JPH0454618A - power control device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power supply device, and more particularly to a power supply control device that controls the power supply voltage supply operation in a software manner.

[Summary of the invention] The power supply control device of the present invention is a device that controls the turning off operation of the power supply voltage supplied to a computer device, etc., and monitors the execution state of application software and detects when the power switch is turned off. However, if the computer device, etc. is running the application software, the power supply voltage is continued to be supplied, the user is notified that the application software is running, and the power supply voltage is stopped after the execution is finished. By stopping the application software, execution of the application software is protected, and the user can cancel the erroneous operation in response to this notification, thereby improving operability.

[Prior Art] Conventionally, a power supply device for supplying operating power to the internal circuits of a computer device, etc. responds to the on/off of a power switch, and when it is turned off, the supply of power supply voltage is stopped at that point. is configured to do so. In this case, a light emitting diode or the like is used to indicate the power supply state.

Such a power supply device stops supplying power supply voltage at that point when the power switch is turned off even if the computer device is running application software. If the power switch of a computer device is turned off due to an erroneous operation, not only will the application software not be processed to the end, but the processing at that time will become undefined. Therefore, with conventional power supply devices,
It is configured such that the supply of power supply voltage is turned off by continuing to operate the power switch for a predetermined period of time or more.

In addition, especially when computer equipment forms a network, the supply of power supply voltage is stopped not only when the power switch is turned off, but also when a command or key for turning off is input manually. .

[Problems to be Solved by the Invention] However, in the power supply device as described above, when an operation for stopping the supply of power supply voltage is performed, the supply of power supply voltage is stopped even if application software is being executed. Therefore,
The processing at that time is undefined.

This is because the power supply device determines whether or not the supply of power supply voltage has stopped, regardless of the execution state of the application software on the computer device. be.

Then, even if the power supply device is operated to turn off the power supply voltage, if the computer device, etc. is processing, the power supply voltage is continued to be supplied so that the processing can continue, and the processing is completed. It is obvious that the supply of power supply voltage can be stopped later.

Furthermore, if the user can be notified by some means that such a situation has occurred, the user will be able to notice it and immediately turn the power switch back on to cancel the erroneous operation. .

An object of the present invention is to supply power according to the operating state of a load, and also to be able to notify that a power switch has been turned off during operation.

[Means to solve the problem] The means of the present invention are as follows.

l) A power supply voltage supply means 1 (see the functional block diagram of FIG. 1, the same applies hereinafter) that selectively supplies a power supply voltage to a load according to the operation of a power switch, for example, supplying a drive power supply voltage to each component device. It consists of a power supply circuit.

2) A stop instruction signal generating means 2 that detects the supply stop operation of the power switch and generates a stop instruction signal, for example, is composed of a toggle flip 70-tub circuit that reverses the output level by turning the power switch on/off. Ru.

3) Guard signal generating means 3 that generates a power guard signal indicating that a power supply voltage should be supplied in accordance with the operating state of the load, for example, a CPU that generates a signal indicating that application software is in an execution state. Consists of.

4) The power supply means is connected to receive the stop instruction signal and the power guard signal, and when the stop instruction signal is received while the power guard signal is being received, the power supply means is connected to the power supply means until the power guard signal is no longer received. On the other hand, a power supply control means 4 that continues to supply the power supply voltage to the load is constituted by, for example, a processing circuit that calculates the logical sum of each signal.

5) Further, a notification means 5 is provided, which is connected to receive the stop instruction signal and the power guard signal, and makes a predetermined notification when the stop instruction signal is received while the power guard signal is being received.

This includes, for example, a light emitting diode and lighting the light emitting diode according to an instruction signal from the CPU.

It consists of a control circuit that turns the light on and off.

[Effect] The operation of the means of the invention is as follows.

When the power supply control means 4 receives a stop instruction signal indicating that the power switch is turned off from the stop instruction signal generation means 2, the power supply control means 4 generates a guard signal from the guard signal generation means 3 indicating that the application software of the load is in the execution state. When the signal is input, the power supply means 1 is made to supply the power supply voltage to the load until the guard signal is no longer input,
Furthermore, when the stop instruction signal is input from the stop instruction signal generation means 2, the notification means 5 causes an LED to indicate that the guard signal is being input from the guard signal generation means 3.
Notify the user by blinking, etc.

Therefore, it is possible to supply power according to the operating state of the load, and to notify that the power switch has been turned off during operation.

[Embodiment 1] Hereinafter, the configuration of an embodiment of the power supply control device will be described with reference to FIG. 2.

In this configuration, first, the power switch 11, which is a pushbutton switch that does not lock, is connected to a toggle flip-flop circuit (
It is connected to an input terminal T of 12 (hereinafter referred to as a toggle F/F), and a switch signal is input in response to pressing of the power switch 11.

The toggle F/F inverts the state of the Q output according to the switch signal. An instruction signal as the Q output of the toggle F/F 12 is input to the input terminal a of the control section 13.

Further, the input terminal 14 is connected to a computer device (not shown), from which a guard signal indicating whether or not application software is being executed is applied. The guard signal is at the "H" level when the application software is being executed, and is at the "L" level when the application software is not being executed. This guard signal is input to the input terminal of the control section 13.

From the output terminal C of the control section 13, a control signal for supplying or stopping power is sent to the power supply circuit 15.
is input. Here, the control unit 13 controls, for example, OR (
The control signal for controlling the stop of power supply to the power supply circuit 15 is obtained by logically ORing the instruction signal and the guard signal described above.

Furthermore, the power supply circuit 15 is connected to a load (including the computer device, etc.) 16, and supplies power to the load 16 in response to the control signal.

Further, an LED control section 17 that controls light emission of a light emitting diode (hereinafter referred to as an LED) 18 is connected so that the instruction signal and the guard signal are inputted thereto. This LE
The D control unit 17 turns the LED 18 on and off or off depending on the combination of the "L" and "H" levels of the respective input signals, as will be described later.

Next, the operation of the power supply control device described above will be explained with reference to the time chart shown in FIG.

First, during period A, power is not supplied to the load.

In other words, the power switch is not operated and the toggle F/F
The instruction signal from the controller 12 is at the "L" level, and since the application software is not being executed, the guard signal is also at the "L" level.Therefore, the control signal from the control section 13 is also at the "L° level," and the power supply circuit Power is not supplied from 15 to the load, and LED 18 is not lit either.

Next, in period B, in response to pressing the power switch 11 once,
- At times, the switch signal becomes "H" level (indicated by the symbol d in the figure, the same applies hereinafter), and the instruction signal from the toggle F/F 12 becomes "H" level (e). As a result, the control signal from the control section 13 becomes the "H" level (f) because the logical sum of both signals is taken, and the power supply circuit 15
Power is supplied to the load 16 from (g). Also, the LE
D18 is turned on (h) under the control of the LED control section 17 in response to these two signals. After this, the application software is executed, and the guard signal becomes the "H" level or the "L" level depending on the execution state of the application software. However, since the instruction signal is at the "H" level, power is always supplied to the load 16.

Next, period C shows a case where the power switch 11 is pressed down while the application software is being executed (when the guard signal is at "H" level. In response to the depression of the power switch 11, -
At times, the switch signal becomes "H'" level (i), and this switch signal causes the instruction signal from the toggle F/F 12 to become "L2 level (j). However, when the guard signal is at "H" level, Therefore, the control section (OR
The control signal from circuit) 13 is “H”.

Maintain the level and do not interrupt the power supply.

As will be described later, the LED 1g changes from a lit state to a blinking state (indicated by a dotted line) to notify the user that the power switch has been operated while the application software is being executed.

Therefore, if the operation of the power switch is due to an error, the user will know from the flashing of this LED that the operation has been erroneous, and can cancel the erroneous operation by operating the power switch again. That is, even if an operation is performed to stop the power supply, the state of the power supply device can be returned to normal operation (period B) by canceling the instruction signal to stop the power supply.

However, if the power switch is not pressed during period C, the next period is started. During this period,
When the execution of the application software is finished and the guard signal becomes "L° level (m)," the control signal from the control section 13 becomes "L# level (n)," and the control signal from the power supply circuit 15 becomes "L# level (n)." The power supply to the load is stopped (p), and the LEDlg is turned off (q).

Here, the fourth section showing the operation of the LED control unit 17 shows how the above-mentioned lighting 9 blinking and turning off of the LED lg is performed.
The explanation will be given according to the flowchart shown in the figure.

First, it is determined whether the instruction signal from the toggle F/F 12 is at the "H" level (step S1). If the instruction signal is at the "H" level (YES), the LED lg is turned on (step S2).

However, if the instruction signal is at the “L” level in the above judgment (
No), it is determined whether the guard signal is at "H" level (step S3). If the guard signal is at "H" level (YES), the LED 18 is made to blink (
Step S4).

Then, when the guard signal becomes "L" level,
The LED 18 is turned off (step S5).

As explained above, when the power switch of the present invention is operated while the application software is running, the power supply control device of the present invention continues to supply power until the application software is finished running. You can turn off the power without having to be careful. Furthermore, even if an erroneous operation is performed, the execution of the application software can be protected.

If the power switch is operated while the application software is running, the LED will blink to notify the user, so if this is due to an erroneous operation,
The user can also cancel the erroneous operation.

Also, for example, the OR circuit used in the control section can be replaced with a NAND circuit, and the blinking display of the light emitting diode can be changed to
It can be easily displayed on RT.

In this embodiment, the load is disclosed as a computer device, but any load having a control system corresponding to application software can easily be applied and implemented.

[Effects of the Invention] According to the present invention, the power-off operation can be easily performed regardless of the execution state of the load operation. Furthermore, even if a user accidentally turns off the power switch of a load such as a computer device, if the computer device or the like is running application software, the execution of the application software can be protected.

In addition, even if the user is notified of an erroneous operation, the power supply will not be stopped while the application software is running, so by canceling the power supply stoppage within this period, the user can return to the normal (operating) state. The erroneous operation can be canceled.

[Brief explanation of the drawing]

FIG. 1 is a functional block configuration diagram of the present invention, FIG. 2 is a block diagram showing the configuration of a power supply control device according to an embodiment, and FIG. 3 is a block diagram for explaining the operation of the power supply control device of FIG. The time chart and FIG. 4 are flowcharts for explaining the operation of the LED control section. DESCRIPTION OF SYMBOLS 1... Power supply means, 2... Stop instruction signal generation means, 3... Guard signal generation means, 4... Power supply control means, 5... Notification means.

Claims (2)

[Claims] (1) power supply voltage supply means for selectively supplying power supply voltage to a load according to the operation of a power switch; and stop instruction signal generation means for detecting a supply stop operation of the power switch and generating a stop instruction signal; guard signal generating means for generating a power guard signal indicating that a power supply voltage should be supplied in accordance with the operating state of the load; power supply control means for causing the power supply means to continue supplying power supply voltage to the load until the power supply guard signal is no longer received when the stop instruction signal is received while receiving the power supply guard signal; Characteristic power control device. (2) It is characterized by comprising a notification means connected to receive the stop instruction signal and the power guard signal, and makes a predetermined notification when the stop instruction signal is received while the power guard signal is being received. The power supply control device according to claim (1).