Light-emitting device

Disclosed is a light-emitting device (1) including a light-emitting element (2) emitting primary light, and a light converter (3) absorbing a part of the primary light emitted from the light-emitting element (2) and emitting secondary light having a longer wavelength than the primary light. The light converter (3) contains a green light-emitting phosphor (4) and a red light-emitting phosphor (5). The green light-emitting phosphor (4) is composed of at least one phosphor selected from a divalent europium-activated oxynitride phosphor substantially represented by the following formula: EuaSibAlcOdNe and a divalent europium-activated silicate phosphor substantially represented by the following formula: 2(Ba1-f-gMIfEug)O.SiO2, while the red light-emitting phosphor (5) is composed of at least one phosphor selected from tetravalent manganese-activated fluoro-tetravalent metalate phosphors substantially represented by the following formulae: MII2(MIII1-hMnh)F6 and/or MIV(MIII1-hMnh)F6. Consequently ...

PHOSPHOR, LIGHT EMITTING APPARATUS, AND LIQUID CRYSTAL DISPLAY APPARATUS USING THE SAME

A phosphor as a divalent europium-activated oxynitride green light emitting phosphor which is a β-type SiAlON substantially represented by a general formula (A): EuSiAlON(where a, b, c, d, and e are numbers satisfying 0.005≦a≦0.4, b+c=12, and d+e=16), and having an average particle size (d1) (determined by an air permeability method) of 9 to 16 μm, a median diameter (50% D) in particle size distribution of 12.5 to 35 μm, 50% D/d of 1.4 to 2.2, and an absorptance at 600 nm of not more than 8.0%, and a light emitting apparatus, a BL light source apparatus, and a liquid crystal display device using the same are provided, to provide a light emitting apparatus with a high efficiency and a stable characteristic and a liquid crystal display apparatus using the same by using the β-type SiAlON having controlled dispersibility and improved transparency. 1. A divalent europium-activated oxynitride green light emitting phosphor which is a β-type SiAlON substantially represented by a general formula (A):{'br': None, 'sub': a', 'b', 'c', 'd', 'e, 'EuSiAlON(where a, b, c, d, and e are numbers satisfying 0.005≦a≦0.4, b+c=12, and d+e=16), and having an average particle size (d1) (determined by an air permeability method) of 9 to 16 μm, a median diameter (50% D) in particle size distribution of 12.5 to 35 μm, and 50% D/d1 of 1.4 to 2.2.'}2. The phosphor according to claim 13 , having d1 satisfying 10 μm≦d1≦13 μm claim 13 , 50% D/d1 of 1.6 to 2.0 claim 13 , and an absorptance at 600 nm of not more than 7.0%.3. The phosphor according to claim 13 , wherein “c” satisfies c≦0.3 in the general formula (A).4. The phosphor according to claim 13 , wherein “a” satisfies 0.01≦a≦0.2 in the general formula (A).5. A light emitting apparatus claim 13 , comprising:a light emitting element which is a gallium nitride-based semiconductor emitting primary light having a peak wavelength of 430 to 480 nm; anda light converter absorbing a part of said primary light to emit secondary light having a ...

Phosphor, method of producing the same, and light emitting apparatus

There are provided a phosphor which is a divalent europium-activated oxynitride phosphor substantially represented by General formula (A): Eu a Si b Al c O d N e , a divalent europium-activated oxynitride phosphor substantially represented by General formula (B): MI f Eu g Si h Al k O m N n or a divalent europium-activated nitride phosphor substantially represented by General formula (C): (MII 1-p Eu p )MIIISiN 3 , having a reflectance of light emission in a longer wavelength region of visible light than a peak wavelength of 95% or larger, and a method of producing such phosphor; a nitride phosphor and an oxynitride phosphor which emit light efficiently and stably by the light having a wavelength ranging from 430 to 480 nm from a semiconductor light emitting device by means of a light emitting apparatus using such phosphor, and a producing method of such phosphor; and a light emitting apparatus having stable characteristics and realizing high efficiency.

Phosphor, method of producing the same, and light emitting apparatus

There are provided a phosphor which is a divalent europium-activated oxynitride phosphor substantially represented by General formula (A): EuaSibAlcOdNe, a divalent europium-activated oxynitride phosphor substantially represented by General formula (B): MIfEugSihAlkOmNn or a divalent europium-activated nitride phosphor substantially represented by General formula (C): (MII1-pEup)MIIISiN3, having a reflectance of light emission in a longer wavelength region of visible light than a peak wavelength of 95% or larger, and a method of producing such phosphor; a nitride phosphor and an oxynitride phosphor which emit light efficiently and stably by the light having a wavelength ranging from 430 to 480 nm from a semiconductor light emitting device by means of a light emitting apparatus using such phosphor, and a producing method of such phosphor; and a light emitting apparatus having stable characteristics and realizing high efficiency.

Phosphor particle group and light emitting apparatus using the same

Provided is a phosphor particle group of divalent europium-activated oxynitride green light emitting phosphor particles each of which is a β-type SiAlON substantially represented by a general formula: EuaSibAlcOdNe, where 0.005≦a≦0.4, b+c=12, d+e=16, wherein 60% or more of the phosphor particle group is composed of the phosphor particles in which a value obtained by dividing a longer particle diameter by a shorter particle diameter is greater than 1.0 and not greater than 3.0. A high-efficiency and stable light emitting apparatus using a β-type SiAlON, which includes a light converter using the phosphor particle group, and a phosphor particle group therefor are also provided.

LIGHT-EMITTING DEVICE

Disclosed is a light-emitting device including a light-emitting element emitting primary light, and a light converter absorbing a part of the primary light emitted from the light-emitting element and emitting secondary light having a longer wavelength than the primary light. The light converter contains a green light-emitting phosphor and a red light-emitting phosphor. The green light-emitting phosphor is composed of at least one phosphor selected from a divalent europium-activated oxynitride phosphor substantially represented by the following formula: EuaSibAlcOdNe and a divalent europium-activated silicate phosphor substantially represented by the following formula: 2(Ba1-f-gMIfEug)O.SiO2, while the red light-emitting phosphor is composed of at least one phosphor selected from tetravalent manganese-activated fluoro-tetravalent metalate phosphors substantially represented by the following formulae: MII2(MIII1-hMnh)F6 and/or MIV(MIII1-hMnh)F6. Consequently, the light-emitting device has ...

Phosphor particle group and light emitting apparatus using the same

Provided is a phosphor particle group of divalent europium-activated oxynitride green light emitting phosphor particles each of which is a β-type SiAlON substantially represented by a general formula: EuaSibAlcOdNe, where 0.005≦a≦0.4, b+c=12, d+e=16, wherein 60% or more of the phosphor particle group is composed of the phosphor particles in which a value obtained by dividing a longer particle diameter by a shorter particle diameter is greater than 1.0 and not greater than 3.0. A high-efficiency and stable light emitting apparatus using a β-type SiAlON, which includes a light converter using the phosphor particle group, and a phosphor particle group therefor are also provided.

LIGHT-EMITTING DEVICE

Disclosed is a light-emitting device ( 1 ) including a light-emitting element ( 2 ) emitting primary light, and a light converter ( 3 ) absorbing a part of the primary light emitted from the light-emitting element ( 2 ) and emitting secondary light having a longer wavelength than the primary light. The light converter ( 3 ) contains a green light-emitting phosphor ( 4 ) and a red light-emitting phosphor ( 5 ). The green light-emitting phosphor ( 4 ) is composed of at least one phosphor selected from a divalent europium-activated oxynitride phosphor substantially represented by the following formula: Eu a Si b Al c O d N e and a divalent europium-activated silicate phosphor substantially represented by the following formula: 2(Ba 1-f-g MI f Eu g )O.SiO 2 , while the red light-emitting phosphor ( 5 ) is composed of at least one phosphor selected from tetravalent manganese-activated fluoro-tetravalent metalate phosphors substantially represented by the following formulae: MII 2 (MIII 1-h Mn h )F 6 and/or MIV(MIII 1-h Mn h )F 6 . Consequently, the light-emitting device ( 1 ) has excellent color gamut (NTSC ratio).

LIGHT-EMITTING DEVICE

Disclosed is a light-emitting device () including a light-emitting element () emitting primary light, and a light converter () absorbing a part of the primary light emitted from the light-emitting element () and emitting secondary light having a longer wavelength than the primary light. The light converter () contains a green light-emitting phosphor () and a red light-emitting phosphor (). The green light-emitting phosphor () is composed of at least one phosphor selected from a divalent europium-activated oxynitride phosphor substantially represented by the following formula: EuSiAlONand a divalent europium-activated silicate phosphor substantially represented by the following formula: 2(BaMIEu)O.SiO, while the red light-emitting phosphor () is composed of at least one phosphor selected from tetravalent manganese-activated fluoro-tetravalent metalate phosphors substantially represented by the following formulae: MII(MIIIMn)Fand/or MIV(MIIIMn)F. Consequently, the light-emitting device () has excellent color gamut (NTSC ratio). 1. A light-emitting device comprising:a light-emitting element for generating a primary light having a peak wavelength of 430 to 480 nm; and a first phosphor composed of manganese, potassium, fluorine and a tetravalent metal element selected from Ge, Si, Sn, Ti and Zr,', 'a second phosphor composed of europium, silicon, aluminum, oxygen and nitrogen, a weight ratio of the second phosphor relative to the first phosphor being 5 to 70%, and', 'an additive composed of silicon oxide., 'a silicone resin covering said light-emitting element and including2. The light-emitting device of claim 1 , whereinsaid light-emitting element is located on a bottom of a recess of the light-emitting device, andthe first and second phosphor in said silicone resin are provided in the recess.3. The light-emitting device comprising:a light-emitting element for generating a primary light having a peak wavelength of 430 to 480 nm; and a first phosphor composed of ...

Phosphor, method of producing the same, and light emitting apparatus

There are provided a phosphor which is a divalent europium-activated oxynitride phosphor substantially represented by General formula (A): EuaSibAlcOdNe, a divalent europium-activated oxynitride phosphor substantially represented by General formula (B): MIfEugSihAlkOmNn or a divalent europium-activated nitride phosphor substantially represented by General formula (C): (MIIl-pEup)MIIISiN3, having a reflectance of light emission in a longer wavelength region of visible light than a peak wavelength of 95% or larger, and a method of producing such phosphor; a nitride phosphor and an oxynitride phosphor which emit light efficiently and stably by the light having a wavelength ranging from 430 to 480 nm from a semiconductor light emitting device by means of a light emitting apparatus using such phosphor, and a producing method of such phosphor; and a light emitting apparatus having stable characteristics and realizing high efficiency.

Light-emitting device

Disclosed is a light-emitting device including a light-emitting element emitting primary light, and a light converter absorbing a part of the primary light emitted from the light-emitting element and emitting secondary light having a longer wavelength than the primary light. The light converter contains a green light-emitting phosphor and a red light-emitting phosphor. The green light-emitting phosphor is composed of at least one phosphor selected from a divalent europium-activated oxynitride phosphor substantially represented by the following formula: EuaSibAlcOdNe and a divalent europium-activated silicate phosphor substantially represented by the following formula: 2 (Ba1-f-gMIfEug)O.SiO2, while the red light-emitting phosphor is composed of at least one phosphor selected from tetravalent manganese-activated fluoro-tetravalent metalate phosphors substantially represented by the following formulae: MII2(MIII1-hMnh)F6 and/or MIV(MIII1-hMnh)F6. Consequently, the light-emitting device has ...

PHOSPHOR PARTICLE GROUP AND LIGHT EMITTING APPARATUS USING THE SAME

Provided is a phosphor particle group of divalent europium-activated oxynitride green light emitting phosphor particles each of which is a β-type SiAlON substantially represented by a general formula: EuaSibAlcOdNe, where 0.005≦a≦0.4, b+c=12, d+e=16, wherein 60% or more of the phosphor particle group is composed of the phosphor particles in which a value obtained by dividing a longer particle diameter by a shorter particle diameter is greater than 1.0 and not greater than 3.0. A high-efficiency and stable light emitting apparatus using a β-type SiAlON, which includes a light converter using the phosphor particle group, and a phosphor particle group therefor are also provided.

Light-emitting device

Disclosed is a light-emitting device including a light-emitting element emitting primary light, and a light converter absorbing a part of the primary light emitted from the light-emitting element and emitting secondary light having a longer wavelength than the primary light. The light converter contains a green light-emitting phosphor and a red light-emitting phosphor. The green light-emitting phosphor is composed of at least one phosphor selected from a divalent europium-activated oxynitride phosphor substantially represented by the following formula: EuaSibAlcOdNe and a divalent europium-activated silicate phosphor substantially represented by the following formula: 2(Ba1-f-gMIfEug)O.SiO2, while the red light-emitting phosphor is composed of at least one phosphor selected from tetravalent manganese-activated fluoro-tetravalent metalate phosphors substantially represented by the following formulae: MII2(MIII1-hMnh)F6 and/or MIV(MIII1-hMnh)F6. Consequently, the light-emitting device has ...

LIQUID CRYSTAL DISPLAY

A liquid crystal display including a backlight and a filter, the backlight including a light-emitting device having a light-emitting element emitting blue light, and a green phosphor and a red phosphor absorbing a part of primary light emitted from the light-emitting element and emitting first secondary light and second secondary light, respectively, the green phosphor being a β-type SiAlON phosphor containing Eu and Al dissolved in a crystal of a nitride or an oxynitride having a β-type Si 3 N 4 crystal structure, and the filter including filters for colors of red (R), green (G), blue (B) and yellow (Y), respectively, arranged in a plane for subpixels provided in each pixel of the liquid crystal display, which attains excellent color reproducibility (NTSC ratio) and high luminance, can be provided.

Phosphor particle group and light emitting apparatus using the same

Provided is a phosphor particle group of divalent europium-activated oxynitride green light emitting phosphor particles each of which is a β-type SiAlON substantially represented by a general formula: EuaSibAlcOdNe, where 0.005≦a≦0.4, b+c=12, d+e=16, wherein 60% or more of the phosphor particle group is composed of the phosphor particles in which a value obtained by dividing a longer particle diameter by a shorter particle diameter is greater than 1.0 and not greater than 3.0. A high-efficiency and stable light emitting apparatus using a β-type SiAlON, which includes a light converter using the phosphor particle group, and a phosphor particle group therefor are also provided.

Phosphor, light emitting apparatus, and liquid crystal display apparatus using the same

A phosphor as a divalent europium-activated oxynitride green light emitting phosphor which is a β-type SiAlON substantially represented by a general formula (A): Eu a Si b Al c O d N e (where a, b, c, d, and e are numbers satisfying 0.005≦a≦0.4, b+c=12, and d+e=16), and having an average particle size (d1) (determined by an air permeability method) of 9 to 16 μm, a median diameter (50% D) in particle size distribution of 12.5 to 35 μm, 50% D/d1 of 1.4 to 2.2, and an absorptance at 600 nm of not more than 8.0%, and a light emitting apparatus, a BL light source apparatus, and a liquid crystal display device using the same are provided, to provide a light emitting apparatus with a high efficiency and a stable characteristic and a liquid crystal display apparatus using the same by using the β-type SiAlON having controlled dispersibility and improved transparency.

Phosphor, method of producing the same, and light emitting apparatus

There are provided a phosphor which is a divalent europium-activated oxynitride phosphor substantially represented by General formula (A): Eu a Si b Al c O d N e , a divalent europium-activated oxynitride phosphor substantially represented by General formula (B): MI f Eu g Si h Al k O m N n or a divalent europium-activated nitride phosphor substantially represented by General formula (C): (MII 1-p Eu p )MIIISiN 3 , having a reflectance of light emission in a longer wavelength region of visible light than a peak wavelength of 95% or larger, and a method of producing such phosphor; a nitride phosphor and an oxynitride phosphor which emit light efficiently and stably by the light having a wavelength ranging from 430 to 480 nm from a semiconductor light emitting device by means of a light emitting apparatus using such phosphor, and a producing method of such phosphor; and a light emitting apparatus having stable characteristics and realizing high efficiency.

Light-emitting device

Disclosed is a light-emitting device (1) including a light-emitting element (2) emitting primary light, and a light converter (3) absorbing a part of the primary light emitted from the light-emitting element (2) and emitting secondary light having a longer wavelength than the primary light. The light converter (3) contains a green light-emitting phosphor (4) and a red light-emitting phosphor (5). The green light-emitting phosphor (4) is composed of at least one phosphor selected from a divalent europium-activated oxynitride phosphor substantially represented by the following formula: EuaSibAlcOdNe and a divalent europium-activated silicate phosphor substantially represented by the following formula: 2(Ba1-f-gMIfEug)O.SiO2, while the red light-emitting phosphor (5) is composed of at least one phosphor selected from tetravalent manganese-activated fluoro-tetravalent metalate phosphors substantially represented by the following formulae: MII2(MIII1-hMnh)F6 and/or MIV(MIII1-hMnh)F6. Consequently ...

GROUP OF PHOSPHOR PARTICLES, LIGHT-EMITTING DEVICE USING SAME, AND LIQUID CRYSTAL TELEVISION RECEIVER

Provided is a phosphor particle group of divalent europium-activated oxynitride green light emitting phosphor particles () each of which is a β-type SiAlON represented by a general formula: EuSiAlON, where 0.005≦a≦0.4, b+c=12, d+e=16, wherein a mean value of a value obtained by dividing a longer particle diameter by a shorter particle diameter is not greater than 1.75. Also provided are a light emitting apparatus () using the phosphor particle group in a light converter (), and a liquid crystal display television using the light emitting apparatus (). With these, a high-efficiency and stable light emitting apparatus using a β-type SiAlON, and a phosphor particle group therefor are provided. 11. A phosphor particle group of divalent europium-activated oxynitride green light emitting phosphor particles () each of which is a β-type SiAlON represented by a general formula (I): EuSiAlON , where 0.005≦a≦0.4 , b+c=12 , d+e=16 , wherein a mean value of a value obtained by dividing a longer particle diameter by a shorter particle diameter is not greater than 1.75.21. The phosphor particle group according to claim 1 , wherein the phosphor particles () in which a value obtained by dividing a longer particle diameter by a shorter particle diameter is greater than 1.0 and not greater than 2.0 constitute 60% or more of the whole phosphor particles.31. The phosphor particle group according to claim 1 , wherein the phosphor particles () in which a value obtained by dividing a longer particle diameter by a shorter particle diameter is greater than 1.0 and not greater than 2.0 constitute 80% or more of the whole phosphor particles.4. The phosphor particle group according to claim 1 , wherein c≧0.3 in the general formula (I).5. The phosphor particle group according to claim 1 , wherein 0.01≦a≦0.2 in the general formula (I).6. The phosphor particle group according to claim 1 , wherein the phosphor particle group has a median diameter in a range of 10-25 μm.7111213. A light emitting ...

GROUP OF PHOSPHOR PARTICLES FOR LIGHT-EMITTING DEVICE, LIGHT-EMITTING DEVICE AND BACKLIGHT FOR LIQUID CRYSTAL DISPLAY

A group of phosphor particles for a light-emitting device contains a plurality of types of phosphor particles having different emission peak wavelengths, while phosphor particles of a type having a relatively longer emission peak wavelength have a relatively larger median diameter as compared with phosphor particles of a type having a relatively shorter emission peak wavelength.

Phosphor, light emitting apparatus, and liquid crystal display apparatus using the same

A phosphor as a divalent europium-activated oxynitride green light emitting phosphor which is a -type SiAlON substantially represented by a general formula (A): EuaSibAlcOdNe (where a, b, c, d, and e are numbers satisfying 0.005a0.4, b+c=12, and d+e=16), and having an average particle size (d1) (determined by an air permeability method) of 9 to 16 m, a median diameter (50% D) in particle size distribution of 12.5 to 35 m, 50% D/d1 of 1.4 to 2.2, and an absorptance at 600 nm of not more than 8.0%, and a light emitting apparatus, a BL light source apparatus, and a liquid crystal display device using the same are provided, to provide a light emitting apparatus with a high efficiency and a stable characteristic and a liquid crystal display apparatus using the same by using the -type SiAlON having controlled dispersibility and improved transparency.

Phosphor particle group and light emitting apparatus using the same

Provided is a phosphor particle group of divalent europium-activated oxynitride green light emitting phosphor particles each of which is a -type SiAlON substantially represented by a general formula: EuaSibAlcOdNe, where 0.0055a0.4, b+c=12, d+e=16, wherein 60% or more of the phosphor particle group is composed of the phosphor particles in which a value obtained by dividing a longer particle diameter by a shorter particle diameter is greater than 1.0 and not greater than 3.0. A high-efficiency and stable light emitting apparatus using a -type SiAlON, which includes a light converter using the phosphor particle group, and a phosphor particle group therefor are also provided.

PHOSPHOR PARTICLE GROUP AND LIGHT EMITTING APPARATUS USING THE SAME

Provided is a phosphor particle group of divalent europium-activated oxynitride green light emitting phosphor particles each of which is a -type SiAlON substantially represented by a general formula: EuaSibAlcOdNe, where 0.0055a0.4, b+c=12, d+e=16, wherein 60% or more of the phosphor particle group is composed of the phosphor particles in which a value obtained by dividing a longer particle diameter by a shorter particle diameter is greater than 1.0 and not greater than 3.0. A high-efficiency and stable light emitting apparatus using a -type SiAlON, which includes a light converter using the phosphor particle group, and a phosphor particle group therefor are also provided.

Light-emitting device

Disclosed is a light-emitting device (1) including a light-emitting element (2) emitting primary light, and a light converter (3) absorbing a part of the primary light emitted from the light-emitting element (2) and emitting secondary light having a longer wavelength than the primary light. The light converter (3) contains a green light-emitting phosphor (4) and a red light-emitting phosphor (5). The green light-emitting phosphor (4) is composed of at least one phosphor selected from a divalent europium-activated oxynitride phosphor substantially represented by the following formula: EuaSibAlcOdNe and a divalent europium-activated silicate phosphor substantially represented by the following formula: 2(Ba1-f-gMIfEug)O.SiO2, while the red light-emitting phosphor (5) is composed of at least one phosphor selected from tetravalent manganese-activated fluoro-tetravalent metalate phosphors substantially represented by the following formulae: MII2(MIII1-hMnh)F6 and/or MIV(MIII1-hMnh)F6. Consequently ...

Group of phosphor particles for light-emitting device, light-emitting device and backlight for liquid crystal display

A group of phosphor particles for a light-emitting device contains a plurality of types of phosphor particles having different emission peak wavelengths, while phosphor particles of a type having a relatively longer emission peak wavelength have a relatively larger median diameter as compared with phosphor particles of a type having a relatively shorter emission peak wavelength.

Light-emitting device

Disclosed is a light-emitting device (1) including a light-emitting element (2) emitting primary light, and a light converter (3) absorbing a part of the primary light emitted from the light-emitting element (2) and emitting secondary light having a longer wavelength than the primary light. The light converter (3) contains a green light-emitting phosphor (4) and a red light-emitting phosphor (5). The green light-emitting phosphor (4) is composed of at least one phosphor selected from a divalent europium-activated oxynitride phosphor substantially represented by the following formula: EuaSibAlcOdNe and a divalent europium-activated silicate phosphor substantially represented by the following formula: 2(Ba1-f-gMIfEug)O.SiO2, while the red light-emitting phosphor (5) is composed of at least one phosphor selected from tetravalent manganese-activated fluoro-tetravalent metalate phosphors substantially represented by the following formulae: MII2(MIII1-hMnh)F6 and/or MIV(MIII1-hMnh)F6. Consequently ...

Light-emitting device

Disclosed is a light-emitting device ( 1 ) including a light-emitting element ( 2 ) emitting primary light, and a light converter ( 3 ) absorbing a part of the primary light emitted from the light-emitting element ( 2 ) and emitting secondary light having a longer wavelength than the primary light. The light converter ( 3 ) contains a green light-emitting phosphor ( 4 ) and a red light-emitting phosphor ( 5 ). The green light-emitting phosphor ( 4 ) is composed of at least one phosphor selected from a divalent europium-activated oxynitride phosphor substantially represented by the following formula: Eu a Si b Al c O d N e and a divalent europium-activated silicate phosphor substantially represented by the following formula: 2(Ba 1-f-g MI f Eu g )O.SiO 2 , while the red light-emitting phosphor ( 5 ) is composed of at least one phosphor selected from tetravalent manganese-activated fluoro-tetravalent metalate phosphors substantially represented by the following formulae: MII 2 (MIII 1-h Mn h )F 6 and/or MIV(MIII 1-h Mn h )F 6 . Consequently, the light-emitting device ( 1 ) has excellent color gamut (NTSC ratio).

RED LIGHT EMITTING PHOSPHOR, METHOD FOR MANUFACTURING THE SAME AND LIGHT EMITTING APPARATUS EMPLOYING RED LIGHT EMITTING PHOSPHOR

The present invention relates to a divalent europium-activated nitride red light emitting phosphor substantially represented by a general formula: (MIEu)MIISiN(1) (in the formula (1), MI is an alkaline-earth metal element and represents at least one element selected from the group consisting of Mg, Ca, Sr, and Ba; MII is a trivalent metal element and represents at least one element selected from the group consisting of Al, Ga, In, Sc, Y, La, Gd, and Lu; and x is the number satisfying 0.001≦x≦0.10), in which the electrical conductivity of a supernatant liquid of the solution containing 10 parts by mass of pure water with respect to 1 part by mass of the red light emitting phosphor is not more than 10 mS/cm. 1. A divalent europium-activated nitride red light emitting phosphor substantially represented by {'br': None, 'sub': 1-x', 'x', '3, '(MIEu)MIISiN\u2003\u2003(1)'}, 'a general formula(in the formula (1), MI is an alkaline-earth metal element and represents at least one element selected from the group consisting of Mg, Ca, Sr, and Ba; MII is a trivalent metal element and represents at least one element selected from the group consisting of Al, Ga, In, Sc, Y, La, Gd, and Lu; and x is a number satisfying 0.001≦x≦0.10), whereinelectrical conductivity of a supernatant liquid of a solution containing 10 parts by mass of pure water with respect to 1 part by mass of said red light emitting phosphor is not more than 10mS/cm.2. The red light emitting phosphor according to claim 1 , wherein claim 1 , in said general formula (1) claim 1 , MII is at least one element selected from the group consisting of Al claim 1 , Ga and In.3. A light emitting apparatus comprising:a light emitting element of a gallium nitride-based semiconductor emitting primary light having a peak wavelength of 430 to 480 nm; anda light converter absorbing a part of said primary light and emitting secondary light having a wavelength longer than a wavelength of said primary light, wherein {'br': None, 'sub ...

LIGHT-EMITTING DEVICE

Disclosed is a light-emitting device () including a light-emitting element () emitting primary light, and a light converter () absorbing a part of the primary light emitted from the light-emitting element () and emitting secondary light having a longer wavelength than the primary light. The light converter () contains a green light-emitting phosphor () and a red light-emitting phosphor (). The green light-emitting phosphor () is composed of at least one phosphor selected from a divalent europium-activated oxynitride phosphor substantially represented by the following formula: EuSiAlONand a divalent europium-activated silicate phosphor substantially represented by the following formula: 2(BaMIEu)O.SiO, while the red light-emitting phosphor () is composed of at least one phosphor selected from tetravalent manganese-activated fluoro-tetravalent metalate phosphors substantially represented by the following formulae: MII(MIIIMn)Fand/or MIV(MIIIMn)F. Consequently, the light-emitting device () has excellent color gamut (NTSC ratio). 1. A light-emitting device comprising a light-emitting element emitting primary light , and a light converter absorbing a part of the primary light emitted from the light-emitting element and emitting secondary light having a longer wavelength than the primary light , said light converter including a green light-emitting phosphor and a red light-emitting phosphor , [{'sub': 2', '1-h', 'b', '6, 'a tetravalent manganese-activated fluoro-tetravalent metalate phosphor substantially represented by a general formula (C): MII(MIIIMn)F(in said general formula (C), MII represents at least one alkaline metal element selected from Li, Na, K, Rb and Cs, MIII represents at least one tetravalent metal element selected from Ge, Si, Sn, Ti and Zr, and 0.001≦h≦0.1), and'}, {'sub': 1-h', 'h', '6, 'a tetravalent manganese-activated fluoro-tetravalent metalate phosphor substantially represented by a general formula (D): MIV(MIIIMn)F(in said general formula (D), ...

Phosphor particle group, light emitting apparatus using the same, and liquid crystal display television

Provided is a phosphor particle group of divalent europium-activated oxynitride green light emitting phosphor particles each of which is a -type SiAlON represented by a general formula: EuaSibAlcOdNe, where 0.005a0.4, b+c=12, d+e=16, wherein a mean value of a value obtained by dividing a longer particle diameter by a shorter particle diameter is not greater than 1.75. Also provided are a light emitting apparatus using the phosphor particle group in a light converter, and a liquid crystal display television using the light emitting apparatus. With these, a high-efficiency and stable light emitting apparatus using a -type SiAlON, and a phosphor particle group therefor are provided.

Phosphor, Method of Producing the Same, and Light Emitting Apparatus

There are provided a phosphor which is a divalent europium-activated oxynitride phosphor substantially represented by General formula (A): EuSiAlON, a divalent europium-activated oxynitride phosphor substantially represented by General formula (B): MIEuSiAlONor a divalent europium-activated nitride phosphor substantially represented by General formula (C): (MIIEu)MIIISiN, having a reflectance of light emission in a longer wavelength region of visible light than a peak wavelength of 95% or larger, and a method of producing such phosphor; a nitride phosphor and an oxynitride phosphor which emit light efficiently and stably by the light having a wavelength ranging from 430 to 480 nm from a semiconductor light emitting device by means of a light emitting apparatus using such phosphor, and a producing method of such phosphor; and a light emitting apparatus having stable characteristics and realizing high efficiency. 1. A phosphor comprising a yellow emitting phosphor having an α-SiAlON crystal structure comprising Eu , Si , Al , O , N , and at least one element selected from the group consisting of Li , Na , K , Cs , Mg , Ca , Sr , and Ba ,wherein the yellow emitting phosphor has a reflectance of 95% or larger in a region of visible light having wavelengths longer than a peak wavelength of the yellow emitting phosphor, andwherein the yellow emitting phosphor has an average particle diameter from 2 micrometers to 8 micrometers.2. A light converter claim 1 , comprising the phosphor of .3. A light emitting apparatus comprising:a light emitting device that emits primary light; and{'claim-ref': {'@idref': 'CLM-00002', 'claim 2'}, 'the light converter of .'}4. The light emitting apparatus according to claim 3 , wherein the light emitting device is a gallium nitride-based semiconductor device claim 3 , and primary light from the light-emitting device has a wavelength ranging from 430 to 480 nm.5. A liquid crystal display comprising a backlight source comprising the light ...

PHOSPHOR, METHOD OF PRODUCING THE SAME, AND LIGHT EMITTING APPARATUS

There are provided a phosphor which is a divalent europium-activated oxynitride phosphor substantially represented by General formula (A): EuSiAlON, a divalent europium-activated oxynitride phosphor substantially represented by General formula (B): MIEuSiAlONor a divalent europium-activated nitride phosphor substantially represented by General formula (C): (MIIEu)MIIISiN, having a reflectance of light emission in a longer wavelength region of visible light than a peak wavelength of 95% or larger, and a method of producing such phosphor; a nitride phosphor and an oxynitride phosphor which emit light efficiently and stably by the light having a wavelength ranging from 430 to 480 nm from a semiconductor light emitting device by means of a light emitting apparatus using such phosphor, and a producing method of such phosphor; and a light emitting apparatus having stable characteristics and realizing high efficiency. 110-. (canceled)11. A phosphor , wherein reflectance of light emission in a longer wavelength region of visible light than a peak wavelength is 95% or larger , comprising:{'sub': 1-p', 'p', 'i', '3, 'a divalent europium-activated nitride phosphor substantially represented by General formula (C): (MIIEu)MIIISN,'}wherein MII is an alkaline earth metal element and represents at least one kind of element selected from Mg, Ca, Sr and Ba, and MIII comprises a trivalent metal element, and represents at least one kind of element selected from Al, Ga, In, Sc, Y, La, Gd and Lu, and 0.001≦p≦0.05 is satisfied.12. The phosphor according to claim 11 , wherein the phosphor is a divalent europium-activated nitride phosphor substantially represented by the General formula (C) claim 11 , and in the General formula (C) claim 11 , MIII is at least one kind of element selected from Al claim 11 , Ga and In.13. A method of producing the phosphor of claim 11 , comprising the step of mixing aluminum nitride covered with fine particle silicon dioxide into a material for the phosphor. ...

LIGHT-EMITTING DEVICE

Disclosed is a light-emitting device () including a light-emitting element () emitting primary light, and a light converter () absorbing a part of the primary light emitted from the light-emitting element () and emitting secondary light having a longer wavelength than the primary light. The light converter () contains a green light-emitting phosphor () and a red light-emitting phosphor (). The green light-emitting phosphor () is composed of at least one phosphor selected from a divalent europium-activated oxynitride phosphor substantially represented by the following formula: EuSiAlONand a divalent europium-activated silicate phosphor substantially represented by the following formula: 2(BaMIEu)O.SiO, while the red light-emitting phosphor () is composed of at least one phosphor selected from tetravalent manganese-activated fluoro-tetravalent metalate phosphors substantially represented by the following formulae: MII(MIIIMn)Fand/or MIV(MIIIMn)F. Consequently, the light-emitting device () has excellent color gamut (NTSC ratio). 1. A light-emitting device comprising:a light-emitting element for generating a primary light having a peak wavelength of 430 to 480 nm; and a first phosphor composed of manganese, potassium, fluorine and a tetravalent metal element selected from Ge, Si, Sn, Ti and Zr, a light emitted from said light-emitting device having a spectrum with a red peak wavelength caused by the first phosphor and a blue peak wavelength caused by said light-emitting element, an intensity of the red peak wavelength being larger than an intensity of the blue peak wavelength, and', 'a second phosphor composed of europium, silicon, aluminum, oxygen and nitrogen, the spectrum of the light emitted from said light-emitting device having a green peak wavelength caused by the second phosphor, the intensity of the blue peak wavelength being larger than twice an intensity of the green peak wavelength., 'a silicone resin covering said light-emitting element and including2. The ...

Phosphor, Method of Producing the Same, and Light Emitting Apparatus

There are provided a phosphor which is a divalent europium-activated oxynitride phosphor substantially represented by General formula (A): EuSiAlON, a divalent europium-activated oxynitride phosphor substantially represented by General formula (B): MIEuSiAlONor a divalent europium-activated nitride phosphor substantially represented by General formula (C): (MIIEu)MIIISiN, having a reflectance of light emission in a longer wavelength region of visible light than a peak wavelength of 95% or larger, and a method of producing such phosphor; a nitride phosphor and an oxynitride phosphor which emit light efficiently and stably by the light having a wavelength ranging from 430 to 480 nm from a semiconductor light emitting device by means of a light emitting apparatus using such phosphor, and a producing method of such phosphor; and a light emitting apparatus having stable characteristics and realizing high efficiency. 1. A light converter comprising:a green emitting phosphor having a β-SiAlON crystal structure, and a reflectance of 95% or larger in a region of visible light having wavelengths longer than a peak wave length of the green emitting phosphor, the green emitting phosphor comprising Eu, Si, Al, O, and N.2. The light converter of claim 1 , further comprising at least one additional phosphor selected from the group consisting of a red emitting phosphor or a yellow emitting phosphor claim 1 ,wherein the red emitting phosphor comprises Si, Ni, at least one alkaline earth metal, and at least one trivalent metal element, and the red emitting phosphor has a reflectance of 95% or larger in a region of visible light having wavelengths longer than a peak wave length of the red emitting phosphor, andwherein the yellow emitting phosphor has an α-SiAlON crystal structure comprising Eu, Si, Al, O, N, and at least one element selected from the group consisting of Li, Na, K, Cs, Mg, Ca, Sr, and Ba, and the yellow emitting phosphor has a reflectance of 95% or larger in a region ...

PHOSPHOR PARTICLE GROUP AND LIGHT EMITTING APPARATUS USING THE SAME

Provided is a phosphor particle group of divalent europium-activated oxynitride green light emitting phosphor particles each of which is a β-type SiAlON substantially represented by a general formula: EuaSibAlcOdNe, where 0.005≦a≦0.4, b+c=12, d+e=16, wherein 60% or more of the phosphor particle group is composed of the phosphor particles in which a value obtained by dividing a longer particle diameter by a shorter particle diameter is greater than 1.0 and not greater than 3.0. A high-efficiency and stable light emitting apparatus using a β-type SiAlON, which includes a light converter using the phosphor particle group, and a phosphor particle group therefor are also provided. 1a light emitting element of a gallium nitride-based semiconductor emitting primary light having a peak wavelength of 440-470 nm; anda light converter absorbing a part of said primary light to emit secondary light having a wavelength longer than a wavelength of said primary light, [{'br': None, 'sub': a', 'b', 'c', 'd', 'e, 'EuSiAlON,'}, {'br': None, 'where'}, {'br': None, '0.005≦a≦0.2, b+c=12, d+e=16,'}], 'said light converter including a phosphor particle group of divalent europium-activated oxynitride green light emitting phosphor which is a β-type SiAlON substantially represented by a general formulasaid phosphor particle being a columnar particle in which a value obtained by dividing a longer particle diameter by a shorter particle diameter is greater than 1.0 and not greater than 3.0, andthe light converter further comprising phosphor particles of a red light emitting phosphor.. A white light emitting apparatus comprising: This application is a continuation of application Ser. No. 13/303,907 (allowed), which was filed on Nov. 23, 2011 (published as 2012-0068595 A1 on Mar. 22, 2012), which is a continuation of application Ser. No. 12/668,074 (issued as U.S. Pat. No. 8,084,942), which was filed on Jan. 7, 2010 (published as 2010-0176713-A1 on Jul. 15, 2010), which is a U.S. national phase ...

PHOSPHOR, LIGHT EMITTING APPARATUS, AND LIQUID CRYSTAL DISPLAY APPARATUS USING THE SAME

A phosphor as a divalent europium-activated oxynitride green light emitting phosphor which is a β-type SiAlON substantially represented by a general formula (A): EuSiAlON(where a, b, c, d, and e are numbers satisfying 0.005≦a≦0.4, b+c=12, and d+e=16), and having an average particle size (d1) (determined by an air permeability method) of 9 to 16 μm, a median diameter (50% D) in particle size distribution of 12.5 to 35 μm, 50% D/d1 of 1.4 to 2.2, and an absorptance at 600 nm of not more than 8.0%, and a light emitting apparatus, a BL light source apparatus, and a liquid crystal display device using the same are provided, to provide a light emitting apparatus with a high efficiency and a stable characteristic and a liquid crystal display apparatus using the same by using the β-type SiAlON having controlled dispersibility and improved transparency. 112-. (canceled)13. A light emitting apparatus , comprising:a light emitting element which is a gallium nitride-based semiconductor emitting primary light having a peak wavelength of 430 to 480 nm; anda light converter absorbing a part of said primary light to emit secondary light having a wavelength longer than a wavelength of the primary light, whereinthe light emitting apparatus emits white light by color mixture of primary light and secondary light,said light converter including a green light emitting phosphor and a red light emitting phosphor, and{'sub': a', 'b', 'c', 'd', 'e, 'said green light emitting phosphor is a divalent europium-activated oxynitride green light emitting phosphor which is a β-type SiAlON substantially represented by a general formula (A): EuSiAlON(where a, b, c, d, and e are numbers satisfying 0.005≦a≦0.4, b+c=12, and d+e=16), and 50% D/d1 of 1.4 to 2.2 (where 50% D is a median diameter in particle size distribution and d1 is an average particle size determined by an air permeability method), and an absorptance at 600 nm of not more than 8.0%.'}14. The light emitting apparatus according to claim 13 ...

LIGHT-EMITTING DEVICE

Disclosed is a light-emitting device () including a light-emitting element () emitting primary light, and a light converter () absorbing a part of the primary light emitted from the light-emitting element () and emitting secondary light having a longer wavelength than the primary light. The light converter () contains a green light-emitting phosphor () and a red light-emitting phosphor (). The green light-emitting phosphor () is composed of at least one phosphor selected from a divalent europium-activated oxynitride phosphor substantially represented by the following formula: EuSiAlONand a divalent europium-activated silicate phosphor substantially represented by the following formula: 2(BaMIEu)O.SiO, while the red light-emitting phosphor () is composed of at least one phosphor selected from tetravalent manganese-activated fluoro-tetravalent metalate phosphors substantially represented by the following formulae: MII(MIIIMn)Fand/or MIV(MIIIMn)F. Consequently, the light-emitting device () has excellent color gamut (NTSC ratio). 1. A liquid crystal display incorporating a backlight source including a light-emitting device , the light-emitting device comprising:a light-emitting element emitting primary light, and a light converter absorbing a part of the primary light emitted from the light-emitting element and emitting secondary light having a longer wavelength than the primary light, said light converter including a green light-emitting phosphor and a red light-emitting phosphor,said green light-emitting phosphor including at least one selected from:{'sub': a', 'b', 'c', 'd', 'e, 'a divalent europium-activated oxynitride phosphor which ⊕-type SiAlON, substantially represented by a general formula (A): EuSiAlON(in said general formula (A), 0.005≦a≦0.4, b+c=12, and d+e=16), and'}{'sub': 1-f-g', 'f', 'g', '2, 'a divalent europium-activated silicate phosphor substantially represented by a general formula (B): 2(BaMlEu)O.SiO(in said general formula (B), MI represents at ...

Group of phosphor particles, and light-emitting device using the same

Disclosed is a group of green-light-emitting bivalent europium-activated oxynitride phosphor particles each of which is a β-type SiAlON substantially represented by the general formula: EuaSibAlcOdNe [wherein a, b, c, d and e are numbers that meet the requirements represented by the following formulae: 0.005≤a≤0.4, b+c=12 and d+e=16], wherein the phosphor particles having a value produced by dividing the longer particle diameter by the shorter particle diameter of greater than 1.0 and not greater than 3.0 (1) constitute 60% or more of the whole phosphor particles. Also disclosed is a high-efficiency and stable light-emitting device utilizing a β-type SiAlON, which utilizes the group of the phosphor particles in a wavelength-converting unit thereof. Further disclosed is a group of phosphor particles for use in the device.

Phosphor, light-emitting device, and liquid crystal display device using same

Fluorescent lamp

Luminescent material for mercury discharge lamp

A phosphor, a light-emitting device, and a liquid crystal display device using the same

Lysroer

Lysroer

Lysroer omfattande ett roett ljus emitterande lysaemne samt ny blaott och groent ljus emitterande lysaemnen