Compositions for LED light conversions
First Claim
Patent Images
1. A method of generating white light, the method comprising:
- passing light from a first LED string through a first luminophoric medium comprised of one or more luminescent materials and matrix in a first ratio for a first combined light in a blue color range on 1931 CIE diagram;
passing light from a second LED string through a second luminophoric medium comprised of one or more luminescent materials and matrix in a second ratio for a second combined light in a red color range on 1931 CIE diagram;
passing light from a third LED string through a third luminophoric medium comprised of one or more luminescent materials and matrix in a third ratio for a third combined light in a yellow/green color range on 1931 CIE diagram;
passing light from a fourth LED string through a fourth luminophoric medium comprised of one or more luminescent materials and matrix in a fourth ratio for a fourth combined light in a cyan color range on 1931 CIE diagram;
mixing the first, second, third, and fourth combined light together;
wherein the first, second, and third LED strings each comprise an LED with peak wavelength of between about 385 nm and about 470 nm;
wherein the fourth LED string comprises an LED with a peak wavelength of between about 485 nm and about 520 nm;
wherein the luminescent materials within each of the first, second, third, and fourth luminophoric mediums comprise;
one or more of a first type of luminescent material that emits light at a peak emission between about 515 nm and 590 nm in response to the associated LED string emission, andone or more of a second type of luminescent material that emits light at a peak emission between about 590 nm and about 700 nm in response to the associated LED string emission;
wherein the one or more of the first type of luminescent materials comprise BaMgAl10O17;
Eu, Lu3Al5O12;
Ce, (La,Y)3Si6N1;
Ce, or Y3Al5O12;
Ce,wherein the one or more of the second type of luminescent materials comprise CaAlSiN3;
Eu, (Sr,Ca)AlSiN3, or a semiconductor quantum dot; and
,wherein the third luminophoric medium comprises up to about 99% by volume of Lu3Al5O12;
Ce.
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Abstract
Systems and methods to provide multiple channels of light to form a blended white light output, the systems and methods utilizing recipient luminophoric mediums to alter light provided by light emitting diodes. The predetermined blends of luminescent materials within the luminophoric mediums provide predetermined spectral power distributions in the white light output.
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Citations
22 Claims
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1. A method of generating white light, the method comprising:
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passing light from a first LED string through a first luminophoric medium comprised of one or more luminescent materials and matrix in a first ratio for a first combined light in a blue color range on 1931 CIE diagram; passing light from a second LED string through a second luminophoric medium comprised of one or more luminescent materials and matrix in a second ratio for a second combined light in a red color range on 1931 CIE diagram; passing light from a third LED string through a third luminophoric medium comprised of one or more luminescent materials and matrix in a third ratio for a third combined light in a yellow/green color range on 1931 CIE diagram; passing light from a fourth LED string through a fourth luminophoric medium comprised of one or more luminescent materials and matrix in a fourth ratio for a fourth combined light in a cyan color range on 1931 CIE diagram; mixing the first, second, third, and fourth combined light together; wherein the first, second, and third LED strings each comprise an LED with peak wavelength of between about 385 nm and about 470 nm; wherein the fourth LED string comprises an LED with a peak wavelength of between about 485 nm and about 520 nm; wherein the luminescent materials within each of the first, second, third, and fourth luminophoric mediums comprise; one or more of a first type of luminescent material that emits light at a peak emission between about 515 nm and 590 nm in response to the associated LED string emission, and one or more of a second type of luminescent material that emits light at a peak emission between about 590 nm and about 700 nm in response to the associated LED string emission; wherein the one or more of the first type of luminescent materials comprise BaMgAl10O17;
Eu, Lu3Al5O12;
Ce, (La,Y)3Si6N1;
Ce, or Y3Al5O12;
Ce,wherein the one or more of the second type of luminescent materials comprise CaAlSiN3;
Eu, (Sr,Ca)AlSiN3, or a semiconductor quantum dot; and
,wherein the third luminophoric medium comprises up to about 99% by volume of Lu3Al5O12;
Ce. - View Dependent Claims (2)
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3. A method of generating white light, the method comprising:
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passing light from a first LED string through a first luminophoric medium comprised of one or more luminescent materials and matrix in a first ratio for a first combined light in a blue color range on 1931 CIE diagram; passing light from a second LED string through a second luminophoric medium comprised of one or more luminescent materials and matrix in a second ratio for a second combined light in a red color range on 1931 CIE diagram; passing light from a third LED string through a third luminophoric medium comprised of one or more luminescent materials and matrix in a third ratio for a third combined light in a yellow/green color range on 1931 CIE diagram; passing light from a fourth LED string through a fourth luminophoric medium comprised of one or more luminescent materials and matrix in a fourth ratio for a fourth combined light in a cyan color range on 1931 CIE diagram; mixing the first, second, third, and fourth combined light together; wherein the first, second, and third LED strings each comprise an LED with peak wavelength of between about 385 nm and about 470 nm; wherein the fourth LED string comprises an LED with a peak wavelength of between about 485 nm and about 520 nm; wherein the luminescent materials within each of the first, second, third, and fourth luminophoric mediums comprise; one or more of a first type of luminescent material that emits light at a peak emission between about 515 nm and 590 nm in response to the associated LED string emission, and one or more of a second type of luminescent material that emits light at a peak emission between about 590 nm and about 700 nm in response to the associated LED string emission; wherein the one or more of the first type of luminescent materials comprise BaMgAl10O17;
Eu, Lu3Al5O12;
Ce, (La,Y)3Si6N11;
Ce, or Y3Al5O12;
Ce,wherein the one or more of the second type of luminescent materials comprise CaAlSiN3;
Eu, (Sr,Ca)AlSiN3, or a semiconductor quantum dot; and
,wherein the fourth luminophoric medium comprises up to about 30% by volume of Lu3Al5O12;
Ce. - View Dependent Claims (4)
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5. A method of generating white light, the method comprising:
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passing light from a first LED string through a first luminophoric medium comprised of one or more luminescent materials and matrix in a first ratio for a first combined light in a blue color range on 1931 CIE diagram; passing light from a second LED string through a second luminophoric medium comprised of one or more luminescent materials and matrix in a second ratio for a second combined light in a red color range on 1931 CIE diagram; passing light from a third LED string through a third luminophoric medium comprised of one or more luminescent materials and matrix in a third ratio for a third combined light in a yellow/green color range on 1931 CIE diagram; passing light from a fourth LED string through a fourth luminophoric medium comprised of one or more luminescent materials and matrix in a fourth ratio for a fourth combined light in a cyan color range on 1931 CIE diagram; mixing the first, second, third, and fourth combined light together; wherein the first, second, and third LED strings each comprise an LED with peak wavelength of between about 385 nm and about 470 nm; wherein the fourth LED string comprises an LED with a peak wavelength of between about 485 nm and about 520 nm; wherein the luminescent materials within each of the first, second, third, and fourth luminophoric mediums comprise; one or more of a first type of luminescent material that emits light at a peak emission between about 515 nm and 590 nm in response to the associated LED string emission, and one or more of a second type of luminescent material that emits light at a peak emission between about 590 nm and about 700 nm in response to the associated LED string emission; wherein the one or more of the first type of luminescent materials comprise BaMgAl10O17;
Eu, Lu3Al5O12;
Ce, (La,Y)3Si6N11;
Ce, or Y3Al5O12;
Ce,wherein the one or more of the second type of luminescent materials comprise CaAlSiN3;
Eu, (Sr,Ca)AlSiN3, or a semiconductor quantum dot; and
,wherein the first luminophoric medium comprises up to about 7.5% by volume of BaMgAl10O17;
Eu. - View Dependent Claims (6)
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7. A method of generating white light, the method comprising:
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passing light from a first LED string through a first luminophoric medium comprised of one or more luminescent materials and matrix in a first ratio for a first combined light in a blue color range on 1931 CIE diagram; passing light from a second LED string through a second luminophoric medium comprised of one or more luminescent materials and matrix in a second ratio for a second combined light in a red color range on 1931 CIE diagram; passing light from a third LED string through a third luminophoric medium comprised of one or more luminescent materials and matrix in a third ratio for a third combined light in a yellow/green color range on 1931 CIE diagram; passing light from a fourth LED string through a fourth luminophoric medium comprised of one or more luminescent materials and matrix in a fourth ratio for a fourth combined light in a cyan color range on 1931 CIE diagram; mixing the first, second, third, and fourth combined light together; wherein the first, second, and third LED strings each comprise an LED with peak wavelength of between about 385 nm and about 470 nm; wherein the fourth LED string comprises an LED with a peak wavelength of between about 485 nm and about 520 nm; wherein the luminescent materials within each of the first, second, third, and fourth luminophoric mediums comprise; one or more of a first type of luminescent material that emits light at a peak emission between about 515 nm and 590 nm in response to the associated LED string emission, and one or more of a second type of luminescent material that emits light at a peak emission between about 590 nm and about 700 nm in response to the associated LED string emission; wherein the one or more of the first type of luminescent materials comprise BaMgAl10O17;
Eu, Lu3Al5O12;
Ce, (La,Y)3Si6N11;
Ce, or Y3Al5O12;
Ce,wherein the one or more of the second type of luminescent materials comprise CaAlSiN3;
Eu, (Sr,Ca)AlSiN3, or a semiconductor quantum dot; and
,wherein the second luminophoric medium comprises up to about 15% by volume of BaMgAl10O17;
Eu. - View Dependent Claims (8)
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9. A method of generating white light, the method comprising:
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passing light from a first LED string through a first luminophoric medium comprised of one or more luminescent materials and matrix in a first ratio for a first combined light in a blue color range on 1931 CIE diagram; passing light from a second LED string through a second luminophoric medium comprised of one or more luminescent materials and matrix in a second ratio for a second combined light in a red color range on 1931 CIE diagram; passing light from a third LED string through a third luminophoric medium comprised of one or more luminescent materials and matrix in a third ratio for a third combined light in a yellow/green color range on 1931 CIE diagram; passing light from a fourth LED string through a fourth luminophoric medium comprised of one or more luminescent materials and matrix in a fourth ratio for a fourth combined light in a cyan color range on 1931 CIE diagram; mixing the first, second, third, and fourth combined light together; wherein the first, second, and third LED strings each comprise an LED with peak wavelength of between about 385 nm and about 470 nm; wherein the fourth LED string comprises an LED with a peak wavelength of between about 485 nm and about 520 nm; wherein the luminescent materials within each of the first, second, third, and fourth luminophoric mediums comprise; one or more of a first type of luminescent material that emits light at a peak emission between about 515 nm and 590 nm in response to the associated LED string emission, and one or more of a second type of luminescent material that emits light at a peak emission between about 590 nm and about 700 nm in response to the associated LED string emission; wherein the one or more of the first type of luminescent materials comprise BaMgAl10O17;
Eu, Lu3Al5O12;
Ce, (La,Y)3Si6N11;
Ce, or Y3Al5O12;
Ce,wherein the one or more of the second type of luminescent materials comprise CaAlSiN3;
Eu, (Sr,Ca)AlSiN3, or a semiconductor quantum dot; and
,wherein the third luminophoric medium comprises up to about 85% by volume of BaMgAl10O17;
Eu. - View Dependent Claims (10)
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11. A method of generating white light, the method comprising:
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passing light from a first LED string through a first luminophoric medium comprised of one or more luminescent materials and matrix in a first ratio for a first combined light in a blue color range on 1931 CIE diagram; passing light from a second LED string through a second luminophoric medium comprised of one or more luminescent materials and matrix in a second ratio for a second combined light in a red color range on 1931 CIE diagram; passing light from a third LED string through a third luminophoric medium comprised of one or more luminescent materials and matrix in a third ratio for a third combined light in a yellow/green color range on 1931 CIE diagram; passing light from a fourth LED string through a fourth luminophoric medium comprised of one or more luminescent materials and matrix in a fourth ratio for a fourth combined light in a cyan color range on 1931 CIE diagram; mixing the first, second, third, and fourth combined light together; wherein the first, second, and third LED strings each comprise an LED with peak wavelength of between about 385 nm and about 470 nm; wherein the fourth LED string comprises an LED with a peak wavelength of between about 485 nm and about 520 nm; wherein the luminescent materials within each of the first, second, third, and fourth luminophoric mediums comprise; one or more of a first type of luminescent material that emits light at a peak emission between about 515 nm and 590 nm in response to the associated LED string emission, and one or more of a second type of luminescent material that emits light at a peak emission between about 590 nm and about 700 nm in response to the associated LED string emission; wherein the one or more of the first type of luminescent materials comprise BaMgAl10O17;
Eu, Lu3Al5O12;
Ce, (La,Y)3Si6N11;
Ce, or Y3Al5O12;
Ce,wherein the one or more of the second type of luminescent materials comprise CaAlSiN3;
Eu, (Sr,Ca)AlSiN3, or a semiconductor quantum dot; and
,wherein the fourth luminophoric medium comprises up to about 10% by volume of BaMgAl10O17;
Eu. - View Dependent Claims (12)
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13. A method of generating white light, the method comprising:
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passing light from a first LED string through a first luminophoric medium comprised of one or more luminescent materials and matrix in a first ratio for a first combined light in a blue color range on 1931 CIE diagram; passing light from a second LED string through a second luminophoric medium comprised of one or more luminescent materials and matrix in a second ratio for a second combined light in a red color range on 1931 CIE diagram; passing light from a third LED string through a third luminophoric medium comprised of one or more luminescent materials and matrix in a third ratio for a third combined light in a yellow/green color range on 1931 CIE diagram; passing light from a fourth LED string through a fourth luminophoric medium comprised of one or more luminescent materials and matrix in a fourth ratio for a fourth combined light in a cyan color range on 1931 CIE diagram; mixing the first, second, third, and fourth combined light together; wherein the first, second, and third LED strings each comprise an LED with peak wavelength of between about 385 nm and about 470 nm; wherein the fourth LED string comprises an LED with a peak wavelength of between about 485 nm and about 520 nm; wherein the luminescent materials within each of the first, second, third, and fourth luminophoric mediums comprise; one or more of a first type of luminescent material that emits light at a peak emission between about 515 nm and 590 nm in response to the associated LED string emission, and one or more of a second type of luminescent material that emits light at a peak emission between about 590 nm and about 700 nm in response to the associated LED string emission; wherein the one or more of the first type of luminescent materials comprise BaMgAl10O17;
Eu, Lu3Al5O12;
Ce, (La,Y)3Si6N11;
Ce, or Y3Al5O12;
Ce,wherein the one or more of the second type of luminescent materials comprise CaAlSiN3;
Eu, (Sr,Ca)AlSiN3, or a semiconductor quantum dot; and
,wherein the first luminophoric medium comprises up to about 5% by volume of CaAlSiN3. - View Dependent Claims (14)
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15. A method of generating white light, the method comprising:
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passing light from a first LED string through a first luminophoric medium comprised of one or more luminescent materials and matrix in a first ratio for a first combined light in a blue color range on 1931 CIE diagram; passing light from a second LED string through a second luminophoric medium comprised of one or more luminescent materials and matrix in a second ratio for a second combined light in a red color range on 1931 CIE diagram; passing light from a third LED string through a third luminophoric medium comprised of one or more luminescent materials and matrix in a third ratio for a third combined light in a yellow/green color range on 1931 CIE diagram; passing light from a fourth LED string through a fourth luminophoric medium comprised of one or more luminescent materials and matrix in a fourth ratio for a fourth combined light in a cyan color range on 1931 CIE diagram; mixing the first, second, third, and fourth combined light together; wherein the first, second, and third LED strings each comprise an LED with peak wavelength of between about 385 nm and about 470 nm; wherein the fourth LED string comprises an LED with a peak wavelength of between about 485 nm and about 520 nm; wherein the luminescent materials within each of the first, second, third, and fourth luminophoric mediums comprise; one or more of a first type of luminescent material that emits light at a peak emission between about 515 nm and 590 nm in response to the associated LED string emission, and one or more of a second type of luminescent material that emits light at a peak emission between about 590 nm and about 700 nm in response to the associated LED string emission; wherein the one or more of the first type of luminescent materials comprise BaMgAl10O17;
Eu, Lu3Al5O12;
Ce, (La,Y)3Si6N11;
Ce, or Y3Al5O12;
Ce,wherein the one or more of the second type of luminescent materials comprise CaAlSiN3;
Eu, (Sr,Ca)AlSiN3, or a semiconductor quantum dot; and
,wherein the second luminophoric medium comprises up to about 55% by volume of CaAlSiN3. - View Dependent Claims (16)
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17. A method of generating white light, the method comprising:
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passing light from a first LED string through a first luminophoric medium comprised of one or more luminescent materials and matrix in a first ratio for a first combined light in a blue color range on 1931 CIE diagram; passing light from a second LED string through a second luminophoric medium comprised of one or more luminescent materials and matrix in a second ratio for a second combined light in a red color range on 1931 CIE diagram; passing light from a third LED string through a third luminophoric medium comprised of one or more luminescent materials and matrix in a third ratio for a third combined light in a yellow/green color range on 1931 CIE diagram; passing light from a fourth LED string through a fourth luminophoric medium comprised of one or more luminescent materials and matrix in a fourth ratio for a fourth combined light in a cyan color range on 1931 CIE diagram; mixing the first, second, third, and fourth combined light together; wherein the first, second, and third LED strings each comprise an LED with peak wavelength of between about 385 nm and about 470 nm; wherein the fourth LED string comprises an LED with a peak wavelength of between about 485 nm and about 520 nm; wherein the luminescent materials within each of the first, second, third, and fourth luminophoric mediums comprise; one or more of a first type of luminescent material that emits light at a peak emission between about 515 nm and 590 nm in response to the associated LED string emission, and one or more of a second type of luminescent material that emits light at a peak emission between about 590 nm and about 700 nm in response to the associated LED string emission; wherein the one or more of the first type of luminescent materials comprise BaMgAl10O17;
Eu, Lu3Al5O12;
Ce, (La,Y)3Si6N11;
Ce, or Y3Al5O12;
Ce,wherein the one or more of the second type of luminescent materials comprise CaAlSiN3;
Eu, (Sr,Ca)AlSiN3, or a semiconductor quantum dot; and
,wherein the third luminophoric medium comprises up to about 20% by volume of CaAlSiN3. - View Dependent Claims (18)
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19. A method of generating white light, the method comprising:
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passing light from a first LED string through a first luminophoric medium comprised of one or more luminescent materials and matrix in a first ratio for a first combined light in a blue color range on 1931 CIE diagram; passing light from a second LED string through a second luminophoric medium comprised of one or more luminescent materials and matrix in a second ratio for a second combined light in a red color range on 1931 CIE diagram; passing light from a third LED string through a third luminophoric medium comprised of one or more luminescent materials and matrix in a third ratio for a third combined light in a yellow/green color range on 1931 CIE diagram; passing light from a fourth LED string through a fourth luminophoric medium comprised of one or more luminescent materials and matrix in a fourth ratio for a fourth combined light in a cyan color range on 1931 CIE diagram; mixing the first, second, third, and fourth combined light together; wherein the first, second, and third LED strings each comprise an LED with peak wavelength of between about 385 nm and about 470 nm; wherein the fourth LED string comprises an LED with a peak wavelength of between about 485 nm and about 520 nm; wherein the luminescent materials within each of the first, second, third, and fourth luminophoric mediums comprise; one or more of a first type of luminescent material that emits light at a peak emission between about 515 nm and 590 nm in response to the associated LED string emission, and one or more of a second type of luminescent material that emits light at a peak emission between about 590 nm and about 700 nm in response to the associated LED string emission; wherein the one or more of the first type of luminescent materials comprise BaMgAl10O17;
Eu, Lu3Al5O12;
Ce, (La,Y)3Si6N11;
Ce, or Y3Al5O12;
Ce,wherein the one or more of the second type of luminescent materials comprise CaAlSiN3;
Eu, (Sr,Ca)AlSiN3, or a semiconductor quantum dot; and
,wherein the fourth luminophoric medium comprises up to about 20% by volume of CaAlSiN3. - View Dependent Claims (20)
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21. A method of generating white light, the method comprising:
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passing light from a first LED string through a first luminophoric medium comprised of one or more luminescent materials and matrix in a first ratio for a first combined light in a blue color range on 1931 CIE diagram; passing light from a second LED string through a second luminophoric medium comprised of one or more luminescent materials and matrix in a second ratio for a second combined light in a red color range on 1931 CIE diagram; passing light from a third LED string through a third luminophoric medium comprised of one or more luminescent materials and matrix in a third ratio for a third combined light in a yellow/green color range on 1931 CIE diagram; passing light from a fourth LED string through a fourth luminophoric medium comprised of one or more luminescent materials and matrix in a fourth ratio for a fourth combined light in a cyan color range on 1931 CIE diagram; mixing the first, second, third, and fourth combined light together; wherein the first, second, and third LED strings each comprise an LED with peak wavelength of between about 385 nm and about 470 nm; wherein the fourth LED string comprises an LED with a peak wavelength of between about 485 nm and about 520 nm; wherein the luminescent materials within each of the first, second, third, and fourth luminophoric mediums comprise; one or more of a first type of luminescent material that emits light at a peak emission between about 515 nm and 590 nm in response to the associated LED string emission, and one or more of a second type of luminescent material that emits light at a peak emission between about 590 nm and about 700 nm in response to the associated LED string emission; wherein the relative spectral power distribution of the first combined light is 100% for wavelengths between 380 nm and 500 nm, between 27.0% and 65.1% for wavelengths between 501 nm to 600 nm, between 24.8% and 46.4% for wavelengths between 601 nm to 700 nm, between 1.1% to 6.8% for wavelengths between 701 nm to 780 nm; wherein the relative spectral power distribution of the second combined light is between 3.3% and 17.4% for wavelengths between 380 nm and 500 nm, between 8.9% and 24.8% for wavelengths between 501 nm to 600 nm, 100% for wavelengths between 601 nm to 700 nm, between 1.1% to 18.1% for wavelengths between 701 nm to 780 nm; wherein the relative spectral power distribution of the third combined light is between 2.4% and 35.8% for wavelengths between 380 nm and 500 nm, 100% for wavelengths between 501 nm to 600 nm, between 61.2% and 142.0% for wavelengths between 601 nm to 700 nm, between 7.9% to 21.1% for wavelengths between 701 nm to 780 nm; and wherein the relative spectral power distribution of the first combined light is between 1.9% and 32.2% for wavelengths between 380 nm and 500 nm, 100% for wavelengths between 501 nm to 600 nm, between 14.7% and 42.4% for wavelengths between 601 nm to 700 nm, between 1.3% to 6.1% for wavelengths between 701 nm to 780 nm. - View Dependent Claims (22)
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Specification