WO2011125643A1

WO2011125643A1 - Display system and display method

Info

Publication number: WO2011125643A1
Application number: PCT/JP2011/057775
Authority: WO
Inventors: 愛秦
Original assignee: ブラザー工業株式会社
Priority date: 2010-03-31
Filing date: 2011-03-29
Publication date: 2011-10-13
Also published as: JP2011215892A

Abstract

Disclosed are a display system capable of properly associating and managing image data and added information, and a display method. A display device requests, from a main device body, display images necessary for displaying a slideshow (S11). The main device body transmits the display images to the display device (S13). The display device displays the received display images in order. A user inputs an inserted image via the touch panel of the display device (S15). The display device displays the inserted image over the display images in the display. The user inputs an inserted image again (S17). In cases in which the storage capacity of a flash memory is decreased, the display device associates the identification information of the corresponding display image with the input inserted image and transmits the image to the main device body (S19). The main device body generates and stores an additional image by combining the received inserted image and the display image corresponding to the received identification information.

Description

Display system and display method

The present invention relates to a display system and a display method. More specifically, the present invention relates to a display system and a display method capable of performing handwritten input on a display device.

Conventionally, a display system and a display device that can be used by separating the display device from the main device have been proposed. For example, the display device described in Patent Literature 1 includes a main device and a display device that are separable from each other. The main device transmits image data to the display device by performing wireless communication with the display device. The display device stores the image data received from the main device in the storage unit, and displays the image on the display.

The size of the display device is limited, and the storage capacity of the storage device included in the display device may be limited. In this case, the display device cannot store all image data to be displayed in the storage unit. Therefore, the display device needs to receive image data scheduled to be displayed soon from the main device and store it in the storage means. The received image data is deleted from the display device after the display on the display is completed.

JP 2006-258988 A

The user may input additional information for the image displayed on the display. For example, when the display device includes a touch panel, the user can input handwritten information on an image displayed via the touch panel. The display device needs to store the input handwritten information and the image data in association with each other. However, in the above-described display device, the image data that has been displayed on the display is deleted, so that handwritten information is input to the image data and then handwritten information is associated with the image data on the main device side. There is a problem that can not be managed.

An object of the present invention is to provide a display system and a display method capable of appropriately managing image data and additional information in association with each other.

A display system according to a first aspect of the present invention is a display system including at least a display device including a display unit that displays an image and a main device that manages the image, and the display device is determined by a user. A correspondence table in which a reception unit that receives an input of information, first identification information that identifies the image, and second identification information that identifies reception information received by the reception unit is associated with the reception information. The first control means stored in the storage means, the first identification information stored in the correspondence table stored in the first control means, and the second identification information corresponding to the first identification information. First determination means for determining whether or not to transmit the specified reception information in association with the main device based on the state of the display device; and the first determination means The first identification information and the reception information when it is determined to transmit the first identification information and the reception information to the main device, the main device, Receiving means for receiving the first identification information and the reception information transmitted from the display device by the first transmission means; and storing the first identification information and the reception information received by the reception means in a second memory Second control means for storing in the means.

According to the first aspect of the present invention, the second identification information for identifying the reception information input by the user via the display device is associated with the first identification information for identifying the image displayed on the display means, A table is created. Based on the state of the display device, it is determined whether or not to transmit the first identification information and the reception information to the main device. When the necessity of transmitting the first identification information and the reception information to the main device is high, for example, when the free capacity of the storage unit of the display device is small, the display device receives the first identification information and the reception based on the correspondence table. Information can be sent to the main device. In the main device, the first identification information and the reception information can be received and stored in the storage means. Accordingly, the display system can accurately store the first identification information and the reception information in the main device. It is possible to prevent the first identification information and reception information stored in the display device from being erased.

In the first aspect, the main device extracts the image specified by the first identification information received by the receiving unit from a third storage unit in which the image is stored. A creation means for creating an additional image by adding the reception information associated with the identification information to the extracted image may be provided. The main device can create the additional image by adding the reception information received via the display device to the image. The main device can appropriately create an additional image with reception information added on the image. Even when reception information is input to an image that is not owned by the display device, the display system can create an additional image. Since the display device does not need to store all the images, the storage capacity of the storage means that must be mounted on the display device can be reduced.

Further, in the first aspect, the first determination unit may determine to transmit the first identification information and the reception information when a free capacity of the first storage unit becomes a predetermined amount or less. Accordingly, the display device can prevent a state in which the received reception information and image cannot be stored due to a lack of free space in the first storage unit.

In the first aspect, the display device includes an acquisition unit that acquires a communication state with the main device, and the first determination unit is configured such that the communication state acquired by the acquisition unit satisfies a predetermined condition. In addition, the first identification information and the reception information may be transmitted. Accordingly, the display device can transmit the first identification information and the reception information to the main device when the communication state with the main device is good. The display device can reliably transmit the first identification information and the reception information to the main device and store the information in the main device. The display device can prohibit transmission of the first identification information and the reception information when the communication state with the main device is poor. When the communication state is poor, it is necessary to perform communication with an error detection / correction code added or retransmission communication, and power consumption required for communication increases. Therefore, the display device can suppress power consumption required for communication by transmitting information when the communication state is good.

In the first aspect, the main device includes second transmission means for transmitting the image stored in the third storage means to the display device, and the second transmission means is added by the creation means. When an image has been created, the additional image may be transmitted to the display device instead of the image. The display device can receive an image from the main device and display it on the display means. Since the display device can receive and store only a necessary amount of images from the main device when an image is needed, the capacity of the storage means necessary for storing the images can be suppressed. The main device can transmit the additional image to the display device. The display device can receive the additional image transmitted from the main device and display it on the display means. The display device can display an additional image in which reception information received from the user is added to the image. By inputting the reception information, the user can subsequently visually recognize the additional image in which the reception information is added to the image.

In the first aspect, the first control unit stores the correspondence table in which a plurality of the first identification information and one second identification information are associated with each other in the first storage unit, The one transmission means may transmit a plurality of the first identification information and the one reception information in association with each other. As a result, the display device can suppress the data amount at the time of transmission as compared with the case where the first identification information and the reception information are associated with each other on a one-to-one basis and transmitted to the main device. The display device can efficiently transmit the first identification information and the reception information to the main device.

Moreover, in the first aspect, when the plurality of first identification information and one piece of the reception information are associated with each other, the creation unit is specified by each of the first identification information. A plurality of the additional images may be created by adding one reception information to the image. As a result, the main device selects the image corresponding to the first identification information from the third storage means and adds the reception information even when a plurality of pieces of the first identification information are associated with one piece of reception information. A plurality of additional images can be created. The main device can appropriately create additional information while suppressing the amount of communication between the display device and the main device.

In the first aspect, the main device extracts the image specified by the first identification information received by the receiving unit from a third storage unit in which the image is stored, and the receiving unit Third receiving means for transmitting to the display device together with the reception information received by the information processing apparatus may be provided. Thus, the main device can transmit the reception information and the image in association with each other to the display device. Since the display device can acquire the reception information and the image separately, the user can perform editing to process only the reception information again.

In the first aspect, the display device includes supply means for supplying electric power for driving the display device, and capacity specifying means for specifying the remaining capacity of the supply means, and is specified by the capacity specifying means. When the remaining capacity is equal to or less than a predetermined amount, a third control unit may be provided that stores the reception information received by the reception unit in a nonvolatile fourth storage unit. Thus, when the remaining capacity of the supply unit is reduced while receiving the reception information, the display device can store the reception information being received in the nonvolatile storage unit. The display device can prevent the reception information being received from being erased due to a decrease in the remaining capacity of the supply means.

In the first aspect, the third control unit stores the reception information in the fourth storage unit at a predetermined cycle when the remaining capacity specified by the capacity specifying unit is a predetermined amount or less. May be. As a result, the display device can periodically store the received reception information in the nonvolatile storage means.

Further, in the first aspect, the display device is connected to the display device and the main device by second determination means for determining whether the display device and the main device are connected, and the second determination means. And a fourth transmission unit configured to transmit the first identification information and the reception information to the main device. When the display device and the main device are connected, the display device can transmit the stored first identification information and reception information to the main device. By performing communication via the connection portion between the display device and the main device, the display device can reliably transmit the first identification information and the reception information to the main device.

The display method according to the second aspect of the present invention is a display method executed by a display device having a display unit for displaying an image and a main device for managing the image, wherein the display device is operated by a user. A correspondence table in which the reception step for receiving the input of information, the display device associates the first identification information for identifying the image and the second identification information for identifying the reception information received by the reception step, A first control step for storing the received information in the first storage means, the first identification information stored in the correspondence table stored in the first control step, and the first identification. Whether the reception information specified by the second identification information corresponding to the information is related and transmitted to the main device is determined based on the state of the display device A first determination step of refusing, and when the display device is determined to transmit the first identification information and the reception information in the first determination step, the first identification information and the reception information are displayed in the main body. A first transmission step for transmitting to the device; a reception step for receiving the first identification information and the reception information transmitted from the display device by the main body device in the first transmission step; A second control step of storing the first identification information and the reception information received in the reception step in a second storage means.

In the display method according to the second aspect of the present invention, the second identification information for identifying the reception information input by the user via the display device is associated with the first identification information for identifying the image displayed on the display means. A correspondence table is created. Based on the state of the display device, it is determined whether or not to transmit the first identification information and the reception information to the main device. When the necessity of transmitting the first identification information and the reception information to the main device is high, for example, when the free capacity of the storage unit of the display device is small, the display device receives the first identification information and the reception based on the correspondence table. Information can be sent to the main device. In the main device, the first identification information and the reception information can be received and stored in the storage means. Accordingly, the display system can accurately store the first identification information and the reception information in the main device. It is possible to prevent the first identification information and reception information stored in the display device from being erased.

1 is a schematic diagram showing an overview of a display system 1. FIG. 4 is a diagram showing an example of a display image displayed on the display 3 of the display device 2. FIG. 4 is a diagram showing an example of a display image displayed on the display 3 of the display device 2. FIG. 4 is a diagram showing an example of a display image displayed on the display 3 of the display device 2. FIG. 4 is a diagram showing an example of a display image displayed on the display 3 of the display device 2. FIG. 4 is a diagram showing an example of a display image displayed on the display 3 of the display device 2. FIG. 3 is a block diagram showing an electrical configuration of the display device 2. FIG. FIG. 10 shows a reproduction table 1421. It is a figure which shows the multiple correspondence table 1422. FIG. 3 is a block diagram showing an electrical configuration of main device 4. FIG. It is a figure which shows the image table 3421. FIG. 3 is a sequence diagram showing a communication sequence of the display system 1. FIG. It is a flowchart which shows a main process. It is a flowchart which shows an initial setting process. It is a flowchart which shows an image display process. It is a flowchart which shows a communication process. It is a flowchart which shows an input process. It is a flowchart which shows a connection process. It is a flowchart which shows a main process.

Hereinafter, a display system 1 according to an embodiment of the present invention will be described with reference to the drawings. These drawings are used to explain technical features that can be adopted by the present invention. The configuration of the apparatus, the flowcharts of various processes, and the like that are described are not intended to be limited to only that, but are merely illustrative examples.

The outline of the display system 1 will be described with reference to FIG. The display system 1 includes a display device 2 and a main device 4. The display device 2 includes a display 3. The display device 2 is driven by a battery. The display device 2 acquires an image to be displayed on the display 3 (hereinafter referred to as “display image”) from the main device 4 by performing communication (wireless communication, wired communication) with the main device 4. The acquired display images are displayed on the display 3 in order at a predetermined cycle. Hereinafter, such a display mode is also referred to as “slide show display”. A touch panel is provided on the surface of the display 3. The user can insert various images into the display image by touching the display 3 with the touch pen 5. Hereinafter, an image input by the user is referred to as an “inserted image”.

The main device 4 is a cradle where the display device 2 is placed upright. The main device 4 can perform wired communication with the display device 2 via the connector in a state where the display device 2 is set. The main device 4 can perform wireless communication with the display device 2 while being separated from the display device 2. The main device 4 stores a display image. The main device 4 can display an image on the display 3 of the display device 2 by transmitting the display image to the display device 2. The main device 4 can charge the battery of the display device 2 in a state where the display device 2 is set.

An example of a display mode when the user inputs an insertion image to the display device 2 will be described with reference to FIGS. 2 to 6, a display image is displayed on the display 3. As shown in FIG. 2, the user causes the touch pen 5 to touch the display 3 while the display image is displayed on the display 3. The display 3 displays menus “edit” and “end” that can be executed by the user. It is assumed that “edit” is selected by the user. As shown in FIG. 3, “handwriting”, “plurality”, “save”, “enlarge”, “move”, and “invert” are newly displayed on the display 3 as detailed menus related to “edit”. As shown in FIG. 4, the user can input the insertion image “Thank You!” In the displayed display image by selecting “handbook”. The inserted image input by the touch pen 5 can be edited by selecting a menu such as “enlarge”, “move”, “invert”, and the like. The insertion image input by the touch pen is stored in association with the displayed display image by selecting the “Save” menu.

As shown in FIG. 5, it is assumed that the “plurality” menu is selected after the insertion image “2010.2.9” is input while “handwriting” is selected. As shown in FIG. 6, the names of the display images displayed as a slide show are displayed as a list. The user can select a display image associated with the input insertion image. As a result, the user can simultaneously associate the input insertion image with a plurality of display images. The user can associate an insertion image with a display image that is not displayed on the display 3.

In the above description, the insertion image is input through handwriting using the touch panel, but the present invention is not limited to this. The display device 2 may store a predetermined image in advance and allow the user to select one. The display device 2 may associate the selected image with the display image as an insertion image. For example, when “date” or “time” is selected as the insertion image, “date information” (such as 2012.2.9) or “time information” (such as 20:30) is associated with the display image. You may do it. These inserted images may be automatically associated with a plurality of display images.

The electrical configuration of the display device 2 will be described with reference to FIG. The display device 2 includes a CPU 11, ROM 12, RAM 13, flash memory 14, battery 15, display 3, touch panel 16, RF module 17, antenna 18, communication driver 19, and connector 20.

CPU 11 controls the operation of the entire display device 2. The ROM 12 stores at least an OS and a program for operating the CPU 11. The RAM 13 temporarily stores various information used in the program. The flash memory 14 is provided with an image storage area 141 and a table storage area 142. The image storage area 141 stores the display image received from the main device 4 and the input insertion image. In the table storage area 142, a reproduction table and a plurality of correspondence tables described later are stored. The touch panel 16 is provided on the surface of the display 3. The RF module 17 is a module that modulates and demodulates data. The CPU 11 can perform wireless communication with the main device 4 via the antenna 18. The communication driver 19 is a driver element for communicating with the main device 4 via the connector 20. The connector 20 is electrically connected to the connector 38 (see FIG. 10) of the main device 4 in a state where the display device 2 is set in the main device 4. The battery 15 supplies power to each element described above. The battery 15 is charged with electric power supplied from the main device 4 via the connector 20.

With reference to FIG. 8, a reproduction table 1421, which is an example of a reproduction table stored in the table storage area 142, will be described. The reproduction table 1421 associates identification information for identifying a display image (hereinafter referred to as “first identification information”), identification information for identifying an insertion image (hereinafter referred to as “second identification information”), and flag information. Stored. The display image corresponding to the first identification information and the insertion image corresponding to the second identification information are stored in the image storage area 141.

When the display image to be displayed in the slide show is selected by the user, the first identification information of the selected display image is stored in the reproduction table 1421. When an insertion image associated with one display image is input by the user, the second identification information of the insertion image is stored in the reproduction table 1421. The flag information indicates which of the following three states the display image corresponding to the first identification information is in. (1) State stored in the image storage area 141 and already displayed on the display 3 (2) Stored in the image storage area 141 and being displayed on the display 3 or still on the display 3 State not displayed (3) State not stored in image storage area 141 (not received from main device 4) In FIG. 8, “○” is displayed when the display image is in state (1). In the state of (2), “×” is written, and in the state of (3), “−” is written.

Referring to FIG. 9, the multiple correspondence table 1422 that is an example of the multiple correspondence table stored in the table storage area 142 will be described. The multiple correspondence table 1422 stores first identification information and second identification information in association with each other. When an insertion image associated with a plurality of display images is input by the user, the first identification information and the second identification information are stored in the multiple correspondence table 1422. FIG. 9 shows that an input operation for associating the second identification information “β” of one insertion image with the first identification information “D” “E” of the display image is performed.

The electrical configuration of the main device 4 will be described with reference to FIG. The main device 4 includes a CPU 31, ROM 32, RAM 33, flash memory 34, RF module 35, antenna 36, communication driver 37, connector 38, and power supply driver 39.

The CPU 31 controls the overall operation of the main device 4. The ROM 32 stores at least a program for operating the CPU 31. The RAM 33 temporarily stores various information used in the program. The flash memory 34 is provided with an image storage area 341 and a table storage area 342. The image storage area 341 stores a display image to be displayed on the display device 2 and an insertion image received from the display device 2. The table storage area 342 stores a table to be described later. The RF module 35 is a module that modulates and demodulates data. The CPU 31 can perform wireless communication with the display device 2 via the antenna 36. The communication driver 37 is a driver element for communicating with the display device 2. The connector 38 is electrically connected to the connector 20 (see FIG. 7) of the display device 2 in a state where the display device 2 is set in the main device 4. The power supply driver 39 is a driver IC that charges the battery 15 of the display device 2 by supplying power to the connector 38.

Referring to FIG. 11, an image table 3421, which is an example of an image table stored in the table storage area 342, will be described. The image table 3421 stores first identification information, second identification information, and identification information of an image (hereinafter referred to as “additional information”) obtained by combining a display image and an insertion image in association with each other. The image corresponding to each identification information is stored and managed in another table stored in the image storage area 341.

When the display image to be displayed as a slide show is selected by the user via the display device 2, the first identification information of the selected display image is stored in the image table 3421. When the insertion image associated with the display image is input by the user via the display device 2, the second identification information of the insertion image is stored in the image table 3421. When the additional image is created based on the display image and the insertion image, the identification information of the additional image is stored in the image table 3421.

The communication sequence in the display system 1 will be described with reference to FIG. Note that communication between the display device 2 and the main device 4 in FIG. 12 is performed wirelessly. In the display device 2, a display image (A.jpg to Z.jpg) to be displayed as a slide show on the display 3 is selected by the user. The first identification information “A” to “Z” of the selected display image is stored in the reproduction table 1421. The first identification information of the selected display image is notified to the main device 4. In the main device 4, the notified first identification information is stored in the image table 3421.

In order to acquire a display image from the main device 4, an image request packet is transmitted to the main device 4. In the image request packet, as many display images as can be stored in the image storage area 141 of the flash memory 14 included in the display device 2 are requested. In FIG. 12, “10” is set as the number of requests. The main device 4 receives the image request packet (S11).

The main device 4 reads the number “10” of display images (A.jpg to J.jpg) requested from the display device 2 from the image storage area 341. The main device 4 transmits the read display image to the display device 2. The display device 2 receives the display image (S13). The display device 2 stores the received display image in the image storage area 141. The display device 2 stores “x” in the flag information corresponding to the first identification information of the received display image among the flag information of the reproduction table 1421. The display device 2 reads the display images in order at a predetermined cycle and displays them on the display 3. In this way, the display device 2 receives only the necessary display image from the main device 4 and stores it in the flash memory 14, so that the storage capacity of the flash memory 14 can be reduced.

Display image “A.jpg” is displayed on the display 3. While the display image “A.jpg” is displayed on the display 3, the insertion image α is input by the user (S15). Note that the data is stored in the RAM 13 in the middle of the insertion image α being input. The storage format of the inserted image is a stroke data format. In the stroke data format, coordinate information (x, y) of the contact portion of the touch pen 5 with respect to the touch panel 16 is arranged and stored in time series. The insertion image α is drawn on the display image A as it is.

When the input is completed, the insertion image α stored in the RAM 13 in the stroke data format is converted into a predetermined still image format (jpg). The converted insertion image “α.jpg” is stored in the image storage area 141. The stored inserted image is associated with coordinate information (x, y) indicating the position of the inserted image. The input second identification information “α” of the inserted image is stored in the reproduction table 1421. The insertion image “α.jpg” is superimposed on the display image “A.jpg”, and “a.jpg” is displayed on the display 3. Here, “overlapped... Displayed” indicates that the drawing portion of the insertion image is extracted, the other portion is made transparent, and is displayed as a layer on the display image. The position where the insertion image is displayed as a layer is determined based on coordinate information associated with the insertion image. Thereafter, the display images are switched in order at a predetermined cycle (a.jpg → B.jpg ... D.jpg). In the reproduction table 1421, “◯” is stored in the flag information corresponding to the first identification information of the display image that has been displayed.

The insertion image β is input by the user while the display image “D.jpg” is displayed on the display 3 (S17). It is assumed that the insertion image β is input by designating both the display image “D.jpg” being displayed and the display image “E.jpg” to be displayed next. The first identification information “D” and “E” of the display images “D.jpg” and “E.jpg” and the second identification information “β” of the input inserted image are stored in the multiple correspondence table 1422. After the input is completed, “β.jpg” obtained by converting the input inserted image into the still image format is stored in the image storage area 141. The insertion image “β.jpg” is superimposed on the display image “D.jpg”, and “D′ .jpg” is displayed on the display 3.

Here, it is assumed that the free space of the image storage area 141 is reduced by storing the insertion image “β.jpg” in the image storage area 141. The display device 2 associates the insertion image “α.jpg” input in S15 and stored in the image storage area 141 with identification information “A” that identifies the corresponding display image “A.jpg” Transmit to device 4. The main device 4 receives this (S19). After transmitting the insertion image “α.jpg”, the display device 2 deletes the insertion image “α.jpg” from the image storage area 141. As a result, the display device 2 secures a free space in the image storage area 141. Further, the second identification information “α” is deleted from the reproduction table 1421. Note that the insertion image “β.jpg” input in S17 is used to display the currently displayed display image “D.jpg”, and therefore is not transmitted to the main device 4 and is stored in the image storage area 141. Do not erase from.

Note that the display image that has been displayed on the display 3 may be deleted from the image storage area 141 at the end of display, or deleted from the image storage area 141 at the timing of transmitting the inserted image to the main device 4. May be.

On the other hand, in the main device 4, the second identification information “α” of the received insertion image is stored in the image table 3421. In the main device 4, the display image “A.jpg” corresponding to the received first identification information “A” is read from the image storage area 341. The read display image “A.jpg” and the received insertion image “α.jpg” are combined to create an additional image “A′.jpg”. Here, “composite” indicates that after the inserted image and the display image are converted into RAW data, an image file (jpg) in which a drawing portion is superimposed on the display image is newly created. The created additional image “A′.jpg” is stored in the image storage area 341. The created additional image identification information “A ′” is stored in the image table 3421.

In the display device 2, “E′.jpg” in which the insertion image “β.jpg” is superimposed on the display image “E.jpg” is displayed on the display 3. Subsequently, display images “G.jpg” and “H.jpg” are displayed on the display 3. At this point, the display image that can be displayed on the display 3 is little (H.jpg, I.jpg, and J.jpg). The display device 2 transmits an image request packet (number of requests: 7) to the main device 4. The main device 4 receives the image request packet (S21). The main device 4 transmits display images (K.jpg to Q.jpg) for the amount requested from the display device 2 to the display device 2. The display device 2 receives the display image (S23) and stores it in the image storage area 141. The display device 2 displays display images on the display 3 in order at a predetermined cycle. In this way, the display device 2 repeatedly displays the display image on the display 3 while receiving the display image from the main device 4.

The insertion image γ is input by the user while the display image “I.jpg” is displayed on the display 3 (S25). It is assumed that the insertion image γ is input by designating the display image “I.jpg” being displayed. The first identification information “I” of the display image “I.jpg” and the second identification information “γ” of the input inserted image are stored in the reproduction table 1421. After the input is completed, “γ.jpg” obtained by converting the input insertion image into the still image format is stored in the image storage area 141. “I.jpg” in which the insertion image “γ.jpg” is superimposed on the display image “I.jpg” is displayed on the display 3. Here, it is assumed that the free space of the image storage area 141 is reduced by storing the insertion image “γ.jpg” in the image storage area 141. The display device 2 uses the insertion image “β.jpg” input in S17 and stored in the image storage area 141 as the first identification information “D” of the corresponding display images “D.jpg” and “E.jpg”. It is transmitted to the main device 4 in association with “E”. The main device 4 receives these (S27). After transmitting the insertion image “β.jpg”, the display device 2 deletes the insertion image “β.jpg” from the image storage area 141. Also, the first identification information “D” “E” and the second identification information “β” are deleted from the multiple correspondence table 1422. Note that the insertion image “γ.jpg” is used to display the currently displayed display image “i.jpg”, and therefore is not transmitted to the main device 4 and is not deleted from the image storage area 141.

On the other hand, in the main device 4, the received second identification information “β” of the inserted image is stored in the image table 3421. In the main device 4, the display image “D.jpg” corresponding to the received first identification information “D” is read from the flash memory 34. The read display image “D.jpg” and the received insertion image “β.jpg” are combined to create an additional image “D ″ .jpg”. The created additional image “D ″ .jpg” is stored in the image storage area 341. Similarly, an additional image “E ″ .jpg” is created and stored in the image storage area 341. The additional image identification information “D ″” and “E ″” stored in the image storage area 341 are stored in the image table 3421.

Thereafter, the display images are switched in order at a predetermined cycle. It is assumed that there are only a few remaining display images that can be displayed on the display 3 among display images stored in the display device 2. The display device 2 transmits an image request packet (number of requests: 7) to the main device 4. The main device 4 receives the image request packet (S29). When all the display images (A.jpg to Z.jpg) to be transmitted to the display device 2 are transmitted to the display device 2, the main device 4 repeatedly selects the display images in order from “A.jpg” and displays the display device 2 Send to.

Here, the main device 4 transmits the additional image to the display device 2 when the identification information of the additional image newly created by the composition of the inserted image is stored in the image table 3421. At this time point, “A′.jpg”, “D ″ .jpg”, and “E ″ .jpg” are newly created as additional images, so that the main device 4 sends (Y.jpg) to the display device 2. To E ″ .jpg (including A′.jpg, D ″ .jpg, and E ″ .jpg)) are transmitted to the display device 2. The display device 2 receives the display image (S31). The received display image is displayed on the display 3. As described above, the display device 2 can transmit the input insertion image to the main device 4, so that the insertion image can be managed safely. Further, the main device 4 can create an additional image based on the insertion image received from the display device 2 and the display image stored in advance. The display device 2 can receive an additional image from the main device 4 and display it on the display 3 even when reception information is input for an image that the display device 2 does not own.

In the above description, an image request packet for requesting a plurality of display images is transmitted to the main device 4 when there are only a few remaining display images displayed on the display device 2 as a slide show. The present invention is not limited to this. The display device 2 may request new display images one by one from the main device 4 each time display of one display image is completed. In the display device 2, an additional image obtained by combining the display image and the insertion image may be created. The created additional image may be transmitted to the main device 4.

Processes (main process and connection process) executed by the CPU 11 of the display device 2 will be described with reference to FIGS. When the display device 2 is turned on and an instruction to start a slide show is input, the CPU 11 activates and executes each process. Each process is appropriately switched by the OS. As a result, the main process and the connection process are executed independently and in parallel.

The main process will be described with reference to FIGS. The CPU 11 first executes an initial setting process (S111). The CPU 11 receives a display image to be displayed as a slide show on the display 3 from the user by the initial setting process, and acquires the corresponding display image from the main device 4. As shown in FIG. 14, the CPU 11 transmits a thumbnail request packet for requesting acquisition of thumbnails of display images to the main device 4 (S131). A thumbnail response packet is returned from the main device 4 in response to the thumbnail request packet. The CPU 11 receives the thumbnail response packet (S133). The CPU 11 extracts thumbnails stored in the thumbnail response packet. The CPU 11 displays the extracted thumbnail on the display 3.

The user refers to the displayed thumbnail. The user selects a display image to be displayed as a slide show. The CPU 11 acquires first identification information corresponding to the selected display image (S135). The CPU 11 stores the acquired first identification information in the reproduction table 1421. CPU11 transmits the list | wrist of the acquired 1st identification information with respect to the main body apparatus 4 (S137). The CPU 11 specifies the number of display images requested from the main device 4 by the image request packet as follows (S139).

The CPU 11 may specify the number of display images to be requested based on the free space of the current image storage area 141. Further, the CPU 11 may specify the number of display images to be requested based on the result of subtracting the capacity of the inserted image that may be input by the user from the free capacity of the image storage area 141. Further, the CPU 11 may specify the number of display images to be requested based on the communication state between the display device 2 and the main device 4. For example, when the communication state between the display device 2 and the main device 4 is poor, there is a high possibility that the input inserted image cannot be transmitted to the main device 4. In this case, since it is necessary to store the inserted image in the image storage area 141, the CPU 11 sets a large capacity of the inserted image that may be input. On the other hand, when the communication state between the display device 2 and the main device 4 is good, it is highly possible that the input inserted image can be transmitted to the main device 4. In this case, the CPU 11 sets the capacity of the inserted image that may be input to be small. Then, the CPU 11 may specify the number of display images to be requested based on the result of subtracting the set capacity from the free capacity of the image storage area 141. Accordingly, the display device 2 can secure a storage area for storing the insertion image even when the insertion image is input by the user.

The CPU 11 transmits an image request packet to the main device in order to acquire the specified number of display images (S141). A display image is returned from the main device 4 in response to the image request packet. The CPU 11 receives the display image (S143). The CPU 11 stores the received display image in the image storage area 141. The CPU 11 associates “x” as flag information with the first identification information of the received display image in the reproduction table 1421. The CPU 11 ends the initial setting process. The process returns to the main process.

In the above description, the CPU 11 extracts the thumbnail stored in the thumbnail response packet and displays the extracted thumbnail on the display 3. The present invention is not limited to this. In the thumbnail response packet, property information (file type, file capacity, update history, etc.) of each display image may be stored in addition to the thumbnail. The CPU 11 may extract property information simultaneously with the thumbnail and display it on the display 3. This makes it easier for the user to select a desired display image. The CPU 11 can easily specify the number of display images requested from the main device 4 by referring to the file capacity of the display image. This is because the CPU 11 can easily calculate the capacity of the display image that can be stored in the image storage area 141.

In the above description, the user selects a display image while referring to the display 3 on which thumbnails are displayed. The present invention is not limited to this. The display image to be displayed in the slide show may be set in advance by the user. The CPU 11 may divide the display image into a plurality of lists and allow the user to select one of the lists. Further, the CPU 11 may prompt the user for settings related to the slide show display (display time of the display image, display effect when the display image is switched, etc.) simultaneously with the selection of the display image.

In the above description, if the CPU 11 cannot receive the thumbnail response packet even after a predetermined time has elapsed after transmitting the thumbnail request packet, the CPU 11 may perform the retry process by repeatedly transmitting the thumbnail request packet. If the display image cannot be received after a predetermined time has elapsed after transmitting the image request packet, the CPU 11 may perform the retry process by repeatedly transmitting the image request packet.

As shown in FIG. 13, after the initial setting process (S111) ends, the CPU 11 determines whether an instruction to end the slide show display has been input (S113). When an instruction to end the slide show display is input (S113: YES), the CPU 11 transmits the untransmitted insertion image to the main device 4 and then ends the main process.

When the instruction to end the slide show display is not input (S113: NO), the CPU 11 acquires the voltage of the battery 15 (S114). The CPU 11 specifies the remaining capacity of the battery 15 based on the acquired voltage of the battery 15. When the acquired voltage of the battery 15 is less than the predetermined value, or when the remaining capacity of the battery 15 is less than the predetermined value (S115: YES), the battery 15 cannot be continuously driven. The CPU 11 ends the main process. When the remaining capacity of the battery 15 is equal to or greater than a predetermined value (S115: NO), the battery 15 can be continuously driven. The CPU 11 executes processing for displaying the display image stored in the image storage area 141 on the display 3 (image display processing, see FIG. 15) (S117).

The image display processing will be described with reference to FIG. CPU11 selects the 1st identification information of the display image displayed on the display 3 next from the 1st identification information stored in the reproduction | regeneration table 1421 (refer FIG. 8) (S151). The CPU 11 selects information stored in the multiple correspondence table 1422 (see FIG. 9) in order from the top. The CPU 11 determines whether the first identification information selected in S151 is included in the first identification information of the selected column in the multiple correspondence table 1422 (S153). When the first identification information of the display image to be displayed next is included (S153: YES), the CPU 11 extracts the second identification information stored in the selected column of the multiple correspondence table 1422 (S155). . The process proceeds to S157. On the other hand, when the first identification information of the display image to be displayed next is not included in the first identification information of the selected column in the multiple correspondence table 1422 (S153: NO), the process proceeds to S157.

CPU11 judges whether the process of S153 and S155 was performed with respect to all the columns of the multiple correspondence table 1422 (S157). If a column for which the above process has not been performed remains (S157: NO), the process returns to S153. The CPU 11 selects the next column of the multiple correspondence table 1422 (see FIG. 9), and repeats the processes of S153 and S155. On the other hand, when the CPU 11 selects all the columns of the multiple correspondence table 1422 and executes the processes of S153 and S155 (S157: YES), the process proceeds to S159.

The CPU 11 determines whether the second identification information is associated with the first identification information of the display image to be displayed next on the display 3 in the reproduction table 1421 (S159). When the second identification information is associated (S159: YES), the CPU 11 extracts the corresponding second identification information (S161). The process proceeds to S163. On the other hand, when the second identification information is not associated with the first identification information of the display image to be displayed next in the reproduction table 1421 (S159: NO), the process proceeds to S163 as it is.

The CPU 11 selects an insertion image corresponding to the second identification information extracted in S155 and S161 from the insertion images stored in the image storage area 141. The CPU 11 selects a display image to be displayed next from the display images stored in the image storage area 141. The CPU 11 superimposes the selected insertion image on the selected display image. The CPU 11 displays a display image as a result of the overlapping on the display 3 (S163). The CPU 11 updates the flag information corresponding to the first identification information of the display image that has been displayed in the reproduction table 1421 from “×” to “◯” (S165). The CPU 11 ends the image display process. The process returns to the main process.

As shown in FIG. 13, after the image display process (S117) is completed, the CPU 11 determines whether an insertion image is input by the user (S119). When the insertion image has not been input (S119: NO), the CPU 11 communicates with the main device 4 to acquire a display image and transmits the insertion image as necessary (communication processing, see FIG. 16). Execute (S123).

The communication process will be described with reference to FIG. First, the CPU 11 determines whether or not the free space in the image storage area 141 is equal to or less than a predetermined value (S171). When the free space in the image storage area 141 is equal to or less than a predetermined value, the CPU 11 stores the inserted image input by the user in the image storage area 141, thereby reducing the free space, and then receiving from the main device 4. It is determined that the display image cannot be stored in the image storage area 141. In addition, when the free space of the image storage area 141 is equal to or less than a predetermined value, the CPU 11 stores the inserted image input by the user in the image storage area 141 to reduce the free space, and then receives it from the user. It is determined that the inserted image cannot be stored in the image storage area 141. When the CPU 11 determines that the free space in the image storage area 141 is equal to or less than the predetermined value (S171: YES), the CPU 11 selects the inserted image stored in the image storage area 141 as follows and transmits it to the main device 4. (S183, S185).

First, the CPU 11 refers to the reproduction table 1421. When the second identification information is stored in the column in which “◯” is stored in the flag information, the CPU 11 extracts the first identification information and the second identification information stored in the corresponding column. The CPU 11 selects an insertion image corresponding to the extracted second identification information from the image storage area 141. The CPU 11 associates the extracted first identification information with the selected insertion image. The CPU 11 transmits an insertion image associated with the first identification information to the main device 4 (S183). Accordingly, the first identification information and the insertion image are transmitted to the main device 4 in a state where the first identification information and the insertion image are associated with each other on a one-to-one basis.

Next, the CPU 11 refers to the multiple correspondence table 1422. The CPU 11 extracts the first identification information stored in the multiple correspondence table 1422. The CPU 11 determines whether the display image corresponding to the extracted first identification information has already been displayed on the display 3 based on the reproduction table 1421. If already displayed on the display 3, the CPU 11 extracts second identification information in the same row as the corresponding first identification information from the multiple correspondence table 1422. The CPU 11 selects an insertion image corresponding to the extracted second identification information from the image storage area 141. The CPU 11 associates the extracted first identification information with the selected insertion image. The CPU 11 transmits an insertion image associated with the first identification information to the main device 4 (S185). As a result, the display device 2 can associate a plurality of pieces of first identification information with one inserted image and transmit it to the main device 4. The display device 2 can suppress the data amount at the time of transmission as compared with the case where the first identification information and the inserted image are associated with each other on a one-to-one basis and transmitted to the main device 4.

If the display image corresponding to the extracted first identification information is not yet displayed on the display 3 or is being displayed on the display 3, the CPU 11 does not transmit the insertion image to the main device 4, and the image storage area 141 need to be stored continuously. This is because an insertion image is required when the display image is displayed on the display 3.

After transmitting the first identification information and the insertion image, the CPU 11 monitors reception of an ACK returned from the main device 4 (S189). ACK is a packet transmitted from the main device 4 in order to notify the display device 2 when the main device 4 has successfully received the information transmitted from the display device 2. If ACK cannot be received even after the predetermined time has elapsed (S189: NO), the process returns to S183. The CPU 11 repeatedly transmits the first identification information and the inserted image to the main device 4. When the ACK returned from the main device 4 is received (S189: YES), the CPU 11 deletes the transmitted inserted image from the image storage area 141 (S191). The CPU 11 deletes the transmitted second identification information of the inserted image from the reproduction table 1421 and the multiple correspondence table 1422. The process proceeds to S193. As described above, the display device 2 eliminates the lack of free space in the image storage area 141 by deleting the insertion image from the image storage area 141 after transmitting the insertion image to the main device 4. The display device 2 prevents a state in which the input insertion image or the display image received from the main device 4 cannot be stored in the image storage area 141.

On the other hand, when it is determined that the free capacity of the image storage area 141 is larger than the predetermined value (S171: NO), the CPU 11 acquires the communication state with the main device 4 (S172). The CPU 11 acquires the communication state by measuring the received electric field strength of the beacon transmitted from the main device 4. When it is determined that the received electric field strength is low and the communication state with the main device 4 is poor (S173: NO), the process proceeds to S193. When it is determined that the received electric field strength is high and the communication state with the main device 4 is good (S173: YES), the CPU 11 transmits the inserted image stored in the image storage area 141 to the main device 4 (S175). , S177). Based on the same determination as in S183, the CPU 11 associates the first identification information with the inserted image and transmits the first identification information to the main device 4 (S175). Based on the same determination as in S185, the CPU 11 associates a plurality of pieces of first identification information with the inserted image and transmits them to the main device 4 (S177). As described above, the display device 2 can transmit the first identification information and the insertion image to the main device 4 when the communication state with the main device 4 is good. The display device 2 can reliably transmit the first identification information and the inserted image to the main device 4.

After transmitting the first identification information and the insertion image, the CPU 11 monitors reception of an ACK returned from the main device 4 (S179). If ACK cannot be received even after a predetermined time has elapsed (S179: NO), the process returns to S175. The first identification information and the inserted image are repeatedly transmitted. When the ACK returned by the main device 4 is received (S179: YES), the CPU 11 deletes the transmitted inserted image from the image storage area 141 (S181). The transmitted second identification information of the inserted image is deleted from the reproduction table 1421 and the multiple correspondence table 1422. The process proceeds to S193.

The CPU 11 determines whether the number of display images not yet displayed on the display 3 among the display images stored in the image storage area 141 is equal to or less than a predetermined number (eg, “3”) (S193). In the reproduction table 1421, the total of the first identification information stored in the column having the flag information “x” corresponds to the number of display images that are not yet displayed. When the number of display images that are not displayed is larger than the predetermined number (S193: NO), the CPU 11 ends the communication process. The process returns to the main process (see FIG. 13). In the main process, after the communication process (S123) ends, the process returns to S113.

As shown in FIG. 16, when the number of display images not displayed is less than a predetermined number (S193: YES), it is necessary to newly receive display images from the main device 4. The CPU 11 deletes the display image that has already been displayed on the display 3 from the image storage area 141 (S194). In the reproduction table 1421, the flag information corresponding to the first identification information of the deleted display image is changed from “◯” to “−”. The CPU 11 specifies the number of display images that can be stored in the image storage area 141. The CPU 11 transmits an image request packet for requesting the specified number of display images to the main device 4 (S195). The CPU 11 receives a display image returned from the main device 4 in response to the image request packet (S197). The CPU 11 stores the received display image in the image storage area 141. The CPU 11 associates “x” as flag information with the first identification information of the received display image in the reproduction table 1421. The CPU 11 ends the communication process. The process returns to the main process (see FIG. 13). As shown in FIG. 13, in the main process, after the communication process (S123) ends, the process returns to S113.

On the other hand, when the input of the inserted image is started by the user (S119: YES), the CPU 11 sequentially stores the inserted image being input in the RAM 13. The CPU 11 executes an input image input process (see FIG. 17) (S121). The input process will be described with reference to FIG. CPU11 acquires the voltage of the battery 15 (S200). CPU11 judges whether the remaining capacity of the battery 15 is below a predetermined value based on the voltage of the battery 15 (S201). If the remaining capacity of the battery 15 is greater than the predetermined value (S201: NO), the process proceeds to S209.

When the remaining capacity of the battery 15 is equal to or less than the predetermined value (S201: YES), the CPU 11 determines whether a predetermined period has elapsed (S203). If the predetermined period has not elapsed (S203: NO), the process proceeds to S209. When the predetermined period has elapsed (S203: YES), the CPU 11 reads the inserted image in the middle of input from the RAM 13 and stores it in the flash memory 14 together with the first identification information (S205). The process proceeds to S209. As described above, when the remaining capacity of the battery 15 is reduced while the insertion image is being input, the display device 2 can store the insertion image being input in the flash memory 14. The display device 2 can prevent the inserted image in the middle of input from being erased due to a decrease in the capacity of the battery 15. Further, the display device 2 can periodically read an inserted image in the middle of input from the RAM 13 and store it in the flash memory 14.

The CPU 11 determines whether an insertion image is input for one display image, or whether a plurality of display images are selected and an insertion image is input (S209). When an insertion image is input for one display image (S209: NO), the second identification information of the insertion image is stored in the reproduction table 1421 (S210). The CPU 11 stores the second identification information in association with the first identification information of the display image to be inserted. The process proceeds to S213. When an inserted image is input for a plurality of display images (S209: YES), the second identification information of the inserted image is stored in the multiple correspondence table 1422 (S211). The CPU 11 stores the first identification information and the second identification information of the target display image in the multiple correspondence table 1422 in association with each other. The process proceeds to S213. As described above, even when the insertion image is associated with a plurality of display images, the display device 2 associates the first identification information for identifying each display image with the second identification information, and the plurality of correspondence tables. 1422 can be created.

The CPU 11 determines whether or not the operation for inputting the inserted image has been completed (S213). When the user continues to perform the input operation (S213: NO), the process returns to S200. When the input operation of the inserted image is completed (S213: YES), the inserted image is stored in the flash memory 14 (S219), and the process returns to the main process. In the main process (see FIG. 13), after the input process (S121) ends, the process proceeds to S123.

The connection process will be described with reference to FIG. The connection process is a process executed when the display device 2 is set in the main device 4 after a slide show is displayed on the display device 2, for example. The CPU 11 detects the electrical state of the connector 20 (S270). Based on the detected electrical state, the CPU 11 determines whether the display device 2 is set in the main device 4 and both are connected (S271). If it is determined that the display device 2 and the main device 4 are not connected (S271: NO), the process returns to S270.

When it is determined that the display device 2 and the main device 4 are connected (S271: YES), the CPU 11 determines whether an insertion image is stored in the image storage area 141 (S273). The CPU 11 determines whether the inserted image that has not been transmitted to the main device 4 is stored in the image storage area 141 by determining whether the second identification information is stored in the reproduction table 1421 and the multiple correspondence table 1422. . If an inserted image that has not been transmitted to the main device 4 is not stored in the image storage area 141 (S273: NO), the process returns to S270. When the insertion image is stored in the image storage area 141 (S273: YES), the CPU 11 associates the first identification information with the insertion image stored in the image storage area 141, and transmits the first identification information to the main device 4. (S275, S277). Based on the same determination as in S183, the CPU 11 transmits an insertion image associated with the first identification information to the main device 4 (S275). Based on the same determination as in S185, the CPU 11 transmits an insertion image in which a plurality of pieces of first identification information are associated to the main device 4 (S277).

After transmitting the first identification information and the insertion image, the CPU 11 monitors reception of an ACK returned from the main device 4 (S279). If ACK cannot be received after a predetermined time has elapsed (S279: NO), the process returns to S275. The CPU 11 repeatedly transmits the first identification information and the inserted image to the main device 4. When the ACK returned from the main device 4 is received (S279: YES), the CPU 11 deletes the transmitted inserted image from the image storage area 141 (S281). The CPU 11 deletes the transmitted second identification information of the inserted image from the reproduction table 1421 and the multiple correspondence table 1422. The process returns to S273.

As described above, when the display device 2 and the main device 4 are connected, the display device 2 can transmit the stored first identification information and the inserted image to the main device 4. By performing communication via the connection part (connectors 20 and 38) between the display device 2 and the main device 4, the display device 2 reliably transmits the first identification information and the inserted image to the main device 4. The first identification information and the inserted image can be stored in the device 4. Even if the communication state is poor and communication is not possible in a state where the display device 2 and the main device 4 are separated from each other, the display device 2 and the main device 4 can communicate with each other through the connection portion. Communication can be performed reliably. The main device 4 has a function of charging the battery 15 of the display device 2, and the display device 2 is periodically set in the main device 4. Accordingly, the display device 2 can frequently transmit the inserted image to the main device 4. Thereby, the inserted image can be managed safely.

Referring to FIG. 19, the main processing executed by the CPU 31 of the main device 4 will be described. When the power of the main device 4 is turned on, the CPU 31 starts the main process. The CPU 31 determines whether any data is received from the display device 2 (S231). If the CPU 31 has not received any data from the display device 2 (S231: NO), the process returns to S231. When any data is received from the display device 2 (S231: YES), the CPU 31 determines whether a thumbnail request packet has been received (S233). When the thumbnail request packet is received (S233: YES), the CPU 31 returns an ACK to the display device 2. The CPU 31 refers to the display image stored in the image storage area 341. The CPU 31 creates a thumbnail based on the stored display image. The CPU 31 stores the created thumbnail in a thumbnail response packet. The CPU 31 transmits a thumbnail response packet to the display device 2 (S235). The process returns to S231.

When the thumbnail request packet has not been received (S233: NO), the CPU 31 determines whether a list of first identification information has been received from the display device 2 (S237). When the list of the first identification information is received from the display device 2 (S237: YES), the CPU 31 returns an ACK to the display device 2. The CPU 31 stores the received list of first identification information in the image table 3421 (S239). The process returns to S231.

If the list of first identification information has not been received from the display device 2 (S237: NO), the CPU 31 determines whether an image request packet has been received from the display device 2 (S241). When the image request packet is received from the display device 2 (S241: YES), the CPU 31 returns an ACK to the display device 2. The CPU 31 selects from the image table 3421 the first identification information of the display image to be transmitted to the display device 2. The CPU 31 refers to the first identification information stored in the image table 3421 in order, thereby extracting the number of first identification information requested in the image request packet. The CPU 11 selects a display image corresponding to the extracted first identification information from the image storage area 341. Here, when the identification information corresponding to the additional image is stored in the image table 3421, the CPU 31 selects the additional image from the image storage area 341. The CPU 31 transmits the selected image to the display device 2 (S243). Accordingly, the display device 2 can receive an image from the main device 4 and display it on the display 3. The main device 4 can transmit the additional image to the display device 2 when the additional image is stored. The display device 2 can receive the additional image transmitted from the main device 4 and display it on the display 3. The process returns to S231.

When the image request packet has not been received from the display device 2 (S241: NO), the CPU 31 determines whether the insertion image and the first identification information have been received (S245). The inserted image and the first identification information may be transmitted from the display device 2 via wireless or may be transmitted from the display device 2 via a connection portion with the display device 2. When the inserted image and the first identification information are received (S245: YES), the CPU 31 returns an ACK to the display device 2. The CPU 31 stores the second identification information of the received insertion image in the image table 3421 in association with the received first identification information (S247). The CPU 31 stores the received insertion image in the image storage area 341. The CPU 31 selects a display image corresponding to the received first identification information from the image storage area 341. The CPU 31 creates an additional image by synthesizing the selected display image and the received insertion image (S249). For example, when a plurality of first identification information is associated with the insertion image, the CPU 31 selects a plurality of display images. The CPU 31 synthesizes each of the selected display images and the received insertion image to create a plurality of additional images. As described above, the main device 4 selects and inserts the display image corresponding to the first identification information from the image storage area 341 even when the plurality of first identification information is associated with one insertion image. Multiple images can be created by adding images.

The CPU 31 stores the created additional image in the image storage area 341. The CPU 31 stores the identification information of the created additional image in the image table 3421 (S251). The CPU 31 determines whether any unprocessed inserted images remain among the received inserted images (S253). If an unprocessed insertion image remains (S253: YES), the process returns to S249 in order to create an additional image by combining the unprocessed insertion image and the display image. When an additional image is created based on all received inserted images (S253: NO), the process returns to S231. When data other than the above is received (S245: NO), the process returns to S231.

In the above description, it is assumed that the thumbnail request packet, the first identification information list, and the image request packet are transmitted from the display device 2 via radio and received by the main device 4. The present invention is not limited to these. The display device 2 may transmit each piece of information described above to the main device 4 via a connection portion with the main device 4. In the main device 4, each process shown in FIG. 19 may be executed when each piece of information described above is received via the connection portion.

As described above, the display device 2 can transmit the first identification information and the insertion image to the main device 4 when it is highly necessary to transmit the first identification information and the insertion image to the main device 4. In the main device 4, the first identification information and the inserted image can be received and stored in the flash memory 34. Therefore, the display system 1 can securely store and manage the first identification information and the inserted image. It is possible to prevent the first identification information and the inserted image stored in the display device 2 from being erased.

Also, the main device 4 can create an additional image by synthesizing the inserted image and the display image received via the display device 2. The main device 4 can appropriately create an additional image in which the insertion image is added to the display image. The display system 1 can create an additional image even when an insertion image is input to a display image not owned by the display device 2. Since the display device 2 does not need to store all the images, the storage capacity of the flash memory 14 that must be mounted on the display device 2 can be reduced. Further, the main device 4 can transmit the additional image to the display device 2. The display device 2 can receive the additional image and display it on the display 3. The user can continuously view the additional image to which the insertion image is added by inputting the insertion image.

In addition, this invention is not limited to the said embodiment, A various change is possible. In the above description, when the additional image has been created, the main device 4 transmits the additional image to the display device 2 instead of the display image before the composition. The present invention is not limited to this. The main device 4 may transmit the display image and the insertion image to the display device 2 in the process of S243 (FIG. 19). The display device 2 may display the inserted image on the received display image on the display 3. As a result, the display device 2 can acquire the insertion image and the display image separately, so that the user can perform editing by processing only the insertion image again (enlargement, reduction, movement, etc.).

In the above description, the inserted image input by the user is stored in the display device 2 and the main device 4 in a still image format. The present invention is not limited to this. The inserted image may be stored in the display device 2 and the main device 4 in the stroke data format. As a result, when the drawing amount with the touch pen 5 is small, the data capacity can be reduced as compared with the still image format. It may also be possible to select whether to store in a still image format or a stroke data format. As a result, the inserted image can be stored in a format with a smaller data capacity.

For example, it may be stored in the RAM 13 in the stroke data format in the middle of inputting the insertion image, and may be converted into the still image format as necessary in the step of storing the insertion image in the flash memory 14. For example, when information in the middle of input is stored in the flash memory 14 due to a decrease in the remaining capacity of the battery 15 (S205, see FIG. 17), the data capacity to be stored can be reduced as much as possible. Can store input information.

In addition, when the inserted image is communicated between the display device 2 and the main device 4, either the still image format or the stroke data format may be selected. For example, communication may be performed by selecting a format having a smaller data capacity, or a format that requires less power consumption during communication may be selected.

When the display image is transmitted from the main device 4 to the display device 2, whether the additional image is transmitted to the display device 2 or whether the display image and the insertion image are transmitted separately to the display device 2. You may make it selectable. As the format of the inserted image, a still image format or a stroke data format may be appropriately selected. For example, a format with a smaller data capacity may be selected.

When a plurality of pieces of input information are input to the same display image, either a still image format or a stroke data format may be selected according to the number of inputs. For example, the stroke data format may be selected when the number of inputs is small, and the still image format may be selected when the number of inputs is large.

The display device 2 may store the display image displayed at the beginning of the slide show and the display image highly likely to be selected by the user in the image storage area 141 of the flash memory 14 in advance. As a result, the display device 2 can reduce the time required until the display image is displayed in the initial stage of the slide show. The display device 2 can quickly start a slide show. Furthermore, since communication with the main device 4 can be suppressed, power consumption can be suppressed.

In the above description, the display device 2 receives the thumbnail by performing wireless communication with the main device 4, but the present invention is not limited to this. In a state where the display device 2 is set in the main device 4, the display device 2 may receive a thumbnail from the main device 4 via the connection portion. When the thumbnail is already stored, the display device 2 may receive the thumbnail from the main device 4 only when the thumbnail stored in the main device 4 is newly updated.

The display device 2 may receive a display image from the main device 4 through the connection portion while being set in the main device 4. As a result, the display device 2 can perform a slide show display in a state of being set in the main device 4. Moreover, since the display apparatus 2 can communicate via the connection part between the main body apparatuses 4, compared with the time of a wireless communication, it can communicate reliably at high speed. Accordingly, the display device 2 may store a minimum display image. This is because the display device 2 can receive the display image from the main device 4 at high speed and reliably when the display image is required. Further, the display device 2 normally operates in the power saving mode, and may be activated only when a display image is necessary. The display device 2 can request a display image from the main device 4 at the time of activation, and can acquire the display image. Thereby, the power consumption of the display device 2 can be suppressed.

In the above description, a display image or the like is stored in the flash memory 34 of the main device 4. The display device 2 receives a display image or the like from the main device 4 by wireless communication and executes a slide show display. The present invention is not limited to this. For example, the display device 2 and the main device 4 may include a memory card slot. The display image or the like may be stored in a memory card inserted in the memory card slot. The display device 2 may execute the slide show display by reading the display image stored in the memory card.

DESCRIPTION OF SYMBOLS 1 Display system 2 Display apparatus 3 Display 4

Main body apparatus

11, 31 CPU
14 Flash memory 15 Battery 34 Flash memory 131 Reproduction table 132 Multiple correspondence table 341 Image table

Claims

A display system including at least a display device including a display unit that displays an image and a main device that manages the image,
The display device
A receiving means for receiving input of information by the user;
First control means for storing a correspondence table in which the first identification information for identifying the image and the second identification information for identifying the reception information received by the reception means are associated with each other in the first storage means. When,
The main body in association with the first identification information stored in the correspondence table stored in the first control means and the reception information specified by the second identification information corresponding to the first identification information First determination means for determining whether to transmit to a device based on the state of the display device;
In the first determination means, when it is determined to transmit the first identification information and the reception information, the first determination means comprises first transmission means for transmitting the first identification information and the reception information to the main device,
The main device is
Receiving means for receiving the first identification information and the acceptance information transmitted from the display device by the first transmitting means;
A display system comprising: second control means for storing the first identification information and the reception information received by the receiving means in a second storage means.
The main device is
The image specified by the first identification information received by the receiving means is extracted from the third storage means in which the image is stored, and the reception information associated with the first identification information is The display system according to claim 1, further comprising creation means for creating an additional image by adding the extracted image.
The first determination means includes
2. The display system according to claim 1, wherein the first identification information and the reception information are determined to be transmitted when a free capacity of the first storage unit becomes a predetermined amount or less.
The display device
An acquisition means for acquiring a communication state with the main device,
The first determination means includes
The display system according to claim 1, wherein the first identification information and the reception information are determined to be transmitted when a communication state acquired by the acquisition unit satisfies a predetermined condition.
The main device is
Second transmission means for transmitting the image stored in the third storage means to the display device;
The second transmission means includes
The display system according to claim 2, wherein, when the additional image is generated by the generation unit, the additional image is transmitted to the display device instead of the image.
The first control means includes
Storing the correspondence table in which a plurality of the first identification information and one second identification information are associated with each other in the first storage unit;
The first transmission means includes
The display system according to claim 2, wherein a plurality of the first identification information and one piece of the reception information are transmitted in association with each other.
The creating means includes
When a plurality of the first identification information and one reception information are associated with each other, one reception information is added to the image specified by each of the first identification information The display system according to claim 6, wherein a plurality of the additional images are created.
The main device is
The image specified by the first identification information received by the receiving unit is extracted from the third storage unit in which the image is stored, and is displayed on the display device together with the reception information received by the receiving unit. The display system according to claim 1, further comprising third transmission means for transmitting.
The display device
Supply means for supplying power for driving the display device;
Capacity specifying means for specifying the remaining capacity of the supply means,
When the remaining capacity specified by the capacity specifying means is a predetermined amount or less, a third control means is provided for storing the acceptance information in a state accepted by the acceptance means in a nonvolatile fourth storage means. The display system according to claim 1.
The third control means includes
10. The display system according to claim 9, wherein when the remaining capacity specified by the capacity specifying unit is equal to or less than a predetermined amount, the reception information is stored in the fourth storage unit at a predetermined cycle.
The display device
Second determination means for determining whether the display device and the main device are connected;
Fourth transmission means for transmitting the first identification information and the reception information to the main device when the second determination device determines that the display device and the main device are connected. The display system according to claim 1.
A display method executed in a display device including a display unit that displays an image and a main device that manages the image,
The display device accepting input of information by a user;
The display device stores a correspondence table in which the first identification information for identifying the image and the second identification information for identifying the reception information received in the reception step are associated with each other in the first storage unit together with the reception information. A first control step to
The reception information specified by the first identification information stored in the correspondence table stored in the first control step and the second identification information corresponding to the first identification information. A first determination step of determining whether or not to transmit to the main device based on the state of the display device;
A first transmission step of transmitting the first identification information and the reception information to the main device when the display device is determined to transmit the first identification information and the reception information in the first determination step. When,
The main device receives the first identification information and the reception information transmitted from the display device in the first transmission step;
A display method, wherein the main device includes a second control step of storing the first identification information and the reception information received in the reception step in a second storage unit.