Light emitting diode illumination apparatus

• US 7,226,189 B2
• Filed: 04/15/2005
• Issued: 06/05/2007
• Est. Priority Date: 04/15/2005
• Status: Active Grant

• Current Assignee: Taiwan Oasis Technology Co., Ltd.
• Original Assignee: Taiwan Oasis Technology Co., Ltd.
• Inventors: Lee, Ming-Shun, Sung, Ping-Ru
• Primary Examiner(s): O'Shea; Sandra
• Assistant Examiner(s): Truong; Bao Q.
• Application Number:
  US11/106,550
• Publication Number:
  US 20060232974A1
• Time in Patent Office: 781 Days
• Field of Search: 362/294, 362/800, 362/650, 362/218, 362/126, 362/547, 362/580, 362/264, 362/345, 362/373, 362/240, 362/230, 362/231, 362/612, 362/555, 362/545, 361/688, 361/676, 361/690, 361/697, 361/704, 361/714, 361/687
• US Class Current: 362/294
• 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 9/238 Arrangement or mounting of circuit elements integrated in the light source
• CPC Class Codes: F21V 19/003 Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
• CPC Class Codes: F21V 19/0035 the fastening means being capable of simultaneously attaching of an other part, e.g. a housing portion or an optical component
• CPC Class Codes: F21V 23/006 the substrate being distinct from the light source holder
• CPC Class Codes: F21V 29/78 with helically or spirally arranged fins or blades
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21V 29/89 Metals
• 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 2103/33 annular
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

The present invention describes a light emitting diode illumination apparatus made of a light bulb base, a heat dissipating device, a plastic lid, a drive substrate, a metal substrate, a circular insulated base and a casing, and the heat dissipating device is in contact with the metal substrate in normal conditions, such that the heat source produced by each light emitting diode is conducted to the heat dissipating device through the metal substrate and then conducted from the heat dissipating device to the light bulb base for effectively dispersing the heat source and maintaining the light emitting efficiency of each light emitting diode.

Claims

1. A light emitting diode illumination apparatus, comprising:

a light bulb base, having a groove base for installing different components and a connector disposed at the bottom for electrically coupling with an external circuit;

a heat dissipating device, having an end coupled into said groove base of said light bulb base and the other end contacted with a metal substrate under normal conditions;

a plastic lid, fixed into said groove base and having a circular groove for accommodating said heat dissipating device and a drive substrate;

the metal substrate, installed in the circular groove base and having a plurality of light emitting diodes, and said each light emitting diode being controlled by said drive substrate, and said drive substrate being coupled with the connector; and

a circular insulating base, disposed above said circular groove and having a circular edge for pressing the drive substrate and the metal substrate below for fixing said substrates into position, and said circular insulating base having a casing disposed on said circular insulating base;

such that said heat dissipating device is in contact with said substrates under normal conditions, and a heat source produced by said light emitting diodes is conducted from said metal substrate to said heat dissipating device and dispersed effectively from said heat dissipating device for maintaining a light emitting efficiency of said each light emitting diode.

2. The light emitting diode illumination apparatus of claim 1, wherein said heat dissipating device is a ceramic cylinder having a plurality of heat dissipating holes.

3. The light emitting diode illumination apparatus of claim 1, wherein said groove base has an internal thread, and said heat dissipating device and said plastic lid separately have an external thread in corresponsive to said internal thread, such that said heat dissipating device and said plastic lid are secured onto said circular base in sequence.

4. The light emitting diode illumination apparatus of claim 1, wherein said heat dissipating device has a fixing pillar and the metal substrate has a fixing groove at a surface where said heat dissipating device and said metal substrate are in contact.

5. The light emitting diode illumination apparatus of claim 1, wherein said heat dissipating device and said metal substrate are coated with heat conductive grease at a surface where said heat dissipating device and said metal substrate are in contact.

6. The light emitting diode illumination apparatus of claim 1, wherein said metal substrate could be an aluminum based copper clad laminate.

7. The light emitting diode illumination apparatus of claim 1, wherein said circular groove and said circular insulating base have an internal thread and an external thread for mutually engaged with each other.

8. The light emitting diode illumination apparatus of claim 1, wherein said circular groove forms a retaining base at an appropriate position of the bottom for fixing said drive substrate into position.