# US 12,222,085 B2 · Light fixture including a housing for a ballast

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- Number: US 12,222,085 B2
- Document ID: US12222085B2
- Status: Granted
- Kind: B2
- Application number: 18/645,776
- Filed: 2024-04-25
- Published: 2024-08-15
- Granted: 2025-02-11
- Earliest claimed: 2020-08-12
- Assignees: HGCI, Inc.
- Applicants: HGCI, Inc.
- Inventors: Dengke Cai
- Web page: https://patentgrep.com/patent/US12222085B2

## CPC

- F21S 8/036: {by means of a rigid support, e.g. bracket or arm}
- A01G 9/249: {Lighting means (with special arrangements for promoting growth A01G7/045)}
- 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 23/026: {Fastening of transformers or ballasts}
- F21V 29/508: of electrical circuits
- F21V 29/74: with fins or blades
- F21V 29/75: with fins or blades having different shapes, thicknesses or spacing
- F21V 29/763: {the planes containing the fins or blades having the direction of the light emitting axis}
- F21Y 2115/10: Light-emitting diodes [LED]
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- A01G: HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING (picking of fruits, vegetables, hops or the like A01D46/00; propagating unicellular algae C12N1/12)
- 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

## Abstract

A light fixture includes a lighting module and a ballast. The ballast includes a housing and a power module. The housing includes a front cover and a rear cover. The front cover includes a front wall and upper fins and lower fins that extend from the front wall. The rear cover includes a rear wall and first fins and second fins that extend from the rear wall. The power module includes a plurality of heat generating semiconductor components that are thermally coupled with the rear wall to facilitate cooling thereof.

## Claims

### Claim 1

A light fixture comprising:
a reflector comprising an upper edge and a lower lip, the lower lip having a front edge and a rear edge that cooperate to define an opening;
a light module disposed at least partially within the reflector and configured to generate light for delivery through the opening; and
a ballast coupled with the reflector and comprising:
a housing comprising a front wall and a rear wall; and
a power module disposed at least partially within the housing and comprising at least one heat generating semiconductor component, wherein:
the front edge and the rear edge reside in a first imaginary plane such that the light generated by the light module extends through the first imaginary plane;
a second imaginary plane that is parallel to the first imaginary plane is disposed between the light module and the upper edge of the reflector;
the second imaginary plane intersects each of the front wall and the rear wall; and
the at least one heat generating semiconductor component is thermally coupled with the rear wall at a location that is above the second imaginary plane such that the light module and the at least one heat generating semiconductor component is disposed entirely on opposite sides of the second imaginary plane.

### Claim 2 (depends on 1)

The light fixture of claim 1 further comprising a bracket and wherein the ballast is coupled with the reflector via the bracket.

### Claim 3 (depends on 1)

The light fixture of claim 1 wherein the reflector and the ballast are spaced from each other along the second imaginary plane.

### Claim 4 (depends on 1)

The light fixture of claim 1 wherein the at least one heat generating semiconductor component comprises a plurality of MOSFETs.

### Claim 5 (depends on 4)

The light fixture of claim 4 wherein all of the at least one heat generating semiconductor components present on the power module and thermally coupled with the rear wall are disposed at a location that is above the second imaginary plane.

### Claim 6 (depends on 1)

The light fixture of claim 1 wherein the at least one heat generating semiconductor component is thermally coupled with the rear wall via thermally conductive paste.

### Claim 7

A light fixture comprising:
a bracket;
a reflector coupled with the bracket and comprising an upper edge and a lower lip, the lower lip having a front edge and a rear edge that cooperate to define an opening;
a light module disposed at least partially within the reflector and configured to generate light for delivery through the opening; and
a ballast coupled with the reflector and comprising:
a housing comprising:
a rear wall;
a front wall that is more proximate to the reflector than the rear wall; and
a plurality of upper fins and lower fins extending from the front wall to facilitate cooling thereof; and
a power module disposed at least partially within the housing and comprising at least one heat generating semiconductor component, wherein:
the reflector and the ballast are spaced from each other;
the housing defines a centerline that extends between the front wall and the rear wall;
the plurality of upper fins and the plurality of lower fins are disposed on opposite sides of the centerline;
the front wall at the plurality of upper fins is angled towards the rear wall relative to the centerline by a first acute angle; and
the front wall at the plurality of lower fins is angled towards the rear wall relative to the centerline by a second acute angle.

### Claim 8 (depends on 7)

The light fixture of claim 7 wherein the first acute angle and the second acute angle are less than sixty degrees.

### Claim 9 (depends on 7)

The light fixture of claim 7 wherein:
the front edge and the rear edge reside in a first imaginary plane such that the light generated by the light module extends through the first imaginary plane; and
the reflector and the ballast are spaced from each other such that they are disposed entirely on opposite sides of a second imaginary plane that is perpendicular to the first imaginary plane.