Patents by Inventor Akira Tokai

Akira Tokai 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: 20030214223
    Abstract: A display device includes a plurality of light-emitting tubes arranged in parallel consisting of narrow tubes having a plurality of light-emitting points formed in a longitudinal direction thereof, a phosphor layer provided to the inside of each of the narrow tubes, and a discharge gas sealed into each of the narrow tubes. The plurality of light-emitting tubes are arranged in accordance with their property previously measured.
    Type: Application
    Filed: May 2, 2003
    Publication date: November 20, 2003
    Applicant: Fujitsu Limited of Kawasaki, Japan
    Inventors: Manabu Ishimoto, Tsutae Shinoda, Akira Tokai, Hitoshi Yamada, Kenji Awamoto
  • Patent number: 6650055
    Abstract: A display device includes an elongated display tube to be filled with a discharge gas and provided with a phosphor layer therein, a supporter in contact with the display tube for supporting the display tube, and a plurality of electrodes arranged on a surface of the supporter facing the display tube, for externally applying a voltage to the display tube for generating discharge in the display tube so as to perform a display. The supporter has a shape fitting the display tube whereby the electrode is in contact with the display tube along the surface shape of the display tube.
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: November 18, 2003
    Assignee: Fujitsu Limited
    Inventors: Manabu Ishimoto, Tsutae Shinoda, Akira Tokai, Hitoshi Yamada
  • Patent number: 6633117
    Abstract: A display device is provided in which a structure of a display tube is simplified so as to achieve a cost reduction and electric connection to a driving circuit is made easy. In the display device including a group of display tubes arranged in parallel for emitting light by gas discharge, plural transparent auxiliary electrodes for display are arranged in the length direction on the outer surface of the tubular vessel that defines a discharge gas space of each of the display tubes, so that the position of a discharge portion is determined. The auxiliary electrodes at the same position in the length direction of the vessel are connected to one another electrically via a band-like power supplying conductor provided on a front substrate, and a back substrate is arranged on which a band-like conductor is provided along each of the display tubes at the back side of the group of display tubes.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: October 14, 2003
    Assignee: Fujitsu Limited
    Inventors: Tsutae Shinoda, Akira Tokai, Hitoshi Yamada, Manabu Ishimoto
  • Publication number: 20030182967
    Abstract: A flat elliptic thin glass tube for a discharge tube is produced by the following steps: (a) a cylindrical glass tube is hermetically sealed; (b) the cylindrical glass tube is heated and deformed in a mold by an increased internal pressure of the glass tube caused by the heating of the glass tube to form a flat elliptic glass tube, the mold having means for defining at least the minor axis of the flat elliptic glass tube; and (c) the flat elliptic glass tube is heated and drawn to form the flat elliptic thin glass tube.
    Type: Application
    Filed: March 13, 2003
    Publication date: October 2, 2003
    Applicant: FUJITSU LIMITED
    Inventors: Akira Tokai, Hitoshi Yamada, Manabu Ishimoto, Kenji Awamoto, Tsutae Shinoda
  • Publication number: 20030184212
    Abstract: A display device includes elongated display tubes each of which has a discharge gas filled and a phosphor layer formed in the tube; a flexible sheet; a plurality of electrodes; and an adhesive layer. Each of the tubes is flat elliptical in cross section and has a plane section. The flexible sheet abuts against the plane sections of the tubes to support the tubes. The plurality of electrodes are arranged on the tubes abutting surface of the flexible sheet, for applying a voltage to the tubes to generate discharges within the tubes. The adhesive layer is disposed on the tubes abutting surface of the flexible sheet to bond the flexible sheet to the plane sections of the tubes so that the electrodes of the flexible sheet face the plane sections when the flexible sheet abuts against the plane sections of the tubes.
    Type: Application
    Filed: February 25, 2003
    Publication date: October 2, 2003
    Applicant: Fujitsu Limited
    Inventors: Manabu Ishimoto, Tsutae Shinoda, Akira Tokai, Hitoshi Yamada, Kenji Awamoto
  • Publication number: 20030180456
    Abstract: A method for forming a coating film on an internal surface of an elongated tube, includes longitudinally holding the elongated tube, applying a coating solution to the internal surface of the elongated tube; and drying the coating solution while carrying out a heat process for sequentially heating the elongated tube by using a heat source. The heat process includes adjusting the descending rate of the heat source so that a through-hole in the elongated tube is clogged with the coating solution whose viscosity is reduced by heating of the heat source, and sucking the through-hole in the elongated tube from the lower side thereof so that a portion of the through-hole that is clogged with the coating solution moves downwards along the elongated tube.
    Type: Application
    Filed: March 20, 2003
    Publication date: September 25, 2003
    Applicant: FUJITSU LIMITED
    Inventors: Hitoshi Yamada, Akira Tokai, Manabu Ishimoto, Kenji Awamoto, Tsutae Shinoda
  • Patent number: 6601629
    Abstract: A method for transferring a three-dimensional structure onto a substrate, which includes filling a plurality of concaves arranged on a sheet-form mold with a paste-like structural material, temporarily fixing the mold to a support member, contact-bonding the structural material in a state in which the structural material has the adhesion property or bonding property to the substrate together with the mold, releasing the temporary fixation of the mold by the support member after the contact-bonding, and removing the mold from the substrate, thereby transferring a three-dimensional structure onto the substrate.
    Type: Grant
    Filed: October 7, 2002
    Date of Patent: August 5, 2003
    Assignee: Fujitsu, Limited
    Inventors: Osamu Toyoda, Akira Tokai, Motonari Kifune, Keiichi Betsui
  • Publication number: 20030122485
    Abstract: A gas discharge tube has a phosphor layer formed and a discharge gas enclosed within an elongated tube which is to serve as the gas discharge tube. The gas discharge tube includes a light-emitting section and a cleaning section for cleaning the discharge gas. The cleaning section is connected to the light-emitting section.
    Type: Application
    Filed: October 3, 2002
    Publication date: July 3, 2003
    Applicant: Fujitsu Limited
    Inventors: Akira Tokai, Hitoshi Yamada, Manabu Ishimoto, Tsutae Shinoda
  • Patent number: 6577060
    Abstract: A display device has a screen made of a substrate and a group of elongated illuminators that are arranged on the substrate. Elongated electrode supporters are arranged on at least one side of the illuminators in the width direction. The elongated electrode supporter has plural electrodes that am spaced along the longitudinal direction of the illuminator and define corresponding discharge cells. A wiring conductive pattern is formed on the substrate for supplying electricity to the plural electrodes of the electrode supporter. Selective light emission from the discharge cells of the illuminator is controlled by signals applied to the wiring conductive pattern and the plural electrodes.
    Type: Grant
    Filed: December 5, 2000
    Date of Patent: June 10, 2003
    Assignee: Fujitsu Limited
    Inventors: Akira Tokai, Manabu Ishimoto, Tutae Shinoda, Keiichi Betsui
  • Patent number: 6562552
    Abstract: A method of manufacturing a panel assembly used to assemble a display panel intends to achieve an alignment-free between barrier ribs and a fluorescent layer and minimize the waste of a barrier rib material for cost reduction. On a support body 51 which is not a substrate, formed are a plurality of walls 281 through 283 made of a fluorescent material that are belt-shaped in plan view arranged in stripes, an electrode material layer a1, and a barrier rib material filling spaces between the walls. The support body 51 and a substrate 21 are coupled so that the barrier rib material faces the substrate. The walls 281 through 283, the electrode material layer a1 and the barrier rib material 291 are transferred in one step to the substrate 21, and thus a panel assembly 20 having barrier ribs 29, electrodes A and fluorescent layers 28R, 28G and 28B is obtained.
    Type: Grant
    Filed: January 29, 2001
    Date of Patent: May 13, 2003
    Assignee: Fujitsu Limited
    Inventors: Osamu Toyoda, Shinji Tadaki, Akira Tokai, Keiichi Betsui
  • Publication number: 20030052592
    Abstract: A display device is provided in which a structure of a display tube is simplified so as to achieve a cost reduction and electric connection to a driving circuit is made easy. In the display device including a group of display tubes arranged in parallel for emitting light by gas discharge, plural transparent auxiliary electrodes for display are arranged in the length direction on the outer surface of the tubular vessel that defines a discharge gas space of each of the display tubes, so that the position of a discharge portion is determined. The auxiliary electrodes at the same position in the length direction of the vessel are connected to one another electrically via a band-like power supplying conductor provided on a front substrate, and a back substrate is arranged on which a band-like conductor is provided along each of the display tubes at the back side of the group of display tubes.
    Type: Application
    Filed: February 26, 2002
    Publication date: March 20, 2003
    Applicant: FUJITSU LIMITED
    Inventors: Tsutae Shinoda, Akira Tokai, Hitoshi Yamada, Manabu Ishimoto
  • Publication number: 20030049990
    Abstract: A method of forming a phosphor layer of a gas discharge tube provided with the phosphor layer on an internal surface of an elongated tubular vessel forming a discharge space. The method includes the steps of introducing a slurry of phosphor powder and a binding resin dispersed in a medium into the tubular vessel, holding the tubular vessel sideways to deposit the phosphor powder and the binding resin in the tubular vessel, and removing the medium from the tubular vessel, thereby forming a phosphor layer on one side of the internal surface of the tubular vessel.
    Type: Application
    Filed: March 19, 2002
    Publication date: March 13, 2003
    Applicant: Fujitsu Limited
    Inventors: Hitoshi Yamada, Akira Tokai, Manabu Ishimoto, Tsutae Shinoda
  • Publication number: 20030048077
    Abstract: A display device includes an elongated display tube to be filled with a discharge gas and provided with a phosphor layer therein, a supporter in contact with the display tube for supporting the display tube, and a plurality of electrodes arranged on a surface of the supporter facing the display tube, for externally applying a voltage to the display tube for generating discharge in the display tube so as to perform a display. The supporter has a shape fitting the display tube whereby the electrode is in contact with the display tube along the surface shape of the display tube.
    Type: Application
    Filed: March 22, 2002
    Publication date: March 13, 2003
    Applicant: FUJITSU LIMITED
    Inventors: Manabu Ishimoto, Tsutae Shinoda, Akira Tokai, Hitoshi Yamada
  • Publication number: 20030048068
    Abstract: A gas discharge tube having a phosphor layer formed within a tubular vessel defining a discharge space. The gas discharge tube includes a supporting member independent of the tubular vessel. The phosphor layer is formed on the supporting member. The supporting member is inserted within the discharge space.
    Type: Application
    Filed: March 26, 2002
    Publication date: March 13, 2003
    Applicant: FUJITSU LIMITED
    Inventors: Hitoshi Yamada, Akira Tokai, Manabu Ishimoto, Tsutae Shinoda
  • Publication number: 20030042839
    Abstract: An AC-type gas discharge display includes a base, discharge tubes which are arranged on the base in parallel to each other and which contain fluorescent phosphors, data electrodes formed on the external surfaces of the discharge tubes such that the data electrodes extend in the longitudinal direction of the discharge tubes, and display electrodes formed in pairs on the external surfaces of the discharge tubes at the opposite side of the data electrodes such that the display electrodes intersect the discharge tubes. Each of the discharge tubes has a flattened elliptical shape in cross-section thereof and includes a pair of flat portions. The data electrodes are formed on one of the flat portions and scanning electrodes and common electrodes are alternately arranged on the other one of the flat portions, and the discharge tubes are supported by the base at one or the other one of the flat portions.
    Type: Application
    Filed: January 22, 2002
    Publication date: March 6, 2003
    Applicant: FUJITSU LIMITED
    Inventors: Manabu Ishimoto, Tsutae Shinoda, Akira Tokai, Hitoshi Yamada
  • Publication number: 20030029553
    Abstract: A method for transferring a three-dimensional structure onto a substrate, which includes filling a plurality of concaves arranged on a sheet-form mold with a paste-like structural material, temporarily fixing the mold to a support member, contact-bonding the structural material in a state in which the structural material has the adhesion property or bonding property to the substrate together with the mold, releasing the temporary fixation of the mold by the support member after the contact-bonding, and removing the mold from the substrate, thereby transferring a three-dimensional structure onto the substrate.
    Type: Application
    Filed: October 7, 2002
    Publication date: February 13, 2003
    Applicant: Fujitsu, Ltd.
    Inventors: Osamu Toyoda, Akira Tokai, Motonari Kifune, Keiichi Betsui
  • Publication number: 20030025451
    Abstract: A gas discharge tube includes a plurality of light-emitting portions that are provided outside of the tube and comprise at least two discharge electrodes, and an electron emission film formed on the entire inner wall of the tube for improving discharge characteristics.
    Type: Application
    Filed: February 19, 2002
    Publication date: February 6, 2003
    Applicant: Fujitsu Limited
    Inventors: Hitoshi Yamada, Akira Tokai, Manabu Ishimoto, Tsutae Shinoda
  • Publication number: 20030025440
    Abstract: A display tube is provided that can improve light emission efficiency without raising a breakdown voltage. The display tube has a tubular vessel defining a discharge gas space and a pair of display electrodes for generating surface discharge along the circumferential surface of the vessel and opposing discharge traversing the inside of the vessel.
    Type: Application
    Filed: March 12, 2002
    Publication date: February 6, 2003
    Applicant: FUJITSU LIMITED
    Inventors: Manabu Ishimoto, Tsutae Shinoda, Akira Tokai, Hitoshi Yamada
  • Patent number: 6485596
    Abstract: A method for transferring a three-dimensional structure onto a substrate, which includes filling a plurality of concaves arranged on a sheet-form mold with a paste-like structural material, temporarily fixing the mold to a support member, contact-bonding the structural material in a state in which the structural material has the adhesion property or bonding property to the substrate together with the mold, releasing the temporary fixation of the mold by the support member after the contact-bonding, and removing the mold from the substrate, thereby transferring a three-dimensional structure onto the substrate.
    Type: Grant
    Filed: September 12, 2000
    Date of Patent: November 26, 2002
    Assignee: Fujitsu Limited
    Inventors: Osamu Toyoda, Akira Tokai, Motonari Kifune, Keiichi Betsui
  • Patent number: 6482575
    Abstract: A method of preparing a barrier rib master pattern for barrier rib transfer, which includes the steps of forming a photosensitive material layer on a substrate performing oblique exposure by projecting exposure light onto the photosensitive material layer with the intervention of a photomask obliquely with respect to the substrate, and developing the photosensitive material layer, whereby a rib pattern having tapered side walls is formed on the substrate.
    Type: Grant
    Filed: April 6, 2001
    Date of Patent: November 19, 2002
    Assignee: Fujitsu Limited
    Inventors: Akira Tokai, Osamu Toyoda, Keiichi Betsui