Patents by Inventor Tetsuji Okajima

Tetsuji Okajima 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: 6744202
    Abstract: In order to provide an AC type plasma display panel having improved luminous efficiency, small power consumption and high luminance, sustaining electrodes (14a, 14b) of the AC type plasma display panel take in the form of mesh electrodes each having a plurality of openings (13). Each opening (13) is a strip-shaped opening having a size included in a rectangular area having one of sides thereof smaller than 30 &mgr;m or having a width smaller than 30 &mgr;m.
    Type: Grant
    Filed: June 26, 2001
    Date of Patent: June 1, 2004
    Assignee: NEC Corporation
    Inventors: Akifumi Okigawa, Tetsuji Okajima
  • Publication number: 20010054872
    Abstract: In order to provide an AC type plasma display panel having improved luminous efficiency, small power consumption and high luminance, sustaining electrodes (14a, 14b) of the AC type plasma display panel take in the form of mesh electrodes each having a plurality of openings (13). Each opening (13) is a strip-shaped opening having a size included in a rectangular area having one of sides thereof smaller than 30 &mgr;m or having a width smaller than 30 &mgr;m.
    Type: Application
    Filed: June 26, 2001
    Publication date: December 27, 2001
    Applicant: NEC Corporation
    Inventors: Akifumi Okigawa, Tetsuji Okajima
  • Patent number: 6084349
    Abstract: A surface discharge alternating current plasma display panel has a pair of transparent electrodes supplied with current from metal bus electrodes through connecting portions spaced from each other by slits, a dielectric layer covering the pair of transparent electrodes and the metal bus electrodes and a porous insulating layer covering a part of the dielectric layer over the metal bus electrodes; when surface discharge occurs between the transparent electrodes of the pair, the surface discharge is spread toward the bus electrodes; however, the surface discharge can not exceed the slits; for this reason, the surface discharge is concentrated over the transparent electrodes.
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: July 4, 2000
    Assignee: NEC Corporation
    Inventors: Mitsuo Ueoka, Tetsuji Okajima
  • Patent number: 6072276
    Abstract: In an AC type plasma display panel in which a discharge electrode and an dielectric material layer are formed on its substrate on the display surface, it has a structure in which a thin color filter layer containing fine inorganic pigment particles as its main component is formed in contact with or within the dielectric material layer. The color filter layer containing the fine pigment particles as its main component can have good performance by arranging that the color filter layer has a thickness of 0.5 through 5 microns, and the fine pigment particles have average particle size of 0.01-0.15 microns.
    Type: Grant
    Filed: June 19, 1997
    Date of Patent: June 6, 2000
    Assignee: NEC Corporation
    Inventor: Tetsuji Okajima