Spherical light output LED lens and heat sink stem system

• US 20110148270A1
• Filed: 12/21/2009
• Published: 06/23/2011
• Est. Priority Date: 12/21/2009
• Status: Active Grant

• Current Assignee: Malek Bhairi
• Original Assignee: Malek Bhairi
• Inventors: Bhairi, Malek
• Granted Patent: US 8,330,342 B2
• Time in Patent Office: Days
• US Class Current: 313/46
• 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 9/60 Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: F21V 7/0091 using total internal reflection
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02B 19/0028 refractive and reflective surfaces, e.g. non-imaging catadioptric systems
• CPC Class Codes: G02B 19/0061 the light source comprising a LED semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission H01L33/00
• CPC Class Codes: G02B 19/0071 adapted to illuminate a complete hemisphere or a plane extending 360 degrees around the source
• CPC Class Codes: H01L 2224/32245 the item being metallic
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48247 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 2224/73265 Layer and wire connectors
• 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 2924/00012 Relevant to the scope of the group, the symbol of which is combined with the symbol of this group
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 2924/181 Encapsulation
• CPC Class Codes: H01L 33/58 Optical field-shaping elements
• CPC Class Codes: H01L 33/62 Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
• CPC Class Codes: H01L 33/642 characterized by the shape

Abstract

This light emitting LED device provides a 360 degree lighting angle in the horizontal plane and a 300 degree lighting angle in the vertical plane while simultaneously addressing LED die thermal management; critical to high lumen output LEDs.

This LED lighting device is comprised of the LED lens, the LED holder and the heat sink stem.

Light produced by at least one LED die traveling vertically is diffused by the top refractive portion of the lens. Light rays directed towards the pointed elements are totally internally reflected downwards then refracted out of the lens, thus resulting in a spherical light pattern.

This technology is designed as a replacement for conventional light sources, such as; incandescent light bulbs, halogen bulbs, CFLs (compact fluorescent lamps) and metal halide lamps.

Claims

1. A lens attachable to an LED light source comprising:

a body includes

a vertical central axis running along the height of the lens;

a lens as the crown of the lens;

5 pointed, reflective and refractive elements, which totally internally reflect light and then refract light emitted from the LED light source such that the majority of the light rays emitted from the lens is radiated around a 300 degree angle in the vertical plane and 360 degrees in the horizontal plane;

an internal surface within the lens roughly parallel to an LED light source which acts as a lens, directing more light towards the pointed elements or towards the crown of the lens.

an attachment means for coupling the lens to an LED holder or heat sink stem;

a base surface for coupling to a light source.

2. The lens of claim 1, wherein the top portion of each of the pointed elements is coated with a reflective material.

3. The lens of claim 1, wherein the base surface is perpendicular to the central axis.

4. The lens of claim 1, wherein the lens is made of a transparent material consisting of PMMA, PC, PEI, or COC.

5. The lens of claim 1, wherein the lens has a refractive index of 1.4 to 1.6.

6. The lens of claim 1, wherein the lens base surface is shaped to couple to the LED light source and LED holder or heat sink stem.

7. The lens of claim 1, wherein the lens is attached to the LED light source and LED holder or heat sink stem via an optical adhesive.

8. The lens of claim 1, wherein the lens is attached to an LED light source with an air gap located between the lens and LED holder or heat sink stem.

9. The lens of claim 1, wherein the lens is attached to an LED light source with a refractive index matched material located between the lens and LED holder or heat sink stem.

10. The lens of claim 1, wherein the lens is attached to an LED holder or heat sink stem containing an LED light source with an LED die mounted lens located between the lens and LED holder or heat sink stem.

11. A heat sink stem comprising:

a body includes

a means for coupling to a lens or lens holder;

a thermally conductive material;

a stem length used as a platform for light propagation;

lead wires traveling the length of the stem to an LED light source.

12. The heat sink stem of claim 11, wherein the heat sink stem comprises:

a cylindicular body;

a protruding cylindicular center section with twist and lock channels;

positive and negative contact points;

A twist and lock attachable lens and holder with positive and negative contact points.

13. The heat sink stem of claim 11, wherein the heat sink stem comprises:

a cylindicular body;

a protruding cylindicular center section with twist and lock channels;

positive and negative contact patches;

A twist and lock attachable lens and holder with positive and negative contact patches.

14. The heat sink stem of claim 11, wherein the heat sink stem comprises:

a cylindicular body;

a protruding cylindicular center section with a screw type pattern on the walls of the perimeter;

positive and negative contact points;

a screwable lens and holder with positive and negative contact points.

15. The heat sink stem of claim 11, wherein the heat sink stem comprises:

a cylindicular body;

positive and negative contact pads;

an attachable lens and holder with solderable positive and negative contact leads.

16. The lens and holder package of claim 11, wherein the holder is made of metal.

17. The heat sink stem of claim 11, wherein the stem is made of a thermally conductive plastic.