Patents by Inventor An Zhang

An 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: 20090316926
    Abstract: An audio device includes a jack, a switch, an amplifier, an internal sound producer, and a determining circuit. The jack establishes a connection with an external sound producer. The switch is in an opened state when the connection is established, and in a closed state when the connection is open. The amplifier amplifies audio signals to amplified audio signals and sends the amplified audio signals to the switch. The determining circuit receives the amplified audio signals from the switch, and generates a high voltage to control the amplifier not to output the amplified audio signals to the internal sound producer when the switch is in the closed state, and generates a low voltage to control the amplifier to output the amplified audio signals to the internal sound producer. The determined circuit further filters out the amplified audio signals when the switch is in the opened state.
    Type: Application
    Filed: June 11, 2009
    Publication date: December 24, 2009
    Applicants: HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD., HON HAI PRECISION INDSTRY CO., LTD.
    Inventors: CHUN-LUNG HUNG, KUN HUANG, SHAO-LIN ZHANG, DE-AN ZHANG
  • Patent number: 7580239
    Abstract: A charge storage cell is made up of two electrodes spaced apart by a dielectric layer incorporating a molecular switch. A method of operating a bi-stable, molecular switch charge storage cell encompassing two electrodes spaced apart by a dielectric layer incorporating a molecular switch having an electric dipole is also disclosed. The method involves applying a voltage across said dielectric layer to induce opposing charges on said electrodes that create an electric field across said dielectric layer, wherein molecular dipoles within said dielectric layer align or change in response to said electric field, creating an opposing electric field and a change in state of said molecular switch from a first state to a second state; and applying a voltage of reverse polarity across said dielectric aver to change said state of said molecular switch from said second state to said first state.
    Type: Grant
    Filed: June 29, 2006
    Date of Patent: August 25, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Kent D. Vincent, Xiao-An Zhang
  • Publication number: 20090167433
    Abstract: An audio apparatus includes an input, a first resistor, a first capacitor, an amplifier, a second resistor, a second capacitor, and an output. The input is used for inputting audio signals. The first resistor and the amplifier are serially connected to the input; wherein the first resistor is connected to the inverting input of the amplifier and the non-inverting input of the amplifier is connected to ground. The first capacitor has one end connected to a node between the first resistor and the inverting input of the amplifier, the other end connected to ground. The second resistor has one end connected to a node between the first resistor and the inverting input of the amplifier, the other end connected to the output of the amplifier. The second capacitor is connected between the inverting input and the output of the amplifier. The output is connected to the output of the amplifier, for outputting the audio signals after processing.
    Type: Application
    Filed: July 27, 2008
    Publication date: July 2, 2009
    Applicants: HONG FU JIN PRECISION INDUSTRY (SHENZHEN) CO., LTD., HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: CHUN-LUNG HUNG, DE-AN ZHANG, WEN-MING CHEN, KUN HUANG, JIE LIU, SHAO-LIN ZHANG
  • Patent number: 7554713
    Abstract: An electrochemically-activated optical switch is provided, comprising a molecular system configured between a pair of electrodes. The molecular system includes a moiety that is oxidizable or reducible in the presence of an electric current.
    Type: Grant
    Filed: October 30, 2003
    Date of Patent: June 30, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Xiao-An Zhang, R. Stanley Williams
  • Publication number: 20090115511
    Abstract: An audio amplifier is provided. The audio amplifier includes an amplifier, a biasing circuit, and a time-delay circuit. The amplifier circuit is for amplifying audio signals. The biasing circuit is for providing a bias voltage to the amplifier circuit to actuate the amplifier circuit. The time-delay circuit is for receiving a pulse signal and delaying the bias voltage to avoid a sudden actuation of the amplifier circuit.
    Type: Application
    Filed: August 7, 2008
    Publication date: May 7, 2009
    Applicants: HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD, HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: CHUN-LUNG HUNG, WEN-MING CHEN, JIE LIU, DE-AN ZHANG, WANG-CHANG DUAN, TAO WANG
  • Patent number: 7496216
    Abstract: A system and method of capturing a skin print from skin having ridges and valleys. A skin print sensor having a return/supply contact and a plurality of contact pads is provided. A finger is applied to the skin print sensor and data is stored representative of contact pads in contact with skin ridges.
    Type: Grant
    Filed: June 21, 2005
    Date of Patent: February 24, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Sui-hing Leung, Sean Xiao-An Zhang, Chung Ching Yang
  • Publication number: 20080266647
    Abstract: A colorant molecule is provided that includes at least one switch unit. The switch unit comprises ring-based tautomers, of which there may be more than one per chromophore, and may include donor and/or acceptor moieties.
    Type: Application
    Filed: April 26, 2007
    Publication date: October 30, 2008
    Inventors: Kent D. Vincent, Xian-An Zhang, Zhou-Lin Zhou
  • Patent number: 7404981
    Abstract: A method is provided for printing electronic and opto-electronic circuits. The method comprises: (a) providing a substrate; (b) providing a film-forming precursor species; (c) forming a substantially uniform and continuous film of the film-forming precursor species on at least one side of the substrate, the film having a first electrical conductivity; and (d) altering portions of the film with at least one conductivity-altering species to form regions having a second electrical conductivity that is different than the first electrical conductivity, the regions thereby providing circuit elements. The method employs very simple and continuous processes, which make the time to produce a batch of circuits very short and leads to very inexpensive products, such as electronic memories (write once or rewriteable), electronically addressable displays, and generally any circuit for which organic electronics or opto-electronics are acceptable.
    Type: Grant
    Filed: April 21, 2003
    Date of Patent: July 29, 2008
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Xiao-An Zhang, R. Stanley Williams, Yong Chen
  • Publication number: 20080138292
    Abstract: The present invention generally relates to agents and compositions having MRI and/or optical signals, and methods for their use in the determination of an analyte. In some cases, an optical, MRI, or other signal produced by the agent or composition may be affected by the presence of an analyte. Some embodiments of the present invention may provide agents or compositions which are cell permeable. Examples of analytes that may be determined by the present invention include zinc ions, calcium ions, and other biological analytes.
    Type: Application
    Filed: September 14, 2007
    Publication date: June 12, 2008
    Applicant: Massachusetts Institute of Technology
    Inventors: Xiao-An Zhang, Alan Pradip Jasanoff, Stephen J. Lippard
  • Publication number: 20080100564
    Abstract: An electronically addressable display comprises a substrate, at least one polarization-type, electrical field switchable molecular colorant associated with the substrate, and an addressing device mounted for selectively switching the at least one molecular colorant between at least two visually distinguishable states. Electronic devices including the electronically addressable displays and methods of manufacturing the electronically addressable display are also disclosed.
    Type: Application
    Filed: October 26, 2006
    Publication date: May 1, 2008
    Inventors: Kent D. Vincent, Sean Xiao-An Zhang, Zhang-Lin Zhou
  • Patent number: 7345302
    Abstract: The invention described herein includes a molecular switch, comprising: a donor subunit; an acceptor subunit; and an aromatic bridging subunit comprising one or more bridging groups for bonding the donor subunit to the aromatic bridging subunit and for bonding the acceptor subunit to the aromatic bridging subunit wherein the aromatic bridging subunit is conformable in a manner effective for polarizing and de-polarizing the molecular switch at a low electric field voltage.
    Type: Grant
    Filed: September 21, 2004
    Date of Patent: March 18, 2008
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Sean Xiao-An Zhang, Kent Vincent, Zhang-Lin Zhou, R. Stanley Williams
  • Publication number: 20080022927
    Abstract: A microfluidic device for controllably moving a material of interest includes a holding cavity configured to hold the material of interest and at least one actuator configured to induce an activation material to expand or contract. Expansion of the activation material decreases the size of the holding cavity to cause the material of interest to be released from the holding cavity and contraction of the activation material increases the size of the holding cavity to cause the material of interest to be received into the holding cavity. The at least one actuator is operable at multiple levels between a zero induction level to a maximum induction level on the activation material to thereby controllably expand or contract the holding cavity to release or receive a specified volume of the material of interest.
    Type: Application
    Filed: July 28, 2006
    Publication date: January 31, 2008
    Inventors: Sean Xiao-An Zhang, Patricia A. Beck, Janice H. Nickel
  • Publication number: 20080002333
    Abstract: A charge storage cell comprises two electrodes spaced apart by a dielectric layer incorporating a molecular switch.
    Type: Application
    Filed: June 29, 2006
    Publication date: January 3, 2008
    Inventors: Kent D. Vincent, Xiao-An Zhang
  • Patent number: 7294526
    Abstract: An optical sensor is provided, comprising (a) a silicon nanowire of finite length having an electrical contact pad at each end thereof; and (b) a plurality of self-assembled molecules on a surface of the silicon nanowire, the molecules serving to modulate electrical conductivity of the silicon nanowire by either a reversible change in dipole moment of the molecules or by a reversible molecule-assisted electron/energy transfer from the molecules onto the silicon nanowire. Further, a method of making the optical sensor is provided. The concept of molecular self-assembly is applied in attaching functional molecules onto silicon nanowire surfaces, and the requirement of molecule modification (hydroxy group in molecules) is minimal from the point view of synthetic difficulty and compatibility. Self-assembly will produce well-ordered ultra-thin films with strong chemical bonding on a surface that cannot be easily achieved by other conventional methods.
    Type: Grant
    Filed: August 12, 2004
    Date of Patent: November 13, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Zhiyong Li, Yong Chen, Sean Xiao-An Zhang
  • Publication number: 20070258952
    Abstract: The present invention includes compositions and methods for the knockdown of one or more genes to a target cell in need of gene therapy by using an siRNA transgene that is integrated into a replication-competent, oncolytic adenovirus.
    Type: Application
    Filed: May 4, 2007
    Publication date: November 8, 2007
    Applicants: BAYLOR RESEARCH INSTITUTE, MUREX PHARMACEUTICALS, BAYLOR UNIVERSITY
    Inventors: Alex W. Tong, Yu An Zhang, John J. Nemunaitis, Yuqiao Shen, Po-hsun Chen, Shirley K. Samuel
  • Patent number: 7291514
    Abstract: Langmuir-Blodgett films are provided in which a molecule is chemically bonded with a bottom electrode substrate as part of a crossed wire device comprising two electrodes and a molecular layer therebetween. The molecule, which comprises a switchable moiety and a connecting moiety, is provided with a photolabile capping group attached to the connecting moiety. The photolabile capping group temporarily caps the reactive connecting group of the molecule. The capped molecules are processed to form a LB film on the water-air interface of water. The films are then exposed to UV light. The photolabile capping group decomposes to give back the connecting group, which remains in the water. As the uncapped LB films are transferred to a bottom electrode substrate, the surface of the electrode reacts with the reactive connecting group of the molecule to form a chemically bonded LB layer on the substrate, thereby providing improved LB films.
    Type: Grant
    Filed: March 2, 2004
    Date of Patent: November 6, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Zhang-Lin Zhou, Yong Chen, Xiao-An Zhang
  • Patent number: 7193605
    Abstract: Method and apparatus for document content publishing, distribution, and display, including a method of doing business. An electronic display includes at least one reusable imaging stratum forming a pixel array of a bi-modal molecular colorant. Preferably, the molecules have bistable orientations. The imaging stratum having a viewing surface and a back surface. Adjacent said back surface is a background stratum. An addressing device is mounted for selectively switching colorant molecules of the imaging stratum between a transparent orientation and a color-exhibiting orientation. The present invention is adaptable to reflective light, back lit, and projection implementations.
    Type: Grant
    Filed: October 30, 2003
    Date of Patent: March 20, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Kent D. Vincent, R. Stanley Williams, Xiao-An Zhang
  • Patent number: 7175961
    Abstract: Bistable molecules are provided with at least one photosensitive functional group. As thus constituted, the bistable molecules are photopatternable, thereby allowing fabrication of micrometer-scale and nanometer-scale circuits in discrete areas without relying on a top conductor as a mask. The bistable molecules may comprise molecules that undergo redox reactions, such as rotaxanes and catenanes, or may comprise molecules that undergo an electric-field-induced band gap change that causes the molecules, or a portion thereof, to rotate, bend, twist, or otherwise change from a substantially fully conjugated state to a less conjugated state. The change in states in the latter case results in a change in electrical conductivity.
    Type: Grant
    Filed: October 24, 2001
    Date of Patent: February 13, 2007
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Patricia A. Beck, Xiao-An Zhang, Zhang-Lin Zhou
  • Patent number: 7144683
    Abstract: Bistable molecules are provided with at least one photosensitive functional group. As thus constituted, the bistable molecules are photopatternable, thereby allowing fabrication of micrometer-scale and nanometer-scale circuits in discrete areas without relying on a top conductor as a mask. The bistable molecules may comprise molecules that undergo redox reactions, such as rotaxanes and catenanes, or may comprise molecules that undergo an electric-field-induced band gap change that causes the molecules, or a portion thereof, to rotate, bend, twist, or otherwise change from a substantially fully conjugated state to a less conjugated state. The change in states in the latter case results in a change in electrical conductivity.
    Type: Grant
    Filed: October 30, 2003
    Date of Patent: December 5, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Patricia A. Beck, Xiao-An Zhang, Zhang-Lin Zhou
  • Patent number: 7113165
    Abstract: A molecular light valve controlled color display. The display is formed through a layer of such molecules between a crossbar array of transparent electrodes, the crossbar intersections forming addressable pixels. A rapid sequencing of primary colors is controlled by molecular light valves congruent with display pixels. Native display resolution for a full gamut of colors is maintained for each pixel via a temporally distributed color pixel scheme. Both still and motion images can be displayed. Molecular valves, or switches, transition between two optically distinct states, e.g., transparent and black.
    Type: Grant
    Filed: October 25, 2002
    Date of Patent: September 26, 2006
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Kent D. Vincent, Xiao-An Zhang, R. Stanley Williams