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: 20150328870
    Abstract: A method and an apparatus for manufacturing an optical display device by sequentially peeling a plurality of optical film sheets continuously supported on a long web of a carrier film and laminating the plurality of optical film sheets to a plurality of panel components are provided.
    Type: Application
    Filed: September 30, 2013
    Publication date: November 19, 2015
    Applicant: NITTO DENKO CORPORATION
    Inventors: Tomokazu YURA, Kazuo KITADA, Satoru KOSHIO, Takuya NAKAZONO
  • Patent number: 9151982
    Abstract: A manufacturing system is provided with a supplying apparatus of a first sheet material supplying after cutting into a predetermined length, and a supplying apparatus of a second sheet material supplying after cutting into a predetermined length, and the supplying apparatus of the first sheet material and the supplying apparatus of the second sheet material are structured such that one supplying apparatus cuts a long sheet material having a width corresponding to a short side into a length corresponding to a long side, and the other supplying apparatus cuts a long sheet material having a width corresponding to the long side into a length corresponding to the short side, in correspondence to the long side and the short side of the optical display unit.
    Type: Grant
    Filed: April 4, 2012
    Date of Patent: October 6, 2015
    Assignee: NITTO DENKO CORPORATION
    Inventors: Kazuo Kitada, Tomokazu Yura, Satoru Koshio, Takuya Nakazono
  • Patent number: 9138949
    Abstract: It is provided that a method and a system for manufacturing an optical display device, which make it possible to bond an optical member and an optical display unit together with a certain degree of cleanliness maintained. The method for manufacturing an optical display device including an optical display unit (W) and an optical member (11, 12) bonded to the optical display unit (W), which includes a bonding step for bonding the optical member (11, 12) to the optical display unit (W) in an environment with an airflow.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: September 22, 2015
    Assignee: NITTO DENKO CORPORATION
    Inventors: Kazuo Kitada, Satoru Koshio, Takuya Nakazono, Tomokazu Yura
  • Publication number: 20150234096
    Abstract: A method for manufacturing an optical display device comprising: after completing lamination of a preceding optical film sheet to one of opposite surfaces of a preceding panel component at the predetermined laminating position, unwinding the carrier film in a state where another surface thereof folded to inside at a tip-end configuring a head portion of a peeling member and the carrier film is passed around the peeling member, and backwardly feeding a leading end of the optical film sheet supported on the carrier film to a predetermined feeding position provided at upstream of the tip-end of the peeling member.
    Type: Application
    Filed: September 30, 2013
    Publication date: August 20, 2015
    Applicant: NITTO DENKO CORPORATION
    Inventors: Tomokazu Yura, Satoru Koshio, Kazuo Kitada, Takuya Nakazono
  • Patent number: 9017504
    Abstract: A system for manufacturing an optical display device includes providing a roll of a belt-shaped sheet material including an optical film and a release film, which has score lines previously formed by cutting layers of the material other than the release film. The optical film is bonded to a rectangular optical display unit of the display device. In the bonding steps, a first optical film is divided by the score lines into pieces each having a length corresponding to a long side of the display unit, and a second optical film is divided by the score lines into pieces each having a length corresponding to a short side of the display unit. The first optical film has a first polarizing plate whose longitudinal direction is parallel to its absorption axis, and the second optical film has a second polarizing plate whose longitudinal direction is parallel to its absorption axis.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: April 28, 2015
    Assignee: Nitto Denko Corporation
    Inventors: Kazuo Kitada, Tomokazu Yura, Satoru Koshio, Takuya Nakazono
  • Patent number: 8985176
    Abstract: A system for manufacturing an optical display device includes providing a roll of a belt-shaped sheet material including an optical film and a release film, which has score lines previously formed by cutting layers of the material other than the release film. The optical film is bonded to a rectangular optical display unit of the display device. In the bonding steps, a first optical film is divided by the score lines into pieces each having a length corresponding to a long side of the display unit, and a second optical film is divided by the score lines into pieces each having a length corresponding to a short side of the display unit. The first optical film has a first polarizing plate whose longitudinal direction is parallel to its absorption axis, and the second optical film has a second polarizing plate whose longitudinal direction is parallel to its absorption axis.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: March 24, 2015
    Assignee: Nitto Denko Corporation
    Inventors: Kazuo Kitada, Tomokazu Yura, Satoru Koshio, Takuya Nakazono
  • Patent number: 8936692
    Abstract: Provided is an optical functional film in which air bubbles can be effectively prevented from forming during lamination, and preferably in which a carrier film does not tear readily. Also provided is a method for manufacturing a liquid crystal display device using this optical functional film. A belt-shaped optical functional film is used in order to cut away the optical functional film at predetermined intervals from the belt-shaped optical functional film to which a carrier film is bonded, with the carrier film remaining uncut; to subsequently turn over the carrier film by an edge-shaped member and peel away the optical functional film; and to laminate the exposed surface of the optical functional film to a sheet member while the optical functional film is being peeled away, wherein the optical functional film is characterized in that the flexural rigidity of the carrier film per unit length in the longitudinal direction is from 5.0×10?5 N·mm2 to 8.
    Type: Grant
    Filed: August 23, 2011
    Date of Patent: January 20, 2015
    Assignee: Nitto Denko Corporation
    Inventors: Satoshi Hirata, Kazuo Kitada, Tomokazu Yura, Satoru Koshio, Takuya Nakazono
  • Patent number: 8915281
    Abstract: Provided is a system for manufacturing an optical display unit and a feed mechanism, which can well prevent an optical film and a pressure-sensitive adhesive layer from being peeled from a release film. A pressure-sensitive adhesive type sheet material, wherein the optical film and the pressure-sensitive adhesive layer (film main body (F)) are cut without cutting a release film (F12, F22) which is laminated to the optical film with the pressure-sensitive adhesive layer in between, is fed along a feed path (12A, 22A). A press member (200) is arranged at a position opposed to a bent portion or a curved portion in the feed path (12A, 22A). Since the film main body (F) which is peeled from the release film (F12, F22) can be pressed to the release film (F12, F22) by the press member (200), the film main body (F) can be well prevented from being peeled from the release film (F12, F22).
    Type: Grant
    Filed: January 7, 2009
    Date of Patent: December 23, 2014
    Assignee: Nitto Denko Corporation
    Inventors: Kazuo Kitada, Takuya Nakazono, Satoru Koshio, Tomokazu Yura
  • Publication number: 20140360992
    Abstract: An impact-absorbing pressure-sensitive adhesive sheet according to an embodiment of the present invention includes an impact-absorbing pressure-sensitive adhesive layer including an impact-absorbing layer. A side surface of the impact-absorbing pressure-sensitive adhesive layer includes a tapered surface; and the tapered surface has a taper angle of 65° or more.
    Type: Application
    Filed: August 27, 2014
    Publication date: December 11, 2014
    Applicant: NITTO DENKO CORPORATION
    Inventors: Tomonori Noguchi, Atsushi Hino, Kanji Nishida, Kazuo Kitada, Takaichi Amano
  • Publication number: 20140290826
    Abstract: A method for manufacturing an LCD panel comprises: (a) continuously feeding an LC cell comprising first and second substrates, the first substrate being relatively less susceptible to electrostatic decay than the second substrate, (b) laminating a first polarizing plate to the first substrate of the LC cell while avoiding direct contact between the first laminating member and the first substrate; (c) laminating a second polarizing plate to the second substrate with the first substrate being in contact with a second laminating member through the first polarizing plate laminated to the first substrate in the step (b) while avoiding direct contact between the second laminating member and the first substrate, thereby obtaining an LCD panel, and (d) conducting an inspection of the LCD panel without applying voltage, wherein steps (a), (b), (c) and (d) are performed sequentially in a single continuous feed line.
    Type: Application
    Filed: June 18, 2014
    Publication date: October 2, 2014
    Applicant: NITTO DENKO CORPORATION
    Inventors: Satoru Koshio, Kazuo Kitada, Tomokazu Yura, Takuya Nakazono, Masahiro Takigawa
  • Patent number: 8846197
    Abstract: An impact-absorbing pressure-sensitive adhesive sheet according to an embodiment of the present invention includes an impact-absorbing pressure-sensitive adhesive layer including an impact-absorbing layer. A side surface of the impact-absorbing pressure-sensitive adhesive layer includes a tapered surface; and the tapered surface has a taper angle of 65° or more.
    Type: Grant
    Filed: August 2, 2007
    Date of Patent: September 30, 2014
    Assignee: Nitto Denko Corporation
    Inventors: Tomonori Noguchi, Atsushi Hino, Kanji Nishida, Kazuo Kitada, Takaichi Amano
  • Patent number: 8817373
    Abstract: An end face of a polarization plate cut by laser becomes a substantially flat surface having only sloping micro waviness because of having been melted once to be solidified. Since the surface has few stress-concentrated parts that may cause microcracks, this prevents microcracks from easily being produced.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: August 26, 2014
    Assignee: Nitto Denko Corporation
    Inventors: Kanto Kobayashi, Kanji Nishida, Naoki Tomoguchi, Youichirou Sugino, Takaichi Amano, Kazuo Kitada
  • Patent number: 8709181
    Abstract: The invention provides a method for manufacturing an optical display device including an optical display unit and an optical film that includes a polarizing plate and is bonded to the optical display unit.
    Type: Grant
    Filed: April 14, 2009
    Date of Patent: April 29, 2014
    Assignee: Nitto Denko Corporation
    Inventors: Kazuo Kitada, Takuya Nakazono, Satoru Koshio, Tomokazu Yura
  • Patent number: 8657976
    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: Grant
    Filed: April 30, 2012
    Date of Patent: February 25, 2014
    Assignee: Nitto Denko Corporation
    Inventors: Kouji Kimura, Takayoshi Yamano, Takuya Nakazono, Kazuo Kitada, Tomokazu Yura, Fumihito Shimanoe, Satoru Koshio, Shouji Shibata
  • Patent number: 8603283
    Abstract: It is provided that a method and a system for manufacturing an optical display device, which make it possible to bond an optical member and an optical display unit together with a certain degree of cleanliness maintained. The method for manufacturing an optical display device including an optical display unit (W) and an optical member (11, 12) bonded to the optical display unit (W), which includes a bonding step for bonding the optical member (11, 12) to the optical display unit (W) in an environment with an airflow.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: December 10, 2013
    Assignee: Nitto Denko Corporation
    Inventors: Kazuo Kitada, Satoru Koshio, Takuya Nakazono, Tomokazu Yura
  • Publication number: 20130292058
    Abstract: It is provided that a method and a system for manufacturing an optical display device, which make it possible to bond an optical member and an optical display unit together with a certain degree of cleanliness maintained. The method for manufacturing an optical display device including an optical display unit(W) and an optical member(11, 12) bonded to the optical display unit(W), which includes a bonding step for bonding the optical member(11, 12) to the optical display unit(W) in an environment with an airflow.
    Type: Application
    Filed: July 11, 2013
    Publication date: November 7, 2013
    Inventors: Kazuo Kitada, Satoru Koshio, Takuya Nakazono, Tomokazu Yura
  • Patent number: 8557069
    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: Grant
    Filed: April 10, 2009
    Date of Patent: October 15, 2013
    Assignee: Nitto Denko Corporation
    Inventors: Kazuo Kitada, Tomokazu Yura, Satoru Koshio, Takuya Nakazono
  • Patent number: 8500937
    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: Grant
    Filed: November 22, 2010
    Date of Patent: August 6, 2013
    Assignee: Nitto Denko Corporation
    Inventors: Kazuo Kitada, Satoru Koshio, Takuya Nakazono, Tomokazu Yura
  • Patent number: 8491737
    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: Grant
    Filed: April 30, 2012
    Date of Patent: July 23, 2013
    Assignee: Nitto Denko Corporation
    Inventors: Kouji Kimura, Takayoshi Yamano, Takuya Nakazono, Kazuo Kitada, Tomokazu Yura, Fumihito Shimanoe, Satoru Koshio, Shouji Shibata
  • Publication number: 20130126080
    Abstract: Provided is an optical functional film in which air bubbles can be effectively prevented from forming during lamination, and preferably in which a carrier film does not tear readily. Also provided is a method for manufacturing a liquid crystal display device using this optical functional film. A belt-shaped optical functional film is used in order to cut away the optical functional film at predetermined intervals from the belt-shaped optical functional film to which a carrier film is bonded, with the carrier film remaining uncut; to subsequently turn over the carrier film by an edge-shaped member and peel away the optical functional film; and to laminate the exposed surface of the optical functional film to a sheet member while the optical functional film is being peeled away, wherein the optical functional film is characterized in that the flexural rigidity of the carrier film per unit length in the longitudinal direction is from 5.0×10?5 N·mm2 to 8.
    Type: Application
    Filed: August 23, 2011
    Publication date: May 23, 2013
    Applicant: NITTO DENKO CORPORATION
    Inventors: Satoshi Hirata, Kazuo Kitada, Tomokazu Yura, Satoru Koshio, Takuya Nakazono