Patents by Inventor Koji Yamabuchi

Koji Yamabuchi 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: 7388628
    Abstract: A liquid crystal fabrication method includes the steps of: dropping liquid crystal on a first substrate at an upper surface inside regions enclosed by a sealing agent disposed thereon; overlaying a second substrate on the first substrate downward to stick the substrates together; sticking a polarizing plate on an upper surface of the first and second substrates; and collectively dividing the first and second substrates and the polarizing plate.
    Type: Grant
    Filed: September 20, 2006
    Date of Patent: June 17, 2008
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Koji Yamabuchi, Makoto Nakahara, Akinori Izumi
  • Publication number: 20070259589
    Abstract: A liquid crystal display panel manufacturing apparatus is provided with a stage for fixing a substrate having an optical film adhered to at least one of surfaces of the substrate. The stage has a suction hole for attracting the substrate by suction. The stage has an interposition member located around a region provided with the suction hole, and the interposition member has a closed frame-like form in a plan view. A display panel manufacturing apparatus that can stably fix the substrate is provided.
    Type: Application
    Filed: December 26, 2005
    Publication date: November 8, 2007
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Akinori Izumi, Kazuya Kaida, Koji Yamabuchi, Makoto Nakahara, Nobuo Sasaki
  • Patent number: 7202923
    Abstract: A liquid crystal fabrication method includes the steps of: dropping liquid crystal on a first substrate at an upper surface inside regions enclosed by a sealing agent disposed thereon; overlaying a second substrate on the first substrate downward to stick the substrates together; sticking a polarizing plate on an upper surface of the first and second substrates; and collectively dividing the first and second substrates and the polarizing plate.
    Type: Grant
    Filed: February 27, 2004
    Date of Patent: April 10, 2007
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Koji Yamabuchi, Makoto Nakahara, Akinori Izumi
  • Publication number: 20070054066
    Abstract: A circularly polarizing plate includes a ?/4 phase difference plate and a linearly polarizing plate overlaid on a main surface of the ?/4 phase difference plate and having an absorption axis forming an angle of about 45° with respect to a lagging axis of the ?/4 phase difference plate. The ?/4 phase difference plate has reverse wavelength dispersion characteristics and an Nz coefficient of 1.6 or more. Employment of this structure can provide the circularly polarizing plate having good view angle characteristics and a vertical alignment type of liquid crystal display panel having the same.
    Type: Application
    Filed: October 20, 2004
    Publication date: March 8, 2007
    Inventors: Naru Usukura, Manabu Abiru, Takayuki Natsume, Koji Yamabuchi, Makoto Nakahara
  • Publication number: 20070013858
    Abstract: A liquid crystal fabrication method includes the steps of: dropping liquid crystal on a first substrate at an upper surface inside regions enclosed by a sealing agent disposed thereon; overlaying a second substrate on the first substrate downward to stick the substrates together; sticking a polarizing plate on an upper surface of the first and second substrates; and collectively dividing the first and second substrates and the polarizing plate.
    Type: Application
    Filed: September 20, 2006
    Publication date: January 18, 2007
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Koji Yamabuchi, Makoto Nakahara, Akinori Izumi
  • Publication number: 20050056127
    Abstract: A method for cutting apart a glass substrate is provided whereby scribing of the glass substrate is possible without being affected by the presence or thickness of a deposited film formed thereon and without scratching the deposited film. To treat a glass substrate (1) having a deposited film (1a), such as a thin film or resin film, formed on one surface thereof, there are provided a shaving means (202), which is a blade that removes strip-shaped portions of the deposited film (1a) to expose strip-shaped regions on the glass substrate (1), and a wheel cutter (14a) that forms scribed lines along the strip-shaped regions exposed on the glass substrate (1). The glass substrate (1) is cut apart along the scribed lines.
    Type: Application
    Filed: November 5, 2002
    Publication date: March 17, 2005
    Inventors: Koji Yamabuchi, Tomohisa Komoda, Kazuya Kaida, Akinori Izumi, Takane Horiuchi, Shinya Takabe, Toshimitsu Furuya, Tetsuro Katayama
  • Publication number: 20040169809
    Abstract: A liquid crystal fabrication method includes the steps of: dropping liquid crystal on a first substrate at an upper surface inside regions enclosed by a sealing agent disposed thereon; overlaying a second substrate on the first substrate downward to stick the substrates together; sticking a polarizing plate on an upper surface of the first and second substrates; and collectively dividing the first and second substrates and the polarizing plate.
    Type: Application
    Filed: February 27, 2004
    Publication date: September 2, 2004
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Koji Yamabuchi, Makoto Nakahara, Akinori Izumi
  • Publication number: 20040095526
    Abstract: A liquid crystal fabrication method includes the steps of: dropping liquid crystal (104) on a first substrate (101) at an upper surface inside regions enclosed by a sealing agent (103) disposed thereon; overlaying a second substrate (102) on the first substrate (101) downward to stick the substrates together; sticking a polarizing plate (106) on an upper surface of the first and second substrates (101, 102); and collectively dividing the first and second substrates and the polarizing plate.
    Type: Application
    Filed: September 18, 2003
    Publication date: May 20, 2004
    Inventors: Koji Yamabuchi, Makoto Nakahara, Akinori Izumi
  • Patent number: 6155511
    Abstract: A capstan motor which includes: a stator yoke having a multiple number of coils provided on a circle centered about a rotational shaft; and a rotor yoke having an annular magnet opposing the multiple number of coils and rotating integrally with the rotational shaft, and is constructed such that a hysteresis plate is provided opposing the rotor yoke on the side opposite the multiple number of coils for receiving leakage of the magnetic flux from the magnet and is attached rotatably relative to the rotary shaft; and driving force for rotation is extracted from the hysteresis plate, and a tape driving system using it.
    Type: Grant
    Filed: March 16, 1999
    Date of Patent: December 5, 2000
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takamitsu Tadera, Koji Yamabuchi, Mitsunobu Yoshida
  • Patent number: 5963394
    Abstract: The magnetic recording reproducing apparatus is of a type in which magnetic tape is loaded approximately parallel to a reference plane of a cassette, and in a tape guide group on magnetic tape take up side of a rotary head drum, a first take up side inclined guide on which magnetic tape is wound around immediately after it moves away from rotary head, a take up side guide roller arranged downstream and a second take up side inclined guide are included. Height of a lead formed at a fixed portion of rotary head drum is set such that it becomes lower than the lower end of the magnetic tape for its entire region, at the time of loading and unloading of the magnetic tape. By this structure, contact between the lower end of the magnetic tape and the edge of the lead at the time of loading and unloading of the magnetic tape can be avoided, and therefore damage on the magnetic tape caused by the lead edge can be prevented, and the life of the tape can be made longer.
    Type: Grant
    Filed: February 26, 1997
    Date of Patent: October 5, 1999
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Koji Yamabuchi, Mitsunobu Yoshida, Hideshi Ohtsuka
  • Patent number: 5361180
    Abstract: A loading lever having loading lever pins is fixed on a main chassis. Loading arms having loading arm depressed portions are rotatably attached to a slide chassis. The loading arm depressed portion engages with the loading lever pin, and the loading arm depressed portion is engaged with the loading lever pin, and in this state, the slide chassis moves in the direction of the arrow B. Therefore, loading arms move in the direction of the arrows J and K. Since the loading arms are rotated, it becomes unnecessary to slide the loading lever, and therefore, the structure of the magnetic recording reproducing apparatus can be made simple.
    Type: Grant
    Filed: March 5, 1992
    Date of Patent: November 1, 1994
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Koji Yamabuchi, Hideshi Ohtsuka, Takashi Koyama, Yoshiyuki Yokomachi, Kazutaka Abe, Akio Tanaka