# US 7,607,802 B2 · LED lamp instantly dissipating heat as effected by multiple-layer substrates

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- Number: US 7,607,802 B2
- Document ID: US7607802B2
- Status: Granted
- Kind: B2
- Application number: 11/880,372
- Filed: 2007-07-23
- Published: 2009-01-29
- Granted: 2009-10-27
- Earliest claimed: 2007-07-23
- Assignees: Tamkang University
- Inventors: Shung-Wen Kang; Kun-Cheng Chien
- Web page: https://patentgrep.com/patent/US7607802B2

## CPC

- F21V 29/51: using condensation or evaporation of a fluid, e.g. heat pipes
- 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
- F21S 8/086: {with lighting device attached sideways of the standard, e.g. for roads and highways}
- 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
- F21V 29/74: with fins or blades
- F21V 29/763: {the planes containing the fins or blades having the direction of the light emitting axis}
- F21V 29/767: {the planes containing the fins or blades having directions perpendicular to the light emitting axis}
- F21V 29/773: {the planes containing the fins or blades having the direction of the light emitting axis}
- F21V 29/83: the elements having apertures, ducts or channels, e.g. heat radiation holes
- F21V 29/507: of means for protecting lighting devices from damage, e.g. housings
- F21V 29/75: with fins or blades having different shapes, thicknesses or spacing
- F21W 2111/02: for roads, paths or the like
- F21Y 2107/60: on stacked substrates
- F21Y 2115/10: Light-emitting diodes [LED]
- Y10S 362/80: Light emitting diode
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21K: NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21W: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## 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

### Claim 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.

### Claim 2 (depends on 1)

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.

### Claim 3 (depends on 1)

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.

### Claim 4 (depends on 1)

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.