Patents by Inventor Gyoung II Cho

Gyoung II 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: 9505606
    Abstract: A MEMS (micro electro mechanical system) actuator with discretely controlled multiple motions comprises bottom layer, stepper plate, support, and motion plate. The multiple motion of the motion plate is generated by the electrostatically actuated stepper plates and geometrically predetermined supports. By introducing the MEMS actuator with discretely controlled multiple motions, simple motion control can be achieved by digital controlling and only single voltage is needed for motion control of the motion plate.
    Type: Grant
    Filed: June 13, 2007
    Date of Patent: November 29, 2016
    Assignees: Angstrom, Inc., Stereo Display, Inc.
    Inventors: Jin Young Sohn, Gyoung II Cho, Cheong Soo Seo
  • Patent number: 7605989
    Abstract: A compact auto-focus image taking lens system with a Micromirror Array Lens and a lens-surfaced prism of the present invention comprises a lens-surfaced prism, an aperture stop, a first lens element, a second lens element, a Micromirror Array Lens, and an image surface, optionally an infrared cut-off filter. By introducing a Micromirror Array Lens and a lens-surfaced prism, the compact auto-focus image taking lens system with a Micromirror Array Lens and a lens-surfaced prism of the present invention has many advantages over the prior arts in the field of invention, such as compactness in thickness, small number of optical elements, high performance of optical quality, fast focusing speed, low power consumption, enough space for optional elements such as an infrared cut-off filter and diversity in optical geometries.
    Type: Grant
    Filed: July 22, 2008
    Date of Patent: October 20, 2009
    Assignees: Angstrom, Inc., Stereo Display, Inc.
    Inventors: Jin Young Sohn, Gyoung II Cho, Cheong Soo Seo