JPH0716968Y2 - Vehicle display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Industrial Application Field >> The present invention relates to a display device for a vehicle, which is improved in terms of display mode so that it can be easily read during driving.

<< Prior Art >> As a conventional display device for this type of vehicle, for example, Japanese Patent Laid-Open No.
The one described in JP-A-267778 is known.

In this vehicular display device, an image display device is installed at a position inside the vehicle facing the driver's seat, and various information necessary for driving, such as map information, is displayed on the image display device.

<Problems to be solved by the invention> However, in such a conventional vehicle display device, a detailed dense map is displayed regardless of the driving speed, that is, the amount of information is mainly used. Since the map is displayed according to the display mode, there is a problem that it is difficult for the driver to read while driving (see FIG. 9).

<Purpose of Invention> In view of the above problems, the present invention can provide a wealth of information to the driver while driving at a low speed where there is room to gaze at the display screen, while concentrating on driving. An object of the present invention is to provide a vehicular display device capable of confirming display information at a glance in a high-speed traveling state.

<Structure of device> The present invention is configured as shown in the claim correspondence diagram shown in Fig. 1 in order to achieve the above-mentioned object. An image display is installed at a position in the vehicle facing the driver's seat, and various information necessary for driving is provided. In a vehicle display device adapted to display, a map information storage means a for storing map information, and a position information detection means for detecting a vehicle's current position, traveling locus, traveling direction and destination direction as position information of the vehicle. b
A traveling speed detecting means c for detecting the traveling speed of the vehicle; and when the traveling speed detected by the traveling speed detecting means c is a certain speed or less, the map information stored in the map information storing means a and the position When the traveling speed detected by the traveling speed detecting means c and the first display means d for superimposing and displaying the positional information detected by the information detecting means b exceeds a certain speed, the positional information detecting means b detects the traveling speed. Second display means e for displaying the displayed position information
And having.

<< Description of Embodiments >> Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 2 is a block diagram showing the basic configuration of a vehicle display device according to the present invention.

First, the configuration will be described. In this embodiment, the input operation unit 8 and the CPU
1, system ROM2, RAM3, video RAM6, CRT7, distance sensor 4, direction sensor 5, sensor interface 10, and external memory 9.

The input operation unit 8 includes the system main SW 8a and the touch panel 8b.
The switch signal of is converted so that it can be processed by CPU1.

The CPU 1 is for performing calculations of the present location and various display processing described later, and is, for example, an 8-bit microprocessor.

The system ROM 2 is a program in which a program describing the calculation and processing procedures is recorded.

The RAM 3 is a readable / writable storage element for temporarily storing data and the like when performing the above-mentioned calculation and processing, and includes a current position register, a traveling locus memory, a stack pointer and the like.

The video RAM 6 is composed of (a) and (b) and is a buffer memory for displaying an image on the CRT 7. The capacity is for a plurality of screens, and one screen can be displayed independently or a plurality of screens can be displayed in an overlapping manner.

The distance sensor 4 is a sensor that pulse-counts the number of rotations of the wheels.

The orientation sensor 5 is a sensor such as a geomagnetic sensor or a gyro that detects the traveling orientation of the vehicle.

The sensor interface 10 outputs the above two sensor signals.
It is converted into a digital amount so that it can be processed by CPU1.

The external memory 9 is a semiconductor ROM, a CD-ROM or the like in which map data, name search data and the like are recorded.

The video RAM controller 11 is a device that controls the display of data for each screen (a) and (b) of the video RAM 6 individually or in combination according to an instruction from the CPU 1. is there.

The apparatus of this embodiment is configured as described above. Next, the processing procedure will be described based on the flowchart of FIG.

First, it is determined whether or not the main SW8a is turned on (step 30
0), if it is on (YES in step 300), the starting point setting process and the destination setting process are started (step 302).

The origin setting is shown in Fig. 4 (A), (B), (C),
The display of (D), is performed according to the operation of the touch panel 8b according to the procedure of the flowchart of FIG. 5, in which case (A), (B), (C), (D), and FIG. The stored contents of the external memory 9 shown in (E) are used.

Further, the destination setting is performed in exactly the same way as the above-mentioned starting point setting.

When the starting point and the destination are set as described above, as shown in FIG. 3 (B), the enlarged map data including the starting point and the enlarged map data for eight surrounding areas are stored in the RAM 3 from the external memory 9.
Read in (step 304).

Then, the map data having the current position is transferred to the area (b) for one screen of the video RAM 6.

When the traveling is started, the present position is calculated by performing an integral calculation by interruption every constant distance ΔD traveling according to the procedure of the flowchart shown in FIG. 7 (A).

At the same time, in accordance with the procedure of the flowchart shown in FIG. 7 (B), the calculation processing for displaying the arrow pointing to the destination at the interruption every constant distance ΔD is performed, and the flowchart shown in FIG. 7 (C). In order to display the traveling azimuth of the vehicle by interruption every running of the fixed distance ΔD, the calculation process for displaying the head position (current position) of the trajectory in a triangle is performed in accordance with the procedure of.

Next, these processing results are written in the area (a) for one stroke of the video RAM 6.

When only (a) of the video RAM 6 is displayed, the image of FIG. 3 (D) is displayed on the CRT 7 (step 306).

The running locus is displayed by leaving the data of the current position as it is.

Next, when the current position is out of the area of the first enlarged map, the next three pieces of map data in the direction in which the current position is removed are transferred from the external memory 9 to the video RAM 6 (b). When transferred, the map data for the other three sheets is deleted from the video RAM 6 (b). This allows the map to be scrolled. (Step 308).

Next, determine the current vehicle speed (step 310), for example 10K
If the speed is lower than m / h (YES in step 310), video R
Video RAM (b) where the map data with the current position is transferred to the AM controller 11 and video RAM where the current position, traveling locus, destination direction, and traveling direction data are transferred
An instruction to display (a) in a superimposed manner is output (step 312).

As a result, information about the position of the vehicle is displayed on the map as shown in FIG. 3 (E).

On the other hand, if the vehicle speed is higher than 10 km / h (step 310, N
O), the command to display only video RAM (a)
Output to the controller 11 (step 316).

Upon completion of the above series of processing, it is determined whether or not the main SW 8a is on (step 314), and if it is on (YES at step 314), the procedure returns to the processing for displaying the information regarding the position of the vehicle, and Repeat the process. If it is off (NO in step 314), all the processes are ended.

Next, a second embodiment of the present invention will be described.

The configuration of this embodiment is the same as that of the third embodiment except that the area (c) is provided in the video RAM, and the processing procedure is the eighth.
The flow chart is as shown in the figure.

In this example, the processing procedure is different from that of the first embodiment,
When updating the map data, the mesh data of 1 km, for example, is stored in the video RAM 6 (c) in the same manner as the map data.
When the vehicle speed is higher than 10 Km / h (NO in step 410), the data is transferred from the external memory 9 along with the movement of the current position to the mesh data with the current position in the video RAM controller 11. Video RAM 6 being transferred
(C) and (a) of the video RAM 6 to which the data of the current position, the traveling locus, the direction of the destination, and the direction of travel are transferred are output. (Step 41
2).

As a result, as shown in FIG. 8 (F), information about the position of the vehicle is displayed on the 1 Km mesh.

In the present embodiment, the display screen is a map around the current location, but it may be another screen, for example, a display screen of a map of an arbitrary place selected by the driver.

The image display method may be an analog drawing method such as still video.

Furthermore, in each of the above embodiments, the map information is stored in the external memory 9, but instead of this, it may be stored in a dedicated ROM, or the map information may be received via a wireless communication medium. Of course.

<< Advantages of the Invention >> As described above, the vehicle display device according to the present invention detects the map information and the position information stored in the map information storage means when the traveling speed detected by the traveling speed detecting means is equal to or less than a certain speed. The position information detected by the means is superimposed and displayed, and when the traveling speed detected by the traveling speed detecting means exceeds a certain speed, the position information detected by the position information detecting means is displayed. A person can visually recognize a display screen corresponding to the traveling speed from the driver's seat during traveling, and at the same time, readability can be secured while traveling while maintaining the function as the vehicle display device.

[Brief description of drawings]

FIG. 1 is a diagram corresponding to the claims of the present invention, FIGS. 2 to 7 are explanatory views of the processing procedure of the first embodiment of the present invention, and FIG. 8 is a processing procedure of the second embodiment of the present invention. FIG. 9 and FIG. 9 are examples of display screens in the conventional example. 1 …… CPU 2 …… System ROM 3 …… RAM 4 …… Distance sensor 5 …… Direction sensor 6 …… Video RAM 7 …… CRT 8 …… Input operation section 9 …… External memory 10 …… Sensor interface

Front page continuation (72) Inventor Wataru Yagihashi 2 Takara-cho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd. (72) Inventor Okihiko Nakayama 2 Takara-cho, Kanagawa, Yokohama, Kanagawa Prefecture (72) Inventor Kiyomichi Yamada 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd. (56) Reference JP 61-156275 (JP, A) JP 61-205975 (JP, A) JP 63- 265113 (JP, A) JP 58-182683 (JP, A) Actual development 63-122898 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A vehicle display device in which an image display device is installed at a position in the vehicle facing the driver's seat to display various information necessary for driving, and map information storage means for storing map information, Position information detecting means for detecting the current position of the vehicle, traveling locus, traveling direction and destination direction as vehicle position information, traveling speed detecting means for detecting traveling speed of the vehicle, and traveling speed detecting means for detecting the traveling speed of the vehicle. When the traveling speed is equal to or lower than a certain speed, the first display means for displaying the map information stored in the map information storage means and the position information detected by the position information detecting means in an overlapping manner, and the traveling speed detecting means. A second display unit for displaying the position information detected by the position information detecting unit when the detected traveling speed exceeds a certain speed. Vehicle display apparatus according to symptoms.