Patent Description:
Display systems for aircrafts frequently include a plurality of display units. Respective display units of a given plurality of display units may be embodied as display screens or display surfaces. Such display screens or display surfaces may e. be located in a cockpit of a given aircraft. Furthermore, the respective display units may be allocated to different operator stations in the given aircraft. For instance, a first number of display units of the respective display units may be allocated to an operator station that is assigned to a pilot of the given aircraft and a second number of display units of the respective display units may be allocated to an operator station that is assigned to a co-pilot of the given aircraft, or to one or more other persons in the given aircraft, such as e. an observer and/or a crew member who conduct a particular flight mission, and so on.

The first number of display units and the second number of display units may be controlled independent of each other by a suitable control unit so that respectively displayed information may differ on the first and second number of display units. Alternatively, the first and second number of display units may be synchronized by a suitable control unit such that respectively displayed information is identical on the first and second number of display units.

For instance, the document <CIT> describes a display system in an aircraft that includes a first number of display units which are allocated to a pilot's operator station assigned to a pilot of the aircraft, and a second number of display units which are allocated to a co-pilot's operator station assigned to a co-pilot of the aircraft. In a normal operation mode, the first number of display units and the second number of display units display the same images, i. they are synchronized by a suitable control unit such that respectively displayed information is identical on the first and second number of display units.

The document <CIT> describes a similar display system in an aircraft that includes a first number of display units and a second number of display units. Again, the first number of display units and the second number of display units display the same images, i. they are synchronized by a suitable control unit such that respectively displayed information is identical on the first and second number of display units.

More specifically, the first number of display units and the second number of display units of a display system in an aircraft may be configured to display one or more displayable parameters, such as e. a decision altitude, a minimum decision altitude, a decision height, an upper altitude limit, an upper height limit, a heading, a course, a barometric value, and so on. A respective control unit associated with the display system may be embodied to control display of the one or more displayable parameters on the first number of display units and/or the second number of display units of the display system. Illustrative control units which control display of displayable parameters on display units of a display system in an aircraft are described in the documents <CIT> and <CIT>.

The first number of display units and the second number of display units of a display system in an aircraft are usually separately configured by the associated control unit using dedicated configuration files when booting the display system. In other words, a first configuration file is required for the first number of display units and a second configuration file is required for the second number of display units. However, the configuration files are generally static, thus, preventing e. reconfiguration of the first number of display units and the second number of display units of a given display system to or during a particular flight mission.

It is, therefore, an object of the present invention to provide a new display system with a first number of display units and a second number of display units, which may easily and rapidly be reconfigured. It is a further object of the present invention to provide an aircraft having such a new display system, as well as a method of configuring such a new display system of an aircraft.

This object is solved by a display system for an aircraft comprising the features of claim <NUM>. More specifically, according to the present invention a display system for an aircraft comprises at least one first display unit, at least one second display unit, a control unit that is configured to control the at least one first display unit and the at least one second display unit, and a storage unit with a main memory that is configured to store at least one configuration file that is useable by the control unit for configuration of the at least one first display unit and the at least one second display unit. The at least one configuration file defines at least one displayable parameter for the at least one first display unit and the at least one second display unit and comprises at least one default behavior tag associated with the at least one displayable parameter. The at least one default behavior tag defines a default behavior of the at least one first display unit and the at least one second display unit upon display of the at least one displayable parameter.

Advantageously, by introducing the at least one default behavior tag into the at least one configuration file, the latter may be used to configure both the at least one first display unit and the at least one second display unit. Any required personalization of the configuration of the at least one first display unit and/or the at least one second display unit may be performed by means of the at least one default behavior tag. Thus, instead of providing different configuration files for the at least one first display unit and the at least one second display unit, a single configuration file is provided that may be personalized by means of the at least one default behavior tag.

More specifically, a default behavior tag may preferably be associated with each displayable parameter defined in a given configuration file for at least one first display unit and at least one second display unit. For instance, the default behavior tag may have the form SLAVE [TRUE, FALSE].

Preferably, by setting the default behavior tag SLAVE of a given displayable parameter to the value TRUE, i. SLAVE = TRUE, a slave mode is forced for the given displayable parameter such that display of the given displayable parameter is synchronized between the at least one first display unit and the at least one second display unit. In contrast, by setting the default behavior tag SLAVE of the given displayable parameter to the value FALSE, i. SLAVE = FALSE, an un-slave mode is forced for the given displayable parameter such that display of the given displayable parameter is not synchronized between the at least one first display unit and the at least one second display unit.

Furthermore, each default behavior tag in the given configuration file is preferably initially set to a predetermined default value. Thus, synchronization or non-synchronization of the displayable parameters between the at least one first display unit and the at least one second display unit is initially pre-parameterized by means of the given configuration file which is stored in a main memory of the display system having the at least one first display unit and the at least one second display unit.

For purposes of illustration, it is assumed by way of example that the given configuration file only defines the following displayable parameters: decision altitude DA, minimum decision altitude MDA, decision height DH, upper altitude limit ALTLIM, and upper height limit HTLIM, as well as a default behavior tag in the form SLAVE [TRUE, FALSE] for each defined displayable parameter. Accordingly, the given configuration file comprises entries such as: DA SLAVE [TRUE, FALSE], MDA SLAVE [TRUE, FALSE], DH SLAVE [TRUE, FALSE], ALTLIM SLAVE [TRUE, FALSE], and HTLIM SLAVE [TRUE, FALSE].

Furthermore, it is assumed that each default behavior tag in the given configuration file is initially set to force the slave mode between the at least one first display unit and the at least one second display unit, i. to SLAVE = TRUE. Accordingly, the given configuration file comprises entries such as: DA SLAVE = TRUE, MDA SLAVE = TRUE, DH SLAVE = TRUE, ALTLIM SLAVE = TRUE, and HTLIM SLAVE = TRUE. Thus, when initially booting the display system with the at least one first display unit and the at least one second display unit, display of the displayable parameters DA, MDA, DH, ALTLIM and HTLIM is set to the slave mode.

Preferably, each default behavior tag in the given configuration file may be modified, e. via an associated human-machine interface, such as a touchscreen, a keyboard, one or more pushbuttons, switches and so on. By way of example, an operator at an operator station to which the at least one first display unit or the at least one second display unit is associated, such as a pilot at the pilot's operator station, may modify one or more default behavior tags. Each modified default behavior tag is then stored in a secondary memory associated with the display system, preferably in a non-volatile random-access memory (NVRAM). More specifically, the modified default behavior tags may be stored in an associated modified default behavior tag file in the NVRAM. Thus, at each further booting resp. rebooting of the display system the modified default behavior tags may be retrieved from the NVRAM and used to overwrite the default behavior tags from the given configuration file.

For instance, it is assumed that in the above-described example the DA and DH default behavior tags are modified and set to the un-slave mode, e. by the pilot. Accordingly, the modified behavior tags DA SLAVE = FALSE and DH SLAVE = FALSE are stored in the NVRAM. Thus, when rebooting the display system, these modified behavior tags are retrieved from the NVRAM and used to overwrite the initial default behavior tags from the given configuration file. In other words, as long as no modified behavior tags are stored in the NVRAM, the default behavior tags from the given configuration file are applied.

Moreover, a single tag may be provided that is suitable to define a default behavior and/or the modified behavior of each displayable parameter defined in the configuration file. For instance, an ALL SLAVE [TRUE, FALSE] parameter may be provided in the given configuration file or stored in NVRAM to force the behavior of the at least one first display unit and the at least one second display unit with respect to all displayable parameters.

According to some aspects, the storage unit further comprises a secondary memory that is configured to store at least one modified default behavior tag that is adapted to be used instead of the at least one default behavior tag.

According to some aspects, the secondary memory is a non-volatile random-access memory.

According to some aspects, the display system further comprises at least one human-machine interface that is configured to enable generation of the at least one modified default behavior tag and to cause storage of the at least one modified default behavior tag in the secondary memory.

According to some aspects, the at least one human-machine interface is associated with the at least one first display unit and/or the at least one second display unit.

According to some aspects, the control unit is adapted to configure the at least one first display unit and the at least one second display unit using the at least one configuration file, wherein the control unit is further adapted to use the at least one modified default behavior tag instead of the at least one default behavior tag.

According to some aspects, the displayable parameter is one of a decision altitude, a minimum decision altitude, a decision height, an upper altitude limit, an upper height limit, a heading, a course, or a barometric value.

According to some aspects, the at least one default behavior tag and the at least one modified default behavior tag are respectively configured to cause either synchronization or non-synchronization of the at least one first display unit and the at least one second display unit upon display of the at least one displayable parameter.

According to some aspects, the at least one first display unit is associated with a first operator station of an aircraft, wherein the at least one second display unit is associated with a second operator station of the aircraft.

The present invention further provides an aircraft comprising a new display system as described above.

Furthermore, the present invention provides a method of configuring a display system of an aircraft. The display system comprises at least one first display unit, at least one second display unit, a control unit that is configured to control the at least one first display unit and the at least one second display unit, and a storage unit with a main memory and a secondary memory. The method comprises the following steps that are executed by means of the control unit: retrieving, from the main memory, at least one configuration file that is useable by the control unit for configuration of the at least one first display unit and the at least one second display unit, wherein the at least one configuration file defines at least one displayable parameter for the at least one first display unit and the at least one second display unit and comprises at least one default behavior tag associated with the at least one displayable parameter, and wherein the at least one default behavior tag defines a default behavior of the at least one first display unit and the at least one second display unit upon display of the at least one displayable parameter; configuring the at least one first display unit and the at least one second display unit using the at least one configuration file; retrieving, from the secondary memory, at least one modified default behavior tag that is provided to be used instead of the at least one default behavior tag; and using the at least one modified default behavior tag instead of the at least one default behavior tag for the at least one displayable parameter with the at least one first display unit and the at least one second display unit.

According to some aspects, the at least one first display unit is associated with a first operator station in an aircraft, wherein the at least one second display unit is associated with a second operator station in the aircraft.

Embodiments are outlined by way of example in the following description with reference to the attached drawings.

<FIG> shows an aircraft <NUM> according to an embodiment of the present invention. More specifically, a front part of an airplane is shown, which illustratively forms the aircraft <NUM>.

By way of example, the aircraft <NUM> comprises a fuselage <NUM> that forms two compartments. The two compartments may include a cockpit 2a and a cabin or cargo compartment 2b.

According to an aspect of the present invention, the aircraft <NUM> comprises a display system <NUM>. The display system <NUM> is preferably at least partly arranged in the cockpit 2a. The display system <NUM> is further described at <FIG> and <FIG> below.

It should be noted that the aircraft <NUM> is only illustratively embodied as an airplane. However, the aircraft <NUM> may alternatively be embodied as a multicopter, a helicopter, or any other flying vehicle, as well as even a non-flying vehicle, in which the display system <NUM> as described in more detail hereinafter may be installed.

<FIG> shows the display system <NUM> of <FIG>, which is formed according to an illustrative embodiment of the present invention. The display system <NUM> may include a display management system <NUM>, as well as at least one and, illustratively, two human-machine interfaces (HMI) <NUM>, <NUM>.

More specifically, the display management system <NUM> preferably comprises at least one first display unit (DU) <NUM> and at least one second display unit (DU) <NUM>. The human-machine interfaces <NUM>, <NUM> are preferably associated with the at least one first display unit <NUM> and/or the at least one second display unit <NUM>. For instance, the human-machine interface <NUM> may be associated with the at least one first display unit <NUM> and the human-machine interface <NUM> may be associated with the at least one second display unit <NUM>.

Illustratively, a plurality of first display units <NUM> is provided, which is hereinafter only referred to as "the display units <NUM>", for simplicity and brevity. Similarly, a plurality of second display units <NUM> is provided, which is hereinafter only referred to as "the display units <NUM>", for simplicity and brevity. Each one of the display units <NUM> and/or the display units <NUM> may be embodied as a display screen or a screen, or it may be formed by a display surface, a display area or a display window.

The display units <NUM> illustratively form a first display units sub-assembly <NUM>. The first display units sub-assembly <NUM> is preferably associated with a first operator station, such as e. the operator station of a pilot of the aircraft <NUM> of <FIG>.

Similarly, the display units <NUM> form a second display units sub-assembly <NUM>. The second display units sub-assembly <NUM> is preferably associated with a second operator station, such as e. the operator station of a co-pilot of the aircraft <NUM> of <FIG>. However, the second operator station, i. the second display units sub-assembly <NUM>, may alternatively be associated with one or more other persons in the aircraft <NUM> instead of the co-pilot, such as e. an observer and/or a crew member who conduct a particular flight mission, and so on.

Illustratively, the display management system <NUM> further comprises a control unit <NUM> and a storage unit <NUM>. The storage unit <NUM> may be connected to the control unit <NUM> via a connection <NUM>. Preferably, the storage unit <NUM> is configured to store at least one configuration file (<NUM> in <FIG>) that is useable by the control unit <NUM> for configuration of the display units <NUM> and the display units <NUM>. By way of example, the control unit <NUM> configures the display units <NUM> and the display units <NUM> for display of selected displayable parameters, such as e. a decision altitude DA, a minimum decision altitude MDA, a decision height DH, an upper altitude limit ALTLIM, an upper height limit HTLIM, a heading HDG, a course CRS, and/or a barometric value, such as e. an atmospheric pressure QFE or an altimeter sub-scale setting QNH.

More generally, the control unit <NUM> is preferably configured to control the display units <NUM> and the display units <NUM>. Therefore, the control unit <NUM> may be connected to the display units <NUM> via connections <NUM> and to the display units <NUM> via connections <NUM>.

More specifically, the control unit <NUM> may be connected via connections <NUM>, <NUM> to the human-machine interfaces <NUM>, <NUM> to receive inputs from the human-machine interfaces <NUM>, <NUM>. Various variants are possible for the human-machine interfaces <NUM>, <NUM>. Human-machine interfaces <NUM>, <NUM> may e. include push-buttons, joysticks, pointing devices such as trackballs, touchscreens, etc. or any combination thereof.

The control unit <NUM> may further be connected to a set of avionics computers. For instance, the control unit <NUM> may be connected to avionics computers of a flight management system that collects data, e. from databases, GPS sensors, pressure altimeters and so on, for display on the display units <NUM> and/or the display units <NUM>.

<FIG> shows the storage unit <NUM> of <FIG> with a main memory <NUM>. Preferably, the storage unit <NUM> further comprises a secondary memory <NUM>. The secondary memory <NUM> is preferentially a non-volatile random-access memory (NVRAM).

The main memory <NUM> is preferably configured to store at least one configuration file <NUM> that is useable by the control unit <NUM> of <FIG> for configuration of at least one of the display units <NUM> of <FIG> and at least one of the display units <NUM> of <FIG>. By way of example, it is assumed that the at least one configuration file <NUM> is a single configuration file and, therefore, hereinafter referred to as "the configuration file <NUM>", which is useable by the control unit <NUM> of <FIG> for configuration of one of the display units <NUM> of <FIG>, which is hereinafter referred to as "the reconfigurable display unit <NUM>", and one of the display units <NUM> of <FIG>, which is hereinafter referred to as "the reconfigurable display unit <NUM>", for simplicity and clarity. However, it should be noted that one or more other configuration files may be provided for configuration of other ones of the display units <NUM> of <FIG> and the display units <NUM> of <FIG> and stored in the main memory <NUM>.

According to one aspect of the present invention, the configuration file <NUM> defines at least one displayable parameter <NUM> for the reconfigurable display unit <NUM> and the reconfigurable display unit <NUM>. By way of example, it is assumed that the configuration file <NUM> defines five displayable parameters, which are hereinafter referred to as "the predefined displayable parameters <NUM>", for simplicity and clarity, i. : decision altitude DA, minimum decision altitude MDA, decision height DH, upper altitude limit ALTLIM, and upper height limit HTLIM. The configuration file <NUM> may further define all settings required for operation of the reconfigurable display unit <NUM> and the reconfigurable display unit <NUM> together with the predefined displayable parameters <NUM>.

Preferably, the configuration file <NUM> further comprises at least one default behavior tag <NUM> associated with the predefined displayable parameters <NUM>. The at least one default behavior tag <NUM> preferentially defines a default behavior of the reconfigurable display unit <NUM> and the reconfigurable display unit <NUM> upon display of an associated one of the predefined displayable parameters <NUM>. More specifically, the at least one default behavior tag <NUM> is preferably configured to cause either synchronization or non-synchronization of the reconfigurable display unit <NUM> and the reconfigurable display unit <NUM> upon display of the predefined displayable parameters <NUM>.

For instance, the at least one default behavior tag <NUM> may have the form SLAVE [TRUE, FALSE], and one such default behavior tag may be provided for each one of the predefined displayable parameters <NUM>. Accordingly, in the described example the configuration file <NUM> may define the following predefined displayable parameters <NUM> and associated default behavior tags <NUM>: DA SLAVE [TRUE, FALSE], MDA SLAVE [TRUE, FALSE], DH SLAVE [TRUE, FALSE], ALTLIM SLAVE [TRUE, FALSE], and HTLIM SLAVE [TRUE, FALSE].

Preferably, by setting a respective default behavior tag SLAVE of a given displayable parameter to the value TRUE, i. SLAVE = TRUE, a slave mode is forced for the given displayable parameter such that display of the given displayable parameter is synchronized between the reconfigurable display unit <NUM> and the reconfigurable display unit <NUM>. In contrast, by setting the default behavior tag SLAVE of the given displayable parameter to the value FALSE, i. SLAVE = FALSE, an un-slave mode is forced for the given displayable parameter such that display of the given displayable parameter is not synchronized between the reconfigurable display unit <NUM> and the reconfigurable display unit <NUM>. Preferably, each default behavior tag is initially set to a predefined value.

For instance, it is assumed that in the described example the slave mode should be established between the reconfigurable display unit <NUM> and the reconfigurable display unit <NUM>, i. to SLAVE = TRUE. Accordingly, the configuration file <NUM> may define the following predefined displayable parameters <NUM> and associated default behavior tags <NUM>: DA SLAVE = TRUE, MDA SLAVE = TRUE, DH SLAVE = TRUE, ALTLIM SLAVE = TRUE, and HTLIM SLAVE = TRUE. Thus, when initially booting the reconfigurable display unit <NUM> and the reconfigurable display unit <NUM>, display of the predefined displayable parameters <NUM> DA, MDA, DH, ALTLIM and HTLIM is set to the slave mode.

According to one aspect of the present invention, the at least one default behavior tag <NUM> may be replaced with at least one modified default behavior tag <NUM> to enable personalization of the configuration file <NUM>. The at least one modified default behavior tag <NUM> that is adapted to be used instead of the at least one default behavior tag <NUM> is preferably stored in the secondary memory <NUM> of the storage unit <NUM>.

For instance, it is assumed that in the described example the DA and DH default behavior tags should be modified and set to the un-slave mode. Accordingly, the modified behavior tags DA SLAVE = FALSE and DH SLAVE = FALSE are created and stored in the secondary memory <NUM>.

According to one aspect of the present invention, at least one of the human-machine interfaces <NUM>, <NUM> of <FIG> is configured to enable generation of the at least one modified default behavior tag <NUM> and to cause storage of the at least one modified default behavior tag <NUM> in the secondary memory <NUM>. To this end, the at least one of the human-machine interfaces <NUM>, <NUM> may e. provide access to an editable version of the at least one modified default behavior tag <NUM> and/or the at least one default behavior tag <NUM>. For instance, the at least one of the human-machine interfaces <NUM>, <NUM> may provide a control panel accessing such an editable version. Preferably, each editing of the editable version leads to a subsequent storing. Furthermore, the control unit <NUM> of <FIG> is preferably adapted to configure the reconfigurable display unit <NUM> and the reconfigurable display unit <NUM> using the configuration file <NUM> and to use the at least one modified default behavior tag <NUM> instead of the at least one default behavior tag <NUM>.

It should be noted that the at least one modified default behavior tag <NUM> may e. be generated using the human-machine interfaces <NUM>, <NUM> of <FIG>. However, the at least one modified default behavior tag <NUM> may alternatively be generated in an aircraft-independent manner, e. by means of a general-purpose computer, and merely be stored in the secondary memory <NUM>. In the latter case, different profiles with differing modified default behavior tags may even be created and e. used for differing flight missions, and so on.

<FIG> shows an illustrative method <NUM> of providing on the one hand a configuration file with default behavior tags for configuring a display system of an aircraft, and on the other hand modified default behavior tags that may be used instead of the default behavior tags. The method <NUM> starts at step <NUM>.

More specifically, at step <NUM> a configuration file that defines at least one displayable parameter and that comprises at least one default behavior tag associated with the at least one displayable parameter is generated. For instance, the configuration file <NUM> of <FIG> is generated, which defines the at least one displayable parameter <NUM> and the at least one default behavior tag <NUM>. By way of example, the configuration file <NUM> of <FIG> with the predefined displayable parameters <NUM> and the associated default behavior tags <NUM> for configuration of the reconfigurable display units <NUM>, <NUM> of <FIG> is created.

At step <NUM>, the generated configuration file is stored in a main memory of an associated display system. By way of example, the configuration file <NUM> of <FIG> is stored in the main memory <NUM> of <FIG> of the display system <NUM> of <FIG> of the aircraft <NUM> of <FIG>.

At step <NUM>, at least one modified default behavior tag that is adapted to be used instead of the at least one stored default behavior tag is generated. By way of example, the modified default behavior tags <NUM> of <FIG> are created.

At step <NUM>, the at least one generated modified default behavior tag is stored in a secondary memory of the associated display system. By way of example, the modified default behavior tags <NUM> of <FIG> are stored in the secondary memory <NUM> of <FIG> of the display system <NUM> of <FIG> of the aircraft <NUM> of <FIG>.

<FIG> shows an illustrative method <NUM> of configuring a display system of an aircraft, wherein the display system comprises at least one first display unit, at least one second display unit, a control unit that is configured to control the at least one first display unit and the at least one second display unit, and a storage unit with a main memory and a secondary memory. The method <NUM> is preferably performed by means of the control unit and starts at step <NUM>.

For purposes of illustration, the method <NUM> is described hereinafter in the context of the aircraft <NUM> of <FIG> with the display system <NUM> of <FIG> having the reconfigurable display units <NUM>, <NUM>, as well as the control unit <NUM> and the storage unit <NUM>, with the main memory <NUM> and the secondary memory <NUM> of <FIG>. As described at <FIG> above, in the main memory <NUM> the configuration file <NUM> with the predefined displayable parameters <NUM> and the associated default behavior tags <NUM> are stored, and in the secondary memory <NUM> the modified default behavior tags <NUM> are stored.

At step <NUM>, the control unit <NUM> retrieves the configuration file <NUM> that is useable by the control unit <NUM> for configuration of the reconfigurable display units <NUM>, <NUM> from the main memory <NUM>.

At step <NUM>, the control unit <NUM> configures the reconfigurable display units <NUM>, <NUM> using the configuration file <NUM>.

At step <NUM>, the control unit <NUM> retrieves, from the secondary memory <NUM>, the modified default behavior tags <NUM> which are provided to be used instead of the default behavior tags <NUM>.

At step <NUM>, the control unit <NUM> uses the modified default behavior tags <NUM> instead of the default behavior tags <NUM> for the displayable parameters <NUM> with the reconfigurable display units <NUM>, <NUM>.

It should be noted that the above-described embodiments are merely described for illustration purposes, but not in order to restrict the present invention thereto. Instead, multiple modifications and variations of the presented embodiments are possible and should, therefore, also be considered as being part of the invention.

Claim 1:
A display system (<NUM>) adapted to an aircraft (<NUM>), comprising:
at least one first display unit (<NUM>);
at least one second display unit (<NUM>);
a control unit (<NUM>) that is configured to control the at least one first display unit (<NUM>) and the at least one second display unit (<NUM>); and
a storage unit (<NUM>) with a main memory (<NUM>) that is configured to store at least one configuration file (<NUM>), the control unit (<NUM>) being configured to read the main memory (<NUM>) and to read and use the at least one configuration file (<NUM>);
characterized in that
the at least one configuration file (<NUM>) is configured to be used by the control unit (<NUM>) for configuration of the at least one first display unit (<NUM>) and of the at least one second display unit (<NUM>),
wherein the at least one configuration file (<NUM>) is configured to define at least one displayable parameter for the at least one first display unit (<NUM>) and the at least one second display unit (<NUM>) and to comprise at least one default behavior tag (<NUM>) that is configured to be associated with the at least one displayable parameter, and
wherein the at least one default behavior tag (<NUM>) is configured to define a default behavior of the at least one first display unit (<NUM>) and the at least one second display unit (<NUM>) upon display of the at least one displayable parameter;
wherein the storage unit (<NUM>) further comprises a secondary memory (<NUM>) that is configured to store at least one modified default behavior tag (<NUM>) that is adapted to be read and used by the control unit (<NUM>) instead of the at least one default behavior tag (<NUM>); and
wherein the display system is configured for modifying the at least one default behavior tag by setting a given displayable parameter to a slave mode that is forced for the given displayable parameter and the control unit is further configured to display the given displayable parameter synchronized between the at least one first display unit (<NUM>) and at least one second display unit (<NUM>) according to the slave mode, and
the display system is configured for modifying the given displayable parameter to an un-slave mode that is forced for the given displayable parameter and the control unit is further configured to display the given displayable parameter unsynchronized between the at least one first display unit (<NUM>) and at least one second display unit (<NUM>) according to the un-slave mode.