Patents by Inventor Yukiyoshi Katahira

Yukiyoshi Katahira 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).

  • Light guide device, electro-optical device, and electronic apparatus
    Patent number: 7139046
    Abstract: A light guide plate 122 is shaped like a wedge whose thickness gradually decreases from the left end in the figure to the right end, and a light guide plate 142 is shaped like a wedge whose thickness gradually decreases from the right end in the figure to the left end. Since the wedges of the light guide plates 122 and 142 are arranged in a staggered manner, the thickness of the entire liquid crystal display device 100 can be reduced.
    Type: Grant
    Filed: September 5, 2002
    Date of Patent: November 21, 2006
    Assignee: Seiko Epson Corporation
    Inventor: Yukiyoshi Katahira
  • Light guide device, electro-optical device, and electronic apparatus
    Publication number: 20030063456
    Abstract: A light guide plate 122 is shaped like a wedge whose thickness gradually decreases from the left end in the figure to the right end, and a light guide plate 142 is shaped like a wedge whose thickness gradually decreases from the right end in the figure to the left end. Since the wedges of the light guide plates 122 and 142 are arranged in a staggered manner, the thickness of the entire liquid crystal display device 100 can be reduced.
    Type: Application
    Filed: September 5, 2002
    Publication date: April 3, 2003
    Inventor: Yukiyoshi Katahira