Patents by Inventor Kazuhiro Ishiguchi

Kazuhiro Ishiguchi 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: 20230260869
    Abstract: A semiconductor device includes: a semiconductor element; sealing resin formed into a rectangular shape in a top view to seal the semiconductor element; a first heat radiation plate electrically connected to a first electrode, and protruding from a first side of the sealing resin in a top view; a second heat radiation plate electrically connected to a second electrode, and protruding from a second side facing the first side of the sealing resin in a top view; a first terminal electrically connected to the first electrode, and protruding from a third side intersecting with the first side of the sealing resin in a top view; and a second terminal electrically connected to the second electrode, and protruding from the third side of the sealing resin in a top view, wherein the first heat radiation plate and the second heat radiation plate can be fixed to the heatsink.
    Type: Application
    Filed: November 21, 2022
    Publication date: August 17, 2023
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yuki MATSUTAKA, Kazuhiro ISHIGUCHI
  • Patent number: 11094289
    Abstract: An adjustment is performed on input gradation values, and 1st-stage gradation values are obtained. When a color expressed by a set of the input gradation values is a single color of any one of R, G, and B, the 1st-stage gradation value is set to 0. Further, correction is performed for R, G, and B according to one-dimensional lookup tables, respectively, and correction is performed for W according to one-dimensional lookup tables. Further, a contribution amount of the gradation values obtained through correction of the former and the gradation values obtained through correction of the latter to output gradation values is changed according to a color expressed by a set of the 1st-stage gradation values.
    Type: Grant
    Filed: July 8, 2020
    Date of Patent: August 17, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shogo Tanaka, Kazuhiro Ishiguchi
  • Publication number: 20210027744
    Abstract: An adjustment is performed on input gradation values, and 1st-stage gradation values are obtained. When a color expressed by a set of the input gradation values is a single color of any one of R, G, and B, the 1st-stage gradation value is set to 0. Further, correction is performed for R, G, and B according to one-dimensional lookup tables, respectively, and correction is performed for W according to one-dimensional lookup tables. Further, a contribution amount of the gradation values obtained through correction of the former and the gradation values obtained through correction of the latter to output gradation values is changed according to a color expressed by a set of the 1st-stage gradation values.
    Type: Application
    Filed: July 8, 2020
    Publication date: January 28, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Shogo TANAKA, Kazuhiro ISHIGUCHI
  • Patent number: 10701338
    Abstract: Provided is a technique for enhancing the display quality of a stereoscopic image. A display apparatus includes a parallax barrier, a detector, a predictor, and a controller. The detector detects a position of an observer. The predictor predicts, on the basis of a plurality of positions detected by the detector at past times, the position of the observer at a time coming after the past times, at which the plurality of positions have been detected. The controller determines a parallax barrier pattern selectively switching a plurality of barriers to a light transmissive state, and controls the parallax barrier on the basis of the parallax barrier pattern.
    Type: Grant
    Filed: July 13, 2018
    Date of Patent: June 30, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventor: Kazuhiro Ishiguchi
  • Publication number: 20190037203
    Abstract: Provided is a technique for enhancing the display quality of a stereoscopic image. A display apparatus includes a parallax barrier, a detector, a predictor, and a controller. The detector detects a position of an observer. The predictor predicts, on the basis of a plurality of positions detected by the detector at past times, the position of the observer at a time coming after the past times, at which the plurality of positions have been detected. The controller determines a parallax barrier pattern selectively switching a plurality of barriers to a light transmissive state, and controls the parallax barrier on the basis of the parallax barrier pattern.
    Type: Application
    Filed: July 13, 2018
    Publication date: January 31, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventor: Kazuhiro ISHIGUCHI
  • Patent number: 10152935
    Abstract: R, G, and B are corrected according to a one-dimensional lookup table R_LUT, a one-dimensional lookup table G_LUT, and a one-dimensional lookup table B_LUT, respectively. W is corrected according to one-dimensional lookup tables W_LUT (R), W_LUT (G), and W_LUT (B). The extent of a contribution to post-correction tone values Rout, Gout, and Bout of each of tone values obtained from the former correction and tone values obtained from the latter correction is modified according to a color expressed by a group of pre-correction tone values Rin, Gin, and Bin. As the above-mentioned color is closer to white, the contribution to the tone values obtained from the latter correction increases.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: December 11, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shogo Tanaka, Kazuhiro Ishiguchi, Hidetsugu Suginohara
  • Patent number: 9900588
    Abstract: A display panel includes sub-pixel pairs arranged laterally at a predetermined pitch, the sub-pixel pair including two sub pixels displaying images for right and left eyes respectively. A parallax-barrier shutter panel includes sub apertures switching light-transmitting and light-blocking states by driving a liquid crystal layer held between two transparent substrates with transparent electrodes extending vertically. The sub apertures are arranged laterally at a pitch obtained by dividing a reference parallax-barrier pitch by N (N being an even number equal to or greater than four), the reference parallax-barrier pitch being determined on the basis of a predetermined design observation distance and the pitch of the sub-pixel pairs. The parallax-barrier shutter panel includes common driving areas obtained by dividing a display area laterally.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: February 20, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akimasa Yuuki, Tetsuya Satake, Yasunori Niwano, Toshiaki Fujino, Shuichi Kira, Kazunori Okumoto, Shingo Nagano, Yoshimitsu Ishikawa, Kazuhiro Ishiguchi
  • Patent number: 9779651
    Abstract: An image processing device includes: a terminal that receives an image signal for a display for displaying images in directions, the display including pixels having sub-pixels and a parallax optical element for directing light from each sub-pixel in a direction predetermined for each sub-pixel, the signal including a grayscale value of each sub-pixel; a memory that stores information indicating a defective sub-pixel displayed in a direction due to a defect of the parallax optical element; and a corrector that determines, using the grayscale value of a sub-pixel whose predetermined direction is another direction different from the predetermined direction of the defective sub-pixel, a grayscale value of the defective sub-pixel for the image displayed in the other direction, and outputs a corrected image signal including, as a grayscale value of the defective sub-pixel, the smaller of the grayscale value of the defective sub-pixel in the image signal and the determined value.
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: October 3, 2017
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hidetsugu Suginohara, Satoshi Yamanaka, Kazuhiro Ishiguchi
  • Publication number: 20170249888
    Abstract: R, G, and B are corrected according to a one-dimensional lookup table R_LUT, a one-dimensional lookup table G_LUT, and a one-dimensional lookup table B_LUT, respectively. W is corrected according to one-dimensional lookup tables W_LUT (R), W_LUT (G), and W_LUT (B). The extent of a contribution to post-correction tone values Rout, Gout, and Bout of each of tone values obtained from the former correction and tone values obtained from the latter correction is modified according to a color expressed by a group of pre-correction tone values Rin, Gin, and Bin. As the above-mentioned color is closer to white, the contribution to the tone values obtained from the latter correction increases.
    Type: Application
    Filed: February 23, 2017
    Publication date: August 31, 2017
    Applicant: Mitsubishi Electric Corporation
    Inventors: Shogo TANAKA, Kazuhiro ISHIGUCHI, Hidetsugu SUGINOHARA
  • Patent number: 9729848
    Abstract: The display device includes a display panel on which sub-pixel pairs are arranged in a lateral direction, and a parallax barrier shutter panel on which sub-openings that can be changed between a light transmittance state and a light-shielding state are arranged in a lateral direction. Arbitrary allocated number of adjacent sub-openings among the plural sub-openings belonging to a reference parallax barrier pitch are put into a light transmittance state, and the remaining sub-openings are put into a light-shielding state, so that a general opening is formed on the parallax barrier shutter panel. A sub-opening pitch of the sub-opening on the boundary part between the adjacent common driving areas is different from the sub-opening pitch of the other sub-openings.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: August 8, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yasunori Niwano, Toshiaki Fujino, Yoshimitsu Ishikawa, Syuichi Kira, Shingo Nagano, Kazuhiro Ishiguchi, Kazunori Okumoto, Akimasa Yuuki, Tetsuya Satake
  • Patent number: 9491446
    Abstract: An image processing device for receiving input image data in which multiple images displayed in mutually differing directions from a display are combined includes: a crosstalk correction processor for performing a crosstalk correction; and a response speed improvement correction processor for performing a response speed improvement correction. The crosstalk correction processor has an optical crosstalk correction processor for performing an optical crosstalk correction, and an electrical crosstalk correction processor for performing an electrical crosstalk correction. The optical crosstalk correction processor performs the correction based on the input image data and outputs optical crosstalk correction processed image data.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: November 8, 2016
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yuji Inoue, Hidetsugu Suginohara, Satoshi Yamanaka, Kazuhiro Ishiguchi
  • Publication number: 20160286193
    Abstract: The display device includes a display panel on which sub-pixel pairs are arranged in a lateral direction, and a parallax barrier shutter panel on which sub-openings that can be changed between a light transmittance state and a light-shielding state are arranged in a lateral direction. Arbitrary allocated number of adjacent sub-openings among the plural sub-openings belonging to a reference parallax barrier pitch are put into a light transmittance state, and the remaining sub-openings are put into a light-shielding state, so that a general opening is formed on the parallax barrier shutter panel. A sub-opening pitch of the sub-opening on the boundary part between the adjacent common driving areas is different from the sub-opening pitch of the other sub-openings.
    Type: Application
    Filed: June 10, 2016
    Publication date: September 29, 2016
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yasunori NIWANO, Toshiaki FUJINO, Yoshimitsu ISHIKAWA, Syuichi KIRA, Shingo NAGANO, Kazuhiro ISHIGUCHI, Kazunori OKUMOTO, Akimasa YUUKI, Tetsuya SATAKE
  • Patent number: 9402071
    Abstract: The display device includes a display panel on which sub-pixel pairs are arranged in a lateral direction, and a parallax barrier shutter panel on which sub-openings that can be changed between a light transmittance state and a light-shielding state are arranged in a lateral direction. Arbitrary allocated number of adjacent sub-openings among the plural sub-openings belonging to a reference parallax barrier pitch are put into a light transmittance state, and the remaining sub-openings are put into a light-shielding state, so that a general opening is formed on the parallax barrier shutter panel. A sub-opening pitch of the sub-opening on the boundary part between the adjacent common driving areas is different from the sub-opening pitch of the other sub-openings.
    Type: Grant
    Filed: September 23, 2013
    Date of Patent: July 26, 2016
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yasunori Niwano, Toshiaki Fujino, Yoshimitsu Ishikawa, Syuichi Kira, Shingo Nagano, Kazuhiro Ishiguchi, Kazunori Okumoto, Akimasa Yuuki, Tetsuya Satake
  • Publication number: 20160203751
    Abstract: An image processing device includes: a terminal that receives an image signal for a display for displaying images in directions, the display including pixels having sub-pixels and a parallax optical element for directing light from each sub-pixel in a direction predetermined for each sub-pixel, the signal including a grayscale value of each sub-pixel; a memory that stores information indicating a defective sub-pixel displayed in a direction due to a defect of the parallax optical element; and a corrector that determines, using the grayscale value of a sub-pixel whose predetermined direction is another direction different from the predetermined direction of the defective sub-pixel, a grayscale value of the defective sub-pixel for the image displayed in the other direction, and outputs a corrected image signal including, as a grayscale value of the defective sub-pixel, the smaller of the grayscale value of the defective sub-pixel in the image signal and the determined value.
    Type: Application
    Filed: June 20, 2013
    Publication date: July 14, 2016
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hidetsugu SUGINOHARA, Satoshi YAMANAKA, Kazuhiro ISHIGUCHI
  • Publication number: 20160198149
    Abstract: A display panel includes sub-pixel pairs arranged laterally at a predetermined pitch, the sub-pixel pair including two sub pixels displaying images for right and left eyes respectively. A parallax-barrier shutter panel includes sub apertures switching light-transmitting and light-blocking states by driving a liquid crystal layer held between two transparent substrates with transparent electrodes extending vertically. The sub apertures are arranged laterally at a pitch obtained by dividing a reference parallax-barrier pitch by N (N being an even number equal to or greater than four), the reference parallax-barrier pitch being determined on the basis of a predetermined design observation distance and the pitch of the sub-pixel pairs. The parallax-barrier shutter panel includes common driving areas obtained by dividing a display area laterally.
    Type: Application
    Filed: August 28, 2014
    Publication date: July 7, 2016
    Applicant: Mitsubishi Electric Corporation
    Inventors: Akimasa YUUKI, Tetsuya SATAKE, Yasunori NIWANO, Toshiaki FUJINO, Shuichi KIRA, Kazunori OKUMOTO, Shingo NAGANO, Yoshimitsu ISHIKAWA, Kazuhiro ISHIGUCHI
  • Patent number: 8736594
    Abstract: A potential generation circuit and a liquid crystal display device are provided that are capable of reducing power consumption with a simple circuit configuration. The potential generation circuit is a potential generation circuit for generating a common potential that is applied to a capacitive load, and includes a differential amplifier that has a positive input receiving a given set potential and a negative input receiving the common potential that is negatively fed back, a current amplifier that amplifies the output of the differential amplifier and outputs the common potential, a charge recovery capacitor that has one of its ends connected to a reference potential, and an anti-parallel diode that is connected between the other end of the charge recovery capacitor and the common potential.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: May 27, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventor: Kazuhiro Ishiguchi
  • Publication number: 20140085439
    Abstract: The display device includes a display panel on which sub-pixel pairs are arranged in a lateral direction, and a parallax barrier shutter panel on which sub-openings that can be changed between a light transmittance state and a light-shielding state are arranged in a lateral direction. Arbitrary allocated number of adjacent sub-openings among the plural sub-openings belonging to a reference parallax barrier pitch are put into a light transmittance state, and the remaining sub-openings are put into a light-shielding state, so that a general opening is formed on the parallax barrier shutter panel. A sub-opening pitch of the sub-opening on the boundary part between the adjacent common driving areas is different from the sub-opening pitch of the other sub-openings.
    Type: Application
    Filed: September 23, 2013
    Publication date: March 27, 2014
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yasunori NIWANO, Toshiaki FUJINO, Yoshimitsu ISHIKAWA, Syuichi KIRA, Shingo NAGANO, Kazuhiro ISHIGUCHI, Kazunori OKUMOTO, Akimasa YUUKI, Tetsuya SATAKE
  • Patent number: 8681148
    Abstract: An object of the invention to provide a method for maintaining display quality as much as possible and reducing a crosstalk amount. A method for correcting stereoscopic images according to the present invention has (a) at least one of a step of detecting a range of crosstalk and a crosstalk amount occurring on a left image or a right image as black-side correction data, and a step of detecting the range of crosstalk and the crosstalk amount as white-side correction data, based on crosstalk characteristic data, (b) at least one of a step of making the black-side correction data into lower-limit data, and a step of making the white-side correction data into upper-limit data; and (c) a step of gamma-converting the left image or the right image based on at least one of the lower-limit data and the upper-limit data.
    Type: Grant
    Filed: December 28, 2010
    Date of Patent: March 25, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventor: Kazuhiro Ishiguchi
  • Publication number: 20130321598
    Abstract: An image processing device for receiving input image data in which multiple images displayed in mutually differing directions from a display are combined includes: a crosstalk correction processor for performing a crosstalk correction; and a response speed improvement correction processor for performing a response speed improvement correction. The crosstalk correction processor has an optical crosstalk correction processor for performing an optical crosstalk correction, and an electrical crosstalk correction processor for performing an electrical crosstalk correction. The optical crosstalk correction processor performs the correction based on the input image data and outputs optical crosstalk correction processed image data.
    Type: Application
    Filed: January 31, 2012
    Publication date: December 5, 2013
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yuji Inoue, Hidetsugu Suginohara, Satoshi Yamanaka, Kazuhiro Ishiguchi
  • Publication number: 20130106471
    Abstract: A potential generation circuit and a liquid crystal display device are provided that are capable of reducing power consumption with a simple circuit configuration. The potential generation circuit is a potential generation circuit for generating a common potential that is applied to a capacitive load, and includes a differential amplifier that has a positive input receiving a given set potential and a negative input receiving the common potential that is negatively fed back, a current amplifier that amplifies the output of the differential amplifier and outputs the common potential, a charge recovery capacitor that has one of its ends connected to a reference potential, and an anti-parallel diode that is connected between the other end of the charge recovery capacitor and the common potential.
    Type: Application
    Filed: December 17, 2012
    Publication date: May 2, 2013
    Inventor: Kazuhiro ISHIGUCHI