Reflector and lamp comprised thereof

• US 10,139,095 B2
• Filed: 11/10/2014
• Issued: 11/27/2018
• Est. Priority Date: 05/04/2012
• Status: Active Grant

• Current Assignee: Savant Technologies, LLC (Savant Systems, LLC)
• Original Assignee: GE Lighting Solutions LLC (Savant Systems, LLC)
• Inventors: Yoder, Benjamin Lee, Johnson, William Stewart, Rebman, Roderick Fitzgerald, Kuenzler, Glenn Howard, Mayer, Mark J., Chinniah, Jeyachandrabose
• Primary Examiner(s): Ton, Anabel
• Application Number:
  US14/536,957
• Publication Number:
  US 20160131333A1
• Time in Patent Office: 1,478 Days
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21K 9/238 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: F21V 13/08 the elements being filters or photoluminescent elements and reflectors
• CPC Class Codes: F21V 23/009 the casing being inside the housing of the lighting device
• CPC Class Codes: F21V 29/507 of means for protecting lighting devices from damage, e.g. housings
• CPC Class Codes: F21V 29/60 characterised by the use of a forced flow of gas, e.g. air
• CPC Class Codes: F21V 29/63 using electrically-powered vibrating means; using ionic wind
• CPC Class Codes: F21V 29/67 characterised by the arrangement of fans
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/74 with fins or blades
• CPC Class Codes: F21V 29/75 with fins or blades having different shapes, thicknesses or spacing
• CPC Class Codes: F21V 29/773 the planes containing the fins or blades having the direction of the light emitting axis
• CPC Class Codes: F21V 29/83 the elements having apertures, ducts or channels, e.g. heat radiation holes
• CPC Class Codes: F21V 29/87 Organic material, e.g. filled polymer composites; Thermo-conductive additives or coatings therefor
• CPC Class Codes: F21V 3/02 characterised by the shape
• CPC Class Codes: F21V 7/0091 using total internal reflection
• CPC Class Codes: F21V 7/041 with conical or pyramidal surface
• CPC Class Codes: F21V 7/048 with facets structure
• CPC Class Codes: F21V 7/28 characterised by coatings
• CPC Class Codes: F21Y 2105/00 : Planar light sources
• CPC Class Codes: F21Y 2105/10 : comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2113/13 : comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2115/10 : Light-emitting diodes [LED]
• CPC Class Codes: F21Y 2115/15 : Organic light-emitting diodes [OLED]
• CPC Class Codes: G02B 27/0972 : Prisms prisms per se G02B5/04
• CPC Class Codes: Y02B 20/30 : Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

Embodiments of a lamp that utilizes a reflector and a light source with light-emitting diode (LED) devices to generate an optical intensity distribution substantially similar to that of a conventional incandescent light bulb. These embodiments utilize an operation configuration with parameters that define relationships between components of the lamp to generate the optical intensity distribution. These parameters can, in one example, set out the position of the reflector relative to the light source as well as the ratio between dimensions of the reflector and the light source. In one embodiment, the reflector is in position relative to the light source to form a blocking area proximate the light source that defines a part of the lamp that does not diffuse light.

Claims

1. A lamp with a central axis, comprising:

an envelope forming an interior volume;

a reflector disposed in the interior volume at a reflector plane that is tangent to at least two points on the reflector, wherein the reflector comprises a plurality of facets disposed circumferentially about the central axis, wherein the facets are configured to at least partially reflect light from the light source; and

a light source that is configured to generate light onto the reflector,

wherein the reflector and the light source each have a profile with an outer profile diameter that forms a reflector-to-light source size ratio in a range of from about 2.8 to about 3.6;

wherein, the envelope is configured to diffuse light from the light source with an intensity distribution of a level of approximately 100±

25% over a range of values for a latitudinal co-ordinate θ

between zero degrees (0°

) and one hundred thirty-five degrees (135°

) or greater.

2. The lamp of claim 1, further comprising a heat sink with a first sink element in thermal contact with the light source.

3. The lamp of claim 1, wherein the envelope has an outer surface that is configured to fit within a lamp profile defined by ANSI standards for an A-19 lamp.

4. The lamp of claim 1, wherein the facets have an exterior facet profile with a first face, a second face opposing the first face at an angle, and a facet edge disposed therebetween.

5. The lamp of claim 4, wherein the reflector has an outer peripheral edge, and wherein the facet edge tapers from the outer peripheral edge toward the central axis.

6. The lamp of claim 1, wherein the reflector forms an internal reflection lens.

7. A lamp, comprising:

a reflector having a central axis and a plurality of facets disposed circumferentially about the central axis, wherein the plurality of facets are configured to at least partially reflect light, wherein the facets have an exterior facet profile with a first face, a second face opposing the first face at an angle, and a facet edge disposed therebetween, wherein adjacent facets in the plurality of facets form a valley edge; and

a light source spaced apart from the reflector, the light source comprising a plurality of light-emitting diode (LED) devices that are configured to generate light onto the reflector,

wherein the reflector and the light source each have a profile with an outer profile diameter that forms a reflector-to-light source ratio in a range of from about 2.5 to about 3.6.

8. The lamp of claim 7, further comprising a base with a heat sink comprising a first sink element in thermal contact with the light source, wherein the envelop is configured to diffuse light from the light source with an intensity distribution of a level of approximately 100±

25% over a range of values for a latitudinal co-ordinate θ

between zero degrees (0°

) and one hundred thirty-five degrees (135°

) or greater.

9. The lamp of claim 7, wherein the facet edge and the valley edge form, respectively, a first radius and a second radius that is the same as the first radius.

10. The lamp of claim 7, wherein the reflector forms an internal reflection lens.

11. A lamp with a central axis, comprising:

an envelope forming an interior volume;

a reflector disposed in the interior volume at a reflector plane that is tangent to at least two points on the reflector, wherein the reflector comprises a plurality of facets disposed circumferentially about the central axis, wherein the facets are configured to at least partially reflect light from the light source; and

a light source that is configured to generate light onto the reflector,

wherein the reflector and the light source each have a profile with an outer profile diameter that forms a reflector-to-light source size ratio in a range of from about 2.8 to about 3.6;

wherein the lamp further comprises a heat sink with a first sink element in thermal contact with the light source.