Patents by Inventor Ha T. Le
Ha T. Le 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: 8692446Abstract: A light extraction film having nanoparticles with engineered periodic structures. The light extraction film includes a substantially transparent substrate, low index one-dimensional or two-dimensional periodic structures on the substrate, and a high index planarizing backfill layer applied over the periodic structures. Light scattering nanoparticles are either applied in a layer over the periodic structures or included in the backfill layer.Type: GrantFiled: March 17, 2011Date of Patent: April 8, 2014Assignee: 3M Innovative Properties CompanyInventors: Jun-Ying Zhang, Encai Hao, Vivian W. Jones, Terry L. Smith, Sergey A. Lamansky, Ha T. Le, Dawn Qiu, William B. Kolb, James M. Battiato, David B. Stegall
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Patent number: 8659221Abstract: A light extraction film having multi-periodic zones of engineered nanostructures. The light extraction film includes a flexible substrate, a layer of low index engineered nanostructures applied to the substrate, and a high index backfill layer applied over the nanostructures. The multi-periodic zones include a repeating zone of the nanostructures having multi-periodic characteristics. The repeating zone includes first and second sets of nanostructures having different periodic pitches. The multi-periodic zones can be used to enhance the light output and tune the angular luminosity of organic light emitting diode devices.Type: GrantFiled: August 26, 2011Date of Patent: February 25, 2014Assignee: 3M Innovative Properties CompanyInventors: Vivian W. Jones, Sergey A. Lamansky, James M. Nelson, Ha T. Le
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Patent number: 8538224Abstract: A light extraction film having internal nanostructures and external microstructures for organic light emitting diode (OLED) devices. The light extraction film includes a flexible substantially transparent film, a low index nanostructured layer applied to the film, and a high index planarizing backfill layer applied over the nanostructured layer. External optical microstructures are applied to the flexible substantially transparent film on a side opposite the nanostructured layer to enhance light extraction from the OLED devices while providing for a more uniform luminance distribution.Type: GrantFiled: April 22, 2010Date of Patent: September 17, 2013Assignee: 3M Innovative Properties CompanyInventors: Sergey A. Lamansky, Terry L. Smith, Jun-Ying Zhang, Leslie A. Todero, Encai Hao, Ha T. Le, Ding Wang, Fei Lu, Shoichi Masuda
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Patent number: 8427747Abstract: A light extraction film laminated to a glass substrate for organic light emitting diode (OLED) devices. The light extraction film includes a flexible substantially transparent film, a low index nanostructured layer applied to the film, and a high index planarizing backfill layer applied over the nanostructured layer. A glass substrate is laminated to the flexible substantially transparent film on a side opposite the nanostructured layer and including an ultra-low index region between the film and the glass substrate. The ultra-low index region is used to reduce optical losses occurring with the glass substrate.Type: GrantFiled: April 22, 2010Date of Patent: April 23, 2013Assignee: 3M Innovative Properties CompanyInventors: Ha T. Le, Jun-Ying Zhang, Sergey A. Lamansky, Scott M. Tapio, Encai Hao, David B. Stegall, Serena L. Mollenhauer
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Publication number: 20130051032Abstract: A light extraction film having multi-periodic zones of engineered nanostructures. The light extraction film includes a flexible substrate, a layer of low index engineered nanostructures applied to the substrate, and a high index backfill layer applied over the nanostructures. The multi-periodic zones include a repeating zone of the nanostructures having multi-periodic characteristics. The repeating zone includes first and second sets of nanostructures having different periodic pitches. The multi-periodic zones can be used to enhance the light output and tune the angular luminosity of organic light emitting diode devices.Type: ApplicationFiled: August 26, 2011Publication date: February 28, 2013Inventors: Vivian W. Jones, Sergey A. Lamansky, James M. Nelson, Ha T. Le
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Publication number: 20120234460Abstract: A light extraction film having nanoparticles with engineered periodic structures. The light extraction film includes a substantially transparent substrate, low index one-dimensional or two-dimensional periodic structures on the substrate, and a high index planarizing backfill layer applied over the periodic structures. Light scattering nanoparticles are either applied in a layer over the periodic structures or included in the backfill layer.Type: ApplicationFiled: March 17, 2011Publication date: September 20, 2012Inventors: Jun-Ying Zhang, Encai Hao, Vivian W. Jones, Terry L. Smith, Sergey A. Lamansky, Ha T. Le, Dawn Qiu, William B. Kolb, James M. Battiato, David B. Stegall
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Publication number: 20110262093Abstract: A light extraction film having internal nanostructures and external microstructures for organic light emitting diode (OLED) devices. The light extraction film includes a flexible substantially transparent film, a low index nanostructured layer applied to the film, and a high index planarizing backfill layer applied over the nanostructured layer. External optical microstructures are applied to the flexible substantially transparent film on a side opposite the nanostructured layer to enhance light extraction from the OLED devices while providing for a more uniform luminance distribution.Type: ApplicationFiled: April 22, 2010Publication date: October 27, 2011Inventors: Sergey A. Lamansky, Terry L. Smith, Jun-Ying Zhang, Leslie A. Todero, Encai Hao, Ha T. Le, Ding Wang, Fei Lu, Shoichi Masuda
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Publication number: 20110261461Abstract: A light extraction film laminated to a glass substrate for organic light emitting diode (OLED) devices. The light extraction film includes a flexible substantially transparent film, a low index nanostructured layer applied to the film, and a high index planarizing backfill layer applied over the nanostructured layer. A glass substrate is laminated to the flexible substantially transparent film on a side opposite the nanostructured layer and including an ultra-low index region between the film and the glass substrate. The ultra-low index region is used to reduce optical losses occurring with the glass substrate.Type: ApplicationFiled: April 22, 2010Publication date: October 27, 2011Inventors: Ha T. Le, Jun-Ying Zhang, Sergey A. Lamansky, Scott M. Tapio, Encai Hao, David B. Stegall, Serena L. Mollenhauer
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Publication number: 20100110551Abstract: A multifunctional optical film for enhancing light extraction includes a flexible substrate, a structured layer, a high index backfill layer, and an optional passivation layer. The structured layer effectively uses microreplicated diffractive or scattering nanostructures located near enough to the light generation region to enable extraction of an evanescent wave from an organic light emitting diode (OLED) device. The backfill layer has a material having an index of refraction different from the index of refraction of the structured layer. The backfill layer also provides a planarizing layer over the structured layer in order to conform the light extraction film to a layer of an OLED display device. The film may have additional layers added to or incorporated within it to an emissive surface in order to effect additional functionalities beyond improvement of light extraction efficiency.Type: ApplicationFiled: October 31, 2008Publication date: May 6, 2010Inventors: Sergey A. Lamansky, Encai Hao, Ha T. Le, David B. Stegall, Ding Wang, Yi Lu, Terry L. Smith, Jun-Ying Zhang, Jung-Sheng Wu, James E. Thorson
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Patent number: 7670450Abstract: A thermal transfer donor element is provided which can include a support, light-to-heat conversion layer, interlayer, and transfer layer. When the donor element is brought into contact with a receptor and imagewise irradiated, an image is obtained which is free from contamination by the light-to-heat conversion layer. In order to enhance the lifetimes of the transferred material, thermal treatments such as annealing are applied to the receptor before transfer, to the transfer layer after transfer, or a combination of them. The construction and process of the donor element is useful in making colored images including applications such as color proofs, color filter elements, and organic light emitting diode displays and devices.Type: GrantFiled: July 31, 2006Date of Patent: March 2, 2010Assignee: 3M Innovative Properties CompanyInventors: Sergey A. Lamansky, Erika Bellmann, Ha T. Le, John S. Staral, John P. Baetzold
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Patent number: 7534543Abstract: A thermal transfer donor element is provided which includes a support, light-to-heat conversion layer, interlayer, and thermal transfer layer. When the donor element is brought into contact with a receptor and imagewise irradiated, a portion of the transfer layer is transferred to the receptor. The relative surface texture of the layers can be at least partially controlled, prior to imaging of the donor element, for desired effects in the resulting receptor device. The construction and process of the donor element is useful in making colored images including applications such as color proofs, color filter elements, and organic light emitting displays.Type: GrantFiled: August 2, 2005Date of Patent: May 19, 2009Assignee: 3M Innovative Properties CompanyInventors: Leslie A. Kreilich, Vivian W. Jones, Khanh T. Huynh, John S. Staral, Sergey A. Lamansky, Ha T. Le, John P. Baetzold
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Publication number: 20080026306Abstract: A thermal transfer donor element is provided which can include a support, light-to-heat conversion layer, interlayer, and transfer layer. When the donor element is brought into contact with a receptor and imagewise irradiated, an image is obtained which is free from contamination by the light-to-heat conversion layer. In order to enhance the lifetimes of the transferred material, thermal treatments such as annealing are applied to the receptor before transfer, to the transfer layer after transfer, or a combination of them. The construction and process of the donor element is useful in making colored images including applications such as color proofs, color filter elements, and organic light emitting diode displays and devices.Type: ApplicationFiled: July 31, 2006Publication date: January 31, 2008Inventors: Sergey A. Lamansky, Erika Bellmann, Ha T. Le, John S. Staral, John P. Baetzold
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Patent number: 6855636Abstract: The present invention provides a process for selectively thermally transferring insulators onto organic electroluminescent stacks or layers to electronically isolate adjacent devices upon deposition of electrode material. This can allow the formation of top electrodes for a plurality of organic electroluminescent devices on a substrate via one deposition step to form a single common top electrode or a plurality of electrodes patterned by shadowing due to the presence of the insulators.Type: GrantFiled: October 31, 2002Date of Patent: February 15, 2005Assignee: 3M Innovative Properties CompanyInventors: Steven D. Theiss, Ha T. Le, William A. Tolbert, Martin B. Wolk, Paul F. Baude
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Patent number: 6855384Abstract: The present invention provides a selectively thermally transferable blend capable of forming the emissive layer of an organic electroluminescent device. The blend includes a light emitting polymer and an additive selected to promote selective thermal transfer of the blend from a donor element to a proximately located receptor substrate.Type: GrantFiled: September 15, 2000Date of Patent: February 15, 2005Assignee: 3M Innovative Properties CompanyInventors: Manoj Nirmal, Ha T. Le, Martin B. Wolk, Erika Bellmann, Fred McCormick
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Publication number: 20040087165Abstract: The present invention provides a process for selectively thermally transferring insulators onto organic electroluminescent stacks or layers to electronically isolate adjacent devices upon deposition of electrode material. This can allow the formation of top electrodes for a plurality of organic electroluminescent devices on a substrate via one deposition step to form a single common top electrode or a plurality of electrodes patterned by shadowing due to the presence of the insulators.Type: ApplicationFiled: October 31, 2002Publication date: May 6, 2004Applicant: 3M Innovative Properties CompanyInventors: Steven D. Theiss, Ha T. Le, William A. Tolbert, Martin B. Wolk, Paul F. Baude
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Patent number: 6667143Abstract: The present invention provides an active primer that includes an electronically active material dispersed in a binder. The active primer can be disposed between a thermal transfer donor sheet and a receptor to assist selective thermal transfer of a material from the donor sheet to the receptor to form at least a portion of an electronic device on the receptor. The binder of the active primer can be selected to improve adhesion of the transferred material to the receptor, or to enhance other transfer properties. The electronically active material of the active primer can be selected to maintain a desired level of functionality in the electronic device being patterned on the receptor.Type: GrantFiled: October 8, 2002Date of Patent: December 23, 2003Assignee: 3M Innovative Properties CompanyInventors: Manoj Nirmal, Ha T. Le, Martin B. Wolk, Erika Bellmann, Fred McCormick
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Publication number: 20030049560Abstract: The present invention provides an active primer that includes an electronically active material dispersed in a binder. The active primer can be disposed between a thermal transfer donor sheet and a receptor to assist selective thermal transfer of a material from the donor sheet to the receptor to form at least a portion of an electronic device on the receptor. The binder of the active primer can be selected to improve adhesion of the transferred material to the receptor, or to enhance other transfer properties. The electronically active material of the active primer can be selected to maintain a desired level of functionality in the electronic device being patterned on the receptor.Type: ApplicationFiled: October 8, 2002Publication date: March 13, 2003Applicant: 3m Innovative Properties CompanyInventors: Manoj Nirmal, Ha T. Le, Martin B. Wolk, Erika Bellmann, Fred McCormick
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Patent number: 6482564Abstract: The present invention provides an active primer that includes an electronically active material dispersed in a binder. The active primer can be disposed between a thermal transfer donor sheet and a receptor to assist selective thermal transfer of a material from the donor sheet to the receptor to form at least a portion of an electronic device on the receptor. The binder of the active primer can be selected to improve adhesion of the transferred material to the receptor, or to enhance other transfer properties. The electronically active material of the active primer can be selected to maintain a desired level of functionality in the electronic device being patterned on the receptor.Type: GrantFiled: January 11, 2002Date of Patent: November 19, 2002Assignee: 3M Innovative Properties CompanyInventors: Manoj Nirmal, Ha T. Le, Martin B. Wolk, Erika Bellmann, Fred McCormick
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Publication number: 20020086232Abstract: The present invention provides an active primer that includes an electronically active material dispersed in a binder. The active primer can be disposed between a thermal transfer donor sheet and a receptor to assist selective thermal transfer of a material from the donor sheet to the receptor to form at least a portion of an electronic device on the receptor. The binder of the active primer can be selected to improve adhesion of the transferred material to the receptor, or to enhance other transfer properties. The electronically active material of the active primer can be selected to maintain a desired level of functionality in the electronic device being patterned on the receptor.Type: ApplicationFiled: January 11, 2002Publication date: July 4, 2002Applicant: 3M Innovative Properties CompanyInventors: Manoj Nirmal, Ha T. Le, Martin B. Wolk, Erika Bellmann, Fred McCormick
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Patent number: 6358664Abstract: The present invention provides an active primer that includes an electronically active material dispersed in a binder. The active primer can be disposed between a thermal transfer donor sheet and a receptor to assist selective thermal transfer of a material from the donor sheet to the receptor to form at least a portion of an electronic device on the receptor. The binder of the active primer can be selected to improve adhesion of the transferred material to the receptor, or to enhance other transfer properties. The electronically active material of the active primer can be selected to maintain a desired level of functionality in the electronic device being patterned on the receptor.Type: GrantFiled: September 15, 2000Date of Patent: March 19, 2002Assignee: 3M Innovative Properties CompanyInventors: Manoj Nirmal, Ha T. Le, Martin B. Wolk, Erika Bellmann, Fred McCormick