Spectral adjustment of an LED array

Patent metadata

Field	Value
Publication number	US-11879635-B2
Application number	US-202217986256-A
Country	US
Kind code	B2
Filing date	Nov 14, 2022
Priority date	Nov 15, 2021
Publication date	Jan 23, 2024
Grant date	Jan 23, 2024

Abstract

A luminaire is provided that includes an LED light engine emitting a light engine light beam and one or more optical devices configured to receive the light engine light beam and form a luminaire light beam emitted by the luminaire. The LED light engine includes an array of LED emitters mounted on a substrate, an array of lenses optically coupled to the array of LED emitters, and a plurality of filter regions. The filter regions of the plurality of filter regions are optically coupled to and fixedly mounted relative to the array of LED emitters. Each filter region of the plurality of filter regions is aligned with an associated LED of the array of LED emitters and is configured to filter substantially only light emitted by the associated LED.

First claim

What is claimed is:

1. A light engine comprising:
an array of LED emitters, comprising phosphor converted LEDs; and
a plurality of filter regions optically coupled to and fixedly mounted relative to the array of LED emitters, each filter region of the plurality of filter regions aligned with an associated LED of the array of LED emitters and configured to filter substantially only light emitted by the associated LED, wherein a transmission curve of the filter regions is configured to pass light of a first color having a desired spectral power distribution (SPD) curve different than an SPD curve of the first color emitted by a phosphor layer of the phosphor converted LEDs, and reflect light of a second color emitted by a pump LED of the phosphor converted LEDs.

2. The light engine of claim 1 , wherein the transmission curve of the filter regions is configured to narrow the SPD curves of the associated LEDs.

3. The light engine of claim 1 , wherein the filter regions comprise dichroic filters.

4. The light engine of claim 3 , wherein the dichroic filters comprise a coating on a surface of a package of each of the associated LEDs.

5. The light engine of claim 1 , wherein the LED emitters comprise one or more of organic LEDs and laser pumped emitters.

6. The light engine of claim 1 , wherein the transmission curve of the filter regions is configured to flatten the SPD curves of the associated LEDs.

7. The light engine of claim 1 , wherein the transmission curve of the filter regions is configured to reduce a central portion of the SPD curves of the associated LEDs.

8. A light engine comprising:
an array of LED emitters mounted on a substrate, comprising phosphor converted LEDs;
an array of lenses optically coupled to the array of LED emitters; and
a plurality of filter regions optically coupled to and fixedly mounted relative to the array of LED emitters, each filter region of the plurality of filter regions aligned with an associated LED of the array of LED emitters and configured to filter substantially only light emitted by the associated LED wherein a transmission curve of the filter regions is configured to pass light of a first color having a desired spectral power distribution (SPD) curve different than an SPD curve of the first color emitted by a phosphor layer of the phosphor converted LEDs, and reflect light of a second color emitted by a pump LED of the phosphor converted LEDs.

9. The light engine of claim 8 , wherein the filter regions comprise dichroic filters.

10. The light engine of claim 8 , wherein each filter region comprises a coating, the coating located on a surface of a package of the associated LED, a rear surface of a lens of the array of lenses, or on a front surface of the lens of the array of lenses.

11. The light engine of claim 8 , wherein the transmission curve of the filter regions is configured to narrow of the SPD curves of the associated LEDs.

12. The light engine of claim 8 , wherein the LED emitters comprise one or more of organic LEDs and laser pumped emitters.

13. The light engine of claim 8 , wherein the transmission curve of the filter regions is configured to flatten the SPD curves of the associated LEDs.

14. The light engine of claim 8 , wherein the transmission curve of the filter regions is configured to reduce a central portion of the SPD curves of the associated LEDs.

15. A luminaire comprising:
an LED light engine emitting a light engine light beam, the LED light engine comprising:
an array of LED emitters mounted on a substrate, comprising phosphor converted LEDs;
an array of lenses optically coupled to the array of LED emitters; and
a plurality of filter regions optically coupled to and fixedly mounted relative to the array of LED emitters, each filter region of the plurality of filter regions aligned with an associated LED of the array of LED emitters and configured to filter substantially only light emitted by the associated LED, wherein a transmission curve of the filter regions is configured to pass light of a first color having a desired spectral power distribution (SPD) curve different than an SPD curve of the first color emitted by a phosphor layer of the phosphor converted LEDs, and reflect light of a second color emitted by a pump LED of the phosphor converted LEDs, the light engine light beam comprising light emitted by the array of LED emitters and passing through one or both of the array of lenses and the plurality of filter regions; and

one or more optical devices configured to receive the light engine light beam and form a luminaire light beam emitted by the luminaire.

16. The luminaire of claim 15 , wherein the filter regions comprise dichroic filters.

17. The luminaire of claim 15 , wherein each filter region comprises a coating, the coating located on a surface of a package of the associated LED, a rear surface of a lens of the array of lenses, or on a front surface of the lens of the array of lenses.

18. The luminaire of claim 15 , wherein the transmission curve of the fitter regions is configured to narrow the SPD curves of the associated LEDs.

19. The luminaire of claim 15 , wherein the LED emitters comprise one or more of organic LEDs and laser pumped emitters.

20. The luminaire of claim 15 , wherein the transmission curve of the filter regions is configured to flatten the SPD curves of the associated LEDs.

21. The luminaire of claim 15 , wherein the transmission curve of the filter regions is configured to reduce a central portion of the SPD curves of the associated LEDs.

Assignees

• Robe Lighting Sro

Inventors

• Vilem Jan
• David Tomas
• Valchar Josef

Classifications

• H10W90/00

  Package configurations · CPC title

• F21Y2113/13

  comprising an assembly of point-like light sources · CPC title

• H10H20/855

  Optical field-shaping means, e.g. lenses · CPC title

• H10H20/851

  Wavelength conversion means · CPC title

• F21V9/30 Primary

  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 title