LED lamp

• US 6,793,374 B2
• Filed: 09/25/2002
• Issued: 09/21/2004
• Est. Priority Date: 09/17/1998
• Status: Expired due to Term

• Current Assignee: Philips Lighting North America Corporation (Koninklijke Philips N.V.)
• Original Assignee: Simon H.A. Begemann
• Inventors: Begemann, Simon H. A.
• Primary Examiner(s): Cariaso, Alan
• Assistant Examiner(s): Lee, Guiyoung
• Application Number:
  US10/254,273
• Publication Number:
  US 20030021113A1
• Time in Patent Office: 727 Days
• Field of Search: 362/231, 362/226, 362/800, 362/249, 362/545, 362/251, 362/547, 362/555, 362/552, 362/294, 362/806
• US Class Current: 362/294
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21S 8/036 by means of a rigid support, e.g. bracket or arm
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21V 3/00 Globes; Bowls; Cover glasses with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506
• CPC Class Codes: F21W 2131/10 Outdoor lighting
• 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]
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

An LED lamp has a gear column, which is connected between a cap and substrates. The substrates are arranged as a polyhedron with planar surfaces. Each surface has at least one LED. The gear column also has a heat-dissipater, which interconnects the substrates and the lamp cap.

Claims

1. A lamp comprising:

a column;

a cap which is connected to a first end of the column;

a substrate which is connected to a second end of the column;

at least one LED provided on said substrate;

wherein the column is surrounded by and exposed in a space within an envelope of the lamp and configured to dissipate heat from the substrate to the cap, and

wherein the column includes a heat sink to dissipate said heat.

2. A lamp comprising:

a column;

a cap which is connected to a first end of the column;

a substrate which is connected to a second end of the column; and

at least one LED provided on said substrate;

wherein the column is configured to dissipate heat from the substrate to the cap, and

wherein the column includes a metal connection between said substrate and said cap to dissipate said heat.

3. A lamp comprising:

a column;

a cap which is directly connected to a first end of the column;

a substrate which is connected to a second end of the column; and

at least one LED provided on said substrate, the column comprising

a heat sink to dissipate heat from the substrate to the cap.

4. A lamp comprising:

a column;

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a cap which is connected to a first end of the column;

a substrate which is connected to a second end of the column;

at least one LED provided on said substrate; and

a heat sink to dissipate heat from the substrate to the cap,

wherein the heat sink includes a metal connection between said substrate and said cap to dissipate said heat.

5. A LED lamp comprising a gear column, a lamp cap which is connected to an end of the gear column and a substrate which is connected to the other end of the gear column, wherein the substrate includes at least one LED and wherein the gear column comprises heat-dissipating means interconnecting the substrate and the lamp cap, wherein said gear column has an inlet aperture and an outlet aperture for air flow.

6. A lamp comprising:

a column;

a cap which is connected to a first end of the column;

a substrate which is connected to a second end of the column;

at least one LED provided on said substrate;

wherein the column is configured to dissipate heat from the substrate to the cap, and

wherein said column has an inlet aperture and an outlet aperture for air flow.

7. A lamp comprising:

a column;

a cap which is connected to a first end of the column;

a substrate which is connected to a second end of the column;

at least one LED provided on said substrate; and

a heat sink to dissipate heat from the substrate to the cap,

wherein said heat sink has an inlet aperture and an outlet aperture for air flow.

8. A LED lamp comprising a gear column, a lamp cap which is connected to an end of the gear column and a substrate which is connected to the other end of the gear column, wherein the substrate includes at least one LED and wherein the gear column comprises heat-dissipating means interconnecting the substrate and the lamp cap, further comprising an envelope connected to said lamp cap and enclosing said gear column and said substrate, wherein said gear column has an inlet aperture and an outlet aperture for air flow exclusively within said envelope.

9. A lamp comprising:

a column;

a cap which is connected to a first end of the column;

a substrate which is connected to a second end of the column;

at least one LED provided on said substrate;

wherein the column is configured to dissipate heat from the substrate to the cap;

further comprising an envelope connected to said cap and enclosing said column and said substrate,

wherein said column has an inlet aperture and an outlet aperture for air flow exclusively within said envelope.

10. A lamp comprising:

a column;

a cap which is connected to a first end of the column; and

a substrate which is connected to a second end of the column;

at least one LED provided on said substrate; and

a heat sink to dissipate heat from the substrate to the cap, further comprising an envelope connected to said cap and enclosing said heat sink and said substrate,

wherein said heat sink has an inlet aperture and an outlet aperture for air flow exclusively within said envelope.

11. An LED lamp comprising a gear column, a lamp cap which is connected to an end of the gear column and two or more substrates connected to the other end of the gear column, wherein each said substrate includes at least one face, each said face including at least one LED and being disposed at an angle to the other said faces, at least two of said faces containing respective ones of the at least one LEDs each of which emit light in a different direction and the gear column comprises heat-dissipating means interconnecting said substrates and the lamp cap, the lamp being provided with means for mutually varying the luminous flux of the at least one LED provided on one of said faces relative to the luminous flux of the at least one LED on another of said faces.