JP3270887B2 - Power supply control device using microcomputer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a control signal receiving section which receives a remote control signal from a remote operation control signal transmitting section and issues an operation control signal, and a microcomputer to which the received output signal is supplied. A microcomputer comprising: a control unit configured to perform on / off control of a power supply unit in response to an operation control signal from a control signal receiving unit based on a remote control signal from a remote operation control signal transmitting unit. The present invention relates to a power supply control device using the same.

[0002]

2. Description of the Related Art A power supply control system capable of performing on / off control of a main power supply unit in an electronic device by operating a remote controller (remote commander) attached to the electronic device has been proposed. Widely used for practical use. In such a power supply control system, an electronic device that controls the main power supply unit receives a remote control signal transmitted from a remote operation controller and generates an operation control signal based on the remote control signal. An operation control signal is supplied from a control signal receiving unit, and a power control signal is transmitted according to the operation control signal.For example, a control unit including a microcomputer is used, and a power control signal from the control unit is And a power on / off control unit for causing the main power supply unit to turn on or off in response.

[0003] The control signal receiving unit includes at least
When a remote control signal for performing on / off control of the main power supply unit is transmitted from the remote operation controller, the remote control signal is always ready to be received, and the control unit is configured to receive the remote control signal from the control signal receiving unit. When the operation control signal is supplied, it is determined whether or not the content of the operation control signal instructs on / off control of the main power supply unit, and the result of determination that the operation control signal instructs on / off control of the main power supply unit Is obtained, a power control signal for shifting the main power supply unit from the off state to the on state or from the on state to the off state is sent to the power on / off control unit. Therefore, even when the main power supply unit is in the off state, the control signal receiving unit and the control unit need to be in the operating state.

Therefore, in an electronic device in which on / off control of the main power supply unit is performed by operating a remote control unit, in addition to the main power supply unit, when the main power supply unit is in an off state, A sub-power supply unit for supplying an operation voltage to the control signal receiving unit and the control unit is provided. Accordingly, the control signal receiving unit and the control unit are supplied with the operating voltage from the sub power supply unit when the main power supply unit is in the off state, and the main power supply unit or the main power supply when the main power supply unit is in the on state. The operating voltage is supplied from both the power supply unit and the sub-power supply unit, and the operation state is always maintained.

[0005]

As described above, in an electronic device in which the on / off control of the main power supply unit is performed by operating a remote control unit, the control signal receiving unit and the control unit are always maintained in the operating state. In this case, even when the main power supply unit is turned off and the remote control signal is not transmitted from the remote control, the control signal receiving unit and the control unit always consume power. It has happened. In particular, in the control unit, for example, an oscillating unit incorporating a crystal oscillator is built in, and the oscillating unit is constantly driven, and the driving current at that time is relatively large. , Resulting in relatively large power consumption. Further, power loss occurring in the sub-power supply unit due to the supply of a current including a drive current of the built-in oscillation unit to the control unit from the sub-power supply unit cannot be ignored. That is, the main power supply is turned off due to power consumption in the control unit, power loss in the sub power supply, and the like.
In addition, when the remote control signal is not transmitted from the remote control, the energy is wasted.

In view of the above, the present invention provides an on / off control for selectively setting an on state and an off state in a main power supply unit of an electronic device by a remote operation control associated with the electronic device. Power consumption in a control unit using a microcomputer, which performs an operation for on / off control of a main power supply unit in response to a remote control signal transmitted from a remote operation controller when performing the operation based on the operation of the device. It is an object of the present invention to provide a power supply control device using a microcomputer which can effectively reduce the power consumption.

[0007]

In order to achieve the above object, a power supply control device using a microcomputer according to the present invention receives a remote control signal sent from a remote operation control signal sending unit, and receives the signal. A control signal receiving unit for generating an operation control signal according to the content of the remote control signal, and a first signal input terminal and a second signal input terminal to which an operation control signal from the control signal receiving unit is supplied. A control unit including a microcomputer that selectively takes a normal operation state in which a power control signal for a main power supply unit can be transmitted from an output terminal and a sleep state in which power consumption is reduced as compared with the control unit; In the receiving unit and the control unit,
Even when the main power supply unit is in the off state, the main power supply unit is turned on or off from the off state according to the sub power supply unit that supplies the operating voltage and the power supply control signal transmitted from the output terminal of the control unit. A power on / off control unit for switching from a state to an off state, wherein the control unit takes a sleep state in which an operating voltage is supplied by a sub power unit when the main power unit is switched from the on state to the off state, In the sleep state, when the operation control signal is detected at the first signal input terminal and the operation control signal is detected, the sleep state is released to shift to the normal operation state. Operation control signal supplied to the signal input terminal
Of the operation control signal.
Command the ON / OFF control to the main power supply
The maintains normal operating state sends out a power control signal to the main power supply to the ON state or OFF state from the output terminal to the power on-off controller, the operation control
Signals whose content instructs the main power supply to turn on / off
Otherwise, it is configured to return to the sleep state .

[0008]

In the power supply control apparatus using the microcomputer according to the present invention, the control unit is configured to use the microcomputer when the main power supply is switched from the on state to the off state. Take a sleep state. The control unit in the sleep state is supplied with an operation voltage from the sub power supply unit, is maintained in the operation state, and receives the operation control signal from the control signal reception unit in the first state.
When the signal is supplied to the signal input terminal of, the sleep state can be released and the operation to shift to the normal operation state can be performed accordingly.For example, the built-in oscillation unit is deactivated, and the oscillation unit is turned off. It is assumed that the power consumption is extremely small as compared with the normal operation state which is the operation state.

After the control unit shifts from the sleep state to the normal operation state, the operation control signal from the control signal receiving unit supplied to the second signal input terminal changes the content of the operation control signal to the main power supply unit. The main power supply is switched from an off state to an on state or an on state when it is determined whether or not the main power supply is to be commanded, and a determination result that the on / off control is directed to the main power supply is obtained. normal movement sends out a power control signal to the oFF state from the output terminal to the power on-off control unit from
Operation status, while on / off control for main power supply
If it is not possible to obtain the judgment result that
Return to the sleep state . The control signal receiving section is supplied with an operating voltage from the sub-power supply section and is constantly maintained in the operating state.

[0010] Under such circumstances, the remote control signal transmitted from the remote operation control signal transmitting section is turned on / off with respect to the main power supply section.
When the operation is to be performed for the OFF control, an operation control signal based on the remote control signal is supplied to the control unit from the control signal receiving unit, and further, the ON / OFF operation control for the main power supply unit is performed from the control unit. Is supplied to the power on / off control unit, and the power on / off control unit ensures that the operation of switching the main power supply unit from the off state to the on state or from the on state to the off state is performed. Done. When the main power supply is turned off and the remote control signal is not sent from the remote control signal sending unit, the control unit is put in the sleep state and the power consumption is kept very low. What is done. Therefore, the power consumption in the control unit including the microcomputer, which performs the operation for turning on / off the main power supply unit in response to the remote control signal transmitted from the remote operation control signal transmission unit, is effectively reduced. As a result, wasteful consumption of energy is suppressed.

[0011]

FIG. 1 shows an example of a power supply control device using a microcomputer according to the present invention, together with peripheral parts related thereto. In this example, a remote operation control signal transmitting unit 12 forming a remote operation controller attached to the electronic device 11 is provided to the electronic device 11.
In response to the above, the control signal receiving unit 13 which receives the remote control signal CR transmitted from the remote operation control signal transmitting unit 12 and generates the operation control signal PR according to the content of the received remote control signal CR is provided. Is provided.

The operation control signal PR obtained in the control signal receiving section 13 is sent to a control unit 14 using a microcomputer. Control unit 14
Has a signal input terminal TIN and a wake-up terminal TWU provided in addition to the signal input terminal TIN.
Are supplied to both the signal input terminal TIN and the wake-up terminal TWU. In addition, a power on / off switch 15 is connected to the control unit 14.

The control unit 14 using such a microcomputer incorporates, for example, an oscillating unit 14A in which a crystal oscillator is incorporated, and the oscillating unit 14A is activated to perform various control operations. Normal operation state in which the
Under the condition that A is inactive and power consumption is extremely small as compared with the normal operation state, the sleep state in which only a limited operation can be performed is selectively taken. Then, the control unit 14 sends the power control signal CS from the output terminal according to the operation control signal PR from the control signal receiving unit 13 supplied to the signal input terminal TIN in the normal operation state. I do.

The electronic apparatus 11 includes a main power supply section 16 which is included in the apparatus main body section 11A and supplies an operating voltage VP to each section of the apparatus main body section 11A.
And a sub-power supply unit 17 that supplies an operating voltage Vp to the control signal receiving unit 13 and the control unit 14. The main power supply section 16 selectively takes an on state and an off state, and generates the operating voltage VP when in the on state and does not generate the operating voltage VP when in the off state. On the other hand, the sub power supply 17 is always on, and generates the operating voltage Vp even when the main power supply 16 is off. And the main power supply unit 1
The operating voltage VP obtained from the main power supply unit 16 when the switch 6 is in the ON state is supplied to the control signal receiving unit 13 and the control unit 14 via the diode 18 in addition to the operating voltage Vp from the sub power supply unit 17.

The operating voltage VP from the main power supply 16 is, for example, 5 volts (V), and the operating voltage Vp from the sub-power supply 17 is, for example, 5 volts (V). When the control unit 14 is in the sleep state, the operating current flowing from the sub power supply unit 17 through the control unit 14 is set to, for example, about 100 microamperes (μA), and the control unit 14 is in the normal operation state. At this time, the operating current flowing from the main power supply unit 16 and the sub power supply unit 17 through the control unit 14 is set to, for example, about 10 mA (mA).

The sub power supply 17 is directly connected to a connection (connector, specifically, a plug) 20 to a commercial AC power supply for supplying the commercial AC voltage Va. Is connected to the connection unit 20 via the power on / off control unit 19. The power on / off control unit 19
Formed by a relay including a switch 19A connected between one end of the main power supply unit 16 and one end of the connection unit 20, and a drive coil 19B for causing the switch 19A to selectively turn on and off. I have. The drive coil 19B in the power on / off control unit 19 is controlled by the control unit 1
The power supply control signal CS sent from the output terminal of the control unit 14 is supplied to the drive coil 19B. When the switch 19A in the power on / off control section 19 is turned on, the main power supply section 16 is turned on. When the switch 19A in the power on / off control section 19 is turned off, the main power supply is turned off. The unit 16 is turned off.

Under the circumstances, an example of a power supply control device using the microcomputer according to the present invention includes a control signal receiving unit 13, a control unit 14, a sub power supply unit 17, and a power on / off control unit 19. Be composed. When the main power supply unit 16 in the device main body 11A is in the OFF state and the remote control signal CR is not transmitted from the remote operation control signal transmission unit 12, the control unit 14
, And is maintained in the operating state,
Put to sleep. At this time, the control signal receiving section 13 is also supplied with the operating voltage Vp from the sub power supply section 17 and is maintained in the operating state.

When the main power supply section 16 of the apparatus main body 11A is in the off state and the control unit 14 is in the sleep state, when the remote control signal transmission section 12 transmits the remote control signal CR, The remote control signal CR is received by the control signal receiving unit 13. The remote control signal CR transmitted from the remote operation control signal transmission unit 12 is 1
As shown in FIG. 2A, for example, the number of transmissions is a cascade of a plurality of packet units PCT1 to PCTn (n is an integer of 2 or more). PCT per packet
Each of 1 to PCTn has a duration of, for example, 45 milliseconds (ms).

The control signal receiving unit 13 that has received the remote control signal CR from the remote control signal transmitting unit 12
As shown in FIG. 2B, the packet units PCT1 to PCT starting from the arrival time ta of the packet unit PCT1, which is the first packet unit in the remote control signal CR.
The control unit 1 forms a pulse train signal corresponding to each content of Tn, and uses the pulse train signal as an operation control signal PR.
4 and the signal input terminal T in the control unit 14
IN and the wake-up end TWU.

At this time, the control unit 14 in the sleep state performs an operation of periodically detecting the arrival of the operation control signal PR at the wake-up end TWU. When it is detected that the operation control signal PR corresponding to the packet unit PCT1, which is the first packet unit in the remote control signal CR, has arrived, as shown in FIG.
The operation of releasing the sleep state and shifting to the normal operation state is started at time point ta, and enters the normal operation state at time point tb. Thereafter, the control unit 14 placed in the normal operation state sends an operation control signal PR corresponding to the packet unit PCT2, which is the second packet unit in the remote control signal CR, from the control signal receiving unit 13 to signal input. Wait for the end TIN to arrive.

Then, as shown in FIG. 2, at time tc, the operation control signal PR corresponding to the packet unit PCT2 which is the second packet unit in the remote control signal CR is transmitted from the control signal receiving unit 13, and Is supplied to the signal input terminal TIN, the control unit 14 in the normal operation state makes the contents of the operation control signal PR corresponding to the packet unit PCT2 in the remote control signal CR ON / OFF with respect to the main power supply unit 16. It is determined whether or not control is instructed. Thereby, the main power supply 16
The control unit 14 in the normal operation state sends a power control signal CS from the output terminal and sends it to the power on / off control unit 19. To the drive coil 19B.

At this time, the power supply control signal CS supplied from the output terminal of the control unit 14 to the drive coil 19B in the power on / off control unit 19 takes, for example, a high level to turn on the main power supply unit 16. It is assumed. Thereby, in the power on / off control unit 19, the drive coil 19B supplied with the high-level power control signal CS
The switch 19A is driven accordingly, and the switch 19A
Is turned on. As a result, as shown in FIG. 2D, the main power supply unit 16 is switched from the off state to the on state by the power on / off control unit 19 after the time point tc.

After the main power supply 16 is switched to the ON state in this manner, the operating voltage Vp
In addition, in the control signal receiving unit 13 and the control unit 14 to which the operating voltage VP from the main power supply unit 16 is supplied through the diode 18, the remote control signal CR transmitted from the remote operation control signal transmitting unit 12 receives the control signal. Each time the signal is received by the unit 13, the control unit 14 takes an operation state in which control according to the content of the operation control signal PR from the control signal receiving unit 13 supplied to the signal input terminal TIN is performed. Then, while the main power supply unit 16 is turned on, the content of the operation control signal PR from the control signal receiving unit 13 supplied to the signal input terminal TIN controls the on / off control of the main power supply unit 16. When it is determined that the command is given, the control unit 14 sends out the power supply control signal CS again from the output terminal and supplies it to the drive coil 19 </ b> B in the power on / off control unit 19.

At this time, that is, when the main power supply section 16 is in the on state, the power is turned on from the output terminal of the control unit 14.
The power supply control signal CS supplied to the drive coil 19B in the off control unit 19 has, for example, a low level in order to turn off the main power supply unit 16. As a result, in the power on / off control unit 19, the drive coil 19B to which the low-level power control signal CS is supplied drives the switch 19A accordingly, causing the switch 19A to turn off. As a result, the main power supply unit 16 is switched from the on state to the off state by the power on / off control unit 19.

The control unit 14 which has transmitted the power supply control signal CS having a low level to turn off the main power supply section 16
Then transitions from the normal operation state to the sleep state. Thereby, the state where the main power supply unit 16 in the device main body 11A is in the off state and the control unit 14 is in the sleep state is again taken.

When the main power supply unit 16 is in the off state, the control unit 14 transmits the packet unit PC in the remote control signal CR supplied to the wake-up end TWU.
After changing from the sleep state to the normal operation state according to the operation control signal PR corresponding to T1, the signal input terminal TI
When the content of the operation control signal PR corresponding to the packet unit PCT2 in the remote control signal CR supplied to the N does not instruct on / off control of the main power supply unit 16, the control unit 14 switches from the normal operation state. Transition to the sleep state again.

Further, the main power supply unit 16 is off,
When the control unit 14 is in a sleep state,
When the power on / off switch 15 connected to the control unit 14 is operated, the control unit 14 immediately shifts from the sleep state to the normal state, and
The power supply control signal CS, which is set to a high level to turn on the power supply 6, is supplied to the drive coil 19 B in the power on / off control unit 19, and the power supply on / off control unit 19 is turned on.
An operation of switching the main power supply unit 16 from the off state to the on state is performed. Also, the main power supply unit 16 is in an on state,
When the power on / off switch 15 connected to the control unit 14 is operated when the control unit 14 is in the normal operation state, the control unit 14
Immediately, the power supply control signal CS having a low level to turn off the main power supply unit 16 is supplied to the drive coil 19B in the power on / off control unit 19, and the power supply on / off control unit 19 An operation of switching the main power supply unit 16 from the on state to the off state is performed, and thereafter, the state shifts from the normal state to the sleep state.

FIG. 3 shows a case where the control unit 14 using the microcomputer uses the remote control signal CR transmitted from the remote operation control signal transmitting unit 12 as described above.
Control signal PR from control signal receiving unit 13 for receiving
4 is a flowchart showing a control program executed when power on / off control is performed on the main power supply unit 16 in accordance with the control program.

In the control program shown in the flowchart of FIG. 3, after the start, in a step 21, it is determined whether or not the operation control signal PR corresponding to the packet unit in the remote control signal CR arrives at the wake-up end TWU. When the operation control signal PR corresponding to the packet unit in the remote control signal CR has not arrived, the determination in step 21 is repeated. When it is determined in step 21 that the operation control signal PR corresponding to the packet unit in the remote control signal CR has arrived at the wake-up end TWU, it is determined in step 22 whether or not the apparatus is in the sleep state. to decide.

As a result, when in the sleep state,
In step 23, the sleep state is released, and the state shifts to the normal operation state. Also,
If the result of determination in step 22 is that the device is not in the sleep state but in the normal operation state, the process proceeds directly from step 22 to step 24. In step 24, it is determined whether the operation control signal PR corresponding to the packet unit in the remote control signal CR has arrived at the signal input terminal TIN, and the operation control signal PR corresponding to the packet unit in the remote control signal CR is determined. If not, the determination in step 24 is repeated. If it is determined in step 24 that the operation control signal PR corresponding to the packet unit in the remote control signal CR has arrived at the signal input terminal TIN, in step 25, the fetched operation control signal PR is fetched. I do.

Subsequently, in step 26, it is determined whether or not the contents of the operation control signal PR fetched in step 25 instruct the main power supply section 16 to perform on / off control. As a result, if the content of the operation control signal PR is for instructing on / off control of the main power supply section 16, it is determined in step 27 whether or not the main power supply section 16 is in the on state. When the power supply unit 16 is not in the on state but in the off state, in step 28, a high-level power control signal CS is supplied to the drive coil 19B in the power on / off control unit 19, and thereafter, the process returns to step 24. Repeat the subsequent steps.

As a result of the determination in step 27, the main power supply unit 1
When 6 is in the ON state, in step 29,
The power supply control signal CS having a low level is supplied to the drive coil 19B in the power on / off control unit 19. Then, in step 30, the normal operation state is shifted to the sleep state, and the process returns to step 21.

On the other hand, if the result of determination in step 26 is that the contents of the operation control signal PR do not instruct on / off control of the main power supply unit 16, the main power supply unit 16 is turned on in step 31. Judge whether there is
When the main power supply unit 16 is not in the on state but in the off state, in step 30, the state is shifted from the normal operation state to the sleep state, and the process returns to step 21. If the result of determination in step 31 is that main power supply unit 16 is on, in step 32 operation control signal PR
The control operation according to the contents of step 2
Return to step 4, and repeat the subsequent steps.

[0034]

As is apparent from the above description, in the power supply control device using the microcomputer according to the present invention, the microcomputer is used when the main power supply is switched from the on state to the off state. The control unit is configured to take a sleep state. When the operation control signal from the control signal receiving unit is supplied to the first signal input terminal, the control unit that takes the sleep state releases the sleep state accordingly. Then, the operation for shifting to the normal operation state can be performed, but the power consumption is extremely small as compared with the normal operation state. In addition, the control unit that has shifted from the sleep state to the normal operation state,
When the operation control signal from the control signal receiving unit supplied to the second signal input terminal instructs on / off control of the main power supply unit, the main power supply unit is turned on from the off state or turned on. It sends a power control signal for turning off state from the state from the output terminal to the power supply on-off controller
Together with the normal operation state, and the second signal
Operation control signal from control signal receiver supplied to input terminal
Does not command on / off control for the main power supply.
If not, it returns to the sleep state .

Under these circumstances, when the remote control signal transmitted from the remote operation control signal transmitting section is used to perform an operation for on / off control of the main power supply section, the control signal reception is performed. An operation control signal based on the remote control signal is supplied from the control unit to the control unit as a command for on / off control of the main power supply unit, and power control for performing on / off operation control of the main power supply unit from the control unit is performed. The signal is supplied to the power on / off control unit, and the power on / off control unit reliably performs an operation of switching the main power supply unit from the off state to the on state or from the on state to the off state. When the main power supply is turned off and the remote control signal is not sent from the remote control signal sending unit, the control unit is put in the sleep state and the power consumption is kept very low. The main power supply is turned on / off in response to a remote control signal sent from the remote operation control signal sending unit.
Power consumption in a control unit using a microcomputer, which performs an operation for turning off the power, is effectively reduced, and wasteful energy consumption is suppressed.

[Brief description of the drawings]

FIG. 1 is a block connection diagram showing an example of a power supply control device using a microcomputer according to the present invention, together with peripheral parts related thereto.

FIG. 2 is a time chart for explaining the operation of the example shown in FIG. 1;

3 is a flowchart showing an example of a control program executed when the control unit in the example shown in FIG. 1 performs power on / off control for a main power supply unit.

[Explanation of symbols]

 REFERENCE SIGNS LIST 11 electronic device 11A device main unit 12 remote operation control signal transmitting unit 13 control signal receiving unit 14 control unit 15 power on / off switch 16 main power supply unit 17 sub power supply unit 18 diode 19 power on / off control unit 19A switch 19B drive coil 20 Connecting part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H04Q 9/00-9/16 H02J 13/00

Claims (4)

(57) [Claims] A control signal receiving section for receiving a remote control signal transmitted from a remote control signal transmitting section and generating an operation control signal in accordance with the content of the received remote control signal; Is supplied with the operation control signal from the first
A normal operation state in which a power control signal for the main power supply unit can be transmitted from an output terminal, and a sleep state in which power consumption is reduced as compared with the normal operation state. A control unit including a microcomputer that selectively takes the following; a sub-power supply unit that supplies an operating voltage to the control signal receiving unit and the control unit even when the main power supply unit is in an off state; A power on / off control unit that switches the main power supply unit from an off state to an on state or from an on state to an off state in accordance with a power control signal transmitted from an output end of the control unit; When the main power supply unit is switched from the on state to the off state, the sleep state in which the operating voltage is supplied by the sub power supply unit is obtained. In the above, when the operation control signal is detected at the first signal input terminal and the operation control signal is detected, the sleep state is released to shift to the normal operation state. The content of the operation control signal supplied to the second signal input terminal is determined, and as a result of the determination,
The operation control signal is turned on / off by the main power supply.
When those that direct the delivery Then together the power control signal for the main power supply unit to the on state or the off state to the power on-off control unit from the output terminal
The normal operation state is maintained at
The content instructs the above main power supply unit to perform on / off control.
A power supply control device using a microcomputer, wherein the power supply control device returns to the sleep state when not present . 2. The control unit has a built-in oscillating unit,
2. The microcomputer according to claim 1, wherein the oscillating unit is set to an operation state when the control unit is in a normal operation state, and is set to a non-operation state when the control unit is in a sleep state. Power control unit. 3. The control unit according to claim 1, wherein when the main power supply is in an on state, the operating voltage is supplied by the main power supply in addition to the supply of the operation voltage by the sub power supply. A power supply control device using the microcomputer according to claim 1. 4. A remote control signal received from a remote control signal transmitting section, which is received by a control signal receiving section, has a signal configuration in which packet units are connected.
In response to an operation control signal corresponding to a first packet unit of the remote control signal, an operation of releasing a sleep state and shifting to the normal operation state is performed, and a second and subsequent packets of the remote control signal are performed. In response to an operation control signal corresponding to the unit, an operation of transmitting a power control signal for turning on or off the main power supply unit from the output terminal to the power on / off control unit is performed. A power supply control device using the microcomputer according to claim 1.