LED lamp and production method of the same

• US 8,405,310 B2
• Filed: 04/27/2012
• Issued: 03/26/2013
• 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:
  US13/458,268
• Publication Number:
  US 20120212137A1
• Time in Patent Office: 333 Days
• Field of Search: None
• US Class Current: 313/512
• 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. An LED lamp comprising:

a glass lampshell;

a glass trumpet tube with a first end sealed within the glass lampshell to form a cavity within the glass lampshell;

an LED emitter within the cavity;

a supporting component within the cavity supporting and electrically insulated from the LED emitter and connected to the glass trumpet tube;

a wire encompassed within the glass trumpet tube having a first end extending outside of the cavity and a second end electrically connected to the LED emitter; and

a temperature control component connected in series to the LED emitter via the wire.

2. The LED lamp of claim 1, wherein the cavity contains a liquid.

3. The LED lamp of claim 2, wherein the liquid is light-pervious.

4. The LED lamp of claim 2, wherein the liquid is selected from liquids with a light refraction index of between 1.3 and 1.6.

5. The LED lamp of claim 2, wherein the liquid is selected from liquids with a specific gravity of between 0.8 and 1.6.

6. The LED lamp of claim 2, wherein the liquid contains a dye.

7. The LED lamp of claim 2, wherein the temperature control component and the LED emitter are immersed in the liquid.

8. The LED Lamp of claim 1, where the stem assembly further comprises an exhaust pipe encompassed within the glass trumpet tube having a first end extending outside of the cavity and a second end within the cavity such that air in the cavity may be evacuated via the exhaust pipe.

9. The LED lamp of claim 1, 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.

10. The LED lamp of claim 1, wherein the temperature control component has a default temperature between 60°

C. and 140°

C.

11. The LED lamp of claim 1, wherein the glass lampshell has an acid-etching exterior surface.

12. The LED lamp of claim 1, wherein the glass lampshell has a sandblasting exterior surface.

13. The LED lamp of claim 1, wherein the glass lampshell has an exterior surface with light-scattering coating.

14. The LED lamp of claim 1, wherein the LED emitter contains at least one LED chip.

15. The LED lamp of claim 1, wherein the supporting component is thermal conductive.

16. The LED lamp of claim 1, further comprising a light-scattering material and a liquid separated from the light-scattering material.

17. The LED lamp of claim 16, wherein the LED emitter is immersed in the light-scattering material and the temperature control component is immersed in the liquid.

18. The LED lamp of claim 1, wherein the cavity contains a medium vacuum.

19. The LED lamp of claim 1, wherein the cavity contains a high vacuum.

20. The LED lamp of claim 16, wherein the wire has a first portion immersed in the light-scattering glue and a second portion immersed in the liquid, a length of the second portion is greater then a length of the first portion.