JP2007034435A - Electronic device, file reading method, file reading program and storage medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic device capable of easily restricting reading of data, a file reading method, a file reading program and a storage medium. <P>SOLUTION: The electronic device comprises an interface to be connected with an external storage device retaining unique identification information; a storage means for storing a file of the external storage device; and a control means having an arithmetic processor 32 processing files stored in the storage means and controlling the whole device. The control means includes an identification information acquisition part 3236 acquiring the identification information of the external storage device; file storage parts 3241 and 3245 storing, when storing a file stored in the external storage device in the storage means, this file in association with the identification information of the external storage device; and a file read restriction part 3243 restricting, when reading a file stored in the storage means, reading of files stored in association with identification information different from the identification information of the external storage device connected to the interface. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention includes an interface to which an external storage device is connected, a storage unit that stores a file stored in the external storage device, and an arithmetic processing unit that processes the file stored in the storage unit. The present invention relates to an electronic device provided with a control means for controlling the above, a file reading method, a file reading program, and a recording medium that are used in the electronic equipment and read a file stored in a storage means.

2. Description of the Related Art Conventionally, a PC (Personal Computer), an image display device, and the like provided with an interface to which an external storage device is connected, storage means for storing data such as files, and control means for processing the data and controlling the entire apparatus Electronic devices are known. Since such an electronic device may be used by a plurality of people, it is necessary to prevent deletion of stored data and unnecessary reference. For this reason, many methods for restricting the reading of data stored in the storage means have been proposed for each user.
As such a method, for example, a method of inputting a password or the like, permitting access to data if the password is the same as a preset value, and denying access if the password is not the same is known. ing. In addition, a method for analyzing a user's fingerprint information instead of a password has been proposed.

  Further, in a PC, an operation restriction that allows PC operation when an external device is connected to an interface provided in the PC and rejects PC operation when the connection with the external device is released. A mechanism has been proposed (see, for example, Non-Patent Document 1). In this mechanism, the PC allows (unlocks) operations on the PC when a USB (Universal Serial Bus) device is connected by software installed on the PC, and operates on the PC when the USB device is removed. Is rejected (locked). As a result, it is possible to easily limit operations on the PC.

“Kachatsu and USB PC Lock 2 Product Information”, [online], Lifeboat Co., Ltd. [Search June 24, 2005], Internet <URL: http://www.lifeboat.jp/products/pl2/pl2 .html>

  However, the above-described data read restriction method requires a user to input a password and provide fingerprint information, and thus there is a problem that the operation is troublesome for the user. Further, the method for restricting the operation of the PC by connecting the external device (USB device) described above is a lock / unlock mechanism of the device (PC), and when the external device is connected, it is stored in the PC. Since there is no read restriction on the read data, it is necessary to further add the above-mentioned read restriction, and there is a problem that the configuration becomes complicated.

  An object of the present invention is to provide an electronic device, a file reading method, a file reading program, and a recording medium that can easily limit data reading.

  In order to achieve the above-described object, the electronic apparatus of the present invention includes an interface to which an external storage device holding unique identification information is connected, a storage unit that stores a file stored in the external storage device, and An electronic apparatus having an arithmetic processing unit that processes a file stored in the storage unit, and a control unit that controls the entire apparatus, wherein the control unit acquires identification information of the external storage device An identification information acquisition unit, a file storage unit that stores the file and the identification information of the external storage device in association with each other when the file stored in the external storage device is stored in the storage unit, and the storage unit When reading the file stored in the storage device, the file is stored in association with identification information different from the identification information of the external storage device connected to the interface. Characterized in that it comprises a file reading regulating portion for regulating the reading of files.

As such an external storage device, a memory card, a USB memory connected via a USB terminal, an optical drive such as an HDD (Hard Disk Drive), a CD (Compact Disc), and a DVD (Digital Versatile Disc), a magneto-optical disk drive In addition, examples include a magnetic disk drive and other external devices that are connected via connection terminals such as IEEE1394 and have an area in which data can be stored / read.
Examples of such identification information include serial numbers and ID numbers of external storage devices.

According to the present invention, the identification information of the external storage device connected to the electronic device can be used as an index for reading permission of the file stored in the storage means from the external storage device, and stored from another external storage device. Reading restrictions can be applied to files stored in the means.
That is, when saving a file from the external storage device to the storage unit, the file storage unit stores the file in the storage unit in association with the identification information of the external storage device acquired by the identification information acquisition unit of the control unit. . When the file stored in the storage unit is read with the external storage device connected to the interface, the file is stored in association with the identification information based on the identification information of the external storage device connected to the interface. While the read file is read, reading of the file stored in association with the identification information of the other external storage device is restricted by the file read restriction unit.

  According to this, at the time of reading the file stored in the storage means, by connecting an external storage device, the file is stored in association with other identification information different from the identification information of the external storage device. File reading can be restricted. Therefore, it is possible to easily limit the reading of a file associated with identification information different from the identification information of the connected external storage device.

In the present invention, it is preferable that the control unit includes a restriction selection unit that selects whether or not to set the file reading restriction by the file reading restriction unit when the file storage unit saves the file.
According to the present invention, when saving a file from the external storage device to the storage means, whether or not to allow the saved file to be read by the restriction selection unit when another external storage device is connected is determined. You can choose. Here, when the read restriction is not set, the saved file is not subject to the read restriction by the file read restriction unit even when another external storage device is connected to the interface. Reading can be enabled.
According to this, since it is possible to select whether or not the read restriction is set by the restriction selection unit, reading is performed even when another external storage device is connected or when no external storage device is connected. Possible files can be generated in the storage means. Therefore, the versatility of file management on the storage means can be improved.

  In the present invention, the storage means stores a management table in which storage destination information of a file stored from the external storage device and identification information of the external storage device correspond to each other, and the file storage unit stores the external storage device It is preferable to include a storage file storage unit that stores the file stored in the apparatus in the storage unit, and an association information registration unit that registers the storage destination information of the file and the identification information in association with the management table. .

  Here, as the storage destination information, when the storage unit has a hierarchical file system, a path indicating a location where the file is stored can be exemplified. When the storage destination information is a path, the path may be an absolute path or a relative path from a predetermined folder. Furthermore, when the file storage destination is a storage unit existing on the network, the storage destination information can be a URL (Uniform Resource Locator).

  According to the present invention, the association information registration unit stores the storage destination information in the storage unit of the file stored in the storage unit from the external storage device and the identification information of the external storage device stored in the storage unit. Registered in the table. According to this, the storage destination information of the file and the identification information can be easily associated with each other, and the file can be prevented from being damaged as compared with the case where the identification information is given to the file itself. Furthermore, when reading a file on the storage means, it is not necessary to determine whether each file is associated with the identification information of the connected external storage device, so that the processing can be reduced. In addition, the search speed of a readable file can be improved.

In the present invention, it is preferable that the control unit includes a management table editing unit that edits a correspondence relationship between the storage destination information and the identification information on the management table.
According to the present invention, the management table editing unit can edit the correspondence between the storage destination information of the file and the identification information. Therefore, the file that can be read when the external storage device is connected and the read restriction are applied. You can change the file. For example, a file stored in a storage unit saved from a certain external storage device can be read when another external storage device is connected. According to this, it is possible to set a plurality of external storage devices that can place read restrictions on the same file on the storage means. Therefore, file management can be facilitated and the versatility of the electronic device can be expanded.
In particular, such an effect is effective when there are a plurality of users for the electronic device and it is desired to apply read restrictions on the same file to each user.

In the present invention, it is preferable to include a master registration unit that registers master identification information capable of reading almost all files stored in the storage unit regardless of the association between the identification information and the file.
According to the present invention, the master registration unit can set a function as a master that does not place a read restriction on almost all files on the storage unit for the identification information of a certain external storage device. All the files can be read by connecting the external storage device to the electronic device. Therefore, when reading a specific file on the storage means, it is possible to save the trouble of connecting an external storage device having identification information corresponding to the file to the electronic device, and to easily read and manage the file. it can.

  The file reading method of the present invention includes an interface to which an external storage device holding unique identification information is connected, a storage unit for storing a file stored in the external storage device, and a storage unit that stores the file. Used in an electronic apparatus having a processing unit for processing a file and a control unit for controlling the entire apparatus, and stored in the storage unit in a state where the external storage device is connected to the interface. A file reading method for reading a file, wherein the control unit acquires an identification information acquisition step for acquiring identification information held in the external storage device from the external storage device, and the identification based on the acquired identification information. A storage location information acquisition step for acquiring storage location information of a file stored in association with information is different from the acquired identification information. A reading regulating step for regulating the reading of files stored in association with identification information that is characterized in that to execute a file reading step of reading a file based on the acquired storage destination information.

According to the present invention, the same effects as those of the above-described electronic device can be achieved.
That is, when reading a file stored in the storage means in a state where the external storage device is connected to the interface of the electronic device, first, identification information of the connected external storage device is acquired in the identification information acquisition step. The Then, storage destination information of the file stored in association with the acquired identification information is acquired in the storage destination information acquisition step, and a file based on the storage destination information is read out in the file reading step. At this time, reading of the file stored in association with the identification information different from the identification information of the connected external storage device is restricted in the reading restriction step. According to this, among the files on the storage unit, the file stored in association with the identification information of the connected external storage device is permitted, and the file stored in association with the identification information different from the identification information is stored. Can be regulated. Therefore, it is possible to easily limit the reading of the file on the storage means.

  The file reading program of the present invention is stored in an interface to which an external storage device holding unique identification information is connected, a storage unit for storing a file stored in the external storage device, and a storage unit. Used in an electronic apparatus having a processing unit for processing a file and a control unit for controlling the entire apparatus, and stored in the storage unit in a state where the external storage device is connected to the interface. An identification information acquisition step for reading a file, which is a file reading program executable on the control means, and acquiring the identification information held in the external storage device from the external storage device to the control means; A storage location for acquiring storage location information of a file stored in association with the identification information based on the acquired identification information An information acquisition step, a read restriction step for restricting reading of a file stored in association with identification information different from the acquired identification information, and a file reading step for reading a file based on the acquired storage destination information It is characterized by making it.

According to the present invention, it is possible to achieve the same effect as the file reading method described above.
That is, by executing the file reading program, reading of a file stored in association with the identification information of the connected external storage device is permitted, and the file stored in association with identification information different from the identification information is stored. Reading can be restricted. Therefore, it is possible to easily limit the reading of the file on the storage means, and the file can be easily managed.

The recording medium of the present invention is characterized in that the above-mentioned file reading program is recorded so as to be readable by a computer.
According to the present invention, by reading and executing the file reading program recorded on the recording medium, it is possible to achieve the same effect as the file reading program described above.
Moreover, optical discs such as CD (Compact Disc) and DVD (Digital Versatile Disc), magneto-optical discs, hard disk devices, semiconductor memories, etc. can be used as recording media. The program can be installed on an electronic device such as a PC, executed on the electronic device, and a file reading program can be distributed.

(1) Overall Configuration Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram illustrating a configuration of an image display apparatus 1 according to the present embodiment.
The image display device 1 corresponds to the electronic apparatus of the present invention, and is stored in the HDD 44 or the memory card 6 from an HDD (Hard Disk Drive) 44 as a storage means provided therein or a memory card 6 as an external storage device. Read and execute the processed file. As shown in FIG. 1, the image display device 1 includes a display device body 2 and a remote controller (hereinafter sometimes abbreviated as “remote controller”) 5 for remotely operating the display device body 2. ing.

The display device body 2 includes a control board 3 that controls the device body, an operation panel 41, a remote control interface (hereinafter, may be abbreviated as “remote control IF”) 42, a card slot 43, an HDD 44, and an image display unit. 45 and a speaker 46.
Among these, the operation panel 41 has a configuration in which a plurality of keys are arranged, and is provided exposed to the outer surface of the display device body 2. As such keys, in addition to a power key for turning on / off the power, a volume adjustment key for adjusting the volume, etc., selection on a screen such as a menu formed on the image display unit 45 to be described later Up / down / left / right cursor keys for selecting an item, a confirm key for confirming the selected item, a cancel key for canceling the confirmed state, and the like are provided. The operation panel 41 is electrically connected to a system controller 31 of the control board 3 to be described later, and outputs an operation signal corresponding to a key input operation on the operation panel 41 to the system controller 31.

  Although not shown in detail, the remote control IF 42 includes a light receiving unit that receives an infrared signal from the remote control 5 and a module that digitally converts the infrared signal into an operation signal that can be internally processed by the display device body 2. . The operation signal generated in this way is output to the system controller 31 of the control board 3 to be described later, similarly to the operation panel 41 described above. The remote controller 5 is provided with a plurality of keys for executing the same function as the keys arranged on the operation panel 41.

  The card slot 43 corresponds to the interface of the present invention, is configured so that the memory card 6 can be inserted and removed, and has a card reader / writer function of the memory card 6. That is, the card slot 43 reads a file stored in the memory card 6 mounted in the card slot 43 and stores a file in the memory card 6 under the control of the system controller 31 described later. Is. Further, the card slot 43 reads out a serial number as identification information of the installed memory card 6. Therefore, the card slot 43 is exposed outside the display device body 2.

  The HDD 44 is configured to be capable of storing a plurality of files, and executes reading of the file stored in the storage area of the HDD 44 and storage of the file in the storage area under the control of the system controller 31. . In addition to the file, the HDD 44 stores a management table corresponding to the path that is the storage destination information of the file stored from the memory card 6 and the identification information of the memory card 6 that is the storage source. Yes. In the present embodiment, the HDD 44 is built in the display device body 2, but may be externally attached.

Here, the management table will be described.
The management table is stored in the HDD 44 as described above. In this management table, a serial number as identification information of the memory card 6 and a path as storage destination information of a file on the HDD 44 originating from the memory card 6 having the serial number are registered in association with each other. ing. In this management table, the file path and identification information are not necessarily written when the file is saved from the memory card 6 to the HDD 44, but when the file saving process SA restricts reading of the file to be saved. The written information is referred to in the file reading process SB. The information of the management table can be edited in the management table editing process SC.
By providing such a management table, it is possible to easily and quickly register and search for a readable file.

The image display unit 45 forms and displays an image corresponding to the image information input from the control board 3 and is configured to include a liquid crystal panel and a drive circuit that drives the liquid crystal panel, although detailed illustration is omitted. ing. That is, in the image display unit 45, the drive circuit drives the liquid crystal panel based on the image information input from the control board 3, so that an image based on the image information is formed and displayed on the liquid crystal panel.
The speaker 46 outputs sound corresponding to sound information input from the control board 3.

(2) Configuration of Control Board 3 The control board 3 corresponds to the control means of the present invention, and is configured as a circuit board that controls the driving of the entire display device body 2 as described above. As shown in FIG. 1, the control board 3 includes a system controller 31, an arithmetic processing circuit 32, an image processing circuit 33, an audio processing circuit 34, a ROM (Read Only Memory) 35, and a RAM (Random Access Memory) 36. It is configured.
Among these, the ROM 35 is composed of an electrically rewritable flash memory, and stores programs and various data processed by the arithmetic processing circuit 32 described later. For example, the ROM 35 stores a password referred to in a management table editing process SC described later. The ROM 35 stores template image data of various screens such as a selection screen generated by an image processing circuit 33 described later.
The RAM 36 temporarily stores part or all of the program and data when the program and data in the ROM 35 are processed by the arithmetic processing circuit 32.

The system controller 31 assists the processing of the arithmetic processing circuit 32 described later, and performs input / output control of information and signals to the control board 3.
Specifically, the system controller 31 outputs operation signals from the operation panel 41 and the remote control IF 42 to the arithmetic processing circuit 32. Further, when the control signal is input from the arithmetic processing circuit 32, the system controller 31 reads out the files stored in the memory card 6 and the HDD 44 mounted in the card slot 43 according to the type of the control signal, and the arithmetic processing circuit. A file is output to 32, and a file is moved and copied between the memory card 6 and the HDD 44.

The image processing circuit 33 assembles the image information input from the arithmetic processing circuit 32 and outputs the image information to the image display unit 45 at a predetermined timing. In addition, the image processing circuit 33 adjusts color tone, resolution, and the like for input image information.
The audio processing circuit 34 processes the audio information input from the arithmetic processing circuit 32 and outputs it to the speaker 46. Specifically, the audio processing circuit 34 performs processing such as signal amplification to increase / decrease the output volume, or to execute acoustic effect processing.

(3) Configuration of Arithmetic Processing Circuit 32 FIG. 2 is a block diagram showing functional classification of the arithmetic processing circuit 32.
The arithmetic processing circuit 32 corresponds to the arithmetic processing device of the present invention, and is a circuit that includes a CPU (Central Processing Unit) and the like. The arithmetic processing circuit 32 outputs a control signal to each functional unit of the control board 3 to autonomously control the driving of the entire control board 3. Further, the arithmetic processing circuit 32 controls the display device body 2 by controlling each functional unit of the control board 3 in accordance with operation signals input from the operation panel 41 and the remote control IF 42 via the system controller 31.
As shown in FIG. 2, the arithmetic processing circuit 32 includes a signal detection unit 321, a main control unit 322, an information acquisition unit 323, and a process execution unit 324.

The signal detection unit 321 detects an operation signal input via the system controller 31, and when the input of the operation signal is detected, the main control unit 322 outputs the type of the operation signal detected as input. To do.
The main control unit 322 performs autonomous drive control of the display device body 2 and performs main operation control of the display device body 2 in a file storage process SA, a file read process SB, and a management table editing process SC, which will be described later. In these processes SA, SB, and SC, the main control unit 322 outputs a control signal to the information acquisition unit 323 and the process execution unit 324 according to the type of the operation signal detected by the signal detection unit 321, and The process according to the control signal is executed.

The information acquisition unit 323 acquires various types of information according to a control signal from the main control unit 322. Specifically, the information acquisition unit 323 stores a file storage process SA for saving a file from the memory card 6 to the HDD 44, a file read process SB for reading a file stored in the HDD 44, and the memory card 6 attached. It operates in the management table editing process SC for changing the read restriction of the key file. The file saving process SA, the file reading process SB, and the management table editing process SC will be described in detail later.
Such an information acquisition unit 323 includes a storage file information acquisition unit 3231, a selection file information acquisition unit 3232, a storage destination path acquisition unit 3234, a restriction selection information acquisition unit 3235, an identification information acquisition unit 3236, a management table information acquisition unit 3237, An editing type information acquisition unit 3238 and an editing target information acquisition unit 3239 are provided. Each information acquired by each of these acquisition units 3231 to 239 is temporarily stored in the RAM 36.

The saved file information acquisition unit 3231 outputs a control signal to the system controller 31 and acquires information on files stored in the memory card 6 and the HDD 44 via the system controller 31. Specifically, the saved file information acquisition unit 3231 acquires the paths and the like of all the files stored in the memory card 6 and the HDD 44. Such saved file information is used when the saved file selection screen is generated in the file saving process SA.
The selected file information acquisition unit 3232 acquires information on a file selected as a storage target in the HDD 44 on the storage file selection screen displayed in the file storage processing SA, specifically, the path of the file. Such selected file information is referred to when the selected file is stored in the HDD 44.

The save destination path acquisition unit 3233 acquires the path of the folder on the HDD 44 selected as the save destination folder on the save destination folder selection screen displayed in the file saving process SA.
The storage format acquisition unit 3234 acquires the storage format selected on the storage format selection screen displayed in the file storage process SA. Specifically, it is acquired whether the selected saving format is a copy or move of the selected file to the save destination folder of the HDD 44.
These storage destination paths and storage formats are referred to when the above-described selected file is stored in the HDD 44.

The restriction selection information acquisition unit 3235 acquires information on the item selected on the restriction selection screen of the file storage process SA. Specifically, the restriction selection information acquisition unit 3235 obtains information as to whether or not to restrict reading of the selected file when another memory card 6 is attached when the selected file is saved.
The identification information acquisition unit 3236 acquires the identification information of the memory card 6 in the file storage process SA, the file read process SB, and the management table editing process SC. Specifically, the serial number of the memory card 6 is acquired as identification information.
The management table information acquisition unit 3237 is a management table in which the identification information of the memory card 6 and the file path on the HDD 44 originating from the memory card 6 are associated and registered in the file reading process SB and the management table editing process SC. Get information about.

  The editing type information acquisition unit 3238 acquires the editing type selected on the editing screen of the management table editing process SC for editing the correspondence between the identification information registered on the management table and the file path. Specifically, the edit type information acquisition unit 3238 determines whether the edit type selected on the edit screen is addition of master identification information that can be read for all files stored in the HDD 44, or the new memory card 6. Whether the file read restriction is added with the identification information as a key, the identification information of the already registered memory card 6 is changed, or the identification information of the already registered memory card 6 is deleted To get.

  The edit target information acquisition unit 3239 acquires the edit target selected on the edit target selection screen displayed in the management table editing process SC when the memory card 6 with the identification information set as the master identification information is loaded. . Here, since the master identification information has not only read authority for all files stored in the HDD 44 but also edit authority for the management table, the memory card in which the identification information is set as the master identification information. When 6 is attached, it is necessary to select which identification information in the management table is to be edited on the edit target selection screen. Therefore, the edit target information acquisition unit 3239 acquires the item selected on the edit target selection screen, that is, information on the management table to be edited.

  As described above, the process execution unit 324 performs substantial processes in the file storage process SA, the file read process SB, and the management table edit process SC. Therefore, the process execution unit 324 includes a storage file storage unit 3241, a screen information formation unit 3242, a list creation unit 3243, a file execution unit 3244, a management table registration unit 3245, a management table editing unit 3246, and an editing target setting unit 3247. ing.

The storage file storage unit 3241 refers to the information of the selected file selected on the storage file selection screen of the file storage processing SA and the path of the storage destination folder selected on the storage destination selection screen via the system controller 31. The selected file is saved in the save destination folder in the save format selected on the save format selection screen.
Specifically, when the control signal is input from the main control unit 322, the storage file storage unit 3241 refers to the RAM 36, acquires the path of the selected file, the path of the storage destination folder, and the storage format, and the system controller 31. The selected file stored in the attached memory card 6 is saved in the folder designated by the path of the save destination folder. At this time, if the saving format is “copy”, the selected file on the memory card 6 is not deleted, and if the saving format is “move”, the selected file on the memory card 6 is deleted.

The screen information generation unit 3242 generates image information of each selection screen displayed on the image display unit 45 in the file storage process SA, the file read process SB, and the management table editing process SC, and outputs it to the image processing circuit 33.
That is, the screen information generation unit 3242 refers to the template image data stored in the ROM 35, and selects various screens in the file storage process SA, the file read process SB, and the management table editing process SC, which will be described later, based on the template image data. And the image information of the selection screen is output to the image display unit 45.
Specifically, the screen information generation unit 3242 generates image information of a storage file selection screen, a storage destination selection screen, a storage format selection screen, and a restriction selection screen in the file storage processing SA, and the file reading processing SB. The image information of the read file selection screen is generated, and the image information of the edit type selection screen, the password input screen, and the edit target selection screen is generated in the management table editing process SC. That is, the screen information generation unit 3242 constitutes a restriction selection unit of the present invention.

  Based on the identification information acquired from the memory card 6 connected by the identification information acquisition unit 3236, the list creation unit 3243 generates a list of files that can be read with the identification information. In other words, the list creation unit 3243 generates a list of readable files excluding files stored in association with identification information different from the identification information of the attached memory card 6. For this reason, the list creation unit 3243 corresponds to the file read restriction unit of the present invention.

  Specifically, the list creation unit 3243 refers to the management table based on the acquired identification information, and acquires file information registered in association with the identification information. In other words, the list creation unit 3243 does not set the file in the readable list, assuming that there is no read authority for a file not registered in association with the acquired identification information among the files registered in the management table. . When the acquired identification information is not registered in the management table, the list creation unit 3243 does not set all files registered in the management table in the readable list.

Here, regarding a file that is not registered in the management table, that is, a file that is not subject to read restriction, no matter what memory card 6 is attached or when no memory card 6 is attached. Assuming that the file is readable, the information of the file is set in the readable list.
On the other hand, when the identification information set as the master identification information in the management table is acquired, it is assumed that the identification information has the authority to read all the files stored in the HDD 44, and all the files in the HDD 44 are stored. Set to readable list. This readable list is temporarily stored in the RAM 36, and is referred to when a read file selection screen is generated by the screen information generation unit 3242 described above.

  The file execution unit 3244 reads the file selected on the read file selection screen and executes the file. If the selected file is an image file, it is decoded as image information, and the decoded image information is output to the image processing circuit 33. If the selected file is a music file, it is decoded as music information, and the decoded audio information is output to the audio processing circuit 34. As a result, a file selected from the readable list can be executed, and an image or sound based on the file can be displayed / output. Depending on the type of file, software that can execute the file may be installed in the ROM 35 or the HDD 44 in advance, and the software can be executed by starting the software.

  The management table registration unit 3245 corresponds to the association information registration unit of the present invention, and associates the identification information of the memory card 6 with the information on the file derived from the memory card 6 and stored in the HDD 44 and registers it in the management table. . Specifically, when the management table registration unit 3245 newly saves a file from the memory card 6 to the HDD 44 in the file saving process SA, an item to be subject to read restriction is selected on the restriction selection screen of the file saving process SA. In this case, the storage destination path and file name of the selected file selected as the file to be stored in the HDD 44 and the identification information of the memory card 6 are associated and registered in the management table. That is, the management table registration unit 3245 and the storage file storage unit 3241 constitute the file storage unit of the present invention.

  The management table registration unit 3245 corresponds to the master registration unit of the present invention, and registers master identification information. Specifically, the management table registration unit 3245 uses the management table editing process SC to be described later to store the identification information of the installed memory card 6 in the HDD 44 when “setting master identification information” is selected as the editing type. Are registered in the management table as master identification information having the authority to read almost all files stored in.

  The management table editing unit 3246 edits the contents of the management table stored in the storage area of the HDD 44 in the management table editing process SC. That is, the management table editing unit 3246 adds, changes, and deletes the already registered identification information with respect to the management table.

Specifically, the management table editing unit 3246 reads the file stored in association with the already registered identification information when “addition of identification information” is selected, that is, the memory card 6 having other identification information. In the case of permitting even when the card is mounted, the identification information of the newly registered memory card 6 is added to the column of the identification information already registered.
When “change identification information” is selected, that is, when a memory card 6 having already registered identification information is changed, the management table editing unit 3246 stores the identification information in the newly installed memory. Overwrite with the identification information of the card 6.
When “delete identification information” is selected, that is, when the already registered identification information is deleted and the read restriction of the file stored in association with the identification information is released, the management table editing unit 3246 The registration is invalidated by deleting the selected identification information and the path of the file associated with the identification information from the management table.
By using such a management table editing unit 3246, file management on the HDD 44 can be performed more easily.

  In the management table editing process SC, the editing target setting unit 3247 selects the identification selected on the editing target selection screen when the identification information of the memory card 6 that is first installed is set as the master identification information in the management table. Set the information to be edited. That is, when a memory card having identification information registered as master identification information is loaded, all registered contents of the management table can be edited, so the identification information registered in the management table It is necessary to select the editing target from the list. For this reason, the edit target setting unit 3247 temporarily stores the identification information selected on the edit target selection screen in the RAM 36 as an edit target. The stored identification information as the editing target is referred to by the management table editing unit 3246.

(4) File saving process SA
Next, the file saving process SA will be described.
3 and 4 are diagrams for explaining the processing flow of the file storage processing SA.
The file saving process SA allows the user to select whether or not to perform read restriction on the file when saving the file from the attached memory card 6 to the HDD 4. This is a process that prevents the file from being read even if it is attached.

That is, in the file storage process SA, when an operation signal for calling the file storage process SA is output from the system controller 31 to the arithmetic processing circuit 32 by the operation of the operation panel 41 and the remote controller 5, as shown in FIG. The signal detection unit 321 of the processing circuit 32 detects the operation signal and outputs a control signal indicating that the signal is detected to the main control unit 322.
Thereafter, the main control unit 322 determines whether or not the memory card 6 is mounted in the card slot 43 via the system controller 31 (processing SA01).
If it is determined that the memory card 6 is not installed, the main control unit 322 waits until the memory card 6 is installed.

  On the other hand, when it is determined that the memory card 6 is attached, the main control unit 322 outputs a control signal to the storage file information acquisition unit 3231, and the storage file information acquisition unit 3231 stores the data in the memory card 6. The configuration of the folder and file that has been set is acquired (processing SA02). That is, all the file information stored in the attached memory card 6 is acquired by the stored file information acquisition unit 3231.

After the process SA02, the main control unit 322 outputs a control signal to the screen information generation unit 3242 of the process execution unit 324, and the screen information generation unit 3242 uses the screen information generation unit 3242 to store a file to be stored in the HDD 44. Image information of a save file selection screen to be selected is generated and the screen is displayed (processing SA03). At this time, the screen information generation unit 3242 generates image information of the screen with reference to the file information of the memory card 6 acquired by the storage file information acquisition unit 3231 described above.
Information on the file selected on the save file selection screen, specifically, the file name and path are acquired by the selected file information acquisition unit 3232 according to a control signal from the main control unit 322, and information on the selected file is obtained. Is temporarily stored in the RAM 36 (processing SA04).

After the process SA04, the main control unit 322 outputs a control signal for generating a storage destination selection screen for selecting a storage destination of the selected file in the HDD 44 to the screen information generation unit 3242. Then, the screen information generation unit 3242 acquires the image of the save destination selection screen based on the information of the selection file acquired by the selection file information acquisition unit 3232 and stored in the RAM 36 and the template image data stored in the ROM 35. Information is generated and the screen is displayed (processing SA05). Note that, when a folder is newly generated as a storage destination, the main control unit 322 creates the folder on the HDD 44.
Then, the path of the folder on the HDD 44 selected on the screen is acquired by the storage destination path acquisition unit 3233 and temporarily stored in the RAM 36 (processing SA06).

After the process SA06, the main control unit 322 outputs a control signal for generating a save format selection screen for selecting a save format of the selected file for the folder on the HDD 44 specified by the save destination path to the screen information generating unit 3242. Then, the screen information generation unit 3242 generates image information of a storage format selection screen based on the template image data in the ROM 35, and displays the screen (processing SA07). Note that such a storage format is a file move and copy in the present embodiment as described above.
Then, the storage format selected on the storage format selection screen is acquired by the storage format acquisition unit 3234 and temporarily stored in the RAM 36 (processing SA08).

After the process SA08, as shown in FIG. 4, the main control unit 322 determines whether or not to allow reading of the selected file stored in the HDD 44 from the memory card 6 when another memory card 6 is attached. A control signal for generating a restriction selection screen to be selected is output to the screen information generation unit 3242. Then, the screen information generation unit 3242 generates image information of the restriction selection screen based on the template image data in the ROM 35, and displays the screen (processing SA09). Accordingly, since it is possible to select whether or not the read restriction is set for the file to be stored, the range of file management on the HDD 44 can be expanded.
The restriction information selected on this restriction selection screen is acquired by the restriction selection information acquisition unit 3235 and temporarily stored in the RAM 36.

Here, the main control unit 322 determines the restriction information stored in the RAM 36 (processing SA10). That is, it is determined whether or not a read restriction that prevents the selected file from being read when another memory card 6 is loaded is selected.
In the determination process SA10, when file storage not subject to read restrictions is selected, the main control unit 322 proceeds to process SA13 described later.

On the other hand, when file storage to be subjected to read restriction is selected, the main control unit 322 outputs a control signal for causing the identification information acquisition unit 3236 to read the identification information of the attached memory card 6, and the identification information The identification information is acquired by the acquisition unit 3236 (processing SA11).
After this processing SA11, the main control unit 322 outputs a control signal to the management table registration unit 3245, and the management table registration unit 3245 associates the file name of the selected file, the storage destination path, and the acquired identification information. Register in the management table (processing SA12).

Thereafter, in process SA13, the main control unit 322 determines the storage format acquired in process SA08 and stored in the RAM 36 (process SA13).
If it is determined that the storage format is copy, the main control unit 322 outputs a control signal to the storage file storage unit 3241, and the storage file storage unit 3241 uses the selected file on the memory card 6. Is copied to the folder set as the storage destination of the HDD 44 (processing SA14).
On the other hand, if it is determined that the storage format is movement, the main control unit 322 causes the storage file storage unit 3241 to move the selected file to a storage destination folder on the HDD 44 (processing SA15). That is, in this process SA15, after the selected file is copied to the storage destination folder of the HDD 44, the selected file on the memory card 6 is deleted.
In these processes SA14 and SA15, the save destination folder is specified with reference to the save destination path stored in the RAM 36 in process SA06.
Thus, the file saving process SA ends.

  By such a file storage process SA, when a file stored in the memory card 6 is stored in the HDD 44, a read restriction that prevents the file from being read when another memory card 6 is mounted. Can be stored.

(5) File read processing SB
Next, the file reading process SB will be described.
FIG. 5 is a diagram for explaining the processing flow of the file reading processing SB.
The file reading process SB is a process for selecting an arbitrary file from among the files in a readable state among the files stored in the memory card 6 and the HDD 44, and reading and executing the file.

  That is, in the file reading process SB, as shown in FIG. 5, when an operation signal for calling the file reading process SB is output from the system controller 31 to the arithmetic processing circuit 32 by the operation of the operation panel 41 and the remote controller 5, As in the process SA01, the signal detection unit 321 detects the operation signal, and outputs a control signal indicating that the signal is detected to the main control unit 322. Thereafter, the main control unit 322 determines whether or not the memory card 6 is mounted in the card slot 43 via the system controller 31 (processing SB01), and determines that the memory card 6 is not mounted. , The process proceeds to process SB08.

If it is determined that the memory card 6 is mounted, the main control unit 322 acquires the identification information of the memory card 6 by the identification information acquisition unit 3236 (identification information acquisition step SB02), and management table information Information of the management table stored in the HDD 44 is acquired by the acquisition unit 3237 (processing SB03).
After this process SB03, the main control unit 322 determines whether the identification information is registered in the management table from the identification information acquired in process SB02 and the management table information acquired in process SB03 (process SB04). Here, when it is determined that the identification information is not registered in the management table, the main control unit 322 proceeds to process SB08.

On the other hand, when determining that the identification information of the loaded memory card 6 is registered in the management table, the main control unit 322 determines whether the identification information is registered as master identification information. (Processing SB05).
If it is determined in the determination process SB05 that the identification information is master identification information, the main control unit 322 determines that all the files registered in the management table are readable files, in process SB03. The acquired paths of all files are temporarily stored in the RAM 36 as readable file paths (process SB06).
If it is determined in the determination process SB05 that the identification information of the memory card 6 is not the master identification information, the main control unit 322 registers the management table information obtained in the process SB03 in association with the identification information. The path of the file thus made is temporarily stored in the RAM 36 as a path of a file that can be read by the identification information (save destination information acquisition step SB07).

Thereafter, in process SB08, the main control unit 322 is registered in the management table by the saved file information acquisition unit 3231 among the path of the file stored in the memory card 6 and the file stored in the HDD 44. Get all file paths and not. Then, if a readable file has already been set, these file paths are added to the readable file path, or if not set, a new readable file is set. , Temporarily stored in the RAM 36 (process SB08).
After the process SB08, the main control unit 322 outputs a control signal to the list creation unit 3243, and the list creation unit 3243 obtains the path of the readable file stored in the RAM 36 by the process SB08 and A list of files that can be read in the state of the display device body 2 is created (reading restriction step SB09). The readable file list created by this process SB09 is temporarily stored in the RAM 36.

After the process SB09, the main control unit 322 uses the screen information generation unit 3242 to create a file to be read from the readable file based on the created readable file list and the template image data stored in the ROM 35. A read file selection screen to be selected is generated, and the screen is displayed (processing SB10).
After the display of the read file selection screen, the signal detection unit 321 detects an operation signal input according to the operation of the operation panel 41 and the remote controller 5, and the main control is performed based on the control signal input from the signal detection unit 321. Unit 322 determines whether or not a read file has been selected (processing SB11). If it is determined that the read file is not selected, the main control unit 322 waits for any of the readable files displayed on the read file selection screen to be selected.

On the other hand, when it is determined that the read file is selected, the main control unit 322 acquires the path of the selected file and outputs the path of the file and a file execution signal to the file execution unit 3244. . Then, the file execution unit 3244 reads and executes the input path file (file read step SB12).
Thus, the file reading process SB ends.

With such a file reading process SB, it is possible to place a read restriction on the file stored in the HDD 44 according to the state of the display device body 2.
That is, when the memory card 6 is not inserted into the card slot 43 and when the memory card 6 having the identification information not registered in the management table is mounted, the file registered in the management table is stored. Read restrictions. In addition, when a memory card 6 having identification information registered in the management table as identification information that is not master identification information is loaded, read restrictions on files registered in association with identification information different from the identification information are restricted. It can be applied. On the other hand, when the memory card 6 having the identification information registered as the master identification information is inserted, all the files stored in the memory card 6 and the HDD 44 can be read.
According to this, it is possible to set a readable file by the memory card 6 attached. Therefore, since the memory card 6 can be used as a read key for a file stored in the HDD 44, it is possible to easily limit the reading of the file stored in the HDD 44.

(6) Management table editing process SC
Next, the management table editing process SC will be described.
6 and 7 are diagrams for explaining the processing flow of the management table editing process SC.
The management table editing process SC is a process for editing the correspondence between the identification information of the memory card 6 and the file path in the management table. Specifically, in the management table editing process SC, as described above, master identification information is registered, and new identification information is added, changed, and deleted with respect to the association between the identification information already registered and the file. .

That is, in the management table editing process SC, as shown in FIG. 6, when an operation signal for calling the management table editing process SC is output from the system controller 31 to the arithmetic processing circuit 32 by the operation of the operation panel 41 and the remote controller 5. The signal detection unit 321 detects the operation signal and outputs a control signal indicating that the signal is detected to the main control unit 322. Thereafter, the main control unit 322 outputs a control signal to the screen information generation unit 3242, and the screen information generation unit 3242 generates image information of an edit type selection screen for selecting a type for editing the management table. A screen is displayed (process SC01).
The edit type selected on the edit type selection screen is acquired by the edit type information acquisition unit 3238 to which the control signal is input from the main control unit 322, and is temporarily stored in the RAM 36 (processing SC02).

  After this process SC02, the main control unit 322 determines whether or not the memory card 6 is installed in the card slot 43 via the system controller 31 (process SC03). If the memory card 6 is not installed. If it is determined, the memory card 6 is put on standby. If it is determined that the memory card 6 is attached, the main control unit 322 acquires the identification information of the memory card 6 by the identification information acquisition unit 3236 and temporarily stores it in the RAM 36 (processing) SC04).

After this process SC04, the main control unit 322 determines whether or not the edit type acquired in process SC02 is a master setting (process SC05).
Here, if it is determined that the setting is a master setting, the main control unit 322 causes the screen information generation unit 3242 to generate image information of a password input screen that requests input of a password for executing the master setting, The screen is displayed (process SC06). When the user inputs a password by an input operation of a key provided on the remote controller 5 or the operation panel 41 on the password input screen, the main control unit 322 stores the input password and the ROM 35 in advance. It is determined whether or not the entered password matches (process SC07).

  When the main control unit 322 determines that the input password does not match the previously stored password in the determination in the process SC07, the main control unit 322 repeats the process SC07 until the correct password is input. . At this time, the main control unit 322 may cause the screen information generation unit 3242 to display a message indicating that the password is incorrect on the screen. When the master setting is canceled by the user during the execution of the process SC07, the main control unit 322 ends the management table editing process SC.

  On the other hand, when the main control unit 322 determines that the input password and the previously stored password match in the determination in process SC07, the main control unit 322 outputs a control signal to the management table registration unit 3245. The management table registration unit 3245 registers the identification information acquired in process SC04 in the management table as master identification information (process SC08). Thereafter, the main control unit 322 ends the management table editing process SC.

If it is determined in the process SC05 that the selected edit type is not the master setting, the main control unit 322 acquires management table information by the management table information acquisition unit 3237 (process SC09).
After this process SC09, the main control unit 322 determines whether or not the identification information is registered in the management table from the management table information acquired in process SC07 and the identification information acquired in process SC04 (process SC10). .

Here, when it is determined that the identification information of the loaded memory card 6, that is, the identification information acquired in the process SC 04 is not registered in the management table, the main control unit 322 uses the screen information generation unit 3242 to manage the identification information. Image information of a registered card attachment request screen for requesting attachment of the memory card 6 whose identification information is registered in the table to the card slot 43 is generated, and the screen is displayed (processing SC11). Thereafter, the main control unit 322 returns to the process SC03.
On the other hand, when determining that the identification information acquired in process SC04 is registered in the management table, the main control unit 322 determines whether the identification information is registered in the management table as master identification information ( Process SC12).

  If it is determined that the identification information is not master identification information, the main control unit 322 outputs a control signal to the editing target setting unit 3247, and the editing target setting unit 3247 edits the identification information acquired in process SC04. The target is temporarily stored in the RAM 36 (process SC13).

On the other hand, if it is determined that the identification information of the attached memory card 6 is registered as master identification information, the main control unit 322 causes the screen information generation unit 3242 to generate image information of the edit target selection screen, The screen is displayed (process SC14). This edit target selection screen is a screen for displaying the identification information registered in the management table and the path of the file associated with the identification information and selecting the identification information set as the edit target.
The identification information selected on the editing target selection screen is acquired by the editing target information acquisition unit 3239 to which the control signal from the main control unit 322 is input, and is temporarily stored in the RAM 36 as the identification target identification information. (Process SC15).

  After the process SC13 or the process SC15, the main control unit 322 determines again the edit type acquired in the process SC02 as shown in FIG. 7 (process SC16). That is, in this determination process SC16, whether the selected editing type is addition of new identification information to the identification information already registered in the management table, or change of the registered identification information to new identification information. Or whether the registered identification information is to be deleted.

Here, when the selected editing type is addition of identification information, the main control unit 322 outputs a control signal to the screen information generation unit 3242 so that a new memory card 6 is inserted into the card slot 43. Image information of the mounting request screen is generated and the screen is displayed (processing SC17).
Thereafter, the main control unit 322 determines whether or not a new memory card 6 has been installed (processing SC18). If it is determined that no new memory card 6 has been installed, the main card 322 is not installed. Wait until it is detected.

When it is determined that a new memory card 6 is inserted, the main control unit 322 acquires the identification information of the new memory card 6 by the identification information acquisition unit 3236 (processing SC19). Thereafter, the main control unit 322 outputs a control signal to the management table editing unit 3246, and the management table editing unit 3246 displays the identification acquired in the process SC19 in the column on the management table of the identification information acquired in the process SC04. Information is added (process SC20). As a result, even when a file that can be read when the memory card 6 having the identification information acquired in the process SC04 is mounted, even when a new memory card 6 having the identification information acquired in the process SC19 is mounted, It can be made readable.
Note that, after this process SC20 ends, the main control unit 322 ends the management table editing process SC.

  If the selected edit type is a change of identification information in the determination of process SC16, the main control unit 322 uses the screen information generation unit 3242 to create a new memory card in the same manner as the processes SC17 to SC18. 6 is generated and displayed (processing SC21), and it is determined whether or not a new memory card 6 is mounted (processing SC22). In this process SC22, when the main control unit 322 determines that a new memory card 6 is not installed, the main control unit 322 waits until the installation of the card is detected.

On the other hand, when it is determined that a new memory card 6 is inserted, the main control unit 322 acquires the identification information of the new memory card 6 by the identification information acquisition unit 3236 (processing SC23). The main control unit 322 outputs a control signal to the management table editing unit 3246, and the management table editing unit 3246 overwrites the identification information acquired in the process SC04 in the management table with the identification information acquired in the process SC23. (Process SC24). As a result, a file that can be read when the memory card 6 having the identification information acquired in the process SC04 is attached cannot be read when the memory card 6 is attached, while the readable file contains the master identification information. It can be made readable when a new memory card 6 having the identification information acquired in the process SC23 is mounted other than when the memory card 6 is mounted.
Note that, after the completion of the process SC24, the main control unit 322 ends the management table editing process SC.

Furthermore, when the selected editing type is deletion of identification information in the determination of process SC16, the main control unit 322 outputs a control signal to the management table editing unit 3246, and the management table editing unit 3246 The identification information acquired in process SC04 is deleted from the management table (process SC25).
In accordance with this process SC25, the management table editing unit 3246 deletes the path of the file registered in the management table in association with the deleted identification information (process SC26). This makes it possible to read the file registered in the management table in association with the deleted identification information without mounting the memory card 6 having the deleted identification information.
Note that, after the completion of the process SC26, the main control unit 322 ends the management table editing process SC.

According to the image display device 1 of the present embodiment as described above, the following effects can be obtained.
That is, when a specific memory card 6 is inserted and the file stored in the HDD 44 is allowed to be read from the memory card 6, the file is stored when the file is stored in the HDD 44. The identification information of the memory card 6 and the storage destination path of the file in the HDD 44 are associated with each other and registered in the management table. When reading a file stored in the HDD 44, the identification information of the loaded memory card 6 is acquired and associated with other identification information unless the identification information is registered as master identification information. Reading is not allowed for files registered in the management table. On the other hand, among the files registered in the management table, reading is permitted for files registered in association with the identification information of the mounted memory card 6.

  According to this, it is possible to restrict reading of a file originating from a predetermined memory card 6 and stored in the HDD 44 when another memory card 6 that is not master identification information is mounted. Therefore, since the readable file among the files stored in the HDD 44 is specified by the mounted state of the memory card 6 and the memory card 6 mounted, the read restriction on the file stored in the HDD 44 can be easily performed. Can be applied.

(7) Modification of Embodiment The best configuration for carrying out the present invention is disclosed in the above description, but the present invention is not limited to this. That is, the description limited to the shape, material, and the like disclosed above is an example for easy understanding of the present invention, and does not limit the present invention.
That is, in the above embodiment, the memory card 6 is used as the external storage device, but the present invention is not limited to this, and other external storage may be used. Examples of such external storage include a USB memory and HDD connected to a USB terminal or the like and having a storage area in which data such as files can be stored. In addition, the HDD 44 has been described as the storage unit. However, the storage unit is not limited thereto, and may be replaced with another storage device as long as the file can be stored.

  In the embodiment, the file storage process SA, the file read process SB, and the management table edit process SC are performed by reading a program for executing these from the ROM 35. However, the program is stored in the HDD 44. Also good. Further, the program may be executed by reading the program from a recording medium such as a CD and a DVD via a data reading device connected to the image display device 1 as an electronic device, not limited to the HDD 44.

In the embodiment, when a file stored in the memory card 6 is stored in the HDD 44 and the read restriction is applied to the file, the path of the file and the identification information of the memory card 6 are registered in the management table. However, the present invention is not limited to this. For example, when saving to the HDD 44, additional information based on the identification information of the memory card 6 from which the file is derived may be added to the file to be saved.
In the case of using the management table, since the file itself is not edited, it is possible to suppress the possibility of the file being damaged, register the file to which the read restriction is applied, and the file to which the read restriction is added. Can be easily and quickly performed.

In the said embodiment, although the image display apparatus 1 provided with the image display part which has a liquid crystal panel was mentioned, this invention is not restricted to this. That is, you may employ | adopt this invention to the image display apparatus provided with the image display part of another structure. Examples of such an image display device include a plasma display, a CRT (Cathode-Ray Tube) display, and a projector.
The projector is applicable not only to a front type projector that projects from the direction of observing the screen, but also to a rear type projector that projects from the side opposite to the direction of observing the screen.
Further, such a projector may be configured to include a light modulation device that modulates a light beam from a light source according to image information to form an optical image. Examples of such a light modulation device include a liquid crystal panel, a device using an ILA (Image Light Amplifier) element, a DMD (Digital Micromirror Device), a GLV (Grating Light Valve), and the like. In addition, a laser oscillator that emits laser light according to image information without providing a light modulation device, and an image is formed by scanning in the vertical and horizontal directions of the screen with the laser light emitted from the laser oscillator 2. The present invention may be adopted in a laser projector provided with two carbano mirrors.

  In the above-described embodiment, the image display device having the above-described configuration has been described as the electronic device. However, the present invention is not limited to this. In other words, other devices may be used as long as they are connected to an external storage device having identification information and are provided with storage means capable of storing files stored in the external storage device. For example, the present invention can be applied to a PC, a digital camera, a portable music player, a PDA (Personal Digital Assistance) equipped with an interface such as a USB terminal.

  The present invention can be used for an electronic device including an interface to which an external storage device such as a memory card or an external storage is connected, and including a storage unit configured to be able to save a file stored in the external storage device. It can also be suitably used for electronic devices such as image display devices, PCs, and digital cameras.

1 is a configuration diagram showing an image display device according to an embodiment of the present invention. The block diagram which shows the function classification | category of the arithmetic processing circuit in the said embodiment. The figure which shows the processing flow of the file preservation | save process in the said embodiment. The figure which shows the processing flow of the file preservation | save process in the said embodiment. The figure which shows the processing flow of the file reading process in the said embodiment. The figure which shows the processing flow of the management table edit process in the said embodiment. The figure which shows the processing flow of the management table edit process in the said embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Image display apparatus (electronic device), 3 ... Control board (control means), 6 ... Memory card (external storage device), 32 ... Arithmetic processing circuit (arithmetic processing means), 43 ... Card slot (interface), 44 ... HDD (storage means), 3236 ... identification information acquisition unit, 3241 ... storage file storage unit (file storage unit), 3242 ... screen information generation unit (restriction selection unit), 3243 ... list creation unit (file read restriction unit), 3245 ... management table registration unit (association information registration unit, file storage unit, master registration unit), 3246 ... management table editing unit, SB ... file read processing, SB02 ... identification information acquisition step, SB07 ... storage location information acquisition step, SB09 ... Read restriction step, SB12... File read step.

Claims (8)

An interface to which an external storage device holding unique identification information is connected, storage means for saving a file stored in the external storage device, and an arithmetic processing device for processing the file stored in the storage means are provided. And an electronic device comprising a control means for controlling the entire apparatus,
The control means includes
An identification information acquisition unit for acquiring identification information of the external storage device;
A file storage unit that stores the file and the identification information of the external storage device in association with each other when the file stored in the external storage device is stored in the storage unit;
A file read restriction unit for restricting reading of a file stored in association with identification information different from the identification information of the external storage device connected to the interface when reading the file saved in the storage means; An electronic device comprising the electronic device. The electronic device according to claim 1,
The control means includes
An electronic apparatus comprising: a restriction selection unit that selects whether or not to set a file reading restriction by the file reading restriction part when saving a file by the file saving part. In the electronic device according to claim 1 or 2,
The storage means stores a management table corresponding to storage destination information of a file stored from the external storage device and identification information of the external storage device,
The file storage unit
A storage file storage unit for storing the file stored in the external storage device in the storage unit;
An electronic apparatus comprising: a storage destination information of the file; and an association information registration unit that registers the identification information in association with the management table. The electronic device according to claim 3,
The control means includes
An electronic apparatus comprising: a management table editing unit that edits a correspondence relationship between the storage destination information and the identification information on the management table. In the electronic device in any one of Claims 1-4,
An electronic apparatus comprising: a master registration unit for registering master identification information capable of reading almost all files stored in the storage unit regardless of the association between the identification information and the file. An interface to which an external storage device holding unique identification information is connected, storage means for saving a file stored in the external storage device, and an arithmetic processing device for processing the file stored in the storage means are provided. And a file reading method for reading out a file stored in the storage means in a state where the external storage device is connected to the interface, and is used in an electronic device including a control means for controlling the entire apparatus,
In the control means,
An identification information acquisition step of acquiring identification information held in the external storage device from the external storage device;
A storage location information acquisition step for acquiring storage location information of a file stored in association with the identification information based on the acquired identification information;
A read restriction step for restricting reading of a file stored in association with identification information different from the acquired identification information;
And a file reading step of reading a file based on the acquired storage destination information. An interface to which an external storage device holding unique identification information is connected, storage means for saving a file stored in the external storage device, and an arithmetic processing device for processing the file stored in the storage means are provided. And on the control means for reading out a file stored in the storage means in a state where the external storage device is connected to the interface. A file reading program executable by
In the control means,
An identification information acquisition step of acquiring identification information held in the external storage device from the external storage device;
A storage location information acquisition step for acquiring storage location information of a file stored in association with the identification information based on the acquired identification information;
A read restriction step for restricting reading of a file stored in association with identification information different from the acquired identification information;
And a file reading step for reading a file based on the acquired storage location information.   A recording medium in which the file reading program according to claim 7 is recorded so as to be readable by a computer.

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