DIFFUSE LAMP

• US 20150029718A1
• Filed: 07/28/2014
• Published: 01/29/2015
• Est. Priority Date: 07/26/2013
• Status: Abandoned Application

• Current Assignee: Grain Lighting, Inc.
• Original Assignee: Grain Lighting, Inc.
• Inventors: Cook, Robert, Talwar, Vishal, Lander, Marc, Fukumori, Derek
• Application Number:
  US14/444,852
• Publication Number:
  US 20150029718A1
• Time in Patent Office: Days
• US Class Current: 362/235
• CPC Class Codes: F21K 9/60 Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
• CPC Class Codes: F21V 9/08 for producing coloured light, e.g. monochromatic; for reducing intensity of light with provision for controlling the colour F21V9/40
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A lighting assembly including an array of light emitting diodes mounted along a first face of a substrate, a curved translucent diffuser retained proximal the first face of the substrate, offset from the substrate a first distance, a light-absorbing mask including an array of light-transparent windows, the light-absorbing mask arranged between the substrate and the diffuser and retained offset from the first face of the substrate a second distance, with the light-transparent windows substantially aligned with the array of light emitting diodes, and a thermally insulative casing mounted to a second face of the substrate opposing the first face of the substrate.

Claims

1. A lighting assembly comprising:

an array of light emitting diodes mounted along a first face of a substrate;

a curved translucent diffuser retained proximal the first face of the substrate, offset from the substrate a first distance;

a light-absorbing mask comprising an array of light-transparent windows, the light-absorbing mask arranged between the substrate and the diffuser and retained offset from the first face of the substrate a second distance, with the light-transparent windows substantially aligned with the array of light emitting diodes; and

a thermally insulative casing mounted to a second face of the substrate opposing the first face of the substrate.

2. The lighting system of claim 1, wherein the light absorbing mask reduces an emission cone of each light emitting element to a 90 degree cone.

3. The lighting system of claim 1, wherein the light-absorbing mask is configured to absorb light reflected by the translucent diffuser.

4. A lighting assembly comprising:

an array of light emitting elements mounted to a first face of a substrate;

a translucent diffuser arranged offset the first face of the substrate a first distance; and

a light-absorbing mask comprising an array of light-transparent windows, arranged between the diffuser and the first face of the substrate, with each of the light-transparent windows aligned with a light emitting element of the array.

5. The lighting system of claim 4, wherein the ratio of spacing between adjacent light emitting elements and the first distance is at least 1:

2.

6. The lighting system of claim 4, wherein the diffuser is curved and comprises an apex.

7. The lighting system of claim 6, wherein the apex is substantially centered relative to the array of light emitting elements.

8. The lighting system of claim 6, wherein the diffuser is plano-convex.

9. The lighting system of claim 4, wherein the diffuser has a diffusion angle of 90 degrees or less.

10. The lighting system of claim 4, further comprising standoffs statically retaining the diffuser to the substrate.

11. The lighting system of claim 10, wherein the standoffs comprise conductive standoffs electrically connected to a controller operatively connected to the array of light emitting diodes.

12. The lighting system of claim 11, wherein the standoffs are electrically connected to the diffuser, and the diffuser comprises acrylic.

13. The lighting system of claim 12, wherein the standoffs are angled relative to a normal vector of the substrate toward a proximal edge of the substrate.

14. The lighting system of claim 4, wherein the light-absorbing mask is retained offset the first face of the substrate a second distance with each light transmitting window substantially aligned with a light emitting element.

15. The lighting system of claim 14, wherein each light transmitting window partially occludes a portion of an emission cone emitted from a respective light emitting element.

16. The lighting system of claim 15, wherein the light-transmitting windows comprise rounded square profiles.

17. The lighting system of claim 4, further comprising a casing mounted to a second face of the substrate opposing the first face of the substrate.

18. The lighting system of claim 17, wherein the casing comprises a thermally insulative material.

19. The lighting system of claim 18, wherein the casing comprises cork.

20. The lighting system of claim 19, wherein the light emitting elements comprise red light emitting diodes and the lighting system further comprises a controller configured to operate the red light emitting diodes in response to a system temperature exceeding a threshold temperature.