Patents by Inventor Hiroshi Umeda

Hiroshi Umeda 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: 10545371
    Abstract: A liquid crystal display device includes a liquid crystal panel including a plurality of pixels that are arranged in a matrix pattern, a backlight provided on a back surface side of the liquid crystal panel to emit light for illuminating the liquid crystal panel, and a viewing angle restriction film provided between the liquid crystal panel and the backlight to narrow light distribution of the light emitted from the backlight in one direction. Each pixel includes a plurality of sub-pixels that are arranged correspondingly to a plurality of display colors. An aperture in each sub-pixel is elongated in the one direction in a surface of the liquid crystal panel.
    Type: Grant
    Filed: January 22, 2018
    Date of Patent: January 28, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akimasa Yuki, Hiroshi Umeda, Takashi Tajiri
  • Patent number: 10473970
    Abstract: In a liquid crystal display, a liquid crystal cell and a polarizing plate respectively have a planar, non-rectangular shape. The polarizing plate has an axis that is either an absorption axis or a slow axis. The planar shape of the polarizing plate includes first and second sides respectively extending in a direction perpendicular to the axis and a direction tilted from the axis. The polarizing plate includes first and second peripheral portions respectively lying along the first and second sides, and includes a corner portion lying at a portion where the first and second peripheral portions overlap each other. The polarizing plate is applied by a bonding agent onto a main surface of the liquid crystal cell so that the corner portion is not coupled to the main surface. A contour portion extending in a direction tilted from the axis may not be coupled to the main surface.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: November 12, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroshi Umeda, Manabu Iwakawa
  • Publication number: 20190324310
    Abstract: A liquid crystal display apparatus of the present invention includes a housing holding an outer peripheral portion of a liquid crystal panel with gap portions provided in a central portion thereof such that a curvature of a curved shape is variable when a surface pressing stress is applied, in which columnar spacers are arranged at a higher density in a region of the central portion in a curve direction than in a region of a peripheral portion, the density being the density of the columnar spacers holding a gap between glass substrates in a display region of the curved liquid crystal panel.
    Type: Application
    Filed: April 1, 2019
    Publication date: October 24, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yukihiro KUDO, Koji YONEMURA, Hiroshi UMEDA
  • Patent number: 10429709
    Abstract: A pretilt angle of a liquid crystal molecule on the side of an array substrate is formed such that the liquid crystal molecule goes away from the array substrate in a direction to the left when viewed from a position facing a display surface of a liquid crystal panel. The pretilt angle on the side of a counter substrate is formed such that the liquid crystal molecule goes away from the counter substrate in a direction to the right when viewed from a position facing the display surface. The directions to the left and the right define a direction X corresponding to a horizontal direction of the liquid crystal panel. A direction of a delay phase axis of a biaxial phase difference film is arranged in a position rotated anticlockwise in an angular range from over 0° to 1° from the direction X.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: October 1, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Koji Yonemura, Hiroshi Umeda, Kazunori Okumoto
  • Publication number: 20190252846
    Abstract: A high-voltage pulse generator may include a number “n” (n is a natural number of not less than 2) of primary electric circuits connected in parallel to one another on the primary side of a pulse transformer, and a secondary electric circuit of the pulse transformer, which is connected to a pair of discharge electrodes disposed in a laser chamber of a gas laser apparatus. The “n” primary electric circuits may include a number “n” of primary coils connected in parallel to one another, a number “n” of capacitors respectively connected in parallel to the “n” primary coils, and a number “n” of switches respectively connected in series to the “n” capacitors. The “n” primary electric circuits may be connected to a number “n” of chargers for charging the “n” capacitors, respectively.
    Type: Application
    Filed: April 26, 2019
    Publication date: August 15, 2019
    Applicants: National University Corporation Nagaoka University of Technology, Gigaphoton Inc.
    Inventors: Weihua JIANG, Hiroshi UMEDA, Hakaru MIZOGUCHI, Takashi MATSUNAGA, Hiroaki TSUSHIMA, Tomoyuki OHKUBO
  • Publication number: 20190148905
    Abstract: A discharge excitation gas laser device includes: first and second discharge electrodes disposed to face each other; a plurality of peaking capacitors connected to the first discharge electrode; a charger; a plurality of pulse power modules, each one of the pulse power modules including a charging capacitor to which a charged voltage is applied from the charger, a pulse compression circuit that pulse-compresses and outputs electrical energy stored in the charging capacitor as an output pulse to a corresponding peaking capacitor, and a switch disposed between the charging capacitor and the pulse compression circuit; a plurality of output pulse sensors, each one of the output pulse sensors detecting an output pulse output by a corresponding pulse power module; and a control unit configured to control, based on a detection result of each of the output pulse sensor, a tinting of a switch signal to be input to a corresponding switch.
    Type: Application
    Filed: December 26, 2018
    Publication date: May 16, 2019
    Applicant: GIGAPHOTON INC.
    Inventors: Hiroshi UMEDA, Osamu WAKABAYASHI
  • Patent number: 10290992
    Abstract: The laser system includes a first laser apparatus, a second laser apparatus, a charging voltage measuring unit configured to measure the charging voltage of the first storage capacitor and the charging voltage of the second storage capacitor, at least one bleeding circuit configured to reduce the charging voltage of the first storage capacitor and the charging voltage of the second storage capacitor, and a bleeding circuit controller configured to control the at least one bleeding circuit based on the voltage measured by the charging voltage measuring unit.
    Type: Grant
    Filed: February 13, 2018
    Date of Patent: May 14, 2019
    Assignee: Gigaphoton Inc.
    Inventors: Hiroshi Umeda, Osamu Wakabayashi
  • Publication number: 20190056619
    Abstract: A liquid crystal display device according to the present invention includes an array substrate and a CF substrate. The CF substrate includes a lattice-shaped light shielding pattern between pixel electrodes and a columnar spacer at an intersection of the light shielding patterns. The array substrate and the CF substrate are disposed so as to face each other with a liquid crystal layer interposed therebetween. The intersection includes a portion in which signal lines intersect each other and a portion in which the signal lines do not intersect each other, whereby a step is provided on a surface of the array substrate. The columnar spacer includes a main spacer in the portion in which the signal lines intersect each other and a sub-spacer in the portion in which the signal lines do not intersect each other.
    Type: Application
    Filed: July 23, 2018
    Publication date: February 21, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventor: Hiroshi UMEDA
  • Patent number: 10103509
    Abstract: The excimer laser device receives data on a target value of pulse energy from an external device and outputs a pulse laser beam. The excimer laser device includes a master oscillator, at least one power amplifier including a chamber provided in an optical path of the pulse laser beam outputted from the master oscillator, a pair of electrodes provided in the chamber, and an electric power source configured to apply voltage to the pair of electrodes, and a controller configured to control the electric power source of one power amplifier of the at least one power amplifier to stop applying the voltage to the pair of electrodes based on the target value of the pulse energy.
    Type: Grant
    Filed: December 10, 2017
    Date of Patent: October 16, 2018
    Assignee: Gigaphoton Inc.
    Inventors: Kouji Kakizaki, Akira Suwa, Osamu Wakabayashi, Hiroshi Umeda
  • Patent number: 10096966
    Abstract: A gas laser device may include: a laser chamber containing laser gas; a first discharge electrode disposed in the laser chamber; a second discharge electrode disposed to face the first discharge electrode in the laser chamber; and a condenser including a polyimide dielectric and configured to supply power to between the first discharge electrode and the second discharge electrode.
    Type: Grant
    Filed: October 11, 2016
    Date of Patent: October 9, 2018
    Assignee: Gigaphoton Inc.
    Inventors: Akira Suwa, Kouji Kakizaki, Hiroaki Tsushima, Tomoyuki Ohkubo, Hiroshi Umeda, Hisakazu Katsuumi
  • Publication number: 20180224697
    Abstract: A liquid crystal display device includes a liquid crystal panel including a plurality of pixels that are arranged in a matrix pattern, a backlight provided on a back surface side of the liquid crystal panel to emit light for illuminating the liquid crystal panel, and a viewing angle restriction film provided between the liquid crystal panel and the backlight to narrow light distribution of the light emitted from the backlight in one direction. Each pixel includes a plurality of sub-pixels that are arranged correspondingly to a plurality of display colors. An aperture in each sub-pixel is elongated in the one direction in a surface of the liquid crystal panel.
    Type: Application
    Filed: January 22, 2018
    Publication date: August 9, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventors: Akimasa YUKI, Hiroshi UMEDA, Takashi TAJIRI
  • Patent number: 10036925
    Abstract: A liquid crystal display device includes: a display panel which includes a TFT array substrate and a CF substrate arranged as opposed to each other, and a liquid crystal held therebetween; and a front panel which is adhered to a front surface side of the display panel with a resin layer interposed therebetween. A display region of the display panel is provided with main spacers formed on the CF substrate and making contact with the TFT array substrate, and sub-spacers formed on the CF substrate and not reaching the TFT array substrate. A ratio of a total contact area of the main spacers and the TFT array substrate with respect to an area of the display region of the liquid crystal panel is equal to or smaller than 0.02%.
    Type: Grant
    Filed: May 25, 2017
    Date of Patent: July 31, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Koji Yonemura, Hiroshi Umeda
  • Patent number: 10018776
    Abstract: An illumination device (11) includes a light guide plate (15) and a light source unit (10) which includes a substrate (12) and a plurality of LED chips (16) disposed on the substrate (12), and which is disposed in a position at which emitted light of the LED chips (16) enters a light entrance portion (15a) of the light guide plate (15). The LED chips (16) are disposed to form a plurality of rows on the substrate (12), and are disposed to line up in a direction which orthogonally intersects the rows between each of the rows.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: July 10, 2018
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masayuki Itoh, Hiroshi Umeda, Kazuo Tamaki, Masanobu Okano, Yusuke Shibata, Manabu Onozaki, Atsushi Yamashita
  • Publication number: 20180191124
    Abstract: The laser system includes a first laser apparatus, a second laser apparatus, a charging voltage measuring unit configured to measure the charging voltage of the first storage capacitor and the charging voltage of the second storage capacitor, at least one bleeding circuit configured to reduce the charging voltage of the first storage capacitor and the charging voltage of the second storage capacitor, and a bleeding circuit controller configured to control the at least one bleeding circuit based on the voltage measured by the charging voltage measuring unit.
    Type: Application
    Filed: February 13, 2018
    Publication date: July 5, 2018
    Applicant: Gigaphoton Inc.
    Inventors: Hiroshi UMEDA, Osamu WAKABAYASHI
  • Patent number: 9991665
    Abstract: The laser system may include a delay circuit unit, first and second trigger-correction units, and a clock generator. The delay circuit unit may receive a trigger signal, output a first delay signal obtained by delaying the trigger signal by a first delay time, and output a second delay signal obtained by delaying the trigger signal by a second delay time. The first trigger-correction unit may receive the first delay signal and output a first switch signal obtained by delaying the first delay signal by a first correction time. The second trigger-correction unit may receive the second delay signal and output a second switch signal obtained by delaying the second delay signal by a second correction time. The clock generator may generate a clock signal that is common to the delay circuit unit and the first and second trigger-correction units.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: June 5, 2018
    Assignee: Gigaphoton Inc.
    Inventors: Hiroshi Umeda, Takeshi Asayama, Osamu Wakabayashi
  • Patent number: 9961755
    Abstract: An extreme ultraviolet light generation device may include: a chamber earthed to a ground, in which extreme ultraviolet light is generated by irradiating a metal target supplied inside with laser light; a target supply unit earthed to the ground and configured to output the target supplied into the chamber from a nozzle; an extraction electrode configured to exert electrostatic force on the target by applying a negative first potential to the extraction electrode; a first power supply configured to apply the first potential to the extraction electrode; an acceleration electrode unit configured to accelerate the target by applying a negative second potential lower than the first potential to the acceleration electrode unit; a second power supply configured to apply the second potential to the acceleration electrode unit; and a charge neutralizer disposed inside the acceleration electrode unit and configured to emit electrons onto the target.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: May 1, 2018
    Assignee: Gigaphoton Inc.
    Inventors: Hiroshi Umeda, Kazukiyo Kamikanna
  • Publication number: 20180102622
    Abstract: The excimer laser device receives data on a target value of pulse energy from an external device and outputs a pulse laser beam. The excimer laser device includes a master oscillator, at least one power amplifier including a chamber provided in an optical path of the pulse laser beam outputted from the master oscillator, a pair of electrodes provided in the chamber, and an electric power source configured to apply voltage to the pair of electrodes, and a controller configured to control the electric power source of one power amplifier of the at least one power amplifier to stop applying the voltage to the pair of electrodes based on the target value of the pulse energy.
    Type: Application
    Filed: December 10, 2017
    Publication date: April 12, 2018
    Applicant: Gigaphoton Inc.
    Inventors: Kouji KAKIZAKI, Akira SUWA, Osamu WAKABAYASHI, Hiroshi UMEDA
  • Patent number: 9869909
    Abstract: Provided is a liquid crystal display apparatus capable of preventing a disclination and minimizing a decrease in contrast ratio caused by leakage of light. A counter electrode formed on an array substrate has a plurality of slits within one pixel. The slit which is relatively short has bent edge portions in which edges of the slit are bent. The slits which are relatively long do not have bent edges.
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: January 16, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroshi Umeda, Manabu Iwakawa
  • Publication number: 20180013258
    Abstract: The laser system may include a delay circuit unit, first and second trigger-correction units, and a clock generator. The delay circuit unit may receive a trigger signal, output a first delay signal obtained by delaying the trigger signal by a first delay time, and output a second delay signal obtained by delaying the trigger signal by a second delay time. The first trigger-correction unit may receive the first delay signal and output a first switch signal obtained by delaying the first delay signal by a first correction time. The second trigger-correction unit may receive the second delay signal and output a second switch signal obtained by delaying the second delay signal by a second correction time. The clock generator may generate a clock signal that is common to the delay circuit unit and the first and second trigger-correction units.
    Type: Application
    Filed: September 25, 2017
    Publication date: January 11, 2018
    Applicant: Gigaphoton Inc.
    Inventors: Hiroshi UMEDA, Takeshi ASAYAMA, Osamu WAKABAYASHI
  • Publication number: 20180004024
    Abstract: A pretilt angle of a liquid crystal molecule on the side of an array substrate is formed such that the liquid crystal molecule goes away from the array substrate in a direction to the left when viewed from a position facing a display surface of a liquid crystal panel. The pretilt angle on the side of a counter substrate is formed such that the liquid crystal molecule goes away from the counter substrate in a direction to the right when viewed from a position facing the display surface. The directions to the left and the right define a direction X corresponding to a horizontal direction of the liquid crystal panel. A direction of a delay phase axis of a biaxial phase difference film is arranged in a position rotated anticlockwise in an angular range from over 0° to 1° from the direction X.
    Type: Application
    Filed: September 12, 2017
    Publication date: January 4, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventors: Koji YONEMURA, Hiroshi UMEDA, Kazunori OKUMOTO