Light bulb having wide angle light dispersion using crystalline material

• US 7,319,293 B2
• Filed: 08/09/2004
• Issued: 01/15/2008
• Est. Priority Date: 04/30/2004
• Status: Active Grant

• Current Assignee: Lighting Science Group Corporation (Pegasus Capital Advisors, L.P.)
• Original Assignee: Lighting Science Group Corporation (Pegasus Capital Advisors, L.P.)
• Inventors: Maxik, Fredric
• Primary Examiner(s): Williams; Joseph
• Assistant Examiner(s): Won; Bumsuk
• Application Number:
  US10/915,301
• Publication Number:
  US 20050242734A1
• Time in Patent Office: 1,254 Days
• Field of Search: 313/110, 313/112, 313634-636
• US Class Current: 313/636
• 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 9/233 specially adapted for generating a spot light distribution, e.g. for substitution of reflector lamps
• CPC Class Codes: F21K 9/90 Methods of manufacture
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2105/12 characterised by the geometrical disposition of the light-generating elements, e.g. arranging light-generating elements in differing patterns or densities
• CPC Class Codes: F21Y 2107/20 on convex supports or substrates, e.g. on the outer surface of spheres
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

The present light bulb includes a wide angle dispersed light which uses, as a source of light dispersion, crystalline particulate material incorporated into the molded or formed material of the light bulb. The crystalline particulate material can be incorporated into the light bulb material prior to the molding or forming process or it can be later applied to the surfaces of the light bulb. The crystalline particulate material are chosen to provide high reflectivity and dispersion qualities for the parts of the light bulb and are further chosen and incorporated according to the function of the particular piece or part therein incorporated. A light tuning element may also be used to further enhance the light dispersion qualities of the light bulb. Methods for making the present light bulb are also provided.

Claims

1. A light bulb generating an output comprising electromagnetic emissions in the visible wavelength range to produce a widely dispersed light, comprising:

a housing having a base and an optical opening for emitting said widely dispersed light from said housing;

an optical element positioned substantially over said optical opening;

a source of lighting located within said housing; and

electrical leads connecting said base with said source of lighting, wherein said housing and said optical element each have structure that causes wide dispersion of light traveling from said source of lighting to said optical opening, said structure including a mixture of moldable material and transparent particulate crystalline material.

2. The light bulb having widely dispersed light of claim 1 wherein said optical element is composed of a substantially translucent material.

3. The light bulb having widely dispersed light of claim 1 wherein said transparent particulate crystalline material is substantially symmetrical.

4. The light bulb having widely dispersed light of claim 1 wherein said transparent particulate crystalline material is selected from the group consisting of quartz crystals, diamond crystals, sapphire crystals, and zirconia crystals.

5. The light bulb having widely dispersed light of claim 1 wherein said transparent particulate crystalline material is present in said mixture from about 1 to 12 percent by weight, based on the total mixture composition.

6. The light bulb having widely dispersed light of claim 1 wherein said transparent particulate crystalline material has planes that are oriented in substantially the same direction.

7. The light bulb having widely dispersed light of claim 1 wherein said housing is substantially conically-shaped.

8. The light bulb having widely dispersed light of claim 1 wherein said moldable material is selected from the group consisting of polymers, copolymers, epoxies, acrylics, polyester resins, and resins.

9. The light bulb having widely dispersed light of claim 1 wherein at least a portion of said optical element comprises a colored material.

10. The light bulb having widely dispersed light of claim 1 wherein said source of lighting is at least one light emitting diode.

11. The light bulb having widely dispersed light of claim 1 wherein said source of lighting further comprises a substrate for accepting at least one light emitting diode.

12. The light bulb having widely dispersed light of claim 11 wherein said substrate is a flexible substrate capable of forming substantially to the inside surface of said housing.

13. The light bulb having widely dispersed light of claim 1 further comprising:

a source of light emitting electromagnetic light in the non-visible wavelength range.