Patents by Inventor Deng-Ke Yang
Deng-Ke Yang 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: 11906832Abstract: A dual side view display includes a waveguide with an inside transparent layer and an outside transparent layer spaced apart from and parallel to the inside transparent layer, and a plurality of inside view liquid crystal (LC) pixels and a plurality of outside view LC pixels disposed within the waveguide. The plurality of outside view LC pixels are disposed within the waveguide parallel to and in-plane with the plurality of inside view LC pixels. The plurality of inside LC pixels includes a plurality of outside blocking layers configured to block light scattered in the plurality of inside view LC pixels from propagating through the outside transparent layer. Also, the plurality of outside view LC pixels includes a plurality of inside blocking layers configured to block light scattered in the plurality of outside view LC pixels from propagating through the inside transparent layer.Type: GrantFiled: July 28, 2022Date of Patent: February 20, 2024Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., MIRISE Technology Corporation, Kent State UniversityInventors: Deng-Ke Yang, Yunho Shin, Guangkui Qin, Sean P. Rodrigues
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Publication number: 20240036372Abstract: A dual side view display includes a waveguide with an inside transparent layer and an outside transparent layer spaced apart from and parallel to the inside transparent layer, and a plurality of inside view liquid crystal (LC) pixels and a plurality of outside view LC pixels disposed within the waveguide. The plurality of outside view LC pixels are disposed within the waveguide parallel to and in-plane with the plurality of inside view LC pixels. The plurality of inside LC pixels includes a plurality of outside blocking layers configured to block light scattered in the plurality of inside view LC pixels from propagating through the outside transparent layer. Also, the plurality of outside view LC pixels includes a plurality of inside blocking layers configured to block light scattered in the plurality of outside view LC pixels from propagating through the inside transparent layer.Type: ApplicationFiled: July 28, 2022Publication date: February 1, 2024Applicants: Toyota Motor Engineering & Manufacturing North America, Inc., Toyota Jidosha Kabushiki Kaisha, Kent State University, BOE Technology Group Co. LTD.Inventors: Deng-Ke Yang, Yunho Shin, Guangkui Qin, Sean P. Rodrigues
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Publication number: 20230399889Abstract: A dual-mode switchable liquid-crystal window can control both radiant energy flow and privacy. The modes are selected by using different voltage frequencies. A dichroic dye is doped to enable modulation of transmission of the window. In the absence of an applied voltage, the window is transparent without haze. When a high-frequency (e.g., 1 kHz) voltage is applied, the liquid crystal and doped dye molecules inside the window reorient uniformly under dielectric interactions. The material becomes optically absorbing. The transmittance decreases, but the haze does not change. In this mode, the window can control radiant energy flow through the window. When a low-frequency (50 Hz) voltage is applied, the liquid crystal and doped dye molecules are switched into a micron-sized polydomain structure under flexoelectric interactions. The material becomes optically scattering and absorbing. The scenery behind the window is blocked. In this mode, privacy can be controlled.Type: ApplicationFiled: November 1, 2021Publication date: December 14, 2023Inventors: Yingfei JIANG, Deng-Ke YANG, Yunho SHIN
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Patent number: 11592694Abstract: A liquid crystal display is configured such that a composite layer thereof is transparent to incident light in one voltage condition (e.g., in the absence of an applied voltage) and scatters incident light out of the display in another voltage condition (e.g., when a voltage is applied). The liquid crystal display does not need polarizers or color filters.Type: GrantFiled: September 11, 2017Date of Patent: February 28, 2023Assignees: KENT STATE UNIVERSITY, BOE TECHNOLOGY GROUP CO., LTD.Inventors: Deng-Ke Yang, Xiaochen Zhou, Guangkui Qin
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Patent number: 10886503Abstract: Novel microlens array architectures for enhanced light outcoupling from light emission are provided. Organic light emitting devices (OLEDs) that include an outcoupling layer including these novel microlens array architectures and method for fabricating such OLEDs are provided. These devices may be used to provide OLEDs with optimized light extraction.Type: GrantFiled: October 16, 2019Date of Patent: January 5, 2021Assignees: Universal Display Corporation, Kent State UniversityInventors: Yue Cui, Deng-ke Yang, Ruiqing Ma, Gregory McGraw, Julia J. Brown
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Patent number: 10871694Abstract: A bistable cholesteric liquid crystal switchable window has two stable states in the absence of an applied voltage. A first stable state is a planar state which is transparent or reflective for visible light. A second stable state is a focal conic state which is opaque for visible light. The window can be switched from the first stable state to the second stable state via a first voltage pulse and from the second stable state to the first stable state via a second voltage pulse. The first voltage pulse and the second voltage pulse may have the same frequency.Type: GrantFiled: September 11, 2017Date of Patent: December 22, 2020Assignee: Kent State UniversityInventors: Deng-Ke Yang, Meina Yu
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Publication number: 20200119312Abstract: Novel microlens array architectures for enhanced light outcoupling from light emission are provided. Organic light emitting devices (OLEDs) that include an outcoupling layer including these novel microlens array architectures and method for fabricating such OLEDs are provided. These devices may be used to provide OLEDs with optimized light extraction.Type: ApplicationFiled: October 16, 2019Publication date: April 16, 2020Inventors: Yue CUI, Deng-ke YANG, Ruiqing Ma, Gregory McGraw, Julia J. Brown
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Publication number: 20190361284Abstract: A bistable cholesteric liquid crystal switchable window has two stable states in the absence of an applied voltage. A first stable state is a planar state which is transparent or reflective for visible light. A second stable state is a focal conic state which is opaque for visible light. The window can be switched from the first stable state to the second stable state via a first voltage pulse and from the second stable state to the first stable state via a second voltage pulse. The first voltage pulse and the second voltage pulse may have the same frequency.Type: ApplicationFiled: September 11, 2017Publication date: November 28, 2019Applicant: Kent State UniversityInventors: Deng-Ke Yang, Meina Yu
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Publication number: 20190361272Abstract: A liquid crystal display is configured such that a composite layer thereof is transparent to incident light in one voltage condition (e.g., in the absence of an applied voltage) and scatters incident light out of the display in another voltage condition (e.g., when a voltage is applied). The liquid crystal display does not need polarizers or color filters.Type: ApplicationFiled: September 11, 2017Publication date: November 28, 2019Applicants: Kent State University, BOE Technology Group Co., Ltd.Inventors: Deng-Ke Yang, Xiaochen Zhou, Guangkui Qin
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Patent number: 10468633Abstract: Novel microlens array architectures for enhanced light outcoupling from light emission are provided. Organic light emitting devices (OLEDs) that include an outcoupling layer including these novel microlens array architectures and method for fabricating such OLEDs are provided. These devices may be used to provide OLEDs with optimized light extraction.Type: GrantFiled: May 22, 2014Date of Patent: November 5, 2019Assignees: Universal Display Corporation, Kent State UniversityInventors: Yue Cui, Deng-ke Yang, Ruiqing Ma, Gregory McGraw, Julia J. Brown
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Patent number: 10175525Abstract: A polarizing waveguide plate includes a pair of spaced transparent plates that define a gap therebetween. Disposed within the gap is a composite material formed of a mixture of polymer mater and liquid crystal material. Positioned proximate to one edge of the gap is an edge light, while a reflector/converter is positioned proximate to another edge of the gap. During operation, unpolarized light is emitted from the edge light and is received within the gap. As such, a portion of the light polarized in a first direction is permitted to exit the waveguide, while the remaining portion of the light that is polarized in a second direction, orthogonal to the first direction, is converted by the converter/reflector so that its polarization is also in the first direction. As such, substantially all of the unpolarized light from the edge light is emitted by the polarizing waveguide plate as polarized light.Type: GrantFiled: June 12, 2015Date of Patent: January 8, 2019Assignee: The University of AkronInventors: Deng-Ke Yang, Alireza Moheghi, Hossein Nemati
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Patent number: 10115930Abstract: OLED structures including an internal extraction layer are provided. The internal extraction layer includes a material having a refractive index that is higher than the refractive index of a transparent electrode in the device, and a non-planar interface disposed between the material and the substrate. Devices are also provided that include an external extraction layer having a non-planar surface which, when used in conjunction with an internal extraction layer, provides greatly improved outcoupling of light generated by the device.Type: GrantFiled: July 8, 2014Date of Patent: October 30, 2018Assignees: Universal Display Corporation, Kent State UniversityInventors: Yue Cui, Deng-ke Yang, Gregory McGraw, Ruiqing Ma, Julia J. Brown
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Patent number: 9835894Abstract: An encapsulated polymer stabilized cholesteric texture (EPSCT) light shutter is formed from a cholesteric liquid crystal and monomer that is encapsulated into micron sized, polymer-coated droplets by either an emulsification or phase separation process. The polymer-coated droplets are disposed between transparent electrodes, where they are irradiated by ultra-violet (UV) light to polymerize the monomer.Type: GrantFiled: March 9, 2016Date of Patent: December 5, 2017Assignee: Kent State UniversityInventors: Deng-Ke Yang, Yue Cui, Cuiyu Zhang
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Publication number: 20160187681Abstract: An encapsulated polymer stabilized cholesteric texture (EPSCT) light shutter is formed from a cholesteric liquid crystal and monomer that is encapsulated into micron sized, polymer-coated droplets by either an emulsification or phase separation process. The polymer-coated droplets are disposed between transparent electrodes, where they are irradiated by ultra-violet (UV) light to polymerize the monomer.Type: ApplicationFiled: March 9, 2016Publication date: June 30, 2016Applicant: Kent State UniversityInventors: Deng-Ke Yang, Yue Cui, Cuiyu Zhang
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Patent number: 9304350Abstract: An encapsulated polymer stabilized cholesteric texture (EPSCT) light shutter is formed from a cholesteric liquid crystal and monomer that is encapsulated into micron sized, polymer-coated droplets by either an emulsification or phase separation process. The polymer-coated droplets are disposed between transparent electrodes, where they are irradiated by ultra-violet (UV) light to polymerize the monomer.Type: GrantFiled: June 3, 2013Date of Patent: April 5, 2016Assignee: Kent State UniversityInventors: Deng-Ke Yang, Yue Cui, Cuiyu Zhang
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Publication number: 20160013449Abstract: OLED structures including an internal extraction layer are provided. The internal extraction layer includes a material having a refractive index that is higher than the refractive index of a transparent electrode in the device, and a non-planar interface disposed between the material and the substrate. Devices are also provided that include an external extraction layer having a non-planar surface which, when used in conjunction with an internal extraction layer, provides greatly improved outcoupling of light generated by the device.Type: ApplicationFiled: July 8, 2014Publication date: January 14, 2016Inventors: Yue CUI, Deng-ke YANG, Gregory McGraw, Ruiqing Ma, Julia J. Brown
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Publication number: 20150362649Abstract: A polarizing waveguide plate includes a pair of spaced transparent plates that define a gap therebetween. Disposed within the gap is a composite material formed of a mixture of polymer mater and liquid crystal material. Positioned proximate to one edge of the gap is an edge light, while a reflector/converter is positioned proximate to another edge of the gap. During operation, unpolarized light is emitted from the edge light and is received within the gap. As such, a portion of the light polarized in a first direction is permitted to exit the waveguide, while the remaining portion of the light that is polarized in a second direction, orthogonal to the first direction, is converted by the converter/reflector so that its polarization is also in the first direction. As such, substantially all of the unpolarized light from the edge light is emitted by the polarizing waveguide plate as polarized light.Type: ApplicationFiled: June 12, 2015Publication date: December 17, 2015Inventors: Deng-Ke Yang, Alireza Moheghi, Hossein Nemati
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Patent number: 8913215Abstract: A bistable switchable liquid crystal device is provided in which the device can be switched between a transparent and an opaque state by a predetermined voltage pulse. The device is based on polymer stabilized cholesteric materials. No additional amount of voltage has to be applied to the device in order to sustain the optical states. Therefore, the device is energy-saving.Type: GrantFiled: March 24, 2009Date of Patent: December 16, 2014Assignee: Kent State UniversityInventors: Deng-Ke Yang, Lei Shi, Rui Bao
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Publication number: 20140361270Abstract: Novel microlens array architectures for enhanced light outcoupling from light emission are provided. Organic light emitting devices (OLEDs) that include an outcoupling layer including these novel microlens array architectures and method for fabricating such OLEDs are provided. These devices may be used to provide OLEDs with optimized light extraction.Type: ApplicationFiled: May 22, 2014Publication date: December 11, 2014Applicants: Universal Display Corporation, Kent State UniversityInventors: Yue CUI, Deng-ke YANG, Ruiqing Ma, Gregory McGraw, Julia J. Brown
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Publication number: 20140160399Abstract: An encapsulated polymer stabilized cholesteric texture (EPSCT) light shutter is formed from a cholesteric liquid crystal and monomer that is encapsulated into micron sized, polymer-coated droplets by either an emulsification or phase separation process. The polymer-coated droplets are disposed between transparent electrodes, where they are irradiated by ultra-violet (UV) light to polymerize the monomer.Type: ApplicationFiled: June 3, 2013Publication date: June 12, 2014Inventors: Deng-Ke Yang, Yue Cui, Cuiyu Zhang