Source: http://www.google.com/patents/US7626250?dq=6519629
Timestamp: 2015-05-25 11:44:29
Document Index: 465322256

Matched Legal Cases: ['art.\n6', 'art.\n7', 'art.\n9', 'art 120', 'art 110', 'art 110', 'art 110', 'art 120', 'art 110', 'art 120', 'art 110', 'art 120', 'arts 120', 'art 140', 'art 140', 'art 14', 'art 140']

Patent US7626250 - High power LED package and fabrication method thereof - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsAn LED diode package includes a heat connecting part for mounting a light emitting part on an upper surface thereof, frames electrically connected to the light emitting part while holding the heat connecting part and a molded part fixing the heat connecting part and the frames together. The light emitting...http://www.google.com/patents/US7626250?utm_source=gb-gplus-sharePatent US7626250 - High power LED package and fabrication method thereofAdvanced Patent SearchPublication numberUS7626250 B2Publication typeGrantApplication numberUS 11/445,227Publication dateDec 1, 2009Filing dateJun 2, 2006Priority dateJun 3, 2005Fee statusPaidAlso published asUS7875476, US20060273338, US20100047941Publication number11445227, 445227, US 7626250 B2, US 7626250B2, US-B2-7626250, US7626250 B2, US7626250B2InventorsSeon Goo Lee, Hun Joo Hahm, Jung Kyu Park, Kyung Taeg Han, Seong Yeon Han, Dae Yeon Kim, Young Sam ParkOriginal AssigneeSamsung Electro-Mechanics Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (18), Non-Patent Citations (1), Referenced by (10), Classifications (16), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetHigh power LED package and fabrication method thereof
US 7626250 B2Abstract
An LED diode package includes a heat connecting part for mounting a light emitting part on an upper surface thereof, frames electrically connected to the light emitting part while holding the heat connecting part and a molded part fixing the heat connecting part and the frames together. The light emitting part generates light in response to current applied thereto, and the upper surface of the heat connecting part is protruded beyond an upper surface of the molded part to a predetermined height. This can optimize the unique beam angle of the light source thereby to maximize lighting efficiency as well as prevent overflow of the encapsulating material in the assembling process of the lens, which may otherwise soil adjacent components.
a heat connecting part for mounting a light emitting part on an upper surface thereof, the light emitting part generating light in response to current applied thereto;
frames electrically connected to the light emitting part while holding the heat connecting part; and
a molded part fixing the heat connecting part and the frames together,
wherein the upper surface of the heat connecting part is protruded beyond an upper surface of the molded part to a predetermined height so that the upper surface of the heat connecting part is positioned higher than the upper surface of the molded part, and
the heat connecting part has a holding portion formed in an outer circumference of a body thereof to contact leading ends of the frames, thereby generating holding force for holding the heat connecting part in position,
wherein the holding portion comprises a groove continuously extending around the outer circumference of the heat connecting part body, and the leading ends of the frames are elastically held when insertedly fitted into the groove of the holding portion.
3. The high power light emitting diode package according to claim 1, wherein the heat connecting part is protruded from the upper surface of the molded part to a predetermined height so that light generated from the light emitting part on the heat connecting part has a beam angle of 180� or more.
4. The high power light emitting diode package according to claim 1, wherein the heat connecting part comprises a heat conductive metal member for transferring heat generated from the light emitting part to a board, the heat being generated during light emission of the light emitting part.
6. The high power light emitting diode package according to claim 1, wherein the heat connecting part is extended through the molded part so that the underside surface of the heat connecting part is exposed to the outside through an underside surface of the molded part.
7. The high power light emitting diode package according to claim 1, wherein the heat connecting part has a reflector formed in a top portion thereof where the light emitting part is mounted, the reflector being depressed to a predetermined depth to have an inclined reflecting surface.
8. The high power light emitting diode package according to claim 1, wherein the frames comprise a pair of electrode frames electrically connected with the light emitting part via wires and at least one holder frame electrically isolated from the electrode frames, the holder frame having a leading end contacting and held by the heat connecting part.
9. The high power light emitting diode package according to claim 8, wherein the pair of electrode frames are disposed at both sides of the heat connecting part, opposing each other, and the holder frame is disposed between the electrode frames.
11. The high power light emitting diode package according to claim 8, wherein each of the electrode frames has an upper end exposed to the outside through the upper surface of the molded part, a lower end exposed to the outside through an underside surface of the molded part and a body buried in the molded part, the electrode frame bent to give a height difference between the upper and lower ends.
13. The high power light emitting diode package according to claim 8, wherein the holder frame has an upper end contacting an outer surface of the heat connecting part to generate holding force, a lower end exposed to the outside through the molded part and a body buried in the molded part, the holder frame bent to give a height difference between the upper and lower ends.
18. The high power light emitting diode package according to claim 1, further comprising:
at least one lens capped on an upper section of the molded part to project the light generated from the light emitting part to the outside at an increased beam angle; and
an encapsulating material filled in a space between the molded part and the lens.
20. The high power light emitting diode package according to claim 18, wherein the molded part has a groove formed in the upper surface thereof, the groove receiving the encapsulating material when it is more than filling up the space between the lens and the molded part, thereby preventing the encapsulating material from flowing to the outside.
21. The high power light emitting diode package according to claim 20, wherein the groove is continuously extended along a lower outer circumference of the lens. Description
The present invention has been made to solve the foregoing problems of the prior art and therefore an object of certain embodiments of the present invention is to provide a high power LED package capable of optimally utilizing unique beam angle of a light source, thereby maximizing light efficiency and lighting performance.
Preferably, the pair of electrode frames are disposed at both sides of the heat connecting part opposing each other, and the holder frame is disposed between the electrode frames. More preferably, the holder frame comprises a pair of frames each of which is disposed between the electrode frames.
FIG. 6 b is a front elevation view of the conventional LED package of FIG. 6 a. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The heat connecting part 120 has the light emitting part 110 mounted on the upper surface thereof as shown in FIGS. 1 and 2, and when the light emitting part 110 emits light, serves as a heat radiating means for transferring heat from the light emitting part 110 to the board 190. Thus, the heat connecting part 120 is also referred to as “heat sink slug.”
The light emitting part 110 mounted on the top of the heat connecting part 120 is fixedly bonded to the upper surface of a submount 115 by means of solders such as Au—Sn and Pb—Sn or adhesive such as Ag paste. Alternatively, the light emitting part 110 may be directly mounted on the heat connecting part 120.
The electrode frames 131 are a pair of electrode members disposed opposite to each other at both sides of the heat connecting parts 120 without contacting the latter. Each of the electrode frames 131 is comprised of an upper end 131 a exposed through the upper surface of the molded part 140, a lower end 13 c exposed to the outside through the underside surface of the molded part 140 and a body 131 b buried in the molded part 14 d. The electrode-frame 131 is bent or stepped to give a height difference between the upper and lower ends 131 a and 131 c. The lower end of the electrode frame 131 is extended to a minimum length for achieving electrical connection to a pattern circuit printed on the top of the board 190, and exposed to the outside through the underside surface of the molded part 140.
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