JP3407288B2 - LNB drive voltage supply device - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention provides a DC voltage.
Relates to a circuit for feeding .

[0002]

2. Description of the Related Art For example, when receiving broadcast radio waves from a broadcasting satellite (BS), a so-called BS tuner and a BS antenna are installed, and a DC drive voltage generated from the BS tuner is down-converted to the BS antenna. Is provided to the BS tuner and the received signal received by the BS antenna and the LNB is supplied to the BS tuner.

By the way, in collective housing such as condominiums and apartments, it is general to adopt a joint reception system in which one joint antenna is installed and the BS antenna is shared.

That is, as shown in FIG. 3, one BS antenna 1 is installed, an LNB 2 is connected to this BS antenna 1, and a reception signal received by the BS antenna 1 and the LNB 2 is connected to a distributor 3. It is adapted to be distributed to a plurality of home BS tuners 4 and output. In FIG. 3, 5 is a television receiver (hereinafter, referred to as TV) connected to the BS tuner 4, and 6 is an electric power used by connecting to a TV 5 such as an Internet terminal or a video game machine which uses direct current as a power source. It is a set-top box as an electronic device.

On the other hand, the BS tuner 4 may be constructed separately from the TV or VCR, or may be built in the TV or VCR. As shown in FIG. 3, reception by the receiving antenna 1 and LNB 2 is performed. The signal is input to the TV 5 via the BS tuner 4, and the image and audio signals are demodulated.

Further, the LNB2 is, for example, an actual Kaihei 5-50.
As described in Japanese Patent Publication No. 841 and the like, it is configured to operate by being supplied with a DC drive voltage, and in general, the BS tuner 4 has a built-in circuit for generating a drive voltage for the LNB 2, so that the BS tuner The direct-current drive voltage generated by 4 is supplied to the LNB 2 via the coaxial cable.

[0007]

However, in the joint reception system as shown in FIG. 3, even if there are a plurality of BS tuners 4, the BS tuner 4 for supplying the drive voltage to the LNB 2 is provided.
Since only one unit is required, BS that supplies the drive voltage to LNB2
For the remaining BS tuners 4 other than the tuner 4, L
The drive voltage to NB2 was not used.

If a power supply device for supplying a drive voltage to the LNB 2 is separately provided, such a situation will occur for all the BS tuners 4. Furthermore, it is not limited to such a joint reception system, but B
Even when a TV with a built-in S tuner and a video deck with a built-in BS tuner are connected and used, the DC voltage generated by one BS tuner is not used and is wasted.

On the other hand, the set top box 6 used by being connected to the TV 5 often uses a direct current as a power source, and normally an AC adapter converts a commercial power source into a direct current to be used as a drive power source. However, if the number of devices used by connecting to the TV 5 increases, there is a shortage of outlets for commercial power sources, which may lead to a so-called "octopus wiring" state, which may lead to an unfavorable situation.

Therefore, the BS tuner 4 which is not used
If the generated voltage can be used as a drive power source for the set top box 6, the above-mentioned "octopus wiring" can be alleviated even a little, which is very preferable as a power source usage situation.

The problem to be solved by the present invention is LN
This is to enable effective utilization of the drive voltage to be supplied to B.

[0012]

In order to solve the above problems, the power supply circuit of the first invention of the present application drives an LNB that generates a driving DC voltage to be supplied to the LNB connected to the receiving antenna. A power supply terminal for inputting a DC voltage from a voltage supply device , the receiving antenna and the LNB.
Signal terminal for receiving the received signal received by the power supply terminal, and an external output terminal for outputting the DC voltage input to the power supply terminal
And for supplying the DC voltage to the external output terminal
The first circuit and the received signal input to the signal terminal are
Output to the power supply terminal, and from the power supply terminal to the signal terminal
A second circuit for cutting off the DC voltage up to.

With such a configuration, the DC voltage to be supplied to the LNB can be output to the external output terminal. Therefore, even when the DC voltage to be supplied to the LNB is not used for driving the LNB, which is the original purpose,
The DC voltage output to the external output terminal can be effectively used. For example, if the outlet of the commercial power supply is in the "octopus wiring" state, the number of outlets used is reduced to "octopus wiring". It becomes possible to ease the condition. In addition, the reception antenna and the reception received by the LNB are
The signal signal is output from the power supply terminal through the second circuit.
Therefore, it is necessary to demodulate the image and audio signals from the received signal.
Is also possible.

In the power supply circuit of the second invention of the present application,
Is a circuit in which the first circuit is connected to the power supply terminal.
And a cathode connected to the external output terminal
A current blocking diode, wherein the second circuit is
Having a capacitor for connecting a terminal and the power supply terminal
It is characterized by

In this way, the first circuit and the second circuit can be simplified.
And it can be constructed at low cost.

Further, in the third invention of the present application , a set-top box driven by the DC voltage is applied to the external output terminal.
Are connected.

By connecting the set top box using DC as a power source to the external output terminal, the DC voltage from the drive voltage supply device is used when the LNB is not used for driving the set top box. Can be effectively used for driving.

Set top box of the fourth invention of the present application
Is provided with the power supply circuit according to claim 1.
And

By doing so, the Internet terminal,
Video game machines, LDs (laser disk drive), etc.
Set-top box connected to a television receiver
By simply connecting the power supply terminal of the integrated power supply circuit to the scan to the drive voltage supply device LNB, set-top boxes
It is possible to obtain a scan of the drive voltage, outlets and A
No C adapter is required. And television
Check that the outlet wiring around the receiver is loose.
It becomes possible to harmonize.

[0020]

[0021]

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to FIGS. However, FIG. 1 is a block diagram, and FIG. 2 is a partial detailed connection diagram.

First, FIG. 1 showing the overall structure will be described. In FIG. 1, 11 is a BS tuner as a drive voltage supply device which is built in a TV or VCR and generates a DC voltage for driving an LNB which will be described later, and 12 is an LNB which is a down converter and is connected to a BS antenna (not shown). A DC tuner is supplied and driven by a BS tuner other than the BS tuner 11 shown in FIG. 1 and other drive voltage supply devices.

Further, in FIG. 1, reference numeral 13 is a power supply circuit, in which a DC voltage generated by the BS tuner 11 is input to the power supply terminal 13a, and the input DC voltage is directly output to the external output terminal 13b and received. A satellite broadcast reception signal received by the antenna and the LNB 12 is input to the signal terminal 13c, and the reception signal input to the signal terminal 13c is output to the power supply terminal 13a.

The power supply circuit 13 includes a reverse current blocking diode 14 and a capacitor 1 as shown in FIG.
5, the anode and cathode of the reverse current blocking diode 14 are connected to the power supply terminal 13a and the external output terminal 13b, respectively, and both ends of the capacitor 15 are connected to the power supply terminal 13a and the signal terminal 13c.

Further, in FIG. 1, reference numeral 17 denotes a set top box as an electric / electronic device using a direct current as a power source,
For example, an internet terminal, a video game machine, an LD, which is used by being connected to a TV, a VCR, or the like not shown
It is composed of a terminal device such as (laser disk drive) and is connected to the external output terminal 13b to be driven.

By providing the power supply circuit 13 as described above, when the DC voltage generated by the BS tuner 11 is not used for driving the LNB, which is the original purpose, B
The DC voltage from the S tuner 11 is supplied to the set top box 17 via the external output terminal 13b of the power supply circuit 13.
To drive it.

On the other hand, the signal terminal 13c of the power supply circuit 13
Is connected to LNB12, BS antenna and LN
Since the satellite broadcast reception signal received by B12 is directly supplied to the BS tuner 11 through the signal terminal 13c and the power supply terminal 13a of the power supply circuit 13, the BS tuner 11 demodulates the satellite broadcast image and sound. You can

Therefore, according to the above embodiment, the BS
When the DC voltage that is generated by the tuner 11 and should be supplied to the LNB 12 is not used for driving the LNB, which is the original purpose, the power supply circuit 13 is provided so that the DC voltage by the BS tuner 11 can be set. Can be effectively used for driving. As a result, what used to require an outlet for connecting an AC adapter for driving the set-top box 17 is no longer required, and the number of outlets that are in the "octopus wiring" state is reduced. It is possible to alleviate the "octopus wiring" condition.

Further, since the satellite broadcast reception signals received by the receiving antenna and the LNB 12 are input to the BS tuner 11 through the power supply circuit 13, the satellite broadcast image and audio signals can be demodulated.

In the above embodiment, the case where the power supply circuit 13 is formed separately from the set top box 17 and connected is described. However, the power supply circuit 13 is connected to an electric / electronic device such as the set top box 17 or the like. Of course, they may be integrated.

In this case, the drive power supply for the electric / electronic equipment can be obtained only by connecting the power supply terminal 13a of the power supply circuit 13 incorporated in the electric / electronic equipment to the BS tuner 11 as the drive voltage supply device. , Outlet or AC
No need for adapters.

In the above embodiment, the set top box 17 used as an electric / electronic device using a direct current as a power source is used by being connected to a TV such as an Internet terminal or a video game machine, a VCR, or the like. As described above, the electric / electronic device that supplies power via the power supply circuit 13 is not limited to this type of set-top box 17. The electric / electronic device applicable to the present invention may be any device that uses a direct current as a power source and can be driven by a direct current voltage generated by a drive voltage supply device such as the BS tuner 11.

Further, it goes without saying that the power supply circuit 13 is not limited to the configuration shown in FIG.

In the above embodiment, the LNB 12
Has been described for the case of being used for broadcasting satellite (BS), the present invention can be implemented in the same manner even when the LNB 12 is used for so-called CS (communication satellite), and the same effect as the above embodiment can be obtained. Obtainable.

Furthermore, the present invention is not limited to the above-described embodiment, and various modifications other than those described above can be made without departing from the spirit of the present invention.

[0037]

As described above, according to the first aspect of the invention, the DC voltage to be supplied to the LNB from the drive voltage supply device can be output to the external output terminal by the power supply circuit. When the DC voltage to be supplied from the drive voltage supply device to the LNB is not used for driving the LNB, which is the original purpose, the DC voltage can be effectively used.

Therefore, for example, when the outlet of the commercial power source is in the so-called “octopus wiring” state, the number of outlets can be reduced by using the drive voltage to be supplied to the LNB. It is possible to relieve the "octopus wiring" condition. Also, the receiving antenna and
And the received signal received by the LNB passes through the second circuit.
Is output from the power supply terminal. Therefore, the image from the received signal
It is also possible to demodulate image and audio signals.

According to the invention described in claim 2,
The first circuit and the second circuit can be configured easily and inexpensively.

According to the invention of claim 3,
When the DC voltage from the drive voltage supply device is not used for driving the LNB, the DC voltage from the drive voltage supply device is connected by connecting the set top box with DC power supply to the external output terminal of the power supply circuit. Set top
It can be effectively used for driving the X.

Further, according to the invention of claim 4, an internet terminal, a video game machine, an LD
Connection to a television receiver such as the disk drive)
The drive voltage of the set-top box can be obtained simply by connecting the power supply terminal of the power supply circuit built into the set-top box to the drive voltage supply device of the LNB, and no outlet or AC adapter is required. become. Then, there is a concept around the television receiver.
It is possible to ease the wiring condition of the octopus legs.

[0042]

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a partial connection diagram of one embodiment.

FIG. 3 is a block diagram of a conventional example.

[Explanation of symbols]

11 BS tuner 12 LNB 13 Power supply circuit 17 Set Top Box

Claims (4)

(57) [Claims] 1. A power supply terminal for inputting a DC voltage from a driving voltage supply device of an LNB for generating a driving DC voltage to be supplied to an LNB connected to a receiving antenna, and the receiving antenna and the LNB for receiving the voltage. Receive
External outputs a signal terminal for inputting a signal, the DC voltage input to the power supply terminal
A lead-out terminal and a first for supplying the DC voltage to the external lead-out terminal
The circuit and the received signal input to the signal terminal are output to the power supply terminal.
And the direct connection from the power supply terminal to the signal terminal.
A second circuit for interrupting the flow voltage, and a power supply circuit. 2. The first circuit is connected to the power supply terminal.
An anode and a cathode connected to the external output terminal
And a second circuit for connecting the signal terminal and the power supply terminal to each other.
The power supply circuit according to claim 1, further comprising a capacitor that operates . 3. The DC voltage is applied to the external lead terminal.
The power supply circuit according to claim 1 or 2, wherein a set top box to be driven is connected. 4. The power supply circuit according to claim 1 or 2.
A set-top box comprising: