Patents by Inventor Shigeo Kasahara

Shigeo Kasahara 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: 5860843
    Abstract: Disclosed are a plasma display panel and a manufacturing method therefor. According to the present invention, a method for manufacturing a plasma display panel comprises the steps of: forming a plurality of electrodes on insulating substrates; forming a conductive paste layer on the insulating substrates ; forming a masking film on the paste layer at locations between the electrodes; forcefully impelling particles against the paste layer to remove, by etching, portions of the paste layer where the masking film is not deposited; and exposing the paste layer to an annealing atmosphere so as to form partition walls between the electrodes.
    Type: Grant
    Filed: March 6, 1997
    Date of Patent: January 19, 1999
    Assignee: Fujitsu Ltd.
    Inventor: Shigeo Kasahara
  • Patent number: 5856815
    Abstract: A method for driving a surface-stabilized ferroelectric liquid crystal display element uses a selection voltage, a half-selection voltage, and a non-selection voltage. A relative ratio between the selection voltage, half-selection voltage, and non-selection voltage of a drive signal is changed, or absolute levels of the selection voltage, half-selection voltage, and non-selection voltage are changed. Consequently, a plurality of gradations of the surface-stabilized ferroelectric liquid crystal display element can be obtained.
    Type: Grant
    Filed: July 16, 1996
    Date of Patent: January 5, 1999
    Assignee: Fujitsu Limited
    Inventors: Akihiro Mochizuki, Shigeo Kasahara, Katsusada Motoyoshi
  • Patent number: 5825128
    Abstract: A plasma display panel has a matrix of plural first straight electrodes and plural straight second electrodes, respectively crossing each other, and a unit color element located at a crossing point of the first and second electrodes. A plurality of separator walls are spaced apart from each other and extend along the second electrodes, dividing a discharge space into a plurality of channels extending along respective, second electrodes. The separator walls undulate with a fixed periodicity so as to define alternating wide and narrow portions aligned along each channel and the respective first electrode. A fluorescent material is coated in each channel, the colors emitted from the fluorescent material being identical in each channel. A gas discharge takes place selectively at the wide portions in cooperation with the respective first and second electrodes.
    Type: Grant
    Filed: August 9, 1996
    Date of Patent: October 20, 1998
    Assignee: Fujitsu Limited
    Inventors: Keiichi Betsui, Shin'ya Fukuta, Tadayoshi Kosaka, Fumihiro Namiki, Osamu Toyoda, Shigeo Kasahara
  • Patent number: 5812232
    Abstract: An optical switching device of the present invention includes at least two substrates disposed facing opposite to each other. By scattering hard spacers which are thermally undeformable and soft spacers which are larger in size than the hard spacers and adapted to deform and then to cure by heat to adhere to the substrates, the spacing defined between the substrates is kept constant by diameters of the hard spacers. A medium having an optical switching function is retained in a gap defined between the substrates. The periphery of the gap between the substrates is sealed with a sealer. The sealer is made of a thermosetting resin having a thermosetting point equal to or higher than the thermosetting point of the soft spacers.
    Type: Grant
    Filed: April 5, 1996
    Date of Patent: September 22, 1998
    Assignee: Fujitsu Limited
    Inventors: Hironori Shiroto, Akihiro Mochizuki, Shigeo Kasahara, Tetsuya Makino, Tohru Itoh, Masashi Watanabe, Toshiaki Yoshihara
  • Patent number: 5791960
    Abstract: A method for fabrication of a display device is provided which comprises the steps of: forming an aluminum electrode having a predetermined configuration on a substrate; and treating the aluminum electrode with a solution containing an oxidizing agent to form on a surface of the aluminum electrode a compound film containing as a principal component a substance derived from the solution containing the oxidizing agent.
    Type: Grant
    Filed: November 25, 1996
    Date of Patent: August 11, 1998
    Assignee: Fujitsu Ltd.
    Inventors: Shinya Fukuta, Shigeo Kasahara
  • Patent number: 5755042
    Abstract: Air-blowing nozzles 21 for blowing a hot air are provided in both sides of an electrode sheet 33 for a battery both surfaces of which an electrode compounding agent has been applied to. In each of the air-blowing nozzles 21, a pair of slit-shaped blowholes 65 being extended in the width direction of the electrode sheet 33 are provided on both of the upper and lower sides of the end face part 63. The hot air blown off from a pair of the upper and lower blowholes 65 dries the electrode compounding agent as well as pressurizes a space between the electrode sheet 33 and the end face part 63 to form a pressure room P, and the left and right pressure rooms P hold the electrode sheet 33 to suppress its sway.
    Type: Grant
    Filed: January 16, 1997
    Date of Patent: May 26, 1998
    Assignees: Toshiba Battery Co., Ltd., Toshiba Kikai Kabushiki Kaisha
    Inventors: Gen Takayama, Tsutomu Horikoshi, Shigeo Kasahara, Yoshiyuki Sakai, Toshihiko Kusago, Yasuhiro Kuroki
  • Patent number: 5739885
    Abstract: In a ferroelectric liquid crystal display comprising a pair of transparent substrates each provided with a transparent electrode and an aligning film and a liquid crystal layer sandwiched between said substrates, the aligning film is subjected to a deionization treatment with, for example, an ion-exchange resin to reduce the total content of impurity ions in the aligning film of a polyimide resin or the like to 300 ppm or less, to reduce the total content of impurity cations to 200 ppm or less, to reduce the total content of Cl.sup.-, (COO.sub.2).sup.2- and CH.sub.3 COO.sup.- to 100 ppm or less and the content of each of these ions to 50 ppm or less, or to reduce the total content of PO.sub.4.sup.3-, NO.sub.3.sup.- and SO.sub.4.sup.2- to 100 ppm or less and the content of each of these ions to 50 ppm or less.
    Type: Grant
    Filed: April 4, 1997
    Date of Patent: April 14, 1998
    Assignee: Fujitsu Limited
    Inventors: Akihiro Mochizuki, Shigeo Kasahara, Tetsuya Makino, Masashi Watanabe
  • Patent number: 5689900
    Abstract: Air-blowing nozzles 21 for blowing a hot air are provided in both sides of an electrode sheet 33 for a battery both surfaces of which an electrode compounding agent has been applied to. In each of the air-blowing nozzles 21, a pair of slit-shaped blowholes 65 being extended in the width direction of the electrode sheet 33 are provided on both of the upper and lower sides of the end face part 63. The hot air blown off from a pair of the upper and lower blowholes 65 dries the electrode compounding agent as well as pressurizes a space between the electrode sheet 33 and the end face part 63 to form a pressure room P, and the left and right pressure rooms P hold the electrode sheet 33 to suppress its sway.
    Type: Grant
    Filed: August 20, 1996
    Date of Patent: November 25, 1997
    Assignees: Toshiba Battery Co., Ltd., Toshiba Kikai Kabushiki Kaisha
    Inventors: Gen Takayama, Tsutomu Horikoshi, Shigeo Kasahara, Yoshiyuki Sakai, Toshihiko Kusago, Yasuhiro Kuroki
  • Patent number: 5487417
    Abstract: This invention provides an electrolyte injection apparatus capable of injecting an electrolyte accurately into a battery which does not contain an electrolyte yet and in which an electrode group consisting of a laminated structure formed by interposing a separator between positive and negative electrodes is accommodated in a case such that a lamination plane of the electrode group is parallel to the direction of depth of the case.
    Type: Grant
    Filed: August 31, 1994
    Date of Patent: January 30, 1996
    Assignee: Toshiba Battery Co., Ltd.
    Inventors: Shigeo Kasahara, Kiyoshi Sueoka, Gen Takayama, Shingo Satoh, Hidemi Houjyou
  • Patent number: 5348685
    Abstract: This invention is directed to reduce the viscosity of a naphthalene type mixed liquid crystal and to improve display quality while maintaining a bookshelf layer structure. The ferroelectric liquid crystal composition of the present invention comprises 70 to 97 parts by weight of a naphthalene base mixed liquid crystal and 3 to 30 parts by weight of a predetermined tolan type liquid crystal.
    Type: Grant
    Filed: August 17, 1993
    Date of Patent: September 20, 1994
    Assignees: Fujitsu Limited, Mitsui Toatsu Chemicals, Inc., Sanyo Chemical Industries, Ltd.
    Inventors: Akihiro Mochizuki, Shigeo Kasahara, Tetsuya Makino, Masashi Watanabe, Masakatsu Nakatsuka, Kunikiyo Yoshio, Masahiro Satoh, Tetsuya Watanabe, Naoko Sugita, Tatsuroh Yanagi