JPH08241064A - Display control system - Google Patents

Abstract

PURPOSE: To provide a display control system making the security control compatible with the reduction in power consumption. CONSTITUTION: In the display control system of a computer system having an instant security function and an automatic power off function, a display memory interface control register 5 is allocated to an instant security side as a control function of stoppage and restoration of a picture display. Further, a DPMS control register 3, a DAC control part 4 and a DAC control register 6 are allocated to an automatic power off side. By effectively controlling them, both functions are operated correctly, and the security control is made be compatible with the reduction in power consumption.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display control method suitable for being applied to a computer system such as a personal computer, and more particularly, to stopping and returning of a screen display individually provided for both instant security and auto power off. The present invention relates to a display control method that efficiently controls a control mechanism to achieve both security management and reduction of power consumption.

[0002]

2. Description of the Related Art In recent years, various notebook-type and laptop-type personal computers that are easy to carry and can be operated by a battery have been developed. Further, for these personal computers, strong security management and power saving have been strongly demanded.
Therefore, in the current personal computer,
Many have instant security and auto power off functions.

This instant security is used when the user leaves his seat while using the personal computer, and when a specific key (hot key) composed of a combination of at least one key is pressed. The screen display is stopped and the subsequent reception of key input is suppressed, and when a preset password is input, the screen display is restored and the suppression of key input reception is released. That is, this allows security management to be carried out though it is simple.

On the other hand, the auto power-off is intended to save power, and when no key is pressed for more than a preset time, the screen display is stopped and the screen is displayed. The power consumption is suppressed. The display on this screen is restored when any key is pressed.

Therefore, both of the instant security and the auto power off stop the screen display. However, conventional computer systems have only one mechanism for controlling stop and return of screen display, and most of these mechanisms are managed and used on the instant security side. Therefore, when the screen display is stopped by auto power off, if the LCD display is used, the backlight is turned on,
It is possible to substitute the off control, but there is no such alternative method for the display by the CRT, and there is a problem that it is not possible to control stop and return of the screen display by the auto power off.

[0006]

As described above, the conventional computer system is provided with only one mechanism for controlling the stop and return of the screen display, and therefore is provided with both instant security and auto power off. In the case of the system, there is a problem that the CRT display cannot be stopped by auto power off.

The present invention has been made in view of the above circumstances, and a mechanism for controlling deletion and restoration of a screen display is provided independently for both instant security and auto power off, and these are efficiently controlled. By doing so, it is an object to provide a display control method that achieves both security management and reduction in power consumption.

[0008]

According to the present invention, when a specific key consisting of a combination of at least one or more keys is pressed, the screen display is stopped and the subsequent key input is suppressed, and preset. When the entered password is entered, the on-screen display is restored and the inhibition of key input acceptance is released, and when no key is pressed for more than the preset time. , A display control method for a computer system having an auto power-off function of stopping the screen display to suppress power consumption by the screen display and restoring the screen display when any key is pressed, A mechanism for controlling the stop and return of the display is provided separately for the above instant security and auto power off. The features.

Also, the present invention is provided on the auto power-off side when the password for canceling the instant security is input in a state where both the instant security and the auto power off are functioning. It is characterized in that the stop of the screen display being performed by the control mechanism is released at the same time.

Further, according to the present invention, when any key is pressed in a state where both the instant security and the auto power off function, the control mechanism provided on the auto power off side operates. The present invention is characterized in that only the stop of the screen display is released and the stop of the screen display performed by the control mechanism provided on the instant security side is continued.

[0011]

According to the configuration of the present invention, since the control mechanism for stopping and returning the screen display is provided for both the instant security and the auto power off, the CRT display can be stopped even in the case of the auto power off. Is possible.

Further, when an operation for canceling the instant security is performed while both the instant security and the auto power off functions are activated,
Not only is the stop of the screen display performed by the control mechanism on the instant security side canceled, the stop of the screen display performed by the control mechanism on the auto power-off side is released.

On the other hand, in the above-mentioned state, when the operation for canceling the auto power off is performed, the stop of the screen display executed by the control mechanism on the instant security side is left as it is and the control mechanism on the auto power off side is used. Only cancels the screen display stop that is being performed. This makes it possible to achieve both security management and reduction in power consumption without impairing operability.

[0014]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a system configuration of a personal computer according to the embodiment.

The personal computer according to the embodiment, as shown in FIG. 1, has a display controller 1 and a video R.
It includes an AM 9, a CPU 10, a BIOS ROM 11, a system memory 12, and a keyboard controller 13.

The display controller 1 includes an LCD 7 and a CR.
This is for performing display control of T8, and receives display data from the CPU 10 and writes it in the video RAM 9. The display controller 1 includes a display control unit 2, a DPMS control register 3, a DAC control unit 4, and a display memory interface control register 5.
And a DAC control register 6.

The display control unit 2 controls the entire display controller 1, and the DPMS control register 3 controls the output of a sync signal for CRT display transmitted from the display control unit 2. . In addition, DAC
The control unit 4 performs digital / analog conversion of the display signal transmitted from the display control unit 2 and transmits it to the CRT, and performs output control according to the value of the DAC control register 6.

Further, the display control unit 2 uses the LCD according to the value of the display memory interface control register 5.
The display of 7 and CRT is controlled to be erased and restored. CP
U10 is for controlling the entire system, and executes a processing target program stored in the system memory 12.

The BIOS ROM 11 is a system BIOS.
It stores S (Basic I / O System) and is composed of a flash memory so that the program can be rewritten. The system BIOS has various I / O routines executed when the power is turned on and various I / O routines.
A device driver for controlling the O device, a system management program, a setup program, and the like are included.

The system memory 12 stores an operating system, an application program to be processed, user data created by the application program, and the like.

The keyboard controller 13 is for controlling the keyboard 14, scans the key matrix of the keyboard 14 to receive a signal corresponding to a pressed key, and converts it into a predetermined key code (scan code). It is a thing.

The operation of this embodiment will be described below with reference to FIGS. FIG. 2 is a flowchart for explaining an operation when the display is turned on / off by the instant security.

When the activation of the instant security is requested, first, the backlight of the LCD 7 is turned off and L
The CD display is set to be disabled (step A1 in FIG. 2). Next, the display is suppressed by setting a predetermined value in the display memory interface control register 5 (step A2 in FIG. 2). This allows the LCD
The display of 7 and the CRT 8 is suppressed, and the power consumption by the screen display is also reduced.

On the other hand, when cancellation of instant security is requested, DPMS control registers 3 and D
The CRT display is turned on by setting a predetermined value in the AC control register 6 (step B1 in FIG. 2).
-Step B2). Suppression of CRT display by the DPMS control register 3 and the DAC control register is performed by auto power off.
That is, as a result, the suppression of the CRT display due to the auto power-off when the instant security is released is also released.

Next, the backlight of the LCD 7 is turned on and the LCD display is set to enable (step B3 in FIG. 2). Then, the display inhibition is canceled by setting a predetermined value in the display memory interface control register 5 (step B4 in FIG. 2).

As a result, the screen display of the LCD 7 and the CRT 8 is restored regardless of whether or not the auto power off is activated. FIG. 3 is a flowchart for explaining the operation when the display is turned on / off by auto power off.

When the auto power off is activated, first, D
The CRT display is turned off by setting a predetermined value in the PMS control register 3 and the DAC control register 6 (step C1 to step C in FIG. 3).
2). Next, the backlight of LCD 7 is turned off and L
The CD display is set to disable (step C3 in FIG. 3). As a result, the display on the LCD 7 and the CRT 8 is suppressed, and the power consumption by the screen display is also reduced.

On the other hand, when the auto power off is released, it is first determined whether or not instant security is being activated (step D1 in FIG. 3). (Y in step D1 in FIG. 3), the process is terminated without returning the screen display.

If instant security is not activated (N in step D1 of FIG. 3), DP
The CRT display is turned on by setting a predetermined value in the MS control register 3 and the DAC control register 6 (step D2 to step D3 in FIG. 3), and then the backlight of the LCD 7 is turned on to enable the LCD display. Set (step D4 in FIG. 3). As a result, the cancellation of the CRT display suppression by the auto power off is limited to the case where the instant security is not activated.

As described above, in the personal computer according to the embodiment, the instant security controls the display suppression and the restoration by the display memory interface control register 5, and the auto power off is DP.
MS control register 3, DAC control unit 4 and DA
The C control register 6 (15 in FIG. 1) controls display stop and return. In other words, it has a mechanism to control stop and return of screen display independently by instant security and auto power off, and by controlling these efficiently, both functions can be operated correctly and security management and power consumption can be reduced. It is possible to achieve both reduction and reduction.

[0031]

As described above in detail, according to the present invention, even in a computer system having an instant security function and an auto power off function, a mechanism for controlling stop and return of screen display is provided with the instant security and auto power off function. It is independently provided on both sides of
In addition, by efficiently controlling these, both functions can be operated correctly, and security management and reduction of power consumption can both be achieved.

[Brief description of drawings]

FIG. 1 is a diagram showing a system configuration of a personal computer according to an embodiment of the present invention.

FIG. 2 is a flow chart for explaining an operation when the display is turned on / off by the instant security according to the embodiment.

FIG. 3 is a flowchart for explaining an operation when the display is turned on / off by auto power-off according to the embodiment.

[Explanation of symbols]

1 ... Display controller, 2 ... Display control unit, 3 ... DPMS
Control register, 4 ... DAC control unit, 5 ... Display memory interface control register, 6 ... DAC
Control register, 7 ... LCD, 8 ... CRT, 9 ...
Video RAM, 10 ... CPU, 11 ... BIOS RO
M, 12 ... System memory, 13 ... Keyboard controller, 14 ... Keyboard.

Claims (3)

[Claims] 1. When a specific key consisting of a combination of at least one or more keys is pressed, the screen display is stopped and reception of subsequent key input is suppressed, and a preset password is input. In addition, the instant security function that returns the screen display and cancels the inhibition of key input acceptance, and when no key is pressed for more than the preset time, the screen display is stopped and the In a display control method of a computer system having an automatic power-off function of suppressing power consumption and restoring a screen display when any key is pressed, a mechanism for controlling stop and restoration of the screen display is provided. A display control method characterized in that the instant security and the auto power off are provided independently. 2. When both the instant security and the auto power off are functioning, when the password for canceling the instant security is entered, the control mechanism provided on the auto power off side operates. 2. The display control method according to claim 1, wherein the stop of the displayed screen display is released at the same time. 3. A screen displayed by a control mechanism provided on the auto power-off side when any key is pressed while both the instant security and the auto power-off are functioning. 2. The display control method according to claim 1, wherein only the stop of the display is released, and the stop of the screen display performed by the control mechanism provided on the instant security side is continued.