Patents by Inventor Tatsuya Iwasaki

Tatsuya Iwasaki 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: 11860480
    Abstract: The present invention provides a liquid crystal display device having excellent display quality and suppressed occurrence of halo. The liquid crystal display device of the present invention is a liquid crystal display device including, in the following order, a first polarizer, a liquid crystal cell, a second polarizer, and a direct type backlight that uses a point light source, in which a light control member is further provided between the second polarizer and the direct type backlight, and the liquid crystal display device satisfies relationships of the following Expression (1) 70%?(I20/I0)×100?90%, Expression (2) 10%?(I40/I0)×100?35%, and Expression (3) 1%?(I60/I0)×100?20%.
    Type: Grant
    Filed: March 8, 2023
    Date of Patent: January 2, 2024
    Assignee: FUJIFILM Corporation
    Inventors: Masaaki Suzuki, Tatsuya Iwasaki, Katsufumi Ohmuro
  • Publication number: 20230221600
    Abstract: The present invention provides a liquid crystal display device having excellent display quality and suppressed occurrence of halo. The liquid crystal display device of the present invention is a liquid crystal display device including, in the following order, a first polarizer, a liquid crystal cell, a second polarizer, and a direct type backlight that uses a point light source, in which a light control member is further provided between the second polarizer and the direct type backlight, and the liquid crystal display device satisfies relationships of the following Expression (1) 70%?(I20/I0)×100?90%, Expression (2) 10%?(I40/I0)×100?35%, and Expression (3) 1%?(I60/I0)×100?20%.
    Type: Application
    Filed: March 8, 2023
    Publication date: July 13, 2023
    Applicant: FUJIFILM Corporation
    Inventors: Masaaki SUZUKI, Tatsuya IWASAKI, Katsufumi OHMURO
  • Publication number: 20230183574
    Abstract: Provided is a liquid crystal composition capable of suppressing a decrease in phase transition temperature from a smectic phase to a nematic phase and suppressing alignment defects in a liquid crystal cured layer thus formed, a liquid crystal cured layer, an optical film, a polarizing plate, and an image display device. The liquid crystal composition includes a liquid crystal compound exhibiting a smectic phase and a freezing point depressant, in which the liquid crystal compound is a compound represented by Formula (I) SP1-MG-SP2, and the liquid crystal composition satisfies Expression (1) |Am?Asl?0.2 and Expression (2-1) in a case of Am?As, Aa?(Am+As)/2 or Expression (2-2) in a case of Am>As, Aa?(Am+As)/2.
    Type: Application
    Filed: February 9, 2023
    Publication date: June 15, 2023
    Applicant: FUJIFILM Corporation
    Inventors: Toshikazu SUMI, Tatsuya IWASAKI, Yuki NAKAMURA
  • Publication number: 20230042986
    Abstract: Provided is a polymerizable liquid crystal composition capable of suppressing the generation of precipitates; and an optically anisotropic layer, an optical film, a polarizing plate, and an image display device. The polymerizable liquid crystal composition contains a forward wavelength dispersion liquid crystal compound A having an aromatic ring having 10 or more ? electrons and a forward wavelength dispersion liquid crystal compound B having an aromatic ring having 6 or more and less than 10 ? electrons.
    Type: Application
    Filed: September 21, 2022
    Publication date: February 9, 2023
    Applicant: FUJIFILM Corporation
    Inventors: Toshikazu SUMI, Tatsuya IWASAKI, Shunya KATOH, Hiroshi INADA, Megumi OKUBO
  • Publication number: 20220267675
    Abstract: An optical film, a polarizing plate, and an image display device, each having an optically anisotropic layer obtained by curing a polymerizable liquid crystal composition including a polymerizable liquid crystal compound (LCC) having forward wavelength dispersion and a monofunctional compound, and immobilizing an alignment state of the polymerizable LCC. The number a1 of atoms of the polymerizable LCC and the number a2 of atoms of the monofunctional compound satisfy a relationship of Expression (1): 0.2<a2/a1<0.55; the number b1 of the rings B1 contained in the polymerizable LCC and the total number b2 of the aromatic rings Ar and the rings B2 contained in the monofunctional compound satisfy a relationship of Expression (2): b2=b1×0.5 or b2=(b1+1)×0.5.
    Type: Application
    Filed: March 23, 2022
    Publication date: August 25, 2022
    Applicant: FUJIFILM Corporation
    Inventors: Toshikazu SUMI, Tatsuya IWASAKI, Shunya KATOH, Hiroshi INADA, Aiko YAMAMOTO
  • Patent number: 11421727
    Abstract: A carburized shaft part having a predetermined composition, a C content at a surface layer part of a mass % of 0.60 to 1.00%, at least one hole at an outer circumferential surface, a total volume ratio of martensite and retained austenite of 97% or more at a structure at a position of a 1 mm depth from the outer circumferential surface in an axial direction of the hole and a position of a 20 ?m depth from the surface of the hole, a maximum retained austenite volume ratio (R1) of 10.0 to 30.0% at a position of a 1 mm depth from the outer circumferential surface in the axial direction of the hole and a range up to a 200 ?m depth from the surface of the hole, and a retained austenite reduction ratio of 20% or more found from R1 and the retained austenite volume ratio (R2) at a position of a 1 mm depth from the outer circumferential surface in the axial direction of the hole and a position of a 20 ?m depth from the surface of the hole by the formula (A): ??=(R1?R)/R1×100.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: August 23, 2022
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Tatsuya Iwasaki, Koji Watari, Hidekazu Sueno
  • Publication number: 20220214484
    Abstract: An optical film, a polarizing plate, and an image display device, each having an optically anisotropic layer obtained by curing a polymerizable liquid crystal composition including immobilizing an alignment state of a rod-shaped liquid crystal compound (LCC) having reverse wavelength dispersibility and a monofunctional compound, in which the rod-shaped LCC has polymerizable groups P1 and P2, and three or more rings B1 selected from the group consisting of an aromatic ring and an alicyclic ring a1 atoms of the rod-shaped LCC and a2 atoms of the monofunctional compound having polymerizable group P3, satisfy a relationship of Expression (1): 0.2<a2/a1<0.55; b1 of the rings B1 contained in the rod-shaped LCC and a total b2 of the rings B2 and the aromatic rings Ar contained in the monofunctional compound satisfy a relationship of Expression (2): b2=b1×0.5 or b2=(b1+1)×0.5.
    Type: Application
    Filed: March 22, 2022
    Publication date: July 7, 2022
    Applicant: FUJIFILM Corporation
    Inventors: Tatsuya IWASAKI, Toshikazu SUMI, Shunya KATOH, Hiroshi INADA, Yuki FUKUSHIMA
  • Patent number: 11345982
    Abstract: A shaft part excellent in static torsional strength and torsional fatigue strength containing, by mass %, essential elements of C: 0.35 to 0.70%, Si: 0.01 to 0.40%, Mn: 0.5 to 2.6%, P: 0.050% or less, S: 0.005 to 0.020%, Al: 0.010 to 0.050%, N: 0.005 to 0.025%, and O: 0.003% or less, further containing optional elements, having a balance of Fe and impurities, having a chemical composition satisfying formula (1), having at least one hole at an outer circumferential surface, having a volume ratio (R1) of 4 to 20% of retained austenite at a position of a 2 mm depth from the outer circumferential surface, having a volume ratio of retained austenite at a position of a 2 mm depth from the outer circumferential surface in an axial direction of the hole and at a position of a 20 ?m depth from the surface of the hole as R2, and having a reduction rate ?? of 40% or more of retained austenite found by the formula (A): ??=[(R1?R2)/R1]×100: Formula (1): 15.0?25.9C+6.35Mn+2.88Cr+3.09Mo+2.73Ni?27.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: May 31, 2022
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Tatsuya Iwasaki, Koji Watari, Hidekazu Sueno
  • Patent number: 11332054
    Abstract: A vehicle seat (10) has a seat cushion (20) and a seat back (30), which are affixed to the body of a vehicle. The seat back (30) has: a first member (50) which is formed in a plate-like shape; and a second member (60) with a hat-shaped cross-section, which is configured so that a flange section (61) is in contact with one surface, in a thickness direction, of the first member (50). A center bead (52) is provided at the center portion of the first member (50). The center bead (52) is configured so that a longitudinal end of the center bead (52) and the second member (60) are overlapped in a plan view viewed in the thickness direction of the first member (50). As a result, the first member (50) of the seat back (30) is prevented from being deformed at the longitudinal end of the center bead (52).
    Type: Grant
    Filed: March 6, 2019
    Date of Patent: May 17, 2022
    Assignee: TACHI-S CO., LTD.
    Inventors: Masakazu Takeda, Mitsuru Tsukada, Keita Myochin, Tatsuya Iwasaki
  • Patent number: 11243436
    Abstract: A liquid crystal display device in which light leak and a tint change when being seen from an oblique direction at the time of black display are suppressed. The liquid crystal display device includes: a liquid crystal cell and a pair of polarizing plates that are disposed such that the liquid crystal cell is interposed between the pair of polarizing plates, in which a tilt angle of the liquid crystal compound is 1.0° or less, respective color filters that are disposed on respective pixel regions of the liquid crystal cell are provided between the pair of polarizing plates, Rth of the respective color filters satisfy predetermined requirements, the polarizing plate that is disposed on the visible side among the pair of polarizing plates includes an optical compensation layer and a polarizer in this order from the liquid crystal cell side, and the optical compensation layer satisfies a predetermined requirement.
    Type: Grant
    Filed: October 30, 2019
    Date of Patent: February 8, 2022
    Assignee: FUJIFILM Corporation
    Inventors: Tatsuya Iwasaki, Yuki Nakamura, Masaaki Suzuki, Katsufumi Ohmuro
  • Patent number: 11137638
    Abstract: The present invention provides a liquid crystal display device which suppresses a color change of light leak depending on a direction in the visual recognition from an oblique direction during black display, and has high display quality. The liquid crystal display device includes, in order, at least: a first polarizer; an optically anisotropic layer a liquid crystal cell; and a second polarizer, the liquid crystal cell has pixels with a screen resolution of 250 ppi or more, the pixels each have at least blue, green, and red subpixels, the subpixel has a chevron structure in which an angle formed between at least one side and an absorption axis of the first polarizer or an absorption axis of the second polarizer is larger than 0° and not larger than 5°, and a depolarization degree of the liquid crystal cell in a visible light region satisfies a predetermined requirement.
    Type: Grant
    Filed: March 2, 2021
    Date of Patent: October 5, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Naoyoshi Yamada, Tatsuya Iwasaki, Katsufumi Ohmuro
  • Patent number: 11131886
    Abstract: Provided is a horizontal electric field mode liquid crystal display device in which light leak and tint change at the time of black display are reduced in case of being seen from an oblique direction. The liquid crystal display device is an IPS mode liquid crystal display device including at least a first polarizer, a first optical compensation layer, a liquid crystal cell, and a second polarizer in this order, in which the first optical compensation layer satisfies a predetermined relational expression, a total thickness-direction retardation Rth total(550) present between the liquid crystal layer and the second polarizer in the liquid crystal cell satisfies a predetermined relational expression, and a slow axis of the first optical compensation layer is parallel to an absorption axis of a polarizer layer.
    Type: Grant
    Filed: December 10, 2020
    Date of Patent: September 28, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Tatsuya Iwasaki, Katsufumi Ohmuro
  • Publication number: 20210285078
    Abstract: A shaft part excellent in static torsional strength and torsional fatigue strength containing, by mass %, essential elements of C: 0.35 to 0.70%, Si: 0.01 to 0.40%, Mn: 0.5 to 2.6%, P: 0.050% or less, S: 0.005 to 0.020%, Al: 0.010 to 0.050%, N: 0.005 to 0.025%, and O: 0.003% or less, further containing optional elements, having a balance of Fe and impurities, having a chemical composition satisfying formula (1), having at least one hole at an outer circumferential surface, having a volume ratio (R1) of 4 to 20% of retained austenite at a position of a 2 mm depth from the outer circumferential surface, having a volume ratio of retained austenite at a position of a 2 mm depth from the outer circumferential surface in an axial direction of the hole and at a position of a 20 ?m depth from the surface of the hole as R2, and having a reduction rate ?? of 40% or more of retained austenite found by the formula (A): ??=[(R1?R2)/R1]×100: Formula (1): 15.0?25.9C+6.35Mn+2.88Cr+3.09Mo+2.73Ni?27.
    Type: Application
    Filed: September 20, 2017
    Publication date: September 16, 2021
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Tatsuya IWASAKI, Koji WATARI, Hidekazu SUENO
  • Publication number: 20210191195
    Abstract: The present invention provides a liquid crystal display device which suppresses a color change of light leak depending on a direction in the visual recognition from an oblique direction during black display, and has high display quality. The liquid crystal display device includes, in order, at least: a first polarizer; an optically anisotropic layer a liquid crystal cell; and a second polarizer, the liquid crystal cell has pixels with a screen resolution of 250 ppi or more, the pixels each have at least blue, green, and red subpixels, the subpixel has a chevron structure in which an angle formed between at least one side and an absorption axis of the first polarizer or an absorption axis of the second polarizer is larger than 0° and not larger than 5°, and a depolarization degree of the liquid crystal cell in a visible light region satisfies a predetermined requirement.
    Type: Application
    Filed: March 2, 2021
    Publication date: June 24, 2021
    Applicant: FUJIFILM Corporation
    Inventors: Naoyoshi YAMADA, Tatsuya IWASAKI, Katsufumi OHMURO
  • Patent number: 10974482
    Abstract: A laminated film having a haze of 1.0% or less and including two kinds of silica particles (silica particles A and silica particles B) in a cured layer, wherein the occupied area proportion of the silica particles A on a cross-sectional TEM image of the cured layer is 0.5% to 20.0% and satisfies the following relationship with the occupied area proportion of the silica particles B: 0.005?occupied area proportion of silica particles A/occupied area proportion of silica particles B?0.400, the variation coefficient of the occupied area proportion of the silica particles A on the cross-sectional TEM image of the cured layer is more than 0.5% and 3.0% or less, and the variation coefficient of the occupied area proportion of the silica particles B is 0.0% to 0.5%; a production method thereof; a polarizing plate; a liquid crystal panel; a liquid crystal display; and a touch panel.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: April 13, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Masaaki Suzuki, Tatsuya Iwasaki, Katsuyuki Takada
  • Publication number: 20210096412
    Abstract: Provided is a horizontal electric field mode liquid crystal display device in which light leak and tint change at the time of black display are reduced in case of being seen from an oblique direction. The liquid crystal display device is an IPS mode liquid crystal display device including at least a first polarizer, a first optical compensation layer, a liquid crystal cell, and a second polarizer in this order, in which the first optical compensation layer satisfies a predetermined relational expression, a total thickness-direction retardation Rth total(550) present between the liquid crystal layer and the second polarizer in the liquid crystal cell satisfies a predetermined relational expression, and a slow axis of the first optical compensation layer is parallel to an absorption axis of a polarizer layer.
    Type: Application
    Filed: December 10, 2020
    Publication date: April 1, 2021
    Applicant: FUJIFILM Corporation
    Inventors: Tatsuya IWASAKI, Katsufumi OHMURO
  • Patent number: 10935710
    Abstract: The present invention relates to an optical film which ensures adhesiveness between a polymer film and a liquid crystal layer without deteriorating the alignment of a liquid crystal compound; a polarizing plate using the same; an image display device; a method for producing an optical film; and a method for producing a polarizing plate. The optical film includes a polymer film including a cycloolefin-based polymer, and a liquid crystal layer that is provided adjacent to the polymer film, in which the liquid crystal layer is formed by using a liquid crystal composition containing a liquid crystal compound and a compound having a specific structure, where the liquid crystal composition contains the compound having a specific structure at a content of 0.5% to 7.0% by mass with respect to a mass of the liquid crystal compound, and a predetermined eccentricity value is 20% to 80%.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: March 2, 2021
    Assignee: FUJIFILM Corporation
    Inventors: Koji Iijima, Tatsuya Iwasaki, Katsufumi Ohmuro, Masaaki Suzuki
  • Patent number: 10897163
    Abstract: A power transmitter transmits an electric power signal S2 to a wireless power receiver. A transmission antenna includes a transmission coil and a resonance capacitor coupled in series. A driver applies a driving signal S1 to the transmission coil. A TX controller controls the driver. A wireless device detector of the TX controller detects a neighboring wireless device before electric power transmission is started.
    Type: Grant
    Filed: August 23, 2018
    Date of Patent: January 19, 2021
    Assignee: ROHM CO., LTD.
    Inventor: Tatsuya Iwasaki
  • Publication number: 20210001759
    Abstract: A vehicle seat (10) has a seat cushion (20) and a seat back (30), which are affixed to the body of a vehicle. The seat back (30) has: a first member (50) which is formed in a plate-like shape; and a second member (60) with a hat-shaped cross-section, which is configured so that a flange section (61) is in contact with one surface, in a thickness direction, of the first member (50). A center bead (52) is provided at the center portion of the first member (50). The center bead (52) is configured so that a longitudinal end of the center bead (52) and the second member (60) are overlapped in a plan view viewed in the thickness direction of the first member (50). As a result, the first member (50) of the seat back (30) is prevented from being deformed at the longitudinal end of the center bead (52).
    Type: Application
    Filed: March 6, 2019
    Publication date: January 7, 2021
    Applicant: TACHI-S CO., LTD.
    Inventors: Masakazu TAKEDA, Mitsuru TSUKADA, Keita MYOCHIN, Tatsuya IWASAKI
  • Patent number: 10858996
    Abstract: A gas turbine startup method and device wherein low-pressure, medium-pressure, and high-pressure air bleed flow paths supply compressed air bled from low-pressure, medium-pressure, and high-pressure air bleed chambers, respectively, of a compressor as cooling air to a turbine. Low-pressure, medium-pressure, and high-pressure exhaust flow paths discharge the compressed air in the low-pressure, medium-pressure, and high-pressure air bleed flow paths, respectively to the turbine exhaust system, and the low-pressure, the medium-pressure, and the high-pressure exhaust flow paths are provided respectively with a low-pressure exhaust valve, a medium-pressure exhaust valve, and a high-pressure exhaust valve. When the gas turbine starts up, the high-pressure exhaust valve is opened before the startup state of the gas turbine reaches a region in which rotation stall occurs.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: December 8, 2020
    Assignee: MITSUBISHI POWER, LTD.
    Inventors: Hidetaka Okui, Kentaro Suzuki, Toshishige Ai, Tatsuya Iwasaki, Yoshifumi Okajima