Claims
- 1. A light-emitting device comprising an UV-diode with a primary emission of 300 nm.ltoreq..lambda..ltoreq.370 nm and exposed to said emission a phosphor layer comprising a blue-emitting phosphor having an emission band, with 430 nm.ltoreq..lambda..ltoreq.490 nm, a green-emitting phosphor having an emission band, with 520 nm.ltoreq..lambda..ltoreq.570 nm, and a red-emitting phosphor having an emission band, with 590 nm.ltoreq..lambda..ltoreq.630 nm.
- 2. A light-emitting device as claimed in claim 1, characterized in that the red-emitting phosphor is a emitter having an emission band with a wavelength maximum of 605 nm.ltoreq..lambda..ltoreq.620 nm.
- 3. A light-emitting device as claimed in claim 1, characterized in that the green-emitting phosphor is a emitter having an emission band with a wavelength maximum of 520 nm.ltoreq..lambda..ltoreq.570 nm.
- 4. A light-emitting device as claimed in claim 1, characterized in that the UV-diode is a GaN diode.
- 5. A light-emitting device as claimed in claim 1, characterized in that the phosphor layer comprises a blue-emitting phosphor in a quantity x1 of 0<x1<30% by weight, a green-emitting phosphor in a quantity x2 of 20.ltoreq.x2.ltoreq.50% by weight and a red-emitting phosphor in a quantity x3 of 30.ltoreq.x3.ltoreq.70% by weight.
- 6. A light-emitting device as claimed in claim 1, characterized in that the phosphor layer comprises BaMgAl.sub.10 O.sub.17 :Eu as the blue-emitting phosphor, ZnS:Cu as the green-emitting phosphor and Y.sub.2 O.sub.2 S as the red-emitting phosphor.
- 7. A light-emitting device as claimed in claim 1, characterized in that the phosphor layer comprises a phosphor of the general formula [Eu(diketonate).sub.a X.sub.b1 X'.sub.b2 ] as the red-emitting phosphor, wherein X=pyridine or a monodentate pyridine derivative and X'=2,2'-bipyridine or a 2,2'-bipyridyl derivative and 2a+b.sub.1 +2b.sub.2 =8.
Priority Claims (2)
Number |
Date |
Country |
Kind |
197 08 407 |
Mar 1997 |
DEX |
|
197 56 360 |
Dec 1997 |
DEX |
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CROSS REFERENCE TO RELATED APPLICATIONS
This is a continuation of application Ser. No. PCT/IB98/00219, filed Feb. 23, 1998.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
5813753 |
Vriens et al. |
Sep 1998 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
08007614A |
Jan 1996 |
JPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
PCTIB9800219 |
Feb 1998 |
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