Patents by Inventor Li-Lun Hu

Li-Lun Hu 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).

  • Zoom projection lens
    Patent number: 11520128
    Abstract: A zoom projection lens with eleven lens elements is provided. The zoom projection lens sequentially includes a first lens group, a second lens group, a third lens group, an aperture stop, a fourth lens group and a fifth lens group along an optical axis from a screen side to an image source side. The first lens group has a negative refractive power and includes three lens elements. The second lens group has a positive refractive power and includes one lens element. The third lens group has a positive refractive power and includes one lens element. The fourth lens group has a negative refractive power and includes four lens elements. The fifth lens group has a positive refractive power and includes two lens elements. A first lens element in the first lens group is an aspheric lens made of plastic.
    Type: Grant
    Filed: May 20, 2020
    Date of Patent: December 6, 2022
    Assignee: Coretronic Corporation
    Inventors: Li-Lun Hu, Ching-Chuan Wei, Meng-Feng Chung, Tao-Hung Kuo, Chuan-Te Cheng
  • ZOOM PROJECTION LENS
    Publication number: 20200379224
    Abstract: A zoom projection lens with eleven lens elements is provided. The zoom projection lens sequentially includes a first lens group, a second lens group, a third lens group, an aperture stop, a fourth lens group and a fifth lens group along an optical axis from a screen side to an image source side. The first lens group has a negative refractive power and includes three lens elements. The second lens group has a positive refractive power and includes one lens element. The third lens group has a positive refractive power and includes one lens element. The fourth lens group has a negative refractive power and includes four lens elements. The fifth lens group has a positive refractive power and includes two lens elements. A first lens element in the first lens group is an aspheric lens made of plastic.
    Type: Application
    Filed: May 20, 2020
    Publication date: December 3, 2020
    Applicant: Coretronic Corporation
    Inventors: Li-Lun Hu, Ching-Chuan Wei, Meng-Feng Chung, Tao-Hung Kuo, Chuan-Te Cheng