Patents by Inventor Jeong B. Ji

Jeong B. Ji 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).

  • Thin film actuated mirror array
    Patent number: 5589084
    Abstract: A thin film actuated mirror for an actuated mirror array includes a pedestal and at least piezoelectric structure cantilevered from the pedestal. The piezoelectric structure includes a layer of piezoelectric material having two opposing surfaces. Each of two metal electrodes are mounted on a respective one of the opposing surfaces of the piezoelectric material layer. An electrical signal is applied across the piezoelectric material, between the electrodes, causing deformation of the piezoelectric material. The thin film actuated mirror further includes a mirror surface interconnected to the piezoelectric material layer such that the mirror surface deforms in response to the deformation of the piezoelectric material layer.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: December 31, 1996
    Assignees: Daewoo Electronics Co. Ltd., Aura Systems, Inc.
    Inventors: Jeong B. Ji, Gregory Um
  • Thin film actuated mirror array
    Patent number: 5481396
    Abstract: A thin film actuated mirror for an actuated mirror array includes a pedestal and at least piezoelectric structure cantilevered from the pedestal. The piezoelectric structure includes a layer of piezoelectric material having two opposing surfaces. Each of two metal electrodes are mounted on a respective one of the opposing surfaces of the piezoelectric material layer. An electrical signal is applied across the piezoelectric material, between the electrodes, causing deformation of the piezoelectric material. The thin film actuated mirror further includes a mirror surface interconnected to the piezoelectric material layer such that the mirror surface deforms in response to the deformation of the piezoelectric material layer.
    Type: Grant
    Filed: February 23, 1994
    Date of Patent: January 2, 1996
    Assignee: Aura Systems, Inc.
    Inventors: Jeong B. Ji, Gregory Um