Wide-angle LED lighting lamp with high heat-dissipation efficiency and uniform illumination

• US 7,936,119 B2
• Filed: 03/19/2009
• Issued: 05/03/2011
• Est. Priority Date: 10/16/2008
• Status: Active Grant

• Current Assignee: Yung Pun Cheng
• Original Assignee: Yung Pun Cheng
• Inventors: Cheng, Yung Pun
• Primary Examiner(s): Williams; Joseph L
• Assistant Examiner(s): QUARTERMAN, KEVIN J
• Application Number:
  US12/407,562
• Publication Number:
  US 20100096966A1
• Time in Patent Office: 775 Days
• Field of Search: 313498-500, 313/506, 313/512, 257 98-100
• US Class Current: 313/498
• 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 29/74 with fins or blades
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21Y 2107/00 Light sources with three-dimensionally disposed light-generating elements
• CPC Class Codes: F21Y 2107/40 on the sides of polyhedrons, e.g. cubes or pyramids
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

LED lighting lamps provide optimum heat dissipation efficiency, wide illumination beam angles, and substantially uniform illumination intensity. Generally, the disclosed LED lamps comprise at least one LED lighting element and a substrate with a plurality of inclined planes.

Claims

1. An LED lamp comprising:

a substrate with a plurality of inclined planes, wherein the inclined planes are radially distributed around a central axis and form a plurality of levels with a plurality of inclination angles, and wherein two adjacent inclined planes of the plurality of inclined planes at the same level of the plurality of levels have substantially different inclination angles;

a heat sink formed together with the substrate into one part; and

at least one LED light element located on at least one of the inclined planes.

2. The LED lamp of claim 1, wherein a reflector is positioned on the central axis of the LED lamp, the reflector having an outer surface shaped like one or more circular arcs.

3. The LED lamp of claim 2, wherein the at least one LED light element comprises a bare chip without packaging.

4. The LED lamp of claim 1, wherein two not adjacent inclined planes of the plurality of inclined planes are separated by another inclined plane of the plurality of inclined planes, the two not adjacent inclined planes having substantially the same inclination angle.

5. The LED lamp of claim 1, wherein the levels comprise at least two levels.

6. The LED lamp of claim 1, wherein the inclination angles of the inclined planes are within the range of 10°

to 80°

, the inclination angles of the inclined planes comprising the angle relative to a plane perpendicular to a central axis of the LED lamp.

7. The LED lamp of claim 1, wherein the substrate and the heat sink comprise metal modules cast-formed into one part.

8. The LED lamp of claim 1, wherein a lateral part of the heat sink comprises fin-shaped flanges.

9. The LED lamp of claim 1, wherein the at least one LED light element is located at a junction of at least two of the inclined planes.

10. An LED lamp comprising:

a substrate; and

at least one LED light element;

wherein the substrate comprises a plurality of inclined planes, the inclined planes distributed radially around a central axis of the LED lamp forming a plurality of levels with a plurality of inclination angles; and

wherein at least one of the inclined planes has a different inclination angle from an adjacent inclined plane at the same level; and

wherein at least one of the inclined planes holds the at least one LED light element.

11. The LED lamp of claim 10, wherein the at least one LED light element comprises a plurality of LED light elements.

12. The LED lamp of claim 10, wherein two not adjacent inclined planes of the plurality of inclined planes are separated by one inclined plane of the plurality of inclined planes, the two not adjacent inclined planes having substantially the same inclination angle.

13. The LED lamp of claim 10, wherein a reflector is positioned on the central axis of the LED lamp, the reflector having an outer surface shaped like one or more circular arcs.

14. The LED lamp of claim 10, wherein the levels comprise at least two levels.

15. The LED lamp of claim 10, wherein the inclination angles of the inclined planes are within the range of 10°

to 80°

, the inclination angles of the inclined planes comprising the angle relative to a plane perpendicular to the central axis.

16. The LED lamp of claim 10, wherein the at least one LED light element is a bare chip without packaging.

17. The LED lamp of claim 10, the LED lamp further comprising a heat sink connected with the substrate.

18. The LED lamp of claim 17, wherein that the heat sink includes fin-shaped flanges.

19. The LED lamp of claim 10, wherein the at least one LED light element is located at a junction of at least two of the inclined planes.