Illumination device

• US 8,696,168 B2
• Filed: 04/16/2012
• Issued: 04/15/2014
• Est. Priority Date: 04/26/2011
• Status: Active Grant

• Current Assignee: Lite-On Electronics Company Limited (Lite-On Technology Corporation)
• Original Assignee: Lite-On Electronics Company Limited (Lite-On Technology Corporation), Lite-On Technology Corporation
• Inventors: Hsu, Shih-Chang, YU, CHIN YIN, LI, PO-WEI, LEE, TSUNG-CHI
• Primary Examiner(s): Neils, Peggy A.
• Application Number:
  US13/447,347
• Publication Number:
  US 20120275170A1
• Time in Patent Office: 729 Days
• Field of Search: 362/249.02, 362/294, 362/373
• US Class Current: 362/294
• 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 29/773 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21V 3/00 Globes; Bowls; Cover glasses with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

An illumination device having enhanced thermal dissipating capacity is provided. The illumination device includes a heat sink, an LED module, a cover, an LED driver, and a lamp base. The LED module is disposed at one end of the heat sink. The cover covers the LED module. The LED driver is in connection with the LED module, and includes a circuit board and at least one electrical contact member disposed on the circuit board. The lamp base is connected to the other end of the heat sink, and comprises an insulating unit, a first electrode, a second electrode and at least one contact port. The contact port is arranged on the lateral interior of the insulating unit, so that the electrical contact member of the LED driver may establish electrical connection with the lamp base.

Claims

1. An illumination device, comprising:

a heat sink having two ends;

a light module disposed at one end of the heat sink;

a cover covering the light module;

a driver received in the heat sink and in connection with the light module for driving the light module, the driver having a circuit board and at least one electrical contact member disposed on the circuit board; and

a lamp base connected to the other end of the heat sink, comprising

an insulating unit having a ring member, a sleeve member, and a shield member, the ring member being disposed on the sleeve member;

a first electrode and a second electrode separately disposed on an outer surface of the sleeve member, the ring member contacting with the other end of the heat sink and isolating the heat sink from the first and second electrodes, the shield member covering an outer surface of the first electrode; and

at least one contact port arranged on an inner surface of the insulating unit;

wherein the contact port enables part of the first electrode and the second electrode to expose there-from so that the electrical contact member of the driver is allowed to detachably connect to the lamp base.

2. The illumination device as claim 1, wherein the heat sink further comprises an accommodation portion for receiving the driver and a plurality of fins outward extended from the accommodation portion for dissipating heat generated by the light module and the driver.

3. The illumination device as claim 1, further comprising:

a pair of isolating members disposed between the first electrode and the second electrode for isolating from each other, the pair of isolating members is fixed at the outer surface of the sleeve member.

4. The illumination device as claim 1, further comprising

an isolating member disposed between the first electrode and the second electrode and isolating from each other,

wherein the first electrode, the second electrode and the isolating member cooperatively form a fixing structure for fixing the driver in the lamp base.

5. The illumination device as claim 1, wherein the first electrode has a first contact branch;

the second electrode has a second contact branch;

the first contact branch and the second branch are extended through the contact port for contacting with the electrical contact member of the driver.

6. The illumination device as claim 1, wherein insulating unit further comprises a first positioning member and a second positioning member corresponding to the first positioning member, a first contact branch of the first electrode is disposed on an inner surface of the first positioning member, a second branch of the second electrode is disposed on an inner surface of the second positioning member.

7. The illumination device as claim 6, wherein the first positioning member and the second positioning member are disposed on an inner surface of the sleeve member, or on an inner surface of the ring member.

8. The illumination device as claim 1, wherein the electrical contact member comprises two pins having different polarities, the two pins are disposed on the side portion of the circuit board for constructing an electrical connection between the driver and the first and second electrodes, one of the two pins contacts with the first electrode, the other one of the two pins contacts with the second electrode.

9. The illumination device as claim 1, wherein the electrical contact member comprises two recessive terminals, the two recessive terminals are respectively disposed on a top surface and bottom surface of the circuit board for constructing an electrical connection between the driver and the first and second electrodes, one of the two recessive terminals contacts with the first electrode exposed from the contact port, the other one of the two recessive terminals contacts with the second electrode exposed from the contact port.

10. The illumination device as claim 1, wherein two contact ports are formed on the inner surface of the insulating unit, one of the two contact ports exposes the first electrode;

and the other one of the two contact ports exposes the second electrode.

11. The illumination device as claim 10, wherein the electrical contact member comprises two pins with different polarities, the two pins are respectively disposed on two side portions of the circuit board corresponding to the two contact ports, one of the two pin contacts with the first electrode exposed from one of the two contact ports, the other one of the two pins contacts with the second electrode exposed from the other one of the two contact ports.

12. The illumination device as claim 10, wherein the electrical contact member comprises two recessive terminals with different polarities, the two recessive terminals are respectively disposed on two opposite surfaces of the circuit board, one of the recessive terminals with positive polarity is contacted with the first electrode exposed from one of the two contact ports, the other one of the recessive terminals with negative polarity is contact with the second electrode exposed form the other one of the two contact ports.

13. The illumination device as claim 1, wherein the insulating unit comprises a pair of first positioning members and a pair of second positioning members, the driver is inserted into the lamp base to construct an electrical connection through the pair of first positioning members and the pair of second positioning members.

14. The illumination device as claim 1, wherein the insulating unit is made of ceramic material.

15. The illumination device as claim 1, wherein each of the first and the second electrodes includes a substantially half-cylindrical main body, wherein the first electrode includes an arm extending from the main body and a contact portion located at one end of the arm, wherein an outer surface of the main body of the second electrode is configured to expose from the insulating unit.

16. The illumination device as claim 15, wherein the shield member of the insulating unit further contains a hemi-cylinder and a hemi-circular disc, the hemi-cylinder shielding outside surface of the first electrode, the hemi-circular disc shielding the arm of the first electrode.

17. The illumination device as claim 15, wherein the illumination device further comprises a screw unit encompassing the insulating unit, the screw unit contacts outside surface of the main body of the second electrode, the contact portion of the arm extending to a bottom portion of the screw unit.

18. The illumination device as claim 1, wherein part of second electrode and shield member are formed with a plurality of thread patterns, so that the lamp base is directly screwed into a lamp socket.

19. An illumination device, comprising:

a heat sink having two ends;

a light module disposed at one end of the heat sink;

a cover covering the light module;

a driver received in the heat sink and in connection with the light module for driving the light module, the driver including a circuit board and at least one electrical contact member disposed on the circuit board; and

a lamp base connected to the other end of the heat sink, the lamp base including

an insulating unit, wherein at least one contact port is arranged on an inner surface of the insulating unit; and

a first electrode and a second electrode separately disposed on an outer surface of the insulating unit and exposed from the contact port;

wherein when the driver is plugged into the contact port of the lamp base, the electrical contact member contacts the first and second electrodes exposed from the contact port so as to establish electrical connection.

20. The illumination device as claim 19, wherein the insulating unit comprises a ring member, a sleeve member and a shield member, the ring member is disposed on the sleeve member for isolating the heat sink from the first and second electrodes, the first and second electrodes are disposed on an outer surface of the sleeve member, and the first electrode is sandwiched between the outer surface of the sleeve member and the shield member.