JP2006259803A - Information display device, and information display system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily store drawing data of display target contents, in an information display device. <P>SOLUTION: A document selection menu is displayed for requiring selection of document data stored in at least one of a server 2 or the information display device 3; and if the document data selected in the document selection menu is not stored in the information display device 3 and stored only in the server 2, signal is produced such that the document data are stored in the server 2. By this, in addition to document data of contents stored in the information display device 3, document data that are not stored in the information display device 3 can be selected also; and if document data which are not stored are selected, signaling can be carried out that it is stored in the server 2. For this, by having the information display device 3 acquire the document data, in accordance with the signaling, the selected document data can be stored easily in the information display device 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an information display device that displays drawing data of content such as business documents, newspapers, magazines, and textbooks, and an information display system using the information display device.

  Conventionally, in this type of information display device, a display body with high resolution is used in order to improve the visibility of characters and the like included in content. For this reason, the drawing data increases, and the method of simply storing the document data of the content to be displayed in the memory of the information display device (document data storage memory) may cause a shortage of the remaining amount of the memory. is there.

For example, as a technique for preventing a shortage of remaining memory for data storage, there is a digital broadcast receiving apparatus that sequentially deletes data with low usage frequency (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 2003-9068

  By the way, in an information display device that combines the above-described conventional techniques (in an information display device that sequentially deletes data that is used infrequently), drawing data of content to be displayed is erased from the information display device. If this happens, the drawing data is stored again. Therefore, when drawing data is stored again, the storage location of the drawing data has to be searched, and as a result, there is a possibility that it takes a lot of time to search the storage location.

  The present invention has been made for the purpose of solving the problems of the above-described conventional technology, and is an information display device that can easily store drawing data of content to be displayed in the information display device, and the information display. It is an object of the present invention to provide an information display system using an apparatus.

  In order to solve the above-described problems, an information display device of the present invention is an information display device that displays drawing data of content stored in its own device, and is provided in at least one of its own device and storage means other than its own device. Selection means for selecting stored drawing data; if the selected drawing data is stored in the own device, the selected drawing data is displayed; if the selected drawing data is not stored in the own device And display means for notifying information relating to the storage means in which the selected drawing data is stored.

In addition, a first storage unit that stores thumbnails and meta information of the drawing data is provided, and the selection unit selects the drawing data based on the thumbnails and the meta information stored in the first storage unit. The selected image to be displayed may be displayed.
And a second storage unit that stores information relating to the storage unit in which the drawing data is stored. The display unit is configured to make the selection based on the information stored in the second storage unit. It is determined whether or not the drawing data is stored in the storage unit of the own device. If it is determined that the drawing data is stored in the storage unit of the own device, the selected drawing data is displayed, and the own device is displayed. If it is determined that the data is stored in other storage means, information on the storage means in which the selected drawing data is stored may be notified.

  According to such a configuration, in addition to the drawing data of the content stored in the own device, it is possible to select drawing data not stored in the own device, and the non-stored drawing data is selected. In the case of a failure, the storage means in which the drawing data is stored can be notified. Therefore, the selected drawing data can be easily stored in the information display device by causing the information display device to acquire the drawing data according to the notification.

  On the other hand, an information display system according to the present invention comprises an information display comprising: a server that stores drawing data of all contents; and the information display device according to any one of claims 1 to 3 that stores the drawing data. In the system, the information display device selects whether or not to acquire the drawing data when the selected drawing data is not stored in the storage unit of the device, and acquires the drawing data. Is selected, the information indicating the acquisition of the selected drawing data is transmitted to the server, and the server reads the drawing data indicated by the information transmitted from the information display device, and the information display device It is characterized by transmitting to.

  According to such a configuration, when drawing data that is not stored in the information display device is selected, the drawing data can be transmitted to the server by selecting to obtain the drawing data. The drawing data can be easily stored in the information display device.

Hereinafter, an embodiment of an information display system to which an information display device according to the present invention is applied will be described with reference to the drawings.
In this information display system, when document data of content to be displayed is generated and stored by a server, the stored document data and a document management table including information about the document data in an entry are displayed as information. Send to device.

  The information display system receives document data and a document management table transmitted from the server by the information display device and stores them in the storage. At this time, when there is no free space for storing the document data, the document data with a low reference count is deleted from the document data stored in the storage to form the free space. When the document data in the storage is selected as the display target content, the document data is read and displayed on the display panel. In addition, when document data deleted due to the free space is selected as the display target content, a flag indicating reception from the server at the next connection (synchronization) with the server is displayed in the document management table. Set in the document data entry.

  Then, when the server and the information display device are connected (synchronized), the information display system detects the entry with the flag set from the document management table, and the document data corresponding to the entry Is transmitted from the server to the information display device.

<Configuration of information display system>
FIG. 1 is a perspective view showing an appearance of an information display system 1 to which the present invention is applied. As shown in FIG. 1, the information display system 1 stores a server 2 that generates and transmits document data of content to be displayed, and stores the transmitted document data, and the document data (content) is selected. Then, the information display device 3 is configured to display the selected document data.

<Server configuration>
As shown in FIG. 2, the server 2 includes a CPU (Central Processing Unit) 10, a storage 20, a RAM (Random Access Memory) 30, a display 40, an input control unit 50, an input device 50 a, and a data interface (hereinafter “data I”). / F (Inter Face) "). In this embodiment, since the operation of transmitting and storing document data to the information display device 3 is performed using the function of the printer driver of the server 2, this operation is also referred to as “printing”.

In accordance with various instruction signals input from the input control unit 50, the CPU 10 reads and executes programs related to various processes and data related to the programs stored in the storage 20, and controls the entire server 2. Then, the CPU 10 stores the processing results of the executed various processes in the RAM 30.
The storage 20 is configured by a nonvolatile memory. The storage 20 stores various programs and data for controlling each unit of the information display device 3. Further, the storage 20 sequentially stores data input from the data I / F 60.

When the CPU 10 executes various processes, the RAM 30 forms a work area and stores the processing results of these various processes.
The display 40 displays processing results obtained by various processes executed by the CPU 10.
The input control unit 50 has an interface function for controlling signal input from the input device 50 a to the CPU 10. And the input control part 50 receives the input signal which the input apparatus 50a generate | occur | produces, performs a predetermined process, and outputs the process result to CPU10.

The input device 50a is configured by an input device such as a keyboard and a mouse. The input device 50a can accept an instruction input from the user.
The data I / F 60 is an interface for transmitting / receiving data to / from the information display device 3. The data I / F 60 receives document data from the information display device 3 and a document management table (hereinafter also referred to as “client document management table TBL1”) including an entry based on information related to the document data. The transmitted document data and the client document management table TBL1 are stored in the storage 20.

  Here, as shown in FIG. 3A, the document data includes document metadata (file name, title, number of thumbnails, document direction, number of pages), thumbnail block information, page block information, band information, and thumbnail images. Data and page image data are included. As shown in FIG. 3B, the thumbnail block information includes an ID, an offset to data, and a data size.

  As shown in FIG. 4, the client document management table TBL1 includes an ID field, a file path field, a file name field, a body field, a reference number field, a link destination field, a size field, a meta information field, and a head thumbnail field. It is comprised including. The ID field uses the ID number of document data (hereinafter also referred to as “corresponding document data”) corresponding to each entry as a field value, and the file path field indicates the file path of the area in which the corresponding document data is stored. Value. The body field has a flag indicating whether or not the corresponding document data is stored in the storage 210 as a field value. When the flag is stored, the field value is “present”. The value is “None”. Further, the reference number field uses the number of times corresponding document data is displayed on the information display device 3 as a field value, and the link destination field uses a file path in the server 2 where the corresponding document data is stored as a field value. Furthermore, the size field uses the file size of the corresponding document data as the field value, the meta information field uses the meta information (eg, title, publisher name, number of pages) of the corresponding document as the field value, and the top thumbnail field corresponds to The thumbnail of the document is used as the field value. Note that the field values of the meta information field and the head thumbnail field are “NULL” when the field value of the main field is “present”.

<Functional part of server>
The print data transmission processing unit 100 and the data synchronization unit 110 are functional units realized by the CPU 10.

  When there is a print start request from the user, the print data transmission processing unit 100 generates document data and stores it in the storage 20, adds an entry for information related to the document data, and adds a document management table (hereinafter “server use”). Document management table TBL2 "). Then, based on the server document management table TBL2, a client document management table TBL1 to which an entry of information related to the document data is added is generated, and the client document management table TBL1 and the document data are stored in the information display device. A print data transmission process is executed to transmit and update the document management table TBL1.

Here, as shown in FIG. 5, the server document management table TBL2 includes an ID field, a file name field, a body field, a link destination field, a size field, a meta information field, and a head thumbnail field. That is, the file path field and the reference number field of the client table TBL1 are omitted.
When the server 2 and the information display device 3 are connected, the data synchronization unit 10 detects an entry whose field value of the body field is “synchronized” from the client document management table TBL1 of the information display device 3, and detects the detection. A synchronization data transmission process for transmitting the document data corresponding to the entered entry from the storage 20 of the server 2 to the information display device 3 is executed.

<Configuration of information display device>
On the other hand, as shown in FIG. 6, the information display device 3 includes a data I / F 200, a storage 210, a CPU 220, a program storage unit 230, an NVRAM 240, a graphic accelerator 250, a display driving unit 260, a display panel 260a, an input control unit 270, An HI (Human Interface) device 270a and a power source 280 are included.

The data I / F 200 is an interface for transmitting and receiving data between the server 2 and the information display device 3, and is configured by, for example, a communication interface. When the document data and the document management table are transmitted from the server 2, the data I / F 200 stores the document data and the document management table in the storage 210.
The storage 210 is configured by a removable memory card that can be inserted and removed. The storage 210 stores data input from the data I / F 200.

  In accordance with various instruction signals input from the input control unit 270, the CPU 220 reads out and executes programs related to various processes and data related to the programs stored in the program storage unit 230, and controls the entire information display device 3. Then, the CPU 220 performs various processes for drawing and displaying the content stored in the program storage unit 230 on the display panel 260 a, and stores the processing results in the NVRAM 240.

The program storage unit 230 is configured by a nonvolatile memory. The program storage unit 230 stores various programs for controlling each unit of the information display device 3.
The NVRAM 240 is a non-volatile memory (a memory that maintains retained data even when the power is turned off) such as a FRAM (Ferroelectric Random Access Memory), an MRAM (Magnetoresistive Random Access Memory), and an nvSRAM (non-volatile Static Random Access Memory). Composed. The NVRAM 240 forms a work area and stores the processing result when the CPU 220 executes the process.

  The graphic accelerator 250 is hardware for performing a drawing process of an image displayed on the display panel 260a at high speed in accordance with a command from the CPU 220. Specifically, the graphic accelerator 250 develops page image data input from the CPU 220. Then, the graphic accelerator 250 outputs drawing data for drawing the graphic subjected to the drawing process on the display panel 260a to the display driving unit 260.

  The display driver 260 directly controls the display panel 260a and draws drawing data input from the graphic accelerator 250 on the display panel 260a. Specifically, the display driving unit 260 includes a pixel writing unit 261 to which drawing data is input by the graphic accelerator 250. Then, the display driving unit 260 refers to the drawing data input to the pixel writing unit 261 and drives the X driver and Y driver of the display panel 260a to draw the input drawing data on the display panel 260a. To do.

  In addition, the display panel 260a includes an A4-sized high pixel density (multi-pixel) memory display device (a display device that maintains a display screen even when the power is turned off). The display panel 260a displays pixel data on a predetermined pixel in accordance with the control of the display driving unit 260. For example, an electrophoretic display, a cholesteric liquid crystal display, or an electrodeposition display can be employed as the display panel 260a.

  The input control unit 270 has an interface function of controlling signal input from the HI device 270a to the CPU 220. The input control unit 270 receives an input signal generated by the HI device 270a, performs predetermined processing, and outputs the processing result to the CPU 220. Specifically, when the direction button or the determination button (described later) is pressed for 100 msec. Or more, the input control unit 270 outputs a signal for setting a flag for identifying the button to the CPU 220. Detection processing (described later) is executed by the button press detection unit 271.

The HI device 270a is configured by an input device such as a cross-shaped direction button that can indicate each of the upper, lower, left, and right directions and a button-shaped determination button that can be pressed. The HI device 270a can accept an instruction input to the information display device 3 from the user.
The power source 280 is configured by a primary battery or a secondary battery. The power supply 280 supplies power to each unit for appropriately operating each unit in the entire information display device 3.

<Functional part of information display device>
The document management unit 300, the analysis / shaping unit 310, and the drawing processing unit 320 are functional units realized by the CPU 220 and the graphic accelerator 250.

The document management unit 300 receives the document data transmitted from the server 2 and the client document management table TBL1 and stores them in the storage 210, thereby performing print data reception processing for updating the client document management table TBL1. Execute.
In addition, when the document data 2 deleted from the storage 210 is selected as the content to be displayed, the document management unit 300 displays a flag “indicating that the selected document data is received at the next connection with the server 2. A synchronization data reception process is executed in which “synchronization” is set in the main body field of the content in the client document management table TBL1.

  The analysis / formatting unit 310 separates the page image data included in the document data stored in the storage 210 into text information and style information, and sets the elements of the text information according to the style information for each display unit such as a page. Arrange and expand to a drawing element of the specified style. Specifically, when the text information element is a character string, the character code constituting the character string is converted into information indicating a font having an attribute such as a designated size font or color. When the text information element is an image (bitmap), the pixel string included in the element or the compressed drawing data is converted into a pixel string that is actually displayed.

  Further, in order to display the document data on the display panel 260 a, the analysis / formatting unit 310 expands the entire document data or a portion to be displayed first into drawing elements in advance, and stores the expanded document data in the NVRAM 240. The format of the image data generated by the analysis / shaping unit 310 is also referred to as “intermediate format”. Thus, by converting the document data into the intermediate format, the document data can be displayed on the display panel 260a at high speed.

  The drawing processing unit 320 processes intermediate format data to be displayed and generates a bitmap according to the number of pixels of the display panel 260a. That is, the drawing processing unit 320 performs a process of decomposing a figure such as a continuous straight line, a Bezier curve, or a polygon into a straight line (a process of decomposing the figure into a sum of predetermined vectors), and further, a pixel that becomes a passing point such as a straight line or an arc A series of processes for converting a vector image included in intermediate format data into a bitmap, such as calculating a position, is performed. Then, the rendering processing unit 320 outputs the bitmapped data to the display driving unit 70.

<Operation of information display system>
<When storing document data from the server to the information display device>
Next, print data transmission processing executed by the print data transmission processing unit 100 (CPU 10) of the server 2 will be described with reference to the flowchart of FIG. This print data transmission process is executed when a print start request is made by the user. As shown in FIG. 7A, first, in step S101, the client data transmitted from the information display device 3 is processed. The document management table TBL1 and the memory card ID are received. Here, the memory card ID is information indicating the ID number of the memory card inserted in the information display device 3.

In step S102, an ID number is set for the document (content, hereinafter referred to as “print document”) for which the print request has been made.
In step S103, a file name is set in the print document and document data of the print document is generated. Further, the file path of the area for storing the generated document data and the file size of the document data are detected.

In step S104, an entry (print document entry) in the server document management table TBL2 is generated and registered based on the file name, file path, and file size set in step S103.
In step S105, it is determined whether the document data generated in step S104 has a size that can be transmitted. Specifically, it is determined whether or not there is an area in the storage 20 of the information display device 3 that can store the document data. If the area is present (Yes), the process proceeds to step S113. If the area is not present (No), the process proceeds to step S106.

  In step S106, first, the field value of the size field of the entry whose field value of the reference number field is equal to or smaller than a predetermined value among the entries excluding the print document from the client document management table received in step S101 is obtained. Accumulate. Then, it is determined whether or not the integration result is larger than the file size of the print document generated in step S104. If it is larger than the file size of the print document, the process proceeds to (Yes) Step S107, and if it is smaller (No), the process proceeds to Step S112.

In step S <b> 107, a deletion start signal is transmitted to the information display device 3 to notify the start of the deletion process for causing the information display device 3 to delete the document data.
Next, the process proceeds to step S108, and the ID of the entry (document) whose field value in the reference number field is equal to or smaller than a predetermined value among the entries excluding the print document from the client document management table received in step S101. A list of numbers (hereinafter also referred to as “deletion document ID list”) is created, and the deletion document ID list is transmitted to the information display device 3.

Next, the process proceeds to step S109, and after the deletion completion signal for notifying the completion of the deletion transmitted from the information display device 3 is received from the information display device 3, the process proceeds to step S110.
In step S110, the entry included in the deletion document ID list generated in step S108 is extracted from the server document management table TBL2, and the field value of the link destination field of the extracted entry is set in the own apparatus. After executing the deletion target field value setting process, the process proceeds to step S111.

In step S111, after receiving the deletion end signal for notifying the end of the deletion process transmitted from the information display device 3, the process proceeds to step S113.
On the other hand, in step S112, a deletion non-execution signal for notifying that the deletion process is not executed is output to the information display device 3, and then the process proceeds to step S113.
In step S113, the entry registered in step S104 is extracted from the server document management table TBL2, and the field value of the link destination field of the extracted entry is set in the storage 220 of the information display device 3. After executing the value setting process, the process proceeds to step S114.

Next, the process proceeds to step S114, and first, a document management table generating process for generating the client document management table TBL1 based on the server document management table TBL2 is executed. Then, the created client document management table TBL1 is transmitted to the display device 1.
Next, the process proceeds to step S115, the document data generated in step S103 is transmitted to the information display device 3, and the calculation process is terminated.

Next, the deletion target field value setting process executed in step S110 of the print data transmission process will be described with reference to the flowchart of FIG. In this deletion target field value setting process, as shown in FIG. 8, in step S201, an entry included in the deletion document ID list generated in step S108 is extracted from the server document management table TBL2.
In step S202, the field value of the link destination field of the entry extracted in step S201 is set in the storage 20 (Server [i], i is a natural number).

  Next, the transmission target field value setting process executed in step S113 of the print data transmission process will be described with reference to the flowchart of FIG. As shown in FIG. 9, in the transmission target field value setting process, first, in step S301, the entry registered in step S104 or the entry extracted in step S902 described later is extracted from the server document management table TBL2. To do.

In step S302, the field value of the link destination field of the entry extracted in step S301 is set in the storage 220 of the information display device 3 (MemoryCard [j], j is a natural number).
Next, the document management table generation process executed in step S114 of the print data transmission process will be described with reference to the flowchart of FIG. As shown in FIG. 10, in the document management table generation process, first, in step S401, a file path field and a reference number field are added to the server document management table TBL2 stored in the storage 20, and the client TBL1 is added. And the entry in which the storage 20 of the own device is set as the field value of the link destination field is extracted from the generated client TBL1.

In step S402, the field value of the main field of the entry extracted in step S401 is set to “none”.
Next, the process proceeds to step S403, and the field value of the reference number field of all entries of the client document management table TBL1 generated in step S401 is set to “0”.

In step S404, an entry in which the storage 210 of the information display device 3 is set as the field value of the link destination field is extracted from the client document management table TBL1 generated in step S401.
In step S405, the file path of the storage 210 of the information display device 3 is set in the file path field of the entry extracted in step S404.

Next, print data reception processing executed by the document management unit 300 (CPU 220) of the information display device 3 will be described with reference to the flowchart of FIG. In this print data receiving process, as shown in FIG. 7B, first, in step S501, the client document management table TBL1 and the memory card ID are transmitted to the server 2.
In step S502, it is determined whether a deletion start signal is transmitted from the server 2. If a deletion start signal is output (Yes), the process proceeds to step S503. If a deletion non-execution signal is transmitted (No), the process proceeds to step S506.

In step S503, after receiving the deletion document ID list transmitted from the server 2, the process proceeds to step S504.
In step S504, the document data of the ID number included in the deletion document ID list received in step S503 is deleted from the storage 210 to increase the free space in the storage 210, and then a deletion completion signal is sent to the server 2. Send.

Next, the process proceeds to step S505, and after the deletion end signal transmitted from the server 2 is received, the process proceeds to step S506.
In step S506, the client document management table TBL1 transmitted from the server 2 is replaced (updated) with the client document management table TBL1 of the own apparatus, and then the process proceeds to step S507.

  In step S507, the document data transmitted from the server 2 is received, and the document data is stored in the area indicated by the field value (file path) of the file path field of the client document management table updated in step S506. Then, this calculation process is terminated.

<When document data is displayed by the information display device>
Next, a press button detection process executed by the button press detection unit 271 will be described with reference to the flowchart of FIG. This push button detection process is executed every time a predetermined time (for example, 10 msec.) Elapses or when a signal issued from the HI device 270a is received. As shown in FIG. In S601, a variable i for measuring the operation time of the direction button and the decision button (a variable indicating the number of times a loop composed of steps S602 to S605 described later) has been initialized is set to “0”. As will be described later, the loop takes 10 msec. Or more to execute once.

  Next, the process proceeds to step S602, where it is determined whether either the direction button or the determination button is pressed by the user. Specifically, it is determined whether or not a signal indicating that the direction button or the determination button is pressed is generated from the HI device 270a. If the signal is generated (Yes), the process proceeds to step S603. If the signal is not generated (No), the calculation process is terminated.

In step S603, “1” is added to the variable i.
Next, the process proceeds to step S604, and it is determined whether or not the direction button or the determination button is pressed by the user and the state where the signal is generated from the HI device 270a continues for 100 msec. Or more. Specifically, it is determined whether or not the loop composed of steps S602 to S605 has been repeatedly executed 10 times or more, that is, whether or not the variable i is greater than “10”. If the variable i is “10” or less (Yes), the process proceeds to step S606. If the variable i is greater than “10” (No), the process proceeds to step S605.

In step S605, after waiting for 10 msec., The process proceeds to step S602.
On the other hand, in step S606, based on the signal output from the HI device 270a, a signal for setting the button pressing flag corresponding to each button is output to the CPU 30 in order to identify the button being pressed by the user. Then, this calculation process is terminated.

  Next, content selection processing executed by the document management unit 300 (CPU 220) will be described with reference to the flowchart of FIG. This content selection process is executed when a display target content selection request is made. As shown in FIG. 12, first, in step S701, the client document management table TBL1 stored in the storage 210 or the like is displayed. Based on the document data, the graphic accelerator 250, the display driving unit 260, and the pixel writing unit 261 are controlled. Then, as shown in FIG. 13, a document selection menu for displaying document data (contents) stored in at least one of the storage 20 of the server 2 and / or the storage 210 of the information display device 3 is displayed on the display panel. Menu display processing to be displayed on 260a is executed. Here, in the display menu, a data group including a thumbnail image of content and document metadata (title, publisher name, number of pages, etc.) is sequentially displayed from the upper side in plan view in order of ID number. Further, in the initial state, the data group at the upper end in plan view is displayed in reverse on the display panel 260a.

  Next, the process proceeds to step S702, where it is determined whether any one of the direction button or the determination button is pressed by the user. Specifically, it is determined whether or not a flag indicating that the direction button or the determination button is pressed is set. If the flag indicating that the direction button is pressed is set (up or down), the process proceeds to step S703, and the flag indicating that the enter button is pressed is set. If (Yes), the process proceeds to step S707. If these flags are not set (No), this determination is repeated.

  In step S703, the content displayed in the direction corresponding to the set button pressing flag of the direction button is selected, and the selected content is stored in the storage 210 as display candidate content. Let In the initial state, the content displayed at the top of the document selection menu in the plan view, that is, the content with the ID number “00000001” is set as the display candidate content.

Next, the process proceeds to step S704, and it is determined whether or not the content information that is the display candidate in step S703 is not in the document selection menu. If the content information is not in the document selection menu (Yes), the process proceeds to step S705. If the content information is in the document selection menu, the process proceeds to (No) 706.
In step S <b> 705, the graphic accelerator 250, the display driving unit 260, and the pixel writing unit 261 are controlled based on the display candidate content information stored in the storage 210. Then, a document selection menu rewriting process for rewriting the document selection menu on the display panel 260a is executed so that the display candidates set in step S703 are displayed on the document selection menu, and then the process proceeds to step S702.

  In step S706, the graphic accelerator 250, the display driving unit 260, and the pixel writing unit 261 are controlled based on the display candidate content information stored in the storage 210. Then, display candidate reversal display processing for rewriting the document selection menu on the display panel 260a is executed so that the display candidates set in step S703 are reversed, and the process proceeds to step S702.

On the other hand, in step S707, based on the display candidate content information stored in the storage 210, the display candidate content is set as a display target.
Next, the process proceeds to step S708, and the entry of the content set as the display target in step S707 is extracted from the document management table stored in the storage 210.

Next, the process proceeds to step S709, and it is determined whether or not the field value of the body field of the entry extracted in step S706 is “Yes”. If it is “Yes” (Yes), the process proceeds to Step S710. If it is “No” (No), the process proceeds to Step S711.
In step S710, the graphic accelerator 250, the display driving unit 260, and the pixel writing unit 261 are controlled based on the setting result obtained in step S707. Then, after executing the normal document display process for displaying the content set as the display target in the step S707 on the display panel 260a, the calculation process is terminated.

  On the other hand, in step S711, the graphic accelerator 250, the display driving unit 260, and the pixel writing unit 261 are controlled based on the setting result in step S707. Then, at the next synchronization, a body-less information display process for selecting whether or not to acquire the document data of the content set as the display target in step S707 from the server 2 is executed, and then the calculation process is ended. .

  Next, the main body data absence information display process executed in step S711 of the text display process will be described with reference to the flowchart of FIG. As shown in FIG. 14, the main body data no-information display processing first proceeds to step S801, where the thumbnail image and document metadata of the content set as the display target in step S707 from the client document management table TBL1 are displayed. (Title, publisher name, number of pages, etc.).

In step S802, bitmap data (hereinafter also referred to as “document information bitmap”) between the thumbnail image extracted in step S801 and document metadata is generated.
In step S803, the document data entry of the content set as the display target in step S707 is extracted from the client document management table TBL1, and the field value of the link destination field of the extracted entry is extracted. To do.

In step S804, the name (server name) of the server 2 storing the display target document data is extracted from the field value extracted in step S803.
In step S805, the bitmap data indicating the name of the server 2 in which the document data of the content set as the display target in step S707 is stored based on the server name extracted in step S804. (Hereinafter also referred to as “link information bitmap”).

In step S806, bitmap data indicating a message for determining whether or not the document data of the content to be displayed is received from the server 2 at the next synchronization (hereinafter, “synchronous selection bitmap”). Also called).
In step S807, the document information bitmap generated in step S802, the link information bitmap generated in step S805, and the synchronization selection bitmap read in step S807 are combined to form a bit. Map data (hereinafter also referred to as “screen bitmap”) is generated. Then, as shown in FIG. 15, screen bitmap processing for displaying the screen bitmap on the display panel 260a is executed.

  Next, the process proceeds to step S808, and it is determined whether any one of the direction button or the determination button is pressed by the user. Specifically, it is determined whether or not a flag indicating that the direction button or the determination button is pressed is set. If the flag indicating that the direction button is pressed is set (up or down), the process proceeds to step S809, and the flag indicating that the enter button is pressed is set. If (Yes), the process proceeds to step S810. If these flags are not set (others), this determination is repeatedly executed.

In step S809, if “Yes” has been selected with the selection cursor so far, “No” is selected, and if “No” has been selected, “Yes” is selected. To step S808. In the initial state, “Yes” is selected with the selection cursor.
On the other hand, in the step S810, it is determined whether or not “Yes” is selected with the selection cursor. If “Yes” is selected (Yes), the process proceeds to step S811, and if “No” is selected (No), the process proceeds to step S812.

In step S811, the field value of the main body field of the entry of the document data of the content set in step S707 is set to “synchronization” as shown in the entry “field value of ID field“ 00000002 ”in FIG. ”And then the process proceeds to step S812.
In step S812, the menu display process is executed, and then the calculation process ends.

<When synchronizing server and information display device>
Next, synchronization data transmission processing executed by the data synchronization unit 110 (CPU 10) of the server 2 will be described with reference to the flowchart of FIG. As shown in FIG. 17A, the synchronization data transmission process includes steps S901 to S904 instead of steps S101 to S105 of the print data transmission process (see FIG. 7A). In this process, step S905 is provided instead of step S115.

Specifically, first, in step S901, the client document management table TBL1 transmitted from the information display device 3 is received.
Next, the process proceeds to step S902, and an entry in which “synchronization” is set in the field value of the synchronization field is extracted from the client document management table TBL1 received in step S901.

In step S903, it is determined whether an entry is extracted in step S902. If it is extracted (Yes), the process proceeds to step S904. If it is not extracted (No), this calculation process is terminated.
In step S904, it is determined whether the document data of the entry extracted in step S902 has a transmittable size. Specifically, it is determined whether or not there is an area in the storage 20 of the information display device 3 that can store the document data. If the area is present (Yes), the process proceeds to step S113. If the area is not present (No), the process proceeds to step S106.

On the other hand, in step S905, after the document data generated in step S903 is transmitted to the information display device 3, this calculation process is terminated.
Next, synchronization data reception processing executed by the document management unit 300 (CPU 220) of the information display device 3 will be described with reference to the flowchart of FIG. As shown in FIG. 17B, this synchronization data reception process is provided with step S1001 instead of step S501 of the printing data reception process (see FIG. 7B), and is replaced with step S507. Step S1002 is provided.

Specifically, first, in step S901, the client document management table TBL1 is transmitted to the server 2.
On the other hand, in step S1002, the document data transmitted from the server 2 is received, and the document data is indicated by the field value (file path) of the file path field of the client document management table TBL1 received in step S506. After the data is stored in the area, the calculation process is terminated.

<Specific operation of information display system>
Next, the operation of the information display system of the present embodiment will be described based on a specific situation.
<When document data is displayed by the information display device>
First, document data of a plurality of contents is generated by the server 2, and the generated document data is transmitted to the information display device 3 together with the client document management table TBL 1 to which the entry of the document data is added and stored in the storage 210. Suppose that it was memorized. Thereafter, when the user performs an operation for selecting content to be displayed on the information display device 3, a content selection process is executed by the document management unit 300 (CPU 220). First, as shown in FIG. 12, step S701 is performed. Thus, the menu display process is executed based on each entry in the client table stored in the storage 210. Then, the document data (contents) stored in the storage 20 of the server 2 or the storage 210 of the information display device 3 is displayed by the NVRAM 240, the graphic accelerator 250, the display driving unit 260, and the pixel writing unit 261 as shown in FIG. ) Is displayed on the display panel 260a.

  Here, the content displayed second from the top in the plan view of the document selection menu (content of ID number “0000002”, hereinafter also referred to as “document 2”) is user-desired content, and the content is selected. In order to do this, assume that the user presses the lower side of the direction button. Then, a signal indicating that the direction instruction button is pressed is output from the HI device 270a. Then, as shown in FIG. 11, the button press detection unit 271 executes the press button detection process, and sets the button press flag corresponding to the lower side of the direction instruction button. Then, the determination in step S702 is “up or down”, and the document 2 is stored in the storage 210 as the display candidate content in step S703.

  Also, the determination in step S704 is “No”, and in step S706, the menu rewriting process is executed based on the information of the display candidate content stored in the storage 210. Then, the document selection menu on the display panel 260a is rewritten by the NVRAM 240, the graphic accelerator 250, the display driving unit 260, and the pixel writing unit 261 so that the document 2 in the document selection menu is highlighted as a display candidate. .

  Here, it is assumed that the user who viewed the rewritten document menu stopped pressing the direction button and pressed the enter button. Then, the determination in step S702 is “determined”, and in step S707, the display candidate content is set as a display target based on the display candidate content information stored in the storage 210. In step S708, The content entry set as the display target is extracted from the document management table stored in the storage 210. If the field value of the body field of the extracted entry is “none” (the document data of the content to be displayed has not been stored in the storage 210 of the information display device 3), the determination in step S709 is performed. Becomes “other than present”, and in step S711, the main body absence information display process is executed.

  When the bodyless information display process is executed, as shown in FIG. 14, in step S801, thumbnail images and document metadata are extracted from the document data of the content to be displayed. In step S802, the extracted thumbnails are displayed. A document information bitmap of a data group including an image and document metadata is generated. In step S803, the document data entry of the content set as the display target in step S707 is extracted from the document management table stored in the storage 210, and the field value of the link destination field of the extracted entry is extracted. In step S804, the server name in which the document data is stored is extracted from the extracted field value. In step S805, based on the extracted server name, the document data of the content to be displayed is displayed. A link information bitmap indicating the name of the server 2 in which is stored is generated.

  In step S806, a synchronization selection bitmap indicating a message for determining whether or not the document data of the content to be displayed is received from the server 2 at the next synchronization between the server 2 and the information display device 3 is generated. . In step S807, a screen bitmap composed of a combination of the document information bitmap, link information bitmap, and synchronization selection bitmap is generated, and screen bitmap processing is executed based on the screen bitmap. Then, the NVRAM 240, the graphic accelerator 250, the display driving unit 260, and the pixel writing unit 261 display the generated screen bitmap on the display panel 260a as shown in FIG.

  Here, it is assumed that the user who views the screen bitmap of the display panel 260a (an image in which the selection cursor selects “Yes”) presses the enter button. Then, the determination in step S808 becomes “determine”, the determination in step S810 becomes “Yes”, and in step S811, as shown in FIG. 16, “the field value of the ID field is“ 00000002 ”. After the field value of the main body field is set to “synchronous” and the menu display process is executed in step S812, the calculation process is terminated.

<When synchronizing server and information display device>
Next, it is assumed that the server 2 and the information display device 3 are connected via the data I / Fs 60 and 200 so that data transmission is possible. Then, the data display processing for synchronization is executed by the information display device 3, and as shown in FIG. 17B, first, in step S1001, the client document management table TBL1 in the storage 210 is transmitted to the server 2, The determination in step S502 is “No”, and the process waits until the client document management table TBL1 is transmitted from the server 2 in step S506.

  At the same time, the server 2 executes synchronization data transmission processing, and as shown in FIG. 17A, first, in step S901, the client document management table TBL1 output from the information display device 3 is received. In step S902, from the received client document management table TBL1, an entry whose field value of the synchronization field is synchronous, that is, an entry of document data of document 2, is extracted, and the determination in step S903 becomes “Yes”. Here, it is assumed that there is an area in the storage 20 of the information display device 3 that can store the document data of the document 2. Then, the determination in step S904 is “Yes”, and the transmission target field value setting process is executed in step S113.

When the transmission target field value setting process is executed, as shown in FIG. 9, the document data entry of the document 2 is first extracted from the server document management table TBL2 in step S301. After the link destination field value is set in the folder of the storage 210 of the information display device 3, the process returns to the synchronization data transmission process.
In step S114, document management table generation processing is executed. As shown in FIG. 10, first, in step S401, a file path field and a reference number field are added to the server document management table TBL2 in the storage 20. Thus, the client TBL1 is generated, and the entry whose field value of the link destination field is the own device (server 2) is extracted from the client TBL1. In step S402, the field value of the body field of the extracted entry is set to “none”. Further, in step S403, the field value of the reference number field of all entries of the generated client document management table TBL1 is set to “0”. In step S404, a link is created from the generated client document management table TBL1. An entry in which the storage 210 (memory card) of the information display device 3 is set as the field value of the destination field is extracted, and the file path is written in the file path field of the extracted entry in step S405, and then synchronized. Return to the data transmission process.

  When returning to the synchronization data transmission process, the generated client document management table TBL1 is transmitted to the information display device 3 in step S114, and the client document management table received in step S901 in step S905. After the document data of the entry whose synchronization field of TBL1 is “synchronization” is transmitted to the information display device 3, this calculation process is terminated. The information display device 3 receives and updates the transmitted client document management table TBL1 in step S506, receives the transmitted document data in step S1002, and receives the received document data. Then, after being stored in the area indicated by the field value of the link destination field of the entry of the document data included in the received (updated) client document management table TBL1, the calculation process is terminated.

  As described above, in the information display system 1 of the present embodiment, the document selection menu for selecting the document data stored in at least one of the server 2 and the information display device 3 is displayed, and the document selection menu is selected. When the document data thus stored is not stored in the information display device 3 but is stored only in the server 2, it is notified that the document data is stored in the server 2. Therefore, in addition to the document data of the content stored in the information display device 3, it is possible to select document data not stored in the information display device 3, and when the document data not stored is selected Can be notified that it is stored in the server 2. As a result, the selected document data can be easily stored in the information display device 3 by causing the information display device 3 to acquire the document data in accordance with the notification. When document data not stored in the information display device 3 is selected, the document data can be transmitted to the server 2 by selecting acquisition of the document data, and the drawing data Can be easily stored in the information display device.

As described above, step S701 in FIG. 12 constitutes the selection means described in the claims, and similarly, steps S709 to S711 in FIG. 12 constitute display means and constitute storage means.
Note that the information display device and the information display system of the present invention are not limited to the contents of the above-described embodiment, and can be changed as appropriate without departing from the spirit of the present invention.
In the above embodiment, an example in which document data with a small number of references is deleted when there is not enough free space in the storage 210 of the information display device 3 is shown, but the present invention is not limited to this. For example, only the page image data group included in the document data may be deleted. By doing so, the free space in the storage 210 can be increased, and instead of the document management table, the document selection menu is selected based on the document data without the page image data group, that is, the header portion of the document data. Can be generated and displayed.

  In addition, when the document data of the content to be displayed is not stored in the storage 210 of the information display device 2, that is, the memory card inserted in the information display device 2, but stored in the storage 20 of the server 2. Although an example of notifying that the document data is stored in the server 2 has been shown, the present invention is not limited to this. For example, when document data is stored in another memory card, it may be displayed that the data is stored in the other memory card. By doing so, document data can be displayed by inserting the other memory card, and various document data can be displayed without using the server 2.

It is a perspective view which shows the external appearance of the information display system to which this invention is applied. It is a block diagram which shows the internal structure of the server of FIG. It is explanatory drawing for demonstrating the data structure of document data. It is explanatory drawing for demonstrating the document management table for clients. It is explanatory drawing for demonstrating the document management table for servers. It is a block diagram which shows the internal structure of the information display apparatus of FIG. 6 is a flowchart illustrating print data transmission processing and reception processing. It is a flowchart which shows a deletion target field value setting process. It is a flowchart which shows a transmission target field value setting process. It is a flowchart which shows a document management table production | generation process. It is a flowchart which shows a pressing button detection process. It is a flowchart which shows a content selection process. It is explanatory drawing for demonstrating a document selection menu. It is a flowchart which shows a main body data no information display process. It is explanatory drawing for demonstrating a screen bitmap. It is explanatory drawing explaining the document management table for clients after an update. It is a flowchart which shows the data transmission process for a synchronization, and a reception process.

Explanation of symbols

1 is an information display system, 2 is a server, 3 is an information display device, 10 is a CPU, 20 is storage, 30 is RAM, 40 is a display, 50 is an input control unit, 50a is an input device, 60 is a data I / F, Reference numeral 100 denotes a data synchronization unit, 110 denotes a print data transmission processing unit, 200 denotes a data I / F, 210 denotes storage, 220 denotes a CPU, 230 denotes a program storage unit, 240 denotes NVRAM, 250 denotes a graphic accelerator, and 260 denotes a display driving unit 260a is a display panel, 261 is a pixel writing unit, 270 is an input control unit, 270a is an HI device, 271 is a button press detection unit, 280 is a power source, 300 is a document management unit, 310 is an analysis / shaping unit, and 320 is drawing Processing part

Claims (4)

An information display device that displays drawing data of content stored in its own device,
Selection means for selecting drawing data stored in at least one of the storage means of the own apparatus and storage means other than the own apparatus, and the selected drawing data when the selected drawing data is stored in the own apparatus. An information display device comprising: display means for displaying drawing data and notifying information related to a storage means in which the selected drawing data is stored when the drawing data is not stored in the own apparatus.   A first storage unit configured to store a thumbnail and meta information of the drawing data, wherein the selection unit selects the drawing data based on the thumbnail and meta information stored in the first storage unit; The information display device according to claim 1, wherein an image is displayed.   A second storage means for storing information relating to the storage means in which the drawing data is stored, wherein the display means selects the drawing data selected based on the information stored in the second storage means; Is stored in the storage means of the own device, and when it is determined that the image is stored in the storage means of the own device, the selected drawing data is displayed, 3. The information display apparatus according to claim 1, wherein when it is determined that the data is stored in a storage unit, information on the storage unit in which the selected drawing data is stored is notified. An information display system comprising a server that stores drawing data of all contents, and the information display device according to any one of claims 1 to 3 that stores the drawing data.
When the selected drawing data is not stored in the storage unit of the device, the information display device selects whether to acquire the drawing data, and when acquisition of the drawing data is selected. , Sending information indicating the acquisition of drawing data whose acquisition is selected to the server,
The server reads out drawing data indicated by information transmitted from the information display device, and transmits the drawing data to the information display device.

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