Patents by Inventor Daisuke Sonoda

Daisuke Sonoda 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: 20170269417
    Abstract: Detection electrode wirings formed by an ITO film have a high resistance and the detection capability thereof is degraded with the increase of the size and/or resolution. A manufacturing method of a display device includes: (a) arranging liquid crystal between an array substrate and a counter substrate; (b) forming a metal layer and a low-reflection layer on the counter substrate after the step (a); (c) applying an overcoat film onto the metal layer and the low-reflection layer; and (d) curing the overcoat film to form a protection layer. The step (d) cures the overcoat film with light and heat.
    Type: Application
    Filed: June 5, 2017
    Publication date: September 21, 2017
    Inventors: Toshimasa ISHIGAKI, Daisuke SONODA, Tatsuya IDE, Koji ISHIZAKI, Yoshihiro WATANABE, Hayato KURASAWA, Masanobu IKEDA
  • Patent number: 9746977
    Abstract: To reduce disturbances in display of images due to static electricity without deteriorating optical properties in a display. The display includes a conductive pattern provided on the upper surface of the substrate, a protection layer provided on the upper surface of the substrate to cover the conductive pattern, and a conductive layer provided on the protection layer. The sheet resistance of the conductive pattern is not more than 8?/square. A ratio of the total sum of areas of portions of the plurality of sub-pixels that overlap the conductive pattern in a plan view to the total sum of the areas of the plurality of sub-pixels is 1 to 22%. A sheet resistance of the conductive layer is higher than the sheet resistance of the conductive pattern.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: August 29, 2017
    Assignee: Japan Display Inc.
    Inventors: Masanobu Ikeda, Koji Ishizaki, Hayato Kurasawa, Yoshihiro Watanabe, Toshimasa Ishigaki, Daisuke Sonoda, Tatsuya Ide
  • Publication number: 20170214343
    Abstract: Provided is a motor drive device which performs switching, with respect to a synchronous motor including a stator around which a motor winding is wound and a rotor holding a permanent magnet, from a synchronous operation in which the synchronous motor is synchronously driven to position-sensorless vector control in which a current supplied to the motor winding is controlled based on a position of the rotor. During the synchronous operation, the present motor drive device calculates, by estimation, an induced voltage error based on the detected current and voltage, performs control of an amplitude of a current instruction such that an error, of a target induced voltage, calculated based on an estimated induced voltage and based on an internal angle becomes equal to the induced voltage error, and switches the mode to the sensorless mode after the error is reduced to be within a range of a predetermined value.
    Type: Application
    Filed: August 28, 2015
    Publication date: July 27, 2017
    Inventors: DAISUKE SONODA, MITSUHIRO SAKAMOTO, TORU TAZAWA
  • Patent number: 9696575
    Abstract: Detection electrode wirings formed by an ITO film have a high resistance and the detection capability thereof is degraded with the increase of the size and/or resolution. A manufacturing method of a display device includes: (a) arranging liquid crystal between an array substrate and a counter substrate; (b) forming a metal layer and a low-reflection layer on the counter substrate after the step (a); (c) applying an overcoat film onto the metal layer and the low-reflection layer; and (d) curing the overcoat film to form a protection layer. The step (d) cures the overcoat film with light and heat.
    Type: Grant
    Filed: June 1, 2015
    Date of Patent: July 4, 2017
    Assignee: Japan Display Inc.
    Inventors: Toshimasa Ishigaki, Daisuke Sonoda, Tatsuya Ide, Koji Ishizaki, Yoshihiro Watanabe, Hayato Kurasawa, Masanobu Ikeda
  • Publication number: 20170176792
    Abstract: According to one embodiment, a display device includes a color filter formed on an inorganic layer, an inorganic film formed above the color filter, and a semiconductor layer formed above the inorganic film. As seen in plan view, the inorganic film is provided over a first area in which the color filter is overlapped and a second area which surrounds the first area. In the second area, the inorganic film is located outward of the color filter.
    Type: Application
    Filed: December 14, 2016
    Publication date: June 22, 2017
    Applicant: Japan Display Inc.
    Inventors: Daisuke SONODA, Osamu ITOU, Muneharu AKIYOSHI
  • Publication number: 20170176803
    Abstract: According to one embodiment, a display device includes a stacked conductive layer. The stacked conductive layer includes a first conductive layer formed of material containing aluminum, and a second conductive layer provided on the first conductive layer, formed of material different from material of which the first conductive layer is formed, and having a higher visible-light absorptivity than that of the first conductive layer. The first conductive layer includes a side wall formed of an oxide film.
    Type: Application
    Filed: December 15, 2016
    Publication date: June 22, 2017
    Applicant: Japan Display Inc.
    Inventors: Daisuke SONODA, Tatsuya IDE, Rintaro MAKINO
  • Publication number: 20170163194
    Abstract: A motor control device at least includes a speed control part for controlling a motor rotation speed. The motor control device includes a torque correction means for suppressing variation in torque constant due to individual differences of motors. In addition, the motor control device corrects the torque constant by using a correction torque coefficient calculated based on an unloaded speed when a fixed voltage is applied. Alternatively, the torque constant is corrected using the correction torque coefficient calculated based on the motor applied voltage when the motor speed is fixed.
    Type: Application
    Filed: January 26, 2016
    Publication date: June 8, 2017
    Inventors: MITSUHIRO SAKAMOTO, YASUYUKI YOKOUCHI, DAISUKE SONODA, RYUTA SASAKI
  • Publication number: 20170153753
    Abstract: According to one embodiment, a sensor-equipped display device includes a display panel including a sensor drive electrode and a detection electrode opposed to the sensor drive electrode and a driver, wherein the detection electrode includes a first layer formed in a thin line shape, and a second layer on the first layer in a plan view of the display area, the second layer having a reflectivity lower than that of the first layer, the outer edge of a second lower surface of the second layer is shifted with respect to the outer edge of a first upper surface of the first layer in a plan view, and the outermost outer edge of the second layer is positioned outside the outermost outer edge of the first layer in a plan view.
    Type: Application
    Filed: November 29, 2016
    Publication date: June 1, 2017
    Inventors: Koji ISHIZAKI, Daisuke SONODA, Tatsuya IDE, Hiroyuki ITO
  • Publication number: 20170139299
    Abstract: A provided is a liquid crystal display device with a high definition screen and less color mixture. On an array substrate, a pixel is formed between the adjacent video signal lines, a color filter is formed within the pixel, a flattening film is formed on the color filter, a lower layer is formed on the flattening film, and an upper layer having a slit is formed on the lower layer with an interlayer insulating film interposed therebetween; and on the array substrate, an opposite substrate is arranged with a liquid crystal layer interposed therebetween. When a distance from the top of the video signal line working as a light shielding film to the bottom of the liquid crystal layer is defined as d and a space between the centers of the video signal lines separating the pixel is defined as w, a relation of d?0.3w is satisfied.
    Type: Application
    Filed: January 31, 2017
    Publication date: May 18, 2017
    Inventors: Kenji NAKAO, Osamu ITOU, Toshimasa ISHIGAKI, Daisuke SONODA, Takato HIRATSUKA
  • Patent number: 9625772
    Abstract: In an LCD device, the slope angle of a wall surface of a wall structure (wall-surface slope angle) is varied in accordance with the angle formed between the wall structure and an alignment treatment direction (alignment treatment angle). At places where the alignment treatment angle is small, the wall-surface slope angle is made larger; conversely, at places where the alignment treatment angle is large, the wall-surface slope angle is made smaller.
    Type: Grant
    Filed: November 4, 2014
    Date of Patent: April 18, 2017
    Assignee: Japan Display Inc.
    Inventors: Osamu Itou, Takato Hiratsuka, Toshimasa Ishigaki, Daisuke Sonoda
  • Publication number: 20170090262
    Abstract: According to one embodiment, a liquid crystal display device, includes a first substrate including a scanning signal line, a video signal line, a first electrode, a color filter, a common line in contact with the first electrode along the video signal line, an antireflection layer located on the common line, a transparent layer located on the antireflection layer, and a second electrode, a liquid crystal layer located on the first substrate, and a second substrate located on the liquid crystal layer, the transparent layer having a thickness of 10 nm or more and 40 nm or less.
    Type: Application
    Filed: September 27, 2016
    Publication date: March 30, 2017
    Applicant: Japan Display Inc.
    Inventors: Osamu ITOU, Daisuke SONODA, Masahiro KOSUGE
  • Patent number: 9606389
    Abstract: The present invention provides a liquid crystal display device including: plural pixels disposed in a matrix shape, each pixel having insulating wall-shaped structures at the boundaries of the pixels and a small wall-shaped structure between the wall-shaped structures; wall electrodes, each having wall-shaped electrodes formed on the side faces of the wall-shaped structures, and planar electrodes that are connected to the wall-shaped electrodes and extend in the planar direction; electrodes, each having a TFT-side electrode covering the small wall-shaped structure and a storage capacitor electrode that is connected to the TFT-side electrode and extends in the planar direction of the substrate; and interlayer insulating films formed between the storage capacitor electrodes and the planar electrodes. And the interlayer insulating films of inorganic films are not formed on the upper and side faces and at the base portions of the wall-shaped structures at the boundaries of the pixels.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: March 28, 2017
    Assignee: Japan Display Inc.
    Inventors: Takato Hiratsuka, Osamu Itou, Masanao Yamamoto, Daisuke Sonoda, Toshimasa Ishigaki
  • Patent number: 9594278
    Abstract: A provided is a liquid crystal display device with a high definition screen and less color mixture. On an array substrate, a pixel is formed between the adjacent video signal lines, a color filter is formed within the pixel, a flattening film is formed on the color filter, a lower layer is formed on the flattening film, and an upper layer having a slit is formed on the lower layer with an interlayer insulating film interposed therebetween; and on the array substrate, an opposite substrate is arranged with a liquid crystal layer interposed therebetween. When a distance from the top of the video signal line working as a light shielding film to the bottom of the liquid crystal layer is defined as d and a space between the centers of the video signal lines separating the pixel is defined as w, a relation of d?0.3 w is satisfied.
    Type: Grant
    Filed: July 2, 2015
    Date of Patent: March 14, 2017
    Assignee: Japan Display Inc.
    Inventors: Kenji Nakao, Osamu Itou, Toshimasa Ishigaki, Daisuke Sonoda, Takato Hiratsuka
  • Patent number: 9568787
    Abstract: Pixel electrodes and a common electrode are formed on a first panel. A wall is formed on the first panel. The wall includes a large insulating wall that is made of an insulating material and projects toward a second panel, and a wall electrode part that covers a side wall of the large insulating wall and functions as the pixel electrode or the common electrode. The wall includes a side surface on which an alignment film that defines an alignment of liquid crystal molecules of a liquid crystal layer is formed. The side wall of the wall is inclined with respect to a direction perpendicular to the first panel and the second panel. With this configuration, in a liquid crystal display device having the wall electrode, light leakage at the time of displaying a black image can be reduced.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: February 14, 2017
    Assignee: Japan Display Inc.
    Inventors: Takato Hiratsuka, Osamu Itou, Daisuke Sonoda, Toshimasa Ishigaki
  • Patent number: 9500911
    Abstract: Provided is a liquid crystal display panel in which both the prevention of low-temperature bubble defects and the prevention of unevenness in brightness by pressure can be achieved without the need of forming multiple types of spacers differing in the height. In a liquid crystal display panel comprising a plurality of spacers 14 arranged between a pair of transparent substrates 11 and 12 and a liquid crystal 13 encapsulated between the transparent substrates, the spacers 14 are of a uniform height and each spacer 14 is substantially in a trapezoidal shape in which the ratio between the top area and the bottom area is 0.3 or less. The spacers 14 are formed on one of the transparent substrates 11 and 12. The spacers 14 are arranged at appropriate density so that the contact area ratio of the spacers' top surfaces in contact with the opposing substrate per unit area is within a range of 0.8%-1.0%.
    Type: Grant
    Filed: September 17, 2014
    Date of Patent: November 22, 2016
    Assignee: Japan Display Inc.
    Inventors: Toshimasa Ishigaki, Daisuke Sonoda, Miharu Otani, Tsutomu Ishibashi
  • Patent number: 9488884
    Abstract: In a liquid crystal display device having wall structures, the generation of low-temperature shock bubbles is suppressed. Also, electrodes and the like within substrates are prevented from being damaged during manufacturing. The liquid crystal display device includes a first substrate, a second substrate that is disposed to face the first substrate, a liquid crystal layer that is disposed between the first substrate and the second substrate, wall structures that are formed on the first substrate, pixel electrodes that are disposed on at least side wall of the wall structures, a common electrode that is formed on the first substrate, and a plurality of pixels including the pixel electrodes and the common electrode, in which higher portions are partially disposed on a surface of the second substrate, and the higher portions come into contact with the wall structures to bring the first substrate into contact with the second substrate.
    Type: Grant
    Filed: August 2, 2013
    Date of Patent: November 8, 2016
    Assignee: Japan Display Inc.
    Inventors: Takato Hiratsuka, Osamu Itou, Miharu Otani, Toshimasa Ishigaki, Daisuke Sonoda
  • Publication number: 20160291428
    Abstract: In a wall electrode liquid crystal display device, planar distribution of the wall structure and the electrode is optimized to improve a yield. A liquid crystal display device includes a plurality of pixels arranged in a matrix, each of the pixels having an insulator wall structure formed at a border of pixels, a wall electrode formed at a side surface of the wall structure of the border of the pixels, a source electrode which is continuous with the wall electrode and formed of a planar electrode extending in a planar direction, a first common electrode provided between source electrodes at both sides of the pixel to form a retentive capacitance, and a second common electrode provided between wall electrodes on both sides of the pixel. A slit which becomes a border of the wall electrodes of two adjacent pixels is disposed only on a top of the wall structure.
    Type: Application
    Filed: May 18, 2016
    Publication date: October 6, 2016
    Inventors: Osamu ITOU, Takato HIRATSUKA, Masanao YAMAMOTO, Toshimasa ISHIGAKI, Daisuke SONODA
  • Publication number: 20160178963
    Abstract: A color filter substrate includes an insulating substrate, a first pixel electrode, a second pixel electrode, a third pixel electrode, a first color filter disposed between the first pixel electrode and the insulating substrate, a second color filter disposed between the second pixel electrode and the insulating substrate, and a third color filter disposed between the third pixel electrode and the insulating substrate, wherein the first pixel electrode, the second pixel electrode, and the third pixel electrode are adjacent to each other, the first color filter has a first end, the second color filter has a second end, and the third color filter has a third end, and two of the first end, the second end, and the third end overlap in the first overlap area.
    Type: Application
    Filed: December 10, 2015
    Publication date: June 23, 2016
    Applicant: Japan Display Inc.
    Inventors: Osamu ITOU, Kenji NAKAO, Toshimasa ISHIGAKI, Daisuke SONODA
  • Patent number: 9366919
    Abstract: In a wall electrode liquid crystal display device, planar distribution of the wall structure and the electrode is optimized to improve a yield. A liquid crystal display device includes a plurality of pixels arranged in a matrix, each of the pixels having an insulator wall structure formed at a border of pixels, a wall electrode formed at a side surface of the wall structure of the border of the pixels, a source electrode which is continuous with the wall electrode and formed of a planar electrode extending in a planar direction, a first common electrode provided between source electrodes at both sides of the pixel to form a retentive capacitance, and a second common electrode provided between wall electrodes on both sides of the pixel. A slit which becomes a border of the wall electrodes of two adjacent pixels is disposed only on a top of the wall structure.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: June 14, 2016
    Assignee: Japan Display Inc.
    Inventors: Osamu Itou, Takato Hiratsuka, Masanao Yamamoto, Toshimasa Ishigaki, Daisuke Sonoda
  • Publication number: 20160154273
    Abstract: In an embodiment, a color filter substrate includes an substrate, first to fifth lines, first to third switching elements, first to third electrodes, color filter layer between electrodes and the substrate, and insulating layer with first to third apertures. The first electrode is formed in a first area defined by lines at the first line side, and the second electrode is formed in the first area at the second line side. The third electrode is formed in a second area defined by lines. Electrodes are connected to switching elements through apertures respectively. The first aperture is formed at the first line side, and the second aperture is formed at the second line side.
    Type: Application
    Filed: November 30, 2015
    Publication date: June 2, 2016
    Applicant: Japan Display Inc.
    Inventors: Osamu ITOU, Kenji NAKAO, Toshimasa ISHIGAKI, Daisuke SONODA