Patents by Inventor Yun Seup Chung

Yun Seup Chung 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).

  • Composite phosphor powder, light emitting device using the same and method for manufacturing composite phoshpor powder
    Patent number: 8012792
    Abstract: The invention provides a high quality composite phosphor powder which ensures diversity in emission spectrum, color reproduction index, color temperature and color, a light emitting device using the same and a method for manufacturing the composite phosphor powder. The composite phosphor powder comprises composite particles. Each of the composite particles includes at least two types of phosphor particles and a light transmitting binder. The phosphor particles have different emission spectrums. In addition, the light transmitting binder is formed between the phosphor particles and binds them together.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: September 6, 2011
    Assignee: Samsung LED Co., Ltd.
    Inventors: Chulsoo Yoon, Joon Ho Yoon, Chang Hoon Kwak, Yun Seup Chung
  • Phosphor blend for wavelength conversion and white light emitting device using the same
    Patent number: 7911127
    Abstract: The present invention relates to phosphor blend for wavelength conversion and a white light emitting device using the same. The phosphor blend of the invention comprises three phosphors, A5(PO4)3Cl:Eu2+, D2SiO4:Eu and MS:Eu at a composition where near ultraviolet radiation is converted into light positioned at a CIE coordinate (x, y), where 0.25?x?0.45 and 0.25?y?0.43, wherein A comprises at least one of Sr, Ca, Ba, and Mg, D comprises at least one of Ba, Sr, and Ca, and M comprises at least one of Sr and Ca. Furthermore, the present invention provides a new white light emitting device in combination of the phosphor blend and a near ultraviolet LED.
    Type: Grant
    Filed: December 28, 2005
    Date of Patent: March 22, 2011
    Assignee: Samsung LED Co., Ltd.
    Inventors: Jong Rak Sohn, Il Woo Park, Yun Seup Chung, Chang Hoon Kwak, Chul Soo Yoon, Joon Ho Yoon
  • COMPOSITE PHOSPHOR POWDER, LIGHT EMITTING DEVICE USING THE SAME AND METHOD FOR MANUFACTURING COMPOSITE PHOSHPOR POWDER
    Publication number: 20110031521
    Abstract: The invention provides a high quality composite phosphor powder which ensures diversity in emission spectrum, color reproduction index, color temperature and color, a light emitting device using the same and a method for manufacturing the composite phosphor powder. The composite phosphor powder comprises composite particles. Each of the composite particles includes at least two types of phosphor particles and a light transmitting binder. The phosphor particles have different emission spectrums. In addition, the light transmitting binder is formed between the phosphor particles and binds them together.
    Type: Application
    Filed: October 21, 2010
    Publication date: February 10, 2011
    Applicant: SAMSUNG LED CO., LTD.
    Inventors: Chulsoo YOON, Joon Ho Yoon, Chang Hoon Kwak, Yun Seup Chung
  • Composite phosphor powder, light emitting device using the same and method for manufacturing composite phosphor powder
    Patent number: 7832312
    Abstract: The invention provides a high quality composite phosphor powder which ensures diversity in emission spectrum, color reproduction index, color temperature and color, a light emitting device using the same and a method for manufacturing the composite phosphor powder. The composite phosphor powder comprises composite particles. Each of the composite particles includes at least two types of phosphor particles and a light transmitting binder. The phosphor particles have different emission spectrums. In addition, the light transmitting binder is formed between the phosphor particles and binds them together.
    Type: Grant
    Filed: August 23, 2006
    Date of Patent: November 16, 2010
    Assignee: Samsung LED Co., Ltd.
    Inventors: Chulsoo Yoon, Joon Ho Yoon, Chang Hoon Kwak, Yun Seup Chung