JPH11196436A - Video signal output device, video display system and on-vehicle navigation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically switch a video signal outputted from a video signal output device in accordance with the aspect ratio of a video display device to be connected. SOLUTION: A control part 2c of a DVD reproducing device (a video signal output device) 2 inputs aspect ratio information from a video display device 1 and controls a reproduction part 2 so that it outputs the video signal corresponding to the aspect ratio. Also, the control part 2c controls the reproduction part 2a so that the video signal corresponding to the aspect ratio information stored in a memory 2b is outputted when the aspect ratio information is not inputted from the video display device 1. Thus, it is possible to be connected to the video display device that does not have a function to output the aspect ratio information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video signal output device for switching a video signal in accordance with an aspect ratio (ratio between horizontal and vertical) of a connected video display device, and a video display provided with the video signal output device. The present invention relates to a system and an in-vehicle navigation system.

[0002]

2. Description of the Related Art Conventionally, the aspect ratio of a television (TV) was 4: 3. In recent years, a wide-size television having an aspect ratio of 16: 9 has been developed and widely used. In addition, a normal-size video display device having an aspect ratio of 4: 3 has been used for an in-vehicle navigation system, but a wide-size video display device having an aspect ratio of 16: 9 has recently been used. , Which contributes to improving the visibility of the map image. The video display device of the navigation system is used not only for displaying a map image but also for displaying a video output from a video signal output device such as a TV tuner and a DVD playback device.

[0003]

Generally, in a car navigation system, a navigation device and a video display device are provided as separate units, and a user uses a desired unit in combination. Accordingly, in the navigation system, a case where a wide-size video display device having an aspect ratio of 16: 9 is connected, and a case where the aspect ratio is 4: 9.
3 normal size video display devices may be connected. The user needs to manually switch the output setting of the video signal output device depending on whether the video display device to be connected is a wide size or a normal size.

In a car navigation system, if an image from a DVD playback device or the like is displayed on a video display device while the vehicle is running, guidance information from the navigation device cannot be obtained. There is also a risk of passing by without noticing the intersection. As described above, an object of the present invention is to provide a video signal output device, a video display system, and an in-vehicle navigation system that automatically switch a video signal output from a video signal output device according to an aspect ratio of a connected video display device. It is to be.

[0005] Another object of the present invention is to display guidance information on a video display device as the vehicle travels, even when the video output from the video signal output device is displayed on the video display device. Another object of the present invention is to provide a navigation system for guiding a vehicle safely to a destination.

[0006]

The above object is achieved by a video signal output device which outputs a video signal according to an aspect ratio of a video display device to be connected. And a video signal output unit capable of outputting a second video signal, and an aspect ratio information of the video display device, and an image corresponding to the aspect ratio information among the first and second video signals And a control unit that controls the video signal output unit so as to output a signal.

An object of the present invention is to provide a video display device, a video signal output device for outputting a video signal to the video display device,
A bus line and a video signal line connecting between the video signal output device and the video display device, wherein the video signal output device has first and second aspect ratios corresponding to first and second aspect ratios; A video signal output unit capable of outputting the video signal of the first aspect and the aspect ratio information of the video display device via the bus line, and corresponding to the aspect ratio information of the first and second video signals. A control unit that controls the video signal output unit to output one of the video signals,
A video display system characterized by comprising a storage unit for storing the aspect ratio information.

The above object is achieved by providing a video display device, a plurality of video signal output devices for outputting video signals, a bus line connecting between the plurality of video signal output devices and the video display device, A video signal selection device that selects and outputs a video signal to be transmitted to the video display device among video signals output from the video signal output device, wherein each of the plurality of video signal output devices includes first and second video signal output devices. A video signal output unit capable of outputting first and second video signals corresponding to a second aspect ratio; and inputting aspect ratio information via the bus line, and outputting the first and second video signals. It is characterized by comprising a control unit that controls the video signal output unit so as to output a video signal corresponding to the aspect ratio information, and a storage unit that stores the aspect ratio information. It is solved by an image display system.

[0009] The object described above has an image display device, and an in-vehicle navigation device that generates guidance information to be displayed on the image display device, wherein the navigation device has a map data storage unit that stores map data; A vehicle position detecting unit for detecting a position of the vehicle, the guide information being generated from a vehicle position detected by the vehicle position detecting unit and map data stored in the map data storage unit, and an aspect of the image display device. A control unit for inputting ratio information and determining an aspect ratio of a video signal, and a video signal output unit for converting the guide information into a video signal having an aspect ratio determined by the control unit and outputting the video signal. To solve the problem.

An object of the present invention is to provide a video display device, an in-vehicle navigation device for generating guidance information to be displayed on the video display device, a video signal output device for outputting a video to be displayed on the video display device, and the navigation device. Device and a video signal selection device for selecting and outputting a video signal to be transmitted to the video display device among video signals output from the video signal output device, the video display device, the navigation device, and the video signal output Device and a bus line connecting between the video signal selection device,
The navigation device includes a map data storage unit that stores map data, a vehicle position detection unit that detects a vehicle position, a vehicle position detected by the vehicle position detection unit, and map data stored in the map data storage unit. A first control means for generating the guide information from the above, and determining an aspect ratio of a video signal according to the aspect ratio information input via the bus line; and determining the guide information by the first control means. And a first video signal output unit that converts the video signal into a video signal having an aspect ratio and outputs the video signal.
And a second video signal output unit capable of outputting a second video signal, and aspect ratio information input via the bus line, and the aspect ratio information corresponding to the aspect ratio information among the first and second video signals. A second control unit for controlling the second video signal output unit so as to output the other video signal, and a storage unit for storing the aspect ratio information. To solve.

The operation of the present invention will be described below. In the present invention, aspect ratio information can be transmitted and received between a video display device and a video signal output device such as a navigation device or a DVD playback device. The control unit of the signal output device controls the video signal output unit so as to output a video signal corresponding to the aspect ratio information. This allows
This eliminates the need for the user to manually set the aspect ratio.

In this case, it is preferable to provide a storage unit for storing the aspect ratio, and store the aspect ratio information indicating a specific aspect ratio in the storage unit as an initial value. Accordingly, even when aspect ratio information is not output from the video display device, the video display device of the present invention outputs a video signal corresponding to the aspect ratio stored in the storage unit. Therefore, the video signal output device of the present invention can be connected to a video display device having no function of outputting aspect ratio information.

A video display device, a plurality of video signal output devices, and a video signal selection device are connected to a bus line (common signal line).
In the case of a video display system having a function of transmitting and receiving various signals between devices via the bus line, aspect ratio information is output to the bus line by the video display device. When aspect ratio information of a video display device is input to each video signal output device via a bus line, the control unit of each video signal output device outputs a video signal so as to output a video signal corresponding to the aspect ratio information. Control the output section. Thus, the aspect ratio information is transmitted to each video signal output device at the same time, so that the process for transmitting the aspect ratio information to each video signal output device is facilitated.

In the case of an in-vehicle navigation system, it is not necessary to always display the video from the navigation device on the video display device, but it is sufficient to display it only when necessary, such as when changing course. Therefore, in the in-vehicle navigation system of the present invention, a video output from a video signal output device such as a DVD playback device is normally displayed on a video display device, and a priority display request signal is output from the navigation device via a bus line. Only when this occurs, an image based on the image signal from the navigation device is displayed on the image display device. Thus, even when the video from the video signal output device is being displayed on the video display device, guidance information from the navigation device can be obtained as appropriate, and problems such as making a wrong route can be avoided.

When the video display device is of a wide size (aspect ratio is 16: 9), images from the video signal output device and the navigation device are combined by a two-screen generation circuit and the images from each device are displayed simultaneously. Even if it does so, visibility will hardly fall. On the other hand, when the video display device has a normal size (aspect ratio is 4: 3), the visibility is reduced when the video signals from the video signal output device and the navigation device are combined to form a two-screen configuration. For this reason, when the video display device has a normal size, it is preferable to display the video from the navigation device on the entire surface of the video display device when the priority display request signal is output from the navigation device.

[0016]

Embodiments of the present invention will be described below with reference to the accompanying drawings. (First Embodiment) FIG. 1 is a block diagram showing a video display system according to a first embodiment of the present invention.

1 is a wide-size image display device,
It has at least one video signal input terminal 1a and an aspect ratio information output terminal 1b for outputting aspect ratio information indicating a screen aspect ratio (4: 3 or 16: 9). Reference numeral 2 denotes a DVD playback device, which is a playback unit (video signal output unit) 2 that plays back a video signal recorded on a DVD video disk (hereinafter, simply referred to as a “DVD disk”).
a, a nonvolatile memory 2b, a control unit 2c, a video signal output terminal 2d, and an aspect ratio information input terminal 2e. The control unit 2c stores the aspect ratio information output from the video display device 1 in the memory 2b,
The reproducing unit 2a is controlled so as to output a video signal corresponding to the aspect ratio information stored in the reproduction unit 2b. Note that the memory 2
In a, information indicating an aspect ratio of 4: 3 is stored as an initial value of the aspect ratio information.

Video signal output terminal 2d of DVD playback device 2
Is connected to a video signal input terminal 1a of the video display device 1 by a cable 3a, and an aspect ratio information input terminal 2e is connected to an aspect ratio information output terminal 1b of the video display device 1 via a cable 3b. FIG. 2 shows a DVD player 2
6 is a flowchart showing the operation of the embodiment. First, step S
In 1, when the power of the DVD playback device 2 is turned on,
The control unit 2c checks whether or not aspect ratio information has been sent from the video display device 1. If the aspect ratio information has been sent (in the case of YES), the process shifts from step S1 to step S2, stores the aspect ratio information in the memory 2b, and shifts to step S3. On the other hand, when the aspect ratio information is not sent from the video display device 1 (NO
), The process directly proceeds from step S1 to step S3.

In step S3, the DVD reproducing device 2
When a DVD disk is loaded in the DVD player, the playback unit 2a
Read the signal from the disk. The control unit 2c includes the reproduction unit 2
Based on the signal read out in a, it is determined whether the video signal recorded on the DVD disk is only a normal size video signal or a wide size video signal is also recorded.

If the DVD disk records only the normal size video signal (YES), the process proceeds to step S5, and the control unit 2b operates the normal unit irrespective of the aspect ratio information stored in the memory 2c. The reproducing unit 2a is controlled to reproduce the size video signal. As a result, the reproducing unit 2a reproduces the normal size video signal from the DVD disk and outputs it to the video display device 1. Then, a normal size video is displayed on the screen of the video display device 1 based on the video signal output from the DVD playback device 2. Note that the video display device 1 may convert a normal size video signal to a wide size and display it on a screen.

On the other hand, if a wide-size video signal is recorded on the DVD disc in step S3 (N
In the case of O), the process proceeds to step S4, and the control unit 2c reads out the aspect ratio information stored in the memory 2b. If the aspect ratio information indicates the normal size (4: 3) (YES), the process proceeds to step S5, and the control unit 2c controls the reproduction unit 2a to reproduce the normal size video signal. Thereby, the reproduction unit 2
a reproduces a normal size video signal from a DVD disk and outputs it to the video display device 1. Then, on the screen of the video display device 1, a normal size video is displayed based on the video signal input from the video signal input terminal 1a.

In step S4, the aspect ratio information stored in the memory 2a is the wide size (16: 9).
If it indicates (NO), step S6
The control section 2c controls the reproducing section 2a to reproduce the wide-size video signal. As a result, the reproducing unit 2 a reproduces the wide-size video signal from the DVD disk and outputs it to the video display device 1. Then, on the screen of the video display device 1, a wide-size video is displayed based on the video signal input from the video signal input terminal 1a.

In the present embodiment, as described above, D
The VD playback device 2 outputs one of a normal size video signal and a wide size video signal according to the aspect ratio information output from the video display device 1.
An image of a size corresponding to the aspect ratio of the image display device 1 is displayed. In this case, the user does not need to manually switch the video output of the DVD playback device 2, and the usability is greatly improved.

In this embodiment, when the aspect ratio information is not sent from the video display device 1, a normal size video signal is output according to the initial value of the aspect ratio information stored in the memory 2b. Therefore, a conventional normal-size video display device that does not output aspect ratio information can be used. In order to support a wide-size video display device that does not have a function of outputting aspect ratio information, it is preferable that the video signal of the DVD playback device can be manually switched.

(Second Embodiment) FIG. 3 shows a second embodiment of the present invention.
FIG. 2 is a block diagram showing an on-vehicle navigation system according to the embodiment. The in-vehicle navigation system includes a head unit 10, a DVD playback device 20, a navigation device 30, and a video display device 40. As the video display device 40, a wide-size or normal-size display device is connected. The head unit 10, DVD playback device 20, navigation device 30, and video display device 40 are all connected to a bus line 6, and various signals are transmitted and received between the devices via the bus line 6.

The head unit 10 is connected to the DVD reproducing device 20 via a video signal line 7a.
It is connected to the navigation device 30 by the video signal line 7b. The head unit 10 and the video display device 40 are connected by a video signal line 7c.
The head unit 10 includes a video changeover switch 11, a two-screen generation circuit 12, a control unit 13, two video signal input terminals 14, 15, and one video signal output terminal 16. The changeover switch 11 has three changeover terminals a,
b, c and one common terminal d.
Is connected to the output terminal 16. The switching terminal a is connected to the video signal input terminal 14, the switching terminal b is connected to the video signal input terminal 15, and the switching terminal c is
Connected to the output end of the One input terminal of the two-screen generation circuit 12 is connected to the video signal input terminal 14, and the other input terminal is connected to the video signal input terminal 15.
The switching operation of the video switch 11 is controlled by the control unit 13. The two-screen generation circuit 12 has input terminals 14, 1
From the two video signals input from 5, a video signal is synthesized and output so that two videos are arranged side by side.

The DVD reproducing apparatus 20 includes a reproducing section 21 for reproducing a video signal recorded on a DVD disk, a nonvolatile memory 23 for storing aspect ratio information, and a control section 22.
It is composed of The control unit 22 controls the reproducing unit 21 according to the aspect ratio information stored in the memory 23, and the reproducing unit 21 reproduces one of the wide-size video signal and the normal-size video signal.

The navigation device 30 includes a map data storage unit 31 storing map data and a GPS (Global Pos
itioning System) A vehicle position detector 32 configured by a receiver, a gyro, and the like to detect the position of the vehicle, and traffic information to receive traffic information transmitted from outside the vehicle via an FM broadcast, an optical beacon, or a radio beacon. Receiver 33
And a video signal output unit 34 for generating and outputting video signals such as a map image and a vehicle position mark, a control unit 35, and a memory 36. The control unit 34 controls the video signal output unit 34 based on data output from the map data storage unit 31, the vehicle position detection unit 32, and the traffic information reception unit 33.
To output a map image around the current position of the vehicle, search for the optimal route from the set departure point to the destination as a guidance route, and output various types of guidance information along the guidance route. . The control unit 35 controls the video signal output unit 34 to output a video signal corresponding to the aspect ratio information stored in the memory 36.

Head unit 10, DVD playback device 2
0, the signals transmitted and received between the navigation device 30 and the video display device 40 include a status request signal, a status signal, and a command signal. The status request signal is a signal for inquiring of another device about the status (function or operation state of the device).
The status signal is a signal output in response to the status request signal, and includes information indicating the status of the device. The command signal is a signal for giving an instruction to another device. Head unit 10, DVD playback device 20, navigation device 30, and video display device 4
0 has a unique address, and a destination address and a source address are added to these signals.

FIG. 4 is a schematic diagram showing a frame configuration of a signal transmitted and received between these devices. The signal transmitted and received between the devices is, for example, a signal that constitutes one frame with 10 bytes. The destination address is added to the first byte, the source address is added to the second byte, and the data after the third byte is added. Determines the type and content of the signal. Figure 5 is a DVD
FIG. 14 is a diagram showing an example of a status signal output from the playback device 20. Here, 10 in the first byte indicates the address of the head unit 10 and 20 in the second byte indicates the address of the DVD playback device 20. When the third byte is "normal", it corresponds to only the normal size, and when it is "wide", it indicates that it corresponds to the wide size. Also, 4
If the byte is "normal", it indicates that the video output is set for normal size, and if it is "wide", it indicates that the video output is set for wide size.
The fifth byte indicates a reproduction state, and indicates whether reproduction is being performed or stopped.

The operation of the navigation system having the above configuration will be described below. Here, the image display device 4
It is assumed that a wide-size video display device is connected to 0. The head unit 10 outputs, for example, a status request signal to each device connected to the bus line 6 in the order of addresses, for example, by turning on the power. Upon receiving the status request signal, each device outputs a status signal indicating the function and status of the device. The status signal output from the video display device 40 includes aspect ratio information indicating the aspect ratio of the screen, and the head unit 10, the DVD playback device 20, and the navigation device 30 use the video display device 40 according to the aspect ratio information. Recognize the screen size of Then, the DVD device 20 and the navigation device 30 store the aspect ratio information indicating the output of the wide-size video signal in the memories 23 and 36.

The head unit 10 receives the status signals output from the DVD playback device 20 and the navigation device 30 and outputs the status of the DVD playback device 20 and the navigation device 30, for example, the DVD playback device 2.
0 and whether or not the navigation device 30 can output both the wide-size video signal and the normal-size video signal.

In the present embodiment, a status signal including aspect ratio information is output from the video display device 40 in response to a status request signal from the head unit 10, and the DVD playback device 20 and the navigation device 30 output the status signal. The type of video signal (wide-size video signal or normal-size video signal) is set. This eliminates the need for the user to manually switch the video signal of each device according to the aspect ratio of the video display device 40, greatly improving the usability.

Further, since information indicating an aspect ratio of 4: 3 is stored as an initial value of the aspect ratio information in each of the memories 23 and 36 of the DVD reproducing device 20 and the navigation device 30, it corresponds to the bus line connection. In the case of a video display device that does not have a normal size, a normal size video signal is output. This makes it possible to connect a video display device that does not support bus line connection. Note that, in order to enable connection of a wide-size video display device that does not support bus line connection, a command signal from the head unit 10 or by setting the DVD playback device 20 and the navigation device 30 individually, DVD
The video output of the playback device 20 and the navigation device 30 may be manually switched.

The operation of the above navigation system when the vehicle moves will be described separately for a case where a wide-size video display device is connected and a case where a normal-size video display device is connected. 6 and 8 are flowcharts showing the operation of the above-described navigation system. FIG. 7 and FIG. 9 are schematic diagrams showing a state in which the display is switched by running of the vehicle. 7 and 9 indicate a guidance route, and it is assumed that the vehicle is moving along the guidance route according to the guidance information of the navigation device.

First, when the power is turned on, the head unit 10 sequentially outputs a status request signal to each device. Then, the screen size of the video display device 40 is recognized based on the status signal output from the video display device 40, and when the video display device 40 is in the wide size, FIG.
The flow shown in FIG. 8 is executed, and when the normal size or the status signal from the video display device is not received, the flow shown in FIG. 8 is executed.

(Operation at Connection of Wide Size Video Display Device) In the flowchart shown in FIG. 6, when the vehicle is running, the head unit 10
The operation state of the DVD playback device 20 and the navigation device 30 is recognized based on the status signal output from the navigation device 30. If only one of the navigation device 30 and the DVD playback device 20 is operating in step S11, the process proceeds to step S12.
The head unit 10 transmits the video signal from the operating device to the video display device 40. That is, when the navigation device 30 is stopped and the DVD playback device 20 is operating, the control unit 13 of the head unit 10 sets the changeover switch 11 to the position of the contact point a. Also,
When the navigation device 30 is operating and the DVD playback device 20 is stopped, the control unit 13 of the head amplifier 10 sets the switch 11 to the position of the contact b. Thus, the video display device 40 displays either the video output from the DVD playback device 20 or the video output from the navigation device 30. Then, the process returns to step S11.

In step S11, when both the DVD reproducing device 20 and the navigation device 30 are operating (N
In the case of O), the process proceeds to step S13. Step S
In 13, the navigation device 30 checks the presence or absence of guidance information to be displayed on the video display device 40, and if there is guidance information to be displayed, shifts to step S15 and outputs a priority display request signal to the bus line 6, If there is no guidance information to be displayed, the process proceeds from step S13 to step S14.

When the priority display request signal is not output from the navigation device 30, the control unit 13 of the head unit 10 switches the switch 11 to the contact a in step S14.
And the signal from the DVD playback device 20 is transmitted to the video display device 40. As a result, the video output from the DVD playback device 20 is displayed in a wide size on the video display device 40 (see FIG. 7). Then, step S
Returning to step 11, the above process is repeated.

On the other hand, in step S13, when there is guidance information to be displayed on the navigation device 30, for example, when the vehicle is guided along a guidance route to the destination, the intersection at which the vehicle should change its course Is within a certain range (for example, within a range from 300 m before the intersection to 50 m after the intersection), the process proceeds from step S13 to step S15, and the control unit 35 displays the priority on the bus line 6 Output a request signal.

Then, the process shifts to step S16 where the control unit 13 of the head unit 10 controls the navigation device 30
Receiving the priority display request signal from the
0 and the navigation device 30 are output with aspect ratio information for setting the video aspect ratio to 4: 3. Thereby, the control unit 22 of the DVD playback device 20 switches the video signal output from the playback unit 21 to the normal size video signal, and the control unit 35 of the navigation device 35 converts the video signal output from the video signal output unit 34 Switch to video signal for normal size. The control unit 13 of the head unit 10 switches the changeover switch 11 to the position of the contact point c.
Thus, the video signal output from the DVD playback device 20 by the two-screen generation circuit 12 and the navigation device 30
Are synthesized with the video signal (map) output from, and a video in which two screens are arranged on the left and right is displayed on the video display device 40 (see FIG. 7). After that, the process returns to step S11, and the above processing is repeated. Then, the control unit 35 of the navigation device 30 cancels the priority display request signal in step S13 when the vehicle has left the intersection by 50 m or more after passing the intersection. Thereby, step S
From 13, the process proceeds to step S <b> 14, and the video display device 40 displays the wide-size video output from the DVD playback device 20 (see FIG. 7).

In the present embodiment, the video display device 4
When 0 is a wide size, a wide size image normally output from the DVD playback device 20 is displayed on the video display device 40, and when guidance information to be displayed on the navigation device 30 is generated, the DVD playback device 20 and the navigation device are displayed. The normal-size video signal output from 30 is synthesized by the two-screen generating circuit 12, and the two screens are displayed side by side. As a result, the DVD is displayed on the video display device 40.
Even when the image of the playback device 20 is displayed, the image of the navigation device is displayed on the image display device 40 when necessary, such as when changing the course, so that the vehicle can reach the destination without making a mistake in the course. I can guide you.

FIG. 8 is a flowchart showing a case where a normal-size video display device having an aspect ratio of 4: 3 is connected as a video display device. In the flowchart shown in FIG. 8, when the vehicle is running, the head unit 10 includes the DVD playback device 20 and the navigation device 3.
The operation state of the DVD playback device 20 and the navigation device 30 is recognized based on the status signal output from 0. In step S21, the navigation device 30
When only one of the DVD reproducing device 20 and the DVD reproducing device 20 is operating, the process proceeds to step S22, and the head unit 10 transmits a video signal from the operating device to the video display device 40. That is, when the navigation device 30 is stopped and the DVD playback device 20 is operating, the control unit 13 of the head unit 10 sets the changeover switch 11 to the position of the contact point a. When the navigation device 30 is operating and the DVD reproducing device 20 is stopped, the control unit 13 of the head amplifier 10 sets the switch 11 to the position of the contact b. As a result, the video display device 40
Either the video output from the VD playback device 20 or the video output from the navigation device 30 is displayed. Thereafter, the process returns to step S21.

In step S21, when both the DVD playback device 20 and the navigation device 30 are operating (N
In the case of O), the process proceeds to step S23. Step S
At 23, the navigation device 30 checks the presence or absence of guidance information to be displayed on the video display device 40, and if there is guidance information to be displayed, shifts to step S25 and outputs a priority display request signal to the bus line 6, If there is no guidance information to be displayed, the process moves from step S23 to step S24.

When the priority display request signal is not output from the navigation device 30, the control unit 13 of the head unit 10 switches the switch 11 to the contact a in step S24.
And the signal from the DVD playback device 20 is transmitted to the video display device 40. Thus, the video output from the DVD playback device 20 is displayed in the normal size on the video display device 40 (see FIG. 9). Thereafter, the process returns to step S21, and the above-described processing is repeated.

On the other hand, in step S23, when there is guidance information to be displayed on the navigation device 30, for example, when the vehicle is guided along a guidance route to the destination, the intersection at which the vehicle should change course is Is within a certain range (for example, within a range from 300 m before the intersection to 50 m after the intersection), the process proceeds from step S23 to step S25, and the control unit 35 displays the priority on the bus line 6 Output a request signal.

Then, the process shifts to step S26, where the control unit 13 of the head unit 10 controls the navigation device 30
Receiving the priority display request signal from the
A command signal for instructing a temporary stop to 0 is output. The control unit 13 of the head unit 10 switches the switch 11 to the position of the contact b. Thereby, the video display device 4
At 0, a normal-size video (map) output from the navigation device 30 is displayed (see FIG. 9). Thereafter, the process returns to step S21, and the above-described processing is repeated.

After the vehicle has passed the intersection, the control unit 35 of the navigation device 30 sets 50 m from the intersection.
If it is separated, the priority display request signal is released in step S23. As a result, the process moves from step S23 to step S24, and the control unit 13 of the head unit 10
Outputs a command signal for instructing the DVD playback device 20 to release the pause, and switches the switch 11 to the position of the contact a. As a result, the video display device 40
The normal size video output from the VD playback device 20 is displayed (see FIG. 9).

In the present embodiment, the video display device 4
If 0 is a normal size, the DVD player 20
Normal size video output from the video display device 4
0, and when guidance information to be displayed on the navigation device 30 is generated, the normal size guidance information output from the navigation device 30 is displayed on the video display device 40.
To be displayed. Thus, even when the image of the DVD playback device 20 is displayed on the image display device 40, the image of the navigation device is displayed on the image display device 40 when necessary, such as when changing the course, The vehicle can be guided to the destination without mistake.

In the above example, a case has been described in which the video output to the video display device 40 is switched when approaching an intersection where the course should be changed. However, the traffic information receiving unit 33 displays accident information or traffic regulation information. Also in the case of receiving, the video from the navigation device 30 may be preferentially displayed. In the above embodiment, the changeover switch 1
Although the case has been described where the one and two screen generation circuits 12 are provided in the head unit 10, these circuits may be built in the video display device 40.

[0051]

As described above, according to the video signal output device of the present invention, the video signal is output so that the video signal corresponding to the video data is output from the video display device. Since it controls the signal output section,
This eliminates the need for the user to manually set the aspect ratio, greatly improving the usability.

A video display system having a function of connecting a video display device, a plurality of video signal output devices, and a video signal selection device with a bus line and transmitting / receiving signals between the devices via the bus line. In this case, if the video display device outputs the aspect ratio information to the bus line, and each video signal output device receives the aspect ratio information from the bus line, it is necessary to output the aspect ratio information to each video signal output device individually. Therefore, processing for transmitting aspect ratio information to each video signal output device is facilitated.

In the car navigation system according to the present invention, usually, the image based on the video signal output from the video signal output device is preferentially displayed on the video display device, and the priority display request signal is output from the navigation device. Only the video based on the video signal from the navigation device is preferentially displayed on the video display device. Thereby, even when the video from the video signal output device is displayed on the video display device, guidance information by the navigation device is provided as appropriate, and problems such as making a mistake in the road are avoided.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a video display system according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing an operation of the DVD reproducing device.

FIG. 3 is a block diagram illustrating a vehicle-mounted navigation system according to a second embodiment of the present invention.

FIG. 4 is a schematic diagram illustrating a frame configuration of a signal transmitted and received via a bus line.

FIG. 5 is a diagram illustrating an example of a status signal output from a DVD playback device.

FIG. 6 is a flowchart showing the operation of the navigation system of the present invention, and is a flowchart when the screen size of the video display device is a wide size.

FIG. 7 is a diagram illustrating a state in which an image changes due to movement of a vehicle when a screen size of the image display device is a wide size.

FIG. 8 is a flowchart showing the operation of the navigation system of the present invention, and is a flowchart when the screen size of the video display device is a normal size.

FIG. 9 is a diagram illustrating a state in which an image changes due to movement of a vehicle when a screen size of the image display device is a normal size.

[Explanation of symbols]

 1, 40 video display device, 1a, 14, 15 video signal input terminal, 1b aspect ratio information output terminal, 2, 20 DVD playback device, 2a, 21 playback unit, 2b, 23, 36 memory, 2c, 13, 22, 35 control unit, 2d. Reference Signs List 16 video signal output device, 2e aspect ratio information input terminal, 3a, 3b cable, 6 bus line, 7a, 7b, 7c video signal line, 10 head unit, 11 video changeover switch, 12 two screen generation circuit, 30 navigation device, 31 map data storage unit, 32 vehicle position detection unit, 33 traffic information reception unit, 34 video signal output unit.

Claims (11)

[Claims] 1. A video signal output device for outputting a video signal according to an aspect ratio of a connected video display device, capable of outputting first and second video signals corresponding to first and second aspect ratios. A video signal output unit, and inputting the aspect ratio information of the video display device, and outputting the video signal corresponding to the aspect ratio information among the first and second video signals. A video signal output device comprising: a control unit that controls an output unit. 2. A storage unit for storing the aspect ratio information, wherein the storage unit stores aspect ratio information indicating one of the first and second aspect ratios as an initial value. 2. The video signal output device according to claim 1, wherein: 3. A video display device, a video signal output device for outputting a video signal to the video display device, and a bus line and a video signal line connecting between the video signal output device and the video display device. A video signal output unit capable of outputting first and second video signals corresponding to first and second aspect ratios; and a video signal output unit configured to output the video signal via the bus line. A control unit that receives aspect ratio information and controls the video signal output unit to output a video signal corresponding to the aspect ratio information among the first and second video signals; A video display system comprising a storage unit for storing information. 4. A video display device, a plurality of video signal output devices for outputting video signals, a bus line connecting between the plurality of video signal output devices and the video display device, and the plurality of video signal outputs A video signal selection device that selects and outputs a video signal to be transmitted to the video display device from video signals output from the device, wherein each of the plurality of video signal output devices is a first and a second video signal output device.
A video signal output unit capable of outputting first and second video signals corresponding to the aspect ratio of the video signal; inputting aspect ratio information via the bus line; A video display system comprising: a control unit that controls the video signal output unit so as to output a video signal corresponding to the ratio information; and a storage unit that stores the aspect ratio information. 5. The storage unit stores, as an initial value, aspect ratio information indicating one of the first and second aspect ratios, and the control unit controls the aspect ratio via the bus line. Controlling the video signal output unit to output a video signal corresponding to aspect ratio information stored in the storage unit among the first and second video signals when information is not input; The video display system according to claim 3, wherein: 6. The video signal selection device according to claim 4, wherein the video signal selection device includes a video signal synthesis unit that synthesizes and outputs two or more video signals output from the plurality of video signal output devices. Video display system. 7. An image display device, comprising: a vehicle-mounted navigation device that generates guidance information to be displayed on the image display device; the navigation device includes a map data storage unit that stores map data, and a position of the vehicle. And the vehicle position detection unit for detecting the vehicle position detected by the vehicle position detection unit and the map data stored in the map data storage unit to generate the guidance information, and the aspect ratio information of the video display device A vehicle comprising: a control unit that determines an aspect ratio of a video signal by inputting the video signal; and a video signal output unit that converts the guide information into a video signal having an aspect ratio determined by the control unit and outputs the video signal. Navigation system. 8. An image display device, an in-vehicle navigation device that generates guidance information to be displayed on the image display device, an image signal output device that outputs an image to be displayed on the image display device, the navigation device, and the navigation device. A video signal selection device that selects and outputs a video signal to be transmitted to the video display device among video signals output from the video signal output device, the video display device, the navigation device, the video signal output device, and A bus line that connects between the video signal selection devices, the navigation device includes a map data storage unit that stores map data, a vehicle position detection unit that detects a position of the vehicle, and the vehicle position detection unit. Generating the guide information from the detected vehicle position and the map data stored in the map data storage unit; First control means for determining an aspect ratio of a video signal in accordance with aspect ratio information input via the interface, and converting the guide information into a video signal having an aspect ratio determined by the first control means and outputting the video signal. A first video signal output unit, wherein the video signal output device is capable of outputting first and second video signals corresponding to first and second aspect ratios; Inputting aspect ratio information through the bus line,
And a second control unit for controlling the second video signal output unit so as to output a video signal corresponding to the aspect ratio information among the second video signals, and a storage for storing the aspect ratio information And an on-vehicle navigation system. 9. The first control unit outputs a priority display request signal to the bus line when it is necessary to display the guide information on the video display device. The in-vehicle navigation system according to claim 8, wherein, when the priority display request signal is received via a bus line, the video signal output from the navigation device is transmitted to the video display device with priority. 10. The video signal selection device includes a two-screen generation circuit that combines and outputs a video signal from the navigation device and a video signal from the video signal output device, and includes an aspect of the video display device. The in-vehicle navigation system according to claim 9, wherein when the ratio is 16: 9, when the priority display request signal is received, the output of the two-screen generation circuit is output to the video display device. 11. The video signal selecting device, when receiving the priority display request signal when the aspect ratio of the video display device is 4: 3, sends only the video signal from the navigation device to the video display device. 10. The in-vehicle navigation system according to claim 9, wherein when the priority display request signal is released, only the video signal from the video signal output device is transmitted to the video display device.