JP2017027607A - Display format change system and electronic book terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it easy to browse an electronic book without causing trouble to a reader by reducing the useless stop and saccade of the reader's view point.SOLUTION: A display format change system 1 comprises: a view point detection unit 11 for detecting the view point of a reader in a display screen where electronic book data is displayed; a stop detection unit 12 for finding that the view point is stopped for more than a prescribed time at any place in the display screen; and a virtual character symbol number information string creation unit 14 for creating virtual character symbol number information strings 32 in which the line heads of lines accord with each other. On the basis of a signal from the stop detection unit 12, if the line head of a line where the view point stops of character symbol number information 30 does not accord with the line head of the next line, a display format change unit 15 changes the display format of the character symbol number information 30 on the basis of the virtual character information string 32.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a display form changing system for changing a display form so that a reader who browses an electronic book can easily read, and an electronic book terminal incorporating the display form changing system.

  In recent years, the electronic book market has been activated along with market demands and higher functionality and lower prices of electronic components. Electronic books have the great advantage of being able to carry many books without being bulky and easily browse them anytime and anywhere. A user can start an electronic book viewer on various electronic book terminals such as a portable device or a PC that matches the data format of the electronic book, and can browse any electronic book regardless of location and time.

  As described above, since the electronic book is easy to carry, there are more opportunities to browse in an environment with much disturbance than when browsing an actual book. However, when browsing an e-book while walking or in a vehicle, the hand holding the e-book terminal is shaken, or the human gaze is more likely to deviate from the e-book terminal, so the distance between the eyes and the display screen varies. .

  In addition, electronic books are often viewed not only indoors but also outdoors, and the brightness of the surroundings changes greatly. The type of illumination light source can also be read under various light sources such as sunlight, fluorescent lamps, and incandescent lamps that have different loads on the eyes. In addition, depending on the type of electronic book terminal and the lifestyle of each user, there are various ways to browse, such as when browsing while sitting, browsing while standing, browsing when lying down, browsing quickly, or reading carefully. It is.

  For paper books, the printing mode of characters in each page is fixed and cannot be changed. For example, even when a person with weak eyesight reads, the size of the character cannot be changed. Until now, readers themselves have created an “environment that makes it easy to read characters printed on paper” because of the physical constraints of paper books. For example, it is not possible to read in the dark. For example, a reading light is provided to brighten the room, or characters are too small to read and glasses are put on.

  In contrast, e-books can essentially change the arrangement of characters, and general viewers have standard changes in display form such as character enlargement / reduction and background color change. .

  However, most current electronic book character layouts reproduce a typesetting of a completed paper book. In other words, even though the text size and background color can be changed, it is often the case that the text layout of the e-book itself cannot be changed intentionally, and the typesetting was based on the premise that the text layout can be changed dynamically. This technology is still developing.

JP 2009-301206 A

http://www.sokudoku.gr.jp/rapid/outline/

  Generally, human vision feels that all characters in the visual field are in focus as shown in FIG. 8, but in reality, only the central part of the visual field, called the fovea, has a high resolution. The resolution is low in the peripheral so-called peripheral visual field, and most of the peripheral visual field is visually recognized as shown in the figure. What is important here is that the high-resolution fovea has a narrow range, and the character cannot be recognized as a “character” in the peripheral vision with a low resolution. Therefore, in order to “read” a character, it is necessary to hit the character that wants to read the fovea.

  FIG. 5 is a diagram illustrating the viewpoint tracking result described in Non-Patent Document 1. The hatched portion in FIG. 5 is a place where the reader has not moved the fovea for a certain period of time, and this operation is referred to as “stop” in this specification. In addition, the movement from one stop location to the next stop location is referred to as a saccade in this specification. Readers can see that they are repeatedly stopping and saccade while reading.

  The important point here is that the human perspective is not "not all characters". This is because some humans recognize characters as characters during reading, distinguish between characters that should be recognized by some algorithm of the brain and characters that can be skipped, and characters that are skipped are also in the brain. Means that In other words, considering the efficiency of reading, characters that can be complemented by the brain should be skipped, and unnecessary stops and saccades should be suppressed as much as possible.

  FIG. 10 shows the reader's behavior during the stoppage. The reader is simultaneously performing (1) character recognition in the fovea and (2) searching for a place to move the fovea in the peripheral field of view (saccade destination search) while stationary. . This means that if a saccade destination cannot be found at a single stop, there will be many useless saccades where the target destination is searched little by little while placing the fovea on a character that does not need to be recognized. means.

  FIG. 11 shows an example in which wasteful saccades tend to occur frequently. In general documents, “line feed” is introduced in order to place characters on a limited page, and the character string is divided and dropped on the page. At this line break, it is necessary to jump the viewpoint from the end of the line to the beginning of the next line. That is, the reader first needs to recognize the “end of line” in the fovea, and then search for the “start of line” in the next line in the peripheral field of view and saccade to align the fovea with the start of the line. If the beginning of the line is not captured when the fovea is placed at the end of the line, there will be many useless saccades to find the line.

  Unlike electronic books, e-book readers can change the display format of text information and image information within each page relatively freely. In order to suppress this, the display form of character information and image information in each page is not changed.

  Patent Document 1 discloses a technique for suppressing the movement of the user's line of sight, but does not detect the user's viewpoint, and assumes that the user's viewpoint is placed at a specific position in the display screen. Therefore, even if the technique disclosed in Patent Document 1 is used, the above-described unauthorized stopping and saccade of the viewpoint cannot be suppressed.

  The present invention has been made to solve the above-mentioned problems, and is a viewpoint guidance that makes it easy to browse an electronic book without bothering the reader's hand by suppressing wasteful stopping and saccade of the reader's viewpoint. An apparatus and an electronic book terminal are provided.

  The present invention includes a viewpoint detection unit that detects a reader's viewpoint in a display screen that displays electronic book data, and a stop detection unit that detects that the viewpoint has stopped at an arbitrary location in the display screen for a predetermined time or more. A virtual character-symbol-number information string creating unit that creates a virtual character-symbol-number information string such that the heads of each line match based on the character-symbol-number information arranged over a plurality of lines included in the electronic book data; Based on the signal from the stop detection unit, the virtual character symbol created by the virtual character symbol / numerical information sequence creation unit when the head of the first row where the viewpoint stops and the head of the next row do not match A display form changing system comprising: a display form changing unit for changing a display form of the character / symbol / numeric information based on a numerical information string.

  The present invention provides a communication unit capable of performing wireless communication between a display device and a server, an input unit for a reader to input various information, and displays electronic book data on a display screen of the display device. A display control unit; and a display form change system, wherein the display form change system detects a reader's viewpoint in the display screen of the display device, and the viewpoint is an arbitrary one in the display screen. A virtual character symbol number that matches the beginning of each line based on the stationary detection unit that detects that it has stopped at a place for more than a predetermined time and the character symbol number information arranged over multiple lines included in the electronic book data Based on the signal from the virtual character / symbol / numeric information string creating unit that creates the information string, and the signal from the stop detecting unit, when the head of one line where the viewpoint stops and the head of the next line do not match, Number of virtual character symbols Based on the virtual character symbol numerical information columns created by the information sequence creation unit, and a display mode changing unit for changing the display form of the character symbol numerical information, an electronic book terminal, characterized in that it comprises a.

  According to the present invention, wasteful stopping and saccade from the reader's viewpoint can be suppressed, so that it is possible to easily browse an electronic book without bothering the reader.

FIG. 1 is a block diagram showing a schematic configuration of an electronic book terminal 2 incorporating a display form changing system 1 according to an embodiment of the present invention. FIG. 2 is a flowchart showing the processing operation of the electronic book terminal 2 of FIG. FIG. 3 is a diagram illustrating an example of character symbol number information in electronic book data. FIG. 4 is a diagram showing a virtual character symbol / numeral information string. 5A and 5B are diagrams showing the flow of character strings. 6A and 6B are diagrams showing rendering by the display form changing unit. FIGS. 7A and 7B are views showing a state in which the character / symbol / numeral information is moved upward by one line. FIG. 8 is a diagram illustrating an example of a human visual field. FIG. 9 is a diagram showing a viewpoint tracking result described in Non-Patent Document 1. FIG. 10 is a diagram showing the behavior of the reader when it is stopped. FIG. 11 is a diagram showing an example in which wasteful saccades tend to occur frequently.

  Hereinafter, embodiments of the present invention will be described in detail. FIG. 1 is a block diagram showing a schematic configuration of an electronic book terminal 2 incorporating a viewpoint guidance device 1 according to an embodiment of the present invention.

  When the electronic book terminal 2 in FIG. 1 is turned on, the electronic book data is updated by periodically communicating with the server 20 without being conscious of the user. It is also possible to communicate with the server 20 under the user's instruction to download or delete new electronic book data.

  The electronic book terminal 2 in FIG. 1 may be a dedicated terminal specialized for browsing electronic books, or may execute various application software (hereinafter referred to as applications) on a general-purpose OS (operating system). It may be an electronic device such as a PC, tablet, or smartphone. When an electronic device operating on a general-purpose OS is used as the electronic book terminal 2, an application that realizes the function of the electronic book viewer is started on the OS. When a PC is used as the electronic book terminal 2, the PC may be a portable PC or a stationary PC. Thus, the electronic book terminal 2 is not necessarily a portable electronic device.

  The electronic book terminal 2 of FIG. 1 includes a display device 3, a display control unit 4 that generates information to be displayed on the display screen of the display device 3, a sensor 5 that can be used to detect a reader's viewpoint, and a server 20. A communication unit 6 for performing wireless communication, an input unit 7 for a user to input various information, an operation analysis unit 8 for analyzing user input information based on information input to the input unit 7, and an electronic The electronic book storage part 9 which memorize | stores book data, the main controller 10 which controls each part in the electronic book terminal 2, and the display form change system 1 are provided.

  The main controller 10 performs control to communicate with the server 20 via the communication unit 6, control to transmit an output signal from the sensor 5 to the display form change system 1, and based on an output signal from the display form change system 1. Processing for instructing the display control unit 4 to change the display screen is performed.

  The display form change system 1 includes a viewpoint detection unit 11, a stop detection unit 12, an electronic book meta information storage unit 13, a virtual character symbol / numeral information creation unit 14, and a display form change unit 15.

  The viewpoint detection unit 11 detects the viewpoint of the user (hereinafter referred to as a reader) in the display screen based on the output signal of the sensor 5.

  The stop detection unit 12 detects that the reader's viewpoint has stopped at an arbitrary place in the display screen for a predetermined time or more. Since the general human character recognition time is said to be about 0.2 to 0.3 seconds, the above-mentioned predetermined time is also set to about 0.2 to 0.3 seconds, for example.

  The electronic book meta information storage unit 13 stores meta information attached to electronic book data including character / symbol / numeric information and image information. The meta information includes various setting information for displaying the electronic book data, for example, the number of characters in the display screen, the number of lines, the font size, the font type, and character decoration information.

  Here, the character / symbol / numeric information included in the electronic book data refers to arbitrary characters, symbols, and numbers that can be displayed on the electronic book terminal 2, and refers to information that is converted into a general-purpose code such as an ASCII code. On the other hand, image information refers to information in various image formats that are not general-purpose coded, such as diagrams, tables, graphs, photographs, and illustrations.

  In the initial state, the server 20 performs linguistic analysis of electronic book data using a known algorithm, and identifies and identifies character / numeric information and image information that a general reader is expected to put a viewpoint on for a predetermined time or more. Each piece of information is stored in the electronic book meta information storage unit 13 as a stop location candidate. In selecting a stop location candidate, not only the above-mentioned method by language analysis, but also a specific word (for example, a conjunction) is unconditionally selected as a stop location candidate, and repeated character strings and paragraphs are excluded from the stop location candidates. Arbitrary methods can be adopted, such as referring to the past history of individual readers, or changing the selection method of the stop location candidates according to the age and sex of the readers.

  The electronic book meta information storage unit 13 is connected to the virtual character / symbol / numeric information string creation unit 14 as described above.

  Generally, the character symbol number information 30 included in the electronic book data is arranged over a plurality of lines (see FIG. 3). The virtual character / symbol / numeric information string creating unit 14 creates a virtual character / symbol / numerical information string 32 such that the heads of the respective lines coincide with each other based on the character / symbol / numeric information 30 included in the electronic book data.

  Here, “the head of each line matches” includes both the case where the head of each line completely matches and the case where the head of each line substantially matches by a line feed.

  Further, the display form changing unit 15 determines whether the head of one line where the viewpoint stops and the line of the next line do not match based on signals from the stop detection unit 12 and the electronic book meta information storage unit 13. The display form of the character / symbol / numeric information 30 is changed based on the virtual character / symbol / numeric information string 32 from the character / symbol / numeric information string creating unit 14.

  Next, the operation of the present embodiment having such a configuration will be described with reference to FIGS.

  FIG. 2 is a flowchart showing the processing operation of the electronic book terminal 2 of FIG. This flowchart is started when the electronic book terminal 2 is turned on and the reader activates the electronic terminal viewer. While the electronic terminal viewer is activated, the sensor 5 continuously tracks the reader's viewpoint and detects the viewpoint. Various known methods are known as the method for detecting the viewpoint, and any method may be used.

  For example, in the corneal reflection method, the position of the viewpoint is detected using the difference in reflectance between the black eye and the white eye of the human eyeball. The sensor 5 used in the corneal reflection method has a light emitting element and a light receiving element, irradiates infrared light from the light emitting element to the reader's eyeball, and receives light reflected from the eyeball by the light receiving element. The black eye of the eyeball has a low reflectance, and the white eye has a high reflectance. For this reason, if two light receiving elements are provided in the horizontal (left and right) direction, when the black eye moves to the right light receiving element, the amount of reflected light received by the right light receiving element is the reflected light received by the left light receiving element. Less than the amount of light. Thereby, the movement of the eyeball in the left-right direction can be detected. Also, even when the eyeball moves up and down, the sum of the amount of reflected light of the two left and right light receiving elements increases or decreases due to the height difference between the light emitting element and the eyeball. It is possible to detect whether the eyeball has moved up or down.

  Using such a viewpoint detection mechanism, first, reflected light from the reader's eyeball is received by the two light receiving elements in the sensor 5 (step S1), and the eyeball moves up, down, left, and right according to the amount of received light. And the viewpoint position in the reader's display screen is detected from the detection result (step S2). More specifically, the viewpoint position is detected by specifying a coordinate position in the display screen of the display device 3.

  If the viewpoint detection method changes, the processing contents of steps S1 and S2 described above may also change. However, in the present embodiment, it is assumed that viewpoint detection is performed using a known method. The description of the viewpoint detection processing procedure by means of is omitted.

  In parallel with the viewpoint position detection process using the sensor 5, an electronic book display process by the electronic book viewer and a display form change process by the display form change system 1 are performed. The electronic book display process and the display form change process are also continuously performed while the electronic book viewer is activated. The electronic book display process is a process performed by the main controller 10, whereas the display form change process is a process performed by the display form change system 1.

  In the electronic book display process, the electronic book data stored in the electronic book storage unit 9 and the attached information of the electronic book data stored in the electronic book meta information storage unit 13 are read (step S11). Based on this, the electronic book is displayed on the display device 3 (step S12).

  As described above, the electronic book data is composed of character / numeric information and image information. In the character / symbol / numeric information, the display form (font type, font size, presence / absence of highlighting, etc.) can be set and changed, and the display form (size etc.) of the image information can be changed. The setting information of the display form of the character symbol number information and the image information is described in the meta information stored in the electronic book meta information storage unit 13. Therefore, in step S12 described above, the display form of the character / numeric information and the image information in the electronic book data is set based on the meta information and displayed on the display device 3.

  When the reader's viewpoint is detected in step S2 while the electronic book data is being displayed on the display device 3, the display form changing process is activated. In the display form change processing, first, based on the detection result of the viewpoint by the viewpoint detection unit 11, the coordinate position in the display screen corresponding to the current viewpoint is specified, and the character / numeric information or image existing at the coordinate position is specified. Information is specified (step S13).

  Next, the stop detection unit 12 determines whether the viewpoint has stopped at the current position for a predetermined time or more (step S14). If the viewpoint has moved to the current position without stopping for a predetermined time or longer, the process returns to step S13.

  If the viewpoint stops at the current position for a predetermined time or longer, that position is regarded as the current stop position.

  Next, the display form changing unit 15 determines whether or not the beginning of the first row where the viewpoint stops and the beginning of the next row are inconsistent based on the signals from the stop detection unit 12 and the electronic book meta information storage unit 13. . Then, the display form changing unit 15 is based on the virtual character / symbol / numerical information sequence 32 created in the virtual character / symbol / numerical information sequence creating unit 14 when the head of one line where the viewpoint is stopped does not match the beginning of the next line. Thus, the display form of the character symbol number information 30 is changed.

  Hereinafter, operations in the virtual character / symbol / numerical information string creating unit 14 and the display form changing unit 15 will be described in detail.

  First, the virtual character / symbol / numerical information creation unit 14 creates a virtual character / symbol / numerical information sequence 32 in advance based on the character / symbol / numeric information 30 in the electronic book data from the electronic book meta-information storage unit 13.

  That is, the character symbol number information 30 in the electronic book data is generally arranged over a plurality of lines (see FIG. 3). In FIG. 3, the upper character / numeric information 30a is composed of upper character / numeric information 30a, suspended character / numeric information 30b, and lower character / numeric information 30c. The beginning of the line, the beginning of the middle character / numeric information 30b, and the lower character / numeric information 30c do not match.

  Therefore, the virtual character / symbol / numeric information string creating unit 14 creates a virtual character / symbol / numeric information string 32 in which the heads of the respective lines coincide (see FIG. 4).

  As shown in FIG. 4, in the virtual character / symbol / numerical information string 32, the heads of all the lines coincide with each other as compared with the character / symbol / numeric information 30 in the electronic book data.

  Here, the flow of the character string will be described with reference to FIGS.

  5A shows the flow of the character string of the character / symbol / numeric information 30 in the electronic book data, and FIG. 5 (b) shows the flow of the character string of the virtual character / symbol / numeric information string 32.

  In FIG. 5A, the viewpoint movement route from the end of the last line of the upper character / numeric information 30a to the beginning of the next line, that is, the first line of the middle character / numeric information 30b is the upper line. Unlike the viewpoint movement route from the end of one line to the beginning of the next line in the character symbol number information 30a. Thus, when the viewpoint movement route from the end of one line to the beginning of the next line becomes long, a useless saccade that searches for the beginning of the next line occurs.

  On the other hand, in the character string of the virtual character / symbol / numeric information string 32 shown in FIG. 5B, since the heads of the respective lines match, the viewpoint movement route from the end of each line to the beginning of the next line is It will be the same. Therefore, in each line, the beginning of the next line can be easily searched from the end of the line, and useless saccades can be eliminated.

  In the present invention, the display form changing unit 15 changes the display form of the character / symbol / numeric information 30 using the virtual character / symbol / numeric information string 32 described above.

  Specifically, as shown in FIGS. 6A and 6B, the display form changing unit 15 includes all upper, middle, and lower character / symbol information 30a, 30b, and 30c among the character / symbol / number information 30. Is changed to the same position as the virtual character / symbol / numerical information string 32, that is, in the horizontal center of the display screen 3 </ b> A of the display device 3.

  For example, as shown in FIG. 6A, the display form changing unit 15 reads the upper character / symbol / numeric information 30a so that the upper character / numeric information 30a is at the center in the horizontal direction of the display screen 3A. The display form of the character symbol number information 30 is changed.

  Next, when the viewpoint moves to the last line of the upper character / symbol / numeric information 30a, the display form changing unit 15 determines the upper character / numeric information 30a based on the signals from the stop detection unit 12 and the electronic book meta information storage unit 13. Is determined to be inconsistent with the beginning of the first line of the next middle character / numeric information 30b.

  Here, a method for determining the coincidence and inconsistency of line heads will be described.

  For example, as a result of rendering a character string on the display screen 3 </ b> A, each character and coordinates (x, y coordinates) corresponding to each character are calculated and stored in the memory of the main controller 10.

  Then, based on each character and the corresponding coordinates, match or mismatch of the beginning of the line is determined.

Specifically, the text <p> the textbook <p> from the e-book's meta information </ p> is inserted, and the arrangement of the rendered strings is
Let's say that it is Suseso.

In this case, each character has a corresponding coordinate as follows.
Oh (x, y) = (1, 1)
(X, y) = (2,1)
...
(X, y) = (6,1)
(X, y) = (1,2)
...
(X, y) = (6, 2)
(X, y) = (4,3)

  The position of the viewpoint obtained by the stop detection unit 12 is also specified on the coordinates.

  For example, when the viewpoint comes to the position of “ka” on the coordinates, the beginning of the line “ka” (1, 1) and the beginning of the next line “ki” (1, 2) are the beginning of the line on the coordinates. Are determined to match.

  Next, when the viewpoint reaches the position of “shi” on the coordinates, the beginning of the “shi” line “ki” (1, 2) and the beginning of the next line “su” (4, 3) are on the coordinates. Is determined to be inconsistent.

  When it is determined that the beginning of the last line of the upper character / numeric information 30a and the first line of the middle character / numeric information 30b do not match, the display form changing unit 15 displays the character / numeric information. 30 is moved to the right in the display screen 3A as a whole, and the middle character / numeric information 30b is brought to the horizontal center of the display screen 3A in accordance with the virtual character / numeric information string 32 (see FIG. 6B). ). Here, FIGS. 6A and 6B are diagrams showing rendering on the display screen 3A by the display form changing unit 15. FIG.

  In this case, when the stop detection unit 12 determines that the viewpoint has stopped at the end of the last line of the upper character / numeric information 30a, the display form changing unit 15 displays the character / numeric information 30 as a whole in the display screen 3A. It is preferable to move to the right.

  As described above, the moving direction (horizontal direction) of the character / symbol / numeric information 30 in the display screen 3A by the display form changing unit 15 matches the arrangement direction (horizontal direction) of the character / symbol / numeric information.

  As described above, according to the present embodiment, when the head of the line where the viewpoint is stopped and the head of the next line do not match, based on the virtual character symbol number information sequence created in advance and the head of each line matches. Since the display form of the character / symbol / numeric information is changed, the viewpoint movement route from the end of one line to the beginning of the next line can be always made the same, and useless saccades can be eliminated.

  As shown in FIGS. 7A and 7B, the display form changing unit 15 stops the viewpoint at the end of the uppermost line in the display screen 3A based on the signal from the stop detection unit 12. (See FIG. 7A), the character / numeric information 30 as a whole may be moved upward by one and the next line may be moved to the uppermost line (see FIG. 7B). ).

  In this way, by moving the character / symbol / numeral information 30 upward as a whole, the character / symbol / numerical information 30 can be easily read by simply moving the viewpoint in the left-right direction at the top in the display screen 3A.

  Note that at least a part of the display form changing system 1 and the electronic book terminal 2 described in the above-described embodiment may be configured by hardware or software. When configured by software, a program for realizing at least a part of the functions of the viewpoint guidance device 1 and the electronic book terminal 2 is stored in a recording medium such as a flexible disk or a CD-ROM, and is read and executed by a computer. Also good. The recording medium is not limited to a removable medium such as a magnetic disk or an optical disk, but may be a fixed recording medium such as a hard disk device or a memory.

  Moreover, you may distribute the program which implement | achieves at least one part function of the display form change system 1 and the electronic book terminal 2 via communication lines (including wireless communication), such as the internet. Further, the program may be distributed in a state where the program is encrypted, modulated or compressed, and stored in a recording medium via a wired line such as the Internet or a wireless line.

  The aspect of the present invention is not limited to the individual embodiments described above, and includes various modifications that can be conceived by those skilled in the art, and the effects of the present invention are not limited to the contents described above. That is, various additions, modifications, and partial deletions can be made without departing from the concept and spirit of the present invention derived from the contents defined in the claims and equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Display form change system 2 Electronic book terminal 3 Display apparatus 4 Display control part 5 Sensor 6 Communication part 7 Input part 8 Operation analysis part 9 Electronic book memory | storage part 10 Main controller 11 View point detection part 12 Stop detection part 13 Electronic book meta information storage Unit 14 virtual character symbol number information creation unit 15 display form change unit 20 server 30 character symbol number information 30a upper character symbol number information 30b middle character symbol number information 30c lower character symbol number information 32 virtual character symbol number information string

Claims (10)

A viewpoint detection unit for detecting a reader's viewpoint in a display screen for displaying electronic book data; a stop detection unit for detecting that the viewpoint has stopped at an arbitrary place in the display screen for a predetermined time; and
A virtual character-symbol-number information string creating unit that creates a virtual character-symbol-number information string such that the beginning of each line matches, based on the character-symbol-number information arranged over a plurality of lines included in the electronic book data;
Based on the signal from the stop detection unit, the virtual character symbol created by the virtual character symbol / numerical information sequence creation unit when the head of the first row where the viewpoint stops and the head of the next row do not match A display form changing system comprising: a display form changing unit that changes a display form of the character / symbol / numeric information based on a numerical information string.   The display form changing system according to claim 1, wherein the display form changing unit moves the character / symbol / numeric information in the arrangement direction of each row according to the virtual character / symbol / numeric information string.   3. The display form changing system according to claim 2, wherein the display form changing unit moves the character / symbol / numeric information in a horizontal direction in accordance with the virtual character / symbol / numeric information string.   The display form changing unit changes the display form of the character / symbol / numeric information based on a virtual character / symbol / numerical information sequence when the viewpoint comes to the end of one line based on a signal from the stop detection unit. The display form changing system according to claim 1, wherein   The display according to claim 1, wherein when the viewpoint comes to the end of one line, the display form changing unit moves the next line to the one line based on a signal from the stop detection unit. Form change system. A display device;
A communication unit capable of wireless communication with the server;
An input section for the reader to input various information;
A display control unit for displaying electronic book data on the display screen of the display device;
A display form changing system,
The display form changing system includes:
A viewpoint detector for detecting the viewpoint of the reader in the display screen of the display device;
A stop detection unit that detects that the viewpoint has stopped at an arbitrary place in the display screen for a predetermined time or more;
A virtual character-symbol-number information string creating unit that creates a virtual character-symbol-number information string such that the beginning of each line matches, based on the character-symbol-number information arranged over a plurality of lines included in the electronic book data;
Based on the signal from the stop detection unit, the virtual character symbol created by the virtual character symbol / numerical information sequence creation unit when the head of the first row where the viewpoint stops and the head of the next row do not match An electronic book terminal comprising: a display form changing unit that changes a display form of the character / symbol / numeric information based on a numerical information string.   7. The electronic book terminal according to claim 6, wherein the display form changing unit moves the character / symbol / numeric information in the arrangement direction of each row in accordance with the virtual character / symbol / numeric information string.   8. The electronic book terminal according to claim 7, wherein the display form changing unit moves the character / symbol / numeric information in the horizontal direction in accordance with the virtual character / symbol / numeric information string.   The display form changing unit changes the display form of the character / symbol / numeric information based on a virtual character / symbol / numerical information sequence when the viewpoint comes to the end of one line based on a signal from the stop detection unit. The electronic book terminal according to claim 6.   7. The electronic apparatus according to claim 6, wherein the display form changing unit moves the next line to the one line when the viewpoint comes to the end of the line based on the signal from the stop detection unit. Book terminal.