Patents by Inventor Xiaodong Lu

Xiaodong Lu 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).

  • Patent number: 11342828
    Abstract: Aspects of the invention provide methods and systems for moving a plurality of moveable stages relative to a stator. The stator comprises a plurality of coils shaped to provide pluralities of coil trace groups where each coil trace group comprises a corresponding plurality of generally linearly elongated coil traces which extend across a stator tile. Each moveable stage comprises a plurality of magnet arrays. Methods and apparatus are provided for moving the moveable stages relative to the stator, where a magnet array from a first moveable stage and a magnet array from a second moveable stage both overlap a shared group of coil traces. For at least a portion of the time that the magnet arrays from the first and second moveable stages overlap the shared group of coil traces, currents are controllably driven in the shared coil trace group based on the positions of both the first and second moveable stages. The positions of the first and second moveable stages may be ascertained by feedback.
    Type: Grant
    Filed: September 24, 2020
    Date of Patent: May 24, 2022
    Assignee: The University of British Columbia
    Inventor: Xiaodong Lu
  • Publication number: 20220032477
    Abstract: Various embodiments relate to magnetically moveable displacement devices or robotic devices. Particular embodiments provide systems and corresponding methods for magnetically moving multiple movable robots relative to one or more working surfaces of respective one or more work bodies, and for moving robots between the one or more work bodies via transfer devices. Robots can carry one or more objects among different locations, manipulate carried objects, and/or interact with their surroundings for particular functionality including but not limited to assembly, packaging, inspection, 3D printing, test, laboratory automation, etc. A mechanical link may be mounted on planar motion units such as said robots.
    Type: Application
    Filed: January 25, 2021
    Publication date: February 3, 2022
    Inventors: Xiaodong Lu, Peter Tang, Alexander H. Slocum, Rui Chen
  • Patent number: 11228232
    Abstract: Displacement devices comprise a stator and a moveable stage. The stator comprises a plurality of coils shaped to provide pluralities of generally linearly elongated coil traces in one or more layers. Layers of coils may overlap in the Z-direction. The moveable stage comprises a plurality of magnet arrays. Each magnet array may comprise a plurality of magnetization segments generally linearly elongated in a corresponding direction. Each magnetization segment has a magnetization direction generally orthogonal to the direction in which it is elongated and at least two of the magnetization directions are different from one another. One or more amplifiers may be connected to selectively drive current in the coil traces and to thereby effect relative movement between the stator and the moveable stage.
    Type: Grant
    Filed: December 16, 2019
    Date of Patent: January 18, 2022
    Assignee: The University of British Columbia
    Inventors: Xiaodong Lu, Irfan-Ur-Rab Usman
  • Publication number: 20210401725
    Abstract: A polymer blend is provided comprising: (A) multistage polymer, comprising: acrylate rich stage comprising: structural units of monoethylenically unsaturated non-ionic, acrylate rich stage monomer selected from C1-22 alkyl (meth)acrylates and mixtures thereof; and carbosiloxane rich stage, comprising: structural units of carbosiloxane monomer of formula (I); and (B) silicone-grafted vinyl copolymer, wherein the silicone-grafted vinyl copolymer, comprises: structural units of a vinyl (B) monomer; and structural units of a carbosiloxane dendrimer of formula (V). Also provided are personal care formulations comprising the polymer blend.
    Type: Application
    Filed: December 3, 2019
    Publication date: December 30, 2021
    Inventors: Fanwen Zeng, Hilda G. Buss, Matthew Jeletic, Xiaodong Lu, Tian Lan, Isabelle Van Reeth, Helene Dihang, Marc Eeman, Bryan L. McCulloch, Jodi Mecca, Ralph C. Even, Inna Shulman, Michaeleen L. Pacholski
  • Patent number: 11196329
    Abstract: Aspects of the invention provide methods and systems for moving moveable stages relative to a stator. A stator is operationally divided into multiple stator tiles. The movement of the one or more moveable stages is controlled by a plurality of controllers (each assigned particular control responsibilities). A controller is provided for each stator sector, where each stator sector comprises a group of one or more stator tiles. Controllers from neighboring sectors share various information to facilitate controllable movement of one or more moveable stages relative to the stator.
    Type: Grant
    Filed: July 28, 2020
    Date of Patent: December 7, 2021
    Assignee: The University of British Columbia
    Inventor: Xiaodong Lu
  • Publication number: 20210376777
    Abstract: A system is described in which a magnetic mover includes at least one mover identification device. The system also includes a stator defining a work surface and including an actuation coil assembly and at least one stator identification device operable to interact with the at least one mover identification device. One or more sensors are used to sense a position of the first magnetic mover. One or more stator driving circuits are used to drive the actuation coil assembly to thereby move the first magnetic mover over the work surface. The first magnetic mover includes one or more magnetic components positioned such that interaction of one or more magnetic fields emitted by the one or more magnetic components with one or more magnetic fields generated by the actuation coil assembly when driven by the one or more stator driving circuits enables movement of the first magnetic mover in at least two degrees of freedom.
    Type: Application
    Filed: October 4, 2019
    Publication date: December 2, 2021
    Inventors: Xiaodong Lu, Yao Kevin Xiao
  • Publication number: 20210353524
    Abstract: A personal care formulation is provided comprising: multistage polymer, comprising: acrylate rich stage comprising: (a) structural units of monoethylenically unsaturated non-ionic, acrylate rich stage monomer selected from C1-22 alkyl (meth)acrylates and mixtures thereof; and (b) carbosiloxane rich stage, comprising: structural units of carbosiloxane monomer of formula (I), wherein a is 0 to 3; wherein d is 0 or 1; wherein R1 is selected from hydrogen, C1-10 alkyl group and aryl group; wherein R2 is selected from hydrogen and C1-10 alkyl group; wherein R8 is —O—Si(CH3)2—O—Si(CH3)3 group; wherein Y is selected from formula (II), (III) and (IV); wherein R4 and R6 are selected from hydrogen and methyl group; wherein R3 and R5 are a C1-10 alkylene group; wherein R7 is C1-10 alkyl group; wherein b is 0 to 4 and wherein c is 0 or 1.
    Type: Application
    Filed: December 3, 2019
    Publication date: November 18, 2021
    Inventors: Fanwen Zeng, Hilda G. Buss, Matthew Jeletic, Xiaodong Lu, Tian Lan, Isabelle Van Reeth, Helene Dihang, Marc Eeman, Bryan L. McCulloch, Jodi Mecca, Ralph C. Even, Inna Shulman, Michaeleen L. Pacholski
  • Publication number: 20210308035
    Abstract: A color cosmetic formulation is provided comprising: a color ingredient and a polymer blend, comprising: a single stage polymer and a silicone-grafted vinyl copolymer; wherein the single stage polymer comprises: structural units of a monoethylenically unsaturated non-ionic monomer; structural units of a monoethylenically unsaturated carboxylic acid monomer; and structural units of a multiethylenically unsaturated monomer having at least two ethylenically unsaturated groups per molecule; and wherein the silicone-grafted vinyl copolymer, comprises: structural units of a vinyl monomer; and structural units of a carbosiloxane dendrimer of formula (I).
    Type: Application
    Filed: October 1, 2019
    Publication date: October 7, 2021
    Inventors: Fanwen Zeng, Tian Lan, Xiaodong Lu, Isabelle Van Reeth, Helene Dihang, Marc Eeman, Inna Shulman
  • Publication number: 20210308036
    Abstract: A polymer blend is provided comprising: a single stage polymer and a silicone-grafted vinyl copolymer; wherein the single stage polymer comprises: structural units of a monoethylenically unsaturated non-ionic monomer; structural units of a monoethylenically unsaturated carboxylic acid monomer; and structural units of a multiethylenically unsaturated monomer having at least two ethylenically unsaturated groups per molecule; and wherein the silicone-grafted vinyl copolymer, comprises: structural units of a vinyl monomer; and structural units of a carbosiloxane dendrimer of formula (I). Also provided is a suncare formulation comprising the polymer blend in a dermatologically acceptable carrier with a suncare active.
    Type: Application
    Filed: October 1, 2019
    Publication date: October 7, 2021
    Inventors: Fanwen Zeng, Xiaodong Lu, Tian Lan, Isabelle Van Reeth, Helene Dihang, Marc Eeman, Inna Shulman
  • Publication number: 20210221008
    Abstract: Various embodiments relate to magnetically moveable displacement devices or robotic devices. Particular embodiments provide systems and corresponding methods for magnetically moving multiple movable robots relative to one or more working surfaces of respective one or more work bodies, and for moving robots between the one or more work bodies via transfer devices. Robots can carry one or more objects among different locations, manipulate carried objects, and/or interact with their surroundings for particular functionality including but not limited to assembly, packaging, inspection, 3D printing, test, laboratory automation, etc. A mechanical link may be mounted on planar motion units such as said robots.
    Type: Application
    Filed: January 25, 2021
    Publication date: July 22, 2021
    Inventors: Xiaodong LU, Peter TANG, Alexander H. SLOCUM, Rui CHEN
  • Patent number: 11058612
    Abstract: A multistage colored polymer particle is provided, having a core comprising polymerized units of a monoethylenically unsaturated carboxylic acid core monomer and a non-ionic ethylenically unsaturated core monomer; an inner shell comprising polymerized units of a non-ionic ethylenically unsaturated inner shell monomer; a monoethylenically unsaturated carboxylic acid inner shell monomer; optionally, an aliphatic inner shell monomer; and, optionally, a first polymerizable dye monomer; an outer shell comprising polymerized units of a non-ionic ethylenically unsaturated outer shell monomer; a monoethylenically unsaturated non-carboxylic acid outer shell monomer; optionally, a second polymerizable dye monomer; and, optionally, an aliphatic outer shell monomer; wherein the core, when dry, contains at least one void; and wherein the multistage colored polymer particle comprises polymerized units of polymerizable dye monomer.
    Type: Grant
    Filed: October 3, 2018
    Date of Patent: July 13, 2021
    Assignee: Rohm and Haas Company
    Inventors: Xiaodong Lu, Xiang Qian Liu, Fanwen Zeng, Junsi Gu, Wen-Shiue Young
  • Patent number: 10958148
    Abstract: A displacement device includes a stator having non-parallel stator-x and stator-y elongated traces. The device also includes a moveable stage having a first magnet array with first magnetization segments linearly elongated in a stage-x direction and having magnetization directions generally orthogonal to the stage-x direction. The first magnet array includes a first pair of adjacent first magnetization segments made up of two first magnetization segments adjacent to one another in a stage-y direction non-parallel to the stage-x direction. Each first magnetization segment in the first pair has a corresponding magnetization direction oriented at a corresponding angle ?n about a corresponding stage-x axis as measured from a positive stage-z direction that is generally orthogonal to both the stator-x and stator-y directions. The corresponding angle ?n is one of 45°+n90° where n is any integer. Each first magnetization segment in the first pair has a different magnetization direction.
    Type: Grant
    Filed: May 29, 2020
    Date of Patent: March 23, 2021
    Assignee: The University of British Columbia
    Inventor: Xiaodong Lu
  • Publication number: 20210083562
    Abstract: Aspects of the invention provide methods and systems for moving a plurality of moveable stages relative to a stator. The stator comprises a plurality of coils shaped to provide pluralities of coil trace groups where each coil trace group comprises a corresponding plurality of generally linearly elongated coil traces which extend across a stator tile. Each moveable stage comprises a plurality of magnet arrays. Methods and apparatus are provided for moving the moveable stages relative to the stator, where a magnet array from a first moveable stage and a magnet array from a second moveable stage both overlap a shared group of coil traces. For at least a portion of the time that the magnet arrays from the first and second moveable stages overlap the shared group of coil traces, currents are controllably driven in the shared coil trace group based on the positions of both the first and second moveable stages. The positions of the first and second moveable stages may be ascertained by feedback.
    Type: Application
    Filed: September 24, 2020
    Publication date: March 18, 2021
    Inventor: Xiaodong LU
  • Patent number: 10926418
    Abstract: Various embodiments relate to magnetically moveable displacement devices or robotic devices. Particular embodiments provide systems and corresponding methods for magnetically moving multiple movable robots relative to one or more working surfaces of respective one or more work bodies, and for moving robots between the one or more work bodies via transfer devices. Robots can carry one or more objects among different locations, manipulate carried objects, and/or interact with their surroundings for particular functionality including but not limited to assembly, packaging, inspection, 3D printing, test, laboratory automation, etc. A mechanical link may be mounted on planar motion units such as said robots.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: February 23, 2021
    Inventors: Xiaodong Lu, Peter Tang, Alexander H. Slocum, Rui Chen
  • Publication number: 20210013787
    Abstract: Aspects of the invention provide methods and systems for moving moveable stages relative to a stator. A stator is operationally divided into multiple stator tiles. The movement of the one or more moveable stages is controlled by a plurality of controllers (each assigned particular control responsibilities). A controller is provided for each stator sector, where each stator sector comprises a group of one or more stator tiles. Controllers from neighboring sectors share various information to facilitate controllable movement of one or more moveable stages relative to the stator.
    Type: Application
    Filed: July 28, 2020
    Publication date: January 14, 2021
    Inventor: Xiaodong LU
  • Publication number: 20200370925
    Abstract: Apparatus and method estimate a position of a movable stage. The apparatus comprises: a stator comprising 2D array of sensors arranged relative to one another to provide a plurality of stator-Y oriented sensor columns and a plurality of stator-X oriented sensor rows; a movable stage comprising a first Y-magnet array comprising a plurality of first magnetization segments generally linearly elongated in a stage-Y direction, each first magnetization segment having a stage-Y direction length, Lyy, and a magnetization direction generally orthogonal to the stage-Y direction, the magnetization directions of the plurality of first magnetization segments exhibiting a first magnetic spatial period ?x over a stage-X direction width, Wyx, of the first magnet array; and a controller connected to receive information based on an output from each of the sensors and configured to use the information to determine a stator-X direction position of the movable stage.
    Type: Application
    Filed: May 29, 2020
    Publication date: November 26, 2020
    Inventor: Xiaodong LU
  • Publication number: 20200366179
    Abstract: A displacement device comprises a stator comprising non-parallel stator-x and stator-y elongated traces. The device comprises a moveable stage comprising a first magnet array comprising first magnetization segments linearly elongated in a stage-x direction and having magnetization directions generally orthogonal to the stage-x direction. The first magnet array comprises a first pair of adjacent first magnetization segments comprising two first magnetization segments adjacent to one another in a stage-y direction non-parallel to the stage-x direction. Each first magnetization segment in the first pair has a corresponding magnetization direction oriented at a corresponding angle ?n about a corresponding stage-x axis as measured from a positive stage-z direction that is generally orthogonal to both the stator-x and stator-y directions. The corresponding angle ?n is one of 45°+n90° where n is any integer. Each first magnetization segment in the first pair has a different magnetization direction.
    Type: Application
    Filed: May 29, 2020
    Publication date: November 19, 2020
    Inventor: Xiaodong LU
  • Publication number: 20200337951
    Abstract: A method for lightening skin tone is provided, comprising topically administering a personal care composition comprising: (A) voided latex particles comprising (i) a core polymer comprising (a) 20 to 60 weight % of monoethylenically unsaturated monomers containing a carboxylic acid group, and (b) 40 to 80 weight % of non-ionic ethylenically unsaturated monomers; and (ii) a shell polymer comprising (a) 55 to 85 weight % of non-ionic ethylenically unsaturated monomers, and (b) 15 to 45 weight % of polyethylenically unsaturated monomers; (B) 0.1 to 10 weight % of pigment grade inorganic metal oxide particles having a particle size of 250 nm to 1,000 nm; (C) a dermatologically acceptable carrier; and (D) an emollient, wherein the voided latex particles are present in at 0.5 to 10 weight %, based on weight of the composition, contain a void and have a particle size of 400 nm to 1500 nm.
    Type: Application
    Filed: July 6, 2020
    Publication date: October 29, 2020
    Inventors: Junsi Gu, Jennifer Koenig, Xiang Qian Liu, Xiaodong Lu, Ying O'Connor, Curtis Schwartz, Xindi Yu, Fanwen Zeng
  • Patent number: 10819205
    Abstract: Aspects of the invention provide methods and systems for moving a plurality of moveable stages relative to a stator. The stator comprises a plurality of coils shaped to provide pluralities of coil trace groups where each coil trace group comprises a corresponding plurality of generally linearly elongated coil traces which extend across a stator tile. Each moveable stage comprises a plurality of magnet arrays. Methods and apparatus are provided for moving the moveable stages relative to the stator, where a magnet array from a first moveable stage and a magnet array from a second moveable stage both overlap a shared group of coil traces. For at least a portion of the time that the magnet arrays from the first and second moveable stages overlap the shared group of coil traces, currents are controllably driven in the shared coil trace group based on the positions of both the first and second moveable stages. The positions of the first and second moveable stages may be ascertained by feedback.
    Type: Grant
    Filed: May 31, 2019
    Date of Patent: October 27, 2020
    Assignee: The University of British Columbia
    Inventor: Xiaodong Lu
  • Publication number: 20200335104
    Abstract: In a method for determining a dialog state, first dialog information is obtained. The first dialog information is dialog information inputted during a dialog process. Based on the first dialog information, target scenario information corresponding to the first dialog information is determined. The target scenario information is used to indicate a dialog scenario of the first dialog information. Based on the first dialog information and the target scenario information, a first dialog state corresponding to the first dialog information is obtained. The first dialog state is used to represent a response mode for responding to the first dialog information.
    Type: Application
    Filed: July 6, 2020
    Publication date: October 22, 2020
    Applicant: Tencent Technology (Shenzhen) Company Limited
    Inventor: Xiaodong LU