WO2014131283A1

WO2014131283A1 - Touch recognition method and device

Info

Publication number: WO2014131283A1
Application number: PCT/CN2013/084677
Authority: WO
Inventors: 王利飞
Original assignee: 华为终端有限公司
Priority date: 2013-02-26
Filing date: 2013-09-30
Publication date: 2014-09-04
Also published as: CN103105975B; CN103105975A

Abstract

The present invention relates to a touch recognition method and device. The touch recognition method comprises: scanning a touchscreen according to a set cycle so as to acquire touch point data; if it is determined that the number of touch points is at least two according to the touch point data, performing interference data filtering on the touch point data, so as to acquire effective touch points; and executing corresponding touch events according to the effective touch points. When the number of the touch points determined according to the touch point data is multiple, interference data filtering is performed on the touch point data, so that accurate touch points actually operated by a user can be acquired, and the touch events corresponding to correct touch points are executed, thereby effectively preventing the touchscreen from generating problems, such as insensitivity to touch, drift and recognition error, when interfering substances such as water mist, water vapour and water damage appear.

Description

The invention relates to a Chinese patent application filed on February 26, 2013, the Chinese Patent Application No. CN 201310060425.7, entitled "Touch Identification Method and Apparatus", the entire contents of which are hereby incorporated by reference. in.

Technical field

The present invention relates to the field of touch screen technologies, and in particular, to a touch recognition method and apparatus.

Background technique

Capacitive touch screens are plated with narrow electrodes on all four sides of the touch screen to form a low voltage alternating electric field in the conductor. When the screen is touched, due to the electric field of the human body, a coupling capacitor is formed between the finger and the conductor layer, and the current from the four electrodes flows to the contact, and the current intensity is proportional to the distance from the finger to the electrode, according to the ratio and strength of the current. The position of the touch point can be accurately calculated. Therefore, the electrical conductor initiates touch feedback whenever any material, such as skin, metal, liquid, or any other material, reaches a certain contact area. This is likely to cause problems such as insensitivity, drift, and recognition errors when the touch screen is exposed to water, mist, water, and other interfering substances.

Therefore, it is necessary to increase the waterproof and anti-fog treatment of the touch screen on the prior art to avoid problems such as insensitive touch, drift, and recognition errors when the touch screen has interference substances such as water mist, water vapor, and water stain. Summary of the invention

In view of the above, the present invention provides a touch recognition method and apparatus that can accurately recognize a touch point operated by a user when water mist, moisture, or water stain occurs on the surface of the touch screen.

In a first aspect, a touch recognition method is provided, the method comprising:

Scan the touch screen according to the set period to obtain touch point data;

If it is determined that the number of touched points is at least two according to the touch point data, performing interference data filtering processing on the touch point data to obtain an effective touch point; A corresponding touch event is performed according to the effective touch point.

In a first possible implementation manner of the first aspect, performing interference data filtering processing on the touch point data to obtain an effective touch point includes: determining a touch point in which a touch period data changes in a current period compared with a previous period Determining an area and/or a shape of the changed touch point according to the touch point data; an area and/or a shape corresponding to the changed touch point and a preset touch point reference area and/or reference The shapes are compared, and a comparison difference is obtained; the touched point where the comparison difference is smaller than a preset threshold is determined as a valid touch point. .

With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner, when the preset touch point reference area and/or the reference shape are multiple, the comparison difference is smaller than the pre- The determined touch point of the set threshold is determined to be a valid touch point, and includes: determining the touch point of the change that the at least one comparison difference is less than a preset threshold as the effective touch point.

In combination with the first aspect or in combination with the first possible implementation of the first aspect or in combination with the second possible implementation of the first aspect, in a third possible implementation manner, in the set period scan After the touch screen acquires the touch point data, the method further includes: determining that the touch point is a valid touch point if the number of touched points is determined to be one according to the touch point data.

In a second aspect, a touch recognition apparatus is provided, the apparatus comprising:

An acquiring unit, configured to scan the touch screen according to the set period to obtain touch point data;

a filtering unit, configured to: if the number of touched points is determined to be at least two according to the touch point data, perform interference data filtering processing on the touch point data to obtain an effective touch point;

And an execution unit, configured to execute a corresponding touch event according to the valid touch point.

In a first possible implementation manner of the second aspect, the filtering unit includes: a first determining module, configured to determine a touch point that changes a touch point data in a current period compared to a previous period; and a second determining module, And determining, by the touch point data, an area and/or a shape of the changed touch point; a comparison module, configured to replace an area and/or a shape corresponding to the changed touch point with a preset touch point Compare the reference area and/or the reference shape and obtain a comparison difference; And a determining module, configured to determine, as the effective touch point, the touched point where the comparison difference is less than a preset threshold.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner, when the preset touch point reference area and/or the reference shape are multiple, the third determining module For: determining, by the at least one touch point whose comparison difference is less than a preset threshold, the touch point as a valid touch point.

With reference to the second aspect or the first possible implementation of the second aspect or the second possible implementation of the second aspect, in a third possible implementation manner, the apparatus further includes: a determining unit, And if it is determined that the number of touched points is one according to the touch point data, determining that the touched point is a valid touched point.

With the above solution, when there are multiple touch points determined by the touch point data, it may be caused by the presence of interfering substances on the touch screen, so the interference data is filtered on the touch point data, and the accurate touch point actually operated by the user can be obtained. The touch event corresponding to the correct touch point is executed, thereby effectively avoiding problems such as insensitive touch, drift, and recognition errors when the touch screen is exposed to water, mist, water, and the like. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a flowchart of a touch recognition method according to Embodiment 1 of the present invention;

2 is a flow chart of performing interference data filtering processing on touch point data according to Embodiment 1 of the present invention;

3 is a schematic structural diagram of a touch recognition apparatus according to Embodiment 2 of the present invention; FIG. 4 is a schematic structural diagram of a filtering unit according to Embodiment 2 of the present invention; FIG. 5 is a schematic diagram of another structure of a touch recognition device according to Embodiment 2 of the present invention; FIG. 6 is a schematic structural diagram of a device with a touch screen according to Embodiment 3 of the present invention.

detailed description

The present invention will be further described in detail with reference to the accompanying drawings, in which FIG. . All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

A touch recognition method according to the first embodiment of the present invention is described in detail with reference to FIG. 1 . FIG. 1 is a flowchart of a touch recognition method according to Embodiment 1 of the present invention. The subject of the touch recognition method is a device having a touch screen. As shown in FIG. 1 , the touch recognition method includes the following steps: Step S110: Scan a touch screen according to a set period to acquire touch point data.

The acquired touch point data may be one or more groups, and each set of touch point data corresponds to one touch point. The touch point data may include: a magnitude of a current emitted by the four electrodes of the touch screen, a ratio of a current magnitude to a distance from the touch point to the electrode, and a data such as a touch point capacitance matrix.

Step S120: If it is determined that the number of touched points is at least two according to the touch point data, performing interference data filtering processing on the touch point data to obtain an effective touch point.

The touch point data obtained by the current touch screen can be used to know the number of touch points and touch points on the current touch screen. When the number of determined touch points is multiple, it may be caused by the multi-touch point operation performed by the user, or may be caused by interference substances (such as water stains, water vapor, mist, etc.) on the surface of the touch screen, so it is impossible to determine this time. Whether the operation is the normal operation of the user. Therefore, if the determined number of touch points is multiple, the acquired touch point data needs to be subjected to interference data filtering processing to obtain an effective touch point, that is, a touch point actually operated by the user.

The process of the specific interference data filtering process is shown in FIG. 2 , which is a flowchart of performing interference data filtering processing on touch point data according to Embodiment 1 of the present invention. Step S121, determining a touch point where the current period is changed compared to the previous period. The touch point data acquired in each cycle is temporarily saved in the memory of the device, so that the touch point data is stored to confirm whether the touch point data has changed in the next cycle. If a change occurs, the point at which the touch point data changes may be the touch point operated by the user.

Specifically, comparing the touch point data of each touch point of the current period with the touch point data of the corresponding position of the previous period, determining whether the touch point data of the touch points changes, to determine the touch of the touch point data changes. point. If there is no touch point at the corresponding position in the previous cycle, the data of the touch point may be considered to change. Since the touch point data generated by the interfering substance is different from the touch point data generated when the user normally touches, the touch point generated by the interfering substance can be excluded by this step. However, at this time, it is not completely determined whether the touch point where the touch point data has changed is generated by the user operation, and therefore further confirmation is required, that is, step S122-step S124 is performed.

Step S122: Determine an area and/or a shape of the touched point that changes according to the touch point data. It can be understood that the number of touch points that change may be one or more. Step S123, comparing the area and/or shape corresponding to the changed touch point with a preset touch point reference area and/or a reference shape, and obtaining a comparison difference.

The touch point reference area and/or the reference shape are preset in the device, and the touch point reference area and/or the reference shape may be multiple, such as a finger touch point reference area and/or a reference shape, a nib touch point reference area, and/or Reference shape, etc.

Step S124: Determine a touch point whose comparison difference is smaller than a preset threshold value as an effective touch point.

The smaller the difference between the area and/or shape corresponding to the touched touch point and the preset touch point reference area and/or reference shape, the closer the touch point is to the touch point reference area and/or Reference shape. Therefore, a threshold can be set in advance, as long as the touch point where the comparison difference is smaller than the threshold value is considered to be a valid touch point.

If the preset touch point reference area and/or reference shape are multiple, only one of them If the comparison difference is less than the threshold, the changed touch point can be confirmed as a valid touch point. For example, a comparison of the changed touch point area and/or shape to the finger touch point reference area and/or the reference shape is greater than a threshold, and the difference from the tip touch point reference area and/or the reference shape is less than a threshold. Then, the touch point is considered to be an operation performed by the user using the stylus, and therefore, it is confirmed as a valid touch point.

By performing interference data filtering processing on the touch point data, the touch points generated by the interference substances in the confirmed plurality of touch points can be excluded, thereby acquiring the touch points generated by the actual operation of the user.

Step S130, executing a corresponding touch event according to the effective touch point.

The device only performs the touch event corresponding to the effective touch point, and does not perform the touch event corresponding to the touch point caused by the interference substance, which can effectively avoid the problem of identifying the error.

In addition, after step S110, the method further includes the following steps: if it is determined that the number of touched points is one according to the touch point data, determining that the touched point is a valid touch point.

If the touch point data is one, and it is considered that there is no interfering substance on the surface of the touch screen, it can be determined that the touch point is a valid touch point, that is, the touch point is a normal operation of the user. Therefore, the touch time corresponding to the effective touch point is directly executed.

With the touch recognition method provided by the first embodiment of the present invention, when the touch points determined by the touch point data are multiple, the interference data is filtered on the touch point data, and the accurate touch point actually operated by the user can be obtained, and then executed correctly. The touch event corresponding to the touch point effectively avoids problems such as insensitive touch, drift, and recognition errors when the touch screen is exposed to water, mist, water, and the like.

The following is a detailed description of a touch recognition device according to a second embodiment of the present invention, and FIG. 3 is a schematic structural diagram of a touch recognition device according to a second embodiment of the present invention. The touch point identification device is placed in a device with a touch screen to implement the touch recognition method provided by the first embodiment of the present invention. As shown in FIG. 3, the touch point identification device includes: an acquisition unit 310, a filtering unit 320, and an execution unit 330.

The obtaining unit 310 is configured to scan the touch screen to acquire touch point data according to a set period. The touch point data acquired by the obtaining unit 310 may be one or more groups, and each set of touch point data corresponds to one touch point. The touch point data may include: a magnitude of a current emitted by the four electrodes of the touch screen, a ratio of a current magnitude to a distance from the touch point to the electrode, and a data such as a touch point capacitance matrix.

The filtering unit 320 is configured to perform interference data filtering processing on the touch point data to obtain an effective touch point if it is determined that the number of touched points is at least two according to the touch point data.

As shown in FIG. 4, it is a schematic structural diagram of a filtering unit of a touch recognition device according to an embodiment of the present invention. The filtering unit 320 includes: a first determining module 321, a second determining module 322, a comparing module 323, and a third determining module 324.

The first determining module 321 is configured to determine a touch point at which the touch point data changes in the current period compared to the previous period.

Specifically, the first determining module 321 compares the touch point data of the touch point of the current period with the touch point data of the corresponding position of the previous period, and determines whether the touch point data of the touch point changes, to determine that the touch point data changes. Touch point. It can be understood that the number of touch points that may change may be one or more. If there is no touch point corresponding to the previous period, the first determining module 321 can confirm that the data of the touch point changes. Since the touch point data generated by the interfering substance is different from the touch point data generated when the user normally touches, the touch point generated by the interfering substance can be excluded by the first determining module 321 . However, at this time, it is not completely determined whether the touch point where the touch point data has changed is caused by a user operation, and therefore other modules are required for further confirmation.

The second determining module 322 is configured to determine an area and/or shape of the changed touch point based on the touch point data.

The comparison module 323 is configured to compare the area and/or shape corresponding to the changed touch point with a preset touch point reference area and/or reference shape, and obtain a comparison difference.

The touch point reference area and/or the reference shape are preset in the device, and the touch point reference area and/or the reference shape may be multiple, such as a finger touch point reference area and/or a reference shape, a nib touch point reference area, and/or Reference shape, etc. The third confirmation module 324 is configured to determine a touch point whose comparison difference is smaller than a preset threshold value as a valid touch point.

If the preset touch point reference area and/or the reference shape are plural, if the one of the comparison differences is less than the threshold, the third confirmation module 324 can confirm the changed touch point as the effective touch point.

The interference data filtering process performed on the touch point data by the filtering unit 320 may exclude the touch points generated by the interference substances in the confirmed plurality of touch points, thereby acquiring the touch points generated by the actual operation of the user.

The execution unit 330 is configured to execute a corresponding touch event according to the effective touch point.

The execution unit 330 performs only the touch event corresponding to the effective touch point, and does not perform the touch point corresponding touch event caused by the interference substance, and the problem of the recognition error can be effectively avoided.

In addition, FIG. 5 is another schematic structural diagram of a touch recognition apparatus according to Embodiment 2 of the present invention. The touch recognition device further includes a determination unit 340.

The determining unit 340 is configured to determine that the touch point is a valid touch point if it is determined that the number of touched points is one according to the touch point data.

If it is determined that the number of touched points is one according to the touch point data, and the interference material is not present on the surface of the touch screen, the determining unit 340 may directly determine that the touched point is a valid touch point, that is, the touched point is a normal operation of the user. Therefore, the execution unit 330 directly performs the touch time corresponding to the effective touch point.

With the touch recognition device provided in the second embodiment of the present invention, when the touch points determined by the touch point data are multiple, the interference data is filtered on the touch point data, and the accurate touch point actually operated by the user can be obtained, and then executed correctly. The touch point corresponds to the touch event, thereby effectively avoiding touch When the screen appears to be disturbed by water mist, water vapor, water stains, etc., the touch is insensitive, drifting, and identifying errors.

It should be noted that the above-mentioned touch recognition apparatus is used to implement the touch recognition method according to the first embodiment, and the included units are only divided according to functional logic, but are not limited to the above division, as long as the corresponding The functions are only applicable; in addition, the specific names of the functional units are only for the purpose of distinguishing each other, and are not intended to limit the scope of protection of the present invention.

In hardware implementation, the above units may be embedded in hardware or in a processor independent of the device having the touch screen, or may be stored in software in a memory of the device having the touch screen, so that the processor calls to execute the above The corresponding operation of the module. The processor can be a central processing unit (CPU), a microprocessor, a microcontroller, or the like.

FIG. 6 is a schematic structural diagram of a device with a touch screen according to Embodiment 3 of the present invention. The touch screen enabled device includes a memory 610 and a processor 620 and a touch screen 630 coupled to the memory 610. Of course, the device with the touch screen may also include a common component such as an antenna, a baseband processing component, a medium-frequency processing component, and an input/output device. The embodiment of the present invention is not limited herein.

The device file information may be stored in the memory 610, and the processor calls the file information stored in the memory 610 to perform the following operations:

Scan the touch screen according to the set period to obtain touch point data;

If it is determined that the number of touched points is at least two according to the touch point data, performing interference data filtering processing on the touch point data to obtain an effective touch point;

A corresponding touch event is performed according to the effective touch point.

Further, performing interference data filtering processing on the touch point data to obtain valid touch points includes:

Determining a touch point at which the touch point data changes in the current period compared to the previous period; determining an area and/or a shape of the changed touch point according to the touch point data; an area corresponding to the changed touch point and/ Or shape with a preset touch point reference Comparing the area and/or the reference shape and obtaining a comparison difference;

The touched point where the comparison difference is smaller than a preset threshold is determined as a valid touch point.

Further, when the preset touch point reference area and/or the reference shape are plural, the touch point whose comparison difference is smaller than a preset threshold is determined as a valid touch point, including :

The touched point at which the at least one comparison difference is less than a preset threshold is determined as a valid touch point.

Further, the processor 620 is further configured to perform the following operations:

If it is determined that the number of touched points is one according to the touch point data, the touched point is determined to be a valid touched point.

With the device with the touch screen provided by the third embodiment of the present invention, when the touch points determined by the touch point data are multiple, the interference data is filtered on the touch point data, and the accurate touch point actually operated by the user can be obtained, and then executed. The touch event corresponding to the correct touch point effectively avoids problems such as insensitive touch, drift, and recognition errors when the touch screen is exposed to water, mist, water, and other interfering substances.

A person skilled in the art should further appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both, in order to clearly illustrate hardware and software. Interchangeability, the composition and steps of the various examples have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

The steps of a method or algorithm described in connection with the embodiments disclosed herein can be implemented in hardware, a software module executed by a processor, or a combination of both. Software modules can be placed in random access memory (RAM), memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, A storage device, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

The above described embodiments of the present invention are further described in detail, and the embodiments of the present invention are intended to be illustrative only. The scope of the protection, any modifications, equivalents, improvements, etc., made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

claims

1. A touch recognition method, characterized in that the method includes:

Scan the touch screen to obtain touch point data according to the set period;

If the number of touch points is determined to be at least two according to the touch point data, perform interference data filtering processing on the touch point data to obtain effective touch points;

Execute corresponding touch events according to the effective touch points.

2. The method according to claim 1, wherein performing interference data filtering processing on the touch point data to obtain effective touch points includes:

Determine the touch points whose touch point data has changed in the current cycle compared with the previous cycle;

Determine the area and/or shape of the changed touch point according to the touch point data; compare the area and/or shape corresponding to the changed touch point with the preset reference area and/or reference shape of the touch point Compare and obtain the difference;

The changed touch point whose comparison difference value is less than a preset threshold is determined as a valid touch point.

3. The method according to claim 2, characterized in that when there are multiple preset touch point reference areas and/or reference shapes, the comparison will be made between the ones whose difference is less than the preset threshold. The changed touch points are determined as valid touch points, including:

The changed touch point with at least one comparison difference value less than a preset threshold is determined as a valid touch point.

4. The method according to any one of claims 1 to 3, characterized in that, after scanning the touch screen to obtain touch point data according to the set period, the method further includes:

If the number of touch points is determined to be one according to the touch point data, the touch point is determined to be a valid touch point.

5. A touch recognition device, characterized in that the device includes:

The acquisition unit is used to scan the touch screen to acquire touch point data according to a set period;

a filtering unit, configured to: if the number of touch points is determined to be at least two according to the touch point data, The touch point data is subjected to interference data filtering processing to obtain effective touch points;

An execution unit, configured to execute corresponding touch events according to the effective touch points.

6. The device according to claim 5, characterized in that the filtering unit includes: a first determination module, used to determine the touch point where the touch point data changes in the current period compared with the previous period;

a second determination module, configured to determine the area and/or shape of the changed touch point according to the touch point data;

A comparison module for comparing the area and/or shape corresponding to the changed touch point with a preset touch point reference area and/or reference shape, and obtaining a comparison difference;

A third determination module, configured to determine the changed touch point where the comparison difference is less than a preset threshold as a valid touch point.

7. The device according to claim 6, wherein when there are multiple preset touch point reference areas and/or reference shapes, the third determination module is used to:

8. The device according to any one of claims 5 to 7, characterized in that, the device further includes: a determining unit, configured to determine the touch point if the number of touch points is determined to be one according to the touch point data. is a valid touch point.