Patents by Inventor Feng-Keng Chen

Feng-Keng Chen 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).

  • Auto focus method and electric device using the same
    Patent number: 7738027
    Abstract: An auto focus method. A step length for a driving motor and a track length are defined and a storage medium is provided. The driving motor is shifted to an initial position and the storage medium is cleaned. The driving motor sequentially shifts a focus lens to a plurality of sampling positions based on the step length. A plurality of evaluation values corresponding to each sampling position and a plurality of step lengths corresponding to each evaluation value for a desired image are recorded in the storage medium. A weighted average is calculated according to the evaluation values and the step lengths recorded in the storage medium using a statistical formula. The driving motor shifts the focus lens to a focus position according to the weighted average.
    Type: Grant
    Filed: June 26, 2006
    Date of Patent: June 15, 2010
    Assignee: Asia Optical Co., Inc.
    Inventors: Ching-Yuan Cho, Feng-Keng Chen
  • AUTO FOCUS METHOD AND ELECTRONIC DEVICE USING THE SAME
    Publication number: 20060290805
    Abstract: An auto focus method. A step length for a driving motor and a track length are defined and a storage medium is provided. The driving motor is shifted to an initial position and the storage medium is cleaned. The driving motor sequentially shifts a focus lens to a plurality of sampling positions based on the step length. A plurality of evaluation values corresponding to each sampling position and a plurality of step lengths corresponding to each evaluation value for a desired image are recorded in the storage medium. A weighted average is calculated according to the evaluation values and the step lengths recorded in the storage medium using a statistical formula. The driving motor shifts the focus lens to a focus position according to the weighted average.
    Type: Application
    Filed: June 26, 2006
    Publication date: December 28, 2006
    Applicant: ASIA OPTICAL CO., INC.
    Inventors: Ching-Yuan Cho, Feng-Keng Chen