LED lamp instantly dissipating heat as effected by multiple-layer substrates

• US 7,607,802 B2
• Filed: 07/23/2007
• Issued: 10/27/2009
• Est. Priority Date: 07/23/2007
• Status: Expired due to Fees

• Current Assignee: Tamkang University
• Original Assignee: Tamkang University
• Inventors: Kang, Shung-Wen, Chien, Kun-Cheng
• Primary Examiner(s): O'Shea; Sandra
• Assistant Examiner(s): Dzierzynski; Evan
• Application Number:
  US11/880,372
• Publication Number:
  US 20090027889A1
• Time in Patent Office: 827 Days
• Field of Search: 362/294, 362/373, 362/218, 362/580
• US Class Current: 362/294
• CPC Class Codes: F21K 9/23 Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
• CPC Class Codes: F21S 8/086 with lighting device attached sideways of the standard, e.g. for roads and highways
• CPC Class Codes: F21V 29/507 of means for protecting lighting devices from damage, e.g. housings
• CPC Class Codes: F21V 29/51 using condensation or evaporation of a fluid, e.g. heat pipes
• CPC Class Codes: F21V 29/71 using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• CPC Class Codes: F21V 29/763 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21V 29/767 the planes containing the fins or blades having directions perpendicular to the light emitting axis
• 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: F21W 2111/02 for roads, paths or the like
• CPC Class Codes: F21Y 2107/60 on stacked substrates
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

A LED lamp includes: a plurality of substrates juxtapositionally formed as multiple layers, each substrate having a plurality of light emitting diodes (LEDs) mounted thereon, whereby upon generation of heat by the LEDs when lit up, each substrate will form as a heat-dissipating plate in-situ in order that the multiple-layer substrates will instantly effectively dissipate the heat produced from the LEDs of the lamp outwardly for preventing deterioration of the illumination quality of the LED lamp.

Claims

1. A LED lamp comprising:

a plurality of LED modules including LED array and multi-chip LED array respectively thermally connected to a plurality of substrates which are juxtapositionally formed as multiple layers, each said substrate thermally connected with at least a heat dissipating device, a transparent cover mounted on a front portion of the LED lamp, and at least a lamp shade secured to a rear portion of the LED lamp and connected with an inner portion of the heat dissipating device;

with said plurality of said substrates encased in between the transparent cover and the lamp shade; and

said heat dissipating device including;

a plurality of heat-transfer blocks each said block connected with at least one said substrate and each said block having an outer surface portion connected with one said LED module;

a plurality of horizontal heat pipes having at least one said horizontal heat pipe horizontally connected with each said heat-transfer block;

a plurality of vertical heat-dissipating fins perpendicularly connected with the horizontal heat pipes;

a plurality of vertical heat pipes each vertically connected to each said heat-transfer block; and

a plurality of horizontal heat-dissipating plates perpendicularly connected with the vertical heat pipes.

2. A LED lamp according to claim 1, wherein said lamp shade is made of heat conductive materials and includes a plurality of ventilation holes formed through the lamp shade for venting hot air outwardly;

with the inner end portions of the vertical heat pipes connected with the lamp shade for dissipating heat outwardly.

3. A LED lamp according to claim 1, wherein said lamp shade is further connected with a water-proof shade juxtapositioned to the lamp shade to prevent water to enter the interior of the LED lamp;

and the water-proof shade connected with partial said vertical heat pipes for further conducting and dissipating heat outwardly as thermally transferred from the vertical heat pipes.

4. A LED lamp according to claim 1 wherein said horizontal heat-dissipating plates are each slightly inclined sidewardly outwardly towards a plurality of ventilation holes formed in the lamp shade to smoothly guide the hot air upwardly outwardly;

and a plurality of ventilation openings formed through the heat-dissipating plates for helping heat convection of hot air through the openings for enhancing the heat dissipation.