Patents by Inventor Hee Chan Eum

Hee Chan Eum 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).

  • Backlight unit of a liquid crystal display device
    Patent number: 7512310
    Abstract: A light guide member for guiding light received from a light source, the light source illuminating light toward the light guide member, the light guide member may include a plurality of first grooves on a first side of the light guide member, the first grooves extending along a first direction crossing a zero-degree radiation angle of the light from the light source, wherein an angle of a reflective face of the first groove increases approaching away from the light source of the light source.
    Type: Grant
    Filed: March 23, 2007
    Date of Patent: March 31, 2009
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Dong Ho Lee, Won Ki Cho, Wan Soo Han, Ho Seok Ko, Sang Hoon Lee, Hee Chan Eum, Jong Kyo Jeong
  • Light guide member and backlight unit including light guide member and methods of fabricating light guide members and backlight units
    Patent number: 7400817
    Abstract: A light guide member for guiding light received from a light source unit, the light source unit illuminating light toward the light guide member, the light guide member may include a plurality of first grooves on a first side of the light guide member, the first grooves extending along a first direction, and a plurality of first projections projecting from surfaces of the first grooves.
    Type: Grant
    Filed: March 23, 2007
    Date of Patent: July 15, 2008
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Dong Ho Lee, Won Ki Cho, Wan Soo Han, Ho Seok Ko, Sang Hoon Lee, Hee Chan Eum, Jong Kyo Jeong
  • Backlight unit of a liquid crystal display device
    Publication number: 20080043488
    Abstract: A light guide member for guiding light received from a light source unit, the light source unit illuminating light toward the light guide member, the light guide member may include a first groove on a first side of the light guide member, wherein at least one of a first width and a first depth of a first portion of the first groove may be different from a second width and a second depth of a second portion of the first groove based on a respective radiation angle of the light illuminating the first portion and the second portion of the light guide member.
    Type: Application
    Filed: March 23, 2007
    Publication date: February 21, 2008
    Inventors: Dong Ho Lee, Won Ki Cho, Wan Soo Han, Ho Seok Ko, Sang Hoon Lee, Hee Chan Eum, Jong Kyo Jeong
  • Light guide member and backlight unit including light guide member and methods of fabricating light guide members and backlight units
    Publication number: 20080025688
    Abstract: A light guide member for guiding light received from a light source unit, the light source unit illuminating light toward the light guide member, the light guide member may include a plurality of first grooves on a first side of the light guide member, the first grooves extending along a first direction, and a plurality of first projections projecting from surfaces of the first grooves.
    Type: Application
    Filed: March 23, 2007
    Publication date: January 31, 2008
    Inventors: Dong Ho Lee, Won Ki Cho, Wan Soo Han, Ho Seok Ko, Sang Hoon Lee, Hee Chan Eum, Jong Kyo Jeong
  • Backlight unit of a liquid crystal display device
    Publication number: 20080007970
    Abstract: A light guide member for guiding light received from a light source, the light source illuminating light toward the light guide member, the light guide member may include a plurality of first grooves on a first side of the light guide member, the first grooves extending along a first direction crossing a zero-degree radiation angle of the light from the light source, wherein an angle of a reflective face of the first groove increases approaching away from the light source of the light source.
    Type: Application
    Filed: March 23, 2007
    Publication date: January 10, 2008
    Inventors: Dong Ho Lee, Won Ki Cho, Wan Soo Han, Ho Seok Ko, Sang Hoon Lee, Hee Chan Eum, Jong Kyo Jeong