Patents by Inventor Gan-Chieh Chang

Gan-Chieh Chang 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).

  • Adjustable lens assembly
    Patent number: 6570717
    Abstract: An adjustable lens assembly includes a lens barrel for carrying a lens, at least one guiding member having a shaft axis parallel to the optical axis of the lens barrel for guiding the direction of motion of the lens barrel, a gear shaft driven by a driving source, a driving member meshing with the gear shaft, and a connection mechanism connecting the lens barrel and the driving member. The connection mechanism is capable of adjusting itself with multiple degrees of freedom so that if there is three-dimensional skew bias between the gear shaft and the optical axis or the guiding member, the lens barrel can be driven smoothly.
    Type: Grant
    Filed: May 9, 2002
    Date of Patent: May 27, 2003
    Assignee: Industrial Technology Research Institute
    Inventors: Yin-Fa Tu, Huang-Cheng Chiang, Chih-Wen Chen, Gan-Chieh Chang
  • ADJUSTABLE LENS ASSEMBLY
    Publication number: 20030095337
    Abstract: An adjustable lens assembly includes a lens barrel for carrying a lens, at least one guiding member having a shaft axis parallel to the optical axis of the lens barrel for guiding the direction of motion of the lens barrel, a gear shaft driven by a driving source, a driving member meshing with the gear shaft, and a connection mechanism connecting the lens barrel and the driving member. The connection mechanism is capable of adjusting itself with multiple degrees of freedom so that if there is three-dimensional skew bias between the gear shaft and the optical axis or the guiding member, the lens barrel can be driven smoothly.
    Type: Application
    Filed: May 9, 2002
    Publication date: May 22, 2003
    Inventors: Yin-fa Tu, Huang-Chen Chiang, Chih-Wen Chen, Gan-Chieh Chang