JP5214308B2 - Optical receiver - Google Patents

Description

    The present invention relates to an optical receiver that receives an optical signal and converts it into an electrical signal, and more particularly to an indoor receiver.

  Conventionally, as an optical receiver disposed indoors, there is one disclosed in Patent Document 1, for example. This optical receiver draws an optical cable into the housing, converts the optical signal transmitted by the optical cable into a high-frequency signal by the optical receiver, and supplies it to the set top box or television receiver via the output terminal provided in the housing To do. The housing is attached to the wall surface in the house. In addition to such optical receivers, there are optical receivers that are installed on a desktop or the like.

JP-A-2005-25094

  According to the technique of Patent Document 1, the housing of the optical receiver must be attached to the wall surface of the house, and the installation work is required. In addition, the optical cable must be drawn into the housing and connected to the optical receiver, and the connection work is also troublesome. Also, in the stationary type optical receiver, the optical cable has to be drawn into the casing and connected to the optical receiver, and the connection work is troublesome as in the case of the wall-mounted casing of Patent Document 1.

  It is an object of the present invention to provide an optical receiver that facilitates installation work of a casing and connection work for supplying an optical signal.

An optical receiver of one embodiment of the present invention includes an optical terminal that receives an optical signal modulated with a high-frequency information signal including a television broadcast signal and an emergency notification signal, and the optical signal received at the optical terminal at the time of power feeding. An optical-electrical conversion means for converting into a converted high-frequency information signal, an electrical signal terminal for outputting the converted high-frequency information signal from the optical-electrical conversion means, and an emergency notification signal output terminal for outputting the emergency notification signal, Have. The photoelectric conversion means is also configured to output the emergency notification signal when there is no power supply, and the emergency notification signal output terminal is provided with a switching means for the converted high frequency signal from the photoelectric conversion means during the power supply. The emergency notification signal is supplied from the photoelectric conversion means via the switching means that is supplied through the switching means when the power is not supplied. The photoelectric conversion means and the switching means are provided in a housing. The housing has a second surface in surface contact with a first surface of a wall surface terminal including an optical adapter to which the optical signal is supplied, and a third surface opposite to the second surface, in a state where the first and second surfaces are in surface contact, so that the light terminal is connected to the optical adapter, is projected to the light terminals on the first side from the second surface, the third The electric signal output terminal and the emergency notification signal output terminal are provided on the surface.

  In the optical receiver configured as described above, the optical terminal is connected to the optical adapter in the wall surface terminal by bringing the second surface of the housing into surface contact with the first surface. Therefore, it is not necessary to connect the optical cable connected to the optical adapter of the wall terminal to the optical terminal, and the optical receiver can be installed at the same time.

An optical receiver according to another aspect of the present invention includes an optical terminal, an optical-electrical conversion means, an electrical signal terminal , an emergency notification signal output terminal, and a switching means in the casing, as in the above aspect. , further the light - even when the power supply unit for the electrical converting means includes. The housing includes a second surface in surface contact with a first surface including an optical adapter supplied with the optical signal at the wall surface terminal and a power outlet, and a third surface opposite to the second surface. have. The second surface is approximately the same size as the first surface. In a state where the first and second surfaces are in surface contact, the second terminal is connected so that the optical terminal is connected to the optical adapter and the power plug connected to the power source is connected to the power outlet. The optical terminal and the power plug protrude from the first surface to the first surface side, and the electrical signal output terminal and the emergency notification signal output terminal are provided on the third surface.

  Even in the optical receiver of this aspect, the installation work of the casing and the connection work for supplying the optical signal can be performed at the same time as the optical receiver of the above aspect. Moreover, since the power supply unit is operated by connecting the power plug to the wall outlet, there is no need to pull out the power cord with a plug to supply commercial AC power to the power supply unit from the housing. In addition to reducing the space, it is not necessary to connect the power cord to a wall outlet.

  In any one of the above aspects, the housing includes a transmission signal and reception signal terminal for bidirectional communication, and a transmission signal supplied from the terminal is converted into an optical transmission signal and supplied to the optical terminal. Electro-optical conversion means; and optical-electric conversion means for converting the optical reception signal supplied from the optical terminal into the reception signal for bidirectional communication and supplying the received signal to the transmission signal and reception signal terminal. It can also be an optical transceiver.

  With this configuration, bidirectional communication using an optical signal can also be performed by this optical transceiver.

  As described above, according to the present invention, the installation work of the optical receiver casing and the connection work for supplying the optical signal can be performed simultaneously, and the installation work of the optical receiver can be greatly simplified. it can.

  As shown in FIG. 1, the optical receiver according to the first embodiment of the present invention is used with a wall surface terminal 2 provided on a wall surface of a house. The wall surface terminal 2 has a rectangular plate 6 slightly protruding from the wall surface 4. An optical adapter 8 is provided on the first surface, for example, the main surface 7 of the plate 6 as shown in FIG. An optical fiber (not shown) is connected to the optical adapter 8, and a high frequency information signal, for example, an optical signal modulated by a television broadcast signal and an FM broadcast signal is transmitted through the optical fiber. When a situation requiring emergency notification occurs, an emergency notification signal is also used as a high-frequency information signal. In this case, light modulated by the television broadcast signal, the FM broadcast signal, and the emergency notification signal is used. A signal is supplied to the optical adapter 8. An optical signal for data communication such as the Internet is also transmitted and received via the optical adapter 8 via an optical fiber.

  The optical receiver of the first embodiment has a housing 10. The housing 10 is configured in a substantially rectangular parallelepiped shape, and the second surface, for example, one surface 10a of the housing 10 is approximately the same size as the main surface 7 of the plate 6, for example, its length and width slightly. It is formed in the same size except that the dimension is short. The surface 10 a of the housing 10 is configured to be in surface contact with the main surface 7 of the plate 6.

  In a state where the surface 10 a of the housing 10 is in surface contact with the main surface 7 of the plate 6, an optical terminal 12 protrudes outward from the surface 10 a so as to be connectable to the optical adapter 8. The optical terminal 12 is preferably made of, for example, metal and has a large rigidity so that the weight of the housing 10 can be supported while being connected to the optical adapter 8.

  On the surface 10b opposite to the surface 10a of the housing 10, as shown in FIG. 2 (b), an electrical terminal, for example, an output plug 14 for television broadcasting and FM broadcasting, and for FM broadcasting and emergency broadcasting are used. The output connector 16 is arranged side by side. A data communication terminal, for example, a LAN port 18 is provided above the output plugs 14 and 16.

  In this optical receiver, a circuit as shown in FIG. In other words, the optical receiver has a photoelectric conversion means, for example, a photodiode circuit 20. The photodiode circuit 20 converts the optical signal supplied from the optical terminal 12 into a converted high-frequency information signal. The television broadcast signal and FM broadcast signal in the converted high-frequency information signal are amplified by cascaded amplifiers 22 and 24, and then supplied to the output plug 14 for television broadcast and FM broadcast.

A branching unit, for example, one branching unit 26 is provided between the amplifiers 22 and 24, and the television broadcast and FM broadcast signals branched from the branching terminal are supplied to one contact 28a of the changeover switch 28. Has been. In addition to the contact 28a, the changeover switch 28 has a contact 28b and a contact 28c connected to one of the contacts 28a and 28b. The contact 28c is connected to the output plug 16 for FM broadcast and emergency broadcast. Has been. Since the emergency notification signal is also an FM signal, the emergency notification and FM broadcast can be heard by connecting an FM receiver to the output plug 16. The photodiode circuit 20 is configured to be able to output an emergency notification signal and an FM broadcast signal even in a non-powered state, and its output is output to the contact 28b. The contact 28c of the changeover switch 28 is normally switched to the contact 28a side, and an emergency notification signal and an FM broadcast signal are generated at the output plug 16. When the power supply from the power supply unit 34 is cut off, for example, when a power failure occurs due to an emergency such as an earthquake, the contact 28c of the changeover switch 28 is automatically switched to the contact 28b side, and an emergency notification signal or FM broadcast is sent. A signal is generated at the output plug 16. Therefore, it is possible to listen to emergency notifications and FM broadcasts even during a power failure.

  In addition, a communication unit 30 connected to the LAN port 18 is provided in the housing 10. The communication unit 30 receives a transmission signal transmitted from a communication terminal connected to the LAN port 18, such as a personal computer, and transmits it to an optical-electrical conversion unit / electrical-optical conversion unit, such as a PD / LD circuit 32. Here, the optical signal is modulated with the transmission signal to generate a transmission optical signal, which is supplied to the optical terminal 12 and transmitted to, for example, a provider. The received optical signal from the provider is supplied from the optical terminal to the PD / LD circuit 32, where it is converted into a received signal, and supplied to the personal computer via the communication unit 30 and the LAN port 18.

  A power supply unit 34 that supplies operating power to the PD circuit 20, the amplifiers 22 and 24, the communication unit 30, and the PD / LD circuit 32 is provided outside the housing 10. As shown in FIG. 1, the power supply unit 34 is connected to a commercial AC power source by connecting the plug 34 a to an indoor power outlet, and converts it into a direct current. The operating power converted into direct current is supplied to each circuit described above via the cable 36.

  In the optical receiver configured as described above, the surface 10 a of the housing 10 is in surface contact with the main surface 7 of the plate 6, and the optical terminal 12 is connected to the optical adapter 8. Thereby, the installation of the housing 10 and the connection of the optical terminal 12 to the optical adapter 8 are performed simultaneously. Thereafter, the output connector 14 is connected to the television receiver, the output connector 16 is connected to the FM receiver, and the LAN port 18 is connected to the personal computer. In addition, the optical receiver operates by connecting the plug 34a of the power supply unit 34 to an indoor power outlet.

  In the optical receiver according to the second embodiment of the present invention, when a power outlet 36 is provided below the optical adapter 8 on the main surface 7a of the plate 6a of the wall surface terminal 2a as shown in FIG. Corresponding. A power plug 38 is provided below the optical terminal 12 on the main surface 10 a of the housing 10. When the main surface 10a is brought into surface contact with the plate surface 7a, the power plug 38 is arranged so that the optical terminal 12 is connected to the optical adapter 8 and the power plug 38 is connected to the power outlet 36. Yes.

  A power supply unit corresponding to the power supply unit 34 shown in FIG. 3 is provided in the housing 10, whereby operating power is supplied to each circuit of FIG. 3. Since other configurations are the same as those of the optical receiver of the first embodiment, detailed description thereof is omitted.

  The optical receiver according to the third embodiment of the present invention is supplied with operating power from a television receiver 40 as shown in FIG. That is, the television receiver 40 has a built-in BS / CS digital tuner, and has an input terminal 40b for BS / CS digital broadcast signals in addition to the input terminal 40a for television broadcast signals in the UHF band and the VHF band. A DC voltage of +15 V is output from either one of the terminals 40a and 40b, and is connected to the output connector 14 via energizing distribution means, for example, a two distributor 42. The + 15V DC voltage is supplied to the amplifiers 22 and 24, the communication unit 30, and the PD / LD circuit 32 through the high-frequency blocking coil 44 to operate them. The amplifiers 22 and 24 can amplify UHF band and VHF band television broadcast signals and BS / CS digital broadcast signals, and the output of the amplifier 24 is supplied to the output connector 14 via the DC blocking coil 46. The two distributors 42 supply the television receiver 40 to the UHF band and VHF band television broadcast signal input terminal 40a and to the BS / CS digital broadcast signal input terminal 40b. Since other configurations are the same as those of the optical receiver of the first embodiment, detailed description thereof is omitted. With this configuration, it is not necessary to provide the housing 10 corresponding to the power supply unit 34 of the optical receiver in the first embodiment, and the optical receiver can be installed in a space-saving manner.

  In each of the above-described embodiments, the LAN port 18, the communication unit 30, and the PD / LD circuit 32 are provided. However, in some cases, these are not necessary. In each of the above embodiments, the output plug 16 and the changeover switch 28 are provided so as to receive the emergency notification signal. However, these may be unnecessary depending on circumstances. In the first embodiment, the power supply unit 34 pulls the power cord 36 directly into the housing 10. However, a connector is provided at the tip of the power cord, and a connector connectable to the connector is provided in the housing 10. It is also possible to supply the operating power from the connector of the body 10 to each circuit in the housing 10.

It is a side view which shows the connection to the wall surface terminal of the optical receiver of the 1st Embodiment of this invention. FIG. 2 is a front view of a wall surface terminal of FIG. 1 and a rear view of the optical receiver of FIG. 1. It is a block diagram of the optical receiver of FIG. It is a side view which shows the connection to the wall surface terminal of the optical receiver of the 2nd Embodiment of this invention. It is a front view of the wall surface terminal of FIG. It is a block diagram of the optical receiver of the 3rd Embodiment of this invention.

Explanation of symbols

2 Wall terminal 8 Optical adapter 7 Main surface of plate (first surface)
10 Housing 10a Housing surface (second surface)
12 Optical terminal 14 Output connector (electric signal terminal)
20 PD circuit (photo-electric conversion means)

Claims (3)

An optical terminal for receiving an optical signal modulated with a high-frequency information signal including a television broadcast signal and an emergency notification signal ;
Opto-electric conversion means for converting the optical signal received at the optical terminal into a converted high-frequency information signal at the time of feeding ,
An electrical signal terminal for outputting the converted high-frequency information signal from the photoelectric conversion means ;
An emergency notification signal output terminal for outputting the emergency notification signal;
And the photoelectric conversion means is configured to output the emergency notification signal when no power is supplied, and the emergency notification signal output terminal receives the converted high-frequency signal from the photoelectric conversion means during the power supply. The emergency notification signal can be output from the photoelectric conversion means through the switching means that is supplied via the switching means and is switched when the power is not supplied.
The photoelectric conversion means and the switching means are provided in a housing,
The housing has a second surface in surface contact with a first surface of a wall surface terminal including an optical adapter to which the optical signal is supplied, and a third surface opposite to the second surface , In a state where the first and second surfaces are in surface contact, the optical terminal is projected from the second surface to the first surface side so that the optical terminal is connected to the optical adapter, and a third An optical receiver provided with the electrical signal output terminal and the emergency notification signal output terminal on a surface . An optical terminal for receiving an optical signal modulated with a high-frequency information signal including a television broadcast signal and an emergency notification signal ;
Opto-electric conversion means for converting the optical signal received at the optical terminal into a converted high-frequency information signal at the time of feeding ,
A power supply for the photoelectric conversion means;
An electrical signal terminal for outputting the converted high-frequency information signal from the photoelectric conversion means;
An emergency notification signal output terminal for outputting the emergency notification signal;
And the photoelectric conversion means is configured to output the emergency notification signal when no power is supplied, and the emergency notification signal output terminal receives the converted high-frequency signal from the photoelectric conversion means during the power supply. The emergency notification signal can be output from the photoelectric conversion means through the switching means that is supplied via the switching means and is switched when the power is not supplied.
The photoelectric conversion means, the switching means and the power supply unit are provided in a housing,
A second surface that is in surface contact with a first surface of a wall surface terminal including an optical adapter to which the optical signal is supplied, and a power outlet, and a third surface opposite to the second surface, The optical terminal is connected to the optical adapter and the power plug connected to the power supply unit is connected to the power outlet in a state where the body has the first and second surfaces in surface contact. as such, the optical terminal and the power supply plug from the second surface is projected on the first surface side, the electrical signal output terminal and the emergency notification signal output terminal and is provided with an optical receiver to a third aspect . 3. The optical receiver according to claim 1 , wherein the casing includes a transmission signal and a reception signal terminal for bidirectional communication, and a transmission signal supplied from the terminal is converted into an optical transmission signal. Electrical-optical conversion means for supplying to the terminal; and optical-electrical conversion means for converting the optical reception signal supplied from the optical terminal into the reception signal for bidirectional communication and supplying it to the transmission signal and reception signal terminal And an optical transceiver.

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