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US 8,089,084 B2Granted
Light emitting device
AssigneeSeoul Semiconductor Co., Ltd.
InventorsGundula Roth, Walter Tews, Chung Hoon Lee
Life of this patent
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Abstract
A light emitting device can be characterized as including a light emitting diode configured to emit light and a phosphor configured to change a wavelength of the light. The phosphor substantially covers at least a portion of the light emitting diode. The phosphor includes a compound having a host material. Divalent copper ions and oxygen are components of the host material.
Claims33
A light emitting device, comprising:
- a light emitting diode configured to emit light;
- and
- a phosphor configured to change a wavelength of the light emitted from the light emitting diode, the phosphor covering at least a portion of the light emitting diode;
- wherein said phosphor comprises a compound including a host material and an activator, wherein divalent copper ions and oxygen are components of the host material,
- wherein the compound has the formula
- a(M′O)b(M″O)c(Al2O3)d(M′″2O3)e(M″″O2)f(M′″″xOy)
- wherein
- M′ is Cu, or a combination of Cu and Pb;
- M″ is Be, Mg, Ca, Sr, Ba, Zn, Cd, Mn, or any combination thereof;
- M′″ is B, Ga, In, or any combination thereof;
- M″″ is Si, Ge, Ti, Zr, Hf, or any combination thereof;
- M′″″ is Bi, Sn, Sb, Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or any combination thereof;
- 0<a≦1;
- 0≦b≦2;
- 0<c≦8;
- 0≦d≦1;
- 0≦e≦1;
- 0<f≦2;
- 1≦x≦2;
- and
- 1≦y≦5.
18 more elements
A light emitting device, comprising:
- a light emitting diode configured to emit light;
- and
- a phosphor configured to change a wavelength of the light emitted from the light emitting diode, the phosphor covering at least a portion of the light emitting diode;
- wherein said phosphor comprises a compound including a host material and an activator,
- wherein divalent copper ions and oxygen are components of the host material,
- wherein the compound has the formula
- a(M′O)b(M″2O)c(M″X)d(GeO2)e(M′″O)f(M″″2O3)g(M′″″oOp)h(M″″″xOy)
- wherein
- M′ is Cu, or a combination of Cu and Pb;
- M″ is Li, Na, K, Rb, Cs, Au, Ag, or any combination thereof;
- M′″ is Be, Mg, Ca, Sr, Ba, Zn, Cd, or any combination thereof;
- M″″ is Sc, Y, B, Al, La, Ga, In, or any combination thereof;
- M′″″ is Si, Ti, Zr, Mn, V, Nb, Ta, W, Mo, or any combination thereof;
- M″″″ is Bi, Sn, Pr, Sm, Eu, Gd, Dy, or any combination thereof;
- X is F, CI, Br, I, or any combination thereof;
- 0<a≦2;
- 0≦b≦2;
- 0≦c≦10;
- 0<d≦10;
- 0≦e≦14;
- 0≦f≦14;
- 0≦g≦10;
- 0≦h≦2;
- 1≦o≦2;
- 1≦p≦5;
- 1≦x≦2;
- and
- 1≦y≦5, and
- wherein the divalent copper ions are not activators.
26 more elements
A light emitting device, comprising:
- a light emitting diode configured to emit light;
- and
- a phosphor configured to change a wavelength of the light emitted from the light emitting diode, the phosphor covering at least a portion of the light emitting diode;
- wherein said phosphor comprises a compound including a host material and an activator,
- wherein divalent copper ions and oxygen are components of the host material,
- wherein the compound has the formula
- a(M′O)b(M″2O)c(M″X)d(P2O5)e(M′″O)f(M″″2O3)g(M′″″O2)h(M″″″xOy)
- wherein
- M′ is Cu, or a combination of Cu and Pb;
- M″ is Li, Na, K, Rb, Cs, Au, Ag, or any combination thereof,
- M′″ is Be, Mg, Ca, Sr, Ba, Zn, Cd, Mn, or any combination thereof,
- M″″ is Sc, Y, B, Al, La, Ga, In, or any combination thereof,
- M′″″ is Si, Ge, Ti, Zr, Hf, V, Nb, Ta, W, Mo, or any combination thereof,
- M″″″ is Bi, Sn, Pr, Sm, Eu, Gd, Dy, Ce, Tb, or any combination thereof,
- X is F, CI, Br, I, or any combination thereof,
- 0<a≦2;
- 0≦b≦12;
- 0≦c≦16;
- 0<d≦3;
- 0≦e≦5;
- 0≦f≦3;
- 0≦g≦2;
- 0<h≦2;
- 1≦x≦2;
- and
- 1≦y≦5.
23 more elements
Dependencies are inferred from the claim text.