LED ILLUMINATION DEVICE

• US 20090261707A1
• Filed: 03/17/2009
• Published: 10/22/2009
• Est. Priority Date: 04/18/2008
• Status: Active Grant

• Current Assignee: Foxconn Technology Co., Ltd.
• Original Assignee: Foxconn Technology Co., Ltd.
• Inventors: LIU, TAY-JIAN, FANG, YI-CHYNG, LIN, YEU-LIH
• Granted Patent: US 8,053,960 B2
• Time in Patent Office: Days
• US Class Current: 313/46
• 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 29/51 using condensation or evaporation of a fluid, e.g. heat pipes
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 29/76 with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

Abstract

An LED illumination device includes an optical section disposed at a bottom end of the LED illumination device, and in which a light source is provided. A heat dissipation section located adjacent to the optical section includes a plurality of fins thermally contacting the light source. The electrical section is disposed at a top end of the LED illumination device and electrically connects with the light source. The heat dissipation section is disposed between the optical section and the electrical section. The electrical section defines a plurality of air exchanges communicating the inside of the electrical section with the heat dissipation section and a plurality of exhaust ports communicating the inside of the electrical section with an external environment of the LED illumination device.

Claims

1. An LED illumination device, comprising:

an optical section disposed at a bottom end of the LED illumination device, in which a light source is provided;

a heat dissipation section located adjacent to the optical section, comprising a plurality of fins thermally contacting the light source; and

an electrical section disposed at a top end of the LED illumination device and electrically connecting to the light source, wherein the heat dissipation section is disposed between the optical section and the electrical section, the electrical section defines a plurality of air exchanges communicating the electrical section with the heat dissipation section and a plurality of exhaust ports communicating the electrical section with the external environment of the LED illumination device.

2. The LED illumination device of claim 1, wherein the heat dissipation section comprises a heat sink comprising a solid metal base, from which the fins extend radially and outwardly.

3. The LED illumination device of claim 2, wherein the metal base is provided with a blind hole extending vertically from an upper portion toward a lower portion of the metal base, an air venting channel is radially defined in the bottom portion of the metal base and communicates a bottom of the blind hole with an outside of the metal base, and spaces between each two neighboring fins and the blind hole communicate with the electrical section via the air exchanges.

4. The LED illumination device of claim 2, wherein the heat dissipation section further comprises a mounting seat to which the light source is attached and a heat pipe thermally connecting the mounting seat with the heat sink, the heat pipe comprising an evaporating section and at least one condensing section, the metal base defining at least one through hole receiving the at least one condensing section of the heat pipe therein, the evaporating portion being mounted to the mounting seat.

5. The LED illumination device of claim 4, wherein the mounting seat comprises a top mounting block thermally attached to the metal base and a bottom mounting block thermally attached to the light source, the evaporating portion of the heat pipe being sandwiched between the top mounting block and the bottom mounting block.

6. The LED illumination device of claim 1, wherein the heat dissipation section further comprises a mounting seat to which the light source is attached and a heat pipe thermally connecting the mounting seat with the fins, the heat pipe comprising an evaporating section and at least one condensing section, each of the fins comprising a main body perpendicular to the condensing section and defining a vent communicating two opposite sides of each of the fins.

7. The LED illumination device of claim 6, wherein each of the fins further comprises two flanges angling downwards from two opposite edges of the main body, respectively, the vent being defined in each of the flanges.

8. The LED illumination device of claim 1, wherein the electrical section comprises a casing and a mounting plate located on a bottom end of the casing, the mounting plate being arranged between the electrical section and the heat dissipation section, the air exchanges being defined in the mounting plate, the exhaust ports being defined in the casing.

9. The LED illumination device of claim 8, wherein the electrical section further comprises a lamp head located on a top end of the casing and a circuit board received in the casing, the circuit board comprising a plurality of electrical wires extending through the mounting plate and electrically connecting to the light source and a plurality of electrical wires electrically connected to the lamp head, providing operating power from an external power source via the lamp head to the light source.

10. The LED illumination device of claim 9, wherein the circuit board is mounted in the casing through a socket and attached to an inner surface of the casing and a connecting post connecting the circuit board with the socket.

11. The LED illumination device of claim 8, wherein the electrical section further comprises a dustproof cover covering an outer side the exhaust ports of the casing.

12. An LED illumination device, comprising:

an optical section disposed at a bottom end of the LED illumination device, a light source comprising at least one LED being provided in the optical section;

a heat dissipation section located adjacent to the optical section, comprising a plurality of fins thermally contacting the light source; and

an electrical section disposed at a top end of the LED illumination device and electrically connecting to the light source, wherein the heat dissipation section is disposed between the optical section and the electrical section, the electrical section comprises a mounting plate arranged between the electrical section and the heat dissipation section and a casing, the mounting plate defining a plurality of air exchanges communicating an internal of the electrical section with the heat dissipation section, the casing defining a plurality of exhaust ports communicating the internal of the electrical section with an external environment of the LED illumination device.

13. The LED illumination device of claim 12, wherein the heat dissipation section is provided with a heat sink comprising a solid metal base, the fins extending radially and outwardly from the metal base, the metal base is provided with a blind hole extending vertically from a top portion toward a bottom portion of the metal base, spaces between each two neighboring fins and the blind hole communicating with the electrical section via the air exchanges.

14. The LED illumination device of claim 12, wherein the heat dissipation section further comprises a mounting seat to which the light source is attached and a heat pipe thermally connecting the mounting seat with the fins, the heat pipe comprising a condenser section extending from a top end toward a bottom end of the heat dissipation section, and each of the fins comprises a main body perpendicular to the condenser section and defines a vent communicating two opposite sides of the each of the fins.

15. The LED illumination device of claim 12, wherein the heat dissipation section further comprises a mounting seat to which the light source is attached and a heat pipe thermally connecting the mounting seat with the fins, the heat pipe comprising a condenser section extending from a top end toward a bottom end of the heat dissipation section, and each of the fins comprising a main body perpendicular to the condenser section and two flanges angling downwards from two opposite edges of the main body respectively, each of the flanges defining a vent communicating two opposite sides of a corresponding fin.