Patents by Inventor Zoran D. Popovic

Zoran D. Popovic 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).

  • Display device with anthracene and triazine derivatives
    Publication number: 20040018380
    Abstract: A device includes:
    Type: Application
    Filed: July 26, 2002
    Publication date: January 29, 2004
    Applicant: Xerox Corporation
    Inventors: Hany Aziz, Nan-Xing Hu, Zoran D. Popovic, Ah-Mee Hor
  • Display device with anthracene and triazine derivatives
    Publication number: 20040018383
    Abstract: A device includes:
    Type: Application
    Filed: February 24, 2003
    Publication date: January 29, 2004
    Applicant: Xerox Corporation
    Inventors: Hany Aziz, Nan-Xing Hu, Zoran D. Popovic, Ah-Mee Hor
  • Electroluminescent devices
    Patent number: 6670054
    Abstract: An electroluminescent device including a first electrode, a second electrode, and situated between the electrodes a carbazole layer of the formula wherein R1, R2, R3, and R4 are independently selected from the group consisting of a hydrocarbyl, and wherein Ar is an aryl.
    Type: Grant
    Filed: July 25, 2002
    Date of Patent: December 30, 2003
    Assignee: Xerox Corporation
    Inventors: Nan-Xing Hu, Hany Aziz, Zoran D. Popovic, Ah-Mee Hor
  • Devices with multiple organic-metal mixed layers
    Publication number: 20030234609
    Abstract: A display device composed of:
    Type: Application
    Filed: March 26, 2003
    Publication date: December 25, 2003
    Applicant: Xerox Corporation
    Inventors: Hany Aziz, Ryan Norris, Zoran D. Popovic, Anthony J. Paine, Jennifer A. Coggan, Nan-Xing Hu
  • Photoconductive members
    Publication number: 20030215727
    Abstract: A photoconductive imaging member comprised of a supporting substrate, a photogenerating layer and a charge transport layer, and wherein said charge transport layer contains a component that substantially prevents light of a wavelength of about equal to or about less than 700 nanometers from interaction with said photogenerating layer.
    Type: Application
    Filed: May 17, 2002
    Publication date: November 20, 2003
    Applicant: Xerox Corporation
    Inventors: John F. Graham, Zoran D. Popovic, Ah-Mee Hor, James M. Duff, Satchidanand Mishra
  • Organic electroluminescent (EL) devices
    Publication number: 20030170490
    Abstract: A new class of conjugated organic polymers or copolymers comprising a triazine group. This class of polymers or copolymers may be used in organic electroluminescent (EL) devices.
    Type: Application
    Filed: January 29, 2002
    Publication date: September 11, 2003
    Applicant: Xerox Corporation
    Inventors: Nan-Xing Hu, Zoran D. Popovic, Guerino G. Sacripante
  • Organic light emitting devices
    Patent number: 6614175
    Abstract: An organic light emitting device which contains a mixed region of a hole transport, an electron transport, and an organic luminescent component. The mixed region can be situated between two electrodes, one of which includes a thermal protective layer. Further, the device contains a hole transport region situated between the mixed region and an anode electrode, and an electron transport layer situated between the mixed region and a cathode electrode.
    Type: Grant
    Filed: January 26, 2001
    Date of Patent: September 2, 2003
    Assignee: Xerox Corporation
    Inventors: Hany Aziz, Zoran D. Popovic, Nan-Xing Hu
  • Liquid charging method and apparatus
    Patent number: 6600888
    Abstract: A method including: (a) dispensing an electrically conductive liquid into a contact member permeable to the liquid; (b) rubbing the contact member and a surface against each other, at a contact length greater than a tangential contact length, to release the liquid from the contact member to wet the surface with the electrically conductive liquid in a layer ranging in thickness from about 1 to about 100 micrometers; and (c) electrifying the liquid at any time effective for imparting an electrical charge to the surface.
    Type: Grant
    Filed: November 2, 2001
    Date of Patent: July 29, 2003
    Assignee: Xerox Corporation
    Inventors: Satchidanand Mishra, Zoran D. Popovic, Anthony M. Horgan, Robert C. U. Yu, Geoffrey M. T. Foley, Huoy-Jen Yuh, Eugene A. Swain
  • Organic devices
    Publication number: 20030134146
    Abstract: An electroluminescent device containing a number of layers with a mixed region of a hole transport compound, and an electron transport compound, and hole and electron transport regions.
    Type: Application
    Filed: November 8, 2001
    Publication date: July 17, 2003
    Applicant: Xerox Corporation
    Inventors: Hany Aziz, Nan-Xing Hu, Ah-Mee Hor, Zoran D. Popovic
  • Annealed organic light emitting devices and methods of annealing organic light emitting devices
    Publication number: 20030132704
    Abstract: Organic light emitting devices includes a light emission region between a cathode and anode. The light emission region comprises an organic light emitting material. The organic light emitting devices are formed by annealing as-fabricated devices. The annealing improves the performance of the as-fabricated devices, by decreasing their operating voltage and increasing their energy conversion efficiency. Multiple organic light emitting devices can be annealed to make the properties of the devices more uniform relative to each other.
    Type: Application
    Filed: January 16, 2003
    Publication date: July 17, 2003
    Applicant: Xerox Corporation
    Inventors: Hany M. Aziz, Zoran D. Popovic, Nan-Xing Hu
  • Organic light emitting devices
    Publication number: 20030104244
    Abstract: An organic light emitting device containing
    Type: Application
    Filed: November 8, 2001
    Publication date: June 5, 2003
    Applicant: Xerox Corporation
    Inventors: Hany Aziz, Cuong Vong, Nan-Xing Hu, Zoran D. Popovic, Ah-Mee Hor
  • Red organic light emitting devices
    Publication number: 20030104242
    Abstract: An organic light emitting, or EL device containing a number of layers, and containing red emitting compounds or components.
    Type: Application
    Filed: November 8, 2001
    Publication date: June 5, 2003
    Applicant: Xerox Corporation
    Inventors: Hany Aziz, Nan-Xing Hu, Zoran D. Popovic, Ah-Mee Hor
  • Green organic light emitting devices
    Publication number: 20030104243
    Abstract: A device containing a number of layers with one of the layers containing a green emitting component.
    Type: Application
    Filed: November 8, 2001
    Publication date: June 5, 2003
    Applicant: Xerox Corporation
    Inventors: Hany Aziz, Cuong Vong, Nan-Xing Hu, Zoran D. Popovic, Ah-Mee Hor
  • Electroluminescent (EL) devices
    Patent number: 6562485
    Abstract: An electroluminescent device containing an anode, an organic electroluminescent element, and a cathode wherein the electroluminescent element contains, for example, a fluorescent hydrocarbon component of Formula (I) wherein R1 and R2 are substituents, which are selected from the group consisting of hydrogen, an alkyl, an alicyclic alkyl, an alkoxy, a halogen, and a cyano; Ar1 and Ar2 are each independently an aromatic component or an aryl group comprised of a from about 4 to about 15 conjugate-bonded or fused benzene rings.
    Type: Grant
    Filed: August 29, 2002
    Date of Patent: May 13, 2003
    Assignee: Xerox Corporation
    Inventors: Nan-Xing Hu, Hany Aziz, Poonam Jain, Zoran D. Popovic
  • Carbazole compounds
    Patent number: 6562982
    Abstract: A carbazole wherein R1, R2, R3, and R4 are independently a hydrocarbyl, and wherein Ar is an aryl.
    Type: Grant
    Filed: July 25, 2002
    Date of Patent: May 13, 2003
    Assignee: Xerox Corporation
    Inventors: Nan-Xing Hu, Hany Aziz, Zoran D. Popovic, Ah-Mee Hor
  • Organic light emitting devices
    Publication number: 20030087125
    Abstract: An electroluminescence (EL) device containing a number of layers, including two electrodes and positioned between the electrodes a mixed region, a hole transport region, and an electron transport region, wherein the mixed region contains, for example, biphenyl TPD, an electron transport compound and a luminescent compound.
    Type: Application
    Filed: November 8, 2001
    Publication date: May 8, 2003
    Applicant: Xerox Corporation
    Inventors: Hany Aziz, Nan-Xing Hu, Cuong Vong, Ah-Mee Hor, Zoran D. Popovic
  • Liquid charging method and apparatus
    Publication number: 20030086724
    Abstract: A method including: (a) dispensing an electrically conductive liquid into a contact member permeable to the liquid; (b) rubbing the contact member and a surface against each other, at a contact length greater than a tangential contact length, to release the liquid from the contact member to wet the surface with the electrically conductive liquid in a layer ranging in thickness from about 1 to about 100 micrometers; and (c) electrifying the liquid at any time effective for imparting an electrical charge to the surface.
    Type: Application
    Filed: November 2, 2001
    Publication date: May 8, 2003
    Applicant: Xerox Corporation
    Inventors: Satchidanand Mishra, Zoran D. Popovic, Anthony M. Horgan, Robert C.U. Yu, Geoffrey M.T. Foley, Huoy-Jen Yuh, Eugene A. Swain
  • Color balance control in organic light emitting diode displays
    Publication number: 20030053044
    Abstract: A system and method are provided for measuring the average light levels from a flat panel display for use in a brightness compensating system. One or more photodiodes are disposed outside of the display area of a flat panel display so as to measure the average light levels directly or via total internal reflection through the transparent substrate of the display. The measured light levels are then used to provide a baseline for calibrating the color balance and brightness of the display using the brightness compensating system.
    Type: Application
    Filed: September 18, 2001
    Publication date: March 20, 2003
    Applicant: Xerox Corporation
    Inventors: Zoran D. Popovic, John F. Graham, Hany Aziz, Nan-Xing Hu
  • Electroluminescent (EL) devices
    Publication number: 20030044646
    Abstract: An electroluminescent device containing an anode, an organic electroluminescent element, and a cathode wherein the electroluminescent element contains, for example, a fluorescent hydrocarbon component of Formula (I) 1
    Type: Application
    Filed: August 29, 2002
    Publication date: March 6, 2003
    Applicant: Xerox Corporation
    Inventors: Nan-Xing Hu, Hany Aziz, Poonam Jain, Zoran D. Popovic
  • OLEDs Having light absorbing electrode
    Publication number: 20030038593
    Abstract: An organic light emitting device composed of: a first electrode; a second electrode; and a luminescent region including an organic electroluminescent material between the first electrode and the second electrode, wherein one of the first electrode and the second electrode includes both a substantially transparent charge injecting layer adjacent to the luminescent region and an electrically conductive light absorbing layer.
    Type: Application
    Filed: August 22, 2001
    Publication date: February 27, 2003
    Applicant: Xerox Corporation
    Inventors: Hany Aziz, Nan-Xing Hu, Zoran D. Popovic, James M. Duff