# US 11,898,733 B2 · Solid state lights with cooling structures

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- Number: US 11,898,733 B2
- Document ID: US11898733B2
- Status: Granted
- Kind: B2
- Application number: 18/194,907
- Filed: 2023-04-03
- Published: 2023-08-10
- Granted: 2024-02-13
- Earliest claimed: 2010-08-12
- Assignees: Micron Technology, Inc.
- Applicants: Micron Technology, Inc.
- Inventors: Scott E. Sills
- Web page: https://patentgrep.com/patent/US11898733B2

## CPC

- F21V 29/67: characterised by the arrangement of fans
- F21V 7/0008: {providing for indirect lighting}
- F21V 9/30: Elements containing photoluminescent material distinct from or spaced from the light source (shades F21V1/17; globes, bowls or cover glasses F21V3/08, F21V3/12; refractors F21V5/10; reflectors F21V7/26, F21V7/30; elements with provision for controlling the spectral properties or intensity F21V9/40)
- F21V 13/14: the elements being filters or photoluminescent elements, reflectors and refractors
- F21V 29/673: {the fans being used for intake}
- F21V 29/83: the elements having apertures, ducts or channels, e.g. heat radiation holes
- F21V 7/005: {with an elongated shape to cooperate with linear light sources}
- F21V 7/05: plane
- F21V 13/04: the elements being reflectors and refractors {(for vehicle rear lights F21S43/40)}
- F21V 29/507: of means for protecting lighting devices from damage, e.g. housings
- F21V 29/74: with fins or blades
- F21V 29/80: with pins or wires
- F21Y 2115/10: Light-emitting diodes [LED]
- H10H 20/85: Packages
- H10H 20/856: Reflecting means
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- 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
- H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS

## Abstract

A solid state lighting (SSL) with a solid state emitter (SSE) having thermally conductive projections extending into an air channel, and methods of making and using such SSLs. The thermally conductive projections can be fins, posts, or other structures configured to transfer heat into a fluid medium, such as air. The projections can be electrical contacts between the SSE and a power source. The air channel can be oriented generally vertically such that air in the channel warmed by the SSE flows upward through the channel.

## Claims

### Claim 1

A solid state lighting (SSL) device, comprising:
a reflector having a face angled relative to a primary direction of the SSL device by a non-zero first angle Φ, wherein the face has an edge further in the primary direction than other edges of the face; and
a solid state emitter (SSE) angled relative to the primary direction by a non-zero second angle θ,
wherein the first angle Φ and the second angle θ are configured so that light emitted from the SSE is reflected by the face in the primary direction of the SSL device, and
wherein light emitted from a first peripheral region of the SSE is directed towards the edge of the reflector.

### Claim 2 (depends on 1)

The SSL device of claim 1, wherein light emitted from a second peripheral region of the SSE opposite the first peripheral region is reflected by the face of the reflector towards a first edge of the SSE.

### Claim 3 (depends on 1)

The SSL device of claim 1, wherein the SSE and reflector are comprised in a housing, and wherein the housing includes a channel configured to permit a flow of air across the SSE.

### Claim 4 (depends on 3)

The SSL device of claim 3, wherein the channel is configured to permit the flow of air across at least one of an active portion or a back portion of the SSE.

### Claim 5 (depends on 3)

The SSL device of claim 3, wherein a back portion of the SSE includes a plurality of thermally conductive projections extending into the channel.

### Claim 6 (depends on 3)

The SSL device of claim 3, wherein the channel is open to ambient air at one of a front or a back of the housing.

### Claim 7 (depends on 3)

The SSL device of claim 3, further comprising an air pressurizer positioned relative to the channel to drive air through the channel.

### Claim 8

A solid state lighting (SSL) device, comprising:
a reflector having a first face and a second face, each of the first and second faces angled relative to a primary direction of the SSL device by a non-zero first angle Φ, each of the first and second faces having an edge further in the primary direction than other edges of the corresponding face; and
first and second solid state emitters (SSEs), each angled relative to the primary direction by a non-zero second angle θ, wherein the first angle Φ and the second angle θ are configured so that light emitted from the first and second SSEs is reflected by the first and second faces, respectively, in the primary direction of the SSL device
wherein light emitted from a first peripheral region of the first SSE is directed towards a first edge of the corresponding first face, and
wherein light emitted from a first peripheral region of the second SSE is directed towards a second edge of the corresponding second face.

### Claim 9 (depends on 8)

The SSL device of claim 8, wherein:
light emitted from a second peripheral region of the first SSE opposite the first peripheral region thereof is reflected by the first face towards the first peripheral region of the first SSE, and
light emitted from a second peripheral region of the second SSE opposite the first peripheral region thereof is reflected by the second face towards the first peripheral region of the second SSE.

### Claim 10 (depends on 8)

The SSL device of claim 8, wherein the first SSE, the second SSE, and the reflector are comprised in a housing, and wherein the housing includes a channel configured to permit a flow of air across the first and second SSEs.

### Claim 11 (depends on 10)

The SSL device of claim 10, wherein the channel is configured to permit the flow of air across at least one of an active portion or a back portion of the first and second SSEs.

### Claim 12 (depends on 10)

The SSL device of claim 10, wherein a back portion of each of the first and second SSEs includes a plurality of thermally conductive projections extending into the channel.

### Claim 13 (depends on 10)

The SSL device of claim 10, wherein the channel is open to ambient air at one of a front or a back of the housing.

### Claim 14 (depends on 10)

The SSL device of claim 10, further comprising an air pressurizer positioned relative to the channel to drive air through the channel.

### Claim 15 (depends on 8)

The SSL device of claim 8, wherein the edge of the first face of the reflector and the edge of the second face of the reflector meet at a line.

### Claim 16 (depends on 8)

The SSL device of claim 8, wherein the edge of the first face of the reflector and the edge of the second face of the reflector lie in a plane and are not parallel.