JPH09191439A - Small television device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To integrate a cable-form antenna pulled out from a control unit with a cable for video signal transmission in a state that a transmission function can be displayed in a small television device constituted by separating a picture monitor and the control unit. SOLUTION: The cable-form antenna is inserted into the cable for video signal transmission 4 from the control unit 3 and it is laid in the video monitor 2. Although a radio wave emitted from a part 5B in the cable 4 of the antenna is shielded by an electromagnetic shielding layer 12, a radio wave emitted from a part 5A laid in the video monitor 2 is transmitted to an external part through the casing 6 of the monitor. The antenna 5 is provided between the electromagnetic shielding layer 12 of the cable 4 and a cable seath 11 as a different solving means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small television device in which a video monitor and a control unit are separately provided and are connected by a cable.

[0002]

2. Description of the Related Art Conventionally, as a small-sized television apparatus in which a video monitor and a control unit are separately configured, a small television apparatus as shown in FIG.
The vehicle-mounted television device shown in is known. This small television device 15 is configured by connecting a video monitor 16 installed near the dashboard of an automobile and a control unit 17 installed near the driver's seat with a cable 18 for video signal transmission. The video signal generated in 17 is transmitted through the cable 18 to the video monitor 1
6 is transmitted to and output to the monitor screen.

On the other hand, the voice signal is transmitted from the control unit 17 on an FM radio wave or the like, and the FM signal of the automobile is transmitted.
Received and played on the radio. Therefore, as shown in FIG. 5, the control unit 17 is connected with a cable-shaped antenna 20 for transmitting the audio signal radio wave generated by the transmitter circuit 19 inside the unit to the outside.

[0004]

Since the above-mentioned compact television device 15 transmits an audio signal on the radio wave to the outside, it is not necessary to provide an acoustic system such as a speaker in the device 15 itself, and the miniaturization and the reduction are low. It is advantageous that the cost can be reduced, and even if the device 15 itself is provided with a speaker or the like, it is obvious that the sound system such as the FM radio of the car can output the sound better.

However, since the cable-shaped antenna 20 is pulled out from the control unit 17,
For example, when the control unit 17 is installed near the driver's seat of an automobile, it is necessary to crawl the antenna 20 near the shift lever or under the feet, which may be an obstacle. Further, the device form in which the cable-shaped antenna 20 is pulled out from the controller unit 17 and exposed is not preferable in terms of product design.

Therefore, it is conceivable that a cable-shaped antenna 20 for transmitting an audio signal is provided in the video signal transmission cable 18 and integrated with the video signal transmission cable 18.

However, the cable 18 for transmitting the video signal
An electromagnetic shield layer is provided between the signal line portion and the cable sheath so that electromagnetic noise does not enter from the outside. Therefore, if the antenna 20 for the audio signal is simply provided in the cable 18 together with the signal line, the radio wave of the antenna 20 is blocked by the electromagnetic shield layer and the transmission performance cannot be exhibited.

The present invention was created under the above circumstances, and an object thereof is to transmit a cable-shaped antenna for transmitting an audio signal to the outside for transmitting a video signal in a state where the transmission performance can be exhibited. It is to provide a small television device that is integrated with the cable of.

[0009]

In order to achieve the above object, the invention according to claim 1 includes a video monitor, a control unit for generating a video signal and an audio signal, the video monitor and the control unit. A small television device including a cable for transmitting a video signal, the cable having an electromagnetic shield layer covering a signal line portion thereof, and a cable-shaped antenna for transmitting an audio signal from the control unit to the outside of the device. The antenna is extended from the control unit into the video monitor through the inside of the electromagnetic shield layer of the cable.

According to the first aspect of the invention, since the antenna is extended from the control unit into the video monitor through the inside of the electromagnetic shield layer of the cable, the electromagnetic wave emitted from the portion inside the cable of the antenna is generated by the electromagnetic shield layer. Although shielded, the radio waves emitted from the portion extending inside the video monitor are transmitted to the outside through the housing of the video monitor without being shielded. Therefore, a cable-shaped antenna for transmitting the audio signal to the outside,
It can be integrated with a cable for video signal transmission in a state where transmission performance can be exhibited. However, in this case, it is assumed that the housing of the video monitor is made of a material such as plastic that transmits radio waves.

Next, the invention according to claim 2 is a video monitor, a control unit for generating a video signal and an audio signal, and a cable for transmitting a video signal for connecting the video monitor and the control unit. In a small television device including a cable having an electromagnetic shield layer between the signal line portion and a cable sheath, and a cable-shaped antenna for transmitting an audio signal from the control unit to the outside of the device, the antenna is the cable. It is characterized in that it is provided between the electromagnetic shield layer and the cable sheath.

According to the second aspect of the present invention, since the antenna is provided between the electromagnetic shield layer of the cable and the cable sheath, the radio wave emitted from the antenna is not shielded by the electromagnetic shield, and the cable is It is transmitted to the outside through the sheath. Therefore, the cable-shaped antenna for transmitting the audio signal to the outside can be integrated with the cable for transmitting the video signal in a state where the transmission performance can be exhibited.

In this case, since it is not necessary to extend the cable-shaped antenna inside the video monitor, the length of the antenna can be shortened and the manufacturing cost can be reduced as compared with the case of claim 1. Further, it can be applied even when the case of the video monitor is made of a material that shields radio waves.

[0014]

Embodiments of the present invention will be described below. [First Embodiment] FIG. 1 shows a first embodiment of a small television apparatus according to the present invention. This small television device 1 is a vehicle-mounted television, and an image monitor 2 that can be attached to a dashboard of an automobile,
A control unit 3 that receives broadcast radio waves and generates a video signal and an audio signal, and a cable 4 for transmitting a video signal that connects the video monitor 2 and the control unit 3
And a cable-shaped antenna 5 for transmitting an audio signal from the control unit 3 to the FM radio of the automobile.

The video monitor 2 has a plastic housing 6
A liquid crystal display panel 7 and a liquid crystal drive circuit (not shown) are provided therein. Inside the control unit 3, a tuner circuit 8 for receiving a broadcast radio wave to generate a video signal and an audio signal, and a transmitter circuit 9 for transmitting an audio signal from the tuner circuit 8 on an FM radio wave are provided. Has been.

The cable 4 has a plurality of signal lines 10 for transmitting video signals, and an electromagnetic shield layer 12 is provided between the signal line 10 portion and the cable sheath 11. One end of each signal line 10 is connected to the video signal output section of the tuner circuit 8, and the other end is connected to the signal input section of the liquid crystal drive circuit in the video monitor 2.

One end 5a of the antenna 5 is connected to the antenna connection terminal of the transmitter circuit 9. The other end 5b side of the antenna 5 is drawn out to the outside of the control unit 3, and is extended inside the video monitor 2 through the inside of the electromagnetic shield layer 12 of the cable 4 together with the signal line 10. A portion 5aA of the antenna 5 extending in the video monitor 2 is provided along the inner surface of the housing 6.

A compact television set 1 having the above-mentioned structure.
Then, the video signal generated by the tuner circuit 8 of the control unit 3 is input to the liquid layer drive circuit of the video monitor 2 through the signal line 10 of the cable 4. Then, the liquid layer drive circuit drives and controls the liquid crystal display panel 7 according to the input signal, so that a television image is displayed on the display unit.

On the other hand, the audio signal generated by the tuner circuit 8 is sent to the transmitter circuit 9 through the signal line 13 in the control unit 3, and is transmitted from the antenna 5 to the FM.
FM transmitted on radio waves and installed in automobiles
Received by radio.

In this case, the voice signal radio wave emitted from the portion 5B in the cable 4 of the antenna 5 is blocked by the electromagnetic shield layer 12 of the cable 4 and is not transmitted to the outside, but the portion extending in the video monitor 2 is provided. The voice signal radio wave emitted from 5A is transmitted to the outside through the housing 6.

[Second Embodiment] FIG. 2 shows a second embodiment of a small television apparatus according to the present invention. This small television device 14 is a vehicle-mounted television device as in the first embodiment, and most of the components are also common to the device 1 shown in FIG. However, the first embodiment is that a cable-shaped antenna 5 for transmitting a voice wave extracted from the control unit 3 is provided between the electromagnetic shield layer 12 and the cable sheath 11 of the cable 4 for transmitting a video signal. Is different from

That is, as shown in FIG.
In order to protect the signal line 10 and the electromagnetic shield layer 12 inside, a cable sheath 11 made of a flexible insulating material such as rubber is provided on the outermost side, and the cable sheath 11 and the electromagnetic shield layer 12 are provided. Antenna 5 between
Is provided. Since the antenna 5 is provided outside the electromagnetic shield layer 12, the radio wave emitted from the antenna 5 is not shielded by the electromagnetic shield layer 12 and is transmitted to the outside through the cable sheath 11.

In this case, since it is not necessary to extend the antenna 5 inside the video monitor 2, the length of the antenna 5 can be shortened and the manufacturing cost can be reduced as compared with the case of the first embodiment. Further, it can be applied even when the housing 6 of the video monitor 2 is made of a material such as metal that shields radio waves.

According to the above-described embodiment, the cable-shaped antenna 5 for transmitting the sound wave is integrated with the cable 4 for transmitting the video signal, so that the antenna 5 does not get in the way and the design is improved. However, a preferable device configuration can be realized. Further, since the cable-shaped antenna 5 is provided in the cable 4 for transmitting the video signal, the antenna can be prevented from being damaged.

In the above embodiments, the device configuration for receiving the broadcast radio wave and outputting the video and audio signals has been described. However, the current position of the automobile is displayed on the video and audio based on the radio wave sent from the artificial satellite. It goes without saying that the present invention can also be applied to a so-called navigation system that notifies by voice.

[0026]

According to the first aspect of the invention, since the antenna is extended from the control unit into the video monitor through the inside of the electromagnetic shield layer of the cable, the radio wave emitted from the portion inside the cable of the antenna is electromagnetic shield. Although shielded by the layers, the radio waves emitted from the portion extending inside the video monitor are transmitted to the outside through the housing of the video monitor without being shielded. Therefore, the cable-shaped antenna for transmitting the audio signal to the outside can be integrated with the cable for transmitting the video signal in a state where the transmission performance can be exhibited.

According to the invention as set forth in claim 2, since the antenna is provided between the electromagnetic shield layer of the cable and the cable sheath, the radio wave emitted from the antenna is not shielded by the electromagnetic shield, and the cable is It is transmitted to the outside through the sheath. Therefore, the cable-shaped antenna for transmitting the audio signal to the outside can be integrated with the cable for transmitting the video signal in a state where the transmission performance can be exhibited.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a first embodiment of a small television device according to the present invention.

FIG. 2 is a schematic configuration diagram showing a second embodiment of a small television device according to the present invention.

FIG. 3 is a perspective view showing a cross-sectional structure of a cable for transmitting a video signal in the second embodiment of the miniature television set according to the present invention.

FIG. 4 is a diagram showing an example of a conventional small television device.

FIG. 5 is a diagram showing another example of a conventional small television device.

[Explanation of symbols]

 1 small TV device 2 video monitor 3 control unit 4 cable 5 antenna 6 housing 7 liquid crystal display panel 8 tuner circuit 9 transmitter circuit 10 signal line 11 cable sheath 12 electromagnetic shield layer 13 signal line

Claims (2)

[Claims] 1. A video monitor, a control unit for generating a video signal and an audio signal, a cable for transmitting a video signal for connecting the video monitor and the control unit, and an electromagnetic shield layer covering a signal line portion thereof. And a cable-shaped antenna for transmitting an audio signal from the control unit to the outside of the device, wherein the antenna passes from the control unit to the inside of the electromagnetic shield layer of the cable. A small television device, which is extended in the video monitor. 2. A video monitor, a control unit for generating a video signal and an audio signal, and a video signal transmission cable for connecting the video monitor and the control unit, the signal line portion and a cable sheath. A small television device comprising a cable having an electromagnetic shield layer between the cable and a cable-shaped antenna for transmitting a sound signal from the control unit to the outside of the device, wherein the antenna is an electromagnetic shield layer of the cable and a cable sheath. A small television device provided between and.