Patents by Inventor Xiaolei Liu

Xiaolei 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: 20150085363
    Abstract: In one example, a camera is provided that includes: a plurality of MEMS electrostatic comb actuators, each actuator operable to exert a force on at least one lens; and an optical image stabilization (OIS) algorithm module operable to command the plurality of actuators to actuate the at least one lens responsive to motion of the camera.
    Type: Application
    Filed: October 6, 2014
    Publication date: March 26, 2015
    Inventors: Xiaolei Liu, Roman C. Gutierrez, Pat K. Leang, Jose A. Mendez, Corneliu Zaharia, Alexandru F. Drimbarean, Petronel Gheorghe Bigioi
  • Publication number: 20150070793
    Abstract: In one embodiment, an electrostatic actuator includes a generally planar fixed frame, a generally planar moving frame coupled to the fixed frame by a flexure for substantially coplanar, perpendicular movement relative to the fixed frame, a plurality of interdigitated teeth, a fixed portion of which is attached to the fixed frame and a moving portion of which is attached to the moving frame, and an elongated output shaft having opposite input and output ends, the input end being coupled to the moving frame.
    Type: Application
    Filed: November 17, 2014
    Publication date: March 12, 2015
    Inventors: Robert J. Calvet, Guiqin Wang, Roman C. Gutierrez, Xiaolei Liu
  • Patent number: 8947797
    Abstract: In one embodiment, an electrostatic actuator includes a generally planar fixed frame, a generally planar moving frame coupled to the fixed frame by a flexure for substantially coplanar, perpendicular movement relative to the fixed frame, a plurality of interdigitated teeth, a fixed portion of which is attached to the fixed frame and a moving portion of which is attached to the moving frame, and an elongated output shaft having opposite input and output ends, the input end being coupled to the moving frame.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: February 3, 2015
    Assignee: DigitalOptics Corporation MEMS
    Inventors: Robert J. Calvet, Guiqin Wang, Roman C. Gutierrez, Xiaolei Liu
  • Patent number: 8941192
    Abstract: A method for making an actuator device includes forming a substantially planar structure having a stage resiliently supported for movement within a plane of the structure, an actuator coupled to an outer periphery of the stage and operable to apply a force acting in the plane and tangentially to the stage when actuated, the actuator comprising a fixed frame and a moving frame resiliently supported for reciprocal movement relative to the fixed frame by a motion control flexure, and an outer frame surrounding and supporting the stage and the actuator. The moving frame is moved to a deployed position that is coplanar with, parallel to and spaced apart from the fixed frame at a selected distance, and the moving frame is then fixed at the deployed position for substantially rectilinear, perpendicular movement relative to the fixed frame.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: January 27, 2015
    Assignee: DigitalOptics Corporation MEMS
    Inventors: Robert J. Calvet, Xiaolei Liu, Ankur Jain, Lakshminarayan Hariharan, Roman C. Gutierrez
  • Patent number: 8891186
    Abstract: In one embodiment, an electrostatic actuator includes a generally planar fixed frame, a generally planar moving frame coupled to the fixed frame by a flexure for substantially coplanar, perpendicular movement relative to the fixed frame, a plurality of interdigitated teeth, a fixed portion of which is attached to the fixed frame and a moving portion of which is attached to the moving frame, and an elongated output shaft having opposite input and output ends, the input end being coupled to the moving frame.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: November 18, 2014
    Assignee: DigitalOptics Corporation MEMS
    Inventors: Robert J. Calvet, Guigin Wang, Roman C. Gutierrez, Xiaolei Liu
  • Patent number: 8855476
    Abstract: In one example, a camera is provided that includes: a plurality of MEMS electrostatic comb actuators, each actuator operable to exert a force on at least one lens; and an optical image stabilization (OIS) algorithm module operable to command the plurality of actuators to actuate the at least one lens responsive to motion of the camera.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: October 7, 2014
    Assignee: DigitalOptics Corporation MEMS
    Inventors: Xiaolei Liu, Roman C. Gutierrez, Pat K. Leang, Jose A. Mendez, Corneliu Zaharia, Alexandru F. Drimbarean, Petronel Gheorghe Bigioi
  • Patent number: 8829789
    Abstract: An electrode for use in an organic optoelectronic device is provided. The electrode includes a thin film of single-wall carbon nanotubes. The film may be deposited on a substrate of the device by using an elastomeric stamp. The film may be enhanced by spin-coating a smoothing layer on the film and/or doping the film to enhance conductivity. Electrodes according to the present invention may have conductivities, transparencies, and other features comparable to other materials typically used as electrodes in optoelectronic devices.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: September 9, 2014
    Assignee: The University of Southern California
    Inventors: Daihua Zhang, Koungmin Ryu, Xiaolei Liu, Evgueni Polikarpov, James Ly, Mark E. Thompson, Chongwu Zhou, Cody Schlenker
  • Publication number: 20140191763
    Abstract: The present disclosure provides a detection device for lithium-ion battery, which comprises an insulative housing having a receiving chamber; an insulative separator positioned between the positive electrode sheet and the negative electrode sheet when the positive electrode sheet and the negative electrode sheet are received in the receiving chamber; a positive electrode sheet conductive fastener passing through the insulative housing and fixedly connected to a positive electrode current collector at a positive electrode current collector non-film-coating region; a negative electrode sheet conductive fastener passing through the insulative housing and fixedly connected to a negative electrode current collector at a negative electrode current collector non-film-coating region; an insulative cover engaged with the insulative housing and the insulative separator; a positive electrode region detection hole communicated to the positive electrode sheet gas region; and a negative electrode region detection hole comm
    Type: Application
    Filed: January 3, 2014
    Publication date: July 10, 2014
    Applicant: Ningde Amperex Technology Limited
    Inventors: Junzhong Hu, Chengyou Xing, Pinghua Deng, Yanhua Lu, Xiaolei Liu
  • Publication number: 20140154534
    Abstract: The invention pertains to the field of power battery technology, in particular to a power battery safety head cover, comprising a cover plate, a positive pole, a negative pole, a pressure release valve and a filling hole, wherein the positive pole, the negative pole, the pressure release valve and the filling hole are arranged on the cover plate, the positive pole is electrically connected with the cover plate, the negative pole is assembled with the cover plate in an insulating way, and the negative pole is connected with a negative temperature coefficient thermistor.
    Type: Application
    Filed: February 22, 2013
    Publication date: June 5, 2014
    Applicant: NingDe Amperex Technology Limited
    Inventors: Xiaolei Liu, Pinghua Deng, Peng Wang, Yanhua Lu, Junzhong Hu
  • Patent number: 8736950
    Abstract: A flexure assembly can have a stage that is deployed to a desired position by attachment of the flexure assembly to a housing. For example, a frame can be configured to be held in position by one portion of the housing and a deployment pad can be configured to be held in position by another portion of the housing. A deployment flexure can be configured to facilitate positioning of the frame and the deployment pad out-of-plane with respect to one another. The deployment flexure and a motion control flexure can facilitate movement of the stage with respect to the housing. In this manner, the position of the stage and the preload of the stage are determined by the housing.
    Type: Grant
    Filed: October 15, 2012
    Date of Patent: May 27, 2014
    Assignee: DigitalOptics Corporation MEMS
    Inventors: Robert J. Calvet, Roman C. Gutierrez, Xiaolei Liu, Ankur Jain
  • Publication number: 20140116163
    Abstract: A device can have an outer frame and an actuator. The actuator can have a movable frame and a fixed frame. At least one torsional flexure and at least one hinge flexure can cooperate to provide comparatively high lateral stiffness between the outer frame and the movable frame and can cooperate to provide comparatively low rotational stiffness between the outer frame and the movable frame.
    Type: Application
    Filed: December 9, 2013
    Publication date: May 1, 2014
    Applicant: DigitalOptics Corporation MEMS
    Inventors: Roman C. Gutierrez, Robert J. Calvet, Ankur Jain, Xiaolei Liu, Guiqin Wang
  • Patent number: 8712229
    Abstract: In one embodiment, an actuator includes a moving frame coupled to a fixed frame by a plurality of elongated parallel motion flexures for generally parallel motion relative to the fixed frame and between an as-fabricated position and a deployed position. The flexures are disposed at a first angle relative to a line extending perpendicularly to both the moving frame and the fixed frame when the moving frame is disposed in the as-fabricated position, and at a second angle relative to that same line when the moving frame is disposed in the deployed position. Arcuate movement of the first frame relative to the second frame is controlled by constraining the first angle to a value of less than about half of the sum of the first and second angles.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: April 29, 2014
    Assignee: DigitalOptics Corporatin MEMS
    Inventors: Robert J. Calvet, Xiaolei Liu, Roman C. Gutierrez, Ankur Jain, Guiqin Wang
  • Publication number: 20140104764
    Abstract: A method for making an actuator includes forming a substantially planar actuator device of an electrically conductive material, the device incorporating an outer frame, a fixed frame attached to the outer frame, a moveable frame disposed parallel to the fixed frame, a motion control flexure coupling the moveable frame to the outer frame for coplanar, rectilinear movement relative to the outer frame and the fixed frame, an actuator incorporating a plurality of interdigitated teeth, a fixed portion of which is attached to the fixed frame and a moving portion of which is attached to the moveable frame, moving the moveable frame to a deployed position that is coplanar with, parallel to and spaced a selected distance apart from the fixed frame, and fixing the moveable frame at the deployed position for substantially rectilinear, perpendicular movement relative to the fixed frame.
    Type: Application
    Filed: December 16, 2013
    Publication date: April 17, 2014
    Applicant: DigitalOptics Corporation MEMS
    Inventors: Roman C. Gutierrez, Robert J. Calvet, Xiaolei Liu
  • Patent number: 8608393
    Abstract: A method for making an actuator includes forming a substantially planar actuator device of an electrically conductive material, the device incorporating an outer frame, a fixed frame attached to the outer frame, a moveable frame disposed parallel to the fixed frame, a motion control flexure coupling the moveable frame to the outer frame for coplanar, rectilinear movement relative to the outer frame and the fixed frame, an actuator incorporating a plurality of interdigitated teeth, a fixed portion of which is attached to the fixed frame and a moving portion of which is attached to the moveable frame, moving the moveable frame to a deployed position that is coplanar with, parallel to and spaced a selected distance apart from the fixed frame, and fixing the moveable frame at the deployed position for substantially rectilinear, perpendicular movement relative to the fixed frame.
    Type: Grant
    Filed: November 15, 2010
    Date of Patent: December 17, 2013
    Assignee: DigitalOptics Corporation MEMS
    Inventors: Roman C. Gutierrez, Robert J. Calvet, Xiaolei Liu
  • Patent number: 8604663
    Abstract: A device can have an outer frame and an actuator. The actuator can have a movable frame and a fixed frame. At least one torsional flexure and at least one hinge flexure can cooperate to provide comparatively high lateral stiffness between the outer frame and the movable frame and can cooperate to provide comparatively low rotational stiffness between the outer frame and the movable frame.
    Type: Grant
    Filed: November 15, 2010
    Date of Patent: December 10, 2013
    Assignee: DigitalOptics Corporation MEMS
    Inventors: Roman C. Gutierrez, Robert J. Calvet, Ankur Jain, Xiaolei Liu, Guiqin Wang
  • Patent number: 8581963
    Abstract: A method and system for hiding objectionable frames during autofocusing are disclosed. A personal electronic device such as a cameral telephone can have two cameras that have overlapping fields of view. One camera can provide imaging. The other camera can facilitate autofocusing in a manner wherein images produced thereby are not viewed by a user. Because the autofocus frames are hidden, the user is not distracted or annoying thereby.
    Type: Grant
    Filed: October 15, 2012
    Date of Patent: November 12, 2013
    Assignee: DigitalOptics Corporation MEMS
    Inventors: Richard Tsai, Xiaolei Liu
  • Publication number: 20130278108
    Abstract: Techniques are disclosed for systems and methods to provide shock impact mitigation for MEMS structures. A MEMS structure may include one or more actuators. An actuator may include a first frame having a spine, where the spine includes a body and a tip. The actuator may include a second frame connected to the first frame and including a shock stop, where the shock stop includes a surface in proximity to the spine tip. An actuator may include a shock cushion spring fixed relative to the spine tip and situated substantially between the spine tip and the shock stop surface, where the shock cushion spring is adapted to protect the spine tip from contact with the shock stop surface.
    Type: Application
    Filed: March 15, 2013
    Publication date: October 24, 2013
    Inventors: Xiaolei Liu, Xiaojun Huang, Robert J. Calvet
  • Publication number: 20130279030
    Abstract: In one embodiment, an electrostatic actuator includes a generally planar fixed frame, a generally planar moving frame coupled to the fixed frame by a flexure for substantially coplanar, perpendicular movement relative to the fixed frame, a plurality of interdigitated teeth, a fixed portion of which is attached to the fixed frame and a moving portion of which is attached to the moving frame, and an elongated output shaft having opposite input and output ends, the input end being coupled to the moving frame.
    Type: Application
    Filed: March 15, 2013
    Publication date: October 24, 2013
    Inventors: Robert J. Calvet, Guiqin Wang, Roman C. Gutierrez, Xiaolei Liu
  • Patent number: 8536664
    Abstract: A MEMS device can include an actuator, a base formed from a substrate, and a plurality of memory cells integrated with the base. At least a portion of the base can be configured to move in response to the actuator. A miniature camera can include a base comprising a frame, a stage, and a plurality of flexures configured to connect the stage with the frame. The flexures can be adapted to bend to permit the stage to move relative to the frame. The camera can include a plurality of memory cells integrated with the base, a lens mount secured to the stage, a lens barrel secured to the lens mount, an image sensor, and an actuator adapted to move the stage relative to the frame and the image sensor.
    Type: Grant
    Filed: April 16, 2007
    Date of Patent: September 17, 2013
    Assignee: DigitalOptics Corporation MEMS
    Inventors: Richard Tsai, Xiaolei Liu
  • Patent number: 8488260
    Abstract: A flexure system for miniature camera and the like is disclosed. The flexure system can include a frame and a stage that is configured to move with respect to the frame. One or more flexures can interconnect the frame and the stage. Each flexure can have one or more film hinges formed thereon. The film hinges can be widely spaced and/or extended in length so as to substantially mitigate undesirable pitching of the stage.
    Type: Grant
    Filed: June 28, 2011
    Date of Patent: July 16, 2013
    Assignee: DigitalOptics Corporation MEMS
    Inventors: Robert J. Calvet, Xiaolei Liu, Ankur Jain