DE102018124452B4 - Device for monitoring a lateral environment of a multi-touch screen and method for operating a multi-touch screen - Google Patents

Abstract

Device (6) for monitoring a lateral environment of a multi-touch screen (2) with a horizontally oriented touch surface (5), characterized by at least one 360-degree laser scanning unit (7) with a horizontally oriented scanning plane (8) that can be arranged on the bottom below the multi-touch screen (2).

Description

Technical field

The invention relates to a device for monitoring a lateral environment of a multi-touch screen with a horizontally oriented touch surface. Furthermore, the invention relates to a method for operating a multi-touch screen.

State of the art

A multi-touch screen can, for example, use a capacitive or optoelectric sensor device to simultaneously detect multiple touches in different screen areas and/or gestures from multiple people operating the multi-touch screen. This allows the multi-touch screen to display different information for different people, which can be accessed by each person using the multi-touch screen.

CN 101 945 228 A discloses a table-top liquid crystal display that realizes multi-identification, comprising a liquid crystal display, a transparent mesh layer on a bottom surface of the liquid crystal display, a semitransparent optical microsphere diffusion membrane, an LED optical array module, an LCD driving device, an optical array box, a transparent touch surface, and a multi-human-machine interaction identification device. Upper and lower optical transmission array spaces are established between the surface of the liquid crystal display and the LED array module. A surface human-machine interaction device realizes the identification of infrared images and biological characteristics of the human body by applying the upper and lower optical transmission array spaces. The optical transmission array space is used to realize multi-touch and surface identification of a human-machine interaction operation and multi-identification of bidirectional short-range wireless communication.

WO 2013 / 056 157 A1 discloses a multi-touch screen table with a plurality of environmental sensors arranged on a frame surrounding a multi-touch screen. This allows the multi-touch screen table to detect a person's position relative to the multi-touch screen table and take this into account when displaying information.

WO 2014 / 125 272 A1 discloses a multi-touch installation in which a touch screen surface is scanned using a laser scanner to determine the position of a touch screen input.

The publication “ User detection for a multi-touch table via proximity sensors", WALTHER-FRANKS, B. [et. al.], Proceedings of the IEEE Tabletops and Interactive Surfaces, 2008 discloses a device for monitoring the lateral environment of a table with a multi-touch screen with a horizontally oriented touch surface. The device has a row of proximity sensors in the form of infrared sensors extending around the table.

US 2013 / 0 093 708 A1 discloses a proximity-sensitive multi-touch tabletop comprising both a touchscreen display and a plurality of proximity sensors. The proximity sensors are arranged in one or more ring-shaped groups around the touchscreen display.

Disclosure of the invention

An object of the invention is to improve the operation of a multi-touch screen and a multi-touch device equipped therewith.

This object is achieved by the independent patent claims. Advantageous embodiments are recited in the dependent patent claims, the following description, and the figures, wherein these embodiments, each taken individually or in combination of at least two of these embodiments, may represent an advantageous or preferred development of the invention. Preferred embodiments of the device may correspond to preferred embodiments of the multi-touch device and/or the method, and vice versa, even if this is not explicitly referred to in the individual case below.

A device according to the invention for monitoring a lateral environment of a multi-touch screen with a horizontally oriented touch surface has at least one 360-degree laser scanning unit with a horizontally oriented scanning plane that can be arranged on the bottom below the multi-touch screen.

According to the invention, the environment of the multi-touch screen with horizontally aligned touch surface can be scanned by means of the 360-degree laser scanning unit, in particular for the presence of persons in the lateral environment of the The multi-touch screen can be monitored to operate the multi-touch screen taking into account the presence of one or more people in the vicinity of the multi-touch screen. This allows the multi-touch screen to display information in a personalized and geographically separated manner.

Scan data from the 360-degree laser scanning unit can, for example, be used to assign a touch of the multi-touch screen detected capacitively, optoelectrically, resistively, inductively or by means of another sensor technology and/or a correspondingly detected gesture performed in the area of the multi-touch screen to a specific person standing next to the multi-touch device or to the position of the person relative to the multi-touch screen, for example to display information in an edge area of the multi-touch screen closest to the person and/or to display this information in such a way that the person sees an image and/or text upright and not upside down.

Furthermore, by assigning a touch or gesture to a specific person next to the multi-touch screen, reliable operation of the multi-touch screen can be realized for multiple people located at different locations next to the multi-touch screen, for example, on opposite sides of the multi-touch screen, since this assignment prevents a touch or gesture from one person from being assigned to another, and thus incorrect, person. Overall, the multi-touch screen of the multi-touch device according to the invention is therefore improved compared to the operation of a conventional multi-touch screen.

The 360-degree laser scanner can seamlessly capture the lateral surroundings and, compared to conventional technologies, can be arranged as a single unit in the area of the multi-touch screen, saving space. The 360-degree laser scanning unit is preferably concealed at the bottom below the multi-touch screen, so that a person approaching the multi-touch screen cannot see the 360-degree laser scanning unit. The 360-degree laser scanning unit can, for example, comprise a lidar system.

According to an advantageous embodiment, the 360-degree laser scanning unit is configured to generate individual angle-dependent distance values for objects located in the lateral vicinity of the multi-touch screen. The 360-degree laser scanning unit can therefore generate and output at least one angle-dependent distance value for each object in the lateral vicinity of the multi-touch screen. The 360-degree laser scanning unit can be configured to check whether an angle-dependent distance value is smaller than a predetermined minimum distance value and to output as scan data only those angle-dependent distance values that are smaller than the predetermined minimum distance value. An angle-dependent distance value provides an angle in the scan plane and thus the angular position of an object located laterally next to the multi-touch screen relative to the multi-touch screen and, at the same time, the distance of the object to the multi-touch screen.

According to a further advantageous embodiment, the device has at least one monitoring electronics unit connected to the 360-degree laser scanning unit, wherein the monitoring electronics unit is configured to assign an angle-dependent distance value either to an immobile object below or next to the multi-touch screen or to a person next to the multi-touch screen. The device is thereby configured to distinguish between immobile objects and people in order to avoid incorrectly controlling the multi-touch screen based on objects, but exclusively based on people. An immobile object below or next to the multi-touch screen can be an immobile component of a support unit supporting the multi-touch screen on the floor, or an immobile object independent of the multi-touch screen or a device equipped with it, for example, a table leg, a wall, a column, or the like. The distinction between the immobile objects and people can be reliably made using software executed by the monitoring electronics unit. The 360-degree laser scanning unit can be connected or connectable to a monitoring electronics system either wired or wirelessly. The screen electronics can be configured to operate the multi-touch screen or output image signals depending on signals from the monitoring electronics in such a way that the multi-touch screen is operated solely based on an angle-dependent distance value assigned to a person to the side of the multi-touch screen.

The monitoring electronics can also be configured to determine from scan data of the 360-degree laser scanning unit whether a person is near the multi-touch screen and/or whether a person is approaching the multi-touch screen. If the person is in lateral If the distance to the multi-touch screen is less than or equal to a predefined distance value, the multi-touch screen can be operated, for example, to display information for the person, for example to arouse the person's interest. The monitoring electronics can, for example, be configured to monitor or determine the person's current lateral distance, compare the determined current lateral distance with the predefined distance value, and output a control signal to the screen electronics of the multi-touch screen if the monitoring electronics determines that the person's current lateral distance is less than or equal to the predefined distance value.

According to a further advantageous embodiment, the monitoring electronics are configured to determine a person's position relative to the multi-touch screen from a plurality of angle-dependent distance values assigned to a person located to the side of the multi-touch screen, and to combine the angle-dependent distance values with the determined position of the person to form a data packet. The angle-dependent distance values assigned to a person represent a line scan of the side of the person facing the multi-touch screen. The data packets generated by the monitoring electronics are also referred to as blobs. The data packets can be transferred via a network-based interface to the screen electronics of the multi-touch screen, which can evaluate and process the data packets to display information on the multi-touch screen.

A multi-touch device according to the invention has at least one horizontally oriented multi-touch screen, at least one screen electronics with which the multi-touch screen can be operated, and at least one device connected to the screen electronics according to one of the above-mentioned embodiments or a combination of at least two of these embodiments with one another, wherein the screen electronics is configured to operate the multi-touch screen in dependence on signals from the monitoring electronics.

The multi-touch device offers the advantages mentioned above with regard to the device. The monitoring electronics of the device can be implemented partially or entirely by the screen electronics or can be designed as a separate unit connected to the screen electronics.

The multi-touch screen can have at least one sensor device for detecting a touch or a gesture. The sensor device can implement a conventional detection technology. For example, the sensor device can be resistive, capacitive, inductive, acoustic, optical, optoelectric, or otherwise implemented. A smallest dimension (length or width) of the horizontally oriented touch surface of the multi-touch screen can, for example, be greater than 0.5 m, in particular greater than 1 m.

When a multi-touch device is properly placed on a floor, the scanning plane of the 360-degree laser scanning unit is preferably aligned horizontally so that the 360-degree laser scanning unit scans or captures the lateral surroundings of the multi-touch device or the multi-touch screen.

The screen electronics can be connected to the aforementioned sensor device in order to be able to evaluate or process the sensor signals of the sensor device. In this case, the screen electronics are preferably configured to additionally operate the multi-touch screen at least indirectly depending on the sensor signals of the sensor device. The screen electronics are configured to operate the multi-touch screen indirectly depending on the scan data of the 360-degree laser scanning unit after the monitoring electronics has processed the scan data of the 360-degree laser scanning unit.

According to an advantageous embodiment, the screen electronics are configured to operate the multi-touch screen in dependence on signals from the monitoring electronics in such a way that the multi-touch screen provides an at least abstract and angle-accurate visualization of people located to the side of the multi-touch screen. This allows a lively background to be displayed with the multi-touch screen, which is also advantageous for design and aesthetic reasons.

According to a further advantageous embodiment, the screen electronics are configured to operate the multi-touch screen in dependence on signals from the monitoring electronics such that the orientation of information displayed on the multi-touch screen is dependent on the angular position of a person located to the side of the multi-touch screen. This ensures that the information is displayed upright, i.e., not upside down, to the respective person.

According to a further advantageous embodiment, the screen electronics are configured to operate the multi-touch screen in dependence on signals from the monitoring electronics such that the multi-touch screen generates a greeting message depending on the angular position of a person located to the side of the multi-touch screen when the angle-dependent distance value of this person falls below a predetermined contact distance value. This can arouse the interest of the approaching person at an early stage, effectively luring them closer to the multi-touch device.

According to a further advantageous embodiment, the multi-touch device has at least one support unit that supports the multi-touch screen on the floor and is designed such that the touch surface of the multi-touch screen is aligned horizontally when the multi-touch device is placed on a floor, wherein the 360-degree laser scanning unit is attached to an underside of the multi-touch screen and/or to the support unit. The support unit can be designed such that the multi-touch device has the shape of a table. For example, the support unit can have three or four table legs that support the multi-touch screen. Alternatively, the support unit can be box-shaped and closed off from the floor by the multi-touch screen. The support unit can be height-adjustable to enable the multi-touch screen to be arranged at different heights above the floor. The term “ground” is not to be understood in a restrictive sense within the scope of the invention, but any subsurface can be referred to as ground, be it, for example, a floor of a building or a natural ground outside a building in the open air.

According to a method according to the invention for operating a horizontally oriented multi-touch screen, a lateral environment of the multi-touch screen is scanned by means of a 360-degree laser scanning unit, which generates a scanning plane arranged below the multi-touch screen and aligned parallel to a touch surface of the multi-touch screen, wherein the multi-touch screen is operated at least indirectly as a function of scan data from the 360-degree laser scanning unit.

The method provides the advantages mentioned above with respect to the device or multi-touch device. In particular, the device or multi-touch device can be used according to one of the above-mentioned embodiments or a combination of at least two of these embodiments to carry out the method.

According to an advantageous embodiment, at least one angle-dependent distance value is generated from the scan data for each object located to the side of the multi-touch screen, and the multi-touch screen is operated depending on the angle-dependent distance value if the angle-dependent distance value is smaller than a predetermined minimum distance value. This embodiment provides the advantages mentioned above with reference to the corresponding embodiment of the device.

According to a further advantageous embodiment, an angle-dependent distance value is selectively assigned either to a stationary object below or next to the multi-touch screen or to a person next to the multi-touch screen, and the multi-touch screen is operated solely in dependence on such an angle-dependent distance value, which is assigned to a person next to the multi-touch screen. This embodiment provides the corresponding advantages mentioned above with reference to the corresponding embodiment of the device.

According to a further advantageous embodiment, several angle-dependent distance values are generated for an object located to the side of the multi-touch screen, these angle-dependent distance values are combined into a data packet, and the multi-touch screen is operated depending on the data packet. This embodiment provides the advantages mentioned above with reference to the corresponding embodiment of the device.

According to a further advantageous embodiment, the multi-touch screen is operated at least indirectly as a function of scan data from the 360-degree laser scanning unit, such that the multi-touch screen provides an at least abstract and angle-accurate visualization of people located to the side of the multi-touch screen. This embodiment provides the advantages mentioned above with reference to the corresponding embodiment of the device.

According to a further advantageous embodiment, the multi-touch screen is operated at least indirectly in dependence on scan data of the 360-degree laser scanning unit, such that an alignment of information displayed with the multi-touch screen is determined in dependence on an angular position of a sensor arranged laterally next to the multi-touch screen. The person in front of the screen is monitored. This design provides the advantages mentioned above with reference to the corresponding design of the device.

According to a further advantageous embodiment, the multi-touch screen is operated at least indirectly as a function of scan data from the 360-degree laser scanning unit, such that the multi-touch screen generates a greeting message depending on the angular position of a person located to the side of the multi-touch screen when the angle-dependent distance value of this person falls below a predetermined contact distance value. This embodiment provides the advantages mentioned above with reference to the corresponding embodiment of the device.

In the following, the invention is explained by way of example with reference to the attached figures using preferred embodiments, wherein the features explained below can represent an advantageous or preferred development of the invention both individually and in combination of at least two of these features with one another.

Short description of the characters

• 1 shows a schematic side view of an embodiment of a multi-touch device according to the invention.
• 2 shows a schematic side view of another embodiment of a multi-touch device according to the invention.
• 3 shows a schematic plan view of another embodiment of a multi-touch device according to the invention in an initial state.
• 4 shows a schematic plan view of the 3 shown multi-touch device in a welcome state.
• 5 shows a schematic plan view of another embodiment of a multi-touch device according to the invention in a display state.
• 6 shows a schematic plan view of the 5 shown multi-touch device in another display state.

Detailed description of the characters

In the figures, identical or functionally identical components are provided with the same reference numerals. A repeated description of such components may be omitted.

1 shows a schematic side view of an embodiment of a multi-touch device 1 according to the invention with a multi-touch screen 2 and screen electronics 3 integrated into the multi-touch screen 2, with which the multi-touch screen 2 can be operated.

Furthermore, the multi-touch device 1 has a box-shaped support unit 4 that supports the multi-touch screen 2 on the floor. The support unit 4 is designed such that a touch surface 5 of the multi-touch screen 2 is aligned horizontally when the multi-touch device 1 is placed on a floor (not shown), as shown in 1 is shown. The support unit 4 has a box-shaped body 10 and four feet 11 arranged on the bottom thereof.

In addition, the multi-touch device 1 has a device 6 connected to the screen electronics 3 for monitoring a lateral environment of the multi-touch screen 2. The screen electronics 3 is configured to operate the multi-touch screen 2 in response to signals from the device 6.

The device 6 has a 360-degree laser scanning unit 7 arranged on the bottom below the multi-touch screen 2 with a horizontally aligned scanning plane 8. The 360-degree laser scanning unit 7 is attached to a bottom side 9 of the box-shaped body 10 of the support unit 4. The 360-degree laser scanning unit 7 is configured to generate individual angle-dependent distance values to objects located in the lateral vicinity of the multi-touch screen 2, wherein 1 there is no object in the lateral area of the multi-touch screen 2.

The device 6 also has monitoring electronics 12 connected to the 360-degree laser scanning unit 7. The monitoring electronics 12 are configured to assign an angle-dependent distance value either to a stationary object below or next to the multi-touch screen 2 or to a person next to the multi-touch screen 2. Furthermore, the monitoring electronics 12 can be configured to determine a position of the person relative to the multi-touch screen 2 from several angle-dependent distance values assigned to a person located to the side of the multi-touch screen 2 and to combine the angle-dependent distance values with the determined position of the person into a data packet.

The screen electronics 3 are configured to control the multi-touch screen 2 depending on Signals from the monitoring electronics 12. The screen electronics 3 are configured to operate the multi-touch screen 2 in dependence on signals from the monitoring electronics 12 such that the multi-touch screen 2 is operated solely in dependence on angle-dependent distance values assigned to persons to the side of the multi-touch screen 2.

The screen electronics 3 can be configured to operate the multi-touch screen 2 in dependence on signals from the monitoring electronics 12 such that the multi-touch screen 2 provides at least an abstract and angle-accurate visualization of persons located to the side of the multi-touch screen 2.

In addition, the screen electronics 3 can be configured to operate the multi-touch screen 2 in dependence on signals from the monitoring electronics 12 such that an alignment of information displayed on the multi-touch screen 2 is carried out in dependence on an angular position of a person located laterally next to the multi-touch screen 2, as is the case, for example, in the 3 to 6 shown embodiments.

Furthermore, the screen electronics 3 can be configured to operate the multi-touch screen 2 in dependence on signals from the monitoring electronics 12 such that a greeting message is generated with the multi-touch screen 2 depending on the angular position of a person located to the side of the multi-touch screen 2, if the angle-dependent distance value of this person falls below a predetermined contact distance value. This is the case, for example, in the 3 and 4 shown embodiment.

2 shows a schematic side view of a further embodiment of a multi-touch device 13 according to the invention. The multi-touch device 13 differs from the one shown in 1 In the embodiment shown, the support unit 14 is designed as a table, the table top of which is partially formed by the multi-touch screen 2, which is supported on the floor by four table legs 15 of the support unit 14. In addition, the 360-degree laser scanning unit 7 and the monitoring electronics 12 of the device 6 are attached to an underside 16 of the multi-touch screen 2. To avoid repetition, reference is made to the above description. 1 referred to.

3 shows a schematic top view of another embodiment of a multi-touch device 17 according to the invention in an initial state. In the initial state shown, the multi-touch screen 2 can, for example, display nothing or a static display. The multi-touch device 17 can, according to the 1 or in 2 To avoid repetition, reference is made to the above description. 1 or 2 referred to.

4 shows a schematic plan view of the 3 shown multi-touch device 17 in a welcome state. The multi-touch device 17 is different from the one shown in 3 shown initial state into the welcome state, since it has been determined by means of the device 6 or the 360-degree laser scanning unit 7 and the monitoring electronics 12 that a person 18 is located in the lateral vicinity of the multi-touch screen 2.

The screen electronics 3 are configured to operate the multi-touch screen 2 in dependence on signals from the monitoring electronics 12 such that an alignment of a greeting information 19 displayed on the multi-touch screen 2 is dependent on an angular position of the person 18 located laterally next to the multi-touch screen 2. Furthermore, the screen electronics 3 are configured to operate the multi-touch screen 2 in dependence on signals from the monitoring electronics 12 such that the greeting information 19 is generated when the angle-dependent distance value of the person 18 falls below a predetermined contact distance value.

5 shows a schematic plan view of another embodiment of a multi-touch device 20 according to the invention in a display state. In the display state shown, the multi-touch screen 2 displays information 21. The multi-touch device 20 can be configured according to the 1 or in 2 To avoid repetition, reference is made to the above description. 1 or 2 referred to.

The screen electronics 3 are configured to operate the multi-touch screen 2 in dependence on signals from the monitoring electronics 12 such that an alignment of the information 21 displayed on the multi-touch screen 2 takes place in dependence on an angular position of a person 18 located laterally next to the multi-touch screen 2, so that the information 21 is displayed upright for the person 18.

6 shows a schematic plan view of the 5 shown multi-touch device 20 in another display state. Since a person 18 is in 6 on the other or opposite side of the multi-touch screen 2, the information 21 is compared to 5 displayed upside down to show the information 21 upright to the person 18.

List of reference symbols

1

Multi-touch device

2

Multi-touch screen

3

Screen electronics

4

carrying unit

5

Touch surface of 2

6

device

7

360-degree laser scanning unit

8

Scan level

9

Bottom of 10

10

Body of 4

11

Feet of 4

12

Monitoring electronics

13

Multi-touch device

14

carrying unit

15

Table leg of 14

16

Bottom of 2

17

Multi-touch device

18

person

19

Welcome information

20

Multi-touch device

21

information

Claims (16)

Device (6) for monitoring a lateral environment of a multi-touch screen (2) with a horizontally oriented touch surface (5), characterized by at least one 360-degree laser scanning unit (7) with a horizontally oriented scanning plane (8) that can be arranged on the bottom below the multi-touch screen (2). Device (6) according to Claim 1 , characterized in that the 360-degree laser scanning unit (7) is configured to generate individual angle-dependent distance values to objects located in the lateral environment of the multi-touch screen (2). Device (6) according to Claim 1 or 2 , characterized by at least one monitoring electronics unit (12) connected to the 360-degree laser scanning unit (7), wherein the monitoring electronics unit (12) is configured to assign an angle-dependent distance value selectively either to an immobile object below or next to the multi-touch screen (2) or to a person (18) next to the multi-touch screen (2). Device (6) according to Claim 2 or 3 , characterized in that the monitoring electronics (12) are designed to determine a position of the person (18) relative to the multi-touch screen (2) from a plurality of angle-dependent distance values assigned to a person (18) located laterally next to the multi-touch screen (2) and to combine the angle-dependent distance values with the determined position of the person (18) to form a data packet. Multi-touch device (1, 13, 17, 20) with at least one horizontally aligned multi-touch screen (2) and at least one screen electronics (3) with which the multi-touch screen (2) can be operated, characterized by at least one device (6) connected to the screen electronics (3) according to one of the Claims 1 until 4 , wherein the screen electronics (3) are arranged to operate the multi-touch screen (2) in dependence on signals from the monitoring electronics (12). Multi-touch device (1, 13, 17, 20) to Claim 5 , characterized in that the screen electronics (3) are designed to operate the multi-touch screen (2) in such a way as to depend on signals from the monitoring electronics (12) that the multi-touch screen (2) provides an at least abstract and angle-accurate visualization of persons (18) located to the side of the multi-touch screen (2). Multi-touch device (1, 13, 17, 20) to Claim 5 or 6 , characterized in that the screen electronics (3) are designed to operate the multi-touch screen (2) in such a way as to depend on signals from the monitoring electronics (12) that an alignment of information (21) displayed on the multi-touch screen (2) takes place in dependence on an angular position of a person (18) located laterally next to the multi-touch screen (2). Multi-touch device (1, 13, 17, 20) to Claim 7 , characterized in that the screen electronics (3) are arranged to operate the multi-touch screen (2) in such a way as to depend on signals from the monitoring electronics (12) that a welcoming information (19) is displayed on the multi-touch screen (2) in dependence on the angular position of a signal arranged laterally next to the multi- Touch screen (2) person (18) is generated when the angle-dependent distance value of this person (18) falls below a predetermined contact distance value. Multi-touch device (1, 13, 17, 20) according to one of the Claims 5 until 8 , characterized by at least one support unit (4, 14) supporting the multi-touch screen (2) on the floor, which is designed such that the touch surface (5) of the multi-touch screen (2) is aligned horizontally when the multi-touch device (1, 13, 17, 20) is placed on a floor, wherein the 360-degree laser scanning unit (7) is attached to an underside (16) of the multi-touch screen (2) and/or to the support unit (4, 14). Method for operating a horizontally oriented multi-touch screen (2), characterized in that a lateral environment of the multi-touch screen (2) is scanned by means of a 360-degree laser scanning unit (7) which generates a scanning plane (8) arranged below the multi-touch screen (2) and aligned parallel to a touch surface (5) of the multi-touch screen (2), and the multi-touch screen (2) is operated at least indirectly as a function of scan data from the 360-degree laser scanning unit (7). Procedure according to Claim 10 , characterized in that at least one individual angle-dependent distance value is generated from the scan data for each object located laterally next to the multi-touch screen (2), and the multi-touch screen (2) is operated as a function of the angle-dependent distance value if the angle-dependent distance value is smaller than a predetermined minimum distance value. Procedure according to Claim 11 , characterized in that an angle-dependent distance value is optionally assigned either to an immobile object under or next to the multi-touch screen (2) or to a person (18) next to the multi-touch screen (2) and the multi-touch screen (2) is operated solely in dependence on such an angle-dependent distance value which is assigned to a person (18) to the side of the multi-touch screen (2). Procedure according to Claim 11 or 12 , characterized in that a plurality of angle-dependent distance values are generated for a person (18) located to the side of the multi-touch screen (2), these angle-dependent distance values are combined to form a data packet, and the multi-touch screen (2) is operated in dependence on the data packet. Method according to one of the Claims 10 until 13 , characterized in that the multi-touch screen (2) is operated at least indirectly as a function of scan data from the 360-degree laser scanning unit (7) in such a way that the multi-touch screen (2) provides an at least abstract and angle-accurate visualization of persons (18) located to the side of the multi-touch screen (2). Method according to one of the Claims 10 until 14 , characterized in that the multi-touch screen (2) is operated at least indirectly as a function of scan data from the 360-degree laser scanning unit (7) in such a way that an alignment of information (21) displayed on the multi-touch screen (2) takes place as a function of an angular position of a person (18) located laterally next to the multi-touch screen (2). Procedure according to Claim 15 , characterized in that the multi-touch screen (2) is operated at least indirectly as a function of scan data from the 360-degree laser scanning unit (7) in such a way that the multi-touch screen (2) generates greeting information (19) as a function of the angular position of a person (18) located laterally next to the multi-touch screen (2) when the angle-dependent distance value of this person (18) falls below a predetermined contact distance value.

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