Phosphor-containing LED light bulb

• US 8,796,922 B2
• Filed: 12/18/2013
• Issued: 08/05/2014
• Est. Priority Date: 09/14/2007
• Status: Expired due to Fees

• Current Assignee: Switch Bulb Company, Inc.
• Original Assignee: Switch Bulb Company, Inc.
• Inventors: Lenk, Ronald J., Carsten, Bruce
• Primary Examiner(s): Williams, Joseph L
• Application Number:
  US14/133,459
• Publication Number:
  US 20140175973A1
• Time in Patent Office: 230 Days
• Field of Search: 313/512, 313/46
• 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 9/64 using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
• CPC Class Codes: F21V 29/56 using liquid coolants F21V29/51 takes precedence
• 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]
• CPC Class Codes: H01L 33/507 the elements being in intimate contact with parts other than the semiconductor body or integrated with parts other than the semiconductor body
• CPC Class Codes: H05B 33/145 Arrangements of the electroluminescent material

Abstract

An LED bulb, which includes a shell, a filler material within the shell of the bulb, at least one type of phosphor dispersed inside the filler material and at least one LED within the shell.

Claims

1. An LED bulb comprising:

a first shell having a volume defined within the first shell;

a liquid at least partially filling the volume defined within the first shell;

a first type of phosphor dispersed in the liquid; and

an LED disposed within the volume defined within the first shell, the LED comprising;

an LED die, and

a second shell enclosing the LED die, wherein the second shell;

keeps the liquid away from the LED die, and

contains a second type of phosphor.

2. An LED bulb as set forth in claim 1, wherein the first type of phosphor is uniformly distributed throughout the liquid.

3. An LED bulb as set forth in claim 1, wherein the first type of phosphor is non-uniformly distributed in the liquid.

4. An LED bulb as set forth in claim 1, wherein the first type of phosphor and the second type of phosphor are different.

5. An LED bulb as set forth in claim 1, wherein the first shell contains phosphor.

6. An LED bulb as set forth in claim 1, wherein the LED die is a blue or ultraviolet LED die.

7. An LED incandescent bulb replacement comprising:

an incandescent bulb-shaped first shell;

a liquid at least partially filling the volume defined within the first shell;

a first type of phosphor dispersed in the liquid; and

an LED disposed within the volume defined within the first shell, the LED comprising;

an LED die, and

a second shell enclosing the LED die, wherein the second shell;

keeps the liquid away from the LED die, and

contains a second type of phosphor.

8. An LED bulb as set forth in claim 7, wherein the first type of phosphor is uniformly distributed throughout the liquid.

9. An LED bulb as set forth in claim 7, wherein the first type of phosphor is non-uniformly distributed in the liquid.

10. An LED bulb as set forth in claim 7, wherein the first shell contains phosphor.

11. An LED bulb as set forth in claim 7, wherein the LED die is a blue or ultraviolet LED die.

12. An LED bulb as set forth in claim 7, wherein the first type of phosphor and the second type of phosphor are different.