Patents by Inventor Charles Tu

Charles Tu 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).

  • High Efficiency Dilute Nitride Light Emitting Diodes
    Publication number: 20090108276
    Abstract: A light-emitting diode comprising AlnInmGa1-m-nNcAsvSbkP1-c-v-k where 0.001<c<0.1 and 0?n, m, v, k?1 adapted to emit light in a wavelength range of about 540 nm to about 700 nm.
    Type: Application
    Filed: October 31, 2008
    Publication date: April 30, 2009
    Inventors: Charles Tu, Vladimir Odnoblyudov
  • High Efficiency Light-Emitting Diodes
    Publication number: 20080111123
    Abstract: High efficiency LEDs produced using a direct-bandgap AlGaInNSbAsP material system grown directly on GaP substrates.
    Type: Application
    Filed: October 8, 2005
    Publication date: May 15, 2008
    Applicant: The Regents of the University of California
    Inventors: Charles Tu, Vladimir Odnoblyudov