KR102205454B1 - Touch recognizing method and apparatus - Google Patents

Abstract

In the touch recognition method of the present invention, after the first touch is sensed on the display panel, if the first touch moves along the first drag trajectory by drag, a false candidate region is determined based on the first drag trajectory. Generating; determining whether the second touch is a drag touch when a second touch is sensed within the fall candidate region; and if the second touch is a drag touch moving along a second drag trajectory, the second touch Analyzing the pattern similarity between the 1 drag trajectory and the second drag trajectory, and recognizing the second touch as a false touch when the analyzed pattern similarity is greater than or equal to a preset reference value. .

Description

Touch recognition method and device {TOUCH RECOGNIZING METHOD AND APPARATUS}

The present invention relates to a touch recognition method and device, and more particularly, to a touch recognition method capable of identifying (distinguishing) an unintended input (false touch, false touch) in a display device supporting multi-touch, and the same It relates to the device.

As is well known, a touch screen is one of various methods of configuring an interface between an electronic and information communication device using various display devices and a user, and a user directly touches the panel (screen) using a finger or a pen. ), it is an input means that can interface with the device.

According to a method of recognizing a user's touch, such a touch screen includes a resistive film type, a capacitive type, an ultrasonic type, and an infrared type, of which the infrared type uses a light emitting unit and a light receiving unit.

Recently, a large touch screen board such as a multi-users wide type seamless smart wall, which can be used simultaneously by multiple users, is in the form of a 2x4 array. Large-sized touch screen boards constituting wide viewing have been developed and are used in various technical fields.

In such a large touch screen board of tens to hundreds of inches, a method of supporting multi-touch based on an infrared (IR) LED is mainly used for an intuitive finger touch-based user interface (UI) and independent control of contents.

Here, a large teach screen board supporting a multi-touch function may have a panel structure such as a multi-touch frame, tempered glass, a seamless LCD panel, a well mounting bracket, and a display distributor.

At this time, as the smart wall is implemented in a larger size, the gap between the tempered glass and the multi-touch frame becomes relatively wide due to an alignment problem, thereby causing an unintended input (false touch, false touch) from the user. There is a problem, for example, that a multi-touch input by a sleeve or another hand is caused when one point is touched using the index finger.

Republic of Korea Patent Publication No. 10-2012-0118674 (published on October 29, 2012)

The present invention provides a touch recognition method and an apparatus for recognizing an unintended input (false touch) by a user through analysis of a drag trajectory of a touch in a large touch screen board supporting multi-touch.

The problem to be solved by the present invention is not limited to the ones mentioned above, and another problem to be solved that is not mentioned can be clearly understood by those of ordinary skill in the art from the following descriptions. will be.

According to an aspect of the present invention, after a first touch is sensed on a display panel, if the first touch moves along a first drag trajectory by drag, a false candidate region based on the first drag trajectory Generating and determining whether the second touch is a drag touch when a second touch is detected within the fall candidate region; and if the second touch is a drag touch moving along a second drag trajectory, the Analyzing a pattern similarity between the first drag trajectory and the second drag trajectory, and recognizing the second touch as a false touch when the analyzed pattern similarity is greater than or equal to a preset reference value Can provide a method of recognition.

The pattern similarity of the present invention may be calculated based on at least one of the length and shape of the first drag trajectory and the second drag trajectory, and a distance between the end point of the first drag trajectory and the end point of the second drag trajectory. have.

The fall candidate region of the present invention may be generated after a predetermined time after sensing of the first touch.

The fall candidate region of the present invention may disappear at the same time as the drag of the first touch is released.

The fall candidate region of the present invention may be generated in the form of a concentric circle around the initial detection position of the first touch.

According to another aspect, the present invention can provide a computer program stored in a computer-readable recording medium so that a processor can perform the touch recognition method according to any one of claims 1 to 6.

According to another aspect, the present invention includes a touch sensing unit detecting a first touch from a display panel, a drag detecting unit detecting whether the first touch is dragged, and the first touch is a first drag trajectory by dragging. When moving along, a candidate region generator that generates a false candidate region based on the first drag trajectory, and detects that a second touch within the false candidate region is a drag touch moving along a second drag trajectory In this case, a pattern analysis unit that analyzes the pattern similarity of the first drag trajectory and the second drag trajectory, and when the analyzed pattern similarity is greater than or equal to a preset reference value, recognizes the second touch as a false touch It is possible to provide a touch recognition device including a false touch determination unit.

The pattern analysis unit of the present invention calculates the pattern similarity based on at least one of lengths and shapes of the first and second drag trajectories, and a distance between an end point of the first drag trajectory and an end point of the second drag trajectory. can do.

The candidate region generator according to the present invention may generate the fall candidate region in a concentric circle shape around an initial detection position of the first touch.

According to an embodiment of the present invention, by allowing a user to recognize an unintended input through analysis of a drag trajectory of a touch in a large touch screen board supporting multi-touch, it is possible to prevent a UI error from occurring due to a false touch. Can be effectively prevented.

1 is a block diagram of a touch recognition device according to an embodiment of the present invention.
2A and 2B are conceptual diagrams exemplarily showing distinguishing recognition of a normal touch and a false touch according to an embodiment of the present invention.
3 is a flow chart illustrating a main process of recognizing a false touch according to an embodiment of the present invention.

First, the advantages and features of the present invention, and a method of achieving them will become apparent with reference to embodiments to be described later in detail together with the accompanying drawings. Here, the present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms, only the present embodiments are intended to complete the disclosure of the present invention, and are common in the technical field to which the present invention pertains. Since it is provided by way of example in order to allow a person skilled in the art to clearly understand the scope of the invention, the technical scope of the invention should be defined by the claims.

In addition, in the following description of the present invention, if it is determined that a detailed description of known functions or configurations may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators. Therefore, the definition should be made based on the technical idea described throughout the specification.

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

1 is a block diagram of a touch recognition device according to an embodiment of the present invention.

Referring to FIG. 1, the touch recognition device 110 of the present embodiment includes a touch detection unit 111, a drag detection unit 113, a candidate region generation unit 115, a pattern analysis unit 117, and a false touch determination unit 119. ), etc.

Here, the control unit 120 is a microprocessor that overall controls various functions performed on a large touch screen board (eg, a multi-users wide type seamless smart wall, etc.) It may mean a controller including the like.

First, the touch sensing unit 111 may include, for example, a light-emitting unit and a light-receiving unit mounted at an arbitrary position in the display module, and can be performed through a display panel (or touch screen) not shown. A function of detecting a touch (touch input), multi-touch (multi-touch input), etc. can be provided. Here, the location of a touch input (or multi-touch input) by a user's finger (finger interface) or the like may be expressed as touch coordinates.

In addition, the drag detection unit 113 is based on the touch detection signal transmitted from the touch detection unit 111, whether the touch (or multi-touch) is moved by drag, the drag trajectory (movement path) by the drag, and the drag is released. It can provide a function to detect.

For example, the drag detection unit 113, as an example, as shown in FIG. 2A, when the first touch 202a or the second touch 204a is sensed or when each drag of each touch 202a, 204a is released. The pattern analysis unit detects and transmits the detection to the candidate region generating unit 115, and detects the drag trajectory 202 by the drag of the first touch 202a and the drag trajectory 204 by the drag of the second touch 204a. You can pass it to (117).

In FIG. 2A, unexplained number 202b may denote a drag release position after a drag of the first touch 202a is moved, and 204b may denote a drag release position after a drag of the second touch 204a is moved. .

Further, the candidate region generator 115 initially detects the first touch 202a when it is notified that a touch (eg, a first touch) has been detected from the drag detection unit 113 or when the drag release of the first touch is notified. A function such as generating a false candidate region based on a location (touch coordinates) may be provided. The size of the false candidate region may be determined, for example, based on the size of a user's hand.

As an example, as illustrated in FIGS. 2A and 2B, respectively, the fall candidate region A may be generated in a concentric circle shape around the first touch 202a.

Here, the fall candidate region may be generated after, for example, a predetermined time after sensing of the first touch. In addition, the fall candidate region may disappear at the same time as the drag of the first touch is released, but the time point of disappearance is not limited thereto.

Next, the pattern analysis unit 117 is the first drag trajectory 202 by the drag of the first touch 202a transmitted from the drag detection unit 113 and the second drag trajectory by the drag of the second touch 204a. It is possible to provide a function such as analyzing the degree of similarity between the patterns 204 and transmitting the analysis result to the false touch determination unit 119.

For example, the pattern analysis unit 117 may calculate a pattern similarity based on at least one of the length and shape of the first drag trajectory and the second drag trajectory, and the distance between the end point of the first drag trajectory and the end point of the second drag trajectory. I can.

In addition, the false touch determination unit 119 checks whether the pattern similarity transmitted from the pattern analysis unit 117 is greater than or equal to a preset reference value, and when the pattern similarity is greater than or equal to a preset reference value, the false candidate area A ), a function of recognizing (distinguishing) the second touch 204a sensed by the user as an unintended input (false touch, false touch), etc. may be provided.

As an example, as shown in FIG. 2A, the first drag trajectory 202 by the drag of the first touch 202a and the second touch by the drag of the second touch 204a sensed in the fall candidate area (A) If the pattern similarity between the drag trajectories 204 is greater than or equal to a preset reference value (eg, pattern similarity of 90% or more), the false touch determination unit 119 will recognize the second touch 204a as a false touch.

As another example, as shown in FIG. 2B, the first drag trajectory 202 by the drag of the first touch 202a and the second touch 206a detected by the fall candidate area A are If the pattern similarity between the 2 drag trajectories 206 is less than or equal to a preset reference value (eg, pattern similarity of 90% or more), the false touch determination unit 119 will recognize the second touch 206a as a normal touch.

Next, a series of processes for recognizing a false touch based on a drag trajectory analysis of a touch using the touch recognition device of the present embodiment having the above-described configuration will be described in detail.

3 is a flow chart illustrating a main process of recognizing a false touch according to an embodiment of the present invention.

Referring to FIG. 3, when the touch sensing unit 111 detects a first touch (eg, 202a in FIG. 2A) performed by a user through a display panel (or touch screen), which is not shown, the drag detection unit 113 The drag detection unit 113 monitors whether the first touch 202a is dragged (step 302).

Thereafter, the drag detection unit 113 checks whether the drag of the first touch 202a moving along the drag trajectory is released (step 304). As a result of the check here, the drag release of the first touch 202a When is detected, the drag detection unit 113 may notify this to the candidate area generator 115, or when a drag of the first touch 202a is detected, it may be notified to the candidate area generator 115.

In response to this, the candidate region generating unit 115 generates the fall candidate region A in the form of a concentric circle, for example, based on the initial detection position (touch coordinates) of the first touch 202a (step 306). Here, the size of the fall candidate area A may be determined based on, for example, the size of the user's hand, and may be generated in a concentric circle shape around the first touch 202a, for example.

Here, the fall candidate region may be generated after a predetermined time after detection of the first touch, for example, and the generated fall candidate region may disappear at the same time as the drag of the first touch is released, but is not limited thereto. .

Next, when the detection of the second touch (e.g., 204a in FIG. 2A) is notified from the touch detection unit 111, the drag detection unit 113 determines whether the second touch is a touch drag detected in the false candidate area A. Is checked (step 308), and as a result of the check, when it is determined that the second touch is a touch drag, the drag detection unit 113 performs the first drag trajectory 202 and the second touch 204a of the first touch 202a. The second drag trajectory 204 of) is transmitted to the pattern analysis unit 117.

In addition, the pattern analysis unit 117 analyzes the pattern similarity between the first drag trajectory 202 of the first touch 202a and the second drag trajectory 204 of the second touch 204a to determine the false touch determination unit 119 ) To (step 310), wherein the pattern similarity is based on at least one of, for example, the length and shape of the first and second drag trajectories, and the distance between the end points of the first drag trajectory and the end points of the second drag trajectory. Can be calculated.

Thereafter, the false touch determination unit 119 checks whether the pattern similarity transmitted from the pattern analysis unit 117 is greater than or equal to a preset reference value (step 312). If it is abnormal, the false touch determination unit 119 recognizes (discriminates) the second touch 204a detected in the false candidate area A as an input (false touch, false touch) not intended by the user (step 314).

Here, recognizing the second touch 204a as a false touch may mean that an input that is not intended by the user is not regarded as a normal touch input and is discarded.

Meanwhile, combinations of each block of the attached block diagram and each step of the flowchart may be performed by computer program instructions. Since these computer program instructions can be mounted on a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment, the instructions executed by the processor of the computer or other programmable data processing equipment are shown in each block or flow chart of the block diagram. Each step creates a means to perform the functions described.

These computer program instructions can also be stored in a computer-usable or computer-readable memory, etc., which can be directed to a computer or other programmable data processing equipment to implement a function in a specific manner, so that the computer-usable or computer-readable memory It is also possible to produce an article of manufacture in which the instructions stored in the block diagram contain instruction means for performing the functions described in each block or flow chart.

In addition, since computer program instructions can be mounted on a computer or other programmable data processing equipment, a series of operation steps are performed on a computer or other programmable data processing equipment to create a process that is executed by a computer, It is also possible for the instructions to perform possible data processing equipment to provide steps for executing the functions described in each block of the block diagram and each step of the flowchart.

In addition, each block or each step may represent a module, segment, or part of code including at least one or more executable instructions for executing the specified logical function(s). It should also be noted that in some alternative embodiments, functions mentioned in blocks or steps may occur out of order. For example, two blocks or steps shown in succession may in fact be performed substantially simultaneously, or the blocks or steps may sometimes be performed in the reverse order depending on the corresponding function.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains, various substitutions, modifications, and changes, etc., within the scope not departing from the essential characteristics of the present invention. It will be easy to see that this is possible. That is, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by these embodiments.

Accordingly, the scope of protection of the present invention should be interpreted by the claims to be described later, and all technical thoughts within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

According to an embodiment of the present invention, an input that is not intended by a user may be recognized through analysis of a drag trajectory of a touch in a large touch screen board supporting multi-touch. According to such an embodiment of the present invention, a large touch screen board constituting wide viewing can be widely used in various technical fields to which it is applicable.

111: touch detection unit 113: drag detection unit
115: candidate region generation unit 117: pattern analysis unit
119: Falls touch discrimination unit

Claims (9)

After the first touch is sensed on the display panel, if the first touch moves along the first drag trajectory by drag, generating a false candidate region based on the first drag trajectory,
Determining whether the second touch is a drag touch when a second touch is detected within the fall candidate area; and
If the second touch is a drag touch moving along a second drag trajectory, analyzing a pattern similarity between the first drag trajectory and the second drag trajectory,
Recognizing the second touch as a false touch when the analyzed pattern similarity is greater than or equal to a preset reference value,
The pattern similarity is calculated based on at least one of a length and shape of the first drag trajectory and the second drag trajectory. delete The method of claim 1,
The fall candidate region,
Generated after a predetermined time after detection of the first touch
Touch recognition method. The method of claim 3,
The fall candidate region,
Dissipated at the same time the drag of the first touch is released
Touch recognition method. The method of claim 1,
The fall candidate region,
Generated in the form of a concentric circle around the initial detection position of the first touch
Touch recognition method. A computer program stored in a computer-readable recording medium so that the processor can perform the touch recognition method according to any one of claims 1, 3, 4 and 5. A touch sensing unit for sensing a first touch from the display panel,
A drag detection unit that detects whether the first touch is dragged;
A candidate region generator configured to generate a false candidate region based on the first drag trace when the first touch moves along a first drag trace by dragging;
A pattern analysis unit configured to analyze a pattern similarity between the first drag trajectory and the second drag trajectory when a second touch is detected as a drag touch moving along a second drag trajectory within the fall candidate area;
When the analyzed pattern similarity is greater than or equal to a preset reference value, the second touch includes a false touch determination unit that recognizes the second touch as a false touch
The pattern analysis unit,
A touch recognition device that calculates the pattern similarity based on at least one of a length and shape of the first drag trajectory and the second drag trajectory. delete The method of claim 7,
The candidate region generator,
Generating the fall candidate region in the shape of a concentric circle around the initial detection position of the first touch
Touch recognition device.

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