KR101171623B1 - Control method and tools for touch panel on multi touch basis, and mobile devices using the same - Google Patents

Abstract

Provided are a multi-touch based touch panel controller, a method, and a mobile device using the same.

According to an aspect of the present invention, a touch panel controller includes: a multi-touch detector configured to detect n touch points by a user input means; When the number of touch points is reduced to n-1 or less of the n touch points detected by the multi-touch detector, a variable point is generated at the reduced corresponding touch point, and then the variable point is touched by the user input means. A control unit for moving corresponding to the point movement; And a command unit for performing a control command for an object of a touch panel according to the movement of the variable point and the touch point of the user input means. It is possible to effectively perform an object control command such as a zoom command. That is, the touch panel may be effectively controlled by generating a variable point which is a virtual touch point at a point where the touch is terminated among the multi-touches, and controlling and moving the variable point according to the user touch. Furthermore, the limitation of physical multi-touch in a relatively small touch panel, that is, the limitation that two fingers cannot escape the boundary area of the panel, can be effectively overcome by using a variable point, which is a virtual touch point. This enables more user-friendly touch panel control in areas that require screen magnification, such as zoom commands on mobile devices. In addition, in the present invention, since a plurality of variable touch points can be generated and controlled simultaneously by a user touch gesture, a plurality of objects can also be effectively manipulated and controlled. Furthermore, by employing the existing multi-touch interaction method, it has the advantage that the user can easily use it without any learning, and can eliminate occlusion due to the finger.

Description

Control method and tools for touch panel on multi touch basis, and mobile devices using the same}

The present invention relates to a multi-touch panel input device, a method and a mobile device using the same. More specifically, the present invention relates to a multi-touch panel input device, a method for operating multiple touch points with one interactive touch point, and a mobile device using the same.

Touch screen or touch panel means that when an input means such as a person's hand or an object touches (touches) a character displayed on a screen (screen) or a specific position without using a keyboard, the touch position is detected and stored using software. Refers to a user interface device capable of processing. Examples of the touch panel include a touch panel of a resistive overlay, a surface acoustic wave, a capacitive overlay, and an infrared beam. The pressure touch panel is coated with a resistive material on a transparent plastic plate to recognize the position as a change in resistance upon contact. Surface ultrasonic touch panel recognizes the touch point by the presence of interference of sound waves. The capacitive touch panel recognizes touch points by analyzing high frequency waveforms. An infrared touch panel recognizes touch points by placing infrared light emitting elements and light receiving elements facing up, down, left and right of the touch panel. Since the touch panel can be implemented in a small size, the touch panel employs a large number of materials.

Recently, in order to enable more complex and various interfaces, a multi-touch input method for extracting several touch points has emerged. However, the multi-touch input method overlooks the fact that the operation of a mobile device is often performed by one hand, and has the inconvenience of using two hands or two or more fingers. In addition, even in the case of a multi-touch tabletop interface using a large touch panel, there was a limit in handling an object (object) of a certain size or more. Therefore, there is a need for a new touch panel input method and apparatus that can easily perform complicated operations with one hand. In addition, in a situation in which a large number of objects are represented in a miniaturized touch panel (for example, a keyboard, etc.), many touch errors occur when a user inputs a touch panel. Therefore, even in such a situation, there is a need for a technology of simply zooming in on a touch panel display with only one hand. Against this background, a touch screen control method, a touch screen device, and a portable small electronic device (Patent Application No. 1020090029214) have been disclosed, but the user can not set the virtual operation point and the operation direction, causing inconvenience. Furthermore, when a large number of objects are displayed on the touch panel at the same time, it is uneconomical to control all of them sequentially, since it takes considerable time.

Therefore, the present invention has been proposed in view of the above-described problems of the prior art, and a problem to be solved by the present invention is a new concept of touch that can be operated in a simpler and more efficient manner even in an area not touched by a user's physical input means. To provide a panel control device.

Another problem to be solved by the present invention is a new concept that the user can effectively set the virtual operation point and direction, even in a region that is not touched by the user's physical input means can be performed in a simpler and more efficient manner It is to provide a touch panel control method.

Another object of the present invention is to provide a mobile device having a relatively narrow touch panel and employing a touch panel control method using one hand or one finger.

In order to solve the above problems, the present invention provides a multi-touch detection unit for detecting n touch points by the user input means; When the number of touch points is reduced to n-1 or less of the n touch points detected by the multi-touch detector, a variable point is generated at the reduced corresponding touch point, and then the variable point is touched by the user input means. A control unit for moving corresponding to the point movement; And a command unit configured to perform a control command for an object of the touch panel according to the movement of the touch point of the variable point and the user input means, wherein n is an integer of 2 or more. to be. The controller determines that the number of touch points is reduced when the user touch is terminated for more than a predetermined time on the touch panel, and generates a variable point at the point at which the touch is terminated. The controller also controls n touches by the user input means. The variable point is moved around the center point having the same distance as the point so as to have the same movement distance and angle change as the movement distance and angle change of the user touch point. The variable point movement is performed when an angle between n user touch point movement directions is greater than or equal to a predetermined angle before the variable point is generated, and a zoom command is performed according to a change in distance between the center point and the variable point. The rotation command of the object may be performed according to the rotation angle of the variable point based on.

The zoom-in command is performed when the distance between the center point and the variable point becomes long, and the zoom-out command is performed when the distance between the center point and the variable point becomes short, wherein the zoom command ratio is the distance. Proportional to

In another embodiment of the present invention, the variable point movement has the same direction and movement distance as the movement of the user touch point, and the variable point movement is a movement direction of n user touch points before the variable point is generated. It is performed when the angle between is less than a predetermined angle.

In order to solve the above problems, another embodiment of the present invention includes a touch detection unit for detecting a multi-touch by the user input means; A controller configured to set a point at which the touch state ends as a center point when one of the multi-touch states ends; A calculator configured to calculate a distance and a rotation angle between the user touch points detected by the touch detector based on the center point; And a command unit configured to perform a touch screen control command according to the distance and rotation angle calculated by the operation unit. When the center point is set, the controller generates a variable point moving in point symmetry with the user touch point around the center point, and a mark recognizable by the user may be generated at the variable point. The command unit may further perform a first command according to a change in distance between the center point and the user touch point and a second command according to a rotation angle of the user touch point based on the center point. One of the first command and the second command may be a zoom command of an object based on the center point. In addition, the second command may be any one of the following.

-Switch to previous or next object

-Play the previous or next video medium

-Rewind or fast forward the video medium

-Increase or decrease display or voice information

-Adjust brightness or brightness of specific objects

Scroll up or down the list of data

The present invention provides a mobile device including the above-described touch panel control device for solving the another problem.

In order to solve the another object, the present invention comprises the steps of first detecting n multi-touch on the touch panel by the user touch; Detecting n-1 touch points or less of the n multi-touch touches whose touch states are terminated; Generating a variable point at the touch point at which the touch state is terminated; And moving the variable point in response to the movement of the user touch point, and performing a command to control an object on the touch panel according to the user touch and the variable point movement. N is an integer of 2 or more.

The variable point generation is generated when a user touch is released for a predetermined time or more on the touch panel, and the variable point is centered on a center point having the same distance as the first detected n touch points before the variable point is generated. You can move to have the same distance and angle change as the point.

In addition, the variable point movement may be performed when an angle between n user touch point movement directions is greater than or equal to a predetermined angle before the variable point is generated, and a zoom command is performed according to a change in distance between the center point and the variable point. The rotation command of the object may be performed according to the rotation angle of the variable point with respect to the center point.

In one embodiment of the present invention, if the distance between the center point and the variable point becomes longer, a zoom-in command is performed. When the distance between the center point and the variable point becomes shorter, a zoom-out command is performed. The command rate is proportional to the distance. In addition, the variable point movement has the same direction and movement distance as the movement of the user touch point, and the variable point movement has an angle between the movement directions of n user touch points less than a predetermined angle before the variable point is generated. If it is done.

Another embodiment of the present invention for solving the above problems is a first step of detecting a multi-touch; Detecting a second touch point of the multi-touch in which the touch state is terminated; Calculating a distance and an angle of a user touch point using the touch point at which the touch state is terminated as a center point; And performing a first command based on a distance between the center point and the user touch point, and a second command based on a rotation angle of the user touch point based on the center point. do. When the center point is set, the controller may generate a variable point moving in point symmetry with the user touch point around the center point, and a mark recognizable by the user may be generated at the variable point. In addition, one of the first command and the second command may be a zoom command of the object based on the center point. The second detecting step is further performed when the touch point of any one of the multi-touch ends for more than a predetermined time.

The touch panel control method and apparatus of the present invention having the above configuration and action can effectively perform an object control command such as a zoom command even in a one-hand situation. That is, the touch panel may be effectively controlled by generating a variable point which is a virtual touch point at a point where the touch is terminated among the multi-touches, and controlling and moving the variable point according to a user touch. Furthermore, the limitation of physical multi-touch in a relatively small touch panel, that is, the limitation that two fingers cannot escape the boundary area of the panel, can be effectively overcome by using a variable point, which is a virtual touch point. This enables more user-friendly touch panel control in areas that require screen magnification, such as zoom commands on mobile devices. In addition, in the present invention, since a plurality of variable touch points can be generated and controlled simultaneously by a user touch gesture, a plurality of objects can also be effectively manipulated and controlled. Furthermore, by employing the existing multi-touch interaction method, it has the advantage that the user can easily use it without any learning, and can eliminate occlusion due to the finger.

In order to solve the above problems, the present invention uses a virtual touch point, that is, variable point (s) generated at the same point after the touch is terminated at the touch point of the user input means such as a finger in the touch panel as described above. By performing a control command of the touch panel such as zooming in, zooming out, and moving the screen.

That is, the present invention provides a new concept of touch panel control method and apparatus based on the current mobile interface environment in which multi-touch has become more popular. Thereafter, after detecting a touch point at which the touch is terminated among the plurality of user touches, a variable point that is a virtual touch point is generated at the position. In this case, the second detected touch point should be at least one, but should be less than the number of first detected user touch points. For example, when the user touches the touch panel using all five fingers, the first detected touch point is five. Subsequently, when one of the five fingers is dropped from a predetermined point of the touch panel (release), a point at which one of the fingers is dropped is second detected, and a variable point which is a virtual touch point is generated at the point. Since the variable point can be extended to an area outside the size area of the touch panel, there is an advantage in that the available size of the touch panel can be extended. In addition, as a moving method of the variable point, two methods are possible, which will be described in detail below.

The present invention provides a touch panel control apparatus for implementing the above-described method, which will be described in more detail with reference to the accompanying drawings.

1 is a block diagram of a touch panel control apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the touch panel controller includes a multi-touch detector 110 that detects n multi-touches, ie, multi-touches of two or more points, by a user's touch input means such as a finger or a stylus pen. The multi-touch detection unit may be any type used in the art according to the type and characteristics of the touch panel. When the touch point is reduced to n-1 or less of the n touch points detected by the multi-touch detector, the controller generates a variable point at the reduced corresponding touch point, and then converts the variable point into the user. And a controller 120 for moving corresponding to the touch point of the input means.

The touch panel controller according to an embodiment of the present invention generates a variable point corresponding to a virtual touch point at a touch point at which a touch state ends at a plurality of touch points by a user's input means. Accordingly, the controller 120 may reduce the number of touch points to one or more and n-1 or less when some of the initial touch points are reduced, for example, when n multiple touch points are detected before generating the variable point. If it is reduced, it will generate a variable point.

For example, when five touch points by five fingers are initially detected, when a touch panel touch by four fingers is released, a variable point which is a virtual touch point is generated at the released touch panel point. As a result, the user may perform a multi-touch function in which two or more input means are to be used as at least one input means without necessarily using a plurality of physical touch input means. Therefore, the variable point according to the present invention shows a movement method corresponding to the minimum input means, which maintains the touch state in the touch panel, and controls the object of the touch panel by the movement of the actual input means and the variable point. For example, the zoom and rotation commands are performed, and for this purpose, the touch panel controller includes a command unit 130 for performing the same.

Each of the components of the touch panel input device according to the present invention, that is, the multi-touch detector 110, the controller 120, the command unit 130, and the like may be implemented with one or more hardware. digital signal processor or central processing unit (CPU). That is, each component of the touch panel control apparatus according to the present invention may not be physically distinguished components but logically distinct components, that is, various functions performed in one or more pieces of hardware.

In particular, the touch panel controller according to the present invention has a single touch mode by one input means, a multi touch mode by a plurality of actual input means, and a single actual input means, but the actual command is a multi-touch mode. A virtual multi-touch mode is generated, and the virtual multi-touch mode is activated when the number of touch points of the multi-touch is reduced. In particular, the present invention gives a time delay of a predetermined time between the multi-touch mode and the entry of the virtual multi-touch mode, in particular, when a user releases a touch release due to a mistake or a device shake and a touch release according to an intention of an actual user. To distinguish between them.

Hereinafter, the moving method of the variable point will be described in detail.

2A to 2D are diagrams illustrating a variable point movement method according to an embodiment of the present invention.

Referring to FIG. 2A, three touch points 210a, 210b, and 210c are detected on the touch panel 200. The touch point refers to a touch point generated and generated from a physical touch on a touch panel of an actual user input means, for example, a finger, a stylus pen, or the like. In this case, the touch panel controller according to the present invention sets the center point 220 at a point having the same distance d from the detected plurality of touch points 210a, 210b, and 210c. In particular, the center point serves as a reference point for setting the moving distance and the angle of the touch point, and also serves as the center of the object control command such as a zoom command and a rotation command.

Referring to FIG. 2B, the user moves (dragging) the three touch points in a desired direction, respectively. Thus, the three touch points detected have new coordinate values 210a ', 210b', and 210c ', and the center point is also moved to the new coordinate value 220'. The present invention detects and compares an angle with respect to a moving direction of the plurality of touch points. That is, the present inventors divide the case in which the user moves the multi-touch points in parallel with the case in which the user moves the points symmetrically with respect to the center point, and compares the angles in the dragging directions of the respective multi-touch points, If the angle is greater than the predetermined angle, the multi-point is determined to move in a point symmetrical manner. In addition, the angle measurement may be repeatedly measured according to a predetermined time.

Referring to FIG. 2B, the angle between the first touch point movement direction from 210a to 210a 'and the second touch point movement direction from 210c to 210c' determines the movement pattern of the variable point. That is, in FIG. 2B, when the angle between the first touch point movement direction and the second touch point movement direction is greater than or equal to a predetermined angle, the variable point generated thereafter is symmetrically moved with respect to the center point.

Referring to FIG. 2C, the physical touch state is terminated at two touch points 210a 'and 210b' among the three touch points. That is, after the user drags to 210a 'and 210b', the user moves the user input means away from the touch panel (release). Thus, the touch state of the two touch points among the three detected touch points is terminated, thereby reducing the number of touch points from three to one. Accordingly, the touch panel control apparatus according to the present invention generates a variable point at the points 210a 'and 210b' where the touch state is terminated, and the user actually touches only one touch point 210c '. do.

Referring to FIG. 2D, the user performs dragging from the actual touch point 210c ', wherein the variable point is moved to have the same distance (distance to the center point) and rotation angle as the movement of the actual touch point. As a result, the user may adjust and control a plurality of touch points as a whole by adjusting and controlling one touch input means, thereby performing commands such as zooming and rotating the touch panel object. However, another embodiment of the present invention may use the moving distance ratio of the three touch points (ie, 210a → 210a; 210b → 210b ', 210c → 210c') for the variable point movement. That is, according to an embodiment of the present invention, the moving distance of the variable point may be determined based on the moving length ratio of the actual multi-touch. For example, when the distance ratio of the multi-touch is 1: 2: 3, the variable point moving distance corresponding to the moving distance of the actual touch point may be determined according to the distance ratio.

Furthermore, unlike the prior art in which the zoom command center of an object is fixed, in the present invention, the center point 220 'becomes the object center in which a command such as zooming or rotating is performed. For example, after setting the multi-touch around the area to be zoomed, and then releasing one or more touches of the multi-touch, a variable point is created around the area. Thereafter, the user may perform zooming and rotation of the area by dragging the input means maintaining the touch state. At this time, the zoom command is performed according to the change of the distance between the center point and the variable point. If the distance is long, the zoom-in command is performed. On the contrary, if the distance is short, the zoom-out command is performed. At this time, the zoom-in, zoom-out ratio is proportional to the distance. In addition, the rotation command of the object is performed according to the rotation angle of the variable point with respect to the center point. For example, the object rotates in response to a rotation angle between the first generation point (first point) of the variable point and the second point after being moved, wherein the center of the rotating object becomes the center point 220 '. The above is as described above.

Another embodiment of the present invention provides a variable point movement method different from the above-described method.

3A to 3D are views illustrating a touch panel control method according to another embodiment of the present invention.

Referring to FIG. 3A, three touch points 310a, 310b, and 310c are detected in the same format as that of FIG. 2A, and a center point 320 having the same distance as the three touch points is set.

Referring to FIG. 3B, the three touch points are later moved to new touch points 310a ', 310b', and 310c 'according to a user's dragging gesture, and the like. The difference is within a certain angle.

Referring to FIG. 3C, a touch state is terminated at two touch points among the three, and as a result, a variable point corresponding to a so-called virtual touch point is generated at the touch points 310a '310b' where the touch state is terminated. .

Referring to FIG. 3D, the variable points 310a 'and 310b' move in the same direction as the user touch point 310c 'which is still in a touch state moves. That is, the configuration does not point-symmetrically move the variable point with respect to the actual user touch point based on the center point when the variable point is generated, but moves the variable point in the same direction as the movement of the existing multi-touch point. Therefore, when the user touches two points using the thumb and index finger, drags them substantially in parallel, and then releases or untouches either the thumb or the index finger again and the variable point corresponding to the released thumb or index finger. Is generated, and then the variable point is moved and moved substantially in parallel with the movement of the actual touch point. In particular, the movement length in addition to the movement direction may be the same as the movement length of the actual touch point, or may be determined according to the previous multi-touch movement length ratio.

In addition to the above configuration of the present invention, there is provided a touch panel control device and a control method of another method of fixing the center point.

4 is a block diagram illustrating a touch panel control device according to an embodiment of the present invention.

Referring to FIG. 4, the touch panel controller according to the present invention includes a touch detector 410 for detecting a multi-touch by a user input means; A controller 420 for setting a point where the touch state ends as a center point when one of the multi-touch states ends; A calculator 430 for calculating a distance and rotation angle between the user touch points detected by the touch detector based on the center point; And a command unit 440 for performing a touch panel control command according to the distance and rotation angle calculated by the operation unit. That is, the touch panel control device according to the present invention when the touch state of any one of the plurality of touch points is terminated, and fixes the touch point is terminated as a center point for performing a zoom command, a rotation command, The first and second commands are respectively performed according to the distance and rotation angle of the touch point calculated from the center point. One of the first command and the second command may be a zoom command or a rotation command of the object based on the center point. Furthermore, any one of the following commands may also be performed as the second command based on the rotation angle change. (Playing the previous or next video media, rewinding or fast forwarding the video media, increasing or decreasing the display or audio information, adjusting the brightness or brightness of a specific object, scrolling up or down the data list)

Hereinafter, the touch panel control method according to the present invention will be described in detail with reference to the accompanying drawings.

5A to 5D are views illustrating a touch panel control method according to an embodiment of the present invention.

Referring to FIG. 5A, two touch points 510a and 510b are detected on the touch panel.

Referring to FIG. 5B, when the user moves one touch point 510a of the two touch points 510a and 510b to another one point 510b, the center point of the object control command according to the movement is also moved. do. This is the same as the conventional multi-touch method. In this method, the center point of the object control command, that is, the center of the target object is necessarily located in the middle of the actual touch points, and the center point moves according to the movement of the actual touch point. There is. In this case, in particular, when an object to be zoomed in is on the boundary of the touch panel, since the actual movement of the user input means is limited to the physical size of the touch panel, there is a problem that the object cannot be enlarged to a desired level. That is, when the user wants to enlarge the edge of the screen, the user multi-touches the edge by using the thumb and index finger and opens it. However, since the center point of the object zoom-in is located between the touch points of the thumb and the index finger, the center point may be set in an area other than the desired area according to the dragging of the thumb and the index finger.

However, the present invention effectively solves this problem of moving the center point, which will be described in detail with reference to the drawings below.

Referring to FIG. 5C, the user places any one of the multi-touches in the center 510b of the area where the object control command is to be performed, and then separates them from the touch panel. At this time, the point 510b is fixed as a center point for performing an object control command, for example, a zoom command, a rotation command, and the like. At this time, an embodiment of the present invention may set a predetermined time delay between the touch end step and the center point fixing step in order to distinguish the user's intended touch end from the instant touch end due to a mistake, but the present invention is limited thereto. It doesn't work.

Referring to FIG. 5D, a rotation angle or distance may be calculated according to the movement 510c of the user touch point based on the center point 510b.

In particular, the method effectively overcomes the problem of performing object control in the conventional multi-touch method, that is, the center point is located at the center of the multi-touch point at which the conventional multi-touch method is detected. Can be. The present invention may create a mark that can be identified by the user at the fixed center point 510b and move the mark in a point symmetrical manner from the fixed center point 510b to help the user's intuition. As a result, the user may feel an effect such as performing an object zoom-in with two fingers.

6 is a flowchart illustrating a touch panel control method according to an embodiment of the present invention.

Referring to FIG. 6, first, a touch point by a user touch on the touch panel, that is, n touch points, is first detected (S110). Since the detected touch point is a touch point detected by the multi-touch, n is two or more. Thereafter, a second step (S210) of detecting n-1 or less touch points at which the touch state is terminated among the n multi-touches is performed. That is, in step S210, a case where the number of touch points that are finished is smaller than the total number of touch points is detected. Subsequently, at the point at which the touch state is terminated, that is, the touch released point, a variable point which is a virtual touch position is generated (S310), and the variable point moves in a manner corresponding to a movement pattern of an actual user touch point as described above. Done. Thereafter, the object on the touch panel is controlled according to the movement distance and the rotation angle of the user touch point and the variable point (S410). The movement method of the variable point, the object control command method, and the like are as described above, and thus will be omitted below.

7 is a flowchart illustrating a touch panel control method according to another embodiment of the present invention.

Referring to FIG. 7, two multi-touches on the touch panel are detected (S120), and one touch point where touch is terminated is detected (S220). For example, when only the thumb is touch-ended during multi-touch tasking by the thumb and the index finger, the point at which the thumb is touched is detected in step S220. Thereafter, the distance and angle with respect to the user's touch point are measured and calculated based on the touch terminated point (S320). The distance-based first command and the angle-based second command are performed (S420). Since the first command, the second command, and the like are as described above, they are omitted below.

1 is a block diagram of a touch panel control apparatus according to an embodiment of the present invention.

2A to 2D are diagrams illustrating a variable point movement method according to an embodiment of the present invention.

3A to 3D are views illustrating a touch panel control method according to another embodiment of the present invention.

4 is a block diagram illustrating a touch panel control device according to an embodiment of the present invention.

5A to 5D are views illustrating a touch panel control method according to an embodiment of the present invention.

6 is a flowchart illustrating a touch panel control method according to an embodiment of the present invention.

7 is a flowchart illustrating a touch panel control method according to another embodiment of the present invention.

Claims (28)

In the touch panel input device, A multi-touch detector for detecting n (n is an integer of 2 or more) touch points by the user input means; When the number of touch points is reduced to n-1 or less of the n touch points detected by the multi-touch detector, a variable point is generated at the reduced corresponding touch point, and then the variable point is touched by the user input means. A control unit for moving corresponding to the point movement; And And a command unit configured to perform a control command for an object of the touch panel according to the movement of the variable point and the touch point of the user input means. The method of claim 1, The controller determines that the number of touch points is reduced when the user's touch is terminated for more than a predetermined time on the touch panel, and generates a variable point at the point where the touch ends. The method of claim 1, The control unit moves the variable point around the center point having the same distance as the n touch points by the user input means to have the same movement distance and angle change as the movement distance and angle change of the user touch point. Multi-touch based touch panel controller. The method of claim 3, The variable point movement is performed when the angle between n user touch point movement directions is greater than or equal to a predetermined angle before the variable point is generated. The method of claim 3, A zoom command is performed according to a change in distance between the center point and the variable point, and the rotation command of the object is performed according to the rotation angle of the variable point with respect to the center point. . 6. The method of claim 5, A zoom-in command is performed when the distance between the center point and the variable point becomes longer, and a zoom-out command is performed when the distance between the center point and the variable point becomes shorter, wherein the zoom command ratio is proportional to the distance. Multi-touch based touch panel control device, characterized in that. The method of claim 1, The variable point movement device of claim 1, wherein the variable point movement has the same direction and movement distance as the movement of the user touch point. 8. The method of claim 7, The variable point movement is a multi-touch based touch panel control device, characterized in that is performed when the angle between the moving direction of the n user touch point is less than a predetermined angle before the variable point is generated. In the touch panel controller, A touch detector detecting a multi-touch by the user input means; A controller configured to set a point at which the touch state ends as a center point when one of the multi-touch states ends; A calculator configured to calculate a distance and a rotation angle between the user touch points detected by the touch detector based on the center point; And And a command unit configured to perform a touch screen control command according to the distance and rotation angle calculated by the operation unit. 10. The method of claim 9, When the center point is set, the controller generates a variable point moving in point symmetry with the user touch point around the center point. The method of claim 10, Multi-touch based touch panel control device, characterized in that for the variable point is a user identifiable mark is generated. The method of claim 11, wherein the command unit And a second command according to a change in distance between the center point and the user touch point, and a second command according to a rotation angle of the user touch point based on the center point. 13. The method of claim 12, One of the first command and the second command is a multi-touch based touch panel control device, characterized in that the zoom command of the object with respect to the center point. 13. The method of claim 12, And the second command is any one of the following. -Switch to previous or next object -Play the previous or next video medium -Rewind or fast forward the video medium -Increase or decrease display or voice information -Adjust brightness or brightness of specific objects Scroll up or down the list of data A mobile device comprising a multi-touch based touch panel control device according to any one of claims 1 to 14. First detecting n (n is an integer of 2 or more) multi-touches on the touch panel by a user touch; Detecting n-1 touch points or less of the n multi-touch touches whose touch states are terminated; Generating a variable point at the touch point at which the touch state is terminated; And And moving the variable point in response to the movement of the user touch point, and performing a command for controlling an object on the touch panel according to the user touch and the variable point movement. . 17. The method of claim 16, The variable point generation method of claim 1, wherein the variable point generation is generated when a user touch is released for a predetermined time or more on the touch panel. 17. The method of claim 16, The variable point is a multi-touch-based touch panel control method for moving the variable point with the same distance and angle change as the user touch point, the center point having the same distance as the first detected n touch point before the variable point is generated. 19. The method of claim 18, The variable point movement method is performed when the angle between n user touch point movement directions is greater than or equal to a predetermined angle before the variable point is generated. The method of claim 19, A zoom command is performed according to a change in distance between the center point and the variable point, and a rotation command of the object is performed according to the rotation angle of the variable point based on the center point. . The method of claim 20, A zoom-in command is performed when the distance between the center point and the variable point becomes long, and a zoom-out command is performed when the distance between the center point and the variable point becomes short, wherein the zoom command ratio is proportional to the distance. Multi-touch based touch panel control method, characterized in that. 19. The method of claim 18, The variable point movement method according to claim 1, wherein the variable point movement has the same direction and movement distance as the movement of the user touch point. 23. The method of claim 22, The variable point movement is performed when the angle between the moving directions of n user touch points is less than a predetermined angle before the variable point is generated. First detecting a multi-touch; Detecting a second touch point of the multi-touch in which the touch state is terminated; Calculating a distance and an angle of a user touch point using the touch point at which the touch state is terminated as a center point; And And performing a first command based on a distance between the center point and a user touch point, and a second command based on a rotation angle of the user touch point based on the center point. . The method of claim 24, wherein calculating the distance and angle of the user touch point comprises And when the center point is set, generating a variable point moving in point symmetry with the user touch point about the center point. 26. The method of claim 25, The variable point is a multi-touch-based touch panel control method, characterized in that the user can recognize the cover is generated. The method of claim 24, One of the first command and the second command is a zoom command of an object based on the center point. The method of claim 24, The second detecting step is performed when the touch point of any one of the multi-touch ends for more than a predetermined time.

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