Patents by Inventor Katsuhiko Yarita

Katsuhiko Yarita 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).

  • Display device
    Publication number: 20030058205
    Abstract: Let a drive circuit chip shrink in outer shape size to thereby enable miniaturization of a display device as a whole.
    Type: Application
    Filed: August 29, 2002
    Publication date: March 27, 2003
    Applicant: Hitachi, Ltd.
    Inventors: Katsuhiko Yarita, Hiroyuki Takahashi
  • TFT active matrix liquid crystal display devices
    Publication number: 20020080295
    Abstract: There are disclosed various types of TFT active matrix liquid crystal display devices and method of fabrication thereof in which a pixel is divided into three parts, a capacitor is added to each pixel, light shielding is applied to each TFT, and the matrix is driven by a DC cancelling technique.
    Type: Application
    Filed: February 28, 2002
    Publication date: June 27, 2002
    Inventors: Sakae Someya, Ryuuzoh Nashimoto, Hirofumi Suzuki, Katsuhiko Yarita, Shinji Matsumoto, Akira Sasano, Hideaki Taniguchi, Ryouji Oritsuki
  • Liquid crystal display device with its upper and lower cases clamped by crimping portions thereof
    Patent number: 6411353
    Abstract: A liquid crystal display device includes a liquid crystal display element having a liquid crystal layer sandwiched between a pair of upper and lower substrates, a flexible circuit board disposed around a periphery of the liquid crystal display element, an illuminating light source having a line light source, a light guide and a reflector and disposed behind the liquid crystal display element, a metal upper case having a sidewall bent back and a display window, a resin lower case for housing the illuminating light source. The upper and lower cases are clamped by crimping plural nails formed in the sidewall of the upper case at an outer surface of the lower case after stacking the liquid crystal display element, the flexible circuit board and the illuminating light source between the upper and lower cases.
    Type: Grant
    Filed: April 20, 1999
    Date of Patent: June 25, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Katsuhiko Yarita, Kaoru Hasegawa, Kengo Kobayashi, Yoshio Toriyama
  • Liquid crystal display device having smaller frame area
    Patent number: 6411359
    Abstract: A frame area of a liquid crystal display device is reduced by improving the layouts of extraction lines DTM of drain wiring of a TFT liquid crystal display device, a driving IC of the TFT liquid crystal display device and a flexible board FPC2 for a drain driving circuit of the TFT liquid crystal display device.
    Type: Grant
    Filed: April 13, 1999
    Date of Patent: June 25, 2002
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Kengo Kobayashi, Kaoru Hasegawa, Katsuhiko Yarita, Yoshio Toriyama
  • Liquid crystal display device including thin film transistors having gate electrodes completely covering the semiconductor
    Patent number: 6384879
    Abstract: There are disclosed various types of TFT active matrix liquid crystal display devices and method of fabrication thereof in which a pixel is divided into three parts, a capacitor is added to each pixel, light shielding is applied to each TFT, and the matrix is driven by a DC cancelling technique.
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: May 7, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Sakae Someya, Ryuuzoh Nashimoto, Hirofumi Suzuki, Katsuhiko Yarita, Shinji Matsumoto, Akira Sasano, Hideaki Taniguchi, Ryouji Oritsuki
  • TFT active matrix liquid crystal display devices
    Publication number: 20010015776
    Abstract: There are disclosed various types of TFT active matrix liquid crystal display devices and method of fabrication thereof in which a pixel is divided into three parts, a capacitor is added to each pixel, light shielding is applied to each TFT, and the matrix is driven by a DC cancelling technique.
    Type: Application
    Filed: December 28, 2000
    Publication date: August 23, 2001
    Inventors: Sakae Someya, Ryuuzoh Nashimoto, Hirofumi Suzuki, Katsuhiko Yarita, Shinji Matsumoto, Akira Sasano, Hideaki Taniguchi, Ryouji Oritsuki
  • TFT active matrix LCD devices employing two superposed conductive films having different dimensions for the scanning signal lines
    Patent number: 6184963
    Abstract: There are disclosed various types of TFT active matrix liquid crystal display devices and method of fabrication thereof in which a pixel is divided into three parts, a capacitor is added to each pixel, light shielding is applied to each TFT, and the matrix is driven by a DC cancelling technique.
    Type: Grant
    Filed: November 16, 1998
    Date of Patent: February 6, 2001
    Assignee: Hitachi, Ltd.
    Inventors: Sakae Someya, Ryuuzoh Nashimoto, Hirofumi Suzuki, Katsuhiko Yarita, Shinji Matsumoto, Akira Sasano, Hideaki Taniguchi, Ryouji Oritsuki
  • Liquid crystal display device video having signal driving circuit mounted on one side
    Patent number: 5946062
    Abstract: Herein disclosed are a liquid crystal display device and a data processing device, which can have their frame portions reduced in area to reduce the size and weight by extracting the terminals of video signals to only one side of a liquid crystal display panel and by arranging a video signal line driving circuit substrate to be connected with the terminals, only at one side of the display panel.
    Type: Grant
    Filed: July 22, 1998
    Date of Patent: August 31, 1999
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Kaoru Hasegawa, Yoshio Toriyama, Naoto Kobayashi, Katsuhiko Yarita, Hironori Kondo, Masahiko Suzuki, Yoshihiro Imajo
  • TFT active matrix liquid crystal display devices with two layer gate lines, the first being the same level as gate electrodes.
    Patent number: 5838399
    Abstract: There are disclosed various types of TFT active matrix liquid crystal display devices in which a pixel is divided into three parts, a capacitor is added to each pixel, light shielding is applied to each TFT, and the matrix is driven by a DC cancelling technique.
    Type: Grant
    Filed: September 5, 1997
    Date of Patent: November 17, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Sakae Someya, Ryuuzoh Nashimoto, Hirofumi Suzuki, Katsuhiko Yarita, Shinji Matsumoto, Akira Sasano, Hideaki Taniguchi, Ryouji Oritsuki
  • Liquid crystal display device having video signal driving circuit mounted on one side
    Patent number: 5815224
    Abstract: Herein disclosed are a liquid crystal display device and a data processing device, which can have their frame portions reduced in area to reduce the size and weight by extracting the terminals of video signals to only one side of a liquid crystal display panel and by arranging a video signal line driving circuit substrate to be connected with the terminals, only at one side of the display panel.
    Type: Grant
    Filed: March 12, 1997
    Date of Patent: September 29, 1998
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Kaoru Hasegawa, Yoshio Toriyama, Naoto Kobayashi, katsuhiko Yarita, Hironori Kondo, Masahiko Suzuki, Yoshihiro Imajo
  • Liquid crystal display device having video signal driving circuit mounted on one side
    Patent number: 5805249
    Abstract: Herein disclosed are a liquid crystal display device and a data processing device, which can have their frame portions reduced in area to reduce the size and weight by extracting the terminals of video signals to only one side of a liquid crystal display panel and by arranging a video signal line driving circuit substrate to be connected with the terminals, only at one side of the display panel.
    Type: Grant
    Filed: January 8, 1997
    Date of Patent: September 8, 1998
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Kaoru Hasegawa, Yoshio Toriyama, Naoto Kobayashi, Katsuhiko Yarita, Hironori Kondo, Masahiko Suzuki, Yoshihiro Imajo
  • TFT active matrix liquid crystal display devices with two layer gate lines, the first being the same level and material as gate electrodes
    Patent number: 5708484
    Abstract: There are disclosed various types of TFT active matrix liquid crystal display devices in which a pixel is divided into three parts, a capacitor is added to each pixel, light shielding is applied to each TFT, and the matrix is driven by a DC cancelling technique.
    Type: Grant
    Filed: February 29, 1996
    Date of Patent: January 13, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Sakae Someya, Ryuuzoh Nashimoto, Hirofumi Suzuki, Katsuhiko Yarita, Shinji Matsumoto, Akira Sasano, Hideaki Taniguchi, Ryouji Oritsuki
  • Liquid crystal display device having video signal driving circuit mounted on one side and housing
    Patent number: 5640216
    Abstract: Herein disclosed are a liquid crystal display device and a data processing device, which can have their frame portions reduced in area to reduce the size and weight by extracting the terminals of video signals to only one side of a liquid crystal display panel and by arranging a video signal line driving circuit substrate to be connected with the terminals, only at one side of the display panel.
    Type: Grant
    Filed: April 7, 1995
    Date of Patent: June 17, 1997
    Assignees: Hitachi, Ltd., Hitachi Device Engineering Co., Ltd.
    Inventors: Kaoru Hasegawa, Yoshio Toriyama, Naoto Kobayashi, Katsuhiko Yarita, Hironori Kondo, Masahiko Suzuki, Yoshihiro Imajo
  • TFT active matrix liquid crystal display with gate lines having two layers, the gate electrode connected to the wider layer only
    Patent number: 5532850
    Abstract: There are disclosed various types of TFT active matrix liquid crystal display devices in which a pixel is divided into three, a capacitor is added to each pixel, light shielding is applied to each TFT, and the matrix is drived by a DC cancelling technique.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: July 2, 1996
    Assignee: Hitachi, Ltd.
    Inventors: Sakae Someya, Ryuuzoh Nashimoto, Hirofumi Suzuki, Katsuhiko Yarita, Shinji Matsumoto, Akira Sasano, Hideaki Taniguchi, Ryouji Oritsuki
  • TFT active matrix liquid crystal display devices with a holding capacitance between the pixel electrode and a scanning signal line
    Patent number: 5528396
    Abstract: There are disclosed various types of TFT active matrix liquid crystal display devices in which a pixel is divided into three parts, a capacitor is added to each pixel, light shielding is applied to each TFT, and the matrix is driven by a DC cancelling technique.
    Type: Grant
    Filed: July 18, 1994
    Date of Patent: June 18, 1996
    Assignee: Hitachi, Ltd.
    Inventors: Sakae Someya, Ryuuzoh Nashimoto, Hirofumi Suzuki, Katsuhiko Yarita, Shinji Matsumoto, Akira Sasano, Hideaki Taniguchi, Ryouji Oritsuki
  • Liquid crystal display device having a management symbol pattern formed on a substrate
    Patent number: 5477357
    Abstract: Management symbols, such as the type, lot number and production number of an active matrix liquid crystal display panel, can be displayed without any increase in the number of manufacturing steps. A Cr management symbol NO formed at a first patterning step is coated with a gate insulating film GI so that it will not be removed at the time of Cr etching another layer for forming the source and drain electrodes. The management symbol is drawn on the photoresist RST by making use of an X-Y plotter so that different symbols can be easily formed for individual panels.
    Type: Grant
    Filed: September 21, 1993
    Date of Patent: December 19, 1995
    Assignee: Hitachi, Ltd.
    Inventors: Masahiko Suzuki, Katsuhiko Yarita, Hirobumi Kunito, Jun Kikumoto
  • TFT active matrix liquid crystal display devices with plural TFTs in parallel per pixel
    Patent number: 5331447
    Abstract: There are disclosed various types of TFT active matrix liquid crystal display devices in which a pixel is divided into three parts, a capacitor is added to each pixel, light shielding is applied to each TFT, and the matrix is driven by a DC cancelling technique.
    Type: Grant
    Filed: July 8, 1992
    Date of Patent: July 19, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Sakae Someya, Ryuuzoh Nashimoto, Hirofumi Suzuki, Katsuhiko Yarita, Shinji Matsumoto, Akira Sasano, Hideaki Taniguchi, Ryouji Oritsuki
  • TFT active matrix liquid crystal display devices
    Patent number: 5132820
    Abstract: There are disclosed various types of TFT active matrix liquid crystal display devices in which a pixel is divided into three parts, a capacitor is added to each pixel, light shielding is applied to each TFT, and the matrix is driven by a DC cancelling technique.
    Type: Grant
    Filed: June 10, 1988
    Date of Patent: July 21, 1992
    Assignee: Hitachi, Ltd.
    Inventors: Sakae Someya, Ryuuzoh Nashimoto, Hirofumi Suzuki, Katsuhiko Yarita, Shinji Matsumoto, Akira Sasano, Hideaki Taniguchi, Ryouji Oritsuki