JPH047013Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a vehicle display device that lights up a display area of a display device provided on a windshield to notify a safe distance from a preceding vehicle.

(Prior Art) Various warning devices have been proposed to prevent rear-end collisions between one's own vehicle and a preceding vehicle or a following vehicle.

For example, in Japanese Patent Application Laid-Open No. 58-177733, "Rear-end Collision Prevention Device," the distance between the preceding vehicle or the following vehicle is measured, and it is determined whether the distance between the vehicles is dangerous or not based on the traveling speed of the own vehicle. A device that provides an alarm has been proposed.

Conventionally, the display devices used in this type of device are a display installed on the rear tray behind the rear seat for the following vehicle, and a display installed on the instrument panel for the own vehicle. Depending on the device, there were many devices that gave warnings of danger, either verbally, using lamps, or buzzers.

(Problem that the invention aims to solve) However, with the above-mentioned display device, even though it was known that it was dangerous, it was difficult to know what distance between vehicles should be set, and the driver had no choice but to rely on his experience. . For this reason, it is difficult for beginners to quickly and easily maintain a safe distance from the preceding vehicle.

The purpose of this invention is to light up the display area of the indicator installed on the windshield to inform you of the safe distance from the vehicle in front, and to brake your vehicle so that the vehicle in front enters the display area to ensure safety. To provide a display device for a vehicle that can quickly and easily maintain a safe distance from a preceding vehicle by maintaining an inter-vehicle distance.

(Means for Solving the Problems) In order to achieve the above object, a vehicle display device according to the present invention is a vehicle display device that displays a safe distance between the host vehicle and a preceding vehicle. a distance measuring device that measures the actual inter-vehicle distance of the preceding vehicle; a vehicle speed sensor that detects the traveling speed of the own vehicle; and a distance measuring device that is attached to a windshield when the driver of the own vehicle looks at the preceding vehicle through the windshield. a display device having a plurality of display areas corresponding to inter-vehicle distances; calculates a safe inter-vehicle distance according to a predetermined map from the vehicle speed; compares the safe inter-vehicle distance with the actual inter-vehicle distance; The present invention further includes: a display control circuit that lights up the display area of the display corresponding to the safe inter-vehicle distance when the actual inter-vehicle distance becomes shorter than the safe inter-vehicle distance.

(Example) The present invention will be described in detail below with reference to the drawings and the like.

FIG. 1 is a block diagram showing an embodiment of the vehicle display device according to the present invention, FIG. 2 is a diagram showing a distance measuring device used in the device of the embodiment, and FIG. 3 is a diagram showing the device of the embodiment. FIG. 4 is a flowchart showing the operation of the controller, FIG. 4 is a diagram showing a map for determining the safe inter-vehicle distance from the vehicle speed stored in the controller, and FIGS. A diagram showing an example of a liquid crystal display used,
FIG. 7 is a diagram for explaining the operation of the vehicle display device according to the present invention.

In FIG. 1, 1 is a distance measuring device, 2 is a vehicle speed sensor, 3 is a manual switch, 4 is a controller, 5 is an LCD driver, 6 is a liquid crystal display, and 7
is an alarm device.

The distance measuring device 1 is a device for measuring the distance between the host vehicle and the preceding vehicle, and for example, as shown in FIG. This is a device that measures the distance to a car. The vehicle speed sensor 2 is a sensor that detects the traveling speed of the own vehicle and outputs a vehicle speed pulse signal.
The manual switch 3 is a switch used for checking the inter-vehicle distance, etc. The outputs of the distance measuring device 1, vehicle speed sensor 2, and manual switch 3 are each connected to a controller 4.

The controller 4 operates according to the flowchart shown in FIG. 3 to output a display area signal.

The controller 4 calculates the inter-vehicle distance L between the own vehicle and the preceding vehicle from the distance measurement signal from the distance measuring device 1 (41), calculates the vehicle speed V of the own vehicle from the vehicle speed pulse from the vehicle speed sensor 2 (42), and calculates the vehicle speed V from the vehicle speed pulse from the vehicle speed sensor 2. Based on V, the safe inter-vehicle distance SL is calculated from the map shown in FIG. 443.

Next, it is determined 44 whether the output of the manual switch 3 is on or not. If the output of the manual switch 3 is on, a display area signal corresponding to the safe inter-vehicle distance SL calculated in step 43 is output for several seconds 47.

At this time, if the output of the manual switch 3 is off, the safe following distance SL and the actual following distance L are compared 45, and if the safe following distance SL≦the actual following distance L, then
The process returns to step 41 and repeats the same operations 41 to 45. If safe inter-vehicle distance SL > actual inter-vehicle distance L, a warning signal is output and 4
6. Output a display area signal corresponding to the safe following distance SL for several seconds. 47.

The output of the controller 4 is connected to a liquid crystal display 6 via an LCD driver 5 and also to an alarm device 7.

The liquid crystal display 6 has liquid crystal patterns 61 to 64 arranged on a windshield 8, as shown in FIG. As shown in FIG. 6, each area of the liquid crystal patterns 61 to 64 is such that the liquid crystal pattern 61 is an area where the safe following distance SL is 10 m to 30 m, and the liquid crystal pattern 62 is an area where the safe following distance SL is 30 m to 50 m. , LCD pattern 63 indicates safe following distance SL
is an area of 50m to 100m, and the liquid crystal pattern 64
is the area where the safe following distance SL is 100m to 200m.
This arrangement is based on the consideration that when the driver looks at the preceding vehicle through the windshield 8, the distant preceding vehicle appears above the windshield 8, and the nearby preceding vehicle appears below. That is, the liquid crystal patterns 61 to 64 are applied to the windshield 8 such that the position of the preceding vehicle matches the area of the pattern.

The warning device 7 is a device that uses a buzzer or the like to warn that the distance between vehicles has become too close, and also prompts the driver to look at the display 6.

Next, the operation of the vehicle display device according to the present invention will be explained with reference to FIG.

Assume that the vehicle speed is 80 km/h and the distance between vehicles is 70 m. If the safe following distance for a vehicle speed of 80 is 60 m from the map, then the safe following distance SL
is longer than the actual inter-vehicle distance L, so none of the liquid crystal patterns 61 to 64 light up (FIG. 7a).

Now, my car's speed is 80km/h and the following distance is
Let's say it's 30m. Since the safe following distance SL has become shorter than the actual following distance L, the alarm device 7 issues an alarm and the safe following distance (50m~
100m) is turned on for several seconds (FIG. 7b). The driver brakes the preceding vehicle so that it enters the illuminated liquid crystal pattern 63.

Assume that as a result of braking, the vehicle speed becomes 70 km/h and the distance between the vehicles becomes 70 m. Since the safe inter-vehicle distance SL is longer than the actual inter-vehicle distance L, the liquid crystal pattern turns off (Figure 7c).

Note that the display device is not limited to the above-mentioned embodiment, but uses linear display patterns 91 to 95 as shown in FIG. 8, and by blinking two adjacent display patterns, the area between them is may also be shown.

(Effects of the invention) As explained in detail above, according to the invention,
The display pattern on the windshield makes it easy to see the safe distance to maintain.
Drivers can instantly determine the safe following distance and avoid danger.

Furthermore, when the inter-vehicle distance becomes smaller than the safe inter-vehicle distance, the danger can be audibly notified by issuing a warning using a buzzer or the like.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the vehicle display device according to the present invention, FIG. 2 is a diagram showing a distance measuring device used in the device of the embodiment, and FIG. 3 is a diagram showing the device of the embodiment. FIG. 4 is a flowchart showing the operation of the controller, FIG. 4 is a diagram showing a map for determining the safe inter-vehicle distance from the vehicle speed stored in the controller, and FIGS. It is a figure showing an example of a liquid crystal display device used. FIG. 7 is a diagram for explaining the operation of the vehicle display device according to the present invention. FIG. 8 is a diagram showing another embodiment of the liquid crystal display used in the vehicle display device according to the present invention. 1...Distance measuring device, 2...Vehicle speed sensor, 3...
...Manual switch, 4...Controller, 5
...LCD driver, 6...Liquid crystal display, 7...
Alarm device, 8...windshield.

Claims (1)

[Scope of Claim for Utility Model Registration] A vehicle display device that displays a safe inter-vehicle distance between the own vehicle and a preceding vehicle, comprising: a distance measuring device that measures the actual inter-vehicle distance between the own vehicle and the preceding vehicle; a vehicle speed sensor that detects the traveling vehicle speed; a display device attached to a windshield and having a plurality of display areas corresponding to the inter-vehicle distance when the driver of the own vehicle looks at the preceding vehicle through the windshield; A safe following distance is calculated from the vehicle speed according to a predetermined map, and the safe following distance and the actual following distance are compared, and when the actual following distance becomes shorter than the safe following distance, the display is performed. A display device for a vehicle, comprising: a display control circuit that lights up the display area corresponding to the safe inter-vehicle distance of the vehicle.