LED lighting systems and/or methods of making the same

• US 8,992,045 B2
• Filed: 07/22/2011
• Issued: 03/31/2015
• Est. Priority Date: 07/22/2011
• Status: Expired due to Fees

• Current Assignee: Guardian Glass LLC (KOCH Industries Incorporated)
• Original Assignee: Guardian Industries Corporation (KOCH Industries Incorporated)
• Inventors: Veerasamy, Vijayen S., Alvarez, Jemssy
• Primary Examiner(s): Mai, Anh
• Assistant Examiner(s): APENTENG, JESSICA MCMILLAN
• Application Number:
  US13/188,916
• Publication Number:
  US 20130021799A1
• Time in Patent Office: 1,348 Days
• Field of Search: 362/249.02, 362/247, 362/241, 362/341, 362/296.03, 362/800, 257/98
• US Class Current: 362/249.02
• CPC Class Codes: F21S 2/005 of modular construction
• CPC Class Codes: F21V 1/17 the material comprising photoluminescent substances
• CPC Class Codes: F21V 13/04 the elements being reflectors and refractors for vehicle rear lights F21S43/40
• CPC Class Codes: F21V 13/14 the elements being filters or photoluminescent elements, reflectors and refractors
• CPC Class Codes: F21V 3/08 the material comprising photoluminescent substances
• CPC Class Codes: F21V 3/12 the coatings comprising photoluminescent substances
• CPC Class Codes: F21V 33/006 General building constructions or finishing work for buildings, e.g. roofs, gutters, stairs or floors; Garden equipment; Sunshades or parasols
• CPC Class Codes: F21V 5/045 the lens having discontinuous faces, e.g. Fresnel lenses
• CPC Class Codes: F21V 5/10 comprising photoluminescent material
• CPC Class Codes: F21V 7/0083 Array of reflectors for a cluster of light sources, e.g. arrangement of multiple light sources in one plane combination of two or more reflectors F21V7/0025
• CPC Class Codes: F21V 7/26 the material comprising photoluminescent substances
• CPC Class Codes: F21V 7/30 the coatings comprising photoluminescent substances
• 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: F21V 9/32 characterised by the arrangement of the photoluminescent material
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

Certain example embodiments relate to improved lighting systems and/or methods of making the same. In certain example embodiments, a lighting system includes a glass substrate with one or more apertures. An LED or other light source is disposed at one end of the aperture such that light from the LED directed through the aperture of the glass substrate exits the opposite end of the aperture. Inner surfaces of the aperture have a mirroring material such as silver to reflect the emitted light from the LED. In certain example embodiments, a remote phosphor article or layer is disposed opposite the LED at the other end of the aperture. In certain example embodiment, a lens is disposed in the aperture, between the remote phosphor article and the LED.

Claims

1. A method of making a light fixture, the method comprising:

forming a plurality of cavities in a glass substrate, the cavities each being tapered along a depth thereof so that each cavity increases in diameter or distance from a first end thereof to a second end thereof;

disposing a reflective element on a surface of each of the cavities;

disposing a lens entirely within each of the cavities; and

locating a light emitting diode (LED) at or proximate to the first end of each said cavity, so that a plurality of LEDs are provided in a plurality of respective cavities in the glass substrate, so as to enable the associated reflective element to reflect at least some light emitted from the respective LED in a given cavity, substantially conserving &

endue of the light from the respective LED, and wherein light from the LED in a given cavity passes through the lens before being output from the light fixture, wherein

said lens comprises, when viewed in cross section, a main body portion and flare portions extending away from the main body portion and away from the LED in the cavity in which the lens is provided, the main body portion having a curved upper surface, each of the flares including a first profile, a second profile and a third profile, the first profile being parabolic in shape and curving away from the main body portion, the second profile extending upwardly and inwardly from an uppermost part of the first profile, and the third profile extending between an uppermost part of the second profile and an end of the curved upper surface of the main body portion.

2. The method of claim 1, wherein

each said cavity has a parabolic side wall when viewed in cross section.

3. The method of claim 1, wherein

the disposing of the reflective element comprises disposing a thin-film material on the surface of each said cavity.

4. The method of claim 3, wherein

the thin-film material is silver.

5. The method of claim 3, further comprising disposing a protective material over the thin-film material.

6. The method of claim 5, wherein

the protective material is a polymer, epoxy, resin, or atomic layer deposition (ALD) deposited layer.

7. The method of claim 1, wherein

each said cavity is a through-hole.

8. The method of claim 1, wherein

each said cavity is formed to a depth shallower than a depth of the glass substrate.

9. The method of claim 1, wherein

each said LED is located on a printed circuit board.

10. The method of claim 1, wherein

each said LED is a chip-on-glass formed LED.

11. The method of claim 1, wherein

the reflected light exiting the second end of each said cavity is substantially collimated so as to allow for 10-30 degrees of distribution.

12. A lighting apparatus, comprising:

a glass substrate having a plurality of cavities formed therein, each said cavity (a) being tapered along a depth thereof so that the at least one cavity increases in diameter or width from a first end thereof to a second end thereof, (b) having a reflective element on a surface thereof, and (c) having a lens disposed entirely within the cavity proximate at least the first end of the cavity; and

a plurality of light emitting diodes (LEDs) at or proximate to the first end of respective ones of said cavities so as to enable the reflective element of the associated cavity to reflect at least some light emitted from the respective LED, substantially conserving &

endue of the light from the respective LED, wherein light from the LED in a given cavity passes through the lens before being output from the lighting apparatus, wherein

said lens comprises, when viewed in cross section, a main body portion and flare portions extending away from the main body portion and away from the LED in the cavity in which the lens is provided, the main body portion having a curved upper surface, each of the flares including a first profile, a second profile and a third profile, the first profile being parabolic in shape and curving away from the main body portion, the second profile extending upwardly and inwardly from an uppermost part of the first profile, and the third profile extending between an uppermost part of the second profile and an end of the curved upper surface of the main body portion.

13. The apparatus of claim 12, wherein

each said cavity has a parabolic side wall when viewed in cross section.

14. The apparatus of claim 12, wherein

the reflective element of each said cavity comprises a thin-film layer.

15. The apparatus of claim 14, further comprising a protective material over the thin-film layer.

16. The apparatus of claim 15, wherein

the protective material is a polymer, epoxy, resin, or atomic layer deposition (ALD) deposited layer.

17. The apparatus of claim 12, wherein

each said cavity is a through-hole.

18. The apparatus of claim 12, wherein

each said cavity is formed to a depth shallower than a depth of the glass substrate.

19. The apparatus of claim 12, further comprising a printed circuit board supporting the plurality of LEDs, the printed circuit board also being mounted on the glass substrate.

20. The apparatus of claim 12, wherein

each said LED is a chip-on-glass formed LED.

21. The apparatus of claim 12, wherein

the reflected light exiting the second end of each said cavity is substantially collimated so as to allow for 10-30 degrees of distribution.

22. A lighting system comprising the apparatus of claim 21.

23. A lighting system comprising a plurality of interconnected apparatuses, wherein each said apparatus is the apparatus of claim 21.