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US 8,987,984 B2Granted
Fluorescent lamp including phosphor composition with special BAMn phosphor, (Ba,Sr,Ca)(Mg1-x Mnx)Al10O17:Eu2+
AssigneeGeneral Electric Company
InventorsWilliam Erwin Cohen, Fangming Du, William Beers, Jon Bennett Jansma
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Abstract
A fluorescent lamp includes a phosphor composition comprising: Y2O3:Eu3+ (YEO); at least one of LaPO4:Ce3+, Tb3+ (LAP), MgAl11O19:Ce3+, Tb3+ (CAT) or GdMgB5O10:Ce3+, Tb3+ (CBT); a special BAMn phosphor, (Ba,Sr,Ca)(Mg1-xMnx)Al10O17:Eu2+, with a specific amount of Mn (x) as disclosed herein, and optionally halophosphor, with the proviso that there is no BaMgAl10O17:Eu2+ (BAM).
Claims13
A fluorescent lamp including a phosphor composition comprising Y2O3:Eu3+ (YEO);
- LaPO4:Ce3+, Tb3+ (LAP), MgAl11O19:Ce3+, Tb3+ (CAT) or GdMgB5O10:Ce3+, Tb3+ (CBT);
- and (Ba,Ca)(Mg1-xMnx)Al10O17:Eu2+ where x ranges from 0.026-0.049, with the proviso that there is no BaMgAl10O17:Eu2+ (BAM);
- wherein CRI of the lamp is at least 87 across all color temperatures.
A fluorescent lamp including a phosphor composition comprising:
- Y2O3:Eu3+ (YEO);
- LaPO4:Ce3+, Tb3+ (LAP), MgAl11O19:Ce3+, Tb3+ (CAT) or GdMgB5O10:Ce3+, Tb3+ (CBT);
- Halophosphor;
- and (Ba,Ca)(Mg1-xMnx)Al10O17:Eu2+ with the proviso that there is no BaMgAl10O17:Eu2+ (BAM);
- and wherein CRI of the lamp is at least 87, and where x is selected from the following group ranges consisting of:
- (1), x ranges from 0.102-0.154 when chromaticity coordinates ccx, ccy are within a four step oval centered at ccx=0.440, ccy=0.403;
- (2), x ranges from 0.090-0.134 when chromaticity coordinates ccx, ccy are within a four step oval centered at ccx=0.413, ccy=0.393;
- (3), x ranges from 0.078-0.116 when chromaticity coordinates ccx, ccy are within a four step oval centered at ccx=0.380, ccy=0.380;
- (4), x ranges from 0.074-0.110 when chromaticity coordinates ccx, ccy are within a four step oval centered at ccx=0.346, ccy=0.359;
- and
- (5), x ranges from 0.060-0.090 when chromaticity coordinates ccx, ccy are within a four step oval centered at ccx=0.313, ccy=0.337.
8 more elements
Dependencies are inferred from the claim text.