JPH02122783A - Television receiver with built-in satellite broadcast receiver - Google Patents

Abstract

PURPOSE:To prevent wasteful energy consumption by always stopping the operating of a BS receiver except for a case in which a signal by means of the BS is selected when a TV/BS switch is changed-over to a TV interlocking mode. CONSTITUTION:When a TV/BS switch S1 is set at a TV interlocking mode 26, and a power source switch 3 is turned on to operate a TV power source part 2, the power source part 2 feeds a power source to each circuit other than a BS receiving part 9. A BS power source part 12 feeds the power source to the receiving part 9 by selecting the output of the receiving part 9 by means of an input change-on switch S2. Next, when the switch S1 is changed-over to a BS turning-over mode 27, the power source part 2 is turned on/off by the operation of the switch 3. The power source part 12 is always turned on according to the command of a microcomputer 1 based on the selection of the switch S1 regardless of the turning-on/off of the power source part 2, and feeds the power source to the receiving part 9. Thus, the wasteful power consumption is prevented, and an interfering radio wave from the receiving part 9 is prevented from entering into a TV broadcast or the video signal of a video input.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] This invention relates to a television receiver incorporating a satellite broadcast (BS) receiving device.

[Prior Art] A television receiver with a built-in satellite broadcasting (BS) receiving device is
As shown in the partially omitted block diagram of the electrical circuit shown in Figure 2,
A television receiver that has both a TV receiving section 8 for receiving TV broadcasts and a BS receiving section 9 for receiving BS,
Video signal 22 from TV broadcasting and video signal 2 from BS
3 and the video signals 24 and 25 inputted from the video input terminals 10 and 11 are switched and selected by the input changeover switch S2 based on the command of the microcomputer 31, and the selected video signal 21
is coupled to the CRT 5 via the video circuit 4 for display, and the same video signal is output from the video output terminal 7 via the buffer 32, and the video signal 23 from the BS is selected by the manual changeover switch S2, for example. A VTR without a BS reception function was connected to the video output terminal to record video signals from the BS.

[Problems to be solved by the invention] However, while receiving TV broadcasts, the BS receiver unit is powered on even though it does not need to operate, and the video output terminal is connected to a CRT.
Since only the video signal that is being displayed is output, so-called "back recording"
(Meaning to record the video signal of a counter program that is different from the projected screen)
When recording BS video signals from the video output terminal (automatically recording while you are away or sleeping by setting a recording reservation), the power is turned on even to parts that are not necessary for BS reception. While recording the signal, the receiving channel, audio mode (TV audio/independent audio mode, main audio/sub audio mode when broadcasting in two languages), etc. could be changed by careless operation.

[Means for Solving the Problems] In order to solve these problems, the present invention provides a television receiver having a built-in BS receiving device with two modes: a first position "TV linked" mode and a second position " A TV/BS switch is provided to switch between 'BS on' mode and 'BS on' mode.
When the S switch is changed to the "TV interlocking interlocking mode", only when the input selector switch selects a signal from BS, power is supplied to the BS receiving device to operate it, and the TV/B
When the S switch is switched to the "'BS on" mode, the output selector switch is changed to always output the BS video signal and audio signal to the video output terminal, and the BS
A television receiver with a built-in BS receiver is configured so that the reception channel and audio mode of the receiver are fixed.

[Operation: By the above-mentioned means, the TV/BS switch is set to "TV interlock".
mode, the operation of the BS receiver will be stopped except when a BS signal is selected with the input selector switch, and if the TV/BS switch is switched to "BS on" mode, the output terminal for video, etc. In addition, the BS always outputs video and audio signals with fixed reception channels and audio modes.

[Example code] Embodiments of the present invention will be described based on the drawings.

FIG. 1 is a block diagram of an electrical circuit of a television receiver incorporating a satellite broadcast (BS) receiving device, with some parts omitted.

In the same figure, the TV/BS switch S1 is in the first position, "TV interlock mode 26", and in the second position, "BS
This is a switch for switching between ON mode 27, and the microcomputer 1 captures whether the switch S1 has selected 0 potential on the "TV interlocking" mode 26 side or VB potential on the "BS on" mode 27 side. , Based on the selection, the microcomputer sends commands to various locations described below.

The command can also be sent based on operation of a remote control or a television receiver.

Set the TV/BS switch S1 to "TV interlock mode 26"
The electrical operation when this happens will be explained.

Turn on the power switch 3 connected to the TV power supply section 2 to turn on the TV.
When the power supply unit 2 is operated, the TV power supply unit supplies power to each circuit other than the BS reception unit to enable operation, and the video signal 21 manually input via the input changeover switch s2 is passed through the video circuit 4. It is connected to CRT5 and displayed.

The BS power supply section 12 is turned on based on a command issued by the microcomputer 1 when the input selector switch s2 selects the output of the BS reception section 9, and supplies power to the BS reception section 9 to become ready for operation. do.

The input changeover switch S2 performs a switching operation in response to a command issued by the microcomputer l based on the operation of a remote control (not shown), etc., and is connected to each fixed piece of the input changeover switch S2. The video signal 22 from the signal-processed TV broadcast, the video signal 23 from the BS that has been selected and signal-processed by the BS receiver 9, and the video signals 24 and 25 input from the video input terminals 10 and 11 are connected to the same person-powered changeover switch. Switched at S2 and video signal 21
becomes.

The output changeover switch S3 is the TV/BS switch S3.
Based on the selection of l, the microcomputer 1 sends out a command,
Since the movable piece is switched to the "TV interlocking" side 28, the video signal 21 coupled to the fixed piece of the "TV interlocking" side 28 of the output selector switch S3 passes through the movable part of the switch, passes through the buffer 6, and is output to the video signal. Output from output terminal 7.

The same video signal may be modulated into an RF multiplied signal by a modulation circuit and outputted, and the same modulated RF multiplied signal may be supplied from an antenna terminal to a video modulator or VTR that does not have a video input terminal to display satellite broadcasting. It becomes possible to record.

The switch S4 is used to switch the input selector switch S2 to the video input terminal 10 (or 11).
The switch S4 is a switch that is turned off based on a command issued by the video output terminal 7, and the switch S4 supplies a video signal from the video output terminal 7 to the VTR, and at the same time inputs the video signal output of the VTR to the video input terminal 10 (or 11). and the same VTR
When the VTR is set to record, the same video signal will flow back and cause an abnormality, so this switch is turned off to prevent this flow. Therefore, when connecting the video signal output of the VTR to a television receiver, the same video signal is turned off. Video input terminal 10 (or 11
), it is not possible to prevent the same return current. Therefore, at the video input terminal of the television receiver, for example, the video signal output of an rVTR should be connected to the video input terminal 10 (or 11). Attach a cautionary note.

When the TV power supply section 2 is turned off by operating the power switch 3, the operation of the television receiver including the BS receiving device is stopped.

Next, the TV/BS switch S1 is turned on.

The electrical operation when switching to mode 27 will be explained.

The TV power supply section 2 is turned on and off by operating a power switch 3.

When the TV power source section is turned on, the video signal 21 input through the manual changeover switch S2 is coupled to the CRT 5 via the video circuit 4 and displayed on the screen, as in the case of the ``TV interlock'' mode.

The BS power supply section 12 is always turned on in response to a command from the microcomputer 1 based on the selection of the TV/BS switch S1, regardless of whether the TV power supply section is on or off, and supplies power to the BS reception section 9 to be in a constant operating state. Then, the video signal from the BS enters the BS mode side 2 based on the command from the microcomputer 1.
The video signal is always outputted from the video output terminal 7 via the buffer 6 via the output changeover switch S3 which has been switched to 9.

In order to notify the user that the BS receiving device is operating even when the TV power supply unit 2 is off, the BS power display 13 using an LED (light emitting diode) etc. is lit using the power from the BS power supply unit. do.

The BS receiving unit 9 changes the reception channel and audio mode and sets the TV/BS switch Sl to "'BS on" according to the command from the microcomputer 1 based on the selection of the TV/BS switch Sl.
° The state immediately before switching to the mote 27 is locked to prevent the same reception channel or audio mode from being switched by operation of the television receiver's substitute unit or remote control.

To change the reception channel or audio mode,
This is done by switching the V/BS switch Sl to TV interlock mode 26 to release the lock.

The buffer 6 needs to be in an operating state even when only one of the TV power supply section and the BS power supply section is on.
Power is supplied from both the power supply section 2 and the BS power supply section 12 via a diode (not shown).

The purpose of supplying the power through a diode or the like is to prevent current from flowing backward from one power source to the other power source.

Although the above description has been made regarding video signals, there are also switches for audio signals that are constructed in the same manner as the switches S2, S3, and S4 and operate in conjunction with each other.

It is provided with an audio circuit, an audio amplification device, an audio input terminal, and an audio output terminal, and performs the same switching and signal processing as for video signals.

It also outputs the PCM audio digital signal from satellite broadcasting to the video output terminal 7, and outputs the PCM audio signal to the D/A.
The signal may be converted and output as an analog signal, or the video signal may be cut and only a high quality stereo audio signal etc. from satellite broadcasting may be output.

[Effects of the Invention] Since the present invention is constructed as described above, it has the following effects.

“The TV-linked upper mode stops the operation of the BS receiving device when no BS signal is selected, so it prevents unnecessary power consumption and also prevents the internal clock of the BS receiving unit from emitting interference waves. This prevents the interference waves from invading TV broadcasting and video input video signals, thereby preventing quality deterioration.

In “BS on” ° mode, BS video and audio signals are always output to the video and audio output terminals, so
It is possible to record BS signals even with a VTR or the like that does not have an S receiving device, and it is possible to record BS signals while receiving TV broadcasts on a television receiver, so-called "back recording".

When recording BS signals, only the BS receiving device can be operated on the TV receiver, so you can avoid wasting power by having the screen of the TV receiver clearly visible while you are away or recording your answering machine late at night. It can be avoided.

In addition, if the TV/BS switch S1 is switched to 'BS ON' mode, the BS receiver will fix the reception channel and audio mode, so if you accidentally change the reception channel or audio mode while recording the BS signal, You can prevent mistakes such as putting it away.

[Brief explanation of drawings]

Fig. 1 is a partially omitted block diagram of an electrical circuit of a television receiver incorporating a satellite broadcast receiving device showing an embodiment of the present invention, and Fig. 2 is an electrical circuit diagram of a conventional example of a television receiver incorporating a satellite broadcast receiving device. It is a partially omitted block diagram of a circuit. In the same figure, l is the microcomputer, 2 is the T'' electric?HX section, 7
is a video output terminal, 8 is a TV receiver, 9 is a BS receiver,
12 is a BS power supply unit, 21 is a video signal, 22 is a video signal from TV broadcasting, 23 is a video signal from BS, 26 is a first
position, 27 is the second position, 28 is the first position, 29 is the second position, 31 is the microcomputer, Sl is "TV interlock" -r-
- switch to switch between mode and BS mode, S
2 is an input selector switch, S3 is an output selector switch,
S4 is a one-way switch. Patent applicant: Fujitsu General Ltd. Figure 1 Figure 2

Claims (1)

[Claims] In a television receiver with a built-in satellite broadcast receiver,
When the TV/BS switch is in the first position, power is supplied to the satellite broadcast receiving device to operate it only when the input selector switch selects a satellite broadcast signal.
When the S switch is in the second position, the output selector switch is changed to constantly output the video signal and audio signal from the satellite broadcast to the video output terminal, and fix the reception channel and audio mode of the satellite broadcast receiver. A television receiver with a built-in satellite broadcast receiving device, characterized in that it is configured as follows.