Patents by Inventor Charles Chul-Whei Koo

Charles Chul-Whei Koo 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).

  • Liquid crystal on silicon micro-display using carbon nanotube
    Patent number: 7728947
    Abstract: A nano-liquid crystal on silicon (nano-LCoS) chip having carbon nanotube (CNT) pillars that are grown on a glass substrate thereof. As the heights of the CNT pillars are uniform, the CNT pillars can function as spacers providing a uniform cell gap between the glass substrate and a silicon chip of the nano-LCoS chip. Also, being excellent electrical conductors, CNT pillars can form a part of the electrical connection between an outside voltage source and the indium tin oxide (ITO) layer formed on the glass substrate. The nano-LCoS chip includes nano-LCoS alignment keys that are formed in the silicon chip and connected to the CNT pillars. By applying the same voltage to the ITO layer and keys, a portion of the liquid crystal activated by the keys become transparent fiduciary marks for optical alignment of nano-LCoS chips.
    Type: Grant
    Filed: January 19, 2009
    Date of Patent: June 1, 2010
    Assignees: Wuhan Splendid Optronics Technology Co., Ltd., Sysview Technology, Inc.
    Inventors: Gihong Kim, Charles Chul-Whei Koo
  • Carbon nano tube technology in liquid crystal on silicon micro-display
    Patent number: 7483112
    Abstract: A nano-liquid crystal on silicon (nano-LCoS) chip having carbon nanotube (CNT) pillars that are grown on a glass substrate thereof. As the heights of the CNT pillars are uniform, the CNT pillars can function as spacers providing a uniform cell gap between the glass substrate and a silicon chip of the nano-LCoS chip. Also, being excellent electrical conductors, CNT pillars can form a part of the electrical connection between an outside voltage source and the indium tin oxide (ITO) layer formed on the glass substrate. The nano-LCoS chip includes nano-LCoS alignment keys that are formed in the silicon chip and connected to the CNT pillars. By applying the same voltage to the ITO layer and keys, a portion of the liquid crystal activated by the keys become transparent fiduciary marks for optical alignment of nano-LCoS chips.
    Type: Grant
    Filed: September 12, 2005
    Date of Patent: January 27, 2009
    Assignees: Sysview Technology, Inc., Wuhan Splendid Optronics Technology Co., Ltd.
    Inventors: Gihong Kim, Charles Chul-Whei Koo