Patents by Inventor David H. Pan

David H. Pan 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: 10133204
    Abstract: An electrophotographic imaging device includes a charging device, a cleaning device, and a fuser member that each include hydrophobic carbon nanotubes. The use of hydrophobic carbon nanotubes can increases the charging device's, the cleaning device's, and the fuser member's durability, conductivity, and contaminants deposition.
    Type: Grant
    Filed: August 22, 2016
    Date of Patent: November 20, 2018
    Assignee: XEROX CORPORATION
    Inventors: Liang-Bih Lin, David H. Pan, Daniel Levy, Jin Wu
  • Publication number: 20160357124
    Abstract: An electrophotographic imaging device includes a charging device, a cleaning device, and a fuser member that each include hydrophobic carbon nanotubes. The use of hydrophobic carbon nanotubes can increases the charging device's, the cleaning device's, and the fuser member's durability, conductivity, and contaminants deposition.
    Type: Application
    Filed: August 22, 2016
    Publication date: December 8, 2016
    Inventors: Liang-Bih Lin, David H. Pan, Daniel Levy, Jin Wu
  • Patent number: 9494888
    Abstract: An electrophotographic imaging device includes a charging device, a cleaning device, and a fuser member that each include hydrophobic carbon nanotubes. The use of hydrophobic carbon nanotubes can increases the charging device's, the cleaning device's, and the fuser member's durability, conductivity, and contaminants deposition.
    Type: Grant
    Filed: September 8, 2014
    Date of Patent: November 15, 2016
    Assignee: XEROX CORPORATION
    Inventors: Liang-Bih Lin, David H Pan, Daniel Levy, Jin Wu
  • Publication number: 20140376964
    Abstract: An electrophotographic imaging device includes a charging device, a cleaning device, and a fuser member that each include hydrophobic carbon nanotubes. The use of hydrophobic carbon nanotubes can increases the charging device's, the cleaning device's, and the fuser member's durability, conductivity, and contaminants deposition.
    Type: Application
    Filed: September 8, 2014
    Publication date: December 25, 2014
    Inventors: Liang-Bih Lin, David H Pan, Daniel Levy, Jin Wu
  • Patent number: 8840998
    Abstract: An electrophotographic imaging device includes a charging device, a cleaning device, and a fuser member that each include hydrophobic carbon nanotubes. The use of hydrophobic carbon nanotubes can increases the charging device's, the cleaning device's, and the fuser member's durability, conductivity, and contaminants deposition.
    Type: Grant
    Filed: November 14, 2007
    Date of Patent: September 23, 2014
    Assignee: Xerox Corporation
    Inventors: Liang-Bih Lin, David H. Pan, Daniel Levy, Jin Wu
  • Patent number: 8377316
    Abstract: This is structure and method for providing a textured surfaced that can be used in a plurality of systems including ink jet printing. In ink jet printing, the textured surface of this invention controls ink drawback and significantly improves image quality. The textured surface has an average roughness, Ra, of about 0.2 to 1.5 microns, a texture density of about 104-107 pits per cm2, a texture size of about 0.5-5 microns, and a texture depth of about 0.5-10 microns.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: February 19, 2013
    Assignee: Xerox Corporation
    Inventors: David H. Pan, T. Edwin Freeman
  • Patent number: 8278815
    Abstract: In accordance with the invention, there are field emission light emitting devices and methods of making them. The field emission light emitting device can include a plurality of spacers, each connecting a substantially transparent substrate to a backing substrate. The device can also include a plurality of pixels, wherein each of the plurality of pixels can include one or snore first electrodes disposed over the substantially transparent substrate, a light emitting layer disposed over each of the one or more first electrodes, and one or more second electrodes disposed over the backing substrate, wherein the one or more second electrodes and the one or more first electrode are disposed at a predetermined gap in a low pressure region. Each of the plurality of pixels can further include one or more nanocylinder electron emitter arrays disposed over each of the one or more second electrodes.
    Type: Grant
    Filed: July 22, 2011
    Date of Patent: October 2, 2012
    Assignee: Xerox Corporation
    Inventors: David H. Pan, Fa-Gung Fan
  • Patent number: 8120889
    Abstract: Exemplary embodiments provide charging systems and methods for effectively delivering charges onto a receptor. The charging system can include a low velocity gas stream, an emitter assembly for providing cathode-to-anode field bias to generate charges from the low velocity gas stream, and an emitter-to-receptor (e.g., photoreceptor) electric bias to enhance the charge delivery to the receptor. The disclosed charging systems and methods can be used to achieve an optimal charging performance at a low projected cost for any suitable receptor that needs to be charged. Exemplary receptors can include a photoreceptor (PR) such as a belt PR or a drum PR, a toner layer, a sheet of media on which toner can be deposited, or a transfer belt in an electrophotographic printing machine.
    Type: Grant
    Filed: June 4, 2008
    Date of Patent: February 21, 2012
    Assignee: Xerox Corporation
    Inventors: Fa-Gung Fan, Joseph A. Swift, Michael F. Zona, David H. Pan
  • Publication number: 20110298203
    Abstract: Disclosed are anti-counterfeiting methods which use a fiduciary marker encoded with the location of a hidden security feature. Documents produced by the methods, and methods for verifying authenticity of documents produced by the methods, are also disclosed.
    Type: Application
    Filed: June 2, 2010
    Publication date: December 8, 2011
    Applicant: XEROX CORPORATION
    Inventors: David H. Pan, Pinyen Lin, Zhigang Fan
  • Publication number: 20110279013
    Abstract: In accordance with the invention, there are field emission light emitting devices and methods of making them. The field emission light emitting device can include a plurality of spacers, each connecting a substantially transparent substrate to a backing substrate. The device can also include a plurality of pixels, wherein each of the plurality of pixels can include one or snore first electrodes disposed over the substantially transparent substrate, a light emitting layer disposed over each of the one or more first electrodes, and one or more second electrodes disposed over the backing substrate, wherein the one or more second electrodes and the one or more first electrode are disposed at a predetermined gap in a low pressure region. Each of the plurality of pixels can further include one or more nanocylinder electron emitter arrays disposed over each of the one or more second electrodes.
    Type: Application
    Filed: July 22, 2011
    Publication date: November 17, 2011
    Applicant: XEROX CORPORATION
    Inventors: David H. Pan, Fa-Gung Fan
  • Patent number: 8007333
    Abstract: In accordance with the invention, there are field emission light emitting devices and methods of making them. The field emission light emitting device can include a plurality of spacers, each connecting a substantially transparent substrate to a backing substrate. The device can also include a plurality of pixels, wherein each of the plurality of pixels can include one or more first electrodes disposed over the substantially transparent substrate, a light emitting layer disposed over each of the one or more first electrodes, and one or more second electrodes disposed over the backing substrate, wherein the one or more second electrodes and the one or more first electrode are disposed at a predetermined gap in a low pressure region. Each of the plurality of pixels can further include one or more nanocylinder electron emitter arrays disposed over each of the one or more second electrodes.
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: August 30, 2011
    Assignee: Xerox Corporation
    Inventors: David H. Pan, Fa-Gung Fan
  • Patent number: 7995952
    Abstract: In accordance with the invention, there are electron emitters, charging devices, and methods of forming them. An electron emitter array can include a plurality of nanostructures, each of the plurality of nanostructures can include a first end and a second end, wherein the first end can be connected to a first electrode and the second end can be positioned to emit electrons, and wherein each of the plurality of nanostructures can be formed of one or more of oxidation resistant metals, doped metals, metal alloys, metal oxides, doped metal oxides, and ceramics. The electron emitter array can also include a second electrode in close proximity to the first electrode, wherein one or more of the plurality of nanostructures can emit electrons in a gas upon application of an electric field between the first electrode and the second electrode.
    Type: Grant
    Filed: March 5, 2008
    Date of Patent: August 9, 2011
    Assignee: Xerox Corporation
    Inventors: David H. Pan, Fa-Gung Fan, Joseph A. Swift, Dan A. Hays, Michael F. Zona
  • Patent number: 7990068
    Abstract: In accordance with the invention, there are nanoscale electron emitters, field emission light emitting devices, and methods of forming them. The nanoscale electron emitter can include a first electrode electrically connected to a first power supply and a second electrode electrically connected to a second power supply. The nanoscale electron emitter can also include a nanocylinder electron emitter array disposed over the second electrode, the nanocylinder electron emitter array having a plurality of nanocylinder electron emitters disposed in a dielectric matrix, wherein each of the plurality of nanocylinder electron emitters can include a first end connected to the second electrode and a second end positioned to emit electrons, the first end being opposite to the second end.
    Type: Grant
    Filed: March 4, 2008
    Date of Patent: August 2, 2011
    Assignee: Xerox Corporation
    Inventor: David H. Pan
  • Patent number: 7875307
    Abstract: Methods form a multi-color electrophoretic display. The methods include providing microcapsules, wherein the microcapsules have an electrostatic charge, and wherein the microcapsules comprise, a shell that is transparent and a display medium within the shell, wherein the display medium is comprised of either (a) at least two sets of differently colored particles in a substantially clear fluid, or (b) at least one set of colored particles in a differently colored fluid. The methods include transferring the microcapsules to a substrate, wherein the electrostatic charge of the microcapsules attracts the microcapsules to the substrate, wherein a display layer of microcapsules is formed on the substrate. The methods include positioning a conductive substrate adjacent to the substrate, wherein the substrate is located between the display layer and the conductive substrate.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: January 25, 2011
    Assignee: Xerox Corporation
    Inventors: Pinyen Lin, David H. Pan, Naveen Chopra, Peter M. Kazmaier
  • Patent number: 7862866
    Abstract: Methods form multi-color electrophoretic displays. The method includes providing a solution containing microcapsules, wherein the microcapsules comprise a shell that is transparent and a display medium within the shell, wherein the display medium comprised of either (a) at least two sets of differently colored particles in a substantially clear fluid, or (b) at least one set of colored particles in a differently colored fluid. The method includes dispensing the solution onto a substrate, wherein a display layer of microcapsules is formed on the substrate. The method includes positioning a conductive substrate adjacent to the substrate, wherein the substrate is located between the display layer and the conductive substrate, wherein the conductive substrate applies an electric field to at least one microcapsule of the display layer, wherein the sets of particles of each microcapsule in the display layer are movable within the microcapsule by the electric field to be displayed.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: January 4, 2011
    Assignee: Xerox Corporation
    Inventors: Pinyen Lin, David H. Pan, Naveen Chopra, Peter M. Kazmaier
  • Publication number: 20100279078
    Abstract: This is structure and method for providing a textured surfaced that can be used in a plurality of systems including ink jet printing. In ink jet printing, the textured surface of this invention controls ink drawback and significantly improves image quality. The textured surface has an average roughness, Ra, of about 0.2 to 1.5 microns, a texture density of about 104-107 pits per cm2, a texture size of about 0.5-5 microns, and a texture depth of about 0.5-10 microns.
    Type: Application
    Filed: April 30, 2009
    Publication date: November 4, 2010
    Applicant: XEROX CORPORATION
    Inventors: David H. PAN, T. Edwin FREEMAN
  • Patent number: 7715733
    Abstract: Systems and methods for authentication of materials used in imaging members and assemblies. Authentication of imaging materials ensure that compatible components are being used with the imaging members and assemblies. Embodiments provide a system and method for efficiently detecting whether materials being used in the imaging members and assemblies are compatible and authentic materials authorized for such uses.
    Type: Grant
    Filed: March 21, 2007
    Date of Patent: May 11, 2010
    Assignee: Xerox Corporation
    Inventors: David H. Pan, Santokh S. Badesha, Randall R. Hube
  • Patent number: 7706700
    Abstract: Systems and methods for authentication of materials used in imaging members and assemblies. Authentication of imaging materials ensure that compatible components are being used with the imaging members and assemblies. Embodiments provide a system and method for efficiently detecting whether materials being used in the imaging members and assemblies are compatible and authentic materials authorized for such uses.
    Type: Grant
    Filed: March 21, 2007
    Date of Patent: April 27, 2010
    Assignee: Xerox Corporation
    Inventors: David H. Pan, Santokh S. Badesha, Randall R. Hube
  • Publication number: 20090303654
    Abstract: Exemplary embodiments provide charging systems and methods for effectively delivering charges onto a receptor. The charging system can include a low velocity gas stream, an emitter assembly for providing cathode-to-anode field bias to generate charges from the low velocity gas stream, and an emitter-to-receptor (e.g., photoreceptor) electric bias to enhance the charge delivery to the receptor. The disclosed charging systems and methods can be used to achieve an optimal charging performance at a low projected cost for any suitable receptor that needs to be charged. Exemplary receptors can include a photoreceptor (PR) such as a belt PR or a drum PR, a toner layer, a sheet of media on which toner can be deposited, or a transfer belt in an electrophotographic printing machine.
    Type: Application
    Filed: June 4, 2008
    Publication date: December 10, 2009
    Applicant: XEROX CORPORATION
    Inventors: Fa-Gung FAN, Joseph A. Swift, Michael F. Zona, David H. Pan
  • Publication number: 20090302738
    Abstract: In accordance with the invention, there are field emission light emitting devices and methods of making them. The field emission light emitting device can include a plurality of spacers, each connecting a substantially transparent substrate to a backing substrate. The device can also include a plurality of pixels, wherein each of the plurality of pixels can include one or more first electrodes disposed over the substantially transparent substrate, a light emitting layer disposed over each of the one or more first electrodes, and one or more second electrodes disposed over the backing substrate, wherein the one or more second electrodes and the one or more first electrode are disposed at a predetermined gap in a low pressure region. Each of the plurality of pixels can further include one or more nanocylinder electron emitter arrays disposed over each of the one or more second electrodes.
    Type: Application
    Filed: June 6, 2008
    Publication date: December 10, 2009
    Inventors: David H. Pan, Fa-Gung Fan