DE102005037288A1 - Method for the context-based selection of information and methods for their presentation - Google Patents

Abstract

A method for the context-dependent presentation of information, in particular on a display, is provided, in which information is presented as a function of a quantity of input facts representing a situation, in particular a driving situation. The method comprises the steps: DOLLAR A - determining at least one target fact, which is assigned to a displayable item of information, on the basis of a first subset of the set of input facts, DOLLAR A - monitoring at least one actual fact, which is the at least one target Fact is assigned; DOLLAR A - comparing the at least one actual fact with the at least one target fact; DOLLAR A - assignment of a relevance variable with a certain value to the information assigned to the target fact on the basis of the comparison result and DOLLAR A - display of the information when the value of the relevance variable fulfills a predetermined condition.

Description

method for context-based selection of information and procedures too their representation

The The present invention relates to a context-based method Selection of information. In addition, the invention relates to a method for presenting information, in particular for visual presentation information, on a display such as a head-up display.

In modern means of transport, for example in automobiles, comes one Variety of control devices for use. The number of control devices will continue in the future introduction new control devices and the expansion of existing technologies. Examples therefor are the so-called "Lane Departure Warning", so the warning in the event of deviation from the lane, the complete visibility around the lane Vehicle, but also in infotainment systems in the vehicle.

Already today poses the complexity the operation of devices and the representation the device and Vehicle messages a big one Challenge to the driver. New operating concepts, like them suggested by some car manufacturers, are possible solutions support of the driver in his tasks. One of these concepts For example, sees the gesture-based interaction with the systems in the vehicle.

The Representation or representation Information is predominantly provided acoustically or optically over the conventional gauges in the cockpit. A disadvantage the display of driving information in the instrument cluster of the cockpit the circumstance is that the driver is required to read necessary driving information must turn away the view from the traffic. Depending on the amount of information valuable time passes in the gauges until the driver the desired Information and look back at the traffic situation has turned.

A Possibility, to avoid looking away from traffic so-called head-up displays (HUDs). With this technology is it is possible the driver certain driving information directly into the windshield display. The driver does not have to take his eyes off the car Avert traffic when he has driving information such as the wants to determine instantaneous speed. Such a head-up display essentially comprises a semitransparent glass sheet, which in the direct Seefeld of the driver is attached, and a projector for generating the information to be displayed, for example through a TFT screen with particularly high luminosity can be realized.

Originally originated the conception of the aviation head-up display, where they lead to Represent the primary Indicator instruments are used. Unlike aviation, head-up displays are used in the automotive sector but not to the primary Counters counted. In the automotive sector, it is more important to change the environment, such as other road users or the road, on the head-up display display. The picture does not appear in the direct Seefeld the driver but for example directly above the hood in one optical distance of about 2 m to 4 m from the viewer.

However, not as much information in a display, especially in a head-up display, represent, as on the one hand the size of the display is limited and on the other hand, especially in head-up displays attention fixation (English "attention capture") In an attention fixation, the driver fixes certain elements of the head-up display, ie the driver devotes all his attention to an information displayed on the head-up display, and therefore recognizes changes in traffic only with a certain time delay or at worst Not at all, although he does not turn his gaze away from the traffic situation In H. Bubb, et al .: "Do you need HUDs in your motor vehicle?" Results of a literature review and own experiments, VDI reports No. 948, VDI is therefore required to display only so-called contact-analog driving information in head-up displays. Head-up displays distinguish between contact-analogue and non-contact-analogue representation. Contact-analogue forms of representation enrich the environment perceived by the driver by superimposing an artificially created scene. Aerospace examples include runway markings or artificial horizons in the head-up display. On the other hand, non-contact analog presentation forms information without direct reference to the environment, for example the course or the current speed in the field of aviation. Another way to avoid attention fixation is to use the head-up display merely as a temporary display element. This has been proposed, for example, by DM Zaidel in "Specification of methology for investigating the human factor of advanced driver information systems", Toronto University, 1999. However, when using a head-up display as a temporary display element, it is necessary to decide which driving information should be displayed ,

task The present invention is therefore a method and a Device available with the information, especially on a head-up display optical information to be displayed, selected context-based and can be represented.

The first task is through a method of context-based selection solved by information according to claim 1, the second object by a device according to claim 13.

• – Ermitteln mindestens eines Soll-Faktums, welches einer darstellbaren Information zugeordnet ist, auf der Basis einer ersten Teilmenge der Menge von Eingangsfakten. Die erste Teilmenge kann insbesondere auch die gesamte Eingangsfaktenmenge sein. Die Information kann selbst ebenfalls als ein Faktum, nämlich als ein Ausgangsfaktum angesehen werden.
• – Überwachen wenigstens eines Ist-Faktums, welches dem wenigstens einen Soll-Faktum zugeordnet ist. Das Soll-Faktum kann hierbei durch ein oder mehrere Fakten der Menge von Eingangsfakten repräsentiert sein. Falls es durch mehrere Eingangsfakten repräsentiert ist, kann das Soll-Faktum durch arithmetische oder logische Operationen aus diesen Eingangsfakten ermittelt werden.
• – Vergleichen des wenigstens einen Ist-Faktums mit dem wenigstens einen Soll-Faktum, wobei gegebenenfalls weitere Fakten berücksichtigt werden können. In den Vergleich kann dabei zusätzlich noch wenigstens ein Eingangsfaktum eingehen.
• – Zuordnen einer Relevanzgröße mit einem bestimmten Wert zu der dem Soll-Faktum zugeordneten Information auf der Basis des Vergleichsergebnisses. Die Relevanzgröße kann hierbei als ein Zwischenfaktum des Verfahrens angesehen werden, welches weder ein Eingangsfaktum noch ein Ausgangsfaktum darstellt.
• – Darstellen der Information, wenn der Wert der Relevanzgröße eine vorgegebene Bedingung erfüllt. Die vorgegebe ne Bedingung kann beispielsweise sein, dass der Wert der Relevanzgröße der größte Wert aller einer Information zugeordneten Relevanzgrößen sein muss, damit die zugehörige Information dargestellt wird. Als weiteres Beispiels ist es möglich, das Überschreiten einer Relevanzschwelle durch den Wert der Relevanzgröße zur Bedingung für das Darstellen zu machen. Auch eine Kombination aus der Größe eines Relevanzwertes im Vergleich zu den Größen der übrigen Relevanzwerte und einer Relevanzschwelle ist möglich.

The method according to the invention for context-based presentation of information, in particular for display on a display, in which the context-dependent representation takes place as a function of a quantity of input facts representing the driving situation, comprises the steps:

• Determining at least one desired fact associated with representable information on the basis of a first subset of the set of input facts. The first subset may in particular also be the entire input fact quantity. The information itself may also be considered as a fact, namely as an output fact.
• - Monitoring at least one actual fact, which is associated with the at least one target fact. The target fact can hereby be represented by one or more facts of the set of input facts. If it is represented by several input facts, the target fact can be determined by arithmetic or logical operations from these input facts.
• - Comparing the at least one actual fact with the at least one target fact, where appropriate, further facts can be taken into account. In addition, at least one input factor can be included in the comparison.
• - Assign a relevance variable with a specific value to the information associated with the target factum based on the comparison result. The relevance variable can be regarded as an intermediate factor of the method, which represents neither an input factor nor an output factor.
• - Presenting the information if the value of the relevance variable meets a predetermined condition. The predefined condition may, for example, be that the value of the relevance variable must be the largest value of all relevance variables assigned to an information, so that the associated information is displayed. As another example, it is possible to make exceeding a relevancy threshold by the value of the relevance quantity the condition for representing. A combination of the size of a relevance value in comparison to the sizes of the other relevance values and a relevance threshold is also possible.

in the inventive method a redetermining of at least one target fact can take place if there is at least one input factor entering the comparison the first subset changed has, and a re-comparison can take place, if at least the target fact and / or fact has changed. alternative but it is also possible Re-compare the actual fact with the target fact if at least one specific input fact has changed.

The presented method allows It uses information from an information pool context-based according to its relevance select which then as temporary Information, for example, shown in a head-up display can be. this makes possible the number of information to be displayed on the current one Driving situation most relevant information to reduce what the Advantage is that the driver has less time to spend in the display after the desired To search for information.

In a development of the method according to the invention, the value of a relevance variable newly determined for an information is added to the current value, ie to the previous value of the relevance variable. In this case, the added relevance value can have both positive and negative values. If the target fact indicates, for example, the safety-relevant minimum distance to the vehicle in front and the actual fact represents the actual distance, then, for example, a drop below the safety distance can lead to an increase in the relevance value. If it is determined at the next comparison that the safety distance is still below the distance and the distance to the vehicle in front possibly even has become smaller, then a positive relevance value to the previous Rele vanzwert added, so that the relevance value continues to increase and eventually meets the presentation condition. If, on the other hand, the distance to the vehicle in front increases and, in particular, the safety distance is exceeded, then a negative value can be added to the relevance value, so that the sum of the old relevance value and newly added value becomes smaller and thus the relevance falls. If necessary, however, the relevance value can also be reset to 0, which may be the case, for example, if the safety distance is no longer undershot.

In In one embodiment of the method, the value of the relevance variable is the same bigger, ever more the actual fact of the target fact in an unwanted Kind deviates.

In In another embodiment of the method, the assignment takes place the relevance size to the target fact associated information in that based on the comparison result formed a comparative size is and the comparison size in one of at least two relevance classes, which different comparison results represent, is classified. The relevance classes can be different for this Target facts different be formed. In addition, you can in the relevance classes beside the target facts also further facts received. The at least two relevance classes are different Values assigned to relevance size. The information is then assigned that value of relevance size, which corresponds to the relevance class into which the comparison variable is classified has been.

in the example shown with the distance warning can be a Relevance class for falling below the safety distance and one for compliance or exceeded the safety distance to be present. The relevance class for falling below then corresponds to a positive relevance value for exceeding a negative one. Alternatively, it is also possible for this class to be crossed to a reset of relevance value to 0.

In an embodiment of the method according to the invention, which the Setting priorities for the presented Information allows may be the default condition for representing the information Fulfills must be dependent on at least one more fact be. As such facts can for example, the comparison results of actual facts with nominal facts, which are not assigned to the information to be displayed serve. this makes possible For example, an information of the navigation system, the actually has a high relevance, with simultaneous presence a distance warning as a further fact, although a lower Has relevance, but requires immediate action to repress. It will In this embodiment, therefore, several conditions checked before an information is displayed as output factor. The priorities can be by selecting the ones to be considered other facts and their leading to consideration Prerequisites are set.

A alternative possibility priorities in presenting information is to set the Relevance size, which the information assigned to the target factum is assigned under consideration certain other facts. So, for example the determined value of relevance size for a navigation display is reduced or even set to 0 if at the same time a distance warning is present. That way you can Relevance values of other information in the presence of a distance warning be modified so that the distance warning is preferred becomes. Again, the prioritization by choice of the considered more facts.

in the inventive method to display information, the information to be presented according to the method of the invention selected for context-based selection of information. The Representing can in particular be visualization on a Display, for example on a head-up display, include. By this way of presentation, there is the advantage that the number of displayed information can be reduced without that information relevant to the driver is withheld. Of the Driver therefore needs to spend less showing up in the display the wished To search for information.

If the information is momentarily displayed in the display, that they are in the peripheral field of view of the observer, through the fade in short cues in the peripheral field of vision created Be the possibility give the driver extra Provide reaction time in critical driving situations.

Further Features, characteristics and advantages of the present invention will become apparent from the following description of an embodiment with reference to the accompanying figure.

The single figure shows a device for carrying out the method according to the invention in the form of a block diagram. Priority of information to be displayed.

Hereinafter, the method of the present invention will be described with reference to FIG 1 illustrated block diagram based on the representation of driving information on a head-up display of a vehicle explained.

The device 1 includes a number of inputs 3a to 3n for receiving signals from sensors of the vehicle. For example, speed sensors, acceleration sensors, radar sensors for automatic distance control or for adaptive cruise control, speed sensors, steering angle sensors, etc. can be used as sensors. The device 1 further comprises at least one input 5 for connecting information or communication devices, such as a navigation system or a system for transmitting traffic warnings. In addition, can also be a memory 7 be present in which vehicle data, which may be of relevance to driving situations, are stored. The memory is programmable in the present embodiment, so that the stored vehicle data can be changed. The over the inputs 3 . 5 and 7 Incoming signals and information form a driving situation representing amount of input facts.

The inputs 3 . 5 and 7 are with a cache 9 connected, in which the input facts remain stored until over the inputs 3 . 5 and 7 new input facts are supplied. The in the cache 9 stored input facts are then overwritten by the new input facts.

With the cache 9 connected are a debit fact determination unit 11 and an actual fact determination unit 13 , These are used to determine at least one target fact and one actual fact from the input facts. Both determination units 11 . 13 For example, arithmetic and / or logical operation units may be used to determine the desired fact or fact.

The device 1 further comprises a comparison unit 15 for receiving the debit fact with the debit fact determination unit 11 and to receive the actual fact with the actual fact determination unit 13 communicates. In the present embodiment, the comparison unit stands 15 also with the cache 9 for the optional reception of at least one input factor in connection. The comparison unit 15 for comparing the determined target fact with the determined actual fact, possibly taking into account an input factor.

One with the comparison unit 15 relevance allocation unit associated with receiving the comparison result 17 serves to assign a specific relevance value to information associated with the target factum based on the comparison result. The information is in one with the relevance allocation unit 17 associated information store 19 saved.

With the relevance allocation unit 17 is a prioritization unit 21 which serves the relevances of the relevance allocation unit 17 determined relevance values based on predetermined priority rules. The prioritization unit 21 is to receive input facts with the cache 9 and for receiving comparison results with the comparison unit 15 connected to allow prioritization taking into account the current driving situation. As an alternative to the illustrated embodiment, the prioritization unit 21 also in the relevance allocation unit 17 be integrated so that the priority rules are already taken into account when determining the relevance values.

Finally, the device includes 1 one with the prioritization unit 21 connected output, via which the from the prioritization unit 21 output information to a display 23 , For example, a head-up display, are passed on, if it has corresponding relevance values and is not suppressed due to a priority scheme.

A context-based selection of information to be displayed on a head-up display in the present exemplary embodiment takes place as follows:
The over the inputs 3 . 5 . 7 Incoming data and information form a set of input facts, which form the basis for the context-based selection of information to be displayed on the head-up display. What information on the head-up display 23 on the one hand depends on their relevance and their priority and on the other hand on the space available on the display. The Relevance and / or priority may arise in particular from the traffic situation.

The data on the traffic situation are via the inputs 3 . 5 . 7 in the cache 9 read. New incoming data and information overwrite the previously stored data and information.

The context of the journey, ie the driving situation, consists inter alia of the roads, the traffic signs and traffic lights as well as the other road users. The driver must primarily follow the road, taking into account the dynamic aspects of the environment, such as the other road users, as well as static aspects, such as traffic signs, signs, etc. Weather conditions also play a role, as well as the condition of the driver, personal preferences, such as sporting or economic driving style, and possibly existing other inmates, such as children. All these factors can be detected by suitable sensors or entered into suitable memory and via the inputs 3 . 5 . 7 the cache 9 respectively. All of these factors serve as input facts in the cache 9 stored, can be summarized to the context of the driving situation.

On the basis of the cache 9 stored input facts are in the process of the invention erfof fen, which can assist the driver in accomplishing his driving task by displaying appropriate information in the head-up display.

To the driving situation is observed, based on certain characteristics Conclusions are drawn and a potential hazard is identified and subsequently an action is executed. For example, if the driver is on a highway and follows Another vehicle with insufficient safety distance exists the danger of a rear-end collision. Will the safety distance for a long time should fall below as an action on a distance warning the head-up display. This example also shows that certain aspects of the environment under certain conditions to rate higher are, as under other conditions. The distance to the vehicle in front Vehicle only gains in importance if it is too low.

The inventive method is able to decide which one in a given situation Information should be displayed to the driver. The driving situation can be considered as a set of facts which describe the current driving condition. Add more Information not directly from the environment of the vehicle can be derived like the destination. Based on these input facts, the appropriate Action in the form of the representation of a particular driving information triggered.

The System works similarly like a driving expert who judges the driving situation and at a potential endangering engages according to his knowledge.

The inventive method choose the Information to be displayed based on the input facts and a control system out. As a control system, for example, a control system in shape the "Java Expert System Shell (JESS) "for Use come. JESS is implemented in Java and is since 1995 has been developed and used many times. It also represents this Control system a comprehensive interface for using JESS in Java programs and high performance of the interference engine to disposal.

As mentioned, represent the various signals and information of the vehicle a set of input facts, based on which in the head-up display to be displayed. This information represent the initial facts of the process there is another type of fact in the rule system, namely the Intermediate facts for execution the rules are necessary.

The Modeling the time course of the driving information via a indirect approach. This approach will determine at any time how relevant the individual driving information is for the driver. Instead of now to track the time course of incoming driving data and using this history to show or hide driving information, are added to any driving information displayed on the head-up display be calculated, relevance values calculated and if necessary priorities taken into account.

The following concrete example should clarify this procedure:
For the above-mentioned display of a distance warning in addition to the actual distance to the vehicle ahead and the speed and the weather and temperature conditions are important. For simplicity, the calculation of the safety distance according to the formula speed divided by 2. On other factors influencing the safety distance, such as the reaction time of the driver, the braking distance of the vehicle, the friction between the tire and the road at this point for simplicity's sake be waived.

Thus, the following driving information is considered for the display of a distance warning: speed, distance to the vehicle ahead, weather conditions and temperature. In the present example, this information forms the information in the buffer 9 read in input facts of the control system.

The Weather and temperature conditions have a direct influence on the safety distance. temperatures below 0 ° C and prolong precipitation the braking distance, dry weather reduces it. To this influence To model, the quotient is modified accordingly. Lies the temperature below 0 ° C and if precipitation prevails, the speed will be 1.2 instead of divided by 2. At temperatures above 0 ° C and precipitation by 1.6 and in all other cases by 2. These values were chosen around the different influences to describe roughly.

The Speed and distance are meant here as continuous, the temperature and weather conditions are assumed to be discrete values become. At the temperature and in the weather conditions could instead of the discrete but also a continuous subdivision meet as it is e.g. with heavy precipitation and high speed can come to aquaplaning.

The mentioned driving information is assigned as a tuple of the class trapping facts. The input facts are modeled as disordered facts with two slots. The first slot represents the name of the driving information, the second the associated value. The JESS syntax for this structure of disordered facts is:

This results in the following structure in JESS for the input factors:
(deftemplate DivFacts (slot name) (slot value))

In addition to the pure driving information, there are other conditions that must be observed when displaying a distance warning. On the one hand, the higher the driving speed, the higher the safety distance. On the other hand, it is often difficult to maintain the safe distance due to heavy traffic in urban areas. Therefore, a distance warning should not be displayed until a certain minimum speed has been exceeded. These dynamic conditions are also modeled driving information as disordered facts with two slots:
(deftemplate dyncondition (slot name) (slot value))

The modeling of the expert knowledge in the form of the if-then rules follows the findings of the risk assessment. First, a desired behavior of the driver is defined in the different driving situations in order to be able to recognize deviations from this behavior. The target behavior is represented by at least one target fact which is in the target fact determination unit 11 on the basis of arithmetic and / or logical operations from a subset of the in the buffer 9 stored input facts is determined. The subset may include only a single fact or all input facts in the extreme cases. Accordingly, the driver's actual behavior is represented in the form of an actual fact which is the actual fact determination unit 13 on the basis of the in the cache 9 stored input facts is determined. For this purpose, a subset of the input facts is used, which in extreme cases can only be a single input factor, but may also include the entire set of input facts.

In the present example, the subset of input facts used to determine the safe distance as a target fact is the input fact set, which consists of the following input facts: speed, weather conditions, and temperature. The input factor, which is used to determine the actual fact, ie the actual distance to the vehicle ahead, is unaffected Lich given by an input factor, namely by the actual distance to the vehicle in front.

In the present example, the speed factor, the weather conditions and the temperature are taken into account to determine the setpoint factor in order to determine the optimum safety distance. In addition, other influencing variables such as the road condition can be included in the determination of the target fact. For the sake of simplicity, however, the input facts in the present concrete example are limited to the three input facts mentioned. The resulting rules can then have the following form, for example:

The weather conditions were interpreted as simple discrete values (rain or sun). The temperature is only included in the calculation if it is below 0 ° C and at the same time precipitation in the form of rain is present. All three rules modify the quotient when calculating the minimum distance (dcquot). The calculation of the optimal safety distance then takes place in the following form:

Once the speed or quotient changes, this rule fires and causes the target fact determination unit 11 the target fact, ie the safety distance (dcmet) is newly determined with the aid of the function f_calcDist. The function f_calcDist divides the current speed by the value in the fact "dcquot".

Of the Degree of deviation of the actual fact from the target fact, in the present For example, the degree of deviation of the distance to the person in front the safety distance can be the height of the hazard potential in this Represent the driving situation, namely then, if the actual Distance is less than the safety distance. The lower the actual Distance is, the faster should be information in the form of a Warning message in the head-up display. The warning message then takes place by a reference to the triggering potential hazard. In the event of too small a safety margin would be the hint in the form of a Show distance warning.

The comparison of the actual fact with the target fact, ie the actual distance with the safety distance, takes place in the comparison unit 15 , This receives from the debit fact determination unit 11 the target fact, in this example the safety margin, and the actual fact determination unit 13 the actual distance as an actual fact. For example, the comparison may be based on the following rule:

On the input side, the current speed, the current distance and the calculated safety distance are entered in this rule. The speed can be used as input factor directly from the buffer 9 in the comparison unit 15 be transmitted. The comparison is performed each time at least one of the facts entering the rule changes. The comparison is carried out in the concrete example on the basis of the following function funcdist 10, whereby a relevance value for the distance warning is determined on the basis of the comparison:

On the basis of the comparison, which arranges in the comparison unit 15 integrated relevance allocation unit 17 a relevance value that depends on the comparison result. If the actual fact, ie the actual distance, is greater than the target fact, ie the safety distance, then the relevance allocation unit is given 17 So a relevance size with the value -10 off. If the actual fact is equal to the target fact, that is, the actual distance is equal to the safety margin, is the relevance allocation unit 17 a relevance variable with the value 0 and if the actual fact is smaller than the target fact, ie the security distance is below, gives the relevance allocation unit 17 a positive value for the relevance quantity, the amount of which depends on the quotient of the actual distance as an actual fact and an input factor, namely the speed. The smaller the actual distance and the higher the speed, the greater the amount. This ensures that the distance warning is faster, the higher the speed and the shorter the distance to the vehicle in front.

In a last step adds the relevance allocation unit 17 the newly determined value of the relevance variable to the previous value of the relevance variable. This means that the relevance decreases if the safety distance is exceeded, the relevance increases, if the safety distance is further undercut and the relevance remains the same, if the safety distance is exactly maintained.

The addition of the relevance size value can be based on the following rule:

The information "distance warning" is represented here by the fact "dist". The facts dist, relevance (rlvc) and color (color) can be read by an external program and have the following structure:

The Faktum Color is usually set to black here but for particularly urgent warnings, for example, switched to red become.

The Values of relevance sizes of all information to be displayed is in the range between 0 and 100. Since in the procedure described, relevance values are above 100 or can come below 0, comprises the inventive method Two more rules that make sure the relevance values in the range between 0 and 100 remain.

In order to make it possible to determine the values of the relevance variables from the overall driving context, the values of the relevance variables in the prioritization unit become 21 modified. Alternatively, modification rules can also be taken into account immediately when calculating the values of the relevance variables. However, the former approach has the advantage that the rule creation can be simplified and a higher modality is possible, since not intervene in the already created rules. The last-mentioned method, on the other hand, offers the advantage that the runtime of the control system can be reduced since not all relevance values are first calculated in order to be subsequently modified.

In the prioritization unit 21 different information to be displayed on the head-up display is assigned different priorities, which may depend, inter alia, on the current driving situation. If, for example, there is a navigation instruction at the same time as the distance warning, the relevance value of the distance warning can be reset to 0 if it is to be expected that the driver will reduce the vehicle speed due to the navigation instruction, for example to turn it off. After a brief glare phase of the navigation instruction, for example after approx. 2 to 3 seconds, this disappears and the relevance values of the distance warning can rise again. The driver does not then immediately after the appearance of a navigation instruction displays a possibly existing distance warning. This allows the driver to adapt to the traffic situation without paternalism through the head-up display.

in the present embodiment For the sake of clarity, the procedure was based on a concrete Example, namely distance warning, described, but the procedure is the same good on all other information to be displayed on the head-up display applicable, provided that they are selected on the basis of the driving context should.

Claims (13)

Method for context-dependent presentation of information, especially on a display where information is dependent from a representing a situation, in particular a driving situation Set of input facts, with the steps: - Determine at least one target fact, which is a representable information is assigned based on a first subset of the set of Input facts - Monitor at least one actual fact, which the at least one target fact assigned; - To compare the at least one actual fact with the at least one desired fact; - Assign a relevance size with a certain value to the target fact associated information the basis of the comparison result and - presenting the information, if the value of relevance size is one given condition fulfilled. Method according to claim 1, in which - a new investigation at least one target fact occurs when at least one has changed certain input factor of the first subset; - another one Compare it actual fact with the target fact occurs when has changed at least the debit fact and / or the actual fact. Method according to Claim 1 or 2, in which at least one additional input factor is included in the comparison received. Method according to claim 3, in which also a renewed Comparing the actual fact with the target fact occurs when has changed at least one incoming input to the comparison. Method according to one of the preceding claims, in the value of a newly determined relevance to the information to the current information Added value of relevance size becomes. Method according to one of the preceding claims, in the value of relevance size all the more is bigger, the more the actual fact from the target fact in an unwanted one Direction deviates. Method according to one of the preceding claims, in the assignment of relevance size to the Target information associated with information is done by: - Form a comparative size the comparison result; - Classification of the comparison size in one of at least two relevance classes, the different comparison results represent and to which different relevance size values are assigned; - Assign the value of the relevance variable for information, which corresponds to the relevance class into which the comparison variable is arranged has been. The method of claim 7, wherein at least one Relevance class a positive value of relevance size and at least one relevance class a negative value is assigned to the relevance size. Method according to one of the preceding claims, in the information is displayed if the value of the relevance size of a exceeds the given threshold and / or if the relevance size value for the information is larger, as the value of relevance sizes for others Information. Method according to one of claims 1 to 9, in which in given condition of at least one input factor and / or depends on a further comparison result. Method according to one of claims 1 to 10, in which the relevance variable, which the information associated with the target factum is assigned to consideration predetermined input facts is modified. Method according to one of the preceding claims, in the displaying an optical representation on a display, in particular on a head-up display. Device for context-dependent presentation of information, in particular on a display, in which information is displayed as a function of a situation representing a situation, in particular a driving situation, amount of input facts, comprising - a desired fact determination unit ( 11 ) for determining at least one target fact by using a first subset of the set of input facts, wherein the target fact is associated with representable information; An actual fact determination unit ( 13 ) for determining at least one actual fact using a second subset of the set of input facts; One with the debit fact determination unit ( 11 ) for receiving the at least one target fact and the actual fact determination unit ( 13 ) for receiving the at least one actual fact associated comparison unit ( 15 ) for comparing the target fact with the actual fact and for determining a comparison quantity representing the comparison result; - one with the comparison unit ( 15 ) for receiving the comparison variable associated relevance allocation unit ( 17 ) for assigning a relevance quantity on the basis of the comparison quantity to the information associated with the target factum; and a presentation unit ( 23 ) for presenting the information depending on the relevance size.