TWI400644B - Method of adjusting touch point - Google Patents

Description

Contact point correction method

The present disclosure is directed to a method of correction, and more particularly to a method of contact point correction.

The touch panel is an inductive device that can receive input signals such as a finger or a glue tip. When the graphic button on the panel is touched, the tactile feedback system on the panel can drive various links according to a pre-programmed program. A device that can be used to replace a mechanical button.

Touch panels are used in a wide variety of applications, from common PDAs, cash machines, to industrial touch computers, to an intimate and vivid human-machine interface. However, the capacitive touch panel has a limited number of sensors, so measuring at different locations has different energy distributions, causing different degrees of error, and it is difficult to directly find a precise touch point. position.

It can be seen that the above-mentioned prior art obviously has inconveniences and defects, and needs to be further improved. In order to solve the above problems, the relevant fields have not exhausted their efforts to seek solutions, but the methods that have not been applied for a long time have been developed. Therefore, how to calculate the contact point position more accurately is one of the current important research and development topics, and it has become an urgent target for improvement in related fields.

Accordingly, one aspect of the present disclosure is to provide a contact point correction method for improving the accuracy of calculating the position of a contact point.

According to an embodiment of the present disclosure, a touch point correction method includes the following steps:

(a) obtaining a raw material in a first direction and a raw material in a second direction from a capacitive touch screen;

(b) analyzing the first energy distribution of the at least one contact point along the first direction based on the original data in the first direction to establish a first energy distribution lookup table, wherein the first energy distribution lookup table is recorded in the first direction The relationship between the coordinates and the first energy distribution;

(c) analyzing a second energy distribution of the contact point along the second direction based on the original data in the second direction, thereby establishing a second energy distribution lookup table, wherein the second energy distribution lookup table records the coordinates in the second direction The relationship of the second energy distribution;

(d) calculating a first energy compensation of the contact point along the first direction based on the original data in the second direction, thereby establishing a first energy compensation lookup table, wherein the first energy compensation lookup table records the coordinates in the second direction The relationship of the first energy compensation;

(e) calculating a second energy compensation of the contact point along the second direction based on the original data in the first direction, thereby establishing a second energy compensation lookup table, wherein the second energy compensation lookup table records the coordinates in the first direction The relationship of the second energy compensation;

(f) comparing the first energy distribution lookup table and the second energy compensation lookup table to find a second energy compensation corresponding to the first energy distribution in the first direction, and then correcting the second energy compensation based on the corresponding second energy compensation a second energy distribution to calculate a position of the contact point in the second direction;

(g) comparing the second energy distribution lookup table with the first energy compensation lookup table to find a first energy compensation corresponding to the second energy distribution in the second direction, and then correcting the first based on the corresponding first energy compensation The energy distribution is used to calculate the position of the contact point in the first direction.

In this embodiment, the first direction is a horizontal direction and the second direction is a vertical direction. In practice, a capacitive touch screen can include a plurality of capacitive sensors arranged in an array. In the step (b), the energy value M _d1 sensed by any of the capacitive sensors and the energy values L _d1 , R _d1 sensed by the capacitive sensors on both sides in the horizontal direction can be obtained from the original data in the horizontal direction. The first energy distribution Eng _d1 in the horizontal direction is calculated, wherein the first energy distribution Eng _d1 satisfies the following relationship:

When L _d1 >R _d1 , Eng _d1 =(L _d1 -R _d1 )/(M _d1 -R _d1 )

When R _d1 > L _d1 , Eng _d1 = (R _{d1 -} L _d1 ) / (M _{d1 -} R _d1 )

In the step (c), the energy value M _d2 sensed by any of the capacitive sensors and the energy values U _d2 , D sensed by the second capacitive sensors on both sides in the vertical direction can be obtained from the original data in the vertical direction. _D2 , according to which the second energy distribution Eng _d2 in the vertical direction is calculated, wherein the second energy distribution Eng _d2 satisfies the following relationship:

When U _d2 > D _d2 , Eng _d2 = (U _{d2 -} D _d2 ) / (M _{d2 -} D _d2 )

When D _d2 >U _d2 , Eng _d2 =(D _d2 -U _d2 )/(M _d2 -U _d2 )

In the step (d), the energy value M _c1 sensed by any of the capacitive sensors and the energy values L _c1 and R _c1 sensed by the capacitive sensors on both sides in the horizontal direction can be obtained from the original data in the vertical direction. The first energy compensation Eng _{c1 is} calculated, wherein the first energy compensation Eng _c1 satisfies the following relationship:

When L _c1 >R _c1 , Eng _c1 =(L _c1 -R _c1 )/(M _c1 -R _c1 )

When R _c1 >L _c1 , Eng _c1 =(R _c1 -L _c1 )/(M _c1 -R _c1 )

In the step (g), the first energy compensation corresponding to the second energy distribution in the second direction at U _d2 >D _d2 is searched, and the first energy distribution Eng _{d1 is} subtracted from the corresponding first energy compensation Eng. _C1 obtains the corrected first energy distribution; similarly, it can also find the first energy compensation corresponding to the second energy distribution in the second direction at D _d2 >U _d2 , and then subtract the first energy distribution Eng _d1 Corresponding first energy compensation Eng _c1 obtains a corrected first energy distribution.

In the step (e), the energy value M _c2 sensed by any of the capacitive sensors and the energy values U _c2 , D sensed by the second capacitive sensors on both sides in the vertical direction can be obtained from the original data in the horizontal direction. _C2 , according to which the second energy compensation Eng _{c2 is} calculated, wherein the second energy compensation Eng _c2 satisfies the following relationship:

When U _c2 >D _c2 , Eng _c2 =(U _c2 -D _c2 )/(M _c2 -D _c2 )

When D _c2 >U _c2 , Eng _c2 =(D _c2 -U _c2 )/(M _c2 -U _c2 )

In the step (f), the second energy compensation corresponding to the first energy distribution in the first direction at L _d1 >R _d1 may be searched, and then the second energy distribution Eng _{d2 is} subtracted from the corresponding second energy compensation Eng. _C2 to obtain the corrected second energy distribution; similarly, the second energy compensation corresponding to the first energy distribution in the first direction at R _d1 > L _d1 may be found, and then the second energy distribution Eng _{d2 is} subtracted Corresponding second energy compensation Eng _c2 to obtain a corrected second energy distribution.

According to another embodiment of the present disclosure, a touch point correction method includes the following steps:

(a) obtaining a first source material and a second source material from a capacitive touch screen;

(b) establishing a relationship between the first coordinate axis and a first energy distribution based on the first source data, the first energy distribution being dependent on an area contacted by the at least one contact point on the capacitive touch screen along the first coordinate axis;

(c) based on the second raw data to establish a relationship between the second coordinate axis and a second energy distribution, the second energy distribution being dependent on the area of contact of the contact point along the second coordinate axis;

(d) based on the second source data to establish a relationship between the second coordinate axis and a first energy compensation;

(e) establishing a relationship between the first coordinate axis and a second energy compensation based on the first source data;

(f) finding a second energy compensation corresponding to the first energy distribution along the first coordinate axis, and correcting the second energy distribution based on the second energy compensation to calculate a position of the contact point on the second coordinate axis;

(g) finding a first energy compensation corresponding to the second energy distribution along the second coordinate axis, and correcting the first energy distribution based on the first energy compensation to calculate a position of the contact point on the first coordinate axis.

In practice, the capacitive touch screen may include a plurality of capacitive sensors arranged in an array in a horizontal direction and a vertical direction, the first original data represents the original data in the horizontal direction, and the second original data represents the original data in the vertical direction, the first coordinate axis The coordinate axis is along the horizontal direction, and the second coordinate axis is along the coordinate axis of the vertical direction.

In the step (b), the energy value M _d1 sensed by any of the capacitive sensors and the energy values L _d1 , R _d1 sensed by the capacitive sensors on both sides in the horizontal direction can be obtained from the original data in the horizontal direction. According to the calculation of the first energy distribution Eng _a in the horizontal direction, wherein the first energy distribution Eng _d1 satisfies the following relationship:

When L _d1 >R _d1 , Eng _d1 =(L _d1 -R _d1 )/(M _d1 -R _d1 )

When R _d1 > L _d1 , Eng _d1 = (R _{d1 -} L _d1 ) / (M _{d1 -} R _d1 )

In the step (c), the energy value U _d2 , D sensed by the second capacitive sensor of any capacitive sensor along the sensed energy value M _d2 and the two sides of the vertical direction thereof can be obtained from the original data in the vertical direction. _D2 , according to which the second energy distribution Eng _d2 in the vertical direction is calculated, wherein the second energy distribution Eng _d2 satisfies the following relationship:

When U _d2 > D _d2 , Eng _d2 = (U _{d2 -} D _d2 ) / (M _{d2 -} Dd ₂ )

When D _d2 >U _d2 , Eng _d2 =(D _d2 -U _d2 )/(M _d2 -U _d2 )

In summary, the touch position correction method of the present disclosure has obvious advantages and advantageous effects compared with the prior art. With the above technical solution, the problem of different energy distribution errors can be effectively corrected through the linear compensation mechanism, thereby calculating a more accurate contact point.

In order to make the description of the present disclosure more complete and complete, reference is made to the accompanying drawings and the accompanying drawings. On the other hand, well-known elements and steps are not described in the embodiments to avoid unnecessarily limiting the invention.

1 is a flow chart of a touch point correction method 100 in accordance with an embodiment of the present disclosure. As shown in FIG. 1 , the touch position correction method 100 includes steps 110 to 170 (it should be understood that the steps mentioned in the embodiment can be adjusted according to actual needs unless otherwise specified. The order is sequential, and can even be performed simultaneously or partially simultaneously).

In step 110, the original data in the first direction and the original data in the second direction are obtained from the capacitive touch screen. The first direction may be a horizontal direction, and the second direction may be a vertical direction; or the first direction may be a vertical direction, and the second direction may be a horizontal direction. The original data is the data sensed by the capacitive sensor of the touch screen, and the processed data can reflect the position of the initial sensing contact point, the contact area and the like.

In step 120, the first energy distribution of the contact point along the first direction may be analyzed based on the original data of the first direction; and the second energy distribution of the contact point along the second direction may be analyzed based on the original data of the second direction. The first energy distribution depends on the area, orientation, and the like of the contact point on the capacitive touch screen along the first coordinate axis, wherein the first coordinate axis is a coordinate along the first direction; likewise, the second energy distribution depends on The contact area on the capacitive touch screen is in contact with the area, the orientation, and the like along the second coordinate axis, wherein the second coordinate axis is a coordinate along the second direction.

In step 130, a first energy distribution lookup table may be established. The first energy distribution lookup table records the relationship between the coordinates in the first direction and the first energy distribution; another second energy distribution lookup table may be established, and the second The energy distribution lookup table records the relationship between the coordinates in the second direction and the second energy distribution.

Although the approximate position of the contact point can be calculated by the relationship between the energy distribution and the coordinates described above, due to the limitation of the number and size of the capacitive sensors, different energy distributions may be measured at different positions, resulting in different degrees. The error is difficult to find the exact location of the contact point directly. In view of this, the next steps 140-170 will use a linear compensation mechanism to correct the error and calculate the exact contact point position.

In step 140, the original data in the first direction and the original data in the second direction are obtained from the capacitive touch screen. In step 150, the first energy compensation of the contact point along the first direction may be calculated based on the original data of the second direction; and the second energy compensation of the contact point along the second direction may be calculated based on the original data of the first direction. In step 160, a first energy compensation lookup table may be established, the first energy compensation lookup table records the relationship between the coordinates in the second direction and the first energy compensation; and a second energy compensation lookup table, the second energy may be established. The compensation lookup table records the relationship between the coordinates in the first direction and the second energy compensation.

In step 170, the first energy distribution lookup table and the second energy compensation lookup table may be compared to find a second energy compensation corresponding to the first energy distribution in the first direction, and then based on the corresponding second energy compensation. Correcting the second energy distribution to calculate a position corresponding to the contact point in the second direction; and comparing the second energy distribution lookup table with the first energy compensation lookup table to find the second energy distribution corresponding to the second direction The first energy compensation further corrects the first energy distribution based on the corresponding first energy compensation to calculate a position of the contact point in the first direction. Thereby, step 170 corrects the error in a cross-alignment manner to calculate a more accurate contact point position.

In order to make the technique of the touch point correction method 100 more clear and understandable, the above description will be described in detail with reference to the embodiments, and further explanation of the technical solutions of the present disclosure is provided.

Referring to Fig. 2, Fig. 2 is a graph for performing steps 110, 120 of Fig. 1 to calculate a first energy distribution. As shown in FIG. 2, the capacitive touch screen 200 may include a plurality of capacitive sensors arranged in an array, and the contact points pass through a plurality of capacitive sensors Pad#1, Pad#2, Pad along a horizontal direction D _irh . #3... (not shown on the touch screen 200), the touch screen 200 represents one of the capacitive sensors with M, and represents the capacitive sensors on the left and right sides of the M by L and R.

In step 110, the energy value M _d1 sensed by any of the capacitive sensors M and the energy values L sensed by the capacitive sensors L and R on both sides in the horizontal direction can be obtained from the original data in the horizontal direction D _irh . _D1 , R _d1 . The original data of the horizontal direction D _irh in step 110 records the relationship of the raw counts (Raw counts) of the respective capacitive sensors Pad#1, Pad#2, Pad#3... to the information frame. In step 120, a first horizontal direction _D irh energy distribution of original data is calculated according Eng _{d1 D} irh the horizontal direction. In this embodiment, the first energy distribution Eng _d1 is a horizontal energy distribution Eng _d1 , which satisfies the following relationship:

When L _d1 >R _d1 , Eng _d1 =(L _d1 -R _d1 )/(M _d1 -R _d1 )

When R _d1 > L _d1 , Eng _d1 = (R _{d1 -} L _d1 ) / (M _{d1 -} R _d1 )

Thereby, as shown in FIG. 2, in step 120, the relationship of the information frame corresponding to the percentage of the horizontal direction energy distribution Eng _d1 can be calculated.

Next, referring to Fig. 3, Fig. 3 is a first energy distribution lookup table LUT _d1 (i.e., horizontal energy distribution lookup table LUT _d1 ) established by performing step 130 of Fig. 1. As shown in Fig. 3, the horizontal direction energy distribution lookup table LUT _d1 records the relationship between the coordinates in the horizontal direction and the horizontal direction energy distribution Eng _d1 .

On the other hand, referring to Fig. 4, Fig. 4 is a graph for performing steps 110 and 120 of Fig. 1 to calculate a second energy distribution. As shown in FIG. 4, the trajectory of the contact point along a vertical direction D _irv passes through a plurality of capacitive sensors Pad#1, Pad#2, Pad#3... (not shown on the touch screen 200), and the touch On the screen 200, M represents one of these capacitive sensors, and U and D represent capacitance sensors on the upper and lower sides of M.

In step 110, the raw data may be in a vertical direction D _irv made of any of a capacitive sensor sensed the M energy values _D2 and M along the vertical direction on both sides of the D _irv second capacitive sensor U, D of the sensed Energy values U _d2 , D _d2 . The original data of the vertical direction D _irv in step 110 records the _relationship of the raw _counts of the respective capacitive sensors Pad#1, Pad#2, Pad#3... to the information frame. In step 120, the second energy distribution Eng _d2 in the vertical direction is calculated from the original data of the vertical direction D _irv . In this embodiment, the second energy distribution Eng _d2 is a vertical direction energy distribution Eng _d2 , which satisfies the following relationship:

When U _d2 > D _d2 , Eng _d2 = (U _{d2 -} D _d2 ) / (M _{d2 -} D _d2 )

When D _d2 >U _d2 , Eng _d2 =(D _d2 -U _d2 )/(M _d2 -U _d2 )

Thereby, as shown in FIG. 4, in step 120, the relationship of the information frame corresponding to the percentage of the vertical direction energy distribution Eng _d2 can be calculated.

Next, referring to Fig. 5, Fig. 5 is a second energy distribution lookup table LUT _d2 (i.e., vertical energy distribution lookup table LUT _d2 ) established by performing step 130 of Fig. 1. As shown in Fig. 5, the vertical direction energy distribution lookup table LUT _d2 records the relationship between the coordinates in the vertical direction and the vertical direction energy distribution Eng _d2 .

The mechanism of linear compensation will be described below in Figures 6-10. Referring to Figure 6, Figure 6 is a chart for performing the steps 140, 150 of Figure 1 to calculate the first energy compensation. As shown in FIG. 6, the contact point passes along a vertical direction D _irv through a plurality of capacitive sensors Pad#1, Pad#2, Pad#3... (not shown on the touch screen 200), and the touch On the screen 200, M represents one of these capacitive sensors, and L and R represent capacitance sensors on the left and right sides of M.

In step 130, the energy value M _c1 sensed by any of the capacitive sensors M and the energy values _sensed by the capacitive inductors L and R on both sides of the horizontal direction D _irh can be obtained from the original data in the vertical direction D _irv . L _c1 , R _c1 . The original data of the vertical direction D _irv in step 130 records the _relationship of the raw _counts of the respective capacitive sensors Pad#1, Pad#2, Pad#3... to the information frame. In step 140, an energy value M _c1, L _c1, R _c1 calculates a first energy compensation Eng _c1. In this embodiment, the first energy compensation Eng _c1 is a horizontal direction energy compensation Eng _c1 , which satisfies the following relationship:

When L _c1 >R _c1 , Eng _c1 =(L _c1 -R _c1 )/(M _c1 -R _c1 )

When R _c1 >L _c1 , Eng _c1 =(R _c1 -L _c1 )/(M _c1 -R _c1 )

Thereby, as shown in FIG. 6, in step 150, the relationship of the information frame corresponding to the horizontal energy compensation Eng _c1 percentage can be calculated. Due to the limited number and size of the capacitive sensors, the horizontal energy compensation Eng _{c1 is} actually a jagged line segment 300h, which cannot be ideally presented as a smooth straight line 300i.

Next, referring to Fig. 7, Fig. 7 is a first energy compensation lookup table LUT _c1 (i.e., horizontal energy compensation lookup table LUT _c1 ) established by performing step 160 of Fig. 1. As shown in Fig. 7, the horizontal energy compensation lookup table LUT _c1 records the relationship between the coordinates in the vertical direction and the horizontal energy compensation Eng _c1 .

On the other hand, referring to Fig. 8, Fig. 8 is a graph for performing the steps 140, 150 of Fig. 1 to calculate the second energy compensation. As shown in FIG. 8, the track along the horizontal direction D _irh passes through a plurality of capacitive sensors Pad#1, Pad#2, Pad#3... (not shown on the touch screen 200), and the touch On the screen 200, M represents one of these capacitive sensors, and U and D represent capacitance sensors on the upper and lower sides of M.

In step 130, the energy value M _c2 sensed by any of the capacitive sensors M and its _sensed by the second capacitive sensors U, D on both sides of the vertical direction D _irv can be obtained from the original data in the horizontal direction D _irh . Energy values U _c2 , D _c2 . The original data of the horizontal direction D _irh in step 130 records the relationship of the information boxes corresponding to the raw counts of the respective capacitive sensors Pad#1, Pad#2, Pad#3.... In step 140, an energy value M _c2, U _c2, D _c2 calculates a second energy compensating Eng _c2. In this embodiment, the second energy compensation Eng _c2 is a vertical energy compensation Eng _c2 that satisfies the following relationship:

When U _c2 >D _c2 , Eng _c2 =(U _c2 -D _c2 )/(M _c2 -D _c2 )

When D _c2 >U _c2 , Eng _c2 =(D _c2 -U _c2 )/(M _c2 -U _c2 )

Thereby, as shown in FIG. 8, in step 150, the relationship of the information frame corresponding to the vertical direction energy compensation Eng _c2 percentage can be calculated. Due to the limited number and size of capacitive sensors, the vertical direction energy compensation Eng _{c2 is} actually a jagged line segment 310v, which cannot be ideally presented as a smooth line segment 310i.

Next, referring to FIG. 9, FIG. 9 is a second energy compensation lookup table LUT _c2 (ie, the vertical direction energy compensation lookup table LUT _c2 ) established by the step 160 of FIG. As shown in Fig. 9, the vertical direction energy compensation lookup table LUT _c2 records the relationship between the coordinates in the horizontal direction and the vertical direction energy compensation Eng _c2 .

Referring to Fig. 10, Fig. 10 is a schematic diagram showing the execution of step 170 of Fig. 1. As shown in FIG. 10, the horizontal direction energy distribution lookup table LUT _{d1 is} compared with the vertical direction energy compensation lookup table LUT _c2 ; and the vertical direction energy distribution lookup table LUT _{d2 is} compared with the horizontal direction energy compensation lookup table LUT _c1 .

For example, if the horizontal energy distribution of the initial measurement of the contact point is 38%, the energy distribution in the vertical direction is 60%. In step 170, if the vertical energy distribution is to be corrected, the horizontal energy distribution lookup table LUT _d1 and the vertical energy compensation lookup table LUT _{c2 may} be compared to find that the horizontal energy distribution is 38% in L _d1 >Rd ₁ The vertical energy corresponding to the time is compensated by 1%, and then the vertical energy distribution is 60% minus the vertical energy compensation of 1% to obtain a corrected vertical energy distribution of 59%.

Similarly, the horizontal direction energy distribution lookup table LUT _d1 and the vertical direction energy compensation lookup table LUT _{c2 can} be compared to find that the horizontal direction energy distribution 38% corresponds to the vertical direction energy compensation -4% when R _d1 > L _d1 Then, the vertical energy compensation is reduced by -4% in the vertical direction energy distribution by 60% to obtain a corrected vertical energy distribution of 64%.

In step 170, if the horizontal energy distribution is to be corrected, the vertical energy distribution lookup table LUT _d2 and the horizontal energy compensation lookup table LUT _{c1 may be} compared to find that the vertical energy distribution is 60% at U _d2 >D _d2 The horizontal energy corresponding to the time is compensated by 2%, and then the horizontal energy distribution is reduced by 38% in the horizontal direction to compensate the horizontal energy compensation by 2% to obtain a corrected horizontal direction energy distribution of 36%.

Similarly, the vertical direction energy distribution lookup table LUT _d2 and the horizontal direction energy compensation lookup table LUT _c1 can be compared to find that the above-mentioned vertical direction energy distribution is 60% in the horizontal direction energy compensation corresponding to D _d2 >U _d2 %, then subtracted horizontal energy compensation by 0% from the horizontal energy distribution by 38% to obtain a corrected horizontal direction energy distribution of 38%.

Thereby, after the correction by the above cross comparison, the corrected horizontal and vertical energy distributions can be used to calculate a more accurate contact point position.

The contact point correction method 100 as described above can be implemented by a computer, or part of the function can be implemented as a computer program and stored in a computer readable recording medium, so that the computer reads the recording medium. The touch point correction method 100 is executed by a computer system.

Although the present disclosure has been disclosed in the above embodiments, it is not intended to limit the invention, and the present invention may be modified and retouched without departing from the spirit and scope of the present disclosure. The scope of protection is subject to the definition of the scope of the patent application.

100. . . Touch position correction method

110~170. . . step

200. . . Capacitive touch screen

300h, 300i. . . Line segment

310v, 310i. . . Line segment

D _irh . . . horizontal direction

D _irv . . . Vertical direction

Pad#1, Pad#2, Pad#3. . . Capacitive sensor

M, L, R, U, D. . . Capacitive sensor

M _d1 , L _d1 , R _d1 , M _d2 , U _d2 , D _d2 . . . Energy value

M _c1 , U _c1 , D _c1 , M _c2 , U _c2 , D _c2 . . . Energy value

LUT _d1 . . . Horizontal direction energy distribution lookup table

LUT _d2 . . . Vertical energy distribution lookup table

The above and other objects, features, advantages and embodiments of the present disclosure will become more apparent and understood.

1 is a flow chart of a touch point correction method according to an embodiment of the present disclosure;

Figure 2 is a chart for performing steps 110, 120 of Figure 1 to calculate a first energy distribution;

Figure 3 is a first energy distribution lookup table established by performing step 130 of Figure 1;

Figure 4 is a chart for performing steps 110, 120 of Figure 1 to calculate a second energy distribution;

Figure 5 is a second energy distribution lookup table established by performing step 130 of Figure 1;

Figure 6 is a chart for performing steps 140, 150 of Figure 1 to calculate a first energy compensation;

Figure 7 is a first energy compensation lookup table established by performing step 160 of Figure 1;

Figure 8 is a chart for performing steps 140, 150 of Figure 1 to calculate a second energy compensation;

Figure 9 is a second energy compensation lookup table established by performing step 160 of Figure 1;

Figure 10 is a schematic diagram of the step 170 of performing Figure 1.

100. . . Contact point correction method

110~170. . . step

Claims (14)

A contact point correction method includes at least: (a) obtaining a first direction original data and a second direction original data from a capacitive touch screen; and (b) analyzing at least the original data according to the first direction; a first energy distribution of the contact point along the first direction to establish a first energy distribution lookup table, wherein the first energy distribution lookup table records a relationship between the coordinates in the first direction and the first energy distribution; (c) analyzing a second energy distribution of the contact point along the second direction based on the original data in the second direction, thereby establishing a second energy distribution lookup table, wherein the second energy distribution lookup table records the second a relationship between a coordinate in the direction and the second energy distribution; (d) calculating a first energy compensation of the contact point along the first direction based on the original data of the second direction, thereby establishing a first energy compensation lookup table The first energy compensation lookup table records the relationship between the coordinates in the second direction and the first energy compensation; (e) calculating the second point of the contact point along the second direction based on the original data of the first direction can Compensating, according to which a second energy compensation lookup table is established, wherein the second energy compensation lookup table records the relationship between the coordinates in the first direction and the second energy compensation; (f) the first energy distribution lookup table And the second energy compensation lookup table to find the second energy compensation corresponding to the first energy distribution in the first direction, and then correct the second energy distribution based on the corresponding second energy compensation to calculate a position corresponding to the contact point in the second direction; and (g) comparing the second energy distribution lookup table with the first energy compensation lookup table to find a second energy distribution corresponding to the second direction The first energy compensation further corrects the first energy distribution based on the corresponding first energy compensation to calculate a position of the contact point in the first direction. The contact point correction method of claim 1, wherein the first direction is a horizontal direction and the second direction is a vertical direction. The contact point correction method of claim 2, wherein the capacitive touch screen comprises a plurality of capacitive sensors arranged in an array, and the step (b) comprises: sensing the original data in the horizontal direction by any capacitive sensor The energy value M _d1 and the energy values L _d1 , R _d1 sensed by the capacitive sensors on both sides of the horizontal direction, according to which the first energy distribution Eng _d1 along the horizontal direction is calculated, wherein the first energy The distribution Eng _d1 satisfies the following relationship: when L _d1 >R _d1 , Eng _d1 =(L _d1 -R _d1 )/(M _d1 -R _d1 ) When R _d1 >L _d1 , Eng _d1 =(R _d1 -L _D1 )/(M _d1 -R _d1 ) The contact point correction method of claim 3, wherein the step (c) comprises: obtaining, by the original data in the vertical direction, the energy value M _d2 sensed by any of the capacitive sensors and the two sides along the vertical direction The energy values U _d2 , D _d2 sensed by the two capacitive sensors are used to calculate the second energy distribution Eng _d2 along the vertical direction, wherein the second energy distribution Eng _d2 satisfies the following relationship: when U _d2 >D _d2 When Eng _d2 = (U _{d2 -} D _d2 ) / (M _{d2 -} D _d2 ) When D _d2 > U _d2 , Eng _d2 = (D _d2 - U _d2 ) / (M _d2 - U _d2 ) The contact point correction method of claim 4, wherein the step (d) comprises: obtaining, by the original data in the vertical direction, the energy value M _c1 sensed by any of the capacitance sensors and the capacitance along the two sides of the horizontal direction The first energy compensation Eng _c1 is calculated by the energy values L _c1 and R _c1 sensed by the sensor, wherein the first energy compensation Eng _c1 satisfies the following relationship: when L _c1 >R _c1 , Eng _c1 =(L _{C1 -} R _c1 ) / (M _{c1 -} R _c1 ) When R _c1 > L _c1 , Eng _c1 = (R _{c1 -} L _c1 ) / (M _{c1 -} R _c1 ) The contact point correction method of claim 5, wherein the step (g) comprises: finding the first energy compensation corresponding to the second energy distribution in the second direction at U _d2 > D _d2 , and further An energy distribution Eng _{d1 is} subtracted from the corresponding first energy compensation Eng _c1 to obtain the corrected first energy distribution. The contact point correction method of claim 5, wherein the step (g) comprises: finding the first energy compensation corresponding to the second energy distribution in the second direction at D _d2 > U _d2 , and further An energy distribution Eng _{d1 is} subtracted from the corresponding first energy compensation Eng _c1 to obtain the corrected first energy distribution. The contact point correction method of claim 4, wherein the step (e) comprises: obtaining, by the original data in the horizontal direction, the energy value M _c2 sensed by any of the capacitive sensors and the two sides along the vertical direction The energy values U _c2 and D _c2 sensed by the two capacitive sensors are used to calculate the second energy compensation Eng _c2 , wherein the second energy compensation Eng _{c 2} satisfies the following relationship: when U _c2 > D _c2 , Eng _c2 = (U _c2 -D _c2 )/(M _c2 -D _c2 ) When D _c2 >U _c2 , Eng _c2 =(D _c2 -U _c2 )/(M _c2 -U _c2 ) The contact point correction method of claim 8, wherein the step (f) comprises: searching for the second energy compensation corresponding to the first energy distribution in the first direction at L _d1 > R _d1 , and further The second energy distribution Eng _{d2 is} subtracted from the corresponding second energy compensation Eng _c2 to obtain the corrected second energy distribution. The contact point correction method of claim 8, wherein the step (f) comprises: finding the second energy compensation corresponding to the first energy distribution in the first direction when R _d1 > L _d1 , and further The second energy distribution Eng _{d2 is} subtracted from the corresponding second energy compensation Eng _c2 to obtain the corrected second energy distribution. A contact point correction method includes at least: (a) obtaining a first original data and a second original data from a capacitive touch screen; and (b) establishing a first coordinate axis and a first based on the first original data; An energy distribution relationship, wherein the first energy distribution is dependent on an area contacted by the at least one contact point on the capacitive touch screen along the first coordinate axis; (c) establishing a second based on the second original data a relationship between the coordinate axis and a second energy distribution, the second energy distribution being dependent on an area contacted by the contact point along the second coordinate axis; (d) establishing the second coordinate axis and a first based on the second original data a relationship of energy compensation; (e) establishing a relationship between the first coordinate axis and a second energy compensation based on the first original data; (f) finding the second energy corresponding to the first coordinate axis along the first coordinate axis Energy compensation, and thereby correcting the second energy distribution based on the second energy compensation to calculate a position of the contact point on the second coordinate axis; and (g) finding a second energy distribution corresponding to the second coordinate axis First energy Compensation, based on the first and further compensation to correct the energy of the first energy distribution to calculate a position of the contact point in the first coordinate axis. The contact point correction method of claim 11, wherein the capacitive touch screen comprises a plurality of capacitive sensors arranged in an array in a horizontal direction and a vertical direction, the first original data representing the original data in the horizontal direction, the first The two original data represent the original data in the vertical direction, the first coordinate axis is along the coordinate axis of the horizontal direction, and the second coordinate axis is along the coordinate axis of the vertical direction. The contact point correction method according to claim 12, wherein the step (b) comprises: obtaining, by the original data in the horizontal direction, the energy value M _d1 sensed by any of the capacitive sensors and the capacitive sensing along the two sides of the horizontal direction The energy values L _d1 , R _d1 sensed by the device are used to calculate the first energy distribution Eng _a along the horizontal direction, wherein the first energy distribution Eng _d1 satisfies the following relationship: when L _d1 >R _d1 , Eng _D1 = (L _{d1 -} R _d1 ) / (M _{d1 -} R _d1 ) When R _d1 > L _d1 , Eng _d1 = (R _{d1 -} L _d1 ) / (M _{d1 -} R _d1 ) The contact point correction method of claim 13, wherein the step (c) comprises: obtaining, in the vertical direction, the first-capacitance sensor along the sensed energy value M _d2 and the two sides of the vertical direction The energy values U _d2 , D _d2 sensed by the two capacitive sensors are used to calculate the second energy distribution Eng _d2 along the vertical direction, wherein the second energy distribution Eng _d2 satisfies the following relationship: when U _d2 >D _d2 When Eng _d2 = (U _{d2 -} D _d2 ) / (M _{d2 -} D _d2 ) When D _d2 > U _d2 , Eng _d2 = (D _d2 - U _d2 ) / (M _d2 - U _d2 )