# US 12,109,939 B2 · Light engine assembly for automotive interior > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,109,939 B2 - Document ID: US12109939B2 - Status: Granted - Kind: B2 - Application number: 17/228,355 - Filed: 2021-04-12 - Published: 2022-10-13 - Granted: 2024-10-08 - Earliest claimed: 2021-04-12 - Assignees: Ford Global Technologies, LLC - Applicants: Ford Global Technologies, LLC - Inventors: Patrick McDonald - Web page: https://patentgrep.com/patent/US12109939B2 ## CPC - B60Q 3/14: lighting through the surface to be illuminated - B60Q 3/51: for mounting lighting devices onto vehicle interior, e.g. onto ceiling or floor - B29C 45/1676: {using a soft material and a rigid material, e.g. making articles with a sealing part} - B60Q 3/78: for generating luminous strips, e.g. for marking trim component edges - B60R 13/02: {Internal} Trim mouldings {; Internal} Ledges; Wall liners {for passenger compartments}; Roof liners (B60R13/01 takes precedence {; padded linings for the vehicle interior B60R21/04; arrangements or adaptations of floor mats or carpets in vehicles B60N3/04; internal lining for trains B61D17/18}) - B60R 13/0256: {Dashboard liners} - F21V 3/10: characterised by coatings - F21V 15/015: Devices for covering joints between adjacent lighting devices; End coverings - F21V 31/005: {Sealing arrangements therefor} - B29K 2995/0025: Opaque - B29K 2995/0026: Transparent - B29K 2995/0029: Translucent - B29L 2031/3008: {Instrument panels} - B60R 2013/0287: {integrating other functions or accessories} - B60Q: ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, 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 - B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS - B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES ## Abstract A method for forming a light engine assembly includes the steps of injecting a light trough material into a mold, thereby forming a light trough including a trough body having an edge, and injecting a seal material into the mold, thereby forming a seal configured to bond with the edge of the trough body. The method further includes cooling one of the light trough material and the seal material to adhere the light trough material to the seal material, thereby forming a unitary light trough part, ejecting the light trough part, and coupling a lighting unit with the light trough part. ## Claims ### Claim 1 A method for forming a light engine assembly for a vehicle trim panel, comprising the steps of: injecting a light trough material into a trough mold, thereby forming a light trough including a trough body having first and second longitudinal edges; injecting a seal material into the trough mold, thereby forming first and second seals configured to couple the first and second longitudinal edges of the trough body, respectively, wherein the seal material is different from and compatible with the light trough material; cooling one of the light trough material and the seal material to form a bond between the light trough material and the seal material, thereby forming a unitary light trough part; ejecting the light trough part; coupling a lighting unit with the light trough part; and assembling the light engine assembly on the vehicle trim panel. ### Claim 2 (depends on 1) The method of claim 1, further comprising the steps of: injecting an end cap material into an end cap mold, thereby forming an end cap configured to couple an end of the trough body; injecting a seal material into the end cap mold, thereby forming an end seal configured to couple the first and second seals of the light trough part, wherein the seal material is different from and compatible with the end cap material; cooling one of the end cap material and the seal material to form a bond between the end cap material and the seal material, thereby forming a unitary end cap part; ejecting the end cap part; and coupling the end cap part with the light trough part. ### Claim 3 (depends on 2) The method of claim 2, wherein the step of coupling the end cap part with the light trough part further comprises: coupling a first end cap part with a first end of the light trough part; and coupling a second end cap part with a second end of the light trough part. ### Claim 4 (depends on 1) The method of claim 1, wherein the step of injecting the light trough material into the trough mold further comprises: forming at least one heat stake projecting from a B-side of the trough body. ### Claim 5 (depends on 1) The method of claim 1, wherein the light trough material comprises a plastic and the seal material comprises an elastomer. ### Claim 6 (depends on 1) The method of claim 1, wherein the first and second seals prevent light from the lighting unit from leaking to an exterior side of the light trough when the first and second seals are directly coupled with a lens. ### Claim 7 (depends on 1) The method of claim 1, wherein the vehicle trim panel is coupled with an instrument panel. ### Claim 8 A method for forming a light engine assembly, comprising the steps of: injecting a light trough material into a mold, thereby forming a light trough including a trough body having a perimeter defining an edge; injecting a seal material into the mold, thereby forming a seal configured to bond with the edge of the trough body; cooling one of the light trough material and the seal material to adhere the light trough material to the seal material, thereby forming a unitary light trough part; ejecting the light trough part; and coupling a lighting unit with the light trough part. ### Claim 9 (depends on 8) The method of claim 8, wherein the step of injecting the light trough material into the mold further comprises: forming at least one heat stake projecting from a B-side of the trough body. ### Claim 10 (depends on 8) The method of claim 8, wherein the light trough material comprises a plastic and the seal material comprises an elastomer. ### Claim 11 (depends on 8) The method of claim 8, wherein the seal prevents light from the lighting unit from leaking to an exterior side of the light trough when the seal is directly coupled with a lens. ### Claim 12 (depends on 8) The method of claim 8, further comprising the steps of: coupling the light engine assembly with a lens and a backplate, thereby forming a light bar; and coupling the light bar with a vehicle trim panel. ### Claim 13 A vehicle trim panel, comprising: a lighting assembly, comprising: a lens having a body defining a lens A-side that faces a vehicle cabin and a lens B-side; a light engine comprising: a light trough including a trough body defining a perimeter and made from a light trough material; a seal bonded to the perimeter and made from a seal material, wherein a seal material is different from and compatible with a light trough material; and a lighting unit disposed within the trough body and configured to emit light; and a backplate, wherein the light engine is disposed between the lens B-side and the backplate and the seal is disposed between the lens B-side and the perimeter of the light trough to prevent emitted light from the lighting unit from leaking to an exterior side of the light trough. ### Claim 14 (depends on 13) The vehicle trim panel of claim 13, wherein the vehicle trim panel is coupled with an instrument panel. ### Claim 15 (depends on 13) The vehicle trim panel of claim 13, further comprising: an applique disposed on the lens including a pattern having optically transparent portions, wherein emitted light from the lighting unit is transmitted through the transparent portions. ### Claim 16 (depends on 13) The vehicle trim panel of claim 13, wherein the light engine further comprises: a first end cap defining a first end cap body and having a first end seal coupled with a first end of the light trough; and a second end cap defining a second end cap body having a second end seal coupled with a second end of the light trough, wherein the first and second end seals are bonded to the first and second end cap bodies, respectively. ### Claim 17 (depends on 16) The vehicle trim panel of claim 16, wherein the seal bonded to the perimeter of the light trough further comprises: an upper seal; and a lower seal, wherein the first and second end seals align with the upper seal and the lower seal, thereby forming a continuous perimeter. ### Claim 18 (depends on 13) The vehicle trim panel of claim 13, wherein the seal material and light trough material are bonded at the perimeter of the trough body, thereby forming a unitary part. ### Claim 19 (depends on 13) The vehicle trim panel of claim 13, wherein the light engine seal directly contacts the lens B-side. ### Claim 20 (depends on 13) The vehicle trim panel of claim 13, wherein the light engine further comprises: a light rail disposed between the light engine and the lens B-side, wherein the light engine seal directly contacts the light rail.