Patents by Inventor Kiyomi Kawada

Kiyomi Kawada 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: 8049848
    Abstract: A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.
    Type: Grant
    Filed: September 23, 2009
    Date of Patent: November 1, 2011
    Assignee: NEC Corporation
    Inventors: Ken-ichi Takatori, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroshi Kanoh, Ken Sumiyoshi, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai
  • Publication number: 20100066964
    Abstract: A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.
    Type: Application
    Filed: September 23, 2009
    Publication date: March 18, 2010
    Inventors: Ken-Ichi Takatori, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroshi Kanoh, Ken Sumiyoshi, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai
  • Patent number: 7612848
    Abstract: A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.
    Type: Grant
    Filed: March 28, 2007
    Date of Patent: November 3, 2009
    Assignee: NEC Corporation
    Inventors: Ken-ichi Takatori, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroshi Kanoh, Ken Sumiyoshi, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai
  • Publication number: 20070165172
    Abstract: A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.
    Type: Application
    Filed: March 28, 2007
    Publication date: July 19, 2007
    Inventors: Ken-Ichi Takatori, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroshi Kanoh, Ken Sumiyoshi, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai
  • Patent number: 7245343
    Abstract: To provide a liquid crystal device a liquid crystal display having a high contrast over wide viewing angles while reducing the color distortion. A liquid crystal display device comprises a first substrate on which a plurality of pixel electrodes are formed, a second substrate on which an opposing electrode is formed, and a liquid crystal layer sandwiched between the first and second substrates, the second substrate further having thereon a plurality of protrusions, each of the protrusions being positioned at a substantially central portion of a corresponding one of the pixel electrodes.
    Type: Grant
    Filed: December 14, 2001
    Date of Patent: July 17, 2007
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Masayoshi Suzuki, Toshiya Ishii, Seiji Suzuki, Hiroaki Matsuyama, Kiyomi Kawada, Yoshihiko Hirai
  • Patent number: 7212270
    Abstract: A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.
    Type: Grant
    Filed: September 23, 2004
    Date of Patent: May 1, 2007
    Assignee: NEC Corporation
    Inventors: Ken-Ichi Takatori, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroshi Kanoh, Ken Sumiyoshi, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai
  • Patent number: 6927822
    Abstract: In an orientation division type liquid crystal display device for widen a viewing angle of a display pixel of an active matrix type liquid crystal color display device having a COT structure, pixel color layers (6B, 6R, 6G) as color filters and pixel electrodes 3 are formed on a substrate on the side of the pixel electrodes and slopes 13 are provided along four side peripheries of each pixel electrode. Liquid crystal molecules 8 between each pixel electrode of the pixel electrode substrate and a common electrode of an opposing substrate are controlled in orientation direction along the slopes to divide it to a plurality of directions to thereby widen a viewing angle of a pixel display.
    Type: Grant
    Filed: June 2, 2004
    Date of Patent: August 9, 2005
    Assignee: NEC LCD Technologies
    Inventors: Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Toshiya Ishii, Teruaki Suzuki, Ken Sumiyoshi, Masayoshi Suzuki
  • Publication number: 20050036096
    Abstract: A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.
    Type: Application
    Filed: September 23, 2004
    Publication date: February 17, 2005
    Applicant: NEC CORPORATION
    Inventors: Ken-Ichi Takatori, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroshi Kanoh, Ken Sumiyoshi, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai
  • Publication number: 20040218128
    Abstract: In an orientation division type liquid crystal display device for widen a viewing angle of a display pixel of an active matrix type liquid crystal color display device having a COT structure, pixel color layers (6B, 6R, 6G) as color filters and pixel electrodes 3 are formed on a substrate on the side of the pixel electrodes and slopes 13 are provided along four side peripheries of each pixel electrode. Liquid crystal molecules 8 between each pixel electrode of the pixel electrode substrate and a common electrode of an opposing substrate are controlled in orientation direction along the slopes to divide it to a plurality of directions to thereby widen a viewing angle of a pixel display.
    Type: Application
    Filed: June 2, 2004
    Publication date: November 4, 2004
    Applicant: NEC LCD Technologies, Ltd.
    Inventors: Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Toshiya Ishii, Teruaki Suzuki, Ken Sumiyoshi, Masayoshi Suzuki
  • Patent number: 6812986
    Abstract: A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.
    Type: Grant
    Filed: September 23, 2002
    Date of Patent: November 2, 2004
    Assignee: NEC Corporation
    Inventors: Ken-Ichi Takatori, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroshi Kanoh, Ken Sumiyoshi, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai
  • Patent number: 6768530
    Abstract: In an orientation division type liquid crystal display device for widen a viewing angle of a display pixel of an active matrix type liquid crystal color display device having a COT structure, pixel color layers (6B, 6R, 6G) as color filters and pixel electrodes 3 are formed on a substrate on the side of the pixel electrodes and slopes 13 are provided along four side peripheries of each pixel electrode. Liquid crystal molecules 8 between each pixel electrode of the pixel electrode substrate and a common electrode of an opposing substrate are controlled in orientation direction along the slopes to divide it to a plurality of directions to thereby widen a viewing angle of a pixel display.
    Type: Grant
    Filed: December 20, 2000
    Date of Patent: July 27, 2004
    Assignee: NEC Corporation
    Inventors: Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Toshiya Ishii, Teruaki Suzuki, Ken Sumiyoshi, Masayoshi Suzuki
  • Patent number: 6750934
    Abstract: A VA (Vertical Aligned) type active-matrix liquid crystal display capable of stabilizing a boundary position between divided areas (alignment areas). The liquid crystal display comprises a TFT (thin film transistor) substrate including a pixel electrode provided for each pixel and a driving element such as a TFT provided for each pixel electrode, an opposite substrate disposed opposite to the TFT substrate and including an opposite electrode, and a liquid crystal layer sandwiched between the TFT substrate and the opposite substrate. Each pixel electrode has a recess in groove shape formed therein. The pixel electrode preferably has a generally rectangular shape. The recess is provided such that it extends from one of a pair of opposite sides of the pixel electrode to the other to divide the pixel electrode into two parts.
    Type: Grant
    Filed: December 18, 2000
    Date of Patent: June 15, 2004
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Michiaki Sakamoto, Yuji Yamamoto, Mamoru Okamoto, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai
  • Patent number: 6650390
    Abstract: A liquid crystal display panel comprises a TFT substrate unit having a thin film transistor (TFT), a control electrode connected to the TFT, a flattening film covering the control electrode, and a pixel electrode having a cross slit and formed on the flattening film and insulated from the control electrode. An opposite substrate unit has an opposite electrode facing the pixel electrode at a predetermined position. A liquid crystal layer disposed between the TFT substrate unit and the opposite substrate includes liquid crystal molecules having negative dielectric aeolotropy. When voltage is supplied between the control electrode and the opposite electrode, an electric field is generated between them. The electric field divides the liquid crystal layer into four domains in each pixel according to the cross slit formed in the pixel electrode.
    Type: Grant
    Filed: March 2, 2001
    Date of Patent: November 18, 2003
    Assignee: NEC LCD Technologies, Inc.
    Inventors: Michiaki Sakamoto, Teruaki Suzuki, Mamoru Okamoto, Masayoshi Suzuki, Toshiya Ishii, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai, Yuji Yamamoto
  • Publication number: 20030025865
    Abstract: A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.
    Type: Application
    Filed: September 23, 2002
    Publication date: February 6, 2003
    Inventors: Ken-Ichi Takatori, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroshi Kanoh, Ken Sumiyoshi, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai
  • Publication number: 20030016325
    Abstract: A polarizer and a ¼ wavelength plate are bonded to each of first and second substrates of a liquid crystal panel that includes a liquid crystal layer having a bend alignment such that an angle between an optical axis of the ¼ wavelength plate and a transmission axis of the polarizer is made 45° relative to each other to make circularly polarized lights outputted respectively from the ¼ wavelength plate and the polarizer each have a polarity opposite each other. In this case, since a light inputted to a liquid crystal display device is converted into a circularly polarized light before entering a liquid crystal layer, the maximum value of an intensity of the light exited from the device becomes constant regardless of the orientation of the optical axis of the liquid crystal layer 101.
    Type: Application
    Filed: July 19, 2002
    Publication date: January 23, 2003
    Applicant: NEC Corporation
    Inventors: Takayuki Konno, Masayoshi Suzuki, Toshiya Ishii, Kiyomi Kawada, Hiroaki Matsuyama, Yoshihiko Hirai
  • Patent number: 6504592
    Abstract: A liquid crystal display having a wide viewing angle and easily manufactured. The liquid crystal display comprises an upper substrate and a lower substrate, and a liquid crystal material disposed between the upper substrate and the lower substrate. The liquid crystal display has a conductive protrusion disposed on the surface of the upper substrate opposing to the lower substrate. The conductive protrusion is disposed over a scanning electrode line or a signal electrode line and has the same potential as that of the upper electrode. As another structure, each of pixel electrodes on the lower substrate has a smaller area than that of a common electrode on the upper substrate and is covered by the common electrode, and each of the pixel electrodes comprises an electrode portion having approximately symmetrical shape.
    Type: Grant
    Filed: June 13, 2000
    Date of Patent: January 7, 2003
    Assignee: NEC Corporation
    Inventors: Ken-Ichi Takatori, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroshi Kanoh, Ken Sumiyoshi, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai
  • Publication number: 20020080320
    Abstract: To provide a liquid crystal device a liquid crystal display having a high contrast over wide viewing angles while reducing the color distortion.
    Type: Application
    Filed: December 14, 2001
    Publication date: June 27, 2002
    Inventors: Masayoshi Suzuki, Toshiya Ishii, Seiji Suzuki, Hiroaki Matsuyama, Kiyomi Kawada, Yoshihiko Hirai
  • Publication number: 20010019392
    Abstract: A liquid crystal display panel comprises a TFT substrate unit having a thin film transistor (TFT), a control electrode connected to the TFT, a flattening film covers the control electrode, and a pixel electrode having a cross slit and formed on the flattening film and insulated from the control electrode. An opposite substrate unit has an opposite electrode facing the pixel electrode at predetermined space. A liquid crystal layer disposed between the TFT substrate unit and the opposite substrate and includes liquid crystal molecules having negative dielectric aeolotropy. When voltage is supplied between the control electrode and the opposite electrode, an electric field is generated between them. The electric field divides the liquid crystal layer into four domains in each pixel according to the cross slit formed in the pixel electrode.
    Type: Application
    Filed: March 2, 2001
    Publication date: September 6, 2001
    Applicant: NEC CORPORATION
    Inventors: Michiaki Sakamoto, Teruaki Suzuki, Mamoru Okamoto, Masayoshi Suzuki, Toshiya Ishii, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai, Yuji Yamamoto
  • Publication number: 20010006408
    Abstract: In an orientation division type liquid crystal display device for widen a viewing angle of a display pixel of an active matrix type liquid crystal color display device having a COT structure, pixel color layers (6B, 6R, 6G) as color filters and pixel electrodes 3 are formed on a substrate on the side of the pixel electrodes and slopes 13 are provided along four side peripheries of each pixel electrode. Liquid crystal molecules 8 between each pixel electrode of the pixel electrode substrate and a common electrode of an opposing substrate are controlled in orientation direction along the slopes to divide it to a plurality of directions to thereby widen a viewing angle of a pixel display.
    Type: Application
    Filed: December 20, 2000
    Publication date: July 5, 2001
    Inventors: Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai, Michiaki Sakamoto, Mamoru Okamoto, Yuji Yamamoto, Toshiya Ishii, Teruaki Suzuki, Ken Sumiyoshi, Masayoshi Suzuki
  • Publication number: 20010004274
    Abstract: A VA (Vertical Aligned) type active-matrix liquid crystal display capable of stabilizing a boundary position between divided areas (alignment areas). The liquid crystal display comprises a TFT (thin film transistor) substrate including a pixel electrode provided for each pixel and a driving element such as a TFT provided for each pixel electrode, an opposite substrate disposed opposite to the TFT substrate and including an opposite electrode, and a liquid crystal layer sandwiched between the TFT substrate and the opposite substrate. Each pixel electrode has a recess in groove shape formed therein. The pixel electrode preferably has a generally rectangular shape. The recess is provided such that it extends from one of a pair of opposite sides of the pixel electrode to the other to divide the pixel electrode into two parts.
    Type: Application
    Filed: December 18, 2000
    Publication date: June 21, 2001
    Applicant: NEC Corporation
    Inventors: Michiaki Sakamoto, Yuji Yamamoto, Mamoru Okamoto, Masayoshi Suzuki, Toshiya Ishii, Teruaki Suzuki, Hiroaki Matsuyama, Kiyomi Kawada, Seiji Suzuki, Yoshihiko Hirai