Lighting strip and method for production

• US 6,074,074 A
• Filed: 07/10/1997
• Issued: 06/13/2000
• Est. Priority Date: 07/11/1996
• Status: Expired due to Fees

• Current Assignee: Happich Farhzeug-Und Industrieteile GmbH
• Original Assignee: Happich Farhzeug-Und Industrieteile GmbH
• Inventors: Marcus, Armin
• Primary Examiner(s): LEE, Y MY QUACH
• Application Number:
  US08/891,359
• Time in Patent Office: 1,069 Days
• Field of Search: 362/227, 362/234, 362/240, 362/244, 362/249, 362/250, 362/252, 362/800, 439/699.1, 439/56
• US Class Current: 362/240
• CPC Class Codes: B29C 45/14655 connected to or mounted on a carrier, e.g. lead frame
• CPC Class Codes: F21S 4/24 of ribbon or tape form, e.g. LED tapes
• CPC Class Codes: F21S 8/022 intended to be recessed in a floor or like ground surface, e.g. pavement or false floor
• CPC Class Codes: F21S 8/024 intended to be recessed in a wall or like vertical structure, e.g. building facade
• CPC Class Codes: F21V 23/06 the elements being coupling devices , e.g. connectors
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

A lighting strip is provided having a multicore conductor strip and LED elements which are arranged in a row one behind the other. The conductor strip is composed of a large number of conductor strip sections which are cut to length and are arranged in a row in the axial direction. A printed circuit board is in each case arranged between two axially adjacent conductor strip sections and is electrically conductively connected to them. Each printed circuit board is fitted with an LED element.

Claims

1. A lighting strip comprising a multicore conductor strip having a plurality of conductor strip sections of predetermined lengths arranged in an axial direction, a printed circuit board arranged between two axially adjacent conductor strip sections and electrically conductively connected to said conductor strip sections, and an LED element connected to said printed circuit board.

2. The lighting strip according to claim 1, wherein said conductor strip has at least one contact element, said conductor strip section further comprising

a plurality of individual wire cores sheathed with an insulation material, said insulation material removable from at least one end of said conductor strip section whereby each of said individual wire cores is electrically conductively connected to said printed circuit board by said at least one contact element.

3. The lighting strip according to claim 2, wherein said LED element has a light outlet side, and said at least one end of said conductor strip section, said contact element, said printed circuit board, and said LED element encapsulated in a colored plastic housing that leaves exposed only said light outlet side of said LED element.

4. The lighting strip according to claim 2, wherein said at least one end of said conductor strip section, said contact element, said printed circuit board, and said LED element are encapsulated in a plastic housing which is formed by direct overmoulding with a transparent plastic material.

5. The lighting strip according to claim 4, wherein said plastic housing has, on a light outlet side of said LED element, an integrally formed material attachment for fitting engagement in a cover over the lighting strip, said cover being provided with a retaining opening for said LED element.

6. The lighting strip according to claim 1, wherein the conductor strip comprises individual wires which each have insulation.

7. The lighting strip according to claim 1, wherein the conductor strip is a flexible ribbon cable.

8. The lighting strip according to claim 1, wherein the conductor strip is an extruded, relatively dimensionally stable, profiled strip having wires incorporated in it.

9. The lighting strip according to claim 8, wherein the profiled strip includes attachment means selected from clip-on mounting, stick-on mounting and combination thereof.

10. The lighting strip according to claim 9, further comprising a plastic housing having a substantially rectangular contour with tabs integrally formed thereon for clip-on mounting of the conductor strip in a retaining channel.

11. The lighting strip according to claim 1 wherein the conductor strip is arranged in a channel of a covering strip, said covering strip having holes arranged in an axial direction for said LED element to pass through, the conductor strip and the covering strip being arranged in a prefabricated flush-mounted unit for placing in a retaining channel in the lighting strip, and the flush-mounted unit being covered and being-held in position by a sealing profiled strip which engages the retaining channel in a positively-locking manner.

12. The lighting strip according to claim 1 wherein said lighting strip is incorporated into one of a handrail, a staircase, a baggage compartment, a skirting and an escape route marking strip.

13. The lighting strip according to claim 1 wherein said conductor strip comprises a plurality of individual wire cores being jacketed with an insulation material, said insulation material being removable from at least one end of each of said individual wire cores wherein each of said individual wire cores is electrically conductively connectable to a conductor track located on the printed circuit board.

14. In a lighting strip having a multicore conductor strip and axially aligned LED elements, the improvement comprising:

a conductor strip comprising a plurality of copper strips separated from one another by punched slots and cut-free sections, at least one LED element being mounted to one of said copper strips and being electrically connected to a resistor, said resistor also being electrically connected to one of said copper strips, and a flexible sheath profile surrounding said conductor strip and said LED elements, said flexible sheath profile being extrudable and being formable from a transparent plastic material.

15. In a lighting strip having a multicore conductor strip and axially aligned LED elements, the improvement comprising:

a conductor strip comprising a film strip having a plurality of copper strips coated onto it, at least one LED element being mounted to one of said copper strips, said at least one LED element being electrically connected to a resistor, said resistor also being electrically connected to one of said copper strips, and a flexible sheath profile surrounding said conductor strip and said LED elements, said flexible sheath profile being extrudable and being formable from a transparent plastic material.

16. A method of manufacturing a lighting strip having at least one LED element and an insulated multicore conductor strip, the method comprising the steps of:

cutting a conductor strip of finite length into at least one conductor strip section of predetermined length, connecting said at least one conductor strip section to at least one axially adjacent printed circuit board, and fitting said at least one printed circuit board with at least one LED element.

17. The method according to claim 16, wherein the steps of cutting at least one conductor strip section of predetermined length and connecting said at least one conductor strip section to at least one printed circuit board are carried out intermittently.

18. The method according to claim 16 further comprising the steps of:

(a) drawing said conductor strip of finite length off a supply roll and feeding said conductor strip to a cutting station;

(b) cutting said at least one conductor strip section of predetermined length from said conductor strip, and firmly holding said conductor strip section in a holding device;

(c) stripping insulation from an end of said conductor strip section and an end of said conductor strip;

(d) positioning said stripped end of said conductor strip section;

(e) providing a printed circuit board having conductor tracks and at least one LED element;

(f) connecting said stripped end of said conductor strip section and said conductor tracks of said printed circuit board to form an electrical connection therebetween;

(g) passing said conductor strip section which is connected via the printed circuit board to said conductor strip to a spool drum; and

,

(h) repeating steps (a) through (g) intermittently.

19. The method according to claim 18, wherein method steps (b), (c) and (d) are carried out simultaneously in the cutting station.

20. The method according to claim 18, wherein the LED element has a light outlet side, said method further comprising the step of overmoulding a plasticized colored plastic material over at least the printed circuit board with the light outlet side of the LED element being kept free of the plasticized colored plastic material.

21. The method according to claim 18, further comprising overmoulding a plasticized transparent plastic material over at least the printed circuit board.

22. The method according to claim 18, further comprising the steps of drawing a flexible covering strip from a supply roll, and connecting said flexible covering strip to the conductor strip.

23. The method according to claim 18, further comprising functionally testing the printed circuit board after it has been connected to the conductor strip section.

24. The method according to claim 18, further comprising the steps of drawing a flexible covering strip from a supply roll, and connecting said flexible covering strip to the at least one printed circuit board.