Reflective device for area lighting using narrow beam light emitting diodes

• US 8,125,127 B2
• Filed: 02/11/2010
• Issued: 02/28/2012
• Est. Priority Date: 02/11/2009
• Status: Expired due to Fees

• Current Assignee: Anthony Mo, Michael Palazzi
• Original Assignee: Anthony Mo, Michael Palazzi
• Inventors: Mo, Anthony, Palazzi, Michael
• Primary Examiner(s): WALFORD, NATALIE K
• Application Number:
  US12/658,624
• Publication Number:
  US 20100213835A1
• Time in Patent Office: 747 Days
• Field of Search: None
• US Class Current: 313/113
• 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 9/27 Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
• 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: F21K 9/64 using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
• CPC Class Codes: F21K 9/68 Details of reflectors forming part of the light source
• CPC Class Codes: F21V 3/06 characterised by the material
• CPC Class Codes: F21V 3/061 the material being glass
• CPC Class Codes: F21V 3/062 the material being plastics
• CPC Class Codes: F21V 7/24 characterised by the material
• CPC Class Codes: F21V 7/28 characterised by coatings
• CPC Class Codes: F21Y 2103/00 Elongate light sources, e.g. fluorescent tubes
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

An article of manufacture, comprising: at least one point source of light which emits a light beam; and at least one reflective means for diffusing the light and/or converting the light to a different color range. The goal of this invention is to greatly increase the energy efficiency of area lighting by the use of highly efficient beams light sources.

Claims

1. An article of manufacture, comprising:

at least one point source of light which emits an initial light beam having a beam divergence of less than or equal to 10 degrees about an axis of emission; and

at least one apparatus for diffusing the light, said diffusing apparatus comprising;

a first beveled washer, oriented with a first washer-base substantially perpendicular to said light beam and having a reflective surface beveled at a first bevel angle with respect to said first washer-base, said beveled, reflecting surface being positioned between said first washer-base and said point source of light such that the beveled, reflective surface reflects an outer portion of said light beam away from said axis of emission but with a component of direction in the direction of said initial light beam, and wherein said first beveled washer has a hole with a center substantially aligned to said axis of emission, such that a central portion of said light beam passes through said first beveled washer unimpeded; and

a second beveled washer oriented with a second washer-base substantially perpendicular to said light beam and having a reflective surface beveled at a second bevel angle with respect to said second washer-base, said second bevel angle being substantially larger than said first beveled angle, said beveled, reflected surface being positioned between said second washer-base and said first beveled washer such that the beveled, reflective surface reflects a portion of said light beam away from said axis of emission but with a component of direction in the direction of said initial light beam, and wherein said second washer has a hole with a center substantially aligned to said axis of emission, such that a central portion of said light beam passes through said second beveled washer unimpeded.

2. The article of claim 1, wherein the point source of light is an LED.

3. The article of claim 2, wherein the point source of light and the reflective means are contained in a bulb.

4. The article of claim 3, wherein the reflective means is at least one cone shaped reflector.

5. The article of claim 3, wherein the reflective means is a plurality of cone shaped reflectors.

6. The article of claim 5, wherein each reflector only reflects a portion of the light beam.

7. The article of claim 1, wherein the reflective means can be adjusted to adjust the light diffusion.

8. The article of claim 1, wherein the point source of light is replaceable.

9. The article of claim 2, wherein the point source of light and the reflective means are contained in a tube.

10. The article of claim 9, wherein the tube has a length and a width, and the width has a circular shape or a semi-circular shape.

11. The article of claim 1, wherein the point source of light and the reflective means are contained in a bulb or tube, and the tube or bulb contains a suspension of light reflecting or converting particles such as those coated with a phosphorus compound.

12. The article of claim 11, wherein the suspension is in a liquid phase which can be cured and the light reflecting particles are oriented prior to curing.

13. The article of claim 12, wherein the light reflecting particles are oriented with an electromagnetic field.

14. The article of claim 12, wherein the light reflecting particles are oriented mechanically.

15. The article of claim 11, wherein the light reflecting particle is translucent and disperses light at least two directions.

16. The article of claim 9, wherein the tube is a fiber having a variable gradient.

17. The article of claim 11, wherein the suspension can be moved by heat or other external force.

18. The article of claim 1, wherein phosphorous is disposed on the reflective means and the phosphorous converts the light beam to a different color.

19. The article of claim 1, wherein the light source is comprised of separate multi colored light sources, and the separate multi colored light sources combine to provide a specific color though fixed or variable mixing.