US 7,828,993 B2Granted

Phosphor and optical device using same

AssigneesTovoda Gosei Co.. Ltd., Gundula Roth, Walter Tews

InventorsGundula Roth, Walter Tews

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Abstract

A phosphor for converting ultraviolet light or blue light emitted from a light emitting element into a visible white radiation having a high level of color rendering properties, containing a light emitting component prepared from a solid system of an alkaline earth metal antimonate and a system derived from the solid system and exhibiting intrinsic photoemission, such as a fluoroantimonate, a light emitting component prepared from a manganese(IV)-activated antimonate, a titanate, silicate-germanate, and an aluminate, a light emitting component prepared from a europium-activated silicate-germanate or from a system containing a sensitizer selected from a group consisting of europium (II) and manganese (II) as a secondary activator and having an orange color or a dark red color in the spectrum range over 600 nm, or a light emitting component composed of a mixture of eight or less light emitting components having different emission bands and brought to a state of continuous emission of about 380 to 780 nm exhibiting a color temperature of about 10,000 to 6,500 K and a color temperature of about 3,000 to 2,000 K by virtue of the superposition of the light emitting bands.

Claims17

Dependent claims

A phosphor mixture for converting ultraviolet light or blue light emitted from a light emitting element into a visible white radiation, comprising:

a first phosphor selected from a group consisting of an alkaline earth metal antimonate comprising a fluoroantimonate, and a derivative of the alkaline earth metal antimonate comprising a fluoroantimonate;
and
a second phosphor selected from a group consisting of a manganese(IV)-activated compound comprising an antimonate, a manganese (IV)-activated compound comprising a silicate-germinate, and a manganese(IV)-activated compound comprising an aluminate;
and
a third phosphor selected from a group consisting of a europium-activated silicate-germanate, and a sensitizer selected from a group consisting of Eu(II) and Mn(II) as a second activator and having an orange color, an orange-red color, or a dark red color in a spectrum range over 600 nm,
wherein the third phosphor is represented by general formula
MeIxMeIIy(B,Si,P)aOnXm:Eu,Mn,
wherein
MeI comprises at least one element selected from group II and group III metals of the Periodic Table and/or at least one lanthanide ion selected from the group consisting of Eu, Pr, Sm, Gd, Dy, and Ce,
MeII comprises at least one monovalent cation,
X comprises Cl, F, or Br,
0≦x≦10,
0≦y≦12,
0<a≦6,
0<n≦24,
0≦m≦16, and
B may be completely or partially replaced with P, Si, Ga, or Al and may be partially replaced with V, Nb, Ta, Ge, W, or Mo, and
wherein the phosphor mixture has different emission bands that is brought to a state of broad continuous emission of about 380 to 780 nm, the phosphor mixture having a color temperature of about 10,000 K with blue-white color to 6,500 K with daylight color and having a color temperature of about 3,000 K with warm white color to 2,000 K with twilight color of reddish yellow by virtue of the superposition of the emission band.

15 more elements

An optical device, comprising:

a phosphor mixture adapted to be excited to emit light based on light emitted from an LED element,
wherein the phosphor mixture comprises:
a first phophor selected from a group consisting of an alkaline earth metal antimonate comprising a fluoroantimonate and a derivative of the alkaline earth metal antimonate comprising a fluoroantimonate;
and
a second phosphor selected from a group consisting of a manganese(IV)-activated compound comprising an antimonate, a manganese (IV)-activated compound comprising a titanate, a manganese (IV)-activated compound comprising a silicate-germanate, and a manganese (IV)-activated compound comprising an aluminate;
and
a third phosphor selected from a group consisting of a europium-activated silicate-germanate and a sensitizer selected from a croup consisting of Eu(II) and Mn(II) as a secondary activator and having an orange color an orange-red color a red color, or a dark red color in a spectrum range over 600 nm,
wherein the third phosphor is represented by general formula
MeIxMeIIy(B,Si,P)aOnXm:Eu,Mn,
wherein
MeI comprises at least one element selected from group II and group III metals of the Periodic Table and/or at least one lanthanide ion selected from the group consisting of Eu, Pr, Sm, Gd, Dy, and Ce,
MeII comprises at least one monovalent cation,
X comprises Cl, F, or Br,
0≦x≦10,
0≦y≦12,
0<a≦6,
0<n≦24,
0≦m≦16, and
B may be completely or partially replaced with P, Si, Ga, or Al and may be partially replaced with V, Nb, Ge, W, or Mo, and
wherein the phosphor, mixture has different emission bands that is brought to a state of bread continuous emission of about 380 to 780 nm, the phosphor mixture having a color temperature of about 10,000 K with blue-white color to 6,500 K with daylight color and having a color temperature of about 3,000 K with warm white color to 2,000 K with twilight color of reddish yellow by virtue of the superposition of the emission band.

17 more elements

An optical device, comprising:

an LED element;
a power feeding part for mounting said LED element thereon and feeding power to said LED element;
a light transparent sealing part for sealing said LED element and said power feeding part integrally with each other;
and
a phosphor mixture for emitting light upon excitation based on light emitted from said LED element,
wherein the phosphor mixture comprises:
a first phosphor selected from a group consisting of an alkaline earth metal antimonate comprising a fluoroantimonate and a derivative of the alkaline earth metal antimonate comprising a fluoroantimonate;
and
a second phosphor selected from a group consisting of manganese(IV)-activated compound comprising an antimonate, a manganese(IV)-activated compound comprising a titanate, a manganese(IV)-activated compound comprising a silicate-germanate, and a manganese(IV)-activated compound comprising an aluminate;
and
a third phosphor selected from a group consisting of a europium-activated silicate-germanate and a sensitizer selected from a group consisting of Eu(II) and Mn(II) as a secondary activator and having an orange color, an orange-red color, a red color, or a dark red color in the spectrum range over 600 nm,
wherein the third phosphor is represented by general formula:
MeIxMeIIy(B,Si,P)aOnXm:Eu,Mn,
wherein
MeI comprises at least one element selected from group II and group III metals of the Periodic Table and/or, at least one lanthanide ion selected from the group consisting of Eu, Pr, Sm, Gd, Dy, and Ce,
MeII comprises at least one monovalent cation,
X comprises Cl, F, or Br,
0≦x≦10,
0≦y≦12,
0<a≦6,
0<n≦24,
0≦m≦16, and
B may be completely or partially replaced with P, Si, Ga, or Al and may be partially replaced with V, Nb, Ta, Ge, W, or Mo, and
wherein, the phosphor mixture has different emission bands that is brought to a state of broad continuous emission of about 380 to 780 nm, the phosphor mixture having a color temperature of about 10,000 K with blue-white color to 6,500 K with daylight color and having a color temperature of about 3,000 K with warm white color to 2,000 K with twilight color of reddish yellow by virtue of the superposition of the emission band.

21 more elements

An optical device, comprising:

an LED lamp;
a light guiding part for guiding light emitted from said LED lamp;
a phosphor mixture for emitting light upon excitation based on light guided through said light guiding part;
and
a part to be lighted based on light emitted through said phosphor mixture,
wherein said phosphor mixture consists of:
a first phosphor selected from a group consisting of:
an alkaline earth metal antimonate comprising a fluoroantimonate or a derivative of the alkaline earth metal antimonate comprising a fluoroantimonate;
and
a second phosphor selected from a group consisting of a manganese(IV)-activated compound consisting of an antimonate, a manganese(IV)-activated compound consisting of a titanate, a manganese(IV)-activated compound consisting of a silicate-germanate, and a manganese(IV)-activated compound consisting of an aluminate;
and
a third phosphor selected from a group consisting of a europium-activated silicate-germanate and a sensitizer selected from a group consisting of Eu(II), and Mn(II) as a secondary activator and having an orange color, an orange-red color, a red color, or a dark red color in the spectrum range over 600 nm,
wherein the third phosphor is represented by general formula:
MeIxMeIIy(B,Si,P)aOnXm:Eu,Mn,
wherein
MeI comprises at least one element selected from group II and group III metals of the Periodic Table and/or at least one lanthanide ion selected from the group consisting of Eu, Pr, Sm, Gd, Dy, and Ce,
MeII comprises at least one monovalent cation,
X comprises Cl, F, or Br,
0≦x≦10,
0≦y≦12,
0<a≦6,
0<n≦24,
0≦m≦16, and
B may be completely or partially replaced with P, Si, Ga, or Al and may be partially replaced with V, Nb, Ta, Ge, W, or Mo, and
wherein the phosphor mixture has different emission bands that is brought to a state of broad continuous emission of about 380 to 780 nm, the phosphor mixture having a color temperature of about 10,000 K with blue-white color to 6,500 K with daylight color and having a color temperature of about 3,000 K with warm white color to 2,000 K with twilight color of reddish yellow by virtue of the superposition of the emission hand.

22 more elements

Dependencies are inferred from the claim text.