LED lamp

• US 8,461,748 B1
• Filed: 01/28/2011
• Issued: 06/11/2013
• Est. Priority Date: 04/29/2010
• Status: Expired due to Fees

• Current Assignee: Lights of America
• Original Assignee: Lights of America
• Inventors: Taj, Aijaz
• Primary Examiner(s): Patel, Nimeshkumar
• Assistant Examiner(s): Hollweg, Thomas A
• Application Number:
  US12/931,302
• Time in Patent Office: 865 Days
• Field of Search: 313/498, 313/46, 313/512, 313/318.01, 313/318.03, 313/318.06, 362/227, 362/249.01, 362/249.02, 362/249.06, 362/294
• 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: F21V 29/773 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21V 29/777 the planes containing the fins or blades having directions perpendicular to the light emitting axis
• CPC Class Codes: F21Y 2107/30 on the outer surface of cylindrical surfaces, e.g. rod-shaped supports having a circular or a polygonal cross section
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

An LED lamp has an arrangement of LEDs that results in light emitted in a substantially spherical light field. The LED lamp has a bulb-shaped body with at least one LED at the top and a number of LEDs positioned around the circumference of the body. The LEDs are arranged such that light is emitted forward from the lamp and also from the sides of the lamp. Accordingly, the LED lamp, for example, in operation provides illumination in direction and intensity very similar to an incandescent bulb.

Claims

1. An LED lamp, comprising:

a body having a cylindrical shape, the body further having a top and a bottom and a circumferential channel, the circumferential channel having sides and a back, wherein the to has a flat portion, wherein the flat portion has a center point and wherein the body curves toward the center point, the body further having a plurality of radial fins between the circumferential channel and the top, wherein the plurality of radial fins are shaped and configured to conform to the shape of the body;

at least one LED mounted on the top; and

a plurality of LEDs mounted to the back of the circumferential channel, the plurality of LEDs mounted in the circumferential channel such that the fields of light from the LEDs overlap.

2. The LED lamp of claim 1 wherein the LEDs are arranged to provide light of increased intensity in a selected direction in reference to the lamp.

3. The LED lamp of claim 1 wherein the LEDs are mounted in thermal communication with the body.

4. The LED lamp of claim 1 wherein the body has a second plurality of radial fins between the circumferential channel and the bottom.

5. The LED lamp of claim 1 wherein the LEDs mounted in the channel are mounted to a flexible circuit board that is attached to the body with thermal adhesive.

6. The LED lamp of claim 1 wherein the circumferential channel has a cover.

7. An LED lamp, comprising:

a body having a cylindrical shape, the body further having a top and a bottom and a circumferential channel, the circumferential channel having sides and a back, and wherein the body has a first plurality of radial fins between the circumferential channel and the top;

at least one LED mounted on the top; and

a plurality of LEDs mounted to the back of the circumferential channel, the plurality of LEDs mounted in the circumferential channel such that the fields of light from the LEDs overlap.

8. An LED lamp, comprising:

a body having a cylindrical shape, the body further having a top and a bottom and a circumferential channel, the circumferential channel having sides and a back, and wherein the body is bulb-shaped with a globe-shaped portion that tapers to a stem opposite the top, and wherein the body has a first plurality of radial fins between the circumferential channel and the top and a second plurality of radial fins between the circumferential channel and the bottom, wherein the first plurality and second plurality of fins are shaped and configured to conform to the shape of the body;

at least one LED mounted on the top; and

a plurality of LEDs mounted to the back of the circumferential channel, the plurality of LEDs mounted in the circumferential channel such that the fields of light from the LEDs overlap.

9. The LED lamp of claim 8 wherein the LEDs are located and arranged to provide a substantially spherical field of light.

10. The LED lamp of claim 8 wherein the fins are tuned to provide particular thermal management characteristics.

11. The LED lamp of claim 10 wherein the tuning is accomplished by a selected number of fins.

12. The LED lamp of claim 10 wherein the tuning is accomplished by a materials composition of the fins.

13. The LED lamp of claim 10 wherein the tuning is accomplished by the number of fins and by the materials composition of the fins.

14. The LED lamp of claim 8 wherein the top has a first cover and the circumferential channel has a second cover and wherein the first and second covers have curvature configured to conform to the bulb-shaped body.

15. An LED lamp, comprising:

a body having a bulb shape, the body having a first portion that is substantially globe-shaped tapering to a second portion having a smaller radius than the first portion, the body further having a top located on the first portion of the body and a bottom located opposite the top, and a circumferential channel located on the first portion, the circumferential channel having sides and a back, the body further having a first plurality of radial fins between the circumferential channel and the top and a second plurality of radial fins between the circumferential channel and the bottom, wherein the first plurality and second plurality of fins are shaped and configured to conform to the bulb shape of the body;

at least one LED mounted on the top; and

a plurality of LEDs mounted to the back of the circumferential channel such that the fields of light from the LEDs overlap.