Patents by Inventor Keiichiro Ashizawa

Keiichiro Ashizawa 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: 20190317354
    Abstract: A liquid crystal display device with a pair of substrates which are arranged to face each other with liquid crystal therebetween, columnar spacers having the substantially equal height formed on a liquid-crystal-side surface of one substrate, and the columnar spacers include the columnar spacer which is contact with a liquid-crystal-side surface of another substrate and the columnar spacer which is not contact with the liquid-crystal-side surface of another substrate.
    Type: Application
    Filed: June 24, 2019
    Publication date: October 17, 2019
    Inventors: Keiichiro ASHIZAWA, Mitsuo NAKATANI, Hiroaki MIWA, Takao TANAKA, Sadafumi HIRAI, Shinichi KAWABE, Makoto SASAKI, Kazuyuki ITO, Masahiro IEDA
  • Patent number: 10371991
    Abstract: A liquid crystal display device with a pair of substrates which are arranged to face each other with liquid crystal therebetween, columnar spacers having the substantially equal height formed on a liquid-crystal-side surface of one substrate, and the columnar spacers include the columnar spacer which is contact with a liquid-crystal-side surface of another substrate and the columnar spacer which is not contact with the liquid-crystal-side surface of another substrate.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: August 6, 2019
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Keiichiro Ashizawa, Mitsuo Nakatani, Hiroaki Miwa, Takao Tanaka, Sadafumi Hirai, Shinichi Kawabe, Makoto Sasaki, Kazuyuki Ito, Masahiro Ieda
  • Publication number: 20180321537
    Abstract: A liquid crystal display device with a pair of substrates which are arranged to face each other with liquid crystal therebetween, columnar spacers having the substantially equal height formed on a liquid-crystal-side surface of one substrate, and the columnar spacers include the columnar spacer which is contact with a liquid-crystal-side surface of another substrate and the columnar spacer which is not contact with the liquid-crystal-side surface of another substrate.
    Type: Application
    Filed: July 18, 2018
    Publication date: November 8, 2018
    Inventors: Keiichiro ASHIZAWA, Mitsuo NAKATANI, Hiroaki MIWA, Takao TANAKA, Sadafumi HIRAI, Shinichi KAWABE, Makoto SASAKI, Kazuyuki ITO, Masahiro IEDA
  • Patent number: 10054826
    Abstract: A liquid crystal display device with a pair of substrates which are arranged to face each other with liquid crystal therebetween, columnar spacers having the substantially equal height formed on a liquid-crystal-side surface of one substrate, and the columnar spacers include the columnar spacer which is contact with a liquid-crystal-side surface of another substrate and the columnar spacer which is not contact with the liquid-crystal-side surface of another substrate.
    Type: Grant
    Filed: December 29, 2016
    Date of Patent: August 21, 2018
    Assignees: Japan Display Inc., Pansonic Liquid Crystal Display Co., Ltd.
    Inventors: Keiichiro Ashizawa, Mitsuo Nakatani, Hiroaki Miwa, Takao Tanaka, Sadafumi Hirai, Shinichi Kawabe, Makoto Sasaki, Kazuyuki Ito, Masahiro Ieda
  • Publication number: 20170108730
    Abstract: A liquid crystal display device with a pair of substrates which are arranged to face each other with liquid crystal therebetween, columnar spacers having the substantially equal height formed on a liquid-crystal-side surface of one substrate, and the columnar spacers include the columnar spacer which is contact with a liquid-crystal-side surface of another substrate and the columnar spacer which is not contact with the liquid-crystal-side surface of another substrate.
    Type: Application
    Filed: December 29, 2016
    Publication date: April 20, 2017
    Inventors: Keiichiro ASHIZAWA, Mitsuo NAKATANI, Hiroaki MIWA, Takao TANAKA, Sadafumi HIRAI, Shinichi KAWABE, Makoto SASAKI, Kazuyuki ITO, Masahiro IEDA
  • Patent number: 9575378
    Abstract: A liquid crystal display device with a pair of substrates which are arranged to face each other with liquid crystal therebetween, columnar spacers having the substantially equal height formed on a liquid-crystal-side surface of one substrate, and the columnar spacers include the columnar spacer which is contact with a liquid-crystal-side surface of another substrate and the columnar spacer which is not contact with the liquid-crystal-side surface of another substrate.
    Type: Grant
    Filed: May 21, 2015
    Date of Patent: February 21, 2017
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Keiichiro Ashizawa, Mitsuo Nakatani, Hiroaki Miwa, Takao Tanaka, Sadafumi Hirai, Shinichi Kawabe, Makoto Sasaki, Kazuyuki Ito, Masahiro Ieda
  • Publication number: 20150261031
    Abstract: A liquid crystal display device with a pair of substrates which are arranged to face each other with liquid crystal therebetween, columnar spacers having the substantially equal height formed on a liquid-crystal-side surface of one substrate, and the columnar spacers include the columnar spacer which is contact with a liquid-crystal-side surface of another substrate and the columnar spacer which is not contact with the liquid-crystal-side surface of another substrate.
    Type: Application
    Filed: May 21, 2015
    Publication date: September 17, 2015
    Inventors: Keiichiro ASHIZAWA, Mitsuo NAKATANI, Hiroaki MIWA, Takao TANAKA, Sadafumi HIRAI, Shinichi KAWABE, Makoto SASAKI, Kazuyuki ITO, Masahiro IEDA
  • Patent number: 9069213
    Abstract: A liquid crystal display device with a pair of substrates which are arranged to face each other with liquid crystal therebetween, columnar spacers having the substantially equal height formed on a liquid-crystal-side surface of one substrate, and the columnar spacers include the columnar spacer which is contact with a liquid-crystal-side surface of another substrate and the columnar spacer which is not contact with the liquid-crystal-side surface of another substrate.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: June 30, 2015
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Keiichiro Ashizawa, Mitsuo Nakatani, Hiroaki Miwa, Takao Tanaka, Sadafumi Hirai, Shinichi Kawabe, Makoto Sasaki, Kazuyuki Ito, Masahiro Ieda
  • Publication number: 20140211119
    Abstract: A liquid crystal display device with a pair of substrates which are arranged to face each other with liquid crystal therebetween, columnar spacers having the substantially equal height formed on a liquid-crystal-side surface of one substrate, and the columnar spacers include the columnar spacer which is contact with a liquid-crystal-side surface of another substrate and the columnar spacer which is not contact with the liquid-crystal-side surface of another substrate.
    Type: Application
    Filed: March 28, 2014
    Publication date: July 31, 2014
    Applicants: Panasonic Liquid Crystal Display Co., Ltd., Japan Display Inc.
    Inventors: Keiichiro ASHIZAWA, Mitsuo NAKATANI, Hiroaki MIWA, Takao TANAKA, Sadafumi HIRAI, Shinichi KAWABE, Makoto SASAKI, Kazuyuki ITO, Masahiro IEDA
  • Patent number: 8730443
    Abstract: A liquid crystal display device includes first and second substrates with a liquid crystal layer disposed therebetween, a display region and a peripheral region, a gate signal line and an image signal line, an insulating layer formed over the gate signal line and the image signal line, a pixel electrode formed in the display region, a counter electrode formed over the insulating layer and formed by a first transparent conductive layer, and a second transparent conductive layer and an external connection terminal. The second transparent conductive layer and the external connection terminal are disposed in the peripheral region, and the second transparent conductive layer is formed over the insulating layer and is electrically connected to the counter electrode and the external connection terminal. A part of the gate signal line is covered by the second transparent conductive layer in the peripheral region.
    Type: Grant
    Filed: March 29, 2013
    Date of Patent: May 20, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Masuyuki Ohta, Kazuhiro Ogawa, Keiichiro Ashizawa, Kazuhiko Yamagawa, Masahiro Yanai, Nobutake Konishi, Nobuyuki Suzuki, Masahiro Ishii, Makoto Yoneya, Sukekazu Aratani
  • Patent number: 8724072
    Abstract: A liquid crystal display device with a pair of substrates which are arranged to face each other with liquid crystal therebetween, columnar spacers having the substantially equal height formed on a liquid-crystal-side surface of one substrate, and the columnar spacers include the columnar spacer which is contact with a liquid-crystal-side surface of another substrate and the columnar spacer which is not contact with the liquid-crystal-side surface of another substrate.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: May 13, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Keiichiro Ashizawa, Mitsuo Nakatani, Hiroaki Miwa, Takao Tanaka, Sadafumi Hirai, Shinichi Kawabe, Makoto Sasaki, Kazuyuki Ito, Masahiro Ieda
  • Patent number: 8704988
    Abstract: A liquid crystal display device includes a first substrate, a pixel electrode and a counter electrode, an insulation film, and a first orientation film formed over the pixel electrode and the counter electrode on the first substrate, the first orientation film being responsive to a radiated polarized light to obtain an initial orientation direction. A second substrate is opposed to the first substrate, a second orientation film is formed over the second substrate, and a liquid crystal is sealed between the first and second substrates. The first and second orientation films are made of polyimide, the liquid crystal has negative dielectric anisotropy, and the liquid crystal display device is normally in a black mode. An angle formed between the electric field and the initial orientation direction of the first orientation film is in a range of greater than 0° to 45°.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: April 22, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann
  • Publication number: 20130194534
    Abstract: A liquid crystal display device includes a first substrate, a pixel electrode and a counter electrode, an insulation film, and a first orientation film formed over the pixel electrode and the counter electrode on the first substrate, the first orientation film being responsive to a radiated polarized light to obtain an initial orientation direction. A second substrate is opposed to the first substrate, a second orientation film is formed over the second substrate, and a liquid crystal is sealed between the first and second substrates. The first and second orientation films are made of polyimide, the liquid crystal has negative dielectric anisotropy, and the liquid crystal display device is normally in a black mode. An angle formed between the electric field and the initial orientation direction of the first orientation film is in a range of greater than 0° to 45°.
    Type: Application
    Filed: March 5, 2013
    Publication date: August 1, 2013
    Applicants: Panasonic Liquid Crystal Display Co., Ltd., Hitachi Displays, Ltd.
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann
  • Publication number: 20130162928
    Abstract: A liquid crystal display device with a pair of substrates which are arranged to face each other with liquid crystal therebetween, columnar spacers having the substantially equal height formed on a liquid-crystal-side surface of one substrate, and the columnar spacers include the columnar spacer which is contact with a liquid-crystal-side surface of another substrate and the columnar spacer which is not contact with the liquid-crystal-side surface of another substrate.
    Type: Application
    Filed: February 20, 2013
    Publication date: June 27, 2013
    Applicants: Panasonic Liquid Crystal Display Co., Ltd., Hitachi Displays, Ltd.
    Inventors: Keiichiro ASHIZAWA, Mitsuo NAKATANI, Hiroaki MIWA, Takao TANAKA, Sadafumi HIRAI, Shinichi KAWABE, Makoto SASAKI, Kazuyuki ITO, Masahiro IEDA
  • Patent number: 8427613
    Abstract: A liquid crystal display device includes a first substrate, a second substrate, a liquid crystal layer sandwiched between the first and second substrates, and an orientation film formed on the first substrate. The orientation film has two orientation regions in a pixel, and the orientation regions are formed by polarized light.
    Type: Grant
    Filed: June 3, 2011
    Date of Patent: April 23, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann
  • Patent number: 8405813
    Abstract: A liquid crystal display device with a pair of substrates which are arranged to face each other with liquid crystal therebetween, columnar spacers having the substantially equal height formed on a liquid-crystal-side surface of one substrate, and the columnar spacers include the columnar spacer which is contact with a liquid-crystal-side surface of another substrate and the columnar spacer which is not contact with the liquid-crystal-side surface of another substrate.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: March 26, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Keiichiro Ashizawa, Mitsuo Nakatani, Hiroaki Miwa, Takao Tanaka, Sadafumi Hirai, Shinichi Kawabe, Makoto Sasaki, Kazuyuki Ito, Masahiro Ieda
  • Patent number: 8358394
    Abstract: A liquid crystal display device includes first and second substrates, a liquid crystal layer disposed therebetween, pixel regions formed by gate signal lines and image signal lines formed over the first substrate, a first insulating layer formed over the gate signal lines, thin film transistors connected to the gate signal lines with in a second insulating layer formed thereover, pixel electrodes connected to the thin film transistors, a counter electrode formed of a first transparent conductive layer over the second insulating layer, and a second transparent conductive layer and an external connection terminal disposed outside of the pixel regions. The second transparent conductive layer is formed over the second insulating layer and is electrically connected to the counter electrode and the external connection terminal, and a part of each of the gate signal lines is disposed outside of the pixel regions and is covered by the second transparent conductive layer.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: January 22, 2013
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Masuyuki Ohta, Kazuhiro Ogawa, Keiichiro Ashizawa, Kazuhiko Yanagawa, Masahiro Yanai, Nobutake Konishi, Nobuyuki Suzuki, Masahiro Ishii, Makoto Yoneya, Sukekazu Aratani
  • Publication number: 20120293761
    Abstract: A liquid crystal display device includes first and second substrates, a liquid crystal layer disposed therebetween, pixel regions formed by gate signal lines and image signal lines formed over the first substrate, a first insulating layer formed over the gate signal lines, thin film transistors connected to the gate signal lines with in a second insulating layer formed thereover, pixel electrodes connected to the thin film transistors, a counter electrode formed of a first transparent conductive layer over the second insulating layer, and a second transparent conductive layer and an external connection terminal disposed outside of the pixel regions. The second transparent conductive layer is formed over the second insulating layer and is electrically connected to the counter electrode and the external connection terminal, and a part of each of the gate signal lines is disposed outside of the pixel regions and is covered by the second transparent conductive layer.
    Type: Application
    Filed: July 27, 2012
    Publication date: November 22, 2012
    Inventors: Masuyuki Ohta, Kazuhiro Ogawa, Keiichiro Ashizawa, Kazuhiko Yanagawa, Masahiro Yanai, Nobutake Konishi, Nobuyuki Suzuki, Masahiro Ishii, Makoto Yoneya, Sukekazu Aratani
  • Patent number: 8233126
    Abstract: An active matrix type liquid crystal display device includes first and second substrates, a liquid crystal layer disposed between the first and second substrates, a plurality of pixel regions formed by image signal lines and scan signal lines, and a semiconductor layer, a pixel electrode, a counter electrode formed on the first substrate in a pixel region. The pixel electrode is arranged at level which is lower than a level of the semiconductor layer.
    Type: Grant
    Filed: August 10, 2011
    Date of Patent: July 31, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Masuyuki Ohta, Kazuhiro Ogawa, Keiichiro Ashizawa, Kazuhiko Yanagawa, Masahiro Yanai, Nobutake Konishi, Nobuyuki Suzuki, Masahiro Ishii, Makoto Yoneya, Sukekazu Aratani
  • Patent number: 8154698
    Abstract: A liquid crystal display device includes a first substrate, a second substrate, a first electrode and a second electrode formed on the first substrate, the second electrode being arranged at an upper layer with respect to the first electrode, a drain signal line and a gate signal line formed on the first substrate, and a liquid crystal layer driven by an electric field formed between the first electrode and the second electrode. The first electrode extends in parallel to the drain signal line and the second electrode extends at a slanted direction to the drain signal line.
    Type: Grant
    Filed: June 3, 2011
    Date of Patent: April 10, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann