JPS61156277A - Running track display unit for vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a driving trajectory display device for a vehicle, and particularly to a display device that superimposes and displays a current driving map and a driving trajectory on a display section of the driver's seat. It is something.

[Prior Art] In-vehicle navigators are well known for informing the driver of the current driving position of the vehicle, and have the advantage of freeing the driver from the troublesome task of checking the driving position by opening an atlas. This is extremely useful, especially when driving on unfamiliar routes.

Conventional general navigators display a desired map on a display screen installed in front of the driver's seat, such as a CRT, or attach a map sheet, detect the current position of the vehicle using a direction and distance sensor, and display the map sequentially on the screen. It consists of a configuration that displays the trajectory.

Therefore, in such conventional devices, since the scale of the map displayed on the screen is -. There was a problem that directions could not be given on the map.

Therefore, in order to solve such problems, vehicle travel trajectory display devices capable of displaying maps of different scales have been proposed in the past, such as Japanese Patent Laid-Open No. 57-2018.
According to 08, map data of different scales are stored in the memory, and the scale can be arbitrarily switched by the driver's switch operation.

In addition, other conventional devices-c1 Utility Model Opening Showa 58-11/l
715, a magnification adjustment device is provided in the optical system of the display section, thereby making it possible to obtain projection images of different scales from one original image.

[Problems to be Solved by the Invention] However, each of the above-mentioned conventional devices has a problem in that scale changes are difficult.

In other words, in the former conventional technology in which the scale is changed by the driver's swipe operation, a specified scale is selected using a keyboard, etc., but when changing multiple types of scales, the keyboard key arrangement becomes multi-layered. It may be difficult to install such a large keyboard on the instrument panel of the driver's seat, which has limited storage space, and the scale specification operation may be complicated, which may reduce concentration on driving. was there. In addition, with conventional devices, the scale is changed while the map is displayed on the display screen, which increases the holding time when changing the scale, which is inconvenient when you want to quickly check direction information while driving. There is a problem that this occurs.

In addition, with conventional devices using the latter optical system, when the screen is enlarged, details may become unclear because the same original image is used, and the desired effect may not be achieved in actual use. The problem was that I couldn't do it.

-31 The present invention performs scale switching quickly by simple operation,
An object of the present invention is to provide an improved vehicle traveling trajectory display device capable of arbitrarily obtaining desired direction indicating information from a map covering a wide range to a detailed enlarged view even while driving.

[Means for Solving the Problems] In order to achieve the above object, the present invention has at least a scale mode selection key and a scale instruction selection key on an operation unit such as a keyboard, and displays the scale separately from the normal map display. A display circuit is provided for instructing a scale mode and displaying the scale mode on the screen, and a scale selection circuit is further provided for reading map data of the selected scale,
This has the advantage that the scale mode can be displayed on the screen simultaneously with the normal map display or separately, and the scale can be quickly changed.

[Function] According to the present invention, in normal driving conditions, the table-4 = display unit superimposes the map on which the vehicle is currently traveling and the travel trajectory, and if scale is required, the scale of the operation unit is displayed. A scale mode is displayed on the screen using the mode selection key, a desired scale is selected from this scale mode using the scale instruction selection key provided on the operation section, and the selected scale is quickly selected upon completion of the operation. Even after the map is replaced, the previous travel trajectory can be accurately displayed at a position corresponding to the scale.

[Example] Preferred embodiments of the present invention will be described below based on the drawings.

FIG. 1 schematically shows a circuit of a preferred embodiment of the invention.

In Figure 1, C is placed in an area easily visible to the driver, such as in front of the driver's seat, such as the interior or instrument panel.
A display section 10 such as R-r is provided, and this display section 1
0, the desired map and the vehicle's travel trajectory are superimposed and displayed.

The characteristic feature of the present invention is that the display section 1 is
In addition to the map and travel trajectory on the 0 screen, a scale mode is displayed as necessary, and a mixer is used to supply each of these individual displays to the display unit 10. 12 are provided.

A map ROM 14 is provided to store desired map data including the current location of the vehicle, and in the present invention,
This map ROM1=1 stores a plurality of types of map data of different scales for the same area, and map data of a desired scale can be read out at will.This reading operation is performed by the map data selection circuit 16. J: The selected map data is supplied to the mixer 12 by the map display circuit 18.

The map display is displayed as a still image on the screen -[,
A trajectory display circuit 20 is provided to superimpose and display the vehicle's travel trajectory on this map, and uses the travel detection signal from the travel detection section 22, the driving direction and distance information. Based on this, the desired travel trajectory will be sequentially displayed on the map-IZ.

The characteristic feature of the present invention is that the scale of the map can be changed arbitrarily and that a scale mode is displayed on the screen when the scale is changed.For this purpose, the scale mode display circuit 24
A scale selection circuit 26 is also provided to read map data corresponding to the selected scale from the map ROM 14.

In order to set the scale, an operation section 28 including a keyboard etc. is provided near the display section 14 or at a location that is easy for the driver to operate, and from this operation section normal map display and scale mode switching signals are sent. The selected scale is supplied and the scale mode is entered.

The map data stored in the map ROM 14 is
Figure 5 shows an example of a map of a certain area, and this map is drawn at the maximum scale, so that it covers a wide area, but it is difficult to identify detailed passage conditions. It is almost impossible to do so.

Therefore, the map ROM10 in the present invention is this = 7
- Multiple types of map data with different scales are stored for the same area, and as shown in Figure 3, the map is A-
The map data is divided into nine areas of 1.1 and 3.5 cm, and is stored in the map ROM 14 as map data of three different scales shown in FIG. 4, as shown in FIG.

That is, in FIG. 4, the maximum scale screen shown in FIG. 2 is indicated by (a>), and all nine areas Δ to ■ are displayed on one screen.

Screens with a smaller scale than this are shown in (b) to (e), each of which shows a combination of four out of nine areas in the entire area.

Further, smaller scale art quotients are shown in (f) to (n), each showing one of the nine minimum areas. As shown in Fig. 5, the addresses assigned to the areas in Fig. 2 are as shown in Fig. 4 above.
Map data from a) to (n) are sequentially stored.

Therefore, by specifying the start address of each of these stored contents, it is possible to arbitrarily read map data of a necessary scale.

FIG. 6 shows an example of the keyboard 30 installed in the operation section 28 for switching between the map and scale modes, setting the initial position, or changing the scale in the map mode. The keyboard has number keys 30a, reset key 30b, input key 3Qc, and scale mode selection key 30.
d, a scale instruction selection key 30e, and a map mode selection key 30f, and desired data can be input by operating each key.

In the embodiment, the map and the scale mode are displayed on separate screens, and when the scale mode is selected, the scale is displayed on the screen of the display unit 10 instead of the map display shown in FIG. The scale mode screen is illustrated in FIG. 7, and the scale rate is 1/8000, 1/4000 and T 1/4000, respectively, according to the three types of scales.
It consists of a 1000 scale scale 10a and a cursor 10'b which can be moved between the scales according to the selected scale. The scale scale 108 is a still image, and in the embodiment, it is read from display data provided in the map data selection circuit 16, and since the cursor 10b is a moving display, the scale scale 108 is a still image. The display signal is read out from the Rakutaji King generator. FIG. 8 shows details of the map data selection circuit 16, in which the address of the map ROM 14 is designated by the brisette counter 32 (B
)"I-, the map data at the predetermined address shown in FIG. 2 can be read out.

In order to determine the preset value of the preset counter 32, a multi-block 34 and an adder circuit 36 are provided, and the multi-block 1) 34 receives a map selector 38, a map selector V), scale designation signals A2 to A5, and The display signals corresponding to the scale display 10a from the scale data meter 40 are switched, and the corresponding signals are selected by the signals Δ1, M4, and M2 supplied at the time of starting the apparatus.

The map selector 38 allows the driver to set any map included in the existing vehicle position by inputting from the keyboard 30 or the like, or allows the driver to set predetermined map data as is at the time of starting the device. It may also be supplied to the multi-branch library '3Ill.

Any of the display data selected by the multiplexer 34 in this way is supplied to the BRIEF 1 to the counter 32 via the adding circuit 36, but in the case of the scale change shown in FIG. : It is necessary to select the enlarged map (), and for this purpose, the current location data C is supplied to the adding circuit 36, and the scale signals A2 to
Specified for A5/: Il? The current location data and the current location data of i scale are added together to give the preref 1 to the counter 32 a Brisera h value for selecting desired map data in the map ROM 14.

FIG. 9 shows an example of a map display circuit for displaying map data read from the map ROM II on the display unit 10, map data E is written to the video RAM 14 via the I10 port 42, When writing for one screen is completed, the end detection circuit 46 inverts the U110 port 42 and the video R and AM 441 to the read state, and sends out the stored contents of the video RAM 44 to the mixer 12.

Scanning of video RAM 44 is specified by address counter 48.

FIG. 10 shows the details of the locus display circuit 20 for displaying the locus of the vehicle, and the initial position data I inputted from the keyboard 30 at the start of the trip is transferred to the coordinate conversion circuit 50 on the map. It is calculated with the coordinate data outputted from the adder circuit 36 of the data selection circuit 16, and is added to the traveling detection signal 1 in the adder circuit 52 at the next stage after performing coordinate transformation on the screen especially during scaling. The output trajectory data K is supplied to the matching circuit 54.

The travel trajectory f-ta is recorded in the video RAM 56,
An address counter 56 is provided to scan addresses when writing/reading the video RAM 56.
Writing or successive loading of the video RAM 56 is controlled. The function of the address counter 56 is to write and update (T) for a determined traveling distance, for example, every 5oIIl, in the traveling detecting section 22, which will be described later. bidet, t RAM56 writes space on the entire screen,
Temporarily erase the travel trajectory up to that point.

Writing/reading of the position screen of the address counter 58 is detected by the end detection circuit 60, and the video RAM 56
The man-made saw is controlled by the I10 port 62.

When writing a normal travel trajectory, the multi-break recorder 64 is switched by the output of the matching circuit 54 that compares the travel data with the address signal, and the scanning address of the video RAM 56 and the travel trajectory data match. Sometimes the multiplexer 64 selects a predetermined character, such as a black circle.
Writing to the RAM 56 is performed at each timing T mentioned above.

Further, in the case of the reduced scale mode, since the traveling trajectory becomes an obstruction on the screen, the multiplexer 64 writes space on the entire screen, and as a result, the traveling trajectory is erased from the screen. The video RAM 56 and the I10 port 62 are supplied with the timing signal T, the scale mode (M2) and the map mode return (M4) signals from an OR circuit 66.

FIG. 11 shows the details of the travel detection section 22, and as described above, the matching circuit 68 compares the travel distance of the vehicle with a predetermined distance m1l1, for example, 50 m, and outputs the timing signal T. , On the other hand, the direction detection unit 70 detects the vehicle (ff signal), converts it into a digital signal by the AD converter 72, and then calculates scale data A2 to A5 in the distance conversion circuit 74 and sends it to the trajectory display circuit 22. A running detection signal is also supplied.

FIG. 12 shows an example of the operation section 28, and as described above, the operation section 28 includes the keyboard 30 shown in FIG.
The input signal is converted into a signal by a decoder 76, the initial position data at the start of vehicle travel is stored in the keypad 78, and the map/scale 1-code signal is converted by the controller 76.
- Output from the roll key decoder 80 as signals M1 to M4).

The initial position signal of the key memory 78 is switched to the current position data by the multiplexer 82, and the current position memory 8
4 is stored. The multiplexer 82 is switched by a signal M4 from the map mode selection key 30f, and the input is switched when the display mode is returned from the scale mode to the map mode.

The reset key 30b in FIG. 6 is used to reset travel trajectory data and the like, and sets the initial state of the device when a new vehicle starts traveling. Further, the human power M1 performs a triggering action to supply initial position data and other information at the start of travel 1) selected by the key 30a to each part.

The present invention is characterized by the scale mode selection key 30d and the scale instruction selection key 30e, and the signal M2 obtained by operating the former key selects the display mode in place of the map that has been displayed on the screen up to that point. The latter is used to select an arbitrary scale in the scale mode, and after such a scale has been selected, the device returns to the scale mode by outputting the signal M4 from the map mode selection key 30f. You can return to the map display from

= 15 - FIG. 13 shows a preferred embodiment of the scale selection circuit 26,
It includes a ring counter 86, and after being reset by turning on the engine key 88, an arbitrary scale can be outputted as signals A2 to Δ5 depending on the number of times the scale instruction selection key 308 is operated.

FIG. 14 shows a scale mode display circuit 24 according to the present invention.
The scale mode display circuit 24 is substantially similar to the trajectory display circuit 20, and performs writing and reading operations for the cursor 10b shown in FIG. 7 in the video RAM 90. The position of the cursor 10b is determined by the signals A2 to A5 from the scale selection circuit 26, and this signal is sent to the decoder 92.
The cursor will be written in the video RAM 90. The multiplexer 94 controls switching between the cursor and the space, puts the cursor in a writable state by applying a signal M2, and erases the cursor on the screen by applying a signal M4 for converting to the map mode, so that the cursor can be changed to a normal map mode. Obstacles to display are removed.

The embodiment of the present invention has the above configuration, and its operation will be explained below.

When the vehicle starts running, the maximum scale map display as shown in Figure 2 mentioned above is displayed by turning on the engine key.
10, the initial position of the vehicle is entered on the map from the operating section 28, and the display of the traveling trajectory based on the traveling detection signal from the traveling detecting section 22 is continued.

Next, when the scale mode selection key 30d of the keyboard 30 is operated during normal driving, the map on the screen up to that point is erased and replaced by the scale scale 10 shown in FIG.
a and a cursor 10b are displayed on the screen.

Here, the driver can obtain a desired scale by operating the scale instruction selection key 30e a predetermined number of times, and in the embodiment, by operating the key 30e once, the scale of 1/8000 is
Further, by operating the key 3'Oe two times and three times in succession, respectively, a scale of 1/4000 and 1/1000 can be obtained.

FIG. 15 shows a state in which the scale instruction selection key 30e is operated twice to move the cursor 10b to the 1/4000 scale.
At this point, the scale selection circuit 26 stores the map ROM 1/1 in order to supply the corresponding scale signal to the map data selection circuit 16.
Predetermined map data of I will be read.

After the scale is selected, press the map mode selection key 3.
When 0f is pressed, as shown in FIG. 16, the screen is displayed at a half scale without showing the fine details.

[Effects of the Invention] As described above, according to the present invention, a change in scale is indicated by a scale mode displayed on the screen, that is, a scale scale and a cursor, and accurate scale changes can be quickly performed without erroneous operation. becomes possible.

Furthermore, according to the device of the present invention that separately displays the scale mode, the scale can be quickly changed within the circuit, and there is no need for the waiting time required in the past, so even when driving A detailed view of the vicinity of the holding position can be quickly displayed on the screen without delay, which is extremely useful for assisting driving.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the vehicle travel trajectory display device according to the present invention. FIG. 3 is an explanatory diagram showing the map in FIG. 2 divided into nine areas. FIG. Figure 5 is an explanatory diagram showing map data in the map ROM corresponding to Figure 4. Figure 6 is an explanatory diagram showing the keyboard of the operation section in Figure 1. , FIG. 7 is an explanatory diagram showing a display example of the selection mode in this embodiment, FIG. 8 is a block circuit diagram showing details of the map data selection circuit in FIG. 1, and FIG. FIG. 10 is a block circuit diagram showing details of the map display circuit used in this embodiment. FIG. 11 is a block circuit diagram showing details of the trajectory display circuit used in this embodiment. 12 is a block circuit diagram showing the details of the operating section 28 shown in FIG. 1. FIG. 13 is a preferred circuit diagram of the scale selection circuit 26 in FIG. Figure 14 is a circuit diagram showing details of the scale mode display circuit in Figure 1, Figure 15 is an explanatory diagram showing the state of cursor movement in scale mode, and Figure 16 is a diagram showing the details of the scale mode display circuit in Figure 1. 10 is an explanatory diagram showing an example of a map. 10... Display section, 14... Map ROM. 16... Map data selection circuit, 18... Map display circuit, 20... Trajectory display circuit. 22... Traveling detection section, 23... Scale mode display circuit, 26... Scale selection circuit, 28... Operation section, 30... Keyboard. Applicant: Rhythm Jikai Kogyo Co., Ltd. Agent Patent attorney Yoshi FJI ?iJl2 (and 1 other person)
7-36 Fig. 8 Fig. 9 Fig. 11 Fig. 12 Fig. 14 Fig. 14 A2-A5 Texture type ν spindle 1-Distortion (M4 8 hoof ND Fig. 15 Date 61 Fig. 16

Claims (1)

[Claims] (1) A map ROM that stores multiple types of map data of different scales for the same area, and a map data selection circuit that reads desired map data from the map ROM based on an input signal from a map selector. , a map display circuit that displays a map of the selected area on a display unit based on the read map data; a travel detection unit that detects the travel direction and distance of the vehicle; and a travel detection unit that detects the travel direction and distance of the vehicle based on the signal from the travel detection unit a trajectory display circuit for displaying a driving trajectory superimposed on a map on the display section; an operation section including a scale mode selection key and a scale instruction selection key;
A scale mode display circuit that displays a scale mode on the display section, and a scale selection circuit that selects map data of a desired scale from the map ROM, and by selecting an arbitrary scale mode on the display screen. A travel trajectory display device for a vehicle, characterized by displaying a map of a selected scale including the current location.