# US 2024/0201433 A1 · Light Fixture and Light Fixture Assemblies with Electrically Controlled Lighting Distributions

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- Number: US 2024/0201433 A1
- Document ID: US20240201433A1
- Status: Published application
- Kind: A1
- Application number: 18/595,411
- Filed: 2024-03-04
- Published: 2024-06-20
- Earliest claimed: 2017-07-18
- Assignees: Fusion Optix, Inc.
- Applicants: Fusion Optix, Inc.
- Inventors: Terence Yeo; Michael Demas; Timothy Kelly
- Web page: https://patentgrep.com/patent/US20240201433A1

## CPC

- F21V 21/048: {Mounting arrangements for fastening lighting devices to false ceiling frameworks}
- E04B 9/006: {with means for hanging lighting fixtures or other appliances to the framework of the ceiling}
- E04B 9/067: {with inverted T-shaped cross-section}
- E04B 9/242: {with separate retaining elements}
- E04B 9/247: {by means of sliding or pivoting locking elements, held against the underside of the supporting construction}
- F21S 4/28: rigid, e.g. LED bars
- F21S 8/024: {intended to be recessed in a wall or like vertical structure, e.g. building facade}
- F21S 8/026: {intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling}
- F21V 3/049: {Patterns or structured surfaces for diffusing light, e.g. frosted surfaces}
- F21V 7/0008: {providing for indirect lighting}
- F21V 7/0016: {on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes}
- F21V 13/12: Combinations of only three kinds of elements
- F21V 21/049: {Mounting arrangements for attaching lighting devices to the ceiling, the lighting devices being recessed in a false or stretched ceiling}
- G02B 6/0036: {2-D arrangement of prisms, protrusions, indentations or roughened surfaces}
- G02B 6/0055: {Reflecting element, sheet or layer}
- F21S 8/06: by suspension
- F21Y 2103/10: comprising a linear array of point-like light-generating elements
- F21Y 2105/00: Planar light sources
- F21Y 2115/10: Light-emitting diodes [LED]
- G02B 6/002: {by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces}
- G02B 6/0038: {Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide}
- G02B 6/0043: {provided on the surface of the light guide}
- G02B 6/0091: {of the light source relative to the light guide (G02B6/0021 takes precedence)}
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- E04B: GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS (border constructions of opening in walls, floors or ceilings E06B1/00; {electromagnetic shielding H05K9/0001})
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- 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 light fixture controls lighting distributions with one or more electrically addressable LED boards and a primary optical element which can be back-lit or edge-lit. The light fixture body is configurable, comprising a 3-dimensional housing body with ends that can be cut at a configured angles to create geometric patterns within a ceiling grid installation. The housing body comprises features to retain and align LED boards and the primary optical element. Edge-lit configurations can enable the lighting assembly height to be less than the height of a ceiling grid T-bar. In some embodiments the lighting assembly can also provide structural support within an installed panel system and replace one or more T-bars. The light fixture can be configured to provide low-glare or wide spread “batwing” ambient light or more directional wall wash, task and accent lighting.

## Claims

### Claim 1

A light fixture comprising;
a) an optical assembly comprising;
i) at least one LED board comprising two or more LEDs mounted and positioned on at least one face of a printed circuit board and independently controlled by one or more arranged electrical circuits;
ii) a primary optical element comprising at least one input face and an outer output face; wherein the primary optical element modifies a light distribution from the at least one LED board when light is transmitted through the primary optical element;
iii) at least one reflector or reflective surface;
b) at least one housing body configured to position and retain the at least one LED board and the primary optical element in optical alignment; and
wherein a peak intensity and light distribution from the light fixture are configured by selecting an electrical power to the two or more LEDs via the arranged electrical circuits of the at least one LED board.

### Claim 2 (depends on 1)

The light fixture of claim 1 wherein the primary optical element is edge lit or is a light guide.

### Claim 3 (depends on 2)

The light fixture of claim 2 wherein a height of an LED is less than a thickness of the primary optical element.

### Claim 4 (depends on 2)

The light fixture of claim 2 wherein the primary optical element comprises a single input face which is positioned adjacent to and receiving light from the at least one LED board.

### Claim 5 (depends on 4)

The light fixture of claim 4 further comprising a reflector positioned adjacent to an opposing face of the primary optical element to reflect light emitted from the opposing face back into the primary optical element.

### Claim 6 (depends on 2)

The light fixture of claim 2 wherein the primary optical element comprised of two input faces, each adjacent to and receiving light from at least one LED board.

### Claim 7 (depends on 2)

The light fixture of claim 2 wherein the primary optical element has an optical haze greater than 80 or a clarity less than 25 when measured using ASTM D1003 standard techniques.

### Claim 8 (depends on 1)

The light fixture of claim 1 wherein the primary optical element comprises light scattering features.

### Claim 9 (depends on 8)

The light fixture of claim 8 wherein the light scattering features comprise dispersed regions of refractive index differing from that of a bulk light transmissive material.

### Claim 10 (depends on 9)

The light fixture of claim 9 wherein the dispersed regions are comprised of polymer beads.

### Claim 11 (depends on 8)

The light fixture of claim 8 wherein the light scattering features are surface features upon one or both of the input face and output face of the primary optical element.

### Claim 12 (depends on 8)

The light fixture of claim 8 wherein the primary optical element comprises light redirecting surface features with a lenticular, sawtooth or prism profile.

### Claim 13 (depends on 8)

The light fixture of claim 8 wherein the peak intensity and light distribution from the light fixture are configured by selecting an amount of primary optical element light scattering.

### Claim 14 (depends on 1)

The light fixture of claim 1 comprising two or more arranged electrical circuits wherein a ratio of electrical power applied to multiple individual arranged electrical circuits is used to control a degree of asymmetry or symmetry in the light distribution.

### Claim 15 (depends on 1)

The light fixture of claim 1 comprising two or more arranged electrical circuits wherein a ratio of electrical power applied to differing arranged electrical circuits is used to create one or more peak intensities or lobes in the light distribution.

### Claim 16 (depends on 15)

The light fixture of claim 15 wherein the electrical power is used to control the peak intensities of one or more lobes.

### Claim 17 (depends on 1)

The light fixture of claim 1 further comprising an auxiliary optical element positioned at a configured distance beyond the output face of the primary optical element and retained in position by longitudinally extended support features of the housing body.

### Claim 18 (depends on 17)

The light fixture of claim 17 wherein a light distribution from the auxiliary optical element is different than a light distribution from the output face of the primary optical element.

### Claim 19 (depends on 17)

The light fixture of claim 17 wherein light distribution output from an external face of the auxiliary optical element is less asymmetric than light output from an outer face of the primary optical element.

### Claim 20 (depends on 17)

The light fixture of claim 17 wherein the auxiliary optical element comprises a light scattering region, lenticular pattern, fresnel lens pattern, or other microlens pattern.

### Claim 21 (depends on 1)

The light fixture of claim 1 wherein the light fixture is part of an installed panel system.

### Claim 22 (depends on 21)

The light fixture of claim 21 wherein a primary optical element output face is retained in parallel alignment with an installed panel system plane or acoustic panel or drywall panel.

### Claim 23 (depends on 21)

The light fixture of claim 21 wherein the primary optical element output face is retained at an oblique angle or tilted alignment with an installed panel system plane or acoustic or drywall panel.

### Claim 24 (depends on 21)

The light fixture of claim 21 wherein the installed panel system is from a group including a suspended ceiling grid system, a drywall or wood ceiling installation, or a drywall or wood wall installation.

### Claim 25 (depends on 1)

The light fixture of claim 1 wherein the housing body and primary optical element are in parallel alignment.

### Claim 26 (depends on 1)

The light fixture of claim 1 further comprising an extended edge feature in the form of a leg, prong, clip to aid in retaining and aligning the primary optical element or an auxiliary optical element.

### Claim 27 (depends on 1)

The light fixture of claim 1 further comprising at least one support feature extending from at least one side portion of the housing body and configured to support and conceal an edge of a panel of an installed panel system.

### Claim 28 (depends on 27)

The light fixture of claim 27 wherein the at least one support feature is configured in a 9/16″ or 15/16″ T-bar flat shape.

### Claim 29 (depends on 27)

The light fixture of claim 27 wherein the at least one support feature is configured in a T-bar slotted profile shape.

### Claim 30 (depends on 27)

The light fixture of claim 27 wherein the at least one support feature is configured with a vertical fin or spine further comprising a slot or aperture.

### Claim 31 (depends on 30)

The light fixture of claim 30 configured to attach to T-bar anchor clips of T-bars within a multi T-bar cell array.

### Claim 32 (depends on 27)

The light fixture of claim 27 wherein the at least one support feature is integral to the housing body.

### Claim 33 (depends on 27)

The light fixture of claim 27 wherein the at least one support feature is detachably mounted to the housing body.

### Claim 34 (depends on 1)

The light fixture of claim 1 wherein a height of the light fixture is less than or equal to a height of a ceiling grid T-bar within an installed panel system.

### Claim 35 (depends on 1)

The light fixture of claim 1 wherein the housing body extends longitudinally along a linear longitudinal axis.

### Claim 36 (depends on 1)

The light fixture of claim 1 wherein the housing body extends longitudinally along a non-linear radius.

### Claim 37 (depends on 1)

The light fixture of claim 1 wherein the housing body is manufactured by a continuous extrusion process and cut to length.

### Claim 38 (depends on 1)

The light fixture of claim 1 wherein the primary optical element is manufactured by a continuous extrusion process and cut to length.

### Claim 39 (depends on 38)

The light fixture of claim 38 wherein the primary optical element additionally comprises a co-extruded region of reflective material on one or more of its edges.

### Claim 40 (depends on 38)

The light fixture of claim 38 wherein a region of reflective material is configured in the form of a leg, prong, clip, or other extended edge feature to aid in retaining and aligning the optical element.

### Claim 41 (depends on 1)

The light fixture of claim 1 wherein at least one end of the primary optical element has a configured cut angle that corresponds to a configured cut angle of the housing body.

### Claim 42 (depends on 41)

The light fixture of claim 41 wherein the configured cut angle is not 90 degrees.

### Claim 43 (depends on 1)

The light fixture of claim 1 wherein each end of the housing body is cut at a configured angle that is not 90 degrees.

### Claim 44 (depends on 43)

The light fixture of claim 43 mounted in a ceiling grid cell such that its housing body is at an oblique angle to a T-bar of a ceiling grid cell.

### Claim 45 (depends on 43)

The light fixture of claim 43 wherein the housing body is substantially triangular.

### Claim 46 (depends on 43)

The light fixture of claim 43 mounted in a corner of a ceiling grid cell such that an end plate or end cap rests on a T-bars that are connected within a ceiling grid system.

### Claim 47 (depends on 43)

The light fixture of claim 43 wherein a length of each side portion of the housing body has a different length.

### Claim 48 (depends on 41)

The light fixture of claim 41 wherein the configured cut angle is selected to enable multiple elongate housing bodies to be joined at the configured cut angle and non-joined ends to be enclosed by one or more end plates or end caps.

### Claim 49 (depends on 48)

The light fixture of claim 48 wherein the light fixture is configured as one of the following group; an ‘L’ shape, a ‘V’ shape, a ‘U’ shape, and an ‘X’ shape.

### Claim 50 (depends on 1)

The light fixture of claim 1 further comprising at least one end plate or end cap mounted to an end of the housing body to enclose an internal cavity.

### Claim 51 (depends on 50)

The light fixture of claim 50 wherein a primary optical element end face is positioned parallel and adjacent to the at least one end plate or end cap.

### Claim 52 (depends on 1, 50)

The light fixture of claim 50 wherein the at least one end plate or end cap is configured to mount onto a support feature of another light fixture of claim 1.

### Claim 53 (depends on 50)

The light fixture of claim 50 wherein the at least one end plate or end cap comprises a mounting feature configured to attach over a vertical portion of a ceiling grid T-bar.

### Claim 54 (depends on 50)

The light fixture of claim 50 wherein the at least one end plate or end cap encloses a longitudinal end of multiple housing bodies.

### Claim 55 (depends on 54)

The light fixture of claim 54 wherein the housing bodies are in a parallel arrangement.

### Claim 56 (depends on 55)

The light fixture of claim 55 wherein a configured cut angle of the longitudinal end of multiple elongate housing bodies is not 90 degrees and the end plate or end cap is mounted non-perpendicular to the housing bodies.

### Claim 57 (depends on 56)

The light fixture of claim 56 mounted across a ceiling grid cell of an installed panel system such that the housing bodies are obliquely aligned with ceiling grid T-bars of the ceiling grid cell.

### Claim 58 (depends on 1)

A light fixture assembly comprising multiple light fixtures of claim 1 arranged to produce a geometric shape.

### Claim 59 (depends on 58)

The light fixture assembly of claim 58 wherein the geometric shape is selected from the group consisting of; a square, rectangle, triangle, rhombus, circle, and oval.

### Claim 60 (depends on 59)

The light fixture assembly of claim 59 wherein an electronic controller is attached to one of the light fixtures and supplies power to all of the light fixtures comprising the geometric shape.

### Claim 61 (depends on 59)

The light fixture assembly of claim 59 wherein a geometric pattern of concentrically arranged light fixtures are produced.

### Claim 62 (depends on 61)

The light fixture assembly of claim 61 wherein differing layers of the concentrically arranged light fixtures have differing light distributions.

### Claim 63 (depends on 61)

The light fixture assembly of claim 61 wherein an electronic controller adjusts power to individual concentric layers of multiple light fixtures within a multi-fixture geometric shape to control overall system light distribution.