WO2021255259A1

WO2021255259A1 - Display device

Info

Publication number: WO2021255259A1
Application number: PCT/EP2021/066658
Authority: WO
Inventors: Knud Hartung; Luca Lehnert; Prof. Bernhard GEISEN; Yorgo Liebsch
Original assignee: Cala.Media Gmbh
Priority date: 2020-06-19
Filing date: 2021-06-18
Publication date: 2021-12-23
Also published as: EP3926612A1

Abstract

The invention relates to a display device (1; 21) with at least one image display (3; 23), said image display (3; 23) being arranged on a display support (2; 22). The display support (2; 22) is coupled to a stand device (4; 24) which lies on an underlying surface. The display support (2; 22) and the stand device (4; 24) can be adjusted relative to each other between a folded position and a display position. Drive means (7, 8, 9; 29, 30, 31, 31a; 50) which produce an effect between the display support (2; 22) and the stand device (4; 24) are used to drive the adjustment process and are coupled to a controller (10; 35; 45). The controller (10) is coupled to a detection device (5; 25; 40) which detects a person approaching the display device (1; 21). The controller (10; 35; 45) actuates the drive means (7, 8, 9; 29, 30, 31; 50) on the basis of a detected approach.

Description

Display device

The invention relates to a display device. In particular, the invention relates to a display device in which an image display is arranged on a display carrier, the display carrier being coupled to a stand device which is designed to be placed on or attached to a substrate.

The display support provides a bracket for the image display. A stand device coupled to the display carrier secures the display carrier on the ground against tilting and shifting. For this purpose, the stand device is provided with support surfaces or a leg construction, which allows a secure stand on the ground. Fastening points can also be provided on the stand device in order to allow it to be fixed to a prepared substrate.

Display devices of the type mentioned can be used in many areas, for example as signposts, for displaying news and current information and in particular for advertising purposes. Corresponding display devices are often used in the context of sporting events, where display devices with applied, labeled tarpaulins or electronic video tapes are known, for example. The display devices are usually arranged in the edge area, outside of the playing field or the competition course, whereby, for safety reasons, it is important to observe safety distances in so-called free zones.

This is necessary in order to reduce the risks for athletes who could collide with such display devices during the game and would thus be exposed to a risk of injury.

From EP 3610 930 B1, for example, a display in the form of a mini-band is known, which is used in the vicinity of play areas and sports facilities. Such display devices can also be used in a number of other sports areas, for example those that are operated without boundaries of the playing field and instead with routes. For example, in biathlon or cross-country skiing, boards are used for various display purposes along the route. So-called V-stands ensure a route that prevents the athlete from taking the wrong path in competition.

In order to minimize the risk of injury on contact with such display devices, these can be provided with padding. In addition, the free zones, that is to say the distances from the active game, are dimensioned in such a way that the risk of injury is reduced, the type and structure of the display device also having to be taken into account when dimensioning the free zone.

The object of the invention is to provide a display device which reduces the risk of injury to athletes.

This object is achieved by a display device with the features of claim 1.

According to the invention, a display device according to the invention of the type mentioned at the beginning has an adjustable coupling of the display carrier to the stand device. Via this mechanical coupling, the display carrier can be adjusted between a folded position and a display position with respect to the stand device.

The display position is characterized in that the display carrier encloses such an angle with the stand device that the display carrier together with the image display attached to it is in an erected, clearly visible position relative to the background. The image display has to be at an angle that allows good visibility and legibility when viewed from a horizontal direction and when viewed from a raised angle. One of these is regular The angle of the display support relative to the background is between a few degrees (close to 0 degrees), but preferably between 40 degrees and 90 degrees (with the image display pointing upwards or diagonally upwards).

In the folded position, on the other hand, the display carrier forms a more acute angle with the stand device, so the display carrier is closer to the stand device and the underlying surface and protrudes less from the surface. The entire display device is then folded flat (or also folded) with respect to the display layer, which explains the designation of the folded position. The angle that the display support assumes in relation to the underlying stand device is smaller in this folded position than in the display position, e.g. less than 40 degrees, but mostly close to or equal to 0 degrees.

As far as the design and shape of both the display carrier and the image display as well as the stand device are concerned, there are hardly any design limits. The image display can be designed as a printed plate or tarpaulin, but in particular also as an electronic image display in the form of an electronic display. Electronic displays of any type, such as, for example, LED displays, OLED displays or TFT displays, can be attached to the display carrier and move with it between the folded position and the display position. The display carrier can, for example, have a carrier plate on which one or more modules of electronic image displays are placed. It can also be a frame in which one or more panels of an electronic image display is / are inserted or suspended. The multi-part design of the display carrier is also possible, for example by arranging several struts between which the image display is attached. In the case of using a tarpaulin or panel or covering as an image display, fastening means or clamping receptacles can be provided on the display carrier. Bulbs can also be used be provided in order to backlight or illuminate the tarpaulin or panel or covering.

In particular, the display carrier can form a flat element or an element formed by struts and rungs. The display support can be dimensioned in such a way that, when it is arranged on the stand device and placed on the ground, it extends longer in the horizontal width than in the height, corresponding to the elongated form of known perimeter advertisements. Alternatively, designs are also possible in which the display carrier has a more square shape.

In the edge areas of the display support and the electronic image display arranged thereon, cushions or damping elements can be located in order to provide edge protection that protects both the electronic image display and persons who come into inadvertent physical contact with the display device. For such protection, foam or rubber bumpers, as well as air cushions or gel cushions, can be attached in the edge areas of the display support and the electronic image display.

The image display itself can be glued, screwed, clipped or connected with other conventional fastening means to the display carrier. Further mechanical protective elements can also be used to protect an electronic image display that is used against mechanical effects. When using sensitive display technologies, for example, superior transparent protective devices made of transparent plastic or potting compounds can be used, as well as so-called shaders, ie plastic grids in which the display elements of the electronic display device are embedded. Projection devices can also be used as electronic display devices. Flexible elements can also be incorporated into the display carrier as cushions or carriers, which cushion the image display against impacts or impacts.

The stand device, which is designed to rest on the ground or to be attached to the ground, can also have a flat construction or several support legs or support webs to which the display support is pivotably attached. The stand device can also be designed with a trough in which the display carrier is partially received when it is moved into the folded position. The stand device provides the necessary support by resting on the surface or by fixing it to the surface to support the display carrier in every position between the folded position and the display position and to secure it against tilting and also to absorb and dissipate forces acting on the movement of the display carrier.

The connection between the display carrier and the stand device can, as described further below, have bearings, hinges or rods or other mechanical coupling means which allow a repeated adjustment of the display carrier with respect to the stand device.

According to the invention, drive means are provided which are arranged with effect between the display support and the stand device and adjust the display support between the folded position and the display position. In addition to a primary drive (for example in the form of an electric motor), the drive means can have further components such as power transmission members, power deflectors, gears and control means. For example, flexible shafts on the drive can serve as a means of deflecting and introducing force. The term also includes gears, bevel gears, chain drives or other power transmissions or power deflection means, for example also drive trains as they are known from the field of transport, e.g. bicycles (belt or chain drives or power transmissions with other bicycle drive trains such as “ceramicspeecT transmission lines). When drive means with motorized drives are mentioned in the context of this application, this particularly includes drives which allow any kind of electronic control.

The drive means can also have further stabilization means (holding means), for example in the form of brakes or locks, which can stabilize the display carrier in a position once it has been reached by the drive means. Any mechanical locks that can be canceled, as well as hydraulic or pneumatic locks, can be used here. If the display carrier is in the display position, the drive means ensure that it remains stable in this and the display device can thus develop its display effect.

A control device is coupled to the drive means. The control device controls the drive means in order to effect an adjustment of the display carrier relative to the stand device. Conventional programmable circuits and also individually configured circuits can be used as the control device.

The drive means can in principle be designed for an active, driven adjustment of the display carrier in only one direction, that is to say in the direction of the folded position or in the direction of the display position. This is particularly conceivable when a change in position takes place in the other direction without an active drive. This can be achieved by mechanical tensioning means (e.g. spring elements) or by the effect of gravity. In such a case, the drive means can be activated, for example, in order to actively transfer the display carrier from the display position to the folded position. The driven movement can also take place by overcoming a counterforce of a spring or other tensioning means, which then, after appropriate control of the drive means, erects the display carrier again (including the Drive is switched to idle, for example). Likewise, the drive means can be designed for the exclusive erection of the display carrier from the folded position into the display position, while the movement in the other direction (folding) takes place under the action of a spring and / or the force of gravity.

However, it is particularly reproducible and precise when the drive means drive and guide both the erection and the folding, that is to say drive both the movement into the display position and into the folded position. This ensures reproducible speeds of the movements in both directions. The adjustment from the display position to the folded position can also be done more quickly by means of a drive than by the mere action of gravity or tension. To create the drive, motors with high speed and rapid reaction can be used, as they are known, for example, from the areas of application of drives for CNC machines.

The combination of the features mentioned above provides a display device in which a display carrier is adjustable by a controllable drive relative to a stand device, it being held in a display position by appropriately controllable drive means. In order to transfer the display carrier from the display position into the folded position as required, a control device is coupled to the drive means.

A detection device, which detects an approach of a person to the display device, is in turn coupled to the control device. The control device controls the drive means as a function of the detected approach. The detection device can be arranged on the display device itself, but the detection device can also be a separately placeable detection device which generates control signals for the Generated control device, which are transmitted to the control device wirelessly or wired.

The detection device ensures that an approach of a person or an object to the display device is detected. For example, an approach of an athlete is detected, the control device receives corresponding approach data or control data and the risk of injury to the athlete is reduced by activating the drive means so that the display carrier is adjusted in the direction of its folded position. The display device is thereby removed from the probable path of movement of the athlete or the risk of injury is at least reduced for an impact on the athlete. In such a state, the display device no longer represents a significant risk of injury for the athlete, since he does not collide with a protruding, stiffened display device when physically acting on the display device, since this was folded up before the collision. Suitable proximity sensors in the form of optical sensors, radar sensors and ultrasonic sensors are known and available from the prior art. Optical monitoring systems, in particular light barriers, infrared sensors or laser barriers, which are placed at a distance from the display device and allow the detection of an approaching athlete on the display device, can also be used. By placing several such light barriers and lasers, it is also possible to draw conclusions about the speed of the approach. Finally, detection systems can also be used which, for example, provide a detectable element for placement on the athlete's body or clothing. For example, RFID sensors on the sportswear can detect the approach of the athlete with a corresponding detection device on the display device. Such a system also allows a certain selectivity, since, for example, the Approaching other objects (birds, files, balls, etc.) does not lead to false alarms.

The control device causes the drive means to be activated selectively, if necessary, that is to say not necessarily in every case in which any approach of a person to the display device is detected. Rather, depending on the detected type and quantification of the approach in terms of proximity and speed, the control device can provide control of the drive means only for cases of approach that meet predetermined criteria. For example, if a person approaches with a trajectory that does not approach the display device or approaches it very diagonally, the actuation of the drive means can be dispensed with, since there is no significant risk of injury.

In order to implement such a function, the recognition of different criteria with regard to the approaches of people is used. The availability of measured values for approximation and thus the ability to test criteria for the type of approximation depends largely on the detection device used.

Another possibility for detecting proximity consists in the use of camera systems that are separate from or integrated in the display device, in particular camera systems that allow spatial detection. For this purpose, 3D cameras are known which, for example, can be used as time-of-flight cameras for monitoring traffic in motor vehicles to detect approaches. Such a system can be placed on or next to the display device and continuously detects the approach of people to the display device, as well as their speed.

Furthermore, external triangulating camera systems can also be used as the detection device for the display device, as they are already used at sporting events be used anyway. A known system in this regard is the system with the brand name Hawk-Eye from the company Hawk-Eye Innovations Ltd., which monitors the movement of objects in the playing field area with great precision using a plurality of cameras, downstream image recognition and triangulation based on known camera positions. If such a system is fed with the position data of a display device, when a person approaches the display device, the corresponding control device can be supplied with a control signal in a wireless or wired manner, so that it activates the drive means accordingly in order to defuse the display device in question as a risk of injury. In this case, the detection device is formed by a complex external system and is thus used as part of the display device.

If it was necessary to bring the display carrier into the folded position, i.e. after the drive means have been activated and a movement into the folded position has taken place, the drive means can cause the display carrier to be erected again and moved into the display position and in this display position is held. The point in time of resetting can be made dependent on data from the detection device, e.g. when it is detected that there is no longer any person in the area of the display device. Alternatively, the drive means can also reset the device after a predetermined period of time or in response to a control signal. For resetting, the control device causes the drive means to be activated, as a result of which the display support is erected into the display position (by an active drive or the release of the pretensioned components).

In addition, a deformable web material, for example in the form of a textile web or tarpaulin or film, can be attached between the display carrier and the stand device in such a way that it is on the the side of the display carrier facing away from the image display is placed. If this web material is attached to the stand device and the display carrier, it can be tensioned when the display carrier moves into the display position and is folded into the folded position when the display carrier moves. This web material can also be provided with advertising messages or information and can also be backlit.

In addition to the advantages of reducing the risk of injury, the display device according to the invention offers numerous advantages. It can be installed in a simple and modular manner in the area of sports facilities, is mobile and can be controlled in a variety of ways. Any desired display devices, but in particular LED panels, can be used as the electronic display device. Several of the display devices can be coupled with regard to their displayed content. In particular, the electronic image displays can contain independent receiving parts that show external data on the display. Alternatively, a central playback device or receiving device for signal data can be present in each display device.

The corresponding display devices can be supplied with electricity via central power supply units, power supply units assigned separately to each display, or power storage units or generators.

In a preferred embodiment of the invention, the display carrier is articulated to the stand device along a common axis of rotation.

Such a coupling is mechanically robust and requires little maintenance. The display support and stand device can assume a lying V-shape with respect to one another in the display position, while they are pivoted or folded in the folded position on one another or one inside the other. The drive can be coupled to a shaft in the axis of rotation in order to adjust the display carrier. Alternatively, the display carrier can be coupled to the drive means by threaded rods or articulated supports, so that the pivoting movement of the display carrier with respect to the stand device is brought about by forces which are not applied to the axis of rotation. Then the drive means effect a change in position and a pivoting movement by adjusting the support means.

It is particularly preferred if the display carrier is coupled to the stand device in such a way that the display carrier can be adjusted by the drive means relative to the stand device along a movement path, the display carrier performing a pivoting movement with a translational movement component.

Compared to a pure pivoting movement through exclusive rotary coupling of the display carrier and the stand device, a combined translatory-rotary movement offers further advantages. When moving into the display position, the display carrier can lift off from the stand device, for example, in relation to the folded position, in order to be raised above it in the display position. In this case, the lower limit of the display carrier is not restricted in terms of its location to an axis of rotation on the display carrier and the stand device, but rather it can be at a distance from the display carrier. The display area arranged on the display carrier is thus also raised. If, for example, the stand device is inserted into an associated recess in the floor, the display carrier rises clearly above the floor in the display position, but is lowered onto the sunk stand device in the folded position to further reduce the risk of injury.

In a particularly preferred embodiment of the invention, the display carrier is coupled to the stand device via an articulated linkage. Articulated linkages allow the realization of movement paths that contain both rotational and translational components. Several rods or a single rod can be used to couple the display carrier and the dispenser device and to guide them in their relative movement to one another. The drive means can be coupled to the articulated linkage itself, so that the adjusting force is also transmitted via the articulated linkage. Alternatively, the articulated linkage is used exclusively for guiding the movement, while the actual drive, similar to the manner already discussed, separately, for example, via support points, effects an adjustment between the display carrier and the stand device.

In a preferred embodiment of the invention, the detection device has an optical sensor or a radar sensor which detects the approach of a person to the display device.

Optical sensors, in particular in the form of camera sensors with pixel arrays, allow complex evaluation via downstream image recognition and processing. These systems can, for example, determine the type of an approaching object more precisely, for example using a pattern recognition with a neural network. The activation of the drive depending on the type of the approaching object then allows differentiated activation - e.g. when a game device (e.g. ball) approaches, an adjustment to the folded position can be omitted, but an adjustment can be initiated when a person approaches. Radar sensors are particularly robust, tried and tested and inexpensive when it comes to detecting proximity. These can be used pre-configured and also allow the approach speed of a person or an object to be recorded. Examples of suitable radar sensors are those from the manufacturer InnoSenT (e.g. 3D-MIMO-RADAR, type iSYS-5020 or called iSYS-4001). Combinations of such detection devices, that is to say combined radar detections and optical or other proximity detections, can also be used.

The data from the sensor devices can be transferred to the control device either as raw data or as data preprocessed by software. The reactions to be derived from the data and the control commands to be generated for the drive means are determined empirically, depending on the field of application, the sensor arrangement and the size and responsiveness of the display device.

It is advantageous if the detection device detects both a direction of movement and a speed.

The control of the drive means can then be selected as a function of the detected approach by the control device. Depending on the speed and / or the direction of the approach, metered activation can take place in order to reduce the risk of injury and, on the other hand, to enable the display device to be gentle on the material. In order to avoid unnecessary folding movements and thus to reduce the effect of the display device, it can be provided that the holding effect of the display carrier is only canceled when a certain approach speed is exceeded. This ensures that the advertising effect and display effect of the display device is only canceled in those situations in which there is actually a risk of injury to a person. For example, when detecting the approach of an athlete, it can be determined whether he is approaching the display device at high speed or at low speed (with a high speed being, for example, more than 10 km / h). When approaching at high speed, the control device causes the stopping effect to be canceled. In a preferred development of the invention, folding means are provided which are arranged between the display carrier and the stand device and which pretension the display carrier for movement in the direction of the folded position.

In this embodiment, the folding movement or evasive movement of the display support is supported by the folding means. As soon as the control device cancels the action of the drive means in response to an approach, ie releases the locking of the display carrier in the display position, the folding means act and pull or pivot the display carrier in the direction of the folded position. In this way, an active evasive movement of the display carrier is effected. The folding means can have tensioning elements, for example spiral springs or torsion springs. In such a case, the display carrier is pretensioned in the display position in the direction of the folded position, but is prevented from moving by the drive means. As soon as the drive means are released, the display carrier moves into the folded position. The drive means can then tension the folding means again by pivoting the display carrier back into the display position, where the drive means are activated again by the control device. It is also possible that the drive means also drive during the movement into the folded position, so that the folding means accelerate the movement in addition to the drive means.

In a preferred embodiment of the invention, the detection device is arranged on the display device itself.

As mentioned above, numerous different devices can be used as detection devices. When the detection device is arranged on the display device itself, a highly modular and compact system is created, since the detection device can always be transported together with the display device and it has a fixed spatial relationship to the display device. When compact systems for proximity detection come into consideration here, the aforementioned sensors, in particular camera systems, ultrasonic sensors, radar sensors or even capacitive sensors.

It is particularly preferred if the drive means have releasable mechanical latching means which latch the display carrier in relation to the stand device in the display position.

The use of lockable drive means has the advantage that no continuous control or maintenance of a circuit or an energy supply is required to maintain the holding effect. The locking means are only activated to cancel the holding effect and a mechanical locking effect is canceled by releasing the locking, for example by means of electromagnetic actuators. If, on the other hand, the drive means have sufficient friction and motor braking effect in the de-energized state, the locking means can also be dispensed with or be formed by the gearbox and the motor itself, since they then hold the display carrier in the display position without additional means.

In another embodiment of the invention, a spring is arranged on the display device which urges the display carrier from the direction of the folded position into the display position.

In a preferred embodiment of the display device according to the invention it is also provided that the control device has a receiving device via which wireless control signals can be received from an external detection device and wherein the control device cancels the effect of the drive means as a function of the control signals.

In such a configuration, as already indicated above, a central optical monitoring system can be used which forwards control signals to one or more display devices according to the invention. An elaborate optical Acquisition and evaluation can then take place in a centralized manner and the control device in the display devices themselves can be constructed relatively simply, namely by receiving and converting a control signal without being burdened by the complex evaluation.

The invention will now be explained with reference to the accompanying drawing.

Figure la shows a display device according to a first embodiment in a front view in the display position;

Figure lb shows the display device from Figure la in an oblique view from the front;

FIG. 2 shows the display device from FIGS. La and lb in an oblique view from behind with an enlarged detail;

FIG. 3a shows the display device according to the first embodiment in a side view with an enlarged detail, the display carrier being in a display position;

FIG. 3b shows the arrangement from FIG. 3a, the display carrier being in a folded position;

FIG. 4a shows a display device according to a second embodiment in an oblique view from behind;

FIG. 4b shows the display device according to the second embodiment in a view from the front;

FIG. 4c shows the display device according to the second embodiment in a view from the side;

FIG. 4d shows the display device according to the second embodiment in a view from the rear;

FIG. 4e shows parts of the display device according to the second embodiment in an oblique view from the rear;

FIG. 4f shows details of the view from FIG. 4e;

FIG. 4g shows the display device according to the second embodiment in the folded position;

Figure 5 shows schematically the signal coupling of components of the invention; In the figures la and lb a display device 1 is shown. The display device has a display support 2 which provides a support frame and a mounting surface for a plurality of electronic display panels 3. A stand device 4 is arranged below the display carrier 2. In this example, this is designed to rest on the ground with a tub construction with a circumferential edge and is pivotably coupled to the display carrier 2. A detection device 5 in the form of a radar sensor is arranged on the display carrier 2. The display support 2 has a circumferential rubber padding in order to protect both the attached display panels 3 and people who come into contact with the display support 2.

Figure 2 shows a rear view of the display device 1. In this illustration, the pivot connection between the display support 2 and

Stand device 4 visible. Rotary bearings 6 are arranged on the stand device 4. A shaft 7 is coupled to these rotary bearings, which in turn is connected non-rotatably to corresponding fastening points on the display carrier 2. The display carrier 2 and the stand device 4 are therefore coupled to one another in an axis of rotation.

The drive means have a plurality of belts 8 which are coupled to electric motors 9 which are arranged on the stand device 4. The belts 8 drive gear wheels 11 coupled to the shaft 7 in order to pivot the display carrier 2 against the stand device 4. All components that act from the generation of force to the introduction of force, i.e. in particular the motors 9, the belts 8 as well as the gear wheels 11 and the shaft 7, are to be considered as drive means.

A control device 10 is coupled on the stand device 4 to both the drives 9 and the detection device 5. A lockable drive lock in the area of the Drives 9 act as controllable holding means 14 which lock the display carrier in the display position. The lock can act on a gear, the belt or even on the motor itself - it is also possible that the de-energized motor itself develops the locking effect. Even with currentless drives 9, the display carrier is held in the display position in this way. As part of the drive means, the lock is preferably designed in such a way that it engages when the display position is reached and can be released by energizing it, initiated by the control device 10. The drive means can transfer the display carrier from the folded position into the display position.

A plurality of spiral springs 15 are coupled between them to pretension the display carrier in the direction of the stand device 4. If the action of the drive means 14 is canceled, spiral springs 15 support the movement of the display support into the folded-in position.

In the figures la, lb, 2, the display carrier is shown in the display position. The display support 2 is largely upright compared to the stand device 4, so that when viewed from the front (see FIG. A side view is shown in FIG. 3a, the display carrier 2 being in the display position and this end position of the display carrier being limited by a lower stop 4a of the stand device. The angle between the display carrier 2 and the stand device 4 is chosen so that the display elements 3 are clearly visible.

In FIG. 3 b it is shown that the display carrier 2 is transferred into a folded position in which it is largely pivoted into a parallel position with respect to the stand device 4. In this position, the risk of injury to an athlete from impact with the display device is greatly reduced. When using the display device, the display support 2 is most of the time in the display position, as shown in Figures la, lb, 2 and 3a. In this position the panels 3 show information or advertising messages. For this purpose, the panels are coupled with corresponding display control units or have these integrated. Since this recording of information on electronic image displays is known and is not the subject of the invention, further description in this regard is dispensed with.

The detection device 5 supplies sensor information on approaches in the area in front of the display device 1. For this purpose, the detection device is directed in the direction of the display effect, that is, the radiation direction of the panels 3, which is usually the playing field in the sports area. If an approach of a person is detected by the detection device 5, the control device 10 evaluates whether it is an approach that involves a potential risk of injury for the approaching person. This is particularly the case when the approach is taking place at a significant speed.

If this is the case, the control device 10 controls the motors 9 and the lockable locks 14. The drives 9 drive the rotation of the shaft 7 via the belt 8. Supported by the force of the spiral springs 15, a rapid pivoting movement of the display carrier 2 together with the panels attached to it is brought about into the folded position, as shown in FIG. 3b. The display carrier 2 is thus moved into a position in which the risk of injury from the display device is significantly reduced. Alternatively, the control device 10 can cause a coupling (not shown) to be released so that the drive means are decoupled from the display carrier and the display carrier pivots or folds into the folded position due to the force of gravity and the action of the spiral springs 15. After a predetermined period of time or in response to a control signal from the outside, the control device 10 controls the motors 9 of the drive means in order to bring about the return of the display carrier 2 from the folded position (see Figure 3b) back into the display position (see Figure 3a). For this purpose, the belts are driven in the opposite direction and the spiral springs 15 are tensioned by the movement.

Figures 4a to 4f show a second embodiment of the invention. In this second exemplary embodiment, the display carrier 22 and stand device 24 are coupled via an articulated linkage 30, which guides the display carrier 22 with respect to the stand device 24 along a movement path both translationally and rotationally.

The display carrier 22 is designed as a frame construction into which an electronic display 23 is inserted (which in turn can be formed from several modules). A radar sensor 25 is placed in the upper area of the frame and in a recess of the display 23. This records objects and approaches in the area in front of the display device.

The drive means have an electric motor 29, a transmission gear 31 and the articulated linkage 30 already mentioned. The motor 29 and the gear 31 are accommodated in a watertight housing 32 which is formed centrally on the stand device 24. The housing is shown open in this illustration for better viewing, but it can be locked. A control device 35 is also received in the housing 32. The control device 35 is coupled to the radar sensor 25 for signal transmission, it being possible for this coupling to be wired or wireless. Further components, e.g. power supplies, etc., are placed in a likewise watertight compartment 40, which is formed on one side in the stand device 24.

As shown in Fig. 4c, the display support 22 is opposite the stand device 24 by the two-sided coupled Articulated stands 30 raised and slightly inclined in the display position shown. The articulated linkage is designed to lift the display carrier out of the stand device 24 in a rotational, translational movement without play and to erect it and, on the other hand, to lower it back into the folded position in the stand device 24. For this purpose, the gear 31 is non-rotatably connected to a lever of the articulated linkage. The structure of the articulated linkage and its coupling sections for fastening the display carrier 22 can be seen in particular in FIGS. 4d, 4e and 4f. The degrees of freedom of movement are restricted by fixing at several points on the display carrier 22 and the stand device 24 in such a way that the same movement path is always followed when the display carrier is erected and folded. In this exemplary embodiment, not only is the movement guided by the articulated linkage 30, but the adjustment force is also transmitted via this articulated linkage 30.

The non-rotatable coupling of a shaft 31a of the transmission 31 with the articulated linkage 30 is shown in FIG. 4f. The gear 30 is designed as a transmission gear with toothed wheels and reduces the force to be applied by the electric motor 29. The motor 29 is a high-speed motor with a short reaction time, as it is also used as an adjusting drive in CNC machines. An angle sensor 31b, which in turn is coupled to the control device 35, is also arranged on the transmission. In this way, a precise approach to a desired position of the display carrier relative to the stand device is possible.

In this embodiment, every change in position takes place under a drive, both the erection of the display carrier from the folded position and the return to the folded position are effected by the control device under the control of the drive means. In cooperation of the control device 35 and the angle sensor 31b, any position between the fully folded position and he fully extended display position can be set and held.

In Fig. 4g, the folded position of the display carrier 22 of the display device 21 is shown. In this view, the display support 22 is shown transparent and with broken lines in order to show the underlying components. The articulated linkage 30 has been adjusted under the action of the motor 29 in such a way that the display carrier 22 rests on the stand device 24. In this design, the display device 21 is compact and easy to transport and does not offer any vertical collision surface for people in the vicinity. In particular, if the display device is completely embedded in a receptacle in the subsurface, the upper side of the display carrier and the display 23 located thereon can be lowered flush with the subsurface or even with respect to the subsurface. When erecting in the display position (see Figure 4c), the display carrier then rises above the ground and is clearly visible.

Fig. 5 shows schematically the coupling of the components of the invention. A detection device 40 supplies signals relating to approaches to the display device to the coupled control device 45 Direction of the display position as well as, when approaching is detected, a movement into the folded position can be. To control the end position and as an input variable into the control device, a position sensor 55 can be provided, which is coupled to the gear of the drive means 50, for example.

Furthermore, operating means 60, for example in the form of a mobile device or computer with a software application or some other manual switching arrangement, can be provided. Herewith the control device 45 can be configured or specific control commands can be issued, for example to activate the display device or to move it into the folded position in order to be able to transport the display device. The control device can provide a wired or wireless interface for control.

Claims

1. Display device (1; 21) with at least one image display (3; 23), the image display (3; 23) being arranged on a display carrier (2; 22), the display carrier (2; 22) having a stand device (4 ; 24), which is designed to rest on or attach to a substrate, characterized in that the display carrier (2; 22) is adjustably coupled to the stand device (4; 24), the display carrier (2; 22) opposite of the stand device (4; 24) is adjustable between a folded position and a display position, with drive means (7, 8, 9; 29, 30, 31, 31a; 50) acting between the display carrier (2; 22) and the stand device (4; 24 ) are coupled to adjust the display carrier between the folded position and the display position, wherein a control device (10; 35; 45) is coupled to the drive means (7, 8, 9; 29, 30, 31, 31a), wherein the control device (10) is coupled to a detection device (5; 25; 40) which has a proximity ng a person to the display device (1; 21) and wherein the control device (10; 35; 45) controls the drive means (7, 8, 9; 29, 30, 31; 50) as a function of a detected approach.

2. Display carrier according to claim 1, wherein the image display (3; 23) has an electronic display.

3. Display device according to claim 1 or 2, wherein the display support (2) is articulated to the stand device along an axis of rotation.

4. Display device according to claim 1 or 2, wherein the display carrier (22) is coupled to the stand device in such a way that the display carrier is adjustable by the drive means relative to the stand device along a movement path, the display carrier performing a pivoting movement with a translational movement component.

5. Display support according to claim 4, wherein a joint linkage (30) is formed as part of the drive means (29, 30, 31, 31a) for coupling the display support (22) and the stand device.

6. Display support according to claim 5, wherein the articulated linkage (30) is coupled to the further drive means (29, 31) via a shaft (31a).

7. Display carrier according to one of the preceding claims, wherein the drive means (29, 30, 31, 31a) have a transmission gear (31).

8. Display device according to one of the preceding claims, wherein the detection device (5; 25) is arranged on the display device (1; 21), in particular the display carrier (2; 22).

9. Display device according to claim 8, wherein the detection device comprises an optical sensor or a radar sensor (25) which detects the approach of a person to the display device.

10. The display device according to claim 9, wherein the detection device detects both a direction of movement and a speed.

11. Display device according to one of the preceding claims, wherein at least one mechanical spring is coupled between the display support and the stand device, which urges the display support either in the direction of the folded position or in the direction of the display position.

12. Display device according to one of the preceding claims, wherein the control device is designed to control the drive means as a function of a detected approach speed of a person to the display device.

13. Display device according to one of the preceding claims, wherein the control device is designed to control the drive means as a function of a detected distance of a person to the display device.

14. Display device according to one of the preceding claims, wherein the control device is a

Receiving device, via which control signals from an external detection device can be received, wherein the control device controls the drive means as a function of the received control signals.