Patents by Inventor Quang P. Lam

Quang P. Lam 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: 9244390
    Abstract: Techniques to determine concentration parameters of conductive liquid electrophoretic (LEP) inks are illustrated herein. In an example, a layer of conductive LEP ink is formed on a developer roller using electrostatic forces acting on the conductive LEP ink. A current is generated in response to a voltage between a measurement electrode and a developer roller. The current flows through the conductive LEP ink layer.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: January 26, 2016
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Quang P Lam, Doris Chun, Hou T. Ng
  • Patent number: 9104143
    Abstract: A liquid electrophotographic ink is disclosed. The liquid electrophotographic ink includes a carrier liquid, a polymer resin, and a pearlescent pigment particle.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: August 11, 2015
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Doris Chun, Quang P Lam, Hou T Ng
  • Patent number: 9016198
    Abstract: Printers, methods, and apparatus to filter imaging oil are disclosed. An example apparatus to filter imaging oil, includes adjacent electrodes and a switching circuit. The example switching circuit selectively generates an electrostatic field between the adjacent electrodes to cause particles suspended in the imaging oil between the adjacent electrodes to adhere to at least one of the adjacent electrodes, and generates an alternating electric field between the adjacent electrodes to cause the particles to be detached from the adjacent electrodes.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: April 28, 2015
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Quang P Lam, Michael H Lee, Omer Gila
  • Publication number: 20150071665
    Abstract: Techniques to determine concentration parameters of conductive liquid electrophoretic (LEP) inks are illustrated herein. In an example, a layer of conductive LEP ink is formed on a developer roller using electrostatic forces acting on the conductive LEP ink. A current is generated in response to a voltage between a measurement electrode and a developer roller. The current flows through the conductive LEP ink layer.
    Type: Application
    Filed: July 31, 2012
    Publication date: March 12, 2015
    Inventors: Quang P. Lam, Doris Chun, Hou T. Ng
  • Patent number: 8892005
    Abstract: Printer charging blades and printers are disclosed. An example charging blade for a printer includes an insulating layer to contact a photo imaging surface at an angle to apply pressure to the photo imaging surface, the pressure to control an amount of material present on the photo imaging surface, and a conductive layer attached to a side of the insulating layer, the conductive layer to be charged and to apply a first charge to the photo imaging surface.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: November 18, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Quang P. Lam, Michael H. Lee, Omer Gila, Thomas C. Anthony, Seongsik Chang, Paul F. Matheson
  • Publication number: 20140147783
    Abstract: A liquid electrophotographic ink is disclosed. The liquid electrophotographic ink includes a carrier liquid, a polymer resin, and a pearlescent pigment particle.
    Type: Application
    Filed: November 20, 2013
    Publication date: May 29, 2014
    Inventors: Doris Chun, Hou T. Ng, Quang P. Lam
  • Publication number: 20130288175
    Abstract: A liquid electrophotographic ink is disclosed. The liquid electrophotographic ink includes a carrier liquid, a polymer resin, and a pearlescent pigment particle.
    Type: Application
    Filed: April 25, 2012
    Publication date: October 31, 2013
    Inventors: Doris Chun, Quang P. Lam, Hou T. Ng
  • Publication number: 20130287443
    Abstract: Printer charging blades and printers are disclosed. An example charging blade for a printer includes an insulating layer to contact a photo imaging surface at an angle to apply pressure to the photo imaging surface, the pressure to control an amount of material present on the photo imaging surface, and a conductive layer attached to a side of the insulating layer, the conductive layer to be charged and to apply a first charge to the photo imaging surface.
    Type: Application
    Filed: April 30, 2012
    Publication date: October 31, 2013
    Inventors: Quang P. Lam, Michael H. Lee, Omer Gila, Thomas C. Anthony, Seongsik Chang, Paul F. Matheson
  • Publication number: 20120079955
    Abstract: Printers, methods, and apparatus to filter imaging oil are disclosed. An example apparatus to filter imaging oil, includes adjacent electrodes and a switching circuit. The example switching circuit selectively generates an electrostatic field between the adjacent electrodes to cause particles suspended in the imaging oil between the adjacent electrodes to adhere to at least one of the adjacent electrodes, and generates an alternating electric field between the adjacent electrodes to cause the particles to be detached from the adjacent electrodes.
    Type: Application
    Filed: October 5, 2010
    Publication date: April 5, 2012
    Inventors: Quang P. Lam, Michael H. Lee, Omer Gila
  • Patent number: 7907857
    Abstract: Hard imaging methods and hard imaging devices are described. According to one embodiment, a hard imaging method includes forming a plurality of latent images, using a development assembly, developing the latent images using a liquid marking agent, transporting the liquid marking agent relative to the development assembly during the developing, and performing a bubble reduction operation to reduce a presence of bubbles in the liquid marking agent during the developing and transporting compared with not performing the bubble reduction operation. Additional embodiments are described in the disclosure.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: March 15, 2011
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Michael H. Lee, Quang P. Lam, Barry J. Oldfield
  • Patent number: 7877046
    Abstract: Hard imaging devices and hard imaging methods are described. According to one embodiment, a hard imaging device includes a photoconductor, a developer member configured to move to provide a marking agent upon the photoconductor to develop a latent image upon the photoconductor, and a squeegee member configured to form a nip with the developer member and to move to provide the marking agent upon the developer member, wherein the squeegee member is configured to move at a speed slower than a speed of the developer member during the provision of the marking agent upon the developer member using a squeegee member.
    Type: Grant
    Filed: December 7, 2007
    Date of Patent: January 25, 2011
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Eric G. Nelson, Michael H. Lee, Quang P. Lam, Noa Falk
  • Publication number: 20090148190
    Abstract: Hard imaging devices and hard imaging methods are described. According to one embodiment, a hard imaging device includes a photoconductor, a developer member configured to move to provide a marking agent upon the photoconductor to develop a latent image upon the photoconductor, and a squeegee member configured to form a nip with the developer member and to move to provide the marking agent upon the developer member, wherein the squeegee member is configured to move at a speed slower than a speed of the developer member during the provision of the marking agent upon the developer member using a squeegee member.
    Type: Application
    Filed: December 7, 2007
    Publication date: June 11, 2009
    Inventors: Eric G. Nelson, Michael H. Lee, Quang P. Lam, Noa Falk
  • Publication number: 20090035003
    Abstract: Hard imaging methods and hard imaging devices are described. According to one embodiment, a hard imaging method includes forming a plurality of latent images, using a development assembly, developing the latent images using a liquid marking agent, transporting the liquid marking agent relative to the development assembly during the developing, and performing a bubble reduction operation to reduce a presence of bubbles in the liquid marking agent during the developing and transporting compared with not performing the bubble reduction operation. Additional embodiments are described in the disclosure.
    Type: Application
    Filed: July 31, 2007
    Publication date: February 5, 2009
    Inventors: Michael H. Lee, Quang P. Lam, Barry J. Oldfield