Patents by Inventor Katsumi Kitagawa

Katsumi Kitagawa 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: 6747724
    Abstract: Right end portions of upper half lines in the scanning signal lines are connected to a semiconductor integrated circuit device via leading lines provided on a right side thereof, and left end portions of lower half lines in the scanning signal lines are connected to a semiconductor integrated circuit device via leading lines provided on a left side thereof. Therefore, the size of a liquid crystal display device in a widthwise direction thereof can be reduced. Also, since crossing points of the leading lines connected to the scanning signal lines are arranged outside the right side edge portion and a left side edge portion of a light shielding film, such a drawback can be prevented from occurring that ionic impurities eluted from the sealing member due a potential difference between the leading lines and the light shielding film corrode the leading lines.
    Type: Grant
    Filed: July 23, 2001
    Date of Patent: June 8, 2004
    Assignee: Casio Computer Co., Ltd.
    Inventors: Eiichi Onaka, Shinichi Kato, Katsumi Kitagawa
  • Publication number: 20020030784
    Abstract: Right end portions of upper half lines in the scanning signal lines are connected to a semiconductor integrated circuit device via leading lines provided on a right side thereof, and left end portions of lower half lines in the scanning signal lines are connected to a semiconductor integrated circuit device via leading lines provided on a left side thereof. Therefore, the size of a liquid crystal display device in a widthwise direction thereof can be reduced. Also, since crossing points of the leading lines connected to the scanning signal lines are arranged outside the right side edge portion and a left side edge portion of a light shielding film, such a drawback can be prevented from occurring that ionic impurities eluted from the sealing member due a potential difference between the leading lines and the light shielding film corrode the leading lines.
    Type: Application
    Filed: July 23, 2001
    Publication date: March 14, 2002
    Applicant: Casio Computer Co., Ltd.
    Inventors: Eiichi Onaka, Shinichi Kato, Katsumi Kitagawa
  • Patent number: 5424753
    Abstract: A display device has first and second substrates, a liquid-crystal layer, pixel electrodes arranged on the first substrate, a plurality of semiconductor active elements connected to the pixel electrodes, signal lines for supplying drive signals to the active elements, and a plurality of opposing electrodes arranged on the second substrate. Each pixel electrode, that portion of each opposing electrode which overlaps the pixel electrode, and that portion of the liquid-crystal layer which is sandwiched between the pixel electrode and said that portion of the opposing electrode form a pixel. A voltage having a positive or negative value according to the image data is applied between the input terminal of the semiconductor active element and said at least one of the opposing electrode, for a selecting period.
    Type: Grant
    Filed: December 9, 1993
    Date of Patent: June 13, 1995
    Assignee: Casio Computer Co., Ltd.
    Inventors: Katsumi Kitagawa, Hiroyuki Okimoto, Shyunichi Sato
  • Patent number: 5281498
    Abstract: A sheet-like separator has an electrolyte dripping speed of 100 mm/hr or less, wherein the values of repellent force on the pouring repellent force curve of pouring of dilute sulfuric acid shown in FIG. 1 are the following:______________________________________ if point S = P kg/dm.sup.2, point B .gtoreq. 0.55P kg/dm.sup.2 point C .gtoreq. 0.40P kg/dm.sup.2 ______________________________________A valve regulated lead acid battery employs the separator.
    Type: Grant
    Filed: May 14, 1992
    Date of Patent: January 25, 1994
    Assignees: Nippon Sheet Glass Co., Ltd., Yuasa Battery Co., Ltd.
    Inventors: Junji Muto, Hironori Kitawaki, Shoji Sugiyama, Yasuhide Nakayama, Katsumi Kitagawa, Kenjiro Kishimoto
  • Patent number: 5225298
    Abstract: A separator in which a flowing rate of an electrolyte is less than 100 mm/hr and a sealed lead acid battery using the separator.
    Type: Grant
    Filed: August 8, 1990
    Date of Patent: July 6, 1993
    Assignees: Yuasa Battery Co., Ltd., Nippon Sheet Glass Co., Ltd.
    Inventors: Yasuhide Nakayama, Katsumi Kitagawa, Kenjiro Kishimoto, Junji Muto, Hironori Kitawaki, Shoji Sugiyama
  • Patent number: 5206100
    Abstract: A separator substantially comprising only alkali-containing glass fibers with an average fiber diameter of less than 2 .mu.m, and having an electrolyte dripping speed of lower than 80 mm/hr and a content of sulfer S at the surface of the glass fibers of less than 0.02% by weight, as well as a sealed lead acid battery using such a separator.
    Type: Grant
    Filed: July 15, 1991
    Date of Patent: April 27, 1993
    Assignees: Nippon Sheet Glass Co., Ltd., Yuasa Battery Co., Ltd.
    Inventors: Junji Muto, Hironori Kitawaki, Shoji Sugiyama, Yasuhide Nakayama, Katsumi Kitagawa, Kenjiro Kishimoto