LIGHT BULB

• US 20120320591A1
• Filed: 09/25/2011
• Published: 12/20/2012
• Est. Priority Date: 06/17/2011
• Status: Abandoned Application

• Current Assignee: Enlight Corporation
• Original Assignee: Enlight Corporation
• Inventors: LIAO, CHIH-MING, CHUANG, CHI-FU, CHAN, CHAO-KUN, HUANG, JIH-SHENG
• Application Number:
  US13/244,523
• Publication Number:
  US 20120320591A1
• Time in Patent Office: Days
• US Class Current: 362/249.02
• 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: F21V 23/009 the casing being inside the housing of the lighting device
• 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 29/773 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 2107/00 Light sources with three-dimensionally disposed light-generating elements
• 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

The instant disclosure relates to a light bulb, which includes a base, a conducting cap arranged on one end of the base, a heat-dissipating member disposed on the opposite end of the base, and a lamp cover. The heat-dissipating member has a wedged structure, and a plurality of inclined surfaces are formed adjacently thereon. A plurality of LEDs is disposed on the inclined surfaces, and the lamp cover is arranged over the wedged structure and the LEDs. The instant disclosure uses the LEDs to replace tungsten filament as the light sources, and arranging the LEDs on the wedged structure of the heat-dissipating member. Thereby, the light bulb can have higher heat-dissipating rate.

Claims

1. A light bulb, comprising:

a base;

a threaded conducting cap disposed on one end of the base;

a heat-dissipating member disposed on the other end of the base opposite of the conducting cap, wherein the heat-dissipating member includes a wedged structure defined by a plurality of adjacently-joined inclined surfaces;

a plurality of light-emitting diodes (LEDs) selectively and respectively disposed on each of the inclined surfaces; and

a lamp cover enclosingly disposed over the wedged structure and the LEDs.

2. The light bulb of claim 1, wherein each LED has an aluminum substrate arranged on the corresponding inclined surface.

3. The light bulb of claim 1, wherein the heat-dissipating member has a main body formed integrally with the wedged structure, and wherein the lamp cover is disposed on the main body.

4. The light bulb of claim 3, wherein a plurality of heat-dissipating fins is arranged on the periphery of the main body.

5. The light bulb of claim 1, wherein the wedged structure has a substantially regular polygonal base.

6. The light bulb of claim 1, wherein the lamp cover is ball or oval shaped.

7. The light bulb of claim 2, wherein the heat-dissipating member has a main body formed integrally with the wedged structure, and wherein the lamp cover is disposed on the main body.

8. The light bulb of claim 7, wherein a plurality of heat-dissipating fins is arranged on the periphery of the main body.

9. The light bulb of claim 2, wherein the wedged structure has a substantially regular polygonal base.

10. The light bulb of claim 2, wherein the lamp cover is ball or oval shaped.

11. The light bulb of claim 2, wherein a flat top surface is formed centrally on the converging portion of the wedged structure, and wherein a separate LED is disposed on the flat top surface and covered by the lamp cover.

12. The light bulb of claim 11, wherein the heat-dissipating member has a main body formed integrally with the wedged structure, and wherein the lamp cover is disposed on the main body.

13. The light bulb of claim 12, wherein a plurality of heat-dissipating fins is arranged on the periphery of the main body.

14. The light bulb of claim 11, wherein the wedged structure has a substantially regular polygonal base.

15. The light bulb of claim 11, wherein the lamp cover is ball or oval shaped.

16. The light bulb of claim 11, wherein the LED includes an aluminum substrate arranged on the flat top surface.

17. The light bulb of claim 16, wherein the heat-dissipating member has a main body formed integrally with the wedged structure, and wherein the lamp cover is disposed on the main body.

18. The light bulb of claim 17, wherein a plurality of heat-dissipating fins is arranged on the periphery of the main body.

19. The light bulb of claim 16, wherein the wedged structure has a substantially regular polygonal base.

20. The light bulb of claim 16, wherein the lamp cover is ball or oval shaped.