JPH11289659A - Control system for electronic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To instantaneously respond to a remote controller with a small quantity of power consumption, even at power off. SOLUTION: A power circuit 3 generates a DC power voltage Es from the AC voltage Ea supplied through a pause switch 9, and applies it to a main circuit 5, a controller 6, and a pause circuit 8. When there is a command D for 'power off' from a remote controller 7, the controller 6 receives this and supplies a control signal S2 to the pause circuit 8, and the pause circuit 8 generates a switch control signal S3 and turns off the pause switch 9. Here, the pause switch 8 has a power charging means and turns on the pause switch 9 for a short time ΔT at a time, in every long period Ta with the switch control signal S3 and charges the charge means intermittently with the power voltage Es, thus enabling the detection of the command D from the remote controller 7. So, when there is a command D for 'power on' from the remote controller 7, it keeps the pause switch 9 in on condition through the switch control signal S3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television
In connection with control systems for electronic devices such as TRs and air conditioners,
In particular, it relates to a system for controlling a power supply unit and the like.

[0002]

2. Description of the Related Art Conventionally, in an electronic device such as a television receiver, a VTR, and an air conditioner, the power is turned off when the device is not used. One method of turning off the power is to manually turn on a power switch. There is a method of turning off and a method of operating a remote controller (hereinafter, referred to as a remote controller).

FIG. 14 is a block diagram showing a conventional control system for an electronic device, wherein 1 is an AC power supply, 2 is a power switch, 3 is a power circuit, 4 is a pause switch, 5 is a main circuit,
6 is a control device, 7 is a remote control.

In FIG. 1, a commercial AC voltage Ea of, for example, 100 V from an AC power supply 1 is supplied to a power supply circuit 3 via a power switch 1. The power supply circuit 3 includes a power supply transformer, a rectifying / smoothing circuit, a voltage stabilizing circuit, and the like, and generates a stable DC voltage Es of a predetermined voltage (for example, 5 V) from the supplied commercial AC voltage Ea.
The DC voltage Es is supplied as a power supply voltage to the main circuit 5 (for example, a signal circuit system for video and audio when the electronic device is a television receiver) via the pause switch 4.

In such a configuration, the power supply voltage Es can be supplied to the main circuit 5 by turning on the power switch 2 manually by the user, and the power supply of the main circuit 5 can be turned off by turning off the power switch 2. Can be cut.

The DC voltage E generated by the power supply circuit 3 is
s is also used as the power supply voltage of the control device 6. The control device 6 includes a controller, a timer, a memory, and the like, and has a function of controlling the main circuit 5, a function of receiving command information D by infrared rays from the remote controller 7, a function of decoding the command information D, It has a function of controlling the main circuit 5 and the pause switch 4 according to the decoded contents.

Therefore, when the power switch 2 and the pause switch 4 are turned on and the main circuit 5 is operating, the user operates the remote controller 7 to turn off the power.
Is transmitted, the control device 6 decodes the command information D, outputs the switch control signal S1, and turns off the pause switch 4. Thus, the power of the main circuit 5 can be turned off without operating the power switch 2.
When the power switch 2 is turned on and the pause switch 4 is turned off, and the remote controller 7 transmits the command information D of "power on", the control device 6 decodes the command information D and outputs the switch control signal S1. Then, the pause switch 4 is turned on. Thus, the power of the main circuit 5 can be turned on without operating the power switch 2.

By the way, in order to control the power supply of the main circuit 5 to be turned on and off by operating the remote controller 7, at least a command from the remote controller 7 among the functions of the control device 6 is required. The receiving function of the information D must always be in operation.

That is, when the main circuit 5 is in the operating state, the commercial AC power is taken in from the AC power supply 1 as described above. Therefore, the control device 6 at this time can always receive and decode the command information D from the remote controller 7. On the other hand, when the power supply of the main circuit 5 is turned off, there is no need to supply power from the AC power supply 1. However, if the power supply voltage is not supplied to the control device 6, the control device 6 sends the command information D
Cannot be received and decoded, so that the pause switch 4 in the off state cannot be turned on. For this purpose, in the conventional system shown in FIG. 14, the power switch 2 is provided between the AC power supply 1 and the power supply circuit 3.
When the rest switch 4 instead of the power switch 2 is turned off by operating the remote controller 7, the power supply voltage Es is supplied from the power supply circuit 3 to the control device 6. The pause switch 4 can be turned on in response to the power-on command information D from.

[0010]

According to such a conventional control system, when the power of the main circuit 5 is turned off by turning off the pause switch 4 by operating the remote controller 7, the above-described operation is performed. Since the power switch 2 is turned on, power is always supplied from the AC power supply 1 to the power supply circuit 3, and power is also supplied to the control device 6 at all times. This is because, as described above, the control device 6
Is necessary to be able to receive and decode the command information D from the control unit 6, but on the other hand, when the power is consumed by the control device 6 and the power consumption in the power supply circuit 3 is adjusted,
The amount of power consumed is considerable. In particular, when the electronic device is not used for a long time, such as at night, when the power is turned off by the remote controller 7 in this manner, the power consumption becomes very large.

An object of the present invention is to solve such a problem,
It is an object of the present invention to provide a control system for an electronic device which can effectively suppress power consumption in a power-off state and can be turned on at any time.

[0012]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a pause switch for stopping an external power supply to turn off an electronic device, and a power-off switch for turning off the electronic device. When in the state, it holds power capable of receiving information for turning on the power, and upon receiving the information,
A sleep circuit for turning on the sleep switch to turn on the electronic device.

According to the present invention, there is provided a pause switch for stopping an external power supply to turn off an electronic device, and a pause switch according to information for turning on and off the electronic device. A control device for controlling on / off of the
Along with the control device turning off the pause switch,
Turn off the power of the control device, and when the electronic device is in a power off state, hold the power required to receive the information for turning on the power, along with the reception of the information,
A pause circuit for turning on the control device, wherein when the control device is turned on by the pause circuit, the control device turns on the pause switch in response to the information for turning on the control device. .

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a first embodiment of a control system for an electronic device according to the present invention, wherein 8 is a pause circuit, 9 is a pause switch, and portions corresponding to FIG. A duplicate description will be omitted.

In this embodiment, in this embodiment, a pause switch 9 is provided between the power switch 2 and the power circuit 3, and the pause switch 9 is turned on and off by a switch control signal S3 from the pause circuit 8. You. The DC voltage Es generated by the power supply circuit 3 is supplied to the pause circuit 8 as a power supply voltage, similarly to the control device 6. The pause circuit 8 also has a function of receiving a transmission signal (for example, infrared light) from the remote controller 7.

When the power switch 2 is in the ON state, the pause switch 9 is turned on, so that the AC power supply 1 is turned on.
Is supplied to the power supply circuit 3 to generate a DC voltage Es. This DC voltage Es is supplied to the main circuit 5, the control device 6, and the pause circuit 8 as a power supply voltage.

When the power-off command information D is transmitted from the remote controller 7, the control device 6 receives and decodes the command information D, generates a control signal S2, and supplies it to the pause circuit 8. Pause circuit 8
Does not respond to the instruction signal D, but responds to the control signal S2 from the control device 6 in response to the switch control signal S3.
Is generated, and the pause switch 9 is turned off. As a result, the power of the main circuit 5, the control device 6, and the pause circuit 8 is turned off.

As described above, even when the power is turned off, the pause circuit 8 has a function of holding the power supply voltage, and holds a state in which a transmission signal from the remote controller 7 can be received. In order to have such a function of holding the power supply voltage, the pause circuit 8 includes a large-capacity capacitor. After the pause switch 9 is turned off, the pause switch 9 is turned on for a short period every predetermined period. . As a result, even if the accumulated charge of the capacitor is consumed, the power supply voltage ES is supplied from the power supply circuit 3 during the short-time ON period of the pause switch 9, thereby charging the capacitor.

As described above, even in the power-off state, when the pause switch 9 is turned on for a short time every predetermined period, the pause circuit 8 is in a state in which it can receive the transmission signal from the remote controller 7. Receives a transmission signal from the remote controller 7, and receives the transmission signal from the
Is generated, and the pause switch 9 is turned on. As a result, the power supply voltage Es is supplied to the main circuit 5, the control device 6, and the pause circuit 8.
Are supplied continuously.

Here, the transmission signal transmitted from the remote controller 7 in the above-mentioned power-off state is usually power-on command information D, but the pause circuit 8 has the information content in the above-mentioned power-off state. Regardless of the start, reception of the transmission signal from the remote controller 7, that is, for example, when this transmission signal is digital information, the switch control signal S3 which responds to the first transmission pulse (infrared pulse) and thereby turns on the pause switch 9 Is output. On the other hand, the control device 6 receives and decodes the command information D from the remote controller 7 and performs control operations of the respective sections including the main circuit 5, and the command information D instructs power-off. Only when this is done, the control signal S2 is output to control the pause circuit 8, and the power supply is turned off. That is, the setting of the power-off state is performed by the control device 6 when the command information D
And the release of the power-off state is performed by the pause circuit 8 starting to receive the transmission signal of the remote controller 7.

As described above, in this embodiment, the transmission signal from the remote controller 7 can be received even if little power is supplied from the AC power supply 1, and the AC power is supplied for a short time every predetermined period. Since the power is supplied from the power supply 1, even if the power-off state is continued for a long period of time, the power consumption can be suppressed to a sufficiently low level and the transmission signal can be received from the remote controller 7.

FIG. 2 is a block diagram mainly showing a specific example of the control device 3 and the pause circuit 8 in the first embodiment shown in FIG. 1, wherein 6a is a photodetector, 6b is an amplifier, 6c
Is a decoder, 6d is a controller, 6e is a display unit, 6f
Is a timer device, 8a is a diode, 8b is a capacitor,
8c is a photodetector, 8d is an amplifier, 8e is a clock generator, 8f is a timer device, 8g and 8h are OR circuits, 8i is an SR / FF (set / reset flip-flop circuit), 9 is a relay circuit, Parts corresponding to those in FIG. 1 are denoted by the same reference numerals, and redundant description will be omitted.

In the figure, the photodetector 6a of the control device 6
The light detector 8a of the pause circuit 8 receives a light signal (for example, infrared light) from the same remote controller 7 (FIG. 1). Hereinafter, the description will be made assuming that the power switch 2 (FIG. 1) is turned on.

When the pause switch 9 is on,
A DC power supply voltage Es is applied from the power supply circuit 3 to the main circuit 5, the control device 6, the pause circuit 8, and the like. There is). In this “power-on” state, when the photodetector 6 a receives an optical signal based on the command information D from the remote controller 7, it outputs an electric signal corresponding to the optical signal. After the electric signal is amplified by the amplifier 6b, it is supplied to the decoder 6c to decode the command information D. The controller 6d generates each control signal according to the contents of the decoded command information D. When the command information D indicates the control content of each unit such as the main circuit 5 (for example, when the electronic device is a television receiver, power on, channel number, volume adjustment amount, etc.), each control object is used as a control output. When it is the control information of the display unit 6e, it is sent to the control unit 6e, and when it is the time information such as timer reservation, it is sent to the timer 6f to perform the timer reservation operation and the like.

When the content of the command information D is a command to "power off" the electronic device, the controller 6d
Generates a control signal S2 and supplies it to the pause circuit 8.

In the pause circuit 8, when the pause switch 9 is turned on and in the "power-on" state, a DC power supply voltage Es is applied from the power supply circuit 3, and this power supply voltage Es causes the backflow prevention. The capacitor 8b is charged via the diode 8a. The charging voltage Ec of the capacitor 8b is used as a power supply voltage as a photodetector 8c, a clock generator 8e, a timer device 8f, and a relay 9a of a pause switch 9.
And so on. However, the photodetector 8c does not turn on unless it receives a light signal from the remote controller 7 (FIG. 1).

[0027] Now, when the light detector 8c receives a light signal from the remote control 7, by receiving the first light pulse, to generate a pulse signal P _L. This pulse signal P _L
Is amplified by the amplifier 8e and supplied to the set terminal of the SR FF 8i via the OR circuit 8g.
F8i is set. Thereby, this SR ・ F
The Q output of F8i becomes "H" (high level). This Q
The output is the switch control signal S3 shown in FIG. 1. When the switch control signal S3 becomes "H", the relay 9a is activated and the pause switch 9 is turned off if it is in the off state.
Turn on. Therefore, when the pause switch 9 is in the off state (in this case, “power off” state), for example, when a command operation such as “power on” is performed from the remote controller 7, the first light signal of the optical signal by the command operation is performed. The light pulse is received by the photodetector 8c and the pause switch 9
Will be turned on.

When the decoder 6c decodes the command information D from the remote controller 7 as "power off" by the command operation of "power off" on the remote controller 7, the controller 6d
Recognizes that the pause switch 9 is in the off state, and maintains this recognition state. When a command operation other than “power on” is performed with the remote controller 7 in the “power off” state where the pause switch 9 is off, the pause switch 9 is turned on as described above, 6d is a decoder 6c
The decoding result at this time is recognized only for "power-on", and no other recognition is performed. Therefore, for example, even if the channel selection operation is performed by the remote controller 7 in the above-mentioned “power off” state, the controller 6 d
Although it is recognized that the power is turned on, no control signal for channel selection is generated. Needless to say, when the power supply is commanded by the remote controller 7, the pause switch 9 is turned on and the controller 6d recognizes that the power supply is turned on. When the controller 6d recognizes “power on”, the controller 6d maintains the recognition of “power on” until it recognizes “power off”.
A control signal is generated in response to the command information D from.

The clock generator 8e always has a constant period T
It is generating a clock φ of _φ. At this time, if the pause switch 9 is on and in the “power-on” state, the timer device 8f is in a non-operating state as described later, and S
The R • FF 8i is held in the set state, and its Q output (accordingly, the switch control signal S3) is maintained at “H”.

In this state, the power is turned off from the remote control 7.
Is received by the photodetector 6a, the controller 6d generates the control signal S2 as described above. In the pause circuit 8, the control signal S2 is supplied to the reset terminal of the SR FF 8i via the OR circuit 8h,
Reset the FF 8i and set the timer device 8f to the operating state, for example, to preset the value to 0. As a result, the Q output of the SR FF 8i (therefore, the switch control signal S3) becomes "L" (low level), and the relay 9a operates to turn off the pause switch 9. Thus, the power is turned off by the remote controller 7.

As described above, when the power is turned off, the timer device 8f counts the clock φ from the preset value 0, and generates the set pulse Ps at every predetermined cycle Ta. Each time a set pulse Ps is generated, a predetermined time Δ
A reset pulse Pr is generated with a delay of T. The set pulse Ps is supplied to the SR • FF8 via the OR circuit 8g.
i, which is supplied to the set terminal of i to set the SR-FF 8i, and a reset pulse Pr is supplied to the SR-FF 8i via the OR circuit 8h with a delay of a time ΔT later to reset the SR-FF 8i. Therefore, SR
From the FF 8i, a Q output of “H” having a pulse width ΔT with a period Ta is obtained as the switch control signal S3, whereby the relay 9a is controlled.

According to this control, in the "power-off" state, the pause switch 9 is turned on by the time .DELTA.T every cycle Ta.
Are turned on intermittently, and during this ON period, the capacitor 8b in the pause circuit 8 is charged by the power supply voltage Es from the power supply circuit 3.

When the pause switch 9 is turned off, the charging of the capacitor 8b is stopped, and power is supplied from the capacitor 8b by the amplifier 8d, the clock generator 8e, the timer device 8f, and the like. The charging voltage decreases. Therefore, this capacitor 8b
Of the amplifier 8d and the clock generator 8
e, so that the charging of the capacitor 8b before lower beyond the lowest voltage value Ec _min to a timer device 8f can be maintained in the operating state is started, the period Ta of the switch control signal S3 is set, also, After the pause switch 9 is turned on and the capacitor 8b starts charging, the charging voltage Ec
Is set equal to the power supply voltage Es from the power supply circuit 3 (the charging voltage Ec at this time is hereinafter referred to as Ec _max ), and the pulse width ΔT of the control signal S3 is set.

Even in the "power off" state, the charging voltage Ec of the capacitor 8b is maintained at a predetermined voltage or higher (that is, the voltage Ec _min or higher) by intermittently charging the capacitor 8b in this manner. As a result, the pause circuit 8 can be maintained in the operating state as described above. Then, such an optical signal from a remote controller 7 (FIG. 1) in the state of "power off" is transmitted, if this optical detector 8c detects, by the detection pulse P _L of the optical detector 8c, the timer device 8f non At the same time as the operation state, the SR-FF 8i is set. As a result, the pause switch 9 is turned on, that is, turned on. This state is maintained until the control signal S2 is supplied from the control device 6.

FIG. 3 is a timing chart showing the above operation, and the same reference numerals are given to the voltages and signals corresponding to FIG.

2 and 3, a large-capacity capacitor such as an electric double layer type is used as the capacitor 8b in the pause circuit 8. This type of capacitor has a capacitance on the order of F (Farad). Now, the capacitance C of the capacitor 8b is set to 1F.
As a reduction amount according to the discharge of the discharge current (current flowing through such an amplifier 8d) i _d a 2μA capacitor 8b in a state of "power-off", the charging voltage Ec of the capacitor _{8b ΔV (≒ Ec max -Ec min} ) Assuming that the pause switch 9 is turned on when the power supply voltage reaches 1 V, the following equation is obtained from C · ΔV = _id · Ta: Ta = C · ΔV / _id = 1 × 1/2 × 10 ⁻⁶ (second) ≒ 1
40 (time), and the charging of the capacitor 8b may be performed at such a very long time interval Ta. As the charging period ΔT of the capacitor 8b, since the charging current i _d is too large for the power supply circuit 3 can be sufficiently short, for example, when the charging current i _d of about 0.1 A, the charging The period ΔT may be about 10 seconds.

As described above, in the "power-off" state, it is possible to respond to the command of the "power-on" remote controller 7 (FIG. 1) only by periodically charging the capacitor 8b for a short time. In addition, since it is not necessary to charge the capacitor 8b for a long time while being able to respond to the remote controller 7 in the "power off" state,
The power supply from the AC power supply 1 (FIG. 1) can be made small, and the power consumption in this state can be effectively suppressed.

In FIG. 2, a timer 6f in the control device 6 stores reservation information of timer reservation and the like. , The charging voltage Ec of the capacitor 8b is supplied as a power supply voltage.

[0039] Figure 4 is a block diagram showing a specific example of the timer device 8f in FIG. 2, 8f ₁ timer, 8f ₂
The AND gate, 8f ₃ is SR · FF.

[0040] In the figure, one input of the AND gate 8f ₂ clock from the clock generator 8e (Fig. 2) phi
, And the other input is the Q output of the SR · FF8f _3. The command for "power-off" from the remote control 7 (FIG. 1), when the control signal S2 is supplied from the control unit 6 (FIG. 2), by which, together with the timer 8f ₁ is preset to a value of 0, SR · FF8f ₃ is set the Q
The output becomes "H". Therefore, AND gates 8f ₂ is turned on, a clock φ is supplied to the timer 8f ₁ through the AND gate 8f _2. Timer 8f ₁ this clock φ
Is counted, a set pulse Ps is output for each cycle Ta, and a reset pulse Pr is output with a delay of time ΔT from the set pulse Ps.

In this state, when the detection pulse P _L is supplied from the photodetector 8c (FIG. 2), the detection pulse P _L is thereby supplied.
F8F ₃ is reset, its Q output becomes "L".
As a result, AND gate 8f ₂ is off, the timer 8f
_1, the clock φ is not supplied, and the pulses Ps,
The output of Pr stops.

FIG. 5 is a block diagram showing another specific example of the pause circuit 8 in FIG. 1, where 8f 'is a timer, 8j, 8k
Denotes an SR / FF, and 8m denotes an OR circuit. Portions corresponding to those in FIG. 2 are denoted by the same reference numerals, and redundant description is omitted. FIG. 6 is a timing chart showing the operation of the specific example shown in FIG. 5, and the signals and voltages corresponding to FIG.

5 and 6, the clock generator 8
e and the timer 8f 'are always in operation.
f ′ counts the clock φ from the clock generator 8e and generates a set pulse Ps with a period Ta and a reset pulse Pr with a delay of ΔT from the set pulse Ps. Therefore, the control signal S32 of "H" with the pulse width ΔT is obtained in the cycle Ta from the SR FF 8k set and reset by these.

On the other hand, the light detector 8c is operated by the remote controller 7 (FIG. 1).
When generating a pulse P _L by detecting an optical signal from this detection pulse P _L is supplied to the set terminal of the SR · FF8j, the SR · FF8j is set by these. Further, when a control signal S2 corresponding to the "power off" command is supplied from the controller 6d (FIG. 2) of the control device 6, the SR • FF 8j is reset by the control signal S2. Therefore, from this SR · FF8j, "L" next with command "Power off", the detection pulse P _L control signal S31 which becomes "H" the generation of the light detector 8c is obtained.

Control signal S3 from SR FFs 8j and 8k
1, S32 are supplied to the OR circuit 8m, and the OR circuit 8m
The output signal of m is supplied to the relay 9a of the pause switch 9 as the switch control signal S3.

Therefore, when the control signal S31 output from the SR FF 8j is "H", the switch control signal S3 output from the OR circuit 8m becomes "H", whereby the pause switch 9 is set to the ON state. Then, the capacitor 8b is continuously charged by the power supply voltage Es from the power supply circuit 3. When a control signal S2 is supplied from the control device 6 in response to a "power-off" command from the remote controller 7, the SR • FF8j is reset and the control signal S31 becomes “L”, the control signal output from the SR • FF8k S32 passes through the OR circuit 8m, and the switch control signal S3
Is supplied to the relay 9a. As a result, the pause switch 9 is turned on by the period ΔT for each cycle Ta, and this period Δ
The capacitor 8b is charged every T.

As described above, also in this specific example, the same operation as the specific example shown in FIG. 2 is obtained, and the same effect can be obtained.

FIG. 7 is a block diagram showing still another specific example of the pause circuit 8 in FIG. 1. Reference numerals 8p and 8q denote voltage comparators, and portions corresponding to those in FIG. The description of the operation will be omitted. FIG. 8 is a timing chart showing the operation of the specific example shown in FIG. 7, and the same reference numerals are given to the voltages and signals corresponding to FIG.

7 and 8, in this embodiment, the clock generator 8e in the specific example shown in FIG.
Instead of the timer 8f ', the voltage comparators 8p and 8q are used.

The voltage comparator 8p compares the charging voltage Ec of the capacitor 8b with a predetermined reference voltage E _H. When Ec ≧ E _H , the reset signal Pr of “H” is set.
Occurs. The SR · FF8k outputs the reset signal Pr
Reset at the rising edge of In addition, the voltage comparator 8
q is a comparison between the charging voltage Ec of the capacitor 8b and a predetermined constant reference voltage E _L (<E _H ), and Ec ≦ E
_At the time of _L , a set signal Ps of “H” is generated. SR ・
The FF 8k is set at the rising edge of the set signal Ps.

Then, when a "power on" command is issued from the remote controller 7 (FIG. 1), the photodetector 8c receives an optical signal,
By SR · FF8j is set by these by detection signals P _L, control signal S31, therefore, when the switch control signal S3 is "H", pause switch 9 is in an ON state of the "power on" , The capacitor 8b is always in a charged state, and the charging voltage E at that time is
For voltage value Ec _max of c, a _{Ec max> E H> E L} , a reset signal Pr is "H", the set signal Ps
Is "L", and the SR FF 8k is in a reset state.

In this state, when the remote controller 7 issues a power-off command and the control device 6 supplies the control signal S2 and the SR / FF 8j is reset, the SR / FF 8j is reset.
The control signal S31 output from the FF8j, and
The switch control signal S3 from the circuit 8m is inverted from “H” to “L” (at this time, the SR • FF 8k is reset and the control signal S32 is “L”),
The pause switch 9 turns off. Thereby, the capacitor 8
b, the charging is stopped and the charging voltage Ec decreases as shown in FIG.

[0053] When the charging voltage Ec is lower than the reference voltage E _H, the reset signal Pr becomes "L" output from the voltage comparator 8p, if the Ec = E _L is even lower, the voltage comparator 8q The output set signal Ps is inverted from “L” to “H”, and the rising edge of SR ·
FF8k is set and the control signal S32, thus OR
The switch control signal S3 from the circuit 8m becomes “H”.
As a result, the pause switch 9 is turned on, and the capacitor 8b
Is restarted, and its charging voltage Ec increases. When the charging voltage Ec is equal to the reference voltage E _H,
The reset signal Pr from the voltage comparator 8p changes from "L" to "H", and the rising edge of the reset signal Pr resets the SR-FF 8k. Thereby, the control signal S32, and therefore,
The switch control signal S3 from the OR circuit 8m is inverted from “H” to “L”, and the pause switch 9 is turned off. Therefore,
The charging of the capacitor 8b is stopped, and the charging voltage Ec decreases again.

[0054] As long as the SR · FF8j is in the reset state, the above operation is repeated, the charge voltage Ec of the capacitor 8b is lowered to the reference voltage E _L, SR · FF8
k is dormant switch 9 is turned on is set, whereby the capacitor 8b is charged, when the charge voltage Ec increases to the reference voltage E _H, pause switch 9 SR · FF8k is reset to off.

Here, the reference voltage E _L is a voltage at which the charging voltage Ec is slightly higher than the lowest voltage at which the amplifier 8d and the voltage comparators 8p and 8q can be maintained in the operating state, and the above-mentioned voltage value Ec _min corresponds to, also, the reference voltage E _H is, as described above, Ec _max> in E _H the case, as the charging voltage Ec is the time from the value E _H until value E _L is sufficiently long, It is set.

[0056] Now, the electrostatic capacitance C of the capacitor 8b as above 1F (farad), (current flowing through such an amplifier 8d) discharge current of the capacitor 8b in the "power off" state i _d a 2 .mu.A, the capacitor 8b Charging voltage E
voltage drop amount from c value E _H to a value E _L ΔV (= E _H -
Assuming that E _L ) is 0.5 V, the intermittent ON period Ta ′ of the pause switch 9 is C · ΔV = _id · Ta ′, and Ta ′ = C · ΔV / _id = 1 × 0.5 / 2 × 10
⁻⁶ (seconds) ≒ 70 (hours), and also in this case, charging of the capacitor 8b is performed at a very long time interval Ta ′. The capacitor 8
Since the charging current from the power supply circuit 3 is very large, the charging period ΔT of b can be sufficiently short. For example, when this current is about 0.1 A, it may be about 5 seconds.

As described above, in this embodiment, as in the previous embodiment, when the power is off, the AC power supply 1
It is possible to immediately respond to a command from the remote controller 7 while minimizing the power supply from (FIG. 1).

The higher reference voltage E _H is generated from a charging voltage Ec of the capacitor 8b by a constant voltage source (not shown). As shown in FIG. 7, the lower reference voltage E _L is obtained by dividing the reference voltage E _H by resistance division.

FIG. 7 may be modified as follows. That is, when the set signal Ps is generated from the voltage comparator 8q without using the voltage comparator 8p, the set signal Ps is delayed by a predetermined amount by a delay circuit, and the output of the delay circuit is output by SR ·
The reset signal Pr of the FF 8k is used. In this case, the delay amount of the delay circuit may be set so that the timing of the reset signal Pr from the delay circuit is the same as the timing of the reset signal Pr in FIG. 7, for example, with respect to the set signal Ps. In this case,
From the charging voltage Ec of the capacitor 8b, the above-described reference voltage E _L
It is sufficient to generate only

FIG. 9 is a block diagram showing a second embodiment of the control system for an electronic device according to the present invention.
Numeral 11 denotes a pause switch, and portions and signals corresponding to those in FIGS. 1 and 14 are denoted by the same reference numerals, and redundant description will be omitted.

In this embodiment, a pause switch 4 is provided on the input side of a main circuit 5 as in the conventional control system shown in FIG. DC power supply voltage Es is applied from
The pause switch 4 is turned on and off by a switch control signal S1 from the control device 6.

Here, the controller 6 includes a pause switch 1
1, a DC power supply voltage Es is applied from the power supply circuit 3, and the pause circuit 8 is also supplied with the power supply voltage Es via the pause switch 10. These pause switches 10,
Reference numeral 11 is turned on and off by switch control signals S3 and S4 from the pause circuit 8.

Now, when the power switch 2 is turned on, the pause switches 4, 10, and 11 are also turned on and in the "power on" state, when the command information D of "power off" is transmitted from the remote controller 7, The controller 6 receives and decodes the signal, generates a switch control signal S1 to turn off the pause switch 4, and supplies a control signal S2 to the pause circuit 8. When receiving the control signal S2, the pause circuit 8 generates switch control signals S3 and S4 to turn off the pause switches 10 and 11. As a result, the power is turned off.

The pause circuit 8 has, for example, the configuration shown in FIG. 5 or FIG. 7, and turns on the pause switch 10 by the switch control signal S3 output from the OR circuit 8m.
Off control and the control signal S3 from the SR FF 8j.
Let 1 be the switch control signal S4 of the pause switch 11.
Thus, in the "power-off" state, similarly to the embodiment shown in FIGS. 5 and 7, the pause switch 10 is turned on at a predetermined cycle for a predetermined time and the power supply voltage Es is intermittently supplied. Thus, the capacitor 8b shown in FIGS. 5 and 7 is charged. Thereby, the pause circuit 8
Even in the “power off” state, it is possible to immediately respond to the transmission signal of the remote controller 7.

Then, when there is command information D of "power on" from the remote controller 7, the pause circuit 8 receives the optical signal according to this command, immediately responds to this, and generates the switch control signal S3. Then, the pause switch 10 is turned on, and the switch control signal S4 is generated to turn on the pause switch 11. As a result, the supply voltage Es starts to be applied to the pause circuit 8 and the control device 6, but the control device 6
When the power supply voltage Es is applied, the power supply voltage Es decodes this "power-on" command information D, generates the switch control signal S1, and turns on the pause switch 4. As a result, the power supply voltage Es is applied to the main circuit 5. In this way, the power is turned on.

In order to enable the control device 6 to receive and decode the power supply voltage Es after the power supply voltage Es has been applied thereto, the command information D for “power on” is provided at the top of the command information D. Dummy information is added, and the pause circuit 8 responds to this dummy information and responds to the regular "power-on".
It is needless to say that the power supply voltage Es is applied to the control device 6 before the command information D is transmitted from the remote controller 7.

As described above, in the second embodiment, the same effect as in the first embodiment can be obtained. However, the pause switches 10, 11, and 4 include transistors and the like. , A simple switching circuit can be used. Incidentally, in the first embodiment shown in FIG. 1, the pause switch 9 is provided at the preceding stage of the power supply circuit 3, so that the power consumption in the power supply circuit 3 can be suppressed in the “power off” state, Since a portion between the AC power supply 1 and the power supply circuit 3 is a high voltage and large current portion, as the pause switch 9 used here, a switch device using a large and expensive relay capable of withstanding these conditions is used. Required.

In the second embodiment, in the "power off" state, the pause switch 4 is kept in the off state, so that the power supply voltage Es is not applied to the main circuit 5 at all. . On the other hand, in the first embodiment shown in FIG. 1, the pause switch 9 is intermittently turned on even in the “power off” state, so that the power supply voltage Es is supplied to the main circuit 5 during the on period. Thus, the electronic device is in an operating state. For example, when the electronic device is a television receiver, the intermittent on-time (for example, time ΔT in FIG. 3) in the “power-off” state is set to 10 as described above.
In seconds, the television receiver is in operation for 10 seconds. However, this does not occur in the second embodiment shown in FIG.

In the second embodiment shown in FIG. 9, the switch control signal S4 from the pause circuit 8
May be used for on / off control of the power supply.

FIG. 10 is a block diagram showing a third embodiment of the electronic device control system according to the present invention.
The same reference numerals are given to the portions and signals corresponding to, and redundant description will be omitted.

In the figure, in the third embodiment, the pause switch 10 in FIG. 9 is eliminated and the configuration is simplified.

That is, the power supply voltage Es is supplied from the power supply circuit 3 to the pause circuit 8 and the control device 6 via the common pause switch 11.
Is supplied. This pause switch 1
1 is turned on / off by a switch control signal S3 formed by the pause circuit 8. Other configurations are the same as those of the second embodiment shown in FIG.

Here, in the "power off" state, the power supply voltage Es is intermittently applied to the control device 6 by the switch control signal S3 from the pause circuit 8, as in the previous embodiment. However, even if such an operation is performed, the application time of the power supply voltage Es is extremely short, and the cycle of the application can be made very long. It is negligibly small and, like the second embodiment shown in FIG.
In the "power-off" state, the power supply voltage Es is not applied to the main circuit 5 at all, and therefore the operation state does not intermittently operate even for short time intervals. In this way, the same effect as in the second embodiment can be obtained.

FIG. 11 is a block diagram showing a fourth embodiment of the control system for an electronic device according to the present invention.
Denotes a pause switch, parts corresponding to those in FIG. 10 are denoted by the same reference numerals, and redundant description is omitted.

In the figure, in the fourth embodiment, the number of pause switches is further reduced as compared with the third embodiment shown in FIG. 10, and the system is simplified.

That is, in the fourth embodiment, one pause switch 3 is provided at the output stage of the power supply circuit 3,
Is supplied to the main circuit 5, the control device 6, and the pause circuit 8 via the pause switch 12. When the pause switch 12 is turned on,
The off control is performed by a switch control signal S3 generated by the pause circuit 8. Therefore, in the control device, FIG.
No switch control signal S1 as shown in FIG. 1 is generated.

The fourth embodiment is different from the first embodiment shown in FIG.
This embodiment is different from the first embodiment in that a pause switch is provided on the output terminal side of the power supply circuit. However, the pause switch 12 turns on and off a DC voltage Es having a constant voltage value of about 5 V. Therefore, a simple and inexpensive switching device including a transistor and the like can be used, and the other effects are the same as those of the first embodiment.

In a conventional electronic device such as a VTR, when a timer is reserved, the user inputs the reservation information and then turns off a manual power switch (corresponding to the power switch 2 in FIG. 1) to reserve the timer. In some cases. Also in the above embodiment, even when such a timer reservation is made, the power supply of the main circuit is automatically turned on when the reservation time comes. For example, like a conventional electronic device such as a VTR, a part of such an electronic device is in a standby state when a power supply voltage is supplied, and when a reserved time comes, the part in the standby state operates to operate the main circuit. When the predetermined operation is completed, the power supply is returned to the original “power off” state. However, the same configuration can be adopted in each of the above embodiments. .

FIG. 12 shows a fifth embodiment of the control system for an electronic device according to the present invention configured as described above. Here, parts corresponding to those in FIG. 2 are denoted by the same reference numerals, and redundant description will be omitted.

In the same figure, when the power switch 2 (FIG. 1) is manually turned off to make a timer reservation,
As described above, the reservation information of the timer reservation for the timer 8f of the pause circuit 8 is stored. This reservation information is input from the remote controller 7 (FIG. 1) and is decoded by the decoder 6c. The controller 6 according to the decrypted reservation information
d occurs a time set signal S _T, thereby, reservation information to the timer 8f pause circuit 8 is set.

Thereafter, when the reservation start time of the reservation information comes, the set pulse Ps' is output from the timer 8f,
As a result, the sleep switch 9 is turned on by setting the SR / FF 8i. At the same time, the timer 8f generates the timer reservation control signal S5, thereby operating the part in the standby state (not shown). The AC voltage Ea is supplied to the power supply circuit 3 via the pause switch 9. At the time when the reservation operation ends, the timer 8f outputs the reset signal P
r 'is output, thereby resetting the SR FF 8i and turning off the sleep switch 9. At the same time, the timer 8f outputs a timer reservation control signal S5 to bring the above-mentioned portion into the original standby state.

The fifth embodiment is directed to the specific example shown in FIG. 2, and the operation other than the above-described reservation operation is the same as that of the embodiment shown in FIG. The same applies to the specific example shown. Also, in the specific example shown in FIG. 7, a timer for timer reservation is provided in the pause circuit 8, and the SR / F based on the reservation information is also provided from this timer.
The same operation can be performed by generating a set / reset signal of F8j and a reservation control signal.

In the above embodiment, the control device 6 and the pause circuit 8 are provided with the photodetectors for receiving the optical signal from the remote controller separately (that is, the photodetectors 6a and 8c). It may be common. For example, the detection output of the photodetector 8c of the pause circuit 8 may be supplied to the amplifier of the control device 6.

In the pause circuit 8 in each of the above embodiments, when the photodetector 8c detects light as shown in FIGS. 2, 5, 7, and 12, a detection signal PL is generated. The pause switches 910 and 11 are turned on. However, when the remote controller 7 transmits the command information D of “power on”,
The sleep switch 910, which responds exactly to this only,
In order to turn on 11 or the like, a decoder may be provided in the pause circuit 8 in each embodiment. For example, FIG.
In the pause circuit 8, a decoder is provided in the next stage of the amplifier 8d to decode the output signal of the amplifier 8d. Only when the result of the decoding is a command to turn on the power, the OR
The SR FF 8i is set via the circuit 8g.

Further, the timer 6f in the control device 6 may be shared by the timer devices 8f and 8f 'in the pause circuit 8. In this case, as in the embodiment shown in FIG. 12, information necessary for the timer such as the reservation information decoded by the decoder 6c is sent to the timer device in the pause circuit 8 by the controller 6d. Control signals for each reserved operation are output from the timer device.

FIG. 13 is a block diagram showing one specific example of the power supply circuit 3 in each of the above embodiments. 3a is a relay switch, 3b is a transformer, 3c is a rectifier diode, 3d is a smoothing capacitor, and 3e is a constant. The voltage circuit, 3f is a voltage detector, 3g is a switching transistor, and portions corresponding to those in FIG.

In FIG. 10A, the relay switch 3a
Is turned on (of course, in this case, for example, in FIG. 1, the power switch 2 and the pause switch 9 are turned on), the commercial AC voltage Ea from the AC power supply 1 is stepped down by the transformer 3b, and the rectifier diode The current is rectified by 3c and smoothed by the smoothing capacitor 3d. The DC voltage Es' thus obtained is supplied to the constant voltage circuit 3e, and a DC voltage Es having a stable voltage value is obtained.

On the other hand, the voltage detector 3f detects the charging voltage of the smoothing capacitor 3d (that is, the smoothed DC voltage E
s ′) is constantly detected, and as shown in FIG. 13B, the charging voltage E is charged by charging the smoothing capacitor 3d.
If s' is boosted to a voltage value E _U set in advance, to turn off the relay transistor 3a to turn on the switching transistor 3g. As a result, the smoothing capacitor 3d is not charged and starts discharging, as shown in FIG.
As shown in the figure, the charging voltage Es' decreases. Then, the charging voltage Es' is set to a predetermined voltage value E _D
When the voltage drops to the maximum, the voltage detector 3f turns off the switching transistor 3g, turns on the relay switch 3a, and restarts charging with the smoothing capacitor 3d. Hereinafter, such an operation is repeatedly performed.

[0089] Here, the voltage value E _D, for example, equal to the voltage Es generated by the constant voltage circuit 3e, also,
The voltage value EU is set higher than the voltage value ED by a predetermined value (for example, about 1 V).

By operating the power supply circuit 3 in this manner, it is not necessary to always supply power from the AC power supply 1, and power saving can be achieved. Incidentally, the _{Es = E D = 5V E U} = 6V, as a smoothing capacitor 3d, a large capacity as described above, for example, using a capacitor C = 10F, also when the load current i _R and 10 mA, E _U - Since E _D = 1V, the period T _OFF during which the relay switch 3a is turned off to cut off the AC voltage is T _OFF = C · (E _U −E _D ) / i _R = 10 × 1 / 0.01 = 1.
000 seconds, that is, the AC voltage Ea can be cut off for about 15 minutes. Further, assuming that the charging current i _C of the smoothing capacitor 3d is 1A, the period T _ON required to charge the charging voltage Es ′ of the smoothing capacitor 3d from 5V to 6V is T _ON = 10 × _1/1 = 10 seconds. . From the above, relay switch 3a for 10 seconds
Is turned on to charge the smoothing capacitor 3d, and then the operation of turning off the relay switch 3a and shutting off the AC power supply for about 15 minutes may be repeated.

Thus, in comparison with the case where the smoothing capacitor 3a is always charged at 6 V and 1 A, in this specific example, it is sufficient to charge the battery under the same conditions for 10 seconds to 1000 seconds as described above. Therefore, the power required from the AC power supply 1 is only required to be 1/100, and it is possible to greatly reduce power consumption. In this specific example, the power required from the AC power supply 1 for performing one charge is the power supply circuit 3
6 (V) × 1 (A) × (1 / 0.3) × (10/1000) = 0.
2 (W), whereas 6 V, 1
When charging is always performed at A, the power required from the AC power supply 1 is 20 (W).

A specific example of the power supply circuit 3 is such that a pause switch for turning on / off the power supply voltage to the main circuit 5 is connected to the power supply circuit 3.
9 to 11, the commercial AC voltage Ea is supplied even when the power is turned off by the remote control 7 as in the embodiment shown in FIGS. It is particularly useful.

[0093]

As described above, according to the present invention,
The power supply from the external power supply is almost unnecessary, and it is possible to maintain a state in which a command to start the power supply can be received, and it is possible to immediately respond to such a command while significantly reducing power consumption. The electronic device can be immediately activated.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of a control system for an electronic device according to the present invention.

FIG. 2 is a block diagram showing a specific example of a control device and a pause circuit in FIG. 1;

FIG. 3 is a timing chart showing an operation of the specific example shown in FIG. 2;

FIG. 4 is a block diagram illustrating a specific example of a timer device in the pause circuit in FIG. 2;

FIG. 5 is a block diagram showing another specific example of the pause circuit in FIG. 1;

FIG. 6 is a timing chart showing an operation of the specific example shown in FIG. 5;

FIG. 7 is a block diagram showing still another specific example of the pause circuit in FIG. 1;

FIG. 8 is a timing chart showing an operation of the specific example shown in FIG. 7;

FIG. 9 is a block diagram showing a second embodiment of the control system for an electronic device according to the present invention.

FIG. 10 shows a third control system for an electronic device according to the present invention.
It is a block diagram showing an embodiment.

FIG. 11 shows a fourth embodiment of the electronic device control system according to the present invention.
It is a block diagram showing an embodiment.

FIG. 12 is a fifth view of the electronic device control system according to the present invention;
It is a block diagram showing an embodiment.

FIG. 13 is a configuration diagram showing a specific example of a power supply circuit in each embodiment.

FIG. 14 is a block diagram illustrating an example of a conventional electronic device control system.

[Explanation of symbols]

Reference Signs List 1 AC power supply 2 Power switch 3 Power supply circuit 4 Pause switch 5 Main circuit 6 Control device 6a Photodetector 6c Decoder 6d Controller 7 Remote controller 8 Pause circuit 8b Capacitor 8c Photodetector 8e Clock generator 8f, 8f 'Timer device 8i, 8m , 8n Set-reset type flip-flop circuit 8p, 8q Voltage comparator 9-12 Pause switch

Claims (9)

[Claims] 1. A system for controlling power supply means of an electronic device to which power is supplied from the outside, comprising: a pause switch for stopping power supply from the outside to turn off the electronic device; A sleep circuit for holding power capable of receiving information for turning on the power when the power is off, receiving the information and turning on the sleep switch to turn on the electronic device; A control system for an electronic device, comprising: 2. A system for controlling power supply means of an electronic device to which power is supplied from the outside, comprising: a pause switch for stopping power supply from the outside and turning off the electronic device; A control device for controlling on / off of the pause switch in accordance with information for turning on / off the power supply;
Turn off the power of the control device, and when the electronic device is in a power off state, hold the power required to receive the information for turning on the power, along with the reception of the information,
A pause circuit for turning on the power of the control device, wherein when the power of the control device is turned on by the pause circuit, the pause switch is turned on in response to the information for the control device to turn on the power. A control system for an electronic device, comprising: 3. The power supply device according to claim 1, wherein the sleep circuit is configured to hold power necessary to receive the information for turning on the power when the electronic device is in a power off state. A control system for an electronic device, being a capacitor. 4. The control system according to claim 3, wherein the capacitor is a large-capacity electric double-layer capacitor. 5. The power supply circuit according to claim 3, further comprising a power supply circuit for converting a high-power AC voltage to a low DC power supply voltage, wherein the pause circuit turns off the electronic device when the pause switch is on. A control system for the electronic device, comprising: means for charging the capacitor with the power supply voltage for a period ΔT that is negligibly short as compared with the period Ta for each sufficiently long period Ta. 6. The method of claim 5, wherein the said at power-on of the electronic apparatus pause switch is on, the capacitor is charged always voltage value Ec _max by the power supply voltage from said power supply circuit, the period Ta Is a discharging period of the capacitor until the charging voltage of the capacitor substantially reaches the voltage value Ec _min for maintaining the minimum power required to receive the information from the voltage value Ec _max , and the period ΔT is the control system of the electronic device, characterized in that the charging period of the capacitor to the charging voltage of the capacitor reaches at least the voltage value Ec _max from approximately the voltage value Ec _min. 7. The electronic device according to claim 5, wherein when the electronic device is turned on while the pause switch is on, the capacitor is constantly charged to a voltage value Ec _max by the power supply voltage from the power supply circuit, and The charging voltage value of the capacitor for holding the minimum power required for receiving information is defined as E _L , and the period Ta is defined as follows.
_H (where Ec _max > E _H > E _L ) and the discharge period of the capacitor until the voltage value E _L is almost reached. The period ΔT is defined as the time when the charge voltage of the capacitor is approximately from the voltage value E _L control system for an electronic device, characterized in that the charging period of the capacitor to reach a voltage value E _H. 8. A power supply circuit according to claim 1, further comprising a power supply circuit for generating a predetermined DC power supply voltage from an external AC voltage, wherein the power supply circuit turns on and off the AC voltage. Switch means, rectifying means for stepping down and rectifying the AC voltage via the switch means, smoothing means for smoothing the output voltage of the rectifying means, constant voltage means for making the output voltage of the smoothing means constant, When the output voltage of the smoothing means rises to a first voltage value, the switch means is turned off, and when the output voltage of the smoothing means drops to a second voltage value (<first voltage value), A control system for an electronic device, comprising: voltage detection means for turning on a switch means. 9. The control system according to claim 8, wherein the smoothing unit is a large-capacity electric double-layer capacitor.