JPH0533109Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a new stationary television receiver, and particularly to an input terminal into which a high-frequency signal from an antenna for receiving ordinary television broadcast waves is input, and a portable external television receiver. Equipped with an input terminal into which high-frequency signals of empty channels in the television broadcasting frequency band are input, including modulated waves of video signals output from equipment, and switching and tuning of the type of input high-frequency signals can be performed with simple operations. It is an object of the present invention to provide a new stationary television receiver that can be quickly installed and removed, and also allows easy installation and removal of portable external equipment.

BACKGROUND TECHNOLOGY AND PROBLEMS Portable external devices such as video game consoles, personal computers, and home video tape recorders have an RF output terminal that sends an RF signal in the television broadcasting frequency band to a television receiver.
Many television receivers utilize empty channels to display images on the screen.

By the way, conventionally, when a stationary television receiver is used as a display for an external device such as a television game machine, for example, and when it is used as a receiver for receiving original television broadcasts. There was a problem that switching between times was troublesome. This problem will be explained with reference to FIG. 1, which shows a conventional case. That is,
When connecting a portable external device, such as a TV game machine B, to a stationary television receiver A, a switch c attached to the TV game machine B is used, and one switching terminal d1 of the switch C is connected to the high frequency of the TV game machine B. Connect the signal output terminal and the other switching terminal d2
An antenna e is connected to the antenna e, and its common terminal f is also connected to an antenna connection terminal g of a stationary television receiver a. When watching television broadcast programs, switch the switch c to the switching terminal d2 side, and when enjoying TV games, switch the switch c to the switching terminal d2 side.
By switching to the 1 side, the high frequency signal input to the stationary television receiver a is switched.
Since it is preferable that this switch c be placed in close proximity to the antenna connection terminal g of the stationary television receiver a, it is often placed behind the stationary television receiver a.

Therefore, each time the user wants to switch between the state of watching a television broadcast program and the state of playing a video game, the user must manually operate the switch c on the back of the stationary television receiver a. Furthermore, when playing a video game on the video game machine b, an empty channel of the stationary television receiver a is used, so the channel of the stationary television receiver a must be switched to the empty channel. Therefore,
Switching between watching a broadcast program and playing a video game is relatively cumbersome.

Furthermore, when attaching or detaching the television game machine b, the user must put his hand behind the stationary television receiver a, and the task of replacing portable external equipment is also troublesome.

Purpose of the invention Therefore, the present invention provides an input terminal into which a high frequency signal from an antenna that receives normal television broadcast waves is input, and a television broadcast frequency band that includes a modulated wave of a video signal output from a portable external device. Equipped with an input terminal into which high-frequency signals from empty channels are input, it is possible to quickly switch and tune the type of high-frequency signals to be input with simple operations, and also facilitates the installation and removal of portable external equipment. The purpose of this invention is to provide a new stationary television receiver that can be easily installed.

Summary of the invention The structure of the invention to achieve the above object is to provide a high-frequency signal input terminal on the rear side of the cabinet into which high-frequency signals from an antenna for receiving ordinary television broadcast waves are input, and to At least one high-frequency signal input terminal into which a high-frequency signal of an empty channel in the television broadcasting frequency band including the modulated wave of the output video signal is input is provided on the front panel of the cabinet surrounding the cathode ray tube display surface, and the plurality of high-frequency signals an input selection switching means for selecting one of the input terminals and transmitting a high frequency signal from the input terminal to the tuner; and an external means for selecting a high frequency signal output from the portable external device provided on the front panel of the cabinet. A stationary television receiver equipped with a device selection switch and a channel selection switch for selecting normal television broadcasting, wherein the external device selection switch and the channel selection switch can be selected by operating one of them. When one television broadcast is selected by operating the channel selection switch, the input selection switching means automatically selects the high frequency signal from the antenna. When a portable external device is selected by operating the external device selection switch, the tuner is tuned to the selected television broadcast at the same time that the input terminal to which the external device is input is selected. The input selection switching means automatically enters a state to select an input terminal to which a high frequency signal of an empty channel in the television broadcasting frequency band containing a modulated wave of a video signal from the selected portable external device is input. This device is characterized in that the tuner is capable of tuning to a high frequency signal from the portable external device.

Embodiment 1 Hereinafter, the stationary television receiver of the present invention will be described in detail with reference to embodiments shown in the accompanying drawings.

2 to 4 show an example of the implementation of the stationary television receiver of the present invention. In the drawings, 1 is the stationary television receiver, and 2 is the inside of the stationary television receiver 1. tuner, 3 is a switching circuit for input selection, antenna connection terminal
It functions to select either Ta or external device connection terminal To and connect it to the input terminal of tuner 2. The antenna terminal Ta is provided on the rear side of the gear rack of the stationary television receiver 1, while the external device connection terminal To is provided on the front panel of the stationary television receiver 1, and is connected to a TV game machine 4, etc. A high frequency signal output terminal in the TV broadcasting frequency band of a portable external device is connected to this terminal. In addition to the external device connection terminal To, the front panel of the stationary television receiver 1 includes a power switch PS, tuning switches Sch1 to Sch12 for selecting VHF broadcast stations, and selection switches Sch1 to Sch12 for selecting specific UHF broadcast stations. A channel selection switch Suh, an external device selection switch So, a volume adjuster VR, etc. are arranged.

FIG. 4 is a circuit diagram showing the circuit configuration of the input side of the tuner 2 for switching the reception frequency signal of the stationary television receiver of the present invention. In the same figure, FSR1, FSR2,...FSRo are variable resistors for presetting the tuning frequency, and are connected in parallel to each other to set a predetermined value, for example 33V.
receiving frequency control voltage Vc
occurs separately. Each variable resistor FSR1,
FSR2,...Reception frequency control voltage generated by FSRo
Vc is a reception frequency control voltage input terminal (not shown) of the tuner 2 via the switches Sch1, Sch2, ...So corresponding to the variable resistor FSR, respectively.
is applied to each switch.
Selection display neon tubes NE1, NE2, ...NEo are provided inside Sch1, Sch2, ...So, respectively. NS1, NS2, ...NSo are switches for turning on and off the selection display neon tubes NE1, NE2, ...NEo.
Sch1, Sch2, ...The switch is linked with So.
When Sch1, Sch2,...So is pushed, it works to light up the corresponding neon tube NE. BS1, BS2, . . . BSo are band switching switches that perform band switching between three bands: the low channel channel of VHF broadcasting, the Haiti channel channel, and the UHF broadcasting channel.

The above tuning switch Sch1, Sch2,...Sch12,
Suh and the external device selection switch So (for convenience, only Sch1, Sch2, So and related items are shown in Figure 4), but two or more of them are not turned on at the same time, and only one of them is turned on. When the switch is turned on, other switches that had been kept on until then are automatically turned off. For example, when the tuning switch Sch1 is pushed to receive the broadcast of the first channel, only the tuning switch Sch1 remains on, and the reception frequency control voltage Vc (variable ) is input to a receive frequency control voltage input terminal (not shown) of the tuner 2 (preset by adjusting the resistor FSR1). The same applies even when other channels are selected. Also, if you push the external device selection switch So, the corresponding variable resistor
The reception frequency control voltage Vc set by adjusting FSRo is sent to the tuner 2. This reception frequency control voltage Vc is
A high-frequency signal in the television broadcasting frequency band output from a portable external device (in this example, the video game machine 4) connected to the TV (an empty channel of the stationary television receiver 1 [for example, the second channel, although it varies depending on the region)] It is necessary to set the signal to a value that allows reception of the channel corresponding to the channel.

The input selection switching circuit 3 is configured to change the selection according to the operation of the channel selection switches Sch1, Sch2, . . . and the external device selection switch So. That is, in this embodiment, when any one of the tuning switches Sch1, Sch2, . , when the external device selection switch So is turned on, the input selection switching circuit 3 connects to the external device connection terminal.
The state is such that a high frequency signal in the television broadcasting frequency band from To is transmitted to the tuner 2. Incidentally, C1 and C2 are insulating capacitors in the case of a hot chassis, and one capacitor may be provided corresponding to each switching terminal.

By connecting, for example, the output terminal of the video game machine 4 to the external device connection terminal To of the stationary television receiver 1, you can simply select the external device located on the front panel of the stationary television receiver 1. By simply pushing the computer switch So, the stationary television receiver 1 can be easily put into a state where it can be played without having to put your hand behind it to operate it. That is, a stationary television receiver 1
If the external device selection switch So1 is pushed while the computer is receiving a certain television broadcast, the following happens. In other words, when the stationary television receiver 1 is receiving a certain television broadcast, for example, the first channel, the channel selection switch
1 is in an on state, and a control voltage Vc from a variable resistor FSR1 is applied to the tuner 2 as a reception frequency control voltage. Further, the input selection switching circuit 3 is in a switching state so as to transmit a high frequency signal from the antenna connection terminal Ta to the tuner 2. When the external device selection switch So is pushed in this state, the switch So is turned on, and the channel selection switch Sch1, which had been on until then, is switched off. Then, the reception frequency control voltage Vc that causes the tuner 2 to tune to one free channel (for example, the second channel) is sent from the variable resistor FSRo, and the tuner 2 enters a state in which it is tuned to the second channel. At the same time, the input selection switching circuit 3 switches from the state in which it transmits the signal from the antenna connection terminal Ta to the tuner 2 to the state in which it transmits the signal from the external device connection terminal To to the tuner 2, and then from the portable external device 4 to the state in which it transmits the signal from the external device connection terminal To to the tuner 2. The output high frequency signal in the television broadcasting frequency band of the second channel is input to the tuner 2, where it is tuned and sent to the stationary television receiver 1.
functions as a display for the video game machine 4.

Further, when the stationary television receiver 1 is functioning as a display for the video game machine 4, one of the channel selection switches Sch1 to 12 and Suh disposed on the front panel of the stationary television receiver 1. If you press , the state will naturally change to the state in which the television broadcast specified by the pressed channel selection switch is being received.

In this way, this stationary television receiver 1
According to 2009, switching from the state of receiving television broadcasts to the state of functioning as a display of a portable external device, or vice versa, the switching from the state of functioning as a display of a portable external device to the state of receiving television broadcasts can be simply performed. This can be easily done by simply pressing a switch placed on the front panel of the stationary television receiver 1. Also,
Since the external device connection terminal To is arranged on the front panel of the stationary television receiver 1, portable external devices can be easily replaced.

Modified Example FIG. 5 shows a modified example 3' of the input selection switching means of the stationary television receiver of the present invention.

In the above embodiment, a simple switch is used as the input selection switching circuit 3 which is the input selection switching means, but a high frequency relay may also be used. Modification 3' shown in FIG. 5 uses a high frequency relay RL for the input selection switching circuit. In the figure, the SWs are set so that they remain off when any of the channel selection switches Sch1, Sch2,...Suh are turned on, and remain on when the external device selection switch So is turned on. The excitation current is supplied to the high frequency relay RL through this switch SW. When the high frequency relay RL is in a de-energized state, the common terminal a is connected to the switching terminal b, as shown by the solid line in Figure 5, and when it is energized, the common terminal a is connected to the switching terminal b, as shown by the two-dot chain line in the same figure. is connected to the switching terminal c. The common terminal a is connected to the tuner's high frequency signal input terminal, the switching terminal b is connected to the antenna connection terminal Ta, and
The switching terminal c is connected to an external device connection terminal To. Therefore, when receiving a television broadcast, one of the channel selection switches Sch1 to Sch12 and Suh is pressed and turned on, and at that time, the switch SW of the input selection switching circuit 3' is turned off. . Therefore, the high frequency relay RL is kept in a de-energized state, and the television broadcast signal from the antenna ANT is connected to the antenna connection terminal Ta.
It is input to Chuyuna through. When the external device selection switch So is pushed, the switch SW in the input selection switching circuit 3' is pressed.
is turned on, the high frequency relay RL is excited, and the high frequency signal of an empty channel in the television broadcasting frequency band, including the modulated wave of the video signal from the television game machine 4, is input to the tube 2. In addition, D is a reverse pulse absorption diode connected in parallel to the high frequency relay RL, LED is a light emitting diode that indicates that an external device is selected, and R is a resistor that regulates the current flowing to the light emitting diode LED. .

Embodiment 2 FIGS. 6 and 7 show a second embodiment 1' of the stationary television receiver of the present invention. In this embodiment 1', three external device connection terminals are provided, and an input selection switching circuit selects one of the four high frequency signal input terminals, the three external device connection terminals and the antenna connection terminal. This allows it to be electrically connected to the tuner's high frequency signal input terminal.

In this embodiment 1', the external device selection switch
Three Sos, ie, So1 to So3, are provided instead of one as in the first embodiment shown in FIGS. 1 to 4. The three external device selection switches So1~
So3 is arranged on the front panel of the stationary television receiver 1' so that it can be operated from the front.
In addition, there are three external device connection terminals To1.
-To3, one of which, To1, is placed on the front panel, and the other two, To2 and To3, are placed on the back of the stationary television receiver 1' in the same way as the antenna connection terminal Ta.

Each of the external device connection terminals To1 to To3 and the antenna connection terminal Ta are connected to an input selection switching circuit 5, and the input selection switching circuit 5 is connected to the external device connection terminals To1 to To3.
and one of the antenna connection terminals Ta is electrically connected to the high frequency signal input terminal of the tuner 2.
The input selection switching circuit 5 connects the antenna connection terminal Ta to the tuner 2 when a normal television broadcast is selected by operating one of the channel selection switches Sch1 to Sch12, Suh, and connects the antenna connection terminal Ta to the tuner 2, When any of the device selection switches So1 to So3 is pushed, the corresponding external device connection terminal To is connected to the tuner 2.

Each external device selection switch So1 to So3 is connected to a corresponding variable resistor FSRo1 to FSRo.
The receiving frequency control voltage Vc generated by the tuner 3 is sent to the tuner 2.

This stationary television receiver 1' is not only suitable for connecting a television game machine 4 to enjoy television games, but also for receiving television broadcast waves through a ghost prevention antenna, or for receiving television broadcast waves from artificial satellites. It is also suitable for receiving communication radio waves, and the input to be received by the stationary television receiver 1' can be switched very quickly.

That is, for example, as in the case of the embodiments shown in FIGS. 2 to 4, for example, the television game machine 4 is connected to the external connection terminal To1 on the front panel of the stationary television receiver 1', and the antenna connection terminal Ta is connected to the external connection terminal To1 on the front panel of the stationary television receiver 1'. Connect an ordinary television reception antenna ANT.

Then, because the reception condition of the antenna ANT on a specific channel, for example, the 4th channel, is poor and a ghost occurs, an antenna dedicated to receiving that specific channel, ie, the 4th channel, is used.
GANT antenna if installed
For example, GANT is connected to the second external device connection terminal To2. For example, if it becomes possible to receive satellite communications using a stationary television receiver in the future, for example, a third external device connection terminal To
3 is connected to a satellite communication receiving antenna PANT via a converter 6. This converter 6 converts a signal from a satellite so that it can reproduce video and audio using one free channel (for example, the second channel).

And each variable resistor for setting the receiving frequency
FSR, especially each external device selection switch So1~So3
The reception frequency is set appropriately by adjusting the variable resistors FSRo1 to FSRo3 corresponding to . That is, the variable resistor FSRo1 is adjusted so that the tuner 2 is tuned to the channel (for example, the second channel) of the high frequency signal in the television broadcasting frequency band output from the video game machine 4, and the variable resistor FSRo1 is
is adjusted to the channel where a ghost occurs (for example, the fourth channel in this example), and FSRo3 is adjusted to the channel in which the satellite communication broadcast is converted by the converter 6 (for example, the second channel).

If you do this, it will work just like the example shown in Figures 1 to 4.
Inputs can be switched very easily by operating Sch1 to Sch12, Suh, and So1 to So3.

Effects of the invention As described below, the stationary television receiver of the present invention is equipped with a high-frequency signal input terminal on the rear side of the gear cabinet into which high-frequency signals from an antenna for receiving ordinary television broadcast waves are input, and a portable At least one high-frequency signal input terminal into which a high-frequency signal of an empty channel in the television broadcasting frequency band, including a modulated wave of a video signal output from an external device, is input is provided on the front panel of the cabinet surrounding the cathode ray tube display surface, and the plurality of input selection switching means for selecting one of the high frequency signal input terminals of the input terminal and transmitting the high frequency signal from the selected input terminal to the tuner; A stationary television receiver is provided with an external device selection switch for selecting an external device and a channel selection switch for selecting a normal television broadcast, wherein the external device selection switch and the channel selection switch are operated by one of them. When a selection is made, the selection made by the other operation is canceled, and
When one television broadcast is selected by operating the channel selection switch, the input selection switching means automatically enters a state to select the input terminal to which the high frequency signal from the front antenna is input, and the tuner When one portable external device is selected by operating the external device selection switch, the input selection switching means automatically selects the selected portable external device. The tuner is in a state of selecting an input terminal to which a high frequency signal of an empty channel in the television broadcasting frequency band including a modulated wave of a video signal from the portable external device is input, and the tuner is able to tune to a high frequency signal from the portable external device. It is characterized by being done.

Therefore, first, switching to a high frequency signal of the desired type of television broadcasting frequency band and tuning can be performed simply by operating the channel selection switch or external device selection switch provided on the front panel of the cabinet. This eliminates the need to manually operate the switch located behind the stationary television receiver, making it extremely easy to switch between watching a TV number and playing a video game, for example. Become. Furthermore, since it was decided to provide the high frequency signal input terminal of an empty channel in the television broadcasting frequency band that contains the modulated wave of the video signal from at least one portable external device on the front panel of the cabinet, the stationary television receiver It also becomes extremely easy to replace the portable external device connected to the device with another one.

Therefore, we have developed a new stationary television receiver that has multiple input terminals for receiving high-frequency signals in the television broadcasting frequency band and can quickly switch and tune the type of input high-frequency signals with simple operations. can be provided.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram showing a conventional example, Figs. 2 to 4 show an example of implementation of the stationary type television receiver of the present invention, and Fig. 2 is a schematic diagram showing the stationary type television receiver. 3 is a front view of a stationary television receiver, FIG. 4 is a circuit diagram showing the main parts of the circuit, and FIG. 5 is a modification of the input selection switching means of the stationary television receiver of the present invention. The circuit diagrams shown in FIGS. 6 and 7 show other embodiments of the stationary television receiver of the present invention.
The figure is a schematic explanatory diagram showing a stationary television receiver, and FIG. 7 is a circuit diagram showing the main parts of the circuit. Explanation of symbols: 1, 1'... Stationary television receiver, 2... Tuner, 3, 3', 5... Input selection switching means, 4, 6... Portable external device, ANT... Antenna, So...External device selection switch, Sch, Suh...Tuning switch, Ta...Antenna input terminal, To, To1, To2, To3...
External device input terminal.

Claims (1)

[Scope of claim for utility model registration] A high frequency signal input terminal Ta is provided on the rear side of the cabinet to which the high frequency signal from the antenna ANT that receives ordinary television broadcast waves is input, and the high frequency signal is output from the portable external devices 4 and 6. At least one of the high-frequency signal input terminals To, To1, To2, and To3 into which a high-frequency signal of an empty channel in the television broadcasting frequency band containing a modulated wave of a video signal is input; The above multiple high frequency signal input terminals Ta, To, To
input selection switching means 3, 3', and 5 for selecting one of the input terminals 1, To2, and To3 and transmitting a high-frequency signal from the selected input terminal to the tuner 2; , an external device selection switch So that selects the high frequency signal output from 6, and a channel selection switch Sch, Suh that selects normal television broadcasting.
The above-mentioned external device selection switch So and the above-mentioned channel selection switches Sch and Suh are such that when a selection is made by the operation of one of them, the selection is made by the operation of the other. When one television broadcast is selected by operating the channel selection switches Sch and Suh, the input selection switching means 3, 3', and 5 automatically switch from the antenna to the antenna ANT. When the input terminal Ta to which the high frequency signal of is input is selected, the tuner 2 is tuned to the selected television broadcast, and by operating the external equipment selection switch So, the tuner 2 is tuned to the selected television broadcast.
When one portable external device 4, 6 is selected, the input selection switching means 3, 3', 5 automatically selects a television containing the modulated wave of the video signal from the selected portable external device 4, 6. The input terminals To, To1, To2, and To3 to which high-frequency signals of empty channels in the broadcast frequency band are input are selected, and the tuner 2 can tune to the high-frequency signals from the portable external devices 4 and 6. A stationary television receiver 1 characterized by:
1′.