LED LAMP

• US 20100264799A1
• Filed: 08/12/2009
• Published: 10/21/2010
• Est. Priority Date: 04/20/2009
• Status: Abandoned Application

• 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: ZHANG, NA, LIU, TAY-JIAN, TIAN, FENG
• Application Number:
  US12/540,332
• Publication Number:
  US 20100264799A1
• Time in Patent Office: Days
• US Class Current: 313/46
• CPC Class Codes: F21K 9/23 Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
• CPC Class Codes: F21K 9/238 Arrangement or mounting of circuit elements integrated in the light source
• CPC Class Codes: F21V 23/006 the substrate being distinct from the light source holder
• CPC Class Codes: F21V 29/503 of light sources cooling arrangements structurally associated with gas-discharge or vapour-discharge lamps H01J61/52; cooling arrangements structurally associated with electric incandescent lamps H01K1/58; cooling arrangements structurally associated with light-emitting diodes H01L33/64
• CPC Class Codes: F21V 29/77 with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: F21Y 2107/40 on the sides of polyhedrons, e.g. cubes or pyramids
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

An LED lamp includes a hollow lamp housing, a front optical part, a rear electrical part provided with a circuit board, and a middle heat dissipation part. The heat dissipation part includes a heat sink, and a mounting seat located in front of and thermally connected to the heat sink. The lamp housing defines a plurality of air exchanging holes therein. The mounting seat is in the form of a polyhedron, and has a polyhedral rear end surface and a plurality of heat absorbing surface. The optical part includes a plurality of light sources respectively arranged on the heat absorbing surfaces, a light reflector located between the heat sink and the light sources, and an optical lens located in front of the light reflector. The heat absorbing surfaces extend forwardly from a peripheral edge of the rear end surface towards the optical lens and facing the optical lens.

Claims

1. An LED lamp, comprising:

a hollow lamp housing;

an optical part located at a front end of the lamp housing, the optical part comprising a plurality of light sources each being provided with at least one LED, a light reflector and an optical lens;

an electrical part located at a rear end of the lamp housing, the electrical part being provided with a circuit board electrically connecting with the light sources; and

a heat dissipation part located between the optical part and the electrical part, the heat dissipation part comprising;

a heat sink arranged in the lamp housing and comprising a plurality of fins, the lamp housing defining a plurality of air exchanging holes therein corresponding to the fins of the heat sink; and

a mounting seat located in front of the heat sink and thermally connected to the heat sink, the mounting seat being in the form of a polyhedron, the mounting seat having a polyhedral rear end surface facing the heat sink and a plurality of heat absorbing surfaces extending from the rear end surface, the light sources being respectively arranged on and thermally connected with the heat absorbing surfaces, heat generated by the light sources being absorbed by the mounting seat and then transferred to the heat sink for dissipation, the light reflector of the optical part being located between the heat sink and the light sources and optically isolating the light sources from the heat sink, the light reflector forming a light reflecting surface at a front side thereof facing the light sources, the optical lens being located in front of the light reflector and the mounting seat, the light reflector and the optical lens cooperatively receiving the mounting seat and the light sources therein, the heat absorbing surfaces extending forwardly from a peripheral edge of the rear end surface of the mounting seat towards the optical lens and facing the optical lens.

2. The LED lamp of claim 1, wherein the mounting seat has a configuration of a frustum of a pyramid and further comprises a front end surface facing the optical lens, each of the heat absorbing surfaces extending slantingly from the rear end surface to the front end surface, a cross-sectional area of the mounting seat being gradually decreased from the rear end surface to the front end surface of the mounting seat.

3. The LED lamp of claim 2, wherein the optical part further comprises a light source attached on the front end surface of the mounting seat.

4. The LED lamp of claim 1, wherein the mounting seat has a configuration of a pyramid, the heat absorbing surfaces being sloping and converging at a point.

5. The LED lamp of claim 1, wherein the mounting seat has a configuration of a prism and further comprises a front end surface facing the optical lens, each of heat absorbing surfaces extending from the rear end surface to the front end surface and perpendicular to the front and rear end surfaces.

6. The LED lamp of claim 1, wherein an angle between the rear end surface and each of the absorbing surfaces is not greater than 90 degrees.

7. The LED lamp of claim 1, wherein an angle between the rear end surface and each of the absorbing surfaces is less than 90 degrees.

8. The LED lamp of claim 1, wherein the mounting seat forms a reflecting plate between two adjacent light sources which are mounted on two corresponding adjacent heat absorbing surfaces thereof.

9. The LED lamp of claim 8, wherein the reflecting plate is connected to a joint of the two corresponding adjacent heat absorbing surfaces of the mounting seat.

10. The LED lamp of claim 1, wherein the heat sink further comprises a solid base, the fins of the heat sink extending radially and outwardly from a circumferential surface of the solid base, the heat connecting member being connected to the solid base of the heat sink.

11. The LED lamp of claim 10, wherein the mount seat is directly attached to the solid base of the heat sink, the light reflector being plate-shaped and surrounding the mounting seat.

12. The LED lamp of claim 1, wherein the heat dissipation part further comprises a heat pipe connecting the mounting seat with the heat sink, the heat pipe comprising a front evaporating section inserted in the mounting seat and a rear condensing section inserted in the heat sink.

13. The LED lamp of claim 12, wherein the heat sink further comprises a solid base, the fins of the heat sink extending radially and outwardly from a circumferential surface of the solid base, the rear condensing section of the heat pipe being inserted in the solid base of the heat sink.

14. The LED lamp of claim 12, wherein a free end of the evaporating section of the heat pipe extends forwardly beyond a front end of the mounting seat.

15. The LED lamp of claim 12, wherein the light reflector has a configuration of a dishware and comprises a planar mounting portion surrounding the evaporating section of the heat pipe and a tapered reflecting portion extending forwardly and outwardly from an outer peripheral edge of the mounting portion towards the optical lens.

16. The LED lamp of claim 1, wherein the heat dissipation part further comprises a cooling fan provided between the electrical part and the heat sink, the lamp housing further defining radially a plurality of air openings in a rear end thereof adjacent to the electrical part, the air openings functioning as air passage openings for the cooling fan.

17. The LED lamp of claim 1, wherein the lamp housing comprises a front shell and a rear shell connected to a rear end of the front shell, the optical part being arranged in front of the front shell, the heat dissipation part being arranged in the front shell, the electrical part being arranged in the rear shell.

18. The LED lamp of claim 17, wherein the front shell is a hollow cylinder and the rear shell is cup-shaped, a plurality of air apertures being defined radially through the rear shell for airflow flowing into and out of the rear shell.

19. The LED lamp of claim 17, wherein the heat dissipation part further comprises a partition plate arranged between the circuit board and the heat sink, the partition plate defining therein a plurality of air openings which communicate the heat dissipation part with the electrical part.