Patents by Inventor Koichi Miyachi

Koichi Miyachi 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: 11994775
    Abstract: In this liquid crystal display device, a plurality of pixels 30 are arranged in a display region. The liquid crystal display device comprises a first substrate 11 in which a pixel electrode 15 having slits 15a is provided, a second substrate disposed face to the first substrate 11, a liquid crystal layer 13 containing liquid crystal molecules that have negative dielectric anisotropy, a first alignment film 22, and a second alignment film 23. The slits 15a are positioned in each alignment region of a plurality of alignment regions in the pixels 30, and have oblique slit parts extending in an oblique direction with respect to sides of the pixels 30. The angle ? formed by the direction in which the oblique slit parts extends and a liquid crystal projection direction is 15 degrees or more and 85 degrees or less.
    Type: Grant
    Filed: July 21, 2020
    Date of Patent: May 28, 2024
    Assignee: JSR CORPORATION
    Inventors: Yoshihiko Kuroda, Koichi Miyachi
  • Patent number: 11635660
    Abstract: This liquid crystal display device has a plurality of pixels. Each pixel in the plurality of pixels includes first to fourth alignment regions; these first to fourth alignment regions are arranged in the longitudinal direction of the pixels, and the difference between any two alignment orientations in the first to fourth alignment regions is approximately equal to an integer multiple of 90 degrees. Of the pre-tilt angles defined by a first alignment film and a second alignment film in each of the first to fourth alignment regions, one pre-tilt angle is less than 90 degrees and the other pre-tilt angle is substantially 90 degrees. The optical alignment film is formed using a polymer having an optical alignment group in the side chain, and the content of the optical alignment group in the side chain of the polymer is less than 1.1 mmol/g.
    Type: Grant
    Filed: November 3, 2021
    Date of Patent: April 25, 2023
    Assignee: JSR CORPORATION
    Inventors: Koichi Miyachi, Yoshihiko Kuroda, Ryuzo Ono, Syunsuke Kawamata
  • Patent number: 11435609
    Abstract: The present invention provides a liquid crystal display device that, with photo-alignment films, can maintain a favorable voltage holding ratio for a long period of time and prevent generation of image sticking and stains on the display screen. The liquid crystal display device includes: an active-matrix liquid crystal panel; and a backlight, the liquid crystal panel including a liquid crystal layer, paired substrates holding the liquid crystal layer in between, and alignment films disposed on the liquid crystal layer side surfaces of the respective substrates, the alignment films each being a photo-alignment film formed from a material exhibiting photo-alignment performance, the liquid crystal layer containing a liquid crystal material and a radical scavenger.
    Type: Grant
    Filed: January 15, 2021
    Date of Patent: September 6, 2022
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Koichi Miyachi, Masanobu Mizusaki, Tsuyoshi Okazaki, Hiroshi Tsuchiya, Isamu Miyake, Toshihiro Matsumoto
  • Publication number: 20220252943
    Abstract: In this liquid crystal display device, a plurality of pixels 30 are arranged in a display region. The liquid crystal display device comprises a first substrate 11 in which a pixel electrode 15 having slits 15a is provided, a second substrate disposed face to the first substrate 11, a liquid crystal layer 13 containing liquid crystal molecules that have negative dielectric anisotropy, a first alignment film 22, and a second alignment film 23. The slits 15a are positioned in each alignment region of a plurality of alignment regions in the pixels 30, and have oblique slit parts extending in an oblique direction with respect to sides of the pixels 30. The angle ? formed by the direction in which the oblique slit parts extends and a liquid crystal projection direction is 15 degrees or more and 85 degrees or less.
    Type: Application
    Filed: July 21, 2020
    Publication date: August 11, 2022
    Applicant: JSR CORPORATION
    Inventors: Yoshihiko KURODA, Koichi MIYACHI
  • Publication number: 20220057677
    Abstract: This liquid crystal display device has a plurality of pixels. Each pixel in the plurality of pixels includes first to fourth alignment regions; these first to fourth alignment regions are arranged in the longitudinal direction of the pixels, and the difference between any two alignment orientations in the first to fourth alignment regions is approximately equal to an integer multiple of 90 degrees. Of the pre-tilt angles defined by a first alignment film and a second alignment film in each of the first to fourth alignment regions, one pre-tilt angle is less than 90 degrees and the other pre-tilt angle is substantially 90 degrees. The optical alignment film is formed using a polymer having an optical alignment group in the side chain, and the content of the optical alignment group in the side chain of the polymer is less than 1.1 mmol/g.
    Type: Application
    Filed: November 3, 2021
    Publication date: February 24, 2022
    Applicant: JSR CORPORATION
    Inventors: Koichi MIYACHI, Yoshihiko KURODA, Ryuzo ONO, Syunsuke KAWAMATA
  • Publication number: 20210181551
    Abstract: A liquid crystal device 10 includes: a pair of substrates made up of a first substrate 11 and a second substrate 12 arranged facing each other; and a liquid crystal layer 14 interposed between the first substrate 11 and the second substrate 12. The liquid crystal device 10 does not have a liquid crystal alignment film formed on both the first substrate 11 and the second substrate 12. The second substrate 12 has a spacer 15a extending toward the first substrate 11 and the first substrate 11 has a suppressing part for mitigating the misalignment in the liquid crystal layer 14 due to the movement of the tip of the spacer 15s.
    Type: Application
    Filed: September 28, 2017
    Publication date: June 17, 2021
    Applicant: JSR CORPORATION
    Inventors: Ryuuzou OONO, Koji KASHISHITA, Yuusuke INOUE, Takahito KATOU, Koichi MIYACHI
  • Publication number: 20210132421
    Abstract: The present invention provides a liquid crystal display device that, with photo-alignment films, can maintain a favorable voltage holding ratio for a long period of time and prevent generation of image sticking and stains on the display screen. The liquid crystal display device includes: an active-matrix liquid crystal panel; and a backlight, the liquid crystal panel including a liquid crystal layer, paired substrates holding the liquid crystal layer in between, and alignment films disposed on the liquid crystal layer side surfaces of the respective substrates, the alignment films each being a photo-alignment film formed from a material exhibiting photo-alignment performance, the liquid crystal layer containing a liquid crystal material and a radical scavenger.
    Type: Application
    Filed: January 15, 2021
    Publication date: May 6, 2021
    Inventors: Koichi MIYACHI, Masanobu MIZUSAKI, Tsuyoshi OKAZAKI, Hiroshi TSUCHIYA, Isamu MIYAKE, Toshihiro MATSUMOTO
  • Patent number: 10921623
    Abstract: The present invention provides a liquid crystal display device that, with photo-alignment films, can maintain a favorable voltage holding ratio for a long period of time and prevent generation of image sticking and stains on the display screen. The liquid crystal display device includes: an active-matrix liquid crystal panel; and a backlight, the liquid crystal panel including a liquid crystal layer, paired substrates holding the liquid crystal layer in between, and alignment films disposed on the liquid crystal layer side surfaces of the respective substrates, the alignment films each being a photo-alignment film formed from a material exhibiting photo-alignment performance, the liquid crystal layer containing a liquid crystal material and a radical scavenger.
    Type: Grant
    Filed: December 11, 2018
    Date of Patent: February 16, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Koichi Miyachi, Masanobu Mizusaki, Tsuyoshi Okazaki, Hiroshi Tsuchiya, Isamu Miyake, Toshihiro Matsumoto
  • Patent number: 10914987
    Abstract: A complex (10) includes a liquid crystal component (13) and a support (11, 12) of the liquid crystal component (13), in which a lubricating interface derivation region (16) is formed between the liquid crystal component (13) and the support (11, 12). An optical element includes a pair of substrates (11, 12) having electrodes (18, 19) on at least one substrate (11), and a liquid crystal component (13) with which a space between the pair of substrates (11, 12) is filled, in which a lubricating interface derivation region (16) is formed between the pair of substrates (11, 12) and the liquid crystal component (13). It is preferable that the lubricating interface deriving agent (14) is present in the lubricating interface derivation region.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: February 9, 2021
    Assignees: KYOTO UNIVERSITY, KYUSHU UNIVERSITY, NAT'L UNIVERSITY CORPORATION, SHARP KABUSHIKI KAISHA, DIC CORPORATION
    Inventors: Jun Yamamoto, Masumi Yamashita, Waki Sakatsuji, Yoichi Takanishi, Shogo Kato, Hirotsugu Kikuchi, Yasushi Okumura, Hiroki Higuchi, Rijeesh Kizhakidathazhath, Takahito Kanzaki, Yudai Kawashima, Gimpei Machida, Hiroya Nishikawa, Koichi Miyachi, Kiyoshi Minoura, Isa Nishiyama
  • Publication number: 20200241336
    Abstract: A complex (10) includes a liquid crystal component (13) and a support (11, 12) of the liquid crystal component (13), in which a lubricating interface derivation region (16) is formed between the liquid crystal component (13) and the support (11, 12). An optical element includes a pair of substrates (11, 12) having electrodes (18, 19) on at least one substrate (11), and a liquid crystal component (13) with which a space between the pair of substrates (11, 12) is filled, in which a lubricating interface derivation region (16) is formed between the pair of substrates (11, 12) and the liquid crystal component (13). It is preferable that the lubricating interface deriving agent (14) is present in the lubricating interface derivation region.
    Type: Application
    Filed: August 26, 2016
    Publication date: July 30, 2020
    Applicants: Kyoto University, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, Sharp Kabushiki Kaisha, DIC Corporation
    Inventors: Jun Yamamoto, Masumi Yamashita, Waki Sakatsuji, Yoichi Takanishi, Shogo Kato, Hirotsugu Kikuchi, Yasushi Okumura, Hiroki Higuchi, Rijeesh Kizhakidathazhath, Takahito Kanzaki, Yudai Kawashima, Gimpei Machida, Hiroya Nishikawa, Koichi Miyachi, Kiyoshi Minoura, Isa Nishiyama
  • Publication number: 20200041848
    Abstract: A liquid crystal device 10 includes: a pair of substrates including a first substrate 11 and a second substrate 12 arranged to face each other; and a liquid crystal layer 14 that is arranged between the first substrate 11 and the second substrate 12. This liquid crystal device 10 is configured such that, among the first substrate 11 and the second substrate 12, a liquid crystal alignment film 13 is formed on the liquid crystal layer 14-side surface of the first substrate 11, but no liquid crystal alignment film is formed on the liquid crystal layer 14-side surface of the second substrate 12.
    Type: Application
    Filed: September 28, 2017
    Publication date: February 6, 2020
    Applicant: JSR CORPORATION
    Inventors: Yuusuke INOUE, Koji KASHISHITA, Ryuuzou OONO, Takahito KATOU, Koichi MIYACHI
  • Publication number: 20190285951
    Abstract: This liquid crystal display device is provided with: a first substrate; a second substrate that faces the first substrate; a liquid crystal layer that is arranged between the first substrate and the second substrate; and liquid crystal alignment films (a first alignment film and a second alignment film) that are formed on the first substrate and the second substrate, respectively. The first substrate and the second substrate respectively have an electrode on the liquid crystal layer side surfaces. At least one of the first alignment film and the second alignment film is a photo-alignment film. Each pixel has a plurality of alignment regions, in which the alignment directions of liquid crystal molecules are different from each other, within the pixel. The liquid crystal layer has negative dielectric anisotropy, while having a thickness of 2.9 ?m or less.
    Type: Application
    Filed: November 30, 2017
    Publication date: September 19, 2019
    Applicant: JSR CORPORATION
    Inventors: Koichi MIYACHI, Yoshiaki MARUYAMA, Shiro HIROTA
  • Publication number: 20190113781
    Abstract: The present invention provides a liquid crystal display device that, with photo-alignment films, can maintain a favorable voltage holding ratio for a long period of time and prevent generation of image sticking and stains on the display screen. The liquid crystal display device includes: an active-matrix liquid crystal panel; and a backlight, the liquid crystal panel including a liquid crystal layer, paired substrates holding the liquid crystal layer in between, and alignment films disposed on the liquid crystal layer side surfaces of the respective substrates, the alignment films each being a photo-alignment film formed from a material exhibiting photo-alignment performance, the liquid crystal layer containing a liquid crystal material and a radical scavenger.
    Type: Application
    Filed: December 11, 2018
    Publication date: April 18, 2019
    Inventors: Koichi MIYACHI, Masanobu MIZUSAKI, Tsuyoshi OKAZAKI, Hiroshi TSUCHIYA, Isamu MIYAKE, Toshihiro MATSUMOTO
  • Patent number: 10203558
    Abstract: The present invention provides a liquid crystal display device that maintains a sufficient voltage holding ratio over a long period of time even when a liquid crystal panel having a narrower frame is used and that undergoes no burn-in or no stains on a display screen. The liquid crystal display device of the present invention includes an active-matrix liquid crystal panel and a backlight, wherein the liquid crystal panel includes a liquid crystal layer, a pair of substrates between which the liquid crystal layer is sandwiched, alignment layers disposed on surfaces of the pair of substrates facing the liquid crystal layer, and a seal part that bonds the pair of substrates to each other and that is disposed around the liquid crystal layer, and the liquid crystal panel is formed by a liquid crystal one-drop fill process, wherein the liquid crystal layer includes a liquid crystal material and at least one of a radical scavenger and an antioxidant, and the seal part has a width of 0.6 mm or less at least in part.
    Type: Grant
    Filed: August 24, 2015
    Date of Patent: February 12, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Koichi Miyachi, Masanobu Mizusaki, Tsuyoshi Okazaki, Hiroshi Tsuchiya, Isamu Miyake, Toshihiro Matsumoto
  • Patent number: 10197829
    Abstract: The present invention provides a liquid crystal display device that, with photo-alignment films, can maintain a favorable voltage holding ratio for a long period of time and prevent generation of image sticking and stains on the display screen. The liquid crystal display device includes: an active-matrix liquid crystal panel; and a backlight, the liquid crystal panel including a liquid crystal layer, paired substrates holding the liquid crystal layer in between, and alignment films disposed on the liquid crystal layer side surfaces of the respective substrates, the alignment films each being a photo-alignment film formed from a material exhibiting photo-alignment performance, the liquid crystal layer containing a liquid crystal material and a radical scavenger.
    Type: Grant
    Filed: August 24, 2015
    Date of Patent: February 5, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Koichi Miyachi, Masanobu Mizusaki, Tsuyoshi Okazaki, Hiroshi Tsuchiya, Isamu Miyake, Toshihiro Matsumoto
  • Patent number: 10126859
    Abstract: A touch panel includes: a first substrate; a second substrate disposed on a viewer side of the first substrate; a liquid crystal layer provided between the first substrate and the second substrate; a plurality of pixel electrodes and a common electrode for applying a voltage to the liquid crystal layer; and a plurality of detection electrodes and a plurality of driving electrodes for a touch sensor. The first substrate includes: a first transparent substrate; and the plurality of pixel electrodes, which are formed on the liquid crystal layer side of the first transparent substrate. The second substrate includes: a second transparent substrate; and the plurality of driving electrodes and the plurality of detection electrodes formed on the liquid crystal layer side of the second transparent substrate. The touch panel does not include a conductive layer on the viewer side of the second transparent substrate.
    Type: Grant
    Filed: February 19, 2015
    Date of Patent: November 13, 2018
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Yasuhiro Sugita, Kenshi Tada, Hiroyuki Ogawa, Shinji Yamagishi, Jean Mugiraneza, Koichi Miyachi, Hidefumi Yoshida, Mitsuhiro Murata, Kohhei Tanaka
  • Patent number: 10042207
    Abstract: The present invention provides a liquid crystal display panel and a liquid crystal display device having excellent display quality, with reduced string-like defects that occur in display pixels. The liquid crystal display panel of the present invention includes multiple spacers between a pair of substrates, wherein the spacers are arranged such that an inter-spacer distance between adjacent spacers in a longitudinal direction is different from an inter-spacer distance between adjacent spacers in a transverse direction, and an angle formed between a line connecting the spacers with a shorter inter-spacer distance and an alignment direction of liquid crystal molecules at a voltage lower than a threshold voltage in the liquid crystal layer is 20° or smaller.
    Type: Grant
    Filed: August 11, 2017
    Date of Patent: August 7, 2018
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Isamu Miyake, Koichi Miyachi
  • Patent number: 9995967
    Abstract: The present invention provides a liquid crystal display device with reduced power consumption as well as reduced flicker. The liquid crystal display device is one in a transverse electric field mode, including: paired substrates; a photo-alignment film disposed on at least one of the substrates; a horizontal alignment liquid crystal layer disposed between the substrates; and pixels arranged in a matrix form, the liquid crystal layer containing liquid crystal molecules with a bicyclohexyl skeleton and liquid crystal molecules with a difluorobenzene skeleton, the liquid crystal layer having negative anisotropy of dielectric constant, one of the substrates including TFTs disposed in the respective pixels, the TFTs each including a semiconductor layer that contains an oxide semiconductor, the liquid crystal display device having a frame rate of lower than 50 Hz.
    Type: Grant
    Filed: July 22, 2015
    Date of Patent: June 12, 2018
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Isamu Miyake, Koichi Miyachi
  • Patent number: 9977290
    Abstract: The present invention provides a method for manufacturing a liquid crystal display device including a photo-alignment film and capable of sufficiently improving the display quality. The method for manufacturing a liquid crystal display device of the present invention is a method for manufacturing a liquid crystal display device including a photo-alignment film.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: May 22, 2018
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Isamu Miyake, Koichi Miyachi, Hiroaki Asagi
  • Patent number: 9864236
    Abstract: The present invention provides a method for manufacturing a liquid crystal display device capable of suppressing display unevenness around a seal in the case of performing PS treatment on a horizontal alignment film formed from a photoactive material. The method for manufacturing a liquid crystal display device of the present invention includes the steps of: forming a horizontal alignment film containing a photoactive material on at least one substrate of a pair of substrates; dropping a liquid crystal composition containing a liquid crystal material and a monomer on one of the pair of substrates, the monomer being contained in an amount of 1.
    Type: Grant
    Filed: May 3, 2017
    Date of Patent: January 9, 2018
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Isamu Miyake, Koichi Miyachi, Yuko Teraoka