JPH02144242A - Image receiving device for vehicle - Google Patents

Abstract

PURPOSE:To use one set of display as a plurality of image displays, and simplify constitution of the device, by switching over a plurality of image signals of a television and of a rear side monitor camera according to a rotation angle of a display, and transmitting respective signals to the display. CONSTITUTION:A liquid crystal display 1 is rotatably mounted on the ceiling or the like of an automobile, and a detecting means not shown in the figure for a rotation angle of the liquid crystal display is arranged in the vicinity of the display. Further, a signal transmitting part 2 for an image signal 3 is connected to the liquid crystal display 1, and a switchover circuit not shown in the figure is built in the signal transmitting part 2. In the switchover circuit of the signal transmitting part 2, the image signal 3 is switched to a TV image signal 6 from a tuner or VTR 5, or a image signal 8 of the backward of the vehicle from a rear side monitor camera 7, according to a rotation angle signal 4 from the detecting means of the liquid crystal display 1. Hereby, one set of the liquid crystal display 1 is used for a plurality of image displays.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to an on-vehicle image receiving device, and particularly to an image receiving device for switching between a normal preview image and an image from a rear monitoring camera installed in a vehicle. The present invention relates to an in-vehicle image receiving device that can be displayed on a single display.

(Conventional technology) With the spread of liquid crystal displays, television receivers,
At least the displays have become thinner, and as a result, in-vehicle television receivers suitable for installation in automobiles have been developed.

An example thereof is shown in FIG. In this image receiving system, the liquid crystal display 21 is housed in a case 23 fixed to the main body of the automobile, and can be raised by a hinge mechanism 22 as shown in the figure when in use. Furthermore, the screen direction can be changed by rotating the display 21 while standing up. Therefore, the hinge mechanism 22 is connected to the case 2 at @II 24 as shown in FIG.
It is rotatably attached to a hole provided in a part of 3. Conventionally, the angle Ok of display rotation has been limited to a range of about 60 degrees as shown in FIG. 7 (1), so that the driver cannot see the display screen. This is because if it is visible from the driver's seat, it may be dangerous to see it while driving.

On the other hand, cars are sometimes equipped with rear-view cameras.

This is to check the safety of the rear when the car is backing up. Therefore, the information captured by the camera must be displayed so that it can be seen by the driver. It goes without saying that for this to happen, at least a display must be installed where it can be seen from the driver's seat.

When using a conventional in-vehicle television receiver in which the display 21 is placed between the rear seat and the front seat, the screen cannot be seen from the driver's seat, so the display cannot be seen from the rear surveillance camera. Displaying information is meaningless.

Therefore, if the above-mentioned in-vehicle television receiver is installed in a car equipped with a rearview camera, a separate receiver for the rearview camera must be installed inside the vehicle.

It was a waste to install two image receivers in the car, and at the same time it was difficult to arrange two displays in the narrow car interior. On the other hand, the images and displays on the rear surveillance camera are temporary, such as in the case of locust attacks, and are rarely used for other purposes.

(Problem to be Solved by the Invention) As mentioned above, conventionally, when installing an in-vehicle television receiver, a rearview camera, and a receiver, there are two displays, and the problem is that it takes up a lot of space. There was a point.

Taking these points into consideration, the present invention is an in-vehicle device that installs a display between the front seat and the rear seat so that it can be used both for displaying images such as normal television broadcasts and for displaying images from a rear monitoring camera. The purpose of this project was to provide an image receiving device for

[Structure of the Invention] (Means for Solving the Problems) The in-vehicle image receiving device of the present invention includes a display rotatably installed in the middle between a front seat and a rear seat in a car, and a rotation angle of the display. a detection means for detecting the rotation of the display; and a signal transmission section that uses the angle detection signal from the detection means to switch between a first video signal and a second video signal according to the rotation of the display, and transmit the signals to the display. a television signal generating means for supplying a television signal as a first video signal to the signal transmitting section; and a rear monitoring camera supplying an image signal of the rear of the construction vehicle as a second video signal to the signal transmitting section. It is characterized by being equipped with.

(Function) In the present invention, the screen of the display is (12
It can be rotated from a position visible from the driver's seat to a position visible from the driver's seat, and the rotation activates the detection means. Position C, visible from the rear seat, displays images of normal television broadcasts etc. Images from the rear surveillance camera can be displayed on a display that can be seen from the seat.

Therefore, a person sitting in the rear seat can enjoy images from a television broadcast or from a video device.

On the other hand, when it is necessary to check the rear of the vehicle, such as when reversing the vehicle, the driver can switch the display screen to the image from the rear monitoring camera and use that screen to check the rear of the vehicle and safely back up the house. I can do that.

(Example) Hereinafter, the present invention will be described in detail based on the drawings.

FIG. 1 is a block diagram of an electric circuit of a vehicle-mounted image receiving apparatus according to the present invention. A WI product display 1 is rotatably attached to the automatic tendon part, and a signal 23 transmitting section 2 is connected to this liquid crystal display 1, and it receives a video signal 3 from the signal transmitting section 2 and displays an image. There is. The signal sending unit 2 has a built-in switching circuit, and the detection switch 1-
Depending on the state of the angle detection signal 4 from 9, the video signal 3 is switched to the TV video signal 6 of CH1-1 or V''r R5, or the video signal 8 of the rear of the vehicle from the rear monitoring camera 7. That is, The signal sending unit 2 switches between a video signal 6 and a video signal 8 based on the angle detection signal 4 detected according to the rotation of the liquid crystal display 1, and outputs the display 1 to the display 1.
The output is sent to .

Further, regarding the mechanical structure, a cam mechanism is provided that associates the rotation angle of the liquid crystal display 1 with the operation of a detection switch 9, which will be described later, and other than that, the conventional structure can be used as is. However, the liquid crystal display 1 of this embodiment is the same as the conventional liquid crystal display 21 described above, and is disposed in the middle between the front and rear seats of an automobile as in the conventional case.

2 to 4 are plan views showing the rotation of the liquid crystal display 1 and the operational relationship of the changeover switch 9.

In this figure, the rotary plate 10 that constitutes the cam, etc.
A detection switch 9 is disposed near the outer periphery of the rotary plate 10 and turns on and off in accordance with the rotation of the rotary plate 10 to obtain an angle detection signal 4. Furthermore, a click plate 11 for giving a click feeling when rotating the rotary plate 10 and a stopper 12 for regulating the rotation are provided near the outer circumference of the rotary plate 10. 13 has a V-shaped full C for clicking.

The rotary plate 10 has a cam structure with a cutout having the same diameter over a range of 180 degrees, and is fixed to the aforementioned shaft 24 (see FIG. 7), and rotates through 180 degrees as the liquid crystal display 1 rotates. It can be rotated. That is, it must be possible to rotate 180 degrees clockwise from the state shown in FIG. 2 to the state shown in FIG. 4.

However, the angle is not necessarily limited to 180 degrees.

In the figure, the position of the liquid crystal display 1 is indicated by a chain line. The upper side of the figure is the front of the car, and the lower side is the rear.

FIG. 2 shows the liquid crystal display 1 in a position where its screen can be seen from the rear seat, and perpendicular to the direction of travel.
1J Kubewara The screen is shown facing directly behind. In this embodiment, the rotating plate 10 and the stopper 12 prevent the liquid crystal eye spray 1 from rotating counterclockwise from the state shown in FIG.

The rotating plate 10 keeps the detection switch 9 on when the liquid crystal display 1 rotates within the range of angle 01 as shown in FIG. 0
Within the range of 2, the detection switch 9 is kept off.

The tip of the click plate 11 is inserted into the rotary plate 10 at a point rotated by an angle θ1 from the position shown in FIG.
A letter-shaped groove 13 is formed.

The click plate 11 and the V-shaped groove 13 give a click feeling when the liquid crystal display 1 rotates, giving the operator a switching feeling. Note that a click feeling can also be obtained when the rotary plate 10 comes to the position shown in FIG. 2 (rotation angle 0 degrees) and the position shown in FIG. 4 (rotation angle 180 degrees).

In the following configuration, at step a5, the signal sending section 2 receives the angle detection signal 4 taken out by the detection switch 9, and switches the video signal using the built-in switching circuit. As a result, when the detection switch 9 is on, the signal sending section 2 sends the TV video signal jV 6 to the liquid crystal display 1, and when it is off, the signal sending section 2 sends out the video signal 8 to the liquid crystal display 1. . Note that it is desirable to provide a hysteresis circuit in the signal switching section in the No. 1 sending section 2 so that the video signal can be stabilized even if the Kakomaro detection signal 8-34 fluctuates momentarily. Further, it is preferable that the signal sending section 2 includes not only a video signal switching function but also a conversion circuit for adapting the video signal of the tuner and the rear monitoring camera to the liquid crystal display 1. This conversion circuit allows the liquid crystal display main body to be made small and easy to rotate.

However, normally, the receiver for this vehicle is operated by rotating the liquid crystal display 1 within the range from the state shown in Figure 2 to 01 and keeping the display 1 in a position that is easy for the person sitting in the rear seat to see. let

Since the detection switch 9 is on in this rotation range, the signal sending unit 2 does not send the TV video signal 6 from the tuner or VTR 5 to the liquid crystal display 1. The driver cannot see both sides.

The driver confirms the rear view (sometimes by rotating the liquid crystal display 1. When the rotation angle exceeds θ1, the detection switch 9 turns off. Therefore, the video signal 8 from the rear monitoring camera 7 is sent to the liquid crystal display 1. The image taken by the rear monitoring camera 7 is automatically displayed on the screen.

In the above embodiment, a cam with a rotary plate and a detection switch in contact with the cam are used as means for detecting the rotation of the display, but the present invention is not limited to this, and various rotation detecting means may be used. Of course, it is a good thing to do.

[Effects of the Invention] As described above, the in-vehicle image receiving device of the present invention can display both an image of a television broadcast, etc. and an image from a rear monitoring camera on a single display, and furthermore, it is possible to rotate the display. This allows the screen to change automatically. Therefore, the present invention:
You can make effective use of the narrow space inside the car, and
Those in the back seat can enjoy television broadcasts on the screen, and the driver can't see it and it doesn't interfere with driving. Moreover, when the driver wants to check what's going on behind him, he can simply turn on the display. Since it only needs to be rotated, safety can be improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an electric circuit of a vehicle-mounted image receiving device according to the present invention, and FIGS. 2 to 4 are plan views illustrating the relationship between a rotary plate that rotates together with the display and a detection switch.
Fig. 5 is a perspective view of the display part of a conventional automobile television receiver, Fig. 6 is a vertical sectional view showing the structure of the hinge part of the display in Fig. 5, and Fig. 7 is a perspective view of the display part of the conventional automobile television receiver. FIG. 3 is a plan view of the rear part of the vehicle installed; 1...Liquid crystal display, 2...Tuner or VTR. 3.6.8... Video signal, 4... Angle detection signal, 7... Rear monitoring camera, 9... Detection switch, 10... Rotating plate. 1st rIA Figure 2

Claims (1)

[Scope of Claims] A display rotatably installed between a front seat and a rear seat in a vehicle interior, a detection means for detecting the rotation angle of this display, and an angle detection signal from this detection means is used. a signal sending unit that switches between a first video signal and a second video signal according to rotation of the display and sends the signal to the display; and a television signal is supplied as the first video signal to the signal sending unit. A vehicle-mounted image receiving device comprising: a television signal generating means for generating a vehicle; and a rear monitoring camera for supplying an image signal of the rear of the vehicle as a second video signal to the signal sending section.