Light emitting diode package and light emitting diode system having at least two heat sinks

• US 8,823,036 B2
• Filed: 06/28/2011
• Issued: 09/02/2014
• Est. Priority Date: 05/28/2003
• Status: Active Grant

• Current Assignee: Seoul Semiconductor Co., Ltd.
• Original Assignee: Seoul Semiconductor Co., Ltd.
• Inventors: Han, Kwan Young, Park, Kwang Il, Cho, Jae Ho, Seo, Jung Hoo, Ryu, Seong Ryeol
• Primary Examiner(s): Tran, Tony
• Application Number:
  US13/170,837
• Publication Number:
  US 20110254045A1
• Time in Patent Office: 1,162 Days
• Field of Search: 257/98, 257/81, 257/82, 257/91, 257/99, 257/100, 257/116, 257/117, 257432-437, 257/749, 257E33056-E33059, 257/E25.032, 257/E33.075
• US Class Current: 257/99
• CPC Class Codes: F21Y 2113/17 forming a single encapsulated light source
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48247 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 2224/49113 the connectors connecting different bonding areas on the semiconductor or solid-state body to a common bonding area outside the body, e.g. converging wires
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• 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 33/642 characterized by the shape
• CPC Class Codes: H01L 33/647 the elements conducting electric current to or from the semiconductor body

Abstract

There is provided a light emitting diode package having at least two heat sinks. The light emitting diode package includes a main body, at least two lead terminals fixed to the main body, and at least two heat sinks of electrically and thermally conductive materials, the heat sinks being fixed to the main body. The at least two heat sinks are separated from each other. Thus, high luminous power can be obtained mounting a plurality of light emitting diode dies in one LED package. Further, it is possible to embody polychromatic lights mounting LED dies emitting different wavelengths of light each other in the LED package.

Claims

1. A light-emitting diode (LED) package, comprising:

a one-piece main body comprising an opening in a bottom surface thereof;

a first heat sink, a second heat sink, and a third heat sink each comprising a thermally conductive material; and

a first light emitting diode die arranged on an upper surface of the first heat sink and a second light emitting diode arranged on an upper surface of the second heat sink; and

a zener diode arranged on an upper surface of the third heat sink,

wherein the first heat sink, the second heat sink, and the third heat sink are spaced apart from each other,

wherein a lower surface of each of the first heat sink, the second heat sink, and the third heat sink is exposed to air by the opening,

wherein the upper surfaces and the lower surfaces are opposite to each other,

wherein the first heat sink the second heat sink, and the third heat sink each comprise a reflective surface integrally formed with and extended from the upper surface thereof,

wherein the lower surface of each of the first heat sink, the second heat sink, and the third heat sink exposed by the opening is wider than the upper surface of each of the first heat sink, the second heat sink, and the third heat sink.

2. The LED package of claim 1, wherein the light emitting diode die is directly connected to either the first heat sink or the second heat sink through a surface of the light emitting diode die.

3. The LED package of claim 1, further comprising a plurality of light emitting diode dies arranged on each of the first heat sink upper surface and the second heat sink upper surface, respectively.

4. The LED package of claim 3, wherein the light emitting diode dies are configured to emit different wavelengths of light from each other.

5. The LED package of claim 3, wherein the light emitting diode dies are configured to emit the same wavelength of light as each other.

6. The LED package of claim 1, wherein the first heat sink and the second heat sink each comprise copper, gold, silver, aluminum, or an alloy thereof.

7. The LED package of claim 1, further comprising a septum integrally formed with the main body, the septum to space apart the first heat sink and the second heat sink.

8. The LED package of claim 7, wherein two opposite sides of the septum contact the main body and an upper surface and lower surface of the septum are exposed outside the main body.

9. The LED package of claim 1, further comprising a lens arranged on the main body, the lens enclosing the light emitting diode die.

10. The LED package of claim 9, wherein the lens comprises an optically transparent material directly contacting the light emitting diode die.

11. The LED package of claim 1, further comprising a lead arranged on the main body, wherein the lead is spaced apart from the first heat sink and the second heat sink.

12. The LED package of claim 11, wherein the light emitting diode die is connected to an upper surface of the lead, and wherein the upper surface of the lead is substantially coplanar with the upper surfaces of the first heat sink and the second heat sink.

13. The LED package of claim 1, wherein the main body surrounds both the first heat sink and the second heat sink.

14. A light-emitting diode (LED) package, comprising:

a main body comprising an opening in a bottom surface thereof;

a first heat sink, a second heat sink, and a third heat sink each comprising a thermally conductive material; and

a first light emitting diode die arranged on an upper surface of the first heat sink and a second light emitting diode arranged on an upper surface of the second heat sink; and

a zener diode arranged on an upper surface of the third heat sink,

wherein the first heat sink, the second heat sink, and the third heat sink are spaced apart from each other,

wherein a lower surface of the first heat sink, a lower surface of the second heat sink, and a lower surface of the third heat sink are exposed to air by the opening, and

wherein the main body does not contact the upper surface of the first heat sink, the upper surface of the second heat sink, and the upper surface of the third heat sink.

15. A light-emitting diode (LED) package, comprising:

a main body comprising an opening in a bottom surface thereof;

a first heat sink, a second heat sink, and a third heat sink each comprising a thermally conductive material; and

a first light emitting diode die arranged on a portion of a first upper surface of the first heat sink, a second light emitting diode die arranged on a portion of a first upper surface of the second heat sink, and a zener diode arranged on a portion of a first upper surface of the third heat sink,

wherein the first heat sink, the second heat sink, and the third heat sink are spaced apart from each other,

wherein a lower surface of each of the first heat sink, the second heat sink, and the third heat sink is exposed to air by the opening, and

wherein the lower surface of the first heat sink, the lower surface of the second heat sink, and the lower surface of the third heat sink are wider than the first upper surface of the first heat sink, the first upper surface of the second heat sink, and the first upper surface of the third heat sink, respectively.