Patents by Inventor Keizou Ishiai

Keizou Ishiai 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: 5550429
    Abstract: On the outer surface of a glass face panel 1 of a display device, a first layer 2 of an electrically conductive transparent thin film having a high refractive index, and a second layer 3 and a third layer 4 having a low refractive index are deposited as an anti-reflection film. The first layer 2 is formed to have a thickness in a range of 10-20 nm, whereby the surface of the anti-reflection film has a luminous reflectance of 1.5% or less, and a reflectance of 3% or less at a wavelength of 436 nm most prominent light of blue.
    Type: Grant
    Filed: December 27, 1994
    Date of Patent: August 27, 1996
    Assignee: Matsushita Electronics Corporation
    Inventors: Hidekazu Hayama, Yasunori Miura, Atsushi Suzuki, Keizou Ishiai