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: 20190171032
    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: February 11, 2019
    Publication date: June 6, 2019
    Applicant: 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: 10302471
    Abstract: A device for observing the changes in abyssal flow based on differential pressure measurement, includes differential pressure sensing chamber and base connected through communicating portion, controller provided inside communicating portion, floating body and releasing device. Floating body is located on differential pressure sensing chamber and retracted through releasing device. Sensing chamber includes ambient water pressure chamber in communication with hydrostatic pressure chamber. Communicating portion is blocked by spring sheet. The spring sheet is provided with optical fiber sensor. Hydrostatic pressure chamber is always in communication with seawater, and ambient water pressure chamber is always in communication with water in abyssal sedimentary layer. Releasing device includes electric winch provided with acoustic signal device. Base is provided with earth pressure sensor and weight member. Optical fiber sensor, acoustic signal device, and earth pressure sensor are connected with controller.
    Type: Grant
    Filed: February 1, 2019
    Date of Patent: May 28, 2019
    Assignee: OCEAN UNIVERSITY OF CHINA
    Inventors: Tao Liu, Guanli Wei, Lei Guo, Xiuqing Yang, Xiujun Guo, Dong Wang, Yonggang Jia, Minsheng Zhang, Qingsheng Meng, Xiaolei Liu, Yongmao Zhu, Jia Xin
  • Publication number: 20190157988
    Abstract: An apparatus is provided. The apparatus includes a bidirectional comb drive actuator. The apparatus may also include a cantilever. The cantilever includes a first end connected to the bidirectional comb drive actuator and a second end connected to an inner frame. In addition, the cantilever may include first and second conductive layers for routing electrical signals. Embodiments of the disclosed apparatuses, which may include multi-dimensional actuators, allow for an increased number of electrical signals to be routed to the actuators. Moreover, the disclosed apparatuses allow for actuation multiple directions, which may provide for increased control, precision, and flexibility of movement. Accordingly, the disclosed embodiments provide significant benefits with regard to optical image stabilization and auto-focus capabilities, for example in size- and power-constrained environments.
    Type: Application
    Filed: January 18, 2019
    Publication date: May 23, 2019
    Inventors: Xiaolei Liu, Roman Gutierrez, Matthew Ng, Guiqin Wang
  • Publication number: 20190157989
    Abstract: An apparatus is provided. The apparatus includes a bidirectional comb drive actuator. The apparatus may also include a cantilever. The cantilever includes a first end connected to the bidirectional comb drive actuator and a second end connected to an inner frame. In addition, the cantilever may include first and second conductive layers for routing electrical signals. Embodiments of the disclosed apparatuses, which may include multi-dimensional actuators, allow for an increased number of electrical signals to be routed to the actuators. Moreover, the disclosed apparatuses allow for actuation multiple directions, which may provide for increased control, precision, and flexibility of movement. Accordingly, the disclosed embodiments provide significant benefits with regard to optical image stabilization and auto-focus capabilities, for example in size- and power-constrained environments.
    Type: Application
    Filed: January 18, 2019
    Publication date: May 23, 2019
    Inventors: Xiaolei Liu, Roman Gutierrez, Matthew Ng, Guiqin Wang
  • Publication number: 20190152764
    Abstract: Shock-resistant MEMS structures are disclosed. In one implementation, a motion control flexure for a MEMS device includes: a rod including a first and second end, wherein the rod is tapered along its length such that it is widest at its center and thinnest at its ends; a first hinge directly coupled to the first end of the rod; and a second hinge directly coupled to the second of the rod. In another implementation, a conductive cantilever for a MEMS device includes: a curved center portion includes a first and second end, wherein the center portion has a point of inflection; a first root coupled to the first end of the center portion; and a second root coupled to the second end of the center portion. In yet another implementation, a shock stop for a MEMS device is described.
    Type: Application
    Filed: January 18, 2019
    Publication date: May 23, 2019
    Inventors: Gerardo Morabito, Xiaolei Liu, Guiqin Wang, Roman Gutierrez, Matthew Ng
  • Publication number: 20190152765
    Abstract: Shock-resistant MEMS structures are disclosed. In one implementation, a motion control flexure for a MEMS device includes: a rod including a first and second end, wherein the rod is tapered along its length such that it is widest at its center and thinnest at its ends; a first hinge directly coupled to the first end of the rod; and a second hinge directly coupled to the second of the rod. In another implementation, a conductive cantilever for a MEMS device includes: a curved center portion includes a first and second end, wherein the center portion has a point of inflection; a first root coupled to the first end of the center portion; and a second root coupled to the second end of the center portion. In yet another implementation, a shock stop for a MEMS device is described.
    Type: Application
    Filed: January 18, 2019
    Publication date: May 23, 2019
    Inventors: Gerardo Morabito, Xiaolei Liu, Guiqin Wang, Roman Gutierrez, Matthew Ng
  • Patent number: 10284051
    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: April 3, 2017
    Date of Patent: May 7, 2019
    Assignee: DigitalOptics Corporation MEMS
    Inventors: Roman C. Gutierrez, Robert J. Calvet, Xiaolei Liu, Ankur Jain, Guiqin Wang
  • Publication number: 20190132675
    Abstract: A temperature detecting and controlling integration device for the micro speaker is provdied. After the filter receives an input signal, the power amplifier adjusts the power amplification, and the multi-frequency detection signal is generated with the waveform generator. The extracted signal is generated to drive the micro speaker to emit a sound signal. Afterwards, the voltage signals are extracted at two ends of the coil and the temperature signal is obtained by converting, capturing, and integrating to pass the temperature value to the external device, and the temperature value of the non-linear temperature-controlling unit is analyzed to adjust the compensation gain in real time. The smoothly control of speaker temperature and stable playback of the sound signals is played that can be achieved.
    Type: Application
    Filed: August 31, 2018
    Publication date: May 2, 2019
    Inventors: Xuexin DING, Weiji LIU, Jian XU, Lin ZHANG, Xiaolei LIU, Yingshun JIANG, Fangkang SHEN
  • Patent number: 10259702
    Abstract: Caging structures are disclosed for caging or otherwise reducing the mechanical shock pulse experienced by MEMS device beam structures during events that may cause mechanical shock to the MEMS device. The caging structures at least partially surround the beam such that they limit the motion of the beam in a direction perpendicular to the beam's longitudinal axis, thereby reducing stress on the beam during a mechanical shock event. The caging structures may be used in combination with mechanical shock-resistant beams.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: April 16, 2019
    Assignee: MEMS Drive, Inc.
    Inventors: Xiaolei Liu, Matthew Ng, Robert Calvet, Gerardo Morabito
  • Patent number: 10211757
    Abstract: An apparatus is provided. The apparatus includes a bidirectional comb drive actuator. The apparatus may also include a cantilever. The cantilever includes a first end connected to the bidirectional comb drive actuator and a second end connected to an inner frame. In addition, the cantilever may include first and second conductive layers for routing electrical signals. Embodiments of the disclosed apparatuses, which may include multi-dimensional actuators, allow for an increased number of electrical signals to be routed to the actuators. Moreover, the disclosed apparatuses allow for actuation multiple directions, which may provide for increased control, precision, and flexibility of movement. Accordingly, the disclosed embodiments provide significant benefits with regard to optical image stabilization and auto-focus capabilities, for example in size- and power-constrained environments.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: February 19, 2019
    Assignee: MEMS Drive, Inc.
    Inventors: Xiaolei Liu, Roman Gutierrez, Matthew Ng, Guiqin Wang
  • Patent number: 10203515
    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: May 30, 2017
    Date of Patent: February 12, 2019
    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: 10199262
    Abstract: A system and method for manipulating the structural characteristics of a MEMS device include etching a plurality of holes into the surface of a MEMS device, wherein the plurality of holes comprise one or more geometric shapes determined to provide specific structural characteristics desired in the MEMS device.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: February 5, 2019
    Assignee: MEMS Drive, Inc.
    Inventors: Roman Gutierrez, Tony Tang, Xiaolei Liu, Guiqin Wang, Matthew Ng
  • Patent number: 10196259
    Abstract: Shock-resistant MEMS structures are disclosed. In one implementation, a motion control flexure for a MEMS device includes: a rod including a first and second end, wherein the rod is tapered along its length such that it is widest at its center and thinnest at its ends; a first hinge directly coupled to the first end of the rod; and a second hinge directly coupled to the second of the rod. In another implementation, a conductive cantilever for a MEMS device includes: a curved center portion includes a first and second end, wherein the center portion has a point of inflection; a first root coupled to the first end of the center portion; and a second root coupled to the second end of the center portion. In yet another implementation, a shock stop for a MEMS device is described.
    Type: Grant
    Filed: December 30, 2015
    Date of Patent: February 5, 2019
    Assignee: MEMS Drive, Inc.
    Inventors: Gerardo Morabito, Xiaolei Liu, Guiqin Wang, Roman Gutierrez, Matthew Ng
  • Patent number: 10160641
    Abstract: A simplified MEMS fabrication process and MEMS device is provided that allows for cheaper and lighter-weight MEMS devices to be fabricated. The process comprises etching a plurality of holes or other feature patterns into a MEMS device, and then etching away the underlying wafer such that, after the etching process, the MEMS device is the required thickness and the individual die are separated, avoiding the extra steps of wafer thinning and die dicing. By etching trenches into the substrate wafer and filling them with a MEMS base material, sophisticated taller MEMS devices with larger force may be made.
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: December 25, 2018
    Assignee: MEMS Drive, Inc.
    Inventors: Roman Gutierrez, Tony Tang, Xiaolei Liu, Matthew Ng, Guiqin Wang
  • Patent number: 10071903
    Abstract: A flexure includes a support first end connected to a first frame; a support second end connected to a second frame; and a buckled section connecting the first support end to the second support end. The length of the flexure is substantially greater than its width, and the width of the flexure is substantially greater than its thickness. During operation, the flexure is maintained in a buckled state where the flexure's stiffness is significantly less than in the unbuckled state. In one implementation, a stage includes a flexure array joining a first frame and a second frame, where: the first frame and the second frame are substantially on a plane; the flexure array is substantially on the plane prior to buckling by the flexures of the flexure array; and the flexure array is bent substantially out of the plane after buckling by the flexures.
    Type: Grant
    Filed: April 2, 2015
    Date of Patent: September 11, 2018
    Assignee: MEMS Drive, Inc.
    Inventors: Xiaolei Liu, Roman Gutierrez, Guiqin Wang, Benson Mai, Matthew Ng
  • Patent number: 10043704
    Abstract: A system and method for manipulating the structural characteristics of a MEMS device include etching a plurality of holes into the surface of a MEMS device, wherein the plurality of holes comprise one or more geometric shapes determined to provide specific structural characteristics desired in the MEMS device.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: August 7, 2018
    Assignee: MEMS Drive, Inc.
    Inventors: Roman Gutierrez, Tony Tang, Xiaolei Liu, Guiqin Wang, Matthew Ng
  • Patent number: 10033303
    Abstract: A package for moving a platform in six degrees of freedom, is provided. The platform may include an optoelectronic device mounted thereon. The package includes an in-plane actuator which may be a MEMS actuator and an out-of-plane actuator which may be formed of a piezoelectric element. The in-plane MEMS actuator may be mounted on the out-of-plane actuator mounted on a recess in a PCB. The in-plane MEMS actuator includes a plurality comb structures in which fingers of opposed combs overlap one another, i.e. extend past each other's ends. The out-of-plane actuator includes a central portion and a plurality of surrounding stages that are connected to the central portion. The in-plane MEMS actuator is coupled to the out-of-plane Z actuator to provide three degrees of freedom to the payload which may be an optoelectronic device included in the package.
    Type: Grant
    Filed: January 23, 2017
    Date of Patent: July 24, 2018
    Assignee: MEMS Drive, Inc.
    Inventors: Xiaolei Liu, Guiqin Wang, Matthew Ng
  • Publication number: 20180076737
    Abstract: A micro-electrical-mechanical system (MEMS) actuator includes a first set of actuation fingers, a second set of actuation fingers, and a first spanning structure configured to couple at least two fingers of the first set of actuation fingers while spanning at least one finger of the second set of actuation fingers.
    Type: Application
    Filed: September 8, 2017
    Publication date: March 15, 2018
    Inventors: Xiaolei Liu, Matthew Ng, Guiqin Wang
  • Publication number: 20180076740
    Abstract: A micro-electrical-mechanical system (MEMS) actuator includes: a MEMS actuation core, and a multi-piece MEMS electrical connector assembly electrically coupled to the MEMS actuation core and configured to be electrically coupled to a printed circuit board, wherein the multi-piece MEMS electrical connector includes: a plurality of subcomponents, and a plurality of coupling assemblies configured to couple the plurality of subcomponents together.
    Type: Application
    Filed: September 8, 2017
    Publication date: March 15, 2018
    Inventors: XIAOLEI LIU, Matthew Ng, Guiqin Wang
  • Publication number: 20180072561
    Abstract: A micro-electrical-mechanical system (MEMS) cantilever assembly includes an intermediary cantilever portion, a main cantilever arm configured to couple a moveable portion of a micro-electrical-mechanical system (MEMS) and the intermediary cantilever portion, and a plurality of intermediary links configured to couple the intermediary cantilever portion to a portion of the micro-electrical-mechanical system (MEMS).
    Type: Application
    Filed: September 8, 2017
    Publication date: March 15, 2018
    Inventors: Xiaolei Liu, Matthew Ng, Guiqin Wang, Gerardo Morabito