Patents by Inventor Paul Burrows

Paul Burrows 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: 6582838
    Abstract: Dopant compounds of Formula I below for use in organic light emitting devices (OLED's) as device elements capable of emitting light of wavelengths associated with saturated red emissions. OLEDs utilize device elements comprising the above compounds and display devices are based on those OLED's.
    Type: Grant
    Filed: October 9, 2001
    Date of Patent: June 24, 2003
    Assignees: The Trustees of Princeton University, The University of Southern California
    Inventors: Paul Burrows, Stephen R. Forrest, Mark E. Thompson
  • Publication number: 20020176992
    Abstract: A novel class of low reflectivity, high transparency, non-metallic cathodes useful for a wide range of electrically active, transparent organic devices are disclosed. As a representative embodiment, the highly transparent non-metallic cathode of an OLED employs a thin film of copper phthalocyanine (CuPc) capped with a film of low-power, radio-frequency sputtered indium-tin-oxide (ITO). The CuPc prevents damage to the underlying organic layers during the ITO sputtering process. A theory of the invention is presented which suggests that damage-induced states at the non-metallic cathode/organic film interface are responsible for the efficient electron injection properties of the cathode. Due to the low reflectivity of the non-metallic cathode, a non-antireflection-coated, non-metallic-cathode-containing TOLED is disclosed that is 85% transmissive in the visible, emitting nearly identical amounts of light in the forward and back-scattered directions.
    Type: Application
    Filed: July 15, 2002
    Publication date: November 28, 2002
    Inventors: Gautam Parthasarathy, Paul Burrows, Stephen R. Forrest
  • Patent number: 6469437
    Abstract: Organic light emitting devices are disclosed which include a heterostructure for producing electroluminescence wherein the heterostructure includes a non-metallic cathode. As a representative embodiment of the present invention, the heterostructure for producing electroluminescence includes in order, a non-metallic cathode layer (1), an electron injecting interface layer (6), an electron transporting layer (2), a hole transporting layer (3), and an anode layer (4); wherein the non-metallic cathode layer (1) includes an indium-tin oxide layer in contact with a copper phthalocyanine layer which functions as the electron injecting interface layer (6).
    Type: Grant
    Filed: November 5, 1997
    Date of Patent: October 22, 2002
    Assignee: The Trustees of Princeton University
    Inventors: Gautam Parthasarathy, Paul Burrows, Stephen R. Forrest
  • Patent number: 6420031
    Abstract: A novel class of low reflectivity, high transparency, non-metallic cathodes useful for a wide range of electrically active, transparent organic devices are disclosed. As a representative embodiment, the highly transparent non-metallic cathode of an OLED employs a thin film of copper phthalocyanine (CuPc) capped with a film of low-power, radio-frequency sputtered indium-tin-oxide (ITO). The CuPc prevents damage to the underlying organic layers during the ITO sputtering process. A theory of the invention is presented which suggests that damage-induced states at the non-metallic cathode/organic film interface are responsible for the efficient electron injection properties of the cathode. Due to the low reflectivity of the non-metallic cathode, a non-antireflection-coated, non-metallic-cathode-containing TOLED is disclosed that is 85% transmissive in the visible, emitting nearly identical amounts of light in the forward and back-scattered directions.
    Type: Grant
    Filed: April 3, 1998
    Date of Patent: July 16, 2002
    Assignee: The Trustees of Princeton University
    Inventors: Gautam Parthasarathy, Paul Burrows, Stephen R. Forrest
  • Patent number: 6396860
    Abstract: An optically-pumped laser having a small-molecule thin organic film of DCM doped Alq3. Carrier transport properties of the small-molecule organic materials, combined with a low lasing threshold provide a new generation of diode lasers employing organic thin films. An electrically-pumped variant is also described.
    Type: Grant
    Filed: August 25, 2000
    Date of Patent: May 28, 2002
    Assignee: The Trustees of Princeton University
    Inventors: Vladimir Kozlov, Stephen R. Forrest, Paul Burrows, Vladimir Bulovic
  • Publication number: 20020058103
    Abstract: An organic light emitting device (OLED) is disclosed for which the hole transporting layer, the electron transporting layer and/or the emissive layer, if separately present, is comprised of a non-polymeric material. A method for preparing such OLED's using vacuum deposition techniques is further disclosed.
    Type: Application
    Filed: October 27, 1997
    Publication date: May 16, 2002
    Inventors: GONG GU, PAUL BURROWS, STEPHEN R. FORREST
  • Publication number: 20020034660
    Abstract: Disclosed herein are novel dopant compounds of Formula I below, wherein those compounds are used in organic light emitting devices (OLED's) for device elements capable of emitting light of wavelengths associated with saturated red emissions.
    Type: Application
    Filed: October 9, 2001
    Publication date: March 21, 2002
    Inventors: Paul Burrows, Stephen R. Forrest, Mark E. Thompson
  • Patent number: 6329085
    Abstract: Dopant compounds of Formula I below for use in organic light emitting devices (OLED's) as device elements capable of emitting light of wavelengths associated with saturated red emissions. OLED's utilize device elements comprising the above compounds and display devices are based on those OLED's.
    Type: Grant
    Filed: July 21, 1999
    Date of Patent: December 11, 2001
    Assignees: The Trustees of Princeton University, The University of Southern California
    Inventors: Paul Burrows, Stephen R. Forrest, Mark E. Thompson
  • Patent number: 6297516
    Abstract: A patterning system with a photoresist overhang allows material to be deposited onto a substrate in various positions by varying the angle from which the material is deposited, and by rotating the substrate. The patterning system can be used to fabricate a stack of organic light emitting devices on a substrate using the same patterning system and without removing the substrate from vacuum.
    Type: Grant
    Filed: June 25, 1999
    Date of Patent: October 2, 2001
    Assignee: The Trustees of Princeton University
    Inventors: Stephen R. Forrest, Vladimir Bulovic, Paul Burrows
  • Patent number: 6232714
    Abstract: Optical cavities in a stacked organic light emitting device (SOLEDs) can shift or attenuate the light emitted by the individual organic light emitting devices (OLEDs) in the stack. Interference caused by reflections within the stack, absorption, positioning of the light source, and the polarization of the emitted light can all determine how the spectra of the emitted light are affected by the SOLED structure. A detailed model that provides a good fit to measured SOLED emissions can be used to predict how a SOLED will affect light emitted by OLEDs. As a result, SOLED geometries that will optimize color saturation and external quantum efficiency can be predicted.
    Type: Grant
    Filed: April 14, 1999
    Date of Patent: May 15, 2001
    Assignee: The Trustees of Princeton University
    Inventors: Zilan Shen, Stephen R. Forrest, Paul Burrows
  • Patent number: 6160828
    Abstract: Organic vertical-cavity surface-emitting lasers ("OVCSELs"), in which a thin layer of organic material is disposed between highly reflective mirrors to thereby form a vertical cavity within a stacked arrangement. The lasers of the present invention each comprise a first mirror layer; a layer of active organic material over the first mirror layer; and a second mirror layer over the layer of first active organic material. The active organic material lases when pumped to thereby produce laser light. The present invention provides for optical semiconductor lasers with desired properties such as narrow bandwidth emission, the minimal use of active organic materials, and the facilitation of wavelength tuning and electrical pumping.
    Type: Grant
    Filed: January 22, 1998
    Date of Patent: December 12, 2000
    Assignee: The Trustees of Princeton University
    Inventors: Vladimir Kozlov, Stephen R. Forrest, Paul Burrows, Vladimir Bulovic
  • Patent number: 6125226
    Abstract: Light emitting devices comprising a transparent substrate, a reflective layer on the substrate having at least one opening therein, a waveguiding layer on said reflective layer, and at least one OLED on the waveguiding layer for emitting light of a predetermined color. The light emitted from each OLED is directed through the at least one opening in the reflective layer for emission through the substrate.
    Type: Grant
    Filed: April 18, 1997
    Date of Patent: September 26, 2000
    Assignee: The Trustees of Princeton University
    Inventors: Stephen R. Forrest, Paul Burrows, Dimitri Z. Garbuzov
  • Patent number: 6111902
    Abstract: An optically-pumped laser having a small-molecule thin organic film of DCM doped Alq.sub.3. Carrier transport properties of the small-molecule organic materials, combined with a low lasing threshold provide a new generation of diode lasers employing organic thin films. An electrically-pumped variant is also described.
    Type: Grant
    Filed: May 19, 1997
    Date of Patent: August 29, 2000
    Assignee: The Trustees of Princeton University
    Inventors: Vladimir Kozlov, Stephen R. Forrest, Paul Burrows, Vladimir Bulovic
  • Patent number: 6091195
    Abstract: A multicolor organic light emitting display device employs angle-walled blue, green and red emitting mesas, with optional metal reflectors on the angled walls, in a plurality of pixels. The angle-walled mesas, which resemble truncated pyramids, direct light out of the mesa by reflection from the mesa side walls or by mirror reflection. The device of the present invention reduces waveguiding, thus simultaneously increasing both display brightness and resolution.
    Type: Grant
    Filed: February 3, 1997
    Date of Patent: July 18, 2000
    Assignee: The Trustees of Princeton University
    Inventors: Stephen R. Forrest, Paul Burrows, Dmitri Z. Garbuzov
  • Patent number: 6048630
    Abstract: Disclosed herein are novel dopant compounds of Formula I below, wherein those compounds are used in organic light emitting devices (OLED's) for device elements capable of emitting light of wavelengths associated with saturated red emissions. ##STR1## Also disclosed are OLED's utilizing device elements comprising the above compounds and display devices based on those OLED's.
    Type: Grant
    Filed: December 23, 1996
    Date of Patent: April 11, 2000
    Assignees: The Trustees of Princeton University, The University of Southern California
    Inventors: Paul Burrows, Stephen R. Forrest, Mark E. Thompson
  • Patent number: 6045930
    Abstract: Disclosed herein are organic light emitting devices in which emitting layers (EL) comprise a suitable receiving compound according to Formulas I and II: ##STR1## wherein M is an ion of a divalent or trivalent metal atom, wherein n=3 when M is trivalent, and n=2 when M is divalent, wherein the metal atom is selected from the group consisting of aluminum, gallium, indium, and zinc, and wherein X, Y, and Z are each individually and independently C or N, such that at least two of X, Y and Z are N; and ##STR2## wherein R is alkyl, phenyl, substituted alkyl, substituted phenyl, trimethylsilyl, or substituted trimethylsilyl.Also disclosed are OLED's utilizing device elements comprising the above compounds and display devices based on those OLED's.
    Type: Grant
    Filed: May 2, 1997
    Date of Patent: April 4, 2000
    Assignees: The Trustees of Princeton University, The University of Southern California
    Inventors: Mark E. Thompson, Jon A. Cronin, Stephen R. Forrest, Paul Burrows
  • Patent number: 6046543
    Abstract: An organic light emitting device (OLED) having an inverted structure including a cathode layer which is deposited on a substrate and on top of which an electron transporting layer (ETL), an electroluminescent (EL) layer, a hole transporting layer (HTL), a protection layer and an anode are deposited in sequence. The inverted OLED (IOLED) provides improved longevity, flexibility and efficiency over conventional OLEDs.
    Type: Grant
    Filed: December 23, 1996
    Date of Patent: April 4, 2000
    Assignee: The Trustees of Princeton University
    Inventors: Vladimir Bulovic, Stephen R. Forrest, Paul Burrows, Dmitri Z. Garbuzov
  • Patent number: 6013538
    Abstract: A multiple layer patterning system with an undercut allows the deposition of a material onto a substrate from a direction substantially perpendicular to the substrate, followed by the angular deposition of a protective cap. Because of the angular deposition, the protective cap extends into the undercut and completely covers and surrounds any previously exposed surface of the material. The material is thereby protected from subsequent exposure to substances that may be deleterious.
    Type: Grant
    Filed: November 24, 1997
    Date of Patent: January 11, 2000
    Assignee: The Trustees of Princeton University
    Inventors: Paul Burrows, Stephen R. Forrest, Peifang Tian
  • Patent number: 5998803
    Abstract: The present invention is directed to organic light emitting devices comprised of a heterostructure for producing electroluminescence, wherein the heterostructure includes a hole injection enhancement layer between a hole transporting layer and an indium tin oxide anode layer. The hole injection enhancement layer may be comprised of 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA), bis(1,2,5-thiadiazolo)-p-quinobis(1,3-dithiole) (BTQBT), or other suitable, rigid organic materials. The present invention is further directed to methods of fabricating such devices.
    Type: Grant
    Filed: May 29, 1997
    Date of Patent: December 7, 1999
    Assignees: The Trustees of Princeton University, The University of Southern California
    Inventors: Stephen Forrest, Paul Burrows, Mark E. Thompson, Vladimir Bulovic
  • Patent number: 5986401
    Abstract: A high contrast organic light emitting device (OLED) display utilizing a transparent (TOLED) display structure with a low-reflectance absorber arranged behind the display. The TOLED display allows substantially all light incident on the display to pass through the display and to be absorbed by the low-reflectance absorber With the amount of light reflected by the display thus substantially reduced, the contrast of images displayed by the display is thus improved.
    Type: Grant
    Filed: March 20, 1997
    Date of Patent: November 16, 1999
    Assignees: The Trustee of Princeton University, The University of Southern California
    Inventors: Mark E. Thompson, Stephen R. Forrest, Paul Burrows