Patents by Inventor Kazuo Kitada

Kazuo Kitada 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: 20110111667
    Abstract: There are provided a system and a method for manufacturing an optical display device, in which optical films fed from two rolls which are the same in the direction of optical anisotropy, such as the direction of absorption axis, can be bonded to one and the other surfaces of an optical display unit so that the optical anisotropy of the one can be orthogonal to that of the other.
    Type: Application
    Filed: May 6, 2010
    Publication date: May 12, 2011
    Applicant: NITTO DENKO CORPORATION
    Inventors: Kazuo Kitada, Tomokazu Yura, Satoru Koshio, Takuya Nakazono
  • Publication number: 20110104423
    Abstract: There are provided a system and a method for manufacturing an optical display device, in which optical films fed from two rolls which are the same in the direction of optical anisotropy, such as the direction of absorption axis, can be bonded to one and the other surfaces of an optical display unit so that the optical anisotropy of the one can be orthogonal to that of the other, and a set of material rolls and a method for manufacture thereof. A first optical film F11 with a width corresponding to the short side of an optical display unit W has score lines that are previously formed so that the first optical film F11 can be divided by the score lines into pieces each having a length corresponding to the long side of the optical display unit W.
    Type: Application
    Filed: May 12, 2010
    Publication date: May 5, 2011
    Applicant: NITTO DENKO CORPORATION
    Inventors: Kazuo Kitada, Tomokazu Yura, Satoru Koshio, Takuya Nakazono
  • Publication number: 20110085125
    Abstract: An information storage/readout device for use in a system for continuously manufacturing liquid-crystal display elements comprises an information storage medium which stores therein slitting position information created based on the position of a defect detected by an inspection of a continuous polarizing composite film included in a continuous optical film laminate including a continuous polarizing composite film formed with an adhesive layer and a continuous carrier film releasably laminated on the adhesive layer, to indicate defective-polarizing-sheet slitting positions defining a defective or defect-containing polarizing sheet, and normal-polarizing-sheet slitting positions defining a normal or defect-free polarizing sheet, in the continuous inspected optical film laminate, and a roll of the continuous inspected optical film laminate which is provided with an identification indicia.
    Type: Application
    Filed: October 13, 2010
    Publication date: April 14, 2011
    Applicant: NITTO DENKO CORPORATION
    Inventors: Kouji KIMURA, Kazuo KITADA, Tomokazu YURA, Satoru KOSHIO, Fumihito SHIMANOE, Takuya NAKAZONO
  • Publication number: 20110083790
    Abstract: A method for continuously manufacturing liquid-crystal display elements includes steps of; continuously feeding an optical film laminate, calculating a length measurement data based on the feed length of the optical film laminate, detecting a mark provided to the optical film laminate indicating defect information in a polarizing composite film being detected in a preliminary inspection, sequentially forming slit lines in a transverse direction with respect to the feed direction of the optical film laminate, determining the polarizing composite film sheet separated by the respective slit lines is a defective polarizing sheet or a normal polarizing sheet, peeling a sheet determined to be a normal polarizing sheet from the carrier film, and laminating the normal polarizing sheet to a respective one of liquid-crystal panel.
    Type: Application
    Filed: October 13, 2010
    Publication date: April 14, 2011
    Applicant: NITTO DENKO CORPORATION
    Inventors: Kouji KIMURA, Kazuo KITADA, Fumihito SHIMANOE, Tomokazu YURA, Satoru KOSHIO, Takuya NAKAZONO, Teruaki OSAWA
  • Publication number: 20110083789
    Abstract: A method and a system for continuously manufacturing liquid-crystal display elements, using a continuous optical film laminate which comprises at least an optically functional film having an adhesive layer provided thereon and a carrier film releasably laminated on said adhesive layer, the optically functional film including at least one defect-free region and at least one defect-containing region, the defect-free region having a predefined length corresponding to a dimension of a liquid-crystal panel, the defect-containing region including at least one defect and defined as a region having a predefined length which is different from the length of the defect-free region, slit lines being sequentially formed to extend in a transverse direction of the optical film laminate to form defect-free, normal optically functional film sheets and defect-containing optically functional film sheets.
    Type: Application
    Filed: October 12, 2010
    Publication date: April 14, 2011
    Applicant: NITTO DENKO CORPORATION
    Inventors: Takuya NAKAZONO, Kazuo KITADA, Tomokazu YURA, Satoru KOSHIO, Shouji SHIBATA
  • Patent number: 7922843
    Abstract: A strip-shaped polarizing film has a protective film strip conformably adhered to one surface thereof and a releasable liner conformably adhered to the other surface thereof and delivered from a film delivering station 1. After an appearance inspection, a lamination of the protective film strip and the polarizing film strip F is half-cut using a laser unit 11 to form an array of laminations each consisting of a protective film and a polarizing film F, with the releasable liner being left intact. Then, the polarizing films F are fed to a peeling mechanism 4. The peeling mechanism 4 feeds a forwardmost one the polarizing films F to a laminating mechanism 5 while peeling off the releasable liner therefrom by a knife-edged member. The forwardmost polarizing film F is laminated to a liquid-crystal panel W conveyed to the laminating mechanism by a panel transport apparatus 18 in synchronization of the feeding of the forwardmost polarizing film F.
    Type: Grant
    Filed: April 13, 2009
    Date of Patent: April 12, 2011
    Assignee: Nitto Denko Corporation
    Inventors: Kazuo Kitada, Yoshihiro Kameda, Kanji Nishida, Tomokazu Yura, Takaichi Amano, Hiromichi Ohashi, Atsushi Hino, Naoyuki Matsuo
  • Patent number: 7913734
    Abstract: A strip-shaped polarizing film has a protective film strip conformably adhered to one surface thereof and a releasable liner conformably adhered to the other surface thereof and delivered from a film delivering station 1. After an appearance inspection, a lamination of the protective film strip and the polarizing film strip F is half-cut using a laser unit 11 to form an array of laminations each consisting of a protective film and a polarizing film F, with the releasable liner being left intact. Then, the polarizing films F are fed to a peeling mechanism 4. The peeling mechanism 4 feeds a forwardmost one the polarizing films F to a laminating mechanism 5 while peeling off the releasable liner therefrom by a knife-edged member. The forwardmost polarizing film F is laminated to a liquid-crystal panel W conveyed to the laminating mechanism by a panel transport apparatus 18 in synchronization of the feeding of the forwardmost polarizing film F.
    Type: Grant
    Filed: July 26, 2010
    Date of Patent: March 29, 2011
    Assignee: Nitto Denko Corporation
    Inventors: Kazuo Kitada, Yoshihiro Kameda, Kanji Nishida, Tomokazu Yura, Takaichi Amano, Hiromichi Ohashi, Atsushi Hino, Naoyuki Matsuo
  • Publication number: 20110061801
    Abstract: A manufacturing system of an optical display device in which the following can be attained in the case of bonding optical members to optical display units, respectively: an optical member to be excluded, which is, for example, an optical member judged as a defective member, can be appropriately excluded so that the optical member is not bonded onto any optical display unit and a manufacturing method of an optical display device.
    Type: Application
    Filed: November 22, 2010
    Publication date: March 17, 2011
    Applicant: NITTO DENKO CORPORATION
    Inventors: Kazuo KITADA, Satoru Koshio, Takuya Nakazono, Tomokazu Yura
  • Publication number: 20110047775
    Abstract: A processing speed of each mechanisms in a cutting section is controlled such that all polarizing films housed in a container in advance are used in a joining process and simultaneously a new container with polarizing films housed therein that are cut by a size of a liquid crystal panel is loaded from the cutting section. Here, a fracture included in the polarizing film is cut and removed in the cutting section while a delayed time due to this process is shortened by controlling at least a processing speed in a processing mechanism in a cutting mechanism among mechanisms provided in the cutting section and the joining section.
    Type: Application
    Filed: April 6, 2009
    Publication date: March 3, 2011
    Inventors: Satoru Koshio, Kazuo Kitada, Tomokazu Yura, Takuya Nakazono
  • Publication number: 20110030884
    Abstract: Provided are a method and system for manufacturing optical display device that can make a previous category of an optical film remain less in the device at the exchange time of categories of optical films.
    Type: Application
    Filed: April 9, 2009
    Publication date: February 10, 2011
    Applicant: NITTO DENKO CORPORATION
    Inventors: Tomokazu Yura, Kazuo Kitada, Satoru Koshio, Takuya Nakazono
  • Publication number: 20110025958
    Abstract: Provided are an optical display device manufacturing system and a method for manufacturing an optical display device which can bond optical films to both surfaces of a liquid crystal cell in good condition with a simpler constitution. A first optical film F11 is fed in an orthogonal direction with respect to the width direction from a first material roll R1 formed by winding the first optical film F11 in such a manner that an absorption axis B1 extends in the orthogonal direction, and then the first optical film F11 is cut and bonded to one surface of a liquid crystal cell. A second optical film F21 is fed in an orthogonal direction with respect to the width direction from a second material roll R2 formed by winding the second optical film F21 in such a manner that an absorption axis B2 extends in the width direction, and then the second optical film F21 is cut and bonded to the other surface of the liquid crystal cell.
    Type: Application
    Filed: October 8, 2010
    Publication date: February 3, 2011
    Applicant: NITTO DENKO CORPORATION
    Inventors: Satoru Koshio, Takuya Nakazono, Kazuo Kitada, Tomokazu Yura, Kentarou Takeda
  • Publication number: 20110019274
    Abstract: An end face of a polarization plate 10 cut by laser according to the present invention becomes a substantially flat surface having only sloping micro waviness 16 because of having been melted once to be solidified. Since the surface has few stress-concentrated part that may cause microcracks, this prevents microcracks from easily being produced.
    Type: Application
    Filed: July 3, 2008
    Publication date: January 27, 2011
    Applicant: NITTO DENKO CORPORATION
    Inventors: Kanto Kobayashi, Kanji Nishida, Naoki Tomoguchi, Youichirou Sugino, Takaichi Amano, Kazuo Kitada
  • Publication number: 20110005656
    Abstract: Provided are an optical display device manufacturing system and an optical display device manufacturing method which can more preferably carry out a defect inspection. A detection condition of a defect in the inspection of an optical film before being bonded to an optical display unit carried out by a defect inspection apparatus (14, 24) is corrected based on the result of inspection of the optical display device with the optical film bonded, carried out by an inspection apparatus (30), and the optical film including the defects detected by the defect inspection apparatuses (14, 24) based on the corrected detection condition are excluded.
    Type: Application
    Filed: April 10, 2009
    Publication date: January 13, 2011
    Applicant: NITTO DENKO CORPORATION
    Inventors: Kazuo Kitada, Tomokazu Yura, Satoru Koshio, Takuya Nakazono
  • Publication number: 20100326589
    Abstract: An optical display device manufacturing system for bonding a first optical member to an optical display unit, comprising an excluding device for excluding a second optical member as an object to be excluded from a long release film that carries the first and second optical members, wherein the excluding device includes a tape member; a tape member rolling means on which the tape member is rolled; a roller for exclusion around which the tape member unrolled from the tape member rolling means is wound; a drive mechanism for shifting the roller for exclusion; and a take-up means for taking up the tape member wound around the roller for exclusion, wherein the excluding device being configured so that when the roller for exclusion is shifted, the second optical member is attached to the tape member and taken up.
    Type: Application
    Filed: April 7, 2009
    Publication date: December 30, 2010
    Applicant: NITTO DENKO CORPORATION
    Inventors: Satoru Koshio, Kazuo Kitada, Tomokazu Yura, Takuya Nakazono
  • Publication number: 20100316817
    Abstract: An optical film laminate that has predefined slit lines for enhancing both product accuracy and manufacturing speed in liquid-crystal display element manufacturing to radically improve manufacturing yield. The optical film laminate formed as a continuous web with the predefined slit lines for use in a continuous manufacturing system by laminating optically functional film sheets to liquid-crystal panels. The optical film laminate having defect-free regions having a predefined length corresponding to the dimension of a liquid-crystal panel and defective regions having a predefined length different from the defect-free region, based on the detected position of defects. The optical film laminate having a carrier film releasably laminated to an adhesive layer, wherein defect-free normal polarizing sheets and a defective polarizing sheets are formed on the carrier film by forming slit lines corresponding to above regions along the transverse direction of the optical film laminate.
    Type: Application
    Filed: August 3, 2010
    Publication date: December 16, 2010
    Applicant: NITTO DENKO CORPORATION
    Inventors: Kouji KIMURA, Takayoshi YAMANO, Takuya NAKAZONO, Kazuo KITADA, Tomokazu YURA, Fumihito SHIMANOE, Satoru KOSHIO, Shouji SHIBATA
  • Publication number: 20100300606
    Abstract: A set of material rolls is used for the process of bonding their pieces to both sides of an optical display unit, respectively, and includes: a first roll that is a roll of a long sheet material including a first optical film, a pressure-sensitive adhesive layer and a release film laminated in this order, wherein the first optical film includes a polarizing plate, and having undergone a slitting process in a direction parallel to the absorption axis of the polarizing plate so that it has a width corresponding to the short side of the optical display unit; and a second roll that is a roll of another long sheet material with a similar structure having undergone a slitting process in a direction parallel to the absorption axis of the polarizing plate so that it has a width corresponding to the long side of the optical display unit.
    Type: Application
    Filed: August 12, 2010
    Publication date: December 2, 2010
    Applicant: NITTO DENKO CORPORATION
    Inventors: Kazuo Kitada, Takuya Nakazono, Satoru Koshio, Tomokazu Yura
  • Publication number: 20100294418
    Abstract: Provided are a method of manufacturing an optical display unit and a manufacturing system of the optical display unit wherein in the case of sticking an optical film to an optical display substrate, a defective optical film is eliminated optimally and precision of the elimination can be confirmed.
    Type: Application
    Filed: January 27, 2009
    Publication date: November 25, 2010
    Applicant: NITTO DENKO CORPORATION
    Inventors: Tomokazu Yura, Kazuo Kitada, Satoru Koshio, Takuya Nakazono
  • Publication number: 20100288432
    Abstract: A manufacturing system of an optical display device in which the following can be attained in the case of bonding optical members to optical display units, respectively: an optical member to be excluded, which is, for example, an optical member judged as a defective member, can be appropriately excluded so that the optical member is not bonded onto any optical display unit and a manufacturing method of an optical display device.
    Type: Application
    Filed: December 24, 2008
    Publication date: November 18, 2010
    Applicant: NITTO DENKO CORPORATION
    Inventors: Kazuo Kitada, Satoru Koshio, Takuya Nakazono, Tomokazu Yura
  • Publication number: 20100288441
    Abstract: [Objects] To make it possible to carry out automatically and accurately a laminating operation of an optical element to a sheet-shaped body. [Means for Accomplishing the Objects] A strip-shaped polarizing film has a protective film strip conformably adhered to one surface thereof and a releasable liner conformably adhered to the other surface thereof and delivered from a film delivering station 1. After an appearance inspection, a lamination of the protective film strip and the polarizing film strip F is half-cut using a laser unit 11 to form an array of laminations each consisting of a protective film and a polarizing film F, with the releasable liner being left intact. Then, the polarizing films F are fed to a peeling mechanism 4. The peeling mechanism 4 feeds a forwardmost one the polarizing films F to a laminating mechanism 5 while peeling off the releasable liner therefrom by a knife-edged member.
    Type: Application
    Filed: July 26, 2010
    Publication date: November 18, 2010
    Applicant: NITTO DENKO CORPORATION
    Inventors: Kazuo KITADA, Yoshihiro KAMEDA, Kanji NISHIDA, Tomokazu YURA, Takaichi AMANO, Hiromichi OHASHI, Atsushi HINO, Naoyuki MATSUO
  • Publication number: 20100288420
    Abstract: A continuous manufacturing method and system for liquid-crystal display elements which enhances accuracy, increases speed and improves in yield in the continuous production of liquid crystal elements. The continuous method and system performs steps of, defining a plurality of defective and normal-polarizing-sheet slitting positions on a continuous web of optical film, based on positions of defects existing in the optical film, and applying only normal polarizing sheets to a liquid-crystal panel. The polarizing sheet includes the defective and normal-polarizing-sheet slitting positions recorded as encoded information which is used to determine whether the polarizing sheet defined between slit lines sequentially formed in the continuous web, is a normal polarizing sheet, peeling the normal polarizing sheet from the carrier film and applying the normal polarizing sheet to the liquid-crystal panel.
    Type: Application
    Filed: May 28, 2010
    Publication date: November 18, 2010
    Applicant: NITTO DENKO CORPORATION
    Inventors: Kouji KIMURA, Takayoshi YAMANO, Takuya NAKAZONO, Kazuo KITADA, Tomokazu YURA, Fumihito SHIMANOE, Satoru KOSHIO