WO2014082509A1

WO2014082509A1 - Method and system for responding to touch operation of user in edge area of touch screen, and touch screen terminal

Info

Publication number: WO2014082509A1
Application number: PCT/CN2013/085730
Authority: WO
Inventors: 毛建平
Original assignee: 深圳市汇顶科技股份有限公司
Priority date: 2012-11-30
Filing date: 2013-10-22
Publication date: 2014-06-05
Also published as: CN103034383B; CN103034383A

Abstract

The present invention is applicable to the technical field of touch screens, and provides a method and system for responding to a touch operation of a user in an edge area of a touch screen, and a touch screen terminal. In the present invention, for calculation f a coordinate of a touched point, from the entirety of a touch screen matrix, first, two-dimensional matrix sampled data on the touch screen is converted into an X-direction original one-dimensional array and a Y-direction original one-dimensional array, and then, virtual sampled values of the one-dimensional arrays at an outer side of the edge are calculated to perform additional correction on the one-dimensional arrays, and enable a method for calculating a coordinate of a touched point in the edge area in the touch screen to be the same as a method for calculating a coordinate of a touched point in a central area; therefore, high linearity can be maintained with a touched point in the central area, and a touch operation used for the edge area is truly restored.

Description

Method, system and touch screen terminal for responding to user touch operation in touch screen edge area

The invention belongs to the technical field of touch screens, and in particular, to a method, a system and a touch screen terminal for responding to a user's touch operation in an edge area of a touch screen. Background technique

Capacitive touch screens are increasingly used in many electronic products. The basic implementation of the coordinates is: Set the capacitive matrix of the sample on the screen, and calculate the coordinates of the touched point using a certain algorithm. When a certain point in the central area of the screen is touched, as shown in A1 of Figure 1, in order to ensure that the coordinates of A1 can be accurately calculated, the data of each adjacent point around it will participate in the operation, but since the capacitance matrix must be smaller than the physical of the screen Dimensions, when a certain point in the edge area of the touch screen is touched, as shown in A2 in Figure 1, the data of the adjacent points of the touched point is incomplete. At this time, the data participating in the A2 coordinate calculation must be incomplete, if the adjacent neighbors of A2 are still used. The matrix data is calculated for coordinates and the result will be distorted. Taking the straight line shown in Fig. 2 as an example, if the line B1 and the point B2 are drawn in a straight line, the calculated coordinates at B1 and B2 cannot be linear with the coordinates of the touched point in the central area, and the distortion appears at both ends of the straight line.

In order to keep the touched point of the edge area and the touched point of the central area linear, there is a current processing method of making a non-orthogonal line from the central area of the touch screen to the outer frame of the touch screen, and then dividing the line into linearity. The better region and the linearity of the worse region, and further derive the linear offset scale factor of the line and thereby establish a linear processing model, and finally use the model to correct the coordinates of the touched point of the edge region.

The above linear processing method first determines the linearity of the non-orthogonal line and the worse area. If the division results of the two regions are different, the final correction result is also different, so the above processing method may not be able to restore the most True linear results. Summary of the invention

A first technical problem to be solved by the present invention is to provide a method for responding to a user's touch operation by an edge region of a touch screen, which is intended to truly restore a user's touch operation. The present invention is implemented in such a manner that a touch screen edge area responds to a user's touch operation, including the following steps:

Converting the two-dimensional matrix sampling data on the touch screen into two original one-dimensional arrays in the X direction and the Y direction; wherein each value in the original one-dimensional array in the X direction is respectively composed of the sampling data of each column, and the original in the Y direction Each value in a one-dimensional array is composed of summed sample data of each row;

Calculating a first-order virtual sample value located outside the edge region according to three values of the outermost edge of the original one-dimensional array in the X direction and the Y direction, respectively; the original one-dimensional array in the X direction and the Y direction and the first-level virtual The sampled values together form a modified one-dimensional array in the X direction and the Y direction;

The actual coordinates of the touched point of the edge region are calculated according to the corrected one-dimensional array of the X direction and the Y direction, and the touch operation of the user is responded to at the position of the actual coordinate.

Further, the step of calculating the first-level virtual sample values located outside the edge region according to the three values of the outermost edges of the original one-dimensional array in the X direction and the Y direction respectively includes:

Let D be the first-level virtual sample value, then D is obtained according to the following formula:

_{D =} flx(Dl ₊ D2) _ _{fd2 x (D 2} _ _{D 1)} . where fl is the preset tensile strength coefficient and fd2 is the preset curve correction coefficient;

Let the value of the most edged column/row in the original one-dimensional array in the X direction/Y direction be C, B, A is the value of the nearest neighboring column/row in the direction of the central area of the touch screen, then D1 The first extended sample value obtained by extending the line segment between the column/row of B and C to the outside by a preset multiple; and the second extended sample value D2 is obtained by the following method:

Extending the predetermined multiple from the line segment between the columns/rows of the A and B to obtain a virtual value B, wherein the virtual value B and the line segment between the column/row of the C extend outward. The second extended sample value D2 is obtained after the preset multiple. Further, before the step of calculating the actual coordinates of the edge region touched by the corrected one-dimensional array in the X direction and the Y direction, the method further includes the following steps:

Further obtaining two-level virtual sample values located outside the first-order virtual sample values according to two values of the edge of the original one-dimensional array and the first-level virtual sample values in the X direction and the Y direction; the X direction and the Y direction The original one-dimensional array of directions and the first-order virtual sample value and the second-order virtual sample value together form a one-dimensional array of the positive direction in the X direction and the Y direction.

A second technical problem to be solved by the present invention is to provide a system for responding to a user's touch operation in an edge region of a touch screen, including:

The original one-dimensional array conversion module is configured to convert two-dimensional matrix sampling data on the touch screen into two original one-dimensional arrays in the X direction and the Y direction; wherein each value in the original one-dimensional array in the X direction is respectively sampled by each column The data is summed, and the values in the original one-dimensional array in the Y direction are summed by the sampled data of each row;

a first-level virtual sample value calculation module, configured to calculate a first-level virtual sample value located outside the edge region according to three values of the outermost edge of the original one-dimensional array in the X direction and the Y direction, respectively; the X direction and the Y direction The original one-dimensional array and the first-order virtual sample values together form a modified one-dimensional array in the X direction and the Y direction;

And a touch operation response module, configured to calculate actual coordinates of the touched area of the edge area according to the corrected one-dimensional array of the X direction and the Y direction, and respond to the user's touch operation at the position of the actual coordinate.

Further, the first-level virtual sample value calculation module obtains a first-level virtual sample value according to the following formula:

_{D =} flx(Dl ₊ D2) _ _{fd2 x (D 2} _ _{D 1)} . where D is the first-order virtual sample value, fl is the preset stretch velocity coefficient, and fd2 is the preset curve correction coefficient;

Let the value of the most edged column/row in the original one-dimensional array in the X direction/Y direction be C, B, A is the value of the nearest neighboring column/row in the direction of the central area of the touch screen, then D1 For B and C The extended sampled value D2 is obtained by the following method: a virtual value B, the virtual value B, and a line segment between the column/row of C is extended outward by the predetermined multiple to obtain a second extended sample value D2.

Further, the system further includes: a second-level virtual sample value calculation module, configured to obtain, according to the two values of the outermost edge of the original one-dimensional array in the X direction and the Y direction, and the first-level virtual sample value, a second-level virtual sample value outside the level virtual sample value; the original one-dimensional array in the X direction and the Y direction and the first-level virtual sample value and the second-level virtual sample value together form a corrected one in the X direction and the Y direction Dimension array.

A third technical problem to be solved by the present invention is to provide a touch screen terminal comprising a system in which a touch screen edge area as described above is responsive to a user's touch operation.

The invention first converts two-dimensional matrix sampling data on the touch screen into two original one-dimensional arrays in the X direction and the Y direction, and then calculates a virtual sample value of the one-dimensional array outside the edge to supplement and correct the one-dimensional array. The calculation method of the coordinates of the touched area of the edge area is the same as the calculation method of the touched point coordinates of the central area, so that the linearity of the touched point of the central area can be maintained, and the touch operation for the edge area can be truly restored. . DRAWINGS

1 is a schematic diagram of calculating coordinates of a touched point provided by the prior art;

2 is a linear effect diagram of the method for calculating the touched point coordinates shown in FIG. 1; FIG. 3 is a flow chart showing the implementation of the method for responding to the user's touch operation by the touch screen edge region provided by the present invention;

4A and FIG. 4B are diagrams of two-dimensional matrix sampling data on a touch screen provided by the present invention; FIG. 5 is a schematic diagram of calculating a first-level virtual sampling value according to the method shown in FIG. 3;

Figure 6, Figure 7, Figure 8 are the different tensile strength coefficients and curve corrections provided by the present invention. Schematic diagram of the touch operation curve obtained by the coefficient;

9A, 9B, and 9C are respectively a graph of a one-dimensional array when fl is a different value;

10 is a schematic structural diagram of a system for responding to a user's touch operation in an edge region of a touch screen provided by the present invention;

Figure 11 is a block diagram showing the structure of another touch screen edge area of the system of Figure 10 in response to user touch operations. detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The coordinate calculation of the touched point in the present invention starts from the whole of the touch screen matrix, first converts the two-dimensional matrix sampling data on the touch screen into two original one-dimensional arrays in the X direction and the Y direction, and then calculates the one-dimensional array on the outer side of the edge. The virtual sampling value is used to supplement the one-dimensional array, so that the calculation method of the edge area touched point coordinates is the same as the calculation method of the touched point coordinates of the central area.

FIG. 3 shows an implementation flow of a method for responding to a user's touch operation in a touch screen edge region provided by the present invention, which is described in detail as follows:

In step S301, the two-dimensional matrix sample data on the touch screen is converted into two original one-dimensional arrays in the X direction and the Y direction.

The values in the original one-dimensional array in the X direction are respectively summed by the sampling data of each column, and the values in the original one-dimensional array in the Y direction are summed by the sampling data of each row. The data in the following table is an example:

The data of each column is accumulated to form an X-direction one-dimensional array. As shown in Fig. 4A, the data of each row is accumulated to form a Y-direction one-dimensional array, as shown in Fig. 4B.

In step S302, the first-order virtual sample values located outside the edge region are calculated based on the three values of the outermost edges of the original one-dimensional array in the X direction and the Y direction, respectively.

Referring to FIG. 5, C is a value corresponding to the most edged column/row in the original one-dimensional array in the X direction/Y direction, and B and A are values corresponding to the nearest neighboring column/row in the direction of the central area of the touch screen. , D1 is B

Sample value D2. According to the relationship of the above values, assuming that the preset multiple is 1 time, the coordinates between the points have the following relationship:

D1=2XC-B;

C, = 2XB-A;

B, =C,;

D2=2 X C- B, =2 X C- (2 X B- A); D1+D2

D= The coefficient of the algorithm is: D = ^flx(D ₂ ^1+D2) fd2 X (D2 Dl), where fl is the preset tensile strength coefficient, fd2 is the preset curve correction coefficient, and the screen is The specific response characteristics are related. For different screens, the data of the finger press response is different. Some can form a 6 x 6 response area, and some have only a 3 x 3 response area. The two parameters are to adapt to different screen response characteristics. The more the capacitive screen data response, the smaller the fl value is. In order to apply the characteristics of the capacitive screen, fd2 is used to adjust the ratio of D1 and D2 when calculating D, so that D can adapt to the data response characteristics of different screens.

It is not difficult to understand that the original one-dimensional array in the X and Y directions and the first-order virtual sample values together form a one-dimensional array of the positive direction in the X and Y directions.

Further, considering that some screens have a relatively large response area to the finger, for example, a point is touched, and up to 6 x 6, it is necessary to further have a second-level virtual sample value to participate in the operation, according to the original direction of the X direction and the Y direction. The two values of the edge of the dimension array and the first-level virtual sample value are used to obtain the second-level virtual sample value outside the first-level virtual sample value. For example, if the second-level virtual sample value is defined as E, it needs to be according to the above B and C. , D calculation, the specific calculation principle is as above, get:

E = ^flx(E ₂ ^1+E2) fe2 x (E2 El) , fe2 is the curve 爹 positive coefficient, fl is the same as above. At this time, the original one-dimensional array in the X direction and the Y direction and the first-order virtual sample value and the second-order virtual sample value together constitute a one-dimensional array of the positive direction in the X direction and the Y direction.

By substituting the two points D and E calculated in the above two equations into the gravity center algorithm formula, the coordinates between 0-pitch/2 can be calculated, where pitch is the center distance of the adjacent sensing line or driving line.

The action of the three coefficients fl, fd2, fe2 will be described below with reference to Fig. 6, Fig. 7, Fig. 8, Fig. 9A, Fig. 9B, Fig. 9C. In Fig. 6-8, the curve line marked with the box "port" is not Stretching track, the curve marked with the cross "X" is the trajectory calculated by the two points D and E. The curve line marked with the vertical line "I" is the trajectory calculated by the virtual 0 and E points. The larger the fl is The greater the stretching strength, fd2 is to adjust the linearity of the pitch where B is located, and fe2 is to adjust the linearity of the pitch where C is located, corresponding to the coefficients of A, B, and C in the previous calculation formula. In Fig. 6, fl=5, fd2=16, fe2=16, in Fig. 7, fl=ll, fd2=16, fe2=16, in Fig. 8, fl=18, fd2=16, fe2=16, The fl in Fig. 9A, Fig. 9B, and Fig. 9C are 31, 19, respectively. 27. For a touch screen, a set of coefficients can be found for this screen to achieve optimal linearity for edge stretching.

In step S303, the actual coordinates of the touched area of the edge region are calculated based on the corrected one-dimensional array of the X direction and the Y direction, and the touch operation of the user is responded to at the position of the actual coordinate.

Let the values in the modified one-dimensional X array be X0, Xl....Xn, respectively, and the number of columns is 0, 1st, ..., nth column, and set the modified 1D Y array. The respective values are Y0, YL... Υη, where the number of columns is 0, 1st, ..., mth, respectively, and the X coordinate of the touched point to be responded is calculated by the following formula:

_ 0χΧ0+1χΧ1 +····+ηχΧη

_ Χ0+Χ1 + ···+Χη '

The coordinates of the touched point to be responded are calculated by the following formula:

γ _ OxYO+lxYl+"-+mxYm

― X0+Yl+--+Ym.

It will be understood by those skilled in the art that all or part of the steps of the foregoing embodiments may be implemented by a program to instruct related hardware, and the program may be stored in the same.

A computer such as a ROM/RAM, a disk, or an optical disk can be read in a storage medium.

Fig. 10 shows the logic principle of the system for responding to user touch operations of the touch screen edge region provided by the present invention. For the convenience of description, only the portions related to the embodiment of the present invention are shown. All or part of the modules in this system may be software units built into the driver IC of the touch screen terminal.

Referring to FIG. 10, the system includes an original one-dimensional array conversion module 101, a first-order virtual sample value calculation module 102, and a touch operation response module 103. The original one-dimensional array conversion module 101 is configured to convert the two-dimensional matrix sampling data on the touch screen into two original one-dimensional arrays in the X direction and the Y direction. As described above, each of the original one-dimensional arrays in the X direction The values are respectively summed by the sampling data of each column, and each value in the original one-dimensional array in the Y direction is composed of the summation of the sampling data of each row. The first-order virtual sampled value calculation module 102 calculates the first-order virtual sample values located outside the edge region according to the three values of the outermost edges of the original one-dimensional array in the X direction and the Y direction, respectively, as described above, the original in the X direction and the Y direction. The one-dimensional array and the first-order virtual sample values together form a modified one-dimensional array in the X direction and the Y direction.

Then the touch operation response module 103 calculates the corrected one-dimensional array according to the X direction and the Y direction. The edge area is touched by the actual coordinates of the touched point and in response to the user's touch operation at the actual coordinate position.

Further, the first-level virtual sampled value calculation module 102 obtains the first-level virtual sampled value according to the following formula:

_{D =} flx(Dl _+D2 ) _ _{fd2 x (D 2} _ _{D 1) ;} where D is the first-order virtual sample value, fl is the preset stretch velocity coefficient, and fd2 is the preset curve correction coefficient; The value of the most edged column/row in the original one-dimensional array in the direction/Y direction is C, B, A is the value of the nearest neighboring column/row in the direction of the central area of the touch screen, then D1 is B. The first extended sample value obtained by extending the line segment between the column/row of C to the outside by a preset multiple; and the second extended sample value D2 is obtained by the following method: A line segment between the column/row of A and B Extending the preset multiple to the outside to obtain a virtual value B, the virtual value B, and the line segment between the column/row of C is extended to the outside by a preset multiple to obtain a second extended sample value D2.

Further, as shown in FIG. 11, the system further includes a two-level virtual sample value calculation module 104, configured to obtain two values of the edge of the original one-dimensional array and the first-level virtual sample values according to the X direction and the Y direction. The second-order virtual sample value located outside the first-order virtual sample value; the original one-dimensional array in the X direction and the Y direction and the first-order virtual sample value and the second-level virtual sample value together constitute a corrected one-dimensional array in the X direction and the Y direction .

The principles of the first-level virtual sampled value calculation module 102 and the second-level virtual sampled value calculation module 104 are as described above, and are not described herein again.

The invention first converts two-dimensional matrix sampling data on the touch screen into two original one-dimensional arrays in the X direction and the Y direction, and then calculates a virtual sample value of the one-dimensional array outside the edge to supplement and correct the one-dimensional array. The calculation method of the coordinates of the touched area of the edge area is the same as the calculation method of the touched point coordinates of the central area, so that the linearity of the touched point of the central area can be maintained, and the touch operation for the edge area can be truly restored. .

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.

Claims

claims

1. A method for responding to user touch operations in the edge area of a touch screen, characterized by including the following steps:

Convert the two-dimensional matrix sampling data on the touch screen into two original one-dimensional arrays in the X direction and Y direction; where each value in the original one-dimensional array in the Each value in the one-dimensional array is composed of the sum of the sampled data of each row;

Calculate the first-level virtual sampling value located outside the edge area according to the three edge values of the original one-dimensional arrays in the X direction and Y direction respectively; the original one-dimensional arrays in the X direction and Y direction and the first-level virtual The sampled values together form a modified one-dimensional array in the X and Y directions;

Calculate the actual coordinates of the touched point in the edge area based on the corrected one-dimensional array in the X direction and the Y direction, and respond to the user's touch operation at the location of the actual coordinates.

2. The method according to claim 1, characterized in that, the step of calculating the first-level virtual sampling value located outside the edge area based on the three edgemost values of the original one-dimensional array in the X direction and Y direction respectively. include:

Suppose D is the first-level virtual sampling value, then D is obtained according to the following formula:

_{D =} flx(Dl ₊ D2) _ _{fd2 x (D 2} _ _{D 1)} . Among them, fl is the preset tensile strength coefficient, fd2 is the preset curve correction coefficient;

Assume that the values corresponding to the most edge columns/rows in the original one-dimensional array in the X direction/Y direction are C, B, and A, and are the values corresponding to the nearest and next adjacent columns/rows in the direction of the central area of the touch screen, then D1 It is the first extended sample value obtained after the line segment between the columns/rows of B and C is extended outward by a preset multiple; and the second extended sample value D2 is obtained by the following method:

A virtual value B is obtained by extending the line segment between the column/row of A and B outward by the preset multiple, and the line segment between the virtual value B and the column/row of C extends outward. The second extended sample value D2 is obtained after the preset multiple.

3. The method according to claim 2, characterized in that, according to the X direction and the Y direction Before the step of calculating the actual coordinates of the touched point in the edge area using the modified one-dimensional array, the method further includes the following steps:

Further, based on the two edge values of the original one-dimensional array in the X direction and the Y direction and the first-level virtual sampling value, a second-level virtual sampling value located outside the first-level virtual sampling value is obtained; the X direction and the Y direction The original one-dimensional array in the direction, the first-level virtual sampling value, and the second-level virtual sampling value together constitute a positive one-dimensional array in the X direction and the Y direction.

4. A system for responding to user touch operations in the edge area of a touch screen, characterized by including: an original one-dimensional array conversion module, used to convert the two-dimensional matrix sampling data on the touch screen into two original one-dimensional arrays in the X direction and the Y direction. Dimensional array; each value in the original one-dimensional array in the X direction is composed of the sum of the sampled data of each column, and each value in the original one-dimensional array in the Y direction is composed of the sum of the sampled data of each row;

A first-level virtual sampling value calculation module, used to calculate the first-level virtual sampling value located outside the edge area based on the three edge values of the original one-dimensional array in the X direction and Y direction respectively; The original one-dimensional array and the first-level virtual sampling value together constitute the modified one-dimensional array in the X direction and the Y direction;

A touch operation response module, configured to calculate the actual coordinates of the touched point in the edge area based on the corrected one-dimensional array in the X direction and the Y direction, and respond to the user's touch operation at the location of the actual coordinates.

5. The system of claim 4, wherein the first-level virtual sampling value calculation module obtains the first-level virtual sampling value according to the following formula:

_{D =} flx(Dl ₊ D2) _ _{fd2 x (D 2} _ _{D 1)} . Among them, D is the first-level virtual sampling value, fl is the preset tensile strength coefficient, and fd2 is the preset curve correction coefficient;

Assume that the values corresponding to the most edge columns/rows in the original one-dimensional array in the X direction/Y direction are C, B, and A, and are the values corresponding to the nearest and next adjacent columns/rows in the direction of the central area of the touch screen, then D1 is the first extended sample value obtained after the line segment between the columns/rows of B and C is extended outward by a preset multiple; and the second The extended sampling value D2 is obtained by the following method: the line segment between the virtual value B,, the virtual value B, and the column/row where C is extended outward by the preset multiple to obtain the second extended sampling value D2.

6. The system of claim 5, wherein the system further includes:

A second-level virtual sample value calculation module is used to obtain a second-level virtual sample value located outside the first-level virtual sample value based on the two edge values of the original one-dimensional array in the X direction and the Y direction and the first-level virtual sample value. Sampling values; The original one-dimensional arrays in the X direction and the Y direction and the first-level virtual sampling values and the second-level virtual sampling values together constitute the modified one-dimensional arrays in the X and Y directions.

7. A touch screen terminal, characterized in that it includes a system for responding to a user's touch operation in the edge area of the touch screen according to any one of claims 4 to 6.