JP2002081953A - Method for regulating zoom of chart display system of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for regulating a zoom of a chart display system of a vehicle and to enhance flexibility of the system of this type. SOLUTION: The zoom is regulated depending upon a variable zoom coefficient capable of being calculated by the chart display system.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a zoom adjustment method for a chart display system for a vehicle according to the preamble of claim 1.

[0002]

2. Description of the Related Art Well-known chart display systems,
So-called "man-machine interface" for vehicles, for example
In a chart display system of a navigation system in the field of (Human Mashine Interface: HMI), the zoom is fixedly adjusted in a state preselected by the vehicle user. In this case, the vehicle user must voluntarily select a moderate zoom as desired to derive appropriate information from the chart display system. Furthermore, information beyond the chart display for the presented section or route can only be recalled in known chart display systems within the range of the individual detailed markings of the presented section. A disadvantage of the information of these known chart display systems is that they are relatively inflexible and not user-friendly.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for adjusting the zoom of a vehicle chart display system and to increase the flexibility of such a system.

[0004]

This problem is solved by a method for performing a zoom adjustment dependent on a variable zoom factor calculated by a chart display system.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A zoom adjustment method for a chart display system of a vehicle according to the present invention is characterized in that the zoom adjustment is performed depending on a variable zoom coefficient calculated by the chart display system. The variable zoom factor is automatically calculated via the chart display system so that the zoom adjustment of the chart display system is adapted to the actual driving situation that is actually occurring in the vehicle. In this way, it is possible to concentrate the output or display of the chart information, for example, the section section obtained on the local road network, only in the area necessary for the vehicle user at that time. In this way, the chart display system automatically adapts the zoom to the current driving situation of the vehicle, so that the vehicle user can reliably and quickly convert the desired or necessary information into a properly enlarged chart section. It can be obtained by displaying it on a display unit. This allows the vehicle user to be less distracted by the surrounding chart display system and to concentrate on the original road traffic. Here, a convenient zoom adjustment is performed here by the chart display system, so that no direct intervention by the vehicle user takes place.

Advantageously, the zoom factor is at least one of the vehicle
It is calculated depending on the amount of change determined in advance with the two drive parameters. As a result, each required zoom factor adapted to the driving condition is calculated, and optimal zoom adjustment via the chart display system is enabled. The zoom factor is optimized automatically depending on the vehicle operation, without direct intervention of the vehicle user. Thereby, the zoom adjustment is guaranteed, and the vehicle user can quickly and reliably obtain desired information or necessary information via the chart display system.

[0007] Preferably, the drive parameter is the vehicle speed. The vehicle speed is particularly suitable as a drive parameter for calculating the zoom factor. This is because it affects the time it takes a vehicle user to get the required information and make an appropriate decision. When the vehicle speed is low, the vehicle user can obtain information about the current section section determined using more time than when the vehicle speed is high. From this it can be concluded that the calculated zoom factor is relatively large when the vehicle speed is low and that the zoom factor is relatively small when the vehicle speed is high. Here, it should be understood that the larger the zoom coefficient, the higher the degree of detail display and the smaller the display section of the chart. The smaller the zoom factor, the lower the degree of detail display and the larger the display section of the chart. The vehicle user is therefore not overly provided with a great deal of detail information at high vehicle speeds, and at a relatively slow vehicle speed the desired specific individual information can be provided within a defined time in a chart display system. Receive through.

[0008] Preferably, the minimum operating time interval set for calculating the zoom factor is taken into account. This prevents the calculation of a new zoom factor in the case of rapid and short-term speed changes, and prevents the vehicle user from being unnecessarily distracted by the chart display system for the constantly updated chart display. .

[0009] The zoom factor is preferably calculated as a function of the interval data stored in the chart display system. The section data stored in the chart display system includes information on relevant points (section positions involved in the determination of the vehicle user) for the vehicle user to make a decision, for example, intersections and approach points, and so on. Relevant points can be considered. This calculates the appropriate zoom factor and guarantees an optimized zoom adjustment with respect to the stored section data.

Preferably, the zoom factor is calculated as a function of the section length between the respective current position of the vehicle and the next relevant point. Here, the relevant point is to be understood as a position or place where the vehicle user should make a decision relating to the section.
That is, the related point is, for example, an intersection, an approach point, or the like. Basically, the vehicle user seeks to obtain information from the chart display system for at least the next relevant point. The section length and vehicle speed between the respective current position of the vehicle and at least the next relevant point, so that the vehicle user can use a sufficiently long perception time to recognize and process the respective information. Are advantageously taken into account when calculating the zoom factor.

[0011] Advantageously, the next relevant point is a section location where the vehicle user should make a decision relating to the section. The section position at which the vehicle user should make a decision relating to the section or the section position at which the traveling characteristic is to be changed is itself a relevant point. The zoom factor is therefore calculated in particular depending on the next relevant point. Here, the decision relating to the section is, for example, a decision relating to a traveling section or a decision relating to a reduction in traveling speed (decision relating to traveling characteristics).

According to an advantageous embodiment, the next relevant point is a section position in which the vehicle can be reached at the current vehicle speed from the respective current position for more than a predetermined minimum time. The predetermined minimum time is, for example, 1 min. And the next relevant point is the next section position to be determined, which is 1 min. From the current position at the earliest. It is a position where the vehicle can reach later at the current vehicle speed. The vehicle user thereby obtains information about the current position and the next relevant point via the chart display system, but this ensures that this vehicle user always has enough time to perceive and process the information. Here, in order to display the chart section on the display unit of the chart display system,
The current position and at least the next relevant point are displayed in the central area of the chart section, taking into account additional peripheral zones relating to the travel section between the current position and at least the next relevant point. This allows the vehicle user to perceive this well and quickly.

Preferably, the minimum time is variable for each vehicle user. Since the minimum time required to perceive and process the information varies by vehicle user, it is advantageous to be able to control the minimum time individually. This is because in this case it is guaranteed that the various chart sections can be displayed on the display unit of the chart display system in an exactly user-friendly display sequence.

Another advantageous embodiment of the invention follows from the following description.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a first embodiment of the present invention.

FIG. 1 shows a block diagram 10 of a road map display device in a general chart display system, particularly in a vehicle navigation system (not shown). Chart display system 1
0 has an associated point data memory unit 11, a section data memory unit 13, and a vehicle speed measurement unit 15, which are indicated by arrows 12, 14, 16;
The zoom factor calculation unit 17 via a data transmission line or data transmission function (software) indicated as
Working connected. The zoom factor calculation unit 17 is functionally connected to a display unit 19 of the chart display system 10 via a data transmission line or data transmission function (software) indicated by an arrow 18. Furthermore, a setting unit 20 is operatively connected to the zoom factor calculation unit 17 via a data transmission line or data transmission function (software) indicated by an arrow 21. The setting unit 20 allows the vehicle user to, for example, view a temporal chart display sequence or display unit 19.
Used to enter the priority of the information displayed above.

The appropriate zoom factor is calculated by the unit 17 as a function of the relevant point data (memory unit 11), the section data (memory unit 13) and the data relating to the current vehicle speed (measurement unit 15). Therefore, when calculating an appropriate zoom factor, the current traveling speed of the vehicle is also taken into account in addition to parameters such as time, current position information, and chart data. This adjusts the temporal chart display sequence to a range visible to the human eye at various zoom factors. This means that when the vehicle speed is high, only a relatively small number of relevant points (detailed information) of the traveling section are displayed on the display unit 1.
In contrast to this, when the traveling speed of the vehicle is low, it means that a relatively large number of relevant points and thus corresponding detailed information are displayed.

For example, zoom adjustments when the vehicle is traveling on an autobahn are made so that the next big city or the next autobahn intersection is displayed on the display unit 19 of the chart display system 10. 130km /
At an average speed of h, for example, only section points (related points) outside the radius of 2 km around the current position of the vehicle are considered.

If the vehicle is traveling on a city road at a speed of, for example, 50 km, a road intersection outside a radius of 1 km is considered.

When a vehicle is traveling at 100 km / h on a national road, a road intersection with another national road, an approach road or an entry point, or an adjacent residential area is, for example, 2 km from the national road on which the vehicle is traveling at that time. If it is outside the radius of, the relevant point is considered and the zoom is adjusted accordingly so that it is displayed in the map section of the display unit 19.

The zoom factor calculation unit 17 is configured as a so-called central processing unit CPU which is suitable for reliably and quickly calculating section sections and zoom factors.
In this way, the appropriate zoom factor can be calculated automatically and without further intervention of the vehicle user and displayed on the display unit 19 accordingly. This allows the vehicle user to obtain information about the next relevant point within a minimum amount of time and make a corresponding decision. To maintain the minimum time, the current vehicle speed is used by the zoom factor calculation unit 17 as an input quantity for the appropriate selection or determination of the relevant point, as described above.

[Brief description of the drawings]

FIG. 1 is a block diagram of a chart display system of the present invention.

[Explanation of symbols]

 Reference Signs List 10 Chart display system 11 Related point data memory unit 12, 14, 16, 18, 21 Data transmission line 13 Section data memory unit 15 Vehicle speed measurement unit 17 Zoom coefficient calculation unit 19 Display unit 20 Setting unit

Claims (9)

[Claims] 1. A zoom adjustment method for a chart display system of a vehicle, wherein the zoom adjustment is performed depending on a variable zoom coefficient calculated by the chart display system (10). 2. The method according to claim 1, wherein the zoom factor is calculated as a function of a predetermined change of at least one driving parameter of the vehicle. 3. The method according to claim 1, wherein the driving parameter is a vehicle speed. 4. The method as claimed in claim 1, wherein a predetermined minimum operating time interval is taken into account when calculating the zoom factor. 5. The method as claimed in claim 1, wherein the zoom factor is calculated as a function of interval data stored in the chart display system. 6. The method as claimed in claim 1, wherein the zoom factor is calculated as a function of the section length between the current position of the vehicle and the next relevant point. 7. The method according to claim 1, wherein the next relevant point is a section position at which the vehicle user should make a decision relating to the section. 8. The method according to claim 1, wherein the next relevant point is a section position at which the vehicle can reach at the current vehicle speed over a predetermined minimum time from the current position. 9. The method according to claim 1, wherein the minimum time is variable for each vehicle user.