User interface for transportation

Abstract

The present invention relates to a user interface of a vehicle, which has a display device for generating a virtual image of an operating surface floating in an interactive space and an operating unit for operating the virtual operating surface, wherein the operating unit has a sensor system for detecting and / or tracking an operating object, wherein the user interface has a housing, which accommodates both the display device and the operating unit and is rotatably supported. In order to realize a user interface that expands the usability of the user interface, according to the present invention, the housing is connected to a holding portion arranged in a torsionally fixed manner in the vehicle in a manner that prevents loss through a sliding support device to realize rotatable support.

Description

Technical Field

[0001] The present invention relates to a user interface of a vehicle, which has a display device for generating a virtual image of an operating surface floating in an interactive space and an operating unit for operating the virtual operating surface, wherein the operating unit has a sensor system for detecting and / or tracking an operating object, wherein the user interface has a housing, which accommodates both the display device and the operating unit and is rotatably supported. Background Art

[0002] Such a user interface is described, for example, in document DE 10 2017 208 343 A1. The user interface has multiple components of a display device via a screen and a multi-mirror panel, which are supported inside a cylindrical housing, which is Figure 2 12. The housing is supported inside another housing without a reference numeral and in a trapezoidal shape. In order to set the display device according to the position of the observer, the cylindrical housing can be supported inside the outer trapezoidal housing with a small angle of rotation.

[0003] DE 10 2017 208 343 A1 does not disclose how the rotatable mounting of the cylindrical housing is implemented in detail. Due to the size of the user interface and the noise emissions of many known mountings, high requirements are placed on such a mounting. In addition, the inconspicuous rotatability of the housing through a small angle limits the applicability of such a user interface, even because the user interface can only be operated from a specific viewing angle in the vehicle due to its rigid orientation - except for a small angle adjustment. Summary of the invention

[0004] Based on this, the technical problem to be solved by the present invention is to provide a user interface which expands the applicability of the user interface.

[0005] The technical problem is solved by the present invention. According to the present invention, the housing is connected to a retaining portion arranged in a torsionally fixed manner in the vehicle in a way that prevents loss by means of a sliding bearing device to achieve a rotatable support. This sliding bearing device can provide sufficient and good stability for the user interface even when the diameter is relatively large, so even a diameter of about 40 cm and the sliding surface is as small as possible. In addition, compared to other bearing devices, especially ball bearings, drum roller bearings or needle bearings, this sliding bearing device can also rotate with low noise, maintenance-free and wear-free. Originally, those bearing devices cannot be used directly with the size required here, and are therefore difficult to use and costly. In addition, the user interface can also be rotated at a large angle by means of the sliding bearing device, so that the user interface can be operated from different positions inside the vehicle. In addition to being able to be set to an ideal visual position and interactive position, the user interface can also be alternately oriented to different users.

[0006] Preferred embodiments of the present invention are described below.

[0007] According to the present invention, a user interface of a vehicle is designed, wherein the user interface has a display device for generating a virtual image of an operating surface floating in an interactive space and an operating unit for operating the virtual operating surface, wherein the operating unit has a sensor system for detecting and / or tracking an operating object, wherein the user interface has a shell, which accommodates both the display device and the operating unit and is rotatably supported, and is characterized in that the shell is anti-lostly connected to a retaining portion arranged in a rotationally fixed manner in the vehicle via a sliding support device to achieve rotatable support, wherein the retaining portion is rotationally connected to a fixed sliding body, the fixed sliding body is preferably constructed in two parts and forms an annular undercut portion in the assembled state of the sliding body, wherein the shell is rotationally connected to the rotatable sliding body, the rotatable sliding body has an annular tenon, and in the assembled state of the user interface, the tenon bites into the undercut portion of the fixed sliding body.

[0008] In addition, the design solution according to the present invention includes at least one of the following technical features:

[0009] The sliding bearing is a sliding bearing with dry friction, for which purpose the fixed and rotatable sliding bodies have a coating made of polytetrafluoroethylene at least in the region of the sliding surface;

[0010] The retaining portion and the housing each have at least one or two stops, which limit the rotatability of the housing to a maximum of 360°, preferably a maximum of 135°;

[0011] The housing has an actuator for manual, semi-automatic or automatic rotation of the housing, so that the housing can be oriented arbitrarily between stops;

[0012] The housing is connected to a releasable lock which allows the housing to be fixed in any orientation between stops;

[0013] The display device has a 3D image generation system and an optical device for generating an actual image of the operating surface, wherein the optical device projects the actual image of the operating surface into the interactive space, and the interactive space is located in the field of vision of the operator;

[0014] The 3D image generation system is an autostereoscopic system, in particular a 3D display with lenses;

[0015] The optical device is a multi-mirror plate;

[0016] To avoid reflections, the user interface has at least one optical filter element, in particular at least one polarization filter;

[0017] The optical device and / or the display device of the user interface each have at least one optical filter element;

[0018] The sensor system has a time-of-flight sensor and / or a stereo camera system;

[0019] The user interface has at least one signaling device, which is configured to generate a perceptible signal as a function of an operation of the operating surface, wherein the signaling device is preferably a device for generating an area perceptible by touch in an interaction space of the operating surface;

[0020] The device for generating a tactilely perceptible area within the interaction space has a plurality of ultrasonic loudspeakers, the ultrasonic signals of which are tunable for this purpose in terms of phase, frequency and amplitude;

[0021] The ultrasonic speakers form at least one module individually or in groups, and the module is arranged in the interaction space;

[0022] The signaling device is designed to generate acoustic and / or optical feedback when the virtual operating surface is operated.

[0023] According to an advantageous first embodiment of the invention, the retaining part is connected in a rotationally fixed manner to a fixed sliding body, which is preferably designed in two parts and forms an annular undercut (or undercut) in the assembled state of the sliding body. In contrast, the housing is preferably connected in a rotationally fixed manner to a sliding body that is rotatable relative to the retaining part and has an annular tenon (or cam, spring) that engages in the undercut of the fixed sliding body in the assembled state of the user interface. The positive engagement of the annular tenon in the likewise annular undercut of the fixed sliding body forms a loss-proof support of the user interface in the retaining part, which also produces only a small amount of play, so that the user interface is stably supported.

[0024] According to another preferred embodiment of the invention, the sliding bearing is a sliding bearing with dry friction, for which purpose the fixed and rotatable sliding bodies have a coating made of polytetrafluoroethylene at least in the region of the friction surface. Such a coating is wear-resistant and can be applied cost-effectively to metallic sliding bodies, in particular sliding bodies made of steel or aluminum.

[0025] As mentioned above, the user interface should be able to rotate at a large angle so that the user interface can be used alternately by different users inside the vehicle. Here, according to an advantageous embodiment of the invention, it is provided that the retaining portion and the housing each have at least one or two stops, which limit the rotatability of the housing to a maximum of 360°, preferably a maximum of 135°. The maximum limitation of 360° is selected so that any cable routing from the vehicle to the housing is not twisted off due to accidental excessive twisting, wherein even rotational movements of more than 360° can be provided in the case of sliding contact. The maximum limitation of 135° means that the user interface is preferably used alternately by two passengers sitting side by side, for which a rotatability of 135° is sufficient.

[0026] According to another preferred design of the present invention, in order to rotate the user interface to the desired position, the housing has an actuator for manual, semi-automatic or automatic rotation of the housing, so that the housing can be arbitrarily oriented between the stops. Preferably, an actuator in the form of a handle is arranged for manual rotation, and the user interface can be grasped and manually rotated on the actuator in the form of a ball handle. For semi-automatic rotation of the user interface, a physical or virtual switch is provided, so that the user interface can be rotated by means of a suitably arranged motor drive. In the case of automatic rotatability of the user interface, such a motor drive is also provided, wherein as a supplement, a sensor device, such as a head tracking system, must be present so that a suitably arranged control unit can determine at what angle and direction the user interface is oriented according to the evaluation of the recorded data.

[0027] According to an advantageous embodiment of the invention, in order that the user interface does not move out of the set position during travel of the vehicle, the housing is connected to a releasable lock which allows the housing to be releasably fixed in any orientation between stops. Such a lock can be realized by a brake which can be operated manually, semi-automatically or automatically and which can temporarily block the rotatability of the housing. In the case of a greased bearing device instead of the preferred dry friction, such a lock can even be omitted, since the greased bearing device has sufficient initial resistance so that the user interface cannot be accidentally rotated out of the set position.

[0028] The principle of the display device and the operating unit is explained below. Here, according to the preferred embodiment of the present invention, the display device has a 3D image generation system and an optical device for generating an actual image of the operating surface, and the optical device projects the actual image of the operating surface into an interactive space, which is located in the field of vision of the operator. This 3D image generation system is preferably an autostereoscopic system, in particular a 3D display with a (biconvex) lens shape. As an alternative to this, the 3D image generation system can be a light field display, a volume display or a 3D display. The optical device of the display device creates a feeling that the image is detached from the surface and floating, and can be designed as a multi-mirror plate, in particular as a multi-mirror plate with two-sided (dihedralen) mirrors.

[0029] In order to avoid unwanted light reflections, the user interface has at least one optical filter element, which can be designed in particular as a polarization filter. In particular, it is provided that the display device has such an optical filter element, which prevents unwanted reflections from the system, which are caused, for example, by the display device itself. The optical device preferably also has an optical filter element, which prevents unexpected light reflections from the outside, such as light reflections caused by sunlight or lamps in the environment near the information terminal.

[0030] According to the preferred design of the present invention, in order to be able to manipulate the operating surface presented holographically by the display device, a sensor system is provided, which realizes the accurate detection and tracking of the position of the operating object inside the interactive space. For example, hands, fingers and even faces can be defined as operating objects according to the application. According to the preferred design of the present invention, the sensor system has at least one time-of-flight sensor and / or at least one stereo camera system, which preferably works in the infrared spectrum. Optionally and / or additionally, the sensor system can also have an acoustic camera with an ultrasonic speaker and an ultrasonic microphone, which is discussed in more detail below. It has been proved to be particularly advantageous here that different sensors are combined inside the sensor system so as to detect a larger range of motion of the object to be operated by a suitable sensor distribution. Otherwise, hidden areas or shadow areas will be generated in the case of using only one sensor, which will lead to misunderstanding of the operation. By integrating this sensor system for identifying and / or tracking the operating object in the interactive space, hand-based operation can be performed directly using the holographically presented operating unit. Therefore, the operation of the user interface is independent of the surface, that is, the user interface that does not directly contact the component.

[0031] The user interface preferably has at least one signaling device, which signals a possible operation of the virtual operating surface. Here, according to a particularly preferred embodiment of the present invention, the signaling device is a device for generating an area that can be perceived by touch in the interaction space of the operating surface. For this purpose, suitable devices can generate, for example, sound signals, in particular ultrasonic signals, airflow or light pulses. Optionally, it is also feasible to form plasma or temperature stimulation in the air.

[0032] However, according to a preferred design of the present invention, it is preferably provided that the device for generating an area perceptible by touch within the interaction space has a plurality of ultrasonic speakers, the ultrasonic signals of the ultrasonic speakers being tunable for this purpose in terms of phase, frequency and amplitude, wherein the ultrasonic speakers preferably form at least one module individually or in groups, and the modules are arranged in the interaction space.

[0033] In particular, it is provided that the ultrasonic loudspeakers of a module are arranged on a common module plane. Preferably, the ultrasonic loudspeakers of a module have an orientation that is oriented parallel to one another. Although the specific design of such a module, in particular with regard to the number and arrangement of the ultrasonic loudspeakers, is not specified and is essentially arbitrary, a matrix-shaped arrangement of the ultrasonic loudspeakers has proven to be advantageous in practice. A square matrix arrangement of, for example, 4x4 ultrasonic loudspeakers is particularly preferred.

[0034] According to an optional embodiment of the present invention, the interactive terminal has at least three modules, whose module planes are at least partially oriented at an angle to each other, so that the modules can be optimally arranged around the interactive space and oriented to predetermined positions in the interactive space.

[0035] The control of the signaling device and thus of at least one module is effected by a control unit, so that in this case simple and therefore inexpensive modules can be used. In order to ensure that all modules are controlled correctly in time when a plurality of modules are optionally used, in this case all line lengths and signal propagation times must be known or of equal length.

[0036] Alternatively, each module has a separate microcontroller for configuring and / or controlling the ultrasonic speaker of the module and for communicating with the control unit. This results in an optimal networking of the module with the control unit configured as a master control device, and communication can be achieved via a real-time capable bus system.

[0037] According to a particularly preferred design of the present invention, a plurality of ultrasonic microphones are provided, which are arranged directly at the module or freely at the interactive terminal. The ultrasonic microphones are used to form a simple automatic configurability of the signaling device when necessary, and the ultrasonic microphones can also be used as a three-dimensional acoustic camera, with which objects inside the interactive space can be identified and distinguished and tracked by continuous position determination, so that the acoustic camera can even be part of the sensor system described. For this purpose, it is preferably provided that the reflection of a stationary or moving object inside the interactive space, such as the reflection of a hand inserted into the interactive space, is recorded by the ultrasonic microphone and the position, shape and movement of the object are determined by the reflected signal. Ultrasonic frequencies can be used to identify and track objects in the interactive space, which are originally emitted by ultrasonic speakers to produce tactile effects. Optionally, other frequencies different from this can also be used.

[0038] Finally, it is optionally provided here that objects can be determined by existing classification algorithms, which compare the reflection signal with existing and object-based data sets and allow an unambiguous assignment of the object when a match is known. This makes it possible to achieve specific and targeted stimulation of objects within the interaction space.

[0039] As an alternative to the device for generating a tactilely perceptible area in the interactive space of the operating surface, the signaling device can also be configured to generate acoustic and / or optical feedback when the virtual operating surface is operated. In the simplest case, the acoustic feedback is performed by a sound emitted by a loudspeaker or the like. In contrast, in the simplest case, the optical feedback can be achieved by a signal lighting device arranged directly at the interactive terminal. It is also provided that, in the case of operating a holographically presented operating surface, the operating surface itself changes its presentation content and displays the operation, for example, by other colors of the operating surface and / or by temporarily lighting up the display. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The specific implementation of the present invention is described below with reference to the accompanying drawings. In the accompanying drawings:

[0041] Figure 1 showing a first cross-sectional view of a user interface,

[0042] Figure 2 A device for generating a tactilely perceptible area within an interaction space is shown,

[0043] Figure 3a showing a second cross-sectional view of a user interface,

[0044] Figure 3b , 3c shows a detailed view of the rotatable support,

[0045] Figure 4a 4b shows a top view of an application example of a user interface,

[0046] Figure 5 A rear seat of a vehicle with a user interface is shown. DETAILED DESCRIPTION

[0047] exist Figure 1 1 shows a specific embodiment of a user interface 1 according to the invention for a vehicle (not shown). The user interface 1 has a display device 2, with which a virtual image 3 of an operating surface can be projected into an interaction space 4, in which the operating surface can be recognized holographically by an operator 5. For this purpose, the virtual image is projected into the interaction space 4 via an optical deflection component 6, in particular a multi-mirror panel.

[0048] The display device 2 has a polarization filter 7 covering the display device 2 for avoiding reflections inside the user interface 1 .

[0049] Similarly, the optical assembly 6 shown also has a polarization filter 8 which prevents undesired external reflections which are caused in particular by sunlight and / or external light sources.

[0050] The user interface 1 also has an operating unit for operating a virtual operating surface, which includes a sensor system 10 for detecting and / or tracking an operating object 11. In the illustrated embodiment, the sensor system 10 is arranged below the interaction space 4 and recognizes a hand moving in the interaction space 4, which in this case forms the operating object 11. By means of the existing object recognition and object tracking, the user interface 1 recognizes whether an operation is to be performed using the user interface 1 and, if necessary, which function is to be operated via the user interface 1, and transmits a corresponding command.

[0051] Furthermore, the user interface 1 has a further sensor system 12 in the form of a head tracking camera for detecting the head position and the orientation of the face relative to the holographically presented operating surface of the operator 5. The sensor system 12 can be used in particular for automatic rotation of the user interface 1 in order to determine the angle by which the user interface 1 must be rotated for optimal orientation.

[0052] There are various options for signaling the operations performed by the operator 5. In addition to the light signals already mentioned, such as Figure 1 As shown, the user interface 1 may have a device 21 for generating tactile feedback, and the device 21 has a plurality of ultrasonic speakers for this purpose. Figure 1In principle, the ultrasonic speakers can be arranged and oriented in any manner in the interaction space 4 or the interaction terminal of the user interface 1. Figure 2 Specific embodiments are explained.

[0053] The device 21 shown here has a plurality of cylindrical ultrasonic speakers 22, 22'. In the present embodiment, the plurality of ultrasonic speakers are grouped to form a total of 25 modules 23, 23', each module having 16 ultrasonic speakers 22, 22'. The device shown has a total of 400 ultrasonic speakers 22, 22'. The ultrasonic speakers 22, 22' of each individual module 23, 23' are arranged in a matrix with 4x4 ultrasonic speakers 22, 22' on a common module board 24 and are oriented parallel to each other. The module board 24 is constructed to be flat and forms a module plane. In the embodiment shown, the modules 23, 23' are arranged annularly and at an angle relative to the horizontal plane, so that at least one ultrasonic speaker 22 of one module 23 is oriented at an angle relative to at least one ultrasonic speaker 22' of another module 23' and is spaced apart from the common plane of the other ultrasonic speakers. The modules 23, 23' and the ultrasonic speakers 22, 22' are thus oriented substantially to the center of the interaction space 4 arranged above them. Based on the known position and orientation of the individual modules 23, 23', the ultrasonic signal can be set in terms of its phase, frequency and amplitude so that a point with an area perceptible by tactile sensation can be generated at any position inside the interaction space 4. In the figures, the interaction space 4 with possible tactile feedback is essentially shown in the shape of a partial sphere, wherein the shape of the interaction space 4 also depends on the specific and freely selectable layout of the modules 23, 23'.

[0054] In the interaction space 4, tactile areas can be generated at any location, which can be felt by a person with the hand 1 inserted into the interaction space 4. The reflection of the ultrasonic signal on the hand 11 or other objects is recorded by the optional ultrasonic microphone 25, so that the movement of the hand 11 in the interaction space 4 can be determined from the reflected signal.

[0055] A control unit 28 and a programming interface 29 are provided for controlling the device 21. In the exemplary embodiment shown, the control unit 28 is connected to the device 21 in such a way that the control signals are transmitted directly from the control unit 28 to the individual modules 23, 23'. Optionally, the modules 23, 23' can also have separate microcontrollers (not shown) which are connected to the modules 23, 23' on the one hand and to the control unit 28 on the other hand for control.

[0056] In order to control and coordinate all components of this user interface 1 with one another, the user interface has a further computing unit 13 (see Figure 1 ), the computing unit 13 is connected to all components to be controlled.

[0057] Figure 3a A specific embodiment of the present invention is shown and compared with Figure 1 A user interface 1 with a housing 36 having essentially the same functions is arranged relatively rotatably in a groove-shaped holding portion 30 of a vehicle. The holding portion 30 has an opening 31 for passing a supply cable of the user interface 1, and in the illustrated embodiment, a vertical rotation axis A of the user interface 1 also extends through the opening. The user interface 1 has a handle 32 as an actuator, and the handle 32 is provided for manually rotating the user interface 1, so that the user interface 1 can be manually set by an operator. In order to be rotatably supported, the user interface 1 is connected to the holding portion 30 in a loss-proof manner via a sliding support device 33 (or sliding bearing), wherein the specific design of the sliding support device 33 is Figure 3b . In order to ensure that the position set by the operator and thus the angular orientation is not changed by the movement of the vehicle, a lock 34 in the form of a sliding brake is provided according to the present embodiment, which in the locked state realizes a friction-fit connection relative to the housing 36 by means of a brake element 35. For this purpose, the brake element 35 can be moved manually, automatically or semi-automatically in the direction of the arrow 37. Alternatively, a disk brake or a brake with a brake element that engages in a positively locking manner in a profile formed on the housing 36 on the circumference can also be provided.

[0058] Figure 3b A detailed view of an annular sliding bearing 33 is shown. For this purpose, the retaining part 30 is connected in a rotationally fixed manner by means of a plurality of screws 38 to a fixed sliding body 39, which itself is designed in two parts and has an annular element 40 with a T-shaped cross section (head at the bottom) and an annular element 41 with a Z-shaped cross section, which in the assembled state form an annular undercut 42 or groove. The housing 36 is also connected in a rotationally fixed manner by means of a plurality of screws 43 to a sliding body 44 that can rotate relative to the fixed sliding body 39, which in the illustrated embodiment is designed in one piece and has an annular tongue 45, which in the assembled state engages in the undercut 42 of the fixed sliding body 39. This design of the sliding bodies 39, 44 forms sliding surfaces 46 that are oriented at an angle to each other. At least in these surface sections, the sliding bodies 39, 44 have a coating made of polytetrafluoroethylene, so that the sliding bearing 33 shown is a sliding bearing with dry friction. By the engagement of the annular tenon 45 in the annular undercut 42 , a captive connection is formed between the housing 36 and the holder 30 , wherein the housing 36 is rotatable about a vertical axis of rotation A.

[0059] In order to explain the different components of the sliding bearing device 33, Figure 3cIt is shown in an exploded view (without the bolts 38 , 43 ).

[0060] Figure 4a , b show a top view of the application of such a user interface 1, wherein the user interface 1 can be used alternately by different operators 5, 5', for which the user interface 1 only needs to be rotated in the direction of the arrow 47. This embodiment is particularly advantageous as a user interface 1 inside a rear seat 48, such as Figure 5 Here, the user interface 1 can also be oriented to different seats by rotating the handle 32 in the direction of the arrow 47.

[0061] List of reference numerals: A axis of rotation

[0062] 1 User Interface

[0063] 2Display device

[0064] 3. Virtual image of the operating surface

[0065] 4Interactive Space

[0066] 5.5' Operator

[0067] 6Optical steering components

[0068] 7 Polarizing filter

[0069] 8 polarizing filters

[0070] 10 sensor system

[0071] 11 Operation Objects

[0072] 12 sensor system

[0073] 13 computing unit 21 device for generating tactile feedback 22, 22' ultrasonic speaker

[0074] 23, 23' module

[0075] 24 module board

[0076] 25 Ultrasonic Microphone

[0077] 28Control Unit

[0078] 29Programming interface

[0079] 30 Holding part

[0080] 31 Opening

[0081] 32 handles

[0082] 33 Sliding support device

[0083] 34 Locking device

[0084] 35 Braking elements

[0085] 36 Shell

[0086] 37 Arrow direction

[0087] 38 bolts

[0088] 39 Fixed sliding body

[0089] 40T-shaped ring element

[0090] 41Z-shaped ring element

[0091] 42 Undercut

[0092] 43 bolts

[0093] 44 Rotatable sliding body

[0094] 45 tenon

[0095] 46 Sliding surface

[0096] 47 Arrow direction

[0097] 48 rear seats

Claims

1. A user interface of a vehicle, the user interface comprising a display device (2) for generating a virtual image (3) of an operating surface floating in an interaction space (4) and an operating unit for operating the virtual operating surface, the operating unit comprising a sensor system (10) for detecting and / or tracking an operating object (11), wherein: The user interface (1) has a housing (36), which accommodates both the display device (2) and the operating unit and is rotatably supported, characterized in that the housing (36) is connected to a retaining portion (30) arranged in a rotationally fixed manner in the vehicle via a sliding support device (33) in a loss-proof manner to achieve rotatable support, wherein the retaining portion (30) is connected in a rotationally fixed manner to a fixed sliding body (39), the fixed sliding body is constructed in two parts and forms an annular undercut portion (42) in the assembled state of the fixed sliding body (39), wherein the housing (36) is connected in a rotationally fixed manner to a rotatable sliding body (44), the rotatable sliding body having an annular tenon (45), which engages in the undercut portion (42) of the fixed sliding body (39) in the assembled state of the user interface (1).

2. The user interface according to claim 1, characterized in that The sliding bearing (33) is a sliding bearing with dry friction, for which purpose the fixed and rotatable sliding bodies (44) have a coating made of polytetrafluoroethylene at least in the region of the sliding surface (46).

3. The user interface according to any one of claims 1 to 2, characterized in that The retaining portion (30) and the housing (36) each have at least one or two stops, which limit the rotatability of the housing (36) to a maximum angle of 360°.

4. The user interface according to claim 3, characterized in that The housing (36) has an actuator for manual or semi-automatic or automatic rotation of the housing (36), so that the housing (36) can be oriented in any desired manner between stops.

5. The user interface according to claim 3, characterized in that The housing (36) is connected to a releasable lock (34) which allows the housing (36) to be fixed in any orientation between stops.

6. The user interface according to any one of claims 1 to 2, characterized in that The display device (2) has a 3D image generation system for generating an actual image of an operating surface and an optical device (6), which projects the actual image of the operating surface into the interaction space (4), which is located in the field of vision of the operator (5).

7. The user interface according to claim 6, characterized in that The 3D image generation system is an autostereoscopic system.

8. The user interface according to claim 6, characterized in that The optical device (6) is a multi-mirror plate.

9. The user interface according to any one of claims 1 to 2, characterized in that In order to avoid reflections, the user interface (1) has at least one optical filter element.

10. The user interface according to claim 6, characterized in that The optical device (6) and / or the display device (2) of the user interface (1) each have at least one optical filter element.

11. The user interface according to any one of claims 1 to 2, characterized in that The sensor system (10) has a time-of-flight sensor and / or a stereo camera system.

12. The user interface according to any one of claims 1 to 2, characterized in that The user interface has at least one signaling device which is provided to generate a perceptible signal as a function of an operation of the operating surface.

13. The user interface according to claim 12, characterized in that The signaling device is a device (21) for generating an area in the interaction space (4) of the operating surface that can be perceived by the sense of touch.

14. The user interface according to claim 13, characterized in that The device (21) for generating a tactilely perceptible area within an interaction space (4) has a plurality of ultrasonic loudspeakers (22, 22'), the ultrasonic signals of which can be tuned for this purpose in terms of phase, frequency and amplitude.

15. The user interface according to claim 14, characterized in that The ultrasonic speakers (22, 22') form at least one module (23, 23') individually or in groups, and the module is arranged at the interaction space (4).

16. The user interface according to claim 12, characterized in that The signaling device is designed to generate acoustic and / or optical feedback when the virtual operating surface is operated.

17. The user interface according to claim 3, characterized in that The stop limits the rotatability of the housing (36) to a maximum angle of 135°.

18. The user interface according to claim 7, characterized in that The 3D image generation system is a 3D display with lenses.

19. The user interface according to claim 9, characterized in that In order to avoid reflections, the user interface (1) has at least one polarization filter (7, 8).

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