Integration of light emitting devices and printed electronics into vehicle trim components

• US 7,862,220 B2
• Filed: 03/10/2009
• Issued: 01/04/2011
• Est. Priority Date: 03/10/2009
• Status: Active Grant

• Current Assignee: International Automotive Components Group North America (Lear Corporation)
• Original Assignee: International Automotive Components Group North America (Lear Corporation)
• Inventors: Hierl, Oliver, Cannon, Carter Scott
• Primary Examiner(s): O Shea; Sandra L
• Assistant Examiner(s): ALLEN, DANIELLE NICOLE
• Application Number:
  US12/401,603
• Publication Number:
  US 20100232171A1
• Time in Patent Office: 665 Days
• Field of Search: 362/511, 362/812, 362/605, 362/84, 362/603, 362/604, 405/41
• US Class Current: 362/605
• CPC Class Codes: B29C 2045/14237 the inserts being deformed or preformed outside the mould or mould cavity
• CPC Class Codes: B29C 2045/14745 in-line printing
• CPC Class Codes: B29C 2795/002 before shaping
• CPC Class Codes: B29C 45/1418 the inserts being deformed or preformed, e.g. by the injection pressure
• CPC Class Codes: B29C 45/14688 Coating articles provided with a decoration
• CPC Class Codes: B29C 45/14811 Multilayered articles B29C45/14827 takes precedence
• CPC Class Codes: B29L 2031/3005 Body finishings
• CPC Class Codes: B60Q 2500/30 Arrangements for illuminating different zones in the vehicle, e.g. front/rear, different seats
• CPC Class Codes: B60Q 3/54 Lighting devices embedded in interior trim, e.g. in roof liners
• CPC Class Codes: B60Q 3/74 for overall compartment lighting; for overall compartment lighting in combination with specific lighting, e.g. room lamps with reading lamps general lighting mounted on specific fittings B60Q3/20; general lighting for mass transit vehicles B60Q3/43
• CPC Class Codes: Y10S 362/80 Light emitting diode
• CPC Class Codes: Y10S 362/812 Signs

Abstract

A relatively thin printed LED backlight device with an integral diffuser may be integrated into an interior trim component using a molding process, such as injection molding, compression molding and reaction injection molding. The display portion may be placed behind a textile surface or molded grille or may form a portion of the outer surface of the trim component to provide light to low light areas of the vehicle. Electronic circuitry and components may be printed on to the substrate of the device as part of an in-line continuous process at the molding station to allow low inventory and customization of each backlight device.

Claims

1. A trim component capable of providing light for the interior of a vehicle, said trim component further including a surface, comprising:

a device having a surface that emits light, wherein said device has a thickness of 0.5 mm to 3.0 mm, including at least two adjacent surfaces, wherein said device surface that emits light comprises a portion of said surface of said trim component;

said two adjacent surfaces of said device being partially embedded in molded plastic;

wherein said molded plastic comprises attachment structure for attaching said trim component in said vehicle;

wherein said device includes a light source and electronics printed on a light substrate.

2. The trim component of claim 1 wherein said device is one of a backlight device or a lightguide device.

3. The trim component of claim 2 wherein said backlight device includes a light source and electronics printed on a light transmissive substrate.

4. The trim component of claim 3 wherein said light source is an LED.

5. The trim component of claim 2 wherein said lightguide is optically coupled to a light source and further includes electronics printed on a light transmissive substrate.

6. The trim component of claim 1 wherein said surface of said device is covered by one of a molded plastic grille, a layer of textile, a transparent decorative part, a layer of foam-backed textile or a perforated material including a pattern of holes.

7. The trim component of claim 2 wherein said lightguide device comprises a light transmissive layer positioned between two outer opaque layers.

8. The trim component of claim 5 wherein said printed electronics include at least one of circuitry, a resistor, an inductor, a capacitor, a transistor, a switch or a sensor.

9. A method for producing a trim component capable of providing light for the interior of a vehicle, comprising:

providing a device having a surface that emits light wherein said device has a thickness of 0.5 mm to 3.0 mm, including at least two adjacent surfaces;

forming said device to shape, wherein said shape complements a surface of a mold for forming said interior trim component;

placing said formed device against said surface in said mold; and

introducing a flowable plastic behind at least a portion of said device in said mold wherein said two adjacent surfaces of said device are partially embedded in said flowable plastic and wherein said flowable plastic forms attachment structure for said interior trim component in said vehicle, wherein said device includes a light source and electronics deposited on a light substrate.

10. The method of claim 9 wherein said device is one of a backlight device or a lightguide device.

11. The method of claim 10 wherein said backlight device includes a light source and electronics printed on a light transmissive substrate.

12. The method of claim 11 wherein said light source is an LED.

13. The method of claim 10 wherein said lightguide device is optically coupled to a light source and further includes electronics printed on a light transmissive substrate.

14. The method of claim 13 wherein said electronics include at least one of circuitry, a resistor, an inductor, a capacitor, a transistor, a switch or a sensor and are deposited by printing.

15. The method of claim 10 wherein said lightguide device comprises a light transmissive layer positioned between two outer opaque layers.

16. The method of claim 9 wherein said introducing a flowable plastic comprises one of low pressure injection molding, injection-compression molding or reaction injection molding including a clamp pressure, wherein said clamp pressure is less than about 2000 psi.

17. The method of claim 9 wherein said introducing a flowable plastic comprises compression molding or transfer molding including a clamp pressure, wherein said clamp pressure is less than about 1000 psi.

18. A method for producing a trim component capable of providing light for the interior of a vehicle, comprising:

providing a device having a surface that emits light wherein said device has a thickness of 0.5 mm to 3.0 mm, including at least two adjacent surfaces;

placing said device in a mold for forming said interior trim component; and

introducing a flowable plastic behind at least a portion of said formed device in said mold wherein said two adjacent surfaces of said device are partially embedded in said flowable plastic and wherein said flowable plastic forms attachment structure for said interior trim component in said vehicle, wherein said device includes a light source and electronics deposited on a light substrate.

19. The method of claim 18 wherein said device is one of a backlight device or a lightguide device.

20. A method for the in-line production of a trim component capable of providing light for the interior of a vehicle, comprising:

providing an inkjet printer adjacent to a plastic molding press;

providing a sheet of plastic to said printer;

advancing said sheet through said printer whereby droplets of ink are deposited from one or more printheads in said printer onto a surface of said sheet, said droplets deposited in such a pattern so as to create a printed electronic, optical and/or lighting device;

drying said ink droplets;

expelling said sheet from said printer,

providing a top layer attached to said printed sheet;

trimming said combination of top layer and sheet to provide said printed electronic, optical and/or lighting device having a thickness of 0.5 to 3.0 mm wherein said device includes two adjacent surfaces;

directly forming said printed electronic, optical and/or lighting device to shape wherein said shape complements a surface of a mold for forming said interior trim component;

placing said device against said surface in said mold; and

introducing a flowable plastic behind at least a portion of said formed device in said mold wherein said two adjacent surfaces of said device are partially embedded in said flowable plastic and wherein said flowable plastic forms attachment structure for said interior trim component in said vehicle, wherein said device includes a light source and electronics deposited on a light substrate.

21. The method of claim 20 wherein said device is one of a backlight device or a lightguide device.

22. The method of claim 21 wherein said lightguide device comprises a light transmissive layer positioned between two outer opaque layers.

23. The method of claim 20 wherein said sheet of plastic comprises polycarbonate, polyimide, polyethylene terephthalate or polyethylene naphthalate.

24. The method of claim 20 wherein said forming to shape of said device comprises vacuum forming or compression forming.

25. The method of claim 20 wherein said in-line production comprises a one-for-one manufacture of said printed electronic, optical and/or lighting device through said printer, forming of said device to shape and molding said device into an interior trim component.

26. The method of claim 20 wherein said light source is an LED.

27. The method of claim 20 wherein said electronics includes at least one of circuitry, a resistor, an inductor, a capacitor, a transistor, a switch or a sensor printed on said substrate.

28. The method of claim 20 wherein said introducing a flowable plastic comprises one of low pressure injection molding, injection-compression molding or reaction injection molding including a clamp pressure, wherein said clamp pressure is less than about 2000 psi.

29. The method of claim 20 wherein said introducing a flowable plastic comprises one of compression molding or transfer molding including a clamp pressure, wherein said clamp pressure is less than about 1000 psi.

30. A method for the in-line production of a trim component capable of providing light for the interior of a vehicle, comprising:

providing an inkjet printer adjacent to a plastic molding press;

providing a sheet of plastic to said printer;

advancing said sheet through said printer whereby droplets of ink are deposited from one or more printheads in said printer onto a surface of said sheet, said droplets deposited in such a pattern so as to create a printed electronic, optical and/or lighting device;

drying said ink droplets;

expelling said sheet from said printer,

trimming said sheet to provide said printed electronic, optical and/or lighting device having a thickness of 0.5 to 3.0 mm along with two adjacent surfaces;

placing said device in a mold for forming said interior trim component; and

introducing a flowable plastic behind at least a portion of said device in said mold wherein said two adjacent surfaces of said device are partially embedded in said flowable plastic and wherein said flowable plastic forms attachment structure for said interior trim component in said vehicle, wherein said device includes a light source and electronics deposited on a light substrate.

31. The method of claim 30 wherein said device is one of a backlight device or a lightguide device.