JP3409641B2 - Display device for vehicles - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle display device capable of improving the visibility of a specific area such as an urban area.

[0002]

2. Description of the Related Art As a conventional vehicle display device, for example, there is a car navigation system as shown in FIG. In the figure, 1 is a display means capable of color display such as TFT liquid crystal or CRT, 2 is a main control section as a control means for performing arithmetic processing such as display according to various inputs, and 3 is G
Vehicle position detection input signals such as PS signals, 4 are vehicle speed signals, gyro signals, side brake signals, shift position signals, etc. for checking running conditions, and 5 are side lights and headlamps (hereinafter referred to as H / L). Display brightness change signal for changing the brightness of the display means such as ON signal and measurement result of environmental illuminance, and 8 is a CD containing information about terrain, roads, buildings, etc. A recording medium such as a ROM, and 6 is a data reading device for reading data from the recording medium 8. Then, based on the own vehicle position detection signal 3 and the running state confirmation input signal 4, the own vehicle position such as the latitude and longitude of the current vehicle is obtained, and information such as topography, roads, buildings, etc. near the own vehicle position is obtained. Is read from the recording medium 8 by the data reading device 6, arithmetically processed by the main controller 2 and displayed on the display means 1. In consideration of visibility, the brightness of the display color is controlled by the display brightness switching signal 5 corresponding to the environmental illuminance such as the side-lighting signal and the illuminance sensor signal. In this case, although there are a plurality of color tables, only one color table is used for drawing on one screen.

The display colors and brightness of the display means 1 are FBs for each of the three primary colors (red, green, blue) as a color table.
The values are listed. The FB value is an integer value obtained by normalizing the input voltage for controlling the luminance of the phosphor in the CRT or the input voltage for controlling the transmittance of the liquid crystal with 5 to 8 bits. When the display means 1 is a CRT, it has a characteristic called γ value. On the other hand, there is an example such as a map book of FIG. 6 as a three-dimensional display of the terrain, which is painted in different colors according to the altitude value,
Application to vehicle display devices is expected. With such display, three-dimensional topography can be drawn if there is altitude data.

[0004]

However, in such a conventional vehicular display device, for example, in the case of terrain display in which the color changes depending on the altitude, the color range is widened under a certain brightness condition. It is necessary to take, and different hues are assigned to elevations and displayed. For this reason, because the specific area with a special meaning and the other part have the same display color, it is not possible to recognize the specific area of the map information, and the display color is sensible especially in the display of urban areas, There was a problem that they did not fit conceptually.

The present invention has been made by paying attention to such conventional problems. First, it improves the visibility of a specific area such as an urban area, and provides a display color that does not cause a sense of incongruity. Second, it is possible to achieve both three-dimensional topographical display while being a specific area such as an urban area. Third, while the vehicle is running, the driver can easily display the specific area in a short time. An object is to provide a display device for a vehicle that can be recognized.

[0006]

In order to solve the above-mentioned problems, the invention according to claim 1 is a vehicle display device for displaying at least map information of roads, terrain, etc., and stores at least map information. Storage means, display means for displaying the map information stored in the storage means, map information selection means for selecting map information of a predetermined area from the map information stored in the storage means, and display corresponding to the altitude A first color table having colors and a second color table different from the first color table are stored, and the first color table stores the change in display color corresponding to the change in altitude in the second color table. Whether the color table storage means set larger than the color table and the map information selected by the map information selection means includes a predetermined specific area. And the specific area determination means for determining,
Control means for performing elevation display of the specific area on the display means in a display color corresponding to the second color table when the specific area determination means determines that the specific area is in the map information; The summary is that With this configuration, the determined specific area is three-dimensionally displayed on the screen in the display color for the specific area.

According to a second aspect of the present invention, in the vehicle display device according to the first aspect, the second color table has a plurality of color tables, and the specific area is determined by the specific area determining means. In this case, the gist is to display the altitude of the specific area with a display color corresponding to one of the second plurality of color tables depending on the type or degree of the specific area. With this configuration, since the color table is changed according to the type and degree of the specific area, it is easy to understand what the specific area is.

[0008]

According to a third aspect of the present invention, in the vehicle display device according to the first or second aspect, when the specific area is an urban area, the determination of the urban area is made based on a unit area based on the recorded map information. Number of telephone numbers per building, number of buildings, number of places, width and number of roads, number of population, number of restaurants, number of convenience stores, distance from station, prefectural office or city hall, or at least one of latitude and longitude of the city The point is that it is configured to do. With this configuration, it is possible to easily determine the urban area, specifically, based on the population density obtained from the recorded map information.

The invention according to claim 4 is the same as claims 1 and 2 above.
In the vehicle display device according to any one of 1 and 3, the display color of the specific area and the display color of the area other than the specific area have opposite hues or a hue difference of 60 degrees to 300 degrees.
The point is that it is in the range of degrees. With this configuration, the specific area can be surely recognized easily.

The invention according to claim 5 is the above-mentioned claim 1,
In the vehicular display device described in any one of 2, 3, and 4, the gist is to change the display color of the specific area according to the display area on the screen of the specific area. With this configuration, when the display area on the screen of the specific area is small, for example, the change amount of the display color corresponding to the altitude or the like is reduced or fixed.

According to a sixth aspect of the present invention, in the vehicular display device according to the fifth aspect, the display area on the screen of the specific area is resolution × 5 or more from the resolution or the spatial frequency characteristic of the human eye, or It is a gist to change the display color of the topography of the specific area by changing the altitude only in the case of 0.238 cpd × 5 or more. With this configuration, specifically,
When the display area on the screen of the specific area is resolution × 5 or less, the change amount of the display color corresponding to the altitude or the like is reduced or fixed.

According to a seventh aspect of the present invention, in the vehicle display device according to the first aspect, the map selected by the map information selecting means when the vehicle is determined to be traveling based on the traveling state recognition signal. It is a gist to display the entire area of information only in a display color corresponding to one of the first color table and the second color table. With this configuration, even when the vehicle is traveling, it becomes easy to recognize the specific area in a short time.

According to an eighth aspect of the invention, in the vehicle display device according to the third aspect, when displaying the urban area, the number of telephone numbers, the number of buildings, the number of place names per unit area,
The gist is to change the saturation of the display color according to the size of the width and number of roads, the number of people, the number of restaurants, and the number of convenience stores. With this configuration, the vividness of the display color changes depending on the population density, the number of restaurants, and the like when determining the urban area.

According to a ninth aspect of the present invention, in the vehicle display device according to the first aspect, there is provided a vehicle position detecting means for detecting a vehicle position, and the map information selecting means detects the vehicle position. The gist is to select map information of a predetermined area including the map information. With this configuration, information in the vicinity of the vehicle position is read from the recorded map information and a specific area is determined. Then, a specific area including the determined own vehicle position is three-dimensionally displayed with a display color that conceptually matches the specific area and with a coloring corresponding to the altitude in the display color.

[0016]

According to the first aspect of the present invention, there is provided a vehicle display device for displaying at least map information such as roads and terrain, at least storage means for storing the map information, and the storage means for storing the map information. Display means for displaying map information, map information selecting means for selecting map information of a predetermined area from the map information stored in the storage means, a first color table having a display color corresponding to the altitude, and A second color table different from the first color table is stored, and the first color table is set so that the change in display color corresponding to the change in altitude is larger than that in the second color table. Color table storage means, specific area determination means for determining whether or not there is a predetermined specific area in the map information selected by the map information selection means, and If it is determined that the specific area in the map information by a specific area determining means, said second
Since the control means for displaying the altitude of the specific area on the display means in the display color corresponding to the color table is provided, the specific area is three-dimensionally displayed on the screen in the display color for the specific area. Thus, the visibility of the specific area can be improved, and the specific area can be displayed in a display color that does not cause a sense of incongruity. Also,
Even if there is a difference in elevation in the specific area, it is possible to reduce the difference in color, which makes it easier to grasp the area of the specific area.

According to the second aspect of the present invention, the second color table has a plurality of color tables, and when the specific area is determined by the specific area determining means, it is determined by the type or degree of the specific area. , By displaying the elevation of the specific area with a display color corresponding to one of the second plurality of color tables, the color table is changed according to the type and degree of the specific area. It is possible to make it easier to understand if it is a specific area.

[0018]

According to the third aspect of the present invention, when the specific area is an urban area, the determination of the urban area is performed by determining the number of telephone numbers, the number of buildings, the number of place names per unit area from the recorded map information. Road width and number, population, number of restaurants, number of convenience stores, station, distance from prefectural office or city hall, or at least latitude and longitude of the city, so it is easy to determine the city. It can be carried out.

According to the fourth aspect of the present invention, the display color of the specific area and the display color of the area other than the specific area have opposite hues or have a hue difference of about 60 to 300 degrees. , It is possible to surely improve the visibility of a specific area.

According to the invention of claim 5, the display color of the specific area is changed in accordance with the display area of the specific area on the screen. When the size is small, it is possible to suppress a decrease in visibility of the specific area.

According to the sixth aspect of the present invention, the display area on the screen of the specific area is resolution × 5 or more or 0.238 cpd × 5 from the resolution or the spatial frequency characteristic of the human eye.
Only in the above cases, the display color of the terrain of the specific area is changed and displayed. Therefore, specifically, when the display area on the screen of the specific area is resolution × 5 or less, By making the display color the same color or the like without corresponding to the altitude or the like, it is possible to suppress the reduction in the visibility of the specific area.

According to the invention of claim 7, the entire area of the map information selected by the map information selecting means is
Since only the display color corresponding to one of the color table and the second color table is displayed, the specific area can be easily recognized in a short time even when the vehicle is traveling.

According to the invention of claim 8, when the city area is displayed, the number of telephone numbers per unit area, the number of buildings, the number of place names, the width and number of roads, the number of population, the number of restaurants, and convenience stores. According to the size of the number of stores,
Since the display color is changed in saturation, it is possible to improve the visibility of a specific area by changing the vividness of the display color according to the population density, the number of restaurants, etc. when determining an urban area. There are many display variations,
You can enjoy viewing the display.

According to the ninth aspect of the invention, the vehicle has a vehicle position detecting means for detecting the vehicle position, and the map information selecting means selects the map information of a predetermined area including the vehicle position. As a result, the display color of the specific area including the vehicle position is conceptually matched to the specific area, and the color corresponding to the altitude is added to the display color to improve the visibility of the specific area. Can be made.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIG.
It will be described with reference to FIG. The display device for a vehicle of the present embodiment is intended to improve the visibility of map information by displaying the display color of a specific area such as an urban area in the display of topographical information, etc., while changing the display color from other portions. There is. First, the configuration of the vehicular display device will be described with reference to FIG. In FIG. 1, the same or equivalent blocks as those in FIG. 5 are designated by the same reference numerals as those used above, and the duplicated description will be omitted. In FIG. 1, reference numeral 7 is a CD containing information about the terrain (elevation) near the vehicle position, roads, buildings, etc. (generally national information) and required information such as a plurality of color tables.
-A recording medium such as a ROM. The current vehicle position is obtained by inputting the vehicle position detection signal 3 and the traveling state confirmation signal 4 to the main control unit 2, and further the map information in the vicinity of the vehicle position is read from the recording medium 7 to read the information such as urban areas. Determine a specific area. Therefore, both the signal input section for the vehicle position detection signal 3 and the traveling state confirmation signal 4, the recording medium 7 and the main control section 2 constitute a specific area determination means.

The recording medium 7 has a second color table as display color data for displaying the altitude for the specific area region and a first color data for displaying the altitude other than the specific region area. The color table is recorded. In the first color table, the display color is changed according to the altitude, such as brown for mountains and green for green areas. Further, the second color table is different from the first color table, for example, red in the case of an urban area, and the display color of red is changed according to the altitude. This second color table has a basic display color depending on the type and degree of the specific area (whether it is a large city or a middle city), for example, dark red in a large city and intermediate red in a middle city. You may do it.
Further, the first color table and the second color table may have the same or different changes in display color corresponding to changes in altitude.

Next, the display control action of the main controller 2 on the display means 1 will be described in order.

The determination of the specific area and the display control operation for the display means 1 based on the determination result will be described with reference to the flowchart of FIG. The current vehicle position is obtained by inputting the vehicle position detection signal 3 and the traveling state confirmation signal 4 to the main controller 2 (step 101). Information about the terrain, roads, buildings, etc. near the vehicle position is read from the recording medium 7 via the data reading device 6 (step 102), and in the same manner as this, features such as parks and green spaces, municipalities, special Data for determining a specific area such as a facility, an industrial area, a residential area, or an urban area is read (step 103). Now
When considering the urban area as a specific area, the input information for determining the urban area is the number of telephone numbers, the number and width of roads, the number of buildings, the number of intersections and place names, the number of population, the number of restaurants, convenience stores. There are numbers, etc., and the distance to stations, prefectural offices, city halls, etc., latitude / longitude of urban areas, etc. In addition to this, a method of receiving a signal for determining a specific area such as an urban area based on VICS information or the like can be considered. Then, the specific area is determined based on these pieces of information (step 104). As a criterion for determining an urban area, for example, the population density is 150 to 200 people / ha or more, the number of telephone calls is 50 to 100 / ha or more, the number of place names and the number of intersections are 5 or more.
10 or more, 5 to 10 km away from stations, prefectural offices, city halls, etc.
Within, etc. These can be combined in various ways, and the judgment reference value itself can be changed by an external input. As an example of determining an area other than an urban area as a specific area, a case of a green space or a rural area will be described.
Input information for determining a green space or a rural area includes the number of roads, the number of buildings, the population density, and the altitude value. And as a standard for judging green spaces and rural areas, the paved road is 0 to 2 lines / ha, the number of buildings is 1 to 2 units / ha or less, and the population density is 30.
There are people / ha or less and altitude values of 50 m or more and 500 m or less. In the case of residential areas, the population density is 200-300 people /
It is ha. As described above, urban areas, green spaces and rural areas,
When a specific area such as a residential area is determined (step 104)
Yes), the elevation color combination color table (second color table) in which the display color for the specific area is recorded and stored is read from the recording medium 7 (step 105), and the area other than the specific area is read as the specific area. The color table (first color table) corresponding to the altitude of the display color different from the display color of No. is read (No in Step 104, Step 106), and the display color of the determined specific area is displayed on the screen of the display unit 1. And the display color of the area other than the specific area,
Map information is drawn (steps 107 and 108). The color of the urban area as a specific area is blue or red, which does not cause a sense of incongruity, and is colored in relation to the altitude. In addition, when displaying urban areas, the number of telephone numbers per unit area, the number of buildings, the number of intersections and place names, the number and width of roads, the number of people, the number of restaurants, and the number of convenience stores should be adjusted according to the size of the numbers. By changing the saturation of the display color for display, the variety of display is widened and it is possible to enjoy operation and viewing. When the population fluctuates day / night, it is possible to display the city area corresponding to this. The difference between the display color of a specific area such as an urban area and the display color of an area other than the specific area is
For example, the hue is about the opposite color or the hue difference is about 60 to 300 degrees. This hue difference can also be used as a condition when two or more types of specific areas are mixed and displayed.
Further, the color difference in the uniform color space can also be defined, and approximately ΔEuv> 8-12. The above hue and saturation are
Expressed in the three-dimensional space shown in FIG. 4, each calculation formula is FB
It can be obtained from the value-luminance characteristic and the xy chromaticity value of each color. By using this calculation formula, it is easy to obtain the color table of the specific region by calculation, and it is possible to move the conventional color table in the conceptual color direction of the specific region and obtain it by inverse calculation.

The display control action on the display means 1 when the display area on the screen of the specific area is small or when the vehicle is traveling will be described with reference to the flowchart of FIG. The current vehicle position is obtained by inputting the vehicle position detection signal 3 and the traveling state confirmation signal 4 to the main controller 2 (step 20).
1). Map information near the vehicle position and data for determining a specific area are read from the recording medium 7, and determination of the specific area is executed in the same manner as described above (step 202). The color table is read based on the result of this determination, and the display means 1 is displayed.
Drawing map information on the screen (steps 207, 20)
8). However, at this time, if the display area of the specific area on the display screen is small, even if you change the color corresponding to the altitude among the display colors for the specific area, it will be difficult to recognize the altitude. It becomes difficult to understand. Therefore, from the resolution of the display screen or the spatial frequency characteristics of the human eye (visual acuity of 0.7 or more),
When the display area on the screen of the specific area is resolution × 5 or less or 0.238 cpd or less, it is determined that the display area is small (No in step 203), and the color difference in the color table is determined by the jnd scale (MacAdam ellipse). About 3 times) or as the exact same color (step 20).
5) In the specific area, the change amount of the display color corresponding to the altitude is reduced or fixed. Further, while the vehicle is traveling (No in step 204), the same processing as the color restriction of the color table by the display area on the screen is performed so that the driver can easily recognize the display of the specific area in a short time. The display area on the screen of the specific area is large enough (Step 2
03), or when the vehicle is stopped (Yes in step 204), similarly to the above, the elevation color combination color table is read (step 206) and the display color of the specific area and the display color of the area other than the specific area are read. , And the specific area is displayed on the screen of the display means 1 by coloring the altitude among the display colors.

As described above, according to this embodiment,
Since the display color of the determined specific area and the display color of areas other than the specific area are made different, and the specific area is colored for the altitude in the display color, it is a specific area such as an urban area. The three-dimensional topographic display can be achieved at the same time, and in particular, the visibility of a specific area is improved, and a display with a sense of reality that does not cause a sense of incongruity can be obtained. Further, by reducing or fixing the amount of change in the display color of the specific area when the vehicle is traveling, the specific area can be easily recognized in a short time. Further, the same processing can be performed depending on the display area on the screen to improve the visibility. In addition, since the judgment criterion of the specific area can be input and changed from the outside, the terrain can be arbitrarily displayed, and it is possible to realize a vehicular display device corresponding to each individual's preference and having a wide range of adaptation and enjoyable operation.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a vehicle display device according to the present invention.

FIG. 2 is a flowchart for explaining determination of a specific area and display control on a display unit based on the determination result in the above embodiment.

FIG. 3 is a flow chart for explaining display control on the display means when the display area of the specific area is small and the vehicle is traveling in the above-described embodiment.

FIG. 4 is a diagram showing a three-dimensional color space having hue and saturation axes in the above embodiment.

FIG. 5 is a block diagram of a conventional vehicle display device.

FIG. 6 is a diagram showing a conventional three-dimensional topographical display example.

[Explanation of symbols]

1 Display means 2 Main control unit (control means) 7 recording media

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-8-179688 (JP, A) JP-A-6-341849 (JP, A) JP-A-5-203457 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) G09B 29/00-29/14

Claims (9)

(57) [Claims] 1. A vehicle display device that displays at least map information such as roads and topography, and a storage unit that stores at least map information, and a display unit that displays the map information stored in the storage unit. A map information selection unit for selecting map information of a predetermined area from the map information stored in the storage unit, a first color table having a display color corresponding to an altitude, and a second color table different from the first color table. A color table storing means for storing the color table of the first color table, wherein the first color table is set so that the change of the display color corresponding to the change of the altitude is set larger than that of the second color table; The specific area determining means for determining whether or not there is a predetermined specific area in the map information selected by the means, and the specific area determining means When it is determined that the area in the map information is included in the map information, a control means for displaying the altitude of the specific area on the display means in a display color corresponding to the second color table is included. Vehicle display device. 2. The vehicle display device according to claim 1, wherein the second color table has a plurality of color tables, and when the specific area determination unit determines a specific area, the specific area is determined. A display color corresponding to one of the second plurality of color tables according to the type or degree of
A display device for a vehicle, which displays an altitude of the specific area. 3. When the specific area is an urban area, the determination of the urban area is made by determining the number of telephone numbers, the number of buildings, the number of place names, the width and number of roads, and the number of population per unit area from the recorded map information. The number of restaurants, the number of convenience stores, a station, a distance from a prefectural office or a city hall, or at least one of latitude and longitude of the city, the vehicle according to claim 1 or 2. Display device. 4. The display color of the specific area and the display color of the area other than the specific area have opposite hues or a hue difference of 60.
The display device for a vehicle according to any one of claims 1, 2 and 3, wherein the display device is in the range of about 3 degrees to about 300 degrees. 5. The vehicle according to claim 1, wherein the display color of the specific area is changed according to the display area on the screen of the specific area. Display device. 6. The display color of the terrain of the specific area only when the display area on the screen of the specific area is at least resolution × 5 or 0.238 cpd × 5 from the resolution or the spatial frequency characteristics of the human eye. 6. The vehicle display device according to claim 5, wherein the display is changed according to the altitude. 7. When the vehicle is determined to be traveling based on the traveling state recognition signal, the entire area of the map information selected by the map information selecting means is stored in the first color table and the second color table. The vehicle display device according to claim 1, wherein the display device displays the display color only in one of the display colors. 8. When the city area is displayed, the number of telephone numbers per unit area, the number of buildings, the number of places, the width and number of roads, the number of people, the number of restaurants, and the number of convenience stores are adjusted according to the size of the numbers. The vehicle display device according to claim 3, wherein the display color is changed and the display is changed. 9. The vehicle according to claim 1, further comprising vehicle position detecting means for detecting a vehicle position, wherein the map information selecting means selects map information of a predetermined area including the vehicle position. The vehicle display device described.