Patents by Inventor Irie Katsumi

Irie Katsumi 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).

  • Defect detection method and apparatus for active matrix substrate or active matrix liquid crystal panel and defect repairing method thereof
    Patent number: 5608558
    Abstract: According to the present invention, a defect detection method for at least one of an active matrix substrate and an active matrix liquid crystal panel is provided. The active matrix substrate includes: an insulating substrate; a plurality of pixel electrodes arranged in a matrix fashion on the substrate; switching elements for driving the plurality of pixel electrodes; and scanning lines and signal lines which are respectively connected to the switching elements and are formed so as to be crossed with each other, while the active matrix liquid crystal panel includes: the active matrix substrate; a counter substrate provided with counter electrodes thereon and disposed so as to be opposed to the active matrix substrate; and a liquid crystal layer interposed between the active matrix substrate and the counter substrate.
    Type: Grant
    Filed: April 18, 1995
    Date of Patent: March 4, 1997
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Irie Katsumi