CN110116619B

CN110116619B - Method for displaying information in a head-up display HUD of a vehicle

Info

Publication number: CN110116619B
Application number: CN201910110255.6A
Authority: CN
Inventors: A.卡斯纳; M.亨宁
Original assignee: Volkswagen AG
Current assignee: Volkswagen AG
Priority date: 2018-02-06
Filing date: 2019-02-11
Publication date: 2023-07-04
Anticipated expiration: 2039-02-11
Also published as: DE102018201768B4; DE102018201768A1; CN110116619A

Abstract

The invention relates to a method for displaying information in a head-up display (HUD) of a vehicle. A gaze area (10) of a driver of the vehicle is determined and preferably kept free from each presentation of projections of the HUD. Furthermore, the remaining projection surface (20) of the HUD is divided into different display areas (21, 22,23, 24), wherein each display area (21, 22,23, 24) is set up for displaying further information (31, 32,33, 34). In particular, the first display region (21) is arranged at a larger distance from the viewing region (10) than the second display region (22). The first information (31) is displayed in the first display area (21) and is different from the second information (32) displayed in the second display area (22).

Description

Method for displaying information in a head-up display HUD of a vehicle

Technical Field

The invention relates to a method for displaying information in a head-up display (HUD) of a vehicle, in particular information projected into a windshield of a motor vehicle. The invention further relates to a display system with a HUD and a controller for executing the method according to the invention, and to a motor vehicle with a display system according to the invention.

Background

Head-up displays (HUDs) are display systems that have been used in aviation for decades and are also increasingly used in motor vehicles. The concept of a head-up display is derived here from the feature of the display system that the display content is projected into the field of view (Sichtfeld) of the user. Thus, the user does not have to match his Head pose (kopfhalteng) nor his gaze direction (blickrich), e.g. low Head ("Head-down") in order to perceive the display. It should therefore be made possible for the user to point his field of view uninterruptedly onto the area in front of the aircraft or vehicle. Typically, HUDs are based on the projection of display content onto a transparent screen in front of the user, such as, for example, the windshield of a vehicle.

In the case of conventional display devices (as for example a screen arranged in the dashboard of a vehicle), the event occurring before the vehicle is temporarily imperceptible to the user in the case of seeing on the display device. The possibility thus always exists that the reaction time of a user is so prolonged that the user cannot respond in time to a potentially dangerous event. Although the user of the HUD may point his line of sight uninterrupted onto the area in front of the vehicle, there is a risk that the display covers or at least worsens the perceptibility of events occurring in front of the vehicle. In the case of HUDs there is thus always the problem of a most suitable presentation of the content (sometimes also referred to as illustration), as for example in view of the positioning of the content and the transparency or the duration of its presentation.

Different methods for presenting display content on a head-up display of a vehicle are already known from the prior art.

Document EP 2 990 266 A1 discloses a method for presenting a warning cue (Warnhinweise) by means of a HUD. The warning prompts presented here correspond to different types of automatically recognized hazards. Furthermore, the form of presentation of the warning message is adapted to the importance or real-time (aktopalit ä t) of the identified hazard. In this case, the representation is always projected into a position corresponding to the identified hazard.

Document US 2014/0268353 A1 describes an Augmented-Reality System (Augmented-Reality-System) for displaying three-dimensional navigation cues. In this case, a large number of graphic elements are projected by means of the HUD onto different focal planes (Fokalebene) in the vehicle windshield in such a way that a spatial effect is produced overlapping the surroundings. Different information is presented by means of different graphic elements. In this case, the presentation is mostly implemented in the driver's gaze area (fixionbereich).

According to DE 10 2014 000 803 A1, traffic-related information is presented in principle in the marginal region of the driver's line-of-sight field (Blickfeld). Since the marginal region of the line-of-sight field is stationary, the user can, however, also observe the presented information in the region of his clear vision, i.e. in the central foveal field (fovealen Gesichtsfeld). Thus, the observation of the presented information always requires a change in the line of sight direction.

In document US 2013/007887 A1 a display method is described in which a graphic presentation is always projected onto the HUD in the direction of the driver's line of sight. The necessity for a head movement or eye movement of the driver should thus be further minimized, for example during cornering. Additionally, less important information may always be displayed at a fixed point outside the driver's gaze direction. In the case of this method, there is disadvantageously the risk that the driver is tired or tired due to the continuous position change of the presented information.

Document DE 10 2004 060 380 A1 discloses a method for displaying information by projecting the information onto a windshield of a vehicle by means of a HUD display of the vehicle, wherein the information, for example an indication for route guidance, is presented separately on the windshield in two areas above and below the driver's field of view.

Document US 2016/0 004 076 A1 discloses a method for displaying information as a projection onto a windscreen, wherein an upper region is projected onto the windscreen by means of an upper light source and a lower region is projected onto the windscreen by means of a lower light source.

Document DE 10 2015 116 980 A1 discloses the presentation of information by means of a plurality of display devices and in a plurality of display areas that are separated from one another.

Document DE 10 2007 058 437 A1 discloses a method for presenting information by means of a HUD display, which display comprises a plurality of adjacent display areas (anzeigefield).

Document DE 10 2012 020 009 A1 discloses a method in which information is represented by means of a HUD system in each case only in a part of the maximum display area.

It is common to the methods known from the prior art that the presentation of information directly in the direction of the driver's line of sight is generally regarded as positive. The risk of traffic events (verkehrsgischehen) important for the driver being covered is therefore taken too little attention. The arrangement away from the direction of the driver's gaze makes the application of HUDs however generally obsolete and thus likewise disregarded.

Disclosure of Invention

The invention is based on the object of providing a method for displaying information in a head-up display of a vehicle, which overcomes the disadvantages of the prior art and makes it possible to display information and to optimize the visibility of the surroundings of the vehicle.

This object is achieved by a method for displaying information, a display system and a vehicle.

The method according to the invention for displaying information in a head-up display HUD of a vehicle has at least the following method steps. In a first step, a gaze area of a driver of the vehicle is determined. In the context of this patent application, the area of gaze is taken to mean the area on or through which the driver directs his or her attention as standard during driving. In other words, one or more main line-of-sight directions of the driver are within the gaze area during travel within an average time (im Zeitmittel) or the gaze area is defined by these main line-of-sight directions. A viewing area is an area in which the driver mainly sees the surroundings during driving, or a part of the projection surface of the HUD (windshield) through which the driver mainly sees during driving.

The presence of such a viewing area of the driver of the vehicle is demonstrated by empirical studies, for which reference is made, for example, to the publication Lappi et al (2017) Systematic Observation of An Expert Driver's size Strategy-An On-Road Case study, front. Psychol.8:620.doi:10.3389/fpsyg.2017.00620, the content of which is hereby fully incorporated by reference. Different possible approaches for determining the gaze area are described below with reference to a preferred implementation of the method. In the method according to the invention, the gaze area is preferably constant and in particular does not change with any change in the direction of the driver's gaze.

In a further step of the method according to the invention, the projection surface of the HUD is divided into separate display areas depending on the distance from the gaze area. In particular, the projection surface minus gaze area is segmented. Alternatively, it is preferred that the projection surface of the HUD is defined in dependence on the distance relative to the mapping of the gaze area onto the projection surface of the HUD. The projection area represents the entire area of the transparent screen or windshield, in which the presentation of information by means of the HUD can be realized in principle. Due to the constant viewing area, the distance to the viewing area and thus the position of the different display areas is likewise constant in the method according to the invention.

In particular, the projection surface of the HUD is divided into at least a first display region and a second display region, wherein the second display region is different from the first display region, and wherein the first display region has a larger distance relative to the gaze region than the second display region. Preferably, the display area is a dedicated non-overlapping area. The gaze area is preferably part of the projection surface, alternatively a mapping of the gaze area onto the projection surface may be used for distance determination. The distances here preferably relate to the smallest distance of the regions, that is to say to the smallest distance between the point of the gaze region and the point of one of the display regions. Alternatively, it is preferred that these distances relate to the area's center of gravity of the face.

Within the scope of the invention, each display area is suitable for presenting information by projection of the HUD. In particular, in the method according to the invention a first information is presented in a first display area and a second information is presented in a second display area, wherein the second information is different from the first information. In the method according to the invention, different information is therefore specifically associated with different distances from the gaze area. The classification of the differently presented information is preferably also carried out and the order of the information (Ordnung) resulting from the classification is mapped onto a metric (metric, sometimes also referred to as a metric) with respect to the gaze area.

The projection of the information onto the projection surface is not mandatory in the context of the present invention, in the sense that the information is presented on the projection surface and can be observed, for example, at different viewing angles. Instead, the projection of the information into the field of view of the driver via the projection surface by means of the HUD is achieved. The projection surface is used in particular for reflecting the projected information into the field of view of the driver. Due to the transparency of the screen or windshield, this reflection is achieved as at a semi-transparent mirror. Thus, the driver may perceive the information projected by the HUD overlapping the surrounding environment behind the windshield. Preferably, the virtual image point of the projected information is located in the surrounding.

It is known that the intensity of the conscious perception (bewusste Wahrnehmung) of information (intelnst ä t) decreases with increasing distance from the foveal field (i.e. the clearly visible region). The perceived information content outside the foveal field, i.e. in the region of peripheral vision, is more strongly unconsciously processed. The scanning frequency (abtestfreequenz), that is to say the temporal resolution, is significantly higher in the peripheral vision region than in the foveal vision. Thus, although less conscious awareness may be appropriate to react to the perceived sensory impression (Sinneeindruck) of the surroundings, as long as the psychological activity for the corresponding reaction (Geistest ä tigkey) does not exceed a certain amount of cognitive expenditure. This psychological knowledge is achieved in the method for displaying information in such a way that a targeted selection of which information contents are displayed in a certain distance from the gaze area of the vehicle driver is achieved. Thus, the cognitive stress (kognitive Beanspruchung) of the driver is minimized and the driving experience thereof is improved.

According to the invention, the association of the model of the driving task according to dones (below) with the recognition of the gaze area of the driver results in the fact that in the method according to the invention, the different information contents are preferably presented in the associated display area in such a way that the perceived effort for processing the information displayed in the defined display area is inversely proportional to the distance of the display area from the gaze area. In other words, the more conscious awareness and processing requires certain information, which is displayed according to the invention closer to the gaze area of the driver.

In a preferred embodiment of the method according to the invention, the gaze area overlaps the projection surface of the HUD. In other words, the gaze area is arranged in the projection plane, i.e. in a plane which can in principle be used for presenting the display content. According to this implementation of the method according to the invention, the gaze area preferably remains free of projections of the HUD. In other words, the presentation of the display content is not performed in the gaze area. This may mean that virtual image points of the information projected into the driver's gaze field are not arranged within the gaze area. Since the content presented in the region of interest is almost imperatively perceived by the driver, this embodiment makes it possible for the driver to focus advantageously carelessly on the surroundings, in particular on the region of interest. Thereby, the driving safety and the individual driving experience are further improved.

It is also preferred that the projection surface is arranged on at least a part of a windshield of the vehicle. Particularly preferably, the projection surface extends almost completely from the lower edge of the windscreen to the upper edge of the windscreen. The area of the windscreen behind it or above which the color bar (tstrap, sometimes also referred to as color bar) is located is preferably excluded from the projection plane. It is also preferred that the projection area extends over the entire width of the windscreen or at least over the area of the windscreen which is in front of the driver.

Furthermore, it is preferred that the mapping of the gaze area, in particular of the gaze area, onto the windshield of the vehicle is formed by a plurality of intersections between the directions of the lines of sight of the driver, which occur in a concentrated manner, and the windshield of the vehicle. It is also preferred that the direction of the driver's gaze is at least temporarily acquired or determined by means of at least temporarily acquired measurement data. For this purpose, a large number of techniques for so-called Eye Tracking (Eye Tracking) are known from the prior art to the expert. Particularly preferably, camera-based technology and cameras, for example, fitted in a rear view mirror, are used for this purpose. Advantageously, the intersection with the plane of the windshield and thus the gaze area can be determined mathematically by means of the parameterized gaze direction of the driver. It is particularly preferred that the gaze area is learned only once (for example in the case of commissioning of the vehicle (sometimes also called start of operation) or in the case of selection of a new driver) and then remains unchanged.

Alternatively, the main line of sight direction of the driver is preferably estimated by means of other measurement data, for example by means of the driver's seat setting (Sitzeinstellung). Additionally, additional data (such as, for example, input of the body dimensions of the driver) may be used for the estimation of the gaze direction. It is particularly preferred that further information, for example the conventional position of the area outside the vehicle and mainly gazed at by the driver, is used for determining the gazing area of the driver, for example as position information relative to the vehicle.

Furthermore, the viewing area preferably has a width which corresponds to the projection of the intersection between the lane travelled by the vehicle and a horizontal line, in particular perceived by the driver of the vehicle. The projection of the intersection line is preferably effected approximately along the direction of the driver's line of sight and toward the windshield of the vehicle. According to this embodiment, the gaze area can likewise be determined by means of a camera located in or at the vehicle and by means of a map of the surroundings surrounding the vehicle. Furthermore, the vertical height of the gaze area is preferably smaller than its horizontal width.

Since the viewing area is preferably a projection of a further road area onto the windshield of the vehicle of the driver in the direction of the line of sight of the driver at the level of the horizontal line, the viewing area is preferably arranged in the upper third of the projection plane and if appropriate in the upper third of the windshield of the vehicle. In a particularly simple implementation of the method according to the invention, the gaze area is only determined in the case of vehicle development as a standardized size for the vehicle. Such a standardized gaze area may be stored in a controller of the vehicle.

In a particularly preferred embodiment of the method according to the invention, a distance measure (abstandby metric) of the display area with respect to the gaze area is linked in the projection plane to the psychological driving behavior pattern. The driving behavior pattern is preferably an adaptation of a "three-plane model" (Drei-Ebenen-models) to the guidance of the vehicle. The "three-plane model" is described in the publication of Skills, rules, and knowledges, signs, sings, and symbols, and other distinctions in human performance models, IEEE Trans. Systems, man, cybernetics, SMC-13 (1983), pp.257-266, which is hereby fully incorporated by reference.

The "tri-planar model" distinguishes among (a) servo motor skill based behavior (skill based), (b) rule based behavior (rule based), and (c) knowledge based behavior (knowledgebase based), among others. Here, the skills-based behavior (a) is first based on stimulus-response-automatic behavior, the regulation-based behavior (6) is first based on the entire program of social behavior (repotoire) and the knowledge-based behavior (c) is based on conscious decisions and plans.

This "three-plane model" to driving task has been achieved in 1982 by means of dones (see, for example, "Handbuch Fahrerassistenzsysteme: grundlagen, komponenten und Systeme f u r aktive Sicherheit und Komfort", springer press, pages 2011,15 to 18, which are hereby fully referred to). Thus, in the case of a driving mission, the navigation mission, including decisions on route and time course, is associated with knowledge-based behavior (c), guidance of the vehicle, including derivation of the guiding quantity such as nominal trajectory (Sollspur) and nominal speed by means of driving destination and current surroundings, is associated with regulation-based behavior (b), and stabilization of the vehicle, including minor turning and acceleration processes for matching the actual trajectory and actual speed to the nominal quantity, is associated with technology-based behavior (c).

The application of this model based on the "three-plane model" of the driving task according to dones in the method according to the invention results in a particularly preferred information distribution as a function of the distance from the gaze area. In a particularly preferred embodiment of the method according to the invention, the first display region is arranged in a region of the surrounding vision of the driver of the vehicle. Furthermore, the first information preferably has information for the stabilization of the vehicle. Particularly preferably, the information for stabilization is content for lane limiting, for example when the lane edges on the side are not visible or are missing in dark or humid situations. For this purpose, the lane edges are preferably detected by means of vehicle sensors or read by map material (Kartenmaterial). It is also preferred that the information for stabilization is a hint for the actual speed if the hint exceeds, for example, the allowable speed. For this purpose, the speed limit is preferably read by means of vehicle sensors and compared with the actual speed.

Particularly preferably, the first information is presented as a graphical alert element. It is particularly preferred that the first information is presented in an enhanced form, that is to say in an overlapping manner with the surroundings which are actually perceived by the driver.

Also preferably, the second display region is arranged between the first display region and the gaze region. Particularly preferably, not only the first but also the second display area is arranged below the gaze area. The second information is preferably information for road guidance of the vehicle (Bahnf u hrung). The second information thus preferably relates to the next driving operation, i.e. for example lane change, turning or turning around. Particularly preferably, the second information is presented in an enhanced form, that is to say overlapping the surroundings which are actually perceived by the driver. In an exemplary embodiment, the second information is a directional arrow, which is projected into the HUD in such a way that it overlaps the currently driving lane. Preferably, the arrow is generated by comparing the GPS location of the vehicle with map material.

The application of the model of the driving task according to dones in the method according to the invention furthermore leads to a further cutting of the projection surface at least into the third display region. The third display region is different from the first display region and the second display region and has a smaller distance from the gaze region than the first display region. Preferably, the third display region likewise has a smaller distance to the gaze region than the second display region. In the third display area, third information is displayed, which is different from the first information and the second information.

In a preferred embodiment, the third display region is arranged above the gaze region or between the second display region and the gaze region. Further, the third information is preferably information for navigation of the vehicle. Thus, the display of the navigation data is advantageously effected close to the horizontal line, where it is read by the driver and can be handled consciously. The third information may be, for example, the name of the destination (nenhung), the distance to the destination, and the direction to the destination. The data relative to the destination preferably corresponds to an input in the navigation system of the vehicle or is read by the navigation system.

In a further preferred embodiment of the method according to the invention, a fourth display area for displaying fourth information independent of the driving task is at least temporarily displayed along the lower edge of the projection surface. It is also preferred that the fourth display region is displayed in the projection plane at the maximum possible distance relative to the gaze region. It is particularly preferred that the fourth display area is only temporarily presented. In other words, the display of the fourth display area is effected only for a predetermined time, for example after an input by the driver or after expiration of a determined period of time. According to this embodiment, the fourth display region can overlap a further display region, particularly preferably the first display region. The fourth information independent of the driving task is thus less weighted or classified according to the invention than all information associated with the driving task. The fourth Information is different from the first, second and third Information, and is particularly preferably Infotainment-Information.

The method steps of the method according to the invention can be implemented by means of electrical or electronic components or parts (hardware), by means of firmware (ASIC) or by means of a suitable program (software) in the case of implementation. Also preferably, the method according to the invention is implemented or carried out by a combination of hardware, firmware and/or software. For example, the individual components for carrying out the individual method steps are configured as individually integrated switching circuits (Schaltkreis) or are arranged on a jointly integrated switching circuit. The individual components which are provided for carrying out the individual method steps are furthermore preferably arranged on a flexible printed circuit carrier, a printed circuit carrier (PCB), a tape carrier package (Tape Carrier Package) (TCP), or other suitable substrate.

The individual method steps of the method according to the invention are furthermore preferably configured as one or more processes which run on one or more processors in one or more electronic computers and which occur in the case of the implementation of one or more computer programs. The computer is preferably designed to work with other components, such as a projector of the HUD, and one or more sensors or cameras, in order to achieve the functionality described therein. Here, the commands of the computer program (Anweisung) are preferably stored in a memory, like for example a RAM element. The computer program may however equally be stored in a non-volatile storage medium, such as e.g. a CD-ROM, a flash memory or the like.

It is furthermore obvious to a person skilled in the art that the functionalities of a plurality of computers (data processors) may be combined or combined in a single instrument, that the functionalities of a determined data processor may be distributed over a large number of instruments in order to implement the steps of the method according to the invention without deviating from the method according to the invention.

Another object of the invention relates to a display system for a vehicle, having a head-up display HUD, which is set up for projecting information onto a windshield of the vehicle. Suitable HUDs are known to those skilled in the art from the prior art. The projection surface of the HUD preferably extends over the entire windshield, particularly preferably over almost the entire height of the windshield and likewise preferably over a section of the windshield located in front of the driver. Furthermore, the display system according to the invention has a controller which is set up to execute the method according to the invention. In this case, it may be a control unit which is specifically associated with the display system or a control unit of the vehicle in which the display system is arranged.

A vehicle with a display system according to the invention is likewise the object of the invention. In a vehicle, the method according to the invention is thus performed as described above. The display contents are presented in the display region of the divided projection surface (windshield) in such a manner that the smaller the distance between the display contents and the viewing region of the driver is, the more consciously perceived the display contents need to be presented. The display content is thus divided into exclusive non-identical information, at least into first information and second information (different from the first information), which are presented in exclusive non-overlapping display regions, at least in the first display region and in the second display region (different from the first display region).

The different embodiments of the invention mentioned in this application can advantageously be combined with one another, as long as they are not additionally implemented in individual cases.

Drawings

The invention is explained below in the examples with the aid of the figures. Wherein:

FIG. 1 shows a schematic illustration of a driver's line of sight through a windshield of his vehicle;

fig. 2 shows a schematic illustration of a projection surface of a HUD according to a first implementation;

fig. 3 shows a schematic illustration of a projection surface of a HUD according to a second implementation; and is also provided with

Fig. 4 shows a schematic illustration of a projection surface of a HUD according to a third implementation.

List of reference numerals

10. Gaze area

20. Projection surface

21. A first display area

22. A second display area

23. A third display area

24. Fourth display area

31. First information

32. Second information

33. Third information

34. Fourth information

41. Intersecting line (Schnittliie)

42. Lane

43. Horizontal line

50. A windshield.

Detailed Description

Fig. 1 shows a schematic illustration of the line of sight of a driver through a windshield 50 of his vehicle in the case of the vehicle traveling on a lane 42 of a road. As was also investigated by Lappi et al, the driver focuses his attention on the area of the lane 42 at the level of the horizontal line 43 as a standard. The width B of the viewing area 10 thus corresponds approximately to the width of the projection onto the windshield 50 of the vehicle along the direction of the driver's line of sight from the intersection 41 between the horizontal line 43 and the lane 42. The vertical height V of the fixation area 10 is smaller than its width B, so that overall an approximately elliptical fixation area 10 is obtained, the longer main axis of which is the so-called intersection 41.

Fig. 2 shows a schematic illustration of a projection surface 20 of a head-up display HUD of a vehicle according to a first embodiment of the method according to the invention. The projection surface 20 here extends almost over the entire height of the windscreen 50. Only the uppermost section of the windscreen 50 is excluded in order to avoid driver eye-catching (sometimes also called blinding) in the case of viewing the projected display content. The projection surface 20 is arranged such that it overlaps almost the entire visible section of the road travelled by the vehicle in front of the driver, in particular the right-hand lane 42 on which it is travelling. The viewing area 10 at the level of the horizontal line 43 is arranged completely within the projection plane 20.

The display content is not presented at all in the gaze area 10, so that the driver experiences distraction (Ablenkung) with a free line of sight in the gaze area 10 towards his surroundings. The remaining projection surface 20 is partially divided into a first display region 21 and a second display region 22, which are arranged separately from one another and do not overlap below the gaze region 10 in the projection surface 20. The first display region 21 extends from the lower edge of the projection surface 20 upwards, and the second display region 22 is arranged between the first display region 21 and the viewing region 10.

According to a first embodiment presented in fig. 1, first information 31 is displayed in first display area 21, wherein it is used in particular for lane keeping (spighalten) and for graphic warning prompts (Warnhinweise) for keeping a standard speed (richtgelschwandrigkeit). In the second display area 22, a second message 32 is displayed, wherein this is in particular an operating arrow (Man foster) which overlaps the lane 42 in an enhanced manner and signals a next operation, such as, for example, a lane change (spirwichsel) or a curve driving (Kurvenfahrt). The driver can thus obtain a graphical warning indication of the first information 31 on the periphery and nevertheless react appropriately by means of a small steering turn (lenkinschlag) and an acceleration or braking process. In order to process the operating arrow of the second information 32, a higher awareness input (kognitiver Einsatz) on the part of the driver is necessary. Because the second display area 22 is displayed closer to the gaze area 10, the driver perceives the second information 32 less peripherally, which eases his conscious handling.

Fig. 3 shows a schematic illustration of a projection surface 20 of a head-up display HUD of a vehicle according to a second embodiment of the method according to the invention. This projection surface differs from the projection surface 20 in fig. 2 in that the second display area 22 fills the entire projection surface 20 between the first display area 21 and the horizontal line 43. As a result, the second information 32, in particular the enhancement of the operating arrow (augmentor ung), can be adapted better to the actual events of the surroundings, for example the multipass (mehrspiigkey) of the motor vehicle lane (sometimes also referred to as the driving route). Further, the first display area 21 and the first information 31 are not different from those described with reference to fig. 2.

The projection surface 20 represented in fig. 3 is further divided into a third display region 23, which is arranged above the horizontal line 43 and the gaze region 10 in the projection surface 20. In the third display area 23, navigation data is displayed as third information 33. The navigation data 33 include, in particular, the current distance of the travel destination (Fahrziel) to the travel destination and the direction of the travel destination. Such information is read from the navigation system of the vehicle.

The driver must consciously perceive the navigation data 33 and take a knowledge-based decision as to whether the presented destination guidance and route is correct or whether he agrees to these. The third display region 23 is therefore arranged particularly close to and above the gaze region 10. Since the portion of the projection surface 20 arranged above the gaze area 10 is smaller than the portion of the projection surface 20 arranged below the gaze area, the third information 33 is arranged at the gaze area 10 closer in the middle than the first information 31 and than the second information 32. This positively affects the conscious perceptibility of the navigation data 33. The illustration of the navigation data above the gaze area 10 is likewise provided, since an enhancement of the navigation data 33 is unnecessary.

Fig. 4 shows a schematic illustration of a projection surface 20 of a head-up display HUD of a vehicle according to a third embodiment of the method according to the invention. The projection surface differs from the projection surface 20 shown in fig. 3 in that the fourth display region 24 is temporarily presented overlapping the first display region 21. The fourth display region 24 is directly adjacent to the lower edge of the projection surface 20 and thus has the greatest possible distance from the viewing region 10. In the fourth display area 24, fourth information 34 is displayed which is independent of the driving task.

The fourth information 34 should be such that the driver is as little distracted as possible by the driving task and is thus arranged at the greatest possible distance from the viewing area 10. The fourth information 34 is, inter alia, information about Infotainment, such as the name of the music title played (Musiktitel), RDS information and sender information, or the like. The fourth display area 24 is only temporarily presented, in particular after a driver input and/or only after a certain period of time and for a certain period of time. The graphical warning cue 31, which is displayed only partially in synchronization with the fourth information 34, is therefore only temporarily obscured and the driving task can be reliably fulfilled.

Claims

1. A method for displaying information (31, 32) in a head-up display HUD of a vehicle, having the following method steps:

-determining a gaze area (10) of a driver of the vehicle;

-dividing the projection surface (20) of the HUD into at least one first display area (21) and a second display area (22) different from the first display area (21), wherein the first display area (21) has a larger distance relative to the gaze area (10) than the second display area (22); and is also provided with

-displaying a first information (31) in the first display area (21) and a second information (32) different from the first information (31) in the second display area (22),

wherein the information shown is classified as first information (31) or second information (32) on the basis of a driving behavior pattern, so that the cognitive effort for processing the information (31, 32, 33) displayed in the display area (21, 22, 23) is inversely proportional to the distance of the display area (21, 22, 23) relative to the gaze area (10).

2. The method according to claim 1, wherein the gaze area (10) overlaps a projection surface (20) of the HUD, further comprising the following method steps:

-keeping the gaze area (10) free from projections of the HUD.

3. The method according to claim 1 or 2, wherein the projection surface (20) is arranged on at least a portion of a windshield (50) of the vehicle.

4. The method according to any of the preceding claims, wherein the gaze area (10) is formed by a number of intersections between frequently occurring directions of the driver's gaze and a windscreen (50) of the vehicle.

5. The method according to claim 4, wherein the driver's gaze direction is at least temporarily acquired or determined from at least temporarily acquired measurement data.

6. The method according to any of the preceding claims, wherein the horizontal width (B) of the gaze area (10) coincides with the width of a projection of an intersection (41) between a lane (42) travelled by the vehicle and a horizontal line (43) onto a windscreen (50) and along the direction of the driver's line of sight.

7. The method according to any of the preceding claims, wherein the gaze area (10) is arranged in an upper third of the projection surface (20) and/or in an upper third of a windscreen (50) of the vehicle.

8. Method according to any of the preceding claims, wherein the first display area (21) is arranged in an area of peripheral vision of a driver of the vehicle and/or wherein the first information (31) has information for stabilizing the vehicle.

9. The method according to any one of the preceding claims, wherein the second display area (22) is arranged between the first display area (21) and the gaze area (10), and/or wherein the second information (32) has information for road guidance of the vehicle.

10. The method according to any of the preceding claims, further having the step of:

-dividing the projection surface (20) into a third display area (23) different from the first display area (21) and the second display area (22), wherein the third display area (23) has a smaller distance relative to the gaze area (10) than the first display area (21); and is also provided with

-displaying third information (33) different from the first information (31) and the second information (32) in the third display area (23).

11. The method according to claim 10, wherein the third display area (23) is arranged above the gaze area (10) and/or the third information (33) has information for navigation of the vehicle.

12. Method according to any of the preceding claims, wherein a fourth display area (24) for displaying fourth information (34) independent of driving tasks is at least temporarily presented along a lower edge of the projection surface (20).

13. A display system for a vehicle, having:

-a head-up display, HUD, for projecting information onto a windscreen (50) of the vehicle; and

-setting up a controller for performing the method according to any of claims 1 to 12.

14. A vehicle with a display system according to claim 13.