JPH02908B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a television signal receiving apparatus that changes the direction of a receiving antenna depending on a receiving channel.

If there are many transmitting antennas for a TV broadcasting station, each at a different angle from the receiving antenna, if you try to receive TV broadcasts from all the stations with one receiving antenna, you will have to deal with each receiving channel individually. It is necessary to point the receiving antenna in the direction of the broadcasting station's transmitting antenna, which is extremely troublesome.

Therefore, in the past, a motor was attached to the mounting shaft of the receiving antenna, and the motor was rotated by an antenna angle control device placed near the television receiver, so that the direction of the transmitting antenna of the broadcasting station corresponding to the receiving channel was adjusted. The receiving antenna was oriented to ensure good reception.

However, with this method, it is necessary to change the direction of the receiving antenna for each receiving channel, which is extremely troublesome, especially for television receivers that allow the selection of receiving channels using a remote control. There is a problem in that the true value of the remote control method cannot be demonstrated.

The present invention has been made in view of the above, and its purpose is to simply specify a receiving channel of a television receiver and direct the receiving antenna in the direction of the transmitting antenna of the broadcasting station corresponding to that receiving channel. To provide a television signal receiving device with greatly improved operability.

Examples of the present invention will be described below. 1st
The figure shows a block diagram of one embodiment of the television signal receiving device, in which 1 indicates a tuning section that generates a signal to select a specific reception channel based on touch button operation or remote control transmitter operation. , 2 generate a tuning voltage and tuner 3
The channel preset circuit sent to the

This channel preset circuit 2 includes switching elements 4 ₁ to 4 ₁₂ that are selectively turned on in response to a tuning signal from the tuning section 1, and a variable tuning voltage preset that can preset the tuning voltage depending on the position of the sliding contact. Resistors 5 ₁ to 5 ₁₂ and switching diodes 6 ₁ to 6 to extract the tuning voltage.
₁₂ , and a voltage +V is applied to each of the variable resistors 5 ₁ to 5 ₁₂ via corresponding switching elements 4 ₁ to 4 ₁₂ connected in series.

Reference numeral 7 indicates an angle preset circuit which generates an angle signal for determining the direction of the receiving antenna and sends it to the comparator 11. This angle preset circuit 7 includes switching elements _{8 1} to _{8 12 (} that is, the same variable resistors 9 ₁ to _{9 12} for angle voltage presetting, which can preset the angle voltage depending on the position of the sliding contact; and switching elements for extracting the angle voltage. diodes 10 ₁ to 10 ₁₂
A voltage +V is applied to each of the variable resistors 9 ₁ to 9 ₁₂ via corresponding switching elements 8 ₁ to 8 ₁₂ connected in series.

Reference numeral 12 denotes a drive circuit, which includes an outdoor motor 14 for rotating the antenna, which rotates the direction of the receiving antenna 13 in response to a control signal from the comparator 11, and rotates the same angle as the motor 14 in synchronization with the outdoor motor 14. It functions to rotate and drive an indoor motor 15 for antenna angle detection of the same type. Note that the outdoor motor 14 and the indoor motor 15 are AC single-phase reversible motors, and therefore their power supply lines have three lines: a common line, a line for forward rotation, and a line for reverse rotation. used. 16 is an angle detector that detects the rotation angle of the indoor motor 15 (corresponding to the angle at which the receiving antenna 13 faces);
It consists of a rotary variable resistor, etc.

In the above, for example, the case of receiving the first channel will be explained. In this case, for example, the sliding contact of the variable resistor ₅₁ of the channel preset circuit 2 is adjusted to preset the tuning voltage for the first channel, and at the same time, the tuning voltage for the first channel is preset. The sliding contact of the variable resistor ₉₁ of the angle preset circuit 7 is adjusted to preset the angle voltage so that the receiving antenna 13 faces in the direction of the transmitting antenna of the first channel broadcasting station. The same applies to the second channel and below.

Now, assume that the preset angular voltage of the first channel is a voltage corresponding to, for example, 30 degrees in the positive (clockwise) direction with respect to the angle of the receiving antenna 13 of the second channel.

At this time, the channel selection unit 1 selects the channel from the second channel to the first channel.
When a channel is selected, switching element ₄₁ is turned on in channel preset circuit 2,
A tuning voltage for the first channel is output to the tuner 3, and in the angle preset circuit 7, the switching element ₈₁ is turned on, and an angle voltage corresponding to 30 degrees in the positive direction is output from the second channel.

Therefore, the comparator 11 generates a voltage for positive direction rotation, which is input to the drive circuit 12 and is applied to the outdoor motor 14.
and rotates the indoor motor 15 in the forward direction. This rotation continues until the rotation reaches 30 degrees in the positive direction, and at the point when the rotation reaches 30 degrees in the positive direction, the comparator 11 outputs an output voltage that stops the rotation, and the outdoor motor 14 and the indoor motor 15 stop. As a result, the receiving antenna 13 changes to a state in which it is oriented at an angle of 30 degrees more in the positive direction than in the case of the second channel. The opposite is true in the negative direction.

In the embodiment described above, the channel preset circuit 2 and the angle preset circuit 7 are simultaneously selected by the channel selection section 1, but the switching elements 4 ₁ to 4 of the channel preset circuit 2 Based on the ON operation of ₁₂ , the switching element 8 of the angle preset circuit 7 is
It is also possible to make it so that ₁ to 8 ₁₂ are turned on.

FIG. 2 shows an example of the switching element 4 ₁ of the channel preset circuit 2.
The switching element ₈₃ of the angle preset circuit 7 is turned on in conjunction with the ON operation of any one of 4 to ₄ .
Similarly, the switching element ₈₂ is turned on in conjunction with the on operation of any of the switching elements ₄₅ to ₄₈ ,
Further, the switching element 8 ₁ is turned on in conjunction with the turning-on operation of any one of the switching elements 4 ₉ to 4 ₁₂ .

There can be as many broadcasting stations as there are channels, but the transmitting antennas of those broadcasting stations are concentrated in a certain area, for example, in the case of Tokyo, several stations have transmitting antennas installed at Tokyo Tower. It is often buried. The embodiment shown in Figure 2 assumes that the transmitting antennas are concentrated in three locations.
In this way, the number of presets is reduced, so the angle preset circuit 7 is simplified.

Furthermore, it goes without saying that the outdoor motor and the indoor motor can be similarly implemented not only in a 1:1 relationship but also in a proportional relationship.

As described above, according to the present invention, the direction angle of the receiving antenna can be preset, so that when selecting a channel, the direction of the transmitting antenna of the broadcasting station of the selected channel can be set simply by the channel selection operation. The receiving antenna is now automatically oriented, greatly improving operability compared to the conventional case, and is particularly suitable when channel selection is performed using a remote control transmitter. In addition, since the antenna angle detection indoor motor synchronized with the antenna rotation motor can detect the angle in the direction in which the receiving antenna is facing, there is no need for a feedback signal from the antenna rotation motor. Another feature is that the number of signal lines for the antenna rotation motor is reduced.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the surroundings of the tuning section and the receiving antenna drive circuit of a television signal receiving device according to one embodiment of the present invention, and FIG. 2 is a block diagram showing the surroundings of a similar tuning section of another embodiment. It is a circuit diagram. DESCRIPTION OF _{SYMBOLS 1...Tuning section, 2...Channel preset circuit, 3...Tuner, 41-412...Switching element, 51-512 ... Variable resistor} , _{61-612 ...}
...Diode, 7...Angle preset circuit, 8 ₁
~8 ₁₂ ... Switching element, 9 ₁ ~ 9 ₁₂ ... Variable resistor, 10 ₁ ~ 10 ₁₂ ... Diode, 11...
Comparator, 12... Drive circuit, 13... Receiving antenna, 14... Outdoor motor, 15... Indoor motor,
16... Angle detector.

Claims (1)

[Claims] 1. A television signal receiving device configured to change the direction of a receiving antenna according to a reception channel, comprising: an antenna rotation motor for changing the direction of the reception antenna; A channel selection device for a television receiver having a plurality of preset means each including an antenna angle detection motor that rotates by the same angle as the antenna rotation motor, an angle detector that detects the rotation angle of the antenna angle detection motor, and a variable resistor. an angle preset circuit that selects one of the preset means in conjunction with an operation and generates an angle signal for determining the direction of the receiving antenna; and an angle signal from the angle preset circuit and an angle from the angle detector. compare the signals,
A television comprising: a comparator that outputs the comparison signal to both of the motors, and the angle of orientation of the receiving antenna is automatically set based on the output of the comparator. Jiyoung signal receiving device.