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).

  • Patent number: 10886503
    Abstract: 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: Grant
    Filed: October 16, 2019
    Date of Patent: January 5, 2021
    Assignees: Universal Display Corporation, Kent State University
    Inventors: Yue Cui, Deng-ke Yang, Ruiqing Ma, Gregory McGraw, Julia J. Brown
  • Patent number: 10871694
    Abstract: 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: Grant
    Filed: September 11, 2017
    Date of Patent: December 22, 2020
    Assignee: Kent State University
    Inventors: Deng-Ke Yang, Meina Yu
  • Publication number: 20200119312
    Abstract: 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: Application
    Filed: October 16, 2019
    Publication date: April 16, 2020
    Inventors: Yue CUI, Deng-ke YANG, Ruiqing Ma, Gregory McGraw, Julia J. Brown
  • Publication number: 20190361272
    Abstract: 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: Application
    Filed: September 11, 2017
    Publication date: November 28, 2019
    Applicants: Kent State University, BOE Technology Group Co., Ltd.
    Inventors: Deng-Ke Yang, Xiaochen Zhou, Guangkui Qin
  • Publication number: 20190361284
    Abstract: 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: Application
    Filed: September 11, 2017
    Publication date: November 28, 2019
    Applicant: Kent State University
    Inventors: Deng-Ke Yang, Meina Yu
  • Patent number: 10468633
    Abstract: 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: Grant
    Filed: May 22, 2014
    Date of Patent: November 5, 2019
    Assignees: Universal Display Corporation, Kent State University
    Inventors: Yue Cui, Deng-ke Yang, Ruiqing Ma, Gregory McGraw, Julia J. Brown
  • Patent number: 10175525
    Abstract: 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: Grant
    Filed: June 12, 2015
    Date of Patent: January 8, 2019
    Assignee: The University of Akron
    Inventors: Deng-Ke Yang, Alireza Moheghi, Hossein Nemati
  • Patent number: 10115930
    Abstract: 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: Grant
    Filed: July 8, 2014
    Date of Patent: October 30, 2018
    Assignees: Universal Display Corporation, Kent State University
    Inventors: Yue Cui, Deng-ke Yang, Gregory McGraw, Ruiqing Ma, Julia J. Brown
  • Patent number: 9835894
    Abstract: 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: Grant
    Filed: March 9, 2016
    Date of Patent: December 5, 2017
    Assignee: Kent State University
    Inventors: Deng-Ke Yang, Yue Cui, Cuiyu Zhang
  • Publication number: 20160187681
    Abstract: 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: Application
    Filed: March 9, 2016
    Publication date: June 30, 2016
    Applicant: Kent State University
    Inventors: Deng-Ke Yang, Yue Cui, Cuiyu Zhang
  • Patent number: 9304350
    Abstract: 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: Grant
    Filed: June 3, 2013
    Date of Patent: April 5, 2016
    Assignee: Kent State University
    Inventors: Deng-Ke Yang, Yue Cui, Cuiyu Zhang
  • Publication number: 20160013449
    Abstract: 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: Application
    Filed: July 8, 2014
    Publication date: January 14, 2016
    Inventors: Yue CUI, Deng-ke YANG, Gregory McGraw, Ruiqing Ma, Julia J. Brown
  • Publication number: 20150362649
    Abstract: 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: Application
    Filed: June 12, 2015
    Publication date: December 17, 2015
    Inventors: Deng-Ke Yang, Alireza Moheghi, Hossein Nemati
  • Patent number: 8913215
    Abstract: 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: Grant
    Filed: March 24, 2009
    Date of Patent: December 16, 2014
    Assignee: Kent State University
    Inventors: Deng-Ke Yang, Lei Shi, Rui Bao
  • Publication number: 20140361270
    Abstract: 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: Application
    Filed: May 22, 2014
    Publication date: December 11, 2014
    Applicants: Universal Display Corporation, Kent State University
    Inventors: Yue CUI, Deng-ke YANG, Ruiqing Ma, Gregory McGraw, Julia J. Brown
  • Publication number: 20140160399
    Abstract: 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: Application
    Filed: June 3, 2013
    Publication date: June 12, 2014
    Inventors: Deng-Ke Yang, Yue Cui, Cuiyu Zhang
  • Patent number: 8537326
    Abstract: The invention provides a liquid crystal (LC) composition, a LC device such as a liquid crystal display and a phase modulator, and a method thereof. The liquid crystal composition comprises a liquid crystal and a polymer. The liquid crystal exhibits a macroscopic anisotropic property such as optical property in the absence of the polymer under a condition such as certain temperature. The polymer in the composition stabilizes the liquid crystal so that the liquid crystal exhibits a macroscopic isotropic property under the same condition, and the liquid crystal stabilized by the polymer exhibits the macroscopic anisotropic property when an electrical field is applied thereon. The devices exhibit technical merits such as large viewing angle, fast response time, better contrast ratio, easy manufacturability of large size display with improved dark state, easy manufacturing process with wider temperature region, and polarization-insensitivity of PSI phase modulator, among others.
    Type: Grant
    Filed: May 13, 2010
    Date of Patent: September 17, 2013
    Assignee: Kent State University
    Inventors: Deng-Ke Yang, Young Cheol Yang, Rui Bao
  • Publication number: 20120194498
    Abstract: A bi-stable active matrix (AM) display apparatus and a method for driving a display panel thereof are provided. The bi-stable AM display apparatus includes a bi-stable AM display panel, a scan driver, a data driver and a controller. A frame period is divided into a resetting phase and a determining phase. The controller resets pixels on a plurality of scan lines of the bi-stable AM display panel to a homotropic state in the resetting phase through the scan driver and the data driver. The controller writes frame information into the pixels on the scan lines in the determining phase through the scan driver and the data driver.
    Type: Application
    Filed: July 15, 2011
    Publication date: August 2, 2012
    Applicants: KENT STATE UNIVERSITY, INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Deng-Ke Yang, Heng-Yin Chen, Young-Cheol Yang, Rafael S. Zola, Chao-Chiun Liang, Chih-Jen Chen
  • Patent number: 8199286
    Abstract: A transreflective display in which the thickness of the liquid crystal layer is the same for both transmissive and reflective modes. The transmissive and reflective pixels are stabilized in two different liquid crystal configurations with different birefringences. The light retardation effect of one path in the transmissive pixels is close to or equals the retardation effect of two paths in the reflective pixels, resulting in synchronization of the two modes.
    Type: Grant
    Filed: July 29, 2005
    Date of Patent: June 12, 2012
    Assignee: Kent State University
    Inventors: Deng-Ke Yang, Fushan Zhou
  • Publication number: 20100289999
    Abstract: The invention provides a liquid crystal (LC) composition, a LC device such as a liquid crystal display and a phase modulator, and a method thereof. The liquid crystal composition comprises a liquid crystal and a polymer. The liquid crystal exhibits a macroscopic anisotropic property such as optical property in the absence of the polymer under a condition such as certain temperature. The polymer in the composition stabilizes the liquid crystal so that the liquid crystal exhibits a macroscopic isotropic property under the same condition, and the liquid crystal stabilized by the polymer exhibits the macroscopic anisotropic property when an electrical field is applied thereon. The devices exhibit technical merits such as large viewing angle, fast response time, better contrast ratio, easy manufacturability of large size display with improved dark state, easy manufacturing process with wider temperature region, and polarization-insensitivity of PSI phase modulator, among others.
    Type: Application
    Filed: May 13, 2010
    Publication date: November 18, 2010
    Inventors: Deng-Ke Yang, Young Cheol Yang, Rui Bao