JPH09135396A - On-vehicle television receiver providing with navigation connection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow the user to view and listen to different video image and audio sound from the monitor of a front seat and the monitor of a rear seat by providing a function for line output independently of video and audio signals outputted on the monitor. SOLUTION: In the case of displaying a navigation image on a monitor of a front seat, a switching control signal 11 is used to select a video and audio signal 8 from a navigation device as an output of a video audio switching circuit 10 to give the signal 8 to a monitor circuit 4 and displayed on the monitor. In the case of viewing a television program on a monitor of a rear seat, similarly a switching control signal 13 is used to select a video and audio signal 7 from a TV tuner circuit as an output of a video audio switching circuit 12 to give the signal 7 to a line output circuit 14 and displayed on the rear seat monitor 15. When the rear seat monitor 15 is not provided with a speaker, an audio signal from the line output circuit is given to an on-vehicle device, in which an on-vehicle speaker is active.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation connection-equipped in-vehicle television which is supposed to connect a navigation device and a plurality of monitors.

[0002]

2. Description of the Related Art In recent years, many navigation devices have become popular as in-vehicle devices. Along with this, the number of in-vehicle TVs with navigation connections that have dedicated connection terminals for navigation is increasing. In addition, it is expected that the second monitor will be widely used for the back seat due to the price reduction of the in-vehicle TV.

A conventional navigation connection compatible vehicle-mounted television will be described below. FIG. 2 is a block diagram showing a conventional navigation connection-mounted in-vehicle television. FIG.
In the above, reference numeral 1 is an in-vehicle television for navigation connection, and 2 is a tuner circuit of the in-vehicle television. Reference numeral 3 is a switching control circuit for switching the output of video and audio from a television, a video device, and a navigation device, and 4 is a monitor circuit for outputting a video / audio signal selected by the switching circuit. Reference numeral 5 is a navigation device, and 6 is a video device such as an on-vehicle video or video camera. 7 is a TV tuner circuit 2
Is a video / audio signal from the navigation device 5, and 9 is a video / audio signal from the video device 6. Reference numeral 15 is a rear seat monitor different from the front seat monitor 4. Reference numeral 16 is a video / audio switching circuit for switching video / audio signals for television, video and navigation, and 17 is a switching control signal for controlling the video / audio switching circuit 16.
Reference numeral 14 is a line output circuit for outputting the video / audio signal selected by the video / audio switching circuit 16 to the vehicle-mounted audio device or the rear seat monitor 15.

The operation of the navigation connection-equipped vehicle-mounted television configured as described above will be described below.

First, a navigation device 5 and a video device 6 are connected to a navigation connection compatible vehicle-mounted television 1. The TV video / audio signal 7, the navigation video / audio signal 5, and the video / audio signal 9 are converted into a video / audio switching circuit 16
The video / audio signal is selected by the switching control signal 17 of the switching control circuit 3. The selected signal is input to the monitor circuit 4 and displayed. Further, it is also input to the line output circuit 14 and is output by the rear seat monitor 15 and the vehicle-mounted audio device.

[0006]

However, in the above-mentioned conventional configuration, since the video / audio signal output from the line output circuit 14 and the video / audio signal output from the monitor circuit 4 are the same, the monitor in the front seat can be used. The video and audio different from the video and audio you are watching cannot be viewed on the rear seat monitor. That is, when the navigation screen is displayed on the front seat monitor, the navigation screen is also displayed on the rear seat monitor. In many cases, the navigation screen only needs to be displayed on the monitor in the front seat such as the driver's seat or the passenger seat, and even if you want to watch TV or video other than the navigation screen on the rear seat, you can not do it with the conventional configuration. there were.

[0007]

SUMMARY OF THE INVENTION The present invention is to solve the above-mentioned problems and is equipped with a navigation connection-equipped vehicle equipped with a function of line-output independently of video and audio output on a monitor. It's a TV.

According to the present invention, while the navigation screen is being displayed on the monitor in the front seat, the navigation-equipped in-vehicle television that allows the user to view the video and audio other than the navigation such as television and video on the monitor in the rear seat by line output. Can be provided.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An in-vehicle television for navigation connection according to claim 1 of the present invention is characterized by having a function of line output independently of video and audio output on a monitor. Therefore, it is possible to watch TV, video, etc. on the monitor in the rear seat while watching the video / audio signal from the navigation device on the monitor in the front seat. It is also possible to use video on the monitor in the front seat and TV on the monitor in the rear seat. Furthermore, by switching the two video / audio switching circuits in synchronization, the same video images can be displayed on the front and rear seat monitors as in the conventional case.
You can also listen to the audio.

According to another aspect of the present invention, there is provided a vehicle-mounted television for navigation connection, wherein an audio / video switching circuit for selecting an audio / video signal output by a monitor circuit and an audio / video for selecting an audio / video signal output by a line output circuit. A navigation device is provided with a switching circuit, and the switching circuit is controlled by a switching control circuit and independently switched to provide a function of line-outputting an image and a sound different from a video and a sound output from a monitor. The video and audio signals from the can be viewed on the monitor in the front seat through the video and audio switching circuit that switches the output to the monitor circuit, and the video and audio signals from TV and video can be output to the line output circuit independently. It can be viewed on the monitor in the rear seat through the video / audio switching circuit that switches the output. That is, even when the navigation screen is displayed on the monitor in the front seat, it is possible to watch television or video on the monitor in the rear seat. It is also possible to use video on the monitor in the front seat and TV on the monitor in the rear seat. Further, by switching the two video / audio switching circuits in synchronism with each other, the same video and audio can be viewed on the monitors of the front seat and the rear seat as in the conventional case.

(Embodiment 1) An embodiment of the invention described in claims 1 and 2 of the present invention will be described below with reference to FIG. FIG. 1 is a block configuration diagram of a vehicle-mounted television compatible with navigation connection according to an embodiment of the present invention. In FIG. 1, parts corresponding to those in FIG. 2 are designated by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 1, reference numeral 10 is a video / audio switching circuit for switching the output to the monitor circuit, which is connected to the monitor circuit 4. Reference numeral 11 is a switching control signal for the switching circuit 10. A video / audio switching circuit 12 switches the output to the line output circuit and is connected to the line output circuit 14. 13
Is a switching control signal of the switching circuit 12. Switching control signal 1
1 and the switching control signal 13 can be synchronized by the switching control circuit 4 or conversely can be independent. The video / audio signal 7 from the television tuner circuit 2, the video / audio signal 8 from the navigation device 5, and the video / audio signal 9 from the video device 6 are input to the switching circuit 10 and the switching circuit 12, respectively.

The operation of the navigation connection-equipped in-vehicle television configured as described above will be described.

First, when the navigation screen is displayed on the monitor in the front seat, the video / audio signal 8 from the navigation device is selected as the output of the video / audio switching circuit 10 by the switching control signal 11 to be input to the monitor circuit 4. Is displayed. When watching television on the monitor in the rear seat, similarly, the line output circuit 14 is selected by selecting the video / audio signal 7 from the TV tuner circuit as the output of the video / audio switching circuit 12 by the switching control signal 13.
And is displayed on the rear seat monitor 15. As a result, different images and sounds can be viewed on the front and rear seats.

If the rear seat monitor 15 is not equipped with a speaker, the voice output from the line output circuit is input to the vehicle-mounted audio device to listen to the voice from the vehicle-mounted speaker. In this case, it is preferable that the vehicle-mounted television 1 be equipped with a main body speaker.

In the above embodiment, the video / audio switching circuit 10 and the video / audio switching circuit 12 are three-input one-output type switching circuits, but may be four-input or more switching circuits in consideration of multi-system inputs. Similarly, the line output circuit 1
4 can also be implemented by a circuit having two or more outputs.

[0017]

As described above, the in-vehicle television for navigation connection according to the present invention has two video / audio switching circuits, the video / audio switching circuit switching the output to the monitor circuit and the video / audio switching circuit switching the output to the line output circuit. By providing a circuit and enabling these video / audio switching circuits to be switched independently of each other, different video and audio can be viewed on the front seat monitor and the rear seat monitor. Further, since the two video / audio switching circuits can be switched in synchronism with each other, it is possible to realize an in-vehicle television which is excellent in navigation connection and can watch the same video and audio on two devices as in the conventional case.

[Brief description of the drawings]

FIG. 1 is a block configuration diagram of a vehicle-mounted television for navigation connection according to an embodiment of the present invention.

FIG. 2 is a block diagram of a conventional car-mounted television for navigation connection.

[Explanation of symbols]

 1 Navigation Connection Compatible Car Television 2 TV Tuner Circuit 3 Switching Control Circuit 4 Monitor Circuit 5 Navigation Device 6 Video Equipment 7 Video / Audio Signal 8 Video / Audio Signal 9 Video / Audio Signal 10 Video / Audio Switching Circuit 11 Switching / Control Signal 12 Video / Audio Switching Circuit 13 Switching control signal 14 Line output circuit 15 Rear seat monitor

Claims (2)

[Claims] 1. A navigation connection-equipped vehicle-mounted television having a function of line-output independently of video and audio output on a monitor. 2. A video / audio switching circuit for selecting a video / audio signal output by a monitor circuit, and a video / audio switching circuit for selecting a video / audio signal output by a line output circuit, wherein the switching circuit is controlled by a switching control circuit. The navigation connection-equipped in-vehicle TV has the function of line output of video and audio different from the video and audio output on the monitor by switching them independently.