Adjustable display tile for tiled display

Patent metadata

Field	Value
Publication number	US-9886877-B2
Application number	US-201515317761-A
Country	US
Kind code	B2
Filing date	Jun 12, 2015
Priority date	Jun 13, 2014
Publication date	Feb 6, 2018
Grant date	Feb 6, 2018

Abstract

A display tile including a display board and a carrier board fastened together by the intermediary of a spacer and an adjusting means positioned between the spacer and the carrier board. The adjusting means engage in an opening in the carrier board. Also methods to adjust the distance between the top of a LED on a first surface of a LED board on a display tile and the back surface of the carrier board of the display tile.

First claim

The invention claimed is:

1. A display tile comprising a display board and a carrier board, LED's being mounted on a first face of the display board and the carrier board being for attachment to a frame, the display board and the carrier board being fastened together by the intermediary of a spacer and an adjusting means positioned between the spacer and the carrier board wherein the adjusting means engage in an opening in the carrier board, the adjusting means allowing a compensation of the tolerances affecting the position of the LED's with respect to the carrier board in a direction perpendicular to the carrier board whereby the compensation is obtained by the position of the adjusting means in their corresponding opening,
wherein the display board has LEDs and the distance between a first surface of the adjusting means and a first surface of the carrier board is set to the difference between a nominal distance and the sum of the distance between the tops of LEDs on the LED board and a second surface of the LED board, the length of the spacer, and the thickness of the carrier board, wherein the nominal distance is the distance between the top of the LEDs and the second surface of the carrier board or back of the carrier board.

2. The display tile according to claim 1 , wherein a sidewall of the opening in the carrier board is perpendicular to the second surface of the carrier board.

3. The display tile according to claim 1 , wherein a sidewall of the adjusting means is parallel to the sidewall of the opening in the carrier board.

4. The display tile according to claim 1 , wherein the thickness of the adjusting means is less than the thickness of the carrier board.

5. The display tile according to claim 1 , wherein the adjusting means is selected from:
being fastened to the carrier board by glue extending on a second surface and/or a sidewall of the adjusting means and a sidewall of the opening, and
having a first part that is a circular right cylinder with a first radius and a second part that is a circular right cylinder with a second radius smaller than the first radius.

6. The display tile according to claim 1 , wherein a fastening means fastens the adjusting means to the spacer.

7. The display tile according to claim 6 , wherein the fastening means is selected from going through an opening in the adjusting means, and being a screw.

8. The display tile according to claim 1 , wherein a threaded extension extends from the first surface of the adjusting means and that the spacer has a matching threaded opening to receive the threaded extension.

9. The display tile according to claim 8 , wherein the second surface of the adjusting means is a driving surface.

10. A tiled display apparatus comprising a plurality of display tiles according to claim 1 fixed to a frame.

11. A method to adjust the distance between the tops of the LEDs on a first surface of a LED board on a display tile and the back surface of the carrier board of the display tile, the method comprising the steps:
positioning the tops of the LEDs on a LED board in a first reference plane,
aligning openings in the carrier board with spacers distributed on the LED board,
positioning a second surface of a carrier board in a second reference plane; a first surface of the carrier board facing a second surface of the LED board; the first and second reference planes being parallel and the distance between the first and second reference planes being equal to a desired nominal distance,
moving adjusting means in the openings until a first surface of each adjusting means contacts a spacer,
fastening each adjusting means to its corresponding spacer,
fastening the adjusting means to the carrier board,
wherein moving the adjusting means comprises changing the position of the adjusting means in the openings until the distance between the first surface of the adjusting means and the first surface of the carrier board is set to the difference between the nominal distance and the sum of the distance between the tops of LEDs on the LED board and a second surface of the LED board, the length of the spacer, and the thickness of the carrier board, and
wherein the desired nominal distance is the distance between the top of the LEDs and the second surface of the carrier board or back of the carrier board.

12. The method of claim 11 , wherein glue is dispensed in the openings, on sidewalls of the openings and on a second surface of the adjusting means.

13. The method of claim 12 , wherein the glue is allowed to harden, to set or to cure to fasten the adjusting means to the carrier board at the position where the adjusting means compensates for the tolerances affecting the position of the LEDs with respect to the carrier board in a direction perpendicular to the carrier board.

14. The method of claim 12 , wherein the height of the sidewalls is selected such that when the sidewalls are in contact with the carrier board, the distance between the second surface of the carrier board facing away from the reference surface and the reference surface is equal to the desired nominal distance between the tops of the LEDs on the LED board and the second surface of the carrier board.

15. The method of claim 12 , wherein the adjusting means and the spacer are fastened by glue being dispensed in the openings to fasten the adjusting means to the carrier board and to fix its position in the openings, thereby guaranteeing that when the carrier board and LED board are taken out of the jig, the distance between the second surface of the carrier board and the tops of the LEDs is equal to the desired nominal distance.

16. The method of claim 12 , wherein the distance between the top of the outermost part to which the sidewall extends and the reference surface in a direction perpendicular to the reference surface is made equal to the desired nominal distance.

17. The method of claim 12 , wherein a flexible material is positioned between the top of the innermost part of the sidewall and the carrier board.

18. The method of claim 17 , wherein the thickness of the flexible material is selected so that pressure applied to the carrier board makes the second surface of the carrier board flush or coplanar with the top of the outermost part of the sidewall of the jig.

19. The method of claim 18 , wherein when the second surface of the carrier board is flush with the top of the outermost part of the sidewall of the jig, the distance between the tops of the LED and the second surface of the carrier board is made to be the desired nominal distance.

20. The method of claim 11 , wherein the fixing of the distance between the top of the LEDs and the second surface of the carrier board is facilitated by using a jig manufactured with better tolerances than the LED board and the carrier board.

21. The method of claim 20 , wherein the jig has a first surface or reference surface and sidewalls that extend from the first surface of the jig, the method further comprising if the tolerance on the thickness of the carrier board is sufficiently small to be neglected, the top of the sidewalls serves as a support or stop for the carrier board that is positioned in parallel with the reference surface.

22. The method of claim 21 , wherein the LED board is positioned with the LEDs in contact with the reference surface.

23. The method of claim 11 , wherein the position of the adjusting means in the opening of the carrier board is modified until a first surface of the adju

Assignees

• Barco Nv

Inventors

• Declerck Tom

Classifications

• G09F9/33

  being semiconductor devices, e.g. diodes · CPC title

• G09F9/3026 Primary

  Video wall, i.e. stackable semiconductor matrix display modules (video wall control systems G06F3/1446, G09G2300/026) · CPC title

• G09G2300/026

  Video wall, i.e. juxtaposition of a plurality of screens to create a display screen of bigger dimensions · CPC title