Compositions – Inorganic luminescent compositions – Compositions containing halogen; e.g. – halides and oxyhalides
Reexamination Certificate
2011-08-30
2011-08-30
Lorengo, Jerry (Department: 1731)
Compositions
Inorganic luminescent compositions
Compositions containing halogen; e.g., halides and oxyhalides
C252S30140H, C252S30140F
Reexamination Certificate
active
08007685
ABSTRACT:
The present invention relates to a red light phosphor, which is based on sulfide and activating agent containing rare earth strontium or hafnium. It is characterized by that the aforementioned materials are a fluorine-sulfur oxide containing lanthanum-yttrium-zirconium and/or hafnium with its stoichiometric formula as (La1-x-y-zYxAyMez+4O)2S1(F−1)2z, and activating agent based on A=(TR+3=Σ Eu, Sm, Gd, Tb)+(TR+4═Pr+4), in which Me+4=Zr+4and/or Hf+4. Compared with standard materials, the luminous intensity of the phosphor according to the present invention is increased to 1.6-2.4 times. Further, the red light phosphor according to the present invention has a mean diameter of d50≈0.6 μm. The present invention also discloses a multilayer photo-transforming film, in which the three-layer agro-film is filled with phosphor. The agro-film is based on polythene and its derivatives and added with photostabilizer.
REFERENCES:
patent: 3980887 (1976-09-01), Mattis et al.
patent: 2004/0219116 (2004-11-01), Reynders et al.
patent: 2007/0215837 (2007-09-01), Chiruvolu et al.
patent: 101126025 (2008-02-01), None
Lo Wei-Hung
Naum Soshchin
Tsai Chi-Ruei
Edmondson Lynne
Lo Wei-Hung
Lorengo Jerry
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