LED lamp and production method of the same

• US 8,366,503 B2
• Filed: 02/27/2009
• Issued: 02/05/2013
• Est. Priority Date: 03/21/2008
• Status: Expired due to Fees

• Current Assignee: Liquidleds Lighting Corp.
• Original Assignee: Liquidleds Lighting Corp.
• Inventors: Chiang, Kun-Yuan
• Primary Examiner(s): Patel, Ashok
• Application Number:
  US12/394,079
• Publication Number:
  US 20090236992A1
• Time in Patent Office: 1,439 Days
• Field of Search: None
• US Class Current: 445/23
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21K 9/90 Methods of manufacture
• CPC Class Codes: F21V 29/58 characterised by the coolants
• 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 LED lamp including a glass lampshell and a stem assembly with one end inserted into the glass lampshell. The stem assembly comprises a glass trumpet tube with one end sealed within the glass lampshell to form a cavity within the glass lampshell and within the cavity a supporting component connected to the glass trumpet tube and supporting an LED emitter. The stem assembly further comprises a wire encompassed within the glass trumpet tube. The wire has one end extending outside of the cavity and the other end electrically connected to the LED emitter.

Claims

1. A method for producing an LED lamp, comprising:

forming a stem assembly by using a glass trumpet tube to encompass an exhaust pipe and a wire;

connecting a supporting component to said glass trumpet tube;

installing an LED emitter on said supporting component;

electrically connecting said LED emitter to said wire; and

while maintaining an open end of a glass lampshell in a direction substantially opposite to the direction of gravity,

inserting the end of said stem assembly with said LED emitter into said glass lampshell;

heating said glass lampshell to have said glass trumpet tube sealed within said glass lampshell so as to form a cavity within said glass lampshell; and

maintaining an end of said exhaust pipe and an end of said wire outside of said cavity after the heating.

2. The method of claim 1, further comprising rotating the glass lampshell and the stem assembly synchronously while heating the glass lampshell.

3. The method of claim 1, further comprising electrically connecting the wire to a temperature control component.

4. The method of claim 3, wherein the temperature control component is selected from a group consisting of thermo-resister of positive temperature coefficient, compound metal temperature switch, and a combination thereof.

5. The method of claim 1, further comprising sealing the exhaust pipe.

6. The method of claim 5, further comprising removing the air within the cavity via the exhaust pipe before the exhaust pipe is sealed.

7. The method of claim 5, further comprising filling the cavity with a liquid via the exhaust pipe before the exhaust pipe is sealed.

8. The method of claim 7, wherein the liquid is light-pervious.

9. The method of claim 7, wherein the liquid is selected from liquids with a light refraction index of between 1.3 and 1.6.

10. The method of claim 7, wherein the liquid is selected from liquids with a specific gravity of between 0.8 and 1.6.

11. The method of claim 7, further comprising adding a dye to the liquid.

12. The method of claim 1, further comprising acid-etching the exterior surface of the glass lampshell to form a light-scattering surface.

13. The method of claim 12, wherein the acid solvents used for acid-etching the glass lampshell includes hydrofluoric acid solvent.

14. The method of claim 1, further comprising sandblasting the exterior surface of the glass lampshell to form a light-scattering surface.

15. The method of claim 1, further comprising filing a portion of the cavity with a light-scattering glue.

16. The method of claim 15, further comprising immersing the LED emitter in the light-scattering glue.

17. The method of claim 1, wherein the LED emitter contains at least one LED chip.

18. The method of claim 1, while heating the glass lampshell, further comprising installing a heat isolation device to insolate the LED emitter from the heating.

19. The method of claim 1, while heating the glass lampshell, further comprising applying a cooling measure to the bottom of the glass lampshell.

20. The method of claim 19, wherein the cooling measure includes blasting air.

21. The method of claim 1, while heating the glass lampshell, further comprising filling the cavity with air via the exhaust pipe.