Phosphor blends for green traffic signals
First Claim
Patent Images
1. A blue-green light emitting system, comprising a semiconductor light emitter;
- and a luminescent material, wherein said illumination system has an emission having CIE color coordinates located within an area of a pentagon on a CIE chromaticity diagram, whose corners have the following CIE color coordinates;
e) x=0.0137 and y=0.4831;
b) x=0.2240 and y=0.3890;
c) x=0.2800 and y=0.4500;
g) x=0.2879 and y=0.5196; and
h) x=0.0108 and y=0.7220.wherein said luminescent material comprises two or more phosphor compositions selected from the group consisting of;
(Ba,Sr,Ca)5(PO4)3(Cl,F,Br,OH);
Eu2+;
(Ba,Sr,Ca)MgAl10O17;
Eu2+;
(Ba,Sr,Ca)BPO5;
Eu2+;
(Sr,Ca)10(PO4)6*nB2O3;
Eu2+ where n>
0;
2SrO*0.84P2O5*0.16B2O3;
Eu2+;
Sr2Si3O8*2SrCl2;
Eu2+;
Ba3MgSi2O8;
Eu2+;
Sr4Al14O25;
Eu2+;
BaAl8O13;
Eu2+;
(Ba,Sr,Ca)Al2−
xSixO4−
xNx;
Eu2+ where x≦
2;
(Ba,Sr,Ca)2SiO4;
Eu2+;
(Sr,Ca,Ba)(Al,Ga,In)2S4;
Eu2+,Ce3+;
(Ca,Sr)8(Mg,Zn)(SiO4)4Cl2;
Eu2+;
(Y,Lu,Gd,Tb,Sc)2(Ca,Mg)1−
r(Mg,Zn)2+rSiz−
qGeqO12+δ
;
Ce where r≦
1 and z,q,δ
≧
0;
(Y,Gd,Tb,La,Sm,Pr,Lu)3(Al,Ga)5O12;
Ce3+;
Sr—
SiON;
Eu2+,Ce3+;
MSi3N5, M2Si4N7, M4Si6N11, M9Si11N23, M16Si15O6N32, MSiAl2O3N2, M13Si18Al12O18N36, MSi5Al2ON9 and M3Si5AlON10 where M can be a divalent cation or a trivalent cation doped with Eu2+ and/or Ce3+; and
(Mg,Ca,Sr,Ba)pSiqAlrOxNy, where 1≦
p≦
16;
0≦
q<
30;
0≦
r<
15, 0≦
x<
20 and 0<
y<
40 doped with Eu2+ and/or Ce+.
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Accused Products
Abstract
There is provided a blue-green illumination system, including a semiconductor light emitter, and a luminescent material, wherein the system has an emission with CIE color coordinates located within an area of a of a pentagon on a CIE chromaticity diagram, whose corners have the following CIE color coordinates: i) x=0.0137 and y=0.4831; ii) x=0.2240 and y=0.3890; iii) x=0.2800 and y=0.4500; iv) x=0.2879 and y=0.5196; and v) x=0.0108 and y=0.7220. The luminescent material includes two or more phosphors. The illumination system may be used as the green light of a traffic light or an automotive display.
100 Citations
19 Claims
-
1. A blue-green light emitting system, comprising a semiconductor light emitter;
- and a luminescent material, wherein said illumination system has an emission having CIE color coordinates located within an area of a pentagon on a CIE chromaticity diagram, whose corners have the following CIE color coordinates;
e) x=0.0137 and y=0.4831; b) x=0.2240 and y=0.3890; c) x=0.2800 and y=0.4500; g) x=0.2879 and y=0.5196; and h) x=0.0108 and y=0.7220. wherein said luminescent material comprises two or more phosphor compositions selected from the group consisting of;
(Ba,Sr,Ca)5(PO4)3(Cl,F,Br,OH);
Eu2+;
(Ba,Sr,Ca)MgAl10O17;
Eu2+;
(Ba,Sr,Ca)BPO5;
Eu2+;
(Sr,Ca)10(PO4)6*nB2O3;
Eu2+ where n>
0;
2SrO*0.84P2O5*0.16B2O3;
Eu2+;
Sr2Si3O8*2SrCl2;
Eu2+;
Ba3MgSi2O8;
Eu2+;
Sr4Al14O25;
Eu2+;
BaAl8O13;
Eu2+;
(Ba,Sr,Ca)Al2−
xSixO4−
xNx;
Eu2+ where x≦
2;
(Ba,Sr,Ca)2SiO4;
Eu2+;
(Sr,Ca,Ba)(Al,Ga,In)2S4;
Eu2+,Ce3+;
(Ca,Sr)8(Mg,Zn)(SiO4)4Cl2;
Eu2+;
(Y,Lu,Gd,Tb,Sc)2(Ca,Mg)1−
r(Mg,Zn)2+rSiz−
qGeqO12+δ
;
Ce where r≦
1 and z,q,δ
≧
0;
(Y,Gd,Tb,La,Sm,Pr,Lu)3(Al,Ga)5O12;
Ce3+;
Sr—
SiON;
Eu2+,Ce3+;
MSi3N5, M2Si4N7, M4Si6N11, M9Si11N23, M16Si15O6N32, MSiAl2O3N2, M13Si18Al12O18N36, MSi5Al2ON9 and M3Si5AlON10 where M can be a divalent cation or a trivalent cation doped with Eu2+ and/or Ce3+; and
(Mg,Ca,Sr,Ba)pSiqAlrOxNy, where 1≦
p≦
16;
0≦
q<
30;
0≦
r<
15, 0≦
x<
20 and 0<
y<
40 doped with Eu2+ and/or Ce+.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- and a luminescent material, wherein said illumination system has an emission having CIE color coordinates located within an area of a pentagon on a CIE chromaticity diagram, whose corners have the following CIE color coordinates;
-
11. A traffic signal, comprising:
-
a housing; at least one lens; a radiation source having a peak emission wavelength of 480 nm or below; and a luminescent material, wherein said signal has an emission having CIE color coordinates located within an area of a quadrilateral on a CIE chromaticity diagram, whose corners have the following CIE color coordinates; a) x=0.000 and y=0.506; b) x=0.224 and y=0.389; c) x=0.280 and y=0.45; and d) x=0.000 and y=0.730. wherein said luminescent material comprises two or more phosphor compositions selected from the group consisting of;
(Ba,Sr,Ca)5(PO4)3(Cl,F,Br,OH);
Eu2+;
(Ba,Sr,Ca)MgAl10O17;
Eu2+;
(Ba,Sr,Ca)BPO5;
Eu2+;
(Sr,Ca)10(PO4)6*nB2O3;
Eu2+where n>
0;
2SrO0.84P2O5*0.16B2O3;
Eu2+;
Sr2Si3O8*2SrCl2;
Eu2+;
Ba3MgSi2O8;
Eu2+;
Sr4Al14O25;
Eu2+;
BaAl8O13;
Eu2+;
(Ba,Sr,Ca)Al2O4;
Eu2+;
(Ba,Sr,Ca)Al2−
xSixO4−
Nx;
Eu2+where x≦
2;
(Sr,Ca,Ba)(Al,Ga,In)2S4;
Eu2+,Ce3+;
(Ca,Sr)8(Mg,Zn)(SiO4)4Cl2;
Eu2+;
(Y,Lu,Gd,Tb,Sc)2(Ca,Mg)1−
r(Mg,Zn)2+rSiz−
qGeqO12+δ
;
Ce where r≦
1 and z,q,δ
≧
0;
(Y,Gd,Tb,La,Sm,Pr,Lu)3(Al,Ga)5O12;
Ce3+;
Sr—
SiON;
Eu2+,Ce3+;
MSi3N5, M2Si4N7, M4Si6N11, M9Si11N23, M16Si15O6N32, MSiAl2O3N2, M13Si18Al12O18N36, MSi5Al2ON9 and M3Si5AlON10 where M can be a divalent cation or a trivalent cation doped with Eu2+ and/or Ce3+; and
(Mg,Ca,Sr,Ba)pSiqAlrOxNy, where 1≦
p≦
16;
0≦
q<
30;
0≦
r<
15, 0≦
x<
20 and 0<
y<
40 doped with Eu2+ and/or Ce3+.- View Dependent Claims (12, 13, 14, 15)
-
-
16. A blue-green light emitting system, comprising a semiconductor light emitter;
- and a luminescent material, wherein said illumination system has an emission having CIE color coordinates located within an area of a pentagon on a CIE chromaticity diagram, whose corners have the following CIE color coordinates;
e) x=0.0137 and y=0.4831; b) x=0.2240 and y=0.3890; c) x=0.2800 and y=0.4500; g) x=0.2879 and y=0.5196; and h) x=0.0108 and y=0.7220; wherein said luminescent material comprises two or more phosphor compositions selected from the group consisting of;
(Ba,Sr,Ca)5(PO4)3(Cl,F,Br,OH);
Eu2+;
(Ba,Sr,Ca)MgAl10O17;
Eu2+;
(Ba,Sr,Ca)BPO5;
Eu2+;
(Sr,Ca)10(PO4)6*nB2O3;
Eu2+ where n>
0;
2SrO* 0.84P2O5*0.16B2O3;
Eu2+;
Sr2Si3O8* 2SrCl2;
Eu2+;
Ba3MgSi2O8;
Eu2+;
Sr4Al14O25;
Eu2+;
BaAl8O13;
Eu2+;
(Ba,Sr,Ca)Al204;
Eu2+;
(Ba,Sr,Ca)Al2−
xSixO4−
xNx;
Eu2+ where x≦
2;
(Sr,Ca,Ba)(Al,Ga,In)2S4;
Eu2+,Ce3+;
(Ca,Sr)8(Mg,Zn)(SiO4)4Cl2;
Eu2+;
(Y,Lu,Gd,Tb,Sc)2(Ca,Mg)1−
r(Mg,Zn)2+rSiz−
qGeqO12+δ
;
Ce where r≦
1 and z,q,δ
≧
0;
(Y,Gd,Tb,La,Sm,Pr,Lu)3(Al,Ga)5O12;
Ce3+;
Sr—
SiON;
Eu2+,Ce3+;
MSi3N5, M2Si4N7, M4Si6N11, M9Si11N23, M16Si15O6N32, MSiAl2O3N2, M13Si18Al12O18N36, MSi5Al2ON9 and M3Si5AlON10 where M can be a divalent cation or a trivalent cation doped with Eu2+ and/or Ce3+; and
(Mg,Ca,Sr,Ba)pSiqAlrOxNy, where 1≦
p≦
16;
0≦
q<
30;
0≦
r<
15, 0≦
x<
20 and 0<
y<
40 doped with Eu2+ and/or Ce+.- View Dependent Claims (17, 18)
- and a luminescent material, wherein said illumination system has an emission having CIE color coordinates located within an area of a pentagon on a CIE chromaticity diagram, whose corners have the following CIE color coordinates;
-
19. A blue-green light emitting system, comprising a semiconductor light emitter;
- and a luminescent material, wherein said illumination system has an emission having CIE color coordinates located within an area of a pentagon on a CIE chromaticity diagram, whose corners have the following CIE color coordinates;
e) x=0.0137 and y=0.4831; b) x=0.2240 and y=0.3890; c) x=0.2800 and y=0.4500; g) x=0.2879 and y=0.5196; and h) x=0.0108 and y=0.7220; wherein said luminescent material comprises a blend of Sr4Al14O25;
Eu2+ and at least one additional phosphor selected from the group consisting of;
(Ba,Sr,Ca)5(PO4)3(Cl,F,Br,OH);
Eu2+;
(Ba,Sr,Ca)MgAl10O17;
Eu2+;
(Ba,Sr,Ca)BPO5;
Eu2+;
(Sr,Ca)10(PO4)6* nB2O3;
Eu2+ where n>
0;
2SrO* 0.84P2O5* 0.16B2O3;
Eu2+;
Sr2Si3O8* 2SrCl2;
Eu2+;
Ba3MgSi2O8;
Eu2+;
BaAl8O13;
Eu2+;
(Ba,Sr,Ca)Al2O4;
Eu2+;
(Ba,Sr,Ca)Al2−
xSixO4−
xNx;
Eu2+ where x≦
2;
(Ba,Sr,Ca)2SiO4;
E2+;
(Ba,Sr,Ca)2(Mg,Zn)Si2O7;
Eu2+;
(Sr,Ca,Ba)(Al,Ca,In)2S4;
Eu2+,Ce3+;
(Ca,Sr)8(Mg,Zn)(SiO4)4Cl2;
Eu2+;
(Y,Lu,Gd,Tb,Sc)2(Ca,Mg)1−
r(Mg,Zn)2+rSiz−
qGeqO12+δ
;
Ce where r≦
1 and z,q,δ
≧
0;
(Y,Gd,Tb,La,Sm,Pr,Lu)3(Al,Ga)5O12;
Ce3+;
Sr—
SiON;
Eu2+,Ce3+;
MSi3N5, M2Si4N7, M4Si6N11, M9Si11N23, M16Si15O6N32, MSiAl2O3N2, M13Si18Al12O18N36, MSi5Al2ON9 and M3Si5AlON10 where M can be a divalent cation or a trivalent cation doped with Eu2+ and/or Ce3+; and
(Mg,Ca,Sr,Ba)pSiqAlrOxNy, where 1≦
p≦
16;
0≦
q<
30;
0≦
r<
15, 0≦
x<
20 and 0<
y<
40 doped with Eu2+ and/or Ce3+.
- and a luminescent material, wherein said illumination system has an emission having CIE color coordinates located within an area of a pentagon on a CIE chromaticity diagram, whose corners have the following CIE color coordinates;
Specification