Solid state spot light assembly

• US 8,192,057 B2
• Filed: 06/29/2011
• Issued: 06/05/2012
• Est. Priority Date: 06/24/2009
• Status: Active Grant

• Current Assignee: Elumigen Llc
• Original Assignee: Elumigen Llc
• Inventors: Dassanayake, Mahendra, De Mel, Srini, Samarabandu, Jagath
• Primary Examiner(s): Neils, Peggy A.
• Application Number:
  US13/172,511
• Publication Number:
  US 20110255283A1
• Time in Patent Office: 342 Days
• Field of Search: 362/249.02, 362/84, 362/231, 362/293, 362/247, 362/297, 362/346, 362/296.08
• US Class Current: 362/296.08
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21K 9/64 using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
• CPC Class Codes: F21V 13/08 the elements being filters or photoluminescent elements and reflectors
• CPC Class Codes: F21V 23/009 the casing being inside the housing of the lighting device
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• CPC Class Codes: F21V 29/767 the planes containing the fins or blades having directions perpendicular to the light emitting axis
• CPC Class Codes: F21V 3/00 Globes; Bowls; Cover glasses with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506
• CPC Class Codes: F21V 3/02 characterised by the shape
• CPC Class Codes: F21V 7/0025 Combination of two or more reflectors for a single light source array of reflectors for a cluster of light sources F21V7/0083
• CPC Class Codes: F21V 7/06 with parabolic curvature
• CPC Class Codes: F21V 7/08 with elliptical curvature
• CPC Class Codes: F21V 7/28 characterised by coatings
• CPC Class Codes: F21V 9/06 for filtering out ultraviolet radiation
• 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 9/30 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 Class Codes: F21V 9/35 at focal points, e.g. of refractors, lenses, reflectors or arrays of light sources
• CPC Class Codes: F21Y 2103/33 annular
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A light assembly that includes a base, a housing extending from the base having a partial paraboloidal cross-sectional surface, a light-shifting element disposed within the housing, and a plurality of light sources coupled to the housing. The light sources generate light. The light assembly also includes an angular portion reflecting light from the light sources toward the parabolic cross-sectional surface so that the light reflected from the parabolic surface is directed toward the light-shifting element and light reflected from the light-shifting element is directed out of the housing after reflecting from the housing.

Claims

1. A light assembly comprising:

a base;

a housing extending from the base having a reflective partial paraboloidal cross-sectional surface;

a light shifting element disposed within the housing;

a plurality of light-emitting diodes coupled to the housing, said light-emitting diodes generating light; and

an angular portion reflecting light from the light-emitting diodes toward the parabolic cross sectional surface, so that the light reflected from the parabolic surface is directed toward the light shifting element and light reflected from the light shifting element is directed out of the housing after reflecting from the housing.

2. A light assembly as recited in claim 1 wherein the plurality of light-emitting diodes are coupled to an extension portion.

3. A light assembly as recited in claim 2 wherein the extension portion is disposed at a 45°

angle from the angular portion.

4. A light assembly as recited in claim 3 wherein the extension portion intersects the angular portion.

5. A light assembly as recited in claim 1 further comprising a light redirection element for forming collimated light toward the angular portion.

6. A light assembly as recited in claim 5 wherein the light redirection element comprises a lens.

7. A light assembly as recited in claim 6 wherein the light redirection element comprises a reflector.

8. A light assembly as recited in claim 1 further comprising a control circuit disposed within the housing.

9. A light assembly as recited in claim 1 further comprising a control circuit disposed within the base of the housing.

10. A light assembly as recited in claim 8 wherein the housing comprises traces in communication with the control circuit and the light-emitting diodes.

11. A light assembly as recited in claim 10 wherein the traces are formed within the housing.

12. A light assembly as recited in claim 1 further comprising a lens coupled to the angular portion.

13. A light assembly as recited in claim 1 wherein the light shifting element comprises a spheroidal portion.

14. A light assembly as recited in claim 13 wherein the spherical portion has a center on a longitudinal axis of the housing.

15. A light assembly as recited in claim 1 wherein the light shifting element comprises a spheroidal portion and a cylindrical portion.

16. A light assembly as recited in claim 1 wherein the light shifting element is coupled to the base.

17. A light assembly as recited in claim 1 wherein the light shifting element comprises a spheroidal portion and a first cylindrical portion and a second cylindrical portion.