: August 22, 2023
    Assignee: Shanghai Tianma Micro-Electronics Co., Ltd.
    Inventor: Tetsuroh Asakura
  • Patent number: 11506925
    Abstract: A liquid crystal display device includes a first liquid crystal display panel including a first light-transmitting substrate (thickness T2?0.3 mm), a substrate, a first liquid crystal, a first polarizing plate having a second main surface that is adhered to the first light-transmitting substrate; an adhering layer provided on a first main surface of the first polarizing plate; and a second light-transmitting substrate (thickness T3?0.3 mm) adhered to the first main surface by the adhering layer (thickness T1?0.15 mm). An adhesion parameter ? is 1.04 or less when a maximum height of an unevenness of the first main surface 0.0005 mm or less, and the adhesion parameter ? is 0.43 or less when the maximum height of the unevenness of the first main surface is greater than 0.0005 mm and 0.001 mm or less.
    Type: Grant
    Filed: December 18, 2020
    Date of Patent: November 22, 2022
    Assignees: TIANMA JAPAN, LTD., Wuhan Tianma Micro-Electronics Co., Ltd.
    Inventors: Jin Matsushima, Tetsuroh Asakura, Yukie Keicho
  • Publication number: 20220197068
    Abstract: A curved liquid crystal panel includes a first substrate curved in a first direction; a second substrate curved in a first direction and facing the first substrate; a liquid crystal sandwiched between the first substrate and the second substrate; a first seal that adheres the first substrate and the second substrate to each other and that seals the liquid crystal; and a second seal surrounding a periphery of the first seal. A force of the second seal that adheres the first substrate and the second substrate to each other is weaker than a force of the first seal that adheres the first substrate and the second substrate to each other.
    Type: Application
    Filed: December 13, 2021
    Publication date: June 23, 2022
    Applicant: Shanghai Tianma Micro-Electronics Co., Ltd.
    Inventor: Tetsuroh ASAKURA
  • Publication number: 20210200024
    Abstract: A liquid crystal display device includes a first liquid crystal display panel including a first light-transmitting substrate (thickness T2?0.3 mm), a substrate, a first liquid crystal, a first polarizing plate having a second main surface that is adhered to the first light-transmitting substrate; an adhering layer provided on a first main surface of the first polarizing plate; and a second light-transmitting substrate (thickness T3?0.3 mm) adhered to the first main surface by the adhering layer (thickness T1?0.15 mm). An adhesion parameter ? is 1.04 or less when a maximum height of an unevenness of the first main surface 0.0005 mm or less, and the adhesion parameter ? is 0.43 or less when the maximum height of the unevenness of the first main surface is greater than 0.0005 mm and 0.001 mm or less.
    Type: Application
    Filed: December 18, 2020
    Publication date: July 1, 2021
    Applicants: Tianma Japan, Ltd., Wuhan Tianma Micro-Electronics Co., Ltd.
    Inventors: Jin MATSUSHIMA, Tetsuroh ASAKURA, Yukie KEICHO
  • Patent number: 10942383
    Abstract: A display device includes: a liquid crystal panel having a first surface including a display region and a second surface opposite to the first surface, as curved surfaces curved in a first direction; a contact member attached to the second surface; a pressure member attached to the contact member, and applying a pressing force to the panel, the pressing force countering an elastic force acting to restore the panel as a flat plate; and a fixing chassis fixing the pressure member at a position opposing the contact member; the panel includes a seal tracing an inner circumference of the curved surface and sealing liquid crystal, and a contact region between the contact member and the panel is located inside the seal along a third axis being perpendicular to a first axis defining a non-curved side of the curved surface, and to a second axis defining the first direction.
    Type: Grant
    Filed: August 8, 2019
    Date of Patent: March 9, 2021
    Assignee: TIANMA JAPAN, LTD.
    Inventor: Tetsuroh Asakura
  • Patent number: 10852572
    Abstract: A display includes a first substrate, a second substrate, a liquid crystal layer between the first substrate and the second substrate, pixel driving electrodes for pixels, the pixel driving electrodes being provided on the first substrate and configured to provide control electric fields to the liquid crystal layer, louver elements, louver element driving electrodes provided on a face facing the first substrate of the second substrate, and an unseparated shield electrode between the louver element driving electrodes and the liquid crystal layer. Each of the louver elements are configured to stand on the second substrate, be sandwiched between one of the louver element driving electrodes and the shield electrode, and change amount of light to be transmitted in accordance with voltage applied across the louver element driving electrode and the shield electrode to change viewing angle.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: December 1, 2020
    Assignee: TIANMA JAPAN, LTD.
    Inventors: Hideki Nishimura, Tetsuroh Asakura, Futoshi Nakanishi
  • Patent number: 10795216
    Abstract: Provided is a method of manufacturing a display device including a louver that is capable of changing viewing angle. The method includes: a first step of forming a first electrode layer to drive the louver on a first main face of a first substrate; a second step of forming a resin layer on the first electrode layer; a third step of forming louver grooves to contain electrophoretic particles and dispersion medium in the resin layer; a fourth step of forming a sealing layer having a flat top face on the resin layer having the louver grooves in such a manner that the sealing layer closes the louver grooves; a fifth step of forming color filters on the sealing layer; and a sixth step of forming a second electrode layer to drive the louver on the sealing layer.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: October 6, 2020
    Assignee: TIANMA JAPAN, LTD.
    Inventors: Tetsuroh Asakura, Hideki Nishimura, Futoshi Nakanishi
  • Patent number: 10718953
    Abstract: A substrate laminating apparatus, including a first vacuum chamber including a first opening; a first table provided inside the first opening for holding a first substrate; a second vacuum chamber including a second opening; a second table provided inside the second opening for holding a second substrate, wherein the substrates are laminated by reducing a pressure in a closed space formed by having the first opening faced with the second opening. The apparatus also includes a vacuum evacuation unit connected to the first vacuum chamber or the second vacuum chamber and performs reduced-pressure evacuation of the closed space. When there is a direction along which priority is given on lamination precision when laminating the first and second substrates, and the direction is defined as a lamination precision priority direction, a reduced-pressure evacuation direction done by the vacuum evacuation unit is a direction different from the lamination precision priority direction.
    Type: Grant
    Filed: February 26, 2018
    Date of Patent: July 21, 2020
    Assignee: TIANMA MICROELECTRONICS CO., LTD.
    Inventors: Tetsuroh Asakura, Koji Shigemura
  • Publication number: 20200050056
    Abstract: A display device includes: a liquid crystal panel having a first surface including a display region and a second surface opposite to the first surface, as curved surfaces curved in a first direction; a contact member attached to the second surface; a pressure member attached to the contact member, and applying a pressing force to the panel, the pressing force countering an elastic force acting to restore the panel as a flat plate; and a fixing chassis fixing the pressure member at a position opposing the contact member; the panel includes a seal tracing an inner circumference of the curved surface and sealing liquid crystal, and a contact region between the contact member and the panel is located inside the seal along a third axis being perpendicular to a first axis defining a non-curved side of the curved surface, and to a second axis defining the first direction.
    Type: Application
    Filed: August 8, 2019
    Publication date: February 13, 2020
    Applicant: Tianma Japan, Ltd.
    Inventor: Tetsuroh Asakura
  • Publication number: 20190162997
    Abstract: Provided is a method of manufacturing a display device including a louver that is capable of changing viewing angle. The method includes: a first step of forming a first electrode layer to drive the louver on a first main face of a first substrate; a second step of forming a resin layer on the first electrode layer; a third step of forming louver grooves to contain electrophoretic particles and dispersion medium in the resin layer; a fourth step of forming a sealing layer having a flat top face on the resin layer having the louver grooves in such a manner that the sealing layer closes the louver grooves; a fifth step of forming color filters on the sealing layer; and a sixth step of forming a second electrode layer to drive the louver on the sealing layer.
    Type: Application
    Filed: November 21, 2018
    Publication date: May 30, 2019
    Applicant: TIANMA JAPAN, LTD.
    Inventors: Tetsuroh ASAKURA, Hideki Nishimura, Futoshi Nakanishi
  • Publication number: 20190162990
    Abstract: A display includes a first substrate, a second substrate, a liquid crystal layer between the first substrate and the second substrate, pixel driving electrodes for pixels, the pixel driving electrodes being provided on the first substrate and configured to provide control electric fields to the liquid crystal layer, louver elements, louver element driving electrodes provided on a face facing the first substrate of the second substrate, and an unseparated shield electrode between the louver element driving electrodes and the liquid crystal layer. Each of the louver elements are configured to stand on the second substrate, be sandwiched between one of the louver element driving electrodes and the shield electrode, and change amount of light to be transmitted in accordance with voltage applied across the louver element driving electrode and the shield electrode to change viewing angle.
    Type: Application
    Filed: November 21, 2018
    Publication date: May 30, 2019
    Applicant: Tianma Japan, Ltd.
    Inventors: Hideki NISHIMURA, Tetsuroh ASAKURA, Futoshi NAKANISHI
  • Publication number: 20180188547
    Abstract: A substrate laminating apparatus, including a first vacuum chamber including a first opening; a first table provided inside the first opening for holding a first substrate; a second vacuum chamber including a second opening; a second table provided inside the second opening for holding a second substrate, wherein the substrates are laminated by reducing a pressure in a closed space formed by having the first opening faced with the second opening. The apparatus also includes a vacuum evacuation unit connected to the first vacuum chamber or the second vacuum chamber and performs reduced-pressure evacuation of the closed space. When there is a direction along which priority is given on lamination precision when laminating the first and second substrates, and the direction is defined as a lamination precision priority direction, a reduced-pressure evacuation direction done by the vacuum evacuation unit is a direction different from the lamination precision priority direction.
    Type: Application
    Filed: February 26, 2018
    Publication date: July 5, 2018
    Applicant: Tianma Japan, Ltd.
    Inventors: Tetsuroh ASAKURA, Koji SHIGEMURA
  • Patent number: 9904062
    Abstract: To provide a substrate laminating apparatus and a substrate laminating method capable of laminating two substrates highly precisely while achieving low cost and saving space. The substrate laminating apparatus includes an upper-substrate camera group provided to a lower vacuum chamber for capturing an image of an upper substrate fixed to an upper vacuum chamber. The upper-substrate camera group captures images of a first upper-substrate alignment mark and a second upper-substrate alignment mark of the upper substrate fixed to the upper vacuum chamber by actions synchronized with the lower vacuum chamber. Thereby, it is possible to save the space and to lower the cost by reducing the number of mechanical components.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: February 27, 2018
    Assignee: NLT TECHNOLOGIES, LTD.
    Inventors: Tetsuroh Asakura, Koji Shigemura
  • Publication number: 20150253580
    Abstract: To provide a substrate laminating apparatus and a substrate laminating method capable of laminating two substrates highly precisely while achieving low cost and saving space. The substrate laminating apparatus includes an upper-substrate camera group provided to a lower vacuum chamber for capturing an image of an upper substrate fixed to an upper vacuum chamber. The upper-substrate camera group captures images of a first upper-substrate alignment mark and a second upper-substrate alignment mark of the upper substrate fixed to the upper vacuum chamber by actions synchronized with the lower vacuum chamber. Thereby, it is possible to save the space and to lower the cost by reducing the number of mechanical components.
    Type: Application
    Filed: March 6, 2015
    Publication date: September 10, 2015
    Applicant: NLT TECHNOLOGIES, LTD.
    Inventors: Tetsuroh ASAKURA, Koji SHIGEMURA
  • Patent number: 8724070
    Abstract: A connecting structure of the present invention includes a first substrate, a second substrate on which the first substrate is laminated, and a sheet like connection body having one end connected to one principal surface of the first substrate and another end connected to one principal surface of the second substrate, wherein a lengthwise direction of the sheet like connection body is parallel to a perimeter part of the first substrate, and the sheet like connection body has a slit part extending from one of end portions thereof to a part thereof along the lengthwise direction, and has a first end and a second end divided by the slit part at one of end portions, the first end is connected to a principal surface of the first substrate in vicinity of a peripheral part of the first substrate, and the second end is connected to a principal surface of the second substrate in vicinity of a peripheral part of the first substrate.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: May 13, 2014
    Assignee: NLT Technologies, Ltd.
    Inventors: Youichirou Kamon, Hiroshi Haga, Tetsuroh Asakura
  • Patent number: 8717525
    Abstract: A connecting structure of the present invention includes a first substrate, a second substrate on which the first substrate is laminated, and a sheet like connection body having one end connected to one principal surface of the first substrate and another end connected to one principal surface of the second substrate, wherein a lengthwise direction of the sheet like connection body is parallel to a perimeter part of the first substrate, and the sheet like connection body has a slit part extending from one of end portions thereof to a part thereof along the lengthwise direction, and has a first end and a second end divided by the slit part at one of end portions, the first end is connected to a principal surface of the first substrate in vicinity of a peripheral part of the first substrate, and the second end is connected to a principal surface of the second substrate in vicinity of a peripheral part of the first substrate.
    Type: Grant
    Filed: October 3, 2013
    Date of Patent: May 6, 2014
    Assignee: NLT Technologies, Ltd.
    Inventors: Youichirou Kamon, Hiroshi Haga, Tetsuroh Asakura
  • Publication number: 20140036181
    Abstract: A connecting structure of the present invention includes a first substrate, a second substrate on which the first substrate is laminated, and a sheet like connection body having one end connected to one principal surface of the first substrate and another end connected to one principal surface of the second substrate, wherein a lengthwise direction of the sheet like connection body is parallel to a perimeter part of the first substrate, and the sheet like connection body has a slit part extending from one of end portions thereof to a part thereof along the lengthwise direction, and has a first end and a second end divided by the slit part at one of end portions, the first end is connected to a principal surface of the first substrate in vicinity of a peripheral part of the first substrate, and the second end is connected to a principal surface of the second substrate in vicinity of a peripheral part of the first substrate.
    Type: Application
    Filed: October 3, 2013
    Publication date: February 6, 2014
    Applicant: NLT Technologies, Ltd.
    Inventors: Youichirou KAMON, Hiroshi HAGA, Tetsuroh ASAKURA
  • Patent number: 8405812
    Abstract: A connecting structure of the present invention includes a first substrate, a second substrate on which the first substrate is laminated, and a sheet like connection body having one end connected to one principal surface of the first substrate and another end connected to one principal surface of the second substrate, wherein a lengthwise direction of the sheet like connection body is parallel to a perimeter part of the first substrate, and the sheet like connection body has a slit part extending from one of end portions thereof to a part thereof along the lengthwise direction, and has a first end and a second end divided by the slit part at one of end portions, the first end is connected to a principal surface of the first substrate in vicinity of a peripheral part of the first substrate, and the second end is connected to a principal surface of the second substrate in vicinity of a peripheral part of the first substrate.
    Type: Grant
    Filed: August 24, 2010
    Date of Patent: March 26, 2013
    Assignee: NLT Technologies, Ltd.
    Inventors: Youichirou Kamon, Hiroshi Haga, Tetsuroh Asakura
  • Publication number: 20110051068
    Abstract: A connecting structure of the present invention includes a first substrate, a second substrate on which the first substrate is laminated, and a sheet like connection body having one end connected to one principal surface of the first substrate and another end connected to one principal surface of the second substrate, wherein a lengthwise direction of the sheet like connection body is parallel to a perimeter part of the first substrate, and the sheet like connection body has a slit part extending from one of end portions thereof to a part thereof along the lengthwise direction, and has a first end and a second end divided by the slit part at one of end portions, the first end is connected to a principal surface of the first substrate in vicinity of a peripheral part of the first substrate, and the second end is connected to a principal surface of the second substrate in vicinity of a peripheral part of the first substrate.
    Type: Application
    Filed: August 24, 2010
    Publication date: March 3, 2011
    Applicant: NEC LCD TECHNOLOGIES, LTD.
    Inventors: YOUICHIROU KAMON, HIROSHI HAGA, TETSUROH ASAKURA
  • Patent number: 6531329
    Abstract: Provided is a method of manufacturing a liquid crystal display panel of high quality without wasting liquid crystal material. In a step for pressing both of transparent glass substrates against each other, liquid crystal spreads and air bubbles are exhausted through notch portions. A sealing material is crushed before the liquid crystal reaches the notch portions, and the notch portions are blocked. Accordingly, a gap between the transparent glass substrates is sealed in a state where the liquid crystal is filled therein. Moreover, at the same time, both of the transparent glass substrates are compressively attached to each other with the sealing material interposed therebetween.
    Type: Grant
    Filed: June 18, 2001
    Date of Patent: March 11, 2003
    Assignee: NEC Corporation
    Inventors: Tetsuroh Asakura, Takeshi Sasaki