JPH04312083A - Bs tuner built-in television - Google Patents

Abstract

PURPOSE:To monitor the desired satellite broadcast from a BS tuner built-in television side as a master television to a slave television by selecting and operating a channel at the slave television side not having a BS tuner. CONSTITUTION:When a receiving channel is selected, for example, to 13CH at a slave television B side, the local oscillation of a UHF/VHF tuner 9 becomes 530MHz, and a local oscillator signal is inputted to an RF output terminals 7 of a Bs tuner 1 through a cable 8. At a master television Al, the above- mentioned local oscillator signal is detected by a frequency detecting circuit 10, the detected signal is inputted to a channel deciding circuit 12 and it is decided that the television B selects 13CH. When the deciding signal is inputted to a BS station selecting circuit 3 and an RF converter 6, at the circuit 3, the satellite first broadcast station selected and switched to the output of the 13CH by the converter 6. Thus, the satellite first broadcast station is monitored through the cable 8 to the television B.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a television with a built-in BS tuner, and more particularly, the present invention relates to a television set with a built-in BS tuner. This relates to a television with a built-in tuner.

0002

2. Description of the Related Art A conventional television with a built-in BS tuner is shown in FIG. Note that herein, a television with a built-in BS tuner will be referred to as a parent television A2, and a television without a BS tuner that is connected to the parent television A2 via a cable will be referred to as a child television B. BS tuner 101 of parent TV A2 is B
S-IF input terminal 102, BS channel selection circuit 103, BS demodulation circuit 104, BS video/audio signal processing circuit 105,
It includes an RF converter 106 for converting into UHF/VHF band channels (for example, 13CH) and an RF output terminal 107.

[0003]The BS-IF signal input to the BS-IF input terminal 102 is tuned by the BS tuning circuit 103, and
The S demodulation circuit 104 demodulates the signal into a BS video/audio signal. The video and audio signals of the BS are processed by the video and audio signal processing circuit 10.
5, and the satellite broadcasting is monitored on the parent television A2 by outputting the NTSC television signal.

On the other hand, the BS video/audio signal is also input to the RF converter 106, and sent from the RF output terminal 107 via the cable 108 to the UHF/VHF tuner 109 of the child TV B which does not have a BS tuner, for example, in the UHF band. No. 1
A converted signal of 3CH is input, and the satellite broadcasting selected by the parent TV A2 is monitored by the child TV B.

[0005]

[Problems to be Solved by the Invention] As mentioned above, conventionally, satellite broadcasting selected by a TV with a built-in BS tuner as a parent TV is monitored by a child TV that does not have a BS tuner. The TV side had the inconvenience of not being able to select satellite channels directly.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a television with a built-in BS tuner that can be used as a parent television to select satellite broadcasting channels on a child television that does not have a BS tuner.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the television with a built-in BS tuner of the present invention has a built-in BS tuner.
Input terminal, BS tuning circuit, BS demodulation circuit, UHF/VH
An RF converter capable of switching F-band channels, a plurality of frequency detection circuits that detect local oscillations from child TVs, detection signals from each frequency detection circuit are input, and a determination signal is input to the BS channel selection circuit and RF converter. A BS tuner equipped with a channel determination circuit and an RF output terminal is provided.

[0008]

[Operation] By selecting a reception channel on the child TV side that does not have a BS tuner, its local oscillation is detected by the frequency detection circuit of the TV with a built-in BS tuner on the parent TV side, and the channel determination circuit selects the channel of the child TV. The satellite broadcasting channel is selected by the BS channel selection circuit.
The RF converter converts the signal into a UHF/VHF band channel signal and inputs it to the child TV.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a television with a built-in BS tuner according to the present invention will be described with reference to the drawings. In the following description, the TV with a built-in BS tuner of the present invention will be referred to as the parent TV A1, and the BS connected to the parent TV A1 via a cable will be referred to as the parent TV A1.
A television without a tuner will be described as child television B. As shown in FIG. 1, the BS tuner 1 of the parent TV A1 includes a BS-IF input terminal 2, a BS channel selection circuit 3, a BS demodulation circuit 4, and a BS video/audio signal processing circuit 5. The RF converter 6 converts the UHF band signal to the UHF/VHF tuner 9 of the child TV B, which does not have a BS tuner, via the RF output terminal 7 and the cable 8.
This is the same as in the conventional example in that the satellite broadcasting is monitored on child TV B.

According to the present invention, the RF converter 6 is configured to be able to switch between, for example, 13CH and 15CH of the UHF band, and the BS tuner 1 includes a local part of the UHF/VHF tuner 9 of the slave TV B. Frequency detection circuit 10 (for example, 530MHz detection) that detects oscillation and 1
1 (for example, 542 MHZ detection) and a channel determination circuit 12 to which the output signals of each of these detection circuits 10 and 11 are input.

[0011] Therefore, when the receiving channel is selected, for example, to CH 13 on the child TV B side, the local oscillation of the UHF/VHF tuner 9 becomes 530 MHZ, and the local oscillation signal propagates through the cable 8 to the BS tuner 1 of the parent TV A1. input to the RF output terminal 7 of.

[0012] In the parent TV A1, the above-mentioned 530M
The HZ local oscillation signal is detected by the 530MHz frequency detection circuit 10, and the detected signal is sent to the channel determination circuit 12.
(there is no output signal from the 542 MHZ frequency detection circuit 11), the channel determination circuit 12 determines that the child TV B has selected CH 13, and the determination signal is sent to the BS channel selection circuit 3 and the RF converter. Enter 6. Select the first satellite broadcast in the BS channel selection circuit 3,
The RF converter 6 switches the output to 13CH.

[0013] Therefore, from the RF output terminal 7
The satellite first broadcast signal converted to 3CH is output, and the satellite first broadcast is monitored by the child television B via the cable 8.

Similarly, when selecting CH 15 on the child TV side, the local oscillation of 542 MHZ is detected by the frequency detection circuit 11, and the channel determination circuit 12 and the RF
The second satellite broadcast is monitored on child TV B via converter 6, BS channel selection circuit 3, and RF output terminal 7.

[0015]

As described above, the television with a built-in BS tuner of the present invention has an RF converter in the BS tuner that can switch channels in the UHF/VHF band, and local oscillation from the child television that does not have a BS tuner. Equipped with multiple frequency detection circuits and channel determination circuits that detect the BS tuner, the desired satellite broadcast can be received from the parent TV with a built-in BS tuner by selecting the channel on the child TV that does not have a BS tuner. It is easy to use and convenient for viewing.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a television with a built-in BS tuner of the present invention.

FIG. 2 is a block diagram of a conventional example.

[Explanation of symbols]

A1 Parent TV 1 BS tuner 2 BS-IF input terminal 3 BS tuning circuit 4 BS demodulation circuit 5 BS video/audio signal processing circuit 6 RF converter 7 RF output terminal 8 Cable B Child TV 9 UHF/UHF tuner 10, 11 Frequency detection circuit 12 Channel determination circuit

Claims (1)

[Claims] [Claim 1] BS-IF input terminal, BS tuning circuit,
BS demodulation circuit, BS video and audio signal processing circuit, UHF
/VHF band channel switchable RF converter,
A plurality of frequency detection circuits for detecting local oscillation from a child TV, a channel determination circuit to which the detection signal of each frequency detection circuit is inputted and a determination signal inputted to the BS channel selection circuit and the RF converter, and an RF output terminal. A television with a built-in BS tuner, characterized by having a BS tuner.