# US 11,112,085 B2 · Lighting device housing, luminaire and method of manufacture > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,112,085 B2 - Document ID: US11112085B2 - Status: Granted - Kind: B2 - Application number: 16/770,001 - Filed: 2018-12-04 - Published: 2021-07-08 - Granted: 2021-09-07 - Earliest claimed: 2017-12-15 - Assignees: Signify Holding B.V. - Applicants: Signify Holding B.V. - Inventors: Rifat Ata Mustafa Hikmet; Bert Wouters; Paulus Albertus Van Hal; Johannes Petrus Maria Ansems - Web page: https://patentgrep.com/patent/US11112085B2 ## CPC - F21V 7/005: {with an elongated shape to cooperate with linear light sources} - F21S 4/28: rigid, e.g. LED bars - F21V 7/06: with parabolic curvature - F21V 15/01: Housings, e.g. material or assembling of housing parts (F21V15/02 takes precedence {housings forming signs or letters G09F13/04}) - F21Y 2115/10: Light-emitting diodes [LED] - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS - 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 A housing (10) for a lighting device is disclosed. The housing comprises an elongate base region (21) and opposing elongate sidewalls (23) extending from opposite elongate sides of the elongate base region towards respective terminal ends (24), wherein each of the opposing elongate sidewalls (23) has an optically transmissive inner surface (11) separated from an outer surface (13) by a distance of 5 millimeters or less to form a cavity (15) for housing a reflective foil or a thermally conductive member. The inner surface (11) extends across the elongate base region (21), and it comprises a recess (25) in the elongate base region (21) for housing a light engine (31). Also disclosed is a luminaire (1) including such a housing (10) and a method of manufacturing such an optically transmissive housing (10). ## Claims ### Claim 1 A housing for a lighting device, wherein the housing comprises an elongate base region and opposing elongate sidewalls extending from opposite elongate sides of the elongate base region towards respective terminal ends, wherein each of the opposing elongate sidewalls has an optically transmissive inner surface separated from an outer surface by a distance of 5 millimeters or less to form a cavity for housing a reflective foil or a thermally conductive member, wherein the inner surface extends across the elongate base region, and wherein the inner surface comprises a recess in the elongate base region for housing a light engine, wherein the housing further comprises a light exit window extending across the respective terminal ends of the opposing elongate sidewalls distal to the elongate base region. ### Claim 2 (depends on 1) The housing according to claim 1, wherein the housing is made of a polymer or polymer blend. ### Claim 3 (depends on 1) The housing according to claim 1, wherein the light exit window is double-skinned such that the cavity extends into the light exit window. ### Claim 4 (depends on 3) The housing according to claim 3, wherein the light exit window carries a pattern of beam shaping elements for shaping a luminous output emanating from the elongate base region. ### Claim 5 (depends on 1) The housing according to claim 1, wherein the cavity in the opposing elongate sidewalls and the recess in the elongate base region are interconnected to form a single cavity that extends across the opposing sidewalls and the elongate base region. ### Claim 6 (depends on 1) The housing according to claim 1, wherein the recess comprises a first elongate surface portion adjoining a further elongate surface portion along the elongation direction of the elongate base region under a non-zero angle. ### Claim 7 (depends on 1) The housing according to claim 1, wherein the housing has a parabolic cross-section in a direction perpendicular to the elongation direction of the elongate base region. ### Claim 8 (depends on 1) The housing according to claim 1, further comprising a plurality of joins extending across the housing in a direction perpendicular to the elongation direction of the elongate base region. ### Claim 9 (depends on 1) A luminaire comprising the housing according to claim 1 and at least one light engine housed in the recess of the elongate base region. ### Claim 10 (depends on 9) The luminaire according to claim 9, wherein the at least one light engine comprises an elongate strip carrying a plurality of said light engines. ### Claim 11 (depends on 9) The luminaire according to claim 9, wherein the luminaire further comprising at least one of: a reflective foil extending into the cavity located within the opposing side walls; a thermally conductive member extending into the cavity located within the opposing side walls; and a diffuser foil in a double-skinned light exit window extending across the respective terminal ends of the opposing elongate sidewalls distal to the elongate base region. ### Claim 12 (depends on 9) The luminaire according to claim 9, wherein the luminaire comprises a plurality of said housings neighboring each other in a direction perpendicular to the respective elongation directions of said housings. ### Claim 13 (depends on 1) A method of manufacturing the housing according to claim 1, wherein the method comprises the steps of: providing a 3-D printing apparatus comprising an extruder nozzle having at least one filament feeder for feeding a preformed filament through the extruder nozzle; 3-D printing a plurality of abutting filaments with the 3-D printing apparatus, each of said printed filaments defining a portion of the housing including a section of the inner surface and the outer surface, said portion extending in a direction perpendicular to the elongation direction of the housing. ### Claim 14 (depends on 13) The method according to claim 13, wherein the extruder nozzle has a plurality of filament feeders, and wherein the step of 3-D printing comprises printing at least some of the abutting filaments in parallel.