Patents by Inventor Tatsuo Kanezawa

Tatsuo Kanezawa 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).

  • Liquid crystal display device and manfacturing method therefor
    Patent number: 5717476
    Abstract: In a liquid crystal display device, support columns are formed on the outside of a seal area in an edge area of opposing substrates, thus reducing substrate deformation and preventing the occurrence of air bubbles inside the liquid crystal layer, undesirable coloring of the display area, and color irregularity. Support columns 9 formed using a conductive ink are provided on the outside of seal material 6 used for sealing liquid crystal layer 5 contained between top substrate 1 and bottom substrate 2. The support columns 9 prevent the warping of substrates 1 and 2 caused by the shrinkage of mold material 8 during hardening, reducing the changes in the liquid crystal layer thickness. Support columns 9 are print-formed simultaneously with the conductive connection area of the liquid crystal panel, and are hardened simultaneously with the seal material.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: February 10, 1998
    Assignee: Seiko Epson Corporation
    Inventor: Tatsuo Kanezawa
  • Liquid crystal display device and manufacturing method thereof
    Patent number: 5657104
    Abstract: A liquid crystal display device is provided having a plurality of electrodes in electrical communication with a conduction portion of a plurality of external wirings. An external portion is in electrical communication with the plurality of electrodes and comprises a conduction layer having a predetermined thickness, the conduction layer being arranged in a predetermined pattern on the external portion and between the external wirings and the external portion.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: August 12, 1997
    Assignee: Seiko Epson Corporation
    Inventor: Tatsuo Kanezawa
  • Liquid crystal display device and manufacturing method thereof
    Patent number: RE37945
    Abstract: In a liquid crystal display device, support columns are formed on the outside of a seal area in an edge area of opposing substrates, thus reducing substrate deformation and preventing the occurrence of air bubbles inside the liquid crystal layer, undesirable coloring of the display area, and color irregularity. Support columns 9 formed using a conductive ink are provided on the outside of seal material 6 used for sealing liquid crystal layer 5 contained between top substrate 1 and bottom substrate 2. The support columns 9 prevent the warping of substrates 1 and 2 caused by the shrinkage of mold material 8 during hardening, reducing the changes in the liquid crystal layer thickness. Support columns 9 are print-formed simultaneously with the conductive connection area of the liquid crystal panel, and are hardened simultaneously with the seal material.
    Type: Grant
    Filed: March 5, 2001
    Date of Patent: December 31, 2002
    Assignee: Seiko Epson Corporation
    Inventor: Tatsuo Kanezawa
  • Liquid crystal display device and manufacturing method thereof
    Patent number: RE38053
    Abstract: A liquid crystal display device is provided having a plurality of electrodes in electrical communication with a conduction portion of a plurality of external wirings. An external portion is in electrical communication with the plurality of electrodes and comprises a conduction layer having a predetermined thickness, the conduction layer being arranged in a predetermined pattern on the external portion and between the external wirings and the external portion.
    Type: Grant
    Filed: March 5, 2001
    Date of Patent: April 1, 2003
    Assignee: Seiko Epson Corporation
    Inventor: Tatsuo Kanezawa