KR20130126019A - User terminal apparatus and control method thereof - Google Patents

Abstract

A control method of a user terminal device is disclosed. The present control method includes a step for displaying a plurality of pages corresponding to each electronic book on one screen; a step for linking the page selected due to the control of a user among the displayed pages; and a step for displaying an identifier indicating a link between the selected pages on each linked page. [Reference numerals] (110) Display unit;(120) Input unit;(130) Sensing unit;(140) Control unit

Description

USER TERMINAL APPARATUS AND CONTROL METHOD THEREOF}

The present invention relates to a user terminal device and a control method, and more particularly, to a user terminal device and a control method for displaying a plurality of pages corresponding to each of a plurality of e-book content on one screen.

Recently, with the development of Internet generalization and mobile communication service, information revolution has occurred in many parts, and it is continuing to develop. As a result, it is possible to provide movies, music, and books published offline, such as movies and dramas that were provided offline, and educational or living information, medical information, and economic information online. As it can be provided by the activation of the information providing business online is in progress.

Among these, e-books (e-books), which provide books that are published offline, are also called digital books, which can be loaded and read anytime, anywhere using the e-book viewer on the user's device. For example, the file of the EPUD format, the file of the PDF format).

Unlike e-books that are published offline, these e-books can be quickly searched, edited or updated with the latest information, and include not only text but also multimedia information such as sound or video. In addition, e-books can be configured to add digital rights (DRM) to prevent illegal copying and unauthorized distribution.

With the development of the above-described e-book technology, a method for promoting user convenience of a user terminal device for viewing an e-book using an e-book viewer has been requested.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and an object of the present invention is to link a page selected by a user operation while displaying a plurality of pages corresponding to each of a plurality of e-book contents on one screen. The present invention provides a user terminal device and a control method.

According to an aspect of the present invention, there is provided a method of controlling a user terminal device, the method comprising: displaying a plurality of pages corresponding to each of a plurality of e-book contents on one screen, and a user among the plurality of displayed pages. Linking the pages selected by the operation, and displaying an identifier indicating each link between the selected pages on each linked page.

When an identifier displayed on the first page is selected while at least one first page of the plurality of linked pages is displayed, the at least one second page linked to the first page is displayed. The method may further include displaying a page and one screen.

The method may further include receiving a user operation of accessing at least two pages of the displayed plurality of pages by touch and drag, and the linking may link at least two pages selected by the user operation. have.

The method may further include receiving a user operation for linking at least two pages of the displayed plurality of pages through the UI window for page linking, wherein the linking comprises: at least two pages selected by the user operation. Can be linked.

Further, when the user terminal device is changed from the first posture to the second posture, and the page displayed in the changed second posture includes a part of the content of the page displayed in the first posture before the change, in the second posture The method may further include distinguishing and displaying a part of the content of the page displayed in the first posture on the displayed page.

The displaying of the at least one second page linked to the first page on the first page and the one screen may be performed in a state in which at least one first page of the plurality of linked pages is displayed. When the identifier displayed on the first page is selected, the page content displayed at the link point of time may be distinguished from at least one first and second page displayed on the one screen.

On the other hand, the user terminal device according to an embodiment of the present invention for achieving the above object, the display unit for displaying a plurality of pages corresponding to each of the plurality of e-book content on one screen, an input unit for receiving a user operation; And a control unit for controlling a display unit to link a page selected by the input user operation among the plurality of displayed pages, and to display an identifier indicating a link between the selected pages on each linked page.

The controller may further include at least one second page linked to the first page when an identifier displayed on the first page is selected while displaying at least one first page among a plurality of linked pages. The display unit may be controlled to display a on the first page and one screen.

The controller may link at least two pages selected by the input user operation when a user operation for accessing at least two pages among the displayed plurality of pages by touch and drag is input through the input unit. .

The controller may link at least two pages selected by the user operation when a user operation for linking at least two pages among the displayed plurality of pages through the UI window for page linking is input through the input unit. have.

The apparatus may further include a detector configured to detect a posture change of the user terminal device, wherein the controller changes the user terminal device from a first posture to a second posture, and displays a page displayed in the changed second posture before the change. In the case of including a part of the content of the page displayed in the first posture, the display unit may be controlled to distinguish and display a part of the content of the page displayed in the first posture on the page displayed in the second posture.

The controller may be further configured to display at least one page content displayed on the screen when the identifier displayed on the first page is selected while at least one first page of the plurality of linked pages is displayed. The display unit may be controlled to display differently from one first and second page.

On the other hand, in the recording medium in which the program code for performing the control method of the user terminal device according to an embodiment of the present invention for achieving the above object, the control method corresponds to each of a plurality of e-book content Displaying a plurality of pages on one screen; linking a page selected by a user operation among the displayed plurality of pages; and displaying an identifier indicating a link between the selected pages on each linked page. .

According to various embodiments of the present disclosure, in the state where a plurality of pages corresponding to each of a plurality of e-book contents are displayed on one screen, the user can easily know the reference page by linking the page selected by the user operation. It has an effect.

1 is a block diagram illustrating a user terminal according to an embodiment of the present invention.
2 illustrates a method of displaying a page corresponding to an e-book content in a landscape mode;
3 is a diagram illustrating a method of displaying a page corresponding to e-book content in a portrait mode;
4 is a diagram illustrating a method of displaying a plurality of pages corresponding to each of a plurality of e-book contents in a landscape mode;
5 is a diagram illustrating a method of displaying a plurality of pages corresponding to each of a plurality of e-book contents in a portrait mode;
6 is a view illustrating a method of changing a position where a plurality of e-book contents are displayed in a landscape mode;
FIG. 7 is a diagram illustrating a method of linking a page selected by a user operation among a plurality of pages corresponding to each of a plurality of e-book contents in a landscape mode;
8 is a diagram illustrating a screen display method according to posture change or link identifier selection of a user terminal device;
9 is a flowchart illustrating a control method of a user terminal device according to an exemplary embodiment.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating a user terminal according to an embodiment of the present invention. Referring to FIG. 1, the user terminal device 100 may include all or a portion of the display 110, the inputter 120, the detector 130, and the controller 140.

The user terminal device may be implemented as various devices such as a mobile phone, a smart phone, a notebook computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation device, a digital TV, a desktop computer, and the like.

The display 110 functions to display a screen. In particular, the display 110 may display a plurality of pages corresponding to each of the plurality of e-book contents on one screen. This will be described in detail with reference to FIGS. 2 to 3.

2 is a diagram illustrating a method of displaying a page corresponding to e-book content in a landscape mode. The landscape mode state herein refers to a state in which the user terminal device is disposed in a landscape direction.

When displaying one e-book content A, as shown in FIG. 2 (a), it may be divided into two pages based on a dotted line and displayed on one screen. However, the present invention is not limited thereto, and depending on the setting, one page may be displayed on one screen, or three or more pages may be displayed on one screen. In this case, the divided pages may be divided and displayed as shown in FIGS. 2 (b) to 2 (f).

When two e-book contents A and B are displayed, pages corresponding to the two e-book contents A and B may be displayed on one screen as shown in FIG.

In addition, when three e-book contents A, B, and C are displayed, pages corresponding to the e-book contents A are displayed without overlapping on one region as shown in FIG. , C) Each page can be displayed on one screen by overlapping one area. In some cases, as shown in FIG. 2D, the page corresponding to the e-book content A is displayed in the largest area, and the page corresponding to each of the e-book contents B and C is divided into one area. Can be displayed on one screen.

In addition, in the case of displaying four e-book contents A, B, C, and D, as shown in FIG. A page corresponding to each of the book contents C and D may be positioned at the rear end of the overlapped area and displayed on one screen. In some cases, as shown in FIG. 2F, pages corresponding to the e-book contents A, B, C, and D may be divided into four and displayed on one screen.

3 is a diagram illustrating a method of displaying a page corresponding to e-book content in a portrait mode. Here, the portrait mode state refers to a state in which the user terminal device is disposed in the portrait direction.

When displaying one e-book content A, one page may be displayed on one screen as shown in FIG. However, the present invention is not limited thereto, and two or more pages may be displayed on one screen depending on the setting. In this case, the divided pages may be divided and displayed as shown in FIGS. 3 (b) to 3 (f).

In addition, when displaying two e-book contents (A, B), as shown in Fig. 3 (b), the page corresponding to the e-book content (A) in front of the page corresponding to the e-book content (A) It can be displayed on one screen by overlapping each other on the back stage. In addition, as illustrated in FIG. 3C, pages corresponding to the e-book contents A and B may be displayed on one screen without overlapping each other.

In addition, in the case of displaying three e-book contents A, B, and C, as shown in FIG. Pages corresponding to can be displayed on one screen by overlapping each other on the back stage. In addition, as illustrated in FIG. 3E, pages corresponding to the e-book contents A, B, and C may be displayed on one screen without overlapping each other.

In addition, in the case of displaying four e-book contents A, B, and C, as shown in FIG. 3 (f), one page is divided into four pages corresponding to each of the e-book contents A, B, C, and D. Can be marked on.

The display unit 110 may include a liquid crystal display, a thin film transistor-liquid crystal display, an organic light-emitting diode, a flexible display, and a three-dimensional display. It may be implemented as at least one of a display (3D display), transparent.

The input unit 120 performs a function of receiving a user operation. Here, the input unit 120 may be implemented as a touch sensor. The touch sensor may be implemented as capacitive or pressure sensitive. The electrostatic type is a method of calculating touch coordinates by detecting fine electricity excited by the user's human body when a part of the user's body is touched by the display 110 by using a dielectric coated on the surface of the display 110. . The depressurization type includes two electrode plates, and when the user touches the screen, the top and bottom plates of the touched point contact with each other to sense current flow, and the touch coordinates are calculated. As described above, the touch sensor may be implemented in various forms. Accordingly, when a user's touch manipulation is input, the input unit 120 transmits an electric signal corresponding to the touched point to the controller 130, and the controller 130 uses the coordinates to which the electric signal is transmitted to select the touch point. I can recognize it.

The input unit 120 may also be implemented as a proximity sensor. The proximity sensor is a sensor for sensing the approaching motion without touching the surface of the display unit 110 directly. The proximity sensor is a high-frequency oscillation type that forms a high-frequency magnetic field and senses a current induced by a magnetic field characteristic that changes when approaching an object, a magnetic type using a magnet, a capacitive type And the like. Accordingly, when the user's manipulation according to the proximity motion is detected, the input unit 120 transmits an electrical signal corresponding to the user's manipulation to the controller 130, and the controller 130 uses the transferred electrical signal to the user according to the proximity motion. Manipulation can be recognized.

In addition, the input unit 120 may be implemented by combining an input device such as a mouse or a keyboard with a display device such as the display 110. In this case, the controller 130 may perform a function corresponding thereto by using a user operation input through the input device.

The detector 130 detects a change in posture of the user terminal device. The sensing unit 130 may be implemented using at least one of a geomagnetic sensor, an acceleration sensor, and a gyro sensor. Accordingly, the detector 130 may detect a change in posture from the landscape mode state to the portrait mode state or the portrait mode state to the landscape mode state of the user terminal device 100.

The control unit 140 controls the overall operation of the user terminal device 100. In more detail, the controller 140 may control all or part of the display 110, the inputter 120, and the detector 130.

In particular, the controller 140 may link a page selected by a user operation input among a plurality of displayed pages. That is, the controller 140 may link a page selected by an input user operation among a plurality of displayed pages while a page corresponding to each of the plurality of e-book contents is displayed on one screen.

Here, the user manipulation may be a user manipulation of approaching at least two pages of a plurality of displayed pages by touch and drag.

Also, the user operation may be a user operation for linking at least two pages of the displayed plurality of pages input through the UI window for linking the page.

In this case, the controller 140 may link at least two pages selected by the above-described user manipulation. However, the user operation is not limited to the above-described operation, and may be performed in various ways, such as a user operation of touching at least two pages of the plurality of displayed pages for a preset time.

In addition, the controller 140 may control the display 110 to display an identifier indicating a link between selected pages on each linked page. In this case, the identifier represents a link between the selected pages and may be implemented in various shapes or texts. For example, the shape may be implemented in various shapes such as a bar shape and a star shape displayed on a specific area, and in some cases, may be implemented as link text displayed on a specific area. Alternatively, when the linked page is displayed, the user may be notified that the link is linked with a sound or a video.

In addition, the controller 140 may display at least one second page linked to the first page when the identifier displayed on the first page is selected while at least one first page of the plurality of linked pages is displayed. The display 110 may be controlled to display a page and one screen. This will be described in detail with reference to FIG.

In addition, when the identifier displayed on the first page is selected while at least one first page of the plurality of linked pages is displayed, the controller 140 displays at least one page content displayed on the screen at the time of linking. The display 110 may be controlled to display differently from the first and second pages. For example, assuming that four e-book contents A, B, C, and D are displayed, a link of a page corresponding to each of the two e-book contents A and B is performed. Let's do it. In this case, because of the size of the screen, the page corresponding to each of the two e-book contents (A, B) is performed in the state where the two e-book contents (A, B) are displayed. The content contained is less.

Therefore, when the user selects an identifier to display a plurality of pages linked to one screen, the screen is displayed in two states at the time of linking (that is, four e-book contents A, B, C, and D) are displayed. Page contents displayed on each of the e-book contents A and B). In this case, the controller 140 may control the display unit 110 to display the page content displayed at the link time point separately from at least one first and second page displayed on one screen. Highlights and the like may be used here for differentiation.

In addition, when the user terminal apparatus 100 is changed from the first posture to the second posture, and the page displayed in the changed second posture includes a part of the content of the page displayed in the first posture before the change, The display 110 may be controlled to distinguish and display a part of the contents of the page displayed in the first posture on the page displayed in the second posture. Here, the first and second postures may be in a landscape mode or a portrait mode state. This will be described in detail with reference to FIG. 8.

Here, the control unit 140 may include a CPU, a ROM storing a control program, a RAM used to store input data, or a RAM used as a work related storage area. Here, the CPU, ROM, and RAM can be interconnected via an internal bus.

4 is a diagram illustrating a method of displaying a plurality of pages corresponding to each of a plurality of e-book contents in a landscape mode state.

As shown in FIG. 4A, when the user performs the e-book content addition function while displaying two pages corresponding to the e-book content A in the landscape mode, the UI screen as shown in FIG. 4B is displayed. I can display it.

In this case, when the user selects the e-book content (B) on the UI, the left page corresponding to the e-book content (A) is automatically turned over as shown in Fig. 4 (c), as shown in Fig. 4 (d), A page corresponding to the selected e-book content B may be displayed. That is, a page corresponding to each of two e-book contents A and B may be displayed on one screen.

In this case, the user may view the e-book content by performing a multi-touch as shown in FIG.

5 is a diagram illustrating a method of displaying a plurality of pages corresponding to each of a plurality of e-book contents in a portrait mode.

As shown in FIG. 5 (a), when the user performs the e-book content addition function while displaying one page corresponding to the e-book content A in the portrait mode, the UI screen as shown in FIG. 5 (b) is displayed. I can display it.

In this case, when the user selects the e-book content (B) on the UI, as shown in Fig. 5 (c), the page corresponding to the e-book content (B) in front of the page corresponding to the e-book content (A) It can be displayed on one screen by overlapping each other on the back stage.

When a page corresponding to each of the e-book contents A and B is displayed on one screen and the user selects a page corresponding to the e-book content B as shown in FIG. 5 (c), the e-book contents The page corresponding to (B) can be displayed at the front.

In addition, as illustrated in FIG. 5E, when the screen is touched for a predetermined time or performed a specific operation, the display method of the page may be changed as shown in FIG. 5F.

If the page corresponding to each of the e-book contents A and B is enlarged and displayed on one screen as shown in FIG. 5 (f), the user can see the pages corresponding to each of the e-book contents A and B at a glance. none. In this case, the user may scroll through pages corresponding to each of the e-book contents A and B by scrolling as shown in FIG. The scrolling may be performed by a multi-touch scrolling.

Accordingly, the screen may be displayed as shown in FIG.

6 is a diagram illustrating a method of changing a position where a plurality of e-book contents are displayed in a landscape mode state.

As shown in FIG. 6A, when the user selects the e-book content A and the e-book content B while displaying a UI screen corresponding to the e-book content adding function, as shown in FIG. 6 (b). The page corresponding to the e-book content A may be displayed on one screen by placing the page corresponding to the e-book content B on the left side.

In this case, as shown in FIG. 6C, when the user performs an operation of turning the page corresponding to the e-book content B to the next page, the next page turned over may be displayed as shown in FIG. 6D. In addition, when the user touches the page corresponding to the e-book content A as shown in FIG. 6 (d) and performs a drag and drop operation to a region where the page corresponding to the e-book content B is displayed, As illustrated in FIG. 6E, the location of the e-book content may be changed and displayed. That is, a page corresponding to the e-book content A may be arranged on the right side of the page corresponding to the e-book content A on the left side of the page, and displayed on one screen.

FIG. 7 is a diagram illustrating a method of linking a page selected by a user operation among a plurality of pages corresponding to each of a plurality of e-book contents in a landscape mode state.

As shown in FIG. 7A, in a state where a page corresponding to the e-book content A is placed on the left side and a page corresponding to the e-book content B is placed on the left side, the user displays the e-book content ( When the page corresponding to B) is turned over to the next page, the next page turned over may be displayed as shown in FIG.

In this case, when the user approaches the page corresponding to the touch and drag e-book content A and the page corresponding to the e-book content B as shown in FIG. You can link the selected page. As illustrated in FIG. 7C, an identifier 701 indicating a link between selected pages may be displayed on each linked page.

If the user reads the page corresponding to the e-book content, the page linked by the user's operation may be displayed on the page included in the tank jack content A as shown in FIG. In this case, when the user selects the identifier 701 displayed on the linked page, the linked page may be displayed on one screen as shown in FIG. 7E by the process of FIG. 7B.

However, the present invention is not limited to FIG. 7, and the user operation for linking includes a UI window for linking pages other than touch-and-drag which accesses a page corresponding to the e-book content A and a page corresponding to the e-book content B. It can be performed through. For example, the UI window for linking the page may be displayed in a predetermined area of the displayed screen, and thus the user may select an area for performing the link function in the UI window. In this case, pages corresponding to each of the e-book contents displayed on one screen may be linked. That is, if a page corresponding to the e-book content A and a page corresponding to the e-book content B are displayed on one screen, the page corresponding to the currently displayed e-book content A and the e-book content B are displayed. Link to a page corresponding to.

In addition, unlike FIG. 7, one page or three or more pages may be displayed on one screen. In this case, the user may link each page by performing a user operation for linking each page.

In addition, unlike FIG. 7, the identifier may be implemented in various shapes. For example, it may be implemented in various shapes such as star shape and link text to indicate that the pages are linked. Here, the identifier may be displayed at various positions, unlike in FIG. 7.

8 is a diagram illustrating a screen display method according to posture change or link identifier selection of a user terminal device.

As shown in FIG. 8A, in a portrait mode, the user displays a page corresponding to the e-book content A on the upper side and displays a page corresponding to the e-book content B on the lower side and displays the page on one screen. As shown in FIG. 8B, the user terminal device 100 may perform posture switching in a landscape mode state, and control to display one e-book content on two screens by dividing one e-book content into two pages.

If the page displayed in the landscape mode includes a part of the content of the displayed page in the portrait mode, as shown in FIG. Can be distinguished and displayed.

However, in some cases, when the user performs posture switching of the user terminal device 100, if the page displayed after the posture change includes a part of the content of the page displayed before the posture change, before the posture change on the displayed page after the posture change Some of the contents of the displayed page can be highlighted and displayed separately.

In this case, when the user selects an identifier indicating a link as shown in FIG. 8 (b), the page linked to the selected page may be displayed as shown in FIG. 8 (c). In this case, the page contents displayed at the link point of time as shown in FIG. 8A may be distinguished and displayed on the page displayed by the link.

9 is a flowchart illustrating a control method of a user terminal device according to an exemplary embodiment. Referring to FIG. 9, a plurality of pages corresponding to each of a plurality of e-book contents are displayed on one screen (S901).

The page selected by the user's operation among the displayed plurality of pages is linked (S902).

Here, the user manipulation may be a user manipulation of approaching at least two pages of a plurality of displayed pages by touch and drag.

In addition, the user operation may be a user operation of inputting a command for linking at least two pages of the plurality of pages displayed through the UI window for page linking. In this case, the linking may link at least two pages selected by the user operation.

In operation S903, an identifier indicating a link between the selected pages is displayed on each linked page.

When the identifier displayed on the first page is selected while at least one first page of the plurality of linked pages is displayed, the at least one second page linked to the first page is displayed on the screen with the first page. (S904)

In addition, the control method of the user terminal device, if the user terminal device is changed from the first posture to the second posture, and the page displayed in the changed second posture includes a part of the content of the page displayed in the first posture before the change A part of the contents of the page displayed in the first posture may be distinguished and displayed on the page displayed in the posture.

In operation S904, when an identifier displayed on the first page is selected while at least one first page of the plurality of linked pages is displayed, the page content displayed on the link point of time may be displayed on at least one first and second page. It can be displayed separately from the second page.

Meanwhile, the method for controlling a user terminal device according to various embodiments of the present disclosure described above may be implemented as program code and provided to each server or device in a state of being stored in various non-transitory computer readable mediums. Can be.

A non-transitory readable medium is a medium that stores data for a short period of time, such as a register, cache, memory, etc., but semi-permanently stores data and is readable by the apparatus. In particular, the various applications or programs described above may be stored on non-volatile readable media such as CD, DVD, hard disk, Blu-ray disk, USB, memory card, ROM,

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the present invention.

100: user terminal device 110:
120: input unit 130: detection unit
140:

Claims (13)

A method of controlling a user terminal device,
Displaying a plurality of pages corresponding to each of the plurality of e-book contents on one screen;
Linking a page selected by a user's operation among the plurality of displayed pages;
Displaying on each linked page an identifier indicating a link between the selected pages. The method of claim 1,
If at least one first page of the plurality of linked pages is being displayed, and an identifier displayed on the first page is selected, at least one second page linked to the first page is connected to the first page. Displaying on one screen; Control method characterized in that it further comprises. The method of claim 1,
Receiving a user operation of accessing at least two pages of the displayed plurality of pages to each other by touch and drag;
The linking step,
And controlling at least two pages selected by the user operation. The method of claim 1,
Receiving a user operation for linking at least two pages of the displayed plurality of pages through the UI window for the page link;
The linking step,
And controlling at least two pages selected by the user operation. The method of claim 1,
If the user terminal device is changed from the first posture to the second posture, and the page displayed in the changed second posture includes a part of the content of the page displayed in the first posture before the change, the page displayed in the second posture And distinguishing and displaying a part of the contents of the page displayed in the first posture. 3. The method of claim 2,
Displaying the at least one second page linked to the first page on the screen with the first page,
When at least one first page of the plurality of linked pages is displayed, when an identifier displayed on the first page is selected, at least one first and first display of page contents displayed at the link point on the screen is performed. A control method characterized by displaying differently from two pages. In a user terminal,
A display unit displaying a plurality of pages corresponding to each of the plurality of e-book contents on one screen;
An input unit for receiving a user operation;
And a controller configured to link a page selected by the input user operation among the displayed plurality of pages and to display an identifier indicating a link between the selected pages on each linked page. The method of claim 7, wherein
The control unit,
If at least one first page of the plurality of linked pages is being displayed, and an identifier displayed on the first page is selected, at least one second page linked to the first page is connected to the first page. The user terminal device, characterized in that for controlling the display to display on one screen. The method of claim 7, wherein
The control unit,
And when at least two pages of the plurality of displayed pages are touched and dragged to access each other through the input unit, the at least two pages selected by the input user operation are linked. The method of claim 7, wherein
The control unit,
When a user operation for linking at least two pages of the displayed plurality of pages through the UI window for page linking is input through an input unit, the user terminal device characterized in that for linking at least two pages selected by the user operation. . The method of claim 7, wherein
Further comprising: a detector for detecting a change in posture of the user terminal device,
The control unit,
If the user terminal device is changed from the first posture to the second posture, and the page displayed in the changed second posture includes a part of the content of the page displayed in the first posture before the change, the page displayed in the second posture And controlling the display unit to distinguish and display a part of the content of the page displayed in the first posture. 9. The method of claim 8,
The control unit,
When at least one first page of the plurality of linked pages is displayed, when an identifier displayed on the first page is selected, at least one first and first display of page contents displayed at the link point on the screen is performed. And the display unit is controlled so as to be distinguished from two pages. A recording medium having recorded thereon a program code for performing a control method of a user terminal device,
In the control method,
Displaying a plurality of pages corresponding to each of the plurality of e-book contents on one screen;
Linking a page selected by a user's operation among the plurality of displayed pages;
Displaying on each linked page an identifier indicating a link between the selected pages.

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