EP2443621B1 - Folding display device - Google Patents

Description

The invention relates to a foldable display device with a plurality of mutually parallel panels, which are mutually connected to each other movable.

The US 2006/209547 A1 discloses the features of the preamble of claim 1.

Display devices, such as those used for large screens, may be constructed of multiple elements to achieve a pack size that allows for transportation or stowage. That's how it shows US 4,110,792 a mobile large screen, which is held on a semi-trailer hydraulically collapsible. The three-part screen is in the form of a triptych with a fixed central section. At the rear of the central screen element hinges are provided laterally, which allow folding of the two lateral parts of the screen behind the central screen. The display panels are designed as a "lamp matrix screen board" for a black and white representation.

From the WO 2004/111808 A1 Furthermore, a hinge is known which is provided for connecting the elements of the display device and whose special design makes it possible, when the display device is open, ie unfolded, to reduce or completely close the hinge gap by means of a sliding movement. Similar hinges are also from the WO 02/063449 A2 known.

The WO 02/33685 A1 finally shows connecting and locking elements for foldable screens, including large screens. Among other things, these screens can also be folded together in the form of a fanfold folding (see FIG. 11 there).

Based on this prior art, it is an object of the present invention to provide a display device that can remain in one place. According to the invention it is provided that the display device is designed not only foldable, but is additionally provided with a receiving device that can accommodate the display device in the folded state. It is advantageous that the display device is designed foldable in a simple manner by the selected Leporello folding, ie the display device is designed by folding individual panels to a screen and can equally be folded again to a column to save space and so as an attractive, architecturally designed stele on chosen place to stand still. It is advantageous that it provides in this form in an outdoor use possible weather conditions, such as wind, only a small attack surface. It can also be sunk in the cradle.

Advantageous developments of the invention are illustrated in the subclaims.

Thus, it is provided that the display device is held on a designed as a support column foot and held on the foot screen consists of an odd number of panels, so that the central panel can be connected to the foot. The foot should be mounted in the receiving device so that it is displaceable in the longitudinal direction of the receiving device. For movement corresponding drives are provided. Further, the central panel is intended to be about a longitudinal axis of the display device, i. in a horizontal plane, be kept pivotally, the latter either by a pivoting device between the foot and the middle panel or by a pivoting device between the receiving device and foot. With these two possibilities of movement, i. Lifting and pivoting, the display device can be sunk on the one hand for storage in the receiving device and on the other hand be aligned with a viewer. The middle panel is adjoined laterally by half of the remaining panels, so that the overall result is a fan-fold or zigzag folding with the middle panel as a supporting panel.

In order to pivot the panels against each other, hinges are provided respectively above and below the panel, each between two panels at least one of the hinges is provided with a (pivot) drive. Such a pivot drive should preferably be designed so that a first wing of the hinge is provided in the region of the hinge axis with a drive wheel and the second wing of the hinge, which is pivotally connected via the hinge axis with the first wing, having a drive device which of the Hinge axis is located away. Drive wheel and drive device are connected to each other in a suitable manner, for example via a toothed belt, a chain, intermediate gears or another form of transmission. The first wing of the hinge is connected to the first panel and the second wing of the hinge to the second panel. The second hinge, which is arranged on the opposite side of the panels, is constructed in a similar way but no drive up. The fact that the drive device is located behind the imaging front can be arranged protected within the panel. The optical effect is thus improved because only a part of the drive device protrudes beyond the panel. To further improve the optical effect, the hinges can be arranged with drive on the side of the panels, on which there is a cable channel, which then completely covers the drive device.

It is also advantageous if all drive means of the individual panels of the display device are coupled together. In this way, a synchronous, simultaneous movement of all panels can be achieved, resulting in a visually appealing folding movement. This coupling can be done mechanically by appropriate transmission means or else electrically, i. be carried out by appropriate control of the individual drive devices. In conjunction with a pivoting movement of the central, the display device as a whole supporting panel, it is also possible to achieve a total linear Auffaltbewegung. For this purpose, all drive devices including the pivot drive for the middle panel are driven accordingly. This is not only visually appealing, but also allows unfolding or folding of the display device even under difficult spatial conditions, for example, if there are obstacles in the vicinity of the display device. Of course, other movement patterns can be displayed by appropriate control.

It is also proposed to use as light or picture elements LEDs. The division of the display device into individual panels results in a border area for each panel. LEDs can advantageously also be arranged in these edge regions, so that the edge regions are no longer visible even when the display device is unfolded. Other known lighting elements, such as LCD panels, always have an edge region, which is then visible in the display device.

The lighting elements may also be grouped in tiling modules. A panel consists of frame elements, preferably of aluminum profiles, which are joined together to form a frame structure, that results in the best possible overall stability (natural frequencies, wind, etc.). Inside the panel are in appropriate brackets each received several of these tile-shaped modules. The leads to the modules are arranged within the single panel. The panel thus acts as a supporting element behind the individual modules and is therefore not visible when the display device is open. At the same time, individual modules can easily be replaced in the event of a defect. The assembly of the display device is simplified by the division into tiling modules, in particular standardized or commercially available modules can be used and separately produced in a simple manner modular different sizes of the display device. By ventilation openings sufficient ventilation of the closed frame structure is ensured.

The receiving device forms a shaft-like foundation for the display device. Also, this recording device can be designed to save space, for example as a tube or as a tubular space frame, since they need to record the display device only in its folded form. Within the tube, a lifting device for the display device is arranged so that the display device can be sunk in the folded state and moved out again. Further, inside the tube there is provided a guide means for the necessary leads to the display device, e.g. for signal and power cables. Finally, a baffle device is provided at the bottom of the tube, which ensures that incoming water does not accumulate in the tube, but can be discharged to the outside. For this purpose, known bilge devices such as bilge pumps, drainage pipes, etc. can be used. In order to protect the receiving device against water ingress, the receiving device can also be closed at the top by a rotatably mounted cover plate. An opening provided in the cover plate corresponds to the cross section of the foot in this area, so that only a small gap remains. Since it is rotatable, the cover plate can move together with the foot. In order to close the receiving device up even with submerged display device, such a cover plate may be additionally provided with horizontally movable plates that can be easily moved or moved via a four-bar mechanism in its closed position.

Overall, such an imageable as a large screen display device is created in which a screen with LED technology by folding into a column in the ground is retractable. Through the aesthetics of the unfolded as well as the folded screen An attractive, architectural element with clear and clean outer contours, as few protruding individual elements as possible and installation of all supply lines under the outer skin.

Fig. 1

eine faltbare Anzeigevorrichtung im aufgefalteten Zustand in einer Ansicht von vorne,

Fig. 2

die Anzeigevorrichtung im zusammengefalteten Zustand,

Fig. 3

die Anzeigevorrichtung im zusammengefalteten Zustand in der Seitenansicht,

Fig. 4

eine Aufnahmevorrichtung für die Anzeigevorrichtung im Schnitt,

Fig. 5

einen Schwenkbereich der Anzeigevorrichtung in einer Ansicht von oben,

Fig. 6

einen Zwischenzustand beim Auffalten der Anzeigevorrichtung in einer Ansicht von oben.

Fig. 7

ein einzelnes Paneel in einer Vorderansicht mit Teilschnitt, und

Fig. 8

ein untenliegendes Scharnier zwischen zwei Paneelen.

The invention is illustrated below with reference to the embodiment shown in the figures. Show it:

Fig. 1

a folding display device in the unfolded state in a front view,

Fig. 2

the display device in the folded state,

Fig. 3

the display device in the folded state in the side view,

Fig. 4

a recording device for the display device in section,

Fig. 5

a pivoting range of the display device in a view from above,

Fig. 6

an intermediate state when unfolding the display device in a view from above.

Fig. 7

a single panel in a front view with partial section, and

Fig. 8

a bottom hinge between two panels.

Fig. 1 shows a designed as a large screen foldable display device 1 in a front view. The display device 1 consists of seven mutually parallel panels 2, 3 and 4, which are movably connected to one another at their longitudinal sides. Fig. 2 shows the display device 1 in the folded state. The display device 1 is in the form of a stela 5 merged. The outer panel 4 forms the front end of the stele 5, the outer panel 4 being arranged so that its display side (shown by a thicker line in the drawing) faces forward. Fig. 3 shows the stele 5 in side view.

The display device 1 is further provided with a base 6 designed as a supporting column, which ensures that the panels 2 to 4 forming a screen 7 are arranged at a distance from a surface 8, and which is also designed to accommodate all occurring loads. The middle panel 3 is held on the foot 6 and carries the other panels 2 and the outer panel. 4

As in Fig. 4 shown, the folded to a stela 5 display device 1 can be sunk in a receiving device 9. The receiving device 9 consists of a closed end tube 10, which is sunk in the ground 11. The stele 5 is completely absorbed by the receiving device 9, so that it is completely below the surface 8 in the lowered state. The stele 5 is mounted in the tube 10 by lateral guides and rollers so that the stele 5 on the one hand in the longitudinal direction of the receiving device 9 is displaceable, but on the other hand, moments occurring at the foot 6 can be supported: The tube 10 is formed as a drying space. For this purpose, the tube 10 is closed at its upper side with a cover and provided at the bottom with a bilge pump 27. The cover consists of a rotatably mounted cover plate 40 having an opening which corresponds to the cross section of the foot 6. On the cover plate 40, two horizontally displaceable plates 41 are provided in order to close the tube 10 can be sealed up when the display device 1 is lowered.

An electric lifting drive for the foot 6 is designed as a chain drive. A worm geared motor 28 mounted on the inner wall of the tube 10 drives a chain 29 fixedly connected to the foot 6.

Below the surface 8, the display device 1 is rotatably held in a bearing ball bearing and pivotable with an electric pivot drive 12. Thus, the foot 6 and thus also the screen 7 can be aligned over a wide area towards a viewer. Fig. 5 shows in a view from above the pivoting range of the screen 7 over an angular range of ± 135 °.

The pivot drive 12 is also used for space-saving unfolding of the screen 7. Fig. 6 shows in a view from above an intermediate state when unfolding the screen 7. In this illustration, it is also easy to see that due to the mutual connection of the panels 2 to 4 with each other a total of zigzag or Leporello folding arises. During the unfolding of the screen 7, the pivoting device 12 pivots the base 6 and thus also the middle panel 3 connected thereto. The further panels 2 and 4 are pivoted synchronously so that the screen 7 as a whole unfolds along its longitudinal axis L. The folding of the screen 7 proceeds in the same way. After the screen 7 is folded in this way to the stela 5, the pivoting device 12, the foot 6 still rotate by another 90 °, so that the outer panel 4 with its imaging display side (represented by the thick line) back to the viewer points. Now, the outer panel 4 at the stele 5 for playback of current information, such as time, barometric or barographic information, temperature, advertising materials, etc. can be used.

Fig. 7 shows a single panel 2 in a front view. The imaging front side of the panel 2 consists of five tiled display modules 20. Behind this, a support structure is provided, which consists of a circumferential frame structure 21 with transverse struts 22 and possibly further reinforcements. The elements of the frame structure 21 as well as the transverse struts 22 are made of aluminum hollow profiles, which are accurately assembled via corresponding plastic connecting parts. The modules 20 are respectively held on the frame 21 and the transverse struts 22. The modules 20 may in turn be constructed from smaller display modules and are equipped in the embodiment with LED 24 as light elements. The imaging display page panel consists of 5 modules 20, which in turn are each composed of 9 LED tiles (LED-IM). The tiles are screwed onto a plate and together with the electronic control form the module 20, which is then screwed to the frame 21.

The space behind the modules 20 leaves enough space for the accommodation of power supplies and the video processors and for a laying of the leads, which are then brought together in a provided below on the panel 2 to 4 cable channel 23. The cable channels 23 of the individual panels 2 to 4 form a cable guide to the foot 6 in total. Within the foot 6, the leads are guided by a further, not shown in detail cable channel into the tube 10 in that they join the pivoting movements of the display device as possible torsionally. An energy guide chain 25 leads the leads further to a junction box 26, which is located on the inside of the tube 10. The energy guide chain 25 is fixedly connected to the foot 6 and the tube 10 and can roll on the inside of the tube 10, so that the leads are securely routed and guided.

On the back side, the panels 2 are closed by a patch on the frame 21 cover, in which the ventilation openings are introduced.

The screen 7 consists of a total of seven panels 2 to 4, which are each connected via 180 ° hinges 30 with each other, so that they accordion-like, according to the Folding principle Leporello, can be folded up. Each hinge 30 has an opening angle of 180 ° and is formed similar to a door hinge. Within the hinge 30, the loads and rotational movements are recorded in rolling bearings, which have a high precision and can control the function when folding the screen 7 safely. In each case a hinge 30 is struck against the frame top and bottom sides of the panels 2 to 4, whereby an exact movement of the panels 2 to 4 is ensured. In addition, the center of each frame structure 21 is supported by a centering and stop pin, which allows further fixing and positioning of the panels 2 to 4 to each other.

Fig. 8 shows a mounted between two panels 20 down hinge 30, in which a drive 31 via a toothed belt 32 allows the folding or pivoting operation. Each hinge has two wings 33, 34 which are interconnected along a hinge axis S. The hinge axis S is arranged so that it comes to lie slightly above the surface of the panels 2 - in the example shown, the surface is formed by the modules 20 and the hinge axis S about 1 mm above, so that in the folded state, a gap of 2 mm. That is, the distance between the hinge axis S and the surface of the panels 2 determines the distance of the panels 2 to each other in the folded state; it should be as small as possible so as not to cause any disturbing gaps within the stele 5, but on the other hand sufficiently large so that the LEDs on the front of the panels 2 and 3 do not touch in the folded state of the screen.

The first wing 33, the in Fig. 8 on the right panel 20 'is mounted, has a drive device 35, here a gear for driving the toothed belt 32. The second wing 34, however, in the embodiment according to Fig. 8 attached to the left panel 20 is concentric with the hinge axis S provided with a drive wheel 36 which is looped by the toothed belt 32. Two tensioning rollers 37 mounted on the first wing 33 provide a large wrap angle of the toothed belt 32 on the drive wheel 36.

LIST OF REFERENCE NUMBERS

Sign label

1

display device

2

paneling

3

paneling

4

outer panel

5

stele

6

foot

7

screen

8th

surface

9

cradle

10

tube

11

soil

12

electric rotary actuator

20

display modules

21

frame structure

22

crossbars

23

Cabel Canal

24

LED

25

Power supply chain

26

junction box

27

bilge pump

28

Worm gear motor

29

Chain

30

hinges

31

drive

32

toothed belt

33

hinge leaf

33

first wing

34

hinge leaf

34

second wing

35

driving device

36

drive wheel

37

tensioners

40

cover

41

plates

L

longitudinal axis

S

hinge axis

Claims (11)

1. A foldable display device (1), with several panels (2, 3, 4) arranged in parallel to each other, which are movably connected with each other, wherein connection elements (30) are arranged so that there is formed in total a leporello folding, characterised in that there is provided a housing device (9), which may be arranged lowered in the ground and is tightly closable upwards, and which may completely accommodate the displace device (1) in the folded condition (5).
2. A display device according to claim 1, characterised in that the display device (1) is arranged on a stand (6) and that there is provided an odd number of panels (2, 3, 4), wherein the central panel (3) is connected with the stand (6).
3. A display device according to claim 2, characterised in that the stand (6) in the housing device (9) is arranged so that it is, on the one hand, slidable in the longitudinal direction of the housing device (9) and, on the other hand, mounted pivotable about the longitudinal axis of the central panel (3), and wherein for both movements there is provided respectively one driving element (28, 12).
4. A display device according to claim 3, characterised in that there are provided as connecting elements arranged above and underneath the panels (2, 3, 4) hinges (30), which connect respectively two panels (2, 3, 4) movably with each other, wherein there is provided respectively at least one of the hinges (30) with a driving element.
5. A display device according to claim 4, characterised in that the driven hinge (30) consists of two leaves (33, 34), wherein the first leaf (33) is connected with a first panel (2, 3, 4) and provided in the region of the hinge axis (S) with a driving wheel (35), and wherein the second leaf is connected with a second panel (2, 3, 4) and has a driving device (36), which is arranged remote from the hinge axis (S) and connected with the driving wheel.
6. A display device according to claim 5, characterised in that all driving devices (31) of the display device (1) are coupled with each other.
7. A display device according to any one of the preceding claims, characterised in that each panel (2, 3, 4) is provided at its front side with LEDs (24) as light or picture elements.
8. A display device according to claim 7, characterised in that the light elements (24) of the panels (2, 3, 4) are grouped in tile-like modules (20), wherein the modules (20) are each accommodated in a panel-side hold (21, 22) and wherein feed lines to the modules (20) are arranged within the panel (2, 3, 4).
9. A display device according to any one of the preceding claims, characterised in that the housing device (9) consists of a pipe (10) that is arranged lowered in the ground (11), and that at the end of the pipe (10) there is arranged a rotatably supported cover plate (40), the opening of which corresponding to the cross-section of the stand (6), and at which there are provided further movable plates (41), by means of which the opening may be closed.
10. A display device according to claim 9, characterised in that a lifting device (28) as well as a guiding device (25) for feed lines to the display device are arranged within the pipe (10) and that the lifting device (28) and the guiding device (25) are arranged so that they remain within the pipe (10) even upon complete extension of the display device (1).
11. A method for unfolding a foldable display device, with several panels (2, 3, 4) arranged in parallel to each other, which are respectively foldably connected with each other and together form a projection screen (7), wherein the projection screen (7) is configured pivotably, characterised in that a pivotable panel (3) is pivoted during the unfolding of further panels (2, 4) so that there is developed in total a substantially linear unfolding movement alongside a longitudinal axis (L) of the projection screen (7).

Images