# US 12,215,852 B2 · Illuminated traffic sign assembly with panel having embedded particles

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- Number: US 12,215,852 B2
- Document ID: US12215852B2
- Status: Granted
- Kind: B2
- Application number: 18/375,896
- Filed: 2023-10-02
- Published: 2024-05-30
- Granted: 2025-02-04
- Earliest claimed: 2020-02-24
- Assignees: Nightstar Traffic Solutions, Inc.
- Applicants: NightStar Traffic Solutions, Inc.
- Inventors: Mariteresa Boren Glass
- Web page: https://patentgrep.com/patent/US12215852B2

## CPC

- F21V 5/00: Refractors for light sources (characterised by cooling arrangements F21V29/504)
- F21V 15/012: {Housings with variable shape or dimensions, e.g. by means of elastically deformable materials or by movement of parts forming telescopic extensions of the housing body}
- F21V 31/005: {Sealing arrangements therefor}
- G02B 5/0242: {by means of dispersed particles}
- F21W 2111/02: for roads, paths or the like
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- F21W: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS

## Abstract

A traffic sign assembly includes a plurality of panels. At least one interior panel includes at least one light array configured to project light towards a middle portion of the interior panel and a plurality of particles within the interior panel body. Other panels may include filter panels, transparent panels, heat or moisture shielding panels, reflecting panels, and heat foil panels. The particles in the interior panel directs light from the light array such that the light shines outwardly from toward the front of the traffic sign assembly.

## Claims

### Claim 1

A traffic sign assembly comprising:
a first panel having a first panel back side and a first panel front side coupled to a housing body, wherein the housing body has an edge with a first face operatively configured to receive the first panel;
a second panel having a second panel back side and a second panel front side coupled to the first panel back side;
a third panel having a third panel back side and a third panel front side coupled to the second panel back side;
a fourth panel having a fourth panel back side and a fourth panel front side coupled to the third panel back side, wherein the fourth panel comprises a plurality of particles disposed within a body of the fourth panel;
at least one light array integrated into the body of the fourth panel or coupled to the body of the fourth panel such that light from the light array is directed toward the center of the body of the fourth panel;
a fifth panel having a fifth panel back side and a fifth panel front side coupled to the fourth panel back side;
a sixth panel having a sixth panel back side and a sixth panel front side coupled to the fifth panel back side; and
a seventh panel having a seventh panel back side and a seventh panel front side coupled to the sixth panel back side.

### Claim 2 (depends on 1)

The traffic sign assembly of claim 1, wherein the housing body comprises a first housing body half and a second body half coupled together to form the housing body.

### Claim 3 (depends on 1)

The traffic sign assembly of claim 1, wherein the at least one light array comprises:
a first light array disposed within a gasket and coupled to a first side of the fourth panel; and a second light array disposed within the gasket and coupled to a second side of the fourth panel.

### Claim 4 (depends on 1)

The traffic sign assembly of claim 1, further comprising a thin-film disposed on the front side of the second panel or the front side of the third panel.

### Claim 5 (depends on 1)

The traffic sign assembly of claim 1, wherein the plurality of particles comprises an inorganic opacifier, BaSO4, TiO2, polymeric silicone, and a polybutylacrylate-based material.

### Claim 6 (depends on 5)

The traffic sign assembly of claim 5, wherein the plurality of particles are substantially spherical having a size between 1.0 μm to 20.0 μm.

### Claim 7 (depends on 1)

The traffic sign assembly of claim 1, wherein the first panel is PMMA acrylic.

### Claim 8 (depends on 7)

The traffic sign assembly of claim 7, wherein the second panel is a light beam filter or diffuser.

### Claim 9 (depends on 8)

The traffic sign assembly of claim 8, wherein the third panel is a light beam filter or diffuser.

### Claim 10 (depends on 9)

The traffic sign assembly of claim 9, wherein the fifth panel is a heat or moisture shield.

### Claim 11 (depends on 10)

The traffic sign assembly of claim 10, wherein the sixth panel is a reflector to reflect light toward a front of the traffic sign assembly.

### Claim 12 (depends on 11)

The traffic sign assembly of claim 11, wherein the seventh panel is a thermal heat foil.