Patents by Inventor Keiichi Betsui

Keiichi Betsui 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: 20030052846
    Abstract: Ferroelectric liquid crystal having spontaneous polarization is provided between two confronting substrates; pixel electrodes corresponding to liquid crystal cells, TFTs for switching connected to the pixel electrodes and storage capacitors for storing electric charge in the pixel electrodes are provided on the inner face of one of the substrates;; wherein a ratio (CS/CLC) of capacity of storage capacitor (CS) against that of liquid crystal cell (CLC) satisfies 0.2≦CS/CLC≦5. Driving voltage for liquid crystal material is maintained at a low level, and a liquid crystal material with large spontaneous polarization can be employed.
    Type: Application
    Filed: January 15, 2002
    Publication date: March 20, 2003
    Applicant: FUJITSU LIMITED
    Inventors: Toshiaki Yoshihara, Keiichi Betsui, Tetsuya Makino
  • Publication number: 20030043103
    Abstract: In a liquid crystal display device that uses a liquid crystal material having spontaneous polarization and is actively driven by a TFT, a voltage corresponding to image data is applied twice by driving the TFT of each pixel electrode on a line by line basis of a liquid crystal panel, during writing in one frame. During erasure in one frame, voltage application to liquid crystal by batch selection of all the pixel electrodes is performed three times. With this three times of voltage application, it is possible to achieve a black display state in each pixel and make the stored charge amount at the liquid crystal in each pixel substantially zero.
    Type: Application
    Filed: October 29, 2002
    Publication date: March 6, 2003
    Applicant: FUJITSU LIMITED
    Inventors: Toshiaki Yoshihara, Shinji Tadaki, Tetsuya Makino, Hironori Shiroto, Yoshinori Kiyota, Keiichi Betsui
  • 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: 20030025088
    Abstract: A charged particle beam exposure method includes the steps of creating dot pattern data indicative of a pattern to be exposed, storing the dot pattern data in a first storage device having a first access speed, transferring the dot pattern data from the first storage device to a second storage device having a second, higher access speed, reading the dot pattern data out from the second storage device, and producing a plurality of charged particle beams in response to the dot pattern data read out from the second storage device by means of a blanking aperture array, wherein the blanking aperture array includes a plurality of apertures each causing turning-on and turning-off of a changed particle beam pertinent to the aperture in response to the dot pattern data.
    Type: Application
    Filed: September 11, 2002
    Publication date: February 6, 2003
    Applicant: Fujitsu Limited
    Inventors: Yoshihisa Oae, Tomohiko Abe, Soichiro Arai, Shigeru Maruyama, Hiroshi Yasuda, Kenichi Miyazawa, Junichi Kai, Takamasa Satoh, Keiichi Betsui, Hideki Nasuno
  • Publication number: 20030011739
    Abstract: A liquid crystal layer is formed by filing the space between alignment films formed on two glass substrates, respectively, with a ferroelectric liquid crystal having spontaneous polarization. When the maximum charge amount injected to each pixel by the switching of a switching element, the area of each pixel electrode and the magnitude of the spontaneous polarization of the ferroelectric liquid crystal per unit area are denoted as Q, A, and PS, respectively, the relation 2PS·A>Q is established. A cone angle 2&thgr; (&thgr;: tilt angle) of the ferroelectric liquid crystal is not smaller than 45°. It is possible to use a liquid crystal material having large spontaneous polarization, and a high-speed response is realized even when a low voltage is applied to the liquid crystal material.
    Type: Application
    Filed: December 20, 2001
    Publication date: January 16, 2003
    Applicant: FUJITSU LIMITED
    Inventors: Toshiaki Yoshihara, Keiichi Betsui, Hironori Shiroto
  • Publication number: 20030010894
    Abstract: In a display device employing a field-sequential method, a judgement whether display data is motion picture data or still picture data is made, and the frame number per second is increased for the display of a motion picture during which color break easily occurs by the movement of the line of sight of a user, while the frame number is made smaller than that for the display of a motion picture, for the display of a still picture during which color break hardly occurs. Further, the temperature of a liquid crystal panel is detected, and the frame number per second is increased so as to reduce color break when the result of the detection is not lower than a predetermined temperature, while, the frame number is decreased so as to enable display at low temperature when the result of the detection is lower than the predetermined temperature.
    Type: Application
    Filed: December 18, 2001
    Publication date: January 16, 2003
    Applicant: FUJITSU LIMITED
    Inventors: Toshiaki Yoshihara, Keiichi Betsui, Tetsuya Makino
  • Patent number: 6486479
    Abstract: A charged particle beam exposure method including the steps of creating dot pattern data indicative of a pattern to be exposed, storing the dot indicative of a pattern to be exposed, storing the dot pattern data in a first storage device having a first access speed, transferring the dot pattern data from the first storage device to a second storage device having a second, higher access speed, reading the dot pattern data out from the second storage device; and producing a plurality of charged particle beams in response to the dot pattern data read out from the second storage device by means of a blanking aperture array. The blanking aperture array includes a plurality of apertures each causing turning-on and turning-off of a changed particle beam pertinent to the aperture in response to the dot pattern data.
    Type: Grant
    Filed: June 7, 2000
    Date of Patent: November 26, 2002
    Assignee: Fujitsu Limited
    Inventors: Yoshihisa Oae, Tomohiko Abe, Soichiro Arai, Shigeru Maruyama, Hiroshi Yasuda, Kenichi Miyazawa, Junichi Kai, Takamasa Satoh, Keiichi Betsui, Hideki Nasuno
  • 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
  • Patent number: 6420831
    Abstract: Local losses of material of transparent electrodes, in a plasma display panel including transparent electrodes, bus electrodes and, a dielectric layer covering these electrodes, are prevented by using a plasma display panel according to the present invention. The plasma display panel is formed on at least one substrate of a pair of substrates provided opposite each other via a discharge space. An element, which is a main element of the bus electrode composition, is included in the composition of the dielectric layer. Since the main element of the bus electrode is included in the dielectric layer, local losses of the transparent electrode can be prevented even through the high temperature baking process of the dielectric layer. A preferred choice as the main element of the bus electrode composition is copper, but other elements are also suitable and will perform acceptably.
    Type: Grant
    Filed: July 25, 2001
    Date of Patent: July 16, 2002
    Assignees: Fujitsu Limited, Central Glass Company, Limited
    Inventors: Noriyuki Awaji, Shinji Tadaki, Keiichi Betsui
  • Publication number: 20020042025
    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: Application
    Filed: April 6, 2001
    Publication date: April 11, 2002
    Inventors: Akira Tokai, Osamu Toyoda, Keiichi Betsui
  • Publication number: 20020017853
    Abstract: The present invention relates to a plasma display panel comprising transparent electrodes and a dielectric layer covering said transparent electrodes on at least one substrate of a pair of substrates facing each other with a discharge space therebetween, the main constituent of the transparent electrodes is included in the dielectric layer. Further, the main constituent of the transparent electrode is indium oxide and indium oxide is included in the dielectric layer. By including the main constituent of the transparent electrodes in the dielectric layer, it is believed that the drop in conductivity caused by diffusion of the dielectric substance in the transparent electrodes during high-temperature processing is prevented.
    Type: Application
    Filed: October 3, 2001
    Publication date: February 14, 2002
    Inventors: Noriyuki Awaji, Keiichi Betsui, Shinji Tadaki
  • Patent number: 6344713
    Abstract: The present invention relates to a plasma display panel comprising transparent electrodes and a dielectric layer covering said transparent electrodes on at least one substrate of a pair of substrates facing each other with a discharge space therebetween, the main constituent of the transparent electrodes is included in the dielectric layer. Further, the main constituent of the transparent electrode is indium oxide and indium oxide is included in the dielectric layer. By including the main constituent of the transparent electrodes in the dielectric layer, it is believed that the drop in conductivity caused by diffusion of the dielectric substance in the transparent electrodes during high-temperature processing is prevented.
    Type: Grant
    Filed: July 14, 1997
    Date of Patent: February 5, 2002
    Assignee: Fujitsu Limited
    Inventors: Noriyuki Awaji, Keiichi Betsui, Shinji Tadaki
  • Patent number: 6337538
    Abstract: Local losses of material of transparent electrodes, in a plasma display panel including transparent electrodes, bus electrodes and, a dielectric layer covering these electrodes, are prevented by using a plasma display panel according to the present invention. The plasma display panel is formed on at least one substrate of a pair of substrates provided opposite each other via a discharge space. An element, which is a main element of the bus electrode composition, is included in the composition of the dielectric layer. Since the main element of the bus electrode is included in the dielectric layer, local losses of the transparent electrode can be prevented even through the high temperature baking process of the dielectric layer. A preferred choice as the main element of the bus electrode composition is copper, but other elements are also suitable and will perform acceptably.
    Type: Grant
    Filed: January 26, 1999
    Date of Patent: January 8, 2002
    Assignee: Fujitsu Limited
    Inventors: Noriyuki Awaji, Shinji Tadaki, Keiichi Betsui
  • Publication number: 20020000774
    Abstract: Local losses of material of transparent electrodes, in a plasma display panel including transparent electrodes, bus electrodes and, a dielectric layer covering these electrodes, are prevented by using a plasma display panel according to the present invention. The plasma display panel is formed on at least one substrate of a pair of substrates provided opposite each other via a discharge space. An element, which is a main element of the bus electrode composition, is included in the composition of the dielectric layer. Since the main element of the bus electrode is included in the dielectric layer, local losses of the transparent electrode can be prevented even through the high temperature baking process of the dielectric layer. A preferred choice as the main element of the bus electrode composition is copper, but other elements are also suitable and will perform acceptably.
    Type: Application
    Filed: January 26, 1999
    Publication date: January 3, 2002
    Inventors: NORIYUKI AWAJI, SHINJI TADAKI, KEIICHI BETSUI
  • Patent number: 6333142
    Abstract: The invention relates to a method for forming barrier ribs of a plasma display panel. A master of barrier ribs for fabricating a mold for transferring barrier ribs is easily produced without the use of a machining technique. In the method for forming barrier ribs of a plasma display panel, a light-transmissive substrate having a predetermined pattern of a light-tight material formed on a surface and a photosensitive material layer bonded on the pattern is exposed to light from the rear surface of the light-transmissive substrate and developed so as to fabricate a master in which convex portions in a rib configuration are formed on the light-transmissive substrate. By using the master, a transfer mold for barrier ribs is fabricated. A rib material is filled in concave portions of the transfer mold and transferred onto a substrate for a PDP, thereby forming barrier ribs on the substrate for the PDP.
    Type: Grant
    Filed: December 13, 2000
    Date of Patent: December 25, 2001
    Assignee: Fujitsu Limited
    Inventors: Osamu Toyoda, Akira Tokai, Keiichi Betsui, Akihiro Otsuka
  • Publication number: 20010040433
    Abstract: Local losses of material of transparent electrodes, in a plasma display panel including transparent electrodes, bus electrodes and, a dielectric layer covering these electrodes, are prevented by using a plasma display panel according to the present invention. The plasma display panel is formed on at least one substrate of a pair of substrates provided opposite each other via a discharge space. An element, which is a main element of the bus electrode composition, is included in the composition of the dielectric layer. Since the main element of the bus electrode is included in the dielectric layer, local losses of the transparent electrode can be prevented even through the high temperature baking process of the dielectric layer. A preferred choice as the main element of the bus electrode composition is copper, but other elements are also suitable and will perform acceptably.
    Type: Application
    Filed: July 25, 2001
    Publication date: November 15, 2001
    Applicant: FUJITSU LIMITED
    Inventors: Noriyuki Awaji, Shinji Tadaki, Keiichi Betsui
  • Publication number: 20010028216
    Abstract: A display device is realized that has a group of elongated illuminators that enable the electrode matrix to be formed easily. The 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 illuminator in the width direction. The elongated electrode supporter has plural electrodes that are arranged along the longitudinal direction of the illuminator. A wiring conductive pattern is formed on the substrate for supplying electricity to the plural electrodes of the electrode supporter. A partial light emission of the illuminator is controlled by the wiring conductive pattern and the plural electrodes.
    Type: Application
    Filed: December 5, 2000
    Publication date: October 11, 2001
    Inventors: Akira Tokai, Manabu Ishimoto, Tutae Shinoda, Keiichi Betsui
  • Patent number: 6296539
    Abstract: The present invention relates to a plasma display panel comprising transparent electrodes and a dielectric layer covering said transparent electrodes on at least one substrate of a pair of substrates facing each other with a discharge space therebetween, the main constituent of the transparent electrodes is included in the dielectric layer. Further, the main constituent of the transparent electrode is indium oxide and indium oxide is included in the dielectric layer. By including the main constituent of the transparent electrodes in the dielectric layer, it is believed that the drop in conductivity caused by diffusion of the dielectric substance in the transparent electrodes during high-temperature processing is prevented.
    Type: Grant
    Filed: January 24, 2000
    Date of Patent: October 2, 2001
    Assignee: Fujitsu Limited
    Inventors: Noriyuki Awaji, Keiichi Betsui, Shinji Tadaki
  • Publication number: 20010008825
    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: Application
    Filed: January 29, 2001
    Publication date: July 19, 2001
    Inventors: Osamu Toyoda, Shinji Tadaki, Akira Tokai, Keiichi Betsui