Patents by Inventor Yuki KURAMOTO

Yuki KURAMOTO 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: 9829750
    Abstract: According to one embodiment, A display device includes a first substrate includes an inorganic insulating film, a first wiring formed above the inorganic insulating film, an organic insulating film located above the inorganic insulating film and the first wiring, and a driver electrically connected to the first wiring, a second substrate opposing the first substrate, and a sealant fixing the first substrate and the second substrate, wherein the sealant comprises a first seal portion formed along a first edge of the first substrate and a second seal portion which crosses the first seal portion, and the first seal portion has a first width, and the second seal portion has a second width, the first width being greater than the second width.
    Type: Grant
    Filed: November 17, 2015
    Date of Patent: November 28, 2017
    Assignee: Japan Display Inc.
    Inventors: Taiki Makino, Tomokazu Ishikawa, Yuki Kuramoto
  • Patent number: 9810952
    Abstract: A liquid crystal display device is provided in which color unevenness can be reduced and inhibited in the peripheral display area even when the display device has a narrow frame. In the liquid crystal display device, liquid crystal sandwiched between a TFT substrate and a CF substrate and sealed by a seal is disposed in a frame portion. The CF substrate has a BM, a color resist film, an OC, an alignment film, and a wall that inhibits the alignment film from expanding outward. In the area where the wall is disposed, the BM and color resist film on the CF substrate are removed.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: November 7, 2017
    Assignee: Japan Display Inc.
    Inventor: Yuki Kuramoto
  • Publication number: 20170299910
    Abstract: Red pixels (R), blue pixels (B) and green pixels (G) are formed in parallel. First columnar spacers 10 and second columnar spacers 20 are formed on a first substrate. The distance between the first substrate and a second substrate in a normal state is determined by the first columnar spacers 10. The diameter of a light blocking film corresponding to each first columnar spacer 10 is greater than the diameter of a light blocking film corresponding to each second columnar spacer 20. The first columnar spacer 10 is not formed at a boundary between a green pixel (G) and a red pixel (R) or a boundary between a green pixel (G) and a blue pixel (B). The second columnar spacer 20 is formed at a boundary between pixels irrespective of the pixel color. Thus, appropriate color balance can be attained with ease without having a drop in the luminance.
    Type: Application
    Filed: July 3, 2017
    Publication date: October 19, 2017
    Inventors: Saori SUGIYAMA, Takanori NAKAYAMA, Yuki KURAMOTO
  • Publication number: 20170269404
    Abstract: An object of this invention is to increase the number of liquid crystal display panels obtained from a mother substrate. There is provided a liquid crystal display device including a TFT substrate and a counter substrate bonded together by a seal portion formed along the periphery of the counter substrate, the TFT substrate having a terminal area formed in a portion thereof not opposed to the counter substrate. The TFT substrate has a bank-like organic passivation film formed along the edge of the terminal area. A stepped part is formed on the organic passivation film. The film thickness of the organic passivation film on the edge side of the stepped part is greater than the film thickness inside the stepped part.
    Type: Application
    Filed: March 6, 2017
    Publication date: September 21, 2017
    Inventors: Tomokazu ISHIKAWA, Yuki KURAMOTO, Hitomi HASEGAWA
  • Publication number: 20170261785
    Abstract: In order to avoid generation of black unevenness caused by the water intrusion into a liquid crystal display device, there is to provide a liquid crystal display device including a display area and a terminal portion, in which a TFT substrate with an organic passivation film formed, and an opposite substrate are adhered to each other by a seal portion and a liquid crystal is enclosed there, wherein in, the seal portion of the TFT substrate, a groove-shaped through-hole is formed in the organic passivation film to surround the display area, a water absorption layer formed of the same material in the same process as that of the organic passivation film is formed within the groove-shaped through-hole, and the water absorption layer is not covered with the inorganic insulating film.
    Type: Application
    Filed: May 26, 2017
    Publication date: September 14, 2017
    Inventors: Tomonori NISHINO, Masato SHIMURA, Tomokazu ISHIKAWA, Yuki KURAMOTO, Satoshi HASHIMOTO
  • Patent number: 9759955
    Abstract: A liquid crystal display device includes: a TFT substrate including a TFT, an organic passivation film formed to cover the TFT, and an alignment film; and a counter substrate including a spacer and an alignment film. The TFT substrate and the counter substrate are bonded with a sealing material in a seal portion, with a liquid crystal interposed between the two substrates. A wall-like structure is formed in the seal portion of the counter substrate, in a direction parallel to a side of the counter substrate. A concave portion of the organic passivation film is formed at a position corresponding to the wall-like structure of the TFT substrate, in a direction parallel to the side of the TFT substrate. With this structure, a gap between the wall-like structure and the TFT substrate is increased to facilitate the movement of the sealing material before curing, to form the sealing material uniformly.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: September 12, 2017
    Assignee: Japan Display Inc.
    Inventors: Tomokazu Ishikawa, Yuki Kuramoto, Saori Sugiyama
  • Publication number: 20170235167
    Abstract: A liquid crystal display device has pixels in a TFT substrate, each of the pixels has a TFT. An organic insulting film 108 is formed to cover the TFT. A first electrode 109 and a second electrode 111 are formed above the organic insulting film 108 with an inorganic insulating film 110 placed between the first electrode 109 and the second electrode 111. An alignment film is formed on the first electrode 109 and the second electrode 111. The second electrode 111 connects with the TFT through a contact hole formed in the organic insulating film 108. A cross section of the organic insulating film 108 that includes the contact hole and is parallel to the second direction has a convex section and a concave section 70 at a bank located near the contact hole, the convex section being located closer to the contact hole than the concave section 70.
    Type: Application
    Filed: February 3, 2017
    Publication date: August 17, 2017
    Inventors: Tomokazu ISHIKAWA, Yuki KURAMOTO, Hiroshi MIYAIRI, Ryota KOBAYASHI, Katsuto SUGIMOTO
  • Patent number: 9726938
    Abstract: Red pixels (R), blue pixels (B) and green pixels (G) are formed in parallel. First columnar spacers 10 and second columnar spacers 20 are formed on a first substrate. The distance between the first substrate and a second substrate in a normal state is determined by the first columnar spacers 10. The diameter of a light blocking film corresponding to each first columnar spacer 10 is greater than the diameter of a light blocking film corresponding to each second columnar spacer 20. The first columnar spacer 10 is not formed at a boundary between a green pixel (G) and a red pixel (R) or a boundary between a green pixel (G) and a blue pixel (B). The second columnar spacer 20 is formed at a boundary between pixels irrespective of the pixel color. Thus, appropriate color balance can be attained with ease without having a drop in the luminance.
    Type: Grant
    Filed: October 13, 2015
    Date of Patent: August 8, 2017
    Assignee: Japan Display Inc.
    Inventors: Saori Sugiyama, Takanori Nakayama, Yuki Kuramoto
  • Patent number: 9696592
    Abstract: In order to avoid generation of black unevenness caused by the water intrusion into a liquid crystal display device, there is to provide a liquid crystal display device including a display area and a terminal portion, in which a TFT substrate with an organic passivation film formed and an opposite substrate are adhered to each other by a seal portion and a liquid crystal is enclosed there, wherein in the seal portion of the TFT substrate, a groove-shaped through-hole is formed in the organic passivation film to surround the display area, a water absorption layer formed of the same material in the same process as that of the organic passivation film is formed within the groove-shaped through-hole, and the water absorption layer is not covered with the inorganic insulating film.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: July 4, 2017
    Assignee: Japan Display Inc.
    Inventors: Tomonori Nishino, Masato Shimura, Tomokazu Ishikawa, Yuki Kuramoto, Satoshi Hashimoto
  • Publication number: 20160306224
    Abstract: According to one embodiment, a display device comprises a display panel and a polarizing plate. The display panel comprises a display area, a non-display area surrounding the display area, and a light-shielding layer arranged in the display area and the non-display area. The polarizing plate is provided on a surface of the display panel, and including an end portion located in the non-display area. In this display device, the light-shielding layer opposite to the end portion of the polarizing plate is at least partially removed.
    Type: Application
    Filed: April 4, 2016
    Publication date: October 20, 2016
    Applicant: Japan Display Inc.
    Inventors: Tomokazu ISHIKAWA, Yuki Kuramoto, Haruki Yamada, Katsuhiro Kato
  • Publication number: 20160259189
    Abstract: A liquid crystal display device is provided in which color unevenness can be reduced and inhibited in the peripheral display area even when the display device has a narrow frame. In the liquid crystal display device, liquid crystal sandwiched between a TFT substrate and a CF substrate and sealed by a seal is disposed in a frame portion. The CF substrate has a BM, a color resist film, an OC, an alignment film, and a wall that inhibits the alignment film from expanding outward. In the area where the wall is disposed, the BM and color resist film on the CF substrate are removed.
    Type: Application
    Filed: May 18, 2016
    Publication date: September 8, 2016
    Inventor: Yuki KURAMOTO
  • Publication number: 20160246093
    Abstract: A liquid crystal display device includes a thin film transistor substrate, a counter substrate that faces the thin film transistor substrate, a liquid crystal composition that is arranged between the thin film transistor substrate and the counter substrate, an oriented film that arranges orientation of the liquid crystal composition contacting with the thin film transistor substrate, a seal material that seals the liquid crystal composition between the two substrates, and a driver circuit. The driver circuit has a light transmission area that is formed inside of the driver circuit, and is higher in light transmittance than an area in which a non-transparent conductive film forming the driver circuit is formed, and a high sealing property area in which the seal material and an insulating film come into direct contact with each other between the light transmission area and an outer edge of the thin film transistor substrate.
    Type: Application
    Filed: May 3, 2016
    Publication date: August 25, 2016
    Inventors: Takahiro OCHIAI, Yuki KURAMOTO, Masahiro HOSHIBA
  • Patent number: 9372365
    Abstract: A liquid crystal display device is provided in which color unevenness can be reduced and inhibited in the peripheral display area even when the display device has a narrow frame. In the liquid crystal display device, liquid crystal sandwiched between a TFT substrate and a CF substrate and sealed by a seal is disposed in a frame portion. The CF substrate has a BM, a color resist film, an OC, an alignment film, and a wall that inhibits the alignment film from expanding outward. In the area where the wall is disposed, the BM and color resist film on the CF substrate are removed.
    Type: Grant
    Filed: August 6, 2014
    Date of Patent: June 21, 2016
    Assignee: JAPAN DISPLAY INC.
    Inventor: Yuki Kuramoto
  • Publication number: 20160161778
    Abstract: There is achieved a liquid crystal display device having a smaller picture frame region and a seal part of improved reliability. A liquid crystal display device includes a TFT substrate having a display region and a terminal region and formed with an organic passivation film, a counter substrate attached to the TFT substrate through a seal part, and a liquid crystal contained inside the seal part. A hole is formed at a predetermined pitch on the organic passivation film of the TFT substrate corresponding to the seal part when viewed on a plane. When the hole is viewed on a plane, a shortest distance from the hole to the hole is four micrometers or greater and 12 micrometers or less at a height of h1=0.9×h2 from a bottom face of the hole, where a depth of the hole is defined as h2.
    Type: Application
    Filed: December 3, 2015
    Publication date: June 9, 2016
    Inventors: Tomonori NISHINO, Masato SHIMURA, Tomokazu ISHIKAWA, Yuki KURAMOTO, Satoshi HASHIMOTO
  • Patent number: 9360716
    Abstract: A liquid crystal display device includes a thin film transistor substrate, a counter substrate that faces the thin film transistor substrate, a liquid crystal composition that is arranged between the thin film transistor substrate and the counter substrate, an oriented film that arranges orientation of the liquid crystal composition contacting with the thin film transistor substrate, a seal material that seals the liquid crystal composition between the two substrates, and a driver circuit. The driver circuit has a light transmission area that is formed inside of the driver circuit, and is higher in light transmittance than an area in which a non-transparent conductive film forming the driver circuit is formed, and a high sealing property area in which the seal material and an insulating film come into direct contact with each other between the light transmission area and an outer edge of the thin film transistor substrate.
    Type: Grant
    Filed: June 3, 2015
    Date of Patent: June 7, 2016
    Assignee: JAPAN DISPLAY INC.
    Inventors: Takahiro Ochiai, Yuki Kuramoto, Masahiro Hoshiba
  • Publication number: 20160147097
    Abstract: According to one embodiment, A display device includes a first substrate includes an inorganic insulating film, a first wiring formed above the inorganic insulating film, an organic insulating film located above the inorganic insulating film and the first wiring, and a driver electrically connected to the first wiring, a second substrate opposing the first substrate, and a sealant fixing the first substrate and the second substrate, wherein the sealant comprises a first seal portion formed along a first edge of the first substrate and a second seal portion which crosses the first seal portion, and the first seal portion has a first width, and the second seal portion has a second width, the first width being greater than the second width.
    Type: Application
    Filed: November 17, 2015
    Publication date: May 26, 2016
    Applicant: Japan Display Inc.
    Inventors: Taiki MAKINO, Tomokazu ISHIKAWA, Yuki KURAMOTO
  • Publication number: 20160103352
    Abstract: Red pixels (R), blue pixels (B) and green pixels (G) are formed in parallel. First columnar spacers 10 and second columnar spacers 20 are formed on a first substrate. The distance between the first substrate and a second substrate in a normal state is determined by the first columnar spacers 10. The diameter of a light blocking film corresponding to each first columnar spacer 10 is greater than the diameter of a light blocking film corresponding to each second columnar spacer 20. The first columnar spacer 10 is not formed at a boundary between a green pixel (G) and a red pixel (R) or a boundary between a green pixel (G) and a blue pixel (B). The second columnar spacer 20 is formed at a boundary between pixels irrespective of the pixel color. Thus, appropriate color balance can be attained with ease without having a drop in the luminance.
    Type: Application
    Filed: October 13, 2015
    Publication date: April 14, 2016
    Inventors: Saori SUGIYAMA, Takanori NAKAYAMA, Yuki KURAMOTO
  • Publication number: 20160041413
    Abstract: In order to avoid generation of black unevenness caused by the water intrusion into a liquid crystal display device, there is to provide a liquid crystal display device including a display area and a terminal portion, in which a TFT substrate with an organic passivation film formed and an opposite substrate are adhered to each other by a seal portion and a liquid crystal is enclosed there, wherein in the seal portion of the TFT substrate, a groove-shaped through-hole is formed in the organic passivation film to surround the display area, a water absorption layer formed of the same material in the same process as that of the organic passivation film is formed within the groove-shaped through-hole, and the water absorption layer is not covered with the inorganic insulating film.
    Type: Application
    Filed: August 4, 2015
    Publication date: February 11, 2016
    Inventors: Tomonori NISHINO, Masato Shimura, Tomokazu Ishikawa, Yuki Kuramoto, Satoshi Hashimoto
  • Publication number: 20160004114
    Abstract: The displacement between a TFT substrate and a counter substrate is prevented when an external pressing pressure is applied to a liquid crystal display device, and an alignment film is prevent from being shaved by a columnar spacer. A liquid crystal display device includes a first substrate having a recess and an upper part other than the recess, a second substrate having a first columnar spacer and a second columnar spacer, and a liquid crystal sandwiched between the substrates. The first columnar spacer contacts the upper part of the first substrate; the second columnar spacer is inserted into the recess of the first substrate, and a gap exists between a tip end portion of the second columnar spacer and a bottom part of the recess; and a height of the second columnar spacer is higher than a height of the first columnar spacer.
    Type: Application
    Filed: July 1, 2015
    Publication date: January 7, 2016
    Inventor: Yuki KURAMOTO
  • Publication number: 20150268523
    Abstract: A liquid crystal display device includes a thin film transistor substrate, a counter substrate that faces the thin film transistor substrate, a liquid crystal composition that is arranged between the thin film transistor substrate and the counter substrate, an oriented film that arranges orientation of the liquid crystal composition contacting with the thin film transistor substrate, a seal material that seals the liquid crystal composition between the two substrates, and a driver circuit. The driver circuit has a light transmission area that is formed inside of the driver circuit, and is higher in light transmittance than an area in which a non-transparent conductive film forming the driver circuit is formed, and a high sealing property area in which the seal material and an insulating film come into direct contact with each other between the light transmission area and an outer edge of the thin film transistor substrate.
    Type: Application
    Filed: June 3, 2015
    Publication date: September 24, 2015
    Inventors: Takahiro OCHIAI, Yuki Kuramoto, Masahiro Hoshiba