Patents by Inventor Yong-Chao Yang

Yong-Chao Yang 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).

  • Optical device
    Patent number: 9128239
    Abstract: In an optical device, a first spring connects a first lens frame and a second lens frame for exerting a spring force thereon so that first pins of the first lens frame and second pins of the second lens frame abut a first cam groove and a second cam groove of a cam barrel respectively. A second spring connects the second lens frame and a third lens frame for exerting a spring force thereon so that the second pins of the second lens frame and third pins of the third lens frame abut the second cam groove and a third cam groove of the cam barrel respectively. The first spring may be a compression spring, and the second spring may be an extension spring.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: September 8, 2015
    Assignees: SINTAI OPTICAL (SHENZHEN) CO., LTD., ASIA OPTICAL INTERNATIONAL LTD.
    Inventors: Duen-Kwei Hwang, Tsung-Tse Chen, Yong-Chao Yang
  • Optical Device
    Publication number: 20140355132
    Abstract: In an optical device, a first spring connects a first lens frame and a second lens frame for exerting a spring force thereon so that first pins of the first lens frame and second pins of the second lens frame abut a first cam groove and a second cam groove of a cam barrel respectively. A second spring connects the second lens frame and a third lens frame for exerting a spring force thereon so that the second pins of the second lens frame and third pins of the third lens frame abut the second cam groove and a third cam groove of the cam barrel respectively. The first spring may be a compression spring, and the second spring may be an extension spring.
    Type: Application
    Filed: May 27, 2014
    Publication date: December 4, 2014
    Applicants: Sintai Optical (Shenzhen) Co., Ltd., Asia Optical International Ltd.
    Inventors: Duen-Kwei Hwang, Tsung-Tse Chen, Yong-Chao Yang