KR101447293B1 - Apparatus comprising touch screen and control method thereof - Google Patents

Abstract

The present invention relates to a terminal equipped with a touch screen and a control method thereof. A terminal having a touch screen according to the present invention and performing a predetermined function according to a touch input on the touch screen includes a first storage unit for storing a basic correction value for touch screen coordinates in advance; A second storage unit for storing a final correction value for the touch screen coordinates; A coordinate correction mark is displayed on the touch screen in accordance with a user's coordinate correction menu selection, and when there is a touch input on the touch screen on which the coordinate correction mark is displayed, the coordinate value of the position at which the coordinate correction mark is displayed The touch screen coordinate temporary correction value is calculated using coordinate values generated according to the touch input, and the calculated touch screen coordinate temporary correction value and the basic correction value stored in the first storage unit are averaged to obtain a touch screen coordinate final correction value And if the touch input is on the touch screen in a state that the touch screen input function is activated, the touch screen input unit stores the touch screen coordinate final correction value stored in the second storage unit, And a controller for performing error correction to determine the coordinates of the touch input position The.

Description

TECHNICAL FIELD [0001] The present invention relates to a terminal having a touch screen and a control method thereof.

The present invention relates to a terminal having a touch screen and a control method thereof, and more particularly, to a terminal having a touch screen configured to more accurately perform coordinate input calibration of a touch screen and a control method thereof.

2. Description of the Related Art Generally, portable and fixed electronic devices include an input interface for receiving a user's command and a display unit for displaying a screen operated according to a user's command.

For example, the portable wireless communication terminal device includes a key button for menu setting and the like, and an LCD (Liquid Crystal Display) for displaying a menu setting screen is provided.

In order to simplify the portable communication terminal device, the size of the entire terminal is reduced. Accordingly, the user is also making the key button, which is the input interface, small.

However, a key button, which is a user input interface, is inconvenient for a user to operate if its size is too small. That is, even if the size of the terminal is reduced, the size of the input interface such as a key button can not be reduced indefinitely.

On the other hand, a personal computer is equipped with an input device such as a mouse, so that a graphic user interface can be more conveniently utilized. On the other hand, a small portable terminal device such as a mobile phone has a mouse and a mouse The connection of such additional input devices is undesirable.

However, for example, in order to select a predetermined menu displayed on the display unit, pressing the up, down, left, and right buttons one by one to move the cursor to the position of a desired menu is a factor that deteriorates user convenience.

Accordingly, a technique for utilizing a touch screen has been proposed to solve the above-described problem, that is, a problem of limitation of the size of a key button and a problem of deterioration of a user's convenience in a graphic user interface.

That is, the number of key buttons of the terminal can be reduced by using a touch screen in which the input device and the output device of the terminal are combined, and a predetermined function is performed by the user's touch input on the touch screen. Therefore, The user interface can be used to the fullest.

Due to the convenience of the touch screen, more and more terminals, especially mobile terminals, are inclined to include a touch screen.

However, due to its structure, the touch screen is configured to attach a thin touch panel on a general display unit such as an LCD to perform a predetermined function according to a user's touch input, and there is a slight error in the coordinates of the display unit and the coordinates of the touch panel .

For example, when a button image is displayed on the display unit so that the user can select (click) the corresponding button image on the touch panel, the button image is displayed on the display unit with the coordinates of the position The user actually thinks that the button image has been clicked. Actually, the operation according to the button image selection does not occur. Instead, the user must click another area around the button image to perform the operation corresponding to the button image selection This is what happens.

This may be caused by a slight gap in the process of attaching the touch panel to a display unit such as an LCD as described above, or may be caused by non-linearity of the touch panel formed of resistance components.

Accordingly, in order to solve such a problem, a terminal user equipped with a touch screen must perform the coordinate calibration process of the touch screen first after purchasing the corresponding terminal.

If the user clicks (touches) the center point of the mark while the coordinate calibration mark is displayed on the touch screen, the terminal displays the coordinates of the coordinate calibration mark displayed on the touch screen and the coordinates And a coordinate correction value corresponding to the difference between the coordinate input by the touch input unit and the coordinate input by touch.

However, when coordinate correction is performed by such a conventional method, a correct coordinate correction value can be calculated only if the user selects an accurate center point of a coordinate calibration mark displayed on the touch screen. The correct correction value is calculated because the user can not accurately select the correction value. Accordingly, in using the actual touch screen, a difference between the coordinate of the button image displayed on the touch screen and the coordinates of the touch input by the actual user Error continues to occur, resulting in user complaints.

In the conventional calibration process, a new correction value is calculated every time. When the user can not properly click the center point of the calibration mark in the calibration process, the calibration process is performed several times. It can not be calculated.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a terminal having a touch screen capable of calculating a correct correction value for correcting a coordinate error of a touch screen and a control method thereof will be.

According to an aspect of the present invention, there is provided a terminal having a touch screen according to the present invention and performing a predetermined function according to a touch input on the touch screen,

A first storage unit in which a basic correction value for the touch screen coordinates is preset and stored; A second storage unit for storing a final correction value for the touch screen coordinates; A coordinate correction mark is displayed on the touch screen according to a user's coordinate correction menu selection and when there is a touch input on the touch screen on which the coordinate correction mark is displayed, the coordinate value The touch screen coordinate temporary correction value and the basic correction value stored in the first storage unit are averaged to calculate a touch screen coordinate final correction value And if the touch input is on the touch screen in a state that the touch screen input function is activated, the touch input is performed using the touch screen coordinate final correction value stored in the second storage unit, And a controller for performing coordinate error correction to determine the coordinates of the touch input position.

According to another aspect of the present invention, there is provided a method of controlling a terminal having a touch screen according to the present invention and performing a predetermined function according to a touch input on the touch screen, ; Displaying a coordinate correcting mark on the touch screen according to a user's coordinate correction menu selection; Calculating a touch screen coordinate provisional correction value based on a coordinate value displayed on the coordinate correction mark and a coordinate value generated according to the touch input when there is a touch input on the touch screen; Calculating a touch screen coordinate final correction value by averaging the calculated touch screen coordinate temporary correction value and pre-stored touch screen coordinate basic correction value; If there is a touch input on the touch screen in a state where the touch screen input function is activated, performing error correction on the touch input using the stored final correction value of the touch screen coordinate to determine coordinates of the touch input position .

As described above, according to the present invention, in a terminal equipped with a touch screen, it is possible to more accurately calculate a correction value for correcting the coordinate error of the display unit (display unit) and the input unit (touch panel unit) I can do it.

Further, by setting a predetermined weight for the correction value first calculated after the reset, when the terminal is firstly touch input to the center point of the coordinate calibration mark by a more accurate mechanical device in the process step after the terminal is manufactured, It is possible to calculate a more accurate correction value for coordinate correction than to calculate the correction value depending only on information to be input by touching.

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

1, a mobile communication terminal 100 having a touch screen 150 according to an embodiment of the present invention includes a communication interface unit 110, a first memory 130, a second memory 140, A control unit 120, and a touch screen 150.

The communication interface unit 110 is a general configuration of the mobile communication terminal 100 in which the mobile communication terminal 100 is configured to transmit and receive a radio signal with the base station.

The first memory 130 is a nonvolatile memory in which the basic correction value for the coordinates of the touch screen 150 is preset and stored, and the stored information is not deleted even when the power is turned off.

The second memory 140 stores a final correction value for the coordinates of the touch screen 150. The second memory 140 stores the information stored in the first memory 130 and the information stored in the second memory 140, A more detailed description will be given later.

The touch screen 150 includes a liquid crystal display (LCD) 151 for displaying a predetermined image or image, and a touch panel 152 for sensing a touch input of the user and transmitting the touch input to the control unit 120.

That is, the LCD 151 of the touch screen 150 displays a predetermined image, image, text or the like under the control of the controller 120, the touch panel 152 senses the touch input of the user, The LCD 151 and the touch panel 152 may be combined to form a single touch screen 150 so that the touch screen 150 ) Will have both a display device and an input device.

An example of the structure of the touch panel 152 is shown in Fig.

The touch panel 152 shown in Fig. 2A shows a cross section of the resistive touch panel 152. Fig.

That is, the upper portion 210 and the lower portion 220 of the touch panel 152 are made of thin glass and the glass beads 230 And an upper surface 211 and a lower surface 221 which are in contact with the glass beads 230 and the upper glass 210 and the lower glass 220 are respectively coated with a resistive coating.

In this state, when a region of the upper glass 210 is pressed with a finger or a touch pen, the upper surface 211 and the lower surface 221 of the specific portion between the glass beads 230 come into contact with each other, The output voltage is varied according to the role of the variable resistor and the control unit 120 determines from which position the top surface 211 and the bottom surface 221 are in contact with each other .

FIG. 2B schematically shows an electrical equivalent circuit of the touch panel 152 shown in FIG. 2A. That is, the resistance value varies according to the position where the touch panel 152 touches, and accordingly, the controller 120 calculates the coordinate value that is input to the touch panel 152 by varying the output voltage.

1 includes a comparator for detecting an analog signal corresponding to a touch input of the touch panel 152 and an A / D converter for converting an analog signal into a digital signal. However, the touch panel 152 may include a touch panel 152 are not based on the known technology, so that the description and the illustration will be omitted in this embodiment.

The control unit 120 displays a coordinate correction mark on the touch screen 150 in accordance with the user's selection of the coordinate correction menu. When the touch input is on the touch screen 150, (150) coordinate value based on the coordinate value of the touch input area and the coordinate value of the touch input position, and averages the calculated coordinate correction value of the touch screen (150) and the basic correction value stored in the first storage unit, (150) coordinate final correction value and stores it in the second storage unit.

At this time, the control unit 120 may apply predetermined weight values preset to the basic coordinate correction values of the touch screen 150 stored in the first storage unit in calculating the coordinate final correction values of the touch screen 150. [ That is, instead of averaging the newly calculated coordinate values of the coordinate system of the touch screen 150 and the coordinate values of the previously stored coordinates of the touch screen 150, the coordinate correction value of the newly generated touch screen 150 is multiplied by 0.1, for example. The basic correction value of the previously stored coordinate 150 of the touch screen 150 can be multiplied by 0.9 and added.

Accordingly, it is preferable that the correction value is preset by a precision machine before the terminal is manufactured and the predetermined correction value is supplemented by the coordinate calibration setting by the user, So that more accurate coordinate correction can be performed.

The weights can be changed by the user. The process and the technique for changing the predetermined setting data are well known and will not be described in detail.

If the touch input is on the touch screen 150 in the state where the input function of the touch screen 150 is activated, the control unit 120 uses the final coordinate correction value of the touch screen 150 stored in the second storage unit Performs error correction on the touch input to determine the coordinates of the touch input position, and performs a corresponding predetermined function based on the determined coordinates.

Here, the state where the input function of the touch screen 150 is activated refers not to the coordinate correction menu state of the touch screen 150 but generally a user performs a predetermined function by touching the touch screen 150 And the like. That is, a state in which power is input to the terminal and a function-display function and an input function inherent to the touch screen 150 can be performed.

Hereinafter, a process of controlling the mobile communication terminal 100 having the touch screen 150 according to an embodiment of the present invention will be described in detail with reference to FIGS. 3A and 3B.

In the present embodiment, a process of setting and storing the basic coordinates correction value of the touch screen 150 in the first memory 130 will be described.

First, the controller 120 of the terminal having the touch screen 150 detects a reset command by the user (step S1), and performs a terminal initialization process (step S3). The initialization process means changing the value set by the user or other changed values to the initial terminal release state.

That is, in the present embodiment, the initialization process is not an initialization process performed only when the power is turned off after the terminal is turned off, but the coordinate correction related data, particularly the data stored in the first memory 130, Process.

After performing the reset, the control unit 120 displays a coordinate correction mark on the touch screen 150 (step S7) when it detects the selection of the coordinate correction menu from the user (step S5). Since the control unit 120 controls to display the coordinate correction mark on the touch screen 150, the control unit 120 knows the coordinate value on the touch screen 150 on which the coordinate correction mark is displayed.

When the coordinate inputting mark is displayed on the touch screen 150 and the touch input of the user is sensed (step S9), the control unit 120 compares the coordinate indicated by the coordinate calibration mark with the coordinate corresponding to the touch input of the user And calculates the basic coordinate correction value of the touch screen 150 and stores it in the first memory 130 (step S11).

A coordinate correction mark is displayed on the touch screen 150 and a user can touch input the center of the mark several times. FIG. 4 shows a cross- Shaped coordinate correction marks 155 are sequentially displayed at different positions. That is, each time the cross-shaped coordinate correction mark 155 is displayed sequentially as shown in FIG. 4, the user touches the center point of the cross 155 to finally input the coordinate correction basic value of the touch screen 150 Is calculated.

There are various algorithms for calculating these correction values, one of which will be described as follows.

The conversion equations for extracting the actual coordinate values of the touch input at an arbitrary point are as shown in Equations (1) and (2). Here, it is assumed that the final transformed coordinate value is (X_d, Y_d) and the inputted coordinate value is (X, Y).

X_d = AX + BY + C Equation (1)

Y_d = DX + EY + F (2)

 In such a conversion equation, the conversion is completed when only unknown values A, B, C, D, E, and F are obtained.

Since there are six unknowns, a touch input value is required for at least three points. That is, as described above, the three coordinate calibration marks are sequentially displayed and a touch input process is required for the center point of the coordinate calibration mark.

(X0, Y0), (X1, Y1), (X1, Y1), (X2) (1) and (2) to obtain the unknown values A, B, C, D, E and F, Respectively.

Equation (3)

A = ((X_d0-X_d2) (Y1-Y2) - (X_d1-X_d2) (Y0-

B = ((X0-X2) (X_d1-X_d2) - (X_d0-X_d2)

C = Y0 (X2 * X_d1-X1 * X_d2) + Y1 (X0 * X_d2-X2 * X_d0) + Y2 (X1 * X_d0-

D = ((Y_d0-Y_d2) (Y1-Y2) - (Y_d1-Y_d2)

E = (X0-X2) (Y_d1-Y_d2) - (Y_d0-Y_d2) (X1-X2) / K

F = Y0 (X2 * Y_d1-X1 * Y_d2) + Y1 (X0 * Y_d2-X2 * Y_d0) + Y2 (X1 * Y_d0-X0 * Y_d1)

Here, K = (X0-X2) (Y1-Y2) - (X1-X2) (Y0-Y2).

If the unknowns A, B, C, E, D, and F are obtained as shown in the above equation (3), the coordinate conversion formula is completed.

That is, the correction value stored in the first memory 130 may be a matrix value composed of A, B, C, D, E, and F described above.

Then, when the control unit 120 detects the reselection of the coordinate correction menu from the user (step S13), the coordinate correction mark is displayed (step S15), and the secondary correction value corresponding to the touch input (step S17) is calculated S19). The process of calculating the correction value is the same as that of the algorithm described above.

The secondary correction values may be A ', B', C ', D', E ', and F'.

The controller 120 calculates a final correction value by averaging the secondary correction value and the basic correction value stored in the first memory 130, and stores the final correction value in the second memory 140 (step S21).

At this time, the controller 120 may calculate a final correction value by putting a predetermined weight on the basic correction value.

The calculated final correction value may be a matrix consisting of A ", B ", C ", D ", E ", F "

After the final correction value is calculated, when the touch input unit 150 is activated (step S23), the control unit 120 detects the touch input (step S25) An error correction is performed through a conversion process using the calculated final correction value (step S27). That is, the input coordinate values are calculated by substituting into the equations (1) and (2).

The control unit 120 determines which object exists at the position input by the user based on the calculated input coordinate value, and performs the function of the determined object (step S29).

For example, when the user has a menu button at a position to which the user has touched, the control unit 120 displays the menu item on the touch screen 150.

Accordingly, by further adding a process step for storing the basic correction value before the terminal is assembled and before the terminal is assembled, more precise coordinate error correction can be performed.

That is, a reset command is issued to the terminal and a coordinate calibration menu is selected. Then, the first touch input is performed on the center point of the coordinate calibration mark instead of the user using a more precise machine installed at the factory, If the correction value is set and stored in the first memory 130 and the corresponding product is sold to the consumer, the user can use the terminal with more precisely corrected coordinates through the coordinate correction process.

That is, the coordinate correction process is performed not only by the user's coordinate correction process but also by an average (predetermined weight can be applied) with a predetermined basic correction value, so that more accurate error correction can be performed.

It is needless to say that the basic correction value stored in the first memory 130 may be applied to a case where all the calibration process is performed by the user rather than by the factory facility as described above.

In other words, in the first coordinate correction process after the user issues a reset command after purchasing, the user is more prudent and uses various personal means to accurately input the touch. In the second and subsequent calibration processes, The first correction value is always stored in the first memory 130, so that there is no possibility that the final correction value for error correction largely deviates. Particularly, since a predetermined weight is applied to the basic correction value stored in the first memory 130, the final correction value is calculated.

Although the mobile communication terminal having a touch screen has been described as an example in the above embodiment, it can be included in the present invention regardless of whether the terminal is equipped with a touch screen, portable, fixed, wired or wireless.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. It is to be understood that such variations and modifications are intended to be included in the scope of the appended claims.

1 is a functional block diagram of a mobile communication terminal equipped with a touch screen according to an embodiment of the present invention,

FIGS. 2A and 2B are views showing a simplified structure and an electrical function of the touch panel included in the touch screen of FIG. 1, respectively,

FIGS. 3A and 3B are flowcharts of a control operation of a mobile communication terminal having a touch screen according to an exemplary embodiment of the present invention,

4 is a view illustrating examples of calibration marks displayed on a touch screen of the mobile communication terminal of FIG.

DESCRIPTION OF THE REFERENCE NUMERALS

100: mobile communication terminal 110: communication interface unit

120: control unit 130: first memory

140: second memory 150: touch screen

151: LCD 152: Touch panel

Claims (9)

1. A terminal having a touch screen and performing a predetermined function according to a touch input on the touch screen, A first storage unit in which a basic correction value for the touch screen coordinates is preset and stored; A second storage unit for storing a final correction value for the touch screen coordinates; A coordinate correction mark is displayed on the touch screen in accordance with a user's coordinate correction menu selection, and when there is a touch input on the touch screen on which the coordinate correction mark is displayed, the coordinate value of the position at which the coordinate correction mark is displayed The touch screen coordinate temporary correction value is calculated using coordinate values generated according to the touch input, and the calculated touch screen coordinate temporary correction value and the basic correction value stored in the first storage unit are averaged to obtain a touch screen coordinate final correction value And if the touch input is on the touch screen in a state that the touch screen input function is activated, the touch screen input unit stores the touch screen coordinate final correction value stored in the second storage unit, And a controller for performing error correction to determine the coordinates of the touch input position, Wherein the controller displays a coordinate correction mark on the touch screen when there is a first coordinate correction menu selection after a reset command, and then outputs the coordinate value generated according to the touch input on the touch screen and the coordinate The touch screen coordinate basic correction value is calculated and stored in the first storage unit. If there is a re-selection of the coordinate correction menu, the coordinate correction mark is displayed on the touch screen, Screen coordinate temporary correction value on the basis of the coordinate value generated according to the touch input on the touch screen and the coordinate value indicating the coordinate correction mark and outputs the calculated touch screen coordinate temporary correction value and the calculated basic correction value And the touch screen coordinate final correction value is calculated and stored in the second storage unit A terminal having a touch screen that. delete The method according to claim 1, Wherein the controller applies a preset predetermined weight to the touch screen coordinate basis correction value stored in the first storage unit when calculating the touch screen coordinate final correction value. The method according to claim 1, Wherein the control unit controls the display unit so that at least three coordinate correction marks are displayed on the touch screen when the coordinate correction mark is displayed on the touch screen in accordance with the user's coordinate correction menu selection. A terminal equipped with a screen. 5. The method of claim 4, Wherein the control unit receives a touch input for each of at least three coordinate correction marks sequentially displayed on the touch screen and displays a touch screen coordinate temporary correction value on the basis of coordinates on which the touch input coordinate and the coordinate correction mark are displayed Wherein the terminal has a touch screen. A method of controlling a terminal having a touch screen and performing a predetermined function according to a touch input on the touch screen, (A) setting and storing a base correction value for touch screen coordinates; (B) displaying a coordinate calibration mark on the touch screen according to a user's coordinate correction menu selection; (C) calculating a touch screen coordinate provisional correction value based on a coordinate value indicating the coordinate calibration mark and a coordinate value generated according to the touch input when the touch input is on the touch screen; (D) calculating and storing a touch screen coordinate final correction value by averaging the calculated touch screen coordinate temporary correction value and pre-stored touch screen coordinate basic correction value; (E) if a touch input is made on the touch screen in a state in which the touch screen input function is activated, error correction for the touch input is performed using the stored final touch screen coordinate correction value to determine coordinates of the touch input position , ≪ / RTI > The step (A) Sensing an initial coordinate correction menu selection after a reset command; Displaying a coordinate calibration mark on the touch screen; And calculating and storing a touch screen coordinate basic correction value based on a coordinate value generated according to a touch input on the touch screen and a coordinate value indicating the coordinate correction mark, / RTI > delete The method according to claim 6, In the step (B) Wherein at least three coordinate correction marks are sequentially displayed on the touch screen when a coordinate correction mark is displayed on the touch screen in accordance with a user's coordinate correction menu selection The control method of the terminal. The method according to claim 6, The step (D) Further comprising the step of applying a predetermined weight preset to the touch screen coordinate basis correction value.

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