Patents by Inventor Gyoujin Cho

Gyoujin 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).

  • Microfluidics with wirelessly powered electronic circuits
    Patent number: 10024819
    Abstract: Techniques, devices and systems are described for incorporating a printed circuit with a microfluidic device and wirelessly powering the microfluidic device. In one aspect, a microfluidic device includes a substrate with a fluidic channel to provide a path for a fluid with particles. The fluidic channel includes fluid inlet and outlet. A pair of electrodes near the inlet and the outlet guides the particles toward a center of the fluidic channel using negative-dielectrophoresis (DEP) effect in response to an alternating current (AC) frequency voltage received at the pairs of electrodes. Additional pairs of electrodes are disposed along a border of the fluidic channel between the pairs of electrodes near the inlet and the outlet of the fluidic channel to isolate a subpopulation of the particles using positive and negative DEP effects in response to AC voltages of different frequencies received at different ones of the additional pairs of electrodes.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: July 17, 2018
    Assignees: The Regents of the University of California, Industry-Academic Cooperation Foundation of Sunchon National University
    Inventors: Yu-Hwa Lo, Wen Qiao, Gyoujin Cho, Hwiwon Kang
  • MICROFLUIDICS WITH WIRELESSLY POWERED ELECTRONIC CIRCUITS
    Publication number: 20140061049
    Abstract: Techniques, devices and systems are described for incorporating a printed circuit with a microfluidic device and wirelessly powering the microfluidic device. In one aspect, a microfluidic device includes a substrate with a fluidic channel to provide a path for a fluid with particles. The fluidic channel includes fluid inlet and outlet. A pair of electrodes near the inlet and the outlet guides the particles toward a center of the fluidic channel using negative-dielectrophoresis (DEP) effect in response to an alternating current (AC) frequency voltage received at the pairs of electrodes. Additional pairs of electrodes are disposed along a border of the fluidic channel between the pairs of electrodes near the inlet and the outlet of the fluidic channel to isolate a subpopulation of the particles using positive and negative DEP effects in response to AC voltages of different frequencies received at different ones of the additional pairs of electrodes.
    Type: Application
    Filed: October 21, 2011
    Publication date: March 6, 2014
    Inventors: Yu-Hwa Lo, Wen Qiao, Gyoujin Cho, Hwiwon Kang
  • Single walled carbon nanotubes coated with dielectric substance and TFT using thereof
    Patent number: 7776764
    Abstract: The present invention relates to a technology for printing a thin film transistor (TFT) using single walled carbon nanotubes coated with dielectric substance having a thickness of several nm and thus capable of improving significantly a low on/off ratio of an existing single walled carbon nanotube TFT.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: August 17, 2010
    Assignee: Paru Co., Ltd
    Inventors: Gyoujin Cho, Sun Hee Kim, Eun Kyung Kim, Min-hun Jung