Patents by Inventor VOLKMAR DIEROLF

VOLKMAR DIEROLF 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).

  • Publication number: 20210091268
    Abstract: A color tunable light emission diode in which the color tone of the emission color changes by controlling the injection current, which has an active layer sandwiched between a p-type layer and an n-type layer on a substrate, and the active color layer is formed by doping Eu and Mg to an AlGaInN-based material which is GaN, InN, AlN or a mixed crystal of any two or more of them; and a micro LED display, wherein its display unit is formed by integrating image pixels having the above color tunable light emission diode are provided; and a light emitting semiconductor device technology capable of providing an ultra-small and high definition micro LED display can be provided.
    Type: Application
    Filed: April 14, 2020
    Publication date: March 25, 2021
    Inventors: Volkmar Dierolf, Brandon Mitchell, Ruoqiao Wei, Yasufumi Fujiwara, Tomasz Gregorkiewicz, Shuhei Ichikawa, Jun Tatebayashi, Dolf Timmerman
  • Patent number: 10345626
    Abstract: In one aspect the invention provides a graded refractive index single crystal waveguide having a glass block containing at least one crystal core, the crystal core having a central portion extending along an axis from a first end to a second end; an interface defining a peripheral boundary of the crystal core at a junction of the crystal core and an adjacent portion of the glass block, and a continuous, radially symmetric misorientation transverse to the central portion; wherein the misorientation has a misorientation angle that increases with increasing distance from the central portion towards the interface.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: July 9, 2019
    Assignee: Lehigh University
    Inventors: Himanshu Jain, Volkmar Dierolf, Keith J. Veenhuizen
  • Patent number: 10324313
    Abstract: In one aspect the invention provides a graded refractive index single crystal waveguide having a glass block containing at least one crystal core, the crystal core having a central portion extending along an axis from a first end to a second end; an interface defining a peripheral boundary of the crystal core at a junction of the crystal core and an adjacent portion of the glass block, and a continuous, radially symmetric misorientation transverse to the central portion; wherein the misorientation has a misorientation angle that increases with increasing distance from the central portion towards the interface.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: June 18, 2019
    Assignee: LEHIGH UNIVERSITY
    Inventors: Himanshu Jain, Volkmar Dierolf, Keith J. Veenhuizen
  • Patent number: 10294582
    Abstract: The present invention includes methods of promoting single crystal growth via solid-solid transformation of an appropriate glass, while avoiding the gaseous or liquid phase. In certain embodiments, in the all-solid-state glass-to-crystal transformation of the invention, extraneous nucleation is avoided relative to crystal growth via spatially localized laser heating and optional inclusion of a suitable glass former in the composition. The ability to fabricate patterned single-crystal architecture on a glass surface was demonstrated, providing a new class of micro-structured substrate for low cost epitaxial growth and active planar devices, for example.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: May 21, 2019
    Assignee: LEHIGH UNIVERSITY
    Inventors: Himanshu Jain, Dmytro Savytskyy, Volkmar Dierolf
  • Publication number: 20190079320
    Abstract: In one aspect the invention provides a graded refractive index single crystal waveguide having a glass block containing at least one crystal core, the crystal core having a central portion extending along an axis from a first end to a second end; an interface defining a peripheral boundary of the crystal core at a junction of the crystal core and an adjacent portion of the glass block, and a continuous, radially symmetric misorientation transverse to the central portion; wherein the misorientation has a misorientation angle that increases with increasing distance from the central portion towards the interface.
    Type: Application
    Filed: November 14, 2018
    Publication date: March 14, 2019
    Applicant: Lehigh University
    Inventors: Himanshu Jain, Volkmar Dierolf, Keith J. Veenhuizen
  • Publication number: 20180136493
    Abstract: In one aspect the invention provides a graded refractive index single crystal waveguide having a glass block containing at least one crystal core, the crystal core having a central portion extending along an axis from a first end to a second end; an interface defining a peripheral boundary of the crystal core at a junction of the crystal core and an adjacent portion of the glass block, and a continuous, radially symmetric misorientation transverse to the central portion; wherein the misorientation has a misorientation angle that increases with increasing distance from the central portion towards the interface.
    Type: Application
    Filed: November 17, 2017
    Publication date: May 17, 2018
    Inventors: Himanshu Jain, Volkmar Dierolf, Keith J. Veenhuizen
  • Publication number: 20170081777
    Abstract: The present invention includes methods of promoting single crystal growth via solid-solid transformation of an appropriate glass, while avoiding the gaseous or liquid phase. In certain embodiments, in the all-solid-state glass-to-crystal transformation of the invention, extraneous nucleation is avoided relative to crystal growth via spatially localized laser heating and optional inclusion of a suitable glass former in the composition. The ability to fabricate patterned single-crystal architecture on a glass surface was demonstrated, providing a new class of micro-structured substrate for low cost epitaxial growth and active planar devices, for example.
    Type: Application
    Filed: September 22, 2016
    Publication date: March 23, 2017
    Inventors: HIMANSHU JAIN, DMYTRO SAVYTSKYY, VOLKMAR DIEROLF