Pearne & Gordon LLP
White persistent phosphor blend or layered structure
This disclosure features a blend, or use together in at least two layers of an article of manufacture, of a first persistent phosphor, a second persistent phosphor and a third phosphor. The first persistent phosphor has a formula I:Cax-y-z-aAaAl2-m-n-o-pOd:Euy,REz,Bm,Znn,Coo,Scp  Iwhere the variables are defined in the disclosure. The second persistent phosphor has a formula II:Srx-y-z-aAaAl14-m-n-o-pOd:Euy,REz,Bm,Znn,Coo,Scp  IIwhere the variables are defined in the disclosure. The third phosphor is a non-persistent phosphor that is excited at a wavelength in a range of 300-500 nm. Also featured is an article of manufacture including the blend or the phosphors present in at least two layers. Once the blend or layered structure comprising the three phosphors has been excited it can appear white in an absence of ambient light.
General Electric Company
C C C C
C09K C09K C09K C09K
inventional inventional inventional inventional
William W. Alok Holly Ann
Beers Srivastava Comanzo