JP2013164788A - Electronic apparatus, method for controlling display, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic apparatus, when displaying an electronic book on a screen and turning a page, allowing a user to easily obtain a changeover part of a content of the electronic book displayed on the screen and to provide a method for controlling a display and a program.SOLUTION: An electronic apparatus 100 has, as a display mode, a hierarchical display mode for displaying the content of an electronic book into at least two hierarchies. In the hierarchical display mode, each page image 22 of the electronic book is displayed as an image to be displayed in a lower hierarchy, and a representative image 23 being representative relating to the page image 22 displayed in the lower hierarchy is displayed as an image to be displayed on an upper hierarchy. When an operation for changing the image is performed to an image of either hierarchy, an image of the other hierarchy is changed in conjunction therewith. Further, the hierarchical display mode may be manually set by a user or automatically set according to a page turning speed.

Description

  The present invention relates to an electronic device, a display control method, and a program, and more particularly, to an electronic device that can display an electronic book, a display control method in the electronic device, and a program.

  Compared with a conventional paper book, an electronic book can store a plurality of electronic book data with a single device, and thus is convenient for carrying and can easily manage the book. Because of such various advantages, electronic devices capable of displaying various forms of electronic books such as a dedicated electronic book machine, a mobile phone, a smartphone, and a PDA (Personal Digital Assistant) have become widespread.

  However, when searching for a desired page from a large amount of book data on a limited display screen, usually, while opening and browsing an electronic book file, page feed, page return, etc. are performed to reach the required page. The method was taken. And since an electronic book cannot visually sense the content such as the thickness of the book (the amount of paper) like a printed book, many of them are used to develop user interface displays with good operability. Attempts have been made.

  For example, when a function of turning a page at a high speed in order to find a desired page is provided, a display of a moving bar or the like is used to indicate the position in the book of the currently turned page. Japanese Patent Application Laid-Open No. 2004-151867 discloses a display method for displaying only the entire page image when switching only a part of the page image instead of the entire page image and displaying the user's desired page during the page turning operation for sequentially switching the images. Is disclosed.

JP 2010-204418 A

  However, what is understood from the display of the moving bar is the position in the content of the electronic book, and it is necessary to look at the page image to grasp the contents of the page. For this reason, when turning pages at high speed, it is not possible to easily understand what kind of article or description page is currently turned. In addition, when turning a page to read a specific article or description, the moving bar itself cannot grasp the switching location of the article or description. Further, even with the display method disclosed in Patent Document 1, it is possible to reduce the amount of image decoding processing, but it is not possible to grasp the switching location of articles and descriptions as described above.

  The present invention has been made in view of these circumstances, and when an electronic book is displayed on a screen and a page is turned, an electronic device that can easily grasp the switching position of the contents of the electronic book displayed on the screen. An object is to provide a device, a display control method, and a program.

  In order to solve the above-described problem, a first technical means of the present invention is an electronic device that displays an electronic book on a screen, and displays the contents of the electronic book as at least two layers as a display mode. A layer that changes an image displayed on another layer in conjunction with an image displayed on one of the layers when an operation for changing the image is performed on the image displayed on one layer It has a different display mode.

  According to a second technical means, in the first technical means, in the display mode by hierarchy, the image displayed in the lower hierarchy of the image displayed by the hierarchy is an image of the page of the electronic book, and is classified by the hierarchy. The image displayed on the upper layer of the displayed image is an image related to the page or a plurality of pages including the page.

  According to a third technical means, in the second technical means, the image displayed on the upper hierarchy is a reduced image of the image displayed on the lower hierarchy.

  According to a fourth technical means, in the second technical means, the image displayed in the upper hierarchy is an image relating to a heading of the image displayed in the lower hierarchy.

  According to a fifth technical means, in the second technical means, the image displayed on the upper hierarchy is an image obtained by extracting a part of the image displayed on the lower hierarchy.

  A sixth technical means is the technical means according to any one of the second to fifth aspects, wherein the electronic book has a table of contents, and the image displayed on the upper hierarchy is an image generated based on the table of contents. It is characterized by.

  In a seventh technical means, in any one of the second to sixth technical means, the image displayed in the highest hierarchy among the images displayed in the higher hierarchy displays unique information of the electronic book. It is characterized by being.

  According to an eighth technical means, in the seventh technical means, the unique information of the electronic book includes at least one of a cover image, an author name, a publisher name, and a series name of the electronic book. Is.

  According to a ninth technical means, in any one of the second to eighth technical means, an image of the page of the electronic book is displayed in a double spread.

  According to a tenth technical means, in any one of the second to ninth technical means, the image displayed for each hierarchy is an image displayed for each region obtained by dividing the screen.

  The eleventh technical means according to any one of the second to ninth technical means is characterized in that the image displayed on the upper hierarchy is displayed superimposed on the image displayed on the lower hierarchy. It is.

  According to a twelfth technical means, in any one of the second to eleventh technical means, an area of a display area of each layer of the image displayed by each layer can be changed by a user operation. It is.

  In a thirteenth technical means according to any one of the second to twelfth technical means, the image displayed on the lower hierarchy and the image displayed on the upper hierarchy corresponding to the image displayed on the lower hierarchy. It is characterized by further displaying information indicating the correspondence relationship.

  A fourteenth technical means in the thirteenth technical means, as information indicating the correspondence relationship, an outer peripheral portion of the image displayed on the lower hierarchy and an upper hierarchy corresponding to the image displayed on the lower hierarchy. A margin portion of the same color is displayed on the outer peripheral portion of the displayed image.

  According to a fifteenth technical means, in the thirteenth technical means, when the image displayed on the upper layer is updated as the information indicating the correspondence relationship, the image displayed on the upper layer and the upper layer A connection line is displayed between an image displayed on a lower layer corresponding to an image displayed on the layer.

  In a sixteenth technical means according to any one of the first to fifteenth technical means, the display means further includes a normal display mode for displaying only an image of each page of the electronic book on the screen. Is.

  A seventeenth technical means includes, in the sixteenth technical means, an operation input unit that accepts switching of a display mode from a user, and the normal display mode and the hierarchical display mode are set according to an operation to the operation input unit. It is characterized by switching.

  According to an eighteenth technical means, in the sixteenth or seventeenth technical means, the image displayed at the lowest hierarchy of the images displayed by the hierarchy is an image of the page of the electronic book, and the page of the page from the user is displayed. It has a page turning means for receiving a page turning operation of an image, and when the page turning operation is at a predetermined speed or more, the display mode is set to the display mode by hierarchy. is there.

  A nineteenth technical means is a display control method for displaying an electronic book on a screen of an electronic device, the display step by level displaying the contents of the electronic book on the screen by at least two levels, and displaying by level A change operation accepting step for accepting an operation for changing the display of the image displayed on any one of the hierarchized images, and other hierarchies displayed for each of the hierarchies when the operation is accepted And a display change step of changing the image displayed in conjunction with the image displayed on any one of the layers.

  A twentieth technical means is a program for displaying an electronic book on a screen of an electronic device, and is a computer program for causing a computer to execute a display control method which is the nineteenth technical means.

  According to the present invention, since the contents of the electronic book are displayed by hierarchy, it is possible to grasp "rough information such as page layout" from the image displayed on the lower hierarchy, and from the image displayed on the upper hierarchy, It is possible to grasp what kind of heading or content the page is currently turned over. Thereby, even when turning pages at high speed, it is possible to easily grasp the switching of the contents of the electronic book, and it is possible to roughly grasp what kind of contents it is. Therefore, a desired page can be found quickly. Further, by looking at the switching timing of the images displayed in the upper layer, it is possible to know the amount of each article and description portion in the lower layer related to the image displayed in the upper layer.

It is a figure for demonstrating the example of a display of the electronic device and electronic book which concern on embodiment of this invention. It is a figure for demonstrating the example of the image used as a representative image. It is a figure which shows an example of a structure of the electronic device which concerns on embodiment of this invention. It is a figure which shows an example of the page structure of an electronic book. It is a figure for demonstrating the example of the data structure of an electronic book. It is a figure for demonstrating an example of matching with the anchor information in the electronic book data which does not have the concept of a page, and the page on a display. It is a flowchart which shows an example of the process sequence in one structure of the electronic device which concerns on embodiment of this invention. FIG. 7B is a flowchart subsequent to FIG. 7A. It is a figure for demonstrating an example of the display area of a screen. It is a flowchart which shows another example of the process sequence in one structure of the electronic device which concerns on embodiment of this invention. It is a figure which shows an example of the other structure of the electronic device which concerns on embodiment of this invention. It is a flowchart which shows an example of the process sequence in the other structure of the electronic device which concerns on embodiment of this invention. FIG. 11B is a flowchart continued from FIG. 11A. It is a figure for demonstrating the other example of a display of the electronic book which concerns on this invention. It is a figure for demonstrating the other example of a display of the electronic book which concerns on this invention. It is a figure for demonstrating the other example of a display of the electronic book which concerns on this invention. It is a figure for demonstrating the other example of a display of the electronic book which concerns on this invention. It is a figure which shows an example of the further another structure of the electronic device which concerns on embodiment of this invention.

Hereinafter, preferred embodiments according to an electronic device, a display control method, and a program of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram for explaining a display example of an electronic device and an electronic book according to an embodiment of the present invention.

  As shown in FIG. 1A, the electronic device 100 returns a screen 101 for displaying an electronic book, a page feed button 103 for sending a page of the electronic book displayed on the screen 101, and a page, for example. The page return button 104 is provided. Here, the screen 101 constitutes a part of a display unit to be described later, and the touch panel 102 that detects the contact position of the user's hand with respect to the screen 101, that is, the touch position, is integrally configured. A display unit in which a touch panel is integrally formed may be configured using existing technology, and a liquid crystal screen, an organic EL screen, or the like can be used as a screen. Note that FIG. 1A also shows a page image of an electronic book displayed on the electronic device 100.

  In the electronic apparatus of the present invention, the screen 101 normally has a normal display mode in which an image for one page of the electronic book is displayed on the entire screen. In this normal display mode, the page feed button 103 is pressed. Thus, the image displayed on the screen can be sent one page ahead. In FIGS. 1A and 1B, the page image 21 of the page P6 of the electronic book is displayed on the screen 101, but the page feed is performed each time the page feed button 103 is pressed, the page image of the page P7, The display on the screen 101 is changed in the order of page images of the page P8. Further, each time the page return button 104 is pressed, the image displayed on the screen can be returned backward by one page.

  The page turning operation for page turning or page returning can also be performed by an operation on the touch panel 102. For example, when the user touches the page image 21 of the page P6 displayed on the screen and performs a slide operation in the arrow A direction shown in FIG. 1B, the page is turned and the page image of the page P7 is displayed. The Further, by performing a sliding operation in a direction opposite to the arrow A direction shown in FIG. 1B, the image displayed on the screen can be returned to the back. The page feed button 103, the page return button 104, and the touch panel 102 correspond to the page turning means of the present invention.

  In the present invention, when the page feed button 103 or the page return button 104 is continuously pressed for a predetermined time or when the slide operation on the touch panel 102 is performed at a predetermined speed or higher, the displayed image is changed at high speed. Fast page turning is performed. In the case of high-speed page turning, as shown in FIG. 1C, a column of representative images 23 related to the page image is displayed according to the hierarchy together with the page image 22. FIG. 1C illustrates a state in the middle of switching from the page image of page P6 to the page image of page P7.

  Here, the representative image 23 is an image related to one or a plurality of pages related to an article between the breaks at which the contents of the electronic book are switched (hereinafter also referred to as “section”). It is an image related to an article that describes a group of contents. In an electronic book, additional information (hereinafter, also referred to as “anchor information”) is linked to a portion that is divided in terms of content, such as a cover, a table of contents, the beginning of each article, or the beginning of a sentence. There are many. For example, information on a character string for a table of contents, information such as an article or sentence headline, or link information jumped from another page corresponds to the additional information. In the present invention, a representative image related to an article divided by a portion where these pieces of information are linked is called a “representative image”, and when performing high-speed page turning, It is displayed in another area.

  Note that the electronic device of the present invention performs display by laying out one screen as a page unit when displaying an electronic book in a format (XML, HTML, etc.) that does not have the concept of a page in the data structure. . For this reason, even if the format does not have the concept of a page in the data structure, it is displayed for each page. Therefore, in the present invention, the display unit in such display in one screen unit is handled as a page. If one file does not fit on one page, it can be handled by dividing the file into a plurality of pages. Data format processing that does not have the concept of a page in the data structure will be described later.

  Therefore, in the case of high-speed page turning, the electronic book is displayed in the display mode by hierarchy displayed by hierarchy. In the example of the hierarchical display shown in FIG. 1C, the image displayed on the lower hierarchy is the page image 22 of the electronic book, and the image displayed on the upper hierarchy is the representative image 23. In the hierarchical display mode, the representative image 23 is updated when the page image 22 that is an image displayed in the lower hierarchy is turned and reaches a new page linked with the additional information. The That is, the representative image 23 displayed on the upper layer is updated in conjunction with the predetermined update of the page image 22 displayed on the lower layer. In the example of the display by hierarchy shown in FIG. 1C, the representative image is a reduced image of the first page of the section, and the page image 22 is turned to start from the page image of the page P6 belonging to the first chapter. When switching to the page image of page P7 belonging to chapter 2, the representative image is from the reduced image of page 3 which is the representative image from page 3 which is chapter 1 to page P6, and from page 7 which is chapter 2 The state at the time of switching to the reduced image of page 7 which becomes a representative image up to P9 is shown.

  Further, the hierarchical display mode is maintained until a predetermined time elapses after the operation related to high-speed page turning is completed. At that time, when the representative image 23 is touched and a slide operation is performed in the direction of arrow A shown in FIG. 1C, the representative image 23 is updated, and the representative image 23 is updated. Thus, the page image 22 corresponding to the newly updated representative image is displayed. That is, the page image 22 displayed on the lower layer is updated in conjunction with the update of the representative image 23 displayed on the upper layer. As will be described later, the hierarchical display mode can be switched from the normal display mode not only when high-speed page turning is performed but also when the user performs a predetermined operation. .

  Next, the representative image will be specifically described. For example, in page P1 to page P10 shown in FIG. 1A, page P1 is the cover, page P2 is the table of contents, page P3 to page P6 is the first chapter, page P7 to page P9 is the second chapter, When the page P10 and subsequent chapters are Chapter 3, the page P1, the page P2, the page P3, the page P7, and the page P10 each correspond to a page including a delimiter that changes in content in the electronic book. A representative image of an article between these breaks is a representative image. Therefore, it can be said that the representative image is an image related to a page including these breaks or a plurality of pages included between the breaks.

  FIG. 2 is a diagram for explaining an example of an image used as a representative image. FIG. 2A shows a page 201 of a page including a break that changes in content in an actual book. FIGS. 2B, 2C, and 2D show the electronic books displayed by hierarchy. An example displayed in the mode is shown. It is assumed that the paper surface 201 has a heading 201 or an illustration 202 regarding the contents after the page to be divided.

  In the hierarchical display mode shown in FIG. 2B, a reduced image (thumbnail image) 211 of a lower layer page is displayed as a representative image to be displayed on the upper layer together with the page image 22 displayed on the lower layer. Yes. In the hierarchical display mode shown in FIG. 2C, an image 212 related to the heading 202 that is a part of the page image in the lower hierarchy is displayed as a representative image to be displayed in the upper hierarchy. Further, in the hierarchical display mode shown in FIG. 2D, an image 213 relating to the illustration 203 which is a part of the page image in the lower hierarchy is displayed as the representative image displayed in the upper hierarchy. As described above, the image used as the representative image may be a headline of an article or a sentence, a representative image in an article or a sentence, or a character string of a table of contents related to the article or the sentence.

  In FIG. 2, the case where the representative image is acquired from the paper surface 201 of the first page including a break that switches content is described as an example. However, the acquisition position of the representative image is arbitrary, and the example illustrated in FIG. In this way, it may be acquired from a page including a break that becomes the first page of an article, or may be acquired from another page belonging to the same section (between the same break and the break).

(Device configuration example 1)
FIG. 3 is a diagram illustrating an example of the configuration of the electronic device according to the embodiment of the present invention, and illustrates the device configuration example 1. As shown in the figure, the electronic device 100 includes a storage unit 1, a reproduction control input processing unit 2, an overall control unit 3, a book data reading unit 4, a book data buffer 5, a book data analysis unit 6, an anchor information acquisition unit 7, An anchor information management unit 8, a representative image acquisition unit 9, a display mode management unit 10, a synthesis unit 11, a drawing unit 12, an output unit 13, and a display unit 14 are provided. Among these, the anchor information acquisition unit 7, the anchor information management unit 8, and the representative image acquisition unit 9 surrounded by a dotted line constitute an upper layer image acquisition unit 15 in the display mode by layer.

  The storage unit 1 includes an HDD and a semiconductor memory, and stores electronic book data (hereinafter referred to as “book data”). The reproduction control input processing unit 2 acquires user operation information for page turning means such as the page feed button 103, the page return button 104, or the touch panel 102, and other input means, and transmits the information to the overall control unit 3. More specifically, information such as whether or not the page feed button 103 and the page return button 104 are pressed, the pressing time, whether or not the touch panel 102 is touched, and the speed of the touch operation is acquired and transmitted to the overall control unit 3. In addition, the reproduction control input processing unit 2 notifies the overall control unit 3 that the display mode has been switched when the user performs a display mode switching operation from an input unit (not shown). Further, when an event due to another user operation occurs, the contents of the event are transmitted to the overall control unit 3.

  The overall control unit 3 is for overall control of each function of the electronic device 100. The overall control unit 3 receives information related to user operations from the reproduction control input processing unit 2, and sends the page data analysis unit 6 a page. Instructs generation of a page image necessary for turning. The overall control unit 3 has a function of switching between the normal display mode and the hierarchical display mode. Here, the trigger for switching is whether or not the page turning speed exceeds a predetermined threshold (in the case of automatic switching), or whether or not a switching operation from the user is received by an input means (not shown) (manual) This is a determination result in the case of switching.

  Then, the overall control unit 3 determines, for example, whether or not it is high-speed page turning based on the user operation information received from the reproduction control input processing unit 2, and determines that it is high-speed page turning; and When the display mode classified by hierarchy is selected by the user, the anchor information management unit 8 is instructed to acquire a representative image, and the display mode management unit 10 is switched to the display mode classified by hierarchy. Notice. Further, the overall control unit 3 receives the position (page number or the like) of the image displayed on the lower layer from the book data analysis unit 6 and transmits it to the anchor information management unit 8, and from the representative image acquisition unit 9, It has a function of receiving the position (page number or the like) of a representative image, which is an image displayed in the hierarchy, and transmitting it to the book data analysis unit 6.

  The book data reading unit 4 reads book data related to the electronic book selected by the user from an input unit (not shown) from the storage unit 1 and stores it in the book data buffer 5. The book data buffer 5 is composed of, for example, a semiconductor memory in order to read book data at high speed, and stores the book data read from the storage unit 1.

  The book data analysis unit 6 corresponds to an engine that reproduces book data. The book data analysis unit 6 analyzes various tags of the book data, layout information, and the like, and generates page data for displaying an electronic book by laying out characters and images based on the analysis result. The generated page data is passed to the drawing unit 12 via the synthesis unit 11. In addition, when the user performs an operation such as turning pages, the overall control unit 3 instructs the book data analysis unit 6 to generate page data. Then, the book data analysis unit 6 generates page data corresponding to the page to be displayed next, and passes the page data to the drawing unit 12 via the synthesis unit 11. For this reason, the book data analysis unit 6 manages the display position such as the page number, which is the position of the page to be displayed next or next. The current position of the display page is notified from the book data analysis unit 6 to the overall control unit 3.

  Further, when the user operation is performed on the representative image of the upper hierarchy displayed on the screen 101 in the display mode by hierarchy and the display of the representative image is updated, the page image of the lower hierarchy is linked. Therefore, the data book analysis unit 6, for example, the position information (for example, the first page) of the section corresponding to the updated representative image from the anchor information management unit 8 via the overall control unit 3, as will be described later. Page number). Then, the data book analysis unit 6 generates page data of the first page image corresponding to the updated representative image based on the update of the representative image, and passes the page data to the drawing unit 12 via the synthesis unit 11.

  The anchor information acquisition unit 7 has a function of acquiring anchor information from the book data held in the book data buffer 5. Here, the anchor information is information for determining a point (page number) where the content of a book such as an article or a sentence is switched in an electronic book. Corresponds to additionally linked information. Therefore, it can be said that the anchor information is information on a separation position where the representative image is switched. Specifically, the anchor information includes information representing the cover, information representing the table of contents, information representing the headings of articles and sentences, information obtained by analyzing the table of contents data, and the like in the book data. The anchor information acquisition unit 7 may acquire the anchor information from the book data collectively according to the data structure of the book data. Also, the anchor information acquisition unit 7 reproduces the book data, that is, sequentially acquires the anchor information by turning the pages. You may go. A specific acquisition method for acquiring the anchor information will be described later.

  Next, the anchor information management unit 8 receives the anchor information acquired by the anchor information acquisition unit 7 and acquires the position of the currently displayed page from the book data analysis unit 6 via the overall control unit 3. When the page image is updated by the page turning operation, a determination is made as to whether or not the display position of the updated new page, that is, the page to be displayed next, crosses the anchor (separation position). Judgment method is arbitrary, whether or not the section has changed before and after page turning, such as whether or not the previous and current display positions are the same section, anchor information is set on the page before and after page turning Any method that can determine whether the The section can be said to be between anchor information and anchor information. If the anchor information management unit 8 determines that the anchor straddles the anchor, the anchor information management unit 8 issues an instruction for acquiring the representative image from the book data buffer 5 to the representative image acquisition unit 9. Instruct to change the display of the area where the representative image is displayed.

  Here, the anchor information may be acquired collectively from the book data, or may be acquired sequentially. In the case of collective acquisition, the anchor information management unit 8 receives all the anchor information from the anchor information acquisition unit 7 at the start of reproduction of the book data, confirms which section the current display position is in when turning the page, It is determined whether or not the section is the same as the previous display position. In the case of sequential acquisition, the anchor information management unit 8 may sequentially receive necessary anchor information from the anchor information acquisition unit 7 in accordance with the reproduction and display of book data. Necessary anchor information is determined according to a method for determining whether or not the anchor (separation position) is crossed.

  Further, the anchor information management unit 8 performs a user operation on the representative image displayed on the screen 101 in the hierarchical display mode, and when the display of the representative image is updated, the newly displayed representative image is displayed. For example, the position information (page number, etc.) of the first page of the section corresponding to is provided to the book data analysis unit 6 via the overall control unit 3.

  Here, the acquisition method of anchor information is demonstrated based on the page structure and data structure of an electronic book. FIG. 4 is a diagram illustrating an example of a page configuration of an electronic book, and FIG. 5 is a diagram for explaining an example of a data structure of the electronic book. The page configuration of the electronic book shown in FIG. 4 is that the page P1 is a cover, the page P2 is a table of contents, the pages P3 to P9 are the first chapter, and the pages after the page P10 are the second chapter.

  FIG. 5A is a diagram for explaining an example of a data structure of an electronic book having the page configuration shown in FIG. 4. The electronic book includes image data 40 (jpg, png, etc.) of each page and management. As information, in addition to the image data of each page, the case where the display order 42 and the table of contents data of each page are included is shown. Here, the table of contents data includes a page number (display order 42) and a table of contents character string 43. Table 44 shows the file name 41 of the image data of each page, the display order 42, and the table of contents character string 43. Showing the relationship.

  In the case of the data structure shown in FIG. 5A, the anchor information acquisition unit 7 determines that the page having the table of contents character string 43 of the table of contents data managed separately from the image data 40 is a page having anchor information. , Information on pages having a table of contents character string is collectively acquired as anchor information and transferred to the anchor information management unit 8. In this case, the information passed as anchor information to the anchor information management unit 8 may be information on the table of contents character string and the corresponding page, but as information indicating the switching point of the contents of the electronic book, one information before each page. The data “1” may be passed as the anchor information when the content is different from the previous page, and the data “0” may be passed when the content is the same as the previous page.

  Next, FIG. 5B is a diagram for explaining another example of the data structure of the electronic book having the page structure shown in FIG. 4, and each piece of page data 50 in which the electronic book is composed of character information and an image. And the case where the management information 54 indicating the display order managed separately from each page data is shown. In this case, the anchor information acquisition unit 7 uses, as anchor information, a character string 51 surrounded by <table of contents> and </ table of contents>, which is a specific character string related to the table of contents, from the description of the page data. It may be obtained by analysis, or a description 52 or the like enclosed by a specific character string <h2> and </ h2> indicating a headline is searched as anchor information, and information on a page having the searched anchor information May be sent to the anchor information management unit 8 as anchor information. Furthermore, if there is a description 53 such as <a href=”./p3.html”> Down the Rabbit-Hole </a> in which a link to the jump destination is set, from this description The table of contents character string and page information may be acquired. In the case of the data structure shown in FIG. 5B, the anchor information may be sequentially acquired according to the reproduction display of the book data, and all the anchor information from the book data is displayed when the first page is displayed. May be obtained in a batch.

  Next, processing in the case of a data structure that does not have the concept of a page will be described. FIG. 6 is a diagram for explaining an example of correspondence between anchor information in electronic book data not having the concept of a page and a page on the display. 001.xml and 002.xml in FIG. The book data described in XML is shown, and page 1 to page 9 in FIG. 6B show a state in which the book data 001.xml and 002.xml are laid out for each page for display.

  In the case of a data structure that does not have the concept of a page, as described above, one screen is laid out and displayed as a page unit. When one file does not fit on one page, that is, when it does not fit on one screen, it is divided into a plurality of pages and displayed. In addition, when one file is displayed divided into a plurality of pages, it is necessary to specify not only the file name but also the position in the file. Therefore, the anchor information as a delimiter is the file name and the position in the file, for example, , How many bytes, how many characters, how many lines from the beginning of the file are used.

  Here, the position of the h1 tag <h1> is used as an anchor information acquisition target. When pages are turned in order from page 1, in page 1 → page2 → page3, the first character of page1 is the head of the first chapter, and the position of the h1 tag immediately before this first character indicates the anchor information. Since it is a position, anchor information exists in page1. Since there is no anchor information from the position of the anchor information of page 1 to the first character of page 3, there is no anchor information between these pages. Next, in page3 → page4, the anchor information at the head of the second chapter exists between the first character of page3 and the first character of page4. Therefore, when the page is turned from page 3 to page 4, the anchor is straddled.

  Furthermore, in page4 → page5, there is no anchor information in page4, but the first character of page5 is the head of Chapter 3, and the position immediately before this first character is the position indicated by the anchor information. Exists. Therefore, when the page is turned from page 4 to page 5, the anchor is straddled. In page turning from page 5 to page 6 to page 7, there is no anchor information from the position of the anchor information of page 5 to the first character of page 7, so there is no anchor information between the pages. In page7 → page8, since the first character of page8 is the first character of Chapter 4, anchor information exists in page8. Therefore, when the page is turned from page 7 to page 8, the anchor is straddled. Since page 8 includes the first characters of Chapter 4, Chapter 5, and Chapter 6, it includes three anchor information.

  The representative image corresponding to each page is, for example, a representative image in a section (between anchor information and anchor information) to which the first character of each page belongs. For example, page 3 is a representative image corresponding to the first chapter, and page 4 is a representative image corresponding to the second chapter. In the case of page 8, the representative image corresponds to Chapter 4, and in the case of page 9, the representative image corresponds to Chapter 6. Conversely, the page displayed when the representative image of each section is operated can be a page including the head of the section. That is, the page displayed when the representative image of the first chapter is designated is page1, the page is chapter 3 in the case of the second chapter, and page 8 is in all of the fourth, fifth, and sixth chapters.

  As described above, the anchor information and the displayed page can be associated with each other even for data having no page concept. If the location specified by the anchor information exists between the first character of the page and the first character of the next page when laying out as a page, the mapping method shown above Although it is assumed that there is a break between the next page and the anchor information exists on the page, it may be handled as a break between the page and the previous page.

  Returning to FIG. 3, the representative image acquisition unit 9 will be described. The representative image acquisition unit 9 receives a command from the anchor information management unit 8, acquires a representative image, and passes it to the synthesis unit 11. Here, the representative image acquisition unit 9 acquires a predetermined representative image from the book data buffer based on the anchor information and the display position (page number or the like). The anchor information and the display position are received from the anchor information management unit 8, but when the anchor information is acquired collectively, the anchor information may be received all at once for the first time, and the anchor information of the section necessary for each page turning You may receive only.

  When the anchor information is acquired sequentially, the necessary anchor information is received every time the page is turned. In this case, necessary anchor information varies depending on the method of acquiring the representative image. For example, when the largest illustration in the section is used as the representative image, information for determining the section is required. Therefore, at least two pieces of anchor information indicating the start of the section and next anchor information for determining the end of the section are required. One anchor information is required, but when the representative image is a reduced image of the first page of the section, only the first anchor information of the section is required. In any case, the anchor information management unit 8 passes the anchor information required by the representative image acquisition unit 9 to the representative image acquisition unit 9. In addition, in any case, the display position is received every time the page is turned. However, when the anchor information is acquired sequentially, the anchor information is changed in the case of a change in the display position included in the section that already holds the anchor information. There is no need to receive.

  In addition, when displaying a plurality of representative images in the hierarchical display mode, the front and rear representative images are also acquired as necessary. The representative image is acquired from the book data between the anchor information and the next anchor information (section). As representative images, use a reduced image of the first page of the section, use a characteristic page from the pages included in the section, select from headings and illustrations in the sentence, etc. Other methods may be used as long as they select one image. Further, the priority order of images to be selected as representative images may be determined in advance. As will be described later, when there is no instruction from the anchor information management unit 8, the representative image acquisition unit 9 does nothing.

  Upon receiving an instruction from the overall control unit 3, the display mode management unit 10 manages the display modes of the normal display mode and the hierarchical management mode, and in the hierarchical management mode, the book data analysis unit Is instructed to synthesize and output the page data from and the representative image data from the representative image acquisition unit.

  The synthesizing unit 11 performs a reduction process or the like necessary so that the page data transmitted from the book data analyzing unit 6 and the representative image data transmitted from the representative image acquiring unit 9 can be displayed on the screen 101. It has a function to synthesize and output as screen data. When there is an instruction from the anchor information management unit 8 when turning the page, the screen data of the area where the representative image is displayed is updated, and when there is no instruction, the representative image is displayed. The screen data of the area is not updated, and only the screen data of the area where the page image is displayed is updated. In the normal display mode, the page data transmitted from the book data analysis unit 6 is transferred to the drawing unit 12 as screen data as it is.

  The drawing unit 12 writes the screen data received from the synthesizing unit 11 in the back buffer having the same size as the frame buffer of the display unit 14. The output unit 13 writes the screen data written in the back buffer of the drawing unit 12 in the frame buffer of the display unit 14. Then, the screen data written in the frame buffer is displayed on the screen 101 of the display unit 14. Note that the writing to the back buffer and the frame buffer may target only the updated area of the screen data.

  Next, an example of a processing procedure in the electronic device according to the embodiment of the present invention will be described. 7A and 7B are flowcharts illustrating an example of a processing procedure in one configuration of the electronic device according to the embodiment of the present invention. A page turning event is performed on a page image that is an image displayed in a lower hierarchy. This is to explain the case where it is broken.

  The processing procedure shown in FIGS. 7A and 7B describes the case where the anchor information is collectively acquired from the book data. As anchor information management, the anchor information management unit 8 sets the anchor information and the anchor information. This is a case where the interval is managed as a section and the section to which the page to be displayed belongs is described. In the case where the anchor information is acquired collectively, for example, it is effective when the book data has the data structure shown in FIG. 5A, but it is also possible in the case of the data structure shown in FIG. In the following description, an area for displaying a page image created by the book data analysis unit 6 on the screen 101 is called a book data display area, and the representative image acquired by the representative image acquisition unit 9 is displayed. The area from is referred to as a representative image display area.

FIG. 8 is a diagram for explaining an example of the display area of the screen. In the normal display mode, almost the entire screen 101 is the book data display area 110 as shown in FIG. 8A. In the display mode by hierarchy, the screen 101 is divided into at least two areas, a book data display area 110 and a representative image display area 120, as shown in FIG. 8B. In this case, the book data display area 110 is a lower hierarchy display area, and the representative image display area 120 is an upper hierarchy display area. In the example shown in FIG. 8B, the area on the screen of the display area of the lower hierarchy is made larger than the area of the display area of the upper hierarchy. The area of the area may be changed by the user's operation, and the area of the display area of the hierarchy selected by the user may be increased.
In the example shown in FIG. 8B, there are two hierarchies in the display mode by hierarchy, but three or more hierarchies may be used as described later.

  Moving to FIG. 7A, first, when a user performs an operation of displaying and reproducing an electronic book from a predetermined input unit, the electronic device 100 receives a reproduction start instruction (step S101). At that time, the book data reading unit 4 reads out the book data of the electronic book designated by the user from the storage unit 1 and stores it in the book data buffer 5, and the anchor information acquisition unit 7 is stored in the book data buffer 5. The anchor information of the entire electronic book is acquired from the book data in a lump, and the acquired anchor information is passed to the anchor information management unit 8 (step S102).

  Next, the electronic device 100 performs a process of displaying the first page in steps S103 to S107. First, in step S <b> 103, page data for the book data display area corresponding to the page to be displayed first is generated, and the generated page data is passed to the synthesis unit 11. In step S104, the synthesizer 11 directly uses the page data received from the book data analyzer 6 as screen data. In step S <b> 105, the synthesizing unit 11 passes the screen data and update target area information, which is information about a display update target area on the screen, to the drawing unit 12. The update target area here is a full screen book data display area.

  Further, in step S106, the drawing unit 12 writes the image data of the area to be updated into the back buffer based on the screen data received from the synthesizing unit 11 and the information on the update target area, and updates the data in the back buffer. By doing so, the screen data to be displayed first and the information on the update target area are passed to the output unit 13. Next, the output unit 13 updates the display of the screen 101 by displaying the image data written in the back buffer in the frame buffer of the display unit 14 and displays the first page. (Step S107).

  After the first page is displayed on the screen 101, the process proceeds to step S108 and waits for an event such as page turning, display mode switching, or playback end, which is an operation from the user on the electronic book. Then, it is determined whether or not a playback end event has occurred (step S109). If a playback end event has occurred, the process proceeds to step S133, and the overall control unit 3 performs a playback end process for the electronic book data. Do.

  Next, if a playback end event has not occurred, the overall control unit 3 determines whether or not a display mode switching operation has been performed by the user (step S110). Whether or not the display mode switching operation has been performed is determined by whether or not the reproduction control input processing unit 2 has notified the overall control unit 3 that the user has performed a display mode switching operation. When the display mode switching operation is performed, the process proceeds to step S111, and the display mode management unit 10 selects either the normal display mode or the hierarchical display mode so that the display mode specified by the user operation is obtained. After switching the display mode to step S112, the process proceeds to step S112. If the overall control unit 3 determines in step S110 that the display mode switching operation has not been performed, the process proceeds to step S112.

  In step S112, it is determined whether or not a display update event, that is, a page turning operation has been performed on the page image. If there is a display update event, the process proceeds to step S113. If there is no display update event, the process moves to step S131, and the electronic device 100 waits for an event to occur.

  In step S113, the overall control unit 3 determines whether the page turning speed has exceeded a predetermined threshold. If the overall control unit 3 determines that the page turning speed has exceeded a predetermined threshold, the process proceeds to step S114. In step S114, the display mode management unit 10 receives the notification from the overall control unit 3, switches to the hierarchical display mode when the display mode is the normal display mode, and then proceeds to step S115. If the overall control unit 3 determines in step S113 that the page turning speed does not exceed the predetermined threshold, the process proceeds to step S115.

  In step S115, it is determined whether or not the display mode is the hierarchical display mode. If the hierarchical display mode is selected, the process proceeds to step S116. If the hierarchical display mode is not selected, the process proceeds to step S123. Here, the processing after step S116 is the processing in the hierarchical display mode, and the processing after step S123 is the processing in the normal display mode. First, the processing in the normal display mode after step S123 will be described.

  In step S123, the book data analysis unit 6 receives a notification that page turning has been performed from the overall control unit 3, and generates and generates page data for the book data display area corresponding to the page to be displayed next. Passed page data is passed to the synthesis unit 11. Next, in step S124, the synthesizing unit 11 uses the page data received from the book data analyzing unit 6 as it is as screen data. Subsequently, in step S <b> 125, the synthesizing unit 11 passes the screen data and update target area information, which is information on a display update target area, to the drawing unit 12. The update target area here is the entire screen. From step S125, the process proceeds to step S129, and the subsequent processing is performed.

  In step S116, which is the processing in the hierarchical display mode, the book data analysis unit 6 receives a notification that page turning has been performed from the overall control unit 3, and displays the book data corresponding to the page to be displayed next. The page data for the area is generated, and the generated page data is passed to the synthesis unit 11. Next, in step S <b> 117, the anchor information management unit 8 acquires the position of the page to be displayed next by page turning from the book data analysis unit 6 via the overall control unit 3. In step S118, the anchor information management unit 8 determines whether the position of the display page to be displayed next straddles the anchor.

  The anchor information management unit 8 manages between the anchor information and the anchor information as a section based on the anchor information received from the anchor information acquisition unit 7 in step S102, and manages which section the displayed page belongs to. doing. Then, by turning the page, it is determined whether or not the previous and current display positions are the same section or different, and if it is determined that the sections are different, that is, straddling the anchor, the process proceeds to step S119. If it is determined that the anchor is not crossed, the process proceeds to step S126.

  In the processing after step S119, the representative image, which is the image in the upper layer, is updated together with the page image, which is the image in the lower layer. First, in step S <b> 119, the representative image acquisition unit 9 acquires representative image data corresponding to anchor information designated from the anchor information management unit 8, and passes it to the synthesis unit 11. Here, when displaying the front and back representative images, the necessary number of representative images are acquired. Next, the synthesis unit 11 receives the page data transmitted from the book data analysis unit 6 and the representative image data transmitted from the representative image acquisition unit 9 (step S120).

  Furthermore, the composition unit 11 synthesizes the page data transmitted from the book data analysis unit 6 and the representative image data transmitted from the representative image acquisition unit 9 according to an instruction from the anchor information management unit 8 to generate screen data. Generate (step S121). Subsequently, the synthesizing unit 11 passes the generated screen data and update target area information, which is information on a display update target area on the screen, to the drawing unit 12 (step S122). In this case, the update target area is a full screen. From step S122, the process proceeds to step S129, and the subsequent processing is performed.

  In the processing after step S126, this corresponds to the case where the page turning does not extend over the anchor, so that only the page image which is an image in the lower hierarchy is updated. First, in step S <b> 126, the synthesis unit 11 receives page data transmitted from the book data analysis unit 6. Next, the synthesizing unit 11 does not update the image data in the representative image display area 120, updates the page data transmitted from the book data analysis unit 6 only to the book data display area 110, and displays screen data. Is generated (step S127). Subsequently, the synthesizing unit 11 passes the generated screen data and update target area information, which is information on a display update target area on the screen, to the drawing unit 12 (step S128). The update target area here is only the book data display area. From step S128, the process proceeds to step S129, and the subsequent processing is performed.

  In step S129, the drawing unit 12 writes only the image data of the region to be updated to the back buffer based on the screen data received from the synthesizing unit 11 and the information on the update target region, and updates the data in the back buffer. As a result, the screen data to be displayed next and the information on the update target area are passed to the output unit 13. Next, the output unit 13 updates the display of the screen 101 by writing the image data written in the back buffer to the frame buffer of the display unit 14 (step S130).

  From step S130, the process proceeds to step S131 to wait for an event such as page turning, display mode switching, or reproduction end, which is an operation from the user on the electronic book. Then, it is determined whether or not a playback end event has occurred (step S132). If a playback end event has occurred, the process proceeds to step S133, and the overall control unit 3 performs a playback end process for the electronic book data. If no playback end event has occurred, the process proceeds to step S110, and the subsequent processing is repeated.

  As described above, in the case of the device configuration example 1, the processing procedure for collectively acquiring anchor information has been described. When anchor information is sequentially acquired, the acquisition of anchor information in step S102 in FIG. 7 (B) may be performed after the process of step S117, and the acquisition of anchor information may be changed to acquire the anchor information before and after the display position instead of at once.

  Next, a processing procedure when an operation for changing the representative image is performed in the hierarchical display mode will be described. FIG. 9 is a flowchart illustrating another example of the processing procedure in one configuration of the electronic apparatus according to the embodiment of the invention.

  First, in the hierarchical display mode, the overall control unit 3 determines whether an operation for changing a representative image has been performed based on information related to a user operation from the reproduction control input processing unit 2 (step S201). . This operation can be determined by touching the representative image and performing a slide operation. If the operation for changing the representative image is not performed, the process proceeds to step S210 to wait for the next event.

  When an operation for changing the representative image is performed in step S201, the process proceeds to step S202, and the anchor information management unit 8 acquires the direction of change to the representative image from the overall control unit 3, and the representative to be displayed next. Specify the anchor information of the image. Furthermore, the representative image acquisition unit 9 acquires a representative image that is to be newly displayed by a user operation based on an instruction from the anchor information management unit 8 (step S203).

  Next, the book data analysis unit 6 acquires the position of the anchor information of the representative image to be displayed next from the anchor information management unit 8 via the overall control unit 3, and corresponds to the representative image to be displayed next. Image data for the book data display area in the section, for example, page data of the first page in the section is generated (step S204). The synthesizing unit 11 receives the representative image data from the representative image acquisition unit 9 and the page data from the book data analysis unit 6 (step S205). Further, the synthesizing unit 11 synthesizes the page data transmitted from the book data analyzing unit 6 and the representative image data transmitted from the representative image acquiring unit 9 to generate screen data (step S206).

  Next, the synthesizing unit 11 passes the generated screen data and update target area information, which is information on a display update target area on the screen, to the drawing unit 12 (step S207). The update target area here is the entire screen. After that, the drawing unit 12 writes only the image data of the region to be updated to the back buffer based on the screen data received from the synthesizing unit 11 and the update target region information, thereby updating the screen data to be displayed next. Information on the target area is passed to the output unit 13 (step S208). Then, the output unit 13 updates the display of the screen 101 by writing the data written in the back buffer to the frame buffer of the display unit 14 (step S209). After updating the display of the screen 101 in step S209, the process proceeds to step S210 and waits for the next event.

  As described above, in the device configuration example 1, the anchor information management unit 8 is provided to manage the anchor information of the electronic book. Therefore, when the page turning or the operation on the representative image is performed, the representative image, Alternatively, the timing for updating the page image can be managed, and the representative image and the page image can be acquired and the drawing can be updated only when necessary. For this reason, it is possible to reduce the amount of data processing.

(Device configuration example 2)
FIG. 10 is a diagram illustrating an example of another configuration of the electronic device according to the embodiment of the present invention, and illustrates a device configuration example 2. As shown in the figure, the electronic device 100 includes a storage unit 1, a reproduction control input processing unit 2, an overall control unit 3, a book data reading unit 4, a book data buffer 5, a book data analysis unit 6, and an anchor information acquisition unit 7 ′. A representative image acquisition unit 9 ′, a display mode management unit 10, a synthesis unit 11 ′, a drawing unit 12, an output unit 13, and a display unit 14. Among these, the anchor information acquisition unit 7 ′ and the representative image acquisition unit 9 ′ surrounded by a dotted line constitute the upper layer image acquisition unit 16 in the display mode by layer.

  The electronic device 100 of the device configuration example 2 is different from the electronic device 100 of the device configuration example 1 in that it does not have an anchor information management unit, but the storage unit 1, the reproduction control input processing unit 2, The overall control unit 3, the book data reading unit 4, the book data buffer 5, the book data analysis unit 6, the drawing unit 12, the output unit 13, and the display unit 14 have similar functions. Hereinafter, differences from the device configuration example 1 will be mainly described.

  The electronic device 100 according to the device configuration example 2 is the same as the device configuration example 1 in that the anchor information acquisition unit 7 ′ has a function of acquiring anchor information from the book data. The anchor information may be acquired collectively from the book data on the basis of the instruction from, or the anchor information may be sequentially acquired by reproducing the book data, that is, turning the pages. In the case of device configuration example 2, the acquired anchor information is transferred to the representative image acquisition unit 9 '.

  The representative image acquisition unit 9 of the device configuration example 1 acquires a representative image based on an instruction from the anchor information management unit 8, but the representative image acquisition unit 9 ′ of the device configuration example 1 acquires the anchor information. A corresponding representative image is acquired from the anchor information received from the section 7 ′ and the display page position (display position) of the book data received from the overall control section 3. Here, when the anchor information is acquired at once, the anchor information is received all at once for the first section of the book data, and the display position is received every time the page is turned. When the anchor information is acquired sequentially, the display position and the anchor information are received every time the page is turned, but the representative image acquisition means 9 ′ already holds the anchor information necessary for acquiring the representative image of the commanded display position. If so, there is no need to receive anchor information.

  For example, when multiple pages are included in the section between the anchor information and the anchor information, since the necessary anchor information is received when the representative image of the first page is acquired, when pages are turned in the section, Acquisition of anchor information is not necessary. Furthermore, it is also possible to hold a representative image acquired once according to page turning. In this case, for a plurality of pages included in the same section, the processing for acquiring the representative image itself is not necessary. It is to be noted that, in the case of displaying a plurality of representative images, the representative image acquisition unit 9 ′ acquires the front and rear representative images as necessary, similar to the device configuration example 1.

  In addition, the composition unit 11 of the device configuration example 1 generates image data by updating the screen data in the area where the representative image is displayed according to an instruction from the anchor information management unit 8. When the representative image is not changed from the previous data, the synthesizing unit 11 ′ of Example 2 generates image data using only the book data display area as a redrawing target area and passes the image data to the drawing unit 12.

  Next, an example of a processing procedure in another configuration example of the electronic device according to the device configuration example 2 will be described. 11A and 11B are flowcharts illustrating an example of a processing procedure in another configuration of the electronic device according to the embodiment of the present invention, which describes a case where anchor information is sequentially acquired from book data. Also, it is mainly for explaining a case where a page turning event is performed on a page image that is an image displayed in a lower hierarchy.

  First, electronic device 100 accepts a reproduction start instruction when a user performs an operation of displaying and reproducing an electronic book from a predetermined input unit (step S301). At that time, the book data reading unit 4 reads the book data of the electronic book designated by the user and stores it in the book data buffer 5.

  Next, the electronic device 100 performs a process of displaying the first page in steps S302 to S306. First, in step S302, page data for the book data display area corresponding to the page to be displayed first is generated, and the generated page data is passed to the combining unit 11 '. In step S303, the synthesis unit 11 'generates the page data received from the book data analysis unit 6 as it is as screen data. Thereafter, in step S <b> 304, the composition unit 11 ′ passes the generated screen data to the drawing unit 12.

  Next, the drawing unit 12 writes the screen data received from the synthesizing unit 11 ′ to the back buffer having the same size as the frame buffer of the display unit 14, thereby passing the screen data to be displayed next to the output unit 13 (Step S1). S305). Then, the output unit 13 updates the display of the screen 101 by writing the image data written in the back buffer to the frame buffer of the display unit 14 (step S306). Subsequently, the process proceeds to step S307 to wait for an event such as page turning, display mode switching, or reproduction end, which is an operation from the user on the electronic book. Then, it is determined whether or not a reproduction end event has occurred (step S308). If a reproduction end event has occurred, the process proceeds to step S328, and the overall control unit 3 performs a reproduction end process for the electronic book data. Do.

  Next, if a playback end event has not occurred, the process proceeds to step S309, and the overall control unit 3 determines whether or not a display mode switching operation has been performed by the user (step S309). When the display mode switching operation is performed, the process proceeds to step S310, and the display mode management unit 10 selects either the normal display mode or the hierarchical display mode so that the display mode specified by the user operation is obtained. After switching the display mode, the process proceeds to step S311. If the overall control unit 3 determines in step S309 that the display mode switching operation has not been performed, the process proceeds to step S311.

  In step S311, it is determined whether a display update event, i.e., a page turning operation has been performed on the page image. If there is a display update event, the process proceeds to step S312. If there is no display update event, the process proceeds to step S326, and the electronic device waits for an event to occur.

  In step S312, the overall control unit 3 determines whether the page turning speed has exceeded a predetermined threshold. If the overall control unit 3 determines that the page turning speed has exceeded a predetermined threshold, the process proceeds to step S313. In step S313, the display mode management unit 10 receives the notification from the overall control unit 3, switches the display mode from the normal display mode to the hierarchical display mode, and then proceeds to step S314. If the overall control unit 3 determines in step S312 that the page turning speed does not exceed the predetermined threshold, the process proceeds to step S314.

  In step S314, it is determined whether or not the display mode is the hierarchical display mode. If it is determined that the display mode is not the hierarchical display mode, the process proceeds to step S321. The processing after step S321 is processing in the normal display mode. In step S321, the book data analysis unit 6 receives notification from the overall control unit 3 that page turning has been performed, generates page data for the book data display area corresponding to the page to be displayed next, and generates the page data. Passed page data is passed to the synthesis unit 11 ′. Next, the synthesis unit 11 ′ generates the page data received from the book data analysis unit 6 as screen data as it is (step S <b> 322). When the process of step S322 is completed, the process proceeds to step S323, where the synthesizing unit 11 'passes the screen data to the drawing unit 12, and the subsequent processing is continued.

  Returning to step S314, if it is determined that the display mode is the hierarchical display mode, the process proceeds to step S315. The processing after step S315 is processing in the display mode by hierarchy. In step S315, the book data analysis unit 6 receives a notification that the page has been turned from the overall control unit 3, generates page data for the book data display area corresponding to the page to be displayed next, and generates the page data. Passed page data is passed to the synthesis unit 11 ′. Further, the anchor information acquisition unit 7 ′ and the representative image acquisition unit 9 ′ acquire information on the page position (display position) of the page image to be displayed next from the book data analysis unit 6 via the overall control unit 3. (Step S316).

  Next, the anchor information acquisition unit 7 ′ acquires anchor information before and after the page position of the currently displayed page image (step S <b> 317). Here, when displaying the front and back representative images, the anchor information at the positions before and after the required number is acquired. Note that if the position of the page to be displayed next does not exceed the break position related to the anchor information acquired last time, that is, in the same section as the previous display page, it is not necessary to acquire the anchor information again.

  Then, the representative image acquisition unit 9 ′ determines the page image to be displayed next from the book data buffer 5 based on the display position of the page image to be displayed next and the anchor information received from the anchor information acquisition unit 7 ′. A representative image corresponding to the page position is acquired (step S318). Here, when displaying the representative images before and after the representative image corresponding to the page position of the page image to be displayed next, the representative image acquisition unit 9 ′ anchors the anchor information at the necessary number of positions before and after. A representative image is acquired based on each received anchor information received from the information acquisition unit 7 ′.

  Next, the synthesis unit 11 ′ receives page data from the book data analysis unit 6 and representative image data from the representative image acquisition unit 9 ′ (step S <b> 319). Thereafter, the synthesizing unit 11 ′ synthesizes the page data received from the book data analyzing unit 6 and the representative image data received from the representative image acquiring unit 9 ′ to generate image data (Step S <b> 320). Here, when the representative image data is not changed from the previous representative image data, the synthesizing unit 11 ′ generates image data using only the book data display area as a redrawing target area. That is, only the page data received from the book data analysis unit 6 is updated to generate image data. Then, the synthesizing unit 11 'passes the generated image data to the drawing unit 12 (step S323).

  Next, the drawing unit 12 writes the screen data received from the synthesizing unit 11 ′ to the back buffer having the same size as the frame buffer of the display unit 14, thereby passing the screen data to be displayed next to the output unit 13 (Step S1). S324). Then, the output unit 13 updates the display of the screen 101 by writing the image data written in the back buffer to the frame buffer of the display unit 14 (step S325).

  From step S325, the process proceeds to step S326 to wait for an event such as page turning, display mode switching, or playback end, which is an operation on the electronic book by the user. Then, it is determined whether or not a playback end event has occurred (step S327). If a playback end event occurs, the process proceeds to step S328, and the overall control unit 3 performs a playback end process for the electronic book data. If no playback end event has occurred, the process moves to step S309, and the subsequent processing is repeated.

  As described above, in the case of the device configuration example 2, the processing procedure when the anchor information is sequentially acquired has been described. However, in the case where the anchor information is collectively acquired, instead of the processing in step S317 in FIG. After step S301 in (A), the anchor information acquisition unit 7 ′ may acquire the anchor information of the book data in a lump and pass it to the representative image acquisition unit 9 ′.

  Further, in the device configuration example 2, the processing procedure when the operation for changing the representative image is performed in the display mode by layer can realize display by layer in accordance with the procedure of FIG. 9 shown in the device configuration example 1. Therefore, the description is omitted. In this case, the representative image is acquired from the anchor information and the position of the display page.

  In this way, since the device configuration example 2 does not include an anchor information management unit, each time a page is turned with a page turning operation as a trigger, the representative image corresponding to the position of the display page to be displayed next is displayed. Acquisition is performed and passed to the synthesis unit 11 ′. Then, the synthesizing unit 11 ′ determines whether or not the sent representative image is different from the previous data, and updates the representative image display area when there is a change. As described above, in the device configuration example 2, since the representative image is acquired every time the displayed page is updated, the amount of data processing increases. However, the hierarchical display mode can be realized with a simple configuration. it can.

  FIG. 12 is a diagram for explaining another display example of the electronic book according to the present invention. In the display example shown in FIG. 12, in the display mode by hierarchy, the representative image display area 120 that is the display area of the image displayed on the upper hierarchy is the book data display area 110 that is the display area of the image displayed on the lower hierarchy. Is provided inside. Therefore, the representative image 23 that is an image displayed on the upper layer is displayed superimposed on the page image 21 displayed on the lower layer. Thereby, it is possible to display an image displayed on a lower layer without reducing the image.

  FIG. 13 is a diagram for explaining still another display example of the electronic book according to the present invention. The display example shown in FIG. 13 indicates that when the page is turned in the direction of arrow A, the display of the screen 101 is changed from the diagram shown on the left to the diagram shown on the right. In the display example shown in FIG. 13, in the hierarchical display mode, the screen 101 is divided into upper and lower parts of the book data display area 110 and the representative image display area 120, and the page image 22 reduced to the book data display area 110 is displayed. The representative image 23 is displayed in the representative image display area 120, and this point is the same as the display examples shown in FIGS. When the representative image P3-6 corresponds to the page image P6 from the page image P3 and the representative image P7-9 corresponds to the page image P9 from the page image P7, the outer periphery of the page image P3 to the page image P6 The margin portion 30 having the same color is displayed on the outer peripheral portion of the representative image P7-9.

  That is, the same color margin portion 30 is displayed on the outer periphery of the page image 22 displayed on the lower layer and the outer periphery of the representative image 23 displayed on the upper layer corresponding to the page image 22. As a result, even during page turning, the same color blank portion 30 provided in the page image 22 and the representative image 23 can be visually recognized, so that it is easy to grasp the correspondence between the two. In particular, as shown in the diagram on the right side of FIG. 13, since the switching between the page image P6 and the page image P7 can be easily grasped on the screen 101 when the representative image 23 is switched, in addition to the change of the representative image 23. It is possible to easily grasp the switching location of the contents of the electronic book.

  FIG. 14 is a diagram for explaining still another display example of the electronic book according to the present invention. In the display example shown in FIG. 14, when page turning is performed in the direction of arrow A, the display of the screen 101 moves from the diagram shown on the left to the diagram shown on the right through the diagram shown in the middle. Yes. 14, similarly to the display example shown in FIG. 13, the screen 101 is divided above and below the book data display area 110 and the representative image display area 120 in the hierarchical display mode, and the book data The reduced page image 22 is displayed in the display area 110, and the representative image 23 is displayed in the representative image display area 120.

  Here, when the representative image P3-6 corresponds to the page image P6 from the page image P3 and the representative image P7-9 corresponds to the page image P9 from the page image P7, in the display example illustrated in FIG. The page image 22 displayed in the display area 120 and the representative image 23 displayed in the representative image display area 120 are displayed so as to be connected by connecting lines 31 and 32.

  More specifically, among the pages corresponding to the representative image P3-6, the connecting line 31 is displayed between the page image P6 of the last page and the representative image P3-6, while corresponding to the representative image P7-9. The connecting line 32 is displayed between the page image P7 of the first page and the representative image P7-9 among the pages to be displayed. As a result, the page image P6 and the page image P7 can be easily switched on the screen 101 when the representative image 23 is switched. Therefore, in addition to the change of the representative image 23, the switching position of the contents of the electronic book can be easily performed. I can grasp it.

  As described above, the display examples illustrated in FIGS. 13 and 14 include information indicating the correspondence relationship between the image displayed in the lower hierarchy and the image displayed in the upper hierarchy corresponding to the image displayed in the lower hierarchy. In this example, the image is further displayed on the screen 101.

  FIG. 15 is a diagram for explaining still another display example of the electronic book according to the present invention. In the display example shown in FIG. 15, in the hierarchical display mode, in addition to the book data display area 110 and the representative image display area 120, a book title display area 130 indicating unique information of the electronic book is further provided. Is vertically divided into three parts. The reduced page image 22 is displayed in the book data display area 110, the representative image 23 is displayed in the representative image display area 120, and the cover image 24 of the electronic book is displayed in the book title display area 130.

  As described above, in the display mode for each hierarchy, the number of levels may be three or more. In the display example shown in FIG. 15, for example, when the page image 22 of the last page of the currently displayed electronic book (the electronic book “book B” in the figure) is page-turned, this page-turning operation is linked. Thus, the first representative image 23 of the next electronic book (the electronic book “book C” in the figure) and the cover image 24 of the next electronic book are changed in conjunction with each other. When a user operation is performed to change the cover image 24 displayed in the book title display area 130, the first page image 24 of the next electronic book displayed in conjunction with this operation, A representative image 23 is displayed.

  As described above, in the display example shown in FIG. 15, the image displayed on the top layer is the cover image of the electronic book, and can be used as an electronic book shelf in which a plurality of electronic books are arranged. The information indicating the unique information of the electronic book displayed on the top layer may be the author name, publisher name, and series name in addition to the cover image of the electronic book. Further, in the display mode by hierarchy, it may be configured such that the display at the second hierarchy and the display at the third hierarchy can be switched by a user operation. Furthermore, if the contents of the e-book are divided into “chapter”, which is a relatively large section, and “section”, which is a section smaller than the chapter, the image displayed in the lowest layer is the page image. The image displayed in the upper hierarchy may be an image related to “section”, and the image in the highest hierarchy may be an image related to “chapter”.

(Device configuration example 3)
FIG. 16 is a diagram illustrating an example of still another configuration of the electronic device according to the embodiment of the present invention, and illustrates a configuration example 3 of the device. The electronic device 100 according to the device configuration example 3 is for realizing the three-layer display mode according to the hierarchy shown in FIG. 15, and is higher than the device configuration example 1 shown in FIG. The other configuration is the same as that of the device configuration example 1 except that 17 is different. Therefore, in the following description, differences from the device configuration example 1 will be described.

  First, in the display example shown in FIG. 15, since the image displayed on the top layer is a cover image of an electronic book, when the user inputs playback control for the electronic book, the book data reading unit 4 A plurality of book data is read from the storage unit 1 and stored in the book data buffer. Then, the anchor information acquisition unit 15 acquires anchor information for each of the images displayed on the upper hierarchy for each of the plurality of electronic books stored in the book data buffer, and passes them to the anchor information management unit 8. In this case, the images displayed on the upper layer are two images, a representative image and a cover image.

Next, the device configuration example 3, the upper layer image acquiring unit 17 has two representative image acquisition unit of the first representative image acquiring unit 9 ₁ and the second representative image acquiring unit 9 _2. The first representative image acquiring unit 9 ₁ based on a command from the anchor information management unit 8 acquires the representative image 23 displayed on the representative image display area 120 shown in FIG. 15, the second representative image acquisition unit 9 ₂ acquires a cover image 24 displayed in the book title display area 130 shown in FIG. 15 based on a command from the anchor information management unit 8.

For this reason, the anchor information management unit 8 manages the anchor information acquired by the anchor information acquisition unit 7 for each higher hierarchy. And the anchor information management part 8 acquires the position of the page currently displayed from the book data analysis part 6 via the overall control part 3, and when the page image is updated by the user's page turning operation, position of the page to be newly displayed for each hierarchy perform determination whether across anchor, when it is determined that straddle the anchor, first representative image acquiring unit 9 _first or second representative image the acquired unit 9 _2, has issued a notice of acquiring the representative image.

  As described above, a plurality of display examples have been described as display examples in the hierarchical display mode. However, page images in a lower hierarchy may be displayed in a spread, and at that time, a representative image in a higher hierarchy is also displayed in a spread. May be. In this case, since the display area of one page becomes small, it is desirable to use the screen of the electronic device in a horizontally long state. In the display examples shown so far, the example in which the page is turned in the horizontal direction has been described. However, the page layout may be turned in the vertical direction by changing the display layout of the page image and the representative image.

  Furthermore, in the device configuration example 1 and the device configuration example 2, the anchor information is managed by the anchor information management unit 8 and the representative image is sequentially acquired. However, the representative image corresponding to each page or a plurality of pages is obtained in advance. A stored table may be created, and a representative image may be acquired from this table based on a page to be displayed next in conjunction with page turning.

  As described above, a plurality of device configuration examples have been described for the electronic device according to the embodiment of the present invention. However, a part or all of each component of the electronic device is typically an integrated circuit LSI (Large Scale Integration). May be implemented. Each component of the electronic device may be individually chipped, or a part or all of each component may be integrated into a chip. Further, the method of circuit integration is not limited to LSI, and may be realized with a dedicated circuit or a general-purpose processor. In addition, when an integrated circuit technology that replaces LSI appears due to progress in semiconductor technology, an integrated circuit based on the technology can also be used.

  Further, a program for realizing the functions described in the above embodiments is recorded on a computer-readable recording medium, and the program recorded on the recording medium is stored in a processor (CPU: Central Processing Unit, MPU: Micro Processing). Unit) and the like are executed and the program is executed, thereby realizing the functions of the electronic device according to the present embodiment and executing the display control method for the electronic book.

  The “computer system” herein may include hardware such as an OS (Operating System) and peripheral devices. Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW (World Wide Web) system is used.

Further, the present invention may be implemented as a form of a computer program for realizing the function of an electronic device or a form of a computer-readable recording medium on which the computer program is recorded.
Here, the “computer-readable recording medium” refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, and a CD-ROM, and a storage medium such as a hard disk built in the computer system. Furthermore, the “computer-readable recording medium” dynamically holds a program for a short time like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, a volatile memory in a computer system serving as a server or a client in that case, and a program that holds a program for a certain period of time are also included.

  Further, the program may be for realizing a part of the functions described above, and may be capable of realizing the functions described above in combination with a program already recorded in the computer system. .

DESCRIPTION OF SYMBOLS 1 ... Memory | storage part, 2 ... Playback control input process part, 3 ... Whole control part, 4 ... Book data reading part, 5 ... Book data buffer, 6 ... Book data analysis part, 7 ... Anchor information acquisition part, 8 ... Anchor information Management unit, 9 ... representative image acquisition unit, 10 ... display mode management unit, 11 ... composition unit, 12 ... drawing unit, 13 ... output unit, 14 ... display unit, 21, 22 ... page image, 23 ... representative image, 100 ... Electronic device 101 ... Screen 102 ... Touch panel 103 ... Page feed button 104 ... Page back button

Claims (20)

  An electronic apparatus for displaying an electronic book on a screen, wherein a display mode includes displaying the contents of the electronic book in at least two layers and changing the image with respect to an image displayed on any one of the layers. An electronic device having a hierarchical display mode in which an image displayed on another layer is changed in conjunction with an image displayed on any one of the layers.   In the hierarchical display mode, the image displayed in the lower hierarchy of the image displayed by the hierarchy is an image of the page of the electronic book, and the image displayed in the upper hierarchy of the image displayed by the hierarchy is the above The electronic device according to claim 1, wherein the electronic device is an image related to a page or a plurality of pages including the page.   The electronic apparatus according to claim 2, wherein the image displayed on the upper layer is a reduced image of the image displayed on the lower layer.   The electronic device according to claim 2, wherein the image displayed on the upper hierarchy is an image related to a heading of the image displayed on the lower hierarchy.   The electronic device according to claim 2, wherein the image displayed on the upper hierarchy is an image obtained by extracting a part of the image displayed on the lower hierarchy.   The electronic apparatus according to claim 2, wherein the electronic book has a table of contents, and the image displayed on the upper hierarchy is an image generated based on the table of contents.   The image displayed on the highest hierarchy among the images displayed on the upper hierarchy is a display of information unique to the electronic book. Electronics.   The electronic device according to claim 7, wherein the unique information of the electronic book includes at least one of a cover image, an author name, a publisher name, and a series name of the electronic book.   The electronic apparatus according to claim 2, wherein an image of the page of the electronic book is displayed in a spread.   10. The electronic device according to claim 2, wherein the image displayed for each hierarchy is an image displayed for each area obtained by dividing the screen. 11.   10. The electronic device according to claim 2, wherein an image displayed on the upper layer is displayed so as to be superimposed on an image displayed on the lower layer. 10.   12. The electronic apparatus according to claim 2, wherein the display area of each layer of the images displayed by layer can be changed by a user operation.   The information indicating the correspondence between the image displayed on the lower layer and the image displayed on the upper layer corresponding to the image displayed on the lower layer is further displayed. The electronic device of any one.   As information indicating the correspondence relationship, margin portions of the same color are provided on the outer peripheral portion of the image displayed on the lower layer and the outer peripheral portion of the image displayed on the upper layer corresponding to the image displayed on the lower layer. The electronic device according to claim 13, wherein the electronic device is displayed.   As the information indicating the correspondence relationship, when the image displayed on the upper layer is updated, the image displayed on the upper layer and the lower layer corresponding to the image displayed on the upper layer are displayed. 14. The electronic apparatus according to claim 13, wherein a connecting line is displayed between the image and the image.   16. The electronic apparatus according to claim 1, further comprising a normal display mode for displaying only an image of each page of the electronic book on the screen as the display mode.   The electronic apparatus according to claim 16, further comprising an operation input unit that receives a display mode switch from a user, wherein the normal display mode and the hierarchical display mode are switched according to an operation to the operation input unit. .   The image displayed on the lowest layer of the images displayed by layer is an image of the page of the electronic book, and has page turning means for accepting a page turning operation of the image of the page from the user. 18. The electronic apparatus according to claim 16, wherein when the turning operation is at a predetermined speed or more, the display mode is set to the display mode by hierarchy. A display control method for displaying an electronic book on a screen of an electronic device,
A layer-by-layer display step of displaying the contents of the electronic book on the screen in at least two layers;
A change operation accepting step for accepting an operation for changing the display of the image displayed on any one of the images displayed by the hierarchy;
A display control step of changing, when receiving the operation, an image displayed on another layer displayed by the layer in association with an image displayed on any one of the layers; Method.   A computer program for displaying an electronic book on a screen of an electronic device, wherein the computer executes the display control method according to claim 19.

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