LED-based light with canted outer walls

• US 10,690,296 B2
• Filed: 12/18/2018
• Issued: 06/23/2020
• Est. Priority Date: 06/01/2015
• Status: Active Grant

• Current Assignee: Ilumisys Incorporated (Altair Engineering Incorporated)
• Original Assignee: Ilumisys Incorporated (Altair Engineering Incorporated)
• Inventors: Amrine, Jr., James M., Ivey, John
• Primary Examiner(s): Bannan, Julie A
• Application Number:
  US16/223,762
• Publication Number:
  US 20190120439A1
• Time in Patent Office: 553 Days
• CPC Class Codes: F21K 9/27 Retrofit light sources for lighting devices with two fittings for each light source, e.g. for substitution of fluorescent tubes
• CPC Class Codes: F21K 9/278 Arrangement or mounting of circuit elements integrated in the light source
• CPC Class Codes: F21K 9/60 Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
• CPC Class Codes: F21K 9/66 Details of globes or covers forming part of the light source
• CPC Class Codes: F21V 17/104 using feather joints, e.g. tongues and grooves, with or without friction
• CPC Class Codes: F21V 19/003 Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
• CPC Class Codes: F21V 19/0045 by tongue and groove connections, e.g. dovetail interlocking means fixed by sliding
• CPC Class Codes: F21V 23/006 the substrate being distinct from the light source holder
• CPC Class Codes: F21V 23/023 Power supplies in a casing F21V23/003 takes precedence
• CPC Class Codes: F21V 23/06 the elements being coupling devices , e.g. connectors
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 3/02 characterised by the shape
• CPC Class Codes: F21Y 2101/00 Point-like light sources
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

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

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;

an 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 a respective bi-pin connector protruding from the end cap, the bi-pin connectors being compatible with a fluorescent light fixture; and

a support enclosed by the housing, the support comprising a planar portion and two sidewalls extending from opposing ends of the planar portion, each sidewall being contoured to and aligned flush against a respective curved interior portion of the housing, and the LED circuit board being positioned on the planar portion.

2. The LED-based light of claim 1, wherein the surfaces of 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.

3. The LED-based light of claim 1, wherein the surfaces of 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.

4. The LED-based light of claim 1, wherein the surface of 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.

5. The LED-based light of claim 4, 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.

6. 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.

7. The LED-based light of claim 1, wherein the support creates a bipartite configuration which splits the cavity into a first cavity and a second cavity.

8. The LED-based light of claim 7, wherein the LED circuit board is supported by the support in the first cavity.

9. The LED-based light of claim 8, further comprising a power supply circuit board positioned in the second cavity and supported by the support.

10. The LED-based light of claim 1, wherein the each sidewall defines a respective channel, and wherein the power supply circuit board is inserted in the channels.