Granted Patent
B2
US 12,353,005 · App. 18/363,224 · Granted Jul 8, 2025
Waveguide-based light sources with dynamic beam shaping
Inventors:
Eric J. Tarsa (Goleta, CA); Jean-Claude David Ramey DeSugny (Santa Barbara, CA); David Stone (Santa Barbara, CA); Benjamin A. Jacobson (Santa Barbara, CA); Shawn Patrick Keeney (Chapel Hill, NC); Claudio Girotto (Santa Barbara, CA); Theodore Lowes (Lompoc, CA); Chandan Bhat (Goleta, CA); Mark Youmans (Goleta, CA)
Assignee:
CREE LIGHTING USA LLC
G02B6/12004F21S6/005F21V23/0435F21V23/0464F21V23/0471F21V23/0485G02B6/0045G02B6/0063G02B6/0076G02B6/0088G02B6/122F21Y2103/33F21Y2105/16F21Y2105/18F21Y2115/10G02B6/0068G02B6/0073G02B6/0078G02B2006/12083
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Abstract
Luminaires are described herein employing waveguides and associated architectures for dynamic alteration of illuminance distribution patterns. The waveguide includes a light extraction component. The waveguide transmits light from a light source to the light extraction component by total internal reflection (TIR). The light extraction component includes one or more reversibly moveable surfaces for altering illuminance distribution patterns of the luminaire in response to one or more forces applied to the light extraction component by a force application assembly of the luminaire.
Claims (23)
1. A luminaire comprising:
a waveguide assembly including a waveguide body and light extraction elements bonded to an exterior face of the waveguide body, wherein at least one reinforcement member comprises a frame contacting surfaces of the waveguide body at one or more locations along a light emitting side of the waveguide body to reduce deflection of the waveguide assembly under an applied flexural load; and
a plurality of light sources arranged along an edge of the waveguide body at different angular positions relative to the waveguide body such that light emitted from each of the plurality of light sources provides a distribution pattern with an elongated lobe-shaped beam in a distinct azimuthal direction from the surface of the waveguide body.
2. The luminaire of claim 1 , wherein the light extraction elements are part of a light extractor plate bonded to the exterior face.
3. The luminaire of claim 2 , wherein the light extraction elements define a bonding region between the extractor plate and waveguide body.
4. The luminaire of claim 3 , wherein the reinforcement member is coupled to the waveguide assembly along one or more edges of the bonding region.
5. The luminaire of claim 2 , wherein the frame contacts surfaces of the light extractor plate.
6. The luminaire of claim 2 , wherein the frame is a clamping frame having one side coupled to the waveguide body and opposing side coupled to the light extractor plate.
7. The luminaire of claim 1 , wherein the light extraction elements are arranged in an array.
8. The luminaire of claim 1 , wherein the light extraction elements define a light emission region.
9. The luminaire of claim 8 , wherein the reinforcement member is attached to the waveguide assembly at one or more edges of the light emission region.
10. The luminaire of claim 1 , wherein optical efficiency of the waveguide assembly is reduced less than 5 percent by the reinforcement member.
11. The luminaire of claim 1 , wherein the reinforcement member precludes debonding of the light extraction elements from the exterior surface under the applied flexural load.
12. The luminaire of claim 11 , wherein the applied flexural load is at least 50 pounds.
13. The luminaire of claim 11 , wherein the applied flexural load is sufficient to de-bond one or more of the light extraction elements from the waveguide body in absence of the reinforcement member.
14. The luminaire of claim 1 , wherein the edge of the waveguide body has a polygonal shape comprising a plurality of sides and the plurality of light sources are arranged along at least two sides of the plurality of sides.
15. The luminaire of claim 1 , wherein the edge of the waveguide body is curved.
16. The luminaire of claim 1 further comprising control circuitry configured to alter an illuminance distribution pattern of the luminaire by selecting one of a plurality of activation patterns of the plurality of light sources.
17. The luminaire of claim 16 , wherein the illuminance distribution pattern comprises a combined azimuthal component that is steered by the different angular positions of the plurality of light sources relative to the waveguide body and the selected one of the plurality of activation patterns of the plurality of light sources.
18. The luminaire of claim 1 , wherein the light sources comprise light emitting diodes.
19. The luminaire of claim 1 further comprising a programmable device controlling an illuminance distribution pattern of the luminaire by selecting one of a plurality of activation patterns of the plurality of light sources.
20. The luminaire of claim 19 , wherein the programmable device stores the plurality of activation patterns.
21. The luminaire of claim 1 , wherein the light extraction elements are bonded to the exterior face with an adhesive.
Assignments (4)
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded May 22, 2026
From: LUMEN ACQUISITION HOLDINGS, LLC
To: LED-IP MANAGEMENT, LLC
Reel/Frame 075624/0358 →
CHANGE OF NAME
Recorded Nov 16, 2023
From: IDEAL INDUSTRIES LIGHTING LLC
To: CREE LIGHTING USA LLC
Reel/Frame 065601/0333 →
SECURITY INTEREST
Recorded Sep 13, 2023
From: IDEAL INDUSTRIES LIGHTING LLC
To: FGI WORLDWIDE LLC
Reel/Frame 064897/0413 →
ASSIGNMENT OF ASSIGNOR'S INTEREST
Recorded Aug 1, 2023
From: TARSA, ERIC J.; DESUGNY, JEAN-CLAUDE DAVID RAMEY; STONE, DAVID; JACOBSON, BENJAMIN A.; KEENEY, SHAWN PATRICK; GIROTTO, CLAUDIO; LOWES, THEODORE; BHAT, CHANDAN; YOUMANS, MARK
To: IDEAL INDUSTRIES LIGHTING LLC
Reel/Frame 064451/0349 →
Continuity (7)
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