JPH04112574U - wireless transmitter for indoor tv - Google Patents

Abstract

(57) [Summary] [Purpose] To eliminate the need to connect a power supply line between an indoor wall and a television receiver, and to allow the television receiver to be placed anywhere. [Configuration] TV radio waves received by the outdoor antenna 1 are sent to a transmitter 3 connected to the outdoor antenna 1 via a feeder line 2.
The signal is amplified, converted into a different band for each channel, transmitted, and received by the television receiver 4.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea allows TV radio waves received by an antenna installed outdoors to be transmitted to an indoor TV. The present invention relates to a wireless transmitter for indoor television that transmits data to a receiver.

0002

[Conventional technology]

In order to receive clear images on an indoor TV receiver, it is necessary to receive TV radio waves. antenna must be installed outdoors. This outdoor TV When connecting the antenna to an indoor TV receiver using a feeder line, connect the feeder line to the indoor wall. If exposed, it will spoil the aesthetics of the room. Therefore, conventionally, when constructing a house, it has been In addition to wiring the electric wires, expose the terminal connected to the antenna on a part of the indoor wall. , connect the indoor wall terminal of this antenna and the antenna terminal on the back of the TV receiver to the feeder line. I was trying to connect it by In this way, from the indoor wall to the outdoor antenna By wiring the power supply line between the walls inside the wall, the aesthetics of the room will not be spoiled. That's what I do.

0003

[Problem that the idea aims to solve]

However, the location of the TV receiver at the design stage and the actual use The placement position may not match the TV receiver in such cases. The distance between the imager and the indoor wall terminal may be long, and the distance between the indoor wall terminal and the TV may be long. If you connect the receiver with a power supply line, this power supply line will be exposed on the indoor floor. This creates a problem that spoils the aesthetic appearance. In addition, the layout of other furniture and the relationship with fittings should be considered. In some cases, it may not be possible to easily connect the power cable between the inner wall terminal and the TV receiver. Ru.

0004 The purpose of this invention is to wirelessly transmit and receive TV radio waves between indoor walls and TV receivers. This eliminates the need to connect power lines between indoor walls and TV receivers. , an indoor TV that can supply TV signals to a TV receiver without compromising the aesthetics of the room. The purpose of the present invention is to provide a wireless transmitter for use in television.

[0005]

[Means to solve the problem]

The indoor TV wireless transmitter of this invention is connected to an outdoor antenna, It is characterized by amplifying the TV radio waves received by Tena and transmitting them indoors.

[0006] Converts the TV radio waves received by the antenna into different bands for each channel. It may also be possible to send it by clicking it.

[0007]

[Effect]

In this idea, the TV radio waves received by the outdoor antenna are multiplied by a transmitter. It is transmitted as a wide frame and received by a television receiver. Therefore, indoor Even if the placement location of the TV receiver changes, the TV radio waves will still be transmitted to the TV regardless of the connection of the power supply line. Supplied to the receiver.

[0008] In addition, TV receivers transmit signals using converted bands for each channel at the transmitter. When receiving TV radio waves, the TV radio waves in the band that can be received by an outdoor antenna are I never received it. Therefore, the receiver receives TV signals of the same frequency from different sources. The TV signal is not received at the correct timing, and the TV signal is not received from the receiver. Image defects such as ghosts do not occur on television receivers.

[0009]

【Example】

Figure 1 shows the configuration of an indoor TV wireless transmission and reception system that is an embodiment of this invention. FIG. An antenna 1 is installed on the roof of a house 11. this outdoors A feed line 2 is connected from the installed antenna 1 to the transmitter 3 installed on the indoor wall. has been done. On the other hand, the television receiver 4 installed indoors in the house 11 has a receiver 5. It is equipped. Television waves are transmitted and received between these transmitters 3 and receivers 5. Ru.

0010 Figure 2 shows a block diagram of a transmitter that constitutes a part of the indoor TV wireless transmission and reception system. This is a diagram. The transmitter 3 includes a VHF amplifier 21, a bandpass filter 22, and a controller. It is composed of an inverter 23, an amplifier 24, and an antenna 25. VHF a The amplifier 21 converts the TV radio waves received by the outdoor antenna 1 into frequencies of about 90MHz to 200MHz. Amplify with respect to degree bandwidth. The bandpass filter 22 has frequencies other than the required bandwidth. Cut the wave number range. The converter 23 receives the VH that has passed through the bandpass filter 22. Converts F band radio waves to UHF band. Converted to UHF band by converter 23 The converted radio waves are increased by the amplifier 24 to an antenna output of about several tens of mW. The signal is then transmitted from the antenna 25.

[0011] FIG. 3 is a block diagram of the receiver of the indoor television wireless transmission and reception system. Receiving The transmitter 5 includes an antenna 31, a UHF amplifier 32, and a converter 33. and is connected to the television receiver 4. The receiver 5 receives the UHF signal transmitted from the transmitter 3. Band radio waves are received via the antenna 31. The received radio waves are sent to the UHF amplifier 32. After being amplified by the converter 33, it is converted to the original VHF band. The signal is then input to a high frequency circuit (not shown) included in the television receiver 4.

0012 Figure 4 shows the outdoor antenna of the transmitter in the indoor TV wireless transmission/reception system. FIG. Connect the plug 26 to the tip of the transmitter 3 housing. A coaxial cable 27 provided therein protrudes. This coaxial cable 27 is the aforementioned VHF is connected to the amplifier 21 for use. This plug 26 is attached to the indoor wall surface 41 in advance. By connecting to the wall terminal 42 that is connected to the A transmitter 3 is connected to an outdoor antenna 1 via a line 2 . The above plug 26 is This corresponds to the connection part of the invention described in Section 2. In addition, is the transmitter 3 connected to the power line not shown in the diagram? electricity is supplied from the

[0013] Figure 5 shows how the receiver of the above-mentioned indoor television wireless transmission/reception system corresponds to the television receiver. It is a diagram showing a connection state. A coaxial cable 34 for connection protrudes from the receiver 5. The tip of this coaxial cable 34 is connected to the antenna installed on the back of the television receiver 4. Connect to terminal 51. The coaxial cable 34 is connected to the output section of the converter 33 shown in FIG. By fixing the coaxial cable 34 to the antenna terminal 51, The converter 33 and the high frequency circuit of the television receiver 4 are connected. Above coaxial cable The cable 34 corresponds to the connecting portion of the invention set forth in claim 4. In addition, there is also a receiver 5 (not shown). Receives power from the power line. In this case, the TV receiver 4 is It may be configured such that power is supplied to the receiver 5 only when the power source is turned on.

[0014] FIG. 6 is a diagram showing a configuration in which the receiver is built into a television receiver. U High frequency amplification of the output side of the receiver 5 having the HF amplifier 32 and converter 33 Connect to the input section of circuit 61. As a result, the VH output from the converter 33 After the F-band radio waves are amplified, they are generated by a superheterodyne polar oscillator. The frequency converter 62 converts the signal into an intermediate frequency signal, which is then sent to an audio detection circuit (not shown) and and the video detection circuit. In this way, place the receiver 5 inside the TV receiver 4. By incorporating the receiver 5, the installation space for the receiver 5 can be made unnecessary. Also , power can be supplied to the receiver 5 from the power supply section of the television receiver 4, and This eliminates the need for a separate power supply line.

[0015] Furthermore, it is also possible to have the transmitter 3 built into the wall surface 41 during the construction work of the house. It is. By doing this, the transmitter 3 will not be exposed indoors. No installation space is required.

[0016] In addition, in this embodiment, the television receiver is equipped with a receiver, but the transmitter The channel of the TV receiver is set so that it receives the radio waves of the converted band for each channel. Once you have set up the relationship between the cable and tuner, your TV receiver can be equipped with a simple antenna. All you have to do is get it. Furthermore, the amplification factor of the transmitter is sufficiently high, and the transmitter and television receiver If the distance to the antenna is relatively short, this antenna can also be omitted.

[0017] In addition, the above transmitter only amplifies the television waves received by the outdoor antenna. It may be something.

[0018]

[Effect of the idea]

According to this invention, television radio waves are wirelessly transmitted between a transmitter and a television receiver. No need to connect a power line between the indoor wall and the TV receiver. This has the advantage of allowing you to freely choose where to place the television receiver.

[0019] In addition, a transmitter converts TV radio waves into different bands for each channel and transmits them. If so, the TV receiver will not receive the TV signals received by the outdoor antenna. This means that TV waves of the same frequency may be supplied to the TV receiver at different times. Therefore, image defects such as ghosts do not occur.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a schematic configuration of an indoor television wireless transmitting and receiving system according to an embodiment of the invention.

FIG. 2 is a block diagram showing the configuration of a transmitter of the indoor television wireless transmission and reception system.

FIG. 3 is a block diagram showing the configuration of a transmitter of the indoor television wireless transmission and reception system.

FIG. 4 is a diagram showing a connection state of the transmitter to an outdoor antenna.

FIG. 5 is a diagram showing the connection state of the transmitter to the television receiver.

FIG. 6 is a block diagram showing a connection state when the receiver is built into a television receiver.

[Explanation of symbols]

1-Outdoor antenna 2-Feed line 3-Transmitter 4-TV receiver

Claims (2)

[Scope of utility model registration request] 1. A wireless transmitter for indoor television that is connected to an outdoor antenna, amplifies television radio waves received by the antenna, and transmits the amplified television waves indoors. 2. The indoor television radio transmitter according to claim 1, wherein the television radio waves received by the antenna are converted into different bands for each channel and transmitted.