Patents by Inventor Xiangfei Qi

Xiangfei Qi 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).

  • Stacked white OLED having separate red, green and blue sub-elements
    Patent number: 10014485
    Abstract: The present invention relates to efficient organic light emitting devices (OLEDs). More specifically, the present invention relates to white-emitting OLEDs, or WOLEDs. The devices of the present invention employ three emissive sub-elements, typically emitting red, green and blue, to sufficiently cover the visible spectrum. The sub-elements are separated by charge generating layers.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: July 3, 2018
    Assignee: The Regents of the University of Michigan
    Inventors: Stephen Forrest, Xiangfei Qi, Michael Slootsky
  • Stacked White OLED Having Separate Red, Green and Blue Sub-Elements
    Publication number: 20160276614
    Abstract: The present invention relates to efficient organic light emitting devices (OLEDs). More specifically, the present invention relates to white-emitting OLEDs, or WOLEDs. The devices of the present invention employ three emissive sub-elements, typically emitting red, green and blue, to sufficiently cover the visible spectrum. The sub-elements are separated by charge generating layers.
    Type: Application
    Filed: May 27, 2016
    Publication date: September 22, 2016
    Inventors: Stephen Forrest, Xiangfei Qi, Michael Slootsky
  • Stacked white OLED having separate red, green and blue sub-elements
    Patent number: 9379346
    Abstract: The present invention relates to efficient organic light emitting devices (OLEDs). More specifically, the present invention relates to white-emitting OLEDs, or WOLEDs. The devices of the present invention employ three emissive sub-elements, typically emitting red, green and blue, to sufficiently cover the visible spectrum. The sub-elements are separated by charge generating layers.
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: June 28, 2016
    Assignee: The Regents of the University of Michigan
    Inventors: Stephen Forrest, Xiangfei Qi, Michael Slootsky
  • Stacked White OLED Having Separate Red, Green and Blue Sub-Elements
    Publication number: 20150287950
    Abstract: The present invention relates to efficient organic light emitting devices (OLEDs). More specifically, the present invention relates to white-emitting OLEDs, or WOLEDs. The devices of the present invention employ three emissive sub-elements, typically emitting red, green and blue, to sufficiently cover the visible spectrum. The sub-elements are separated by charge generating layers.
    Type: Application
    Filed: June 22, 2015
    Publication date: October 8, 2015
    Applicant: THE REGENTS OF THE UNIVERSITY OF MICHIGAN
    Inventors: Stephen Forrest, Xiangfei Qi, Michael Slootsky
  • Stacked white OLED having separate red, green and blue sub-elements
    Patent number: 9065067
    Abstract: The present invention relates to efficient organic light emitting devices (OLEDs). More specifically, the present invention relates to white-emitting OLEDs, or WOLEDs. The devices of the present invention employ three emissive sub-elements, typically emitting red, green and blue, to sufficiently cover the visible spectrum. The sub-elements are separated by charge generating layers.
    Type: Grant
    Filed: May 27, 2014
    Date of Patent: June 23, 2015
    Assignee: The Regents of the University of Michigan
    Inventors: Stephen Forrest, Xiangfei Qi, Michael Slootsky
  • Stacked White OLED Having Separate Red, Green and Blue Sub-Elements
    Publication number: 20140361271
    Abstract: The present invention relates to efficient organic light emitting devices (OLEDs). More specifically, the present invention relates to white-emitting OLEDs, or WOLEDs. The devices of the present invention employ three emissive sub-elements, typically emitting red, green and blue, to sufficiently cover the visible spectrum. The sub-elements are separated by charge generating layers.
    Type: Application
    Filed: May 27, 2014
    Publication date: December 11, 2014
    Applicant: The Regents of the University of Michigan
    Inventors: Stephen Forrest, Xiangfei Qi, Michael Slootsky
  • Stacked white OLED having separate red, green and blue sub-elements
    Patent number: 8766291
    Abstract: The present invention relates to efficient organic light emitting devices (OLEDs). The devices employ three emissive sub-elements, typically emitting red, green and blue, to sufficiently cover the visible spectrum. Thus, the devices may be white-emitting OLEDs, or WOLEDs. Each sub-element comprises at least one organic layer which is an emissive layer—i.e., the layer is capable of emitting light when a voltage is applied across the stacked device. The sub-elements are vertically stacked and are separated by charge generating layers. The charge-generating layers are layers that inject charge carriers into the adjacent layer(s) but do not have a direct external connection.
    Type: Grant
    Filed: October 28, 2009
    Date of Patent: July 1, 2014
    Assignee: The Regents of the University of Michigan
    Inventors: Stephen Forrest, Xiangfei Qi, Michael Slootsky
  • System and method for depositing thin layers on non-planar substrates by stamping
    Patent number: 8631759
    Abstract: An elastomeric stamp is used to deposit material on a non-planar substrate. A vacuum mold is used to deform the elastomeric stamp and pressure is applied to transfer material from the stamp to the substrate. By decreasing the vacuum applied by the vacuum mold, the elasticity of the stamp may be used to apply this pressure. Pressure also may be applied by applying a force to the substrate and/or the stamp. The use of an elastomeric stamp allows for patterned layers to be deposited on a non-planar substrate with reduced chance of damage to the patterned layer.
    Type: Grant
    Filed: February 1, 2010
    Date of Patent: January 21, 2014
    Assignees: The Trustees Of Princeton University, The Regents Of The University Of Michigan
    Inventors: Stephen Forrest, Xin Xu, Xiangfei Qi, Marcelo Davanco
  • STACKED WHITE OLED HAVING SEPARATE RED, GREEN AND BLUE SUB-ELEMENTS
    Publication number: 20110248249
    Abstract: The present invention relates to efficient organic light emitting devices (OLEDs). More specifically, the present invention relates to white-emitting OLEDs, or WOLEDs. The devices of the present invention employ three emissive sub-elements, typically emitting red, green and blue, to sufficiently cover the visible spectrum. The sub-elements are separated by charge generating layers.
    Type: Application
    Filed: October 28, 2009
    Publication date: October 13, 2011
    Inventors: Stephen Forrest, Xiangfei Qi, Michael Slootsky
  • System and Method for Depositing Thin Layers on Non-Planar Substrates by Stamping
    Publication number: 20100189837
    Abstract: An elastomeric stamp is used to deposit material on a non-planar substrate. A vacuum mold is used to deform the elastomeric stamp and pressure is applied to transfer material from the stamp to the substrate. By decreasing the vacuum applied by the vacuum mold, the elasticity of the stamp may be used to apply this pressure. Pressure also may be applied by applying a force to the substrate and/or the stamp. The use of an elastomeric stamp allows for patterned layers to be deposited on a non-planar substrate with reduced chance of damage to the patterned layer.
    Type: Application
    Filed: February 1, 2010
    Publication date: July 29, 2010
    Applicants: The Regents of the University of Michigan, The Trustees of Princeton University
    Inventors: Stephen Forrest, Xin Xu, Xiangfei Qi, Marcelo Davanco
  • System and method for depositing thin layers on non-planar substrates by stamping
    Patent number: 7678423
    Abstract: An elastomeric stamp is used to deposit material on a non-planar substrate. A vacuum mold is used to deform the elastomeric stamp and pressure is applied to transfer material from the stamp to the substrate. By decreasing the vacuum applied by the vacuum mold, the elasticity of the stamp may be used to apply this pressure. Pressure also may be applied by applying a force to the substrate and/or the stamp. The use of an elastomeric stamp allows for patterned layers to be deposited on a non-planar substrate with reduced chance of damage to the patterned layer.
    Type: Grant
    Filed: February 27, 2007
    Date of Patent: March 16, 2010
    Assignees: The Regents of the University of Michigan, The Trustees of Princeton University
    Inventors: Stephen Forrest, Xin Xu, Xiangfei Qi, Marcelo Davanco
  • System and method for depositing thin layers on non-planar substrates by stamping
    Publication number: 20080202673
    Abstract: An elastomeric stamp is used to deposit material on a non-planar substrate. A vacuum mold is used to deform the elastomeric stamp and pressure is applied to transfer material from the stamp to the substrate. By decreasing the vacuum applied by the vacuum mold, the elasticity of the stamp may be used to apply this pressure. Pressure also may be applied by applying a force to the substrate and/or the stamp. The use of an elastomeric stamp allows for patterned layers to be deposited on a non-planar substrate with reduced chance of damage to the patterned layer.
    Type: Application
    Filed: February 27, 2007
    Publication date: August 28, 2008
    Inventors: Stephen Forrest, Xin Xu, Xiangfei Qi, Marcelo Davanco