Light-emitting diode light

• US 20070230188A1
• Filed: 03/30/2007
• Published: 10/04/2007
• Est. Priority Date: 03/30/2006
• Status: Abandoned Application

• Current Assignee: Yi Min Lin
• Original Assignee: Yi Min Lin
• Inventors: Lin, Yi Min
• Application Number:
  US11/730,214
• Publication Number:
  US 20070230188A1
• Time in Patent Office: Days
• US Class Current: 362/294
• CPC Class Codes: F21K 9/233 specially adapted for generating a spot light distribution, e.g. for substitution of reflector lamps
• CPC Class Codes: F21V 29/507 of means for protecting lighting devices from damage, e.g. housings
• 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 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

Abstract

A light-emitting diode (LED) light includes a ceramic shade, an illuminative unit and at least one wire. The ceramic shade includes a primary chamber defined therein and at least one through hole in communication with the primary chamber. The illuminative unit is disposed in the primary chamber and includes an LED die and a path. The path transfers heat generated by the LED die to the ceramic shade. The wire is connected to the illuminative unit and inserted through the through hole.

Claims

1. A light-emitting diode (LED) light comprising:

a ceramic shade comprising a primary chamber defined therein and at least one through hole in communication with the primary chamber;

an illuminative unit being disposed in the primary chamber, and comprising at least one LED die and a path for transferring heat generated by the LED die to the ceramic shade; and

at least one wire connected to the illuminative unit and inserted through the through hole.

2. The LED light according to claim 1 wherein the path comprises:

a metal core printed circuit board comprising a metal core layer in contact with a floor of the primary chamber; and

a thermal conductive metal block comprising a side in contact with the LED die and another side in contact with the metal core layer.

3. The LED light according to claim 1 wherein the path comprises:

a metal core printed circuit board comprising a metal core layer in contact with a floor of the primary chamber;

a ceramic sheet being in contact with the metal core layer; and

a thermal conductive metal block comprising a side in contact with the LED die and another side in contact with the ceramic sheet.

4. The LED light according to claim 2 wherein the path further comprises a thermal conductive paste interposed between the floor of the primary chamber and the metal core layer.

5. The LED light according to claim 3 wherein the path further comprises a thermal conductive paste interposed between the floor of the primary chamber and the metal core layer.

6. The LED light according to claim 1 wherein the ceramic shade comprises a secondary chamber for receiving a connector, and wherein the secondary chamber is opposite to the primary chamber, which is in communication with the secondary chamber via the through hole, and the connector comprises two plugs connected with the wire.

7. The LED light according to claim 6 comprising a reflector fitted in the ceramic shade.

8. The LED light according to claim 7 wherein the ceramic shade comprises a plurality of vents in communication with an interior and an exterior of the ceramic shade.

9. The LED light according to claim 2 comprising a connector connected to the ceramic shade and opposite to the primary chamber, wherein the connector comprises two plugs connected to the wire.

10. The LED light according to claim 9 wherein the ceramic shade comprises a plurality of vents circularly arranged in the primary chamber for venting the heat of the ceramic shade.

11. The LED light according to claim 2 comprising a connector with an electrically conductive tube and electrically conductive contact point connected to the wire respectively, wherein the connector is connected to the ceramic shade and opposite to the primary chamber, and the electrically conductive tube is formed with a thread portion.

12. The LED light according to claim 2 wherein a porosity of the ceramic shade is 20% to 30%, the Mohs'"'"' hardness of the ceramic shade is 4 to 7, a bulk density of the ceramic shade is 1 to 3 g/cm³, and a thermal conductivity of the ceramic shade is 4 to 8 w/m-k.

13. A ceramic shade comprising a primary chamber defined therein and at least one through hole in communication with the primary chamber, and a porosity of the ceramic shade being 20% to 30%, the Mohs'"'"' hardness of the ceramic shade being 4 to 7, a bulk density of the ceramic shade being 1 to 3 g/cm³, and a thermal conductivity of the ceramic shade being 4 to 8 w/m-k.

14. The ceramic shade according to claim 13 comprising a secondary chamber opposite to the primary chamber, which is in communication with the secondary chamber via the through hole.

15. The ceramic shade according to claim 14 comprising a plurality of vents in communication with an interior and an exterior of the ceramic shade.

16. The ceramic shade according to claim 13 comprising a plurality of vents circularly arranged in the primary chamber.

17. A method for making a ceramic shade comprising the steps of:

providing fluid ceramic paste by mixing ceramic powder with paraffin;

making a semi-product of the ceramic shade by injecting the ceramic paste into a cavity of a mold so that the semi-product is made in compliance with the cavity of the mold; and

making a final product of the ceramic shade by sintering the semi-product.

18. The method according to claim 18 wherein the ceramic paste comprises 60% to 90% of SiC, 5% to 15% of Al₂O₃, 2% to 6% of SiO₂, and 3% to 9% of the paraffin.