LED flashlight and printed circuit board therefor

• US 6,814,463 B2
• Filed: 02/14/2002
• Issued: 11/09/2004
• Est. Priority Date: 02/14/2002
• Status: Expired due to Fees

• Current Assignee: Tektite Industries Incorporated
• Original Assignee: Tektite Industries Incorporated
• Inventors: Mele, Scott A.
• Primary Examiner(s): O'Shea, Sandra
• Assistant Examiner(s): PAYNE, SHARON E
• Application Number:
  US10/075,776
• Publication Number:
  US 20030151915A1
• Time in Patent Office: 999 Days
• Field of Search: 362/184, 362/800, 362/227, 361/748, 361/760, 361/749, 361/750, 361/751, 361/736, 361/737, 361/784, 361/790, 361/795, 361/793, 361/792, 313/500, 174/251, 174/252, 174/253, 174/254, 174/255, 174/256, 174/257, 174/258, 174/259, 174/260
• US Class Current: 362/184
• CPC Class Codes: F21L 4/027 the light sources being a LED
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05K 1/18 Printed circuits structurally associated with non-printed electric components H05K1/0201, H05K1/023, H05K1/0243, and H05K1/16 take precedence
• CPC Class Codes: H05K 2201/09809 Coaxial layout reduction of cross-talk, noise or interference by printed shielding conductors for shielding around a single via or around a group of vias H05K1/0222
• CPC Class Codes: H05K 2201/10106 Light emitting diode [LED]
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

A printed circuit board (PCB) for mounting LEDs in an LED flashlight and a flashlight incorporating the PCB. The PCB includes a circuit board having first and second conductors. The first conductor includes a first section and at least a second section at least partially surrounding the first section. The second conductor includes a first section positioned between the first and second sections of the first conductor and, according to one embodiment, a second section at least partially surrounding the second section of the first conductor. The flashlight includes a housing for receiving a power source, the PCB, LEDs mounted on the PCB, and a switch for turning the flashlight on and off.

Claims

1. A PCB for use in a flashlight having a plurality of LEDs as a light source, said PCB comprising:

a circuit board comprising an insulating material and having a first surface and a second surface opposite said first surface;

a first conductor on said first surface of said circuit board having a first section and at least a second section surrounding a substantial portion of said first section; and

a second conductor on said first surface of said circuit board having a first section between said first and second sections of said first conductor, said second conductor being electrically isolated from said first conductor.

2. A PCB in accordance with claim 1, wherein said second section of said first conductor substantially completely surrounds said first section of said first conductor.

3. A PCB in accordance with claim 1, wherein said first and second sections of said first conductor and said first section of said second conductor are circular.

4. A PCB in accordance with claim 3, wherein said second conductor further comprises a second section at least partially surrounding said second section of said first conductor.

5. A PCB in accordance with claim 4, further comprising a plurality of holes extending through said circuit board and said first and second conductors for receiving terminals of the LEDs.

6. A PCB in accordance with claim 4, wherein said board is substantially circular.

7. A PCB in accordance with claim 6, wherein said first section of said first conductor is centrally positioned on said circular board and said second section of said second conductor extends in an annular path around the peripheral edge of said circular board.

8. A PCB in accordance with claim 7, further comprising a first set of holes through said first section of said first conductor and said circular board and through said first section of said second conductor and said circular board and a second set of holes through said second section of said first conductor and said circular board and through said second section of said second conductor and said circular board, said first set of holes positioned to receive the terminals of each LED of a first set of the plurality of LEDs for connection with a separate conductor and said second set of holes positioned to receive the terminals of each LED of a second set of the plurality of LEDs for connection with a separate conductor.

9. A PCB in accordance with claim 1, further comprising a third conductor on said first surface of said circuit board at least partially surrounding said first and second conductors, said third conductor being electrically isolated from said first and second conductors.

10. A PCB in accordance with claim 1 in combination with LEDs for use in an LED flashlight, comprising:

a plurality of LEDs, each of said plurality of LEDs having a pair of terminals, each terminal of said pair of terminals being electrically connected to a separate one of said first and second conductors.

11. A PCB with LEDs in accordance with claim 10, wherein said first and second sections of said first conductor and said first section of said second conductor are circular.

12. A PCB with LEDs in accordance with claim 11, wherein said second conductor further comprises a second section at least partially surrounding said second section of said first conductor.

13. A PCB with LEDs in accordance with claim 12, further comprising a plurality of holes extending through said circuit board and said first and second conductors for receiving terminals of said LEDs.

27. A PCB in accordance with claim 1, wherein said first section of said second conductor extends in a curved direction between said first and second sections of said first conductor.

14. An LED flashlight comprising:

a housing for receiving a power source;

a circuit board having a first surface and a second surface opposite said first surface;

a first conductor on said circuit board having a first section and at least a second section surrounding a substantial portion of said first section;

a second conductor on said circuit board having a first section between said first and second sections of said first conductor, said second conductor being electrically isolated from said first conductor; and

a plurality of LEDs for providing light, each of said plurality of LEDs having a pair of terminals, each terminal of said pair of terminals being electrically connected to a separate one of said first and second conductors, said LEDs being electrically connectable to said power source to illuminate said LEDs.

15. An LED flashlight in accordance with claim 14, further comprising:

a switch for electrically connecting and disconnecting said power source from said LEDs.

16. An LED flashlight in accordance with claim 14, wherein said first and second sections of said first conductor and said first section of said second conductor are circular.

17. An LED flashlight in accordance with claim 16, wherein said second conductor further comprises a second section at least partially surrounding said second section of said first conductor.

18. An LED flashlight in accordance with claim 14, wherein said first surface of said circuit board faces in the direction of said power source when said power source is received, said first and second conductors being positioned on said first surface of said circuit board, and said plurality of LEDs being positioned on said second surface of said circuit board facing away from said power source.

19. An LED flashlight in accordance with claim 18, wherein said plurality of LEDS are connected to said first and second conductors through a plurality of holes extending through said circuit board and said first and second conductors.

28. A PCB in accordance with claim 14, wherein said first section of said second conductor extends in a curved direction between said first and second sections of said first conductor.

20. A flashlight comprising:

a housing having a first end and a second end, said first end being closed and configured to receive at least one battery, said second end having a cap;

a circuit board having a first surface and a second surface opposite said first surface, said circuit board being positioned adjacent said second end of the housing, said first surface facing in a direction away from said cap;

a first conductor on said first surface of the circuit board having a first section and at least a second section at least partially surrounding said first section;

a second conductor on said first surface of the circuit board having a first section between said first and second sections of said first conductor and a second section at least partially surrounding said second section of said first conductor, said second conductor being electrically isolated from said first conductor;

a plurality of LEDs for producing light, each of said LEDs having a pair of terminals, said LEDs being positioned on said second surface of the circuit board with each of the terminals of each of said plurality of LEDs being electrically connected to a separate one of said first and second conductors, said LEDs being positioned adjacent said cap; and

a switch to electrically connect and disconnect at least one of said first and second conductors from the battery, when said battery is received, to turn the flashlight on and off.

21. The flashlight of claim 20, further comprising a conductor strip of a conductive metal mounted on and extending longitudinally along the housing between the first end of the housing and the circuit board, said conductor strip being engagable at one end by a terminal of the battery and being engagable at the other end by one of said first and second conductors on the circuit board.

22. The flashlight of claim 21, further comprising a cylindrical spacer ring positioned within the housing between the circuit board and the second end of the housing and extending around said plurality of LEDs, said spacer ring being engagable by said cap to be capable of pushing the spacer ring against said circuit board so as to move said circuit board to bring said second section of said second conductor towards the conductor strip.

23. A PCB for use in a flashlight having a plurality of LEDs as a light source, comprising:

a circuit board having an insulating material and a first surface and a second surface opposite said first surface;

a first conductor on said first surface of said circuit board, said first conductor having a central section and a semicircular second section at least partially surrounding and spaced from said central section and electrically connected thereto, said second section further comprising a gap;

a second conductor on said first surface at least partially surrounding said second section of said first conductor and electrically isolated therefrom, said second conductor having a member extending into said gap towards said first section of said first conductor; and

a third conductor on said first surface of said circuit board at least partially surrounding said first and second conductors, said third conductor being electrically isolated from said first and second conductors.

24. A PCB for use in a flashlight having a plurality of LEDs as a light source, said PCB comprising:

a circuit board comprising an insulating material and having a first surface and a second surface opposite said first surface;

a first conductor on said first surface of said circuit board;

a second conductor on said first surface of said circuit board at least partially surrounding said first conductor, said second conductor being electrically isolated from said first conductor; and

a third conductor on said first surface of said circuit board at least partially surrounding said first and second conductors, said third conductor being electrically isolated from said first and second conductors;

wherein said second and third conductors are configured to receive a resistor, said resistor coupled on a first end to the second conductor and on a second end to the third conductor.

25. A PCB for use in a flashlight having a plurality of LEDs as a light source, said PCB comprising:

a circuit board comprising an insulating material and having a first surface and a second surface opposite said first surface;

a first conductor on said first surface of said circuit board having a first section and at least a second section substantially completely surrounding said first section; and

a second conductor on said first surface of said circuit board having a first section between said first and second sections of said first conductor, said second conductor being electrically isolated from said first conductor.

26. A PCB for use in a flashlight having a plurality of LEDs as a light source, said PCB comprising:

a circuit board comprising an insulating material and having a first surface and a second surface opposite said first surface;

a first conductor on said first surface of said circuit board having a first section and at least a second section at least partially surrounding said first section; and

a second conductor on said first surface of said circuit board having a first section between said first and second sections of said first conductor, said second conductor being electrically isolated from said first conductor; and

said first and second sections of said first conductor and said first section of said second conductor are circular.