Patents by Inventor Heidi Dieringer

Heidi 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: 8791642
    Abstract: Light emitting devices include a first string of LEDs that emit light having a color point that is within at least eight MacAdam ellipses of a first blue-shifted-yellow region on the 1931 CIE Chromaticity Diagram, a second string of LEDs that emit light having color point that is within at least eight MacAdam ellipses of 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 supplies respective drive currents to the first string of LEDs, the second string of LEDs and the third light source, at least two of which are independently controllable.
    Type: Grant
    Filed: July 11, 2012
    Date of Patent: July 29, 2014
    Assignee: Cree, Inc.
    Inventors: Antony P. van de Ven, Jason Taylor, Paul Kenneth Pickard, Gauss Ho Ching So, Heidi Dieringer, Andrew Dummer
  • Semiconductor Light Emitting Devices Having Selectable and/or Adjustable Color Points and Related Methods
    Publication number: 20130002157
    Abstract: Light emitting devices include a first string of LEDs that emit light having a color point that is within at least eight MacAdam ellipses of a first blue-shifted-yellow region on the 1931 CIE Chromaticity Diagram, a second string of LEDs that emit light having color point that is within at least eight MacAdam ellipses of 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 supplies respective drive currents to the first string of LEDs, the second string of LEDs and the third light source, at least two of which are independently controllable.
    Type: Application
    Filed: July 11, 2012
    Publication date: January 3, 2013
    Inventors: Antony P. van de Ven, Jason Taylor, Paul Kenneth Pickard, Gauss Ho Ching So, Heidi Dieringer, Andrew Dummer