Led array module

• US 20070001582A1
• Filed: 06/23/2006
• Published: 01/04/2007
• Est. Priority Date: 07/01/2005
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Original Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Inventors: Shin, Su-ho, Shin, Kyu-ho, Choi, Seung-tae, Kwon, Ki-hwan, Kweon, Soon-cheol, Moon, Chang-youl
• Granted Patent: US 8,002,443 B2
• Time in Patent Office: Days
• US Class Current: 313/498
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21V 29/51 using condensation or evaporation of a fluid, e.g. heat pipes
• CPC Class Codes: F21V 29/52 electrically powered, e.g. refrigeration systems
• CPC Class Codes: F21V 29/67 characterised by the arrangement of fans
• CPC Class Codes: F21V 29/677 the fans being used for discharging
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/73265 Layer and wire connectors
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 33/648 the elements comprising fluids, e.g. heat-pipes
• CPC Class Codes: H05K 1/0203 Cooling of mounted components H05K1/0272 takes precedence
• CPC Class Codes: H05K 1/0272 Adaptations for fluid transport, e.g. channels, holes
• CPC Class Codes: H05K 2201/10106 Light emitting diode [LED]

Abstract

A light emitting diode (LED) array module includes a plurality of LEDs; and a substrate which mounts the LEDs and has a built-in cooling device for cooling heat generated when the LED is driven. The cooling device includes a heat radiation space formed on the substrate and a minute passage member which is wick- or mesh-structured to form a plurality of minute passages that operate by a heat pipe principle in the heat radiation space. The cooling device operating by the heat pipe principle is integrally formed on the substrate mounted with the LEDs, so heat radiation performance of the LEDs is enhanced, such that the LEDs can operate stably for a long time.

Claims

1. A light emitting diode (LED) array module comprising:

a plurality of LEDs; and

a substrate which mounts the LEDs and has a built-in cooling device for cooling heat generated when the LEDs are driven.

2. The LED array module of claim 1, wherein the cooling device uses a heat pipe principle.

3. The LED array module of claim 1, wherein the cooling device uses a fluid circulation structure.

4. A light emitting diode (LED) array module comprising:

a plurality of LEDs;

a substrate which mounts the LEDs and forms a heat radiation space therein; and

a minute passage member disposed in the heat radiation space and which provides a plurality of minute passages that operate by a heat pipe principle for heat radiation of the LEDs.

5. The LED array module of claim 4, wherein there is at least one the heat radiation space.

6. The LED array module of claim 4, wherein the minute passage member is one of wick- and mesh-structured.

7. The LED array module of claim 4, further comprising:

a cover attached to the substrate to cover up the heat radiation space.

8. The LED array module of claim 4, wherein the substrate is formed with a conductive pattern with an insulating layer interposed therebetween, and the conductive pattern and the LEDs are electrically connected, and

further comprising a lens for protecting the LEDs and inducing light radiated by the LEDs in a predetermined direction.

9. The LED array module of claim 4, further comprising:

a heat sink attached to opposite sides of the substrate for heat radiation of the substrate; and

a fan for cooling the heat sink.

10. A light emitting diode (LED) array module comprising:

a plurality of LEDs;

a substrate which mounts the LEDs and forms a plurality of built-in minute passages that operate as a heat pipe principle for heat radiation of the LEDs; and

a cover attached to the substrate to cover up the minute passages.

11. The LED array module of claim 10, wherein the minute passages are approximately 100 μ

m wide.

12. The LED array module of claim 10, wherein the substrate is formed with a conductive pattern with an insulating layer interposed therebetween, and the conductive pattern and the LEDs are electrically connected, and

further comprising a lens for protecting the LEDs and inducing light radiated by the LEDs in a predetermined direction.

13. The LED array module of claim 10, further comprising:

a heat sink attached to opposite sides of the substrate for heat radiation of the substrate; and

a fan for cooling the heat sink.

14. A light emitting diode (LED) array module comprising:

a plurality of LEDs;

a substrate which mounts the LEDs and forms a built-in substrate passage where a fluid circulates for heat radiation of the LEDs; and

a fluid circulating unit which circulates the fluid through the substrate passage.

15. The LED array module of claim 14, wherein the fluid circulating unit comprises:

a fluid storing unit connected to the substrate passage by a circulating passage;

a pump disposed in the circulating passage; and

a cooling unit for heat radiation of the fluid storing unit.

16. The LED array module of claim 14, wherein the fluid circulating through the substrate passage is one of water, an alcohol and an inactive liquid.

17. The LED array module of claim 15, wherein the cooling unit comprises:

a heat sink attached to the fluid storing unit; and

a fan cooling the heat sink.

18. The LED array module of claim 14, wherein the substrate is formed with a conductive pattern with an insulating layer interposed therebetween, and the conductive pattern and the LEDs are electrically connected, and

further comprising a lens for protecting the LEDs and inducing light radiated by the LEDs in a predetermined direction.