Patents by Inventor Chikae Matsui

Chikae Matsui 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: 20200019021
    Abstract: A liquid crystal display device includes a first substrate, a first alignment film formed over the first substrate, a second substrate, a second alignment film formed over the second substrate, a liquid crystal layer sandwiched between the first alignment film and the second alignment film, and a projecting portion formed over the second substrate. The first alignment film is a photo alignment film, and thickness “d2” of the second alignment film over the projecting portion and a film thickness “d1” of a portion of the first alignment film facing the projecting portion satisfy formula (2), d2<d1 ??(2).
    Type: Application
    Filed: September 24, 2019
    Publication date: January 16, 2020
    Inventors: Hidehiro SONODA, Chikae MATSUI, Noboru KUNIMATSU
  • Patent number: 10534225
    Abstract: A liquid crystal display device includes a TFT substrate having a first alignment film and an opposing substrate having a second alignment film with liquid crystals sandwiched therebetween. One of the first and second alignment films, comprises a first polyimide produced via polyamide acid ester containing cyclobutane as a precursor and a second polyimide produced via polyamide acid as a precursor. The polyamide acid has a higher polarity than that of the polyamide acid ester. The one of the first and second alignment films is responsive to photo-alignment. A first side of the one of the first and second alignment films is adjacent to the liquid crystals, and a second side thereof is closer to one of the TFT substrate and the counter substrate than the first side. The first side contains more of the first polyimide and less of the second polyimide than the second side.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: January 14, 2020
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Noboru Kunimatsu, Chikae Matsui, Hidehiro Sonoda, Yuko Matsumoto, Shoichi Uchino, Masaki Matsumori, Yasushi Tomioka
  • Patent number: 10481437
    Abstract: A liquid crystal display device includes a first substrate, a first alignment film formed over the first substrate, a second substrate, a second alignment film formed aver the second substrate, a liquid crystal layer sandwiched between the first alignment film and the second alignment film, and a projecting portion formed over the second substrate. The first alignment film is a photo alignment film, and a thickness “d2” of the second alignment film over the projecting portion and a film thickness “d1” of a portion of the first alignment film facing the projecting portion satisfy formula (2), d2<d1??(2).
    Type: Grant
    Filed: July 15, 2019
    Date of Patent: November 19, 2019
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hidehiro Sonoda, Chikae Matsui, Noboru Kunimatsu
  • Patent number: 10481442
    Abstract: A liquid crystal display device includes a TFT substrate and a counter substrate and a liquid crystal layer sandwiched therebetween. A scanning line, a video signal line, a thin film transistor connected to the scanning line and the video signal line, a pixel electrode connected to the thin film transistor, and a counter electrode are formed on the TFT substrate, and a columnar spacer formed on the counter substrate. The pixel and counter electrodes are transparent, and the liquid crystal layer is controlled by an electric field generated between the pixel and counter electrodes. The counter electrode contacts with a metal line having a first part which is extended in parallel with the scanning line and a second part which is extended in parallel with the video signal line, a width of the first part of the metal line being narrower than a width of the scanning line.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: November 19, 2019
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hidehiro Sonoda, Chikae Matsui, Noboru Kunimatsu
  • Publication number: 20190339575
    Abstract: A liquid crystal display device includes a first substrate, a first alignment film formed over the first substrate, a second substrate, a second alignment film formed over the second substrate, a liquid crystal layer sandwiched between the first alignment film and the second alignment film, and a projecting portion formed over the second substrate. The first alignment film is a photo alignment film, and a thickness “d2” of the second alignment film over the projecting portion and a film thickness “d1” of a portion of the first alignment film facing the projecting portion satisfy formula (2), d2<d1??(2).
    Type: Application
    Filed: July 15, 2019
    Publication date: November 7, 2019
    Inventors: Hidehiro SONODA, Chikae MATSUI, Noboru KUNIMATSU
  • Patent number: 10401687
    Abstract: A liquid crystal display device includes a first substrate, a first alignment film formed over the first substrate, a second substrate, a second alignment film formed over the second substrate, a liquid crystal layer sandwiched between the first alignment film and the second alignment film, and a projecting portion formed over the second substrate. The first alignment film is a photo alignment film, and a thickness “d2” of the second alignment film over the projecting portion and a film thickness “d1” of a portion of the first alignment film facing the projecting portion satisfy formula (2), d2<d1??(2).
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: September 3, 2019
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hidehiro Sonoda, Chikae Matsui, Noboru Kunimatsu
  • Publication number: 20190179203
    Abstract: Disclosed is a manufacturing method of a liquid crystal display device which is a manufacturing method of a liquid crystal display device including a liquid crystal alignment film to which an alignment regulating force is imparted by a photo-alignment treatment, including: a film forming step of forming a film containing a polymer whose main chain is cleaved by irradiation with light; a photo-alignment step of imparting an alignment regulating force to the film formed in the film forming step by irradiation of the film with light in an atmosphere of a temperature lower than 100° C.; and a removing step of removing a low-molecular weight component generated by cleaving the main chain of the polymer through the light irradiation after the light irradiation. Also disclosed is a liquid crystal display device manufactured by the manufacturing method.
    Type: Application
    Filed: February 15, 2019
    Publication date: June 13, 2019
    Inventors: Shoichi Uchino, Noboru Kunimatsu, Hidehiro Sonoda, Chikae Matsui, Yuko Matsumoto, Tomio Yaguchi, Toshiki Kaneko, Jun Tanaka
  • Publication number: 20190121188
    Abstract: A liquid crystal display device includes a TFT substrate and a counter substrate and a liquid crystal layer sandwiched therebetween. A scanning line, a video signal line, a thin film transistor connected to the scanning line and the video signal line, a pixel electrode connected to the thin film transistor, and a counter electrode are formed on the TFT substrate, and a columnar spacer formed on the counter substrate. The pixel and counter electrodes are transparent, and the liquid crystal layer is controlled by an electric field generated between the pixel and counter electrodes. The counter electrode contacts with a metal line having a first part which is extended in parallel with the scanning line and a second part which is extended in parallel with the video signal line a width of the first part of the metal line being narrower than a width of the scanning line.
    Type: Application
    Filed: December 18, 2018
    Publication date: April 25, 2019
    Inventors: Hidehiro SONODA, Chikae MATSUI, Noboru KUNIMATSU
  • Publication number: 20190121203
    Abstract: A liquid crystal display device includes a first substrate, a first alignment film formed over the first substrate, a second substrate, a second alignment film formed over the second substrate, a liquid crystal layer sandwiched between the first alignment film and the second alignment film, and a projecting portion formed over the second substrate. The first alignment film is a photo alignment film, and a thickness “d2” of the second alignment film over the projecting portion and a film thickness “d1” of a portion of the first alignment film facing the projecting portion satisfy formula (2), d2<d1??(2).
    Type: Application
    Filed: December 20, 2018
    Publication date: April 25, 2019
    Inventors: Hidehiro SONODA, Chikae MATSUI, Noboru KUNIMATSU
  • Patent number: 10268081
    Abstract: Disclosed is a manufacturing method of a liquid crystal display device which is a manufacturing method of a liquid crystal display device including a liquid crystal alignment film to which an alignment regulating force is imparted by a photo-alignment treatment, including: a film forming step of forming a film containing a polymer whose main chain is cleaved by irradiation with light; a photo-alignment step of imparting an alignment regulating force to the film formed in the film forming step by irradiation of the film with light in an atmosphere of a temperature lower than 100° C.; and a removing step of removing a low-molecular weight component generated by cleaving the main chain of the polymer through the light irradiation after the light irradiation. Also disclosed is a liquid crystal display device manufactured by the manufacturing method.
    Type: Grant
    Filed: April 7, 2014
    Date of Patent: April 23, 2019
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display, Co., Ltd.
    Inventors: Shoichi Uchino, Noboru Kunimatsu, Hidehiro Sonoda, Chikae Matsui, Yuko Matsumoto, Tomio Yaguchi, Toshiki Kaneko, Jun Tanaka
  • Publication number: 20190094628
    Abstract: An alignment film is given a 2-layer structure comprising a photoalignment film that is photoalignable and a low-resistivity alignment film whose resistivity is smaller than that of the photoalignment film. The photoalignment film is formed by a polyimide whose precursor is polyamide acid alkyl ester, the number molecular weight of the photoalignment film is large, and the stability of alignment of the photoalignment film by photoalignment is excellent. The low-resistivity alignment film is formed by a polyimide whose precursor is polyamide acid, the number molecular weight of the low-resistivity alignment film is small, and the resistivity of the low-resistivity alignment film is small. The 2-layer structure alignment film can be maintaining an excellent photoalignment characteristic, so DC afterimages can be controlled.
    Type: Application
    Filed: November 26, 2018
    Publication date: March 28, 2019
    Inventors: Chikae Matsui, Noboru Kunimatsu, Hidehiro Sonoda
  • Patent number: 10197860
    Abstract: A liquid crystal display device includes a first substrate, a first alignment film formed over the first substrate, a second substrate, a second alignment film formed over the second substrate, a liquid crystal layer sandwiched between the first alignment film and the second alignment film, and a projecting portion formed over the second substrate. The first alignment film is a photo alignment film, and a thickness “d2” of the second alignment film over the projecting portion and a film thickness “d1” of a portion of the first alignment film facing the projecting portion satisfy formula (2), d2<d1??(2).
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: February 5, 2019
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hidehiro Sonoda, Chikae Matsui, Noboru Kunimatsu
  • Patent number: 10185183
    Abstract: A liquid crystal display device includes a TFT substrate and a counter substrate and a liquid crystal layer sandwiched therebetween. A scanning line, a video signal line, a thin film transistor connected to the scanning line and the video signal line, a pixel electrode connected to the thin film transistor, and a counter electrode are formed on the TFT substrate, and a columnar spacer formed on the counter substrate. The pixel and counter electrodes are transparent, and the liquid crystal layer is controlled by an electric field generated between the pixel and counter electrodes. The counter electrode contacts with a metal line having a first part which is extended in parallel with the scanning line and a second part which is extended in parallel with the video signal line, a width of the first part of the metal line being narrower than a width of the scanning line.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: January 22, 2019
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hidehiro Sonoda, Chikae Matsui, Noboru Kunimatsu
  • Patent number: 10168579
    Abstract: An alignment film is given a 2-layer structure comprising a photoalignment film that is photoalignable and a low-resistivity alignment film whose resistivity is smaller than that of the photoalignment film. The photoalignment film is formed by a polyimide whose precursor is polyamide acid alkyl ester, the number molecular weight of the photoalignment film is large, and the stability of alignment of the photoalignment film by photoalignment is excellent. The low-resistivity alignment film is formed by a polyimide whose precursor is polyamide acid, the number molecular weight of the low-resistivity alignment film is small, and the resistivity of the low-resistivity alignment film is small. The 2-layer structure alignment film can be maintaining an excellent photoalignment characteristic, so DC afterimages can be controlled.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: January 1, 2019
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Chikae Matsui, Noboru Kunimatsu, Hidehiro Sonoda
  • Publication number: 20180180947
    Abstract: The present invention provides a liquid crystal display device in which even in the case of using a photo-alignment technique, excellent afterimage characteristics can be stably obtained. Provided is a liquid crystal display device including a TFT substrate having an alignment film, an opposed substrate which is arranged to face the TFT substrate and on which an alignment film is formed, and a liquid crystal layer sandwiched between the alignment films, wherein the alignment films are materials that can provide a liquid crystal alignment restraining force by irradiating polarized light, and the ratio of oxygen atoms on the surface of the alignment film is higher than that in the alignment film.
    Type: Application
    Filed: February 12, 2018
    Publication date: June 28, 2018
    Inventors: Yasuo IMANISHI, Yosuke Hyodo, Chikae Matsui, Hidehiro Sonoda, Noboru Kunimatsu
  • Patent number: 9927660
    Abstract: The present invention provides a liquid crystal display device in which even in the case of using a photo-alignment technique, excellent afterimage characteristics can be stably obtained. Provided is a liquid crystal display device including a TFT substrate having an alignment film, an opposed substrate which is arranged to face the TFT substrate and on which an alignment film is formed, and a liquid crystal layer sandwiched between the alignment films, wherein the alignment films are materials that can provide a liquid crystal alignment restraining force by irradiating polarized light, and the ratio of oxygen atoms on the surface of the alignment film is higher than that in the alignment film.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: March 27, 2018
    Assignee: Japan Display Inc.
    Inventors: Yasuo Imanishi, Yosuke Hyodo, Chikae Matsui, Hidehiro Sonoda, Noboru Kunimatsu
  • Publication number: 20180039140
    Abstract: A liquid crystal display device includes a first substrate, a first alignment film formed over the first substrate, a second substrate, a second alignment film formed over the second substrate, a liquid crystal layer sandwiched between the first alignment film and the second alignment film, and a projecting portion formed over the second substrate. The first alignment film is a photo alignment film, and a thickness “d2” of the second alignment film over the projecting portion and a film thickness “d1” of a portion of the first alignment film facing the projecting portion satisfy formula (2), d2<d1 ??(2).
    Type: Application
    Filed: September 29, 2017
    Publication date: February 8, 2018
    Inventors: Hidehiro Sonoda, Chikae Matsui, Noboru Kunimatsu
  • Publication number: 20170363914
    Abstract: A liquid crystal display device includes a TFT substrate having a first alignment film and an opposing substrate having a second alignment film with liquid crystals sandwiched therebetween. One of the first and second alignment films, comprises a first polyimide produced via polyamide acid ester containing cyclobutane as a precursor and a second polyimide produced via polyamide acid as a precursor. The polyamide acid has a higher polarity than that of the polyamide acid ester. The one of the first and second alignment films is responsive to photo-alignment. A first side of the one of the first and second alignment films is adjacent to the liquid crystals, and a second side thereof is closer to one of the TFT substrate and the counter substrate than the first side. The first side contains more of the first polyimide and less of the second polyimide than the second side.
    Type: Application
    Filed: September 6, 2017
    Publication date: December 21, 2017
    Inventors: Noboru KUNIMATSU, Chikae MATSUI, Hidehiro SONODA, Yuko MATSUMOTO, Shoichi UCHINO, Masaki MATSUMORI, Yasushi TOMIOKA
  • Patent number: 9804445
    Abstract: A liquid crystal display device includes a first substrate, a first alignment film formed over the first substrate, a second substrate, a second alignment film formed over the second substrate, a liquid crystal layer sandwiched between the first alignment film and the second alignment film, and a projecting portion formed over the second substrate. The first alignment film is a photo alignment film, and a thickness “d2” of the second alignment film over the projecting portion and a film thickness “d1” of a portion of the first alignment film facing the projecting portion satisfy formula (1) and (2): 0 nm<d2<30 nm??(1); d2<d1??(2).
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: October 31, 2017
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hidehiro Sonoda, Chikae Matsui, Noboru Kunimatsu
  • Patent number: 9785013
    Abstract: A liquid crystal display device includes a TFT substrate having a first alignment film and an opposing substrate having a second alignment film with liquid crystals sandwiched therebetween. One of the first and second alignment films, comprises a first polyimide produced via polyamide acid ester containing cyclobutane as a precursor and a second polyimide produced via polyamide acid as a precursor. The polyamide acid has a higher polarity than that of the polyamide acid ester. The one of the first and second alignment films is responsive to photo-alignment. A first side of the one of the first and second alignment films is adjacent to the liquid crystals, and a second side thereof is closer to one of the TFT substrate and the counter substrate than the first side. The first side contains more of the first polyimide and less of the second polyimide than the second side.
    Type: Grant
    Filed: September 23, 2015
    Date of Patent: October 10, 2017
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Noboru Kunimatsu, Chikae Matsui, Hidehiro Sonoda, Yuko Matsumoto, Shoichi Uchino, Masaki Matsumori, Yasushi Tomioka