KR101439554B1 - Method For Recognizing Touch Input And Apparatus For Performing The Same - Google Patents

Abstract

Disclosed is a touch input recognition method capable of easily recognizing a touch input input by a user and corresponding to various execution events to a predetermined touch input, and an apparatus for performing the same. The touch input recognition device is provided with at least one coordinate value corresponding to the touched trajectory and the size of the touch input, and determines an inflection point based on the provided at least one coordinate value, and determines a predetermined coordinate value of at least one coordinate value And determines the first symbol value based on the increasing / decreasing characteristic of the at least one coordinate value provided before the predetermined coordinate value in the case of the coordinate value of the inflection point. Further, the touch input recognizing device determines a second symbol value corresponding to the size of the provided touch input, and then determines an execution event corresponding to the determined first and second symbol values. Accordingly, since the execution event is determined by simultaneously considering the type of the touch input provided by the user and the size of the touch input, more various and detailed events can be executed by one touch input.

Touch screen, touch input, symbol, recognition

Description

TECHNICAL FIELD [0001] The present invention relates to a touch input recognizing method and a device performing the touch input recognizing method.

The present invention relates to a touch input recognition method, and more particularly, to a touch input recognition method applicable to a device having a touch screen and an apparatus for performing the same.

2. Description of the Related Art Recently, with the rapid development of processor technology, the increase of memory capacity, and the development of multimedia coding technology, functions included in mobile terminals such as mobile phones and PDAs (Personal Digital Assistants) have been diversified.

As the functions of the portable terminal are variously increased, menus for utilizing the functions provided in the portable terminal are increasing. Therefore, it is difficult to utilize various functions provided in the portable terminal by using only the conventional keypad having a fixed matrix arrangement .

In addition, in recent years, the application programs provided in the portable terminal have changed from numeric or text-based interfaces to graphically based interfaces, so that conventional graphic, application programs can not be efficiently used only by using numerals, characters or arrow keys, There is an increasing demand for a display device having a wider display screen while having a variety of image display functions such as multimedia playback and portable Internet functions.

In accordance with the above-mentioned trend, recently, a touch screen capable of simultaneously performing an input and a display in a single device without a separate keypad has been adopted in a portable terminal.

Since the touch screen can use the portable terminal intuitively and interactively only by touching a button or a graphic object displayed in the display area with a finger or a pen, the input operation is simplified and the interface object displayed for input is optimized for the application So that the user can easily recognize the input interface and can easily input the input interface.

In addition, since the display device and the touch pad are integrally installed, the touch screen does not need to include a separate space for installing the keypad as in the conventional portable terminal, so that a display device having a larger visible screen can be employed in a portable terminal have.

The touch screen can be classified into contact type capacitance type, infrared light sensing type, surface ultrasonic type, piezoelectric type, integral type tension measurement type, and resistive type. Among them, the touch screen has high transmittance, The resistance film method which is less influenced by the operating environment is generally used.

However, since a general portable terminal is manufactured in a small size for portability, the size of a touch screen provided in the portable terminal is also limited, and a number of menu items or applications There is a limit to the number of buttons for controlling the program.

In order to compensate for the above disadvantages, a touch input method of a touch screen included in a portable terminal includes a touch input method of simply inputting a menu or a button displayed on a touch screen, A method of selecting a predetermined menu or controlling the execution of a predetermined application program by providing a predetermined two-dimensional gesture such as a figure, a symbol and the like is used.

Korean Patent Publication No. 2007-05583 (a method and apparatus for generating one-dimensional signals using a two-dimensional pointing device) recognizes a trajectory of a two-dimensional gesture input by a user on a touch screen and generates a one-dimensional input Quot; a "

However, since Korean Patent Publication No. 2007-05583 uses a chirality-sensing function, an accumulation function, an extraction function, and a ballistic function to generate a one-dimensional output variable corresponding to a user-input two-dimensional gesture, There is a disadvantage that the processing load of the portable terminal is increased due to the complicated process. In addition, there is a disadvantage that the recognition accuracy may be lowered due to the complicated processing as described above.

Accordingly, it is a first object of the present invention to provide a touch input recognition method capable of easily recognizing a touch input inputted by a user, and associating various execution events with a predetermined touch input.

A second object of the present invention is to provide a touch input recognition device capable of easily recognizing a touch input input by a user and corresponding to various execution events in a predetermined touch input.

According to another aspect of the present invention, there is provided a touch input recognition method including: receiving at least one coordinate value corresponding to a touched trajectory and a size of a touch input; Determining an inflection point on the basis of at least one coordinate value received from the at least one coordinate value; and determining an inflection point based on at least one coordinate value provided before the predetermined coordinate value when the predetermined coordinate value of the at least one coordinate value is a coordinate value of the inflection point Determining a second symbol value corresponding to the magnitude of the provided touch input, and determining an execution event corresponding to the determined first and second symbol values . The step of determining an inflection point based on the provided at least one coordinate value may include calculating a difference between the first coordinate value and the second coordinate value among the first coordinate value and the second coordinate value sequentially provided at the predetermined time interval If the features are different, the first coordinate value may be determined as the coordinate value of the inflection point. The size of the touch input may be one of a magnitude of a touch pressure and a change amount of a capacitance corresponding to a touch input. The step of determining the second symbol value corresponding to the size of the provided touch input may determine the second symbol value based on a result of comparing the size of the touch input with a preset reference value. Wherein the step of determining an event corresponding to the determined symbol value comprises the steps of generating a symbol array composed of the first symbol value and the second symbol value, A symbol array that is the same as the generated symbol array can be searched in the database where one symbol array and the execution event corresponding to each of the at least one symbol array are stored.

According to another aspect of the present invention, there is provided a touch input recognition apparatus comprising: a touch screen for providing a coordinate value corresponding to a touched trajectory and a magnitude of a touch input at predetermined time intervals; At least one coordinate value and a touch input size are provided from the touch screen, and when at least one of the coordinate values provided is an inflection point, at least one coordinate value provided before the predetermined coordinate value, Determines a second symbol value corresponding to the magnitude of the provided touch input, and then determines an execution event corresponding to the determined first symbol value and the determined second symbol value And a control unit for searching the storage unit. Wherein when the first coordinate value and the second coordinate value provided sequentially from the touch screen at predetermined time intervals are different from each other in the increase / decrease characteristics of the first coordinate value and the second coordinate value, the control unit changes the first coordinate value to the inflection point As shown in FIG. The controller may determine the second symbol value based on a comparison result obtained by comparing the magnitude of the touch input with a preset reference value. The control unit may generate the symbol array composed of the first symbol value and the second symbol value and search the execution event by searching the symbol array which is the same as the generated symbol array in the storage unit.

According to the touch input recognizing method and the apparatus performing the touch input, when the coordinate values corresponding to the trajectory touched by the user and the magnitude of the touch input are provided at predetermined time intervals, the inflection point is determined based on the provided coordinate values, After determining the increase / decrease characteristic of the coordinate value, the symbol value is converted into a symbol value corresponding to the increase / decrease characteristic of the coordinate value. Also, the touch input size is compared with a preset reference value, and symbolized into a symbol value corresponding to the size of the touch input. Then, a symbol array composed of symbol values corresponding to the coordinate value and the touch input size is generated, and the same symbol array as the generated symbol array is searched in the database, and an event corresponding to the searched symbol array is executed.

Accordingly, since the event corresponding to the touch input provided by the user is searched based on the increase / decrease characteristic of the provided coordinate value and is executed, the processing load is small and the false recognition rate of the touch input can be reduced.

In addition, since the execution event is determined by simultaneously considering the type of the touch input provided by the user and the size of the touch input, there is an effect that more various and detailed events can be executed by one touch input.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail.

It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be interpreted in an ideal or overly formal sense unless explicitly defined in the present application Do not.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In order to facilitate the understanding of the present invention, the same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

Hereinafter, in the embodiment of the present invention, the touch screen is a pressure resistive touch screen capable of providing the coordinate value (X, Y) of the touched position and the magnitude of the pressure applied to the surface on the touch screen at the touch, The coordinate value (X, Y) of the touch input and the capacitance change amount corresponding to the touch input.

FIG. 1 is a conceptual diagram for explaining a touch input recognition process according to an embodiment of the present invention. In FIG. 1, a user draws a circle in a clockwise direction at a predetermined position of a touch screen.

Referring to FIG. 1 (a), when the user draws a circle clockwise starting from the first inflection point 10, the touch screen corresponds to a locus touched by the user at a predetermined time interval (X, Y). Here, the predetermined time interval may have a different value depending on the touch screen, for example, 20 ms.

The touch screen sequentially provides coordinate values corresponding to the touched trajectory every 20 ms starting from the coordinate values (1,8) of the first inflection point (10). For example, the touch screen displays coordinate values (1,8), (2,12), (5,14), (8,15) at 20 ms intervals from the first inflection point 10 to the second inflection point 20 And the increase / decrease characteristic of the coordinate value is determined from the provided coordinate value. That is, the increasing / decreasing characteristic of the coordinate values (X, Y) from the first inflection point 10 to the second inflection point 20 is determined by a predetermined coordinate value (for example, (5, 14) (+, +) Because the X value and the Y value of the coordinate value are both increased as compared with (2, 12), for example.

The increase / decrease feature of the coordinate values input between the second inflection point 20 and the third inflection point 30 in the same manner as described above is obtained by comparing a predetermined coordinate value with a previously provided coordinate value, (+, -) because the Y value has decreased.

The increase / decrease feature of the coordinate values inputted between the third inflection point 30 and the fourth inflection point 40 can be (-, -) because the X value and the Y value of the coordinate value are both decreased, The increase / decrease feature of the coordinate values input between the inflection point 40 and the first inflection point 10 can be (-, +) since the X value of the coordinate value decreases and the Y value increases.

As a result, as shown in FIG. 1, when the user draws a circle clockwise starting from the first inflection point 10, the increasing and decreasing feature of the provided coordinate value every predetermined time interval (for example, 20 ms) (+, -), (-, -), (-, +), and the above-described increase / decrease feature may be stored as an array by replacing with a preset symbol value.

In the embodiment of the present invention, when the X value or the Y value of the predetermined coordinate value is increased compared with the X value or the Y value of the previous coordinate value, . ≪ / RTI >

(+, -), (+, 0), (-, +), (-, -), (-, 0), (0, +) (0, -) and (0, 0), and each of the increase / decrease features may be symbolized by symbol values of A, B, C, D, E, F, G, .

For example, since the increase / decrease characteristics of the coordinate values corresponding to the locus of the circle shown in FIG. 1 (a) are (+, +), (+, -), (-, - A, B, E, and D, and the symbol values may be stored in an array form.

The touch input recognizing device searches the database stored in the storage unit for the same symbol array as the symbol array [A, B, E, D], and recognizes the touch input inputted by the user by executing an event corresponding to the searched symbol array And executes an event corresponding to the recognized touch input.

As described above, in the touch input recognition method according to the embodiment of the present invention, since the type of the touch input is determined based on the increase / decrease characteristic of the coordinate value between the inflection points, not only the type of the touch input but also the order and / It can be judged.

That is, even when the same type of touch input is provided, the order and / or direction of the touch input can be divided because the change characteristics vary according to the order and / or direction of the touch input. An execution event can be allocated so that more various events can be executed.

In the embodiment of the present invention, the inflection point means a point at which any one of the X value and the Y value of the coordinate value changes. For example, in FIG. 1 (a), the previous coordinate value of the second inflection point 20 is (5, 14), the coordinate value of the second inflection point is (8, 15) The increase / decrease characteristic changes from (+, +) to (+, -) on the basis of the second inflection point 20 because of the fact that the coordinates (8, 15) are the inflection points.

The symbol arrangement shown in FIG. 1 (a) can be expressed by a change graph as shown in FIG. 1 (b). In FIG. 1 (b), the increase / decrease characteristics of the coordinate values touched between the inflection points and the inflection points are displayed in a graph form.

In the method of recognizing a touch input according to an embodiment of the present invention, coordinate values (X, Y) of a touched trajectory from a touch screen and a size Z of a touch input are simultaneously received, The size can be considered at the same time to enable more diverse and granular events.

Here, the magnitude (Z) of the touch input may be the magnitude of the touch pressure when the touch screen is a pressure resistive membrane type, and the magnitude of the capacitance change corresponding to the touch input when the touch screen is a capacitive type .

Specifically, the touch input device sets a reference value for the size of the touch input, and divides the size of the touch input into two types by comparing the size Z of the touch input provided from the touch screen with the reference value. In addition, the size of the divided touch input can be symbolized according to a predetermined symbolization method.

For example, when the size Z of the touch input provided from the touch screen is equal to or smaller than the reference value, the size of the touch input is represented by '1' (that is, Z = 1) , The size of the touch input can be displayed as '2' (that is, Z = 2).

FIG. 2 is a graphical representation of coordinate values and touch input sizes provided from a touch screen in the touch input recognition process according to an embodiment of the present invention.

As shown in FIG. 2, the coordinate values (X, Y) and the magnitude (Z) of the touch input provided from the touch screen can be simultaneously displayed in a graph. The increasing / decreasing characteristic of the coordinate value between the inflection points is symbolized by a predetermined symbol value. At the same time, the size of the touch input is converted into a symbol value corresponding to the size of the touch input according to a predetermined symbolizing method .

The touch input recognizing device recognizes the type of the touch input and the size of the touch input through the generated symbol array after generating the symbol array with the symbol value of the increase / decrease characteristic between the inflection points and the symbol value with respect to the touch input size, And executes the event.

For example, if the coordinate values (X, Y) and the touch input size (Z) provided from the touch screen are as shown in FIG. 2, a symbol consisting of symbol values of the magnitude of the touch- The array is [(A, 1), (B, 1), (E, 2), (D, 2)].

The touch input recognizing apparatus searches the database for the same symbol array as the generated symbol array [(A, 1), (B, 1), (E, 2), (D, 2) A row event can be determined.

For example, the touch input recognizing apparatus recognizes the type of the touch input corresponding to the symbol arrangement as a circle touched in the clockwise direction based on the contents stored in the database, and a part of the circle (i.e., from the third inflection point 30 to the fourth Inflection point 10) is larger than a preset reference value, and can execute the corresponding event.

3 is a flowchart illustrating a touch input recognition process according to an exemplary embodiment of the present invention.

Referring to FIG. 3, when power is applied to a touch input recognizing apparatus having a touch screen, the touch input recognizing apparatus initializes a symbol array value j (j = 0) (step 301).

Then, when the user provides a predetermined touch input to the touch screen, the touch screen displays coordinate values (X, Y) corresponding to the touched trajectory and size Z of the touch input at predetermined time intervals (for example, 20 ms) (Step 303).

Here, the magnitude (Z) of the touch input may be the magnitude of the touch pressure when the touch screen is a pressure resistive membrane type, and the magnitude of the capacitance change corresponding to the touch input when the touch screen is a capacitive type .

Then, the touch input device compares two consecutively inputted coordinate values among the coordinate values sequentially provided to determine the increase / decrease characteristic of the coordinate value (step 305).

In addition, the touch input recognizing device judges an inflection point based on the increase / decrease feature of the provided coordinate values (step 307), and when a predetermined coordinate value among the provided coordinate values is determined as an inflection point, A symbol value corresponding to the increase / decrease feature of the coordinate values provided before the inflection point among the symbol values is determined (step 309).

Also, the touch input recognizing device compares the provided touch input size Z with a predetermined reference value to determine a symbol value corresponding to the size of the touch input (step 311).

If it is determined in step 307 that it is not an inflection point, the process returns to step 303 and steps 303 to 307 are repeatedly performed.

Steps 309 and 311 may be performed in a reversed order, and may be performed at the same time.

Also, the symbolization process of the touch input size performed in step 311 may be symbolized in various ways according to the number of execution events to be associated with one touch input.

For example, when the touch input size is symbolized by two symbol values, one reference value is set and the touch input size Z is compared with a reference value. If the touch input size Z is smaller than the reference value, (For example, 1), and when the touch input size Z is larger than the reference value, it may be set to a second symbol (for example, 2).

Alternatively, when the size of the touch input is symbolized into three symbol values, a first reference value and a second reference value are set. When the touch input size Z is compared with a reference value, (For example, 2) when the touch input size Z is between the first reference value and the second reference value, and when the touch input size Z is between the first reference value and the second reference value, And may be set to a third symbol (e.g., 3) when the touch input size Z is larger than the second reference value.

Then, the touch input recognizing device generates a symbol array composed of the symbol values corresponding to the inputted coordinate value and the touch input size determined in steps 309 and 311 (step 313), and increases the symbol array value j J = j ++) (step 315).

The touch input recognizing device searches the previously stored database for the same symbol array as the symbol array generated in step 313 (step 317), and determines whether the symbol array exists in the database (step 319).

Here, the touch input recognizing apparatus may include a database storing various types of symbol arrangements, touch input types corresponding to respective symbol arrangements, execution event information, and the like.

If it is determined in step 319 that there is a symbol array in the database, the touch input recognition apparatus determines whether an execution event corresponding to the symbol array can be determined (step 321), and determines an execution event corresponding to the symbol array If it is determined that the event is possible, the execution event is executed (step 323).

If it is determined that the symbol array determined in step 319 does not exist in the database, or if it is determined in step 321 that the execution event corresponding to the symbol array can not be determined, the process returns to step 303 and an execution event corresponding to the user's touch input is determined Steps 303 to 321 are repeatedly performed until the time t is reached.

Alternatively, in another embodiment of the present invention, the number of times of execution of steps 303 to 321 may be counted, and an error message may be displayed in the display area of the touch screen when the counted value is equal to or greater than a predetermined value.

In the method of recognizing touch input according to an embodiment of the present invention shown in FIG. 3, the size Z of the touch input provided on the touch screen is symbolized into a predetermined symbol value and then a symbol array is generated In another embodiment of the present invention, it may be configured to perform a predetermined execution event in proportion to the size Z of the provided touch input, without symbolizing the size Z of the touch input provided on the touch screen.

For example, when the user draws a circle clockwise on the touch screen, the graphic information displayed on the touch screen can be scrolled upward and the scroll speed can be changed in proportion to the size of the touch input drawing the circle.

Alternatively, when the user draws a circle in a counterclockwise direction on the touch screen, the graphic information displayed on the touch screen may be scrolled downward and the scroll speed of the touch input may be changed in proportion to the size of the touch input.

FIG. 4 is a block diagram showing a configuration of a touch input recognizing apparatus according to an embodiment of the present invention. FIG. 4 illustrates a portable terminal as an example of a touch input recognizing apparatus.

4, a portable terminal for performing a touch input recognition method according to an exemplary embodiment of the present invention includes a touch screen 410, a control unit 420, a storage unit 430, a microphone 440, a speaker 450, And a wireless transmission / reception unit 460.

The touch screen 410 may be a pressure resistive touch screen or a capacitive touch screen. When the touch screen 410 is a pressure resistive film type, the coordinate values (X, Y) corresponding to the touched trajectory and the magnitude of the touched pressure are provided to the control unit 420, The control unit 420 can provide the coordinate values (X, Y) corresponding to the touched trajectory and the amount of change in the capacitance corresponding to the touch input.

In addition, the touch screen 410 displays a graphical user interface screen such as a menu of the portable terminal, an execution screen of the executed application program, or the like based on the control of the controller 420.

When the coordinate value (X, Y) is provided from the touch screen 410 at predetermined time intervals in accordance with the touch input of the user, the control unit 420 compares the two coordinate values continuously input, Determines an inflection point based on the determined increase / decrease feature, and determines a symbol value corresponding to the increase / decrease feature of the coordinate values provided before the inflection point when the predetermined coordinate value is determined as the inflection point.

The control unit 420 compares the touch input size Z provided from the touch screen 410 with a preset reference value to determine a symbol value corresponding to the magnitude of the touch input

Then, the control unit 420 generates a symbol array composed of symbol values corresponding to the input coordinate value and the touch input size, and then searches for a symbol array, which is the same as the generated symbol array, Determines execution events corresponding to the type and size of the touch input, and executes the determined execution events.

The function of the controller 420 as described above may be performed by the touch input processing module 421, which may be implemented by a software program, or may be implemented by a separate semiconductor chip.

The control unit 420 may include a voice codec 423 for processing voice data transmitted and received during a voice call. The voice codec 423 receives the user's voice provided from the microphone 440, converts the received voice into a digital signal, encodes the converted digital signal to conform to the voice communication standard, and provides the encoded voice to the wireless transceiver 460, To be transmitted to the portable terminal of the other party.

The voice CODEC 423 decodes the voice of the other party provided from the portable terminal of the voice communication partner through the wireless transmission / reception unit 460, converts the voice into an analog signal, and provides the voice to the speaker 450.

The storage unit 430 may be a nonvolatile memory such as a flash memory, an EEPROM (Electrically Erasable and Programmable Read Only Memory), or the like, and may store at least one symbol array and a touch corresponding to each of the at least one symbol array A database composed of input type and / or execution event information is stored.

The microphone 440 receives a voice of a user during a voice call, converts the voice of the caller into an electric signal, and provides the voice to the control unit 420. Also, the speaker 450 receives the voice signal of the voice communication partner decoded from the voice codec 423 and outputs it as a signal of an audible frequency band.

The wireless transceiver 460 may include a duplexer, a high-frequency processor, and an intermediate-frequency processor. The wireless transceiver 460 may receive a radio frequency (RF) signal from the antenna ANT Converts a radio frequency signal received and received through the duplexer into an intermediate frequency and then converts the radio frequency signal into a baseband signal to provide the baseband signal to the control unit 420, Converts the intermediate frequency signal into an intermediate frequency signal, and converts the intermediate frequency signal into a radio frequency signal again, and provides the signal to the antenna ANT through the duplexer.

Alternatively, the wireless transmitting / receiving unit 460 may use a direct conversion method of directly demodulating a high frequency signal received without frequency conversion, instead of the heterodyne receiving method of demodulating the high frequency signal as described above through an intermediate frequency conversion into a baseband signal have.

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 as defined in the appended claims. It will be possible.

FIG. 1 is a conceptual diagram for explaining a touch input recognition process according to an embodiment of the present invention.

FIG. 2 is a graphical representation of coordinate values and touch input sizes provided from a touch screen in the touch input recognition process according to an embodiment of the present invention.

3 is a flowchart illustrating a touch input recognition process according to an exemplary embodiment of the present invention.

4 is a block diagram showing the configuration of a touch input recognizing apparatus according to an embodiment of the present invention.

Description of the Related Art

410: touch screen 420: control unit

421: Touch input processing module 430:

Claims (9)

A touch input recognition method performed in a portable terminal including a touch screen, Obtaining at least one coordinate value of a touch signal according to a predetermined time interval in a touched trajectory and a magnitude of a touch input of the touch signal; Determining an inflection point based on the at least one coordinate value; Determining a first symbol value based on an increase / decrease feature of at least one coordinate value obtained before the predetermined coordinate value when the predetermined coordinate value of the at least one coordinate value is the coordinate value of the inflection point; Determining a second symbol value based on a magnitude of a magnitude of a touch input of the touch signal acquired at the time interval and a magnitude of a preset reference value; And And determining an execution event corresponding to the determined first symbol value and the determined second symbol value. The method of claim 1, wherein determining the inflection point based on the at least one coordinate value comprises: When the first coordinate value and the second coordinate value sequentially obtained at the time intervals are different from each other in the increase / decrease characteristics of the first coordinate value and the second coordinate value, the first coordinate value is determined as the coordinate value of the inflection point Wherein the touch input is a touch input. The touch input recognizing method according to claim 1, wherein the size of the touch input is one of a magnitude of a touch pressure and a change amount of a capacitance corresponding to a touch input. delete 2. The method of claim 1, wherein determining an event corresponding to the determined symbol value comprises determining an execution event corresponding to the determined first and second symbol values, Generating a symbol array composed of the first symbol value and the second symbol value; And Searching for a symbol array identical to the generated symbol array in a database storing at least one symbol array and an execution event corresponding to each of the at least one symbol array. A touch screen for acquiring a coordinate value corresponding to a touched trajectory and a magnitude of a touch input at predetermined time intervals; A storage unit for storing a list of execution events; And Determining a first symbol value based on an increasing / decreasing feature of at least one coordinate value provided before the predetermined coordinate value when a predetermined coordinate value of the acquired at least one coordinate value is an inflection point, And a control unit for determining a corresponding second symbol value based on a comparison result of the size of the input and a magnitude of a preset reference value and searching for the execution event corresponding to the determined first symbol value and the determined second symbol value in the storage unit Touch input recognition device. 7. The apparatus of claim 6, wherein the control unit When the first coordinate value and the second coordinate value sequentially obtained at the time interval from the touch screen are different from each other in the increasing and decreasing characteristics of the first coordinate value and the second coordinate value, Value of the touch input. delete 7. The apparatus of claim 6, wherein the control unit Generates a symbol array composed of the first symbol value and the second symbol value, and searches the execution event by searching for a symbol array identical to the generated symbol array in the storage unit.

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