DE102020104864B3 - Display unit and motor vehicle with display unit - Google Patents

Abstract

The invention relates to a display unit (2) designed for a motor vehicle (4), having a housing (6), a flexible, touch-sensitive screen (8) with a display surface (14), a drive unit (10, 18) and a control and control unit Evaluation unit (12) and set up in such a way that the screen (8) can be moved between a rest position and a working position by means of the drive unit (10) and that a haptic feedback can be generated by means of the drive unit (10, 18).

Description

The invention relates to a display unit designed for a motor vehicle. The invention also relates to a motor vehicle with a corresponding display unit.

Display units for motor vehicles are known in principle and, for example, in the DE 10 2016 007 995 A1 , the DE 10 2018 200 408 A1 and the DE 10 2017 200 949 A1 described.

Some current generation motor vehicles have a display unit with a touch-sensitive screen. An air conditioning system in the motor vehicle, for example, or a navigation system can be operated via a corresponding screen. Such a touch-sensitive screen is often arranged in the area of the so-called center console or in a central area of the so-called dashboard or dashboard.

The object of the present invention is to create an advantageously designed display unit for a motor vehicle and an advantageously designed motor vehicle with a corresponding display unit.

This object is achieved by a display unit with the features of claim 1 and by a motor vehicle with the features of claim 9. The advantages and preferred refinements cited with regard to the display unit can also be applied to the motor vehicle and vice versa. Advantageous configurations with expedient developments of the invention are specified in the dependent claims.

The display unit according to the invention is designed for a motor vehicle and has a housing which is designed, for example, for installation in a so-called center console, in a so-called dashboard in a headliner or in the back of a seat. Furthermore, the display unit has a screen with a display surface, which is touch-sensitive on the one hand and bendable or flexible on the other. In addition, the display unit has a drive unit and a control and evaluation unit. Here, the display unit and in particular the control and evaluation unit is set up in such a way that the screen can be moved between a rest position and a working position by means of the drive unit. In addition, the display unit and in particular the control and evaluation unit are set up in such a way that haptic feedback can also be generated by means of the drive unit.

The display unit is thus typically set up to generate haptic feedback in at least one operating mode when the screen is touched, for example, by an operator or when the screen is touched, for example, by an operator at a predetermined position. In other words, the display unit is set up to generate a type of force feedback when touched in the at least one operating mode.

In an advantageous further development, only contacts, for example between an operator and the screen / display area, are viewed as touches and typically also recorded, i.e. in particular recorded by measurement or sensor technology, in which a threshold value for a force acting on the screen is reached and / or exceeded . In this case, a touch must have a certain strength, so to speak, so that it is also recognized as a touch by the display unit. A useful threshold value for the force is a value in the range 1 N to 10 N and in particular a value in the range 2 N to 5 N. This means that the force must reach at least 2 N, for example, so that the display unit recognizes contact becomes. Only then is haptic feedback generated or output.

In this case, for example, at least one virtual operating element, for example a virtual switch, is displayed in the at least one operating mode on the display area, and when the display of the at least one virtual operating element is touched, a haptic feedback is output, in particular in this way the feel of a mechanical operating element to simulate or simply to give feedback that the corresponding virtual control element has been operated.

In addition, the display unit is designed in such a way that the screen is arranged sunk in the housing in the rest position. Regardless of this, the display unit typically has a button or some other control element, upon actuation of which the screen changes from the rest position to the work position or from the work position to the rest position, depending on the position in which the Screen is currently located. As an alternative or in addition to this, the display unit is set up to switch from the rest position to the working position as soon as the motor vehicle is put into operation, i.e. as soon as, for example, the engine of the motor vehicle in which the display unit is installed is started. In this case, the display unit is then typically also set up so that the screen changes or moves from the working position to the rest position if that Motor vehicle is placed in an idle state, so when, for example, the engine is switched off.

Furthermore, the display unit is designed and set up such that the screen or the display surface of the screen has a first curvature in the working position of the screen, which differs from a second curvature of the screen or the display surface in the rest position of the screen. Depending on the application, the display unit is designed in such a way that the screen or the display surface is essentially flat in the working position and the first curvature thus has, as it were, a value of zero. In an advantageous development, the screen or the display surface is at least partially rolled up or wound up in the rest position, for example on a drum.

As already mentioned above, the screen is designed as a touch-sensitive screen. In addition, the display unit is preferably set up so that in the at least one operating mode the screen detects a touch, for example a touch by an operator, and generates a sensor signal that depicts the touch. Furthermore, the display unit is then preferably set up in such a way that the control and evaluation unit initiates a movement pulse as a haptic feedback based on the sensor signal by activating the drive unit. For this purpose, the control and evaluation unit typically generates a control signal by means of which the drive unit is activated or controlled. Depending on the variant, the control signal is, for example, a current signal which is converted in the drive unit into a movement, i.e. the movement impulse, which is used in particular to supply the drive unit with electrical power.

According to an embodiment variant, the movement impulse is such that the screen is moved from the working position over a predetermined impulse path length in the direction of the rest position and is then moved back into the working position. To put it simply, the screen is preferably moved back and forth a bit or up and down a bit.

An embodiment is expedient here in which the pulse path length has a value between 20 μm and 500 μm, a value between 50 μm and 200 μm being preferred. It is also advantageous if the movement pulse is carried out within a short period of time and, for example, has a duration with a value in the range 1 ms to 200 ms, a value in the range 1 ms to 50 ms being preferred.

An embodiment in which the drive unit has an electric motor or is formed by an electric motor is also favorable. In one embodiment, the electric motor is designed for continuous operation with a predetermined nominal current and the display unit is set up in such a way that the electric motor is controlled to execute a movement pulse with a current pulse or current signal whose maximum current value is at least twice and in particular at least three times of the nominal current. The electric motor is typically controlled by the control and evaluation unit, which then preferably generates the current pulse or the current signal which is used to generate the movement pulse.

If the drive unit has the aforementioned electric motor, it is also advantageous if the screen is connected to the electric motor via a swivel arm, that is to say if the electric motor drives a swivel arm with which the screen is moved, for example.

Independently of this, the display unit and in particular the housing typically have at least one guide element for guiding the screen when changing between the rest position and the working position. With the help of such a guide element, a curvature or, based on a curvature in the working position, an additional curvature of the screen or the display surface in the rest position is then preferably predetermined or enforced.

An embodiment variant in which the screen is designed as a so-called OLED screen is also expedient.

Depending on the application, the display unit also has a stiffening element or a stiffening device, by means of which the screen is stiffened or stiffened, in particular in the working position. The stiffening element or stiffening device typically ensures that the screen is essentially not deformed and / or essentially does not move out of its predetermined position when it is touched, for example by an operator.

As already explained, the display unit described above is provided and designed for a motor vehicle. Accordingly, a display unit according to the invention is typically installed in a motor vehicle and a motor vehicle according to the invention then has at least one display unit according to the invention.

• 1 in einem Blockschaltbild ein Kraftfahrzeug aufweisend eine Anzeigeeinheit mit einem Bildschirm und mit einer Antriebseinheit;
• 2 in einem Querschnitt die Anzeigeeinheit mit dem Bildschirm in einer Ruhe-Stellung;
• 3 in dem Querschnitt die Anzeigeeinheit mit dem Bildschirm in einer Arbeits-Stellung; und
• 4 in einem Diagramm ein Steuersignal zur Ansteuerung der Antriebseinheit.

Further advantages, features and details of the invention emerge from the claims, the following description of preferred embodiments and on the basis of the schematic drawings. Show:

• 1 in a block diagram of a motor vehicle having a display unit with a screen and with a drive unit;
• 2 in a cross section the display unit with the screen in a rest position;
• 3 in the cross section the display unit with the screen in a working position; and
• 4th in a diagram, a control signal for controlling the drive unit.

A display unit described below as an example 2 is in a motor vehicle 4th built in, which is in 1 is shown schematically.

Here, the display unit 2 a housing 6th on, which is built into a center console not shown in the exemplary embodiment. Part of this display unit 2 is still a screen 8th . This is on the one hand as a flexible screen 8th designed and on the other hand as a touch-sensitive screen 8th . In addition, the display unit 2 a drive unit, which in the exemplary embodiment is an electric motor 10 includes, as well as a control and evaluation unit 12th .

The display unit 2 is now designed in such a way that the screen 8th by means of the drive unit, i.e. the electric motor 10 , between a rest position, which is in 2 is indicated, and a working position that is shown in 3 is reproduced, is movable. Here one points through the screen 8th trained display area 14th , what a 3 is aligned to the right and has a length and a width in the working position of the screen 8th a first curvature, which from a second curvature of the display surface 15 in the rest position of the screen 8th deviates.

In the exemplary embodiment, the display unit is 2 designed in such a way that the display area 14th is essentially flat in the working position and the first curvature thus has a value virtually zero. This is in 3 indicated. The display area is in the rest position 14th on the other hand, clearly visibly curved, just like this 2 emerges, and thus has a second curvature that is significantly different from the first curvature. The display area 14th is deformed or bent similarly to a leaf spring in the exemplary embodiment in the rest position and the curvature is essentially constant over the entire length of the display surface 14th away.

The display area corresponds to an alternative embodiment variant, not shown 14th or is the screen 8th quasi rolled up or wound up in the rest position, for example on a drum.

Next, the display unit 2 in the exemplary embodiment a stiffening element 16 by means of which the screen 8th is stiffened in particular in the working position. By means of the stiffening element 16 this typically ensures that the screen is 8th essentially not deformed when touched, for example by an operator, and / or essentially not moved out of its predetermined position.

As already mentioned, the drive unit has the aforementioned electric motor 10 on. In the exemplary embodiment, this is the screen 8th via a swivel arm 18th with the electric motor 10 connected. That is, the electric motor 10 the swivel arm 18th drives and that with the swivel arm 18th the screen 8th is moved.

The swivel arm is supplemented 18th in the exemplary embodiment by a guide element 20th to guide the screen 8th when changing between the rest position and the work position. The guiding element 20th is part of the housing 6th and forms a sliding surface on which a free end of the screen 8th slides along when changing between the rest position and the work position.

Regardless of this, the display unit 2 typically an operating element, not explicitly shown, upon actuation of which the screen 8th changes from the rest position to the work position or from the work position to the rest position, depending on the position of the screen 8th is currently located. As an alternative or in addition to this, there is the display unit 2 set up to change from the rest position to the work position as soon as the motor vehicle 4th is put into operation. In this case the display unit is 2 then typically also set up that screen 8th changes from the working position to the rest position or moves when the motor vehicle 4th is put into a hibernation state.

As mentioned earlier, the screen is 8th also as a touch-sensitive screen 8th designed. It therefore has a sensor unit 22nd to capture touches. In addition, the display unit is 2 designed in such a way that touches are detected in at least one operating mode, that is to say, for example, a touch by an operator, and that with each touch a sensor signal is generated which depicts the touch.

Furthermore is the display unit 2 set up that the control and evaluation unit 12th based on a corresponding sensor signal by controlling the drive unit, i.e. the electric motor 10 , initiates a movement impulse as haptic feedback. The control and evaluation unit typically generates 12th in addition, a control signal by means of which the drive unit is activated or controlled. In the exemplary embodiment, the control signal is a current signal S. , which is converted in the drive unit into a movement, i.e. the movement impulse, which is in particular to supply the electric motor 10 is used with electrical power. A corresponding current signal S. is in 4th shown schematically.

By such a current signal S. becomes the screen 8th is moved out of the working position over a predetermined pulse path length in the direction of the rest position and is then moved back into the working position. To put it simply, the screen is preferably moved back and forth a bit or up and down a bit.

An embodiment in which the pulse path length has a value between 20 μm and 500 μm, a value between 50 μm and 200 μm being preferred is useful here. It is also advantageous if the movement pulse is carried out within a short period of time and, for example, has a duration with a value in the range from 1 ms to 200 ms, a value in the range from 1 ms to 50 ms being preferred. In 4th is the duration of the current signal S. 20 ms and thus the duration of the movement pulse is 20 ms.

The current signal continues S. according to 4th composed of two rectangular signal parts, so it represents a kind of rectangular signal. Alternatively, as a current signal S. generates a predetermined or defined current curve, in particular with a more complex course, which is optimized with regard to the haptics and / or the noise generation generated therewith or is adapted in favor of a desired haptics and / or a desired noise generation.

Also is the aforementioned electric motor 10 the drive unit is designed for continuous operation with a specified nominal current and the display unit 2 is set up such that the electric motor 10 for executing a motion impulse with a current signal S. is controlled, the maximum current value of which corresponds to approximately three times the nominal current. The value of the nominal current is in 4th indicated by the dashed line.

List of reference symbols

2

Display unit

4th

Motor vehicle

6th

casing

8th

screen

10

Electric motor

12th

Control and evaluation unit

14th

Display area

16

Stiffening element

18th

Swivel arm

20th

Guide element

22nd

Sensor unit

S.

Current signal

Claims (9)

Display unit (2) designed for a motor vehicle (4) and having - a housing (6), - A flexible, touch-sensitive screen (8) with a display surface (14), - A drive unit (10, 18) and - A control and evaluation unit (12), the display unit (2) - is set up in such a way that the screen (8) can be moved between a rest position and a working position by means of the drive unit (10), - Is designed such that the screen (8) is sunk in the housing (6) in the rest position, - Is designed such that the display surface (14) in the working position of the screen (8) has a first curvature which differs from a second curvature of the display surface (14) in the rest position of the screen (8), and - set up in such a way that a haptic feedback can be generated by means of the drive unit (10, 18). Display unit (2) Claim 1 , set up in such a way that in at least one operating mode the screen (8) detects a touch and generates a sensor signal that depicts the touch, and that the control and evaluation unit (12) is based on the sensor signal by activating the drive unit (10, 18) initiates a movement impulse as haptic feedback. Display unit (2) Claim 2 , the movement impulse being such that the screen (8) is moved out of the working position over a predetermined impulse path length in the direction of the rest position and is then moved back into the working position. Display unit (2) Claim 3 , the pulse path length having a value between 50 µm and 200 µm. Display unit (2) after one of the Claims 2 to 4th , wherein the motion pulse has a duration in the range 1 ms to 50 ms. Display unit (2) after one of the Claims 2 to 5 , wherein the drive unit (10,18) has an electric motor (10) which is designed for continuous operation with a predetermined nominal current, and wherein the control and evaluation unit (12) uses the electric motor (10) for executing the movement pulse Controls current pulse (S), the maximum current value of which corresponds to at least twice the nominal current. Display unit (2) after one of the Claims 1 to 6th wherein the drive unit (10, 18) has an electric motor (10) and wherein the screen (8) is connected to the electric motor (10) via a swivel arm (18). Display unit (2) after one of the Claims 1 to 7th , wherein the screen (8) has a stiffening element (16) for stiffening the screen (8) in the working position. Motor vehicle (4) having a display unit (2) according to one of the preceding claims.

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