# US 11,028,972 B2 · LED-based light with canted outer walls

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- Number: US 11,028,972 B2
- Document ID: US11028972B2
- Status: Granted
- Kind: B2
- Application number: 16/907,590
- Filed: 2020-06-22
- Published: 2020-10-08
- Granted: 2021-06-08
- Earliest claimed: 2015-06-01
- Assignees: iLumisys, Inc.
- Applicants: iLumisys, Inc.
- Inventors: James M. Amrine, Jr.; John Ivey
- Web page: https://patentgrep.com/patent/US11028972B2

## CPC

- F21K 9/27: Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
- F21K 9/66: Details of globes or covers forming part of the light source
- F21V 3/02: characterised by the shape
- F21V 19/003: {Fastening of light source holders, e.g. of circuit boards or substrates holding light sources}
- F21V 23/023: {Power supplies in a casing (F21V23/003 takes precedence)}
- F21V 23/06: the elements being coupling devices {, e.g. connectors}
- F21K 9/278: Arrangement or mounting of circuit elements integrated in the light source
- F21K 9/60: Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21V 17/104: {using feather joints, e.g. tongues and grooves, with or without friction}
- F21V 19/0045: {by tongue and groove connections, e.g. dovetail interlocking means fixed by sliding}
- F21V 23/006: {the substrate being distinct from the light source holder}
- F21V 29/70: characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21Y 2101/00: Point-like light sources
- F21Y 2103/10: comprising a linear array of point-like light-generating elements
- F21Y 2115/10: Light-emitting diodes [LED]
- F21K: NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- 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

An LED-based light has an elongate housing having a longitudinal axis and a vertical axis, the housing defined by a base and two canted outer walls meeting opposite the base, the housing defining a cavity. An LED circuit board on which a plurality of LEDs are located is positioned within the cavity. End caps are positioned at opposite ends of the housing.

## Claims

### Claim 1

An LED-based light, comprising:
an elongate tubular housing having longitudinal axis and a vertical axis orthogonal to the longitudinal axis,
wherein the housing defines an outer periphery of the LED-based light and a cavity,
wherein the housing comprises a base, a first canted outer wall, and a second canted outer wall, and
wherein a surface of each of the base, the first canted outer wall, and the second canted outer wall defines a substantially identical arced profile in cross-section orthogonal to the longitudinal axis;
a LED circuit board positioned within the cavity;
a plurality of LEDs positioned on the LED circuit board;
end caps positioned at opposite ends of the housing, wherein each end cap comprises:
an open end configured to receive a respective end of the housing,
a closed end comprising a first surface and a second surface encircling the first surface, wherein each of the first surface and the second surface are tapered longitudinally towards the open end, and
a bi-pin connector protruding from the closed end,
wherein each end cap defines a first corner, a second corner, and a third corner, and wherein for each end cap, a tapering of the first surface and the second surface is greatest in a region proximate to the first corner.

### Claim 2 (depends on 1)

The LED-based light of claim 1, wherein the first corner of each end cap corresponds to an intersection between the first canted outer wall and the second canted outer wall.

### Claim 3 (depends on 2)

The LED-based light of claim 2, wherein the LED circuit board faces the intersection between the first canted outer wall and the second canted outer wall.

### Claim 4 (depends on 3)

The LED-based light of claim 3, wherein the LED circuit board is positioned flush against the case.

### Claim 5 (depends on 1)

The LED-based light of claim 1, wherein each end cap defines a pair of opposing channels at the open end of the end cap, wherein the pair of opposing channels is configured to slidably receive a respective end of the LED circuit board.

### Claim 6 (depends on 5)

The LED-based light of claim 5, wherein each end cap comprises one or more shoulder surfaces extending from at least one of the base, the first canted outer wall, and the second canted outer wall towards the open end of the end cap, wherein the one or more shoulder surfaces are configured to constrain a relative longitudinal movement of the housing relative to the end cap.

### Claim 7 (depends on 1)

The LED-based light of claim 1, wherein the base, the first canted outer wall, and the second canted outer wall substantially form a triangle in cross-section orthogonal to the longitudinal axis.

### Claim 8 (depends on 1)

The LED-based light of claim 1, wherein the base, the first canted outer wall, and the second canted outer wall substantially form an equilateral triangle in cross-section orthogonal to the longitudinal axis.

### Claim 9 (depends on 1)

The LED-based light of claim 1, wherein the first canted outer wall defines a first profile in cross-section orthogonal to the longitudinal axis, the first profile extending from a top of the first canted outer wall to a point of intersection between the first canted outer wall and the base,
wherein the first profile comprises a first section extending between a first point and a second point, wherein the first point is defined by a first line tangent to the housing and at a 45° angle from a horizontal line, and wherein the second point is defined by a second line tangent to the housing and at a 90° angle from the horizontal line, and
wherein the first section is at least 30 percent of the first profile.

### Claim 10 (depends on 9)

The LED-based light of claim 9, wherein the surface of the second canted outer wall defines a second profile in cross-section orthogonal to the longitudinal axis, the second profile extending from a top of the second canted outer wall to a point of intersection between the second canted outer wall and the base,
wherein the second profile comprises a second section extending between a third point and a fourth point, wherein the third point is defined by a third line tangent to the housing and at a 45° angle from the horizontal line, and wherein the fourth point is defined by a fourth line tangent to the housing and at a 90° angle from the horizontal line, and
wherein the second section is at least 30 percent of the second profile.

### Claim 11 (depends on 1)

The LED-based light of claim 1, wherein the LED-based light is operable to emit light according to a light distribution profile, wherein the light distribution profile comprises a first portion protruding from the LED-based light in a first direction angled with respect to the vertical axis, and a second portion protruding from the LED-based light in a second direction angled with respect to the vertical axis.

### Claim 12

An LED-based light, comprising:
an elongate tubular housing having longitudinal axis and a vertical axis orthogonal to the longitudinal axis,
wherein the housing defines an outer periphery of the LED-based light and a cavity,
wherein the housing comprises a base, a first canted outer wall, and a second canted outer wall, and
wherein a surface of each of the base, the first canted outer wall, and the second canted outer wall defines a substantially identical arced profile in cross-section orthogonal to the longitudinal axis;
a LED circuit board positioned within the cavity;
a plurality of LEDs positioned on the LED circuit board;
end caps positioned at opposite ends of the housing, wherein each end cap comprises:
an open end configured to receive a respective end of the housing,
a closed end comprising a first surface and a second surface encircling the first surface, wherein each of the first surface and the second surface are tapered longitudinally towards the open end, and
a bi-pin connector protruding from the closed end,
wherein each end cap defines a pair of opposing channels at the open end of the end cap, and wherein the pair of opposing channels is configured to slidably receive a respective end of the LED circuit board.

### Claim 13 (depends on 12)

The LED-based light of claim 12,
wherein each end cap defines a first corner, a second corner, and a third corner, and
wherein for each end cap, a tapering of the first surface and the second surface is greatest in a region proximate to the first corner.

### Claim 14 (depends on 13)

The LED-based light of claim 13, wherein the first corner of each end cap corresponds to an intersection between the first canted outer wall and the second canted outer wall.

### Claim 15 (depends on 14)

The LED-based light of claim 14, wherein the LED circuit board faces the intersection between the first canted outer wall and the second canted outer wall.

### Claim 16 (depends on 15)

The LED-based light of claim 15, wherein the LED circuit board is positioned flush against the case.

### Claim 17 (depends on 12)

The LED-based light of claim 12, wherein each end cap comprises one or more shoulder surfaces extending from at least one of the base, the first canted outer wall, and the second canted outer wall towards the open end of the end cap, wherein the one or more shoulder surfaces are configured to constrain a relative longitudinal movement of the housing relative to the end cap.

### Claim 18 (depends on 12)

The LED-based light of claim 12, wherein the base, the first canted outer wall, and the second canted outer wall substantially form a triangle in cross-section orthogonal to the longitudinal axis.

### Claim 19 (depends on 12)

The LED-based light of claim 12, wherein the base, the first canted outer wall, and the second canted outer wall substantially form an equilateral triangle in cross-section orthogonal to the longitudinal axis.

### Claim 20 (depends on 12)

The LED-based light of claim 12, wherein the first canted outer wall defines a first profile in cross-section orthogonal to the longitudinal axis, the first profile extending from a top of the first canted outer wall to a point of intersection between the first canted outer wall and the base,
wherein the first profile comprises a first section extending between a first point and a second point, wherein the first point is defined by a first line tangent to the housing and at a 45° angle from a horizontal line, and wherein the second point is defined by a second line tangent to the housing and at a 90° angle from the horizontal line, and
wherein the first section is at least 30 percent of the first profile.

### Claim 21 (depends on 20)

The LED-based light of claim 20, wherein the surface of the second canted outer wall defines a second profile in cross-section orthogonal to the longitudinal axis, the second profile extending from a top of the second canted outer wall to a point of intersection between the second canted outer wall and the base,
wherein the second profile comprises a second section extending between a third point and a fourth point, wherein the third point is defined by a third line tangent to the housing and at a 45° angle from the horizontal line, and wherein the fourth point is defined by a fourth line tangent to the housing and at a 90° angle from the horizontal line, and
wherein the second section is at least 30 percent of the second profile.

### Claim 22 (depends on 12)

The LED-based light of claim 12, wherein the LED-based light is operable to emit light according to a light distribution profile, wherein the light distribution profile comprises a first portion protruding from the LED-based light in a first direction angled with respect to the vertical axis, and a second portion protruding from the LED-based light in a second direction angled with respect to the vertical axis.