JPH0937189A - On-vehicle display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform video display at all times regardless of the traveling/ stoppage states of a vehicle when it is discriminated that video images to be projected to a display element are the video images for a navigation system by discriminating TV video images and the video images of a general video or the like and the video images for the navigation system while firmly maintaining traveling safety measures. SOLUTION: An AV composite plug for providing the video images of the general video or the like is inserted to the insertion hole 41 of an AV composite jack 21 and the AV composite plug for providing the video images for the navigation is inserted to the insertion hole 42 of the AV composite jack 22. Also, for the plugs inserted to the AV composite jacks 21 and 22, the arrays of a terminal for the video images and the terminals for audio are made respectively reverse. Then, a switch S1 is connected to a video switch 5 and the switch S2 is connected to an audio switch 9. Further, television video signals VTV are inputted to the video switch 5, television audio signals ATV are inputted to the audio switch 9 and they are respectively controlled by a control circuit 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted display device, and more particularly to a vehicle-mounted display device which has an external video signal input terminal and can be used as a monitor for navigation by using the external video signal input terminal. .

[0002]

2. Description of the Related Art Since 1971, various measures such as the introduction of a wide area traffic control system using computers, which has been deployed nationwide, has been able to suppress traffic congestion and accidents, which had been one of the increasing numbers until then. However, it has recently turned to an increasing trend again, and it seems that the traffic situation in the city has already exceeded the practical limit only by conventional measures.

[0003] On the other hand, it has become possible to start driving a car while having fun, and also to carry out work as an even more moving office, rather than just a conventional means of transportation. One example of the fact that automobiles have become more than just a means of transportation is that the number of vehicles equipped with AV equipment has increased in recent years. This is due to the recent development of electronics,
It seems that the development of color liquid crystal technology is particularly important. Conventionally, audio equipment has been installed inside the vehicle, but the number of vehicles equipped with visual equipment has been extremely small.

With the increase in the number of vehicles equipped with AV equipment in the vehicle, a basic automobile that displays a map and the current position of the vehicle on a video display device of the AV equipment mounted near the driver's seat of the vehicle. Navigation systems have come into widespread use, and they have already been installed as standard (or optional) in flagship cars of automobile manufacturers.

Next, an example of a conventional vehicle-mounted display device generally called an AV device will be described. FIG. 7 is a block diagram showing a configuration example of a conventional vehicle-mounted display device.

As shown in FIG. 7, the conventional vehicle-mounted display device has an antenna 1 for receiving a television signal and a desired broadcasting station selected from the television signals to select an intermediate frequency signal (video carrier: 58.75 MHz). And voice carrier: 54.25MHz)
A tuner 2 that outputs a signal, a PIF circuit 4 that amplifies and detects a video intermediate frequency signal, a color video signal (video signal) from the PIF circuit 4, or a video signal from an external video signal input terminal 13. Video switch 5 to select and output one, and color video signal (video signal)
Video demodulation circuit 6 that performs YC separation and color signal reproduction, etc.
A display element 7 for displaying a color image on the screen, an SIF circuit 8 for amplifying and detecting an audio intermediate frequency signal, an SI
An audio switch 9 for selecting and outputting either an audio signal from the F circuit 8 or an audio signal from the external video signal input terminal 13, and an amplifier circuit 10 for amplifying the audio signal.
And a speaker 11 for converting the amplified audio signal into sound
And a traveling detection circuit 12 for determining whether or not the vehicle is traveling.
And a control circuit 3 for controlling the tuner 2, the video switch 5 and the audio switch 9.

Next, the operation of the conventional vehicle-mounted display device constructed as described above will be described.

A television signal received by the antenna 1 is tuned to a desired broadcasting station by a tuner 2 controlled by a control circuit 3 and supplied to a PIF circuit 4 as a PIF signal (intermediate frequency signal). The PIF circuit 4 amplifies and detects the input PIF signal, and outputs a video signal to the video switch 5 and an SIF signal (audio intermediate frequency signal) to the SIF circuit 8. Also, SIF
The circuit 8 amplifies and detects the SIF signal input from the PIF circuit 4, and outputs an audio signal to the audio switch 9.

On the other hand, the control circuit 3 controls the video switch 5 and the audio switch 9 to control the video signal and the audio signal from the external video signal input terminal 13, or the video signal and the SIF circuit from the PIF circuit 4. A desired video source and audio source of any of the audio signals from 8 are selected, and the selected video signal is subjected to YC separation and color signal reproduction by the video demodulation circuit 6 and then displayed on the screen of the display element 7. An image is displayed, the selected audio signal is signal-amplified by the amplifier circuit 10, and is output as sound from the speaker 11.

Further, the traveling detection circuit 12 for detecting the stop or traveling state of the vehicle on the basis of information from a parking brake, a vibration sensor or the like (not shown) notifies the control circuit 3 of the detection result. There is. Then, based on the information, the control circuit 3 controls the video switch 5 while the vehicle is traveling, for example, so that the flow of the video signal to the display element 7 is cut off and the image display is not performed. Incidentally, in order to prohibit the image display, the power of the entire device except the control circuit 3 may be turned off. That is, by operating as described above, control is performed so that the driving safety of the driver is not hindered.

By the way, as means for inputting an external video signal to the external video signal input terminal 13 provided in the vehicle-mounted television receiver as described above, a stereo audio plug and jack used for audio are provided. In many cases, those having a similar structure are used.

FIG. 8 is a diagram showing an example of a simple and space-saving AV plug and jack that satisfies such requirements.

As a means for inputting an external video signal to the external video signal input terminal 13 provided in the in-vehicle television receiver, the structure of wiring is simple in view of being mounted on the vehicle, and it is possible to save the cost. Space, etc. are required. Therefore, as a correspondence to such an AV input terminal, an AV composite plug 28 or an AV as shown in FIG.
A cord 29 with a composite plug is used, for example, A
The V composite plug 28 includes a GND terminal 35 and a video terminal 3
6, and the audio terminal 37.
In the cord with an AV composite plug, since a video signal having a high frequency component flows on the video signal side, the impedance of the cord is 75Ω so that the signal does not deteriorate.
It is set to and is distinguished from the one for voice.

FIG. 8B shows the AV composite plug 2 described above.
8 is a cross-sectional view showing an AV composite jack 27 which is a receiving side of 8, and the GND terminal 35 and the GND contact 3 by inserting the AV composite plug 28 from the insertion port 44.
8, the video terminal 36 and the video contact 39, and the audio terminal 37 and the audio contact 40 are in contact with each other.

By the way, in the so-called in-vehicle general-purpose television receiver having the conventional external video signal input terminal configured as described above, the vehicle traveling state is taken into consideration in consideration of safe driving such as inattentive driving prevention. In, the control is performed so that the image is not displayed on the display element 7.
Therefore, for example, when the vehicle-mounted general-purpose television receiver is used as a monitor for navigation, that is, when the vehicle-mounted general-purpose television receiver is used for a navigation system via an external video signal input terminal provided in the vehicle-mounted general-purpose television receiver. When the video and audio information is output to the in-vehicle general-purpose television receiver to be displayed on the display element 7, the image is displayed on the screen of the in-vehicle general-purpose television receiver in the vehicle traveling state as described above. Since the control is performed so that the display is not performed, navigation /
The display element 7 of the in-vehicle general-purpose television receiver as a monitor for the system does not display the information of the image (the current position of the vehicle equipped with the navigation system, the map for indicating the position, etc.). . Therefore,
There is a problem that it is impossible to use the conventional vehicle-mounted general-purpose television receiver as a monitor for a navigation system while the vehicle is running.

[0016]

As described above, it is not possible to use the conventional vehicle-mounted general-purpose television receiver, that is, the conventional vehicle-mounted display device as a monitor for a navigation system while the vehicle is running. There was a problem (defect) that it was possible.

Therefore, in order to eliminate such a problem, the present invention discriminates an image such as a TV image or a general video from an image for a navigation system while firmly adhering to the conventional driving safety measures, and a display element. Provided is a vehicle-mounted display device that always displays an image regardless of whether the vehicle is in a running or stopped state when it is determined that the image that is about to be displayed in is a navigation system image. That is the purpose.

[0018]

According to a first aspect of the present invention, there is provided an on-vehicle display device which is mounted on a vehicle or the like and which outputs and outputs various video sources based on a user's request. , A first AV composite signal supplying means for supplying a video signal and an audio signal from a general AV source, and a first AV composite inputting the video signal and the audio signal from the first AV composite signal supplying means. A second AV composite signal for supplying the signal input means and the video signal and the audio signal from the navigation system by the AV composite signal supply means having a terminal arrangement different from that of the first AV composite signal supply means. Supply means and the second AV
Second AV composite signal input means for inputting the video signal and audio signal from the composite signal supply means, the video signal input from the first AV composite signal input means, and the second AV composite signal input means First AV composite signal selecting means for selecting any one of the video signals input from the audio signal, the audio signal input from the first AV composite signal input means, and the second AV composite signal input means. Second AV composite signal selection means for selecting one of the audio signals input from the device, video display means for displaying the video signal, audio output means for outputting the audio signal, and the vehicle being stopped. Vehicle running detection means for detecting whether the vehicle is running or running,
When the traveling state of the vehicle is detected by the vehicle traveling detection means, the first output is performed irrespective of the contents of the display output of various image sources which are performed based on the user's request while the vehicle is stopped. And controlling the second AV composite signal selecting means to forcibly display and output the video signal and the audio signal input from the second AV composite signal input means to the video display means and the audio output means. And a control means for controlling as described above.

The on-vehicle display device according to the second aspect of the present invention is a vehicle-mounted display device which is mounted on a vehicle or the like and performs display output of various video sources in response to a user's request. From the first AV composite signal supply means, first AV composite signal input means for inputting the video signal and audio signal from the first AV composite signal supply means, and navigation A second AV that supplies the video signal and the audio signal from the system by the AV composite signal supply means configured by a terminal arrangement different from that of the first AV composite signal supply means.
Composite signal supply means, second AV composite signal input means for inputting the video signal and audio signal from the second AV composite signal supply means, and video signal input from the first AV composite signal input means And a voice signal and the second A
An AV composite signal selecting means for selecting one of a video signal and an audio signal input from the V composite signal input means, a television signal receiving means, and a video signal supplied from the television signal receiving means. A video signal selecting means for selecting any one of the video signals selected by the AV composite signal selecting means, an audio signal supplied from the television signal receiving means, and the AV composite signal selecting means. Audio signal selection means for selecting any of the audio signals, video display means for displaying the video signal selected by the video signal selection means, and audio for outputting the audio signal selected by the audio signal selection means Output means, vehicle traveling detection means for detecting whether the vehicle is stopped or traveling, and traveling state of the vehicle by the vehicle traveling detection means. When detected, the AV composite signal selection means, the video signal selection means, and the AV signal selection means, regardless of the contents of the display output of various video sources that have been performed based on the user's request while the vehicle is stopped. Control for controlling the audio signal selection means to forcibly display and output the video signal and the audio signal input from the second AV composite signal input means to the video display means and the audio output means. Means and means are provided.

An on-vehicle display device according to a third aspect of the present invention is the vehicle-mounted display device according to the first or second aspect,
The first AV composite signal supply means and the second AV
The composite signal supply means is configured in the same shape as a stereo plug for audio equipment, and the arrangement of the video and audio terminals of the second AV composite signal supply means is the same as the first AV composite signal. The arrangement of the video and audio terminals of the supply means is reversed, and the first AV composite signal input means and the second AV composite signal input means are the same as stereo jacks for audio equipment. The second AV composite signal input means has an arrangement of video and audio contacts, and the first AV
It is characterized in that the arrangement is reversed from the arrangement of the video and audio contacts of the composite signal input means.

According to the first to third aspects of the invention, the navigation has a terminal arrangement different from the arrangement of the video / audio terminals in the AV composite terminal used as a general external video signal input terminal.・ Providing a system-specific AV composite input terminal and vehicle running detection means,
The user can view the AV program desired by the user when the vehicle is stopped, and forcibly when the vehicle is running.
Since the AV signal input from the AV composite input terminal dedicated to the navigation system is output (switched), it is possible to prevent the inattentive driving when the vehicle is traveling and for a navigation system that does not hinder safe driving. It is possible to provide a vehicle-mounted display device that is optimal as a monitor.

A vehicle-mounted display device according to a fourth aspect of the present invention is a vehicle-mounted display device that is mounted in a vehicle or the like, and displays and outputs various video sources in response to a user's request. And a video signal and an audio signal from the navigation system are arranged in a terminal arrangement different from that of the first AV composite signal supplying means. Second A supplied by the AV composite signal supplying means
V composite signal supply means, AV composite signal input means for inputting video signals and audio signals from the first and second AV composite signal supply means, and video signal and audio input from the AV composite signal input means The AV composite signal selection means for selecting a signal based on the user's request, the first signal cutoff means for muting the video output signal from the AV composite signal selection means, and the AV composite signal selection means Second signal cutoff means for muting the audio output signal, and video signal detection means for detecting whether or not the signal input from the AV composite signal selection means to the second signal cutoff means is a video signal. A video display unit for displaying the video signal output from the first signal blocking unit;
The audio output means for outputting the audio signal output from the signal blocking means, the vehicle running detection means for detecting whether the vehicle is stopped or running, and the AV composite signal selection means for displaying the image from the navigation system. In a state other than selecting a signal and a voice signal, and the traveling state of the vehicle is detected by the vehicle traveling detection means,
The AV composite signal selection means controls the AV composite signal selection means irrespective of the display output contents of various video sources selected based on the user's request when the vehicle is stopped. The video signal and the audio signal forcibly input from the second AV composite signal supply means are controlled to be displayed and output to the video display means and the audio output means, and the AV signal is detected by the video signal detection means. When the signal output from the selecting means is a video signal, the first and second signal cutoff means are controlled to output the video and audio output signals from the AV composite signal selecting means. And a control means for controlling so as to mute.

The on-vehicle display device according to the fifth aspect of the invention is a vehicle-mounted display device which is mounted on a vehicle or the like and which outputs and outputs various video sources in response to a user's request. And a video signal and an audio signal from the navigation system are arranged in a terminal arrangement different from that of the first AV composite signal supplying means. Second A supplied by the AV composite signal supplying means
V composite signal supply means, AV composite signal input means for inputting video signals and audio signals from the first and second AV composite signal supply means, and video signal and audio input from the AV composite signal input means AV composite signal selecting means for selecting a signal route of a signal based on the request of the user, television signal receiving means, a video signal supplied from the television signal receiving means, and the AV
A video signal selecting means for selecting the video signal or audio signal selected by the composite signal selecting means based on the user's request; a first signal cutoff means for muting an output signal from the video signal selecting means; The audio signal supplied from the television signal receiving means, the audio signal selecting means for selecting the video signal or the audio signal selected by the AV composite signal selecting means, and the signal input to the audio signal selecting means are the video signals. And a video signal output from the first signal blocking means, a second signal blocking means for muting the output signal from the audio signal selecting means, and a video signal output from the first signal blocking means are displayed. Image display means, audio output means for outputting the audio signal output from the second signal cutoff means, and detection of whether the vehicle is stopped or running When the traveling state of the vehicle is detected by the vehicle traveling detection means in a state other than the vehicle traveling detection means and the video signal selecting means and the audio signal selecting means selecting the video signal and the audio signal from the navigation system. In the state where the vehicle is stopped, the video signal selection means and the audio signal selection means are irrespective of the contents of the display output of various video sources selected based on the user's request. By controlling the signal selection means, the video signal selection means, and the audio signal selection means, the video signal and the audio signal forcibly input from the second AV composite signal supply means are displayed as the video display means and the audio output. Control to display output to the means,
When the signal input to the audio signal selection means is notified by the video signal detection means that the signal is a video signal,
Control means for controlling the first and second signal cutoff means so as to mute the output signals from the video signal selection means and the audio signal selection means.

According to the invention described in claims 4 and 5, in addition to the operation according to the invention described in claims 1 to 3, the same effect as described above can be obtained by one external video signal input terminal. It was done like this. Similarly to the above, when a general video signal is input to the external video signal input terminal, the AV program desired by the user can be viewed when the vehicle is stopped, and the video signal is output to the speaker when the vehicle is running, When the audio signal is output to the display element, a buzz sound or the like is generated, which makes the viewer uncomfortable. However, the audio system is provided with a video signal detecting means,
When the above-mentioned inversion of the output of the video and audio occurs while the vehicle is running, both the video and audio signals are cut off (making it impossible to watch any video). In this state, both video and audio signals can be cut without generating a buzz sound or the like. On the other hand, when an AV signal from the navigation system is input to the external video signal input terminal, it can always be used as a navigation system monitor regardless of whether the vehicle is stopped or running.

A vehicle-mounted display device according to the invention of claim 6 is the vehicle-mounted display device according to claim 4 or 5,
The control means may mute only the video output signal from the video signal selecting means.

According to the invention described in claim 6, in addition to the operation according to the invention described in claims 1 to 5, 7, 8 and 10, a general video signal is input to the external video signal input terminal. When is input and the vehicle is running, it is configured not to forcibly switch to the navigation input mode and to cut only the video signal (making it impossible to watch any video). Since it does not hinder safe driving, only the voice can be heard even when the vehicle is running. In addition, if the vehicle is stopped, it is of course possible to view the AV program or the like desired by the user.

The on-vehicle display device according to the invention of claim 7 is a vehicle-mounted display device which is mounted on a vehicle or the like and performs display output of various video sources according to a user's request. And a video signal and an audio signal from the navigation system are arranged in a terminal arrangement different from that of the first AV composite signal supplying means. Second A supplied by the AV composite signal supplying means
V composite signal supply means, AV composite signal input means for inputting video signals and audio signals from the first and second AV composite signal supply means, and video signal and audio input from the AV composite signal input means AV composite signal selection means for selecting a signal route of a signal based on the user's request, first signal cutoff means for muting a video output signal from the AV composite signal selection means, and AV composite signal selection Second signal cutoff means for muting an audio output signal from the means, and if the signal inputted from the AV composite signal selection means to the second signal cutoff means is a video signal, the first and Video signal detection means operable to directly control the second signal cutoff means to mute the video output signal and audio output signal from the AV composite signal selection means. A video display means for displaying the video signal output from the first signal blocking means, a voice output means for outputting a voice signal output from the second signal blocking means, and a vehicle stopped or running. The vehicle running detection means for detecting whether the vehicle is running and the AV composite signal selection means are in a state other than selecting the video signal and the audio signal from the navigation system, and the running state of the vehicle by the vehicle running detection means. Is detected, the AV composite signal is selected regardless of the contents of the display output of various video sources selected by the AV composite signal selection means based on the user's request when the vehicle is stopped. By controlling the selection means, the video signal and the audio signal forcibly input from the second AV composite signal supply means are transferred to the video display means and the audio output hand. Characterized by comprising a control means for controlling to display output.

The on-vehicle display device according to the invention of claim 8 is a vehicle-mounted display device which is mounted on a vehicle or the like and performs display output of various video sources in response to a user's request. And a video signal and an audio signal from the navigation system are arranged in a terminal arrangement different from that of the first AV composite signal supplying means. Second A supplied by the AV composite signal supplying means
V composite signal supply means, AV composite signal input means for inputting video signals and audio signals from the first and second AV composite signal supply means, and video signal and audio input from the AV composite signal input means The signal is selected by the AV composite signal selecting means that performs selection of the signal based on the user's request, the television signal receiving means, the video signal supplied from the television signal receiving means, and the AV composite signal selecting means. A video signal selecting means for selecting a video signal or an audio signal based on the user's request, and a first signal for muting an output signal from the video signal selecting means.
Of the signal blocking means, the audio signal supplied from the television signal receiving means, the audio signal selecting means for selecting the video signal or the audio signal selected by the AV composite signal selecting means, and the audio signal selecting means. Second signal cutoff means for muting the output signal of the above and the signal inputted to the audio signal selection means are video signals, the first and second signal cutoff means are directly controlled, A video signal detecting means operable to mute output signals from the video signal selecting means and the audio signal selecting means; a video display means for displaying the video signal output from the first signal blocking means; Audio output means for outputting the audio signal output from the signal blocking means of 2.
In a state other than the vehicle running detection means for detecting whether the vehicle is stopped or running, and the video signal selection means and the audio signal selection means selecting the video signal and the audio signal from the navigation system, When the traveling state of the vehicle is detected by the vehicle traveling detection means, various types selected by the video signal selection means and the audio signal selection means based on the user's request while the vehicle is stopped. Irrespective of the contents of the display output of the video source, the AV composite signal selecting means, the video signal selecting means, and the audio signal selecting means are controlled to be forcibly input from the second AV composite signal supplying means. Control means for controlling to display and output the video signal and the audio signal to the video display means and the audio output means.

Here, according to the invention described in claims 7 and 8 above, in addition to the operation according to the invention described in claims 1 to 3, there is an effect according to the invention described in claims 4 and 5.

An on-vehicle display device according to a ninth aspect of the invention is the vehicle-mounted display device according to the seventh or eighth aspect.
The video signal detection means mutes only the video output signal from the AV composite signal selection means.

Here, according to the invention described in claim 9, there is an operation according to the invention described in claims 1 to 8 and 10.

An on-vehicle display device according to a tenth aspect of the present invention is the vehicle-mounted display device according to any one of the fourth to ninth aspects, wherein the first AV composite signal supply means and the second AV composite signal are provided. The supply means is configured in the same shape as a stereo plug for audio equipment, and the arrangement of the video and audio terminals of the second AV composite signal supply means is the first AV composite signal supply means. It is characterized in that it is arranged opposite to the arrangement of the video and audio terminals.

Here, according to the invention described in claim 10, in addition to the operation according to the invention described in claims 1 to 3,
It has the action according to the invention described in claims 4 and 5.

[0034]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a principal block diagram showing an embodiment of an in-vehicle display device according to the present invention. Further, FIG. 2 is a diagram showing a connection relationship between the AV composite plug and the AV composite jack.

In FIG. 1, the same parts as those of the conventional vehicle-mounted display device are designated by the same reference numerals, and the description thereof will be omitted. A difference between the on-vehicle display device of the present invention shown in FIG. 1 and the conventional on-vehicle display device is that a signal input terminal 22 for a navigation system is provided.

An AV composite jack 21 (general purpose) is provided for inputting an external video signal, and an AV composite jack 22 is provided for inputting a signal for a navigation system.
(For navigation system) respectively. Further, as shown in FIG. 2A, an AV composite plug 31 (for general use) is inserted into the insertion hole 41 of the AV composite jack 21, and the video terminal 49, the video contactor 45, and the audio terminal are provided. The terminal 50 and the voice contact 46 are in contact with each other. And the AV composite jack 22
The AV composite plug 32 is inserted into the insertion hole 42 (for navigation system) as shown in FIG. 2B, and the video terminal 52 and the video contactor 48, and the audio terminal 51 and the audio The contacts 47 are in contact with each other. That is, in the AV composite plugs 31 and 32, the arrangement of the video terminals and the audio terminals is reversed. The terminal V1 of the external video signal input jack 21 is the input terminal a1 and the terminal A1 of the switch S1 that constitutes the switch circuit 15.
Are respectively connected to the input terminals b1 of the switches S2 constituting the switch circuit 15, and the terminal A2 of the navigation system signal input jack 22 is connected to the input terminals b2 and V2 of the switches S2 constituting the switch circuit 15.
Are respectively connected to the input terminals a2 of the switch S1 forming the switch circuit 15. Furthermore, the switch S1
Is connected to the video switch 5, and the output terminal b3 of the switch S2 is connected to the audio switch 9
It is connected to the. A video signal V _TV is input from the PIF circuit 4 to the video switch 5, and an audio signal A _TV is input from the SIF circuit 8 to the audio switch 9.
Is input, and the source of the input video signal or the input audio signal is switched under the control of the control circuit 3, and is output to the video demodulation circuit 6 or the amplification circuit 10 in the subsequent stage. There is.

The operation of the embodiment of the in-vehicle display device of the present invention configured as above will be described below. FIG. 3 is a flowchart showing the operation of the control circuit 3 which constitutes the vehicle-mounted display device of the present invention.

When the power supply of the in-vehicle display device of the present invention shown in FIG. 1 is turned on, the control circuit 3 determines whether or not the vehicle is currently stopped (step s1),
When the result is negative, that is, when it is determined that the vehicle is traveling, the output terminal a3 of the switch S1 and the output terminal b3 of the switch S2 are changed to the input terminal a2 of the switch S1 and the switch S2.
The input terminals b2 are controlled to be selected (step s4).

On the other hand, when it is determined in step s1 that the vehicle is stopped, the image to be displayed on the display element 7 and the sound to be output from the speaker 11 requested by the user are external input signals, that is, AV compound jack 21 (for general use) or AV compound jack 22 (for navigation)
It is determined whether or not the signal is a signal input from the PIF circuit (step s2). 4 (V _TV ) and SIF circuit 8 output (A _TV ) are selected (step s5).

If the video signal and audio signal requested by the user are external input signals in step s2, it is determined whether the user request is a navigation signal (step s3). ), If it is a navigation signal, the output terminal a3 of the switch S1 and the output terminal b3 of the switch S2 respectively select the input terminal a2 of the switch S1 and the input terminal b2 of the switch S2 (step s4). ,
The output terminal a3 of the switch S1 and the output terminal b3 of the switch S2 are the input terminal a1 of the switch S1 and the switch S2.
2 input terminals b1 are selected respectively (step s
6).

By operating as described above, the image to be displayed on the display element 7 and the speaker 11 which are input by the input means (not shown) and which the user requests are displayed.
The audio that should be output from the external video signal input jack 2
When the signal is input from 1, the image and sound as requested by the user can be obtained when the vehicle is stopped, but when the vehicle starts traveling, consideration for safe driving such as inattentive driving prevention, Navigation by the signal obtained from the signal input jack 22 for the navigation system
The video and audio of the system are forcibly switched. If the video image to be displayed on the display element 7 and the voice to be output from the speaker 11 requested by the user are signals input from the signal input jack 22 for the navigation system, the vehicle running / stopped state. Regardless of whether the navigation system always uses the signal obtained from the signal input jack 22 for the navigation system.
The video and audio of the system will be obtained.

By the way, in the vehicle-mounted display device according to the present invention, as described above, when the navigation system signal input jack 22 is selected, the navigation system signal input jack is always operated regardless of whether the vehicle is running or stopped. Since the image and the sound based on the signal obtained from 22 are obtained, the navigation is performed in an attempt to obtain the image and the sound based on the signal supplied from the AV composite plug 31 (for general use) regardless of the state of running or stopping the vehicle. Even if the AV composite plug 31 (general purpose) is inserted into the system signal input jack 22, as described above, A
The V composite plugs 31 and 32 are arranged such that the arrangement of the video terminals and the audio terminals is reversed, and accordingly, the AV composite jack 21 (for general use) and the AV composite jack 22 (for navigation system) are combined. Since the arrangement of the video contactor and the audio contactor is reversed, even if an attempt is made to view an image while the vehicle is traveling in this state, flicker-like stripes due to the audio signal are displayed on the screen of the display element 7. On the other hand, the buzz sound based on the video signal is only output from the speaker 11, and the viewing is substantially impossible. Further, the buzz sound can also be used as a warning sound for misuse.

In this embodiment, the arrangement of the video terminals and the audio terminals of the AV composite plugs 31 and 32 is reversed, and the AV composite jack 21 (general purpose) and the AV composite jack 22 (navigation / navigation The above operation is realized by reversing the arrangement of the video contactor (for the system) and the audio contactor.
Connection cord for connecting terminals (connection plug) without reversing the arrangement of the video and audio terminals of the composite plug 32
Via the AV composite plug 32 and the AV composite jack 2
It can also be realized by connecting with 2 (for navigation system). However, in the latter case (using a connection cord for terminal conversion), if the connection cord (connection plug) for terminal conversion is connected to the AV composite jack of a general moving image signal source, the AV composite jack 22
Since all the signals input from (for navigation system) can be valid, the former method (reversing the arrangement of the video terminals and audio terminals of the AV composite plugs 31 and 32) is used for safety. Seems desirable.

Next, in the above embodiment, when the AV composite plug 31 (for general use) is inserted into the AV composite jack 22 (for navigation system), the video signal and the audio signal are output in reverse while the vehicle is running, Although an unpleasant state occurs as described above, another embodiment example in which this is prevented and one AV composite jack is used will be described.

FIG. 4 shows an AV composite jack 21 (for general use).
FIG. 9 is a block diagram showing another embodiment of the in-vehicle display device according to the present invention, which also serves as the AV composite jack 22 (for navigation system) and has one external video signal input terminal.

In FIG. 4, parts common to those of the vehicle-mounted display device shown in FIG.

An AV composite jack 25 is provided as an external AV signal input jack in which the external video signal input jack 21 and the navigation system signal input jack 22 are commonly used. Also, AV composite jack 2
The insertion hole 43 of 5 is configured so that an AV composite plug 31 (for general use) or an AV composite plug 32 (for navigation system) can be inserted therein as shown in FIGS. The contactor 53 is connected to the terminal X and the contactor 54 is connected to the terminal Y, respectively, and the terminal X is the input terminal a1 of the switch S1 constituting the switch circuit 15.
, And the input terminal b2 of the switch S2, and the terminal Y is the input terminal a of the switch S1 constituting the switch circuit 15.
2 and the input terminal b1 of the switch S2, respectively. Further, the output terminal a3 of S1 is connected to the video switch 5, the output terminal b3 of the switch S2 is connected to the audio switch 9, and a signal input by detecting a synchronizing signal or the like is a video signal. It is connected to the video signal detection circuit 16 which determines that there is. further,
A video mute circuit 17 is inserted between the video switch 5 and the video demodulation circuit 6, and an audio mute circuit 18 is inserted between the audio switch 9 and the amplifier circuit 10. When 16 determines that the signal input from the output terminal b3 of the switch S2 is a video signal, the video signal detection circuit 16 sends a video signal detection signal 61 to the control circuit 3. The control circuit 3 receiving this signal mutes (cuts off) both the video mute circuit 17 and the audio mute circuit 18.
Control. Note that, in consideration of only safe driving such as inattentive driving prevention, only the video mute circuit 17 is muted (blocked) so that only image display is not performed on the display element 7 (audio signal is output). You may control.

The in-vehicle display of the present invention in which the AV composite jack 21 (for general use) and the AV composite jack 22 (for navigation system) configured as described above are also used and only one external video signal input terminal is provided. The operation of another embodiment of the apparatus will be described below. FIG. 5 is a flow chart showing the operation of the control circuit 3 constituting the vehicle-mounted display device according to another embodiment of the present invention.

When the power supply of the on-vehicle display device of the present invention shown in FIG. 4 is turned on, the control circuit 3 judges whether or not the vehicle is currently stopped (step t1),
When the result is negative, that is, when it is determined that the vehicle is traveling, the output terminal a3 of the switch S1 and the output terminal b3 of the switch S2 are changed to the input terminal a2 of the switch S1 and the switch S2.
The input terminals b2 are controlled so as to be selected (step t4). The video signal detection circuit 1 shown in FIG.
6 determines whether or not the video signal is detected (step t5). When the video signal is detected, the video mute circuit 17 and the audio mute circuit 18 in FIG. Also, the audio signal is muted (step t6), and if the video signal is not detected, the process ends.

On the other hand, if it is determined in step t1 that the vehicle is stopped, the image to be displayed on the display element 7 and the sound to be output from the speaker 11 requested by the user are external input signals, that is, It is determined whether the signal is input from the AV composite jack 25 (step t
2) If the video and audio signals requested by the user are not external input signals, the video switch 5 and the audio switch 9 output the PIF circuit 4 (V _TV ) and SIF.
The output (A _TV ) of the circuit 8 is selected (step t).
7).

If the video signal and audio signal requested by the user are external input signals in step t2, it is determined whether the user request is a navigation signal (step t3). ), If it is a navigation signal, the output terminal a3 of the switch S1 and the output terminal b3 of the switch S2 respectively select the input terminal a2 of the switch S1 and the input terminal b2 of the switch S2 (step t4). ,
The output terminal a3 of the switch S1 and the output terminal b3 of the switch S2 are the input terminal a1 of the switch S1 and the switch S2.
2 input terminals b1 are selected respectively (step t
8).

By the above operation, when the vehicle is stopped, the source of the image to be displayed on the display element 7 and the audio to be output from the speaker 11 which is requested by the user and input from the input means (not shown). Regardless of the type, the video and audio can be obtained as requested by the user. However, when the vehicle starts to run, video and audio cannot be obtained for anything other than the video and audio signals of the navigation system in consideration of safe driving such as looking aside.

According to the present embodiment, for example, when the user tries to view video software consisting of general AV signals when the vehicle is stopped, the AV composite plug (general purpose) 31 is inserted into the AV composite jack 25. Even if you accidentally insert the AV composite plug (for navigation) 32,
As in the above-described embodiment, a flicker-like stripe due to an audio signal is displayed on the tube surface of the display element 7, a buzz sound due to a video signal is output from the speaker 11, and an unpleasant output is prevented. To be done. In the present embodiment, when the user inserts the wrong AV composite plug into the AV composite jack (for both general and navigation) 25 for the video (and audio) source specified by the control circuit 3, for example, When the video signal is muted, the user can be notified of the error by displaying the screen of the display element 7 in light blue (blue screen display) or the like.

Next, a modified example of the embodiment shown in FIG. 4 will be described below.

FIG. 6 shows an AV composite jack 21 (general purpose).
2 is a block diagram showing a vehicle-mounted display device that also serves as an AV composite jack 22 (for navigation system), and a video signal detection circuit 16 performs mute control.

In FIG. 6, parts common to those of the vehicle-mounted display device shown in FIG.

When the video signal detection circuit 16 detects that the signal input from the output terminal b3 of the switch S2 is a video signal, the video signal detection circuit 16 causes the video mute circuit 17 and the audio mute circuit 18 to operate. The control is performed so as to mute (cut off) both of them or only the video mute circuit 17. That is, the difference from the embodiment of FIG. 4 is that the video signal detection circuit 16 does not send (without passing) the video signal detection signal 61 to the control circuit 3 and the video signal detection circuit 16 itself. For mute control, video mute circuit 17
And the audio mute circuit 18 or only one of the video mute circuits 17 is performed.

[0058]

As described above, according to the on-vehicle display device of the present invention, the AV composite plug dedicated to the navigation system having the terminal arrangement different from the general AV composite plug for external video input is provided. When the running state of a vehicle equipped with the on-vehicle display device is detected, the navigation mode is forcibly set regardless of the image receiving mode (TV broadcasting, video software, navigation system, etc.) when stopped. Therefore, it is possible to prohibit the display of video playback video (video other than the navigation system) while the vehicle is running, and it can be used as a monitor for the navigation system that does not hinder safe driving. .

[Brief description of drawings]

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

FIG. 2 is a diagram showing a connection relationship between an AV composite plug and an AV composite jack.

FIG. 3 is a flowchart showing an operation of a control circuit which constitutes the vehicle-mounted display device of the present invention.

FIG. 4 is a block diagram showing another embodiment of the in-vehicle display device of the present invention in which the general-purpose AV composite jack and the navigation system AV composite jack are combined and only one external video signal input terminal is provided. is there.

FIG. 5 is a flowchart showing an operation of a control circuit that constitutes a vehicle-mounted display device according to another embodiment of the present invention.

FIG. 6 is a block diagram showing a vehicle-mounted display device in which a general-purpose AV composite jack is also used as a navigation system AV composite jack, and a video signal detection circuit performs mute control.

FIG. 7 is a block diagram showing a configuration example of a conventional vehicle-mounted display device.

FIG. 8 is a diagram showing an example of a simple and space-saving AV plug and jack.

[Explanation of symbols]

3 ... Control circuit 5 ... Video switch 6 ... Video demodulation circuit 7 ... Display element 9 ... Audio switch 10 ... Amplifier circuit 11 ... Speaker 12 ... Running detection circuit 15 ... Switch circuit 21 ... AV compound jack (general purpose) 22 ... AV compound Jack (for navigation) 41, 42, 43 ... Insertion hole 45, 48 ... Video contactor 46, 47 ... Audio contactor V1, V2 ... Video signal input terminal A1, A2 ... Audio signal input terminal S1, S2 ... Switch a1, a2, b1, b2 ... Input terminal a3, b3 ... Output terminal V _TV ... Video signal from TV tuner A _TV ... Audio signal from TV tuner

Claims (10)

[Claims] 1. A vehicle-mounted display device mounted on a vehicle or the like, which displays and outputs various video sources in response to a user's request, and supplies a video signal and an audio signal from a general AV source or the like. A first AV composite signal input means for inputting a video signal and an audio signal from the first AV composite signal supply means; and a video signal and an audio signal from the navigation system, Second AV composite signal supply means supplied by the AV composite signal supply means having a terminal arrangement different from that of the first AV composite signal supply means, and a video signal from the second AV composite signal supply means A second AV composite signal input means for inputting an audio signal, a video signal input from the first AV composite signal input means, and a second AV composite signal input means. First AV composite signal selection means for selecting any one of the input video signals, audio signal input from the first AV composite signal input means, and second AV composite signal input means Second AV composite signal selection means for selecting any of the input audio signals, video display means for displaying the video signal, audio output means for outputting the audio signal, and when the vehicle stops. Vehicle traveling detection means for detecting whether the vehicle is traveling or not, and when the traveling state of the vehicle is detected by the vehicle traveling detection means, various types of operations performed on the basis of the user's request while the vehicle is stopped Regardless of the display output content of the video source, the first and second AV composite signal selecting means are controlled to forcibly input the video signal and the audio signal from the second AV composite signal input means. The image display unit as well as in-vehicle display device being characterized in that and a control means for controlling to display output to the sound output unit. 2. An in-vehicle display device mounted on a vehicle or the like, which displays and outputs various video sources in response to a user's request, and which supplies video signals and audio signals from general AV software or the like. A first AV composite signal input means for inputting a video signal and an audio signal from the first AV composite signal supply means; and a video signal and an audio signal from the navigation system, Second AV composite signal supply means supplied by the AV composite signal supply means having a terminal arrangement different from that of the first AV composite signal supply means, and a video signal from the second AV composite signal supply means Second AV composite signal input means for inputting the audio signal and the video signal and audio signal input from the first AV composite signal input means, and the second AV composite signal AV composite signal selecting means for selecting either the video signal or the audio signal input from the signal input means, the television signal receiving means, the video signal supplied from the television signal receiving means, and the AV Video signal selecting means for selecting any one of the video signals selected by the composite signal selecting means, an audio signal supplied from the television signal receiving means, and an audio signal selected by the AV composite signal selecting means Audio signal selection means for selecting any one of the above, video display means for displaying the video signal selected by the video signal selection means, and audio output means for outputting the audio signal selected by the audio signal selection means A vehicle traveling detection means for detecting whether the vehicle is stopped or traveling, and the traveling state of the vehicle is detected by the vehicle traveling detection means. When issued, the AV composite signal selection means, the video signal selection means, and the AV signal selection means, regardless of the contents of the display output of various video sources that have been performed based on the user's request while the vehicle is stopped. Control means for controlling the audio signal selecting means so as to forcibly display and output the video signal and the audio signal input from the second AV composite signal input means to the video display means and the audio output means. An in-vehicle display device comprising: 3. The first AV composite signal supply means and the second AV composite signal supply means are configured in the same shape as a stereo plug for audio equipment, and the second AV composite signal supply means. The arrangement of the video and audio terminals of the supply means is opposite to the arrangement of the video and audio terminals of the first AV composite signal supply means, and the first AV composite signal input means and The second AV
The composite signal input means has a shape similar to that of a stereo jack for audio equipment, and the second AV
7. The arrangement of the video and audio contacts of the composite signal input means is arranged opposite to the arrangement of the video and audio contacts of the first AV composite signal input means. The in-vehicle display device according to 1 or 2. 4. A vehicle-mounted display device mounted on a vehicle or the like and displaying and outputting various video sources according to a user's request, which supplies video signals and audio signals from general AV software or the like. A second AV composite signal supply means and a video signal and an audio signal from the navigation system are supplied by an AV composite signal supply means having a terminal arrangement different from that of the first AV composite signal supply means. AV composite signal supply means, AV composite signal input means for inputting the video signal and audio signal from the first and second AV composite signal supply means, and the video signal input from the AV composite signal input means An AV composite signal selecting means for selecting an audio signal based on the user's request, and a video output signal from the AV composite signal selecting means are muted Signal cutoff means, second signal cutoff means for muting an audio output signal from the AV composite signal selection means, and a signal input from the AV composite signal selection means to the second signal cutoff means is a video signal. Video signal detection means for detecting whether or not the video signal is output, a video display means for displaying the video signal output from the first signal blocking means, and an audio signal output from the second signal blocking means Audio output means, vehicle running detection means for detecting whether the vehicle is stopped or running, and a state other than the AV composite signal selection means selecting the video signal and audio signal from the navigation system When the traveling state of the vehicle is detected by the vehicle traveling detection means, the AV composite signal selection means is operated by the user when the vehicle is stopped. Regardless of the display output contents of various video sources selected based on the request, the AV composite signal selection means is controlled,
The video signal and the audio signal forcibly input from the second AV composite signal supply means are controlled to be displayed and output to the video display means and the audio output means, and the video signal detection means selects the AV composite signal. When the notification that the signal output from the means is a video signal is received, the first and second signal blocking means are controlled to control the AV signal.
An in-vehicle display device, comprising: a control unit that controls to mute the video and audio output signals from the composite signal selection unit. 5. An in-vehicle display device mounted on a vehicle or the like and displaying and outputting various video sources according to a user's request, which supplies video signals and audio signals from general AV software or the like. A second AV composite signal supply means and a video signal and an audio signal from the navigation system are supplied by an AV composite signal supply means having a terminal arrangement different from that of the first AV composite signal supply means. AV composite signal supply means, AV composite signal input means for inputting the video signal and audio signal from the first and second AV composite signal supply means, and the video signal input from the AV composite signal input means AV composite signal selecting means for selecting a signal route of an audio signal based on the user's request, television signal receiving means, and the television signal. A video signal supplied from the receiving means and a video signal selecting means for selecting the video signal or the audio signal selected by the AV composite signal selecting means based on the user's request, and an output signal from the video signal selecting means. A first signal cutoff means for muting, an audio signal supplied from the television signal receiving means, an audio signal selection means for selecting the video signal or the audio signal selected by the AV composite signal selection means, Video signal detecting means for detecting whether or not the signal input to the audio signal selecting means is a video signal, second signal cutoff means for muting an output signal from the audio signal selecting means, and the first Video display means for displaying the video signal output from the signal blocking means, and an audio output means for outputting the audio signal output from the second signal blocking means. A vehicle traveling detection means for detecting whether the vehicle is stopped or traveling, and in a state other than the video signal selection means and the audio signal selection means selecting the video signal and the audio signal from the navigation system. When the traveling state of the vehicle is detected by the vehicle traveling detection means, the video signal selection means and the audio signal selection means are selected based on the user's request while the vehicle is stopped. Regardless of the display output contents of various video sources, the AV composite signal selection means, the video signal selection means, and the audio signal selection means are controlled to be forcibly input from the second AV composite signal supply means. The video signal and the audio signal are controlled to be displayed and output to the video display means and the audio output means, and the audio signal is selected by the video signal detecting means. When receiving the notification that the signal input to the means is a video signal, the first and second signal cutoff means are controlled to output from the video signal selection means and the audio signal selection means. An in-vehicle display device comprising: a control unit that controls so as to mute a signal. 6. The in-vehicle display device according to claim 4, wherein the control means mutes only a video output signal from the video signal selection means. 7. An in-vehicle display device mounted on a vehicle or the like and displaying and outputting various video sources according to a user's request, which supplies video signals and audio signals from general AV software or the like. A second AV composite signal supply means and a video signal and an audio signal from the navigation system are supplied by an AV composite signal supply means having a terminal arrangement different from that of the first AV composite signal supply means. AV composite signal supply means, AV composite signal input means for inputting the video signal and audio signal from the first and second AV composite signal supply means, and the video signal input from the AV composite signal input means The AV composite signal selecting means for selecting the signal route of the audio signal based on the user's request and the video output signal from the AV composite signal selecting means are mixed. A first signal cutoff means for switching the audio signal, a second signal cutoff means for muting an audio output signal from the AV composite signal selection means, and an input from the AV composite signal selection means to the second signal cutoff means. When the detected signal is a video signal, the video is operated to directly control the first and second signal cutoff means to mute the video output signal and the audio output signal from the AV composite signal selection means. Signal detection means, video display means for displaying the video signal output from the first signal blocking means, audio output means for outputting the audio signal output from the second signal blocking means, and vehicle stop Other than the vehicle running detection means for detecting whether the vehicle is running or running, and the AV composite signal selection means selecting the video signal and audio signal from the navigation system. When the traveling state of the vehicle is detected by the vehicle traveling detection means, various types selected by the AV composite signal selection means based on the user's request when the vehicle is stopped. Regardless of the display output content of the video source, the AV composite signal selection means is controlled to force the video signal and the audio signal input from the second AV composite signal supply means to the video display means and the video display means. A vehicle-mounted display device, comprising: a control unit that controls the audio output unit to output a display. 8. An in-vehicle display device mounted on a vehicle or the like and displaying and outputting various video sources according to a user's request, which supplies video signals and audio signals from general AV software or the like. A second AV composite signal supply means and a video signal and an audio signal from the navigation system are supplied by an AV composite signal supply means having a terminal arrangement different from that of the first AV composite signal supply means. AV composite signal supply means, AV composite signal input means for inputting the video signal and audio signal from the first and second AV composite signal supply means, and the video signal input from the AV composite signal input means An AV composite signal selecting means for selecting an audio signal based on the user's request, a television signal receiving means, and the television signal receiving means. The supplied video signal, the video signal selecting means for selecting the video signal or the audio signal selected by the AV composite signal selecting means on the basis of the user's request, and the output signal from the video signal selecting means is muted. First signal cutoff means, an audio signal supplied from the television signal reception means, an audio signal selection means for selecting a video signal or an audio signal selected by the AV composite signal selection means, and the audio signal selection Second signal cutoff means for muting an output signal from the means, and directly detecting the first and second signal cutoff means when detecting that the signal input to the audio signal selection means is a video signal. And a video signal detecting means operable to mute the output signals from the video signal selecting means and the audio signal selecting means, and the first signal. Video display means for displaying the video signal output from the signal blocking means, audio output means for outputting the audio signal output from the second signal blocking means, and detecting whether the vehicle is stopped or running The vehicle traveling state is detected by the vehicle traveling detecting means in a state other than the vehicle traveling detecting means, the image signal selecting means and the audio signal selecting means selecting the image signal and the audio signal from the navigation system. In the case where the vehicle is stopped, the video signal selecting means and the audio signal selecting means are irrespective of the contents of the display output of various video sources selected based on the user's request. A
By controlling the V composite signal selection means, the video signal selection means, and the audio signal selection means, the video signal and the audio signal forcibly input from the second AV composite signal supply means are displayed on the video display means and the An in-vehicle display device comprising: a control unit that controls the audio output unit to output the display. 9. The in-vehicle display device according to claim 7, wherein said video signal detecting means mutes only a video output signal from said AV composite signal selecting means. 10. The first AV composite signal supply means and the second AV composite signal supply means are configured in the same shape as a stereo plug for audio equipment, and the second AV composite signal supply means. 10. The arrangement of the video and audio terminals of the supply means is opposite to the arrangement of the video and audio terminals of the first AV composite signal supply means. The in-vehicle display device described in any one of 1.