Patents by Inventor Wenhua Zhang

Wenhua Zhang 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: 20110179866
    Abstract: Gyroscopes that can compensate frequency mismatch are provided. In this regard, a representative gyroscope, among others, includes a top substrate including an outermost structure, a first driving structure and a first sensing structure. The first driving structure and the first sensing structure are disposed within the outermost structure. The first driving structure and the first sensing structure include a first driving electrode and a first sensing electrode that are disposed on a bottom surface of the first driving structure and first sensing structure, respectively. A portion of the mass on the top surface of the first sensing structure is removed. The gyroscope further includes a bottom substrate that is disposed below the top substrate. The bottom substrate includes a second driving electrode and a second sensing electrode that are disposed on a top surface of the bottom substrate and below the first driving electrode and the first sensing electrode.
    Type: Application
    Filed: October 31, 2008
    Publication date: July 28, 2011
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Wenhua Zhang, Robert G. Walmsley
  • Patent number: 7966880
    Abstract: Encapsulated devices that can adjust the damping level within are provided. In this regard, a representative encapsulated device, among others, comprises a bottom substrate, a middle substrate that is disposed above the bottom substrate, and a top substrate that is disposed above the middle substrate. The middle substrate comprises an outermost structure and at least one damping device. The at least one damping device is supported to the outermost structure. At least one top gap and a bottom gap are formed between the at least one damping device and the top and bottom substrates, respectively. The at least one top gap has at least one cavity depth that is adapted to adjust the damping level of the encapsulated device.
    Type: Grant
    Filed: October 13, 2008
    Date of Patent: June 28, 2011
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Wenhua Zhang, Robert G. Walmsley, Peter George Hartwell
  • Publication number: 20110141546
    Abstract: A resonant cavity with tunable nanowire. The resonant cavity includes a substrate. The substrate is coupleable to an optical resonator structure. The resonant cavity also includes a plurality of nanowires formed on the substrate. The plurality of nanowires is actuated in response to an application of energy.
    Type: Application
    Filed: August 26, 2008
    Publication date: June 16, 2011
    Inventors: Sagi Varghese Mathai, Alexandre M. Bratkovski, Wenhua Zhang, Shih-Yuan Wang
  • Publication number: 20100257934
    Abstract: Gyroscopes using surface electrodes are provided. In this regard, a representative microelectromechanical systems (MEMS) gyroscope, among others, includes a top substrate and a bottom substrate. The top substrate includes an outermost structure that is open and enclosed and a first driving structure that is disposed within the outermost structure and includes first driving electrodes disposed on a bottom surface. The bottom substrate is disposed below the top substrate and includes second driving electrodes disposed on a top surface of the bottom substrate. The second driving electrodes are substantially aligned below the first driving electrodes such that a force can be applied to the first driving structure by an electrostatic force generated between the first and second driving electrodes. The first and second driving electrodes are also configured to provide a capacitance signal based on the movement of the first driving structure.
    Type: Application
    Filed: April 9, 2009
    Publication date: October 14, 2010
    Applicant: Hewlett-Packard Development Company, L.P.
    Inventors: Wenhua Zhang, Peter George Hartwell, Lennie K. Kiyama, Robert G. Walmsley
  • Publication number: 20100109579
    Abstract: A resonator includes a translator, a stator, and a control circuit. The control circuit is configured to provide first and second translator voltages and first through third stator voltages, wherein the translator is configured to move with respect to the stator at a resonant frequency of the resonator in response to the control circuit.
    Type: Application
    Filed: October 30, 2008
    Publication date: May 6, 2010
    Inventors: Robert G. Walmsley, Wenhua Zhang, Lennie K. Kiyama, Peter Hartwell
  • Publication number: 20100089153
    Abstract: Encapsulated devices that can adjust the damping level within are provided. In this regard, a representative encapsulated device, among others, comprises a bottom substrate, a middle substrate that is disposed above the bottom substrate, and a top substrate that is disposed above the middle substrate. The middle substrate comprises an outermost structure and at least one damping device. The at least one damping device is supported to the outermost structure. At least one top gap and a bottom gap are formed between the at least one damping device and the top and bottom substrates, respectively. The at least one top gap has at least one cavity depth that is adapted to adjust the damping level of the encapsulated device.
    Type: Application
    Filed: October 13, 2008
    Publication date: April 15, 2010
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Wenhua Zhang, Robert G. Walmsley, Peter George Hartwell
  • Patent number: 7681799
    Abstract: A method of reading code symbols using a digital image capture and processing system which includes: an image formation and detection subsystem; an illumination subsystem; an illumination control subsystem; a digital image processing subsystem; and an input/output subsystem; and a system control subsystem. In the illustrative embodiment, a micro-computing platform implements the digital image processing subsystem, the input/output subsystem and the system control subsystem. The micro-computing platform includes a microprocessor, a memory architecture, and a multi-tier modular software architecture responsive to the generation of a triggering event within the system. Triggering events can be generated by an automatic object detector or by a manually actuated trigger switch.
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: March 23, 2010
    Assignee: Metrologic Instruments, Inc.
    Inventors: Xiaoxun Zhu, Yong Liu, Ka Man Au, Rui Hou, Hongpeng Yu, Xi Tao, Liang Liu, Wenhua Zhang, Anatoly Kotlarsky
  • Patent number: 7637433
    Abstract: A digital image capture and processing system comprising an illumination measurement subsystem for measuring the level of illumination at a particular region of the field of view (FOV) of the system during object illumination and imaging operations, and producing and storing an illumination measure for achieving a desired spatial intensity in a digital image to be formed and detected by the image formation and detection subsystem. An illumination control subsystem uses the illumination measure to control a LED-based illumination array during object illumination and imaging operations. A programmed image processor supports an image-processing based illumination metering program, as well as processes digital images formed and detected by the image formation and detection subsystem so as to read or acquire information graphically represented in the digital images.
    Type: Grant
    Filed: May 11, 2007
    Date of Patent: December 29, 2009
    Assignee: Metrologic Instruments, Inc.
    Inventors: Xiaoxun Zhu, Yong Liu, Ka Man Au, Rui Hou, Hongpeng Yu, Xi Tao, Liang Liu, Wenhua Zhang, Anatoly Kotlarsky
  • Patent number: 7624926
    Abstract: A hand-supportable digital-imaging based system for reading bar code symbols involving: automatically detecting the presence of an object within a field of view FOV of the system, and in response thereto, automatically generating an image cropping zone (ICZ) framing pattern and projecting the ICZ framing pattern within the FOV and onto the detected object; visually aligning the code symbol on the detected object, within the ICZ framing pattern; manually actuating a trigger switch when the code symbol on the object is located within the ICZ framing pattern, and while the ICZ framing pattern and a field of illumination are being simultaneously projected onto the object during object illumination operations, forming and capturing a digital image of the code symbol on the detected object; automatically cropping the image pixels contained within the spatial boundaries of the ICZ framing pattern, from the pixels of the digital image; and decode processing the cropped image so as to read one or more 1D and/or 2D cod
    Type: Grant
    Filed: November 29, 2006
    Date of Patent: December 1, 2009
    Assignee: Metrologic Instruments, Inc.
    Inventors: Xiaoxun Zhu, Yong Liu, Ka Man Au, Rui Hou, Hongpeng Yu, Xi Tao, Liang Liu, Wenhua Zhang, Anatoly Kotlarsky
  • Patent number: 7611064
    Abstract: A digital-imaging based code symbol reading system comprising an image sensing array with a field of view (FOV), an illumination subsystem with an LED illumination array, an automatic illumination measurement subsystem, an illumination control subsystem, and programmed imager processor supporting an image-processing based illumination metering program. The automatic illumination measurement subsystem, employing a photodetector operating independently from the image sensing array, is used to automatically measure the illumination level at a particular region of the FOV and determine the illumination duration necessary to achieve a desired spatial intensity in the detected digital image.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: November 3, 2009
    Assignee: Metrologic Instruments, Inc.
    Inventors: Xiaoxun Zhu, Yong Liu, Ka Man Au, Rui Hou, Hongpeng Yu, Xi Tao, Liang Liu, Wenhua Zhang, Anatoly Kotlarsky
  • Patent number: 7604175
    Abstract: A method of reading bar code symbols using a digital-imaging based code symbol reading system employing an event-driven multi-tier modular software architecture and supporting automatic operating system login and loading of a bar code symbol reading application.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: October 20, 2009
    Assignee: Metrologic Instruments, Inc.
    Inventors: Xiaoxun Zhu, Yong Liu, Ka Man Au, Rui Hou, Hongpeng Yu, Xi Tao, Liang Liu, Wenhua Zhang, Anatoly Kotlarsky, Sankar Ghosh, Michael Schnee, Pasqual Spatafore, Thomas Amundsen, Sung Byun, Mark Schmidt, Garrett Russell, John Bonanno, C. Harry Knowles
  • Patent number: 7568625
    Abstract: A method of reading bar code symbols comprising the steps of: (a) projecting an image cropping zone (ICZ) framing pattern within the FOV of an image sensing array during wide-area illumination and image capturing operation; (b) visually aligning an object to be imaged within the ICZ framing pattern; (c) forming and capturing an wide-area image of the entire FOV, which spatially encompasses the ICZ framing pattern aligned about the object to be imaged; (d) using automatic software-based image cropping algorithm to automatically crop the pixels within the spatial boundaries defined by the ICZ framing pattern, from those pixels contained in the entire wide-area image frame captured during step (c); and (e) automatically decode processing the image represented by the cropped image pixels in the ICZ framing pattern so as to read a 1D or 2D bar code symbol graphically represented therein.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: August 4, 2009
    Assignee: Metpologic Instruments, Inc.
    Inventors: Xiaoxun Zhu, Yong Liu, Ka Man Au, Rui Hou, Hongpeng Yu, Xi Tao, Liang Liu, Wenhua Zhang, Anatoly Kotlarsky, Sankar Ghosh, Michael Schnee, Pasqual Spatafore, Thomas Amundsen, Sung Byun, Mark Schmidt, Garrett Russell, John Bonanno, C. Harry Knowles
  • Patent number: 7527206
    Abstract: A digital-imaging based code symbol reading system comprising an image sensing array with a field of view (FOV), an illumination subsystem with an LED illumination array, an automatic illumination measurement subsystem, an illumination control subsystem, and programmed imager processor supporting an image-processing based illumination metering program. The automatic illumination measurement subsystem automatically measures the illumination level at a particular region of the FOV and determines the illumination duration necessary to achieve a desired spatial intensity in the detected digital image. The illumination metering program automatically analyzes and measures, in real-time, the spatial intensity distribution of the digital image and determines whether or not a corrected illumination duration is required or desired when detecting the next or subsequent digital images, during the current or subsequent object illumination and imaging cycle.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: May 5, 2009
    Assignee: Metrologic Instruments, Inc.
    Inventors: Xiaoxun Zhu, Yong Liu, Ka Man Au, Rui Hou, Hongpeng Yu, Xi Tao, Liang Liu, Wenhua Zhang, Anatoly Kotlarsky
  • Patent number: 7513430
    Abstract: A portable digital image capturing and processing system comprising: an image formation and detection subsystem; a narrow-band illumination subsystem; a narrow-band transmission-type optical filter subsystem; an automatic light exposure measurement subsystem; and an automatic illumination control subsystem. The image formation and detection subsystem has an area-type image sensing array for detecting digital images of objects formed thereon by image formation optics providing a field of view (FOV) for the system. Within the FOV of the image formation and detection subsystem, the narrow-band illumination subsystem produces a field of narrow-band illumination consisting essentially of a narrow band of wavelengths of visible illumination.
    Type: Grant
    Filed: November 27, 2006
    Date of Patent: April 7, 2009
    Assignee: Metrologic Instruments, Inc.
    Inventors: Xiaoxun Zhu, Yong Liu, Ka Man Au, Rui Hou, Hongpeng Yu, Xi Tao, Liang Liu, Wenhua Zhang, Anatoly Kotlarsky, Sankar Ghosh, Michael Schnee, Pasqual Spatafore, Thomas Amundsen, Sung Byun, Mark Schmidt, Garrett Russell, John Bonanno, C. Harry Knowles
  • Patent number: 7510122
    Abstract: A portable digital image capturing and processing system comprising an image formation and detection subsystem, an LED-based illumination subsystem, an automatic light exposure measurement subsystem, and an automatic illumination control subsystem. The image formation and detection subsystem has an area-type image sensing array for detecting digital images of objects formed thereon by image formation optics providing a field of view (FOV) for the system. The automatic light exposure measurement subsystem employs a photodetector operated independently from the area-type image sensing array, for automatically measuring the light exposure incident upon a selected portion of the FOV, and producing an electrical signal representative of the light exposure measurement. The automatic illumination control subsystem responds to the electrical signal and controls the duration of LED-based illumination produced from the LED-based illumination subsystem during the image capture mode.
    Type: Grant
    Filed: November 27, 2006
    Date of Patent: March 31, 2009
    Assignee: Metrologic Instruments, Inc.
    Inventors: Xiaoxun Zhu, Yong Liu, Ka Man Au, Rui Hou, Hongpeng Yu, Xi Tao, Liang Liu, Wenhua Zhang, Anatoly Kotlarsky
  • Patent number: 7503498
    Abstract: A hand-supportable digital image capture and processing system comprises: an area-type image formation and detection subsystem having an area-type image detection array; an LED-based illumination subsystem having a LED-based illumination array; an automatic light exposure measurement and illumination control subsystem; an image capturing and buffering subsystem; and an image-processing subsystem. The LED array is automatically driven in a precise manner to globally expose the area-type image detection array with LED-based illumination only when substantially all of its rows of pixels are in a state of integration and have a common integration time, thereby enabling the capture of high quality images independent of the relative motion between the object and the hand-supportable digital image capture and processing system.
    Type: Grant
    Filed: November 21, 2006
    Date of Patent: March 17, 2009
    Assignee: Metrologic Instruments, Inc.
    Inventors: Xiaoxun Zhu, Yong Liu, Ka Man Au, Rui Hou, Hongpeng Yu, Xi Tao, Liang Liu, Wenhua Zhang, Anatoly Kotlarsky
  • Patent number: 7503499
    Abstract: A portable digital image capturing and processing system comprising: an image formation and detection subsystem; a narrow-band illumination subsystem; a narrow-band transmission-type optical filter subsystem; an automatic light exposure measurement subsystem; and an automatic illumination control subsystem. The image formation and detection subsystem has an area-type image sensing array for detecting digital images of objects formed thereon by image formation optics providing a field of view (FOV) for the system. Within the FOV of the image formation and detection subsystem, the narrow-band illumination subsystem produces a field of narrow-band illumination consisting essentially of a narrow band of wavelengths of visible illumination.
    Type: Grant
    Filed: November 27, 2006
    Date of Patent: March 17, 2009
    Assignee: Metrologic Instruments, Inc.
    Inventors: Xiaoxun Zhu, Yong Liu, Ka Man Au, Rui Hou, Hongpeng Yu, Xi Tao, Liang Liu, Wenhua Zhang, Anatoly Kotlarsky
  • Patent number: 7490778
    Abstract: A portable digital image capturing and processing system comprising: an image formation and detection subsystem; a narrow-band illumination subsystem; a narrow-band transmission-type optical filter subsystem; an automatic light exposure measurement subsystem; and an automatic illumination control subsystem. The image formation and detection subsystem has an area-type image sensing array for detecting digital images of objects formed thereon by image formation optics providing a field of view (FOV) for the system. Within the FOV of the image formation and detection subsystem, the narrow-band illumination subsystem produces a field of narrow-band illumination consisting essentially of a narrow band of wavelengths of visible illumination.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: February 17, 2009
    Assignee: Metrologic Instruments, Inc.
    Inventors: Xiaoxun Zhu, Yong Liu, Ka Man Au, Rui Hou, Hongpeng Yu, Xi Tao, Liang Liu, Wenhua Zhang, Anatoly Kotlarsky, Sankar Ghosh, Michael Schnee, Pasqual Spatafore, Thomas Amundsen, Sung Byun, Mark Schmidt, Garrett Russell, John Bonanno, C. Harry Knowles
  • Patent number: 7490774
    Abstract: A hand-supportable digital imaging-based bar code symbol reading device comprises: an IR-based object presence and range detection subsystem; a area-type image formation and detection subsystem having an image capture modes of operation; a multi-mode led-based illumination subsystem for providing a narrow-band field of illumination; an automatic light exposure measurement and illumination control subsystem; an image capturing and buffering subsystem; a image-processing bar code symbol reading subsystem; an input/output subsystem; and a system control subsystem integrated with each of the above-described subsystems.
    Type: Grant
    Filed: November 15, 2004
    Date of Patent: February 17, 2009
    Assignee: Metrologic Instruments, Inc.
    Inventors: Xiaoxun Zhu, Yong Liu, Ka Man Au, Rui Hou, Hongpeng Yu, Xi Tao, Liang Liu, Wenhua Zhang, Anatoly Kotlarsky, Sankar Ghosh, Michael Schnee, Pasqual Spatafore, Thomas Amundsen, Sung Byun, Mark Schmidt, Garrett Russell, John Bonanno, C. Harry Knowles
  • Publication number: 20090027763
    Abstract: A microelectromechanical systems (MEMS) device and related methods are described. The MEMS device comprises a first member having a first surface and a second member having a second surface, the first and second surfaces being separated by a gap that is closable by a MEMS actuation force applied to at least one of the first and second members. A standoff layer is disposed on the first surface of the first member, the standoff layer providing standoff between the first and second surfaces upon a closing of the gap by the MEMS actuation force. The standoff layer comprises a plurality of nanowires that are anchored to the first surface of the first member and that extend outward therefrom.
    Type: Application
    Filed: July 24, 2007
    Publication date: January 29, 2009
    Inventors: Wenhua Zhang, Wei Wu, Shih-Yuan Wang