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).
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Publication number: 20200046441Abstract: 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: ApplicationFiled: August 7, 2019Publication date: February 13, 2020Inventors: Yunhui LIU, Chi-Fai Michael TONG, Fangxun ZHONG, Zerui WANG, Hiu-man YIP
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Publication number: 20190251341Abstract: 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: ApplicationFiled: April 22, 2019Publication date: August 15, 2019Inventors: Qiang Nie, Yixin Wu, Yunhui Liu
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Patent number: 10338526Abstract: 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: GrantFiled: June 2, 2016Date of Patent: July 2, 2019Assignee: THE CHINESE UNIVERSITY OF HONG KONGInventors: Yujie Lu, Yunhui Liu
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Patent number: 10208806Abstract: 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: GrantFiled: April 1, 2016Date of Patent: February 19, 2019Assignee: THE CHINESE UNIVERSITY OF HONG KONGInventors: Peng Li, Zerui Wang, Yunhui Liu
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Publication number: 20180267688Abstract: 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: ApplicationFiled: March 13, 2018Publication date: September 20, 2018Inventors: Yun ZHOU, Yunhui LIU
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Patent number: 9948907Abstract: 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: GrantFiled: June 26, 2015Date of Patent: April 17, 2018Assignee: Lenovo (Beijing) Co., Ltd.Inventor: Yunhui Liu
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Publication number: 20170017202Abstract: 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: ApplicationFiled: June 2, 2016Publication date: January 19, 2017Inventors: Yujie LU, Yunhui LIU
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Publication number: 20160298696Abstract: 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: ApplicationFiled: April 1, 2016Publication date: October 13, 2016Inventors: Peng LI, Zerui WANG, Yunhui LIU
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Publication number: 20160274677Abstract: 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: ApplicationFiled: June 26, 2015Publication date: September 22, 2016Applicant: LENOVO (BEIJING) CO., LTD.Inventor: Yunhui LIU
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Patent number: 9307193Abstract: 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: GrantFiled: August 11, 2014Date of Patent: April 5, 2016Assignee: LENOVO (BEIJING) CO., LTD.Inventor: Yunhui Liu
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Publication number: 20150201159Abstract: 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: ApplicationFiled: August 11, 2014Publication date: July 16, 2015Applicant: Lenovo (Beijing) Co., Ltd.Inventor: Yunhui LIU
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Patent number: 8738122Abstract: 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: GrantFiled: August 23, 2010Date of Patent: May 27, 2014Assignee: The Chinese University of Hong KongInventors: Yunhui Liu, Xueyan Tang, Congyi Lv, Weilun Poon
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Publication number: 20110071417Abstract: 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: ApplicationFiled: August 23, 2010Publication date: March 24, 2011Applicant: The Chinese University of Hong KongInventors: Yunhui Liu, Xueyan Tang, Congyi Lv, Weilun Poon
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Patent number: 7839810Abstract: 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: GrantFiled: June 13, 2007Date of Patent: November 23, 2010Assignee: Lenovo (Beijing) LimitedInventors: Xiaolin Zhang, Yunhui Liu
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Publication number: 20070291700Abstract: 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: ApplicationFiled: June 13, 2007Publication date: December 20, 2007Applicant: LENOVO (BEIJING) LIMITEDInventors: Xiaolin Zhang, Yunhui Liu