Patents by Inventor Chang-Yung Chen

Chang-Yung 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).

  • PROJECTION DEVICE AND CASING STRUCTURE
    Publication number: 20230384657
    Abstract: The disclosure provides a projection device including a casing structure, a light source, a light valve element and a projection lens. The casing structure includes a main casing and at least one shielding structure. The main casing has an inner space and at least one heat dissipation opening, and the at least one shielding structure is connected to an inner surface of the main casing to be located in the inner space. The light source is disposed in an arrangement region of the inner space for providing an illumination beam. The light valve element is disposed in the arrangement region for converting the illumination beam into an image beam. The projection lens is disposed in the arrangement region for projecting the image beam. The shielding structure shades the at least one heat dissipation opening, such that the arrangement region is invisible from outside of the main casing.
    Type: Application
    Filed: August 24, 2022
    Publication date: November 30, 2023
    Applicant: Coretronic Corporation
    Inventors: Yu-Wei Guo, Chang-Yung Chen
  • Gear-skipping prevention mechanism
    Patent number: 11585410
    Abstract: A gear-skipping prevention mechanism including a first gear, a second gear, and a positioning member is provided. The first gear is sleeved on an axle. The second gear meshes with the first gear and has a first guiding groove. The positioning member includes at least one body and at least one engaging portion. Each of the at least one body has a sleeving hole. The sleeving hole is sleeved on the axle, and each of the at least one engaging portion is slidably disposed in the first guiding groove to limit a relative position between the first gear and the second gear.
    Type: Grant
    Filed: September 9, 2021
    Date of Patent: February 21, 2023
    Assignee: Coretronic Corporation
    Inventors: Che-Ming Cheng, Chang-Yung Chen, Yi-Hsiung Peng
  • GEAR-SKIPPING PREVENTION MECHANISM
    Publication number: 20220120335
    Abstract: A gear-skipping prevention mechanism including a first gear, a second gear, and a positioning member is provided. The first gear is sleeved on an axle. The second gear meshes with the first gear and has a first guiding groove. The positioning member includes at least one body and at least one engaging portion. Each of the at least one body has a sleeving hole. The sleeving hole is sleeved on the axle, and each of the at least one engaging portion is slidably disposed in the first guiding groove to limit a relative position between the first gear and the second gear.
    Type: Application
    Filed: September 9, 2021
    Publication date: April 21, 2022
    Applicant: Coretronic Corporation
    Inventors: Che-Ming Cheng, Chang-Yung Chen, Yi-Hsiung Peng