Compositions for LED light conversions

• US 10,465,862 B2
• Filed: 07/31/2017
• Issued: 11/05/2019
• 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): Alavi, Ali
• Application Number:
  US15/665,269
• Publication Number:
  US 20170356624A1
• Time in Patent Office: 827 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 white-light-emitting device comprising:

a first LED, a second LED, and a third LED, each configured to emit light with peak wavelength of between about 385 nm and about 485 nm;

a first recipient luminophoric medium associated with the first LED and configured to provide a first combined light when excited by the first LED, the first recipient luminphoric medium comprised of one or more luminescent materials and matrix in a first ratio to produce the first combined light in a blue color range on 1931 CIE diagram;

a second recipient luminophoric medium associated with the second LED and configured to provide a second combined light when excited by the second LED, the second recipient luminphoric medium comprised of one or more luminescent materials and matrix in a second ratio to produce the second combined light in a red color range on 1931 CIE diagram;

a third recipient luminophoric medium associated with the third LED and configured to provide a third combined light when excited by the third LED, the third recipient luminphoric medium comprised of one or more luminescent materials and matrix in a third ratio to produce the third combined light in a yellow/green color range on 1931 CIE diagram;

a fourth LED configured to emit light with a peak wavelength of between about 465 nm and about 520 nm;

a fourth recipient luminophoric medium associated with the fourth LED and configured to provide a fourth combined light when excited by the fourth LED, the fourth recipient luminphoric medium comprised of one or more luminescent materials and matrix in a fourth ratio to produce the fourth combined light in a cyan color range on 1931 CIE diagram;

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 light emission; and

,

wherein the luminescent materials within each of the first, second, third, and fourth luminophoric mediums comprise 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 light emission.

2. The white-light-emitting device of claim 1, wherein one or more of:

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. The white-light-emitting device 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.

4. The white-light-emitting device of claim 1, wherein one or more of:

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;

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;

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

the relative spectral power distribution of the first combined light is between 19.9% 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.

5. The white-light-emitting device of claim 1, wherein one or more of:

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 61 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 m, 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.

6. The white-light-emitting device of claim 2, wherein one or more of:

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;

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;

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

the relative spectral power distribution of the first combined light is between 19.9% 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.

7. The white-light-emitting device of claim 2, wherein one or more of:

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 between461 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 48.4to 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% to34.4% 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.

8. The white-light-emitting device of claim 3, wherein one or more of:

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;

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;

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 01 nm to 780 nm; and

the relative spectral power distribution of the first combined light is between 19.9% 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.

9. The white-light-emitting device of claim 3, wherein one or more of:

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 to660 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.

10. The white-light-emitting device of any one of claims 1-3, wherein:

the one or more of the first type of luminescent materials comprise one or more of BaMgAl₁₀O₁₇;

Eu, Lu₃Al₅O₁₂;

Ce, (La,Y)₃Si₆N₁₁;

Ce, or Y₃Al₅O₁₂;

Ce; and

the one or more of the second type of luminescent materials comprise CaAlSiN₃;

Eu, (Sr,Ca)AlSiN₃, or a semiconductor quantum dot.

11. The white-light-emitting device of any one of claims 2, wherein:

the blue color range comprises a region on the 1931 CIE Chromaticity Diagram defined by a 60-step MacAdam ellipse at 20000K, 40 points below the Planckian locus.

12. The white-light-emitting device of any one of claims 2, wherein:

the red color range comprises a region on the 1931 CIE Chromaticity Diagram defined by a 20-step MacAdam ellipse at 1200K, 20 points below the Planckian locus.

13. The white-light-emitting device of any one of claims 2, wherein:

the yellow/green color range comprises a region on the 1931 CIE Chromaticity Diagram defined by a 16-step MacAdam ellipse at 3700K, 30 points above Planckian locus.

14. The white-light-emitting device of any one of claims 2, wherein:

the cyan color range comprises a region on the 1931 CIE Chromaticity Diagram defined by 30-step MacAdam ellipse at 6000K, 68 points above the Planckian locus.

15. The white-light-emitting device of any one of claims 1, further comprising a current supply circuit configured to independently apply an on-state drive current to each of the first LED, second LED, third LED, and fourth LED.

16. The white-light-emitting device of claim 15, further comprising a control system configured to selectively provide one or more control signals to the control supply circuit.

17. The white-light-emitting device of claim 16, wherein the one or more control signals are generated from one or more sensors configured to sense one or more of electrical, optical, thermal, and environmental conditions of the device.

18. The white-light-emitting device of any one of claims 15, wherein:

the first, second, third, and fourth combined light in combination form a fifth combined light having a fifth color point; and

the current supply circuit is configured to adjust the fifth color point so that it falls within a 7-step MacAdam ellipse around any point on the black body locus having a correlated color temperature between about 2700K to about 6500K.