Foldable display device

1. A foldable display device, comprising several panels arranged in parallel to each other, which are movably connected with each other, wherein connection elements are arranged so that there is formed in total a leporello folding, wherein there is provided a housing device, which may be arranged lowered in the ground and is tightly closeable upwards, which may completely accommodate the displace device in a folded condition.

2. A display device according to claim 1 , wherein the display device is arranged on a stand and that there is provided an odd number of panels, wherein the central panel is connected with the stand.

3. A display device according to claim 2 , wherein the stand in the housing device is arranged so that it is slidable, on the one side, in the longitudinal direction of the housing device and, on the other side, mounted pivotable about the longitudinal axis of the central panel, and wherein for both movements there is provided respectively one driving element.

4. A display device according to claim 3 , wherein there are provided as connecting elements arranged above and underneath the panels hinges, which connect respectively two panels movably with each other, wherein there is provided respectively at least one of the hinges with a driving element.

5. A display device according to claim 4 , wherein the driven hinge comprises two leaves, wherein the first leaf is connected with a first panel and provided in the region of the hinge axis with a driving wheel and wherein the second leaf is connected with a second panel and has a driving device, which is arranged remote from the hinge axis and connected with the driving wheel.

6. A display device according to claim 5 , wherein all driving devices of the display device are coupled with each other.

7. A display device according to claim 6 , wherein each panel is provided at its front side with LEDs as light or picture elements.

8. A display device according to claim 1 , wherein each panel is provided at its front side with LEDs as light or picture elements.

9. A display device according to claim 8 , wherein the light elements of the panels are grouped in tile-like modules, wherein the modules are each accommodated in a panel-side hold and wherein the feed lines to the modules are arranged within the panel.

10. A display device according to claim 9 , wherein the housing device comprises a pipe that is arranged lowered in the ground, and that the pipe is arranged at the end of a rotatably arranged cover plate, the opening of which corresponding to the cross-section of the stand, and at which there are provided further movable plates, by means of which the opening may be closed.

11. A display device according to claim 1 , wherein the housing device comprises a pipe that is arranged lowered in the ground, and that the pipe is arranged at the end of a rotatably arranged cover plate, the opening of which corresponding to the cross-section of the stand, and at which there are provided further movable plates, by means of which the opening may be closed.

12. A display device according to claim 11 , wherein a lifting device as well as a guiding device are arranged for the feed lines to the display device within the pipe and that the lifting device and the guiding device are arranged so that they remain within the pipe even upon complete extension of the display device.

13. A method for unfolding a foldable display device, comprising several panels arranged in parallel to each other, which are respectively foldable connected with each other and together form a projection screen, wherein the projection screen is configured pivotable, wherein a pivotable panel is pivoted during the unfolding of further panels so that there is developed in total a substantially linear unfolding movement alongside a longitudinal axis of the projection screen.