Patents by Inventor Yuji Sakashita

Yuji Sakashita 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).

  • Display device
    Patent number: 7914195
    Abstract: A display device has a light guide plate formed with a display pattern by a plurality of diffusion dots having translucency in a display pattern formed region, a light shielding layer, and a light source. A plurality of the light guide plates are arranged facing each other, and the light shielding layer is sandwiched between the light guide plates. Light from the light source is selectively introduced to one of the light guide plates to display the display pattern of the light guide plate. The light shielding layer has a surface facing an observer's side formed by a low reflectivity material and a surface facing a side opposite to the observer's side formed by a high reflectivity material. A region facing the display pattern of the light guide plate positioned on the side opposite to the observer's side than the light shielding layer is cut out.
    Type: Grant
    Filed: February 11, 2009
    Date of Patent: March 29, 2011
    Assignee: OMRON Corporation
    Inventors: Atsushi Sawada, Toshimitsu Fujiwara, Yuji Sakashita, Yusuke Akioka
  • DISPLAY DEVICE
    Publication number: 20090219734
    Abstract: A display device has a light guide plate formed with a display pattern by a plurality of diffusion dots having translucency in a display pattern formed region, a light shielding layer, and a light source. A plurality of the light guide plates are arranged facing each other, and the light shielding layer is sandwiched between the light guide plates. Light from the light source is selectively introduced to one of the light guide plates to display the display pattern of the light guide plate. The light shielding layer has a surface facing an observer's side formed by a low reflectivity material and a surface facing a side opposite to the observer's side formed by a high reflectivity material. A region facing the display pattern of the light guide plate positioned on the side opposite to the observer's side than the light shielding layer is cut out.
    Type: Application
    Filed: February 11, 2009
    Publication date: September 3, 2009
    Applicant: OMRON Corporation
    Inventors: Atsushi Sawada, Toshimitsu Fujiwara, Yuji Sakashita, Yusuke Akioka