# US 10,770,053 B2 · Noise reducing lighting devices

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- Number: US 10,770,053 B2
- Document ID: US10770053B2
- Status: Granted
- Kind: B2
- Application number: 15/933,523
- Filed: 2018-03-23
- Published: 2019-09-26
- Granted: 2020-09-08
- Earliest claimed: 2018-03-23
- Assignees: ABL IP Holding LLC
- Applicants: Abl IP Holding LLC
- Inventors: Robert M. Krass; Gregory Malone; Peter Yi Yan Ngai; David P. Ramer; Rashmi Kumar Rogers
- Web page: https://patentgrep.com/patent/US10770053B2

## CPC

- G10K 11/162: Selection of materials
- G02B 6/0051: {Diffusing sheet or layer}
- G02B 6/0081: {Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging}
- G10K 11/172: using resonance effects
- G10K: SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

Lighting devices are disclosed. One lighting device includes a housing, a light source, and a panel. The light source is mounted within the housing and configured to emit light sufficient for general illumination of an area. The panel is supported by the housing at a location to receive light from the light source at one or more light input surfaces of the panel and output the received light from the light source via a light output surface of the panel facing the area. The light propagates within material of the panel from the one or more light input surfaces to the light output surface. The light output surface of the panel comprises a noise reduction structure.

## Claims

### Claim 1

A lighting device, comprising:
a housing;
a light source mounted within the housing and configured to emit light sufficient for general illumination of an area; and
a panel supported by the housing at a location to receive light from the light source at one or more light input surfaces of the panel and output the received light via a light output surface of the panel facing the area, the light propagating within material of the panel from the one or more light input surfaces to the light output surface,
wherein the light output surface of the panel comprises an acoustic noise reduction structure.

### Claim 2 (depends on 1)

The lighting device of claim 1, wherein the panel comprises a light guide having a major surface bounded by lateral edges, the major surface defining the light output surface, at least one of the lateral edges defining the one or more light input surfaces.

### Claim 3 (depends on 1)

The lighting device of claim 1, further comprising a light guide having a major surface bounded by lateral edges, wherein the panel comprises a diffuser coupled to the major surface of the light guide, a surface of the diffuser defining the light output surface of the panel.

### Claim 4 (depends on 1)

The lighting device of claim 1, further comprising a display mounted within the housing at a location to supply image light to another one of the one or more light input surfaces of the panel, the other one of the one or more light input surfaces being substantially opposite the light output surface of the panel.

### Claim 5 (depends on 1)

The lighting device of claim 1, wherein the housing comprises a bezel surrounding the panel, and the bezel comprises a further noise reduction structure.

### Claim 6 (depends on 5)

The lighting device of claim 5, wherein the further noise reduction structure comprises a convex curved surface of the bezel.

### Claim 7 (depends on 1)

The lighting device of claim 1, wherein the noise reduction structure comprises a plurality of openings formed in the light output surface.

### Claim 8 (depends on 7)

The lighting device of claim 7, wherein the plurality of openings comprises a plurality of parallel slots.

### Claim 9 (depends on 7)

The lighting device of claim 7, wherein the plurality of openings comprises a plurality of parallel channels arranged to form a Schroeder diffuser.

### Claim 10 (depends on 7)

The lighting device of claim 7, wherein the plurality of openings comprises a plurality of holes, the plurality of holes in communication with a cavity defined in the housing on a side of the panel opposite the area.

### Claim 11 (depends on 1)

The lighting device of claim 1, wherein the noise reduction structure comprises an acoustic diffuser.