JP2774880B2 - In-vehicle image display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle image display apparatus for switching and displaying navigation for performing course guidance and time and other information.

[0002]

2. Description of the Related Art In recent years, it is common for air conditioners, car stereos, and the like to be installed in mass passenger cars, and it is not uncommon for passenger cars to be equipped with a car telephone and a navigation device for performing course guidance in addition to high-end vehicles. .

A navigation device guides a course from a departure point or a current position to a destination. For example, a display is mounted near a driver's seat and a current position, a traveling route from the current position to the destination, a destination are displayed on a display screen. It displays the direction of travel to the destination, landmark information at intersections and the like, and outputs the course guidance information by voice using this display in combination with voice generating means.

[0004] Some simple devices display a map including a course from the departure place or the present location to the destination and the surrounding area, but it is difficult to understand the map alone, so that the departure place, the present location and the destination are displayed. Or draw a model course on a map, and furthermore, specify the departure point, current position and destination, and confirm the current position by inputting the mileage, steering angle, position confirmation input of a specific point while traveling, etc. In some cases, by performing tracking, output of instruction information and confirmation information of a traveling direction at an intersection, and output of feature information for course confirmation in the middle of a course. The present applicant has already made various proposals (for example, JP-A-2-51015, JP-A-2-56591, JP-A-2-187898) regarding the latter type of navigation device.

[0005]

However, the navigation device is useful for a driver who is unfamiliar with the road conditions from the departure point or the current position to the destination. It is not always necessary to present it to the person. That is, as described above, even if the output of the instruction information and the confirmation information of the traveling direction at the intersection and the output of the characteristic information for the course confirmation in the course of the course are performed, it is particularly a key at the intersection and the like. It is only necessary to be able to present the necessary information to the driver at the point, and rather, the proportion of the information that needs to be presented is small in all traveling sections. For example, from a departure point to a destination, consider a course of about 2 hours as a running time or a course of about 100 km as a running distance, and consider how long it is necessary to present information on the distance during that period. It will be clear.

[0006] Therefore, an effective use other than navigation of a display used in a navigation device is considered. As one of them, there is a display on a clock screen, and a display of an analog clock on a picture tube has already been proposed in, for example, Japanese Patent Application Laid-Open No. Sho 62-66779.
However, this is applied to a general picture tube,
Assuming various driving situations, it is not directly applicable to a display of a navigation device mounted on a vehicle.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide an on-vehicle image display device that effectively utilizes a display of a navigation device mounted on a vehicle. Another object of the present invention is to display a time based on a traveling position of a vehicle.

[0008]

SUMMARY OF THE INVENTION The present invention provides an image display apparatus for displaying and outputting navigation information on a display mounted near a driver's seat of a vehicle, from a current position including map information for navigation to a destination. A database storing course guidance information and service display information during the travel, travel detection means for detecting travel information, distance detection means for detecting that the next feature or intersection is a predetermined distance or more, and referring to the database. While displaying the course guidance information based on the traveling information, and when the distance detecting means detects that the distance is equal to or more than a predetermined distance, until the course guidance information of the next feature or intersection is output. Characterized by comprising control means for controlling display information on the screen so as to output service display information, The features and intersections are the features and intersections to be guided next, and the service display information is a clock whose time difference is corrected based on the longitude of the current position obtained from the travel information and the atmospheric pressure during travel. It is a weather forecast predicted based on a change.

[0009]

In the vehicle image display apparatus of the present invention, the control means controls the display information of the screen displayed on the display, and displays the course guidance information based on the traveling information while referring to the database. Since the time obtained by the timing means is displayed in a time zone other than the time when the course guidance information is output, the clock provided normally can be eliminated from the driver's seat. In addition, it is possible to display an accurate time obtained by correcting the time difference from the traveling position.

That is, the database stores the course guidance information from the current position including the map information for navigation to the destination, and outputs a clock when the course guidance information is not displayed and a time difference from the running position. Information and the like are stored. Then, a clock is displayed in a time zone other than when the course guidance information is output, and the display content can be changed according to traveling information such as speed and surrounding environment information such as brightness.

[0011]

Embodiments will be described below with reference to the drawings.
FIG. 1 is a diagram showing an embodiment of an in-vehicle image display device according to the present invention, and FIG. 2 is a diagram for explaining a flow of processing by a CPU. In FIG. 1, 1 is a CPU, 2 is a ROM, 3
Is a RAM, 4 is a display, 5 is a display controller, 6 is an input device, 7 is a database, 8 is a clock IC, 9 is a vehicle speed sensor, 10 is a direction sensor, and 11 is GP.
S and 12 are barometers, and 13 is an illuminance sensor.

The ROM 2 is a memory for storing a navigation program such as a course search and a course guide and other control programs, and the RAM 3 is a memory used as a work area for storing data being processed and temporary data. As the display 4, a CRT display, a liquid crystal display, or the like is used, and a display controller 5 controls the display. The input device 6 is, for example, a touch panel or the like attached to the screen of the display 4, and by touching an option area such as a character or an icon in the displayed screen, inputs an information selection command or a screen switching command, This is for inputting characters and the like.

The database 7 stores course guidance information from the current position to the destination including map information for navigation (course guidance), and outputs a clock, a weather forecast, and a selection when the course guidance information is not output. Service display information such as information is stored.
The map information includes, for example, road information, intersection information, departure point (current position), position information as a destination, and feature information. In the course setting of the navigation program, when the destination is input, the traveling direction to the destination is set for each intersection sequentially from the intersection close to the destination, and from the nearest intersection by inputting the departure point (current position). The intersection is searched sequentially according to the set traveling direction, and the course guidance information to the destination along the route is obtained. In the service display information, the clock is information that determines the display mode of, for example, the design, color, brightness, and size of various watches, and the weather forecast is, for example, whether the weather is uphill or downhill from changes in atmospheric pressure. This is the information that determines the forecast content. The selection information is information for selecting a clock, a weather forecast, and other outputs, such as vehicle speed, illuminance, air pressure, time, and position. The clock IC 8 stores a standard time and information for obtaining the time from the time difference between the longitudes.

The vehicle speed sensor 9 detects the traveling speed of the vehicle, and the direction sensor 10 detects the traveling direction. GPS (Grogal Positioning System)
Numeral 11 is for detecting a traveling position by receiving a radio wave from an artificial satellite. The vehicle speed sensor 9 and the azimuth sensor 10 are for obtaining travel information of the travel azimuth and the speed. However, by integrating the speed along the travel azimuth, change information of the travel position can also be obtained. The barometer 12 measures the air pressure near the traveling point, and the illuminometer 13 measures the illuminance near the traveling point.

The CPU 1 executes a control program stored in the ROM 2, inputs detection / measurement information of the input device 6, the clock IC 8, the vehicle speed sensor 9, etc., stores course guidance output information in the database 7, 7 is a control unit that performs display control based on various information stored in the storage unit 7. The outline is described below.

First, when the navigation display is not performed, an analog clock is displayed. FIG. 2 shows the flow of the processing. In the clock display process, initialization is performed as shown in FIG. 2A, and time data is written into the clock IC by inputting the current time, and the scale is displayed. Thereafter, the positions of the hands of the second hand, the long hand, and the short hand are calculated, and if there is no change in the display color or design, the process of displaying each hand on the scale is repeated at predetermined time intervals. Display color and brightness,
If there is a change in the design, the scale display is changed and each indicator is displayed.

Further, the change of the display color, the design, and the calculation of the time are performed by, for example, an interruption process every second as shown in FIG. 2B. In this process, the illuminance, the vehicle speed, and the GPS are read, the time difference from the standard time is calculated based on the traveling position obtained by the GPS, and the display color, luminance, and design are set based on the illuminance and the vehicle speed. For example, when the brightness is high, the brightness is increased, and as the driving speed increases, the color and the design are easier to see instantaneously, and the display color and design are changed by omitting the second hand. Displays a clock with a color, brightness, and design that are easy to see accordingly. Further, the color may be changed every moment so that the time can be easily recognized by the color change.

Furthermore, when moving in a certain area, whether the air pressure is moving in a direction of decreasing the pressure or moving in a direction of increasing the atmospheric pressure, the weather is downhill or uphill based on the change. The change in weather at the destination can be predicted with a certain degree of accuracy. Then, the barometric pressure is measured near the traveling point by a barometer, and whether the weather is a downhill or an uphill is predicted from a change in the air pressure due to traveling of a predetermined distance, and a weather forecast is displayed.

When the navigation display is performed, for example, the following processing flow is performed. The navigation program can be roughly divided into course setting and course guidance as described above. In the course setting, a destination and a departure point (current position) are input. When the destination is input, the shortest traveling direction to the destination is set for each intersection sequentially from an intersection close to the destination. Therefore, with this setting, each intersection has the shortest traveling direction to the destination as course guidance information, and the intersections are sequentially set in accordance with the traveling direction set from the nearest intersection by inputting the departure place (current position). As the search proceeds, it is possible to obtain course guidance output information along the route to the destination.

In the course guidance, the current position is tracked by integrating the vehicle speed along the running direction of the vehicle to match the course set as described above,
As you approach the intersection by tracking it, check the intersection,
The guidance information necessary for determining the traveling direction is output. In addition, information about features such as guards and railroad crossings other than intersections, public buildings, gas stations, and the like is also output in a manner similar to the information necessary for confirmation using photographs, schematic diagrams, and the like.

In the course guidance, by detecting that there is a predetermined distance or more to the next feature or intersection output as the guide information, after passing through the intersection, the road to the next feature or intersection is taken for a while. If it is determined that the traveling will continue, the navigation program only tracks the current position, and the output of the course guidance information is interrupted. During this time, the display of the clock based on the processing in FIG. 2 is performed. Here, since the distance can be converted into time based on the vehicle speed, if the vehicle speed is used as a parameter, it goes without saying that the meaning of the predetermined distance includes the predetermined time.

It should be noted that the present invention is not limited to the above embodiment, and various modifications are possible. For example, in the above-described embodiment, the clock and the weather forecast are displayed in the interval between navigations. However, flowers, figurines, landscapes, still life images such as paintings, pictures of family members, and the like may be displayed in combination. Alternatively, a switching option may be displayed at a corner of the screen so that the selection can be freely switched. In addition, the service display information is continuously displayed while the course guidance information by the navigation is not displayed. In such running conditions, control such as interrupting the display may be performed. Further, as the service display information, a message may be selected and displayed according to the traveling information or the surrounding environment information. In the display of the clock, the time of each region in the world may be displayed by selection.

As described above, the course matching is performed based on the traveling information including the azimuth and the vehicle speed while referring to the database, and the course guidance information is displayed on the display. The screen display information is controlled so that the clock and other service display information are displayed as information other than the course guidance information according to the surrounding environment, and the display used as a navigation device can be used effectively. You can eliminate the clock you were equipped with. In addition, an easy-to-read display according to running conditions and surrounding environment conditions can be performed, and in the case of long-distance running, the time difference can be automatically corrected.

[Brief description of the drawings]

FIG. 1 is a diagram showing one embodiment of an in-vehicle image display device according to the present invention.

FIG. 2 is a diagram for explaining a flow of processing by a CPU.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... CPU, 2 ... ROM, 3 ... RAM, 4 ... Display, 5 ... Display controller, 6 ... Input device, 7
... Database, 8 ... Watch IC, 9 ... Vehicle speed sensor, 1
0: Direction sensor, 11: GPS, 12: Barometer, 13:
Illuminance sensor

Continuation of the front page (56) References JP-A-60-79497 (JP, A) JP-A-4-371991 (JP, A) JP-A-3-154530 (JP, A) JP-A-4-33985 (JP, A) JP-A-61-212719 (JP, A) JP-A-58-174712 (JP, U) JP-A-2-52116 (JP, U) JP-A-4-6081 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) G01C 21/00 G08G 1/0969 G09B 29/00

Claims (4)

(57) [Claims] 1. An image display device for displaying and outputting navigation information on a display attached near a driver's seat of a vehicle, comprising: course guidance information and service display information from a current position including a map information for navigation to a destination. , A travel detection means that detects travel information, detects that the next feature or intersection is more than a predetermined distance
Distance detecting means for, and which displays the course guidance information based on the travel information with reference to said database, said distance
The detection means has detected that the distance is equal to or greater than the predetermined distance.
In this case, the course information for the next feature or intersection
An on-vehicle image display device comprising: a control unit for controlling display information on a screen so as to output service display information until the user inputs the information. 2. The next feature or intersection is guided next.
2. A feature or an intersection to be obtained.
On-board image display device. 3. The service display information includes the travel information.
Time difference is corrected based on the longitude of the current position obtained from
2. The vehicle-mounted picture according to claim 1, wherein the timepiece is a watch.
Image display device. 4. The service display information includes the travel information.
Predicted from changes in air pressure during driving obtained from
2. The image for in-vehicle use according to claim 1, wherein the image is an air forecast.
Image display device.