Articles using persistent phosphors
View Patent ↗An article of manufacture that comprises a structure that is a security system device (or portion thereof) or a fire system device (or portion), where a persistent phosphor and/or a persistent phosphor blend is either integrated in a coating on the structure; applied on the structure; or integrated in the structure, wherein the persistent phosphor comprises certain phosphors or phosphor blends. The present invention has been described in terms of specific embodiment(s), and it is recognized that equivalents, alternatives, and modifications, aside from those expressly stated, are possible and within the scope of the appending claims.
1. An article of manufacture comprising:
a structure, wherein the structure is one selected from a group consisting of: a security system device, a portion of a security system device, a fire system device and a portion of fire system device;
at least one of a persistent phosphor and a persistent phosphor blend, wherein the persistent phosphor and the persistent phosphor blend is one of:
integrated in a coating on the structure;
applied on the structure; and
integrated in the structure,
wherein the persistent phosphor comprises a first phosphor and optionally a second phosphor and the persistent phosphor blend comprises a first persistent phosphor blend and optionally a second persistent phosphor blend,
wherein the first phosphor is at least one of:
a phosphor selected from phosphors of formula I and phosphors of formula II;
M 1 F 2 -M 1 S:Eu 2+ ,Ln 3+ (I)
M 2 3 M 3 2 O 5 X 2 : Eu 2+ ,Ln 3+ (II)
wherein
M 1 is Ba, Sr, Ca, Zn, Mg, or a combination thereof;
M 2 is Ba, Sr, Ca, Mg, Zn, or a combination thereof;
M 3 is Al, Ga, B, In, or a combination thereof;
X is F, C 1 , Br, I, or a combination thereof; and
Ln is Dy, Yb, Tm, Er, Ho, Sm, Nd, or a combination thereof; and
wherein the second phosphor comprises a general formula of A x-y-z Al 2-m-n-o-p O 4 :Eu y , RE z , B m , Zn n , Co o , Sc p wherein:
A is Ba, Sr, Ca, or a combination of these metals;
X is between about 0.75 and 1.3;
y is between about 0.0005 and 0.1;
z is between about 0.0005 and 0.1;
m is between about 0.0005 and 0.30;
n is between about 0.0005 and 0.10;
o is between about 0 and 0.01;
p is between about 0 and 0.05; and
RE is Dy, Nd, or a combination thereof; and
wherein the first persistent phosphor blend comprises:
the persistent phosphor; and
at least one other persistent phosphor, where an excitation spectrum of the at least one other persistent phosphor partially overlaps an emission spectrum of the persistent phosphor; and
wherein the second persistent phosphor blend comprises:
at least one second persistent phosphor comprising a composition selected from the group consisting of:
a) a composition having a general formula A x-y-z A1 2-m-n-o-p O 4 :Eu y , Dy z , Bm, Zn n , Co o , Sc p , where A is Ba, Sr, Ca, or a combination of these elements, x is between about 0.75 and 1.3, y is between about 0.0005 and about 0.1, z is between about 0.0005 and about 0.1, m is between about 0.0005 and about 0.30, n is between about 0.0005 and about 0.10, o is between about 0 and about 0.01 and p is between about 0 and about 0.05, and
b) a composition having general formula A x-y-z A1 2-m-n-o-p O 4 :Eu y , Nd z , Bm, Zn n , Co o , Sc p , where A is Ba, Sr, Ca, or a combination of these elements, x is between about 0.75 and about 1.3, y is between about 0.0005 and about 0.1, z is between about 0.0005 and about 0.1, m is between about 0.0005 and about 0.30, n is between about 0.0005 and about 0.10, o is between about 0 and about 0.01, and p is between about 0 and about 0.05; and
at least one third phosphor, wherein the excitation spectrum of the at least one third phosphor partially overlaps the emission spectrum of the second persistent phosphor.
2. The article of manufacture of claim 1 , wherein the security device is one of a sensor, a panel, an access device, and combinations thereof.
3. The article of manufacture of claim 1 , wherein the fire system device is one of, a fire call box, a panel, a sensor, a sounder, and combinations thereof.
4. The article of manufacture of claim 1 , wherein the coating is a paint.
5. The article of manufacture of claim 1 , wherein the structure comprises a resin.
6. The article of manufacture of claim 5 , wherein the integrated in the structure comprises incorporating the persistent phosphor in the resin.
7. The article of manufacture of claim 1 , wherein the portion comprises glass.
8. The article of manufacture of claim 1 , wherein the portion comprises signage.
9. The article of manufacture of claim 1 , wherein a color of the persistent phosphor provides an indicia of a function of the structure.