Large scale LED display

• US 8,648,774 B2
• Filed: 11/19/2008
• Issued: 02/11/2014
• Est. Priority Date: 12/11/2007
• Status: Expired due to Fees

• Current Assignee: Advance Display Technologies Incorporated
• Original Assignee: Advance Display Technologies Incorporated
• Inventors: Kline, Daniel S., Shankle, Matthew W., Cox, David F., Lee, James C., Sarcia, Sam R.
• Primary Examiner(s): Lefkowitz, Sumati
• Assistant Examiner(s): HERNANDEZ, JESUS J
• Application Number:
  US12/273,884
• Publication Number:
  US 20090146919A1
• Time in Patent Office: 1,910 Days
• Field of Search: None
• US Class Current: 345/46
• CPC Class Codes: G09F 9/3026 Video wall, i.e. stackable semiconductor matrix display modules video wall control systems G06F3/1446, G09G2300/026
• CPC Class Codes: G09F 9/33 being semiconductor devices, e.g. diodes
• CPC Class Codes: G09G 2360/04 Display device controller operating with a plurality of display units
• CPC Class Codes: G09G 3/32 semiconductive, e.g. using light-emitting diodes [LED]

Abstract

A large scale LED display has a number of display panels each having a cable and spacer support structure for a number of LED modules. Adjacent display panels are connected together by a number of seam links that snap onto one cable of one of the display panels and one cable of the adjacent display panel. The cables may include a number of seam link engagement members spaced along the length of the cable and onto which the seam links snap wherein each of the seam link engagement members locates an LED module on the support structure. The LED modules include top and bottom housing sections that snap together, wherein one of the housing sections includes a seat for an electrical connector. The seat locates the connector and a printed circuit assembly within the LED module.

Claims

1. An LED module, comprising:

a circuit assembly having a plurality of LEDs mounted thereon;

an electrical connector for connecting a first cable carrying power and/or control signals to the circuit assembly;

a first module housing section having a seat for locating the electrical connector within the LED module wherein the first cable passes through the LED module, wherein the first module housing section is structured to provide openings through which the first cable passes, wherein the first cable provides data and power from a first master LED module of a first segment to the LED module, wherein the LED module is a slave LED module of the first segment, wherein the first module housing section is further structured to provide a channel through which a second cable passes, wherein the second cable is aligned in a direction of the first cable, wherein the second cable provides a direct electrical connection between the first master LED module of the first segment and the second master LED module of the second segment, wherein the second cable provides for direct communication between the first master LED module of the first segment and the second master LED module of the second segment;

a second module housing section having apertures through which the LEDs extend, the second housing section snapping onto the first housing section; and

a potting material encapsulating the circuit assembly and electrical connector within the LED module.

2. An LED module as recited in claim 1, wherein the electrical connector has solderless pins in electrical contact with the circuit assembly, wherein the circuit assembly includes a circuit board on which the plurality of LEDs are mounted, wherein the electrical connector sits inside a cavity of the seat, the cavity being defined by walls of the seat that extend upwardly from a base of the seat, wherein the circuit board rests on an upper surface of the walls of the seat, and wherein the first cable passes through the cavity of the seat.

3. The LED module according to claim 2, wherein the circuit assembly includes a circuit board with apertures through which the solderless pins extend wherein the circuit board rests on an upper surface of the seat for the connector.

4. The LED module according to claim 1, wherein the seat for the connector has a plurality of spaced walls and the circuit assembly includes a circuit board that rests on an upper surface of the walls.

5. The LED module according to claim 4, wherein the periphery of the seat defined by the spaced walls is less than the periphery of the circuit board.

6. The LED module according to claim 4, wherein the spaced walls are corner walls.

7. The LED module according to claim 6, wherein the seat includes four corner walls.

8. The LED module according to claim 4, wherein the electrical connector has a body from which electrical pins extend to electrically connect the first cable to the circuit assembly and wherein the walls of the seat extend at least slightly above the body of the connector.

9. The LED module according to claim 8, wherein the electrical pins are solderless pins.

10. The LED module according to claim 1, wherein the first cable is a ribbon cable and the seat has a pair of apertures therein for locating a portion of the ribbon cable within the LED module, and wherein the first module housing section includes a pair of arms extending underneath the ribbon cable to provide strain relief.

11. The LED module according to claim 10, wherein the first segment and the second segment are disposed end to end so that the first master LED module of the first segment is not adjacent to the second LED module of the second segment, but is in direct communication with the second LED module.

12. The LED module according to claim 1, wherein the second housing section includes a conically shaped seal around each aperture through which the LEDs extend.

13. The LED module according to claim 12, wherein the conically shaped seal is an integral part of the second housing section.

14. The LED module according to claim 1, wherein the second housing section includes a plurality of members extending downwardly from the interior of the second housing section, the members abutting a surface of the circuit board opposite the surface resting on the seat.

15. The LED module according to claim 1, wherein the second housing section includes a plurality of fins extending outwardly from the housing adjacent the LEDs.

16. The LED module according to claim 15, wherein the LED module includes at least two columns of LEDs and the second housing section includes at least one fin extending between the two columns of LEDs.

17. The LED module according to claim 16, wherein the second housing section includes at least one fin extending above the LEDs.

18. An LED module, comprising:

a circuit assembly having a plurality of LEDs mounted thereon;

an electrical connector for connecting a first cable carrying power and/or control signals to the circuit assembly;

a first module housing section having a seat defined by at least two spaced walls, wherein the first cable passes between the at least two spaced walls, wherein the seat locates the electrical connector within the LED module and the seat has an upper surface upon which the circuit assembly rests, wherein the first module housing section is structured to provide openings through which the first cable passes, wherein the first cable provides data and power from a first master LED module of a first segment to the LED module, wherein the LED module is a slave LED module of the first segment, wherein the first module housing section is further structured to provide a channel through which a second cable passes, wherein the second cable is aligned in a direction of the first cable, wherein the second cable provides a direct electrical connection between the first master LED module of the first segment and the second master LED module of the second segment, wherein the second cable provides for direct communication between the first master LED module of the first segment and the second master LED module of the second segment;

a second module housing section having apertures through which the LEDs extend, the second housing section being joined to the first housing section; and

a potting material encapsulating the circuit assembly and electrical connector within the LED module.

19. The LED module according to claim 18, wherein the walls of the seat locate the corners of the connector, wherein the walls of the seat extend upwardly from a base of the seat and form a cavity within the seat, wherein the seat locates the electrical connector within the cavity of the seat, wherein the walls of the seat have an upper surface upon which the circuit assembly rests, and wherein the first cable passes through the cavity of the seat.

20. The LED module according to claim 18, wherein the electrical connector has solderless pins in electrical contact with the circuit assembly.

21. The LED module according to claim 18, wherein the periphery of the seat defined by the spaced walls is less than the periphery of the circuit board.

22. The LED module according to claim 18, wherein the spaced walls are corner walls.

23. The LED module according to claim 18, wherein the seat includes four corner walls.

24. The LED module according to claim 18, wherein the electrical connector has a body from which electrical pins extend to electrically connect the first cable to the circuit assembly and wherein the walls of the seat extend at least slightly above the body of the connector.

25. The LED module according to claim 24, wherein the electrical pins are solderless pins.

26. The LED module according to claim 18, wherein the first cable is a ribbon cable and the seat has a pair of apertures therein for locating a portion of the ribbon cable within the LED module, and wherein the first module housing section includes a pair of arms extending underneath the ribbon cable to provide strain relief.

27. The LED module according to claim 26, wherein the first segment and the second segment are disposed end to end so that the first master LED module of the first segment is not adjacent to the second LED module of the second segment, but is in direct communication with the second LED module.

28. The LED module according to claim 18, wherein the second housing section includes a conically shaped seal around each aperture through which the LEDs extend.

29. The LED module according to claim 28, wherein the conically shaped seal is an integral part of the second housing section.

30. The LED module according to claim 18, wherein the second housing section includes a plurality of fins extending outwardly from the housing adjacent the LEDs.

31. The LED module according to claim 30, wherein the LED module includes at least two columns of LEDs and the second housing section includes at least one fin extending between the two columns of LEDs.

32. The LED module according to claim 31, wherein the second housing section includes at least one fin extending above the LEDs.

33. The LED module according to claim 18, wherein the second housing section includes a plurality of members extending downwardly from the interior of the second housing section, the members abutting a surface of the circuit assembly opposite the surface resting on the seat.

34. The LED module according to claim 18, wherein the first and second housing sections snap together.

35. The LED module according to claim 18, wherein the second housing section has a plurality of apertures formed in a side wall of the housing and the first housing section includes a plurality of hooks, each hook snapping into an aperture of the second housing section.