WO2007017325A2

WO2007017325A2 - Method for the context-based selection of information and device for displaying the same

Info

Publication number: WO2007017325A2
Application number: PCT/EP2006/063961
Authority: WO
Inventors: Martin Dienelt; Oliver MÄCKEL
Original assignee: Siemens Aktiengesellschaft
Priority date: 2005-08-08
Filing date: 2006-07-06
Publication date: 2007-02-15
Also published as: WO2007017325A3; DE102005037288A1

Abstract

The invention relates to a method for the context-based display of information, especially on a display, whereby information is displayed depending on a set of input facts representing a situation, especially a driving situation. The inventive method comprises the following steps: determining, based on a first subset of the set of input facts, at least one desired fact (11) which is associated with an information that can be displayed; monitoring at least one actual fact (13) which is associated with the at least one desired fact; comparing (15) the at least one actual fact with the at least one desired fact; associating (17), based on the result of comparison, a relevance variable having a defined value with the information associated with the desired fact; and displaying the information (23) when the value of the relevance variable meets a defined condition.

Description

description

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

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

In modern means of transport, for example in automobiles, a large number of control devices is used. The number of control devices will continue to increase in future through the introduction of new control devices and the expansion of existing technologies. Examples include the so-called "Lane Departure Warning", ie the warning in the event of deviation from the lane, the complete visibility around the vehicle, but also in infotainment systems in the vehicle.

Even today, the complexity of operating devices and representing device and vehicle messages poses a major challenge to the driver. New operating concepts, as proposed by some automakers, represent possible solutions to assist the driver in his or her operating tasks. One of these For example, concepts provide for gesture-based interaction with the systems in the vehicle.

The representation or representation of information is predominantly acoustic or optical via the conventional display instruments in the cockpit. A disadvantage of the display of driving information in the instrument cluster of the cockpit is the fact that the driver has to avert the view from the traffic to read the necessary driving information. Depending on the amount of information in the display instruments, valuable time elapses until the driver has the desired information. recorded and looked back at the traffic situation.

One way to avoid the eye-drops from the traffic, so-called Head-Up Displays (HUDs) is. With this technology, it is possible to show the driver certain driving information directly into the windshield. The driver therefore no longer has to avert his gaze from the traffic situation if he wants to ascertain driving information such as the current speed. Such a head-up display essentially comprises a semitransparent glass pane, which is mounted in the driver's direct sea field, and a projector for generating the information to be displayed, which can be realized for example by a TFT screen with a particularly high luminosity.

Originally, the concept of the head-up display originated in aviation, where it serves to display the primary display instruments. However, unlike aviation, automotive head-up displays are not counted among the primary gauges. In the automotive sector, it is more important to present changes in the environment, such as other road users or the road, on the head-up display. Therefore, the picture does not appear in the driver's direct sea field, but for example directly above the hood at an optical distance of about 2m to 4m 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 a fixation of attention, the driver fixes certain elements of the head-up display, ie the driver pays all his attention to one on the head-up display. Display recognized information, and therefore recognizes changes in traffic only with a certain time delay, or in the worst case, even though he does not turn his gaze from the traffic. In H. Bubb, et al. Results of a literature review and own experiments, VDI reports No. 948, VDI is therefore required to display only so-called contact-analogue driving information in head-up displays.With head-up displays is between contact-analogue and not - contact-analogue representation distinguished

Forms of presentation 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 fixing 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 to be displayed.

The object of the present invention is therefore to provide a method and a device with which information, in particular visual information to be displayed on a head-up display, can be selected and displayed context-based.

The first object is achieved by a method for context-based selection of information according to claim 1, the second object by an apparatus according to claim 13. 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.

Assigning a relevance variable with a specific value to the information associated with the target fact on the

Basis of 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 satisfies a predetermined condition. The prescribed For example, a condition may be that the value of the relevance variable must be the largest value of all relevance variables assigned to a piece of information so that the associated information is displayed. As a further example, it is possible to make the exceeding of a relevance threshold by the value of the relevance variable a condition for presentation. 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 method according to the invention, at least one target fact can be re-determined if at least one input variable of the first subset has changed, and a new comparison can take place if at least the target fact and / or the actual fact changes has or have. Alternatively, however, it is also possible to perform a new comparison of the actual fact with the target fact if at least one specific input factor has changed.

The proposed method makes it possible to contextually select information from an information pool according to its relevance, which can then be displayed as temporary information, for example in a head-up display. This makes it possible to reduce the number of information to be displayed to the information most relevant in the current driving situation, which has the advantage that the driver has to spend less time looking for the desired information in the display.

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 reference variable. In this case, the added relevance value can have both positive and negative values. If the target fact is about the safety-relevant minimum distance to the vehicle ahead indicates and the actual fact represents the actual distance, so for example, falling below the safety distance can lead to an increase in relevance value. If, in the next comparison, it is determined that the safe distance is still below the distance and the distance to the vehicle in front has possibly even decreased, then a positive relevance value is added to the previous relevance value, so that the relevance value increases further and eventually fulfills 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 one embodiment of the method, the value of the relevance variable is greater the more the actual fact deviates from the target fact in an undesired manner.

In a further refinement of the method, the assignment of the relevance variable to the information associated with the target fact occurs in that a comparison variable is formed on the basis of the comparison result and the comparison variable is classified into one of at least two relevance classes which represent different comparison results. The relevance classes can be formed differently for different target facts. In addition, the relevance classes can include additional facts in addition to the target facts. The at least two relevance classes are assigned different values of relevance size. The information is then assigned the value of the relevance variable which corresponds to the relevance class into which the comparison variable has been classified. In the example shown with the distance warning, a relevance class for falling below the safety distance and one for maintaining or exceeding the safety distance can be present. The relevance class for falling below then corresponds to a positive relevance value that is negative for exceeding. Alternatively, it is also possible for this class to result in a reset of the relevance value to 0.

In one embodiment of the method according to the invention, which makes it possible to set priorities for the information to be displayed, the predetermined condition that must be fulfilled for the presentation of the information can be made dependent on at least one further fact. As such facts, for example, the comparison results of actual facts with desired facts, which are not assigned to the information to be displayed, serve. This makes it possible, for example, to suppress information of the navigation system, which is in fact of high relevance, at the same time as there is a distance warning as a further fact, which has a lower relevance but requires immediate action. Thus, in this embodiment, several conditions are checked before information is displayed as an output factor. The priorities can be set by selecting the additional facts to be taken into account and their preconditions for taking them into account.

An alternative way of setting priorities in presenting information is to modify the relevance size associated with the information associated with the desired fact, taking into account certain additional facts. For example, the determined value of the relevance variable for a navigation display can be reduced or even set to 0 if there is a distance warning at the same time. In this way, relevance values of others Information in the presence of a distance warning are modified so that the distance warning is preferably displayed. Again, prioritization can be done by choosing the additional facts to consider.

In the method for presenting information according to the invention, the information to be displayed is selected according to the context-based selection of information according to the invention. The presentation may in particular include visual presentation on a display, for example on a head-up display. By this type of presentation, there is the advantage that the number of displayed information can be reduced without the driver relevant information is withheld. The driver therefore has to spend less time looking for the desired information in the display.

If the information is temporarily displayed in the display in the peripheral field of view of the operator, fading in the peripheral visual field can be created by fading in, giving the driver additional reaction time in critical driving situations.

Further features, properties 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.

The method according to the invention will be explained below with reference to the block diagram shown in FIG. 1 on the basis of the representation of driving-relevant information on a head-up display of a vehicle. The device 1 comprises 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, for example a navigation system or a system for transmitting traffic warnings. In addition, there may also be a memory 7 in which vehicle data, which may be of relevance for driving situations, are stored. The memory is programmable in the present embodiment, so that the stored

Vehicle data can be changed. The signals and information arriving via inputs 3, 5 and 7 form a set of input facts representing the driving situation.

The inputs 3, 5 and 7 are connected to a latch 9, in which the input facts remain stored until new inputs are supplied via the inputs 3, 5 and 7. The input facts stored in the buffer 9 are then overwritten by the new input facts.

Connected to the buffer 9 are a desired fact determination unit 11 and an actual fact determination unit 13. These are used to determine from the input facts at least one target fact and one actual fact. Both determination units 11, 13 may comprise arithmetic and / or logical operation units for determining the desired fact or the actual fact.

The device 1 further comprises a comparison unit 15, which is used to receive the target fact with the target fact determination unit 11 and to receive the actual fact with the Actual fact determination unit 13 is in communication. In the present exemplary embodiment, the comparison unit 15 is also connected to the latch 9 for the optional reception of at least one input factor. The comparison unit 15 for comparing the determined target fact with the determined actual fact, possibly taking into account an input factor.

A relevance allocation unit 17, which is connected to the comparison unit 15 for receiving the comparison result, serves to assign a specific relevance value to information which is assigned to the desired factum on the basis of the comparison result. The information is stored in an information memory 19 connected to the relevance allocation unit 17.

A priority unit 21, which serves to modify the relevances of the relevance values determined by the relevance allocation unit 17 on the basis of predetermined priority rules, is connected to the relevance allocation unit 17. The prioritization unit 21 is connected to the buffer 9 for receiving input facts and to the comparison unit 15 for receiving comparison results in order to enable prioritization taking into account the current driving situation. As an alternative to the illustrated exemplary embodiment, the prioritization unit 21 may also be integrated into the relevance allocation unit 17, so that the priority rules are already taken into account when determining the relevance values.

Finally, the device 1 comprises an output connected to the prioritization unit 21, via which the information output by the prioritization unit 21 is forwarded to a display 23, for example a head-up display, provided it has corresponding relevance values and is not suppressed due to a priority control , A context-based selection of information to be displayed on a head-up display in the present exemplary embodiment takes place as follows:

The data and information entering via the inputs 3, 5, 7 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. The information to be displayed on the head-up display 23 depends, on the one hand, on its relevance and priority and, on the other hand, on the space available on the display. The relevance and / or the priority may arise in particular from the traffic situation.

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

The context of the journey, ie the driving situation, is u. a. from the streets, the traffic signs and traffic lights as well as 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 means of suitable sensors or entered into suitable memories and fed via the inputs 3, 5, 7 to the buffer 9. All these factors, which are stored as input facts in the buffer 9, can be summarized in the context of the driving situation.

Based on the input facts stored in the buffer 9, decisions are made in the method according to the invention. which can assist the driver in mastering his driving task by displaying corresponding information in the head-up display.

For this purpose, the driving situation is observed, based on certain characteristics conclusions are drawn, and it is detected a potential hazard and then carried out an action. For example, if the driver is on a motorway and is following another vehicle at a safe distance, there is a risk of a rear-end collision. If the safety distance is exceeded for a long time, an interval warning should therefore be displayed on the head-up display as an action. This example also shows that certain aspects of the environment are, under certain conditions, to be rated higher than under other conditions. The distance to the vehicle ahead wins only when it is too low.

The method according to the invention is capable of deciding in a particular situation which information is available to the person

Driver should be displayed. The driving situation here can be regarded as a set of facts describing the current driving state. In addition, further information that can not be directly derived from the environment of the vehicle, such as the destination. On the basis of these input facts, the appropriate action is triggered in the form of the representation of a specific driving information.

The system thus works in a similar way to a driving expert who assesses the driving situation and intervenes in case of a potential hazard according to his knowledge.

The inventive method selects the information to be displayed on the basis of the input facts and a control system. For example, a control system in the form of the "Java Expert System Shell (JESS)" can be used as the control system JESS is implemented in Java and has been developed since 1995. disgusted and already used many times. In addition, this control system provides a comprehensive interface for using JESS in Java programs and high performance of the interference engine.

As mentioned, the various signals and information of the vehicle represent a set of input facts on the basis of which the information to be displayed in the head-up display is selected. This information is the starting point of the procedure. There is also another type of fact in the rule system, namely the intermediate facts necessary to execute the rules.

The modeling of the time course of the driving information takes place via an indirect approach. With this approach, it is determined at any time how relevant the individual driving information is for the driver. Instead of tracking the time profile of the incoming driving data and using this route to show or hide driving information, relevance values are calculated for each driving information that is to be displayed on the head-up display and, if necessary, priorities taken into account.

The following concrete example illustrates this procedure:

For the above-mentioned display of a distance warning, the speed as well as the weather and temperature conditions are important in addition to the actual distance to the vehicle in front. For simplicity, the calculation of the safety distance according to the formula speed divided by 2. On other factors with respect to 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 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 input facts of the control system read into the buffer 9.

The weather and temperature conditions have a direct influence on the safety distance. Temperatures below ⁰ C and precipitation extend the braking distance, dry weather reduces it. To model this influence, the quotient is modified accordingly. If the temperature is lower than ⁰ ° C and there is precipitation, the speed is divided by 1,2 instead of 2. At temperatures above ⁰ ° C and precipitation by 1.6 and in all other cases by 2. These values were chosen to roughly describe the different influences.

The speed and the distance should be assumed as continuous, the temperature and weather conditions as discrete values. At the temperature and in the weather conditions, instead of the discrete but also a continuous subdivision could be met, as it is e.g. In case of heavy precipitation and high speed, aquaplaning can occur.

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:

(deftemplate <deftemplate-name> [extends <classname>] [<doc-comments>] [(slot <slot-name> [(default / default-dynamic <value>)] [(type <typespec>))] * ) 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 expert knowledge in the form of if-then rules is based on 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 factum which is determined in the target fact determination unit 11 based on arithmetic and / or logical operations from a subset of the input facts stored in the latch 9. The subset may include only a single fact or all input facts in the extreme cases. Accordingly, the actual behavior of the driver is represented in the form of an actual fact which is determined by the actual fact determination unit 13 on the basis of the input facts stored in the latch 9. 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 that is used to determine the safety margin as a target factum 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 in front, is given only 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 factors, 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:

(defrule rulerain

(DivFacts (name DivWeather) (value? C &: (eq? C "rain")))

=> modify? dcquot (value 1.6))

(defrule rulesun

(DivFacts (name DivWeather) (value? C &: (eq? C "sun")))

=> modify? dcquot (value 2.0))

(defrule modDistQuot

(DivFacts (name DivTemp) (value? C & (<? C 0))) (DivFacts (name DivWeather) (value? V & (eq? V "rain"))) => modify? Dcquot (value 1.2))

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 there is precipitation in the form of rain. 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:

(defrule calcOptDist

(DynCondition (name DistQuot) (value? C)) (DivFacts (name DivSpeed) (value? V)) => (modify? Dcmet (value (f_calcDist? V? C))))

As soon as the speed or the quotient changes, this rule fires and causes the target fact determination unit 11 to recalculate the setpoint fact, ie the safety distance (dcmet), with the aid of the function f_calcDist. The function f calcDist divides the current speed by the value in the fact "dcquot".

The degree of deviation of the actual fact from the target fact, in the present example the degree of deviation of the distance to the vehicle ahead to the safety distance, can represent the level of hazard potential in this driving situation, namely when the actual distance is less than that safety distance. The smaller the actual distance, the faster information should be displayed in the form of a warning message in the head-up display. The warning is then issued by a reference to the triggering potential hazard. In the case of too small a safety distance, the hint would appear in the form of a 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 target fact determination unit 11, the target fact, in the present example, the safety margin, and from the actual fact determination unit 13, the actual distance as actual Fact. For example, the comparison may be based on the following rule:

(defrule compDists (DynCondition (name DistMet) (DivFacts (name DivDist) (value? distis)) (DivFacts (name DivSpeed) (value? currspeed)) => (modify dcr / vce (value integer () funcdist 10? distopt

? distis? currspeed))))

On the input side, the current speed, the current distance and the calculated safety distance are entered in this rule. The speed can be transmitted as an input factor directly from the latch 9 in the comparison unit 15. 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:

(deffunction funcdistlO (? dopt? dis? cspeed) (if (?? dis? dopt) then return -10 else

(if (=? dis? dopt) then return 0 else (if (<? d? dopt) then return (/? cspeed

"diss))))) On the basis of the comparison, the relevance allocation unit 17 integrated in the comparison unit 15 assigns a relevance value that depends on the comparison result. If the actual fact, that is to say the actual distance, is greater than the setpoint fact, that is to say the safety distance, then the friction mapping unit 17 gives a relevance variable with the

Value -10 off. If the actual fact is equal to the target fact, so the actual distance equal to the safety distance is, the relevance allocation unit 17 outputs a relevance variable with the value 0 and if the actual fact is smaller than the target fact, ie the safety distance is below, the relevance allocation unit 17 outputs a positive value for the relevance size whose Amount of the quotient of the actual distance as an actual fact and an input factor, namely the speed, depends. 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, the relevance allocation unit 17 adds 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:

(defrule addDistRlvce)

(DynCondition (name DistRlvce) (value? Newx)) => (modify? Dist (rlvce (+ (fact-slot-value? Dist rlvce)? Newx))))

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:

(deftemplate item (slot name) (slot rlvce (type INTEGER) (slot color (default black)))

The Color fact is usually set to black, but can be switched to red if there are particularly urgent warnings.

The values of the relevance variables of all the information to be displayed are in the range between 0 and 100. Since relevance values of more than 100 or less than 0 can occur in the procedure described, the method according to the invention comprises two further rules which ensure that the relevance values are in the intended range stay between 0 and 100.

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 21 are 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. On the other hand, the last-mentioned method 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 short break Blend phase of the navigation instruction, for example, after about 2 to 3 seconds, this is hidden and the relevance values of the distance warning can rise again. The driver then does not immediately receive a previously existing distance warning immediately after the appearance of a navigation instruction. This allows the driver to adapt to the traffic situation without paternalism through the head-up display.

In the present embodiment, the method of the

For the sake of clarity, however, the method is equally applicable to all other information to be displayed on the head-up display, provided that they are selected on the basis of the driving context.

Claims

claims

1. A method for context-dependent presentation of information, in particular on a display, in which information is displayed as a function of a situation, in particular a driving situation, representative amount of input facts, comprising 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;

- monitoring at least one actual fact associated with the at least one desired fact;

- comparing the at least one actual fact with the at least one target fact; Assigning a relevance variable with a specific value to the information associated with the target factum on the basis of the comparison result and

- Presenting the information if the value of the relevance variable meets a predetermined condition.

2. The method according to claim 1, in which

- A new determination of at least one target fact occurs when at least a certain input factor of the first subset has changed; a new comparison of the actual fact with the target fact occurs if at least the desired fact and / or the actual fact has changed.

3. The method of claim 1 or 2, in which enters into the comparison at least one additional input factor.

4. The method of claim 3, in which a re-comparison of the actual fact with the target fact occurs when at least one incoming input into the comparison factor has changed.

5. The method as claimed in one of the preceding claims, in which the value of a relevance variable newly determined for information is added to the current value of the relevance variable.

6. The method according to any one of the preceding claims, in which the value of the relevance size is greater the more the actual fact deviates from the target fact in an undesired direction.

7. The method according to any one of the preceding claims, in which the assignment of the relevance size to the target fact associated information is carried out by:

- forming a comparison quantity based on the comparison result; Classifying the comparison variable into one of at least two relevance classes, which represent different comparison results and to which different values of the relevance variable are assigned;

- Assigning the value of the relevance variable to the information that corresponds to the relevance class into which the comparison variable has been classified.

8. The method according to claim 7, in which at least one relevance class is associated with a positive value of the relevance variable and at least one relevance class with a negative value of the relevance variable.

9. Method according to one of the preceding claims, in which the information is displayed if the value of the relevance value exceeds a predefined threshold value and / or if the value of the relevance variable for the information is greater than the value of the relevance variables for other information.

10. The method according to any one of claims 1 to 9, in which depends on the predetermined condition of at least one input factor and / or a further comparison result.

11. The method according to any one of claims 1 to 10, in which the relevance size, which is assigned to the information associated with the target factum, is modified taking into account predetermined input facts.

12. The method according to any one of the preceding claims, in which the displaying an optical representation on a display, in particular on a head-up display comprises.

13. An apparatus 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

- a target fact determination unit (11) for determining at least one target fact 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;

- a comparison unit (15) connected to the target fact determination unit (11) for receiving the at least one target fact and to the actual fact determination unit (13) for receiving the at least one actual fact for comparing the target fact with the actual fact and for determining a comparison variable representing the comparison result; a relevance allocation unit (17) connected to the comparison unit (15) for receiving the comparison variable for allocating a relevance variable on the basis of the comparison variable to the information associated with the target factum; and

a presentation unit (23) for displaying the information as a function of the relevance variable.