JPH08220993A - On-vehicle navigation display device - Google Patents

Abstract

PURPOSE: To reduce fatigue of a driver by providing map information with a rich information amount to the driver while traveling at low speed and displaying an advance direction conduct arrow image easy for reading while traveling at a high speed. CONSTITUTION: A speed decision means 3 inputs a speed signal from a speed signal input part 1 and a reference signal from a reference signal generation means 2, and outputs a decision signal when a traveling speed exceeds a reference traveling speed. Then, when the traveling speed is the prescribed reference speed or below, since no decision signal is outputted from the speed decision means 3, a switch means 7 supplies only map image information from a first recording/reproducing means 4 to a display means 8, and it displays a map image specified by an input means 6 on a display screen 8a. Then, when the traveling speed exceeds the reference signal, the switch means 7 supplies the auxiliary information of the map image information at the point of time, e.g. advance direction conduct arrow information from a second recording/ reproducing means 5 to the display means 8 to display it on the display screen 8a by the decision signal from the speed decision means 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular navigation display device in which a display during driving can be easily read.

[0002]

2. Description of the Related Art In conventional vehicle navigation display devices, the development of TFTs (thin film transistors) has made it possible to graphically display the vehicle speed and direction required for a traveling vehicle.

[0003]

However, in the above-mentioned conventional vehicle navigation display device, a detailed map with a high density is displayed regardless of the driving speed, that is, a map display mainly based on the amount of information is performed. Therefore, there is a problem that it is difficult for the driver to read the display while driving. Further, there was also a method of relying on the display mode of only the graphic display for indicating the course direction without displaying the map image, but this is difficult for the driver to specify where the vehicle is geographically located and the current location. There was a problem.

[0004]

An object of the present invention is to solve the above-mentioned conventional problems. For example, in a low-speed running state where there is a room to gaze at the display screen, it is possible to provide the driver with a wealth of information and An object of the present invention is to provide a vehicular navigation display device capable of confirming display information in an instant in a high-speed traveling state where the user must concentrate on the vehicle.

[0005]

In order to achieve the above object, the present invention provides a vehicle navigation display device for displaying various information on a display screen installed near a driver's seat in a vehicle. A speed determination means for determining whether or not the traveling speed exceeds a predetermined reference speed, and when the traveling speed is determined to be less than or equal to the reference speed by the speed determination means, a map image display mainly based on the information amount is performed,
When the speed exceeds the reference speed, the switching means is provided for displaying the traveling direction guidance arrow image mainly for readability.

[0006]

With the above structure, the present invention provides the driver with map information having a large amount of information during low-speed traveling where there is enough room to gaze at the display screen, and during high-speed traveling where the driver should concentrate on driving.
Since the traveling direction guidance arrow image is displayed mainly for readability, it is possible to reduce driver fatigue and contribute to safe driving.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of a vehicle navigation display device according to an embodiment of the present invention. In FIG. 1, 1 is a speed signal input section, 2 is a reference signal generating means, 3 is a speed determining means, 4 is a first recording / reproducing means, 5 is a second recording / reproducing means, 6 is an input means, and 7 is a switch. Means, 8 is a display means, and 9 is a measuring means for measuring the speed of the automobile.

The speed signal input section 1 inputs a speed signal relating to the traveling speed of the automobile measured by the measuring means 9, and the speed signal inputted from this is given to the speed judging means 3.

The reference signal generating means 2 generates a reference signal indicating a reference traveling speed, and the reference traveling speed is set by
The driver can be arbitrarily set by external input means (not shown).

The speed judging means 3 inputs the speed signal from the speed signal input section 1 and the reference signal from the reference signal generating means 2 and outputs a judgment signal when the traveling speed exceeds the reference traveling speed. It is configured. That is, the speed determination means 3 does not output the determination signal until the traveling speed exceeds the predetermined reference traveling speed, and outputs the determination signal only when the traveling speed exceeds the predetermined reference traveling speed.

The first recording / reproducing means 4 stores a large number of map image information as shown in FIG. 2, and is configured to output the image information designated by the input means 6 one by one.

The second recording / reproducing means 5 stores auxiliary information relating to the image information designated by the input means 6, and is designated by the input means 6. As the auxiliary information, in addition to general auxiliary information such as an enlarged intersection name and a surrounding map, a traveling direction guide arrow image as shown in FIG. The driver can arbitrarily select whether to use general auxiliary information or the traveling direction guidance arrow image by the designation signal forming means 6a of the input means 6.

Although the first and second recording / reproducing means 4 and 5 are separately configured in this embodiment, a buffer for recording / reproducing one image information to be displayed on the display means 8 is provided. 4a and a buffer 5a for recording / reproducing the auxiliary information relating to the image information for one sheet may be configured as one recording / reproducing means respectively having each.

The input means 6 is connected to the first and second recording / reproducing means 4 and 5, and designates one image information from the image information stored in the first recording / reproducing means 4. The signal for specifying one piece of auxiliary information from the auxiliary information stored in the second recording / reproducing means 5 is similarly generated. This update of the designation signal is automatically executed by the current position recognizing means 6b, and changes according to the change in the current position of the automobile. As the present location recognizing means 6b, one using GPS or beacon, one using self-contained navigation, or a combination thereof can be used.

The switch means 7 is the first recording / reproducing means 4
The specified image information from the second recording / reproducing means 5 and the auxiliary information from the second recording / reproducing means 5 are input, and either one of the information is output based on the determination signal from the speed determining means 3. .

In the above-mentioned structure, in this embodiment, when the speed is equal to or lower than the preset reference speed, the speed determining means 3 does not output the determination signal.
Means 8 for displaying only the map image information from the recording / reproducing means 4 of FIG.
And the map image designated by the input means 6, for example, as shown in FIG. 2 is displayed on the display screen 8a.

Next, when the traveling speed of the vehicle exceeds the above-mentioned reference signal, the switch means 7 responds to the determination signal from the speed determination means 3, and the auxiliary information of the map image information at that time, for example, FIG. The traveling direction guide arrow information as shown in (b) is supplied from the second recording / reproducing means 5 to the display means 8 and displayed on the display screen 8a.

In the traveling direction guidance arrow image, the upper side of the display screen 8a is the front direction of the vehicle, the lower side of the display screen 8a is the rear direction of the vehicle, and the left and right sides of the display screen 8a are the left and right directions of the vehicle, respectively. Is drawn by a perspective drawing method in which the front is gradually reduced, and is devised so that it is easy to understand the relationship with the traveling direction of the automobile. Further, as shown in the figure, simple guide characters such as “straight ahead” and “200 m ahead” in the forward direction of the traveling direction may be displayed together.

In the above embodiment, the driver preliminarily determines whether to use the general auxiliary information such as the enlarged intersection name or the surrounding map or the image of the traveling direction guidance arrow.
However, the reference speed is divided into two steps, and general auxiliary information is used at medium speed, and the arrow image is used at high speed. Good. Alternatively, the arrow image alone may be used.

Also, depending on the driver's taste, the map image information is displayed on the display means 8 from the first recording / reproducing means 4 when the reference signal is exceeded, and the traveling direction guidance arrow information is displayed when the reference signal is less than the reference signal. The setting of the switch means 7 may be changed so that it is displayed on the screen 8.

[0021]

As described above, according to the present invention, if the traveling speed of the automobile is equal to or lower than the reference speed, it is possible to allow time to understand the information. Therefore, the map image information having a large amount of information is displayed on the display means. When the speed exceeds the reference speed, the visual comprehension time is shorter than that of the map image information.The direction guidance arrow information is displayed on the display means, so the driver can drive safely in a car navigation system with less fatigue. You can

[Brief description of drawings]

FIG. 1 is a schematic block diagram showing an embodiment of a vehicle navigation display device of the present invention.

FIG. 2 is a display screen diagram showing an example of map image information according to an embodiment of the present invention.

FIG. 3 is a display screen view showing an example of a traveling direction guide arrow image in one embodiment of the present invention.

[Explanation of symbols]

 1 speed signal input section 2 reference signal generating means 3 speed judging means 4 first recording / reproducing means 5 second recording / reproducing means 6 input means 7 switch means 8 display means 9 measuring means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Fumio Kosuga 4-3-1, Tsunashima-higashi, Kohoku-ku, Yokohama-shi, Kanagawa Matsushita Communication Industrial Co., Ltd.

Claims (3)

[Claims] 1. A vehicle navigation display device configured to display various kinds of information on a display screen installed near a driver's seat in a vehicle, and a speed for determining whether or not the current traveling speed of the vehicle exceeds a predetermined reference speed. When the traveling speed is determined to be less than or equal to the reference speed by the determination means and the speed determination means, the map image display is performed mainly based on the information amount, and when the traveling speed exceeds the reference speed, the progress mainly based on readability is performed. A navigation display device for a vehicle, comprising: a switching unit that displays a direction guidance arrow image. 2. The traveling direction guidance arrow image is drawn by perspective drawing with the upper side of the display screen as the front direction of the host vehicle and the lower side of the display screen as the rear direction of the host vehicle. The vehicle navigation display device described. 3. The vehicle navigation display device according to claim 1, wherein the traveling direction guidance arrow image also displays a character for guiding the front of the traveling direction.