Patents by Inventor Won-ho Yoon

Won-ho Yoon 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).

  • Green-emitting phosphor composition and cathode ray tube manufactured using the same
    Patent number: 6504297
    Abstract: Disclosed is a green-emitting phosphor composition comprising:75 to 95 wt % of a phosphor of the formula Y2SiO5:Tb, and 5 to 25 wt % of a phosphor of the formula SrGa2S4:Eu. The composition has excellent luminance, degradation and afterglow characteristics so that it can be advantageously used for manufacturing projection type CRTs.
    Type: Grant
    Filed: April 12, 2000
    Date of Patent: January 7, 2003
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Gyeong-jae Heo, Won-ho Yoon, Joa-young Jeong
  • Green-emitting phosphor composition and cathode ray tube manufactured using the same
    Patent number: 6465946
    Abstract: A green-emitting phosphor composition and a cathode ray tube (CRT) manufactured using the same are provided. The composition including 5 to 50 wt % of a SrGa2S4:Eu phosphor and 50 to 95 wt % of a Y2(Al, Ga)5O12:Tb phosphor has excellent luminance, degradation and afterglow characteristics so that it can be advantageously used for manufacturing projection type CRTs.
    Type: Grant
    Filed: April 13, 2000
    Date of Patent: October 15, 2002
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Won-ho Yoon, Joa-young Jeong, Gyeong-jae Heo
  • Phosphor screen for a flickerless cathode ray tube and a process for preparing the same
    Patent number: 5998918
    Abstract: A method of manufacturing a phosphor screen for a flickerless cathode ray tube comprising the steps of forming red and green phosphor layers on a panel for a cathode ray tube on which a black matrix is formed, forming a blue phosphor layer on said panel on which a black matrix is formed by coating the blue phosphor slurry and drying and forming a double phosphor layer by coating an ultraviolet phosphor slurry on said blue phosphor layer and drying, is provided.
    Type: Grant
    Filed: November 24, 1997
    Date of Patent: December 7, 1999
    Assignee: Samsung Display Devices Co., Ltd.
    Inventors: Young-rag Do, Chang-won Park, Joon-bae Lee, Won-ho Yoon