LARGE SCALE DISPLAY SYSTEM

• US 20090128461A1
• Filed: 09/28/2006
• Published: 05/21/2009
• Est. Priority Date: 09/28/2005
• Status: Abandoned Application

• Current Assignee: Laadtech Pty., Ltd.
• Original Assignee: Laadtech Pty., Ltd.
• Inventors: Xavier, Dominic Michael, Inglis, Peter, Menzies, Scott Andrew, Geldard, William Scott
• Application Number:
  US12/088,531
• Publication Number:
  US 20090128461A1
• Time in Patent Office: Days
• US Class Current: 345/84
• CPC Class Codes: G06F 3/1446 display composed of modules, e.g. video walls
• CPC Class Codes: G09F 19/22 Advertising or display means on roads, walls or similar surfaces, e.g. illuminated
• CPC Class Codes: G09F 19/226 External wall display means; Facade advertising means
• CPC Class Codes: G09F 9/33 being semiconductor devices, e.g. diodes
• CPC Class Codes: G09G 3/32 semiconductive, e.g. using light-emitting diodes [LED]

Abstract

A large scale LED display system (12) is provided on a building structure (100). The system has a screen (12) formed of a number of side by side display panels (14) which may be foldable or rollable. Each panel has a number of equally spaced transparent polycarbonate tubes (80) which house pixel units (50) of LEDs (51) connected to printed circuit board (120) and a row controller (121) for controlling luminance of the LEDs. A bus member (54) convey power and video control signals from a panel controller (77) to each row controller. The panel controller has an initialising process adapted to allocate temporary addresses for the tubes and determine screen size accordingly. Video segments are extracted by the row controllers based on the addresses associated with the video control signals from the panel controller.

Claims

1. A large scale display system for displaying images, the system comprises a display screen formed of one or more display panels, the or each said display panel having at least one display segment formed of spaced elongate members, each elongate member having a conductive carrier supported therein and spaced controllable pixel units mounted on said conductive carrier, the pixel units in the elongate members being arranged to form a matrix of pixels;

a bus member arranged along one edge of the display screen, or along one or each of the opposed edges of the or each said display panel for conveying power and/or video data signals to said carriers;

the bus member of the or each said display screen or panel being in communication with a panel control unit arranged to supply said power and/or video data signals to the bus member(s) of the or each panel/segment for controllably energising said pixel units thereof to thereby controlling luminance of the pixels.

2. The system according to claim 1 wherein each elongate member has a video control unit arranged to, in response to the video data signals, controllably energise said pixel units therein.

3. The system according to claim 1 wherein the elongate members are arranged in at least one group of linked elongate members, and one of the linked elongate member in the or each group has a video control unit arranged to, in response to the video data signals, controllably energise said pixel units in the linked elongate members.

4. The system according to claim 1 wherein said panel control unit(s) is configured to receive video signals from a video source and to transform the received video signals into modulated video data signals for conveying to the bus member(s).

5. The system according to claim 4 wherein the video data signals being superimposed on power for the pixel units.

6. The system according to claim 1 wherein the panel control unit(s) having an initialisation arrangement for initialising the video control units in the elongate members to respond to the video data signals with corresponding addresses allocated to the elongate members.

7. The system according to claim 6 wherein the initialisation arrangement is configured to determine screen or panel pixel size in accordance to the allocated addresses.

8. The system according to claim 1 further comprising a suspension arrangement for suspending said elongate members in a vertically or horizontally spaced direction, the suspension arrangement having said one or more bus member(s) and/or one or more suspension lines extending along the or each said display panel.

9. The system according to claim 8 wherein the bus member(s)/suspension lines are relatively flexible in a manner to allow the display panels to be foldable or rollable.

10. The system according to claim 8 wherein the elongate members are adapted to be pivotally movable and further comprising a controllable driving arrangement for driving said elongate members to pivotally move between two orientations, one being for viewing images formed by the illuminance of the LEDs and the second being for viewing static information formed on the elongate members.

11. The system according to claim 8 wherein each said bus member and/or each said suspension line is associated with a plurality retention clips, each of which being configured to retain an elongate member received therein.

12. The system according to claim 11 wherein the clips are arranged to be pivotally movable so that orientation of the elongate members can be selectively positioned.

13. The system according to claim 1 wherein the display screen is formed of two or more of said display panels arranged side by side, and adjacent display segments of the side by side display panels are arranged to be interconnectable.

14. The system according to claim 13 wherein the elongate members be formed or provided with end flanges shaped so that one end of each elongate member in a display panel can be interconnected with an adjacent end of a corresponding elongate member in an adjacent display panel.

15. The system according to claim 13 further comprising coupling members, each coupling member being adapted to interconnect adjacent ends of corresponding tubular members in side by side display panels.

16. The system according to claim 1 wherein the conductive carrier in each elongate member being formed of a flexible or rigid material.

17. The system according to claim 16 wherein the conductive carrier is formed as a circuit board having one or more control circuit modules for the corresponding pixel units.

18. The system according to claim 16 wherein the bus member(s) are arranged to carry control signals so that the control circuit modules on the conductive carriers connected thereto can control luminance of the LEDs in accordance with the control signals.

19. The system according to claim 17 wherein the bus member(s) being arranged to carry an AC power source injected with control signals for the pixel units, and the control circuit modules are arranged to transform the AC power source into a DC power source for use by the pixel units to energise the LEDs, and to filter the control signals for controlling luminance of the LEDs.

20. The system according to claim 1 further comprising a heat transfer arrangement adapted to transfer heat from the conductive carrier in each elongate member to exterior thereof.

21. The system according to claim 20 wherein the heat transfer arrangement has a heat sink element fixed to each elongate member and one or more fixing elements made of a heat conductive material are adapted to fix the heat sink element to the associated elongate member and to transfer heat from said conductive carrier to the heat sink element.

22. The system according to claim 1 wherein each elongate member being formed with a hollow extending therethrough and bounded by a base, a rear wall, an open front or substantially transparent front wall, and a top section. The conductive carrier is mounted in the hollow and the pixel units are arranged for the LEDs to be facing said an open front or substantially transparent front wall.

23. The system according to claim 22 wherein the pixel units are positioned so that the LEDs are at a distance from said an open front or substantially transparent front wall to limit direct sunlight on the LEDs.

24. The system according to claim 22 wherein the elongate members each having a sun shield adapted to substantially shield the LEDs in said hollow.

25. The system according to claim 22 wherein the top section of each elongate member may have a top plate arranged to be removable and bearing a part of a static printed information.

26. The system according to claim 25 wherein the top section of each elongate member is formed with facing grooves for removably receiving its top plate.

27. The system according to claim 1 further comprising an electrical connection arrangement having connector assemblies spacedly fixed the or each bus member and the connector assemblies are adapted for connection to respective conductive carriers in the elongate members.

28. The system according to claim 27 wherein said connector assemblies are of an insulation piercing type having conductor elements arranged to penetrate into an insulation about the bus member(s).

29. The system according to claim 28 wherein the bus member(s) are of a flat insulated cable with wire groups therein and the conductor elements are adapted to contact the wire groups when pierced through the insulation.

30. The system according to claim 1 wherein the or each said display panel has a plurality of display segments arranged in an array, and adjacent display segments in said array are mechanically and/or electrically connected to each other.

31. The system according to claim 1 wherein the display screen having a top, a bottom and opposed sides, and the bus member is arranged along either the top or bottom, or one of the opposed sides.

32. The system according to claim 1 further comprising a decoding arrangement for decoding control signals for the pixels into decoded signals and the decoding arrangement is arranged to provide the decoded signals to control said luminance of the pixels.

33. The system according to claim 32 wherein the decoding arrangement includes a decoder for each elongate member.

34. The system according to claim 1 wherein each of the pixel units having one or more controllable light emitting diodes (LEDs) in a single or multiple colours.

35. The system according to claim 34 wherein each said pixel unit has a red LED, a green LED and a blue LED, and the processor unit is arranged to produce control signals that can control the LEDs in the pixel units to produce luminance over a substantially full range of colour spectrum.

36. The system according to claim 1 further comprising a sway restraining arrangement for limiting sway of said display screen.

37. The system according to claim 36 wherein the sway restraining arrangement having a number of spaced release able securing members for securing the display screen to a support structure.

38. The system according to claim 1 further comprising a support arrangement for supporting said display screen on a support structure, the support arrangement including a set of brackets configured to be releaseably fixed to the support structure and to support the top of the or each unfolded or unrolled display panel of the display screen.

39. The system according to claim 38 wherein the or each display panel having its top fixed to a roll and the support arrangement having a spindle extending through the roll or rolls and arranged to turn said roll(s) so the display panel(s) can be retracted on said roll(s) for storage or transportation, and extended during use.

40. The system according to claim 39 wherein a drive arrangement is associated with the spindle to facilitate turning of said roll(s), and the drive arrangement having a controllable electric motor coupled to drive said spindle.

41. The system according to claim 1 wherein the top, bottom and the opposed sides of the display screen being shaped to conform to a particular shape of the support structure.

42. The system according to claim 1 wherein the pixel units are arranged to form a pixel pitch ranging from about 25 mm to about 100 mm depending on expected viewing distance.

43. A large scale display system for displaying images, the system comprises a display screen formed of one or more foldable or rollable display panels, the or each said display panel having at least one display segment formed of intersecting conductive wires arranged in a matrix of rows and columns, and spaced pixel units supported by one or more of the wires in said rows or columns, or by one or more support lines extending along the or each said display panel, and the spaced pixel units being arranged to be controllably energisable pixels;

a bus member arranged along one edge of the display screen or along one edge of the or each said display panel for conveying power and/or control signals to said wires; and

a panel control unit provided for the or each said display panel and arranged to supply said control signals to the bus member(s) for controlling luminance of the pixels, said panel control unit(s) being configured to receive video signals from a video source and to transform the received video signals into modulated video data signals for conveying to the bus member(s) and having an initialisation arrangement for initialising the pixel units to respond to video data signals with corresponding addresses allocated to the pixel units.