# US 2013/0240184 A1 · Heat dissipation structure of a lighting engine, a manufacturing method thereof and a lighting system comprising the structure

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2013/0240184 A1
- Document ID: US20130240184A1
- Status: Published application
- Kind: A1
- Application number: 13/989,825
- Filed: 2011-11-08
- Published: 2013-09-19
- Earliest claimed: 2010-11-29
- Assignees: OSRAM GmbH
- Inventors: Chenglong Dai; Nimchung Ku; Canbang Yang; Haiping Yuan
- Web page: https://patentgrep.com/patent/US20130240184A1

## CPC

- F21V 29/74: with fins or blades
- B21D 53/02: heat exchangers {or parts thereof}, e.g. radiators, condensers {fins, headers}(making finned or ribbed tubes by fixing strip material or the like to tubes B21C37/22)
- F21K 9/00: Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21V 29/713: {in direct thermal and mechanical contact of each other to form a single system}
- F28F 19/02: by using coatings, e.g. vitreous or enamel coatings
- F28F 21/089: {Coatings, claddings or bonding layers made from metals or metal alloys (F28F19/06 takes precedence)}
- F21Y 2115/10: Light-emitting diodes [LED]
- Y10T 29/4935: Heat exchanger or boiler making
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- B21D: WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire B21F)
- 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
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)
- 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
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A heat dissipation structure for a lighting engine, may include: a primary heat sink, and an extended heat sink, wherein the primary heat sink has a first contact surface, and the extended heat sink has a second contact surface provided opposite to the first contact surface, the first contact surface and the second contact surface directly contacted each other with no additional layer therebetween.

## Claims

### Claim 1

A heat dissipation structure for a lighting engine, comprising: a primary heat sink, and an extended heat sink, wherein the primary heat sink has a first contact surface, and the extended heat sink has a second contact surface provided opposite to the first contact surface, the first contact surface and the second contact surface directly contacted each other with no additional layer therebetween.

### Claim 2 (depends on 1)

The heat dissipation structure according to claim 1, wherein the first contact surface and the second contact surface are smooth with a predefined smoothness.

### Claim 3 (depends on 1)

The heat dissipation structure according to claim 1, wherein the first contact surface and the second contact surface are flat with a predefined flatness.

### Claim 4 (depends on 2)

The heat dissipation structure according to claim 2, wherein the predefined smoothness is determined by a desired thermal resistance therebetween and manufacturing conditions.

### Claim 5 (depends on 4)

The heat dissipation structure according to claim 4, wherein roughness of the first contact surface and the second contact surface is <=0.8 μm.

### Claim 6 (depends on 16)

The heat dissipation structure according to claim 16, wherein the flatness of the flat surfaces is <=0.05 mm.

### Claim 7 (depends on 1)

The heat dissipation structure according to claim 1, wherein the first contact surface and the second contact surface are sprayed with an anti-oxidation material.

### Claim 8 (depends on 1)

The heat dissipation structure according to claim 1, wherein the first contact surface and the second contact surface are connected together by a mechanical fastening structure.

### Claim 9 (depends on 8)

The heat dissipation structure according to claim 8, wherein the fastening structure includes fastening holes provided on the first contact surface and the second contact surface and fastening members passing through the fastening holes.

### Claim 10

A lighting system comprising a heat dissipation structure for a lighting engine, the heat dissipation structure comprising: a primary heat sink, and an extended heat sink, wherein the primary heat sink has a first contact surface, and the extended heat sink has a second contact surface provided opposite to the first contact surface, the first contact surface and the second contact surface directly contacted each other with no additional layer therebetween.

### Claim 11

A manufacturing method of a heat dissipation structure of a lighting engine, the method comprising: a) providing a primary heat sink having a first contact surface and an extended heat sink having a second contact surface; and b) machining the first contact surface and the second contact surface and then the first contact surface and the second contact surface directly contact each other with no additional layer therebetween.

### Claim 12 (depends on 11)

The method according to claim 11, the method further comprising, c) after a): coating an anti-oxidation layer on the first contact surface and the second contact surface.

### Claim 13 (depends on 11)

The method according to claim 11, the method further comprising d) after b): fixing the primary heat sink and the extended heat sink together using the fastening members and the fastening holes provided on the first contact surface and the second contact surface.

### Claim 14 (depends on 11)

The method according to claim 11, wherein in b), the first contact surface and the second contact surface are machined into smooth surfaces and flat surfaces with a predefined smoothness and a predefined flatness.

### Claim 15 (depends on 14)

The method according to claim 14, wherein in b), the predefined smoothness and the predefined flatness are determined by a desired thermal resistance therebetween and manufacturing conditions.

### Claim 16 (depends on 3)

The heat dissipation structure according to claim 3, wherein the predefined flatness is determined by a desired thermal resistance therebetween and manufacturing conditions.

### Claim 17 (depends on 12)

The method according to claim 12, the method further comprising, d) after c): fixing the primary heat sink and the extended heat sink together using the fastening members and the fastening holes provided on the first contact surface and the second contact surface.