# US 11,306,877 B2 · Backlit lamp having directional light source > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,306,877 B2 - Document ID: US11306877B2 - Status: Granted - Kind: B2 - Application number: 16/987,730 - Filed: 2020-08-07 - Published: 2020-11-19 - Granted: 2022-04-19 - Earliest claimed: 2017-02-28 - Assignees: Feit Electric Company, Inc. - Applicants: Feit Electric Company, Inc. - Inventors: Alan Barry Feit; Jose Mata - Web page: https://patentgrep.com/patent/US11306877B2 ## CPC - F21K 9/237: Details of housings or cases, i.e. the parts between the light-generating element and the bases; Arrangement of components within housings or cases (F21K9/238 takes precedence) - F21K 9/233: specially adapted for generating a spot light distribution, e.g. for substitution of reflector lamps - F21V 29/70: characterised by passive heat-dissipating elements, e.g. heat-sinks - 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} - F21Y 2105/16: square or rectangular, e.g. for light panels - 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 example embodiment of a backlit lamp comprises a housing, a forward facing directional light source and a rear facing directional light source. The housing may comprise a bowl portion comprising a first joining end and a forward emitting end; and a neck portion comprising a second joining end. The bowl and neck portions are joined at the first and second joining ends. The forward facing directional light source is mounted within the housing and configured to emit light in the direction of the forward emitting end. The rear facing directional light source is mounted within the housing and configured to emit light in an opposite direction from the light emitted by the forward facing directional light source. In an example embodiment, the forward facing and rear facing directional light source comprise light emitting diodes (LEDs). ## Claims ### Claim 1 A housing comprising: a bowl portion comprising a forward end and a sloped interior surface; at least one rear facing LED package facing away from the forward end; and a heat sink having a rear surface and a sloped surface, the sloped surface of the heat sink corresponding to the sloped interior surface of the bowl portion, wherein: the sloped interior surface of the bowl portion is at least partially covered with a coating, the coating being a reflective coating, and a portion of the heat sink other than the rear surface of the heat sink is mounted within the housing by a thermally conductive material other than the coating, such that the heat sink is in thermal contact with the coating, such that heat emitted by the at least one rear facing LED package is passed, via the heat sink, to the coating. ### Claim 2 (depends on 1) The housing of claim 1, wherein: the heat sink comprises a bottom portion, the bottom portion comprising the rear surface and a forward surface; the sloped surface of the heat sink extends from a perimeter of the bottom portion; and the forward surface is bordered by the sloped surface of the heat sink. ### Claim 3 (depends on 2) The housing of claim 2, wherein one or more forward facing LED packages facing toward the forward end are mounted on a forward board, such that the forward end defines an emitting end, the at least one rear facing LED package is mounted on a component board, the forward board is mounted to the forward surface, and the component board is mounted to the rear surface. ### Claim 4 (depends on 3) The housing of claim 3, further comprising one or more driver circuit components, the one or more driver circuit components being mounted on the component board. ### Claim 5 (depends on 1) The housing of claim 1, wherein the sloped interior surface of the bowl portion is a material selected from the group consisting of: plastic, ceramic material, metal, aluminum, glass, and hard-pressed glass. ### Claim 6 (depends on 1) The housing of claim 1, wherein: the bowl portion comprises a first joining end, the housing further comprises a neck portion comprising a second joining end, the bowl portion and the neck portion are joined at the first joining end and the second joining end, and the neck portion further comprises a base end disposed opposite the second joining end and a neck cavity disposed between the base end and the second joining end. ### Claim 7 (depends on 6) The housing of claim 6, wherein the neck cavity comprises an open space having component electrical leads passing there-through. ### Claim 8 (depends on 7) The housing of claim 7, wherein the component electrical leads provide electrical communication between one or more electrical contacts of a base secured to the base end and one or more driver circuitry components mounted within the housing. ### Claim 9 (depends on 7) The housing of claim 7, wherein electrical leads for the one or more forward facing LED packages pass through an opening from the rear surface to a forward surface of the heat sink. ### Claim 10 (depends on 6) The housing of claim 6, wherein the neck cavity does not contain any driver circuitry components. ### Claim 11 (depends on 6) The housing of claim 6, wherein a sidewall of the neck portion is (a) clear or (b) frosted. ### Claim 12 (depends on 1) The housing of claim 1, wherein the reflective coating is an aluminum coating and the housing further comprises an optical component enclosing the forward end. ### Claim 13 A housing comprising: a bowl portion comprising a forward emitting end and a sloped interior surface; a forward directional light source facing toward the forward emitting end; a rear directional light source facing away from the forward emitting end; and a heat sink having a rear surface and a sloped surface, the sloped surface of the heat sink corresponding, at least in part, to the sloped interior surface of the bowl portion, wherein: the sloped interior surface of the bowl portion is at least partially covered with a coating, the coating being a reflective coating, and a portion of the heat sink other than the rear surface of the heat sink is mounted to and within the housing by a thermally conductive material other than the coating, such that the heat sink is in thermal contact with the coating, such that heat emitted by the at least one rear facing LED package is passed, via the heat sink, to the coating. ### Claim 14 (depends on 13) The housing of claim 13, wherein: the bowl portion comprises a first joining end, the housing further comprises a neck portion comprising a second joining end, the bowl portion and the neck portion are joined at the first joining end and the second joining end, the neck portion further comprises a base end and a sidewall extending between the base end and the second joining end, at least a portion of light emitted by the rear facing directional light source passes through the sidewall; and the sidewall of the neck portion is (a) clear or (b) frosted. ### Claim 15 (depends on 13) The housing of claim 13, wherein the reflective coating is an aluminum coating. ### Claim 16 (depends on 13) The housing of claim 13, further comprising an optical component enclosing the forward end. ### Claim 17 (depends on 13) The housing of claim 13, wherein: the bowl portion comprises a first joining end, the housing further comprises a neck portion comprising a second joining end, the bowl portion and the neck portion are joined at the first joining end and the second joining end, and the neck portion further comprises a base end disposed opposite the second joining end and a neck cavity disposed between the base end and the second joining end. ### Claim 18 (depends on 17) The housing of claim 17, wherein the neck cavity comprises an open space having component electrical leads passing there-through. ### Claim 19 (depends on 18) The housing of claim 18, wherein the electrical leads provide electrical communication between one or more electrical contacts of a base secured to the base end and the rear facing directional light source. ### Claim 20 (depends on 13) The housing of claim 13, wherein electrical leads for the forward directional light source pass through an opening from the rear surface of the heat sink to a forward surface of the heat sink.