Patents by Inventor Sukekazu Aratani

Sukekazu Aratani 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: 6896979
    Abstract: The present invention provides a film for use in organic EL device, having a sufficient gas-barrier property for protection of organic EL device, and an organic EL device structure using such a film. That is, the present invention provides a film for use in organic EL device, made of an organic inorganic hybrid material whose molecules have an organic skeletal moiety and an inorganic skeletal moiety and contain fluorine group and siloxane group.
    Type: Grant
    Filed: August 19, 2003
    Date of Patent: May 24, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Yuichi Sawai, Tomoji Oishi, Yoshiyuki Kaneko, Sukekazu Aratani
  • Patent number: 6864638
    Abstract: A scanning line, signal line, first current supply line, and second current supply line are formed on a glass substrate. A first electrode is formed thereon; and, an organic layer, including a hole transport layer, light-emitting layer, electron transport layer, and electron injection layer is formed on the first electrode. A second electrode is formed as a cathode on the electron injection layer. The first electrode, serving as an anode, is connected to a plus terminal of a power source through driving devices and first current supply line, whereas the second electrode is connected to a minus terminal of the power source and is connected to the second current supply line in the display region of each pixel, with a contact hole serving as a feeding point, whereby the wiring resistance of the second electrode is reduced, and variations in the brightness of the panel is reduced.
    Type: Grant
    Filed: December 31, 2002
    Date of Patent: March 8, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Shingo Ishihara, Takayuki Ouchi, Toshiro Mikami, Kazuhito Masuda, Sukekazu Aratani
  • Patent number: 6849128
    Abstract: A device for producing a color filter includes a part for storing a solution in which a light transmitting material is dissolved, a part for feeding the solution to a tip of a flying electrode, a part for applying a voltage between the tip of the flying electrode and an electro-conductive material of a color filter substrate so as to form an electrostatic field, and a part for relatively shifting the tip of the flying electrode and the color filter substrate with respect to one another in at least one of a perpendicular direction and to a horizontal direction. The solution is formed into a stringy beam which is let to fly onto the color filter substrate so that the solution is injected into a concavity formed and surrounded by a black matrix on the color filter substrate, arid forms red, green and blue light emitting layers.
    Type: Grant
    Filed: June 3, 2003
    Date of Patent: February 1, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Seiji Yonekura, Yoshinobu Fukano, Mamoru Okano, Yasuo Imanishi, Sukekazu Aratani, Yoshiharu Nagae
  • Patent number: 6833898
    Abstract: A liquid crystal display apparatus having a pair of substrates and a liquid crystal layer interposed between the pair of substrates. One of the pair of substrates has an electrode structure including a plurality of pixel electrodes and a plurality of common electrodes, an inorganic film is formed on a surface of at least one of the plurality of pixel electrodes and the plurality of common electrodes, an organic polymer film is formed on the inorganic film and the liquid crystal layer is in direct contact with the organic polymer film.
    Type: Grant
    Filed: November 5, 2002
    Date of Patent: December 21, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Sukekazu Aratani, Yoshiyuki Umeda, Yasushi Tomioka, Hisao Yokokura, Katsumi Kondo, Setsuo Kobayashi
  • Patent number: 6831724
    Abstract: An active matrix liquid crystal display device having first and second substrates, a liquid crystal layer disposed between the first and second substrates, plural image signal lines and scan signal lines being formed on the substrate and each pixel region being formed by adjacent image signal lines and adjacent scan signal lines having at least an active device. At least a pixel electrode is connected to the active device and at least a counter electrode in each pixel, and the pixel electrode and the counter electrode are provided on the first substrate. A first alignment film is formed over the pixel electrode and counter electrode on the first substrate at least in a pixel forming region, and a second alignment film is formed on the second substrate at least in the pixel forming region. Rubbing directions of the first and second alignment films are substantially parallel to each other.
    Type: Grant
    Filed: March 13, 2001
    Date of Patent: December 14, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Masuyuki Ohta, Kazuhiro Ogawa, Keiichiro Ashizawa, Kazuhiko Yanagawa, Masahiro Yanai, Nobutake Konishi, Nobuyuki Suzuki, Masahiro Ishii, Makoto Yoneya, Sukekazu Aratani
  • Publication number: 20040233377
    Abstract: A liquid crystal display device having a pair of substrates, a liquid crystal layer, a group of electrodes for applying to the liquid crystal layer an electric field substantially parallel to the substrate surface, and a plurality of active elements connected to the electrodes, the group of electrodes and active elements being formed on one of the pair of substrates. An alignment control film is formed between the liquid crystal layer and at least one of the pair of substrates and is made from polyamic acid obtained by reacting a diamine with an acid anhydride.
    Type: Application
    Filed: June 24, 2004
    Publication date: November 25, 2004
    Inventors: Yuka Utsumi, Yasushi Tomioka, Masatoshi Wakagi, Yasunari Maekawa, Sukekazu Aratani, Katsumi Kondo, Shigeru Matsuyama
  • Publication number: 20040196219
    Abstract: Pixels in a picture image display device are driven in such a manner that while introducing light, a quenching period is initiated in which electro optical elements in the pixels are quenched after scanning a plurality of gate lines for displaying one picture image. In other words, the pixels are driven while interposing the light quenching period in which the electro optical elements are quenched between one frame and a subsequent frame. Thereby, the phenomenon of blurred edges at the time of motion picture display, when the pixels including the electro optical elements are driven through an active matrix drive circuit, is suppressed and the picture quality of the picture image display device is improved.
    Type: Application
    Filed: April 12, 2004
    Publication date: October 7, 2004
    Inventors: Yoshiyuki Kaneko, Sukekazu Aratani
  • Publication number: 20040189167
    Abstract: Light-emitting devices and light-emitting displays for realizing bright display by allowing light emitted from an emissive layer to efficiently contribute to a display. Polarization separators are arranged between the emissive layer and a phase plate. In the light of a wavelength range which includes a part or all of a light-emission wavelength range of the emissive layer and is narrower than a visible wavelength range and is directed from the emissive layer side to the polarization separators side, the polarization separators reflect circularly polarized light components which are converted into linearly polarized light that is absorbed by the polarizer due to the operation of the phase plate and transmit the other light.
    Type: Application
    Filed: April 1, 2004
    Publication date: September 30, 2004
    Inventors: Masaya Adachi, Yoshiyuki Kaneko, Sukekazu Aratani, Shingo Ishihara
  • Patent number: 6776844
    Abstract: A production device to produce an organic EL display includes a solution in which a light emitting material is dissolved, and a flying electrode to receive solution from the container. A voltage is applied between the tip of the flying electrode and an electrically conductive material of an organic EL substrate to form an electrostatic field, and the tip of the flying electrode and the organic EL substrate are shifted relative to one another in at least one of a perpendicular direction and a horizontal direction. With this arrangement, the solution is formed into a stringy beam from the tip of the flying electrode to it fly onto the organic EL, substrate, thereby injecting the solution into a concavity formed and surrounded by banks on the organic EL substrate, and forming red, green and blue light emitting layers.
    Type: Grant
    Filed: March 26, 2002
    Date of Patent: August 17, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Seiji Yonekura, Yoshinobu Fukano, Mamoru Okano, Yasuo Imanishi, Sukekazu Aratani, Yoshiharu Nagae
  • Publication number: 20040155222
    Abstract: A liquid crystal display device having a pair of substrates, a liquid crystal layer filled between the pair of substrates and a plurality of pixel electrodes and common electrodes formed on one of the pair of substrates for supplying an electric field to the liquid crystal layer. The liquid crystal display device is configured so that a response time between a lowest brightness level and a highest brightness level is less than 16.7 ms, and the liquid crystal layer contains a range of 40% or more weight percentage to 100% or less weight percentage of a constituent component with a dielectric anisotropy of &Dgr;&egr;≧1.
    Type: Application
    Filed: February 6, 2004
    Publication date: August 12, 2004
    Inventors: Hiroyuki Kagawa, Shintaro Takeda, Kotaro Araya, Sukekazu Aratani, Katsumi Kondo
  • Publication number: 20040137658
    Abstract: The present invention provides the following methods and displays. A method for manufacturing an EL display panel, having the step of forming a light-emitting layer by irradiating light on a photothermal conversion layer through a transparent base member while a dye layer of a transfer member having the transparent base member, the photothermal conversion layer and this fluorescent dye layer is kept in close contact with an object to which the dye is to be transferred, the transparent base member, the photothermal conversion layer and the transfer member being laminated in this order, so that the dye can be transferred to the object. An EL display panel produced according to this method, an image display having this panel, and a method for manufacturing the image display.
    Type: Application
    Filed: March 11, 2004
    Publication date: July 15, 2004
    Inventors: Sukekazu Aratani, Yoshiyuki Kaneko, Makoto Tsunmura
  • Publication number: 20040125062
    Abstract: A liquid crystal display apparatus is able to display high quality motion pictures with less after-image when displaying motion pictures and with less fuzzy images without making the response speed of the liquid crystal too fast. The display data emphasized excessively more than a changed value is written into the pixel having any change detected by comparison with the previous display data and its value is made to change excessively more than the value corresponding to its original display data, and then, according to the optical response of the liquid crystal, the lighting time and the lighting period of the light source are controlled for the individual areas of the illumination unit having plural areas.
    Type: Application
    Filed: December 16, 2003
    Publication date: July 1, 2004
    Inventors: Tsunenori Yamamoto, Sukekazu Aratani, Makoto Yoneya
  • Patent number: 6757044
    Abstract: A normally closed liquid crystal display device using an in-plane switching mode prevented from light leakage caused by spacer beads and having a high contrast ratio can be produced by making a pretilt angle between an alignment control film and liquid crystals 4° or less and controlling a light leakage centering the spacer in 4-divided shapes; or by placing a film provided with a liquid crystal alignment controlling function by irradiation with polarized light between the spacer and a liquid crystal layer, the spacer being present in a pair of substrates.
    Type: Grant
    Filed: July 8, 2002
    Date of Patent: June 29, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Yuka Utsumi, Yasushi Tomioka, Masatoshi Wakagi, Yasunari Maekawa, Sukekazu Aratani, Katsumi Kondo, Shigeru Matsuama
  • Publication number: 20040109103
    Abstract: In a liquid crystal display device capable of realizing a viewing angle equivalent to the Braun tube and for controlling display with an electric field in parallel with a substrate surface, a liquid crystal display device is provided which is less in unevenness of display and homogeneous in luminance.
    Type: Application
    Filed: June 17, 2003
    Publication date: June 10, 2004
    Applicant: Hitachi, Ltd.
    Inventors: Masuyuki Ota, Sukekazu Aratani, Makoto Yoneya
  • Patent number: 6738034
    Abstract: Pixels in a picture image display device are driven in such a manner that while introducing light, a quenching period is initiated in which electro optical elements in the pixels are quenched after scanning a plurality of gate lines for displaying one picture image. In other words, the pixels are driven while interposing the light quenching period in which the electro optical elements are quenched between one frame and a subsequent frame. Thereby, the phenomenon of blurred edges at the time of motion picture display, when the pixels including the electro optical elements are driven through an active matrix drive circuit, is suppressed and the picture quality of the picture image display device is improved.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: May 18, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Yoshiyuki Kaneko, Sukekazu Aratani
  • Publication number: 20040053070
    Abstract: The present invention provides a film for use in organic EL device, having a sufficient gas-barrier property for protection of organic EL device, and an organic EL device structure using such a film. That is, the present invention provides a film for use in organic EL device, made of an organic inorganic hybrid material whose molecules have an organic skeletal moiety and an inorganic skeletal moiety and contain fluorine group and siloxane group.
    Type: Application
    Filed: August 19, 2003
    Publication date: March 18, 2004
    Inventors: Yuichi Sawai, Tomoji Oishi, Yoshiyuki Kaneko, Sukekazu Aratani
  • Publication number: 20040032384
    Abstract: An active matrix liquid crystal display device having a pair of substrates, a liquid crystal layer, scanning lines and video signal lines provided in a matrix manner, and a pair of pixel electrodes, at least one of the pixel electrodes being connected to a common electrode. At least one of the pixel electrodes is bent so as to be inclined in first and second directions which are symmetrical relative to the alignment direction of the liquid crystal. The first direction of the pixel electrodes is at a plus predetermined angle relative to the alignment direction, while the second direction of the pixel electrodes is at a minus predetermined angle relative to the alignment direction.
    Type: Application
    Filed: August 11, 2003
    Publication date: February 19, 2004
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann
  • Publication number: 20030201550
    Abstract: A device for producing a color filter includes a part for storing a solution in which a light transmitting material is dissolved, a part for feeding the solution to a tip of a flying electrode, a part for applying a voltage between the tip of the flying electrode and an electro-conductive material of a color filter substrate so as to form an electrostatic field, and a part for relatively shifting the tip of the flying electrode and the color filter substrate to a perpendicular direction and to a horizontal direction. The solution is formed into a stringy beam which is let to fly onto the color filter substrate so that the solution is injected into a concavity formed and surrounded by a black matrix on the color filter substrate, and forms red, green and blue light emitting layers.
    Type: Application
    Filed: June 3, 2003
    Publication date: October 30, 2003
    Inventors: Seiji Yonekura, Yoshinobu Fukano, Mamoru Okano, Yasuo Imanishi, Sukekazu Aratani, Yoshiharu Nagae
  • Patent number: 6638645
    Abstract: The present invention provides a film for use in organic EL device, having a sufficient gas-barrier property for protection of organic EL device, and an organic EL device structure using such a film. That is, the present invention provides a film for use in organic EL device, made of an organic inorganic hybrid material whose molecules have an organic skeletal moiety and an inorganic skeletal moiety and contain fluorine group and siloxane group.
    Type: Grant
    Filed: September 17, 2001
    Date of Patent: October 28, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Yuichi Sawai, Tomoji Oishi, Yoshiyuki Kaneko, Sukekazu Aratani
  • Publication number: 20030184698
    Abstract: A liquid crystal display device includes a pair of substrates sandwiching of a liquid crystal layer, plural scanning signal lines and plural video signal lines formed on one of the pair of substrates, and plural pixel regions formed as an area surrounded by an adjacent two of the plural scanning signal lines and an adjacent two of the plural video signal lines. At least a pixel electrode is formed on the one of the pair of substrates in each of the pixel regions, a plurality of counter electrodes is formed on one of the pair of substrates in each of the pixel regions, and at least a counter voltage signal line connects the counter electrodes formed on one of the pair of substrates. The counter voltage signal line is arranged in an overlapping relation with at least one of the scanning signal lines in plan view.
    Type: Application
    Filed: March 28, 2003
    Publication date: October 2, 2003
    Inventors: Masuyuki Ohta, Kazuhiko Yanagawa, Kazuhiro Ogawa, Keiichiro Ashizawa, Masahiro Yanai, Nobutake Konishi, Katsumi Kondo, Masahito Ohe, Sukekazu Aratani, Hagen Klausmann