# US 12,595,895 B2 · Multi-region optics for flat illumination

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- Number: US 12,595,895 B2
- Document ID: US12595895B2
- Status: Granted
- Kind: B2
- Application number: 18/606,680
- Filed: 2024-03-15
- Published: 2024-09-19
- Granted: 2026-04-07
- Earliest claimed: 2023-03-17
- Assignees: ABL IP Holding LLC
- Applicants: ABL IP Holding LLC
- Inventors: Gregory P. Frankiewicz; Jonathan Ferry
- Web page: https://patentgrep.com/patent/US12595895B2

## CPC

- F21V 5/045: {the lens having discontinuous faces, e.g. Fresnel lenses}
- F21S 8/026: {intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling}
- F21Y 2115/10: Light-emitting diodes [LED]
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- 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

## Abstract

A multi-region lighting system for flat illumination includes one or more light sources and an optic. The optic comprises a first region characterized by a first refractive-index feature and a second region characterized by a second refractive-index feature. The second region comprises a ridge structure. The first and second refractive-index features and the ridge structure are operative to produce a composite light distribution from the one or more light sources.

## Claims

### Claim 1

A system for a light fixture comprising
one or more light sources; and
an optic, wherein:
the optic comprises:
a first region comprising a first feature, wherein the first feature is a first texture; and
a second region comprising a second feature and a ridge structure in the second region, wherein:
the second feature is a second texture; and
the first texture is rougher than the second texture; and
the first feature, the second feature, and the ridge structure are arranged to produce a composite light distribution from the one or more light sources.

### Claim 2 (depends on 1)

The system of claim 1, wherein:
the optic comprises a first side and a second side opposite the first side;
the first side faces the one or more light sources;
the first texture is on a surface of the second side of the optic;
the second texture is on the surface of the second side of the optic; and
the ridge structure is on the first side of the optic.

### Claim 3 (depends on 1)

The system of claim 1, wherein the second feature is formed by roughness on a surface of the optic.

### Claim 4 (depends on 1)

The system of claim 1, wherein there is no ridge structure in the first region.

### Claim 5 (depends on 1)

The system of claim 1, wherein:
the ridge structure is arranged to focus light, from the one or more light sources, within the second region; and
the first feature is arranged to disperse light from the one or more light sources.

### Claim 6 (depends on 1)

The system of claim 1, wherein:
the ridge structure is a first Fresnel structure; and
the second region is arranged to be replaceable by a second Fresnel structure having a different focal length than the first Fresnel structure.

### Claim 7 (depends on 1)

The system of claim 1, wherein:
the first region has an elliptical shape;
the second region has an elliptical shape;
the second region is inside the first region; and
the first region is concentric with the second region.

### Claim 8 (depends on 1)

The system of claim 1 further comprising a trim having a height equal to or less than 3 inches.

### Claim 9

A method comprising:
generating light from one or more light sources;
transmitting a first portion of light from the one or more light sources through a first region of an optic, wherein the first region is characterized by a first feature; and
transmitting a second portion of light from the one or more light sources through a second region of the optic, wherein:
the second region is characterized by a second feature and a ridge structure in the second region; and
the first feature, the second feature, and the ridge structure are operative to produce a composite light distribution from the one or more light sources;
the first feature is a first texture;
the second feature is a second texture; and
the first texture is rougher than the second texture.

### Claim 10 (depends on 9)

The method of claim 9, wherein:
the optic comprises a first side and a second side opposite the first side;
the first side faces the one or more light sources;
the first texture is on surface of the second side of the optic;
the second texture is on the surface of the second side of the optic; and
the ridge structure is on the first side of the optic.

### Claim 11 (depends on 9)

The method of claim 9, wherein:
the first region has an elliptical shape;
the second region has an elliptical shape;
the second region is inside the first region; and
the first region is concentric with the second region.

### Claim 12 (depends on 9)

The method of claim 9, wherein the ridge structure is a Fresnel lens.

### Claim 13 (depends on 9)

The method of claim 9, further comprising reflecting at least some of the first portion of light from a trim before transmitting through the first region.

### Claim 14 (depends on 9)

The method of claim 9, wherein the second feature is a freeform lens.

### Claim 15 (depends on 9)

The method of claim 9, wherein there is no ridge structure in the first region.

### Claim 16

A system comprising:
one or more light sources; and
an optic, wherein:
the optic comprises:
a first region comprising a first feature, wherein the first feature is a first texture; and
a second region comprising:
a second texture, wherein the second texture is finer than the first texture; and
a second feature arranged to focus light; and
the first feature and the second feature are arranged to produce a composite light distribution from the one or more light sources.

### Claim 17 (depends on 16)

The system of claim 16, further comprising a trim having a height equal to or less than 3 inches tall.

### Claim 18 (depends on 16)

The system of claim 16, wherein the second feature is a Fresnel lens.

### Claim 19 (depends on 16)

The system of claim 16, wherein the second feature is a lens.

### Claim 20 (depends on 16)

The system of claim 16, wherein the second feature is a freeform lens.