LED light bulb

• US 20060274529A1
• Filed: 05/31/2006
• Published: 12/07/2006
• Est. Priority Date: 06/01/2005
• Status: Abandoned Application

• Current Assignee: CAO Group, Inc.
• Original Assignee: CAO Group, Inc.
• Inventors: Cao, Densen
• Application Number:
  US11/444,166
• Publication Number:
  US 20060274529A1
• Time in Patent Office: Days
• US Class Current: 362/294
• CPC Class Codes: F21K 9/233 specially adapted for generating a spot light distribution, e.g. for substitution of reflector lamps
• CPC Class Codes: F21V 23/002 Arrangements of cables or conductors inside a lighting device, e.g. means for guiding along parts of the housing or in a pivoting arm
• CPC Class Codes: F21V 23/009 the casing being inside the housing of the lighting device
• CPC Class Codes: F21V 29/505 of reflectors
• CPC Class Codes: F21V 29/773 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

An LED light bulb can include a unitary casing that serves many functions, such as mounting platform for the light source, as heat sink, as heat dissipater with cooling fins, as the mounting structure for a light reflector, as the mounting structure for the lens, as the mounting structure for the connector, as the housing for the light bulb, and as the gripping surface for installation of the light bulb into a light socket. The casing has two separate cavities, one for installation of the LED light source, reflector and lens, and another for installation of control circuitry. A connection fitting may be included.

Claims

1. An LED light bulb comprising:

unitary casing,

aid unitary casing being a continuous, one-piece formation,

aid casing serving as a heat sink for an LED light source,

aid casing being made from a heat-conductive material,

plurality of peaks and valleys located on the exterior of said casing,

aid peaks and valleys serving as cooling fins,

aid casing serving as a heat dissipator,

first and second cavities located within said casing,

said first cavity having a flat proximal surface and an annular interior surface,

an LED light source mounted in said first cavity on said proximal surface,

a light reflector located in said first cavity,

said light reflector serving to gather light emitted by said lights source and reflect it toward said casing distal side,

a control panel for said LED light source mounted in said second cavity, and

a lens at said first cavity distal side,

said lens and said light reflector being balanced to create a light beam of desired density and having a desired light footprint.

2. A device as recited in claim 1 wherein said LED light source includes a heat sink, an LED chip mounted to said head sink, and a dome over said LED chip.

3. A device as recited in claim 1 wherein said casing is made at least in part from Cu.

4. A device as recited in claim 1 wherein said casing is made at least in part from Al.

5. A device as recited in claim 1 wherein said light source includes only a single LED chip.

6. A device as recited in claim 1 wherein said light source includes an array of LED chips.

7. A device as recited in claim 1 wherein said light source includes an LED chip array.

8. A device as recited in claim 1 wherein said light source has a light profile which is balanced with said light reflector and said lens to achieve a desired light beam density and footprint.

9. A device as recited in claim 1 wherein said unitary casing serves all of the functions of being a mounting platform for the light source, being a heat sink, being a heat dissipater, being a mounting structure for the light reflector, being a mounting structure for the lens, being a mounting structure for a connector, being a housing for the light bulb, and providing a gripping surface for installation of the light bulb into a light socket.

10. A device as recited in claim 1 further comprising:

a neck structure on said casing, said neck structure serving as a transition to a connection fitting.

11. A device as recited in claim 1 wherein said lens is a Fresnel lens.

12. A device as recited in claim 1 wherein said lens is selected from the group consisting of concave lenses, convex lenses, flat lenses, multi-focal lenses, converging prisms, diverging prisms, double concave lenses, double convex lenses, spherical lenses, piano-convex lenses, plano-concave lenses, and meniscus lenses.

13. A device as recited in claim 1 further comprising a mounting plate for mounting said LED light source to said casing.

14. A device as recited in claim 13 further comprising a plurality of screws for affixing said mounting plate and said LED light source to said casing.

15. A device as recited in claim 1 further comprising a quantity of heat conductive past located between said LED light source and said casing.