Patents by Inventor QingFeng Zhu
QingFeng Zhu 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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Method for out-coupling grating for AR optical waveguide, and design method for AR optical waveguide
Patent number: 11899203Abstract: The disclosure provides a design method of a coupling-out grating and the design method including: calculating a diffraction coupling-in angle, at which a light beam is diffracted and coupled into the optical waveguide body through the coupling-in grating, according to an angle at which the light beam is incident to the coupling-in grating, a wavelength of the light beam and a grating period of the coupling-in grating; calculating a distance between two adjacent coupling-out positions of the light beam; calculating a brightness difference rate of the light beam after being coupled out multiple times through the coupling-out grating according to the maximum diffraction efficiency of the coupling-out grating; and calculating the number of partitions of the coupling-out grating according to a length of the coupling-out grating, a sensitivity of a human eye to the light beam, the brightness difference rate, and the distance between the two adjacent coupling-out positions.Type: GrantFiled: June 16, 2022Date of Patent: February 13, 2024Assignee: JIAXING UPHOTON OPTOELECTRONICS TECHNOLOGY CO., LTD.Inventors: Xingming Zhao, Zhentao Fan, Qingfeng Zhu, Lei Sui, Kehan Tian -
Publication number: 20240045201Abstract: The disclosure provides a design method of a coupling-out grating and the design method including: calculating a diffraction coupling-in angle, at which a light beam is diffracted and coupled into the optical waveguide body through the coupling-in grating, according to an angle at which the light beam is incident to the coupling-in grating, a wavelength of the light beam and a grating period of the coupling-in grating; calculating a distance between two adjacent coupling-out positions of the light beam calculating a brightness difference rate of the light beam after being coupled out multiple times through the coupling-out grating according to the maximum diffraction efficiency of the coupling-out grating; and calculating the number of partitions of the coupling-out grating according to a length of the coupling-out grating, a sensitivity of a human eye to the light beam, the brightness difference rate, and the distance between the two adjacent coupling-out positions.Type: ApplicationFiled: June 16, 2022Publication date: February 8, 2024Inventors: Xingming ZHAO, Zhentao FAN, Qingfeng ZHU, Lei SUI, Kehan TIAN
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Patent number: 11874503Abstract: The present application provides a diffractive optical waveguide for optical pupil expansion and a display device, comprising a waveguide substrate having a coupling-in region in which a coupling-in grating is located and a coupling-out region. A first and a second diffractive light obtained by the input light diffracted by the coupling-in grating are respectively totally reflected in the waveguide substrate and directed to a first and a second coupling-out regions. A first coupling-out grating disposed in the first coupling-out region and a second coupling-out grating disposed in the second coupling-out region both are configured to couple at least a portion of light propagating therein out of the waveguide substrate by diffraction. The first and the second coupling-out regions are respectively located at both sides of the coupling-in region. A center of the coupling-in region deviates from the center line connecting the centers of the first and the second coupling-out regions.Type: GrantFiled: July 3, 2023Date of Patent: January 16, 2024Assignee: JIAXING UPHOTON OPTOELECTRONICS TECHNOLOGY CO., LTDInventors: Xingming Zhao, Zhentao Fan, Qingfeng Zhu, Kehan Tian
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Publication number: 20240004143Abstract: The present application provides a diffractive optical waveguide for optical pupil expansion and a display device, comprising a waveguide substrate having a coupling-in region in which a coupling-in grating is located and a coupling-out region. A first and a second diffractive light obtained by the input light diffracted by the coupling-in grating are respectively totally reflected in the waveguide substrate and directed to a first and a second coupling-out regions. A first coupling-out grating disposed in the first coupling-out region and a second coupling-out grating disposed in the second coupling-out region both are configured to couple at least a portion of light propagating therein out of the waveguide substrate by diffraction. The first and the second coupling-out regions are respectively located at both sides of the coupling-in region. A center of the coupling-in region deviates from the center line connecting the centers of the first and the second coupling-out regions.Type: ApplicationFiled: July 3, 2023Publication date: January 4, 2024Inventors: Xingming ZHAO, Zhentao FAN, Qingfeng ZHU, Kehan TIAN
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Patent number: 11776152Abstract: Provided is a mobile apparatus obstacle detection system (100), a mobile apparatus (10) carrying the obstacle detection system (100), and a ground-sweeping robot. The obstacle detection system (100) comprises: a structured light projection module (102) configured to project structured light onto the path of advance of the mobile apparatus (10), the structured light comprising at least one lateral detection line in the horizontal direction and at least one longitudinal detection line in the vertical direction; a camera module (103) configured to capture an image of the structured light (105); and an image processing module (104) configured to calculate, according to the image of the structured light (105), the distances and positions of obstacles (106, 107, 108) on the path of advance.Type: GrantFiled: May 10, 2021Date of Patent: October 3, 2023Assignee: JIAXING UPHOTON OPTOELECTRONICS TECHNOLOGY CO., LTD.Inventors: Chenhao Dou, Qingfeng Zhu, Jingli Yuan
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Publication number: 20230186507Abstract: Provided is a mobile apparatus obstacle detection system (100), a mobile apparatus (10) carrying the obstacle detection system (100), and a ground-sweeping robot. The obstacle detection system (100) comprises: a structured light projection module (102) configured to project structured light onto the path of advance of the mobile apparatus (10), the structured light comprising at least one lateral detection line in the horizontal direction and at least one longitudinal detection line in the vertical direction; a camera module (103) configured to capture an image of the structured light (105); and an image processing module (104) configured to calculate, according to the image of the structured light (105), the distances and positions of obstacles (106, 107, 108) on the path of advance.Type: ApplicationFiled: May 10, 2021Publication date: June 15, 2023Inventors: Chenhao DOU, Qingfeng ZHU, Jingli YUAN
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Patent number: 11428077Abstract: A method for drilling includes obtaining formation-measurement pairings, training a machine-learning model using the formation-measurement pairings, receiving measurements obtained by a tool positioned in a well formed in a formation, and generating a formation model of at least a portion of the formation using the machine-learning model and the measurements. The formation model represents one or more physical parameters of the formation, one or more structural parameters of the formation, or both.Type: GrantFiled: July 5, 2019Date of Patent: August 30, 2022Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Yan Kai Xu, Qingfeng Zhu, Hui Xie, Helen Xiaoyan Zhong, Ettore Mirto, Aria Abubakar, Yao Feng, Ping Zhang
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Publication number: 20210161013Abstract: This application provides a printed circuit board. The printed circuit board includes a first outer conducting layer, a second outer conducting layer, and at least one insulation medium layer sandwiched between the first outer conducting layer and the second outer conducting layer. The printed circuit board includes a gold finger area and a soldering area. A total thickness of all conducting layers in the gold finger area is greater than that of all conducting layers in the soldering area. Because the total thickness of all conducting layers in the gold finger area is relatively thick, resistance of the gold finger area can be reduced, and a through-current capability of the gold finger area is improved. In addition, the total thickness of all conducting layers in the soldering area is relatively thin, so that a sufficient soldering temperature and a good soldering effect can be ensured.Type: ApplicationFiled: February 3, 2021Publication date: May 27, 2021Inventors: Zongxun CHEN, Zuyu CHEN, Qingfeng ZHU
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Publication number: 20200011158Abstract: A method for drilling includes obtaining formation-measurement pairings, training a machine-learning model using the formation-measurement pairings, receiving measurements obtained by a tool positioned in a well formed in a formation, and generating a formation model of at least a portion of the formation using the machine-learning model and the measurements. The formation model represents one or more physical parameters of the formation, one or more structural parameters of the formation, or both.Type: ApplicationFiled: July 5, 2019Publication date: January 9, 2020Inventors: Yan Kai Xu, Qingfeng Zhu, Hui Xie, Helen Xiaoyan Zhong, Ettore Mirto, Aria Abubakar, Yao Feng, Ping Zhang
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Patent number: 10210638Abstract: A method for integrating graphical logging content of a subterranean wellbore includes processing a plurality of digitized display images and relevant context information to generate a single synchronized display image including representations of each of the plurality of display image. The plurality of digitized display images and relevant context information are received at a central processor from a corresponding plurality of source tools or source processors. The display images are representative of subterranean wellbore conditions.Type: GrantFiled: April 14, 2016Date of Patent: February 19, 2019Assignee: SCHLUMBERGER TECHNOLOGY CORPORATIONInventors: Qingfeng Zhu, Jean Seydoux, Ettore Mirto, Denis Heliot
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Publication number: 20170301116Abstract: A method for integrating graphical logging content of a subterranean wellbore includes processing a plurality of digitized display images and relevant context information to generate a single synchronized display image including representations of each of the plurality of display image. The plurality of digitized display images and relevant context information are received at a central processor from a corresponding plurality of source tools or source processors. The display images are representative of subterranean wellbore conditions.Type: ApplicationFiled: April 14, 2016Publication date: October 19, 2017Inventors: Qingfeng ZHU, Jean Seydoux, Ettore Mirto, Denis Heliot
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Publication number: 20110121750Abstract: Various embodiments relate to a self-oscillating half-bridge drive device, which may include a half-bridge inverter circuit having a first primary switch and a second primary switch; and a pull-down unit. The pull-down unit may prevent the other of the primary switches from being turned on when one of the primary switches is in an on state so as to avoid turning on of both primary switches. In addition, various embodiments also relate to a light-emitting device having such a self-oscillating half-bridge drive device.Type: ApplicationFiled: November 16, 2010Publication date: May 26, 2011Applicant: OSRAM GESELLSCHAFT MIT BESCHRAENKTER HAFTUNGInventors: Wei Chen, Yingxuan Lin, Dan Liu, Qingfeng Zhu
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Patent number: 7603236Abstract: The present invention is a method of determining fluid phase distribution and quantifying holdup in a wellbore. The method includes receiving a plurality of oriented probe data and grouping the oriented probe data based on a depth interval. The grouped probe data is processed and fluid phase distribution information is generated based on the processed result.Type: GrantFiled: August 21, 2006Date of Patent: October 13, 2009Assignee: Schlumberger Technology CorporationInventors: Robert James North, QingFeng Zhu, Gang Xu, Hui Jin
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Publication number: 20080046186Abstract: A method of determining fluid phase distribution comprises receiving a plurality of oriented probe data; grouping the oriented probe data based on a depth interval; processing the grouped probe data; and generating fluid phase distribution information based on the processed result.Type: ApplicationFiled: August 21, 2006Publication date: February 21, 2008Inventors: Robert James North, QingFeng Zhu, Gang Xu, Hui Jin