Patents by Inventor Chul Woung Park

Chul Woung Park 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).

  • Gonio-spectroradiometer and measuring method thereof
    Patent number: 9587984
    Abstract: A gonio-spectroradiometer and a measuring method thereof. The gonio-spectroradiometer includes a light source rotating on a light source axis, a first integrating sphere revolving around the light source with respect to a revolving axis perpendicular to the light source axis with a fixed radius and including an entrance formed in a direction to see the light source, a light intensity modulator adapted to modulate light intensity of light received through the first integrating sphere according to the rotation amount of the revolving axis, and a detector adapted to measure output light of the light intensity modulator at each wavelength.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: March 7, 2017
    Assignee: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE
    Inventors: Seongchong Park, Dong-Hoon Lee, Chul-Woung Park, Seung-Nam Park
  • GONIO-SPECTRORADIOMETER AND MEASURING METHOD THEREOF
    Publication number: 20160273966
    Abstract: A gonio-spectroradiometer and a measuring method thereof. The gonio-spectroradiometer includes a light source rotating on a light source axis, a first integrating sphere revolving around the light source with respect to a revolving axis perpendicular to the light source axis with a fixed radius and including an entrance formed in a direction to see the light source, a light intensity modulator adapted to modulate light intensity of light received through the first integrating sphere according to the rotation amount of the revolving axis, and a detector adapted to measure output light of the light intensity modulator at each wavelength.
    Type: Application
    Filed: May 26, 2016
    Publication date: September 22, 2016
    Inventors: Seongchong Park, Dong-Hoon Lee, Chul-Woung Park, Seung-Nam Park
  • Apparatus and method for inspecting homogeneity of solar cell quantum efficiency using imaging device
    Patent number: 8390309
    Abstract: The present invention relates to an apparatus and a method for inspecting quantum efficiency homogeneity of a solar cell using a spatial light modulating device. The apparatus includes a light emitting device configured to radiate predetermined light; a spatial light modulating device configured to change a light path of rays emitted from the light emitting device according to individual control of a plurality of pixels; a spatial light modulating device controller configured to individually control the states of the plurality of pixels; a solar cell which the rays passing through or reflected from the spatial light modulating device irradiate; and a calculation controller configured to calculate quantum efficiency of the solar cell based on a photocurrent signal generated from the solar cell.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: March 5, 2013
    Assignee: Korea Research Institute of Standards and Science
    Inventors: Seung Nam Park, Dong-Hoon Lee, Seongchong Park, Chul Woung Park, Seung Kwan Kim, Ji Soo Hwang, Yong Shim Yoo, Dong-Joo Shin
  • APPARATUS AND METHOD FOR INSPECTING HOMOGENEITY OF SOLAR CELL QUANTUM EFFICIENCY USING IMAGING DEVICE
    Publication number: 20110227598
    Abstract: The present invention relates to an apparatus and a method for inspecting quantum efficiency homogeneity of a solar cell using a spatial light modulating device. The apparatus includes a light emitting device configured to radiate predetermined light; a spatial light modulating device configured to change a light path of rays emitted from the light emitting device according to individual control of a plurality of pixels; a spatial light modulating device controller configured to individually control the states of the plurality of pixels; a solar cell which the rays passing through or reflected from the spatial light modulating device irradiate; and a calculation controller configured to calculate quantum efficiency of the solar cell based on a photocurrent signal generated from the solar cell.
    Type: Application
    Filed: December 30, 2009
    Publication date: September 22, 2011
    Inventors: Seung Nam Park, Dong-Hoon Lee, Seongchong Park, Chul Woung Park, Seung Kwan Kim, Ji Soo Hwang, Yong Shim Yoo, Dong-Joo Shim