Phosphor blends for generating white light from near-UV/blue light-emitting devices
AssigneeGeneral Electric Company
InventorsAnant Achyut Setlur, Alok Mani Srivastava, Holly Ann Comanzo, Daniel Darcy Doxsee
Life of this patent
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Abstract
Phosphor blends are disclosed that are capable of absorbing electromagnetic ation having wavelengths in the range from about 315 nm to about 480 nm. O25:Eu2+,(Sr,Ba,Ca)5(PO4)3(Cl,OH):Eu2+,(Ba,Ca,Sr)2MgAl16O27: Eu2+, and (Ba,Ca,Sr)2MgAl16O27:Eu2+,Mn2+. White light sources are obtained by lying a phosphor blend over at least one LED that is capable of emitting electromagnetic radiation in the above-noted wavelength range.
Claims27
A phosphor blend comprising at least two phosphors selected from the group consisting of (a) Sr22+P2O7(Eu 2+,Mn2+;
- (b) (Ca,Sr,Ba)a(PO4)3 (F,Cl,OH):Eu2+, Mn2+ wherein a is in a range from about 4.5 to and including 5;
- (c) 3.5MgO.0.5MgF2GeO2:Mn4+;
- (d) Sr4Al14O25:Eu2+;
- (e) (Sr,Ba,Ca)5(PO4)3(Cl,OH):Eu2+;
- (f) an europium-activated aluminate consisting of (a) Sr22+P2O7(Eu 2+,Mn2+;
- (b) (Ca,Sr,Ba)a(PO4)3 (Ba,Ca,Sr)MgAl10O17:Eu2+, and (Ba,Ca,Sr)Mg3Al14O25:Eu2+, and (g) an europium and manganese co-activated aluminate phosphor selected from the group consisting of (Ba,Ca,Sr)2MgAl16O27:Eu2+, Mn2+, (Ba,Ca,Sr)MgAl10O17:Eu2+, Mn2+, and (Ba,Ca,Sr)Mg3Al14O25:Eu2+, Mn3+;
- said phosphor blend being capable of absorbing electromagnetic radiation having wavelengths in a range from about 315 nm to about 480 nm and emitting light having wavelengths in the visible spectrum.
A phosphor blend comprising a mixture of Sr2P2O7:Eu2+, Mn2+ and at least one phosphor that is selected from the grip consisting of (a) (Ca,Sr,Ba)a(PO4)3(F,Cl,OH):Eu2+, Mn2+ wherein a is in a range from about 4.5 to and including 5;
- (b) 3.5MgO.0.5MgF2GeO2:Mn14+;
- (c) Sr4Al4O25:Eu2+;
- (d) (Sr,Ba,Ca)5(PO4)3(Cl,OH):Eu2+;
- (e) an europium activated aluminate phosphor selected from the group consisting of (Ba,Ca,Sr)2MgAl16O27:Eu2+, (Ba,Ca,Sr)MgAl10O17:Eu2+, and (Ba,Ca,Sr)Mg2Al14O25:Eu2+;
- and (f) an europium and manganese co-activated aluminate phosphor selected from the group consisting of (Ba,Ca,Sr)2MgAl16O27:Eu2+, Mn2+, (Ba,Ca,Sr)MgAl10O17:Eu2+, Mn2+, and (Ba,Ca,Sr)Mg3Al14O25:Eu2+, Mn2+;
- said phosphor blend being capable of absorbing electromagnetic radiation having wavelengths in a range from about 315 nm to about 480 nm and emitting light having wavelengths in the visible spectrum.
A phosphor blend comprising a mixture of (Ca,Sr,Ba)a(PO4)3(F,Cl,OH):Eu2+, Mn2+ wherein a is in a range from about 4.5 to and including 5 and at least one phosphor that is selected from the group consisting of (a) Sr2P2O7:Eu2+, Mn2+;
- (b) 3.5MgO.0.5MgF2GeO2:Mn4+;
- (c) Sr4Al14O25:Eu2+;
- (d) (Sr,Ba,Ca)5(PO4)3(Cl,OH):Eu2+;
- (e) an europium activated aluminate phosphor selected from the group consisting of (Ba,Ca,Sr)2MgAl16O27:Eu2+, (Ba,Ca,Sr)MgAl10O17:Eu2+, and (Ba,Ca,Sr)Mg3Al14O25:Eu2+;
- and (f) an europium and manganese co-activated aluminate phosphor selected from the group consisting of (Ba,Ca,Sr)2MgAl16O27:Eu2+,Mn2+, (Ba,Ca,Sr)MgAl10O17:Eu2+, Mn2+, and (Ba,Ca,Sr)Mg3Al14O25:Eu2+, Mn2+;
- said phosphor blend being capable of absorbing electromagnetic radiation having wavelengths in a range from about 315 nm to about 480 nm and emitting light having wavelengths in the visible spectrum.
A phosphor blend comprising a mixture of Sr2P2O7:Eu2+,Mn2+ and (Ca,Sr,Ba)5(PO4)3(F,Cl,OH):Eu2+, Mn2+;
- wherein a is in a range from about 4.5 to and including 5, and said phosphor blend being capable of absorbing electromagnetic radiation having wavelengths in a range from about 315 nm to about 480 nm and emitting light having wavelengths in the visible spectrum.
A phosphor blend comprising a mixture of phosphors having formulas 3.5MgO 0.5MgF2GeO2:Mn4+;
- Sr4Al14O25:Eu2+;
- and an europium and manganese co-invented aluminate phosphors selected from the group consisting of (Ba,Ca,Sr)2MgAl16O27:Eu2+,Mn2+, (Ba,Ca,Sr)MgAl10O17:Eu2+, Mn2+, (Ba,Ca,Sr)Mg3Al14O25:Eu2+, Mn2+;
- said phosphor blend being capable of absorbing electromagnetic radiation having wavelengths in a range from about 315 nm to about 480 nm and emitting light having wavelengths in the visible spectrum.
A phosphor blend comprising a mixture of phosphors having formulas 3.5MgO.0.5MgF2GeO2:Mn4+;
- Sr4Al14O25:Eu2+;
- and an europium and manganese co-activated aluminate phosphors selected from the group consisting of (Ba,Ca,Sr)2MgAl16O27:Eu2+,Mn2+, (Ba,Ca,Sr)MgAl10O17:Eu2+,Mn2+, and (Ba,Ca,Sr)Mg3Al14O25:Eu2+,Mn2+;
- said phosphor blend being capable of absorbing electromagnetic radiation having wavelengths in a range from about 315 nm to about 480 nm and emitting light having wavelengths in the visible spectrum.
A phosphor blend comprising a mixture of phosphors having a formula of 3.5MgO.0.5MgF2GeO2:Mn4+;
- (Sr,Ba,Ca)5(PO4)3(Cl,OH):Eu2+;
- and an europium and manganese co-activated aluminate phosphor selected from the group consisting of (Ba,Ca,Sr)2MgAl16O27:Eu2+,(Ba,Ca,Sr)MgAl10O17:Eugroup consisting of (Ba,Ca,Sr)2MgAl16O27:Eu2+,(Ba,Ca,Sr)MgAl10O17:Eu2+, Mn2+, and (Ba,Ca,Sr)Mg3Al14O25:Eu2+, Mn2+;
- said wavelengths in a range from about 315 nm to about 480 nm and emitting light having wavelengths in the visible spectrum.
A light source comprising:
- at least one LED that is capable of emitting electromagnetic radiation having wavelengths in a range from near UV to blue;
- least one phosphor material selected from the group consisting of (a) Sr2P2O7:Eu2+,Mn2+;
- (b) (Ca,Sr,Ba)a(PO4)3(F,Cl,OH):Eu2+,Mn2+ wherein a is in a range from about 4.5 to and including 5;
- (c) 3.5MgO.0.5MgF2GeO2:Mn4+;
- (d) Sr4Al14O25:Eu2+;
- (e) (Sr,Ba,Ca)5(PO4)3(Cl,OH):Eu2+;
- (f) an europium-activated aluminate phosphor selected from the group consisting of (Ba,Ca,Sr)2MgAl16O27:Eu2+, (Ba,Ca,Sr)MgAl10O17:Eu2+, and (Ba,Ca,Sr)Mg3Al14O25:Eu2+;
- and (g) an europium and manganese co-activated aluminate phosphor selected from the group consisting of (Ba,Ca,Sr)2MgAl16O27:Eu2+, Mn2+, (Ba,Ca,Sr)MgAl10O17:Eu2+, Mn2+, and (Ba,Ca,Sr)Mg3Al14O25:Eu2+, Mn2+;
- and (h) mixtures thereof;
- said phosphor material being capable of absorbing said electromagnetic radiation emitted by said LED and emitting light having wavelengths in the visible spectrum.
A light source comprising:
- at least one LED that is capable of emitting electromagnetic radiation having wavelengths in a range from near UV to blue;
- and a phosphor material selected from the group consisting of Sr2P2O7:Eu2+, Mn2+, (Ca,Sr,Ba)a(PO4)3(F,Cl,OH)Eu2+, Mn2+ wherein a is in a range from about 4.5 to and including 5, and mixtures thereof;
- said phosphor being capable of absorbing said electromagnetic radiation emitted by said LED and emitting light having wavelengths in the visible spectrum.
Dependencies are inferred from the claim text.