Patents by Inventor Yuancai LI

Yuancai 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).

  • Ultra-short focus projecting optical system and projection device
    Patent number: 11822062
    Abstract: Disclosed is an ultra-short focus projecting optical system, which includes a display unit, a first lens group having a positive focus power, a second lens group having a positive focus power, a third lens group having a negative focus power, and an aspherical reflector arranged sequentially along a projection direction. The first lens group includes a first lens, a second lens and a diaphragm arranged sequentially along the projection direction. The first lens is a glass aspherical lens, the second lens is a glass spherical lens, and the first lens and the second lens are bent toward the diaphragm from their respective centers to their respective peripheries. The ultra-short focus projecting optical system and a projection device provided by this application can realize a large aperture and high resolution.
    Type: Grant
    Filed: October 20, 2021
    Date of Patent: November 21, 2023
    Assignee: Union Optech Co., Ltd.
    Inventors: Yuancai Li, Liwei Quan, Shoulin Li, Hao Wang
  • ULTRA-SHORT FOCUS PROJECTING OPTICAL SYSTEM AND PROJECTION DEVICE
    Publication number: 20230043860
    Abstract: Disclosed is an ultra-short focus projecting optical system, which includes a display unit, a first lens group having a positive focus power, a second lens group having a positive focus power, a third lens group having a negative focus power, and an aspherical reflector arranged sequentially along a projection direction. The first lens group includes a first lens, a second lens and a diaphragm arranged sequentially along the projection direction. The first lens is a glass aspherical lens, the second lens is a glass spherical lens, and the first lens and the second lens are bent toward the diaphragm from their respective centers to their respective peripheries. The ultra-short focus projecting optical system and a projection device provided by this application can realize a large aperture and high resolution.
    Type: Application
    Filed: October 20, 2021
    Publication date: February 9, 2023
    Applicant: Union Optech Co., Ltd.
    Inventors: Yuancai LI, Liwei QUAN, Shoulin LI, Hao WANG