LED LAMP

• US 20110133622A1
• Filed: 03/29/2010
• Published: 06/09/2011
• Est. Priority Date: 12/04/2009
• Status: Active Grant

• Current Assignee: Foxconn Technology Co., Ltd., Fuzhun Precision Industry Company Limited (Foxconn Technology Co., Ltd.)
• Original Assignee: Foxconn Technology Co., Ltd., Fuzhun Precision Industry Company Limited (Foxconn Technology Co., Ltd.)
• Inventors: MO, CI-JIN, CHEN, CHIN-CHUNG
• Granted Patent: US 8,083,374 B2
• Time in Patent Office: Days
• US Class Current: 313/46
• 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 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/773 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

An LED lamp includes a heat sink including a supporting plate, a plurality of LEDs mounted on the supporting plate and a plurality of protruding blocks extending upwardly from a top face of the supporting plate. The protruding blocks have inclined faces oriented upwardly and outwardly away from the top face of the supporting plate. The LEDs includes a plurality of first LEDs disposed on a bottom face of the supporting plate and a plurality of second LEDs disposed on the inclined faces of the protruding blocks, whereby at least a portion of light generated from the second LEDs projects towards a lateral side of the LED lamp.

Claims

1. An LED lamp comprising:

a heat sink comprising a supporting plate;

a plurality of LEDs mounted on the supporting plate, and the LEDs comprising a plurality of first LEDs disposed on a bottom face of the supporting plate and a plurality of second LEDs; and

a plurality of protruding blocks extending upwardly from a top face of the supporting plate, and each of the protruding blocks having an inclined face oriented upwardly and outwardly away from the top face of the supporting plate;

wherein the second LEDs are disposed on the inclined faces of the protruding blocks, whereby at least a portion of light generated from the second LEDs projects towards a lateral side of the LED lamp.

2. The LED lamp as described in claim 1, wherein an acute intersection angle is formed between each inclined face and the top face of the supporting plate.

3. The LED lamp as described in claim 1, wherein the inclined faces face radially and outwardly relative to a center of the supporting plate.

4. The LED lamp as described in claim 1, wherein the inclined faces are centrosymmetrical relative to a center of the supporting plate.

5. The LED lamp as described in claim 1, wherein each of the protruding blocks is wedge-shaped.

6. The LED lamp as described in claim 5, wherein each of the protruding blocks has a configuration like a triangular prism.

7. The LED lamp as described in claim 1 further comprising a mounting member for receiving a driving module therein.

8. The LED lamp as described in claim 7 further comprising a tubular second envelope disposed on the top face of the supporting plate and enclosing the second LEDs and the protruding blocks therein, wherein the second envelope is hermetically sandwiched between the supporting plate and the mounting member.

9. The LED lamp as described in claim 1, wherein an annular receiving groove is recessed from a periphery of the bottom face of the supporting plate, a sealing gasket being received in the annular receiving groove.

10. The LED lamp as described in claim 9 further comprising a first envelope which comprises a bowl-shaped body and an engaging flange extending outwardly from a periphery of the body, and the engaging flange is fixed to the bottom face of the supporting plate of the heat sink defining the receiving groove.

11. The LED lamp as described in claim 10 further comprising an annular pressing frame disposed on the engaging flange of the first envelope for securing the first envelope to the heat sink.

12. The LED lamp as described in claim 10 further comprising a protecting cage covering an outer face of the first envelope, the protecting cage comprising a plurality of wires interlaced with each other.

13. The LED lamp as described in claim 1, wherein the light emitted from the first LEDs is radiated downwardly and the light emitted from the second LEDs is radiated also upwardly.

14. The LED lamp as described in claim 1 further comprising a light-guiding module disposed over the first LEDs, the light-guiding module comprising a plurality of lenses each disposed over one of the first LEDs and a securing board securing the lenses in position over the first LEDs.