Patents by Inventor Yeon-Joo Choi

Yeon-Joo Choi 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).

  • Publication number: 20110031872
    Abstract: A display filter includes a base film disposed on a display panel. The base film includes a phototransmissive unit having a constant horizontal cross-sectional area, and a light absorbing unit which includes a light absorbing material and surrounds the phototransmissive unit. A plasma display panel (PDP) may include the display filter. The display filter may improve ambient contrast by increasing the transmittance of light emitted by a display panel and by blocking externally incident light.
    Type: Application
    Filed: July 1, 2010
    Publication date: February 10, 2011
    Applicant: Samsung SDI Co., Ltd.
    Inventors: Yeon-Joo Choi, Cha-Won Hwang, Sang-Mi Lee, Seung-Goo Baek
  • Publication number: 20110032344
    Abstract: A display apparatus for switching between 2-dimensional (2D) and 3-dimensional (3D) image displaying modes is disclosed. In one embodiment, the display apparatus includes: i) a display unit configured to emit light, ii) a first optical sheet configured to input the emitted light and output a first refracted light and iii) a second optical sheet configured to input the first refracted light and selectively output one of a second refracted light and a third refracted light, wherein the first optical sheet is located between the display unit and second optical sheet.
    Type: Application
    Filed: June 14, 2010
    Publication date: February 10, 2011
    Applicant: Samsung SDI Co., Ltd.
    Inventors: Yeon-Joo Choi, Cha-Won Hwang, Sang-Mi Lee, Seung-Goo Baek
  • Publication number: 20090066249
    Abstract: A display panel includes a first substrate having a plurality of address electrodes, and a second substrate having a plurality of display electrodes that include bus electrodes, the first and second substrates being arranged opposite to each other. The bus electrodes may include a mixture of a chromophore element and an electrically conductive metal, the chromophore element including at least one of a transition element and a rare earth element metal.
    Type: Application
    Filed: September 9, 2008
    Publication date: March 12, 2009
    Inventors: Chul-Hong Kim, Yeon-Joo Choi, Hyun-Mi Jeong, Soon-Rewl Lee
  • Publication number: 20080265772
    Abstract: An electrode composition includes a metal in an amount of about 52% to about 62% by weight of the composition, a glass insulation material in an amount of about 5% to about 7% by weight of the composition, a coloring agent in an amount of about 3% to about 9% by weight of the composition, and a vehicle.
    Type: Application
    Filed: April 8, 2008
    Publication date: October 30, 2008
    Inventors: Chul-Hong KIM, Jung-Keun AHN, Hyun-Mi JEONG, Yeon-Joo CHOI
  • Publication number: 20080242182
    Abstract: A method of forming electrodes of a plasma display panel comprises forming a first metal layer on a substrate, forming a second metal layer on the first metal layer using an offset printing method, forming first electrodes by baking the second metal layer, and forming second electrodes by etching the first metal layer using the first electrodes as masks.
    Type: Application
    Filed: March 28, 2008
    Publication date: October 2, 2008
    Inventors: Chul-Hong Kim, Hyun-Mi Jeong, Yeon-Joo Choi, Min-Hee Lee
  • Patent number: 5973201
    Abstract: A phenylacetamide derivative of formula (I) have potent analgesic and anti-inflammatory activities and exhibit less irritability and toxicity: ##STR1## wherein, X, Y, W, n, m and Ar are as defined in the specification.
    Type: Grant
    Filed: June 21, 1998
    Date of Patent: October 26, 1999
    Assignee: Korea Research Institute of Chemical Technology
    Inventors: No-Sang Park, Young-Sik Jung, Churl-Min Seong, Seung-Won Choi, Yeon-Joo Choi, Jong-Cheol Lee, Jin-Il Choi, Kwang-Sook Lee, Jae-Yang Kong, Bu-Yeon Lee, Jae-Hong Kim
  • Patent number: 5670546
    Abstract: N-arylalkylphenylacetamide compounds of formula (I), and pharmaceutically acceptable salts thereof, possess potent analgesic and anti-inflammatory activities.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: September 23, 1997
    Assignee: Korean Research Institute of Chemical Technology
    Inventors: No-Sang Park, Young-Sik Jung, Churl-Min Seong, Jong-Cheol Lee, Jin-Il Choi, Seung-Won Choi, Yeon-Joo Choi, Kwang-Sook Lee