Patents by Inventor Yunhui Liu

Yunhui Liu 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: 20200046441
    Abstract: An endoscope manipulator for performing robot-assisted endoscope manipulation comprises a movable robot base with a hollow trunk and a vertical lifting joint; a passive joint set with one end mounted to an upper end of the vertical lifting joint, for manually setting an initial pose of the endoscope; an active joint set mounted to another end of the passive joint set, for adjusting pose control of the endoscope intra-operatively; and a compliant endoscope holder mountable to an end-effector of the active joint set, which passively changes to a compliant state upon an external force exceeding a threshold being applied to an endoscopic lens held by the compliant endoscope holder.
    Type: Application
    Filed: August 7, 2019
    Publication date: February 13, 2020
    Inventors: Yunhui LIU, Chi-Fai Michael TONG, Fangxun ZHONG, Zerui WANG, Hiu-man YIP
  • Publication number: 20190251341
    Abstract: A skeleton posture determining method and apparatus, and a computer readable storage medium belong to the field of human body posture recognition, where the method includes obtaining a first skeleton posture including location information of a plurality of joints, determining a description parameter of at least one target joint of the joints, obtaining, through screening, a correct joint from the at least one target joint based on the description parameter, and performing fitting based on location information of the correct joint to obtain a second skeleton posture, where the second skeleton posture includes location information of at least one joint, and the at least one target joint is in a one-to-one correspondence with the at least one joint. Hence, the method, the apparatus, and the computer readable storage medium can improve recognition accuracy of a human body posture.
    Type: Application
    Filed: April 22, 2019
    Publication date: August 15, 2019
    Inventors: Qiang Nie, Yixin Wu, Yunhui Liu
  • Patent number: 10338526
    Abstract: A device, system and method for holographic 3D imaging. The device includes a laser light source that delivers a laser beam; an aperture disc including at least two pinholes, the laser beam being filtered by the pinholes so that a reference wave and an object wave are generated; a sample having a first area containing an object to be imaged and a second area without any object, in which the first area and the second area are illuminated by the object wave and the reference wave respectively; and an image sensor that captures an off-axis hologram for reconstructing an image of the object, in which the reference wave and the object wave are interfered on the image sensor and the hologram is captured based on an interference pattern of the reference wave and the object wave.
    Type: Grant
    Filed: June 2, 2016
    Date of Patent: July 2, 2019
    Assignee: THE CHINESE UNIVERSITY OF HONG KONG
    Inventors: Yujie Lu, Yunhui Liu
  • Patent number: 10208806
    Abstract: A compliant safe joint and manufacturing method thereof. The compliant safe joint includes an input axis circumferentially connected to a motor shaft of a DC motor; a movable bridge circumferentially mounted on the input axis and slidable along a axial direction of the input axis; multiple bearings, each of the multiple bearings having an inner ring fixed to the movable bridge and having an outer ring; a stationary bridge rotatably mounted on the movable bridge and having a helicoid surface, the outer ring of each bearing being movable along the helicoid surface; and a flexible component connected to the movable bridge. The stationary bridge rotates about the input axis when a torque which exceeds a predetermined threshold is applied to the stationary bridge by the motor shaft, such that the bearings move with respect to the helicoid surface to cause the flexible component to be compressed and extended through the movable bridge.
    Type: Grant
    Filed: April 1, 2016
    Date of Patent: February 19, 2019
    Assignee: THE CHINESE UNIVERSITY OF HONG KONG
    Inventors: Peng Li, Zerui Wang, Yunhui Liu
  • Publication number: 20180267688
    Abstract: An interaction method and a device for controlling a virtual object are provided. The method includes: detecting an operating entity; determining a first parameter of the operating entity; in response to the first parameter satisfying a first condition, performing an operation on the virtual object using the operating entity; and in response to the first parameter satisfying a second condition, performing an operation on the virtual object using a displayed pointer. The displayed pointer is controllable by an action of the operating entity.
    Type: Application
    Filed: March 13, 2018
    Publication date: September 20, 2018
    Inventors: Yun ZHOU, Yunhui LIU
  • Patent number: 9948907
    Abstract: A control method and a control device are provided. The control method includes: detecting first action information of an operator in a first detection mode, determining a first projection object on the projection screen and performing a first control operation on the first projection object according to the first action information in a case that the projection module is in a first projection mode; and detecting second action information of an operator in a second detection mode, determining a second projection object on the projection screen and performing a second control operation on the second projection object according to the second action information in a case that the projection module is in a second projection mode, where the first projection mode is different from the second projection mode.
    Type: Grant
    Filed: June 26, 2015
    Date of Patent: April 17, 2018
    Assignee: Lenovo (Beijing) Co., Ltd.
    Inventor: Yunhui Liu
  • Publication number: 20170017202
    Abstract: A device, system and method for holographic 3D imaging. The device includes a laser light source that delivers a laser beam; an aperture disc including at least two pinholes, the laser beam being filtered by the pinholes so that a reference wave and an object wave are generated; a sample having a first area containing an object to be imaged and a second area without any object, in which the first area and the second area are illuminated by the object wave and the reference wave respectively; and an image sensor that captures an off-axis hologram for reconstructing an image of the object, in which the reference wave and the object wave are interfered on the image sensor and the hologram is captured based on an interference pattern of the reference wave and the object wave.
    Type: Application
    Filed: June 2, 2016
    Publication date: January 19, 2017
    Inventors: Yujie LU, Yunhui LIU
  • Publication number: 20160298696
    Abstract: A compliant safe joint and manufacturing method thereof. The compliant safe joint includes an input axis circumferentially connected to a motor shaft of a DC motor; a movable bridge circumferentially mounted on the input axis and slidable along a axial direction of the input axis; multiple bearings, each of the multiple bearings having an inner ring fixed to the movable bridge and having an outer ring; a stationary bridge rotatably mounted on the movable bridge and having a helicoid surface, the outer ring of each bearing being movable along the helicoid surface; and a flexible component connected to the movable bridge. The stationary bridge rotates about the input axis when a torque which exceeds a predetermined threshold is applied to the stationary bridge by the motor shaft, such that the bearings move with respect to the helicoid surface to cause the flexible component to be compressed and extended through the movable bridge.
    Type: Application
    Filed: April 1, 2016
    Publication date: October 13, 2016
    Inventors: Peng LI, Zerui WANG, Yunhui LIU
  • Publication number: 20160274677
    Abstract: A control method and a control device are provided. The control method includes: detecting first action information of an operator in a first detection mode, determining a first projection object on the projection screen and performing a first control operation on the first projection object according to the first action information in a case that the projection module is in a first projection mode; and detecting second action information of an operator in a second detection mode, determining a second projection object on the projection screen and performing a second control operation on the second projection object according to the second action information in a case that the projection module is in a second projection mode, where the first projection mode is different from the second projection mode.
    Type: Application
    Filed: June 26, 2015
    Publication date: September 22, 2016
    Applicant: LENOVO (BEIJING) CO., LTD.
    Inventor: Yunhui LIU
  • Patent number: 9307193
    Abstract: The present invention relates to a communication method and an electronic device. The communication method is applied to a first electronic device and includes receiving a first type of a communication request from a second electronic device, and carrying out a first type of communication with the second electronic device via a first communication network in response to the communication request; when establishing the first type of communication with the second electronic device, automatically starting a second communication network for carrying out a second type of communication with the second electronic device; and carrying out the second type of communication with the second electronic device while carrying out the first type of communication with the second electronic device.
    Type: Grant
    Filed: August 11, 2014
    Date of Patent: April 5, 2016
    Assignee: LENOVO (BEIJING) CO., LTD.
    Inventor: Yunhui Liu
  • Publication number: 20150201159
    Abstract: The present invention relates to a communication method and an electronic device. The communication method is applied to a first electronic device and includes receiving a first type of a communication request from a second electronic device, and carrying out a first type of communication with the second electronic device via a first communication network in response to the communication request; when establishing the first type of communication with the second electronic device, automatically starting a second communication network for carrying out a second type of communication with the second electronic device; and carrying out the second type of communication with the second electronic device while carrying out the first type of communication with the second electronic device.
    Type: Application
    Filed: August 11, 2014
    Publication date: July 16, 2015
    Applicant: Lenovo (Beijing) Co., Ltd.
    Inventor: Yunhui LIU
  • Patent number: 8738122
    Abstract: Disclosed are systems and methods for reproducing a body motion via a network, and systems, devices and methods for identifying a body motion. In an embodiment, the system for reproducing a body motion via a network comprises a sensor configured to capture a surface electromyography signal generated by a body motion of a user at a first terminal in the network; a processor configured to receive the signal from the sensor and identify the body motion based on the received signal, and send information associated with the body motion to a second terminal in the network, the processor being located in the first terminal; and a mechanical member configured to receive the information associated with the body motion from the second terminal and reproduce the body motion based on the received information.
    Type: Grant
    Filed: August 23, 2010
    Date of Patent: May 27, 2014
    Assignee: The Chinese University of Hong Kong
    Inventors: Yunhui Liu, Xueyan Tang, Congyi Lv, Weilun Poon
  • Publication number: 20110071417
    Abstract: Disclosed are systems and methods for reproducing a body motion via a network, and systems, devices and methods for identifying a body motion. In an embodiment, the system for reproducing a body motion via a network comprises a sensor configured to capture a surface electromyography signal generated by a body motion of a user at a first terminal in the network; a processor configured to receive the signal from the sensor and identify the body motion based on the received signal, and send information associated with the body motion to a second terminal in the network, the processor being located in the first terminal; and a mechanical member configured to receive the information associated with the body motion from the second terminal and reproduce the body motion based on the received information.
    Type: Application
    Filed: August 23, 2010
    Publication date: March 24, 2011
    Applicant: The Chinese University of Hong Kong
    Inventors: Yunhui Liu, Xueyan Tang, Congyi Lv, Weilun Poon
  • Patent number: 7839810
    Abstract: The present invention provides a transmitter, a communication system and a communication method thereof. The transmitter according to the present invention comprises a transmission channel processing module for obtaining gains of respective sub-channels; a first transmission preprocessing module for performing a first transmission preprocessing to transmission data for a high-gain sub-channel based on a processed result from the transmission channel processing module; a second transmission preprocessing module for performing a second transmission preprocessing to transmission data for a low-gain sub-channel based on a processed result from the transmission channel processing module; and a transmitting antenna for summing up the transmission data processed by the first transmission preprocessing module and the second transmission preprocessing module respectively and transmitting them.
    Type: Grant
    Filed: June 13, 2007
    Date of Patent: November 23, 2010
    Assignee: Lenovo (Beijing) Limited
    Inventors: Xiaolin Zhang, Yunhui Liu
  • Publication number: 20070291700
    Abstract: The present invention provides a transmitter, a communication system and a communication method thereof. The transmitter according to the present invention comprises a transmission channel processing module for obtaining gains of respective sub-channels; a first transmission preprocessing module for performing a first transmission preprocessing to transmission data for a high-gain sub-channel based on a processed result from the transmission channel processing module; a second transmission preprocessing module for performing a second transmission preprocessing to transmission data for a low-gain sub-channel based on a processed result from the transmission channel processing module; and a transmitting antenna for summing up the transmission data processed by the first transmission preprocessing module and the second transmission preprocessing module respectively and transmitting them.
    Type: Application
    Filed: June 13, 2007
    Publication date: December 20, 2007
    Applicant: LENOVO (BEIJING) LIMITED
    Inventors: Xiaolin Zhang, Yunhui Liu