Patents by Inventor Min-Hao Michael Lu
Min-Hao Michael Lu 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: 20100244725Abstract: An organic light emitting device comprising, an anode, a cathode, and an emissive layer, located between the anode and the cathode, of a host compound, a first compound capable of phosphorescent emission at room temperature, and a second compound capable of phosphorescent emission at room temperature is provided. At least 95 percent of emission from the device is produced from the second compound when an appropriate voltage is applied across the anode and cathode.Type: ApplicationFiled: April 19, 2007Publication date: September 30, 2010Applicant: UNIVERSAL DISPLAY CORPORATIONInventors: Vadim Adamovich, Michael S. Weaver, Min-Hao Michael Lu
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Patent number: 7663300Abstract: An organic light emitting device is provided. The device has a plurality of regions, each region having an organic emissive layer adapted to emit a different spectrum of light. The regions in combination emit light suitable for illumination purposes. The area of each region may be selected such that the device is more efficient that an otherwise equivalent device having regions of equal size. The regions may have an aspect ratio of at least about four. All parts of any given region may be driven at the same current.Type: GrantFiled: August 16, 2002Date of Patent: February 16, 2010Assignee: Universal Display CorporationInventors: Michael Hack, Min-Hao Michael Lu, Michael S. Weaver
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Patent number: 7285432Abstract: A method of fabricating an organic light emitting device is provided. A first organic layer is deposited over a first electrode. A second organic layer comprising a small molecule organic material is then deposited using solution processing over and in physical contact with the first organic layer, such that the first organic layer is insoluble in the solution used to deposit the second organic layer. A second electrode is then deposited over the second organic layer.Type: GrantFiled: October 12, 2005Date of Patent: October 23, 2007Assignee: Universal Display CorporationInventors: Raymond Kwong, Min-Hao Michael Lu
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Patent number: 7071615Abstract: A cathode adapted for use in an organic optoelectronic device is provided. The cathode has an electron injection layer, an organic buffer layer, a conducting layer, and a transparent conductive oxide layer disposed, in that order, over the organic operative layers of the optoelectronic device. A method of fabricating the cathode is also provided.Type: GrantFiled: August 20, 2001Date of Patent: July 4, 2006Assignee: Universal Display CorporationInventors: Min-Hao Michael Lu, Michael S. Weaver
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Patent number: 7061175Abstract: An organic light emitting device is provided. The device includes an anode, an organic layer disposed over the anode, a layer comprising an alkaline metal compound disposed over the organic layer, a layer comprising Mg or a Mg-metal alloy disposed over the layer comprising an alkaline metal compound, and a layer comprising a transparent conductive metal oxide disposed over the layer comprising Mg or Mg-metal alloy. A method of fabricating an organic light emitting device is also provided. An organic layer is deposited over an anode. An electron injection enhancement layer consisting essentially of an alkaline metal compound is deposited over the organic layer. A transparent cathode, including a layer of Mg or Mg-metal alloy and a layer of metal oxide, is deposited over the layer of alkaline metal compound. A device fabricated by this process is also provided.Type: GrantFiled: August 16, 2002Date of Patent: June 13, 2006Assignee: Universal Display CorporationInventors: Michael S. Weaver, Min-Hao Michael Lu, Theodore Zhou
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Patent number: 7053547Abstract: A device is provided. The device includes a substrate, a first electrode disposed over the substrate, a small molecule organic emissive layer disposed over the first electrode, and a second electrode disposed over the organic emissive layer. The substrate has a first index of refraction, and the organic emissive layer has a second index of refraction. The first index of refraction is higher than the second index of refraction. The device may have an external electroluminescent efficiency of at least about 56%. Bulky substituents or dopants may be used to decrease the index of refraction and/or the density of the organic emissive layer.Type: GrantFiled: November 27, 2002Date of Patent: May 30, 2006Assignees: Universal Display Corporation, The Trustees of Princeton UniversityInventors: Min-Hao Michael Lu, James C. Sturm, Conor Francis Madigan, Raymond Kwong
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Patent number: 7049636Abstract: A device and corresponding method are provided. The device includes an n-type transistor fabricated over a substrate, the n-type transistor having a gate and two current-carrying electrodes. The device also includes a non-inverted organic light emitting device fabricated over the substrate, the non-inverted organic light emitting device having an anode and a cathode. The cathode is connected to one of the current-carrying electrodes of the n-type transistor.Type: GrantFiled: October 28, 2002Date of Patent: May 23, 2006Assignee: Universal Display CorporationInventors: Michael S. Weaver, Michael Hack, Min-Hao Michael Lu
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Patent number: 7012363Abstract: OLED devices are disclosed having increased external electroluminescence quantum efficiencies, i.e., increased “out-coupling” efficiencies. OLED devices that have increased out-coupling efficiencies and that are also protected from environmental elements such as moisture and oxygen are also disclosed. The OLED device of the present invention comprises a substrate; an active region positioned on the substrate, wherein the active region comprises an anode layer, a cathode layer and a light-emitting layer disposed between the anode layer and the cathode layer; and a polymeric layer disposed (a) over the active region, (b) under the active region or (c) both over and under the active region. The polymeric layer has microparticles incorporated therein, and the microparticles are effective to increase the out-coupling efficiency of the OLED.Type: GrantFiled: January 10, 2002Date of Patent: March 14, 2006Assignee: Universal Display CorporationInventors: Michael Stuart Weaver, Vladimir Bulovic, Min-Hao Michael Lu
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Patent number: 6982179Abstract: A method of fabricating an organic light emitting device is provided. A first organic layer is deposited over a first electrode. A second organic layer comprising a small molecule organic material is then deposited using solution processing over and in physical contact with the first organic layer, such that the first organic layer is insoluble in the solution used to deposit the second organic layer. A second electrode is then deposited over the second organic layer.Type: GrantFiled: November 15, 2002Date of Patent: January 3, 2006Assignee: University Display CorporationInventors: Raymond Kwong, Min-Hao Michael Lu
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Patent number: 6902833Abstract: A device is provided, having an anode, a cathode, and a first organic layer disposed between the anode and the cathode. The first organic layer is capable of phosphorescent emissive when a voltage is applied between the anode and the cathode. A second organic layer disposed between the first organic layer and the cathode is also provided. The second organic layer is in direct contact with the first organic layer. The second organic layer may comprise a material having the structure: M may be selected from the group Ti, Zr, Hf, Nb, Re, Sn and Ge. The substituents R1 through R10 may be selected from the group consisting of alkyl and aryl groups. Each of R1 through R10 may represent no substitution, mono-, di-, or tri-substitution. The second organic layer may comprise a material having a dipole moment less than about 2.Type: GrantFiled: April 1, 2003Date of Patent: June 7, 2005Assignees: University of Southern California, Universal Display CorporationInventors: Mark E. Thompson, Simona Garon, Raymond Kwong, Jason Brooks, Min-Hao Michael Lu
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Patent number: 6900458Abstract: A device is provided. The device has a first electrode comprising a reflective material, and a second electrode disposed over the first electrode, the second electrode comprising a transmissive material. An organic layer including an emissive material is disposed between the first electrode and the second electrode. A light modulating element is disposed over the second electrode. In one embodiment, the first electrode is the only significantly reflective layer in the device. In another embodiment, the first and second electrodes and the organic layer are fabricated over the light modulating element, and the second electrode is reflective, not the first electrode. Color filters may be used to achieve a full-color display. Organic light emitting devices may be used that emit a broad spectra of light, such as white light. Organic light emitting devices that emit a single color of light may be used. Different organic light emitting devices that emit different spectra of light may be used.Type: GrantFiled: February 21, 2003Date of Patent: May 31, 2005Assignee: Universal Display CorporationInventors: Yeh-Jiun Tung, Min-Hao Michael Lu, Vladimir Bulovic
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Patent number: 6897474Abstract: An organic electronic device structure and a method of making the same. According to a first aspect of the invention, an organic electronic device structure is provided, which comprises: (a) a substrate layer; (b) an organic electronic region disposed over the substrate layer; (c) an adhesive layer disposed over the organic electronic device; and (d) a barrier layer disposed over the adhesive layer. According to a second aspect of the present invention, an organic electronic device structure is provided, which comprises: (a) a substrate layer; (b) an organic electronic region disposed over the substrate layer; (c) a barrier layer disposed over the organic electronic region; (d) an adhesive layer disposed over the substrate layer and over the barrier layer; and (e) an additional layer disposed over the adhesive layer. According to yet another aspect of the invention, a method for providing an organic electronic device structure of provided.Type: GrantFiled: April 4, 2003Date of Patent: May 24, 2005Assignee: Universal Display CorporationInventors: Julia J. Brown, Michael Stuart Weaver, Min-Hao Michael Lu
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Patent number: 6891326Abstract: An organic light emitting device that may have mixed organic layers is provided. A method of fabricating such an organic light emitting device is provided. A first organic material is solution deposited to form a patterned organic layer over a first electrode. A second organic material is deposited, by means other than solution processing, on and in physical contact with the first organic layer to form a second organic layer. The second organic layer forms a blanket layer over the first organic layer. A second electrode is then deposited over the second organic layer.Type: GrantFiled: November 15, 2002Date of Patent: May 10, 2005Assignee: Universal Display CorporationInventor: Min-Hao Michael Lu
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Publication number: 20040197601Abstract: A device is provided, having an anode, a cathode, and a first organic layer disposed between the anode and the cathode. The first organic layer is capable of phosphorescent emissive when a voltage is applied between the anode and the cathode. A second organic layer disposed between the first organic layer and the cathode is also provided. The second organic layer is in direct contact with the first organic layer.Type: ApplicationFiled: April 1, 2003Publication date: October 7, 2004Inventors: Mark E. Thompson, Simona Garon, Raymond Kwong, Jason Brooks, Min-Hao Michael Lu
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Publication number: 20040174116Abstract: A cathode adapted for use in an organic optoelectronic device is provided. The cathode has an electron injection layer, an organic buffer layer, a conducting layer, and a transparent conductive oxide layer disposed, in that order, over the organic operative layers of the optoelectronic device. A method of fabricating the cathode is also provided.Type: ApplicationFiled: August 20, 2001Publication date: September 9, 2004Inventors: Min-Hao Michael Lu, Michael S. Weaver
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Patent number: 6784016Abstract: The present invention relates to an organic light emitting device (OLED) for producing electroluminescence having, in order, for example, an anode, a hole transporting layer (HTL), a blocking layer, an electron transporting layer (ETL), and a cathode. In the devices of the present invention, the hole transporting layer comprises a polymeric material, which material may be emissive or may be doped with an emissive dopant. The blocking layer and the electron transporting layer are small-molecule materials. The presence of a blocking layer confines the emission of light to the polymer layer, which may be a HTL or a separate emitting layer (EL). The devices of the present invention are suitable for use in single color, multi-color and full-color, passive or active matrix OLED displays.Type: GrantFiled: June 21, 2002Date of Patent: August 31, 2004Assignee: The Trustees of Princeton UniversityInventors: Ke Long, James C. Sturm, Min-Hao Michael Lu
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Publication number: 20040164292Abstract: A device is provided. The device has a first electrode comprising a reflective material, and a second electrode disposed over the first electrode, the second electrode comprising a transmissive material. An organic layer including an emissive material is disposed between the first electrode and the second electrode. A light modulating element is disposed over the second electrode. In one embodiment, the first electrode is the only significantly reflective layer in the device. In another embodiment, the first and second electrodes and the organic layer are fabricated over the light modulating element, and the second electrode is reflective, not the first electrode. Color filters may be used to achieve a full-color display. Organic light emitting devices may be used that emit a broad spectra of light, such as white light. Organic light emitting devices that emit a single color of light may be used. Different organic light emitting devices that emit different spectra of light may be used.Type: ApplicationFiled: February 21, 2003Publication date: August 26, 2004Inventors: Yeh-Jiun Tung, Min-Hao Michael Lu, Vladimir Bulovic
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Publication number: 20040096570Abstract: Methods of fabricating organic devices that may have mixed small molecule organic layers are provided. A method of fabricating an organic light emitting device is provided. A first small molecule organic material is deposited to form an organic layer over a first electrode. A second small molecule organic material is solution deposited on and in physical contact with the first small molecule organic layer to form a second organic layer. Mixing of the first and second organic layers may occur. A second electrode is then deposited over the second small molecule organic layer. Another method of fabricating an organic light emitting device is also provided. A mixture of a first small molecule organic material and a second small molecule organic material are solution deposited over a first electrode, such that the first and second small molecule organic materials at least partially separate into first and second small molecule organic layers.Type: ApplicationFiled: November 15, 2002Publication date: May 20, 2004Inventors: Michael Weaver, Julie Brown, Raymond Kwong, Min-Hao Michael Lu
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Publication number: 20040097101Abstract: A method of fabricating an organic light emitting device is provided. A first organic layer is deposited over a first electrode. A second organic layer comprising a small molecule organic material is then deposited using solution processing over and in physical contact with the first organic layer, such that the first organic layer is insoluble in the solution used to deposit the second organic layer. A second electrode is then deposited over the second organic layer.Type: ApplicationFiled: November 15, 2002Publication date: May 20, 2004Inventors: Raymond Kwong, Min-Hao Michael Lu
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Publication number: 20040095064Abstract: An organic light emitting device that may have mixed organic layers is provided. A method of fabricating such an organic light emitting device is provided. A first organic material is solution deposited to form a patterned organic layer over a first electrode. A second organic material is deposited, by means other than solution processing, on and in physical contact with the first organic layer to form a second organic layer. The second organic layer forms a blanket layer over the first organic layer. A second electrode is then deposited over the second organic layer.Type: ApplicationFiled: November 15, 2002Publication date: May 20, 2004Inventor: Min-Hao Michael Lu