JP2009188776A - Electronic book system, mobile terminal with electronic book data receiving function, and electronic book data reproducing program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To greatly reduce storage capacity of a memory for storing electronic book data, and to also improve user friendliness. <P>SOLUTION: A cellular phone automatically performs a download request by closing the cellular phone, for example, after establishing connection with a server including a database storing electronic book data via a network and then selecting an electronic book to be reproduced and a reproducing method for the server (steps S1-S3). Thus, the first page portion of the electronic book data is transmitted from the server and downloaded into a RAM inside the cellular phone (steps S4, S5). Successively, when it is detected that the cellular phone is opened, shaken or inclined, the downloaded electronic book data are reproduced and displayed (step S6). Each time the cellular phone is opened/closed, shaken or inclined thereafter, the electronic book data are distributed from the server page by page, downloaded in the RAM and then displayed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electronic book system, a portable terminal with an electronic book data receiving function, and an electronic book data reproduction program, and more particularly, an electronic book system for distributing electronic book data from a server to a portable terminal via a network, with an electronic book data receiving function. The present invention relates to a portable terminal and an electronic book data reproduction program.

  Generally, in an electronic book system, an electronic book distribution company distributes electronic book data obtained by digitizing a book (which may include not only characters but also images) through a network such as an ADSL network, and a purchaser (user) ) Can be downloaded and viewed on a personal computer (hereinafter referred to as a personal computer), or electronic book data written on a recording medium such as a memory card can be sold to the user and viewed on the user's personal computer or mobile terminal. Yes.

  However, in this electronic book system, in order to store a large number of electronic book data, a memory inside the user's personal computer or external memory or a large-capacity memory as a memory in the mobile terminal is required, which increases the cost. Even if the memory is made into a large-scale semiconductor integrated circuit (LSI), the LSI is large and the device shape is enlarged.

  Therefore, when it is desired to browse new desired electronic book data, the electronic book data is newly downloaded and updated in a small-capacity memory, or a recording medium storing the electronic book data is exchanged. Troublesome work is required. Therefore, an electronic book system that eliminates the troublesome work of the user has been proposed (see, for example, Patent Documents 1 and 2).

  In Patent Document 1, every time there is a download request from a user's portable terminal, the server transmits electronic book data in a small-capacity memory by transmitting to the portable terminal a predetermined amount of data via the network. An invention of a configuration for holding and displaying only at certain times is disclosed.

  Also, in Patent Document 2, the identification information of the recording medium on which the identification information obtained by the user is recorded is transmitted to the server device, and the server device selects and transmits the content based on the identification information. Thus, an invention is disclosed in which a content can be acquired anywhere without carrying a recording medium to be exchanged. Further, this Patent Document 2 also discloses that copyright management after sales of the recording medium is performed at one place of the server device.

JP 2003-150597 A JP 2004-062728 A

  However, in the electronic book systems described in Patent Documents 1 and 2 described above, a memory having a storage capacity for storing a certain amount of electronic book data is required, although both have a small capacity. Insufficient price reduction and downsizing of the device.

  In addition, the purchased electronic book data is stored in a server such as an Internet connection provider, the server is accessed using a portable terminal having a communication function, and the desired electronic book owned by the user stored in the server The electronic book system described in Patent Documents 1 and 2 cannot retrieve data and distribute and reproduce it in a user's mobile terminal in a desired reproduction order.

  Furthermore, in order to realize the reproduction of electronic book data on a portable terminal, there is a problem that the load on the central processing unit (CPU) in the portable terminal is heavy, which affects the operation of the cellular phone when reproducing the electronic book data. is there.

  The present invention has been made in view of the above points, and an object thereof is to provide an electronic book system, a portable terminal with an electronic book data receiving function, and an electronic book data reproduction program capable of extremely reducing the storage capacity of a memory.

  Another object of the present invention is to provide an electronic book system, a portable terminal with an electronic book data receiving function, and an electronic book data reproduction program that improve the usability of the portable terminal.

In order to achieve the above object, an electronic book system of a first invention is an electronic book system that distributes electronic book data from a server to a mobile terminal via a network,
The mobile terminal operates according to the download request means for making a download request for electronic book data to the server by operating the mobile terminal itself, a storage unit having a storage capacity of electronic book data for one page, and the download request. Download means for storing the electronic book data for one page distributed from the server in the storage unit; and display means for displaying the electronic book data for one page stored in the storage unit;
The server includes transmission means for transmitting electronic book data for one page to the portable terminal through the network every time a download request is received from the portable terminal.

In order to achieve the above object, a portable terminal with an electronic book data receiving function according to a second aspect of the present invention is a portable terminal with an electronic book data receiving function that receives and reproduces electronic book data distributed from a server via a network. A terminal,
Download request means for requesting download of electronic book data to the server by operating the mobile terminal itself, a storage unit having a storage capacity of electronic book data for one page, and distributed from the server according to the download request It has download means for storing electronic book data for one page in a storage unit, and display means for displaying electronic book data for one page stored in the storage unit.

Furthermore, in order to achieve the above object, an electronic book data reproduction program of a third invention includes a storage unit having a storage capacity of one page of electronic book data used in the electronic book system of the first invention. An electronic book data reproduction program for causing a computer in a portable terminal to function, wherein the computer is
Download request means for making a download request for electronic book data to the server by operating the mobile terminal itself, download means for storing electronic book data for one page distributed from the server according to the download request in a storage unit, It is characterized by functioning as display means for displaying electronic book data for one page stored in the storage unit.

  According to the present invention, by playing back electronic book data while downloading it for each page, the storage capacity of the memory can be made extremely small, the copyright can be protected, and the usability can be improved.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a schematic system configuration diagram of an embodiment of an electronic book system according to the present invention. In the electronic book system of the present embodiment, the foldable mobile phone 100 which is an embodiment of the mobile terminal of the present invention is connected to the electronic book data storage service provider via the base station 200 and the Internet network 300 as an example of a network. The configuration is connected to the provided server 400.

  The mobile phone 100 is a foldable mobile phone in which a first housing 101 and a second housing 102 are connected to each other by a hinge portion 103 so as to be openable and closable around the hinge portion 103. On the inner surface of the first housing 101, a display unit 104 and a receiver for receiving 105 are arranged. An input unit 106 and a transmission microphone 107 are arranged on the inner side surface of the second housing 102. For example, a camera is disposed on the back surface of the first housing 101. In addition, the mobile phone 100 has a function capable of communicating with the server 400 via the base station 200 and the Internet network 300 by HSDPA (High Speed Downlink Packet Access), which is currently known as a high-speed packet communication method for mobile phones. Have.

  The server 400 is a server provided by an electronic book data storage service provider, and includes a database 401 that stores electronic book data purchased by a user and an electronic book playlist.

  FIG. 2 shows a block diagram of an embodiment of the mobile phone 100 in FIG. 2, the same components as those in FIG. 1 are denoted by the same reference numerals. In FIG. 2, in addition to the display unit 104, receiver for receiving 105, input unit 106, and microphone for transmitting 107 described above, a mobile phone 100 includes a central processing unit (CPU) 110 that controls each unit centrally, HSDPA communication unit 111 for performing HSDPA communication with station 200, random access memory (RAM) 112 as an example of a storage unit, voice connected to receiving receiver 105 and transmitting microphone 105 A processing unit 113, a sound source processing unit 114 that processes sound effects, an open / close detection unit 115, an acceleration sensor 116, a camera 117, a tilt detection unit 118, a speaker 119 that produces sound effects, and a music signal are output. And an external connection terminal 120.

  The HSDPA communication unit 111 performs HSDPA communication with the nearest base station 200 at a maximum data rate of 14.4 Mbps. In this HSDPA communication, it is possible to transmit data of about several tens of kB, which is one page of electronic book data, in a few seconds. The RAM 112 has a storage capacity that can store the electronic book data of about one page, and has an extremely small capacity, an inexpensive, and small configuration as compared with the memory used in the electronic book systems described in Patent Documents 1 and 2. .

  The voice processing unit 113 converts received voice data received by the HSDPA communication unit 111 and analyzed by the CPU 110 into a voice signal and supplies it to the receiver 105 for electro-acoustic conversion, thereby generating the received voice. On the other hand, the microphone 107 performs predetermined signal processing on the transmission voice signal obtained by acoustic-electrical conversion of the transmission voice, and supplies the signal to the HSDPA communication unit 111 via the CPU 110 for transmission. . The sound source processing unit 114 processes the sound effect signal supplied from the CPU 110 and supplies it to the speaker 119 to perform electro-acoustic conversion, thereby generating a sound effect and outputting the sound effect signal to the external connection terminal 120. To do.

  The open / close detection unit 115 detects whether the first housing 101 and the second housing 102 of the mobile phone 100 shown in FIG. 1 are in an open state or a closed state. Specifically, for example, a magnet is provided on one of the first casing 101 and the second casing 102, and a magnetic detection element such as a Hall element is positioned on the other side so as to face the above magnet when closed. Provided. Thereby, when the inner surfaces of the casings 101 and 102 are in a closed state, the magnetic detection element detects the maximum magnetic force, and the output at that time is output as a closed state detection signal. Since the magnetism is not detected by the magnetic detection element when the inner surfaces of 102 are in the open state, the output at that time is output as an open state detection signal. The configuration of the open / close detection unit 115 is known. Of course, the open / close detection unit 115 may be configured using a limit switch, and the configuration thereof is arbitrary.

  The acceleration sensor 116 is a sensor for detecting whether or not the mobile phone 100 is shaken, and its configuration is well known. The tilt detector 118 receives a video signal obtained by photographing with the camera 117 as an input, and detects whether the subject (or the mobile phone 100) is tilted based on the input video signal. The configuration itself of the inclination detection unit 118 is known, and for example, the technology of GestureTek (registered trademark) can be used.

  Next, the operation of the electronic book system of this embodiment shown in FIGS. 1 and 2 will be described with reference to the flowchart of FIG. First, the user opens the mobile phone 100, operates the input unit 106, logs in to the provider server 400 via the base station 200 and the Internet network 300, and connects (step S1). The server 400 authenticates the user of the mobile phone 100 (step S2). If the authentication is OK, the server 400 permits the internal reference of the database 401 allocated in advance to the user of the mobile phone 100 and is stored in the database 401. The electronic book playlist is transmitted to the mobile phone 100.

  Subsequently, the user of the mobile phone 100 looks at the received electronic book playlist displayed on the display unit 104 and wants to reproduce the electronic book and its reproduction method (sequential reproduction, random reproduction, frequently viewed order, new publication order). Are selected by operating the input unit 106, and the selection information is transmitted from the mobile phone 100 to the server 400 through the base station 200 and the Internet network 300 (step S3). At this time, it is possible to designate the first page to start reproduction.

  Subsequently, the user turns the mobile phone 100 from the open state to the closed state. This closed state is determined by the CPU 110 based on a detection signal from the open / close detection unit 115. When the CPU 110 detects the closed state, it transmits a download start request to the base station 200 via the HSDPA communication unit 111 as a trigger. When the server 400 receives the download start request from the base station 200 through the Internet network 300, the server 400 transmits the electronic book data of the first page of the electronic book selected by the user stored in the database 401 according to the selected reproduction method. To do.

  The mobile phone 100 receives the first page of electronic book data by the HSDPA communication unit 111 through the Internet network 300 and the base station 200, and prepares display data for the RAM 112 under the control of the CPU 110 and receives the received electronic book data. Downloading is started (step S4).

  In this way, when the download of the electronic book data of the first page to the RAM 112 is completed in a few seconds (step S5), the CPU 110 monitors whether an open state detection signal is input from the open / close detection unit 115. When the user switches the cellular phone 100 from the closed state to the open state again, the CPU 110 detects that the mobile phone 100 is in the open state because the open state detection signal is input from the open / close detection unit 115 (step S6). Accordingly, the user can browse the first page of the electronic book data reproduced and displayed on the display unit 104 of the mobile phone 100.

  Subsequently, CPU 110 determines whether the page of the electronic book data currently downloaded to RAM 112 is the last page (step S7). If it is not the last page, the CPU 110 receives a closed state detection signal output from the open / close detection unit 115 when the mobile phone 100 is closed, or a vibration output from the acceleration sensor 116 when the mobile phone 100 is shaken. An input of a detection signal or an input of an inclination detection signal output from the inclination detection unit 118 when the mobile phone 100 is inclined is detected (step S8). The detection in step S8 is performed when the user operates the mobile phone 100 (a closing operation, a shaking operation, or a tilting operation) at an arbitrary timing when the user has finished browsing the first page of the electronic book data.

  When the detection in step S8 is performed, the CPU 110 deletes the electronic book data for one page stored in the RAM 112, and transmits a download request for the next page to the server 400 (step S9).

  In accordance with the download request, the server 400 transmits the electronic book data of the next page of the electronic book (the second page at this time) from the database 401 according to the selected reproduction method. Thereby, the mobile phone 100 receives the electronic book data of the next page by the HSDPA communication unit 111 through the Internet network 300 and the base station 200, and downloads the received electronic book data of the next page to the RAM 112 of the CPU 110. The control is completed (step S5).

  Thereafter, the processes of steps S6 to S9 and S5 to S7 are repeated until the electronic book data of the last page is completely downloaded to the RAM 112. When the e-book data of the last page is stored in the RAM 112, the user views the e-book data of the last page displayed on the display unit 104, and the CPU 110 detects that it is the last page (YES in step S7). Then, the electronic book reproduction is finished (step S10), and the user logs out (step S11).

  When the detection process of step S6 is executed for the first time after the download of the electronic book data for the first page is completed, it is detected that the open state detection signal is input from the open / close detection unit 115. In step S6, the detection process corresponding to the detection process in step S8 is normally performed.

  For example, when the CPU 110 detects the closed state detection signal input from the open / close detection unit 115 in step S8, the CPU 110 detects that the open state detection signal is input from the open / close detection unit 115 in the next step S6. In this case, the cellular phone 100 is closed to download one page of electronic book data, and the cellular phone 100 is opened to allow the user to view the downloaded electronic book data for one page on the display unit 104. enable. That is, the user can read the electronic book data page by page like reading a book or newspaper simply by repeating the operation of closing and opening the mobile phone 100.

  When CPU 110 detects the detection signal input from acceleration sensor 116 in step S8, CPU 110 also detects the detection signal input from acceleration sensor 116 in the next step S6. In this case, an acceleration detection signal is output from the acceleration sensor 116 every time the user shakes the mobile phone 100. Therefore, the user reads the book or newspaper one page at a time so as to read a book or newspaper by the operation of shaking the mobile phone 100. I can read it.

  When CPU 110 detects an inclination detection signal input from inclination detection unit 118 in step S8, CPU 110 also detects an inclination detection signal input from inclination detection unit 118 in the next step S6. In this case, each time the user tilts the mobile phone 100, a detection signal is output from the tilt detection unit 118. Therefore, the user tilts the mobile phone 100 and the electronic book data is read page by page as if reading a book or newspaper. I can read it.

  However, when detecting the input of the acceleration detection signal or the tilt detection signal in step S6, the mobile phone 100 needs to be in the open state. Note that the download start process in step S4 may be performed by shaking or tilting the mobile phone 100 instead of closing the mobile phone 100, and the detection process in step S6 on and after the next page is performed. The detection process may not be the detection process corresponding to the detection process in step S8 (in this case, the download request operation on the next page is different from the reproduction display operation).

  Here, since the electronic book data may include sound effects and the like, the capacity of the RAM for storing one book of electronic book data usually requires several hundred kB even in a compressed state. In the case of continuous reading, it is assumed that the capacity of the above-mentioned RAM needs to be at least twice as large as the electronic book data for one book, and there is a possibility that the cost and outline of the mobile phone will be greatly affected. .

  On the other hand, according to the present embodiment, since the electronic book data is displayed on the display unit 104 while being downloaded to the RAM 112 for each page, the RAM 112 is a RAM for storing one book of electronic book data. Compared to the capacity of the electronic book data, it is possible to store an electronic book data corresponding to one page at an extremely small capacity at an inexpensive and small size.

  Further, according to the present embodiment, since the electronic book data is downloaded to the RAM 112 for each page, it is not necessary to store one electronic book data in the RAM 112, and one electronic book data is stored in the external memory or the like. Can not be moved, so copyright protection is possible. In addition, when the power of the mobile phone 100 is turned off, the data stored in the RAM 112 is also erased, so that copyright protection is possible from this point.

  Further, in the present embodiment, purchased electronic book data is stored in a server 400 such as an Internet connection provider, the server is accessed using a mobile terminal having a communication function, and the user stored in the server Search for desired electronic book data owned by the user, distribute it to the user's mobile phone 100 in the desired playback order, and play it back, and the user opens / closes, shakes, or tilts the mobile phone 100 at his / her arbitrary timing. Thus, since the electronic book data can be read page by page, there is an effect that it is easy to use. Further, in the present embodiment, in order to reproduce the electronic book data page by page, the load on the CPU 110 is small and does not affect the cellular phone operation at the time of reproducing the electronic book data.

  Note that the present invention is not limited to the above embodiment, and includes, for example, an electronic book data reproduction program that causes the CPU 110 to perform the same processing as the processing of the flowchart shown in FIG.

  2 and 3, the open / close detection unit 115, the acceleration sensor 116, and the tilt detection unit 118 are provided so that the electronic book data can be stored in any one of the open / close operation, the swing operation, and the tilt operation of the folding mobile phone 100. Although the description has been made so that the download and reproduction of the downloaded electronic book data are performed on the display unit 104, any one or two of the opening / closing detection unit 115, the acceleration sensor 116, and the inclination detection unit 118 are provided. , Operations corresponding to them may be performed. Further, according to the present invention, the mobile phone 100 may not be a foldable type (in this case, the opening / closing detection unit 115 is not required). Applicable.

1 is a schematic system configuration diagram of an embodiment of an electronic book system of the present invention. It is a block diagram of one Embodiment of the portable terminal with an electronic book data reception function of this invention. It is a flowchart for operation | movement description of the electronic book system of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Folding-type mobile phone 101 1st housing | casing 102 2nd housing | casing 103 Hinge part 104 Display part 105 Receiver for reception 106 Input part 107 Microphone for transmission 110 Central processing unit (CPU)
111 HSDPA communication unit 112 Random access memory (RAM)
DESCRIPTION OF SYMBOLS 113 Audio | voice processing part 114 Sound source processing part 115 Opening / closing detection part 116 Acceleration sensor 117 Camera 118 Tilt detection part 119 Speaker 120 External connection terminal

Claims (18)

An electronic book system that distributes electronic book data from a server to a mobile terminal via a network,
The portable terminal is
Download request means for making a download request for the electronic book data to the server by operating the mobile terminal itself;
A storage unit having a storage capacity of the electronic book data for one page;
Download means for storing, in the storage unit, the electronic book data for one page distributed from the server according to the download request;
Display means for displaying the electronic book data for one page stored in the storage unit,
The server
An electronic book system comprising: transmission means for transmitting the electronic book data for one page to the portable terminal through the network every time the download request is received from the portable terminal. An electronic book system that distributes electronic book data from a server to a mobile terminal via a network,
The portable terminal is
A download start request means for making a download start request for downloading any electronic book data to the server by an arbitrarily designated reproduction method;
A storage unit having a storage capacity of the electronic book data for one page;
Download request means for performing a download request for downloading the electronic book data to the server by operating the mobile terminal itself;
Download means for storing, in the storage unit, the electronic book data for one page distributed from the server in accordance with the download start request or the download request;
Display means for displaying the electronic book data for one page stored in the storage unit,
The server
A database for storing electronic book data and electronic book playlist purchased by the user of the mobile terminal;
Receiving means for receiving the download start request or the download request transmitted from the mobile terminal;
After the connection with the portable terminal is established, the electronic book playlist is transmitted from the database, and when the download start request is received by the receiving unit after the transmission, the specified first page of the specified electronic book is transmitted. Each time electronic book data is transmitted from the database through the network, and the download request is received by the receiving means, the electronic book data on and after the next page of the designated electronic book is transferred from the database one page at a time. An electronic book system comprising: transmission means for transmitting to the portable terminal.   The portable terminal further includes an erasing unit that erases the storage content of the storage unit immediately before the download unit stores the electronic book data for one page distributed from the server in the storage unit. The electronic book system according to claim 1 or 2, characterized in that The mobile terminal is a foldable mobile phone;
The download request means includes
Open / close detection means for detecting whether the folding cellular phone is in an open state or a closed state;
4. A download request generating and transmitting unit that generates the download request and transmits the download request to the server through the network when a detection signal is input from the open / close detection unit. An electronic book system according to claim 1. The download request means includes
Acceleration detecting means for detecting that the mobile terminal is shaken;
4. A download request generation and transmission unit configured to generate the download request and transmit it to the server through the network when a detection signal is input from the acceleration detection unit. An electronic book system according to claim 1. The download request means includes
Inclination detecting means for detecting that the portable terminal is inclined;
The download request generation and transmission means for generating the download request and transmitting it to the server through the network when a detection signal is input from the tilt detection means. An electronic book system according to claim 1. A portable terminal with an electronic book data receiving function for receiving and reproducing electronic book data distributed from a server via a network,
Download request means for making a download request for the electronic book data to the server by operating the mobile terminal itself;
A storage unit having a storage capacity of the electronic book data for one page;
Download means for storing, in the storage unit, the electronic book data for one page distributed from the server according to the download request;
A portable terminal with an electronic book data receiving function, comprising: display means for displaying the electronic book data for one page stored in the storage unit. A portable terminal with an electronic book data receiving function for receiving and reproducing electronic book data distributed from a server via a network,
A download start request means for making a download start request for downloading any electronic book data to the server by an arbitrarily designated reproduction method;
A storage unit having a storage capacity for the electronic book data for one page;
Download request means for performing a download request for downloading the electronic book data to the server by operating the mobile terminal itself;
Download means for storing, in the storage unit, the electronic book data for one page distributed from the server according to the download start request or the download request;
A portable terminal with an electronic book data receiving function, comprising: display means for displaying the electronic book data for one page stored in the storage unit.   2. The apparatus according to claim 1, further comprising an erasing unit that erases the storage contents of the storage unit immediately before the download unit stores the electronic book data for one page distributed from the server in the storage unit. A portable terminal with an electronic book data receiving function according to 7 or 8. A foldable mobile phone, wherein the download request means is:
Open / close detection means for detecting whether the folding cellular phone is in an open state or a closed state;
The download request generation and transmission means for generating the download request and transmitting it to the server through the network when a detection signal is input from the open / close detection means. A portable terminal with an electronic book data receiving function according to claim 1. The download request means includes
Acceleration detecting means for detecting that the mobile terminal is shaken;
The download request generation and transmission means for generating the download request and transmitting it to the server through the network when a detection signal is input from the acceleration detection means. A portable terminal with an electronic book data receiving function according to claim 1. The download request means includes
Inclination detecting means for detecting that the portable terminal is inclined;
9. A download request generation and transmission unit configured to generate the download request and transmit the download request to the server through the network when a detection signal is input from the inclination detection unit. A portable terminal with an electronic book data receiving function according to claim 1. An electronic book data reproduction program for causing a computer in a portable terminal including a storage unit having a storage capacity of electronic book data for one page to be used for the electronic book system according to claim 1,
The computer,
Download request means for making a download request for the electronic book data to the server by operating the mobile terminal itself;
Download means for storing, in the storage unit, the electronic book data for one page distributed from the server according to the download request;
An electronic book data reproduction program that functions as display means for displaying the electronic book data for one page stored in the storage unit. An electronic book data reproduction program for causing a computer in a portable terminal provided with a storage unit having a storage capacity of the electronic book data for one page to be used for the electronic book system according to claim 2,
The computer,
A download start request means for making a download start request for downloading any electronic book data to the server by an arbitrarily designated reproduction method;
Download request means for performing a download request for downloading the electronic book data to the server by operating the mobile terminal itself;
Download means for storing, in the storage unit, the electronic book data for one page distributed from the server in accordance with the download start request or the download request;
An electronic book data reproduction program that functions as display means for displaying the electronic book data for one page stored in the storage unit.   Causing the computer to further function as an erasing unit for erasing the stored contents of the storage unit immediately before storing the electronic book data for one page distributed from the server in the storage unit by the download unit. 15. The electronic book data reproduction program according to claim 13 or 14, characterized in that: The mobile terminal is a foldable mobile phone, and has an open / close detection means for detecting whether the foldable mobile phone is in an open state or a closed state;
The download request means functions as download request generation and transmission means for generating the download request and transmitting it to the server through the network when a detection signal is input from the open / close detection means. The electronic book data reproduction program according to any one of 13 to 15. The mobile terminal has acceleration detection means for detecting that the mobile terminal is shaken,
The download request means functions as a download request generation and transmission means for generating the download request and transmitting it to the server through the network when a detection signal is input from the acceleration detection means. The electronic book data reproduction program according to any one of 13 to 15. The mobile terminal has an inclination detection means for detecting that the mobile terminal is tilted,
The download request means functions as a download request generation and transmission means for generating the download request and transmitting it to the server through the network when a detection signal is input from the inclination detection means. The electronic book data reproduction program according to any one of 13 to 15.

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