Patents Assigned to Daegoo Electronic Materials Co., Ltd.
  • Lamp having good maintenance behavior of brightness and color coordinations
    Patent number: 7652416
    Abstract: Disclosed herein is a lamp including a specific phosphor and having good ability to maintain brightness and color coordinates. Particularly, this invention provides a lamp using a phosphor in which a magnetoplumbite phase is epitaxially formed on the surface of a phosphor having a ? alumina phase.
    Type: Grant
    Filed: March 28, 2006
    Date of Patent: January 26, 2010
    Assignee: Daegoo Electronic Materials Co., Ltd.
    Inventors: Kwang Wook Choi, Do Hoon Kim, Ick Soon Kwak, Tae Hyun Kwon