Patents by Inventor Koichi Kuraue

Koichi Kuraue 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).

  • Method and apparatus for measuring cell gap of VA liquid crystal panel
    Patent number: 6628389
    Abstract: Light is directed to a VA (Vertical Alignment) liquid crystal panel whose optical axis is in a direction perpendicular to the panel surface in such a manner that the light is incident obliquely on the VA liquid crystal panel surface, by which birefringence that results only from the liquid crystal layer is artificially generated so that measurement of the thickness (cell gap) of the VA liquid crystal is accurately performed.
    Type: Grant
    Filed: May 9, 2001
    Date of Patent: September 30, 2003
    Assignee: Otsuka Electronics Co., Ltd.
    Inventors: Tomohiro Akada, Kenji Murano, Koichi Kuraue