Patents by Inventor Won Ki Cho

Won Ki Cho 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: 8111969
    Abstract: A light guide member capable of guiding light received from at least a first light source and second light source, wherein the first light source is spaced a distance D3 from the second light source. The light guide member may include a first side including a plurality of first grooves extending along a first direction and a plurality of second grooves extending along the first direction, wherein the first grooves may have a first pitch and the second grooves have a second pitch, the first pitch being different from the second pitch.
    Type: Grant
    Filed: April 7, 2010
    Date of Patent: February 7, 2012
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Dong Ho Lee, Won Ki Cho, Min Ho Lee
  • Publication number: 20100193978
    Abstract: A light guide member capable of guiding light received from at least a first light source and second light source, wherein the first light source is spaced a distance D3 from the second light source. The light guide member may include a first side including a plurality of first grooves extending along a first direction and a plurality of second grooves extending along the first direction, wherein the first grooves may have a first pitch and the second grooves have a second pitch, the first pitch being different from the second pitch.
    Type: Application
    Filed: April 7, 2010
    Publication date: August 5, 2010
    Applicant: SAMSUNG MOBILE DISPLAY CO., LTD.
    Inventors: Dong Ho Lee, Won Ki Cho, Min Ho Lee
  • Patent number: 7697813
    Abstract: A light guide member capable of guiding light received from at least a first light source and second light source, wherein the first light source is spaced a distance D3 from the second light source. The light guide member may include a first side including a plurality of first grooves extending along a first direction and a plurality of second grooves extending along the first direction, wherein the first grooves may have a first pitch and the second grooves have a second pitch, the first pitch being different from the second pitch.
    Type: Grant
    Filed: March 23, 2007
    Date of Patent: April 13, 2010
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Dong Ho Lee, Won Ki Cho, Min Ho Lee
  • Patent number: 7568827
    Abstract: A light guide member for guiding light incident thereon from a light source, the light guide member including a plurality of the first grooves extending along a first direction on a first side of the light guide member, a plurality of second grooves extending along a second direction on the first side of the light guide member, the first direction may cross the second direction such that the first grooves and the second grooves may form a matrix pattern on the first side of the light guide member, wherein a polygonal shaped projection is formed between every two adjacent ones of the second grooves and a corresponding two adjacent ones of the first grooves.
    Type: Grant
    Filed: March 23, 2007
    Date of Patent: August 4, 2009
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Dong Ho Lee, Won Ki Cho, Jang Hwan Hwang
  • 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
  • Patent number: 7457510
    Abstract: A light guide member for guiding light may include a first pattern on a first side of the light guide member, the first pattern may include a plurality of first features extending along a first direction, and a plurality of second features extending along a second direction, wherein the first direction crosses the second direction, the first feature has a first feature size, the second feature has a second feature size, and the first feature size may be less than the second feature size.
    Type: Grant
    Filed: March 23, 2007
    Date of Patent: November 25, 2008
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Dong Ho Lee, Won Ki Cho, Jae Myung Kim, Kyung Il Park
  • Publication number: 20080203914
    Abstract: A plasma display panel and a method for manufacturing the same, which are capable of achieving a reduction in the number of manufacturing processes and a reduction in manufacturing costs, are disclosed. The plasma display panel includes a first substrate including a first electrode, and a second substrate arranged to face the first substrate. The second substrate includes a second electrode arranged to intersect with the first electrode. At least one of the first and second electrodes include a powder mixture comprising Ag powder, and metal powder of at least one selected from a group consisting of Li, K, Ba, Ca, Na, Mg, Al, Zn, Fe, Cd, Co, Ni, Sn, Pb, Cu, Hg, Pt, and Au, and mixed with the Ag powder in a volume ratio of 0.1 to 50 mol % with respect to the Ag powder.
    Type: Application
    Filed: February 25, 2008
    Publication date: August 28, 2008
    Applicant: LG ELECTRONICS INC.
    Inventors: Won Ki CHO, Min Soo PARK, Nam Seok KANG, Je Seok KIM, Byung Gil RYU
  • 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
  • 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
  • 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
  • Publication number: 20080025687
    Abstract: A light guide member for guiding light may include a first pattern on a first side of the light guide member, the first pattern may include a plurality of first features extending along a first direction, and a plurality of second features extending along a second direction, wherein the first direction crosses the second direction, the first feature has a first feature size, the second feature has a second feature size, and the first feature size may be less than the second feature size.
    Type: Application
    Filed: March 23, 2007
    Publication date: January 31, 2008
    Inventors: Dong Ho Lee, Won Ki Cho, Jae Myung Kim, Kyung Il Park
  • Publication number: 20080025686
    Abstract: A light guide member capable of guiding light received from at least a first light source and second light source, wherein the first light source is spaced a distance D3 from the second light source. The light guide member may include a first side including a plurality of first grooves extending along a first direction and a plurality of second grooves extending along the first direction, wherein the first grooves may have a first pitch and the second grooves have a second pitch, the first pitch being different from the second pitch.
    Type: Application
    Filed: March 23, 2007
    Publication date: January 31, 2008
    Inventors: Dong Ho Lee, Won Ki Cho, Min Ho Lee
  • Publication number: 20080008434
    Abstract: A light guide member for guiding light incident thereon from a light source, the light guide member including a plurality of the first grooves extending along a first direction on a first side of the light guide member, a plurality of second grooves extending along a second direction on the first side of the light guide member, the first direction may cross the second direction such that the first grooves and the second grooves may form a matrix pattern on the first side of the light guide member, wherein a polygonal shaped projection is formed between every two adjacent ones of the second grooves and a corresponding two adjacent ones of the first grooves.
    Type: Application
    Filed: March 23, 2007
    Publication date: January 10, 2008
    Inventors: Dong Ho Lee, Won Ki Cho, Jang Hwan Hwang
  • 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