US Patent 8188494 - White LED with nanowire light conversion

http://www.freepatentsonline.com/8188494.html

This patent from HP teaches forming a white light LED using a single UV or blue LED and nanoparticle material to convert the blue light to light including green and red wavelengths. Claim 1 reads:

1. An apparatus comprising:

a light emitting diode that is for outputting light comprising a blue wavelength;

a nanowire or nanoparticle coupled to a surface of said light emitting diode;

a second nanowire or nanoparticle coupled to said surface of said light emitting diode, wherein said nanowire is doped differently than said second nanowire; and

an electrode coupled to said light emitting diode, wherein said nanowire or nanoparticle is for receiving and converting said light into red and green light that is output from said nanowire or nanoparticle.