Patents by Inventor Romit Dhar

Romit Dhar 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).

  • SOLID STATE LIGHTING DEVICE WITH REDUCED LUMINOUS FLUX DROP AT ELEVATED TEMPERATURE
    Publication number: 20150221815
    Abstract: A solid state light emitting device includes a solid state light emitter and a lumiphoric material that are selected for use with one another to provide light emissions with improved (i.e., reduced) thermal droop A solid state emitter having a short peak emission wavelength (e.g., in a visible range at or below 440 nm) seemingly less than optimal at room temperature for use with a particular lumiphor can trigger more efficient stimulation of lumiphor emissions at high temperatures. Enhanced epitaxial structures also inhibit decrease of radiant flux by LEDs at elevated temperatures.
    Type: Application
    Filed: January 31, 2014
    Publication date: August 6, 2015
    Inventors: David Clatterbuck, Harry Seibel, Romit Dhar, Robert David Schmidt, Daniel Carleton Driscoll, Michael John Bergmann