JPS61280172A - Television power source controlling device - Google Patents

Abstract

PURPOSE:To make it possible to make on off of power source of a television receiving set from a remote controlling section as well as by a switch provided in a convertor by providing a remote switch and providing a pulse shaping section and an OR circuit to which the outputs of the pulse shaping section and switch are inputted and an output holding section in the body of a convertor. CONSTITUTION:When a remote switch RSW is changed from a contact B side to a contact A side, current flows in a relay coil 13l and a relay switch 13S is closed. Accordingly, a single pulse is outputted from a pulse shaping circuit 14. The pulse is inputted to a holding circuit 17 through the OR circuit 15 to drive the second relay 18, and a relay switch 18s is closed. Consequently, a power source E is supplied through supply terminals S1, S2 as the driving power source of a television receiver. When a switch 16 is made on from a convertor 12 side, the single pulse is outputted similarly to the holding circuit 17 through the OR circuit 15.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention is applicable to a specific guest room such as a hotel, when receiving CATV, and when watching TV from a position slightly distant from the TV receiver, for example, near a night park. The present invention relates to a television power control device that can be operated by moving a remote switch to a nightstand so that the receiver can be powered on or off at hand.

[Prior art and its drawbacks]

Generally, when powering on and off one device at two locations, it has conventionally been constructed using three lines 1-13 as shown in FIG. 8, and is usually called a "328 switch." In such a conventional system, changeover switches 4 and 5 are provided on the load side 2 where the load 1 is installed, and on the remote side 3, respectively, to switch between them, but in this configuration, current is always passed through a part of the load. It is impossible to keep the load on standby.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned points, and the purpose of the present invention is to provide a TV receiver at a remote location when receiving independent broadcasts such as information via a converter in addition to general TV broadcasts such as hotel CATV. To provide a television power supply control device which can be freely operated from either a remote switch or a switch provided on a converter body when it is desired to supply or stop power from a converter.

[Key points of the invention]

A remote switch is installed in the remote switch section that remotely controls the supply and stop of power to the television receiver, and a pulse shaping section that outputs a single pulse each time the remote switch is operated is installed in the converter body. a switch that outputs a single pulse every time a command is given to turn on and off the power supply to the television receiver, an OR circuit to which the outputs of the pulse shaping section and the switch are respectively input, and an output signal of the OR circuit. and a holding section whose output state is inverted and held, and supply and stop of power to the television receiver are controlled according to the output state of the holding section.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a television power supply control device. In FIG. 1, 11 is a remote switch section, and 12 is a converter connected to the remote switch section 11 through three lines ll-13. The remote switch section 11 is provided with a power supply E of ACloo V and a remote switch R8W, and when this remote switch R8W is closed to the contact A side, the above-mentioned line is switched on. When the power E is supplied through the line 12 and the remote switch R8W is closed to the contact B side, the power E is supplied through the line 12.

Next, the internal configuration of converter 12 will be explained. The line j1 is connected to both ends of the relay coil 134 of the 12th relay 13.

One end of the nine relay switch 13B is grounded, and the other end of the nine relay switch 13B is connected to the pulse shaping circuit 14. This pulse shaping circuit 14 has input/output characteristics as shown in FIGS. 2(A) and 2(B), and its specific configuration will be described later with reference to FIGS. 3 and 1g4. That is, the pulse shaping circuit 13 outputs a single pulse as shown in FIG. 2 (II) every time the relay switch 138 is closed or opened. is input to one end of the OR circuit 1.
An operation signal from a normally open automatic return switch I6 is input to the other end of the switch I6. When the switch I6 is open, a low level signal (ground potential) is input to the OR circuit 15, and when the switch 16 is closed, a high level signal is input to the OR circuit Z5. The output of the OR circuit 15 is input to a hold circuit 17.

The input/output characteristics of this hold circuit 17 are shown in FIG.
It has input/output characteristics as shown in Fig. 6, and its detailed configuration will be described later using Fig. 6 or Fig. 7.

Next, the output of the hold circuit 17 is transferred to the second relay 18.
is connected to one end of the relay coil Zll. Also,
One end of the relay switch I8S of this second relay 18 is connected to the line 1, and the other end is connected to the supply terminal S2 of the TV power source. Further, the line j2 is connected to the supply terminal S1.

(9) The lines lI and j2 are connected to the channel selection/frequency conversion unit 20VC via a transformer 19.

This channel selection/@wave number conversion section 20 selects a high frequency signal input from the input terminal IN, performs frequency conversion, and outputs the resultant signal to the output terminal OUT.

Next, the detailed configuration of the pulse shaping circuit I4 will be explained with reference to FIG. This pulse shaping circuit I4 includes an exclusive OR circuit 31 to which an input signal IN is input, an exclusive OR circuit 32 to which the input signal IN and power supply VDD are input, and an exclusive OR circuit 32 to which the output is input via a CR integration circuit. exclusive OR circuit 33 (this exclusive OR circuit 33 is connected to the power supply VD)
D is also input), and the output of this exclusive OR circuit 33 is input to the exclusive OR circuit 31. With this configuration, the input signal IN is
The output signal OU'l' is output as shown in FIG. 2 only when the signal changes as shown in FIG.

Note that FIG. 4 shows another example of the pulse shaping circuit Z4. This pulse shaping circuit I4 receives the input signal ZN.
An AND circuit 41 and an inverter 42 whose output is inputted via a CR integration circuit are provided.
The output of the inverter 45 is fed back through an inverter 43, and the input signal tN is fed back through an AND circuit 44 and an inverter 45 whose output is fed through a CR integration circuit. ing.

Then, the output of the inverter 42 or 45 is connected to an output signal OUT via diodes 41 and 48, respectively.
Take it out and put it in. Even with this configuration, the input signal TN changes as shown in FIG.
The output signal OUT is output as shown in the figure (to).

Next, the detailed structure of the hold circuit 17 will be explained with reference to FIG. The one shown in FIG. 6 is composed of an R8 flip 7a block, and the input signal IN is connected to an inverter 51.
through four NAND circuits 52. .about.55 is input to the R8 flip-flop a. And NAND circuit 53
The output of is output as the output signal OUT. This output signal OUT is connected to the base of a transistor Ql, and the relay coil 78I of the second relay 18 is connected to the collector side of a transistor Q2 whose pace is connected to the collector of this transistor QI. In this way, by providing the R8 prefab, the 5th
As shown in Figure (a), the output signal OUT is inverted and output.

Next, another example of the hold circuit 17 will be described with reference to diagram vIc7. The circuit shown in FIG. 7 is composed of a D-type flip-flop A, and the input signal IN is input to the σ-sock terminal C of the D-type flip-flop Oy pro1. Further, the Q output of the flip-flop 6I is inputted to the input terminal. Therefore, every time the input signal TN is input as shown in FIG. 5 (At), the output signal OUT is inverted and output as shown in FIG.

Next, the operation of one embodiment of the present invention configured as described above will be described.

First, as shown in FIG. 1, with the remote switch section 11 and the converter 12 connected through three lines 41 to 13, power B is applied from the remote switch section 11 side, and the converter 12 is placed in a standby state. It is assumed that

First, the case where the power is turned on from the remote switch section 11 side will be described. In this case, remote switch RA
Switch W from the contact B side to the contact side. As a result, current flows through the relay coil 131, and the relay switch 13B
is closed. Therefore, a single pulse is output from the pulse shaping circuit 14. This pulse is input to the hold circuit 17 via the OR circuit 15.

Therefore, the second relay 18 is activated and the relay switch 18g is closed. As a result, the power source E is connected to the supply terminal S
It is supplied as driving power for a television receiver via r and St.

A case will be described in which the power is turned off from the remote switch section 11 side. In this case, remote switch R
Switch 8W from the contact input side to the contact B side. This causes relay switch 138 to open. Therefore, a single pulse is output from the pulse shaping circuit 14. This single pulse is output to the hold circuit I7 via the OR circuit 15 as in the previous case. Therefore, since the output signal of the hold circuit 17 is inverted, the driving of the second relay 18 is stopped. Therefore, the relay switch 18@ is opened and the power supply to the television receiver is stopped.

The case where the power is turned on and off from the converter 12 side during busy periods will be explained. First, a case will be described in which the power is turned on when the relay coil isl is not excited, that is, the power is turned off. In this case, switch I6 is turned on. Therefore, a single pulse passes through the OR circuit I5 to the hold circuit 17! /c is output. Therefore, the output of the hold circuit 17 is inverted and becomes high level. Therefore, the relay coil 184 is energized and the relay switch 18s is closed. As a result,
A power source E is supplied through a supply terminal 81°S2 as a power source for driving the television receiver.

On the other hand, if it is okay to turn off the power, the switch 16 is turned on again. As a result, a single pulse is output to the hold circuit 17 via the OR circuit I5. Therefore, the output of the hold circuit I7 is inverted and becomes the a-level. Therefore, the coil 184 is no longer energized,
Relay switch port I opens. As a result, supply terminal SI
and 82, the supply of power to the television receiver is stopped.

In this way, the pulse shaping circuit 14 operates so that the same single pulse is generated whether the relay switch 13B is closed or opened by the operation of the remote switch R8W, and the automatic return type switch provided in the converter I2 Since a kind of single pulse is generated each time 16 is operated, even if the remote switch RAW and the automatic reset switch z6 provided in the converter 12 are operated in combination, both single pulses will be generated by the OR circuit. 15 leads to the hold circuit 17 in turn, so the hold circuit I7
The output state is sequentially inverted depending on the input pulse. Therefore, both sides can freely turn on and off the power.

Note that the pulse shaping circuit z4 is not limited to the configuration shown in FIG. 3 or FIG. 4, and a micro combinator may also be used.

Furthermore, although the configuration of the hold circuit 17 is also shown in FIG. 6 or FIG. 7, it may be similarly realized by a micro combinator.

〔Effect of the invention〕

As described in detail above, according to the present invention, remote control c)
A TV power supply that can turn on and off the power of the TV receiver by means of a switch provided in the converter, which is also used integrally with the TV receiver in the r-control unit and is partially energized and in a standby state. A side a device can be provided.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing a injection on the TV power supply side according to an embodiment of the present invention, Fig. 21! 5 and 4 are logic circuit diagrams showing the configuration of the pulse shaping circuit, respectively. 8 is a logic circuit diagram showing a hold circuit, and FIG. 8 is a circuit diagram showing a conventional television power control device. 11...Remote switch unit, I2...Converter, 13...First relay, 14... ...Pulse shaping circuit, I6...Auto return type switch, 17...d<-
A/do circuit, 18...second relay. Figure 3 Figure 2 CB) OLIT

Claims (1)

[Claims] a remote switch provided in the remote switch unit for remotely controlling supply and stop of power supply to the television receiver; a pulse shaping unit provided in the converter body and outputting a single pulse each time the remote switch is operated; A switch provided on the converter body that outputs a single pulse every time a command is given to supply or stop power to the television receiver, an OR circuit to which the outputs of the pulse shaping section and the switch are respectively input, and this logic. The present invention includes a holding section that receives an output signal from the sum circuit and inverts and holds the output state thereof, and a switch means that controls supply and stop of power to the television receiver according to the output state of the holding section. Features of the TV power control device.