Retrofit-style lamp and fixture, each including a one-dimensional linear batwing lens

• US 9,291,330 B2
• Filed: 02/19/2013
• Issued: 03/22/2016
• Est. Priority Date: 12/11/2009
• Status: Active Grant

• Current Assignee: ABL IP Holding LLC (Acuity Brands, Inc.)
• Original Assignee: OSRAM Sylvania Inc. (Ams-Osram AG)
• Inventors: Yang, Yi, Harriott, Douglas, Li, Li
• Primary Examiner(s): Ton, Anabel
• Application Number:
  US13/770,297
• Publication Number:
  US 20130163245A1
• Time in Patent Office: 1,127 Days
• Field of Search: 362/235, 362/249.02
• US Class Current: 1/1
• CPC Class Codes: F21K 9/69 Details of refractors forming part of the light source
• CPC Class Codes: F21S 4/28 rigid, e.g. LED bars
• CPC Class Codes: F21V 15/013 the housing being an extrusion
• CPC Class Codes: F21V 17/104 using feather joints, e.g. tongues and grooves, with or without friction
• 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: F21V 3/04 characterised by materials, surface treatments or coatings
• CPC Class Codes: F21V 5/04 of lens shape
• CPC Class Codes: F21W 2131/305 for refrigerators
• 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]
• CPC Class Codes: G02B 19/0028 refractive and reflective surfaces, e.g. non-imaging catadioptric systems
• CPC Class Codes: G02B 19/0066 in the form of an LED array

Abstract

A retrofit-style lamp is disclosed. The retrofit-style lamp includes a plurality of light sources, and a one-dimensional linear batwing lens. The one-dimensional linear batwing lens beam shapes light emitted by at least two light sources of the plurality of light sources. The retrofit-style lamp also includes a housing including the plurality of light sources, and attached to the one-dimensional linear batwing lens. The combination of housing and lens is then itself fitted with endcaps, including electrical connectors, for placement within a fixture, such as within an existing conventional fluorescent tube fixture located within a storage structure, for example a refrigeration case. Alternatively, the plurality of light sources, the one-dimensional linear batwing lens, and the housing may be formed, along with a power supply, as a standalone retrofit fixture for use in enclosed storage structures, such as refrigeration cases, where the retrofit fixture replaces a conventional fluorescent fixture.

Claims

1. A lamp comprising:

a plurality of light sources;

a housing defining in part a region in which the plurality of light sources is located, wherein the housing includes a connector capable of connecting to a corresponding socket;

an electrical component to deliver power to the plurality of light sources from the corresponding socket; and

a one-dimensional linear batwing lens comprising;

a bottom edge of a lower portion of the one-dimensional linear batwing lens, wherein the bottom edge has a non-linear shape that results in a first cylindrical arc and a second cylindrical arc on opposite sides of a center of the bottom edge, wherein the first cylindrical arc has a first radius of curvature and the second cylindrical arc has a second radius of curvature;

a left edge of an upper portion of the one-dimensional linear batwing lens, wherein the left edge is located above the housing;

a right edge of the upper portion, wherein the right edge is located above the housing; and

a first outer edge and a second outer edge of the upper portion;

wherein the first outer edge extends convexly out from a center of the upper portion towards the left edge and the second outer edge extends convexly out from the center of the upper portion towards the right edge, defining a dip therebetween, wherein a first angle between the first outer edge and the left edge is obtuse, and wherein a second angle between the second outer edge and the right edge is obtuse.

2. The lamp of claim 1, wherein the bottom edge further comprises a first linear surface extending from the first cylindrical arc away from the region and a second linear surface extending from the second cylindrical arc away from the region, wherein a portion of the first linear surface rests on the housing and a portion of the second linear surface rests on the housing.

3. The lamp of claim 2, wherein the one-dimensional linear batwing lens further comprises:

a first post extending perpendicularly from the first linear surface; and

a second post extending perpendicularly from the second linear surface.

4. The lamp of claim 3, wherein the first post comprises a first tab extending perpendicularly from the first post towards the region, and wherein the second post comprises a second tab extending perpendicularly from the second post towards the region.

5. The lamp of claim 4, wherein the housing comprises:

a first upper wall and a second upper wall on an exterior of the housing, each extending from the housing towards the upper portion of the one-dimensional linear batwing lens;

a first housing post extending from the housing to the first linear surface of the bottom edge of the one-dimensional linear batwing lens; and

a second housing post extending from the housing to the second linear surface of the bottom edge;

wherein the first upper wall and the first housing post define a first cavity to receive the first post, and wherein the second upper wall and the second housing post define a second cavity to receive the second post.

6. The lamp of claim 5, wherein the first housing post comprises a first housing tab extending perpendicularly from the first housing post away from the region, and wherein the second housing post comprises a second housing tab extending perpendicularly from the second housing post away from the region.

7. The lamp of claim 6, wherein the first post and the first tab interact with the first housing post and the first housing tab and the second post and the second tab interact with the second housing post and the second housing tab to couple the one-dimensional linear batwing lens to the housing.

8. The lamp of claim 5, wherein the first upper wall includes a first edge and the second upper wall includes a second edge, such that the first upper wall and the second upper wall each create a precise mechanical cutoff of the one-dimensional linear batwing lens by forming a respective cutoff corner.

9. The lamp of claim 8, wherein the first post includes a first side edge adjacent the first edge of the first upper wall and wherein the second post includes a second side edge adjacent the second edge of the second upper wall.

10. The lamp of claim 9, wherein the first side edge extends past a top of the first upper wall, wherein a first top edge extends from the first side edge to the left edge of the upper portion of the one-dimensional linear batwing lens, forming a first lens corner, and wherein the second side edge extends past a top of the second upper wall, wherein a second top edge extends from the second side edge to the right edge of the upper portion, forming a second lens corner.

11. The lamp of claim 10, wherein the first lens corner of the one-dimensional linear batwing lens rests on the cutoff corner of the first upper wall of the housing, and wherein the second lens corner of the one-dimensional linear batwing lens rests on the cutoff corner of the second upper wall of the housing.

12. The lamp of claim 1, wherein the first outer edge has a first radius of curvature and a second radius of curvature each measured from a location below the first outer edge, wherein the left edge has a third radius of curvature measured from a location below the center of the bottom edge, and wherein the first radius of curvature, the second radius of curvature, and the third radius of curvature are equal.

13. The lamp of claim 12, wherein the second outer edge has a fourth radius of curvature and a fifth radius of curvature each measured from a location below the second outer edge, wherein the right edge has a sixth radius of curvature measured from a location below the center of the bottom edge, and wherein the fourth radius of curvature, the fifth radius of curvature, and the sixth radius of curvature are substantially equal.

14. The lamp of claim 13, wherein the first radius of curvature, the second radius of curvature, the third radius of curvature, the fourth radius of curvature, the fifth radius of curvature, and the sixth radius of curvature are all substantially equal.

15. The lamp of claim 1, wherein the plurality of light sources comprises a plurality of solid state light sources.

16. The lamp of claim 15, wherein the electronic component is a driver for the plurality of solid state light sources.

17. A lighting fixture, comprising:

a plurality of light sources;

a power supply to deliver power to the plurality of light sources;

a housing defining in part a region in which the plurality of light sources is located, wherein the housing includes the power supply; and

a one-dimensional linear batwing lens comprising;

a bottom edge of a lower portion of the one-dimensional linear batwing lens, wherein the bottom edge has a non-linear shape that results in a first cylindrical arc and a second cylindrical arc on opposite sides of a center of the bottom edge, wherein the first cylindrical arc has a first radius of curvature and the second cylindrical arc has a second radius of curvature;

a left edge of an upper portion of the one-dimensional linear batwing lens, wherein the left edge is located above the housing;

a right edge of the upper portion, wherein the right edge is located above the housing; and

a first outer edge and a second outer edge of the upper portion;

wherein the first outer edge extends convexly out from a center of the upper portion towards the left edge and the second outer edge extends convexly out from the center of the upper portion towards the right edge, defining a dip therebetween, wherein a first angle between the first outer edge and the left edge is obtuse, and wherein a second angle between the second outer edge and the right edge is obtuse.