JPH05119873A - Automatic power turning off method for computer - Google Patents

Abstract

PURPOSE:To automatically turn OFF the power of a computer operated by an operator when the operator is truly absent. CONSTITUTION:A distance measuring instrument 1 is provided on a computer. By an operator absence judging function 5, the distance up to a place where an object such as humans is present on the front surface of a display 2 and the change of the distance are judged, and thus, the absence of the operator is detected. Further, by a non-input judging function 7, the non-input of the constant time from an input device 3 is judged. By a turning-OFF deciding function 8, the judgement of two these judgment functions is established together, then, the power is turned OFF. Thus, the misoperation is less than a conventional method and the power can be automatically turned OFF.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for automatically shutting off power to a computer, and more particularly to a method for automatically shutting off power to a computer in a field of use where a computer directly operated by a human.

[0002]

2. Description of the Related Art A conventional automatic power-off method for a computer uses a method of detecting a state in which no input is made from an input device such as a keyboard for a certain period of time and turning off the power.

[0003]

In the above-described conventional automatic power-off method for a computer, the power source is turned off after a certain period of time while an operating person looks at the information displayed on the display device and considers it. There was a problem of being disconnected.

[0004]

SUMMARY OF THE INVENTION An automatic power-off method for a computer according to the present invention is an automatic power-off method for a computer that has an input device such as a keyboard operated by a human and a display device such as a CRT. When a person detects an absence state on the front surface of the display device for a certain period of time continuously by a distance measuring device such as an optical sensor, and if there is no input from the input device for a certain period of time, the process being executed is interrupted. , The information necessary for re-running is saved and the power is automatically turned off.

[0005]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of an automatic power-off method for a computer according to the present invention. As shown in FIG. 1, 1 is a distance measuring device (optical sensor, etc.), 2 is a display device (CRT, liquid crystal display, etc.), 3 is an input device (keyboard, etc.), 4 is a computer main body, 5 is a human absence determination function. , 6 is a power-off device (keyboard, etc.), 4 is a computer main body, 5 is a human absence determination function, 6 is a power-off device,
Reference numeral 7 is a no-input judgment function, 8 is a disconnection judgment function, and 9 is judgment reference information. FIG. 1 shows the relationship between each device and each function.

First, the distance measuring device 1 constantly measures the distance from the front surface of the display device 2 to the place where an object such as a person exists. The measured distance information is transmitted to the human absence determination function 5 in the computer body 4. Then, the human absence determination function 5 determines whether the measured distance information is outside the effective distance range when the person operating the input device 3 is represented by the lower limit and the upper limit of the effective distance of the determination reference information, or
Although the distance information is within the valid distance range, the criterion information 9
Of the minimum change and the upper limit of the minute change, and the lower limit and the upper limit of the number of minute changes, the presence or absence of the minute change in the measured distance information corresponding to the human being's normal movement within the unit time is judged. When the condition of is satisfied, it is determined that a person is absent in front of the display device.

On the other hand, the no-input judging function 7 monitors the information inputted from the input device 3, and judges that the no-input state has been reached when there is no input information within a certain period of time.

Therefore, the disconnection judgment function 8 judges that the human absence judgment function 5 is absent, and the no-input judgment function 7 judges that there is no input, and the judgment information 9 indicates whether or not automatic disconnection is possible. In this case, it is determined that the power can be turned off, the computer program being processed is interrupted, the information necessary for rerunning is saved, and the power supply disconnecting device 6 turns off the power.

The judgment reference information 9 holds a reference value used by the human absence judgment function 5 and the no-input judgment function 7 for judgment. This reference value is stored in a non-volatile memory or the like that can be updated by a computer program. The lower limit and the upper limit of the effective distance, the reference time of the minute change, the lower limit and the upper limit of the minute change, the lower limit and the upper limit of the number of minute changes, the no input time, the information about whether or not the automatic cutting is possible are stored in this reference value.

As described above, the computer automatic power-off method according to this embodiment detects that the computer is not used,
The power can be turned off automatically.

[0012]

As is apparent from the above description, the method for automatically shutting down the power supply of a computer of the present invention is designed to automatically cut off the power supply when there is no problem in cutting off the power supply due to the absence of human. This has an effect that unnecessary power consumption can be saved and that the display information can be prevented from being inadvertently referred to by a third party.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a computer automatic power-off method according to the present invention.

[Explanation of symbols]

 1 distance measuring device (optical sensor, etc.) 2 display device (CRT, liquid crystal display, etc.) 3 input device (keyboard, etc.) 4 computer body 5 human presence judgment function 6 power disconnection device 7 no input judgment function 8 disconnection judgment function 9 judgment criteria information

Claims (1)

[Claims] 1. A method of automatically turning off a power supply of a computer having an input device such as a keyboard operated by a human and a display device such as a CRT, in which the human being displays the display device by a distance measuring device such as an optical sensor while the power is on. If the front panel detects an absent state for a certain period of time, and if there is no input from the input device for a certain period of time, the process being executed is interrupted, the information necessary for rerunning is saved, and the power is automatically turned on. How to turn off the computer automatically.