Luminaires and lighting structures

• US 8,696,154 B2
• Filed: 08/19/2011
• Issued: 04/15/2014
• Est. Priority Date: 08/19/2011
• Status: Active Grant

• Current Assignee: LSI Industries Incorporated
• Original Assignee: LSI Industries Incorporated
• Inventors: Hutchens, Daniel C.
• Primary Examiner(s): Husar, Stephen F
• Application Number:
  US13/213,282
• Publication Number:
  US 20130044475A1
• Time in Patent Office: 970 Days
• Field of Search: 362/217.05, 362/217.07, 362/223, 362/245, 362308-310, 362/296.05, 362/296.07, 362/311.02, 362/328, 362/329, 362/343, 362/346, 362/235
• US Class Current: 362/217.05
• CPC Class Codes: F21V 11/14 with many small apertures
• CPC Class Codes: F21V 13/04 the elements being reflectors and refractors for vehicle rear lights F21S43/40
• CPC Class Codes: F21V 15/013 the housing being an extrusion
• CPC Class Codes: F21V 17/164 the parts being subjected to bending, e.g. snap joints
• CPC Class Codes: F21V 3/06 characterised by the material
• CPC Class Codes: F21V 5/045 the lens having discontinuous faces, e.g. Fresnel lenses
• CPC Class Codes: F21V 7/0016 on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes
• CPC Class Codes: F21W 2131/301 for furniture
• CPC Class Codes: F21W 2131/305 for refrigerators
• CPC Class Codes: F21W 2131/405 for shop-windows or displays
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

Luminaires are disclosed that include refractive and/or reflective structures that can provide or distribute lighting for a given area with high uniformity and efficiency. The structures can be used to distribute light from one or more light sources for lighting target areas with a desired light distribution. The lighting structures can be included in light strips or luminaires. Such luminaire can be utilized in place of fluorescent lights and can facilitate quick and easy retrofit for previous fluorescent lighting applications. The disclosed techniques and systems (including components and structures) can be particularly useful when employing one or more LEDs as light sources.

Claims

1. A luminaire comprising:

a first light source and a second light source;

an elongated reflective element defining a first aperture located adjacent to the first light source and configured to pass a first portion of light received from the first light source through the first aperture in a first direction and reflect a second portion of light received from the first light source in a second direction;

the elongated reflective element defining a second aperture located adjacent to the second light source and configured to pass a first portion of light received from the second light source through the second aperture in a third direction and reflect a second portion of light received from the second light source in a fourth direction; and

a refractive element configured to receive and transmit the first and second portions of light.

2. The luminaire of claim 1, wherein the third direction is approximately the same as the first direction.

3. The luminaire of claim 1, wherein the reflective element comprises a V-shaped cross section.

4. The luminaire of claim 3, wherein the included angle of the V-shaped cross section is about 100 degrees.

5. The luminaire of claim 1, wherein the refractive element comprises a contoured portion configured to receive the first portion of light.

6. The luminaire of claim 5, wherein the contoured portion has a V-shaped cross section.

7. The luminaire of claim 5, wherein the contoured portion has a parabolic cross section.

8. The luminaire of claim 6, wherein the included angle of the V-shaped cross section is about 112 degrees.

9. The luminaire of claim 7, wherein the included angle of the parabolic cross section is about 112 degrees.

10. The luminaire of claim 1, wherein the refractive element comprises a lateral face.

11. The luminaire of claim 1, wherein the refractive element comprises a pair of opposed lateral faces.

12. The luminaire of claim 1, further comprising a frame configured to hold the light sources.

13. The luminaire of claim 12 further comprising a reflector mounting clip connecting the elongated reflective element to the frame and locating the first aperture adjacent to the first light source, the reflector mounting clip comprising first and second receiving legs, each receiving leg defining a receiving slot receiving the elongated reflective element.

14. The luminaire of claim 12, further comprising a reflector mounting clip connecting the elongated reflective element to the frame and locating the first aperture adjacent to the first light source, the refractive element comprising a inwardly directed member holding the mounting structure to the frame.

15. The luminaire of claim 1, wherein the first light source is a LED.

16. A luminaire comprising:

a first light source for emitting light and a second light source for emitting light;

an elongated reflector having a first side and a second side and defining a first aperture extending from the first side to the second side and defining a second aperture extending from the first side to the second side, the reflector configured and situated such that;

a first portion of the light emitted by the first light source passes through the first aperture and a first portion of the light emitted by the second light source passes through the second aperture; and

a second portion of the light emitted by the first light source is reflected by the first side of the reflector and a second portion of the light emitted by the second light source is reflected by the first side of the reflector.

17. The luminaire of claim 16 wherein the first portion of light emitted by the second light source passes through the second aperture to a refractive element.

18. The luminaire of claim 16 wherein the reflector is generally V-shaped defining a vertex and the luminaire is configured such that the first light source is situated adjacent to the vertex of the V-shaped reflector.

19. The luminaire of claim 16 wherein the reflector is generally V-shaped defining a vertex and the luminaire is configured such that the first light source is located adjacent the first aperture, which is defined approximately at the vertex of the V-shaped reflector.

20. The luminaire of claim 16 wherein the first light source is an LED.

21. The luminaire of claim 16 wherein a third portion of light emitted by the light source does not pass through the reflector and is not reflected by the first side of the reflector.

22. The luminaire of claim 17 further comprising a reflector mounting clip connecting the elongated reflector to a frame and locating the first aperture adjacent to the first light source, the reflector mounting clip comprising first and second receiving legs, each receiving leg defining a receiving slot receiving the elongated reflector.

23. The luminaire of claim 16 further comprising a refractor lens having a central lens portion configured to receive at least a portion of the first portion of light emitted by the first light source.

24. The luminaire of claim 23 wherein the central lens portion is contoured to refract light.