# US 2024/0200765 A1 · A vapor chamber

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- Number: US 2024/0200765 A1
- Document ID: US20240200765A1
- Status: Published application
- Kind: A1
- Application number: 18/556,423
- Filed: 2022-04-15
- Published: 2024-06-20
- Earliest claimed: 2021-04-23
- Assignees: Signify Holding B.V.
- Applicants: Signify Holding B.V.
- Inventors: TIES VAN BOMMEL; JIANG HONG YU; GENEVIEVE THERESE MARTIN; DERK TIEKINK
- Web page: https://patentgrep.com/patent/US20240200765A1

## CPC

- F21V 29/51: using condensation or evaporation of a fluid, e.g. heat pipes
- H05B 3/0038: {for industrial applications}
- F21K 9/238: Arrangement or mounting of circuit elements integrated in the light source
- F28D 15/0233: {the conduits having a particular shape, e.g. non-circular cross-section, annular (F28D15/0241, F28D15/0266 take precedence)}
- F28D 15/0283: {Means for filling or sealing heat pipes}
- F28D 15/04: with tubes having a capillary structure
- F21Y 2113/00: Combination of light sources
- F21Y 2115/10: Light-emitting diodes [LED]
- F28F 2275/06: by welding
- H10H 20/8586: {comprising fluids, e.g. heat-pipes}
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- 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
- F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general)
- 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
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS

## Abstract

This invention relates to a vapor chamber (100) comprising a first thermally conductive plate (110) and a second thermally conductive plate (120) separated from each other by a plurality of bridging elements (140) to form a cavity (130) having a first height, H1 (001). The vapor chamber (100) comprises a bending section (151) and a non-bending section (152). The bending section (151) is configured to provide a bend having a first volume fraction (V1) of bridging elements (140), and the non-bending section (152) having a second volume fraction (V2) of bridging elements (140). A ratio of the first volume fraction (V1) and the second volume fraction (V2) is less than 0.7.

## Claims

### Claim 1

A vapor chamber comprising:
a first thermally conductive plate and a second thermally conductive plate separated from each other by a plurality of bridging elements to form a chamber having a first height, H1,
wherein the vapor chamber having a length L along a longitudinal axis and a width W defined perpendicular to the longitudinal axis and comprises a bending section configured to provide a bend around an axis in a direction parallel with the width W, said vapor chamber further having a first volume fraction of bridging elements, and a non-bending section having a second volume fraction of bridging elements, and
wherein a ratio of the first volume fraction and the second volume fraction is less than 0.7.

### Claim 2 (depends on 1)

The vapor chamber according to claim 1, wherein the ratio of the first volume fraction and the second volume fraction is selected from a range between 0 and 0.3.

### Claim 3 (depends on 1)

The vapor chamber according to claim 1, wherein a ratio of the length, L and the width, W is selected from a range between 0.2 and 5.

### Claim 4 (depends on 1)

The vapor chamber according to claim 1, wherein the width, W varies along the longitudinal axis from a first width value to a second width value, and wherein the second width value is selected from a range between 0.1 times of the first width value to 5 times of the first width value.

### Claim 5 (depends on 4)

The vapor chamber according to claim 4, wherein the width, W varies along the longitudinal axis from a first width value to a second width value and a relation between the width, W along the longitudinal axis is defined by a linear function or a step function.

### Claim 6 (depends on 1)

The vapor chamber according to claim 1, wherein the vapor chamber comprises an ‘n’ number of the bending sections, and an ‘(n−1)’, n or ‘(n+1)’ number of the non-bending sections, wherein ‘n’ is selected from a range between 2 to 20, and wherein the non-bending sections and the bending sections are arranged alternately.

### Claim 7 (depends on 1)

The vapor chamber according to claim 1, wherein the vapor chamber has a thickness, de, wherein the bending section is configured to provide a bend having a bending angle, θ, a bending radius, rb, and a bending length, Lb along the longitudinal axis, and wherein the bending length, Lb is greater than or equal to π*(rb+de)/(360/θ).

### Claim 8 (depends on 7)

The vapor chamber according to claim 7, wherein the bending radius, rb that is less than or equal to 3 mm.

### Claim 9 (depends on 1)

The vapor chamber according to claim 1, wherein the bending angle, θ is selected from a range between 45 degrees and 135 degrees.

### Claim 10 (depends on 1)

The vapor chamber according to claim 1, wherein the chamber comprises a wick structure, wherein the wick structure comprises a first wick structure attached to an inner surface of the first thermally conductive plate facing the chamber and a second wick structure attached to an inner surface of the second thermally conductive plate facing the chamber.

### Claim 11 (depends on 1)

The vapor chamber according to claim 1, wherein the plurality of bridging elements comprise columns.

### Claim 12 (depends on 1)

A method for providing a bent vapor chamber, the method comprising:
providing a vapor chamber along the longitudinal axis according to claim 1;
filling the bent vapor chamber with a coolant; and
sealing the bent vapor chamber.

### Claim 13 (depends on 12)

The method according to claim 12, wherein the method comprises bending along the bending section is to provide the bent vapor chamber having meandering shapes.

### Claim 14 (depends on 12)

A device comprising the bent vapor chamber obtained with the method according to claim 12, wherein the device further comprises an electronic component thermally coupled to the bent vapor chamber.

### Claim 15 (depends on 14)

The device according to claim 14, wherein the electronic component comprises one or more light-emitting devices.