JP5334562B2 - Information processing apparatus, information processing method, and program - Google Patents

Description

The present invention relates to a technique for setting a time from a final operation time until a final screen is shifted to a non-display state.

  In recent years, with the enforcement of the Personal Information Protection Law, there is a growing interest in improving security in order to prevent leakage of information to the outside.

  However, there is a case where the management system is strengthened by increasing the security, and the operation is hindered. Therefore, it is preferable that the security is automatically improved without much awareness of the user.

  Generally used information terminals have an automatic suspend (or auto-lock) function. This detects that the user has not been operated for a certain period of time, suspends the computer, and requires a password to return. This is known as a function that guards for a certain period of time so that when a user leaves his / her seat, a third party can steal data that he or she is working on, or restrict users from impersonating the user. . However, the time until this suspend is a constant value at the information terminal, and it is not related to the situation of the information terminal.

  Therefore, Patent Document 1 adopts a method of improving the security by changing the time to suspend by automatically changing the suspend time according to the time zone during the day.

Japanese Patent Application No. 9-229188

  However, since the user uses it flexibly and the program and contents to be used are switched every moment, it is practically difficult to accurately grasp the state of the information terminal only by the determination based on the above time zone.

  Furthermore, depending on the displayed screen, the amount of data such as personal information and confidential information, confidentiality, etc. differ, so it is difficult to prevent information leakage even if the suspend time is simply changed according to the time zone. .

The object of the present invention is to set the time from the last operation time until the display of the display unit on which the final screen is displayed to the non-display state for each screen ID of the screen displayed on the display unit by the process to be started. The time corresponding to the screen ID of the screen displayed on the display unit by the process being activated and correspondingly acquired is acquired, and the acquired time is obtained from the last operation point of the display unit on which the final screen is displayed. Set the time until the display shifts to the non-display state, and when the elapsed time from the last operation time to the current time reaches the set time, the display of the display section where the final screen is displayed shifts to the non-display state The purpose is to improve security by giving instructions .

The information processing apparatus of the present invention is an information processing apparatus including a display unit that displays a screen by a process to be activated, and performs a final operation for each screen ID of the screen displayed on the display unit by the process to be activated from the time management means for final screen managed correspondingly the time until shifting to the non-display state to the display of the display unit which is displayed and the screen ID of the screen displayed on the display unit by running processes obtaining means for obtaining from said management means the time corresponding to the time acquired by the acquisition unit, from the final operation time, the display of the display unit final screen is displayed until shifting to the non-display state setting of the setting means and the final elapsed time from the operation time to the current time and counting means for counting the elapsed time measured by the clock means is said setting means for setting a time When it reaches the time, and having an instruction unit for instructing to shift the display of the display unit final screen is displayed on the non-display state, the.
An information processing method of the present invention is an information processing method performed by an information processing apparatus including a display unit for displaying a screen by the process started by the process wherein the startup screen displayed on the display unit For each screen ID , the management step correspondingly manages the time from the last operation time until the display of the display unit on which the final screen is displayed to the non-display state is managed by the management means, and the process being activated an acquisition step of acquiring a time corresponding to the screen ID of the screen displayed on the display unit from the management unit, the time acquired by the acquisition step, from the last operation time, the display unit final screen is displayed timekeeping step for measuring a setting step of setting a time until shifting the displayed non-display state, the elapsed time from the last operation time to the current time , When the elapsed time counted by said time counting means has reached a time set by the setting unit, and an instruction step of instructing to shift the display of the display unit final screen is displayed on the non-display state, the It is characterized by including.
A program according to the present invention is a program for causing a computer that controls an information processing apparatus including a display unit to display a screen according to a process to be started, to be displayed on the display unit by the process to be started. For each screen ID , a management step for managing the time from the last operation time until the display of the display unit on which the final screen is displayed to the non-display state is managed by the management means, and an active process An acquisition step of acquiring a time corresponding to the screen ID of the screen displayed on the sign unit from the management unit, and the display unit on which the final screen is displayed from the time point of the final operation of the time acquired by the acquisition step. total configuration and the step, the elapsed time from the last operation time up to the present time to set the display as the time until shifting to the non-display state And a command for instructing to shift the display of the display unit on which the final screen is displayed to a non-display state when the elapsed time counted by the timing step reaches the time set by the setting step And causing the computer to execute the steps .

According to the present invention, for each screen ID of the screen displayed on the display unit by the process to be activated, the time from the last operation point to the transition of the display of the display unit on which the final screen is displayed to the non-display state is set. The time corresponding to the screen ID of the screen displayed on the display unit by the process being activated and correspondingly acquired is acquired, and the acquired time is obtained from the last operation point of the display unit on which the final screen is displayed. Set the time until the display shifts to the non-display state, and when the elapsed time from the last operation time to the current time reaches the set time, the display of the display section where the final screen is displayed shifts to the non-display state It is possible to improve security by giving an instruction to do so.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments to which the invention is applied will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a block diagram schematically showing a hardware configuration of an information processing apparatus 200 according to an embodiment of the present invention.

  In FIG. 1, the CPU 201 comprehensively controls each device and controller connected to the system bus 204.

  Further, the ROM 202 or the external memory 211 is necessary for realizing a function executed by a basic input / output system (BIOS) that is a control program of the CPU 201, an operating system program (hereinafter referred to as OS), or a server or each client. Various programs to be described later are stored.

  The RAM 203 functions as a main memory, work area, and the like for the CPU 201. The CPU 201 implements various operations by loading a program necessary for execution of processing into the RAM 203 and executing the program.

  An input controller (input C) 205 controls input from a pointing device such as a keyboard 209 or a mouse (not shown).

  A video controller (VC) 206 controls display on the display 210. The display 210 may be a CRT display or a liquid crystal display.

  The memory controller (MC) 207 is a hard disk (HD) or floppy (registered trademark) disk (registered trademark) (registered trademark) that stores a boot program, browser software, various applications, font data, user files, editing files, various data, and the like. FD) or PCMCIA card slot is controlled via an adapter to control access to an external memory 211 such as a CompactFlash (registered trademark) memory.

  A communication I / F controller (communication I / FC) 208 is connected to and communicates with an external device via the network 105, and executes communication control processing in the network. For example, Internet communication using TCP / IP is possible.

  Note that the CPU 201 enables display on the display 210 by executing outline font rasterization processing on a display information area in the RAM 203, for example.

  Further, the CPU 201 enables a user instruction with a mouse cursor (not shown) on the display 210.

  A program for realizing the present embodiment is recorded in the external memory 211 and is executed by the CPU 201 by being loaded into the RAM 203 as necessary.

  Furthermore, various data and various tables used by the program according to the present embodiment are stored in the external memory 211, and a detailed description thereof will be described later.

  FIG. 2 is a diagram illustrating a module configuration executed by the information processing apparatus 200. The modules 301, 302, 303, 304, 305, and 306 in the figure are stored in the external memory 211, and the CPU 201 loads them into the RAM 203 and executes them.

  The basic OS 301 is a generally known basic OS program. The screen ID non-corresponding program 302 is a general program module that makes it impossible to change the suspend time in units of screens. Specifically, the program module does not have the flowchart processing of FIG.

  The screen ID corresponding program 303 is a program module having a function that allows the suspend time to be changed in units of screens. Specifically, it is a program module having the flowchart processing of FIG.

  The suspend time acquisition program 304 is a program module for acquiring the suspend time for each process. Specifically, it is a program module having the flowchart processing of FIG.

  The suspend time setting program 305 is a program module for setting the suspend time. Specifically, it is a program module having the flowchart processing of FIG.

  The automatic suspend program 306 is a program module that the basic OS 301 has. Note that the automatic suspend program 306 may be included in the basic OS 301 or an application, but a part of processing differs depending on whether the basic OS 301 has or an application. This will be described later.

  FIG. 3 is a flowchart showing the flow of the process unit suspend time acquisition process in the present embodiment. 3 is realized by the CPU 201 loading the suspend time acquisition program 304 stored in the external memory 211 into the RAM 203 and executing it.

  First, in step 101, the CPU 201 acquires the start or end of a process and the process name from the basic OS 301.

  In subsequent step 102, the CPU 201 determines whether to start or end the process acquired in step 101. In the case of activation, the process branches to step 103. If completed, the process branches to step 106 described later.

  In step 103, the CPU 201 searches the monitoring process table shown in FIG. 7 using process name = (process name acquired in step 101) and screen ID = Default as keys.

  Here, the monitoring process table shown in FIG. 7 includes items of process name, screen ID, and suspend time, and the process name and the screen ID are used as composite keys. The monitoring process table is a configuration that is an application example of the management means of the present invention.

  In executing the processing of this embodiment, the process name to be monitored and its suspend time are set in advance in this monitoring process table. At this time, a record whose value of the screen ID item is Default per process is essential. Further, when changing the suspend time in units of screens, the screen ID is set with a value other than Default with the same process name, and each suspend time is stored.

  Note that the monitoring process table is stored in the external memory 211 and is nonvolatile. The table format may be a general database table or any format such as CSV format or fixed-length text format. As an example, FIG. 9 shows an image of a monitoring process table registration screen.

The monitoring process table registration screen shown in FIG. 9 will be described below.
FIG. 9 shows a user interface for adding, modifying, and deleting the monitoring process table held in the external memory 211. It is assumed that the user operates the KB 209 and the display 210 (also serving as a touch panel) and registers necessary information in advance. That is, the user inputs a process name, a screen ID, and a suspend time in association with each other via an interface as shown in FIG. 9 and presses a registration button 901 to register these associations in the information processing apparatus 200. can do. The registration screen may not be a database access as shown in FIG. 9, but may be CSV editing of spreadsheet software or fixed-length text file editing of a text editor.

  In step 104, the CPU 201 determines whether or not the corresponding record is searched in step 103. As a result of the determination, if it is determined that the corresponding record is retrieved from the monitoring process table, the process proceeds to step 105. On the other hand, if it is determined that the corresponding record has not been searched, the process proceeds to step 109.

  In step 105, the CPU 201 adds the retrieved record to the running process table (FIG. 8) using only the process name of the retrieved record as a key. If it is determined that the process name of the retrieved record is already stored in the active process table (FIG. 8), the process already stored in the active process table (FIG. 8). Overwrite the record with the name with the found record. Step 105 is a processing example of the acquisition unit of the present invention.

  Here, the running process table shown in FIG. 8 includes items of process name, screen ID, and suspend time, and the process name is a main key. The active process table is held on the RAM 203, and all the contents are cleared when the information processing apparatus 200 is subjected to termination processing such as shutdown or restart.

  In step 106, the CPU 201 searches the running process table using the terminated process name as a key.

  In step 107, the CPU 201 determines whether or not the corresponding record is searched in step 106. As a result of this determination, if it is determined that the corresponding record is retrieved from the running process table, the process proceeds to step 108. On the other hand, if it is determined that the corresponding record has not been searched, the process proceeds to step 109 described later.

  In step 108, the CPU 201 deletes the record searched in step 106 from the running process table (FIG. 8).

  In step 109, the CPU 201 is in a standby state until it acquires the start or end of the process in step 101.

  FIG. 4 is a flowchart showing the flow of the screen unit suspend time acquisition process in the present embodiment. 4 is realized by the CPU 201 loading the screen ID correspondence program 303 stored in the external memory 211 into the RAM 203 and executing it.

  First, in step 131, the CPU 201 determines the operation of the KB 209 and the display 210 (also serving as a touch panel) or initial display, and makes a general screen drawing request.

  In the following step 132, the CPU 201 acquires the screen ID requested to be drawn in step 131 from the information in its own program.

  In the following step 133, the CPU 201 searches the monitoring process table using process name = (own process name) and screen ID = (screen ID acquired in step 132) as keys.

  In subsequent step 134, the CPU 201 determines whether or not the corresponding record is retrieved from the monitoring process table in step 133. As a result of the determination, if the corresponding record is retrieved from the monitoring process table, the process proceeds to step 135. On the other hand, if the corresponding record is not retrieved, the process proceeds to step 136.

  In step 135, the CPU 201 adds the searched record to the active process table using only the process name of the searched record as a key. If it is determined that the process name of the retrieved record is already stored in the active process table, the process name record already stored in the active process table is searched. Update the record by overwriting. In step 136, the CPU 201 ends the flowchart process. Step 135 is a processing example of the acquisition means of the present invention.

  FIG. 5 is a flowchart showing the flow of the suspend time setting process in the present embodiment. 5 is realized by the CPU 201 loading the suspend time setting program 305 stored in the external memory 211 into the RAM 203 and executing it.

  First, in step 151, the suspend time setting program 305 for executing this flowchart processing is residently activated.

  In subsequent step 152, the CPU 201 acquires the current suspend time from the registry information of the basic OS 301.

  In the following step 153, the CPU 201 adds a record to the running process table using process name = Default and suspend time = (suspend time acquired in step 152) as keys. If it is determined that the process name of the retrieved record is already stored in the active process table, the process name record already stored in the active process table is searched. Update the record by overwriting.

  In the subsequent step 154, the CPU 201 searches for the minimum value of the suspend time in the running process table.

  In subsequent step 155, the CPU 201 acquires the current suspend time from the registry information of the basic OS 301.

  In subsequent step 156, CPU 201 compares the value acquired in step 154 with the value acquired in step 155. If they are different, the process proceeds to step 157. If they are equal, the process proceeds to step 158 described later.

  In step 157, the CPU 201 sets the value acquired in step 154 as the suspend time in the registry information of the basic OS 301. Step 157 is a processing example of the setting means of the present invention.

  In step 158, the CPU 201 sleeps for a predetermined time, and proceeds to step 154. Here, the fixed time is a value held in an external file such as an INI file (not shown) held in the external memory 211, and is read when the step 151 is started.

  Here, the automatic suspend process performed by the basic OS 301 will be described. First, the CPU 201 holds the time at which the operation of the KB 209 or the display 210 (also serving as a touch panel) was last detected, and calculates the elapsed time up to the current time. It is generally known that automatic suspend is performed when the calculated value exceeds the suspend time held as registry information of the basic OS 301.

  An example in which the automatic suspend process is implemented by using the standard function of the basic OS 301 by changing the registry information of the basic OS 301 is general, but the automatic suspend process may be performed by the method described with reference to FIG.

  It should be noted that the configuration and contents of the various data described above are not limited to this, and it goes without saying that the various data and configurations are configured according to the application and purpose. In particular, the above-described suspend time is, in a broad sense, the time from the last operation point to the time when the currently displayed screen is shifted to the non-display state so that information on the screen is not shown to other users. . Therefore, the suspend time may be read as, for example, an automatic security lock time or an automatic logout time.

  Next, a process of determining the timing for executing the suspend process by the automatic suspend program 306 and instructing the suspend process to the basic OS 301 will be described with reference to FIG.

  FIG. 6 is a flowchart showing processing executed by the automatic suspend program 306 in the present embodiment. 6 is realized by the CPU 201 loading the automatic suspend program 306 stored in the external memory 211 into the RAM 203 and executing it. The automatic suspend program 306 is a program that executes a suspend process at a set suspend time.

  First, in step 171, the CPU 201 accepts any operation from the keyboard (KB) 209, the display 201, or the like by the user.

  In subsequent step 172, the CPU 201 acquires the current system date / time (current time) from the basic OS 301 and stores it as the last operation date / time.

  In subsequent step 173, the CPU 201 obtains the current system date and time (current time) from the basic OS 301, and calculates the difference from the last operation date and time (last operation time) stored in step 172. Thereby, the time (elapsed time) when the user has not operated the information processing apparatus 200 can be calculated. This processing is a processing example of the time measuring means of the present invention. Then, the CPU 201 determines whether the time when the user has not operated the information processing apparatus 200 is equal to or longer than the suspend time acquired from the basic OS 301.

  If it is determined that the time during which the user has not operated the information processing apparatus 200 is equal to or longer than the suspend time acquired from the basic OS 301 (step 173: YES), the process proceeds to step 175. On the other hand, if it is determined that the time during which the user has not operated the information processing apparatus 200 is less than the suspend time acquired from the basic OS 301 (step 173: NO), the process proceeds to step 174.

  In step 175, the CPU 201 notifies the basic OS 301 of a suspend process execution command, and executes the process of step 176. The basic OS 301 that has received the notification of the execution command for the suspend process executes the suspend process and performs display control so that the screen displayed by the application cannot be seen. Step 175 is a processing example of the instruction means of the present invention.

  In step 174, the CPU 201 performs a sleep process for a fixed time (for example, 2 seconds) and returns the process to step 173.

  Here, the fixed time is a time (value) set in an external file such as an INI file (not shown) held in the external memory 211, and is read and set at the start of step 171.

  In step 176, the CPU 201 deletes (refreshes) the last operation date and time stored in step 172, returns to step 171, and waits for an operation from the user.

  Note that, when an operation is received by the user during execution of the processing shown in the flowchart shown in FIG. 6, the last operation date and time stored in step 172 is erased (refreshed), and the processing after step 172 is executed.

  In FIG. 6, the case where the automatic suspend program 306 instructs the basic OS 301 to execute the suspend process has been described, but the processes other than the above-described step 175 can be executed by the basic OS 301. In this case, the basic OS 301 executes all processes from step 171 to step 176 except for step 175.

  That is, the basic OS 301 determines the timing for executing the suspend process from step 171 to step 174. If it is determined that the suspend process is to be executed (step 173: YES), the basic OS 301 executes the suspend process based on the instruction from the automatic suspend program 306 in step 175 so that the screen displayed by the application cannot be seen. Control.

  In this embodiment, when the suspend time of the shortest time among a plurality of suspend times existing in the running process table of FIG. 8 is set and the elapsed time from the last operation time to the current time reaches the suspend time, the suspend time is set. The process is executed. In another embodiment, the suspend process is executed when any of the suspend times managed in the running process table of FIG. 8 reaches the elapsed time from the last operation time to the present time. You may comprise.

  Further, the monitoring process table of FIG. 7 manages the suspend time for each process and each screen ID, but the suspend time may be managed for each process or each screen ID.

  The program code group corresponding to the flowcharts shown in FIGS. 3 to 6 and the tables shown in FIGS. 7 and 8 are stored in the RAM 203 and the external memory 211. However, the RAM 203 and the external memory 211 also store information for managing the program group, such as version information, creator, etc., and information depending on the basic OS 301 on the program reading side, for example, an icon for identifying and displaying the program May also be stored.

  Furthermore, data depending on various programs is also managed in the directory. In addition, when a program or data to be installed is compressed, a program to be decompressed may be stored.

  The functions shown in FIGS. 2 to 6 in the present embodiment may be performed by a host computer by a program installed from the outside. In this case, the present invention is applied even when an information group including a program is supplied to the output device from a recording medium such as a CD-ROM, a flash memory, or an FD or from an external recording medium via a network. Is.

  According to the present embodiment, since the suspend time can be set for each startup process unit and each display screen unit, security can be improved. Therefore, in the present embodiment, a difference in automatic suspend time of a specific program such as a desktop screen display state in which the program is not executed in the information processing apparatus 200 and a mailer expected to hold a lot of personal information is provided. Can do. Therefore, it is possible to set an automatic suspend time corresponding to the state of the information processing apparatus 200. For example, even if the seat is removed while the address book of the mailer is open, the automatic suspend is performed earlier than usual. Security improvement can be expected.

  Each means and each step constituting the embodiment of the present invention described above can be realized by operating a program stored in a RAM, a ROM, or the like of a computer. This program and a computer-readable recording medium recording the program are included in the present invention.

  Further, the present invention can be implemented as, for example, a system, apparatus, method, program, or recording medium, and may be applied to an apparatus composed of a single device.

  The present invention supplies a software program for realizing the functions of the above-described embodiments directly or remotely to a system or apparatus. In addition, this includes a case where the system or the computer of the apparatus is also achieved by reading and executing the supplied program code.

  Accordingly, since the functions of the present invention are implemented by computer, the program code installed in the computer also implements the present invention. In other words, the present invention includes a computer program itself for realizing the functional processing of the present invention. In that case, as long as it has the function of a program, it may be in the form of object code, a program executed by an interpreter, script data supplied to the OS, and the like.

  Further, the functions of the above-described embodiments are realized by the computer executing the read program. Furthermore, based on the instructions of the program, an OS or the like running on the computer performs part or all of the actual processing, and the functions of the above-described embodiments can be realized by the processing.

  As another method, a program read from a recording medium is first written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer. Then, based on the instructions of the program, the CPU or the like provided in the function expansion board or function expansion unit performs part or all of the actual processing, and the functions of the above-described embodiments are also realized by the processing.

It is a block diagram which shows roughly the hardware constitutions of the information processing apparatus which concerns on embodiment of this invention. It is a figure which shows the module structure which the information processing apparatus which concerns on embodiment of this invention performs. It is a flowchart which shows the flow of the process unit suspend time acquisition process in implementation of this invention. It is a flowchart which shows the flow of the screen unit suspend time acquisition process in embodiment of this invention. It is a flowchart which shows the flow of the suspend time setting process in embodiment of this invention. It is a flowchart which shows the process which the automatic suspend program in this embodiment performs. It is a figure which shows the structure of the monitoring process table. It is a figure which shows the structure of the process table during starting. It is a figure which shows the image of the registration screen of a monitoring process table.

Explanation of symbols

200 Information processing apparatus 201 CPU
202 ROM
203 RAM
204 System Bus 205 Input Controller 206 Video Controller 207 Memory Controller 208 Communication I / F Controller 209 Keyboard 210 Display 211 External Memory 301 Basic OS
302 Screen ID non-corresponding program 303 Screen ID corresponding program 304 Suspend time acquisition program 305 Suspend time setting program 306 Automatic suspend program

Claims (6)

An information processing apparatus including a display unit that displays a screen based on a process to be started,
For each screen ID of the screen displayed on the display unit by a process wherein the activated, from the last operation time, the time of the display unit display of the last screen is displayed until shifting to the non-display state in response Management means to manage;
An acquisition unit that acquires a time corresponding to the screen ID of the screen displayed on the display unit by the process being started from the management unit;
Setting means for setting the time acquired by the acquisition means as the time from the last operation time point until the display of the display unit on which the final screen is displayed is shifted to a non-display state;
A time measuring means for measuring the elapsed time from the last operation time to the present time;
An instruction means for giving an instruction to shift the display of the display unit on which the final screen is displayed to a non-display state when the elapsed time measured by the time measuring means reaches the time set by the setting means;
An information processing apparatus comprising: The acquisition unit acquires the time corresponding to the screen ID of each screen displayed on the display unit by a plurality of running processes from the management unit, respectively.
The setting means, the shortest time among the plurality of time acquired by the acquisition unit, from the final operation time, time to final screen shifts to the non-display state the display of the display unit displayed The information processing apparatus according to claim 1 , wherein the information processing apparatus is set as follows. The acquisition unit acquires a time corresponding to the screen ID of the screen displayed on the display unit displayed by the process being started, every time the screen is displayed on the display unit from the management unit,
When the acquisition unit acquires the time corresponding to the screen ID of the screen newly displayed by the same process being activated, the setting unit displays the time displayed by the same process being activated. The information processing apparatus according to claim 1, further comprising an update unit configured to update a time set corresponding to the screen ID to a time corresponding to the screen ID of the newly displayed screen. . For each combination of a process and a screen ID of a screen displayed on the display unit by the process, the management unit shifts the display of the display unit on which the final screen is displayed to a non-display state from the time of the final operation. Time to manage,
The said acquisition means acquires the time corresponding to the combination of the process started and the screen ID of the screen displayed by the said process from the said management means, The said any one of Claim 1 thru | or 3 characterized by the above-mentioned. The information processing apparatus described. An information processing method executed by an information processing apparatus including a display unit that displays a screen of a process to be activated,
For each screen ID of the screen displayed on the display unit by the activated process , the time from the last operation time until the display of the display unit on which the final screen is displayed is changed to a non-display state is determined in the management unit. Management steps to manage correspondingly ,
An acquisition step of acquiring from the management means a time corresponding to the screen ID of the screen displayed on the display unit by a process being started ;
A setting step of setting the time acquired by the acquisition step as a time from the last operation time point until the display of the display unit on which the final screen is displayed is shifted to a non-display state ;
A time measuring step for measuring the elapsed time from the last operation time to the present time;
An instruction step for giving an instruction to shift the display of the display unit on which the final screen is displayed to a non-display state when the elapsed time measured by the time measuring means reaches the time set by the setting means;
An information processing method comprising: A program for causing a computer that controls an information processing apparatus including a display unit to display a screen according to a process to be started to be executed,
For each screen ID of the screen displayed on the display unit by the activated process , the time from the last operation time until the display of the display unit on which the final screen is displayed is changed to a non-display state is determined in the management unit. Management steps to manage correspondingly ,
An acquisition step of acquiring, from the management means, a time corresponding to the screen ID of the screen displayed on the sign unit by the process being started ;
A setting step of setting the time acquired by the acquisition step as a time from the last operation time point until the display of the display unit on which the final screen is displayed is shifted to a non-display state ;
A time measuring step for measuring the elapsed time from the last operation time to the present time;
An instruction step for giving an instruction to shift the display of the display unit on which the final screen is displayed to a non-display state when the elapsed time measured by the timing step reaches the time set by the setting step;
A program that causes a computer to execute.

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