JP2010272017A - Display device, data conversion method, and data conversion program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device that properly converts an electronic file into a specific data format according to the free space of a storage device, and to provide a data conversion method and a data conversion program. <P>SOLUTION: In a portable terminal, when an electronic file in another data format stored in a memory card is acquired (S51), the size for the electronic file whose format is converted into the specific data format is estimated (S53). If the estimated file size is less than the free space of the memory card 30 (S55: YES), the electronic file is converted into the specific data format, the converted file is stored in the memory card (S57), and the original electronic file is deleted from the memory card. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a display device that displays an electronic file in a specific data format, and a data conversion method and a data conversion program used for the display device.

  Conventionally, a display device that displays an electronic file having a specific data format is known. There is a user's desire to display such an electronic file in another data format different from a specific data format. Therefore, a device such as a personal computer converts an electronic file into a specific data format and causes the display device to process the converted electronic file (see, for example, Patent Documents 1 and 2).

JP 2006-65204 A JP 2009-31878 A

  However, according to such a conventional method, in order to display an electronic file in another data format on the display device, a device capable of converting the electronic file into a specific data format must be used. It was troublesome. Also, when an electronic file is converted to a specific data format, if there is no free space in the storage device such as a memory card or built-in memory to write the converted electronic file, the electronic file is deleted and conversion processing is performed. Could be wasted.

  The present invention has been made to solve the above problems, and a display device, a data conversion method, and a data conversion program capable of appropriately converting an electronic file into a specific data format in accordance with the free space of the storage device The purpose is to provide.

  In order to solve the above-described problem, a display device according to a first aspect of the present invention is a display device that displays an electronic file having a specific data format, wherein unsupported data having a data format different from the specific data format is displayed. An unsupported data acquisition means for acquiring the unsupported data from the first storage device to store, and the unsupported data acquired by the unsupported data acquisition means is converted into an electronic file of the specific data format A post-conversion size calculation unit that calculates a post-conversion size that is a data size, and a first unit that determines whether the post-conversion size calculated by the post-conversion size calculation unit is equal to or less than a free capacity of the second storage device. If it is determined by the one capacity determination means and the first capacity determination means that the converted size is less than or equal to the free capacity of the second storage device, the unsupported data Conversion means for converting the unsupported data acquired by the acquisition means into an electronic file of the specific data format, and storing the electronic file of the specific data format converted by the conversion means in the second storage device Conversion data storage control means.

  According to a second aspect of the present invention, in addition to the configuration of the first aspect of the invention, the first storage device and the second storage device are a common storage device, and the unsupported data The obtaining unit obtains a predetermined number of the unsupported data stored in the common storage device, and the converted size calculating unit obtains the predetermined number of unsupported data by the unsupported data obtaining unit. In addition, the converted size when the predetermined number of unsupported data is converted into the electronic file of the specific data format is calculated, and the display device acquires the predetermined number acquired by the unsupported data acquisition unit. When it is determined that the conversion by the conversion means is completed, and the completion determination means determines whether the conversion by the conversion means has been completed. A first deletion unit that deletes the predetermined number of unsupported data for which conversion has been completed from the common storage device, and the uncorresponding data acquisition unit is configured to delete the predetermined number of unsupported data by the first deletion unit. When the corresponding data is deleted, the next unsupported data is acquired from the common storage device.

  According to a third aspect of the present invention, in addition to the configuration of the second aspect of the invention, the common storage device is an external storage device detachably attached to a plurality of devices, and the display device further includes the display device. A mounting means for detaching the external storage device is provided.

  According to a fourth aspect of the present invention, in addition to the configuration of the second or third aspect of the invention, the uncorresponding data acquisition means includes the uncorresponding data stored in the first storage device. The unsupported data having the largest data size is preferentially acquired.

  According to a fifth aspect of the present invention, in addition to the configuration of the fourth aspect of the invention, the unsupported data acquisition unit is configured such that the size after conversion is the second storage device by the first capacity determination unit. When it is determined that the capacity is larger than the free capacity, the unsupported data having a data size that is next to the currently unsupported data is preferentially acquired.

  According to a sixth aspect of the present invention, in addition to the structure of the first aspect of the present invention, the unsupported data includes a plurality of partial data composed of predetermined units, and the conversion The means converts the plurality of partial data included in the unsupported data one by one into the specific data format and stores the converted partial data created by the conversion in the second storage device An electronic file of the specific data format is created, and each time the converted partial data is created by the conversion means, a free capacity capable of storing the converted partial data in the second storage device A second capacity judging means for judging whether or not there is a free capacity capable of storing the converted partial data by the second capacity judging means; And a second deleting means for deleting the converted partial data stored.

  According to a seventh aspect of the present invention, in addition to the configuration of the first aspect of the present invention, the unsupported data includes file data indicating a plurality of data configured in units of pages. And the converted size calculating means converts the unsupported data into the electronic file of the specific data format based on the number of pages corresponding to the quantity of the file data included in the unsupported data. The size after conversion is calculated.

  In addition to the configuration of the invention according to any one of claims 2 to 5, the display device according to an eighth aspect of the present invention is configured so that, when the completion determination unit determines that the conversion by the conversion unit is completed, A converted file display control means is provided for selectively displaying the electronic file stored in the second storage device.

  According to a ninth aspect of the present invention, in the display device for displaying an electronic file having a specific data format, unsupported data having a data format different from the specific data format is converted into the electronic file having the specific data format. A non-corresponding data acquisition step of acquiring the uncorresponding data from the first storage device storing the uncorresponding data, and the uncorresponding data acquired by the uncorresponding data acquisition step A post-conversion size calculation step for calculating a post-conversion size that is a data size when the data is converted into the electronic file of the specific data format, and the post-conversion size calculated by the post-conversion size calculation step is a second A first capacity determining step for determining whether or not the free capacity of the storage device is less than or equal to the first capacity determining step; Thus, when it is determined that the converted size is equal to or less than the free capacity of the second storage device, the unsupported data acquired by the unsupported data acquisition step is converted into an electronic file of the specific data format. A conversion step; and a conversion data storage control step of storing the electronic file of the specific data format converted by the conversion step in the second storage device.

  A data conversion program according to a tenth aspect of the present invention is used in a display device that displays an electronic file of a specific data format, and converts unsupported data having a data format different from the specific data format to the specific data format. A data conversion program for converting into an electronic file, which is obtained by an unsupported data acquisition step for acquiring the unsupported data from the first storage device storing the unsupported data in the computer, and the unsupported data acquisition step A post-conversion size calculation step that calculates a post-conversion size, which is a data size when the converted unsupported data is converted into an electronic file of the specific data format, and the post-conversion size calculated by the post-conversion size calculation step A first capacity determination step for determining whether the size is less than or equal to the free capacity of the second storage device. And when the first capacity determining step determines that the converted size is less than or equal to the free capacity of the second storage device, the unsupported data acquired by the unsupported data acquiring step is used as the specific data. A conversion step of converting into an electronic file of a format; and a conversion data storage control step of storing the electronic file of the specific data format converted by the conversion step in the second storage device. .

  In the display device according to the first aspect, a post-conversion size that is a data size when the unsupported data acquired from the first storage device is converted into an electronic file of a specific data format is calculated. If the converted size is less than or equal to the free capacity of the second storage device, the unsupported data is converted into an electronic file of a specific data format, and the electronic file is stored in the second storage device. According to this, although the unsupported data is converted into an electronic file of a specific data format, it is possible to suppress the occurrence of a problem that the electronic file cannot be stored in the second storage device.

  In the display device of the invention according to claim 2, the first storage device and the second storage device are one common storage device, and unacquired unsupported data among unsupported data stored in the common storage device Each time a predetermined number is acquired, the converted size of the unsupported data is calculated. The acquired unsupported data is converted into a specific data format. When the conversion is completed, the unsupported data that has been converted is deleted from the common storage device, and the next unsupported data is acquired from the common storage device. According to this, in addition to the effect of the invention according to claim 1, every time a predetermined number of unsupported data stored in the common storage device is obtained, an electronic file obtained by converting the unsupported data is stored in the second file. Since it is determined whether or not data can be stored in the storage device, it is possible to convert a larger number of unsupported data by making maximum use of the free capacity of the second storage device. Further, since the converted unsupported data is deleted from the common storage device and the next unsupported data is converted, it is possible to secure a free space in which the electronic file of a specific data format is stored in the common storage device. .

  In the display device according to the third aspect, the common storage device is an external storage device that is detachably attached to a plurality of devices, and the display device is detachable from the external storage device. According to this, in addition to the effect of the invention according to claim 2, since the unsupported data before conversion and the electronic file after conversion are stored in the external storage device, the storage for storing these in the display device itself There is no need to provide a device, and the configuration of the display device can be simplified to achieve a reduction in thickness and weight.

  In the display device according to the fourth aspect of the present invention, the data is obtained from the largest data size among the unsupported data stored in the first storage device. According to this, in addition to the effect of the invention according to claim 2 or 3, unsupported data that is most likely to have the largest size after conversion is preferentially converted. It is possible to suppress the occurrence of problems that cannot be stored in the second storage device.

  In the display device according to the fifth aspect, when it is determined that the converted size is larger than the free capacity of the second storage device, unsupported data having the next largest data size is acquired after the currently unsupported data Is done. According to this, in addition to the effect of the invention according to claim 4, even if the converted size of the currently acquired unsupported data is larger than the free capacity of the second storage device, the unsupported acquired next The possibility that the post-conversion size of data becomes smaller than the free capacity of the second storage device can be increased.

  In the display device according to the sixth aspect, the unsupported data includes a plurality of partial data configured in a predetermined unit. A plurality of partial data included in the unsupported data are converted one by one into a specific data format, and an electronic file having a specific data format is created from the converted partial data. Each time the converted partial data is created, it is determined whether or not there is a free capacity in the second storage device that can store the converted partial data. If there is no free capacity, the second storage device The converted partial data is deleted. According to this, in addition to the effect of the invention according to any one of claims 1 to 5, it is possible to prevent the incompletely converted file from being stored in the second storage device, and the free capacity of the second storage device. Can be secured.

  In the display device according to the seventh aspect of the present invention, the unsupported data includes file data each indicating a plurality of data configured in units of pages. The post-conversion size is calculated based on the number of pages corresponding to the quantity of file data included in the unsupported data. According to this, in addition to the effect of the invention according to any one of claims 1 to 6, the post-conversion size of unsupported data can be calculated by a simple process.

  In the display device according to the eighth aspect, when the conversion to the electronic file of the specific data format is completed, the electronic file stored in the second storage device is displayed in a selectable manner. According to this, in addition to the effect of the invention according to any one of claims 2 to 5, the user can grasp the electronic file that has been converted, and can select and display or edit an arbitrary electronic file. Can do.

  In the data conversion method according to the ninth aspect of the present invention, a post-conversion size that is a data size when the unsupported data acquired from the first storage device is converted into an electronic file having a specific data format is calculated. If the converted size is less than or equal to the free capacity of the second storage device, the unsupported data is converted into an electronic file of a specific data format, and the electronic file is stored in the second storage device. According to this, although the unsupported data is converted into an electronic file of a specific data format, it is possible to suppress the occurrence of a problem that the electronic file cannot be stored in the second storage device.

  In the data conversion program of the invention according to claim 10, a post-conversion size that is a data size when the unsupported data acquired from the first storage device is converted into an electronic file of a specific data format is calculated. If the converted size is less than or equal to the free capacity of the second storage device, the unsupported data is converted into an electronic file of a specific data format, and the electronic file is stored in the second storage device. According to this, although the unsupported data is converted into an electronic file of a specific data format, it is possible to suppress the occurrence of a problem that the electronic file cannot be stored in the second storage device.

1 is a system configuration diagram in which a portable terminal 1 and a multifunction device 2 are connected. 3 is a block diagram showing an electrical configuration of the mobile terminal 1. FIG. It is a flowchart which shows a main process. It is a front view of the portable terminal 1 with which the screen 31 during conversion was displayed. It is a flowchart which shows a data conversion process. It is a flowchart which shows a conversion target selection process. It is a flowchart which shows a memory full process. It is a front view of the portable terminal 1 with which the memory full screen 32 was displayed.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below with reference to the drawings. The drawings to be referred to are used for explaining the technical features that can be adopted by the present invention, and the configuration of the apparatus and the flowcharts of various processes described are not intended to be limited thereto. This is just an illustrative example.

  A mobile terminal 1 according to an embodiment of the present invention will be described with reference to FIGS. The portable terminal 1 according to the present embodiment is connected to a multifunction device 2 having functions as a printing device, a communication device, a telephone, a facsimile, a scanner, and a copier via a USB (Universal Serial Bus) cable 9. And the case where an image display is performed in the portable terminal 1 based on the electronic file output from the multifunction device 2 is illustrated. Note that the electronic file of the present embodiment is file data indicating a document composed of a plurality of pages, and is configured by image data for the number of pages constituting the document (that is, image data indicating an image in units of pages). Shall be.

  First, the physical configuration of the mobile terminal 1 will be described with reference to FIG. The portable terminal 1 is a lightweight and thin portable display terminal provided with an electrophoretic display panel 3. As the display panel 3, in addition to the electrophoretic display panel, a light and thin reflective liquid crystal can be applied. The basic principle of an electrophoretic display panel is that positively charged white electrophoretic particles and negatively charged black electrophoretic particles are moved in a display liquid by electrophoresis to form an image in black and white.

  The mobile terminal 1 is formed in a rectangular plate shape having a predetermined thickness in plan view, and a rectangular display panel 3 in plan view is formed on the upper surface thereof. The display panel 3 displays various contents including text, charts, and the like. These contents are visible to the user from the display surface of the display panel 3. Although not shown, the side surface of the mobile terminal 1 is provided with a card slot for inserting the memory card 30 (see FIG. 2), a USB port to which a USB connector of the USB cable 9 is attached and detached, and the like.

  An operation unit 6 for operating the mobile terminal 1 is provided on the right side of the display panel 3. The operation unit 6 includes a power key 61, a menu key 62, a document close key 63, an enlargement key 64, a page return key 65, a page feed key 66, and a character key 67 (see FIGS. 4 and 8). The power key 61 is a key for turning on / off the power of the mobile terminal 1. The menu key 62 is a key for displaying a menu screen for performing electronic file selection, function setting, and the like of the mobile terminal 1. The document close key 63 is a key for closing the electronic file being displayed. The enlargement key 64 is a key for enlarging the electronic file being displayed. The page return key 65 and the page feed key 66 are keys for returning and feeding the page of the electronic file being displayed, respectively. The character key 67 is a key for selecting and inputting various information. Note that an LED display unit 7 (see FIGS. 4 and 8) is provided on the upper side of the power key 61. The LED display unit 7 indicates the operation state of the mobile terminal 1 with LED emission patterns (emission color, lighting, blinking, etc.).

  Next, the electrical configuration of the mobile terminal 1 will be described with reference to FIG. The control board 10 of the portable terminal 1 includes a CPU 11, a ROM 12, a RAM 13, an EEPROM 14, a display controller 15, a key controller 16, a memory card I / F 17, a USB interface (I / F) 18, and a power controller 19. Are connected via a bus 8. The CPU 11 controls the mobile terminal 1. The ROM 12 stores a control program for operating the mobile terminal 1 and setting information related to the operation of the mobile terminal 1. The RAM 13 is a memory that temporarily stores various data. The EEPROM 14 is a non-volatile memory that stores various data.

  The display controller 15 controls image display on the display panel 3. The key controller 16 receives a key operation on the operation unit 6. The memory card I / F 17 is connected to the memory card 30 inserted in the card slot, and reads / writes data from / to the memory card 30. The USB I / F 18 has the above-described USB port, and transmits and receives data to and from an external device (here, the multifunction device 2) via the USB cable 9. The power controller 19 controls charging / discharging of the battery 80 built in the mobile terminal 1 and supplying power, detects the remaining battery level and voltage drop of the battery 80, and controls the voltage supplied to the mobile terminal 1. Or

  In the mobile terminal 1 according to the present embodiment, the electronic file is not stored in the mobile terminal 1 itself, but based on the electronic file stored in the memory card 30 (specifically, page unit image data included in the electronic file). Thus, an image is displayed on the display panel 3. And the memory card 30 should just memorize | store the electronic file output from the multifunction device 2 in the aspect illustrated below.

  For example, when the memory card 30 is inserted into a card slot (not shown) of the multifunction device 2 and an electronic file is acquired by the multifunction device 2 by reading an image of a paper medium, the electronic file is stored in the memory card 30. Let it be written. Then, the memory card 30 in which the electronic file is stored may be removed from the multifunction device 2 and inserted into the card slot of the portable terminal 1. As a result, the portable terminal 1 can read the electronic file written in the memory card 30 and display an image.

  Further, when an electronic file is acquired by image reading of a paper medium or the like with the multifunction device 2, the electronic file is transferred from the multifunction device 2 to the portable terminal 1 via the USB cable 9 and inserted into the portable terminal 1. You may make it write in the memory card 30. Such transfer and writing of the electronic file may be realized by a function called a known scan-to-memory provided in the multifunction machine 2 (see, for example, JP-A-2008-187495). Also in this case, the mobile terminal 1 can read the electronic file written in the memory card 30 and display an image.

  The memory card 30 is a general-purpose storage medium that can carry not only electronic files used for image display on the portable terminal 1 but also various data. Therefore, when an electronic file is output from the multifunction device 2 to the memory card 30, the electronic file is stored in a specific folder of the memory card 30. As a result, among the data stored in the memory card 30, the electronic file used for image display on the portable terminal 1 can be clearly distinguished from other data.

  However, the electronic file acquired by the multifunction device 2 is normally created in a general-purpose data format (for example, PDF, JPEG, etc.) that can be browsed and displayed by many electronic devices. On the other hand, in the mobile terminal 1 of the present embodiment, image display is performed based on an electronic file in a data format suitable for the mobile terminal 1 for which display control or the like in the electrophoresis system is performed (hereinafter, a specific data format). Therefore, in the portable terminal 1, when the electronic file stored in the memory card 30 is unsupported data in another data format different from the specific data format, the specific data format is displayed before the electronic file is displayed as an image. The details will be described later.

  In the present embodiment, when a plurality of electronic files are stored in the memory card 30, the electronic files are selected one by one and sequentially converted into a specific data format. Therefore, the EEPROM 14 stores information (hereinafter referred to as conversion target file setting) indicating a priority order for selecting a conversion target among a plurality of electronic files. In this embodiment, “memory priority”, “battery priority”, “date and time priority”, and “progress priority” are prepared in advance as the conversion target file settings, and details thereof will be described later. The user can press the menu key 62 at an arbitrary timing to display a menu screen, and can specify an arbitrary conversion target file setting from the menu screen. The conversion target file setting selected by the user is stored in the EEPROM 14. In the following description, it is assumed that the conversion target file setting “memory priority” is set in the EEPROM 14.

  Below, with reference to FIGS. 3-8, the various processes performed with the portable terminal 1 are demonstrated. First, with reference to FIG. 3, the main process performed with the portable terminal 1 is demonstrated. The main process shown in FIG. 3 is executed by the CPU 11 based on a control program stored in the ROM 12 when the power key 61 is turned on.

  As shown in FIG. 3, in the main process, first, it is determined whether or not the USB cable 9 is disconnected from the portable terminal 1 (S1). In S <b> 1, when it is detected that the USB cable 9 is connected to the USB I / F 18 and the USB cable 9 is not connected, it is determined that the USB cable 9 is disconnected from the portable terminal 1. (S1: YES). On the other hand, if the USB cable 9 is not connected to the USB I / F 18 or if the USB cable 9 is not connected, it is determined that the USB cable 9 has not been disconnected from the portable terminal 1 (S1). : NO).

  When the USB cable 9 is not disconnected from the portable terminal 1 (S1: NO), it is determined whether or not the memory card 30 is newly inserted into the portable terminal 1 (S3). In S3, when the memory card 30 is not connected to the memory card I / F 17 and it is detected that the memory card 30 is changed to the connected state, it is determined that the memory card 30 is inserted into the portable terminal 1. (S3: YES) On the other hand, when the memory card 30 is connected to the memory card I / F 17 or when there is no change in the state where the memory card 30 is not connected, it is determined that the memory card 30 has not been inserted into the mobile terminal 1. (S3: NO).

  When the USB cable 9 is disconnected from the portable terminal 1 (S1: YES), there is a possibility that the electronic file has been transferred / written via the USB cable 9. When the memory card 30 is inserted into the mobile terminal 1 (S3: YES), there is a possibility that an electronic file has been written in advance on the memory card. As described above, the electronic file used for image display on the portable terminal 1 is stored in a specific folder of the memory card 30. Therefore, it is determined whether or not there is a specific folder in the memory card 30 connected to the memory card I / F 17 (S5). If there is a specific folder in the memory card 30 (S5: YES), it is determined whether an electronic file is stored in the specific folder (S7).

  If an electronic file is stored in the specific folder (S7: YES), the in-conversion screen 31 illustrated in FIG. 4 is displayed on the display panel 3 (S9). As shown in FIG. 4, the in-conversion screen 31 clearly indicates that the data format of the electronic file is being converted (hereinafter, data conversion is in progress). Further, the LED display unit 7 is controlled to emit light in a specific pattern corresponding to the data conversion, and the key operation on the operation unit 6 is invalidated.

  In this embodiment, when a predetermined execution timing (here, the USB cable 9 is removed or the memory card 30 is inserted) is detected, an electronic input instruction is required as described later without requiring a user input instruction. File data conversion is performed internally. For this reason, if the user performs various operations during the data conversion, the electronic file may be damaged or the mobile terminal 1 may malfunction. In this regard, the user can recognize that data conversion is in progress by displaying the conversion in progress screen 31 or executing the LED display unit 7 to emit light in a specific pattern when executing data conversion. Further, by invalidating the key operation on the operation unit 6, it is possible to prevent a user's erroneous operation during data conversion.

  If the memory card 30 is not inserted into the portable terminal 1 (S3: NO), the process returns to S1 and waits for the USB cable 9 to be removed or the memory card 30 to be inserted (S1 to S3). Similarly, when there is no specific folder in the memory card 30 (S5: NO) or when an electronic file is not stored in the specific folder (S7: NO), the process returns to S1 in the same manner.

  After the in-conversion screen is displayed in S9, it is determined whether there is a convertible electronic file (hereinafter, convertible file) in the specific folder (S11). In S11, if there is a general-purpose data format (in this case, PDF or JPEG) that can be converted into a specific data format among the electronic files stored in the specific folder, there is a convertible file. Judgment is made (S11: YES). If there is a convertible file in the specific folder (S11: YES), a data conversion process for converting the convertible file into a specific data format is executed (S13).

  As shown in FIG. 5, in the data conversion process (S13), first, a conversion target for selecting a file to be converted (hereinafter referred to as a conversion target file) from among convertible files stored in a specific folder. A selection process is executed (S51).

  As shown in FIG. 6, in the conversion target selection process (S51), it is first determined whether or not the conversion target file setting stored in the EEPROM 14 is “memory priority” (S101). In this embodiment, since the conversion target file setting is set to “memory priority” in advance (S101: YES), the conversion target file is selected in the priority order corresponding to the conversion target file setting “memory priority”. That is, among the unselected convertible files, a file with a large file size is selected as a conversion target file (S103). “Unselected convertible file” refers to a convertible file that is not yet selected as a conversion target file in the conversion target selection process (S51) when a plurality of convertible files are stored in a specific folder.

  On the other hand, when the conversion target file setting is “battery priority”, “date and time priority”, or “progress priority”, the conversion target file setting is not “memory priority” (S101: NO), and therefore, according to the conversion target file setting. The conversion target file is selected in the priority order (S105). Specifically, when the conversion target file setting is “battery priority”, an unselected convertible file having a smaller file size is selected as the conversion target file. When the conversion target file setting is “date and time priority”, among the unselected convertible files, the file with the new registration date and time is selected as the conversion target file. When the conversion target file setting is “progress priority”, among the unselected convertible files, the file with the oldest registration date is selected as the conversion target file.

  Note that the conversion target file selected in S103 or S105 is read from the memory card 30 into the RAM 13. Then, the process returns to the data conversion process (FIG. 5).

  Returning to FIG. 5, when a conversion target file is selected in the conversion target selection process (S51), a predicted file size when the conversion target file is converted into a specific data format is calculated (S53). In S53, for example, it may be calculated by multiplying the quantity of image data included in the conversion target file by the conversion rate of the data size when the data format of the conversion target file is converted into a specific data format. In the present embodiment, since the conversion target file includes image data (file data) in units of pages, the amount of image data (that is, the number of pages of the document) is calculated by multiplying the conversion rate of the data size. . As the “data size conversion rate”, an average file size increase rate or decrease rate when the data is converted into a specific data format for each other data format may be obtained in advance through experiments or calculations. Specifically, the conversion rate of the data size when converting an electronic file in JPEG format into a specific data format is “70%”, and the conversion of data size when converting an electronic file in PDF format into a specific data format The rate is “85%”.

  Next, it is determined whether or not the predicted file size calculated in S53 is less than or equal to the free capacity of the memory card 30 (S55). If the predicted file size is less than or equal to the free space of the memory card 30 (S55: YES), when the converted file is converted to another data format, the converted file is written to the memory card 30 and the free space is insufficient. Not expected. Therefore, one page of image data included in the conversion target file stored in the RAM 13 is converted into a specific data format on the RAM 13 (S57). Then, the image data converted in S57 is written in the empty area of the memory card 30 and stored in the storage folder, and it is determined whether or not the converted image data can be written in the memory card 30 ( S59).

  When the converted image data can be written in the memory card 30 (S59: YES), it is determined whether or not the image data of all pages included in the conversion target file has been converted (S61). If there is unconverted image data included in the conversion target file (S61: NO), the process returns to S57 and the image data corresponding to the next page is converted into another data format in the same manner as described above. . As a result, S57 to S61 are repeatedly executed so that the image data included in the conversion target file is sequentially converted unless a state in which data cannot be written to the memory card 30 described later (S59: NO).

  When the image data of all pages included in the conversion target file has been converted (S61: YES), the converted file composed of the converted image data is stored in the storage folder of the memory card 30 It becomes. Then, the conversion-source electronic file (that is, the conversion target file) stored in the specific folder of the memory card 30 is deleted (S63), and the process returns to the main process (FIG. 3). As a result, the same electronic file with different data formats in the memory card 30 is not repeatedly stored, so that the free space of the memory card 30 can be secured and the electronic file in the specific folder is converted many times. Can prevent malfunctions.

  On the other hand, when the predicted file size is larger than the free capacity of the memory card 30 (S55: NO), it is predicted that the free capacity of the memory card 30 will be insufficient when the converted file is written. Even if the predicted file size is equal to or less than the free space of the memory card 30 (S55: NO), the total data size of the converted image data is changed in the process of executing the data conversion in units of image data in S57. In some cases, the file size becomes larger than the predicted file size, and the converted image data cannot be written because the free space of the memory card 30 is insufficient (S59: NO). In these cases, the following memory full process is executed (S65).

  As shown in FIG. 7, in the memory full process (S65), it is first determined whether or not there is an electronic file being converted (S201). Specifically, when the predicted file size is equal to or less than the free space of the memory card 30 (S55: NO), the data conversion in S57 is not performed, and thus there is no electronic file being converted (S65: NO). On the other hand, if the converted image data cannot be written (S59: NO), since a part of the image data included in the conversion target file has been converted in S57, there is an electronic file being converted (S65). : YES). In this case, the electronic file being converted (that is, the converted image data) is deleted from the storage folder of the memory card 30 (S203). Thereby, it is possible to prevent an incompletely converted file from being stored in the memory card 30 and to secure a free space in the memory card 30. Since the conversion source electronic file (that is, the conversion target file) stored in the specific folder of the memory card 30 is not deleted, the same electronic file is converted again after the free space of the memory card 30 is secured. be able to.

  If there is no electronic file being converted (S201: NO), or if the electronic file being converted is deleted (S203), it is referred to the EEPROM 14 whether the conversion target file setting is “memory priority” or not. Determination is made (S205). In this embodiment, since the conversion target file setting is “memory priority” (S205: YES), it is then determined whether or not an unselected convertible file exists in the specific folder (S207). If there is an unselected convertible file (S207: NO), “There is free space” is set in the predetermined storage area of the RAM 13 (S209).

  As described above, in the case of “memory priority”, convertible files are selected in descending order of file size, so that the next selectable convertible file has a smaller file size than the current conversion target file. Therefore, even when the free space of the memory card 30 is insufficient to write the converted file based on the current conversion target file, it may be sufficient to write the converted file based on the next conversion target file. . Therefore, if the conversion target file setting is “memory priority” and there is an unselected convertible file, the next conversion is performed as described later by setting “free space” in S209. Data conversion of the target file is executed.

  On the other hand, if the conversion target file setting is any one of “battery priority”, “date and time priority”, and “progress priority”, the conversion target file setting is not “memory priority” (S205: NO). Is set to “no free space” (S211). That is, if the conversion target file setting is not “memory priority”, the file size of the next conversion target file is not necessarily smaller than the current conversion target file, and therefore “no free space” is set in S211. Thus, the data conversion is stopped as will be described later. If there is no unselected convertible file (S207: YES), there is no next conversion target file even if the conversion target file setting is “memory priority”. “No free space” is set in the area (S211).

  After S209 or S211 is executed, the process returns to the data conversion process (FIG. 5) and then returns to the main process (FIG. 3). Then, after the data conversion process (S13), it is determined whether or not the memory card 30 has a free space with reference to a predetermined storage area of the RAM 13 (S15). The determination in S15 is made based on “no free space” or “free space” set in a predetermined storage area of the RAM 13.

  When “with free space” is set in the predetermined storage area of the RAM 13 (S15: YES), it is determined whether or not an electronic file is stored in the specific folder of the memory card 30 (S17). When the electronic file is not stored in the specific folder (S17: YES), all the electronic files stored in the specific folder are converted into a specific data format (that is, all the electronic files have been converted). File is created). Therefore, a folder display screen for displaying a list of converted files stored in the storage folder of the memory card 30 is displayed on the display panel 3 (S19). On this folder display screen, the user can browse a document based on the converted file by operating the character key 67 and selecting an arbitrary converted file, for example.

  On the other hand, if an electronic file is stored in the specific folder (S17: NO), the process returns to S11 to determine whether there is a convertible file in the specific folder. Similarly to the above description, if there is a convertible file, the data conversion process is executed (S11: YES, S13). In this data conversion process (FIG. 5), the file having the largest file size among the unselected convertible files, in other words, the file having the next largest file size after the previous conversion target file is selected as the conversion target file. (S51). Then, the data conversion (S53 to S63) or the memory full process (S65) similar to the above is executed for the conversion target file.

  Thus, in this embodiment, the electronic files are sequentially converted into a specific data format until there are no more electronic files stored in the specific folder of the memory card 30. Then, the converted file is stored in the converted folder of the memory card 30, and the conversion source electronic file is deleted from the specific folder. Even if the free space of the memory card 30 is insufficient, if the converted file based on another electronic file can be written to the free space, the electronic file is sequentially converted into a specific data format. Thereby, it is possible to convert a larger number of electronic files into a specific data format by using the free space of the memory card 30 to the maximum.

  If there is no convertible file in the specific folder (S11: NO), a conversion impossible screen indicating that data conversion cannot be executed is displayed on the display panel 3 (S21), and then the above-described folder display screen is displayed. (S19). As a result, only convertible files among the electronic files stored in the specific folder are converted into a specific data format, and the converted display created before the convertible file disappears in the folder display screen of S19. A list of files appears.

  When “no free space” is set in the predetermined storage area of the RAM 13 (S15: NO), a memory full screen 32 as illustrated in FIG. 8 is displayed on the display panel 3 (S23). The above-described folder display screen is displayed (S19). As shown in FIG. 8, the memory full screen 32 clearly indicates that there is no free space in the memory card 30 for storing the converted file. As a result, a larger number of electronic files are converted into a specific data format until the free space of the memory card 30 runs out completely, and the folder display screen of S19 is created until the free space of the memory card 30 runs out. The converted files that have been converted are listed.

  When the folder display screen is displayed in S19, the LED display unit 7 is controlled to be displayed in a normal pattern (here, in a non-lighted state), the key operation in the operation unit 6 is validated, and the process returns to S1. . Each time a predetermined execution timing (that is, the USB cable 9 is removed or the memory card 30 is inserted) is detected until the power of the mobile terminal 1 is turned off (S1, S3), Data conversion is executed in the same manner as above (S5 to S19).

  As described above, in the mobile terminal 1 of the present embodiment, the predicted file size when an electronic file of another data format acquired from the memory card 30 is converted into a specific data format is calculated. If the predicted file size is less than or equal to the free space of the memory card 30, the acquired electronic file is converted into a specific data format, and the converted file is stored in the memory card 30. Therefore, it is possible to suppress the occurrence of a problem that the converted file cannot be stored in the electronic file even though the electronic file of another data format is converted into a specific data format.

  By the way, in the said embodiment, the portable terminal 1 is corresponded to the "display apparatus" of this invention. The memory card 30 corresponds to the “first storage device”, “second storage device”, and “common storage device” of the present invention. The CPU 11 that executes the conversion target selection process (FIG. 6) in S51 corresponds to the “unsupported data acquisition unit” of the present invention. The CPU 11 that executes S53 corresponds to the “post-conversion size calculation means” of the present invention. The CPU 11 that executes S55 corresponds to the “first capacity determination unit” of the present invention. The CPU 11 that executes S57 corresponds to “conversion means” and “conversion data storage control means” of the present invention. The CPU 11 that executes S61 corresponds to the “completion determining unit” of the present invention. The CPU 11 that executes S63 corresponds to the “first deletion unit” of the present invention. The memory card I / F 17 corresponds to the “mounting unit” of the present invention. The CPU 11 that executes S59 corresponds to the “second capacity determination unit” of the present invention. The CPU 11 that executes S203 corresponds to the “second deletion unit” of the present invention. The CPU 11 that executes S19 corresponds to the “converted file display control means” of the present invention.

  Further, the conversion target selection process (FIG. 6) in S51 corresponds to the “unsupported data acquisition step” of the present invention. S53 corresponds to the “converted size calculation step” of the present invention. S55 corresponds to the “first capacity determination step” of the present invention. S57 corresponds to the “conversion step” and “conversion data storage control step” of the present invention, respectively. The control program that causes the CPU 11 to execute the main process (FIG. 3) corresponds to the “data conversion program” of the present invention.

  In addition, this invention is not limited to the said embodiment, The change in the range which does not change the summary of invention is possible. For example, in the above-described embodiment, the portable terminal 1 that displays an image on the electrophoretic display panel 3 is illustrated, but a display device that displays an image on a known liquid crystal display or the like may be used. It may be a stationary display device such as a frame.

  Moreover, in the said embodiment, it is not necessary to provide the memory | storage device for preserve | saving various files in the portable terminal 1 itself by memorize | storing both the electronic file before conversion in the memory card 30, and the converted file, and the portable terminal 1 itself. However, the present invention is not limited to this. For example, a built-in memory for storing various files may be provided in the portable terminal 1, and both the electronic file before conversion and the converted file may be stored in the built-in memory. Furthermore, the storage device storing the electronic file before conversion may be different from the storage device storing the converted file. For example, the electronic file before conversion may be stored in the memory card 30, and the converted file obtained by converting the electronic file may be stored in the built-in memory.

  Moreover, in the said embodiment, although the converted file is stored in the preservation | save folder of the memory card 30, the storage position of the converted file can be made arbitrary. Further, in the folder display screen of S19, the storage folder is displayed so that the converted file can be selected, but the converted file may be displayed so as to be selectable. For example, the converted file may be directly stored in the root directory of the memory card 30, and the root directory may be displayed on the folder display screen in S19 so that the converted file can be selected.

  In the above embodiment, if the conversion target file setting is not “memory priority”, “no free space” is set and data conversion is stopped (S205: NO, S111), but the present invention is not limited to this. For example, in the memory full process (FIG. 7), the determination in S205 may not be provided. According to this, even if the conversion target file setting is “battery priority”, “date / time priority”, or “progress priority”, if there is an unselected file, “with free space” is set. (S207: YES, S209) Data conversion can be performed for the next conversion target file. In the above-described embodiment, unconverted convertible files are selected one by one as a conversion target file (see FIG. 6), and after the conversion of the selected one conversion target file is completed, the next conversion target file is changed again. One is selected. However, in the conversion target selection process shown in FIG. 6, it is only necessary to acquire a predetermined number of conversion target files, and the predetermined number is not limited to one. For example, a plurality of conversion target files may be selected at a time as a predetermined number of conversion target files, or the predetermined number of conversion target files to be selected may be changed.

DESCRIPTION OF SYMBOLS 1 Portable terminal 2 Multifunction machine 3 Display panel 6 Operation part 9 USB cable 10 Control board 11 CPU
12 ROM
13 RAM
14 EEPROM
15 Display controller 16 Key controller 17 Memory card I / F
18 USB I / F
19 Power controller 30 Memory card 31 Conversion screen 32 Memory full screen 80 Battery

Claims (10)

A display device that displays an electronic file in a specific data format,
Uncorresponding data acquisition means for acquiring the uncorresponding data from the first storage device storing uncorresponding data in a data format different from the specific data format;
A post-conversion size calculation unit that calculates a post-conversion size that is a data size when the non-corresponding data acquired by the non-corresponding data acquisition unit is converted into an electronic file of the specific data format;
First capacity determining means for determining whether or not the converted size calculated by the converted size calculating means is less than or equal to the free capacity of the second storage device;
When the first capacity determining unit determines that the converted size is equal to or less than the free capacity of the second storage device, the unsupported data acquired by the unsupported data acquiring unit is stored in the specific data format. Conversion means for converting to an electronic file;
A display device comprising: conversion data storage control means for storing the electronic file of the specific data format converted by the conversion means in the second storage device. The first storage device and the second storage device are one common storage device,
The unsupported data acquisition means acquires a predetermined number of the unsupported data stored in the common storage device,
The converted size calculating unit converts the predetermined number of unsupported data into an electronic file of the specific data format each time the predetermined number of unsupported data is acquired by the unsupported data acquisition unit. Calculating the converted size of
The display device
Completion determination means for determining whether or not the conversion by the conversion means has been completed for the predetermined number of unsupported data acquired by the unsupported data acquisition means;
A first deleting unit that deletes the predetermined number of unsupported data that has been converted from the common storage device when the completion determining unit determines that the conversion by the converting unit has been completed;
Further, the unsupported data acquisition unit acquires the next unsupported data from the common storage device when the predetermined number of unsupported data is deleted by the first deletion unit. The display device according to claim 1. The common storage device is an external storage device that can be attached to and detached from a plurality of devices.
The display device according to claim 2, wherein the display device further includes mounting means for attaching and detaching the external storage device.   4. The unsupported data acquisition unit preferentially acquires the unsupported data having the largest data size among the unsupported data stored in the first storage device. The display device described in 1.   The unsupported data acquisition means, when the first capacity determination means determines that the converted size is larger than the free capacity of the second storage device, the data size next to the currently unsupported data The display device according to claim 4, wherein the unsupported data having a large value is acquired with priority. The unsupported data includes a plurality of partial data configured in a predetermined unit,
The converting means converts the plurality of partial data included in the unsupported data one by one into the specific data format, and stores the converted partial data created by the conversion in the second storage device To create an electronic file of the specific data format,
Each time the converted partial data is created by the converting means, second capacity determining means for determining whether or not there is a free capacity capable of storing the converted partial data in the second storage device;
A second deleting means for deleting the converted partial data stored in the second storage device when the second capacity determining means determines that there is no free capacity capable of storing the converted partial data; The display device according to claim 1, further comprising a display device. The unsupported data includes file data each indicating a plurality of data configured in units of pages,
The post-conversion size calculation means is configured to convert the non-corresponding data into the electronic file having the specific data format based on the number of pages corresponding to the quantity of the file data included in the non-corresponding data. The display device according to claim 1, wherein a size is calculated.   When the completion determining means determines that the conversion by the converting means has been completed, it comprises a converted file display control means for selectively displaying the electronic file stored in the second storage device. The display device according to claim 2. In a display device for displaying an electronic file of a specific data format, a data conversion method for converting unsupported data of a data format different from the specific data format into an electronic file of the specific data format,
From the first storage device that stores the unsupported data, an unsupported data acquisition step of acquiring the unsupported data;
A post-conversion size calculation step of calculating a post-conversion size that is a data size when the non-corresponding data acquired in the non-corresponding data acquisition step is converted into an electronic file of the specific data format;
A first capacity determination step of determining whether or not the converted size calculated by the converted size calculation step is equal to or less than a free capacity of the second storage device;
If it is determined in the first capacity determination step that the converted size is equal to or less than the free capacity of the second storage device, the unsupported data acquired in the unsupported data acquisition step is stored in the specific data format. A conversion step for converting to an electronic file;
A data conversion method comprising: a conversion data storage control step for storing the electronic file of the specific data format converted by the conversion step in the second storage device. A data conversion program that is used in a display device that displays an electronic file in a specific data format, and that converts unsupported data in a data format different from the specific data format into an electronic file in the specific data format,
On the computer,
From the first storage device that stores the unsupported data, an unsupported data acquisition step of acquiring the unsupported data;
A post-conversion size calculation step of calculating a post-conversion size that is a data size when the non-corresponding data acquired in the non-corresponding data acquisition step is converted into an electronic file of the specific data format;
A first capacity determination step of determining whether or not the converted size calculated by the converted size calculation step is equal to or less than a free capacity of the second storage device;
If it is determined in the first capacity determination step that the converted size is equal to or less than the free capacity of the second storage device, the unsupported data acquired in the unsupported data acquisition step is stored in the specific data format. A conversion step for converting to an electronic file;
A conversion data storage control step of causing the second storage device to store the electronic file of the specific data format converted by the conversion step.

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