Patents by Inventor Masanori Ookawa

Masanori Ookawa 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: 8289464
    Abstract: A liquid crystal display device includes pixels, each of which includes a first transistor and a second transistor. The size of the first transistor is larger than the size of the second transistor. In addition, channel widths and gate widths for the first transistor are larger than those of the second transistor. Also, the first transistor is located to be closer to a drain signal line provided for the pixel than the second transistor. In normal operation, the first transistor is coupled to the drain signal line and the second transistor is floating. However, if an abnormality occurs in the first transistor, it is cut off from the drain signal line and the second transistor is connected to the drain signal line by a repair line.
    Type: Grant
    Filed: May 4, 2010
    Date of Patent: October 16, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Tetsuya Kawamura, Masashi Sato, Masanori Ookawa, Kenta Kamoshida, Nagatoshi Kurahashi, Hiroaki Iwato
  • Publication number: 20100214205
    Abstract: A liquid crystal display device includes pixels, each of which includes a first transistor and a second transistor. The size of the first transistor is larger than the size of the second transistor. In addition, channel widths and gate widths for the first transistor are larger than those of the second transistor. Also, the first transistor is located to be closer to a drain signal line provided for the pixel than the second transistor. In normal operation, the first transistor is coupled to the drain signal line and the second transistor is floating. However, if an abnormality occurs in the first transistor, it is cut off from the drain signal line and the second transistor is connected to the drain signal line by a repair line.
    Type: Application
    Filed: May 4, 2010
    Publication date: August 26, 2010
    Inventors: Tetsuya KAWAMURA, Masashi Sato, Masanori Ookawa, Kenta Kamoshida, Nagatoshi Kurahashi, Hiroaki Iwato
  • Patent number: 7764330
    Abstract: A normal transistor CTFT connected to a data signal line DL and a pixel electrode PX and a spare transistor FTFT in a floating state are formed on a gate line GL. When an operational abnormality occurs in the normal transistor CTFT, the normal transistor CTFT is cut off from the data signal line DL and is cut off from the pixel electrode PX connected via a through hole TH by cutting lines CL. Thereafter, the spare transistor FTFT is connected to the data signal line DL and the pixel electrode PX by repair lines RL.
    Type: Grant
    Filed: April 20, 2007
    Date of Patent: July 27, 2010
    Assignee: Hitachi Displays, Ltd.
    Inventors: Tetsuya Kawamura, Masashi Sato, Masanori Ookawa, Kenta Kamoshida, Nagatoshi Kurahashi, Hiroaki Iwato
  • Publication number: 20080036936
    Abstract: A normal transistor CTFT connected to a data signal line DL and a pixel electrode PX and a spare transistor FTFT in a floating state are formed on a gate line GL. When an operational abnormality occurs in the normal transistor CTFT, the normal transistor CTFT is cut off from the data signal line DL and is cut off from the pixel electrode PX connected via a through hole TH by cutting lines CL. Thereafter, the spare transistor FTFT is connected to the data signal line DL and the pixel electrode PX by repair lines RL.
    Type: Application
    Filed: April 20, 2007
    Publication date: February 14, 2008
    Inventors: Tetsuya Kawamura, Masashi Sato, Masanori Ookawa, Kenta Kamoshida, Nagatoshi Kurahashi, Hiroaki Iwato