KR100749205B1 - User interfacing method for portable digital apparatus and portable digital apparatus thereof - Google Patents

Abstract

The present invention relates to a user interfacing method of a portable digital device and a portable digital device. The portable digital device according to the present invention rotates, scrolls, enlarges, or rotates an image displayed through a display device based on rotation information generated using a rotation sensor built in a portable digital device displaying a predetermined image. Can be shrunk. Accordingly, it is possible to improve the inconvenience of the user interface of the portable digital device, such as operation of the terminal with one hand.

Portable digital devices, rotation information, user interface, scrolling

Description

User interfacing method for a portable digital device and a portable digital device TECHNICAL FIELD

1 is a block diagram of a portable digital device according to the present invention;

2 is a view illustrating an example of rotation information of the present invention;

3 is a view showing an example of rotational movement of a portable digital device;

4 is a view provided to explain a method of rotating an image;

5 is a view provided to explain a method of moving an image;

6 is a view provided to explain a method of enlarging / reducing;

7A and 7B illustrate an example of a rotated image;

8 is a view showing an example of an f (Roll) value or a f (Pitch) value corresponding to a roll value or a pitch value;

9 is a flowchart provided to explain the operation of the portable digital device according to the present invention.

<Description of Main Parts in Drawings>

101: rotation sensor unit 103: storage medium

105: memory 107: image processing unit

109: control unit 111: display unit

The present invention relates to a user interfacing method of a portable digital device and a portable digital device. More particularly, the present invention relates to a portable digital device that converts a motion in a three-dimensional space of the portable digital device into a user interface input such as a mouse or a direction key. A user interfacing method and apparatus therefor.

Many users are using personal digital devices such as mobile phones, personal digital assistants (PDAs), and portable multimedia players (PMPs), and many multimedia contents are supplied.

The user interface of such a portable digital device is mostly a direction key or a button for pointing the displayed pointer in four directions. Furthermore, due to the limitations of the body area of portable digital devices, these user interfaces are considerably smaller. Accordingly, portable digital devices have some limitations in user interface.

In addition, when the user is carrying the other object with one hand, the user of the portable digital device may not be able to page through or scroll properly when using the e-book or using the Internet. Mostly.

Therefore, various interface methods or devices that can overcome the user interface limitations of portable digital devices have to be developed.

An object of the present invention is to provide a user interface method of a portable digital device and a portable digital device for converting a movement in a three-dimensional space of the portable digital device into a user interface input such as a mouse or a direction key.

It is another object of the present invention to scroll, rotate, enlarge, or reduce an image displayed based on the magnitude of a rotational motion in a three-dimensional space of a portable digital device. In providing.

In order to achieve the above object, a user interface method of a portable digital device according to the present invention comprises: displaying a portion of original data as a first image through a display unit; at least one axis orthogonal to each other in a three-dimensional space with a rotation axis Detecting the movement of the main body by generating rotation information, the rotation angle of which is rotated, and a second transformed by at least one method of scrolling, rotating, enlarging and reducing the first image based on the rotation information. Generating an image and displaying the second image.

The original data includes at least one of an image, text, and graphics, and preferably has a larger data amount than the number of pixels of the display unit.

In the generating of the second image, the second image may be periodically generated based on the rotation information.

According to another embodiment, the method may further include calculating the displacement of the rotation information by comparing the rotation information generated in the step of detecting the movement of the main body with the rotation information previously generated and stored, and generating the second image. In operation, when the displacement of the rotation information occurs, the second image may be generated based on the displacement.

According to another embodiment, the generating of the second image may generate the second image only when the value of the rotation information is equal to or greater than a preset threshold.

According to another embodiment of the present disclosure, the method may further include receiving input of whether the rotation information is valid by a user's manipulation of generating a signal corresponding to one of at least two levels, and generating the second image. The step may generate the second image only when the rotation information is valid.

The method may further include mapping each pixel of the display unit to a predetermined two-dimensional coordinate system represented by an x-axis and a y-axis, and mapping the original data to the coordinate system in units corresponding to the pixels of the display unit. It may include. Accordingly, the generating of the second image may include changing the coordinates of the original data according to the rotation information, extracting a value corresponding to the coordinates of the display unit from the changed coordinates of the original data, and generating the second image. Can be generated.

The generating of the second image may include a coordinate value of one of an x-axis and a y-axis of the original data corresponding to an angle rotated in a predetermined direction based on one axis on the horizontal plane. It can be changed by adding or subtracting, and if one of the cases where the angle is 0 ° to 90 ° and the angle is 270 ° to 360 ° adds a coordinate value, the other one is preferably subtracted. Do.

The generating of the second image may include a plane perpendicular to a horizontal plane of 0 ° and an x-axis and y-axis of the original data corresponding to an angle rotated in a predetermined direction based on one axis on the vertical plane. The rotated second image may be generated by changing an axis coordinate value.

The generating of the second image may include setting a plane perpendicular to a horizontal plane to 0 ° and multiplying a predetermined magnification according to an angle rotated in a predetermined direction based on one axis on the vertical plane. The enlarged or reduced second image may be generated by changing the x-axis and y-axis coordinate values of.

A portable digital device according to another embodiment of the present invention includes a rotation sensor unit, a display unit, an image processor and a controller. The rotation sensor unit generates and outputs rotation information that is an angle at which the main body is rotated with at least one axis orthogonal to each other on a three-dimensional space, and the display unit receives a predetermined image signal and displays the image for visual recognition. The processing unit receives predetermined video data, converts it into the video signal for display on the display unit, and outputs the converted video signal. The controller may be configured to scroll, rotate, enlarge, and reduce the first image based on the rotation information while outputting the image data such that a part of predetermined original data is displayed on the display unit as the first image. Image data for the deformed second image is generated and output to the image processor.

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

1 is a block diagram of a portable digital device according to the present invention, FIG. 2 is a diagram illustrating an example of rotation information of the present invention, and FIG. 3 is a diagram illustrating an example of a rotation movement of the portable digital device. to be.

Referring to FIG. 1, the portable digital device 100 of the present invention may include a rotation sensor unit 101, a storage medium 103, a memory 105, an image processor 107, a controller 109, and a display 111. Include.

The portable digital device 100 according to the present invention senses its position and movement displacement in a three-dimensional space and recognizes it as a preset user input regarding the rotation and movement of an image displayed on the screen of the display unit 111. do. In other words, a direction key (not shown) for changing an image displayed on a screen, such as a page turning, scrolling, or display of a portion of an image having one or more screens that are not displayed on the screen. In response to an operation such as a mouse or a scroll key, the user of the present invention can replace such an operation by moving the portable digital device 100 itself.

The portable digital device 100 of the present invention corresponds to a mobile phone, a personal digital assistant (PDA), a portable multimedia player (PMP), a portable game machine, and other portable digital terminals, and FIG. 1 is a configuration necessary for proper description of the present invention. The configuration except for this is omitted.

The rotation sensor unit 101 includes at least one rotation sensor, and detects the rotational movement of the portable digital device 100 in a three-dimensional space and outputs it to the controller 109.

The rotation sensor unit 101 preferably includes three rotation sensors. This is because the three-dimensional space can be represented by three axes that are orthogonal to each other, and the rotational movement of the portable digital device 100 can be represented by a combination of rotational movements about each axis. Each rotation sensor outputs rotational displacement of the portable digital device 100 based on one of the axes orthogonal to each other, and a gyroscope is preferable.

Gyroscopes can include optical gyroscopes, mechanical gyroscopes, piezoelectric vibratory gyroscopes, and microscopic micro gyroscopes using Micro Electro Mechanical System (MEMS) technology.

The rotation sensor unit 101 outputs predetermined rotation information obtained by converting an analog signal output from each rotation sensor into a digital signal. Therefore, if three rotation sensors are included, three rotation information may be included.

First, the rotation information will be described with reference to FIGS. 2 and 3. FIG. 2 is based on the case where the rotation sensor unit 101 includes three rotation sensors and outputs three rotation information.

Referring to FIG. 2, three pieces of rotation information are a pitch value, a roll value, and a yaw value in units of degrees, respectively, based on the x, y, and z axes. It is one rotation angle. In the following, rotation information is expressed as (pitch value, roll value, yaw value).

Here, x, y, and z axes which are orthogonal to each other may be arbitrarily determined, but a plane formed by two axes among the x, y, and z axes is parallel to the screen a of the display unit 111, and in addition thereto. The x-axis, the y-axis, and the z-axis preferably pass through the center b of the screen a. The description below is based on the case where the plane formed by the x-axis and the y-axis is parallel to the screen a, and the z-axis is a direction perpendicular to the display portion 111.

Pitch value, roll value and yaw value are clocks while looking at the (-) limit on the (+) limit on each axis as the portable digital device 100 rotates about each reference axis as shown in FIG. The rotation angle calculated in the direction. At this time, the angle of the pitch value, the roll value and the yaw value is an absolute value based on the horizontal plane and the gravitational direction (0 °), and the reference does not vary depending on the position and state of the portable digital device 100.

 The rotation sensor unit 101 may remove and output noise that may be included in an output signal of the rotation sensor.

The remaining components of the portable digital device 100 will be described again with reference to FIG. 1.

The storage medium 103 corresponds to a flash memory, a hard disk, and the like, and stores multimedia content such as various electronic documents and map information processed by the portable digital device 100.

The memory 105 includes various active and inactive memories, and various programs or data of the portable digital device 100 may be stored.

The image processor 107 receives image data output from the controller 109, converts the image data into an image signal for the display unit 111, and outputs the image signal to the display unit 111.

The display unit 111 displays the image signal transmitted from the image processing unit 107 so that the user can visually recognize it. The display 111 may correspond to an LCD, an organic light emitting diode (PDP), a plasma display panel (PDP), or a cathode ray tube (CRT).

The controller 109 converts a predetermined electronic document, an electronic map, an image, or the like into predetermined image data to be displayed to the user through the display unit 111 and outputs the same to the image processing unit 107 according to the control of the user.

The controller 109 uses the rotation information received from the rotation sensor unit 101 to generate the rotated and / or scrolled image or the electronic document of the original image or the electronic document, and rotate and move (scroll) the display through the display 111. ), The image data outputted to the image processor 107 is converted to display an enlarged or reduced image.

However, according to an embodiment of the present disclosure, the controller 109 may not only generate and display the converted image each time periodically receiving the rotation information, but also B

Hereinafter, the operation of the controller 109 will be described with reference to FIGS. 4 and 5.

4 is a diagram provided to explain a method of rotating an image, and FIG. 5 is a diagram provided to explain a method of moving an image. 4 and 5 assume that a part of the image c having a larger number of pixels than the number of pixels of the screen of the display unit 111 is displayed through the screen of the display device. For example, when a screen having a video graphics adapter (VGA) display format is 640 x 480 pixels, the size of an image is 1280 x 960 pixels. In addition, an electronic document composed of text and / or graphics rather than an image is applicable to several pages, but such electronic documents are mainly subject to scrolling.

Referring to FIG. 4, the display unit 111 initially displays a part of the image c as the image 1 (a1). Then, the display unit 111 displays the image 2 (a2) rotated by an angle d about the center b1 of the image 1 (a1).

Referring to FIG. 5, the display unit 111 initially displays a part of the image c as the image 3 (a3). Then, the display unit 111 displays an image 4 (a4) in which the image 3 (a3) is moved by the horizontal axis by e and the vertical axis by f. Referring to FIG. 2, the center b2 of the image 3 (a3) is parallel moved by e on the y axis and f on the y axis. Image 5 (a5) is an image in which image 3 (a3) is moved to the left in parallel.

In order to obtain the converted image, the present invention maps each pixel of the display unit 111 to a predetermined two-dimensional coordinate system, and maps the original image to the same two-dimensional coordinate system in units corresponding to the pixels of the display unit 111. Then, the controller 109 obtains the new coordinates converted based on the rotation information.

The controller 109 maps predetermined coordinates based on the center of the original image or the electronic document, and generates an image which is rotated or scrolled by converting these coordinates by using the rotation information read from the rotation sensor unit 101. do. To this end, the controller 109 obtains the coordinates of the rotated image by using one of three rotation information transmitted from the rotation sensor unit 101, and obtains the coordinates of the scrolled image by combining the remaining two rotation information. Herein, the coordinate value is an image coordinate corresponding to each pixel of the display unit 111, and the coordinate of the center of the original image is preferably set to [0, 0].

For example, when the rotation information is (0 °, 15 °, 45 °), assuming that the coordinates of the rotated image are obtained using the yaw value (45 °) based on the z-axis, the following equation 1 Same as

Here, Yaw is a yaw value of the rotation information, (x, y) is a coordinate value of the image 1 (a1) before rotation, and (x ', y') is a coordinate value of the rotated image 2 (a2).

In this conversion process, when there are non-integer coordinate values among the converted coordinate values (x ', y'), rounding may be performed.

The controller 109 performs transformation of Equation 1 on all data of the original image to map new data to each coordinate. When the coordinates of the display device are from (-320, -240) to (320,240), a new image is generated by using the data of the corresponding coordinates newly obtained by the controller 109.

FIG. 6 is a view provided to explain a method of enlarging / reducing, and illustrates a method of enlarging or reducing according to a yaw value which is information rotated about a z-axis.

The controller 109 may use one of the rotation information received from the rotation sensor unit 101 to rotate the image. For example, the controller 109 may generate an enlarged or reduced image based on the yaw value of the three pieces of rotation information, as previously set.

However, if the rotation image is to be previously displayed using the yaw value, it is necessary to distinguish whether the image is to be enlarged or reduced. For example, a separate button (not shown) can be placed to create valid conditions for zooming in and out. Accordingly, the controller 109 may create an enlarged or reduced image of the current image by using the yaw value read during the operation of the button.

The controller 109 may obtain the coordinates of the enlarged or reduced image by converting the coordinates of the existing image by using a predetermined conversion equation. Equation 2 below shows an example of a coordinate conversion equation for an enlarged or reduced image.

Here, z is an enlargement / reduction factor and (x'y ') is a coordinate of an enlarged or reduced image.

According to an embodiment of the present invention, the z value may be as shown in Table 1 below.

Required value z value 0 ° ≤ yaw <15 ° One 15 ° ≤ yaw <30 ° 1.1 30 ° ≤ yaw <45 ° 1.2 45 ° ≤ yaw <60 ° 1.3 60 ° ≤ yaw <75 ° 1.4 75 ° ≤ yaw <90 ° 1.5 90 ° ≤ yaw <270 ° One 270 ° ≤ yaw <285 ° One 285 ° ≤ yaw <300 ° 0.6 300 ° ≤ yaw <315 ° 0.7 315 ° ≤ yaw <330 ° 0.8 330 ° ≤ yaw <345 ° 0.9 345 ° ≤ yaw <360 ° One

Referring to Table 1, when the portable digital device 100 rotates clockwise with respect to the z axis as shown in FIG. 3, the image is enlarged, and when rotated counterclockwise, the image is reduced. The controller 109 may be able to enlarge or reduce the image only when the critical angle (15 ° in Table 1) is greater than or equal to the critical angle, and the enlargement or reduction may not be performed when the yaw value is 90 ° to 275 °. Can be.

7A and 7B illustrate an example of a rotated image.

FIG. 7A illustrates a case in which the screen size of the display unit 111 in the VGA display format is 640 x 480 pixels and the image size is 1280 x 960 pixels. The coordinate of the center of the image c1 was made [0,0]. The display unit 111 displays an image 6 (a6) including a center.

Referring to FIG. 7B, when the portable digital device 100 rotates clockwise, a yaw value of rotation information is generated. Accordingly, the control unit 109 obtains the rotated image c2 rotated by the new coordinate value [x'y '] obtained through Equation 1, and accordingly outputs the new image data to the image processing unit 107. Image 7 (a7) is displayed.

The controller 109 compensates for overlapping or empty pixels in the process of making the rotated image c2 by converting it to a real number instead of integer coordinates, and rounding and integerization. For example, when pixels overlap, an average value may be used, or an empty pixel may be generated as an average value of neighboring pixels with respect to empty pixels.

In addition, when displaying the rotated image 7 (a7), the controller 109 stores the rotated image c2 in the memory 105 or the storage medium 103 as it is, while keeping the original image or the electronic document. ) Can be stored separately. This is because the pixels of the rotated image c2 may be distorted by the rotation transformation. Therefore, whenever the controller 109 receives the yaw value from the rotation sensor unit 101, the controller 109 may control to generate a rotated image converted from the original image c1.

In addition, the controller 109 obtains the coordinate values of the new scrolled image by using the roll value and the pitch value. The controller 109 periodically reads the roll value and the pitch value, and displays the converted image every time the roll value is read, or displays the converted image in a period different from the reading period.

The coordinate values of the new image are obtained through the following Equations 3 and 4, and thus an image converted by the x-axis displacement e and / or the y-axis displacement f can be obtained. To this end, the control unit 109 may be set by the user in the movement direction and the movement speed corresponding to the roll value or the pitch value.

Here, Roll is a roll value of rotation information, x is the x coordinate value of the image of the image 3 (a3) before scrolling, and x 'is the x coordinate value of the image of the scrolled image 4 (a4). f (Roll) is the magnitude of the x-coordinate value to be moved in one conversion and the direction of movement (+ or-) of the x-coordinate value corresponding to the roll value.

Here, Pitch is a pitch value of rotation information, y is a y coordinate value of the image of the image 3 (a3) before scrolling, and y 'is a y coordinate value of the image of the scrolled image 4 (a4). f (Pitch) is the magnitude of the y-coordinate value to be moved in one conversion and the direction of movement (+ or-) of the y-coordinate value corresponding to the pitch value.

FIG. 8 is a diagram illustrating an example of an f (Roll) value or a f (Pitch) value corresponding to a roll value or a pitch value, respectively. Hereinafter, f (Roll) value and f ( Pitch) is explained. Here, the arrow indicates the visual direction of the user, the arrow g1 is the user's visual direction when rotating about the y-axis, and the arrow g2 is the visual direction of the user when rotating about the x-axis.

Referring to FIG. 8, the portable digital device 100 may rotate 360 degrees about the center point b. Here, 0 degrees to 360 degrees is an absolute angle with respect to the horizontal plane, and corresponds to a pitch value or a roll value output from the rotation sensor unit 101. However, based on the visual direction of the user indicated by the arrow g1, when the user is not able to check the display content in the range of 90 degrees to 270 degrees, the scroll image becomes meaningless, and thus, no conversion value may be generated. . 8 is shown based on the visual direction indicated by arrows g1 or g2.

In FIG. 8, f () becomes f (Pitch) or f (Roll), and d is a preset coordinate value. For example, d is 5, and f (Roll) when the Roll is 15 degrees is -d, so a coordinate of -5 from the current x coordinate value is used as the x coordinate value for a new image.

In order to apply FIG. 8 to the conversion of the x-coordinate value according to Equation 3, a case of obtaining a value of f (Roll) corresponding to each roll value will be described. When the user tilts the portable digital device 100 clockwise with respect to the y-axis of FIG. 2 while the image 3 (a3) is displayed (0 <roll ≤ 90), the original image as shown in the image 5 (a5) Left or right side of (c) (set to 'left' here), thus displaying an image of f (Roll) <0. On the contrary, when the portable digital device 100 is tilted in the counterclockwise direction (270 <roll <360), the image of the right side (f (Roll)> 0) of the original image c is displayed as shown in the image 5 (a5). do. Therefore, when the roll value is 25 degrees, the converted x-coordinate value becomes x '= x-10 (d = 5) by Equation 3, so that an image in which the original image is scrolled by about 10 to the left may be displayed.

When the portable digital device 100 maintains the roll value at 25 degrees, an image which continuously scrolls to the left by 10 at a predetermined period may be displayed. Accordingly, as shown in FIG. 8, the displacement of the x-coordinate value varies according to the roll value, and the degree of scrolling per predetermined period varies according to the tilt of the portable digital device, so that the scrolling speed of the image is increased or slowed down.

According to an embodiment, the f () value corresponding to 90 degrees to 180 degrees may be mapped in consideration of the arrow g3 direction, which is the visual direction of the lying user.

The controller 109 displays the scrolled image by outputting the image data for the image scrolled to the new coordinate value [x'y '] obtained through Equations 3 and 4 to the image processor 107. Accordingly, the portable digital device 100 may display another portion of the image as shown in FIG. 4, or display another page or scrolled portion of the electronic document including text, graphics, and images.

The controller 109 obtains the rotated image first and then the rotated image based on the rotated image if it is necessary to obtain both the rotated image and the scrolled image, such as the illustrated rotation information (0 °, 15 °, 45 °). Can be obtained. According to an embodiment, only one of the rotated image and the scrolled image may be displayed according to a user's setting.

 The control unit 109 according to another embodiment of the present invention is based on the yaw value, roll value, or pitch value as long as the yaw value, roll value, or pitch value is maintained based on when the yaw value, roll value, and pitch value are 0 degrees. You can continue to convert the image to display. In this case, if the portable digital device 100 is inclined at a predetermined slope, the displayed image will continue to change.

According to another embodiment, in applying the equations 3 and 4 to the roll value and the pitch value, only the displacement with the previous rotation information may be used without using the output of the rotation sensor unit 101 as it is. Therefore, if the portable digital device 100 maintains a certain angle, the controller 109 does not generate the converted image.

According to another embodiment, the controller 109 may generate the converted image by rotating or scrolling only when the displacement of the yaw value, the roll value, and the pitch value is equal to or greater than a predetermined threshold value.

According to another embodiment, the portable digital device 100 of the present invention has a separate input unit (not shown) such as a button so that the user can display the deformed image using only rotation information while the user operates the corresponding button. can do.

In the previous description, the rotation image is converted using the yaw value based on the axis of FIG. 2, but this is only one example, and it is possible to form an axis differently from FIG. 2, and other than the yaw value. The rotated image can be displayed using the value.

9 is a flowchart provided to explain the operation of the portable digital device according to the present invention. Hereinafter, operations of the portable digital device 100 will be described with reference to FIGS. 1 to 9. Similarly, three rotation information pitch values, roll values, and yaw values are used.

The rotation sensor unit 101 outputs the rotation information generated by detecting the rotation degree of the portable digital device in the three-dimensional space to the controller 109 by using three rotation sensors (S801).

The control unit 109 controls the image processing unit 107 to display a part of the original image or the electronic document through the display unit 111, and when receiving the rotation information from the rotation sensor unit 101, By transforming data corresponding to each coordinate to data of new coordinates converted according to the rotation information, a deformed image or an electronic document is generated. The controller 109 generates a new image using the data newly mapped to the fixed coordinates of the display device, for example, (-320, -240) to (320,240) (S803).

The controller 109 outputs the transformed image data to the image processor 107, and the image processor 107 outputs an image signal corresponding to the received image data to the display unit 111 so that the converted image is displayed ( S805).

By the above method, the portable digital device of the present invention operates.

The invention can be implemented in methods, devices and systems. In addition, when the present invention is implemented in computer software, the components of the present invention may be replaced with code segments necessary for performing necessary operations. The program or code segment may be stored on a medium that can be processed by a microprocessor and transmitted as computer data coupled with carrier waves via a transmission medium or communication network.

Media that can be processed by the microprocessor can transfer and store information such as electronic circuits, semiconductor memory devices, ROMs, flash memories, EEPROMs, floppy disks, optical disks, hard disks, optical fibers, and wireless networks. It includes. Computer data also includes data that can be transmitted over electrical network channels, optical fibers, electromagnetic fields, wireless networks, and the like.

In addition, although the preferred embodiment of the present invention has been shown and described above, the present invention is not limited to the above-described specific embodiment, the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

As described above, according to the present invention, a portable digital device displaying a predetermined image rotates, scrolls, and scrolls an image displayed through its display device based on rotation information generated using a built-in rotation sensor. You can zoom in or out.

When the user displays an image that cannot be displayed as one image through the portable digital device according to the present invention, the user can see the rest of the image by simply moving the portable digital device without any other operation. In addition, when a user wants to read an electronic document, the user may scroll the electronic document vertically or horizontally by moving the portable digital device.

Therefore, the user can eliminate the inconvenience in the user interface of the small portable digital device, such as the operation of the terminal with one hand.

Claims (22)

Displaying a part of original data as a first image through a display unit; Generating rotation information which is an angle at which the main body is rotated on at least one axis orthogonal to each other on a three-dimensional space; Detecting the movement of the main body by calculating a displacement of the rotation information by comparing the generated rotation information with previously generated rotation information; Generating a second image deformed by at least one of scrolling, rotating, enlarging, and reducing the first image based on the displacement when the displacement of the rotation information occurs; And Displaying the second image; and the user interfacing method of a portable digital device. The method of claim 1, And the original data includes at least one of an image, text, and graphic, and has a data amount larger than the number of pixels of the display unit. The method of claim 1, Generating the second image, And periodically generating the second image based on the rotation information. delete The method of claim 1, In the generating of the second image, the second image is generated only when the value of the rotation information is equal to or greater than a preset threshold. The method of claim 1, And receiving, by the user's manipulation of generating a signal corresponding to one of at least two levels, whether the rotation information is valid. The generating of the second image may include generating the second image only when the rotation information is valid. The method of claim 1, Mapping each pixel of the display unit to a predetermined two-dimensional coordinate system represented by x and y axes, and mapping the original data to the coordinate system in units corresponding to the pixels of the display unit. Generating the second image, According to the rotation information, the user interface method of the portable digital device, characterized in that for changing the coordinates of the original data, and extracting a value corresponding to the coordinates of the display unit from the coordinates change the original data to generate the second image . The method of claim 7, wherein Generating the second image, A horizontal plane is set to 0 °, and the coordinate value of one of the x-axis and the y-axis of the original data is added or subtracted to correspond to an angle rotated in a predetermined direction based on one axis on the horizontal plane. User interface method of portable digital device. The method of claim 8, The method of adding or subtracting the coordinate value may include subtracting the coordinate value when one of the cases where the angle is 0 ° to 90 ° and when the angle is 270 ° to 360 ° adds the coordinate value. A user interface method of a portable digital device. The method of claim 7, wherein Generating the second image, The second image rotated by changing the x-axis and y-axis coordinate values of the original data corresponding to an angle rotated in a predetermined direction based on one axis on the vertical plane with 0 ° as a plane perpendicular to the horizontal plane. The user interface method of a portable digital device, characterized in that for generating. The method of claim 7, wherein Generating the second image, A plane perpendicular to the horizontal plane is set to 0 °, and multiplied by a predetermined magnification according to an angle rotated in a predetermined direction based on one axis on the perpendicular plane, thereby changing and expanding the x and y axis coordinate values of the original data. Or generating the reduced second image. A rotation sensor unit for generating and outputting rotation information which is an angle at which the main body is rotated with at least one axis orthogonal to each other on a three-dimensional space; A display unit for receiving a predetermined video signal and displaying the same so as to be visually recognized; An image processor which receives predetermined image data and converts the image data into the image signal for display on the display unit; And While outputting the image data such that a part of predetermined original data is displayed on the display unit as a first image, the rotation information generated by the rotation sensor unit is generated and compared with the rotation information stored therein, and the displacement of the rotation information is calculated. And generating image data for the second image obtained by transforming the first image by at least one of scroll, rotation, enlargement, and reduction based on the displacement when the rotation information is generated and outputting the image data to the image processor. A portable digital device comprising a control unit. The method of claim 12, And the original data includes at least one of an image, text, and graphics, and has a data amount greater than the number of pixels of the display unit. The method of claim 12, The controller may generate image data for the second image periodically based on the rotation information. delete The method of claim 12, And the controller generates image data for the second image only when the value of the rotation information is equal to or greater than a preset threshold. The method of claim 12, And an input unit configured to receive a user's manipulation for generating a signal corresponding to one of at least two levels. The controller may generate image data for the second image when a predetermined value among the levels is input from the input unit. The method of claim 12, The control unit, Mapping each pixel of the display unit to a predetermined two-dimensional coordinate system represented by x and y axes, and mapping the original data to the coordinate system in units corresponding to the pixels of the display unit. According to the rotation information, the portable digital device, characterized in that for changing the coordinates of the original data, and extracting a value corresponding to the coordinates of the display unit from the coordinates change the original data to generate the image data for the second image . The method of claim 18, The control unit, And a coordinate value of one of the x-axis and the y-axis of the original data is added or subtracted according to an angle rotated in a predetermined direction based on one axis on the horizontal plane. The method of claim 19, When the coordinate value is added or subtracted, one of the case where the angle is 0 ° to 90 ° and the case where the angle is 270 ° to 360 ° adds the coordinate value, the other one subtracts the coordinate value. Portable digital device, characterized in that. The method of claim 18, The control unit rotates by changing the x-axis and y-axis coordinate values of the original data corresponding to an angle rotated in a predetermined direction based on one axis on the vertical plane with 0 ° as the plane perpendicular to the horizontal plane. And generating image data for the second image. The method of claim 18, The control unit sets a plane perpendicular to the horizontal plane to 0 °, and multiplies a predetermined magnification according to an angle rotated in a predetermined direction based on one axis on the vertical plane, whereby the x-axis and y-axis coordinate values of the original data are obtained. And generating the second image which is enlarged or reduced by changing a value.

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