Patents by Inventor David J. Giesen
David J. Giesen 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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Patent number: 8247088Abstract: An OLED device including a cathode, an anode, and having therebetween a phosphorescent light-emitting layer that contains a light-emitting organometallic complex including a precious metal, a first ligand including an imidazole group and a second nitrogen heterocycle group, and at least one second different ligand.Type: GrantFiled: August 28, 2008Date of Patent: August 21, 2012Assignee: Global OLED Technology LLCInventors: Xiaofan Ren, Joseph C. Deaton, David J. Giesen
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Publication number: 20100244677Abstract: The invention provides an OLED device including a cathode, an anode, and having therebetween a light-emitting layer, further includes, between the cathode and the light emitting layer: a) a first layer containing a silyl-fluoranthene compound including a fluoranthene nucleus having a silicon atom bonded to the 8- or 9-position, and wherein the silicon atom is further bonded to three independently selected substituents; and b) a second layer, located between the first layer and the cathode and contiguous to the first layer, and wherein: i) the second layer contains an alkali metal or an organic alkali metal compound; or ii) the second layer contains an azine compound. Embodiments of the invention can provide an OLED device with improved luminance and reduced drive voltage.Type: ApplicationFiled: March 31, 2009Publication date: September 30, 2010Inventors: William J. Begley, David J. Giesen
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Publication number: 20100052516Abstract: An OLED device including a cathode, an anode, and having therebetween a phosphorescent light-emitting layer that contains a light-emitting organometallic complex including a precious metal, a first ligand including an imidazole group and a second nitrogen heterocycle group, and at least one second different ligand.Type: ApplicationFiled: August 28, 2008Publication date: March 4, 2010Inventors: Xiaofan Ren, Joseph C. Deaton, David J. Giesen
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Patent number: 7462405Abstract: Disclosed is an electroluminescent device comprising a light-emitting layer containing a light emitting phosphorescent material that contains an organometallic complex comprising a metal selected from the group consisting of Mo, W, Re, Ru, and Os that is coordinated to a neutral or negatively-charged ligand group through the ? electrons of the ligand with a hapticity greater than 2. The device provides useful light emissions.Type: GrantFiled: October 27, 2004Date of Patent: December 9, 2008Assignee: Eastman Kodak CompanyInventors: Tommie L. Royster, Jr., David J. Giesen, Adam Freeman
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Publication number: 20080286610Abstract: An electroluminescent device comprises a cathode and an anode; and located therebetween, a fluorescent light-emitting layer (LEL) comprising at least one fluorescent emitter and a host, together with at least one phosphorescent light-emitting layer comprising at least one phosphorescent emitter and a host, and having a spacer layer interposed between the fluorescent and phosphorescent light-emitting layers. The materials within these layers are selected so that the triplet energy levels of certain components satisfy certain interrelationships. The invention provides devices that emit light with high luminous efficiency at low voltage.Type: ApplicationFiled: May 17, 2007Publication date: November 20, 2008Inventors: Joseph C. Deaton, Marina E. Kondakova, David J. Giesen, William J. Begley, Denis Y. Kondakov
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Patent number: 7419728Abstract: An OLED device comprises an anode and a cathode and having therebetween a light emitting layer containing an emissive material, wherein a layer between the anode and cathode contains a phosphineoxide compound bearing two or more tri(hetero)arylphosphineoxide groups, provided these groups are selected to give a compound with a Et?2.65 eV.Type: GrantFiled: May 31, 2005Date of Patent: September 2, 2008Assignee: Eastman Kodak CompanyInventors: Xiaofan Ren, David J. Giesen
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Patent number: 7147937Abstract: Disclosed is an electroluminescent device comprising a light-emitting layer including a light emitting material that contains an organometallic complex comprising (1) a metal selected from the group consisting of Ir, Rh, Os, Pt, and Pd and (2) a diazole group ligand wherein the ligand has a fused aromatic ring group including a nitrogen of the diazole as a bridgehead nitrogen. The device provides useful light emission.Type: GrantFiled: December 5, 2003Date of Patent: December 12, 2006Assignee: Eastman Kodak CompanyInventors: Barbara B. Lussier, Joseph C. Deaton, David J. Giesen
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Patent number: 7118812Abstract: An electroluminescent device comprises a light-emitting layer containing a light emitting phosphorescent material that contains an organometallic complex comprising iridium fully complexed with indole ligand groups or comprising Ir, Rh, Os, Ru, Pt, and Pd and an isoindole compound. The invention further comprises compositions of certain such complexes as well as a display or area lighting devices and a process for emitting light. The organometallic materials function as useful phosphorescent light emitting materials in electroluminescent devices.Type: GrantFiled: December 5, 2003Date of Patent: October 10, 2006Assignee: Eastman Kodak CompanyInventors: Joseph C. Deaton, Margaret J. Helber, David J. Giesen
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Patent number: 7101631Abstract: Disclosed is an electroluminescent device comprising a light-emitting layer containing a phosphorescent light emitting material that contains an organometallic complex comprising a metal selected from the group consisting of Ir, Rh, Os, Pt, and Pd and a pyrazole compound fused with at least one aromatic ring. The device provides useful light emissions.Type: GrantFiled: December 5, 2003Date of Patent: September 5, 2006Assignee: Eastman Kodak CompanyInventors: Joseph C. Deaton, Zbyslaw R. Owczarczyk, David J. Giesen
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Patent number: 7090930Abstract: Disclosed is a useful electroluminescent device comprising a cathode, an anode, and therebetween a light emitting layer containing a host material and a phosphorescent light-emitting material wherein the host material is represented by formula (1): X?-A-X???(1) wherein: A is selected from the group consisting of an unsubstituted phenylene ring, a biphenylene group, a terphenylene group, a naphthylene group, and a fluorene group; and each of X? and X? is an independently selected aromatic group bearing an ortho aromatic substituent.Type: GrantFiled: December 5, 2003Date of Patent: August 15, 2006Assignee: Eastman Kodak CompanyInventors: Douglas R. Robello, Joseph C. Deaton, David J. Giesen, Christopher T. Brown, Jianmin Shi
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Patent number: 7083865Abstract: Disclosed is an OLED device comprising a light-emitting layer (LEL) containing a host and a dopant located between a cathode and an anode wherein the emitter is an orange-red light emitting rubrene derivative represented by formula (I): wherein: a) there are identical aromatic groups at the 2- and 8-positions; b) the phenyl rings in the 5- and 11-positions contain only para-substituents identical to the aromatic groups in paragraph a); and c) the phenyl rings in the 6- and 12-positions are substituted or not.Type: GrantFiled: November 4, 2003Date of Patent: August 1, 2006Assignee: Eastman Kodak CompanyInventors: William J. Begley, Tukaram K. Hatwar, Manju Rajeswaran, David J. Giesen, Natasha Andrievsky
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Patent number: 7052785Abstract: Disclosed is an OLED device comprising a light-emitting layer (LEL) containing a host and a dopant located between a cathode and an anode wherein the emitter is an orange-red light emitting rubrene derivative represented by formula (II): wherein: a) there are identical branched alkyl or non-aromatic carbocyclic groups at the 2- and 8-positions; b) the phenyl rings in the 5- and 11-positions contain only para-substituents identical to the branched alkyl or non-aromatic carbocyclic groups in paragraph a); and c) the phenyl rings in the 6- and 12-positions are substituted.Type: GrantFiled: November 4, 2003Date of Patent: May 30, 2006Assignee: Eastman Kodak CompanyInventors: William J. Begley, Tukaram K. Hatwar, Manju Rajeswaran, David J. Giesen, Natasha Andrievsky
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Patent number: 7049012Abstract: Disclosed is an OLED device comprising a light-emitting layer (LEL) containing a host and a dopant located between a cathode and an anode wherein the emitter is an orange-red light emitting rubrene derivative represented by formula (I): wherein: a) there are identical oxy, aza or thio groups at the 2- and 8-positions; b) the phenyl rings in the 5- and 11-positions contain only para-substituents identical to the oxy, aza or thio groups in paragraph a); c) the phenyl rings in the 6- and 12-positions are substituted; and provided that when a single substituent on both phenyl rings in paragraph c) are present, said substituent is not a methoxy group located at the para-position.Type: GrantFiled: November 4, 2003Date of Patent: May 23, 2006Assignee: Eastman Kodak CompanyInventors: William J. Begley, Tukaram K. Hatwar, Manju Rajeswaran, David J. Giesen, Natasha Andrievsky