JP5145272B2 - TV signal processor - Google Patents

Description

The present invention relates to a receiving side device provided with a signal processing means for processing a television signal received by an antenna, and transmitted through a single transmission line that is processed by the receiving side device and connected to the receiving side device. The present invention relates to a television signal processing apparatus including a terminal-side device having a power supply circuit that accepts incoming signals and supplies power to the receiving-side device, and more particularly, to energy saving of the television signal processing device.

Conventionally, even for a device that obtains electric power from a commercial power source, it has been considered to realize energy saving of the device by providing a solar cell, for example. As an example, a backflow prevention diode is provided at the output of the rectifier circuit that converts the commercial AC power source into direct current in a primary power supply unit provided with a commercial AC power source and a storage battery charged by the commercial AC power source. A solar battery is provided so that an output voltage is applied via the output voltage, and a drive voltage is generated by receiving a voltage supply from the higher output voltage side of the output voltage obtained by rectifying the commercial AC power supply and the output voltage from the solar battery. There is an uninterruptible power supply system that is configured to do so. For example, in the daytime in fine weather, the output of the solar cell can be sufficiently output, so the drive power is generated using the output voltage from the solar cell. Can save energy.

JP-A-11-0669660

Receiving devices such as TV signal amplifiers that receive and amplify terrestrial digital broadcast signals, satellite converters that receive radio waves from satellites and convert them to intermediate frequency bands, and the like In addition, DC15V is superimposed via a coaxial cable from a terminal-side device such as a power supply or tuner installed on the TV side, and the TV signal amplifier and the satellite converter are driven by this DC15V. When applied to a TV signal processing apparatus and considering to save energy by providing a solar cell in the TV signal processing apparatus, in this case, the solar cell is used in a TV signal amplifier or satellite so that sunlight can be sufficiently obtained. Since it is provided in the vicinity of the converter, the output voltage from the solar cell is DC 15 V superimposed on the coaxial cable (that is, Source supplier to join the direct current voltage) which is converted from commercial AC power supply may be connected to the DC15V flows line at the receiving apparatus side such as a television signal amplifier or satellite converter via a diode for backflow prevention.

Specifically, as shown in FIG. 2, the DC voltage DC15V converted from the commercial AC power supply in the power supply circuit 23 of the power supply 200 as the terminal-side device is the RF input terminal 7 of the power supply 200. From the RF output terminal 4 of the television signal amplifier 100 which is a receiving side device via the distributor 6 and the coaxial cable 5. The input DC 15 V is supplied to the backflow prevention diode 14 via the coil 12 a of the power supply separation filter 12. On the other hand, the output voltage generated by the solar cell 170 is supplied to the diode 19 for preventing backflow. The output of the backflow preventing diode 14 and the output of the backflow preventing diode 19 are connected at a position indicated by 15 in FIG. 2, and the voltages output from both diodes are combined at the position 15. Yes. At least the television signal amplifier via the constant voltage circuit 13 from the higher one of the second output voltage from the solar cell 170 obtained at the position 15 and the first output voltage from the power supply 200. A driving voltage for driving the signal amplifying circuit 11 constituting 100 is output.
The TV signal amplifier 100 configured as described above can sufficiently output the solar cell 170 during daytime in fine weather, and the second output voltage from the solar cell 170 is the first output voltage from the power supply 200. Since a voltage sufficiently higher than the output voltage is obtained, the second output voltage from the solar cell 170 is input to the constant voltage circuit 13. Further, the second output voltage is converted into a drive voltage lower than the second output voltage in the constant voltage circuit 13, and the signal amplification circuit 11 is driven by the drive voltage. In addition, when the output of the solar cell 170 drops and the second output voltage becomes lower than the first output voltage, the first output voltage from the power supply 200 is input to the constant voltage circuit 13 and the constant voltage circuit 13. The signal amplifying circuit 11 is configured to be driven with a driving voltage lower than the first output voltage output from the voltage circuit 13. That is, in this embodiment, it always operates with the output voltage from the solar cell 170, and when it cannot be compensated for with the solar cell 170, it operates with the output voltage from the power supply 200 as the terminal side device. Can be realized.

However, when the circuit configuration as in the prior art is used in the television signal processing apparatus 1 such as the television signal amplifier 100 described above, the following problems can be considered. Since the television signal processing apparatus 1 such as the television signal amplifier 100 generally used for home use and the satellite converter for receiving satellite broadcasts is basically designed to be driven by DC 15 V, the conventional technology is used. In the configuration in which the solar cell 170 is connected in parallel to the output of the rectifier circuit that converts commercial AC power to DC, the output voltage of the solar cell 170 is Unless a voltage higher than DC15V, which is a voltage for driving the television signal amplifier 100, is obtained, the operation with priority to the solar cell 170 cannot be guaranteed. On the other hand, the panel of the solar cell 170 needs to have a corresponding size according to the output power. Therefore, when the solar cell 170 capable of obtaining a high output voltage is selected, the panel size increases, and as a result, the cost increases. There was a problem I said. In addition, the TV signal amplifier 100 and the like are often installed on a roof or the like, and when the panel size becomes large, it becomes necessary to reinforce the panel or strengthen the fixture so that it is not destroyed by wind or the like. There is a problem that the total cost including not only the cost of the product itself but also the total cost increases, as it is necessary to firmly attach it to a support such as an antenna mast, and the ease of installation work is lost. It was.
Therefore, in this application, it was made to solve these problems.
The purpose is to provide a television signal processing apparatus with low energy consumption.
Another object of the present invention is to provide a television signal processing apparatus including a solar cell that can efficiently supply power even in a small size.
Another object is to provide a television signal processing device that can be easily mounted even if it is equipped with a solar cell.
Another object is to provide a small television signal processing apparatus even with a solar battery.

In order to solve the above-described problems, the invention of claim 1 is a terminal-side device including a power supply circuit that receives a television signal transmitted through at least a transmission line and outputs a predetermined voltage to the transmission line. And a power generation means for generating electricity with natural energy different from the predetermined voltage, and a signal processing means for processing and outputting at least the television signal received by the antenna, and the predetermined voltage superposing the transmission line A television signal processing device comprising: an output voltage output from the power generation means; or a receiving side device configured to be driven using one of the voltages,
The receiving side device receives the predetermined voltage and generates a first output voltage generating means that generates a first output voltage lower than the predetermined voltage; and the first output voltage generated by the first output voltage generating means, Means for supplying at least the signal processing means, provided between the first output voltage generating means and the signal processing means, and only in a direction from the first output voltage generating means to the signal processing means. A first drive circuit of the signal processing means comprising: a first current passing means configured to output a first output voltage as a first drive voltage;
In addition, when the power generation means receives an output voltage output at maximum output, the second output voltage generation means generates a second output voltage that is lower than the output voltage and higher than the first output voltage; Means for supplying at least the second output voltage generated by the output voltage generating means to the signal processing means, wherein the second output voltage is applied only in the direction from the second output voltage generating means to the signal processing means. A second drive circuit comprising: a second current passing means for outputting as a second drive signal;
The output of the second current passing means in the second drive circuit is connected to an interconnection point between the first current passing means and the signal processing means in the first drive circuit.

According to a second aspect of the present invention, in the television signal processing device according to the first aspect, the second drive power generation means is configured to include a solar cell that generates power using sunlight as energy.

According to the invention of claim 1, the output power of the power generation means by natural energy can be lowered, and as a result, the power generation means can be reduced in size. Therefore, if this miniaturized power generation means is provided in the television signal processing apparatus, it is possible to suppress an increase in product cost due to energy saving. In the embodiment in which the power generation means and the television signal processing device are separately attached to a support such as an antenna mast, the power generation means can be reduced in size and weight. In addition to being able to have a simple structure for attaching the bracket to the support, the mounting work can be facilitated and the total cost of the product can be reduced.
Furthermore, if the power generation means can be made compact so that the casing containing the TV signal processing device and the power generation means can be provided integrally, the mounting tool is not necessary. The cost can be reduced and the mounting work can be made easier.

According to the invention of claim 2, in the invention of claim 1, the solar cell used in the television signal processing apparatus configured as described above has a higher output power than the solar cell required in the prior art. The size of the panel can be reduced. Therefore, for example, even if the housing of the television signal processing device and the solar battery are integrally provided, the external shape of the television signal processing device does not become too large and the weight does not become too heavy. The mounting bracket that is mounted on the back of the chassis, for example, attached to a support such as an antenna mast, can be used without changing the design. Product cost increases can be suppressed. In addition, the total cost can be greatly reduced by improving workability such as installation work by simply attaching the TV signal processing device to the support.

It is a television signal processing device concerning a 1st embodiment of the present invention, and is a schematic structure figure of a television receiving system when it saves energy using a solar cell. It is a television signal processing device of a prior art, and is a schematic block diagram of a television receiving system when energy saving is performed using a solar battery. This is comparison data of solar cells, which is a comparison between a solar cell corresponding to the present invention and a solar cell adapted to the prior art. It is a perspective view for showing a specific usage example.

A television signal processing apparatus according to the present invention will be described with reference to FIG. In this figure, reference numeral 1 denotes a television signal processing apparatus according to the present invention. The television signal processing device 1 in this embodiment is a device for amplifying a television signal received by an antenna 2, and is connected via a coaxial cable 5 with a television signal amplifier 10 as a receiving side device according to the claims. The power supply device as a terminal-side device according to claim 1, wherein the device is a device for receiving an output signal from the television signal amplifier 10 to be transmitted and supplying power to the television signal amplifier 10. 20
In the embodiment of the present invention, an example in which the television signal amplifier 10 and the power supply unit 20 are used as the television signal processing apparatus 1 has been shown. However, for example, a satellite received by a parabolic antenna instead of the television signal amplifier 10. A satellite converter that receives radio waves from the satellite and converts the frequency to a signal in the intermediate frequency band is used. In addition, the satellite converter accepts the intermediate frequency signal from the satellite converter and supplies power to the satellite converter instead of the power supply 20. Needless to say, the present invention may be applied to a system using a satellite tuner provided with a power supply circuit.

In FIG. 1, reference numeral 2 denotes an antenna for receiving a terrestrial television broadcast such as a terrestrial digital broadcast. A television signal received by the antenna 2 is input from an RF input terminal 3 of a television signal amplifier 10 as a receiving side device. The input television signal is appropriately amplified by a signal amplifier circuit 11 composed of, for example, a high-frequency transistor, and then output from the RF output terminal 4 via the capacitor 12b of the power supply separation filter 22. The signal amplification circuit 11 is the signal amplification means described in the claims.
Then, the television signal output from the RF output terminal 4 of the television signal amplifier 10 is transmitted to the power supply unit 20 that is a terminal side device via the coaxial cable 5. The television signal transmitted through the coaxial cable 5 is input from the RF input terminal 7 of the power supply 20 and output from the RF output terminal 8 through the capacitor 22 b of the power supply separation filter 22.

The power supply 20 converts the commercial AC power obtained by the AC plug 9 into DC15V, which is a DC voltage, in the power supply circuit 23 provided in the power supply 20, and converts the DC15V into a power supply separation filter. 22 is superposed on the RF signal line via the coil 22a and output from the RF input terminal 7. The DC 15V output from the RF input terminal 7 is further superposed on the coaxial cable 5, and the television The signal is supplied to the signal amplifier 10.
The DC 15 V supplied to the television signal amplifier 10 is taken into the television signal amplifier 10 from the RF output terminal 4 through the coil 12 a of the power supply separation filter 12. The DC 15V output from the coil 12a is configured to be output after being converted into a first output voltage lower than DC 15V in the constant voltage circuit 13. Further, the first output voltage is output as a first drive voltage for driving at least the signal amplifier circuit 11 through, for example, a backflow preventing diode 14.
The constant voltage circuit 13 is the first output voltage generating means described in the claims, and the backflow prevention diode 13 is the first current passing means described in the claims. In this embodiment, the first output circuit is a circuit for driving the signal amplifying circuit 11 by the first output voltage generating means and the first current passing means. Yes.

On the other hand, the output voltage obtained by the solar cell 17 as a power generation means using natural energy is converted into a second output voltage lower than the output voltage and higher than the first output voltage in the constant voltage circuit 18. Yes. Further, the second output voltage is output as a second drive voltage for driving at least the signal amplifier circuit 11 through, for example, a backflow preventing diode 19.
The constant voltage circuit 18 is the second output voltage generating means described in the claims, and the backflow prevention diode 19 is the second current passing means described in the claims. In this embodiment, the second output voltage generation means and the second current passage means form a second drive circuit according to claim 2 which is a circuit for driving the signal amplification circuit 11. Yes.

Next, the output of the first drive circuit and the output of the second drive circuit are connected at a position indicated by 15 in the figure, and the first drive voltage and the second drive voltage merge at this position 15. Thus, the higher one of the second drive voltage from the solar cell 17 and the first drive voltage from the power supply 20 obtained at the position 15 is output, and the television signal amplifier is output. Among the ten components, at least the signal amplifier circuit 11 is driven.
That is, the output of the solar cell 17 can be sufficiently output as in the daytime in fine weather, and the second drive voltage from the solar cell 17 is sufficiently higher than the first drive voltage from the power supply 20. When it is obtained, the second drive voltage obtained from the solar cell 17 is input to the signal amplifier circuit 11, and the signal amplifier circuit 11 is driven. Further, when the output of the solar cell 17 drops and the second drive voltage becomes lower than the first drive voltage, the first drive voltage obtained from the power supply unit 20 is input to the signal amplifier circuit 11, The signal amplifying circuit 11 is configured to be driven. By being configured in this way, it always operates with the output voltage from the solar cell 17, and when the power cannot be compensated for by the solar cell 17 due to rain or the like, the output from the power supply 20 which is the terminal side device Energy savings can be realized by operating with voltage.
In the embodiment, the second drive circuit includes the constant voltage circuit 18 as the second output voltage generation unit. However, the constant voltage circuit 18 may be omitted. At this time, the solar cell 17 serves as the second output voltage generating means, but the maximum output voltage of the solar cell 17 may be determined to a value that can correspond to the standard of the signal amplifier circuit 11.

Here, the inventors confirmed and tested solar cells used in the TV signal amplifying apparatus 10 of the present invention shown in FIG. 1 and the conventional TV signal amplifying apparatus 100 shown in FIG. The results will be explained with specific data. FIG. 3 shows comparison data. As shown in this table, comparison is made when the consumption current of the television signal amplifier 10 is 85 mA. In consideration of the voltage drop of the DC 15V superimposed via the coaxial cable 5 and the backflow prevention diode 19 and the like, the solar cell 170 in the prior art is selected to obtain an output voltage of DC 17V at 100% power generation. Therefore, this solar cell 170 requires approximately 1.4 W of output power. When calculating the size of the panel to obtain such output power (however, the panel efficiency is 13 percent), the length x width is 14.5 cm x 14.5 cm (approximately 210 square centimeters) ) Is required.
On the other hand, the solar cell 17 according to the present invention takes 100% power generation in consideration of the first output voltage generated by the first output voltage generation means using the DC 15V and the voltage drop of the diode 13 for preventing backflow. The solar cell 17 requires an output power of about 0.6 W because the output voltage of DC 7 V is sometimes selected. When calculating the size of the panel to obtain such output power (however, the panel efficiency is assumed to be 13 percent), the length × width is 9.4 cm × 9.4 cm (approximately 90 square centimeters). In other words, the panel of the solar cell 17 applicable to the embodiment of the present invention may be approximately 43% of the size of the panel of the solar cell 170 of the prior art.

That is, according to the embodiment of the present invention, the position where the voltage obtained from the solar cell is merged is not merged with the DC voltage output from the rectifier circuit as in the prior art, as already described in detail. In the television signal amplifier 10 of the present invention, the direct current voltage (that is, DC15V) output from the rectifier circuit is provided with a first drive circuit that makes the direct current voltage a lower direct current voltage, while the solar cell 17 Includes a second drive circuit that makes the DC voltage obtained from the solar cell 17 lower than the voltage and higher than the voltage output from the first drive circuit. , The output power of the solar cell can be made lower than the output power of the solar cell corresponding to the prior art by being configured to merge at position 15) in FIG. As a result, it is possible to reduce the size of the solar cell. Therefore, if this downsized solar cell 17 is provided in the television signal amplifier 10 as described above, it is possible to suppress an increase in the cost of the product due to energy saving.
In the embodiment in which the solar cell 17 and the television signal male amplifier 10 are separately attached to a support such as an antenna mast, for example, the solar cell 17 can be reduced in size and weight. The attachment for attaching the solar cell 17 to the support can be made with a simple structure, and the attachment operation can be facilitated.
Furthermore, if the solar cell 17 is downsized so that the casing containing the TV signal amplifier circuit and the solar cell 17 can be integrally provided, the fixture is not necessary. Furthermore, the cost of the product can be reduced and the mounting work can be made easier.

A specific method of using the television signal processing apparatus 1 configured as described above will be described with reference to FIG. In general, television receiver-related devices are often installed on the roof or on the veranda, so a small and lightweight device is desired. This is because if the shape is large or the weight is heavy, it is difficult to install dangerous equipment, and it is necessary to reinforce the support such as the antenna mast. This is because the wage increases and the total cost increases.
For example, as shown in FIG. 4A, when a solar cell 170 is provided for the television signal amplifier 100 attached to the antenna mast 50 to save energy, the solar cell 170 and the television signal amplifier are used. It is desirable to integrally form the housing of 100, but a mounting bracket (not shown) for mounting the television signal amplifier 100 to the antenna mast 50 is provided on the rear surface of the television signal amplifier 100. It is designed to support the signal amplifier 100, and if it is intended to support a large and heavy solar cell 170, it must be able to withstand not only the total weight but also the pressure received by the wind or the like. In order to increase the strength of the mounting bracket, not only a review of the design is necessary, but this also increases the cost. . For this reason, as shown in FIG. 4A, considering a method of separately attaching the solar cell 170 and the television signal amplifier 100 to the antenna mast 50, in this embodiment, a dedicated device for supporting the solar cell 170 is used. The mounting tool 51 is required, which not only increases the cost, but also reduces the efficiency of the installation work. Further, since the antenna mast 50 needs to support the solar cell 170 in addition to the antenna and the TV signal amplifier 100, the strength of the antenna mast 50 is increased, and the fixing means for fixing the antenna mast 50 to the roof or the like is increased. All reviews are necessary.

However, the solar cell 17 provided in the television signal amplifier 10 according to the embodiment of the present invention has a panel size of about 43 percent, which is less than half, compared with the solar cell 170 required in the prior art. Therefore, as shown in FIG. 4B, the outer shape of the television signal amplifier 10 may be formed so that the housing of the television signal amplifier 10 and the solar cell 17 are integrally provided. Therefore, if the circuit configuration according to the embodiment of the present invention is used, a support such as an antenna mast provided on the rear surface of the television signal amplifier 10 is provided. Mounting brackets that can be mounted on can be used with conventional brackets without a new design review, resulting in increased product costs due to energy savings. It can be suppressed. In addition, the installation cost can be improved by simply installing the TV signal amplifier 10 on the support, and the total cost is not significantly increased.

Further, FIG. 4 (c) shows another embodiment of the present invention. In this figure, reference numeral 31 denotes a parabolic antenna that receives satellite broadcasting. In this embodiment, the above configuration is applied to the satellite converter 30 provided in the parabolic antenna 31. This application example is extremely effective in the following points. That is, since the size of the panel of the solar cell 17 can be reduced, the housing of the satellite converter 30 and the solar cell 17 can be integrally provided, for example, as in the case of the television signal amplifier 10. Even so, the outer shape of the satellite converter 30 is not so large as compared with the conventional converter, so that the satellite converter 30 hardly shields the radio wave coming into the parabolic antenna 31 and the C / N of the received signal. It is possible to save energy in the satellite converter 30 without affecting the power. In Japan, since the parabolic antenna 31 is installed in the direction of the southwest, the satellite converter 30 can receive sunlight efficiently, so that the satellite converter 30 is driven well and energy saving can be realized efficiently.

Note that, as exemplified below, the present invention can be implemented by appropriately changing the configuration of each part without departing from the spirit of the present invention.
Although the present invention has shown an example in which the TV signal amplifier 10 and the satellite converter 20 are energy-saving using a solar battery as the TV signal processing apparatus 1, the present invention is not particularly limited to this embodiment. Needless to say, the present invention can be widely applied to the case where energy is saved by using a solar cell in a device driven by obtaining a voltage.
Moreover, although the said Example showed the example which used the solar cell as an electric power generation means, if it produces electric power using natural energy, it may not be a solar cell.

DESCRIPTION OF SYMBOLS 1 ... Television signal processing apparatus, 2 ... Antenna, 3 ... RF input terminal, 4 ... RF output terminal, 5 ... Coaxial cable, 6 ... Distributor, 7 ... RF input terminal, 8 ... RF output terminal, 9 ... AC plug, DESCRIPTION OF SYMBOLS 10 ... Television signal amplifier (reception side apparatus), 11 ... Signal amplifier circuit, 12 ... Power supply separation filter, 12a ... Coil, 12b ... Capacitor, 13 ... Constant voltage circuit, 14 ... Diode for backflow prevention (1st current passage means) ), 15 position, 17 solar cell, 18 constant voltage circuit, 19 reverse current prevention diode (second current passing means), 20 power supply device (terminal side device), 22 power supply separation filter, 22a ... Coil, 22b ... Capacitor, 30 ... Satellite converter, 31 ... Parabolic antenna, 50 ... Antenna mast, 51 ... Fixture.

Claims (2)

A terminal device having a power supply circuit that accepts at least a television signal transmitted through a transmission line and outputs a predetermined voltage to the transmission line, and generates electric power by using natural energy different from the predetermined voltage. Power generation means, and at least signal processing means for processing and outputting a television signal received by the antenna, the predetermined voltage superimposed on the transmission line and the output voltage output from the power generation means, or either A television signal processing device comprising: a receiving device configured to be driven using one voltage;
The receiving side device receives the predetermined voltage and generates a first output voltage generating means that generates a first output voltage lower than the predetermined voltage; and the first output voltage generated by the first output voltage generating means, Means for supplying at least the signal processing means, provided between the first output voltage generating means and the signal processing means, and only in a direction from the first output voltage generating means to the signal processing means. A first drive circuit of the signal processing means comprising: a first current passing means configured to output a first output voltage as a first drive voltage;
In addition, when the power generation means receives an output voltage output at maximum output, the second output voltage generation means generates a second output voltage that is lower than the output voltage and higher than the first output voltage; Means for supplying at least the second output voltage generated by the output voltage generating means to the signal processing means, wherein the second output voltage is applied only in the direction from the second output voltage generating means to the signal processing means. A second drive circuit comprising: a second current passing means for outputting as a second drive signal;
An output of the second current passing means in the second drive circuit is configured to be connected to an interconnection point between the first current passing means and the signal processing means in the first drive circuit. TV signal processing device.
  The television signal processing apparatus according to claim 1, wherein the second output voltage generation unit includes a solar battery that generates electric power using sunlight as energy.

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