Solid-state lamps with improved radial emission and thermal performance

• US 8,992,051 B2
• Filed: 10/05/2012
• Issued: 03/31/2015
• Est. Priority Date: 10/06/2011
• Status: Active Grant

• Current Assignee: Intematix Corporation
• Original Assignee: Intematix Corporation
• Inventors: Yang, Haitao, Lee, Hyung-Chul, Edwards, Charles, Li, Yi-Qun
• Primary Examiner(s): Patel, Ashok
• Application Number:
  US13/646,591
• Publication Number:
  US 20130176724A1
• Time in Patent Office: 907 Days
• Field of Search: None
• US Class Current: 362/294
• CPC Class Codes: F21K 9/23 Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
• CPC Class Codes: F21K 9/62 using mixing chambers, e.g. housings with reflective walls
• CPC Class Codes: F21K 9/64 using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
• CPC Class Codes: F21V 29/713 in direct thermal and mechanical contact of each other to form a single system
• CPC Class Codes: F21V 29/717 using split or remote units thermally interconnected, e.g. by thermally conductive bars or heat pipes
• 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: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21V 3/02 characterised by the shape
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A solid-state lamp is described that includes a wavelength conversion component located at one end of the lamp. The solid-state lamp comprises: one or more solid-state light emitting devices (typically LEDs); a thermally conductive body; at least one duct; and a photoluminescence wavelength conversion component remote to the one or more LEDs, located at one end of the lamp. The lamp is configured such that the duct extends through the photoluminescence wavelength conversion component and defines a pathway for thermal airflow through the thermally conductive body to thereby provide cooling of the body and the one or more LEDs.

Claims

1. A lamp, comprising:

at least one solid-state light emitting device;

a thermally conductive body in thermal communication with the at least one solid-state light emitting device;

at least one duct comprising at least a first opening and a second opening, the at least one duct providing cooling to the thermally conductive body; and

a photoluminescence wavelength conversion component remote to the at least one solid state light emitting device and mounted to one end of the lamp.

2. The lamp of claim 1, wherein the component comprises an annular shape.

3. The lamp of claim 1, wherein the component comprises an opening to receive the duct.

4. The lamp of claim 1, wherein the lamp comprises a mixing chamber base, the mixing chamber base having an inner wall, an outer wall, and a floor.

5. The lamp of claim 4, wherein a combination of the mixing chamber base and the component forms a mixing chamber.

6. The lamp of claim 4, wherein the mixing chamber base comprises reflective surfaces.

7. The lamp of claim 1, wherein the thermally conductive body further comprises a cavity and wherein the cavity and the at least one duct define a pathway for thermal airflow through the thermally conductive body.

8. The lamp of claim 7, wherein passageways extend through to openings located at the end of the lamp.

9. The lamp of claim 7, wherein the cavity comprises a plurality of openings.

10. The lamp of claim 9, wherein at least one of the plurality of openings is positioned on a side surface of the body.

11. The lamp of claim 9, and further comprising circumferentially spaced heat radiating fins on the thermally conductive body and wherein at least one of the plurality of openings are located between the heat radiating fins.

12. The lamp of claim 1, wherein the duct and the body comprise separate components.

13. The lamp of claim 1, and further comprising a light diffusive component.

14. The lamp of claim 13, wherein the light diffusive component is integrated with the component.