Patents by Inventor Kevin P. Klubek
Kevin P. Klubek 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).
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Publication number: 20090053559Abstract: An OLED device having two spaced electrodes, and including a first light-emitting layer that produces green emission and includes an anthracene host and a 2,6-diaminoanthracene light-emitting dopant, and a second light-emitting layer that produces red emission and includes a host and a red light-emitting dopant.Type: ApplicationFiled: August 20, 2007Publication date: February 26, 2009Inventors: Jeffrey P. Spindler, Tukaram K. Hatwar, Kevin P. Klubek
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Publication number: 20090004365Abstract: An OLED includes an anode formed over a substrate and a contaminant-scavenging layer formed over the anode, wherein the contaminant-scavenging layer includes one or more organic materials but not a hexaazatriphenylene derivative, each having an electron-accepting property and a reduction potential greater than ?0.1 V vs. a Saturated Calomel Electrode, and wherein the one or more organic materials provide more than 50% by mole ratio of the contaminant-scavenging layer. The OLED also includes an organic electroluminescent unit formed over the contaminant-scavenging layer, wherein the organic electroluminescent unit includes a hole-transporting layer, a light-emitting layer, and an electron-transporting layer, and a cathode formed over the organic electroluminescent unit.Type: ApplicationFiled: September 8, 2008Publication date: January 1, 2009Inventors: Liang-Sheng Liao, Kevin P. Klubek, Wojciech K. Slusarek, Tukaram K. Hatwar
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Publication number: 20080284318Abstract: An electroluminescent device comprises a) a fluorescent light emitting layer comprising a fluorescent emitter and a fluorescent host material wherein the HOMO energy level of the fluorescent host material is not more than 0.1 eV more negative than that of the fluorescent emitter; b) a phosphorescent light emitting layer comprising a phosphorescent emitter and a phosphorescent host material; and c) a spacer layer interposed between the fluorescent light emitting layer and the phosphorescent light emitting layer; wherein the triplet energy of the fluorescent host material is not more than 0.2 eV less than the triplet energy of both the spacer layer material and of the phosphorescent host material. The materials within these layers are selected so that the HOMO and triplet energy levels satisfy certain interrelationships. The invention provides devices that emit light with high luminous efficiency.Type: ApplicationFiled: May 17, 2007Publication date: November 20, 2008Inventors: Joseph C. Deaton, Denis Y. Kondakov, Marina E. Kondakava, Kevin P. Klubek, Dustin L. Comfort
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Publication number: 20080284317Abstract: An organic light-emitting device (OLED) including an anode; a cathode; a blue light-emitting layer disposed between the anode and the cathode and includes at least one blue host and at least one fluorescent blue dopant; a first light-emitting layer disposed between the anode and the blue light-emitting layer, including a first phosphorescent dopant and a host; and a second light-emitting layer disposed between the blue light-emitting layer and the cathode, including a second phosphorescent dopant and a host.Type: ApplicationFiled: May 17, 2007Publication date: November 20, 2008Inventors: Liang-Sheng Liao, Kevin P. Klubek, Joseph C. Deaton, Cynthia A. Pellow
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Publication number: 20080182129Abstract: An OLED device comprises a cathode, an anode, and has therebetween a light-emitting layer wherein the light-emitting layer comprises (a) a 2-arylanthracene compound and (b) a light-emitting second anthracene compound having amino substitution at a minimum of two positions, wherein at least one amine is substituted at the 2 position of the second anthracene compound.Type: ApplicationFiled: January 30, 2007Publication date: July 31, 2008Inventors: Kevin P. Klubek, Liang-Sheng Liao, Viktor V. Jarikov, Denis Y. Kondakov, William J. Begley, Michele L. Ricks
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Patent number: 7368178Abstract: An organic light-emitting device includes a substrate, an anode, and a cathode disposed over the substrate, and a luminescent layer disposed between the anode and the cathode wherein the luminescent layer includes a host and at least one dopant. The host of the luminescent layer is selected to include a solid organic material comprising a mixture of at least two components, wherein the first component is an organic compound containing an aminoanthracene.Type: GrantFiled: January 8, 2004Date of Patent: May 6, 2008Assignee: Eastman Kodak CompanyInventors: Kevin P. Klubek, Ching W. Tang
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Patent number: 7273663Abstract: A tandem white OLED device includes an anode, a cathode, and a plurality of organic electroluminescence units disposed between the anode and the cathode, wherein each organic electroluminescence unit includes at least one light-emitting layer, and wherein each organic electroluminescence unit emits white light. The device also includes an intermediate connector disposed between each adjacent organic electroluminescence unit, wherein the intermediate connector includes at least two different layers, and wherein the intermediate connector has no direct connection to an external power source.Type: GrantFiled: August 20, 2004Date of Patent: September 25, 2007Assignee: Eastman Kodak CompanyInventors: Liang-Sheng Liao, Tukaram K. Hatwar, Kevin P. Klubek, Ching W. Tang
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Patent number: 7211948Abstract: An organic electroluminescent device includes an anode; a hole-transporting layer disposed over the anode, a light-emitting layer disposed over the hole-transporting layer for producing light in response to hole-electron recombination, and an electron-transporting layer disposed over the light-emitting layer. The device also includes a crystallization-inhibitor incorporated within the electron-transporting layer, wherein the crystallization-inhibitor prevents the electron-transporting layer from crystallizing during operation, and a cathode disposed over the electron-transporting layer.Type: GrantFiled: January 13, 2004Date of Patent: May 1, 2007Assignee: Eastman Kodak CompanyInventors: Liang-Sheng Liao, Kevin P. Klubek
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Patent number: 7138763Abstract: An organic light-emitting device with enhanced operational stability comprising an anode; a hole-transporting layer disposed over the anode; a light-emitting layer disposed over the hole-transporting layer for producing light in response to hole-electron recombination, wherein the light-emitting layer includes at least one organic host material and one organic luminescent dopant material; a stability-enhancing layer disposed in contact with the light-emitting layer, wherein the stability-enhancing layer includes at least one organic host material and one inorganic dopant material; an electron-transporting layer disposed over the stability-enhancing layer; and a cathode disposed over the electron-transporting layer.Type: GrantFiled: November 14, 2003Date of Patent: November 21, 2006Assignee: Eastman Kodak CompanyInventors: Liang-Sheng Liao, Kevin P. Klubek
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Patent number: 7075231Abstract: A tandem OLED includes an anode, a cathode, and at least two electroluminescent units disposed between the anode and the cathode, wherein each of the electroluminescent units includes at least one hole-injecting layer, one hole-transporting layer, one organic light-emitting layer, one electron-transporting layer, and one electron-injecting layer. The OLED also includes at least one intermediate connector, wherein each of the intermediate connectors includes at least one layer, and wherein each of the intermediate connectors is disposed between electroluminescent units, wherein the thickness of each layer in each of the electroluminescent units and the intermediate connectors is selected to satisfy the test condition that the voltage drop from the anode to the cathode is less than 4.0 V×N (the number of electroluminescent units) at 20 mA/cm2.Type: GrantFiled: January 3, 2005Date of Patent: July 11, 2006Assignee: Eastman Kodak CompanyInventors: Liang-Sheng Liao, Tukaram K. Hatwar, Kevin P. Klubek, J. Ramon Vargas, Dustin L. Comfort
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Patent number: 7037599Abstract: An OLED device comprising a substrate, an anode electrode and a cathode electrode, a uniaxial alignment layer disposed between the anode electrode and the cathode electrode, a light-emitting layer disposed over the uniaxial alignment layer and capable of producing polarized light, and a carrier confinement layer disposed over the light emitting layer and wherein the carrier confinement layer blocks either holes, electrons, or excitons. The light-emitting layer includes an oligomeric fluorene or a mixture of oligomeric fluorenes.Type: GrantFiled: February 28, 2003Date of Patent: May 2, 2006Assignee: Eastman Kodak CompanyInventors: Sean W. Culligan, Yanhou Geng, Shaw H. Chen, Kevin P. Klubek, Kathleen M. Vaeth, Ching W. Tang
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Patent number: 7030554Abstract: A full-color organic display for displaying a color image, including an array of pixels arranged in repeating patterns, wherein each pixel has red, green, and blue light-emitting subpixels, and wherein each red and green light-emitting subpixel contains only one EL unit, while each blue light-emitting subpixel contains more than one vertically stacked EL unit.Type: GrantFiled: February 6, 2004Date of Patent: April 18, 2006Assignee: Eastman Kodak CompanyInventors: Liang-Sheng Liao, Kevin P. Klubek, Ching W. Tang
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Patent number: 6991859Abstract: A cascaded organic electroluminescent device includes an anode, a cathode, and a plurality of organic electroluminescent units disposed between the anode and the cathode, wherein the organic electroluminescent units comprise at least a hole-transporting layer and an electron-transporting layer. The device also includes a connecting unit disposed between each adjacent organic electroluminescent unit, wherein the connecting unit comprises, in sequence, an n-type doped organic layer, and a p-type doped organic layer wherein the p-type doped organic layer includes a dihydrophenazine derivative compound.Type: GrantFiled: March 18, 2003Date of Patent: January 31, 2006Assignee: Eastman Kodak CompanyInventors: Kevin P. Klubek, Liang-Sheng Liao, Ching W. Tang, J. Ramon Vargas
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Patent number: 6936961Abstract: A cascaded organic electroluminescent device includes an anode and a cathode. The device also includes a plurality of organic electroluminescent units disposed between the anode and the cathode, wherein the organic electroluminescent units comprise at least a hole-transporting layer, an electron-transporting layer, and an electroluminescent zone formed between the hole-transporting layer and the electron-transporting layer wherein the physical spacing between adjacent electroluminescent zones is more than 90 nm; and a connecting unit disposed between each adjacent organic electroluminescent unit, wherein the connecting unit comprises, in sequence, an n-type doped organic layer and a p-type doped organic layer forming a transparent p-n junction structure wherein the resistivity of each of the doped layers is higher than 10 ?-cm.Type: GrantFiled: May 13, 2003Date of Patent: August 30, 2005Assignee: Eastman Kodak CompanyInventors: Liang-Sheng Liao, Kevin P. Klubek, Dustin L. Comfort, Ching W. Tang
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Patent number: 6919140Abstract: A multilayer electroluminescent device comprising a cathode, an anode, a light emitting layer, and a layer disposed between the cathode and anode containing a dihydrophenazine compound is disclosed.Type: GrantFiled: July 10, 2003Date of Patent: July 19, 2005Assignee: Eastman Kodak CompanyInventors: Kevin P. Klubek, J. Ramon Vargas, Liang-Sheng Liao
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Patent number: 6881502Abstract: An organic electroluminescent device includes an anode; a hole-transporting layer disposed over the anode; a light-emitting layer disposed over the hole-transporting layer for producing blue light in response to hole-electron recombination, wherein the light emitting layer includes at least one host material and at least one dopant material; a non-hole-blocking buffer layer formed in contact with the light-emitting layer, wherein the non-hole-blocking buffer layer has substantially the same ionization potential and the same electron affinity as those of one of the host materials in the light-emitting layer; an electron-transporting layer disposed over the non-hole-blocking buffer layer; and a cathode disposed over the electron-transporting layer.Type: GrantFiled: September 24, 2003Date of Patent: April 19, 2005Assignee: Eastman Kodak CompanyInventors: Liang-Sheng Liao, Kevin P. Klubek
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Patent number: 6869699Abstract: A p-type mixture for use in an electronic device including a host including a dihydrophenazine compound, and a dopant provided in the host.Type: GrantFiled: March 18, 2003Date of Patent: March 22, 2005Assignee: Eastman Kodak CompanyInventors: Kevin P. Klubek, Liang-Sheng Liao, J. Ramon Vargas, Ching W. Tang
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Patent number: 6853133Abstract: An organic light-emitting device with improved performance including an anode formed over a substrate; a hole-transporting layer formed over the anode; and a light emitting layer formed over the hole-transporting layer for producing light in response to hole-electron recombination. The organic light-emitting device also includes an emission-protecting layer formed over the light-emitting layer, wherein the emission-protecting layer includes one or more materials selected to resist the surface contamination on the organic light-emitting layer and to ensure that there will be less surface contamination than if such layer had not been provided; an electron-transporting layer formed over the emission-protecting layer; and a cathode formed over the electron-transporting layer.Type: GrantFiled: May 7, 2003Date of Patent: February 8, 2005Assignee: Eastman Kodak CompanyInventors: Liang-Sheng Liao, Kevin P. Klubek, Dustin L. Comfort
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Publication number: 20040227460Abstract: A cascaded organic electroluminescent device includes an anode and a cathode. The device also includes a plurality of organic electroluminescent units disposed between the anode and the cathode, wherein the organic electroluminescent units comprise at least a hole-transporting layer, an electron-transporting layer, and an electroluminescent zone formed between the hole-transporting layer and the electron-transporting layer wherein the physical spacing between adjacent electroluminescent zones is more than 90 nm; and a connecting unit disposed between each adjacent organic electroluminescent unit, wherein the connecting unit comprises, in sequence, an n-type doped organic layer and a p-type doped organic layer forming a transparent p-n junction structure wherein the resistivity of each of the doped layers is higher than 10 &OHgr;-cm.Type: ApplicationFiled: May 13, 2003Publication date: November 18, 2004Applicant: Eastman Kodak CompanyInventors: Liang-Sheng Liao, Kevin P. Klubek, Dustin L. Comfort, Ching W. Tang
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Publication number: 20040222738Abstract: An organic light-emitting device with improved performance including an anode formed over a substrate; a hole-transporting layer formed over the anode; and a light-emitting layer formed over the hole-transporting layer for producing light in response to hole-electron recombination. The organic light-emitting device also includes an emission-protecting layer formed over the light-emitting layer, wherein the emission-protecting layer includes one or more materials selected to resist the surface contamination on the organic light-emitting layer and to ensure that there will be less surface contamination than if such layer had not been provided; an electron-transporting layer formed over the emission-protecting layer; and a cathode formed over the electron-transporting layer.Type: ApplicationFiled: May 7, 2003Publication date: November 11, 2004Applicant: Eastman Kodak CompanyInventors: Liang-Sheng Liao, Kevin P. Klubek, Dustin L. Comfort