Patents by Inventor Chang-Ching LI

Chang-Ching LI 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).

  • Publication number: 20210318514
    Abstract: A focusing mechanism, including a positioning seat, a focus ring, a lens, and a knob is provided. The lens has an optical axis. The positioning seat has a first surface, a second surface opposite to the first surface, and a sliding groove penetrating the first surface and the second surface. The focus ring is slidably and rotatably disposed on the second surface of the positioning seat. The lens is fixed to the focus ring. The focus ring has a positioning hole and is located between the positioning seat and the lens. The positioning hole is aligned to the sliding groove in a direction perpendicular to the optical axis. The knob passes through the sliding groove and is inserted into the positioning hole. The knob is pressed against the first surface of the positioning seat. A projection device is also provided.
    Type: Application
    Filed: March 23, 2021
    Publication date: October 14, 2021
    Applicant: Coretronic Corporation
    Inventors: Chi-Chen Chen, Chang-Ching Li
  • Publication number: 20200189885
    Abstract: A hand lifting device and a projection apparatus are provided. The hand lifting device is adapted to carry an object, and includes a support pad and a carrying strap. The support pad has a first surface and a second surface opposite to each other, and has two first connecting portions. The carrying strap has two end portions, and the two end portions respectively have a second connecting portion. The carrying strap is configured to partially surround the object, such that the second connecting portions of the carrying strap are respectively detachably connected to the first connecting portions of the support pad. The projection apparatus comprises the above hand lifting device and a projector.
    Type: Application
    Filed: December 9, 2019
    Publication date: June 18, 2020
    Applicant: Coretronic Corporation
    Inventors: Chang-Ching Li, Ning Hsieh
  • Patent number: 8608257
    Abstract: A projector suspension device includes a casing and a suspension mechanism. The casing defines a space for accommodating an optical projection engine, and the casing has a trough extending into an inside of the casing. The suspension mechanism includes a fixed rod and a movable rod, and the fixed rod is disposed inside and fixed to the casing. One end of the movable rod is connected to the fixed rod, and another end of the movable rod is fixed to a stationary object. The movable rod is slidably coupled to the fixed rod and slides relative to the fixed rod so as to be stored inside the trough or to stick out from the trough.
    Type: Grant
    Filed: December 30, 2011
    Date of Patent: December 17, 2013
    Assignee: Coretronic Corporation
    Inventors: Chang-Ching Li, Fan-Chieh Chang, Hao-Chang Tsao
  • Publication number: 20120256525
    Abstract: A projector suspension device includes a casing and a suspension mechanism. The casing defines a space for accommodating an optical projection engine, and the casing has a trough extending into an inside of the casing. The suspension mechanism includes a fixed rod and a movable rod, and the fixed rod is disposed inside and fixed to the casing. One end of the movable rod is connected to the fixed rod, and another end of the movable rod is fixed to a stationary object. The movable rod is slidably coupled to the fixed rod and slides relative to the fixed rod so as to be stored inside the trough or to stick out from the trough.
    Type: Application
    Filed: December 30, 2011
    Publication date: October 11, 2012
    Inventors: Chang-Ching LI, Fan-Chieh Chang, Hao-Chang Tsao