KR101436091B1 - Button-selection apparatus and method based on continuous trajectories of pointer - Google Patents

Abstract

There is provided a button selecting apparatus and method capable of selecting a button based on a continuous trajectory of a pointer.

The button selection device according to the embodiment of the present invention may include a display unit for displaying a keyboard including a plurality of buttons and a button for selecting a button where a button selection operation is performed based on a result of analyzing a movement trajectory of a pointer moving on the keyboard, In order.

Pointer, movement trajectory, button, selection, keyboard

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a button selecting apparatus and method based on continuous trajectory of a pointer,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to button selection, and more particularly, to a button selection apparatus and method capable of selecting a button by a continuous trajectory of a pointer.

Although the keyboard is one of the most widely used input means due to its ease of use, it has a certain hardware size and can only be used in a static environment such as a desk, there is a problem.

As a method for solving such a problem, a software keyboard for inputting characters has been provided by displaying a keyboard on the screen of a portable device and selecting a displayed key using a pen or a finger.

As a method of selecting a button through a software keyboard, a tapping method, that is, a method of placing a pen on a button desired by the user, and then pressing and releasing the button is widely used.

Such a method is not only troublesome in selecting a button, but also requires a plurality of buttons, such as a telephone number input, to be sequentially turned on and off in order to repeatedly press and release a corresponding button, There is a problem that the speed of character input is hindered.

Therefore, there is a need to provide a technique for increasing the convenience of the user in button selection and improving the speed of button selection.

An object of the present invention is to provide an apparatus and method for selecting a button based on a continuous trajectory of a pointer that can improve the speed of button selection when a button is selected using a keyboard displayed on the screen.

However, the objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

The button selection device according to the embodiment of the present invention may include a display unit for displaying a keyboard including a plurality of buttons and a button for selecting a button where a button selection operation is performed based on a result of analyzing a movement trajectory of a pointer moving on the keyboard, In order.

A button selection method according to an embodiment of the present invention includes displaying a keyboard including a plurality of buttons and displaying a button at a position where a button selection operation is performed based on a result of analyzing a movement trajectory of a pointer moving on the keyboard In turn, selecting.

According to the apparatus and method for selecting buttons by the continuous trajectory of the pointer according to the embodiment of the present invention, the following effects can be obtained.

Since the button can be selected without the operation of pressing and releasing the button, the button selection is easy, and the button selection speed can be improved.

When a button is selected using a three-dimensional mouse, it is possible to prevent an unintended button from being selected because the pointer is out of position of a desired button due to camera shake.

The details of the other embodiments are included in the detailed description and the drawings, and the advantages and features of the present invention and the method of achieving them will be clarified with reference to the embodiments described later in detail with reference to the accompanying drawings.

The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to block diagrams or process flowcharts for explaining an apparatus and method for selecting buttons according to continuous trajectories of pointers according to embodiments of the present invention. At this point, it will be appreciated that the combinations of blocks and flowchart illustrations in the process flow diagrams may be performed by computer program instructions. These computer program instructions may be loaded into a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, so that the instructions, performed by a processor of a computer or other programmable data processing apparatus, Thereby creating means for performing the functions.

These computer program instructions may also be stored in a computer usable or computer readable memory capable of directing a computer or other programmable data processing apparatus to implement the functionality in a particular manner so that the computer usable or computer readable memory The instructions stored in the block diagram (s) are also capable of producing manufacturing items containing instruction means for performing the functions described in the flowchart block (s).

The computer program instructions may be loaded onto a computer or other programmable data processing equipment so that a series of operating steps may be performed on the computer or other programmable data processing equipment to create a computer- It is also possible for the instructions to perform the processing equipment to provide steps for executing the functions described in the flowchart block (s).

In addition, each block may represent a module, segment, or portion of code that includes one or more executable instructions for executing the specified logical function (s). It should also be noted that in some alternative implementations, the functions mentioned in the blocks may occur out of order. For example, two blocks shown in succession may actually be executed substantially concurrently, or the blocks may sometimes be performed in reverse order according to the corresponding function.

FIG. 1 is a diagram showing a configuration of a button selection device (hereinafter referred to as a "button selection device") according to a continuous trajectory of a pointer according to an embodiment of the present invention.

The button selection device 100 may include a display unit 150, a storage unit 140, a pointing unit 110, an analysis unit 120, and a selection unit 130.

The display unit 150 may display a pointer and a keyboard on which a plurality of buttons are arranged. The keyboard may include, for example, a keyboard for English input and a keyboard for Hangul input. In the case of a keyboard for English input, each button may have, for example, a standard English arrangement (Qwerty keyboard) as shown in FIG. In the case of a keyboard for Hangul input, each button may have, for example, a standard Hangul alphabet arrangement as shown in FIG.

As another example, the plurality of buttons may be arranged such that when the button is selected by the continuous trajectory of the pointer, the number of turns of the pointer is increased. For example, they may be arranged in the form as illustrated in FIG. Specifically, in the case of a button for consonant input (hereinafter, referred to as a consonant button), consonant buttons assigned consonants having similar shapes can be arranged in the same row. For example, each consonant button corresponding to 'ㄲ', 'ㄱ', and 'ㅋ' can be arranged in the same row. In the case of the vowel buttons, the angle between the vowels ('ㅗ' + 'ㅐ') buttons constituting the vowel sounds (for example, 'ㅙ') may be arranged to have an acute angle. It should be noted that the button arrangement illustrated in FIG. 4 is merely an example for explaining the embodiment of the present invention, and may have another arrangement.

When the keyboard as shown in Fig. 2 or Fig. 3 is displayed, the user can select the button by performing the pre-designated button selecting operation using the pointing means 110. Fig. Here, the button selecting operation may be, for example, a tapping operation, a linear operation, and a circular operation. The tapping operation refers to an operation of depressing and releasing a button to be selected. In the linear operation, the direction of movement of the pointer in the button to be selected is abruptly changed, and the movement trajectory of the pointer before the change of direction, This means that the movement trajectory of the pointer has an acute angle. The circular motion means an operation of circularly drawing the movement locus of the pointer within the button to be selected. 5 illustrates button selection operations according to an embodiment of the present invention.

Referring again to FIG. 1, the display unit 150 may display a command processing result of the user in addition to the keyboard. For example, the character corresponding to the button selected by the user may be displayed. For example, the display unit 150 may be a liquid crystal display (LCD).

The storage unit 140 may store a location information table. For example, when one character is assigned to each button of the keyboard, the position information table 600 may include positional information corresponding to buttons and buttons of the keyboard (e.g., A boundary value, coordinates included in the button region). As another example, if a plurality of characters are assigned to each button of the keyboard, and the corresponding characters are input according to the number of times the buttons are consecutively selected, the position information table 700 includes An assigned character, a number of button selection times necessary to select the character, and position information of each button. The storage unit 140 may include a cache, a read only memory (ROM), a programmable ROM (PROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM) A non-volatile memory device such as a flash memory or a volatile memory device such as a random access memory (RAM), but the present invention is not limited thereto.

The pointing means 110 is a means for moving the position of the pointer displayed through the display unit 150 and includes a pointing means using a relative coordinate system such as a mouse, a tablet, and a touch pad, Such as a pointing device, may include pointing means using an absolute coordinate system. The pointing means 110 may provide a movement locus of the motion to the analysis unit 120, which will be described later, when a motion occurs by the user.

The analysis unit 120 may analyze the movement trajectory provided from the pointing means 110 to determine the type of the button selection operation performed by the user and the number of times the corresponding button selection operation has been performed. The analysis unit 120 may include a sampling unit 121, a conversion unit 122, a calculation unit 123, and a detection unit 124.

The sampling unit 121 may sample the inputted trajectory at a predetermined unit length. For example, when the inputted trajectory is the same as that shown in FIG. 8A, the sampling unit 121 can sample the trajectory as a unit length as shown in FIG. 8B.

The converting unit 122 may convert the moving trajectory sampled by the sampling unit 121 into a plurality of direction vectors. Specifically, the transforming unit 122 may convert the two sampled coordinates into a plurality of direction vectors, as shown in FIG. 8C, by connecting two adjacent coordinates. Thus, by converting the sampled motion locus into a plurality of direction vectors, it is possible to correct a variety of speeds for inputting the locus for each user.

The calculation unit 123 may calculate an angle change amount for each of the direction vectors. Specifically, the calculation unit 123 can calculate the angle at which the specific direction vector changes with respect to the previous direction vector, as shown in (d) of FIG. At this time, the calculation result for each direction vector may be provided to the detection unit 124, which will be described later.

The detecting unit 124 can detect the type of the button selecting operation and the number of times the button selecting operation is inputted from the inputted trajectory based on the calculation result provided from the calculating unit 123. [

Specifically, the detection unit 124 can first determine whether the inputted trajectory is a linear trajectory including an acute angle. For this, the detection unit 124 may set the first section based on the starting point of the entire movement trajectory. Next, it can be determined whether or not the N (= natural number) direction vectors included in the first section satisfy Equation (1).

Specifically, when the sum of the angular variation amounts? _I of N direction vectors among the calculation results supplied from the calculation section 123 is equal to or greater than the first threshold value T ₁ and the maximum angular variation Is equal to or greater than the second threshold value (T ₂ ), the detecting unit 124 can determine the inputted trajectory as a linear trajectory including an acute angle. That is, it can be determined that the button selection operation performed by the user is a linear operation. Here, the first threshold value T ₁ and the second threshold value T ₂ may be experimentally determined.

If the expression (1) is not satisfied, the detection unit 124 can determine whether the inputted trajectory is a circular trajectory. For this, the detection unit 124 may set the second section (> = the first section) based on the starting point of the entire movement trajectory. Then, the detection unit 124 can determine whether or not the M (= natural number) direction vectors included in the second section satisfy Equation (2).

Specifically, after summing the angular variation amounts? _I of the M direction vectors among the calculation results supplied from the calculation unit 123, the result obtained by taking the absolute value is 360 degrees or more, and the direction by M direction vectors The detection unit 124 can determine the inputted trajectory as a circular trajectory. Alternatively, if the result obtained by taking the absolute value is 360 degrees or more after adding the variation amounts? _{I of the} M direction vectors, and the direction by the M direction vectors is counterclockwise, the detection unit 124 detects The movement locus can be discriminated by the circular locus. That is, it can be determined that the button selection operation performed by the user is a circular operation. At this time, the detection unit 124 may detect the number of times the circular operation has been performed.

If the expression (2) is not satisfied, the detecting unit 124 may set the first section on the basis of the point shifted by a predetermined distance at the starting point of the entire movement trajectory, and repeat the above-described determination process. As described above, the determination result by the detection unit 124 (i.e., the type of the button selection operation and the number of times the button selection operation is input) can be provided to the selection unit 130, which will be described later.

The selection unit 130 may receive a result of the determination from the detection unit 124, and then may refer to the previously stored location information table 600 to select a button corresponding to the position where the button selection operation occurred. For a more detailed description, FIG. 10 will be referred to.

First, when the button selection operation is determined as a linear operation, the selection unit 130 checks the position information table 600 and confirms whether or not there is a button including coordinates corresponding to a point where the direction of the movement trajectory changes . As a result, if there is a button, the selection unit 130 can select the corresponding button (see FIG. 10 (b)). If the direction changes more than once in the same button, the corresponding button is selected at the first direction change point, and the subsequent direction change is regarded as a change in the direction for moving to another button, and can be ignored (C)).

If the button selection operation is determined to be a circular operation, the selection unit 130 can check the position information table 600 to check whether or not there is a button including coordinates corresponding to the center point of the circular locus. As a result of checking, if there is a button, the corresponding button can be selected (see Fig. 10 (d)). At this time, if the round operation is repeated two or more times, the corresponding button can be selected by the number of repetitions (see (e) of FIG. 10).

When a button is selected by the selection unit 130, the result of the command processing can be displayed through the display unit 150. [ For example, characters corresponding to the selected button may be input to the input window 10. At this time, a visual and / or audible method can be used so that the user can recognize the selected button. For example, by highlighting a selected button or outputting a sound informing of a button selection, the user can be provided with feedback on button selection.

11 is a flowchart illustrating a button selection method according to an embodiment of the present invention. In the following description, for convenience of description, a case where any one of the keyboards shown in Figs. 2, 3, and 4 is displayed through the display unit 150 will be described as an example.

First, when a moving locus is inputted through the pointing means 110 (S910), the input locus can be analyzed (S920).

The analyzing step includes the steps of sampling the input moving trajectory at a predetermined unit length, converting the sampled moving trajectory to a plurality of direction vectors, and calculating an angle variation amount for each of the plurality of direction vectors can do.

When the angle change amount is calculated for a plurality of direction vectors, the type of the button selection operation can be determined according to whether or not the calculated angle change amount satisfies a pre-designated criterion.

In step S930, it is determined whether the input trajectory is a linear trajectory including an acute angle in step S930. If the input trajectory is not a linear trajectory in step S930, (S950). ≪ / RTI >

When it is determined that the inputted trajectory is a moving trajectory including an acute angle (S930), the above-mentioned expression (1) can be used as a judgment criterion. That is, if the sum of angular variations of the N direction vectors included in the first section is greater than or equal to the first threshold value T ₁ with respect to the starting point of the input moving trajectory, If it is equal to or larger than the threshold value (T ₂ ), the inputted trajectory can be determined as a linear trajectory including an acute angle. If the inputted trajectory is determined to be a linear trajectory including an acute angle, the button selection operation performed by the user can be determined to be a linear operation.

In this case, the position information table 600 can be checked, and it can be confirmed whether or not there is a button corresponding to a point where the direction of the input movement trajectory changes suddenly (S940).

If it is determined that the button exists (S980, YES), the corresponding button can be selected (S990). If the button does not exist (S980, NO), the moving locus is continuously inputted through the pointing means 110 (S910), and the analysis can be performed (S920).

On the other hand, when it is judged that the inputted trajectory is a circular trajectory (S950), the above-mentioned expression (2) can be used as a judgment criterion. That is, after summing the angular variations of the M direction vectors included in the second section with respect to the starting point of the entire input moving trajectory, the result obtained by taking the absolute value is 360 degrees or more, and the direction by M direction vectors is Direction (or counterclockwise direction), the input moving trajectory can be determined as a circular trajectory.

If the inputted trajectory is discriminated as a circular trajectory (S950, YES), an operation of detecting the number of times the circular trajectory is inputted can be performed (S960).

Thereafter, the position information table 600 is checked to confirm whether or not there is a button corresponding to the center point of the circular locus (S970).

If it is determined that the button does not exist (S970, NO), the moving locus is received through the pointing means 110 (S910) and analyzed (S920).

If it is determined that the button exists (S970, YES), the corresponding button can be selected as many times as the detected number (S990). At this time, if only one character is assigned to the corresponding button, the character can be selected for the detected number of times. For example, if only 'A' is assigned to the corresponding button on the corresponding button and the detected number of times is twice, 'A' can be selected twice. As a result, 'a' can be displayed through the display unit 150. If two or more characters are assigned to the corresponding button, the character corresponding to the detected number may be selected. Specifically, as in the location information table 700 shown in FIG. 7, three Korean consonants 'A', 'K', and 'K' are assigned to the first button, and when the first button is selected once , 'A' is selected, and if the first button is selected twice in succession, 'ㄲ' is selected. In this case, if the first button includes the coordinates corresponding to the center point of the circular locus as a result of checking the position information table 700, and if the detected number of times is three, 'ke' may be selected.

12 to 14 illustrate a process of selecting a plurality of buttons according to an embodiment of the present invention and a movement trajectory of a pointer when a button is selected.

12 is a diagram illustrating a method of inputting the English word 'SON' and a movement trajectory of a pointer when the corresponding English word is input. In order to input 'SON', first touch the electronic pen with the button assigned to 'S', and then move the electronic pen while drawing the locus to the button assigned 'O'. Then, the direction of the movement trajectory is changed in the button to which 'O' is assigned, and the electronic pen is moved while drawing the locus to the button to which 'N' is assigned. Then, the electronic pen is detached, and the contact between the electronic pen and the button to which 'N' is assigned is released. When the movement trajectory is drawn as described above, since the direction of the movement trajectory is rapidly changed in the button to which 'O' is assigned, 'O' can be inputted because it is recognized that the linear operation has been performed. 'N' can be input at the moment when the electronic pen is dropped from the button to which 'N' is assigned.

13 is a diagram illustrating a method of inputting the English word 'APPLE' and a movement trajectory of a pointer when the corresponding English word is input. To enter 'APPLE', first touch the electronic pen to the button assigned 'A' to position the pointer, then move the electronic pen while drawing the locus to the button to which 'P' is assigned. Then, draw a circular trajectory twice in the button to which 'P' is assigned, and then move to the button assigned to 'L' while drawing the trajectory. After entering 'L' assigned button, we change the direction of movement of the pointer twice, then move to the button assigned 'E', while drawing the locus. Then, the electronic pen is removed, and the contact between the electronic pen and the button to which "E" is assigned is released.

In this movement trajectory, 'A' can be input at the moment of contact with the electronic pen. If the circular trajectory is drawn twice on the button to which 'P' is assigned, the circular motion is recognized as being input twice, and 'P' can be inputted twice. When the direction of the movement trajectory changes first in the direction of the movement trajectory in the button assigned with 'L', 'L' may be inputted at the time of the first change of the direction of the movement trajectory. At this time, the point at which the direction of the movement locus changes secondly is for the direction change of the movement locus, and can be ignored. In addition, 'E' can be inputted at the moment when the contact between the button to which 'E' is assigned and the electronic pen is released. The same result can be obtained even when a circular trajectory is drawn twice instead of changing the direction of the movement trajectory twice in the button to which 'L' is assigned in the movement trajectory. That is, 'APPLE' may be input to the input window 10.

FIG. 14 is a diagram illustrating a method of inputting Hangul 'onboard' and a movement trajectory of a pointer when a corresponding word is input. First, the electronic pen is brought into contact with the button to which the consonant '?' Is assigned. Then, after moving the electronic pen while drawing a trajectory up to the button to which the vowel 'a' is assigned, the direction of the movement trajectory is changed, and the electronic pen is moved to the button to which the consonant 'b' is assigned. Then, the direction of the movement trajectory is changed, and the electronic pen is moved by drawing the locus to the button to which the consonant 'X' is assigned. Then, after changing the direction of the movement trajectory twice within the button to which the 'C' is assigned, the electronic pen is moved to draw the trajectory up to the button to which the vowel 'ㅐ' is assigned. Then, the electronic pen is detached, and the contact between the electronic pen and the button to which 'ㅐ' is assigned can be released.

When the movement trajectory is drawn as described above, 'I' can be input at the moment of contact with the electronic pen. Since the direction of the movement trajectory changes abruptly in the button to which 'a' is assigned and the button to which 'b' is assigned, 'a' and 'f' can be inputted in order, respectively. In the button to which 'i' is assigned, the direction of the movement trajectory changes twice, and 'i' can be input at the time when the direction of the movement trajectory first changes. At this time, the second direction change can be ignored. Finally, 'ㅐ' can be entered at the moment when the button area and the electronic pen are released from contact.

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, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

FIG. 1 is a diagram illustrating a button selection apparatus according to an embodiment of the present invention.

2 is a diagram showing a keyboard according to a standard English arrangement.

3 is a diagram showing a keyboard according to a standard Korean alphabet array.

4 is a view showing an example in which the arrangement of each button is modified according to the embodiment of the present invention.

5 is a diagram illustrating a button selection operation according to an exemplary embodiment of the present invention.

6 is a diagram illustrating a location information table according to an embodiment of the present invention.

7 is a diagram illustrating a location information table according to another embodiment of the present invention.

8 is a diagram illustrating a button selection operation determination process according to an embodiment of the present invention.

9 is a diagram illustrating a process of discriminating a circular motion during a button selection operation according to an embodiment of the present invention.

10 is a view for explaining a button selection criterion according to an embodiment of the present invention.

11 is a flowchart illustrating a button selection method according to an embodiment of the present invention.

12 is a diagram illustrating a word input method and a movement trajectory of a pointer when the English word 'SON' is input according to an embodiment of the present invention.

FIG. 13 is a diagram illustrating a word input method and a movement trajectory of a pointer when an English word 'APPLE' is input according to an embodiment of the present invention.

14 is a diagram illustrating a word input method and a movement trajectory of a pointer when a word 'onboard' is input according to an embodiment of the present invention.

Description of the Related Art

100: Button selection device 110: Pointing means

120: Analysis unit 121: Sampling unit

122: conversion unit 123: calculation unit

124: Detector 130:

140: storage unit 150: display unit

Claims (20)

A display unit for displaying a keyboard including a plurality of buttons; An analyzer for analyzing a movement trajectory of a pointer moving on the keyboard and detecting at least one of a type of button selection operation and a number of times the button selection operation is input; And And a selection unit that sequentially selects a button at a position at which the button selection operation occurs based on a result of analyzing a movement trajectory of the pointer, The analyzing unit, A sampling unit for sampling the movement trajectory of the pointer by a unit length; A transform unit for transforming the sampled motion locus into a plurality of direction vectors; A calculation unit for calculating an angular variation of the plurality of direction vectors with respect to a previous direction vector; And And a detector for detecting at least one of a type of the button selecting operation and a number of times the button selecting operation is inputted based on the calculated amount of angular change. delete delete The method of claim 1, A tapping operation that is an operation of pressing and releasing a button to be selected, a linear operation that draws a linear locus such that the movement locus of the pointer moves at an acute angle in the button to be selected, and a circular operation that draws a circular locus in the button to be selected Wherein the at least one button comprises at least one pointer. 5. The apparatus according to claim 4, A result obtained by adding the angular variation amounts of N (= natural number) direction vectors included in the first section on the basis of the starting point in the movement trajectory converted into the plurality of direction vectors is equal to or greater than a first threshold value, And the button selection operation according to the movement trajectory is determined as a linear operation when the amount of change is equal to or greater than the second threshold value. 6. The apparatus according to claim 5, Wherein a button corresponding to a position at which the linear motion occurs is referenced with a position information table including position information of the plurality of buttons and the plurality of buttons. 5. The apparatus according to claim 4, (N = natural number) directional vectors included in a second section with respect to a starting point in a moving trajectory converted into the plurality of directional vectors, and then obtaining an absolute value of 360 degrees or more, Wherein the button selection operation according to the movement trajectory is determined as a circular motion and the number of times the circular motion is input when the direction vectors are clockwise or counterclockwise. 8. The apparatus according to claim 7, Wherein a button corresponding to a position where the circular motion occurs is selected by the number of times by referring to a position information table including position information on the plurality of buttons and the plurality of buttons. 9. The apparatus according to claim 8, And a button corresponding to a center point of the movement locus is selected by the number of times. 9. The apparatus according to claim 8, And when a plurality of characters are assigned to a button corresponding to a center point of the movement trajectory, selects a character corresponding to the number of times of the plurality of characters. Displaying a keyboard including a plurality of buttons; Analyzing a movement trajectory of a pointer moving on the keyboard to detect at least one of a type of button selection operation and a number of times the button selection operation is input; And And sequentially selecting a button at a position where the button selection operation has occurred based on a result of analyzing a movement trajectory of the pointer, Wherein the detecting comprises: Sampling the movement trajectory of the pointer by a unit length; Transforming the sampled moving trajectory into a plurality of direction vectors; Calculating an angular variation with respect to a previous direction vector for the plurality of direction vectors; And And detecting at least one of a type of the button selecting operation and a number of times the button selecting operation is inputted based on the calculated amount of angular change. delete delete 12. The method as claimed in claim 11, A tapping operation that is an operation of pressing and releasing a button to be selected, a linear operation that draws a linear locus such that the movement locus of the pointer moves at an acute angle in the button to be selected, and a circular operation that draws a circular locus in the button to be selected Wherein the at least one button comprises at least one button. 15. The method of claim 14, Detecting at least one of the type of the button selecting operation and the number of times the button selecting operation is inputted based on the calculated amount of angular change, A result obtained by adding the angular variation amounts of N (= natural number) direction vectors included in the first section on the basis of the starting point in the movement trajectory converted into the plurality of direction vectors is equal to or greater than a first threshold value, And determining that the button selection operation according to the movement trajectory is a linear operation when the amount of change is equal to or greater than the second threshold value. 16. The method of claim 15, Selecting a button corresponding to a position at which the linear operation occurred by referring to a positional information table including positional information on the plurality of buttons and the plurality of buttons, . 15. The method of claim 14, Detecting at least one of the type of the button selecting operation and the number of times the button selecting operation is inputted based on the calculated amount of angular change, (N = natural number) directional vectors included in a second section with respect to a starting point in a moving trajectory converted into the plurality of directional vectors, and then obtaining an absolute value of 360 degrees or more, Determining a button selection operation based on the movement trajectory as a circular motion when the direction vectors are clockwise or counterclockwise; And And detecting the number of times the circular motion is input. 18. The method of claim 17, Selecting a button corresponding to a position at which the circular motion has occurred by referring to a position information table including position information on the plurality of buttons and the plurality of buttons, How to select a button. 19. The method of claim 18, Wherein the step of selecting the button corresponding to the position where the circular motion occurred, And selecting a button corresponding to a center point of the movement trajectory by the number of times. 19. The method of claim 18, Wherein the step of selecting the button corresponding to the position where the circular motion occurred, And selecting a character corresponding to the number of times of the plurality of characters when a plurality of characters are assigned to a button corresponding to a center point of the movement trajectory.

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