JPH0934354A - Running position display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enlarge the displayed map region along the direction of the vehicle' s movement and to enlarge the map transversal to the direction, when required, by providing a rotational display means in which the aspect ratio of the display screen is overlapped. SOLUTION: A liquid crystal display 28 is freely rotatable by 90 degrees and a lateral and longitudinal display screens are switched by the rotation. A detector 29 detects whether the display 28 is in the longitudinal shape or lateral shape. When the detector 29 detects that the display is in a longitudinal shape, the map data stored in a DRAM 12 are read out under the control of a CPU 10, the data are converted into picture data by a picture processor 15 and a vertically long map is displayed. By rotating the display means, the longitudinal or lateral map is automatically shown on the display.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a travel position display device for displaying the current position of a car or the like on a display device together with a map.

[0002]

2. Description of the Related Art FIG. 4 schematically shows a conventional vehicle-mounted traveling position display device. In FIG. 4, reference numeral 1 denotes an azimuth sensor, and this azimuth sensor 1 uses a geomagnetic sensor for detecting the absolute traveling azimuth of the automobile and an optical gyro for detecting the relative traveling azimuth of the automobile. Reference numeral 2 is a distance sensor that generates a pulse according to the number of rotations of the wheel, and 3 is various sensor signals such as an ON / OFF signal of a brake switch and a parking switch, and a power supply voltage monitoring signal. 4 is a sensor signal processing unit that processes sensor signals from the azimuth sensor 1 and the distance sensor 2, and 5 is a GPS (Global Positioning System)
The GPS receiver 5 is a receiver, and is capable of obtaining the position (latitude, longitude) of the receiving point by receiving and calculating radio waves transmitted from a plurality of satellites.
Reference numeral 6 denotes a CD-ROM drive, and this CD-ROM drive 6 reads map data and the like from a CD-ROM 7 in which map data is recorded. Reference numeral 8 denotes a display / operation unit installed in the vehicle interior. The display / operation unit 8 is provided on a liquid crystal display 8A for displaying a map and the current traveling position, direction, etc. of the automobile, and is provided in front of the liquid crystal display 8A. The touch panel 8B and the touch panel 8B.
B is equipped with a switch for instructing enlargement or reduction of the displayed map, a switch for instructing a route search, a switch for selecting a destination from the place names displayed on the liquid crystal display 8A, and the like.

Next, the configuration of the apparatus main body 9 will be described.
Reference numeral 10 denotes a CPU (central processing unit) for performing various calculations, 11
Is a ROM (read only memory) in which programs for various calculations performed by the CPU 9 are stored, and 12 is data from the direction sensor 1, distance sensor 2, GPS receiver 5, CD-ROM drive 6 and the like, calculation results by the CPU 10, etc. Is a memory (DRAM) for storing data, 13 is a backup memory (SRAM) for holding necessary data even when power supply to the apparatus body 9 is stopped, and 14 is a character displayed on the liquid crystal display 8A. A memory (kanji, font ROM) in which patterns such as symbols are stored, 15 is an image processor for forming a display image based on map data, current position data of the vehicle, and 16 is a CPU 10
Map data, current location data and kanji output from
A memory (VRAM) for storing images to be displayed on the liquid crystal display 8A by synthesizing kanji and fonts such as street names and road names output from the font ROM 14;
This is an RGB conversion circuit for converting the output data of M16 into a color signal, and the color signal is output from the RGB conversion circuit 17 to the liquid crystal display 8A. Reference numeral 18 is a communication interface. Reference numeral 19 is a voice processor, which creates a predetermined voice message based on a command from the CPU 10.
The voice message created in 9 is output from the speaker 20.

FIG. 5 shows a format of data stored in the CD-ROM 7, 21 is a disc label, and 2 is a disc label.
2 is a drawing parameter, 23 is map leaf management information, 24 and 25
Is a figure leaf, which has background data, character data,
It stores road data and the like, and stores data for each unit map obtained by dividing a topographic map of the whole of Japan by latitude and longitude. The map leaf is set from a map leaf that roughly describes a wide area to a map leaf that describes a narrow area in detail. Each map leaf is composed of map display levels A, B, and C that describe the same area. Regarding the map display levels A, B, and C, B is described in more detail than A and C is described in more detail than B. Each map display level A, B, C is composed of map display level management information and a plurality of units. The unit describes a divided area obtained by dividing the area of each map display level into a plurality of areas, and each unit includes a unit header, a character layer, a background layer, a road layer, an option layer, and the like. In the character layer, the place name displayed on the map,
Road names, facility names, etc. are recorded.
Data for drawing facilities and the like is recorded, and in the road layer, as shown in FIG. 6, data on coordinate points (nodes) and lines (links) that describe roads including intersections, for example, node numbers of nodes. , Latitude, longitude, link number of link, link distance, etc. are stored. In FIG. 6, circles (∘) indicate nodes, and lines between the nodes indicate links. Also, a black circle with a node number of 4 (●)
Indicates an intersection node. The data recorded in the road layer is not directly involved in the map display,
It is used as road network information for map matching.

In FIG. 4, the output of the azimuth sensor 1 and the output of the distance sensor 2 are sent to the CPU 10 via the sensor processing unit 4.
Sent to The CPU 10 calculates the current position of the vehicle and obtains the latitude and longitude of the current position. Also GPS
The current position is corrected based on the data from the receiver 5. Based on the present position thus obtained, the map data of the unit corresponding to the present position is read from the CD-ROM 7 by the CD-ROM drive 6, and this map data is stored in the memory (DRAM) 12 via the communication interface 18. Is stored. A part of the map data stored in the DRAM 12 is read by the CPU 10,
It is converted into image data by the image processor 15 and written in the image memory 16. The image data stored in the image memory 16 is converted into a color signal by the RGB conversion circuit 17 and sent to the liquid crystal display 8A, and a map of a predetermined range centering on the current position is displayed. If the map data read from the DRAM 12 contains character codes and symbol codes, patterns corresponding to these character codes and symbol codes are read from the kanji and the font ROM 14, and characters such as place names are displayed on the liquid crystal display 8A together with the map. , School, etc. are displayed. In addition, the current position displayed on the liquid crystal display 8A is sequentially changed based on the traveling speed and traveling direction that are sequentially obtained as the automobile travels.

FIG. 7 shows a display example of the liquid crystal display 8A. A road map is displayed, along with place names, intersection names, road names, and the like. In FIG. 7, reference numeral 26 indicates a vehicle mark of the vehicle, and this vehicle mark 26 indicates the current position and the traveling direction of the vehicle. Reference numeral 27 denotes a guide route to the destination searched when the route search is performed by inputting the destination with the destination input means. At the scale of the map shown in FIG. 7, the destination is a liquid crystal display. It is not displayed on the display screen of 8A.

[0007]

The aspect ratio of the display surface of the liquid crystal display 8A used in the above-mentioned conventional example is smaller in the vertical direction, the display area in the traveling direction is smaller than the left and right display areas, and a driver is required. There was a problem that the display map area in the traveling direction was small.

The present invention eliminates the above-mentioned conventional drawbacks, and it is possible to widen the display map area in the traveling direction or to widen the display map areas on the left and right in the traveling direction as required. It is intended to provide a display device.

[0009]

The first invention of the present invention is as follows:
In order to achieve the above object, a vehicle position detecting means for detecting a vehicle position, a means for reading out map data corresponding to the vehicle position detected by the vehicle position detecting means from a storage means, and a display screen. Rotatable display means having different aspect ratios,
The display means for detecting the rotation state of the display means, and means for displaying the map data read from the storage means and the vehicle position detected by the vehicle position detection means on the display means, The display means displays a vertically long map or a horizontally long map based on the detection result of the detection means.

A second aspect of the present invention is a vehicle position detecting means for detecting the vehicle position, and a means for reading out map data corresponding to the vehicle position detected by the vehicle position detecting means from the storage means. A rotatable display means having a different aspect ratio of the display screen, an angle detection means for detecting the rotation angle of the display means, the map data read from the storage means and the own vehicle position detection means. The display map is changed according to the detection result of the angle detection means.

[0011]

The present invention has the above-described structure, and when the display means is rotated by approximately 90 ° to form a vertically long screen, the vertically long screen is automatically displayed on the display means according to the detection result by the detection means. A map can be displayed, and when the display means is a horizontally long screen, the horizontally long map can be automatically displayed. According to the second aspect of the present invention, the rotation angle of the display means is detected by the angle detection means, and the map displayed on the display means can be automatically changed according to the detected angle. is there.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, the same parts as those in the conventional example shown in FIG. 4 are designated by the same reference numerals. In FIG. 1, 28
Is a liquid crystal display having a large aspect ratio, and the liquid crystal display 28 can be rotated by 90 °. By rotating the liquid crystal display 28 by 90 °, it is possible to switch between a horizontally long display screen and a vertically long display screen. It is a thing. Reference numeral 29 denotes a detector that detects whether the liquid crystal display 28 is in a vertically long state or a horizontally long state. The detector 29 is turned on when the liquid crystal display 28 is in the horizontally long state, and the liquid crystal display 28 is detected. It is composed of a switch that turns off when is in a portrait orientation. The detection signal of the detector 29 is input to the CPU 10 via the communication interface 18.

FIG. 2 shows a state where the liquid crystal display 28 is used in a horizontally long state. In this horizontally long state, the left and right display areas are wide, but the upper and lower display areas are narrow.
Here, when the liquid crystal display 28 is rotated approximately 90 ° in the clockwise direction (direction of arrow R) from the state shown in FIG.
The state shown in is shown. When the detector 29 detects that the liquid crystal display 28 is in the vertically long state, CP
Under the control of U10, the map data stored in the DRAM 12 is read, converted into image data by the image processor 15, and written in the image memory 16. The image data stored in the image memory 16 is converted into a color signal by the RGB conversion circuit 17 and sent to the liquid crystal display 28, and a vertically long map shown in FIG. 3 is displayed. In the state shown in FIG. 3, rotate the liquid crystal display 28 90 ° counterclockwise,
When the state shown in FIG. 2 is entered, the map display shown in FIG. 2 is restored.

As described above, according to the above embodiment, by rotating the liquid crystal display 28, the display screen can be automatically changed to a horizontally long display screen or a vertically long display screen.

In the above embodiment, the detector 29 for detecting the horizontally long state and the vertically long state of the liquid crystal display 28 is used. However, an angle detector for detecting the rotation angle of the liquid crystal display 28 is used for detection. The map displayed on the liquid crystal display 28 may be changed according to the angle.

[0016]

Industrial Applicability The present invention has the above-mentioned structure, and can automatically display a vertically long map or a horizontally long map by rotating the display means. When an angle detector that detects the rotation angle of the display means is used,
This has the advantage that a map can be displayed according to the rotation angle of the display means.

[Brief description of drawings]

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

FIG. 2 is a display diagram showing a display example of a liquid crystal display in the embodiment.

FIG. 3 is a display diagram showing another display example of the liquid crystal display in the embodiment.

FIG. 4 is a block diagram of a conventional traveling position display device.

FIG. 5 is a memory configuration diagram showing a format of a conventional CD-ROM.

FIG. 6 is a memory block diagram showing road data recorded in a conventional CD-ROM.

FIG. 7 is a display diagram showing a display example of a conventional liquid crystal display.

[Explanation of symbols]

 1 Direction Sensor 2 Distance Sensor 5 GPS Receiver 6 CD-ROM Drive 7 CD-ROM 9 Device Main Body 10 CPU 15 Image Processor 28 Liquid Crystal Display 29 Detector

Claims (2)

[Claims] 1. A vehicle position detecting means for detecting a vehicle position, a means for reading out map data corresponding to the vehicle position detected by the vehicle position detecting means from a storage means, and an aspect ratio of a display screen. Different rotatable display means, detection means for detecting the rotating state of the display means, map data read from the storage means and the vehicle position detected by the vehicle position detection means. Means for displaying on a means, and the display means displays a vertically long map or a horizontally long map based on the detection result of the detecting means. 2. A vehicle position detecting means for detecting a vehicle position, a means for reading out map data corresponding to the vehicle position detected by the vehicle position detecting means from a storage means, and an aspect ratio of a display screen. Different rotatable display means, angle detection means for detecting the rotation angle of the display means, map data read from the storage means, and the vehicle position detected by the vehicle position detection means. A traveling position display device, comprising: a means for displaying on a display means, wherein the display map is changed according to the detection result of the angle detection means.