CN103970372B - Method for treating scanning asynchronism of infrared touch screen and infrared touch screen - Google Patents

Abstract

The embodiment of the present invention discloses a method for dealing with scanning asynchronous infrared touch screens, which is used to reduce the impact caused by asynchronous scanning, prevent the increase in the production cost of infrared touch screens caused by this, and facilitate the sales and popularization of infrared touch screens. The method in the embodiment of the present invention includes: S1: acquiring the covered area of the infrared touch screen; S2: expanding the covered area according to a preset size value; S3: calculating the enlarged area according to a preset center of gravity solution method The area center of gravity of the covered area; S4: Determine the area center of gravity as the actual touch point of the infrared touch screen. The embodiment of the present invention also provides an infrared touch screen. The embodiment of the present invention can reduce the influence caused by scanning asynchrony, prevent the increase in the production cost of the infrared touch screen caused by it, and is beneficial to the sales and popularization of the infrared touch screen.

Description

Method for processing out-of-sync scanning of infrared touch screen and infrared touch screen

technical field

The invention relates to the field of human-computer interaction, in particular to a method for processing asynchronous scanning of an infrared touch screen and an infrared touch screen.

Background technique

Infrared technology touch screen (Infrared Touch Screen Technology, referred to as infrared touch screen) is composed of infrared emitting and receiving sensing elements installed on the outer frame of the touch screen. On the surface of the screen, an infrared detection network is formed. Any touching object can change the infrared rays on the contact point. And realize the touch screen operation.

Infrared touch screen generally installs an outer frame in front of the display, and a circuit board is designed in the outer frame, so that infrared emitting tubes and infrared receiving tubes are arranged on the four sides of the screen to realize the function of touch operation.

At present, the scanning direction of the infrared touch frame is basically sequential scanning, that is, scanning from one side to the other. However, since the touch points (hands, pens, etc.) have moving speeds, and scanning will also take time, there will be asynchronous situations. The case where the touch area is large. Most of the solutions currently used are to speed up the scanning speed as much as possible and reduce the scanning time, thereby reducing the impact of scanning asynchrony.

However, increasing the scanning speed requires faster processors, components and more complex circuits, which all lead to an increase in the production cost of the infrared touch screen, which is not conducive to the sales and popularization of the infrared touch screen.

Contents of the invention

Embodiments of the present invention provide a method for dealing with asynchronous scanning of infrared touch screens and an infrared touch screen, which can reduce the impact caused by asynchronous scanning, prevent the increase in production costs of infrared touch screens, and facilitate the sales and popularization of infrared touch screens.

A method for processing out-of-sync infrared touch screen scanning provided by an embodiment of the present invention includes:

S1: Obtain the blocked area of the infrared touch screen;

S2: Enlarging the covered area according to a preset size value;

S3: Calculate the area center of gravity of the enlarged covered area according to the preset center of gravity solution method;

S4: Determine the center of gravity of the area as an actual touch point of the infrared touch screen.

Optionally, step S3 specifically includes:

S31: Determine whether the enlarged covered area overlaps, if yes, execute step S32, if not, execute step S33;

S32: Divide the enlarged covered area into N sub-areas using an overlapping calculation method, where N is greater than or equal to 2;

S33: taking the enlarged covered area as a sub-area;

S34: Calculate the area centers of gravity of the sub-areas according to the preset center of gravity solution method to obtain M centers of gravity of the areas, where M is greater than or equal to 1.

Optionally, step S32 specifically includes:

Obtain the overlapping area of the expanded occluded area;

obtaining a center of symmetry of said overlapping region;

The enlarged shaded area is divided into N sub-areas according to the center of symmetry, where N is greater than or equal to 2.

Optionally, step S34 specifically includes:

Obtain the overlapping part of the sub-region, the overlapping part is formed by overlapping the corresponding sub-regions in several different scanning directions, and is a convex polygon, and there is a corresponding relationship between the sub-region and the overlapping part, and the overlapping part has M, M greater than or equal to 1;

The area center of gravity of each overlapping part is calculated according to the convex polygon center of gravity solution method, and M said area centers of gravity are obtained.

Optionally, the method also includes:

The obtained actual touch point is fed back to the infrared touch screen in the form of touch coordinates.

An infrared touch screen provided by an embodiment of the present invention includes:

An acquisition module, configured to acquire the blocked area of the infrared touch screen;

A size expansion module, configured to expand the covered area according to a preset size value;

A center-of-gravity solution module, configured to calculate the area center of gravity of the covered area according to a preset center-of-gravity solution method;

A determining module, configured to determine the center of gravity of the area as the actual touch point of the infrared touch screen.

Optionally, the center of gravity solving module specifically includes:

A judging unit, configured to judge whether there is overlap in the enlarged covered area, if yes, execute step S32, and if not, execute step S33;

The area segmentation unit is used to divide the enlarged covered area into N sub-areas using an overlapping calculation method, and N is greater than or equal to 2;

A partition unit, configured to use the enlarged covered area as a sub-region;

The center-of-gravity solving unit is used to calculate the regional centers of gravity of the sub-regions according to a preset method for solving the center of gravity, and obtain M center-of-gravity of the regions, where M is greater than or equal to 1.

Optionally, the region segmentation unit specifically includes:

Acquiring subunits, used to obtain the overlapping area of the expanded occluded area;

a symmetry center subunit, configured to obtain the symmetry center of the overlapping region;

The cutting sub-unit is configured to cut the enlarged shaded area into N sub-areas according to the center of symmetry, where N is greater than or equal to 2.

Optionally, the center of gravity solving unit specifically includes:

The overlapping subunit is used to obtain the overlapping part of the sub-region, the overlapping part is formed by overlapping the corresponding sub-regions in several different scanning directions, and is a convex polygon, and the sub-region has a corresponding relationship with the overlapping part , there are M overlapping parts, and M is greater than or equal to 1;

The area center of gravity subunit is used to calculate the area center of gravity of each overlapping part according to the convex polygon center of gravity solution method, and obtain M said area centers of gravity.

Optionally, the infrared touch screen also includes:

A feedback module, configured to feed back the obtained actual touch point to the infrared touch screen in the form of touch coordinates.

It can be seen from the above technical solutions that the embodiments of the present invention have the following advantages:

In the embodiment of the present invention, the specific steps of the method for dealing with the out-of-sync scanning of the infrared touch screen are: acquiring the covered area of the infrared touch screen; expanding the covered area according to the preset size value; solving the problem according to the preset center of gravity Calculate the area center of gravity of the enlarged covered area by using the method; determine the area center of gravity as the actual touch point of the infrared touch screen. In the embodiment of the present invention, by using an algorithm processing method to calculate the actual touch point of the covered area, the actual touch point of the infrared touch screen can be obtained without requiring faster processing speed of the processor and components, and without complex circuits. The point is to minimize the impact caused by scanning asynchrony, prevent the increase in the production cost of the infrared touch screen caused by this, and facilitate the sales and popularization of the infrared touch screen.

Description of drawings

FIG. 1 is a flowchart of an embodiment of a method for processing out-of-sync infrared touch screen scanning in an embodiment of the present invention;

Fig. 2 is a flow chart of another embodiment of the method for processing out-of-sync infrared touch screen scanning in the embodiment of the present invention;

FIG. 3 is a flow chart of another embodiment of the method for processing out-of-sync infrared touch screen scanning in the embodiment of the present invention;

Fig. 4 is the schematic diagram of the center of gravity method of quadrilateral in the embodiment of the present invention;

Fig. 5 is the schematic diagram of the center of gravity method of pentagon in the embodiment of the present invention;

FIG. 6 is a schematic diagram of the covered area of the infrared touch screen in two cases in the embodiment of the present invention;

FIG. 7 is a schematic diagram of enlarged blocked areas of the infrared touch screen in two cases in the embodiment of the present invention;

Fig. 8 is a schematic diagram of four groups of preset oblique scan areas cutting sub-areas in the embodiment of the present invention;

FIG. 9 is a structural diagram of an embodiment of an infrared touch screen in an embodiment of the present invention;

Fig. 10 is a structural diagram of another embodiment of an infrared touch screen in the embodiment of the present invention.

detailed description

Embodiments of the present invention provide a method for dealing with asynchronous scanning of infrared touch screens and an infrared touch screen, which are used to reduce the impact caused by asynchronous scanning, prevent the increase in production costs of infrared touch screens caused by this, and facilitate the sales and popularization of infrared touch screens.

In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to FIG. 1, an embodiment of a method for processing out-of-sync infrared touch screen scanning in an embodiment of the present invention includes:

S1: Obtain the blocked area of the infrared touch screen;

When an object touches the infrared touch screen, the blocked area of the infrared touch screen is acquired.

S2: Enlarging the blocked area according to a preset size value;

After the blocked area of the infrared touch screen is acquired, the blocked area can be enlarged according to a preset size value.

S3: Calculate the area center of gravity of the enlarged blocked area according to the preset center of gravity solution method;

After the occluded area is expanded, the area center of gravity of the expanded occluded area can be calculated according to a preset center of gravity solution method.

S4: Determine the center of gravity of the area as the actual touch point of the infrared touch screen.

After the area center of gravity of the blocked area is obtained, the area center of gravity is determined as the actual touch point of the infrared touch screen.

In this embodiment, the steps of the above-mentioned method for processing out-of-sync scanning of the infrared touch screen are as follows: obtain the blocked area of the infrared touch screen; expand the blocked area according to the preset size value; Calculate the area center of gravity of the enlarged covered area; determine the area center of gravity as the actual touch point of the infrared touch screen. In this embodiment, the actual touch point of the covered area is calculated by using an algorithm processing method, without requiring faster processing speed of the processor and components, and without complex circuits, the actual touch point of the infrared touch screen can be obtained , minimizing the impact caused by scanning asynchrony, preventing the increase in the production cost of the infrared touch screen caused by this, and being conducive to the sales and popularization of the infrared touch screen.

For ease of understanding, the following is a detailed description of the method for processing out-of-sync scanning of the infrared touch screen in the embodiment of the present invention. Please refer to FIG. 2. Another embodiment of the method for processing out-of-sync scanning of the infrared touch screen in the embodiment of the present invention includes:

201. Obtain the blocked area of the infrared touch screen;

When an object touches the infrared touch screen, the blocked area of the infrared touch screen can be obtained. It can be understood that, because the infrared touch screen has a problem of asynchronous scanning, the blocked area at this time is not consistent with the actual touched area.

It should be noted that the blocked area may include scanning areas obtained by scanning in several different scanning directions. The scanning direction can be divided into forward scanning and oblique scanning. Forward scanning means that the scanning line is parallel to the Y axis and is carried out along the X axis. Scanning, or the scanning method in which the scanning line is parallel to the X axis and scanning along the Y axis, while oblique scanning is a scanning method in which there is a certain inclination angle between the scanning line and the X and Y axes, and then scanning along the X or Y axis scanning method. Depending on the tilt angle, different oblique sweeps can be performed. Thus the shaded area may comprise several scan areas obtained from different scan directions.

202. Expand the blocked area according to a preset size value;

After the blocked area of the infrared touch screen is acquired, the blocked area can be enlarged according to a preset size value.

It should be noted that the preset size value can be set according to the actual parameters of the infrared touch screen, so that the size value can expand the blocked area within a reasonable range. Since the actual parameters of different types of infrared touch screens are different, the size value can also be set according to different types of infrared touch screens.

203. Determine whether the enlarged covered area overlaps, if yes, execute step 204, if not, execute step 205;

After the occluded area is expanded according to the preset size value, it is necessary to determine whether the enlarged occluded area overlaps, if yes, perform step 204 , and if not, perform step 205 .

It should be noted that since the infrared touch screen can be single-touch or multi-touch, when the blocked area is generated by multi-touch operation, there may be multiple blocked areas, because multiple The occluded areas may be very close to each other, so after the occluded areas are expanded, there may be overlaps between the occluded areas, so it should be judged whether there is overlap between the expanded occluded areas, and if so, perform the steps 204. If not, go to step 205.

204. Divide the enlarged covered area into N sub-areas by using an overlapping calculation method;

When it is judged that there is overlap in the enlarged covered area, use an overlapping calculation method to divide the enlarged covered area into N sub-regions, where N is greater than or equal to 2.

205. Taking the enlarged covered area as a sub-area;

After it is determined that there is no overlap between the enlarged covered regions, the enlarged blocked regions may be used as sub-regions. It can be understood that, since there may be several blocked regions, after the enlarged blocked regions are used as sub-regions, there are corresponding several sub-regions.

206. Calculate the area center of gravity of the sub-area according to the preset center of gravity solution method, and obtain M centers of gravity of the area;

After obtaining the sub-area, the area center of gravity of the sub-area can be calculated according to the preset center-of-gravity solution method to obtain M barycenters of the area, where M is greater than or equal to 1.

207. Determine the center of gravity of the area as the actual touch point of the infrared touch screen;

After the area center of gravity of each sub-area is calculated, the area center of gravity can be determined as the actual touch point of the infrared touch screen.

208 . Feed back the obtained actual touch point to the infrared touch screen in the form of touch coordinates.

After obtaining the actual touch points of the infrared touch screen, the obtained actual touch points can be fed back to the infrared touch screen in the form of touch coordinates, and then the infrared touch screen can perform more accurate operations according to these actual touch points. Since the actual touch point largely eliminates the influence caused by the asynchronous scanning, the touch screen experience of the infrared touch screen is more accurate and the user experience is better.

The above mainly describes a method for dealing with infrared touch screen scanning asynchronously from the perspective of how to divide the sub-regions. The following will describe the overlapping calculation method and the center of gravity solution method in this method in detail. Please refer to FIG. 3, an embodiment of the present invention Another embodiment of a method for processing out-of-sync infrared touch screen scanning includes:

301. Obtain the blocked area of the infrared touch screen;

When an object touches the infrared touch screen, the blocked area of the infrared touch screen can be obtained. It can be understood that, because the infrared touch screen has a problem of asynchronous scanning, the blocked area at this time is not consistent with the actual touched area.

It should be noted that the blocked area may include scanning areas obtained by scanning in several different scanning directions. The scanning direction can be divided into forward scanning and oblique scanning. Forward scanning means that the scanning line is parallel to the Y axis and is carried out along the X axis. Scanning, or the scanning method in which the scanning line is parallel to the X axis and scanning along the Y axis, while oblique scanning is a scanning method in which there is a certain inclination angle between the scanning line and the X and Y axes, and then scanning along the X or Y axis scanning method. Depending on the tilt angle, different oblique sweeps can be performed. Thus the shaded area may comprise several scan areas obtained from different scan directions.

302. Expand the blocked area according to a preset size value;

After the blocked area of the infrared touch screen is acquired, the blocked area can be enlarged according to a preset size value.

It should be noted that the preset size value can be set according to the actual parameters of the infrared touch screen, so that the size value can expand the blocked area within a reasonable range. Since the actual parameters of different types of infrared touch screens are different, the size value can also be set according to different types of infrared touch screens.

303. Determine whether the enlarged covered area overlaps, if yes, execute step 304, if not, execute step 307;

After expanding the covered area according to the preset size value, it is necessary to judge whether the enlarged covered area overlaps, if yes, execute step 304 , if not, execute step 307 .

It should be noted that since the infrared touch screen can be single-touch or multi-touch, when the blocked area is generated by multi-touch operation, there may be multiple blocked areas, because multiple The occluded areas may be very close to each other, so after the occluded areas are expanded, there may be overlaps between the occluded areas, so it should be judged whether there is overlap between the expanded occluded areas, and if so, perform the steps 304. If not, go to step 307.

304. Obtain the overlapping area of the enlarged covered area;

After it is judged that the enlarged occluded regions overlap, it is necessary to obtain the overlapping region of the enlarged occluded regions.

305. Obtain the center of symmetry of the overlapping area;

After obtaining the overlapping area of the expanded occluded area, the center of symmetry of the overlapping area can be obtained. It can be understood that the center of symmetry can reasonably divide the overlapping area.

It should be noted that, here, the axis of symmetry or the center of gravity of the overlapping area may also be obtained, and then in step 306 the blocked area is reasonably cut according to the axis of symmetry or the center of gravity. This embodiment chooses to obtain the center of symmetry because the center of symmetry is closer to the requirement of equal division in terms of the shape of the region, but it can also be selected to obtain the axis of symmetry or the center of gravity when the actual application situation requires it.

306. Cut the enlarged covered area into N sub-areas according to the symmetry center;

After obtaining the center of symmetry of the overlapping area, the enlarged covered area may be divided into N sub-areas according to the center of symmetry, where N is greater than or equal to 2.

It should be noted that the number N of sub-regions after cutting should be the same as the number before the expansion of the covered area, that is to say, the two covered areas overlap after being enlarged, and two sub-regions should be obtained after cutting them according to the center of symmetry. .

307. Taking the enlarged covered area as a sub-area;

After it is determined that there is no overlap between the enlarged covered regions, the enlarged blocked regions may be used as sub-regions. It can be understood that, since there may be several blocked regions, after the enlarged blocked regions are used as sub-regions, there are corresponding several sub-regions.

308. Obtain overlapping parts of the sub-regions;

After obtaining the sub-region, the overlapping part of the sub-region can be obtained. The overlapping part is formed by overlapping corresponding sub-regions in several different scanning directions and is a convex polygon. There is a corresponding relationship between the sub-region and the overlapping part. There are M overlapping parts, and M is greater than or equal to 1.

It should be noted that since each blocked area can include several scanning areas obtained from different scanning directions, when the blocked area is divided into sub-areas, the sub-areas can also include corresponding several scanning areas obtained from different scanning directions. For the scanning sub-areas obtained in the scanning direction, the overlapping portion of these scanning sub-areas is the overlapping portion of the sub-area. The overlapping portion is a convex polygon, and the number of the overlapping portion is consistent with the number of the covered area and the number of the sub-regions.

309. Calculate the area center of gravity of each overlapping part according to the convex polygon center of gravity solution method, and obtain M center of gravity of the area;

After obtaining the overlapping portion of the oblique sweep area and the sub-area, the area center of gravity of each overlapping portion can be calculated according to the convex polygon barycenter solution method to obtain M center of gravity of the area.

310. Determine the center of gravity of the area as an actual touch point of the infrared touch screen;

After the area center of gravity of each sub-area is calculated, the area center of gravity can be determined as the actual touch point of the infrared touch screen.

311. Feed back the obtained actual touch point to the infrared touch screen in the form of touch coordinates.

After obtaining the actual touch points of the infrared touch screen, the obtained actual touch points can be fed back to the infrared touch screen in the form of touch coordinates, and then the infrared touch screen can perform more accurate operations according to these actual touch points. Since the actual touch point largely eliminates the influence caused by the asynchronous scanning, the touch screen experience of the infrared touch screen is more accurate and the user experience is better.

The above mainly describes a method for dealing with the asynchronous scanning of the infrared touch screen. The method for solving the center of gravity of the convex polygon in the embodiment corresponding to Fig. 3 will be described in detail below, please refer to Fig. 4 and Fig. 5:

First, deduce the method of center of gravity from the principle;

How to do the center of gravity of the quadrilateral: Please refer to Figure 4, connect a diagonal line of the quadrilateral, so that the quadrilateral becomes a combination of two triangles, respectively draw the center of gravity of the two triangles, and connect the two centers of gravity to form a line segment AB; Theoretically, connect another diagonal line of the quadrilateral, and the quadrilateral becomes a combination of two other triangles. Make the centers of gravity of these two triangles respectively, and connect the two centers of gravity to form a line segment CD, then the intersection point of the line segments AB and CD is the center of gravity of the quadrilateral.

How to do the center of gravity of the pentagon: Please refer to Figure 5, connect any diagonal line of the pentagon, divide the pentagon into a combination of a triangle and a quadrilateral, and make the center of gravity of the triangle and the center of gravity of the quadrilateral respectively , and connect them into a line segment AB; connect the other diagonal of the pentagon, divide the pentagon into a combination of another triangle and a quadrilateral, draw the centroids of the triangle and the quadrilateral respectively, and connect them into a line segment CD; then The intersection of AB and CD is the center of gravity of the pentagon.

Through mathematical induction, we can know that for hexagons, heptagons, and N-gons, the above method can be used to connect a diagonal line first, and convert the N-gons into a triangle and (N-1)-gon , or a quadrilateral and a (N-2) polygon, and then make the center of gravity respectively, and connect them into a line segment, and then connect another object line, respectively make the center of gravity of two combined bodies and connect them into a line segment, and the intersection point of the two line segments is N The center of gravity of the polygon.

Therefore, it can be known that the area center of gravity of the overlapped part in the embodiment corresponding to FIG. 3 can be easily obtained through the method of solving the center of gravity of a convex polygon.

For ease of understanding, according to the embodiment described in FIG. 3 , a practical application scenario is used below to describe the method for processing out-of-sync infrared touch screen scanning in the embodiment of the present invention:

A: Touch the infrared touch screen, please refer to Figure 6. At this time, the blocked area on the infrared touch screen is the overlapping rectangular frame part in Figure 6. Since the touch point is moving, when the moving direction of the touch point is the same as the scanning direction, the finally obtained blocked area will be larger, as shown in Figure 6a; when the moving direction of the touch point is opposite to the scanning direction, the finally obtained blocked area The occluded area will be smaller, as shown in Figure 6b.

B: Expand the occluded area, as shown in Figure 7.

C: Determine whether the occluded area overlaps, and then obtain the sub-area corresponding to the occluded area.

D: There are several scanning sub-regions obtained from different scanning directions in this sub-region, and the overlapping part of these scanning sub-regions is the overlapping part of this sub-region, as shown in FIG. 8 . In FIG. 8 , four sets of scanning sub-regions obtained by oblique scanning are used, which are respectively 801 , 802 , 803 , and 804 , and two groups of scanning sub-regions obtained by forward scanning are respectively 805 and 806 .

E: Calculate the area center of gravity of each overlapping part according to the convex polygon center of gravity solution method, then the area center of gravity is the actual touch point of the infrared touch screen.

F: Feedback the actual touch point to the infrared touch screen in the form of touch coordinates, and end.

The above mainly describes a method for dealing with asynchronous scanning of an infrared touch screen. An infrared touch screen will be described in detail below. Please refer to FIG. 9. An embodiment of an infrared touch screen in an embodiment of the present invention includes:

An acquisition module 901, configured to acquire the blocked area of the infrared touch screen;

A size expansion module 902, configured to expand the blocked area according to a preset size value;

The center of gravity solution module 903 is used to calculate the area center of gravity of the blocked area according to the preset center of gravity solution method;

The determining module 904 is configured to determine the center of gravity of the area as the actual touch point of the infrared touch screen.

In this embodiment, the acquiring module 901 acquires the blocked area of the infrared touch screen; then, the size expanding module 902 expands the blocked area according to the preset size value; then, the center of gravity solving module 903 uses the preset center of gravity solving method Calculate the area center of gravity of the enlarged covered area; finally, the determination module 904 determines the area center of gravity as the actual touch point of the infrared touch screen. In this embodiment, the actual touch point of the covered area is calculated by using an algorithm processing method, without requiring faster processing speed of the processor and components, and without complex circuits, the actual touch point of the infrared touch screen can be obtained , minimizing the impact caused by scanning asynchrony, preventing the increase in the production cost of the infrared touch screen caused by this, and being conducive to the sales and popularization of the infrared touch screen.

For ease of understanding, an infrared touch screen in an embodiment of the present invention is described in detail below, please refer to FIG. 10 , another embodiment of an infrared touch screen in an embodiment of the present invention includes:

An acquisition module 101, configured to acquire the blocked area of the infrared touch screen;

A size expansion module 102, configured to expand the blocked area according to a preset size value;

The center of gravity solution module 103 is used to calculate the area center of gravity of the blocked area according to the preset center of gravity solution method;

The determination module 104 is configured to determine the center of gravity of the area as the actual touch point of the infrared touch screen.

In this embodiment, the center of gravity solving module 103 may specifically include:

The judging unit 1031 is used to judge whether the enlarged covered area overlaps, if so, trigger the area division unit 1032, and if not, trigger the partition unit 1033;

The area segmentation unit 1032 is used to divide the enlarged covered area into N sub-areas using an overlapping calculation method, where N is greater than or equal to 2;

A partition unit 1033, configured to use the enlarged covered area as a sub-region;

The center of gravity solving unit 1034 is used to calculate the area center of gravity of the sub-area according to the preset center of gravity solution method to obtain M centers of gravity of the area, where M is greater than or equal to 1.

In this embodiment, the region segmentation unit 1032 may specifically include:

The obtaining subunit 10321 is used to obtain the overlapping area of the enlarged covered area;

A symmetry center subunit 10322, configured to obtain the symmetry center of the overlapping area;

The cutting sub-unit 10323 is configured to cut the enlarged shaded area into N sub-areas according to the center of symmetry, where N is greater than or equal to 2.

In this embodiment, the center of gravity solving unit 1034 may specifically include:

The overlapping sub-unit 10341 is used to obtain the overlapping part of the sub-region. The overlapping part is formed by overlapping corresponding sub-regions in different scanning directions, and is a convex polygon. There is a corresponding relationship between the sub-region and the overlapping part. There are M parts, and M is greater than or equal to 1;

The area center of gravity subunit 10342 is used to calculate the area center of gravity of each overlapping part according to the convex polygon barycenter solution method, and obtain M such area centers of gravity.

In this embodiment, the infrared touch screen can also include:

The feedback module 105 is configured to feed back the obtained actual touch point to the infrared touch screen in the form of touch coordinates.

In this embodiment, the acquisition module 101 acquires the blocked area of the infrared touch screen; then, the size expansion module 102 expands the blocked area according to the preset size value; Calculate the area center of gravity of the enlarged covered area; finally, the determination module 104 determines the area center of gravity as the actual touch point of the infrared touch screen. In this embodiment, the actual touch point of the covered area is calculated by using an algorithm processing method, without requiring faster processing speed of the processor and components, and without complex circuits, the actual touch point of the infrared touch screen can be obtained , minimizing the impact caused by scanning asynchrony, preventing the increase in the production cost of the infrared touch screen caused by this, and being conducive to the sales and popularization of the infrared touch screen. Further, the feedback module 105 feeds back the obtained actual touch point to the infrared touch screen in the form of touch coordinates, so that the infrared touch screen can respond more quickly to the actual touch point.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-OnlyMemory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes.

As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still understand the foregoing The technical solutions recorded in each embodiment are modified, or some of the technical features are replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (6)

1. A method for processing infrared touch screen scanning asynchrony, characterized in that, comprising: S1: Obtain the blocked area of the infrared touch screen; S2: Enlarging the covered area according to a preset size value; S3: Calculate the area center of gravity of the enlarged covered area according to the preset center of gravity solution method; S4: Determine the center of gravity of the area as the actual touch point of the infrared touch screen; Step S3 specifically includes: S31: Determine whether the enlarged covered area overlaps, if yes, execute step S32, if not, execute step S33; S32: Divide the enlarged covered area into N sub-areas using an overlapping calculation method, where N is greater than or equal to 2; S33: taking the enlarged covered area as a sub-area; S34: Calculate the area centers of gravity of the sub-areas according to the preset center of gravity solution method to obtain M centers of gravity of the areas, where M is greater than or equal to 1; Step S34 specifically includes: Obtain the overlapping part of the sub-region, the overlapping part is formed by overlapping the corresponding sub-regions in several different scanning directions, and is a convex polygon, and there is a corresponding relationship between the sub-region and the overlapping part, and the overlapping part has M, M greater than or equal to 1; The area center of gravity of each overlapping part is calculated according to the convex polygon center of gravity solution method, and M said area centers of gravity are obtained. 2. The method according to claim 1, wherein step S32 specifically comprises: Obtain the overlapping area of the expanded occluded area; obtaining a center of symmetry of said overlapping region; The enlarged shaded area is divided into N sub-areas according to the center of symmetry, where N is greater than or equal to 2. 3. The method according to claim 1 or 2, characterized in that the method further comprises: The obtained actual touch point is fed back to the infrared touch screen in the form of touch coordinates. 4. An infrared touch screen, characterized in that, comprising: An acquisition module, configured to acquire the blocked area of the infrared touch screen; A size expansion module, configured to expand the covered area according to a preset size value; A center-of-gravity solution module, configured to calculate the area center of gravity of the covered area according to a preset center-of-gravity solution method; A determining module, configured to determine the center of gravity of the area as the actual touch point of the infrared touch screen; The center of gravity solving module specifically includes: The judging unit is used to judge whether there is overlap in the enlarged covered area, if so, trigger the area division unit, and if not, trigger the partition unit; The area segmentation unit is used to divide the enlarged covered area into N sub-areas using an overlapping calculation method, and N is greater than or equal to 2; A partition unit, configured to use the enlarged covered area as a sub-region; The center of gravity solving unit is used to calculate the regional centers of gravity of the sub-regions according to the preset center of gravity solving method to obtain M centers of gravity of the regions, and M is greater than or equal to 1; The center of gravity solving unit specifically includes: The overlapping subunit is used to obtain the overlapping part of the sub-region, the overlapping part is formed by overlapping the corresponding sub-regions in several different scanning directions, and is a convex polygon, and the sub-region has a corresponding relationship with the overlapping part , there are M overlapping parts, and M is greater than or equal to 1; The area center of gravity subunit is used to calculate the area center of gravity of each overlapping part according to the convex polygon center of gravity solution method, and obtain M said area centers of gravity. 5. The infrared touch screen according to claim 4, wherein the region dividing unit specifically comprises: Acquiring subunits, used to obtain the overlapping area of the expanded occluded area; a symmetry center subunit, configured to obtain the symmetry center of the overlapping region; The cutting sub-unit is configured to cut the enlarged shaded area into N sub-areas according to the center of symmetry, where N is greater than or equal to 2. 6. The infrared touch screen according to claim 4 or 5, wherein the infrared touch screen further comprises: A feedback module, configured to feed back the obtained actual touch point to the infrared touch screen in the form of touch coordinates.