Patents by Inventor Yasushi Umihira

Yasushi Umihira 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).

  • Semi-transmissive type liquid-crystal display device and method of fabricating the same
    Patent number: 7570327
    Abstract: A semi-transmissive type liquid-crystal display device suppresses the reduction and corrosion of the transmission or common electrode due to the cell corrosion reaction with a simple method. In each pixel region, the reflection electrode is formed over the glass plate, where the interlayer insulating film and the barrier metal film intervene between them. The reflection electrode is electrically connected to the transmission electrode by way of the barrier metal film. The transmission electrode and the corresponding scanning line thereto are apart from each other at a distance of 2 ?m (preferably, 3 ?m) or greater. A developer solution penetrating through the crack formed in the barrier metal film does not reach the transmission electrode (or common electrode), preventing the reduction and corrosion of the transmission or common electrode.
    Type: Grant
    Filed: July 18, 2007
    Date of Patent: August 4, 2009
    Assignee: NEC LCD Technologies, Ltd.
    Inventors: Hideto Motoshima, Kiyoshi Yanase, Yasushi Umihira, Tsutomu Hamada, Norihiro Sakumichi
  • Semi-transmissive type liquid-crystal display device and method of fabricating the same
    Publication number: 20080049177
    Abstract: A semi-transmissive type liquid-crystal display device suppresses the reduction and corrosion of the transmission or common electrode due to the cell corrosion reaction with a simple method. In each pixel region, the reflection electrode is formed over the glass plate, where the interlayer insulating film and the barrier metal film intervene between them. The reflection electrode is electrically connected to the transmission electrode by way of the barrier metal film. The transmission electrode and the corresponding scanning line thereto are apart from each other at a distance of 2 ?m (preferably, 3 ?m) or greater. A developer solution penetrating through the crack formed in the barrier metal film does not reach the transmission electrode (or common electrode), preventing the reduction and corrosion of the transmission or common electrode.
    Type: Application
    Filed: July 18, 2007
    Publication date: February 28, 2008
    Applicant: NEC LCD TECHNOLOGIES, LTD.
    Inventors: Hideto Motoshima, Kiyoshi Yanase, Yasushi Umihira, Tsutomu Hamada, Norihiro Sakumichi