Compositions for LED light conversions

• US 9,719,660 B1
• Filed: 06/07/2016
• Issued: 08/01/2017
• Est. Priority Date: 01/28/2016
• Status: Active Grant

• Current Assignee: Korrus Incorporated (MKD Electric, Inc.)
• Original Assignee: EcoSense Lighting Inc.
• Inventors: Petluri, Raghuram L. V., Pickard, Paul Kenneth
• Primary Examiner(s): Husar, Stephen F
• Application Number:
  US15/176,083
• Publication Number:
  US 20170219184A1
• Time in Patent Office: 420 Days
• CPC Class Codes: C09K 11/02 Use of particular materials as binders, particle coatings or suspension media therefor
• CPC Class Codes: C09K 11/0883 Arsenides; Nitrides; Phosphides
• CPC Class Codes: C09K 11/646 Silicates
• CPC Class Codes: C09K 11/7734 Aluminates
• CPC Class Codes: C09K 11/77348 Silicon Aluminium Nitrides or Silicon Aluminium Oxynitrides
• CPC Class Codes: F21K 9/64 using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
• CPC Class Codes: F21V 13/14 the elements being filters or photoluminescent elements, reflectors and refractors
• CPC Class Codes: F21V 3/00 Globes; Bowls; Cover glasses with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506
• CPC Class Codes: F21V 3/12 the coatings comprising photoluminescent substances
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: F21V 7/00 Reflectors for light sources characterised by cooling arrangements F21V29/505
• CPC Class Codes: F21V 9/02 for simulating daylight F21V9/04, F21V9/06 take precedence
• CPC Class Codes: F21V 9/30 Elements containing photoluminescent material distinct from or spaced from the light source shades F21V1/17; globes, bowls or cover glasses F21V3/08, F21V3/12; refractors F21V5/10; reflectors F21V7/26, F21V7/30; elements with provision for controlling the spectral properties or intensity F21V9/40
• CPC Class Codes: F21V 9/38 Combination of two or more photoluminescent elements of different materials
• CPC Class Codes: F21Y 2101/00 Point-like light sources
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02B 6/0001 specially adapted for lighting devices or systems lighting or signalling on vehicles using light guides B60Q1/00; lighting devices for vehicle dashboards B60Q3/10; lighting devices for vehicle interior using light guides B60Q3/62; lighting devices mounted on the vehicle rear part using light guides F21S43/235; measuring arrangements having light conducting pointers G01D13/265; illumination of liquid crystal displays G02F1/1336; illuminated signs G09F13/00
• CPC Class Codes: Y02B 20/00 Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

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.

Claims

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, 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.

2. The method of claim 1, wherein

the blue color range comprises a range defined by a line connecting the ccx, ccy color coordinates of the infinity point of the Planckian locus (0.242, 0.24) and (0.12, 0.068), the Planckian locus from 4000K and infinite CCT, the constant CCT line of 4000K, the line of purples, and the spectral locus;

the red color range comprises a range defined by the spectral locus between the constant CCT line of 1600K and the line of purples, the line of purples, a line connecting the ccx, ccy color coordinates (0.61, 0.21) and (0.47, 0.28), and the constant CCT line of 1600K;

the yellow/green color range comprises a range defined by the constant CCT line of 4600K, the Planckian locus between 4600K and 550K, the spectral locus, and a line connecting the ccx, ccy color coordinates (0.445, 0.555) and (0.38, 0.505); and

the cyan color range comprises a range defined by a line connecting the ccx, ccy color coordinates (0.18, 0.55) and (0.27, 0.72), the constant CCT line of 9000K, the Planckian locus between 9000K and 4600K, the constant CCT line of 4600K, and the spectral locus.

3. 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, 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.

4. The method of claim 3, wherein

the blue color range comprises a range defined by a line connecting the ccx, ccy color coordinates of the infinity point of the Planckian locus (0.242, 0.24) and (0.12, 0.068), the Planckian locus from 4000K and infinite CCT, the constant CCT line of 4000K, the line of purples, and the spectral locus;

the red color range comprises a range defined by the spectral locus between the constant CCT line of 1600K and the line of purples, the line of purples, a line connecting the ccx, ccy color coordinates (0.61, 0.21) and (0.47, 0.28), and the constant CCT line of 1600K;

the yellow/green color range comprises a range defined by the constant CCT line of 4600K, the Planckian locus between 4600K and 550K, the spectral locus, and a line connecting the ccx, ccy color coordinates (0.445, 0.555) and (0.38, 0.505); and

the cyan color range comprises a range defined by a line connecting the ccx, ccy color coordinates (0.18, 0.55) and (0.27, 0.72), the constant CCT line of 9000K, the Planckian locus between 9000K and 4600K, the constant CCT line of 4600K, and the spectral locus.

5. 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, 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.

6. The method of claim 5, wherein

the blue color range comprises a range defined by a line connecting the ccx, ccy color coordinates of the infinity point of the Planckian locus (0.242, 0.24) and (0.12, 0.068), the Planckian locus from 4000K and infinite CCT, the constant CCT line of 4000K, the line of purples, and the spectral locus;

the red color range comprises a range defined by the spectral locus between the constant CCT line of 1600K and the line of purples, the line of purples, a line connecting the ccx, ccy color coordinates (0.61, 0.21) and (0.47, 0.28), and the constant CCT line of 1600K;

the yellow/green color range comprises a range defined by the constant CCT line of 4600K, the Planckian locus between 4600K and 550K, the spectral locus, and a line connecting the ccx, ccy color coordinates (0.445, 0.555) and (0.38, 0.505); and

the cyan color range comprises a range defined by a line connecting the ccx, ccy color coordinates (0.18, 0.55) and (0.27, 0.72), the constant CCT line of 9000K, the Planckian locus between 9000K and 4600K, the constant CCT line of 4600K, and the spectral locus.

7. 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, 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.

8. The method of claim 7, wherein

the blue color range comprises a range defined by a line connecting the ccx, ccy color coordinates of the infinity point of the Planckian locus (0.242, 0.24) and (0.12, 0.068), the Planckian locus from 4000K and infinite CCT, the constant CCT line of 4000K, the line of purples, and the spectral locus;

the red color range comprises a range defined by the spectral locus between the constant CCT line of 1600K and the line of purples, the line of purples, a line connecting the ccx, ccy color coordinates (0.61, 0.21) and (0.47, 0.28), and the constant CCT line of 1600K;

the yellow/green color range comprises a range defined by the constant CCT line of 4600K, the Planckian locus between 4600K and 550K, the spectral locus, and a line connecting the ccx, ccy color coordinates (0.445, 0.555) and (0.38, 0.505); and

the cyan color range comprises a range defined by a line connecting the ccx, ccy color coordinates (0.18, 0.55) and (0.27, 0.72), the constant CCT line of 9000K, the Planckian locus between 9000K and 4600K, the constant CCT line of 4600K, and the spectral locus.

9. 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, 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.

10. The method of claim 9, wherein

the blue color range comprises a range defined by a line connecting the ccx, ccy color coordinates of the infinity point of the Planckian locus (0.242, 0.24) and (0.12, 0.068), the Planckian locus from 4000K and infinite CCT, the constant CCT line of 4000K, the line of purples, and the spectral locus;

the red color range comprises a range defined by the spectral locus between the constant CCT line of 1600K and the line of purples, the line of purples, a line connecting the ccx, ccy color coordinates (0.61, 0.21) and (0.47, 0.28), and the constant CCT line of 1600K;

the yellow/green color range comprises a range defined by the constant CCT line of 4600K, the Planckian locus between 4600K and 550K, the spectral locus, and a line connecting the ccx, ccy color coordinates (0.445, 0.555) and (0.38, 0.505); and

the cyan color range comprises a range defined by a line connecting the ccx, ccy color coordinates (0.18, 0.55) and (0.27, 0.72), the constant CCT line of 9000K, the Planckian locus between 9000K and 4600K, the constant CCT line of 4600K, and the spectral locus.

11. 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, 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.

12. The method of claim 11, wherein

the blue color range comprises a range defined by a line connecting the ccx, ccy color coordinates of the infinity point of the Planckian locus (0.242, 0.24) and (0.12, 0.068), the Planckian locus from 4000K and infinite CCT, the constant CCT line of 4000K, the line of purples, and the spectral locus;

the red color range comprises a range defined by the spectral locus between the constant CCT line of 1600K and the line of purples, the line of purples, a line connecting the ccx, ccy color coordinates (0.61, 0.21) and (0.47, 0.28), and the constant CCT line of 1600K;

the yellow/green color range comprises a range defined by the constant CCT line of 4600K, the Planckian locus between 4600K and 550K, the spectral locus, and a line connecting the ccx, ccy color coordinates (0.445, 0.555) and (0.38, 0.505); and

the cyan color range comprises a range defined by a line connecting the ccx, ccy color coordinates (0.18, 0.55) and (0.27, 0.72), the constant CCT line of 9000K, the Planckian locus between 9000K and 4600K, the constant CCT line of 4600K, and the spectral locus.

13. 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, 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.

14. The method of claim 13, wherein

the blue color range comprises a range defined by a line connecting the ccx, ccy color coordinates of the infinity point of the Planckian locus (0.242, 0.24) and (0.12, 0.068), the Planckian locus from 4000K and infinite CCT, the constant CCT line of 4000K, the line of purples, and the spectral locus;

the red color range comprises a range defined by the spectral locus between the constant CCT line of 1600K and the line of purples, the line of purples, a line connecting the ccx, ccy color coordinates (0.61, 0.21) and (0.47, 0.28), and the constant CCT line of 1600K;

the yellow/green color range comprises a range defined by the constant CCT line of 4600K, the Planckian locus between 4600K and 550K, the spectral locus, and a line connecting the ccx, ccy color coordinates (0.445, 0.555) and (0.38, 0.505); and

the cyan color range comprises a range defined by a line connecting the ccx, ccy color coordinates (0.18, 0.55) and (0.27, 0.72), the constant CCT line of 9000K, the Planckian locus between 9000K and 4600K, the constant CCT line of 4600K, and the spectral locus.

15. 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, 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.

16. The method of claim 15, wherein

the blue color range comprises a range defined by a line connecting the ccx, ccy color coordinates of the infinity point of the Planckian locus (0.242, 0.24) and (0.12, 0.068), the Planckian locus from 4000K and infinite CCT, the constant CCT line of 4000K, the line of purples, and the spectral locus;

the red color range comprises a range defined by the spectral locus between the constant CCT line of 1600K and the line of purples, the line of purples, a line connecting the ccx, ccy color coordinates (0.61, 0.21) and (0.47, 0.28), and the constant CCT line of 1600K;

the yellow/green color range comprises a range defined by the constant CCT line of 4600K, the Planckian locus between 4600K and 550K, the spectral locus, and a line connecting the ccx, ccy color coordinates (0.445, 0.555) and (0.38, 0.505); and

the cyan color range comprises a range defined by a line connecting the ccx, ccy color coordinates (0.18, 0.55) and (0.27, 0.72), the constant CCT line of 9000K, the Planckian locus between 9000K and 4600K, the constant CCT line of 4600K, and the spectral locus.

17. 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, 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.

18. The method of claim 17, wherein

the blue color range comprises a range defined by a line connecting the ccx, ccy color coordinates of the infinity point of the Planckian locus (0.242, 0.24) and (0.12, 0.068), the Planckian locus from 4000K and infinite CCT, the constant CCT line of 4000K, the line of purples, and the spectral locus;

the red color range comprises a range defined by the spectral locus between the constant CCT line of 1600K and the line of purples, the line of purples, a line connecting the ccx, ccy color coordinates (0.61, 0.21) and (0.47, 0.28), and the constant CCT line of 1600K;

the yellow/green color range comprises a range defined by the constant CCT line of 4600K, the Planckian locus between 4600K and 550K, the spectral locus, and a line connecting the ccx, ccy color coordinates (0.445, 0.555) and (0.38, 0.505); and

the cyan color range comprises a range defined by a line connecting the ccx, ccy color coordinates (0.18, 0.55) and (0.27, 0.72), the constant CCT line of 9000K, the Planckian locus between 9000K and 4600K, the constant CCT line of 4600K, and the spectral locus.

19. 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, 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.

20. The method of claim 19, wherein

the blue color range comprises a range defined by a line connecting the ccx, ccy color coordinates of the infinity point of the Planckian locus (0.242, 0.24) and (0.12, 0.068), the Planckian locus from 4000K and infinite CCT, the constant CCT line of 4000K, the line of purples, and the spectral locus;

the red color range comprises a range defined by the spectral locus between the constant CCT line of 1600K and the line of purples, the line of purples, a line connecting the ccx, ccy color coordinates (0.61, 0.21) and (0.47, 0.28), and the constant CCT line of 1600K;

the yellow/green color range comprises a range defined by the constant CCT line of 4600K, the Planckian locus between 4600K and 550K, the spectral locus, and a line connecting the ccx, ccy color coordinates (0.445, 0.555) and (0.38, 0.505); and

the cyan color range comprises a range defined by a line connecting the ccx, ccy color coordinates (0.18, 0.55) and (0.27, 0.72), the constant CCT line of 9000K, the Planckian locus between 9000K and 4600K, the constant CCT line of 4600K, and the spectral locus.

21. 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, 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.

22. The method of claim 21 wherein:

the relative spectral power distribution of the first combined light is between 0.3% to 8.1% for wavelengths between 380 nm and 420 nm, 100% for wavelengths between 421 nm to 460 nm, between 20.9% and 196.1% for wavelengths between 461 nm to 500 nm, between 15.2% to 35.6% for wavelengths between 501 nm to 540 nm, between 25.3% to 40.5% for wavelengths between 541 nm to 580 nm, between 26.3% and 70.0% for wavelengths between 581 nm to 620 nm, between 15.4% to 80.2% for wavelengths between 621 nm to 660 nm, between 5.9% to 20.4% for wavelengths between 661 nm to 700 nm, between 2.3% to 7.8% for wavelengths between 701 nm to 740 nm, between 1.0% to 2.3% for wavelengths between 741 nm to 780 nm;

the relative spectral power distribution of the second combined light is between 0.0% to 14.8% for wavelengths between 380 nm and 420 nm, between 2.1% to 157.8% for wavelengths between 421 nm to 460 nm, between 2.0% to 6.7% for wavelengths between 461 nm to 500 nm, between 1.4% to 12.2% for wavelengths between 501 nm to 540 nm, between 8.7% to 20.5% for wavelengths between 541 nm to 580 nm, between 48.5% and 102.8% for wavelengths between 581 nm to 620 nm, 100% for wavelengths between 621 nm to 660 nm, between 1.8% to 74.3% for wavelengths between 661 nm to 700 nm, between 0.5% to 29.5% for wavelengths between 701 nm to 740 nm, between 0.3% to 9.0% for wavelengths between 741 nm to 780 nm;

the relative spectral power distribution of the third combined light is between 0.0% to 1.1% for wavelengths between 380 nm and 420 nm, between 1.0% to 25.3% for wavelengths between 421 nm to 460 nm, between 4.2% and 52.7% for wavelengths between 461 nm to 500 nm, between 56.6% to 77.5% for wavelengths between 501 nm to 540 nm, 100% for wavelengths between 541 nm to 580 nm, between 80.5% and 123.4% for wavelengths between 581 nm to 620 nm, between 48.4% to 144.9% for wavelengths between 621 nm to 660 nm, between 12.6% to 88.8% for wavelengths between 661 nm to 700 nm, between 3.2% to 34.4% for wavelengths between 701 nm to 740 nm, between 1.0% to 10.5% for wavelengths between 741 nm to 780 nm; and

the relative spectral power distribution of the first combined light is between 0.1% to 0.7% for wavelengths between 380 nm and 420 nm, between 0.5% to 1.6% for wavelengths between 421 nm to 460 nm, between 39.6% and 58.6% for wavelengths between 461 nm to 500 nm, 100% for wavelengths between 501 nm to 540 nm, between 62.0% to 80.4% for wavelengths between 541 nm to 580 nm, between 41.6% and 59.9% for wavelengths between 581 nm to 620 nm, between 23.1% to 57.1% for wavelengths between 621 nm to 660 nm, between 6.6% to 35.0% for wavelengths between 661 nm to 700 nm, between 1.8% to 13.5% for wavelengths between 701 nm to 740 nm, between 0.6% to 4.1% for wavelengths between 741 nm to 780 nm.