US Patent 7819910 - Nanostructured uv source for tanning booth

http://www.freepatentsonline.com/7819910.html

This patent from LEDeep LLC is concerned with the problem of overexposure tanning which can result in skin damage when using florescent light and instead teaches using nanostructured UV light sources. Claim 1 reads:

1. A system for at least one of skin tanning and phototherapy, comprising:

a chamber adapted for at least one of skin tanning and phototherapy; and

a nanostructure UV light emitting device;

wherein: a UV excitation source is positioned to provide a UV excitation radiation of a first peak wavelength onto the nanostructure UV light emitting device to cause the nanostructure UV light emitting device to emit UVA light having a second UVA peak wavelength longer than the first peak wavelength, wherein the nanostructure UV light emitting device comprises at least one of a nanoparticle or a nanowire device for emitting only UVA light.