JPH08286787A - Power controller for information processor - Google Patents

Abstract

PURPOSE: To save power and to prolong a life by dividing the circuit of a dis play device into a standby circuit and the other main circuit and automatically interrupting the power of the main circuit even if a power switch is left in an on-state as it is when a keyboard is not operated for prescribed time. CONSTITUTION: Power is always supplied to the standby circuit 24 of the display device 2. A main circuit switch 23 is turned on and power is supplied to the main circuit 25. The display device 2 functions and data is displayed. When the keyboard 11 is depressed, an OR circuit 12 outputs a reset signal to a timer circuit 13 and continuously outputs an on-signal to a control circuit 22 for prescribed time. The control circuit 22 functions the display 2 by turning on the main circuit switch 23 and holding the state. When a state where the keyboard 11 is not depressed continues and a state where the OR circuit 12 does not output the reset signal continues for more than prescribed time that is set in the timer circuit 13, the timer circuit 13 interrupts the power of the main circuit 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply control device for an information processing device such as a computer and a word processor, and more particularly to a power supply control device for a display device using a CRT or the like.

[0002]

2. Description of the Related Art Generally, an information processing apparatus such as a computer or a word processor equipped with a display device using a CRT is provided with a main body of the information processing device and a display device after the power is turned on at the time of start of use. Both require several tens of seconds to about 1 minute of startup time.

[0003]

Therefore, if the power is turned off at the end of use of the information processing apparatus, the time required to start up the apparatus will be wasted when starting to use the information processing apparatus again. Therefore, the power is turned on manually. Also, due to the complexity of the OFF operation, even when the information processing device is not in use, it is often left in the state where the power is on,
There is a problem in that the display device consumes unnecessary power and shortens its life.

The present invention has been made to solve the above problems, and even when the information processing apparatus is not used for a preset time or more even when the power switch is turned on, the circuit of the display apparatus is An object of the present invention is to provide a power supply control device for an information processing device that saves power consumption and extends the life of a display device by automatically turning off a circuit that does not require start-up.

[0005]

A power supply control device for an information processing apparatus according to the present invention, in an information processing apparatus having a display device, operates any of the keys of the keyboard of the information processing apparatus. An OR circuit that detects and outputs a reset signal, a timer circuit that outputs an ON signal for a preset time when the reset signal is input, and a display circuit that is provided in the display device and is turned on and off by a main power switch thereof. A standby circuit, a main circuit switch provided between the main power switch and the main circuit of the display device, and a controller for controlling the main circuit switch by the output of the timer circuit are provided.

Further, the timer circuit is a timer circuit capable of changing a set time for outputting an ON signal.

[0007]

According to the present invention, the circuit of the display device is divided into a standby circuit which requires a long time to start up and other main circuits, and the power switch is kept on when the keyboard is not operated for a preset time. However, since the main circuit power is automatically shut off, it is possible to save the power consumption of the display device and extend its life.

Further, since the preset fixed time can be changed by the operation of the operator, it becomes possible to control the power supply more suited to the actual usage of the information processing apparatus.

[0009]

FIG. 1 is a block diagram showing an embodiment of the present invention. In the present embodiment, when any key of the keyboard 11 is operated and the OR circuit 12 that outputs a reset signal and the reset signal output from the OR circuit 12 are input to the information processing apparatus body 1, the reset signal is input. The display device 2 is provided with a timer circuit 13 that outputs an ON signal for a preset fixed time.
1, a control circuit 22, and a main circuit switch 23 connected to the main power switch 21 and controlled by the control circuit 22 according to the output of the timer circuit 13.

The circuit of the display device 2 is, for example, a CRT when the display device is of a type using a CRT.
Main circuit composed of a standby circuit 24 consisting only of circuits that require a relatively long time from power-on to startup, such as the heater preheating circuit, and a circuit that does not require a relatively long time from power-on to startup. The standby circuit 24 is directly connected to the main power switch 21, and the main circuit 25 is connected to the main circuit switch 23. The operation of this embodiment will be described below.

The information processing apparatus main body 1 is turned on and the main power switch 21 of the display apparatus 2 is turned on to use the information processing apparatus. In this state, the display device 2
The standby circuit 24 is always supplied with power, and when the main circuit switch 23 is turned on and power is supplied to the main circuit, the display device 2 immediately functions to display data.

When any key of the keyboard 11 is pressed, the OR circuit 12 outputs a reset signal to the timer circuit 13. When the reset signal is input, the timer circuit 13 continuously outputs the ON signal to the control circuit 22 for a preset fixed time, and the control circuit 22 turns on the main circuit switch 23 to keep the state. The display 2 is caused to function by.

When the state where the keyboard 11 is not pressed continues and the state where the OR circuit 12 does not output the reset signal continues for a predetermined time set in the timer circuit 13 or more, the timer circuit 13 outputs the OFF signal to the control circuit 22. Then, the control circuit 22 turns off the main circuit switch 23 so that the main circuit 25 of the display device 2 is powered off, and this state is maintained until the keyboard 11 is operated next.

In this way, the time set in advance in the timer circuit 13 is sufficiently longer than the operation interval of the keyboard 11 in the normal use state of the information processing apparatus and compared with the time interval when the information processing apparatus is not used. By setting it sufficiently short, the power of the main circuit 25 can be cut off when not in use for a long time, power consumption can be saved, and the life of the display device 2 can be extended without hindering normal use.

In this embodiment, an example in which a timer circuit that outputs an ON signal for a predetermined time when a reset signal is input has been described has been described, but a timer circuit that can change this set time by an operator's operation is used. This makes it possible to flexibly adapt the power supply control according to the actual usage of the information processing device, for example, in the case of performing a process that requires time for calculation and a keyboard operation interval is relatively long.

[0016]

As described above, according to the present invention, the circuit of the display device is divided into a standby circuit that requires a long time to start up and other main circuits, and even if the main power switch is in the ON state, the timer is preliminarily set. The power supply of the main circuit is automatically cut off when the keyboard is not operated for a certain period of time set in the circuit, so that the power consumption of the display device can be saved and the life of the display device can be extended. Also, when the main power switch is on, power is always supplied to the standby circuit, so power is supplied to the main circuit of the display circuit by operating the keyboard, and the display immediately functions and restarts display, which is a waste of time. Does not occur. Furthermore, by using a timer circuit that can change the set time by an operator's operation, it is possible to perform power supply control that is more suitable for the actual usage of the information processing apparatus.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

[Explanation of symbols]

 1 Information Processing Device Main Body 2 Display Device 11 Keyboard 12 OR Circuit 13 Timer Circuit 21 Main Power Switch 22 Control Circuit 23 Main Circuit Switch 24 Standby Circuit 25 Main Circuit

Claims (2)

[Claims] 1. A power supply control device for an information processing device having a display device, which is configured to detect an operation of any key of a keyboard of the information processing device and output a reset signal, the reset signal A timer circuit that outputs an ON signal for a preset period of time when is input, a standby circuit that is provided in the display device and is turned on and off by its main power switch, the main power switch and the main of the display device. A power supply control device for an information processing device, comprising: a main circuit switch provided between the main circuit switch and a circuit; and a control device for controlling the main circuit switch by an output of the timer circuit. 2. The power supply control device for an information apparatus according to claim 1, wherein the timer circuit is a timer circuit capable of changing a set time for outputting an ON signal.