Patents by Inventor Katsuyoshi Ishihara

Katsuyoshi Ishihara 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: 8059233
    Abstract: There is disclosed a transflective liquid crystal display having pixels each including a reflective region and a transmissive region. The aperture ratio of the pixels can be enhanced. End portions of two adjacent color filters are overlapped to form an optically shielding portion for each pixel. The optically shielding portion and the reflective region cooperate to form an optically shielding film acting as a black matrix for the transmissive region. The aperture ratio is enhanced by improving the positional relationship between the reflective regions and the color filters.
    Type: Grant
    Filed: February 16, 2006
    Date of Patent: November 15, 2011
    Assignee: Hitachi Displays, Ltd.
    Inventors: Katsuyoshi Ishihara, Hironobu Yamada
  • Publication number: 20060221027
    Abstract: There is disclosed a transflective liquid crystal display having pixels each including a reflective region and a transmissive region. The aperture ratio of the pixels can be enhanced. End portions of two adjacent color filters are overlapped to form an optically shielding portion for each pixel. The optically shielding portion and the reflective region cooperate to form an optically shielding film acting as a black matrix for the transmissive region. The aperture ratio is enhanced by improving the positional relationship between the reflective regions and the color filters.
    Type: Application
    Filed: February 16, 2006
    Publication date: October 5, 2006
    Inventors: Katsuyoshi Ishihara, Hironobu Yamada
  • Patent number: 6992738
    Abstract: In a liquid crystal display device includes a pair of substrates between which a liquid crystal layer filled, a plurality of pixel regions each of which includes a pixel electrode and an active element connected to the pixel electrode on a main surface of one of the pair of substrates, the present invention provides a first electrode layer electrically connected to the active element, a color filter layer formed over the first electrode layer and having an opening portion, and a second electrode layer covering the color filter layer, and utilizes the second electrode layer as the pixel electrode by connecting the second electrode layer to the first electrode layer electrically through the opening portion of the color filter layer.
    Type: Grant
    Filed: July 14, 2003
    Date of Patent: January 31, 2006
    Assignee: Hitachi Displays, Ltd.
    Inventors: Katsuyoshi Ishihara, Tatsuo Hamamoto
  • Publication number: 20040051829
    Abstract: In a liquid crystal display device includes a pair of substrates between which a liquid crystal layer filled, a plurality of pixel regions each of which includes a pixel electrode and an active element connected to the pixel electrode on a main surface of one of the pair of substrates, the present invention provides a first electrode layer electrically connected to the active element, a color filter layer formed over the first electrode layer and having an opening portion, and a second electrode layer covering the color filter layer, and utilizes the second electrode layer as the pixel electrode by connecting the second electrode layer to the first electrode layer electrically through the opening portion of the color filter layer.
    Type: Application
    Filed: July 14, 2003
    Publication date: March 18, 2004
    Inventors: Katsuyoshi Ishihara, Tatsuo Hamamoto