JPH06188767A - Traffic information display device - Google Patents

Abstract

PURPOSE:To obtain a traffic information display device which automatically selects and displays only traffic information useful for a driver. CONSTITUTION:An information control part 5 of this traffic information display device is equipped with a CPU 5a and a RAM 5b which temporarily stores the area code of an area found from navigation information sent from a navigation device 3 and also temporarily stores traffic information sent from a receiver 2 receiving a broadcast sent while the traffic information is multiplexed. The CPU 5a compares the area code read out of the RAM 5b with the area code included in the traffic information and decides matching when at least some of plural area codes are matched, and when the CPU 5 decides the matching, the traffic information including the matching area code is displayed on a display unit 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traffic information display device for receiving a broadcast in which traffic information is multiplexed with an audio FM broadcast and transmitting it, extracting traffic information from the received signal and displaying it on a display.

[0002]

2. Description of the Related Art In recent years, in a receiver for receiving a broadcast that multiplexes and transmits traffic information in an audio FM broadcast or the like, a device has been developed for extracting the traffic information separately and displaying it on a display. This kind of traffic information is composed of digital data, and is composed of a header, a region code indicating the area of the traffic information, a character code indicating the characters of the traffic information, and the like.

[0003]

For example, when a driver of an automobile wants to display and view traffic information on a display while receiving this type of multiplex broadcast, what is the traffic information to be multiplexed and broadcast? When there is a case, if all of these traffic information is displayed, the driver needs to select the necessary traffic information, for example, the traffic information of the road or area to pass through from the display screen, and visually check it. There was a risk of missing the necessary traffic information. Also, the received traffic information is
Usually, there is a problem that a large amount of memory is required because it is stored in the memory.

The present invention has been made in view of the above points, and an object thereof is to provide a traffic information display device capable of automatically selecting and displaying only useful traffic information for a driver. .

[0005]

In order to achieve the above object, the traffic information display device of the present invention has an area determined based on navigation information sent from the navigation device, as shown in the block diagram of FIG. First storage means for temporarily storing the area code of the area, second storage means for temporarily storing traffic information sent from a receiver that receives a broadcast that multiplexes and transmits traffic information, and read from the first storage means Comparing the area code and the area code included in the traffic information read from the second storage means, and if at least a part of the plurality of area codes match, the comparing and judging means and the comparing and judging means Display control means for displaying the traffic information including the matched area code on the display device when the determination result of the match is given.

[0006]

In the traffic information display device having such a configuration, the area code of the area area obtained based on the navigation information sent from the navigation device is temporarily stored in the first storage means. Further, the traffic information sent from the receiver that receives the broadcast that multiplexes and transmits the traffic information is temporarily stored in the second storage means.

The comparison / determination means compares the area code read from the first storage means with the area code contained in the traffic information read from the second storage means, and at least a part of the plurality of area codes matches. At this time, it is determined that they match.

Then, when the comparison / judgment means makes a judgment of coincidence, the display control means causes the display device to display the traffic information including the coincident area code.

As described above, since only the traffic information including the area code that matches the area code of the area area obtained based on the navigation information is displayed on the display unit by the display control means, for example, the current state of the automobile is displayed on the display unit. While displaying the position or displaying the route guidance, only the traffic information near the current position or the traffic information included in the guidance route is automatically selected and displayed, and the driver displays the information on the display. It is possible to obtain necessary traffic information without paying much attention to it, which can be useful for travel planning.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a traffic information display device used in an automobile equipped with a navigation device 3. 2 is, for example, a voice F that multiplexes and broadcasts traffic information.
This is a receiver for receiving M broadcast, and the FM multiplexed signal received by the antenna 11 is selectively received by the tuner section and detected by the FM detector. The receiver 2 includes a bandpass filter that separates and extracts the multiplexed traffic information from the detected received signal, a circuit that corrects errors in the extracted data, a memory that temporarily stores the corrected traffic information data, and the like. I have it.

As shown in FIG. 2, the traffic information data to be multiplex-broadcasted, for example, follows a header indicating information classification,
It consists of area codes in each direction of east and west, north and south, a kanji code indicating specific characters of traffic information, and a kana code. At the driver's request, such traffic information data is sent to the information control unit 5 described later. It Here, the area code means that the area that is divided by the longitude line and the latitude line on the map is further divided by a plurality of vertical and horizontal dividing lines, and for example, the size of a map of one in 25 thousand issued by the Geographical Survey Institute. Is a code indicating each area corresponding to the area code and is the same as the area code determined based on the navigation information described later.

The navigation device 3 includes an azimuth detecting unit for detecting the traveling direction of the automobile, a traveling distance detecting unit for detecting the traveling distance, and a map information storage unit for storing map information of each place. While the vehicle is traveling, the current traveling position is calculated, and the current position of the automobile is displayed on the display 7 by superimposing the current position of the vehicle on the map information read from the map information storage unit.

Further, the navigation device 3 has a route guidance function, determines the optimum route between the destination input by the driver and the current traveling position, and displays the route superimposed on the map information. Further, the navigation device 3 also has a function of displaying a map of an arbitrary area input by the driver on the display device 7. The current traveling position data, route guidance data, and arbitrary map data calculated by the navigation device 3 are sent to the information control unit 5 described later.

The information control unit 5 is mainly composed of a microcomputer, and is a CPU for executing various arithmetic processes.
5a, RO for storing fixed data such as control program
M, a RAM 5b that can be read and written at any time, and various input / output circuits. The RAM 5b has a traffic information storage area for storing traffic information including the area code sent from the receiver 2, and a navigation including current traveling position data, route guidance data, and arbitrary map data sent from the navigation device 3. A navigation information area code storage area for storing area data calculated based on information is provided. This RAM constitutes the first storage means and the second storage means.

Based on the control program stored in the ROM, the CPU 5a of the information control unit 5 uses the current traveling position data, route guidance data, and arbitrary map data input in advance from the navigation device 3 to determine the area code corresponding to the position. And the traffic information area data sent from the receiver side and the navigation information area code from the navigation device are compared, and the traffic information including the matched area code is displayed. This CPU constitutes the comparison determination means and the display control means.

Reference numeral 4 denotes a key operation section operated by a driver or the like. When the driver wants to obtain traffic information multiplexed in FM broadcasting, the driver operates a key of the key operation section 4 to input a display request. The display device 7 is composed of a liquid crystal display, a CRT and the like, and is controlled by the display controller 6 to display a map, current position, guide route, traffic information and the like.

The display controller 6 has a character memory, an image memory and the like, and based on the current traveling position data, route guidance data and arbitrary map data sent from the navigation device 3, a map corresponding to them, a current position, The guide route and the like are displayed on the display 7, and the traffic information selected by the multiple broadcast is displayed on the display 7.

Next, the operation of the traffic information display device will be described with reference to the flowchart of FIG.

First, the receiver 2 receives an audio FM broadcast that multiplexes and broadcasts traffic information through the antenna 11, and
The tuner section selectively receives the multiplexed signal. Then, the signal is detected by the FM detector, the received signal thus detected is passed through a band pass filter, the multiplexed traffic information data is separated and taken out, error correction is performed, and the traffic information is sent to the information controller 5. send. The information control unit 5 temporarily stores the traffic information sent from the receiver 2 in the traffic information storage area of the RAM 5b.

In the navigation device 3, the azimuth detecting unit detects the traveling direction of the automobile, the traveling distance detecting unit detects the traveling distance, the current traveling position of the automobile is calculated, and the map information read out from the map information storage unit. The current position of the automobile is displayed on the display 7 in a superimposed manner. Further, when the display is switched to the route guidance display by the driver's operation, the optimum route between the destination input by the driver and the current traveling position is determined, and the guide route is superimposed and displayed on the map. In addition, when the map is switched to an arbitrary point by the driver's operation,
Display 7 for a map of the area selected and displayed by the driver
To display.

When a driver or the like inputs a traffic information display request from the key operation unit 4 in such a state, the CPU 5a of the information control unit 5 proceeds from step 101 to step 102 to display route guidance. Or not. Here, if the route guidance is being displayed, the process proceeds to step 110, and the area code of the area in which the guidance route exists is obtained based on the route guidance data sent from the navigation device 3. For example, when the guide route is an arrow route as shown in FIG. 4, the area codes of the area areas A1 to A7 divided into unit area areas of a predetermined size are obtained. These area code data are temporarily stored in the navigation information area code storage area of the RAM 5b.

On the other hand, if it is determined in step 102 that the route guidance is not displayed, the process proceeds to step 103, and it is determined whether or not the map is displayed at an arbitrary point. Here, when the map display of an arbitrary point is performed, the process proceeds to step 111, and the center coordinates (X, Y) of the displayed screen is calculated. Next, at step 112, a four-divided area (each area obtained by vertically and horizontally dividing a regional area) C1 in which the central coordinates exist as shown in FIG. 5 is obtained.

Next, in step 105, step 1
Eight four-division areas B1 to B8 adjacent to the periphery of the four-division area C1 obtained in 12 are obtained (FIG. 5). Further, in step 106, a regional area A10 (having four unit regional areas) in which these four-divided areas B1 to B8 exist is determined, and their regional codes are determined. The area code data is temporarily stored in the navigation information area code storage area of the RAM 5b.

On the other hand, in step 103, if the current position of the car is displayed without displaying the map of the arbitrary point,
The process proceeds from step 103 to step 104, and the four-divided area D1 to which the automobile advances next is obtained. That is, as shown in FIG. 6, when the current position of the automobile is located within the 4-division area E8 and the traveling direction is on the right side of the drawing, the 4-division area D1 adjacent to the right is obtained.

Then, the process proceeds to step 105, and eight 4-division areas E1 to E8 adjacent to the 4-division area D1 obtained in step 104 are obtained (FIG. 6). further,
In step 106, the area area A20 (having four unit area areas) in which the four-divided areas E1 to E8 exist is obtained, and the area codes thereof are obtained. The area code data is temporarily stored in the navigation information area code storage area of the RAM 5b.

After step 110 or step 106, the CPU 5a proceeds to step 107,
Use the area code in the traffic information sent from receiver 2 as RA
The area code (A1 to A) obtained from the traffic information storage area of M5b and obtained based on the navigation information is read.
7, A10, or A20) is read from the navigation information area code storage area, and it is determined whether the area code of the traffic information and the area code of the navigation information match.

If there is a match between the area codes of both parties (including matching of some unit area codes), the CPU 5
In step 108, the a outputs the traffic information data from the receiver 2 including the matched area code to the display controller 6, and the traffic information is displayed on the display device 7 as characters, for example, as shown in FIG. indicate. Such traffic information can be displayed instead of the displayed map screen, or can be displayed so as to overlap a part of the displayed map screen.

In this way, for example, when the current position of the automobile is displayed on the display 7, only the traffic information of the area area including the current position and considering the traveling direction is selected, and the display 7 automatically displays. Is displayed. Also, the display 7
When the route guidance is displayed in, it is possible to select and display only the traffic information included in the route guidance, that is, the traffic information of the road that will be passed.

Furthermore, when displaying a map of an arbitrary point,
Only the traffic information of the area area including the center coordinates of the display screen is selected and displayed, so when the driver arbitrarily displays the map of the desired area by the place name index or scroll on the map display screen, Only traffic information can be automatically displayed to assist in travel planning.

FIG. 9 is a block diagram showing an example of a traffic information display device that does not use navigation information. As shown in FIG. 9, the structure of this device is the same as that of the above-described embodiment except that there is no navigation device, and each block is given the same reference numeral as above and its description is omitted.

In this device, the information control section 5 displays a place name index or the like on the display 7 instead of the navigation information.
Have the driver interactively select the desired point (region where you want to know traffic information) and road type. Program data, display data, etc. for that purpose are stored in the ROM. R
The AM 5b is provided with a traffic information storage area for storing traffic information data sent from the receiver 2 and a selected area storage area for storing the area code and road type of the selected area area.

Next, the operation of this apparatus will be described with reference to the flow chart shown in FIG. Similarly to the above, the traffic information received by the receiver 2 and sent to the information control unit 5 is RA
It is temporarily stored in the traffic information storage area of M5b.

When a driver inputs a traffic information display request from the key operation unit 4, the CPU 5a of the information control unit 5
Advances from step 201 to step 202, displays the place name index on the display 7, and causes the driver to interactively select the place name of the traffic information desired by the driver from the place name index.

Then, the CPU 5a obtains the area code of the specific area of the place name, for example, the area area where the city hall of the city or the town hall exists, from the data table of the area area and the code stored in advance, and stores it in the RAM 5b. Remember the area code.

Next, in step 203, the type of road (highway, national road, prefectural road, etc.) is displayed on the display unit 7, and the driver wants to see the road type interactively with the driver. The road type of the traffic information is selected, and the road type (for example, highway, national road and highway, prefectural road and national road, all roads, etc.) is determined.

Next, at step 204, the area code in the traffic information sent from the receiver 2 is read from the traffic information storage area of the RAM 5b, and the area code of the selected area area is read from the selected area storage area. It is read, and it is determined whether the area code of the traffic information matches the selected area code.

If there is a match with the area code, the process proceeds to step 205, the road type of the traffic information is extracted from the stored character data of the traffic information, and the above step 20 is performed.
It is determined whether or not there is a match between the road type selected in 3 and the road type of the traffic information. If the road types match, then the process proceeds to step 206, where the traffic information having the same region code and road type is sent to the display controller 6, and the display 7 displays the traffic information as shown in FIG. To do.

As described above, since only the traffic information of the selected road type in the area selected by the driver is displayed on the display device, the traffic information received by the receiver 2 in the multiplex broadcast is received by the driver. Only useful information is displayed, and you can easily get the necessary traffic information.

[Brief description of drawings]

FIG. 1 is a block diagram of a traffic information display device showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a configuration of traffic information data received by a receiver.

FIG. 3 is a flowchart showing an operation of the traffic information display device.

FIG. 4 is an explanatory diagram showing regional areas in a route guidance display.

FIG. 5 is an explanatory diagram showing a regional area and the like in a map display of an arbitrary point.

FIG. 6 is an explanatory diagram showing a regional area and the like in the current position display.

FIG. 7 is an explanatory diagram showing displayed traffic information.

FIG. 8 is a configuration diagram of the present invention.

FIG. 9 is a block diagram of another embodiment.

FIG. 10 is a flowchart showing the operation of the apparatus of another embodiment.

[Explanation of symbols]

2-Receiver, 3-Navigation device, 5-Information controller, 5a-CPU, 5b-RAM, 7-Display.

Claims (2)

[Claims] 1. A first storage means for temporarily storing a region code of a region area obtained based on navigation information sent from a navigation device, and a receiver for receiving a broadcast for multiplexing and transmitting traffic information. The second storage means for temporarily storing the traffic information, the area code read from the first storage means and the area code included in the traffic information read from the second storage means are compared, When there is a match at least in part, a comparison and determination means for determining a match, and a display control means for displaying traffic information including the matched area code on a display when the comparison and determination means determines a match, A traffic information display device comprising: 2. A region information determining means for determining a local area and road type of traffic information desired by a user by user's selection, and a receiver for receiving a broadcast for multiplexing and transmitting traffic information. The storage means for temporarily storing the traffic information is compared with the area code and road type of the area area selected / determined by the area determining means and the area code and road type included in the traffic information read from the storage means. When each area code and road type have a match, a comparison and determination means for determining a match, and when the comparison and determination means gives a match, traffic information including the matched area code and road type is displayed. A traffic information display device, comprising: