Patents by Inventor Heidi M. Dieringer

Heidi M. Dieringer 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).

  • Semiconductor light emitting devices having selectable and/or adjustable color points and related methods
    Patent number: 9006986
    Abstract: Semiconductor light emitting devices are provided that include a first string of light emitting diodes (“LED”) that emit unsaturated light having a color point that is within at least eight MacAdam ellipses of one or more points within a first blue-shifted-yellow region on the 1931 CIE Chromaticity Diagram, a second string of LEDs that emit unsaturated light having color point that is within at least eight MacAdam ellipses from one or more points within a second blue-shifted-green region on the 1931 CIE Chromaticity Diagram, and a third light source that emits radiation having a dominant wavelength between 600 and 720 nm. A drive circuit is provided that is configured to supply a first drive current to the first string of LEDs, a second drive current to the second string of LEDs and a third drive current to the third string of LEDs, wherein at least two of the first, second and third drive currents are independently controllable.
    Type: Grant
    Filed: June 10, 2014
    Date of Patent: April 14, 2015
    Assignee: Cree, Inc.
    Inventors: Antony P. van de Ven, Jason E. Taylor, Paul K. Pickard, Gauss Ho Ching So, Heidi M. Dieringer, Andrew Dummer
  • Semiconductor Light Emitting Devices Having Selectable and/or Adjustable Color Points and Related Methods
    Publication number: 20150002034
    Abstract: Semiconductor light emitting devices are provided that include a first string of light emitting diodes (“LED”) that emit unsaturated light having a color point that is within at least eight MacAdam ellipses of one or more points within a first blue-shifted-yellow region on the 1931 CIE Chromaticity Diagram, a second string of LEDs that emit unsaturated light having color point that is within at least eight MacAdam ellipses from one or more points within a second blue-shifted-green region on the 1931 CIE Chromaticity Diagram, and a third light source that emits radiation having a dominant wavelength between 600 and 720 nm. A drive circuit is provided that is configured to supply a first drive current to the first string of LEDs, a second drive current to the second string of LEDs and a third drive current to the third string of LEDs, wherein at least two of the first, second and third drive currents are independently controllable.
    Type: Application
    Filed: June 10, 2014
    Publication date: January 1, 2015
    Inventors: Antony P. van de Ven, Jason E. Taylor, Paul K. Pickard, Gauss Ho Ching So, Heidi M. Dieringer, Andrew Dummer