Patents by Inventor CHUN-TUNG WU

CHUN-TUNG WU 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 lens and projection apparatus
    Patent number: 11899170
    Abstract: An optical lens includes a first lens with a positive refractive power, a second lens having a diffractive optical surface and a negative refractive power, and a third lens with a positive refractive power arranged in order from a magnified side to a minified side. A total number of lenses with refractive powers in the optical lens is smaller than six, and the first lens, the second lens and the third lens are made of plastic.
    Type: Grant
    Filed: July 1, 2020
    Date of Patent: February 13, 2024
    Assignee: YOUNG OPTICS INC.
    Inventors: Yu-Chen Lin, Chun-Tung Wu
  • OPTICAL LENS AND PROJECTION APPARATUS
    Publication number: 20210003823
    Abstract: An optical lens includes a first lens with a positive refractive power, a second lens having a diffractive optical surface and a negative refractive power, and a third lens with a positive refractive power arranged in order from a magnified side to a minified side. A total number of lenses with refractive powers in the optical lens is smaller than six, and the first lens, the second lens and the third lens are made of plastic.
    Type: Application
    Filed: July 1, 2020
    Publication date: January 7, 2021
    Inventors: YU-CHEN LIN, CHUN-TUNG WU
  • Projection lens
    Patent number: 9335524
    Abstract: A projection lens for a projection device having a light valve is provided. The light valve provides an image light beam. The projection lens includes a first lens group, a second lens group and a reflecting lens group. The second lens group is disposed between the first lens group and the reflecting lens group. The first lens group has positive refractive power. The second lens group has positive refractive power and includes a plurality of lenses and an aperture stop located between the lenses. An angle of a field of view of the second lens group is less than 100 degrees. The reflecting lens has negative reflective power and has a curved reflecting surface to reflect the image light beam passed through the second lens group.
    Type: Grant
    Filed: June 23, 2014
    Date of Patent: May 10, 2016
    Assignee: YOUNG OPTICS INC.
    Inventors: Yi-Hsueh Chen, Hsin-Hung Lin, Chun-Tung Wu, Kun-Yao Chen
  • PROJECTION LENS
    Publication number: 20150116840
    Abstract: A projection lens for a projection device having a light valve is provided. The light valve provides an image light beam. The projection lens includes a first lens group, a second lens group and a reflecting lens group. The second lens group is disposed between the first lens group and the reflecting lens group. The first lens group has positive refractive power. The second lens group has positive refractive power and includes a plurality of lenses and an aperture stop located between the lenses. An angle of a field of view of the second lens group is less than 100 degrees. The reflecting lens has negative reflective power and has a curved reflecting surface to reflect the image light beam passed through the second lens group.
    Type: Application
    Filed: June 23, 2014
    Publication date: April 30, 2015
    Inventors: YI-HSUEH CHEN, HSIN-HUNG LIN, CHUN-TUNG WU, KUN-YAO CHEN