Patents by Inventor Akira Sakai

Akira Sakai 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: 20240119296
    Abstract: A learning device calculates an estimation target item reference value according to a fixed value of each estimation target object. The learning device acquires learning data that includes the fixed value of each estimation target object, a variable item value, and an estimation target item value according to the fixed value and the variable item value. The learning device trains, using the learning data and an evaluation function, a model that outputs an estimated value of the estimation target item value in response to input of the fixed value of each estimation target object and the variable item value.
    Type: Application
    Filed: June 7, 2021
    Publication date: April 11, 2024
    Applicant: NEC Corporation
    Inventors: Akira TANIMOTO, Tomoya SAKAI, Takashi TAKENOUCHI, Hisashi KASHIMA
  • Publication number: 20240111195
    Abstract: Provided is a liquid crystal display device including a liquid crystal panel including in the following order an active matrix substrate, a liquid crystal layer, and a counter substrate. The active matrix substrate includes in the following order a first electrode and a second electrode including a first linear electrode portion extending in a first direction. The counter substrate includes a third electrode including second linear electrode portions extending in a second direction crossing the first direction, and a fourth electrode including an island-shaped electrode portion as a floating electrode. The island-shaped electrode portion is disposed between the second linear electrode portions in a plan view, overlaps an optical aperture of one of two pixels adjacent to each other along the second direction, and does not overlap an optical aperture of the other of the two pixels.
    Type: Application
    Filed: August 28, 2023
    Publication date: April 4, 2024
    Inventors: Koji MURATA, Akira HIRAI, Hiroshi TSUCHIYA, Takashi SATOH, Akira SAKAI, Shinji SHIMADA
  • Publication number: 20240103314
    Abstract: Provided is a display device in which warping of a display panel is sufficiently reduced or prevented. The display device includes: a display panel; and a polarizer, the polarizer being provided with at least one notch that extends inward from an outer edge of the polarizer.
    Type: Application
    Filed: August 29, 2023
    Publication date: March 28, 2024
    Inventors: Ryosuke SAIGUSA, Akira SAKAI, Yuichi KAWAHIRA, Masahiro HASEGAWA
  • Patent number: 11934069
    Abstract: An optical element includes, sequentially from a viewing surface side toward a back surface side: a viewing-surface-side polarizer; a retarder; and a back-surface-side polarizer, a transmission axis of the viewing-surface-side polarizer and a transmission axis of the back-surface-side polarizer being parallel to each other, the optical element having an average angle ? between an angle ?1 and an angle ?2 of greater than 0° and smaller than 90°, wherein the angle ?1 represents an angle formed by an optical axis of the retarder on a surface close to the back surface with the surface close to the back surface; and the angle ?2 represents an angle formed by an optical axis of the retarder on a surface close to the viewing surface with the surface close to the viewing surface.
    Type: Grant
    Filed: August 23, 2022
    Date of Patent: March 19, 2024
    Assignee: SHARP DISPLAY TECHNOLOGY CORPORATION
    Inventors: Akira Sakai, Yuichi Kawahira, Masahiro Hasegawa, Ryosuke Saigusa
  • Publication number: 20240082711
    Abstract: A control system assists generation of a distribution content item representing progress of a video game played by a user. The control system includes at least one memory that stores a program; and at least one processor that executes the program to (i) provide the user with address information representing an address of material data on an effect material used for the distribution content item, (ii) under a control condition set in accordance with instructions from the user, update the material data in conjunction with progress of the video game played by the user, and (iii) in conjunction with the progress of the video game played by the user, transmit the material data to the editing system based on a request that uses the address information from an editing system that generates the distribution content item.
    Type: Application
    Filed: November 27, 2023
    Publication date: March 14, 2024
    Applicant: Konami Digital Entertainment Co., Ltd.
    Inventors: Shigeru CHIBA, Akira Sakai, Kai Inoue, Junki Hirai, Tsuguo Shinpo, Toshiaki Kanahara, Yoshihiko Narita
  • Patent number: 11927775
    Abstract: Provided are 3D glasses capable of reducing crosstalk when disposed on the viewer side of a liquid crystal panel that is time-divisionally driven; an optical device including the 3D glasses; and a three-dimensional image display device including the optical device. The 3D glasses include a right-eye polarizer and a left-eye polarizer, the right-eye polarizer and the left-eye polarizer each including a polarizing plate and a first ?/4 plate, at least one of the right-eye polarizer or the left-eye polarizer including a phase difference layer on or behind a back surface side of the polarizing plate, wherein a phase difference introduced by the right-eye polarizer in a thickness direction at a wavelength of 550 nm is different from a phase difference introduced by the left-eye polarizer in the thickness direction at a wavelength of 550 nm.
    Type: Grant
    Filed: April 13, 2023
    Date of Patent: March 12, 2024
    Assignee: Sharp Display Technology Corporation
    Inventors: Masahiro Hasegawa, Akira Sakai, Kiyoshi Minoura
  • Patent number: 11927850
    Abstract: Provided is a liquid crystal display device having high luminance and high CR in a front direction and especially useful as a head-mounted liquid crystal display device, for example. The liquid crystal display device includes: a liquid crystal panel; an optical element; and a backlight, arranged in this order from a viewing surface side. The optical element includes a first polarizer, a retardation layer, and a second polarizer. The first polarizer, the retardation layer, and the second polarizer are arranged in this order from the viewing surface side. The first polarizer and the second polarizer are reflection polarizers. A reflection axis of the first polarizer and a reflection axis of the second polarizer are parallel to each other. In oblique directions at azimuths of 0°, 45°, and 90° at a polar angle of 60°, a polarization state of light incident on the first polarizer is elliptical polarization.
    Type: Grant
    Filed: May 10, 2023
    Date of Patent: March 12, 2024
    Assignee: Sharp Display Technology Corporation
    Inventors: Yuichi Kawahira, Masahiro Hasegawa, Ryosuke Saigusa, Akira Sakai
  • Patent number: 11874549
    Abstract: Provided are an optical element that can achieve both color difference control and luminance reduction at an oblique viewing angle, and a liquid crystal display device including the optical element and having excellent display quality. The optical element includes: a first polarizer; a first phase difference layer; a second phase difference layer; and a second polarizer, the first polarizer, the first phase difference layer, the second phase difference layer, and the second polarizer being arranged in the stated order, the first phase difference layer satisfying the formula nx>ny?nz, the second phase difference layer satisfying the formula nz>nx?ny, the first polarizer and the second polarizer being linear polarizers, transmission axes of the first polarizer and the second polarizer being parallel to each other, a slow axis of the first phase difference layer being orthogonal to a polarization axis of the first polarizer.
    Type: Grant
    Filed: May 19, 2023
    Date of Patent: January 16, 2024
    Assignee: Sharp Display Technology Corporation
    Inventors: Ryosuke Saigusa, Akira Sakai, Yuichi Kawahira, Masahiro Hasegawa
  • Patent number: 11869193
    Abstract: A method includes: inputting an image of a target to each of a first model for estimating a region of an annular face of the target, a second model for estimating a region in an outer circumference of the annular face and a third model for estimating a region in an inner circumference of the annular face, and outputting a region image, as an estimated region of the annular face, the region image being obtained by synthesizing first, second, and third elements. The first element is a region outputted as a result of the first model for calculating a sum set in the synthesizing, the second element is a region outputted as a result of the second model for calculating a sum set in the synthesizing, and the third element is a region outputted as a result of the third model for calculating a difference set in the synthesizing.
    Type: Grant
    Filed: January 8, 2021
    Date of Patent: January 9, 2024
    Assignees: Fujitsu Limited, RIKEN, NATIONAL CANCER CENTER
    Inventors: Akira Sakai, Masaaki Komatsu, Kanto Shozu
  • Patent number: 11849189
    Abstract: Provided is a video distribution system with which it is possible to improve the motivation of participants with respect to an event that is distributed as a recorded video. A video distribution system is connected via a network to user terminal devices, and distributes a recorded video obtained by recording status of a game event in which a plurality of participants participating therein, to the user terminal devices. And the video distribution system increases the prize money amount set for the game event according to selection of an amount increase option executed by each user via the user terminal device so as to be associated with the recorded video, and decides the individual prize money amount to be awarded to a target participant P based on the prize money amount at the end of a predetermined period.
    Type: Grant
    Filed: September 8, 2022
    Date of Patent: December 19, 2023
    Assignee: Konami Digital Entertainment Co., Ltd.
    Inventors: Akira Sakai, Shigeru Chiba, Kai Inoue, Junki Hirai, Tsuguo Shinpo, Toshiaki Kanahara, Yoshihiko Narita
  • Patent number: 11846365
    Abstract: A valve portion has a sleeve and a valve body inserted into the sleeve. A solenoid portion includes a stator core having a magnetic attraction core, a sliding core, a magnetic flux passage suppressing portion, a yoke having a bottom portion, a side surface portion, and a thin wall portion, a coil portion, a plunger, and a magnetic tubular base portion. The base portion has a first tubular portion in which a first outer peripheral surface of the sleeve is press-fitted into inside and fastened to the first outer peripheral surface, a flange portion that has an outer diameter larger than the outer diameter of the first tubular portion, is arranged on an outer side in a radial direction of a second outer peripheral surface of the magnetic attraction core, and is caulked and fixed to the thin wall portion while being in contact with the yoke inside the yoke.
    Type: Grant
    Filed: January 6, 2022
    Date of Patent: December 19, 2023
    Assignee: DENSO CORPORATION
    Inventor: Akira Sakai
  • Patent number: 11841575
    Abstract: A liquid crystal display device includes a first polarizing plate, a first substrate including a thin-film transistor, a liquid crystal layer containing liquid crystal molecules, a second substate, a second polarizing plate, and a backlight. The first polarizing plate, the first substate, the liquid crystal layer, the second substrate, the second polarizing plate, and the backlight are arranged in this order. The first substrate has a display area and a frame area placed on an outer edge of the display region. The liquid crystal display device has an ink layer between the frame area of the first substrate and the first polarizing plate. The liquid crystal display device has an internal reflectance ratio y of 0.2 to 0.3. The internal reflectance ratio y is expressed by Formula (1-1).
    Type: Grant
    Filed: April 13, 2023
    Date of Patent: December 12, 2023
    Assignee: Sharp Display Technology Corporation
    Inventors: Akira Hirai, Yuichi Kawahira, Akira Sakai
  • Publication number: 20230384634
    Abstract: Provided are an optical element that can achieve both color difference control and luminance reduction at an oblique viewing angle, and a liquid crystal display device including the optical element and having excellent display quality. The optical element includes: a first polarizer; a first phase difference layer; a second phase difference layer; and a second polarizer, the first polarizer, the first phase difference layer, the second phase difference layer, and the second polarizer being arranged in the stated order, the first phase difference layer satisfying the formula nx>ny?nz, the second phase difference layer satisfying the formula nz>nx?ny, the first polarizer and the second polarizer being linear polarizers, transmission axes of the first polarizer and the second polarizer being parallel to each other, a slow axis of the first phase difference layer being orthogonal to a polarization axis of the first polarizer.
    Type: Application
    Filed: May 19, 2023
    Publication date: November 30, 2023
    Inventors: Ryosuke SAIGUSA, Akira SAKAI, Yuichi KAWAHIRA, Masahiro HASEGAWA
  • Publication number: 20230375873
    Abstract: Provided is a liquid crystal display device sequentially including: a first polarizer; a liquid crystal panel; a second polarizer; a biaxial retarder; a third polarizer; and a backlight including a light source and a prism sheet disposed closer to the viewing surface side than the light source is. The prism sheet includes prisms arranged in multiple columns on a surface close to the viewing surface side. The liquid crystal display has a light diffusion property curve having no side lobe or having a side lobe satisfying a ratio of a local maximum luminance to a local minimum luminance of 1.35 or less, the light diffusion property curve being obtained by plotting a luminance in a white display state in a direction perpendicular to ridge lines of the prisms against a polar angle.
    Type: Application
    Filed: May 10, 2023
    Publication date: November 23, 2023
    Inventors: Yuichi KAWAHIRA, Masahiro HASEGAWA, Ryosuke SAIGUSA, Akira SAKAI
  • Patent number: 11822181
    Abstract: Provided is a liquid crystal display device sequentially including: a first polarizer; a liquid crystal panel; a second polarizer; a biaxial retarder; a third polarizer; and a backlight including a light source and a prism sheet disposed closer to the viewing surface side than the light source is. The prism sheet includes prisms arranged in multiple columns on a surface close to the viewing surface side. The liquid crystal display has a light diffusion property curve having no side lobe or having a side lobe satisfying a ratio of a local maximum luminance to a local minimum luminance of 1.35 or less, the light diffusion property curve being obtained by plotting a luminance in a white display state in a direction perpendicular to ridge lines of the prisms against a polar angle.
    Type: Grant
    Filed: May 10, 2023
    Date of Patent: November 21, 2023
    Assignee: Sharp Display Technology Corporation
    Inventors: Yuichi Kawahira, Masahiro Hasegawa, Ryosuke Saigusa, Akira Sakai
  • Publication number: 20230367156
    Abstract: Provided is a liquid crystal display device having high luminance and high CR in a front direction and especially useful as a head-mounted liquid crystal display device, for example. The liquid crystal display device includes: a liquid crystal panel; an optical element; and a backlight, arranged in this order from a viewing surface side. The optical element includes a first polarizer, a retardation layer, and a second polarizer. The first polarizer, the retardation layer, and the second polarizer are arranged in this order from the viewing surface side. The first polarizer and the second polarizer are reflection polarizers. A reflection axis of the first polarizer and a reflection axis of the second polarizer are parallel to each other. In oblique directions at azimuths of 0°, 45°, and 90° at a polar angle of 60°, a polarization state of light incident on the first polarizer is elliptical polarization.
    Type: Application
    Filed: May 10, 2023
    Publication date: November 16, 2023
    Inventors: Yuichi KAWAHIRA, Masahiro HASEGAWA, Ryosuke SAIGUSA, Akira SAKAI
  • Publication number: 20230333402
    Abstract: Provided are 3D glasses capable of reducing crosstalk when disposed on the viewer side of a liquid crystal panel that is time-divisionally driven; an optical device including the 3D glasses; and a three-dimensional image display device including the optical device. The 3D glasses include a right-eye polarizer and a left-eye polarizer, the right-eye polarizer and the left-eye polarizer each including a polarizing plate and a first ?/4 plate, at least one of the right-eye polarizer or the left-eye polarizer including a phase difference layer on or behind a back surface side of the polarizing plate, wherein a phase difference introduced by the right-eye polarizer in a thickness direction at a wavelength of 550 nm is different from a phase difference introduced by the left-eye polarizer in the thickness direction at a wavelength of 550 nm.
    Type: Application
    Filed: April 13, 2023
    Publication date: October 19, 2023
    Inventors: Masahiro HASEGAWA, Akira SAKAI, Kiyoshi MINOURA
  • Publication number: 20230333427
    Abstract: A liquid crystal display device includes a first polarizing plate, a first substrate including a thin-film transistor, a liquid crystal layer containing liquid crystal molecules, a second substrate, a second polarizing plate, and a backlight. The first polarizing plate, the first substrate, the liquid crystal layer, the second substrate, the second polarizing plate, and the backlight are arranged in this order. The first substrate has a display area and a frame area placed on an outer edge of the display region. The liquid crystal display device has an ink layer between the frame area of the first substrate and the first polarizing plate. The liquid crystal display device has an internal reflectance ratio y of 0.2 to 0.3. The internal reflectance ratio y is expressed by Formula (1-1).
    Type: Application
    Filed: April 13, 2023
    Publication date: October 19, 2023
    Inventors: Akira HIRAI, Yuichi KAWAHIRA, Akira SAKAI
  • Publication number: 20230314868
    Abstract: Provided is a liquid crystal display device in which reflection and light leakage from oblique directions are reduced or prevented. The liquid crystal display device includes, sequentially in the following order from a back surface side: a first polarizer; a liquid crystal panel; a second polarizer; a first retardation layer; and a third polarizer, wherein light transmitted in an oblique direction between the second polarizer and the third polarizer is elliptically polarized light.
    Type: Application
    Filed: March 28, 2023
    Publication date: October 5, 2023
    Inventors: Akira SAKAI, Ryosuke SAIGUSA, Yuichi KAWAHIRA, Masahiro HASEGAWA, Kiyoshi MINOURA
  • Patent number: 11774813
    Abstract: Provided are a liquid crystal display device that can increase light use efficiency and reduce external light reflection, and a method of producing the liquid crystal display device. The liquid crystal display device sequentially includes, from a back surface side toward a viewing surface side: a first substrate; a liquid crystal layer; and a second substrate, the liquid crystal display device including sub-pixels each including an optical opening allowing light to pass through, the first substrate sequentially including, from the back surface side toward the viewing surface side: a supporting substrate; a metal layer surrounding the optical openings; and a resist layer being superimposed with the metal layer and being in contact with the metal layer, an end of the resist layer being superimposed with an end of the metal layer and having a taper angle ? of 40° or more.
    Type: Grant
    Filed: December 9, 2022
    Date of Patent: October 3, 2023
    Assignee: Sharp Display Technology Corporation
    Inventors: Yuichi Kawahira, Akira Hirai, Akira Sakai