Electrical device having boardless electrical component mounting arrangement

• US 7,909,482 B2
• Filed: 08/21/2007
• Issued: 03/22/2011
• Est. Priority Date: 08/21/2006
• Status: Active Grant

• Current Assignee: Innotec, Corp.
• Original Assignee: Innotec, Corp.
• Inventors: Weeda, Matthew S., Israels, Kyle A., Mulder, Jason R., Vander Kuyl, Paul T., Lanser, Michael L., Veenstra, Thomas J., Vander Pol, Mark W.
• Primary Examiner(s): Sember; Thomas M
• Application Number:
  US11/842,606
• Publication Number:
  US 20080062711A1
• Time in Patent Office: 1,309 Days
• Field of Search: 362/267, 362/310, 362/249.01, 362/249.02, 362/249.05, 362/487, 362/488, 362/489, 362/545, 362/238, 362/800, 257/88, 257/89, 257/99, 257/100, 257/678, 257/687, 257/787, 174/521, 174527-529, 445/1, 438/26, 438/106, 438/123, 438/127
• US Class Current: 362/249.05
• CPC Class Codes: B29C 45/14639 for obtaining an insulating effect, e.g. for electrical components
• CPC Class Codes: B29C 45/1671 with an insert
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21V 31/04 Provision of filling media
• CPC Class Codes: F21W 2106/00 Interior vehicle lighting devices
• CPC Class Codes: H01L 33/54 having a particular shape
• CPC Class Codes: H05K 1/187 the patterned circuits being prefabricated circuits, which are not yet attached to a permanent insulating substrate, e.g. on a temporary carrier
• CPC Class Codes: H05K 2201/09118 Moulded substrate
• CPC Class Codes: H05K 2201/10106 Light emitting diode [LED]
• CPC Class Codes: H05K 2203/1316 Moulded encapsulation of mounted components
• CPC Class Codes: H05K 2203/1476 Same or similar kind of process performed in phases, e.g. coarse patterning followed by fine patterning
• CPC Class Codes: H05K 3/202 using self-supporting metal foil pattern
• CPC Class Codes: Y10T 29/49146 with encapsulating, e.g., potting, etc.

Abstract

An electrical device such as an LED light assembly includes a conductive circuit and one or more electrical components connected to the circuit. The electrical components and the circuit are at least partially overmolded with a thermoplastic polymer material to encapsulate the components. The material utilized to cover the circuit and/or electrical components may also be utilized to form a housing or other structure of a finished part.

Claims

1. A light assembly, comprising:

a sheet metal circuit including at least two electrically conductive circuit elements, each circuit element defining opposite side surfaces;

at least one LED electrically connected to the circuit elements;

at least one electrical component electrically connected to the circuit elements, wherein the one electrical component is selected from the group consisting of a resistor, a diode, a zener diode, a transistor, an integrated circuit, a capacitor, an inductor, a transient voltage suppressor, and a metal oxide varister; and

wherein the electrical component is capable of affecting at least one of the voltage and electrical current supplied to the LED;

a one-piece body comprising thermoplastic polymer material encasing the LED, the one electrical component, and at least a portion of the opposite side surfaces of the circuit elements;

the metal circuit includes at least two cantilevered prongs formed integrally with the electrically conductive circuit elements, the prongs having exposed metal protruding from the thermoplastic polymer material forming the one-piece body, and wherein the thermoplastic polymer material forming the one-piece body includes a cavity having an open end to thereby form a receptacle around the exposed metal of the prongs.

2. A light assembly, comprising:

a sheet metal circuit including at least two electrically conductive circuit elements, each circuit element defining opposite side surfaces;

at least one LED electrically connected to the circuit elements;

at least one electrical component electrically connected to the circuit elements, wherein the one electrical component is selected from the group consisting of a resistor, a diode, a zener diode, a transistor, an integrated circuit, a capacitor, an inductor, a transient voltage suppressor, and a metal oxide varister; and

wherein the electrical component is capable of affecting at least one of the voltage and electrical current supplied to the LED;

a one-piece body comprising thermoplastic polymer material encasing the LED, the one electrical component, and at least a portion of the opposite side surfaces of the circuit elements; and

wherein;

the polymer material forms a mounting flange having at least one opening therethrough configured to receive a fastener to mount the light assembly.

3. The light assembly of claim 2, wherein:

the light assembly comprises an exterior light for a motor vehicle, and wherein the electrical component forms a driver circuit capable of supplying a desired electrical current to the LED when the light assembly is connected to a vehicle 12 volt D.C. power source.

4. The light assembly of claim 2, wherein:

the polymer material comprises a translucent material.

5. The light assembly of claim 4, wherein:

the polymer material is red.

6. The light assembly of claim 4, wherein:

the polymer material is amber.

7. The light assembly of claim 4, wherein:

the polymer material is substantially clear.

8. The light assembly of claim 2, wherein:

all portions of the polymer material have substantially the same composition and color.

9. The light assembly of claim 2, wherein:

the LED comprises a white LED.

10. The light assembly of claim 2, wherein:

the LED comprises a colored LED.

11. The light assembly of claim 2, wherein:

the circuit elements include a planar primary portion, and wherein the LED and the electrical component are mounted to the primary portion;

the circuit elements including an intermediate portion extending transversely from the primary portion, and an end portion extending transversely from the intermediate portion, the circuit elements further including cantilevered prongs extending from the end portion, and wherein the primary, intermediate, and end portions are encapsulated by the polymer material, and the prongs are exposed.

12. The light assembly of claim 11, wherein:

the polymer material forms a receptacle around the prongs.

13. A light assembly, comprising:

a metal circuit including at least two electrically conductive circuit elements including opposite side surfaces and opposite edge surfaces extending between the opposite side surfaces and wherein the opposite edge surfaces are spaced-apart to define a plurality of gaps between the opposite edge surfaces;

at least one LED electrically connected to the circuit elements and spanning a first one of the gaps;

at least one electrical component electrically connected to the circuit elements and spanning a second gap, wherein the electrical component is capable of affecting at least one of the voltage and electrical current supplied to the LED; and

a one-piece body comprising thermoplastic polymer material encasing the LED and the one electrical component, wherein the thermoplastic polymer material of the one-piece body is in contact with portions of both of the opposite side surfaces of each circuit element.

14. The light assembly of claim 13, wherein:

the thermoplastic polymer material contacts at least a portion of each of the opposite edge surfaces.

15. The light assembly of claim 13, wherein:

the electrically conductive circuit elements have a substantially uniform thickness, and wherein the electrically conductive circuit elements define a generally planar first portion adjacent the first gap, and wherein the electrically conductive circuit elements define a second portion that extends transverse relative to the first portion.

16. The light assembly of claim 13, wherein:

the light assembly comprises an exterior light for a motor vehicle, and wherein the electrical component forms a driver circuit capable of supplying a desired electrical current to the LED when the light assembly is connected to a vehicle 12 volt D.C. power source.

17. A light assembly, comprising:

a circuit including at least two electrically conductive circuit elements defining an outer peripheral edge portion and a central portion, wherein the electrically conductive circuit elements are spaced apart to define at least one gap in the central portion of the circuit, each circuit element defining first and second opposite side surfaces;

at least one LED electrically connected to the circuit elements;

at least one electrical component electrically connected to the circuit elements, wherein the one electrical component is capable of affecting at least one of the voltage and electrical current supplied to the LED;

a one-piece body comprising thermoplastic polymer material encasing the LED, the one electrical component, and at least a portion of the opposite side surfaces of the circuit elements, the one-piece body including a first portion covering at least a portion of the first opposite side surfaces of the circuit elements, and a second portion covering at least a portion of the second opposite side surfaces of the circuit elements, and wherein the first and second portions of the one-piece body are interconnected by thermoplastic polymer material extending through the one gap in the central portion of the circuit.

18. The light assembly of claim 17, wherein:

the electrically conductive circuit elements have a substantially uniform thickness in the range of 0.010-0.020 inches.

19. A light assembly, comprising:

a metal circuit including at least two electrically conductive circuit elements, at least a portion of the two circuit elements defining metal upper and lower opposite side surfaces that are spaced-apart a first distance, and edge surfaces extending transversely between the upper and lower opposite side surfaces a second distance that is substantially less than the first distance;

at least one LED electrically connected to the circuit elements;

at least one electrical component electrically connected to the circuit elements, wherein the one electrical component is selected from the group consisting of a resistor, a diode, a zener diode, a transistor, an integrated circuit, a capacitor, an inductor, a transient voltage suppressor, and a metal oxide varister; and

wherein the electrical component is capable of affecting at least one of the voltage and electrical current supplied to the LED;

a one-piece body comprising thermoplastic polymer material encasing the LED, the one electrical component, and at least a portion of the opposite side surfaces of the circuit elements, and wherein at least some of the thermoplastic polymer material of the one-piece body contacts the upper and lower metal opposite side surfaces of the circuit elements.

20. The light assembly of claim 19, wherein:

the two electrically conductive circuit elements comprise sheet metal having substantially uniform thickness.

21. The light assembly of claim 19, wherein:

the thermoplastic polymer material of the one-piece body contacts at least a portion of each of the upper and lower opposite side surfaces and each of the edge surfaces.

22. The light assembly of claim 21, wherein:

portions of the edge surfaces of the two circuit elements are spaced-apart to form a gap, and the thermoplastic polymer material extends through the gap and interconnects thermoplastic polymer material that is disposed directly adjacent the upper and lower opposite side surfaces.

23. The light assembly of claim 22, wherein:

the LED extends across the gap and defines a lower side surface that faces the gap, and wherein the thermoplastic polymer material contacts the lower side surface of the LED.

24. The light assembly of claim 19, wherein:

the one-piece body includes at least one surface feature selected from the group consisting of an outwardly protruding ridge, a dome-like protrusion, and a recessed area forming an outwardly facing cavity.

25. The light assembly of claim 19, wherein:

the one-piece body defines opposite side faces, and a peripheral edge portion extending between the opposite side faces and the entire periphery of the one-piece body.

26. The light assembly of claim 25, wherein:

the one-piece body is generally disk-shaped with a circular periphery.

27. The light assembly of claim 25, wherein:

the electrically conductive circuit elements are spaced inwardly from the entire periphery of the one-piece body.

28. The light assembly of claim 27, wherein:

the electrically conductive circuit elements include a generally planar central portion and a pair of cantilevered prongs extending outside the one-piece body in a direction that is transverse relative to the generally planar central portion.

29. The light assembly of claim 19, wherein:

the one-piece body includes first and second thin planar web portions that extend transversely relative to one another.

30. The light assembly of claim 29, wherein:

the one-piece body includes a third planar web portion that is parallel to the first planar web portion, and wherein the second planar web portion extends transversely between the first and third planar web portions.

31. The light assembly of claim 30, wherein:

the electrically conductive circuit elements are disposed within the first, second, and third planar web portions.

32. The light assembly of claim 19, wherein:

the one-piece body includes surface portions that are nonlinear in first and second cross sections defined by first and second orthogonal planes.

33. The light assembly of claim 32, wherein:

the surface portions form a dome-like protrusion.

34. A light assembly, comprising:

a sheet metal circuit including at least two electrically conductive circuit elements, each circuit element defining opposite side surfaces;

a plurality of LEDs electrically connected to the circuit elements;

at least one electrical component electrically connected to the circuit elements, wherein the one electrical component is selected from the group consisting of a resistor, a diode, a zener diode, a transistor, an integrated circuit, a capacitor, an inductor, a transient voltage suppressor, and a metal oxide varister; and

wherein the electrical component is capable of affecting at least one of the voltage and electrical current supplied to the LEDs;

a one-piece body comprising thermoplastic polymer material encasing the LEDs, the one electrical component, and at least a portion of the opposite side surfaces of the circuit elements; and

wherein;

the thermoplastic polymer material forming the one-piece body includes raised outer surface portions forming a plurality of discrete protrusions over at least some of the LEDs.

35. The light assembly of claim 34, wherein:

the electrical component forms an LED driver circuit capable of providing the LED with a desired electrical current when the light assembly is connected to a 120 volt A.C. power source.

36. The light assembly of claim 34, wherein:

the polymer material forms a raised ridge having convex and concave curved opposite surfaces.