KR101501771B1 - Portable type electronic apparatus - Google Patents

Abstract

The portable electronic apparatus includes at least one housing rotatable about a base housing, and each housing is provided with a single-plate double-sided display device. The upper and lower menus can be activated simultaneously The present invention relates to a portable electronic apparatus capable of using multi-texts. To this end, a portable electronic apparatus includes a base housing, a first housing rotatably coupled to one end of the base housing, A second housing provided at least one between the base housing and the first housing and being folded and rotated together with the base housing and the first housing and a second housing provided in the first housing and the second housing, , And a single plate is provided on the front and rear surfaces of the first and second housings A display device for displaying different screens, and a hinge for allowing the first housing and the second housing to rotate in the base housing, thereby enabling the use of various multi- And various multimedia functions can be used in one portable electronic device.

Portable electronic device, double-sided display device, base housing, first and second housings

Description

[0001] PORTABLE TYPE ELECTRONIC APPARATUS [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable electronic device, and more particularly, to a portable electronic device having at least one housing rotated around a base housing in a portable electronic device, and a single- The present invention provides a portable electronic apparatus capable of using multi-text which can be used by simultaneously activating an upper menu and a lower menu.

Generally, a portable electronic device is a device that allows a user such as a portable terminal, an mp3 player, or a PMP to contact with various contents while carrying the portable electronic device. The portable electronic device is multifunctional according to the desire of the consumer , The size of which is becoming smaller.

Particularly, only a service limited to a voice call or a short message transmission has been provided at the time when a mobile communication service through a portable terminal starts to be commercialized. However, as the transmission / reception speed in wireless communication and the degree of integration of terminal circuit devices are improved, Has gradually become able to send e-mails, video files, etc. Recently, the Internet service, which was provided as a personal computer, has reached a level that can be enjoyed through a portable terminal.

In addition, in recent years, not only photography, video recording and music. Various types of multimedia portable terminals having a QWERTY key and a large display device for enjoying various multimedia functions such as games, electronic dictionaries, the Internet, and DMB are provided. A general form of such a multimedia portable terminal is shown in Figs. 1A to 1D.

As shown in FIGS. 1A to 1D, according to the external shape of the various multimedia portable terminals, a bar terminal for multimedia equipped with input / output devices such as a QWERTY keypad, a large display device, a transmitter, A folding type and a sliding type terminal for multimedia in which input and output devices of a multimedia are appropriately dispersed and arranged in a pair of housings, and recently, a bar type having a touch screen for inputting on a large screen by using a touch screen Terminals are also being commercialized.

1A, a bar-type terminal 10a for multimedia includes a display device 13a, a function key 14a, a Qwerty keypad 15a, and a transmitting / receiving device 16a in a single housing 11a Both.

The folder type terminal 10b for multimedia has a main body housing 11b having a Qwerty keypad 15b on one side folded and a display device 13b on the side facing the Qwerty keypad 15b And a folding housing 12b.

Although not shown in the figure, the multimedia folder terminal 10b is further provided with a transmitting and receiving unit and a front display unit on one side which is generally folded.

The foldable terminal 10b for multimedia is foldably connected to the main body housing 11b and the folding housing 12b by a hinge device provided laterally. In addition, it is provided to have a relatively large display device 13b and a Qwerty keypad 15b arrangement as compared with the bar-type terminal 10a for multimedia shown in Fig.

Accordingly, it is possible to carry the mobile phone, miniaturize the housing by folding the housing at the time of communication, and facilitate the manipulation of the enlarged screen and the key buttons by spreading multimedia functions such as a call, a game, a DMB, the Internet and an electronic dictionary during use.

As shown in FIG. 1C, the multimedia sliding type terminal 10c is provided with a sliding housing 12c which is slidably moved in the direction perpendicular to the longitudinal direction of the main body housing 11c.

The sliding housing 12c includes a display device, a keypad 14c for transmitting and receiving data and a transmitting and receiving portion 16c. The main housing 11c is provided with a QWERTY keypad 15c .

1D, a bar-shaped terminal for multimedia has a bar-shaped terminal 10d having a touch screen having one side thereof as a touch-type large-sized display device.

 Since the bar-shaped terminal 10d having a touch screen is provided with the display device 13d as one side thereof, it is possible to use the large-sized screen in addition to the transmission and reception functions as well as the multimedia function, .

2 and 3 illustrate a bar-type terminal equipped with a touch screen, which is connected to the Internet and uses one site or a personal mailbox.

As shown in FIGS. 2 and 3, in the bar type terminal 10c having a touch screen, which is frequently used in recent years, when using the Internet using a terminal or using a personal mail box, a menu is clicked on one of the texts A and C When the user moves to the lower text B or D, the main screen of the display device is changed to the lower text B or D selected in the upper text A or C. In order to confirm another lower text, You should select the sub-text again.

Accordingly, in the multimedia terminals, when the multimedia function for selecting a plurality of menus such as the Internet or a personal mail box is used, it is troublesome to check the upper text and the lower text alternately.

In addition, the bar-type terminal 10a for multimedia has a limitation in that it has a larger-sized display device than the folder type terminal 10b for a multimedia or the bar-type terminal 10d having a touch screen, The mounting space of the QWERTY keypad or the like is limited, which is inconvenient for the user to use.

The bar type terminals having the multimedia bar type 10a, the folding type 10b, the sliding type 10c and the touch screen 10d have only one display device to use the multimedia function, It is difficult to implement a display.

Accordingly, there is a need for a portable electronic device capable of simultaneously verifying various multi-texts based on one main text when a multimedia function is used in a portable multimedia terminal.

In recent years, there has been a growing interest in a double-sided LCD using a single plate, and development of various portable electronic devices using the same is on the increase. The contents of this double-sided LCD are described in detail in Korean Patent Laid-Open Publication No. 10-2007-0076652 (filed on January 19, 2006, Samsung Electronics Co., Ltd.) and a portable terminal having the same.

Accordingly, there is a need for a slim portable electronic device by applying a single display device that displays different screens on both sides through one display device.

In addition, there is a need for a portable electronic device capable of full browsing by having at least two housings having both side displays to have different screens on both sides of a single panel, so that the two screens can be simultaneously viewed as if spread like a book It is a fact.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a portable electronic device having at least one foldable housing rotatable about a housing, The display device is provided with a double-sided display device for providing a function of transmitting and receiving in a folded state and using a general multimedia function. In a folded state, when a submenu is selected in a display window of the main screen, So that a menu screen can be displayed.

In addition, when using various multimedia functions such as games, navigation, and the Internet, a large-sized screen can be used, and a portable electronic device can be used by simultaneously activating an upper menu and a lower menu through use of multi-text .

To this end, in a portable electronic device,

A base housing;

A first housing rotatably coupled to one end of the base housing and provided at an upper end of the base housing;

A second housing provided between the base housing and the first housing and being folded and rotated together with the base housing and the first housing;

A display device provided on the first housing and the second housing, the display device being provided as a single plate and displaying different screens on the front and rear surfaces of the first and second housings; And

And a hinge portion for rotating the first housing and the second housing in the base housing.

The display device includes:

A single first double-sided drive display unit provided on the first housing and displaying different screens on the front and rear surfaces of the first housing,

And a single second double-sided drive display unit provided on the second housing and displaying different screens on the front and rear surfaces of the second housing.

Wherein the first double-sided drive display unit comprises a single panel,

A first display window provided on a front surface of the first housing to display a screen and a second display window provided on a rear surface of the first housing to display a screen different from the first display window,

Wherein the second double-sided drive display unit comprises a single panel,

A third display window provided on a front surface of the second housing for displaying a screen different from the first and second display windows and a second display window provided on a rear surface of the second housing for displaying different screens from the first, And a fourth display window provided on the first display window.

In the first state in which the first housing, the second housing, and the base housing are folded in order, the first display window of the first housing is always open to the outside,

The second display window of the first housing and the third display window of the second housing are opened to the outside when the second housing and the base housing are folded together and in a second state in which the first housing is rotated, ,

And the fourth display window of the second housing is opened in a third state in which the first housing and the second housing are folded and rotated in the base housing.

Wherein the first display window forms the main screen of the portable electronic device in the first state,

Wherein at least one of the second display window and the third display window forms a main screen of the portable electronic device in the second state,

And the fourth display window in the third state forms a main screen of the portable electronic device.

In the second state, when the menu displayed on the second display window is selected, the screen of the selected menu is displayed on the third display window.

In the first state, the portable electronic device is provided in at least one of a transmission mode, a reception mode, a DMB mode, an mp3 mode, a camera mode, and a navigation mode,

In the second and third states, the portable electronic apparatus is provided with at least one of a notebook mode, a DMB mode, a game mode, and an electronic dictionary mode.

And an input key for operating the fourth display window on one side of the base housing facing the fourth display window in the third state.

And the input key is provided in a QWERTY key arrangement.

Wherein the input key comprises a touch key.

The hinge unit includes:

A first side hinge arm provided on at least one end of the base housing;

A center hinge arm provided at one end of the second housing and coupled between the first side hinge arms;

A second side hinge arm provided on the first housing and coupled to both ends of the first side hinge arm and coupled between the first side hinge arm and the center hinge arm; And

And a rotation module provided on at least one side of the first and second side hinge arms and the center hinge arm for coupling and rotating the first and second side hinge arms and the center hinge arm, A portable electronic device is disclosed.

The hinge module includes a hinge shaft, a hinge cam, and a hinge spring which are provided at an angle portion and an oval portion, and are provided at one end of the hinge cam and a hinge cam to provide a restoring force of the hinge cam.

The first, second, and third housings are electrically connected to the first, second, and third hinge arms through a flexible circuit board.

And a transmitter and receiver are provided on upper and lower ends of the first display window of the first housing.

As described above, according to the portable electronic device according to the present invention,

The first and second housings are rotatable around the base housing. The first and second housings are provided with a single plate to provide different screens. Thus, in the folded state, A general multimedia mode, and a multimedia function such as a navigation function, an mp3 function, or a DMB function through an enlarged screen.

In addition, in a state in which the first housing or the second housing is unfolded from the base housing, a selected text screen can be displayed on each of the display windows of one surface of the first housing and one surface of the second housing, It is possible to provide a variety of screens when using a screen such as a screen.

For example, the first, second, and base housings may all be folded, so that the first, second, and base housings may be used in a single display window. In the rotated state of the first housing, it is possible to easily use the Internet, mail, or the like that allows various windows to be used by using the two different display windows that are opened. In the base housing, It is possible to use various functions such as an electronic dictionary and a game in accordance with the mounting of the QWERTY keypad on the other side of the display window on one side and thus various types of multimedia functions can be utilized through one portable electronic device There is an effect.

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

4 to 7, the portable electronic device 100 includes a base housing 120, a first housing 110, a second housing 130, a display device 111a, and a hinge 140 . The first housing 110 is rotatably coupled to one end of the base housing 120 so as to be provided at an upper end of the base housing 120. The second housing 130 is provided between the base housing 120 and the first housing 110 so as to be folded and rotated together with the base housing 120 and the first housing 110 . The display device 111a includes a first housing 110 and a second housing 130 so as to display different images on the front and rear surfaces of the first and second housings 110 and 130, Respectively. The hinge unit 140 is provided at one end of the base, the first and second housings 120, 110 and 130 to rotate the first housing 110 and the second housing 130 in the base housing 120 have.

4 to 8, the display device 111a includes a first two-sided drive display unit 111 and a second two-sided drive display unit 131. The first both-side drive display unit 111 is provided on the first housing 110 as a single plate to display different screens on the front and rear sides of the first housing 110. The second double-sided drive display unit 131 is provided on the second housing 130 as a single plate to display different screens on the front and rear sides of the second housing 130.

As shown in FIGS. 6 and 7, the first both-side drive display unit 111 includes a single display panel 111a and a second display window 111b. The first display window 111a is provided on the front surface of the first housing 110 to display a screen on the front surface of the first housing 110. [ The second display window 111b is provided on the rear surface of the first housing 110 so as to display a screen different from the first display window 111a. 6 to 9, the second double-sided driving display unit 131 is formed of a single panel, and includes a third display window 131a and a fourth display window 131b. The third display window 131a is provided on the front surface of the second housing 130 so as to face the second display window 111b to display a screen on the front surface of the second housing 130. [ The fourth display window 131b is provided on the rear surface of the second housing 130 to display a screen different from the first, second, and third display windows 111a, 111b, and 131a.

As shown in FIGS. 5, 8, and 9, the first and second housings 110 and 130 and the base housing 120 are provided in the first, second, and third states according to the folded state and the rotated state. 5, in a first state in which the first housing 110, the second housing 130, and the base housing 120 are folded in order, the first housing 110, the first housing 110, As shown in FIGS. 7 and 8, when the second housing 130 and the base housing 120 are folded, the display window 111a is always opened to the outside, The second display window 111b of the first housing 110 and the third display window 131a of the second housing 130 are opened to the outside, 9, in the third state in which the first housing 110 and the second housing 130 are folded and rotated in the base housing 120, the fourth state of the second housing 130 The display window 131b is opened.

5, 8, and 9, in the first state, the first display window 111a forms a main screen of the portable electronic device 100, and in the second state, At least one of the second display window 111b and the third display window 131a forms a main screen of the portable electronic device 100. In the third state, The main screen of the electronic device 100 is formed.

11, in the second state, when the lower menu y is selected in the upper menu Y displayed on the second display window 111b, the upper menu Y is displayed on the second display window 111b, Is displayed on the window 111b, and the screen of the selected sub menu y is displayed on the third display window 131a.

4 and 5, in the first state, the portable electronic device 100 is provided in at least one of a transmission mode, a reception mode, a DMB mode, an mp3 mode, a camera mode, and a navigation mode, As shown in FIGS. 8 to 11, in the second and third states, the portable electronic device 100 is provided in at least one of a notebook mode, a DMB mode, a game mode, and an electronic dictionary mode.

9, on one surface of the base housing 120 facing the fourth display window 131b in the third state, an input key 121 (see FIG. 9) for operating the fourth display window 131b .

As shown in FIG. 9, the input key 121 is provided in a QWERTY key arrangement.

Although not shown, the input key 121 preferably comprises a touch key.

12 to 15, the hinge unit 140 includes a first side hinge arm 141, a center hinge arm 142, a second side hinge arm 143, and a hinge module 144 . At least one first side hinge arm 141 is provided at one end of the base housing 120. The center hinge arm 142 is provided at one end of the second housing 130 to be coupled between the first side hinge arms 141. The second side hinge arm 143 is coupled to both ends of the first side hinge arm 141 and is coupled to the first side hinge arm 141 and the center hinge arm 142, (Not shown). The first and second side hinge arms 142 and 142 are coupled to the first and second side hinge arms 142 and 142 so that the first and second side hinge arms 142 and 142 can be engaged with the first and second side hinge arms 142 and 142, At least one inner side is provided.

Although not shown in the drawings, the hinge module 144 is provided with a hinge shaft, a hinge cam, and a hinge spring, and the hinge shaft and the hinge cam are provided with an angular portion and a trough portion to face each other, Is preferably provided at one end of the hinge cam to provide a restoring force of the hinge cam.

The first, second, and third housings are electrically connected to the first and second center hinge arms 142 through a flexible circuit board.

As shown in FIGS. 4 and 5, a transmitter / receiver 113 is provided at the upper and lower ends of the first display window 111a of the first housing 110.

The operation of the portable electronic device 100 according to a preferred embodiment of the present invention will now be described in detail with reference to FIGS. 4 to 15. FIG.

The portable electronic device 100 is formed so that the first and second housings 110 and 130 are rotatable about the hinge axis of the hinge unit 140 one by one with the base housing 120 as a center.

In addition, the first and second housings are provided with a double-sided display device 111a capable of displaying different screens on the front and rear sides by full browsing. By providing the display device 111a having a single panel capable of displaying on both sides of the screen, even if a plurality of housings are provided in a folded state, the thickness thereof can be made slim.

First, the first state in which the base housing 120, the first and second housings 110 and 130 are folded will be described.

The first display window 111a of the first housing 110 is always opened to the outside while the first and second housings 110 and 130 are sequentially folded on the base housing 120. [ It is most preferable that the first and second display windows 111a and 111b are formed in the upper and lower ends of the first and second display windows 111a and 111b.

Therefore, functions that can be used by using the first display window 111a are used in the first state. For example, you can use the Song / Receive mode, the DMB mode, the mp3 mode, and the navigation mode. A menu key 112 for selecting a simple menu or the like to use a mode having various multimedia functions can be displayed on the lower side of the first display window 111a, .

A second state in which the first housing 110 is rotated in a state where the base housing 120 and the second housing 130 are folded will be described.

The first housing 110 is connected to the second housing 130 and the base housing 120 in order to provide a second state in which the user can use the Internet, Rotate in the folded state.

The second display window 111b provided on the rear surface of the first housing 110 is opened and the second display window 111b of the second housing 130 folded with the rear surface of the first housing 110 is opened. 3 display window 131a is opened.

The second and third display windows are also configured as touch screens.

In the second state, the second and third display windows 111b and 131a, which are formed opposite to each other, can be used, so that the functions of using all of the display devices 111a facing each other can be performed in the second state Is used. For example, it is possible to use a notebook mode for performing the same function as the Internet or a notebook computer, a DMB mode for using a multi-screen, a game mode, an electronic dictionary mode, and the like. .

As shown in FIG. 11, in the second state, the user uses the portable electronic device 100 to display a home page connected to the portable electronic device 100 in a notebook mode.

In the second state, when the user accesses the Internet and accesses a main menu of a desired homepage, the main menu (hereinafter referred to as an upper menu Y) of the site is displayed in the second display window 111b. When the user selects the text of the desired sub menu y in the upper menu Y and clicks on the touch menu, the selected sub menu y is displayed in the third display window 131a, (y) can be confirmed.

Also, in this state, the user can again select another submenu (y) on the upper menu Y displayed on the second display window 111b. When the user selects the submenu to confirm the text of another submenu, the selected submenu is again displayed on the third display window 131a. However, the first lower menu y selected according to the setting of the user is displayed as the third display window 131a formed on the front surface of the second housing 130, and the second selected lower menu is displayed on the second housing 130 And the fourth display window 131b formed on the rear surface of the second display window 131b.

Therefore, if the user sets another submenu to be displayed as the fourth display window 131b, the user rotates the second housing 130 in the base housing 120, and the fourth display window 131b ) Can be checked.

Therefore, the upper menu Y is always displayed in one display window and can be confirmed by the user, and the lower menu y of the selected upper menu Y can be displayed in different display windows, Multi-text can be used.

In addition, although not shown, in the second state, for example, a user displays a personal mailbox on a display window when the user is using the notebook mode.

The personal mailbox is opened to confirm the mail of the user and the main screen of the personal mailbox is displayed on the second display window 111b. When a user selects a desired mail in the personal mailbox and clicks the screen, the text of the selected mail is displayed in the third display window 131a.

As a result, the user can check the mail.

Also, if another mail is selected in the second display window 111b to select another mail and the screen is clicked, the text of another selected mail is overlapped with the third display window 131a. However, according to the setting of the user, the first mail selected first may be displayed on the third display window 131a of the second housing 130 and the other mail may be displayed on the fourth display window 131b of the second housing 130 .

Accordingly, if the user sets another mail to be displayed on the fourth display window 131b, the user rotates the second housing 130 in the base housing 120, You will also be able to see other emails listed on the.

Therefore, the main screen of the mail is always displayed in one display window so that the user can check the sub-menu, and the sub-menu of the selected mail can be displayed in another display window, so that the user can simultaneously check a plurality of mail .

A third state in which the first and second housings 110 and 130 are rotated in the base housing 120 will be described.

The third state is a state in which the first and second housings are rotated in the base housing 120. The second housing 130 rotates the first housing 110 and rotates the first and second housings 110 and 120, It is also possible to configure the housings 110 and 130 to be folded and to rotate directly from the base housing 120 in a state where the first and second housings 110 and 130 are folded.

In the third state, one surface of the base housing 120 formed on the surface of the second housing 130 facing the fourth display window 131b may be provided with an end surface display device 111a A double-sided display device 111a or a QWERTY keypad 121 is provided, and most preferably a QWERTY keypad 121 is provided.

Accordingly, in the third state, functions for using the fourth display window 131b and the QWERTY keypad 121 are used. For example, a game mode, an electronic dictionary mode, or the like can be used. In addition, when the base housing 120 is provided with a display window instead of the QWERTY keypad 121, it can be used in a notebook mode.

In the third state, the use of the portable electronic device 100 as an electronic dictionary will be described as an example.

When a desired word is input by pressing or touching the QWERTY keypad formed on one side of the base housing 120, word information such as a general electronic dictionary is displayed on the fourth display window 131b.

Accordingly, various multimedia functions can be used in one portable electronic device 100 according to the first, second, and third states, and a main display window can be set according to a multimedia function to be used, At the same time, you can see several sub menus displayed on the main display window at the same time.

12 to 15, the assembly process of the portable electronic device 100 will be described. As shown in FIG. 12, the first side hinge (not shown) formed on one end surface of the base housing 120, And the second housing 130 is provided at the upper end of the base housing 120 so as to come into contact with the center hinge arm 142 between the arms.

As shown in FIG. 13, when one end face of the first side hinge arm 141 and the center hinge arm 142 is seen, four empty spaces are formed. As shown in FIG. 14, The hinge module 144 is installed between the first side hinge arm 141 and the center hinge arm 142 so that the housings can rotate with respect to each other.

In this state, as shown in FIG. 15, the second side hinge arms 143 of the first housing 110 are engaged and engaged with the four empty spaces.

Accordingly, the portable electronic device 100 can be provided to be turned over like a booklet.

The portable electronic device 100 of the present invention is not limited to the above-described embodiments and drawings, and various substitutions, modifications, and changes may be made without departing from the technical spirit of the present invention. And will be apparent to those skilled in the art.

For example, although only two housings of the first and second housings are provided to rotate around the base housing, it is also possible to provide more housings that rotate about the base housing 120 depending on the use or use thereof.

Also, it is possible to provide a speaker device for listening to sounds in each mode in any place of the base, the first and second housings.

The hinge unit includes a center hinge arm, a first and a second side hinge arms, and a hinge module. The hinge unit can rotate the first and second housings about the base housing. However, The structure can be changed at any time.

1A is a block diagram of a conventional bar type terminal for multimedia;

1B is a perspective view of a folder type terminal for multimedia according to the prior art;

1C shows a sliding type terminal for multimedia according to the prior art.

FIG. 1D illustrates a conventional bar type terminal having a touch screen for multimedia according to the related art. FIG.

Fig. 2 is a diagram showing an example of using the Internet in Fig. 4; Fig.

FIG. 3 is a view showing an example of using a personal mail box in FIG. 4; FIG.

4 is a perspective view illustrating a portable electronic device according to a preferred embodiment of the present invention.

5 illustrates a first state of a portable electronic device according to a preferred embodiment of the present invention.

6 is a cross-sectional view taken along line A-A 'of FIG. 4 and FIG. 5;

7 is a perspective view showing a state in which a first housing is rotated in a base housing and a second housing of a portable electronic device according to a preferred embodiment of the present invention.

8 is a diagram illustrating a second state of a portable electronic device according to a preferred embodiment of the present invention.

9 shows a third state of a portable electronic device according to a preferred embodiment of the present invention.

10 is a diagram illustrating a portable electronic device according to a preferred embodiment of the present invention in a navigation mode.

11 is a diagram illustrating a state in which a portable electronic device according to a preferred embodiment of the present invention is used in a first state to an Internet mode.

12 to 15 are views showing a assembling procedure of the portable electronic device and a mounting process of the hinge unit according to a preferred embodiment of the present invention.

Claims (14)

In a portable electronic device, A base housing; A first housing rotatably coupled to one end of the base housing and provided at an upper end of the base housing; A second housing provided between the base housing and the first housing and being folded and rotated together with the base housing and the first housing; A display device provided on the first housing and the second housing, the display device being provided as a single plate and displaying different screens on the front and rear surfaces of the first and second housings; And And a hinge unit for rotating the first housing and the second housing in the base housing, The display device includes: First and second display windows provided on the front and rear surfaces of the first housing, And a third and fourth display windows provided on the front and rear surfaces of the second housing, which are provided as a single plate to the second housing. The method according to claim 1, The display device includes a single first double-sided drive display unit provided in the first housing and a single second double-sided drive display unit provided in the second housing, The first two-sided drive display unit includes the first and second display windows, and displays a different screen on the first and second display windows, Wherein the second double-sided drive display unit includes the third and fourth display windows and displays different screens on the third and fourth display windows. delete The method according to claim 1, In the first state in which the first housing, the second housing, and the base housing are folded in order, the first display window of the first housing is always open to the outside, The second display window of the first housing and the third display window of the second housing are opened to the outside when the second housing and the base housing are folded together and in a second state in which the first housing is rotated, , Wherein the fourth display window of the second housing is opened in a third state in which the first housing and the second housing are folded and rotated in the base housing. 5. The method of claim 4, Wherein the first display window forms the main screen of the portable electronic device in the first state, Wherein at least one of the second display window and the third display window forms a main screen of the portable electronic device in the second state, And the fourth display window forms the main screen of the portable electronic device in the third state. 6. The method of claim 5, Wherein in the second state, when the menu displayed on the second display window is selected, the selected menu is displayed as the third display window. 6. The method of claim 5, In the first state, the portable electronic device is provided in at least one of a transmission mode, a reception mode, a DMB mode, an mp3 mode, a camera mode, and a navigation mode, Wherein the portable electronic device is provided in at least one of a notebook mode, a DMB mode, a game mode, and an electronic dictionary mode in the second and third states. 6. The method of claim 5, And an input key for operating the fourth display window is provided on one side of the base housing facing the fourth display window in the third state. 9. The method of claim 8, Wherein the input key is provided in a Qwerty key arrangement. 9. The method of claim 8, Wherein the input key comprises a touch key. 3. The method of claim 2, The hinge unit includes: A first side hinge arm provided on at least one end of the base housing; A center hinge arm provided at one end of the second housing and coupled between the first side hinge arms; A second side hinge arm provided on the first housing and coupled to both ends of the first side hinge arm and coupled between the first side hinge arm and the center hinge arm; And And a rotation module provided on at least one side of the first and second side hinge arms and the center hinge arm for coupling and rotating the first and second side hinge arms and the center hinge arm, Wherein the portable electronic device is a portable electronic device. 12. The method of claim 11, Wherein the hinge module comprises a hinge shaft, a hinge cam, and a hinge spring provided at the one end of the hinge cam, the hinge shaft being opposed to the hinge shaft and the hinge shaft and providing a restoring force of the hinge cam. 12. The method of claim 11, Wherein the first, second, and third housings are electrically connected to the first, second, and central hinge arms through a flexible circuit board. The method according to claim 1, And a transmitting and receiving unit is provided on upper and lower ends of the first display window of the first housing.

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