TWI497394B - Electronic device and method for determining touch point - Google Patents

Description

Electronic device and touch point judging method

The invention relates to an electronic device and a touch point judging method, and in particular to an electronic device and a touch point judging method capable of improving the accuracy of judging a touch point.

At present, the touch panel can be mainly divided into a resistive touch panel, a capacitive touch panel, an acoustic wave touch panel, and an optical touch panel according to the sensing principle. Among them, the capacitive touch panel is most widely used in the input interface of electronic devices such as notebook computers, mobile phones or portable multimedia players.

However, the capacitive touch panel is prone to malfunction due to factors such as static electricity or humidity. For example, when a liquid (such as water) is located on a capacitive touch panel, the capacitive touch panel may generate a random report point and perform the above-mentioned random report point because the position where the liquid is located is the actual touch point. In the case of the operation command, but these random reporting points are not generated by the finger or the capacitive stylus contacting the capacitive touch panel, and the operation instructions corresponding to the random reporting points should not be executed.

In addition, when the user's finger or palm touches the capacitive touch panel over a large area, the capacitive touch panel is susceptible to noise interference, and the accuracy of detecting the touch point of the capacitive touch panel is reduced.

In view of the above problems, the present disclosure provides an electronic device and a touch point judging method, which are different in energy change caused by a user's finger contacting a capacitive touch panel of the electronic device and a liquid on the capacitive touch panel. And corresponding to the characteristics of different ridge lengths in the energy change, to determine whether the capacitive touch panel is touched by the actual touch point or is affected by the liquid.

According to an embodiment of the present disclosure, an electronic device mainly includes a capacitive touch panel, a detection module, and a processing module. The capacitive touch panel has a plurality of sensing units. The detection module is electrically connected between the plurality of sensing units and the processing module. The detection module is configured to detect a capacitance change amount of the plurality of sensing units, and generate a plurality of energy information corresponding to the capacitance change amounts of the sensing units. The processing module is configured to calculate a slope change amount between the energy information of each sensing unit and the plurality of energy information of the adjacent plurality of sensing units, and obtain the energy information corresponding to each sensing unit. Response. Then, the processing module sequentially determines whether the response value of each sensing unit is greater than the first preset threshold, and classifies the plurality of response values greater than the first preset threshold into the database for obtaining by the database. The distribution of the plurality of sensing units corresponding to the response values is calculated, and the total number of the plurality of sensing units that are consecutively adjacent is calculated, thereby determining whether the total number is smaller than the second preset value, so as to confirm that the total number corresponds to Whether the number of these sensing units is touched by the actual touch point.

In one embodiment, in the process of the processing module calculating the total number of consecutively adjacent plurality of sensing units, the processing module further has a plurality of consecutive adjacent sensations. The measurement unit is converted to the ridge length, which is related to the total number.

According to the foregoing embodiment, when the processing module determines that the total number is greater than the second preset value, the processing module further analyzes the shape of the ridge length corresponding to the total number to determine whether the liquid is located in the capacitive touch panel. Caused by the surface.

In one embodiment, in the process that the processing module sequentially determines whether the response value of each sensing unit is greater than the first preset threshold, the processing module further determines whether the response value of each sensing unit is greater than The three preset thresholds are touched by the actual touch point at the position of the sensing unit corresponding to the response value that is confirmed to be greater than the third preset threshold value, wherein the third preset threshold value is greater than the first preset threshold value .

According to an embodiment of the present invention, a touch point determination method is applicable to an electronic device having a capacitive touch panel. The step flow of the touch point judging method is as follows. Detecting a capacitance change amount of the plurality of sensing units in the capacitive touch panel, and generating a plurality of energy information corresponding to the capacitance change amount of the plurality of sensing units. Calculating a slope change amount between the energy information of each sensing unit and the plurality of energy information of the adjacent plurality of sensing units, and obtaining a response value corresponding to the energy information of each sensing unit. The response value of each sensing unit is sequentially determined to be greater than a first preset threshold, and a plurality of response values greater than the first preset threshold are classified into a database. The distribution of the plurality of sensing units corresponding to the plurality of response values is obtained from the database, and the total number of the plurality of sensing units that are consecutively adjacent is calculated. It is determined whether the total number is less than the second preset value to confirm whether the position of the plurality of sensing units corresponding to the total number is touched by the actual touch point.

In one embodiment, the step of obtaining a plurality of sensing units corresponding to the plurality of response values by the database, and calculating the total number of consecutively adjacent plurality of sensing units, further includes A plurality of consecutive sensing units are converted into ridge lengths, the length of which is related to the total number.

According to the above embodiment, when the electronic device determines that the total number is greater than the second preset value, the electronic device further analyzes the shape corresponding to the total number of ridge lengths to determine whether the liquid is located on the surface of the capacitive touch panel. caused.

In one embodiment, the step of sequentially determining whether the response value of each sensing unit is greater than the first preset threshold further includes determining whether the response value of each sensing unit is greater than a third preset threshold. The position of the sensing unit corresponding to the response value that is confirmed to be greater than the third preset threshold value is touched by the actual touch point, wherein the third preset threshold value is greater than the first preset threshold value.

In summary, the present disclosure provides an electronic device and a touch point determining method, which are calculated by converting a capacitance change amount of a plurality of sensing units in a capacitive touch panel of an electronic device into a plurality of energy information. The amount of change in the slope between the energy information of each sensing unit and the plurality of energy information of the adjacent plurality of sensing units and the response value of each sensing unit corresponding to the energy information, so that the electronic device can pass through The response value of each sensing unit determines whether the position of the sensing unit is touched by the actual touch point or the liquid is attached to the position of the sensing unit, so that the electronic device can perform the corresponding touch The operation instruction of the point or the operation instruction corresponding to the liquid is automatically ignored.

The above description of the disclosure and the following embodiments The description is intended to illustrate and explain the spirit and principles of the invention, and to provide a further explanation of the scope of the invention.

1‧‧‧Electronic device

10‧‧‧Capacitive touch panel

12‧‧‧Detection module

14‧‧‧Processing module

2‧‧‧Liquid

TP‧‧‧ actual touch point

Energy information of Z0~Z8‧‧‧ sensing unit

S40~S48, S420~S422, S480~S484‧‧‧Step process

1 is a functional block diagram of an electronic device according to an embodiment of the present disclosure.

FIG. 2A is a schematic diagram showing the simultaneous presence of liquid and actual touch points of the capacitive touch panel of the electronic device according to an embodiment of the present disclosure.

FIG. 2B is a schematic diagram of energy information of a plurality of sensing units in the capacitive touch panel according to FIG. 2A.

FIG. 3A is a schematic diagram of a three by three sensing unit array in the capacitive touch panel according to FIG. 2A.

FIG. 3B is a spatial mask corresponding to the response value of each sensing unit in the energy information according to an embodiment of the present disclosure.

Figure 4 is a flow chart showing the steps of the touch point judging method according to an embodiment of the present disclosure.

Fig. 5 is a detailed flow chart in step S42 according to Fig. 4.

Fig. 6 is a detailed flow chart in step S48 according to Fig. 4.

The detailed features and advantages of the present invention are described in detail below in the embodiments of the present invention. The related objects and advantages of the present invention will be readily understood by those skilled in the art. The following examples are intended to describe the present invention in further detail, but are not intended to limit the scope of the invention.

[One embodiment of electronic device]

Please refer to FIG. 1 , which is a functional block diagram of an electronic device according to an embodiment of the present disclosure. As shown in FIG. 1 , the electronic device 1 of the embodiment of the present invention is a touch-type electronic device (for example, a smart phone or a tablet computer) that is operated by a user's finger touch. The electronic device 1 mainly includes a capacitor. The touch panel 10 , the detection module 12 , and the processing module 14 are electrically connected between the capacitive touch panel 10 and the processing module 14 . The functional modules in the electronic device 1 will be described in detail below.

The capacitive touch panel 10 includes a display module (not shown) and a touch module (not shown), wherein the touch module is disposed on the display module and the housing of the electronic device 1 Between the top surface (such as scratch-resistant glass). The display module has a plurality of pixels (not shown in the figure), a plurality of gate lines (not shown in the figure), and a plurality of data lines (not shown in the drawings), the plurality of The plurality of pixels are arranged in a matrix and are electrically connected to one of the plurality of gate lines and the plurality of data lines. Between one. Since the arrangement and driving method of the plurality of pixels in the display module are known to those of ordinary skill in the art, they are not described in detail. In practice, the display module can be a light emitting diode (LED) display panel, a liquid crystal display (LCD) or other types of display. The invention is not limited herein.

The touch module has a plurality of sensing units (not shown) for providing an input function associated with the display module, so each sensing unit corresponds to at least one pixel. The sensing unit described above may also be referred to as a glidepad. In more detail, the touch module has a first electrode portion and a second electrode portion, wherein the first electrode portion has a plurality of first sensing series arranged in a first direction, and the second electrode portion has a second direction Arranging a plurality of second sensing series, wherein each of the first sensing series and the second sensing series are formed by serially connecting a plurality of sensing units. In practice, the first electrode portion and the second electrode portion are both transparent conductive films, and the material thereof may be transparent such as indium tin oxide (ITO), indium zinc oxide (IZO), or the like. Transparent conductive oxide (TCO), but not limited to this. In addition, the present invention does not limit the structure in which the first electrode portion and the second electrode portion are integrated into a single conductive layer or two different conductive layers, and if the first electrode portion and the second electrode portion are two For the structure of different conductive layers, an insulating layer is disposed between the two different conductive layers, and the insulating layer is a highly transparent material, such as cerium oxide, tantalum nitride or a combination thereof. Structure, but not limited to this.

The detecting module 12 is electrically connected to the plurality of sensing units in the capacitive touch panel 10, and the detecting module 12 is configured to detect a capacitance change amount of the plurality of sensing units, and generate A plurality of energy information corresponding to the amount of change in capacitance of the sensing units. In more detail, the detection module 12 includes a detection unit (not shown) and a digital analog conversion unit (not shown), wherein the detection unit is electrically connected. The plurality of sensing units, the digital analog conversion unit is electrically connected between the detecting unit and the processing module. The detecting unit is configured to detect a capacitance change amount of the plurality of sensing units, and the digital analog converting unit is configured to convert the capacitance change amount digits of the sensing units to the plurality of energy information.

In actual operation, when at least one actual touch point is formed on the surface of the capacitive touch panel 10 (for example, by a finger touch or a capacitive stylus touch), the corresponding multiple touch points are The power of the sensing unit changes. In addition, when a liquid (for example, water) is located on the surface of the capacitive touch panel 10, the amount of electric power of the plurality of sensing units corresponding to the positions of the liquids also changes. Please refer to FIG. 2A and FIG. 2B together. FIG. 2A is a schematic diagram showing the simultaneous appearance of liquid and actual touch points of the capacitive touch panel of the electronic device according to an embodiment of the disclosure; FIG. 2B is a 2A is a schematic diagram of energy sensing information of a plurality of sensing units in a capacitive touch panel of FIG.

As shown in FIG. 2A, a liquid 2 and a plurality of actual touch points TP are simultaneously present on the surface of the capacitive touch panel 10, wherein the liquid 2 is irregularly and discretely located on the surface of the capacitive touch panel 10, and The plurality of actual touch points TP are formed by the five fingers of the user contacting the capacitive touch panel 10 and the five fingers are stationary. Thereby, the electric quantity of the plurality of sensing units corresponding to the liquid 2 and the plurality of actual touch points TP may change, and the energy information corresponding to the capacitance change amount of the sensing units may be as shown in FIG. 2B. .

It can be clearly seen from FIG. 2B that the energy of the plurality of actual touch points TP on the energy information is higher than the energy of the liquid 2 in the energy information. Degree, and the ridgeline length of the liquid 2 in the energy information is significantly larger than the ridgeline length of the actual touch point TP on the energy information, that is, the energy information with the longer ridgeline length is the energy information with the water ripple characteristic value. The ridgeline length of the liquid 2 in the energy information is proportional to the area of the liquid 2 on the capacitive touch panel 10. In general, the energy of the plurality of actual touch points TP on the energy information is about four times the height of the energy of the liquid 2 in the energy information. For example, the energy of the liquid 2 in the energy information is about Between twenty and forty, the energy of the plurality of actual touch points TP on the energy information is approximately between 120 and 160, but the liquid 2 and the actual touch point TP are in the energy information. The height of the energy above is not limited to the above range.

The processing module 14 is configured to calculate the amount of change in the slope between the energy information of each sensing unit in the capacitive touch panel 10 and the plurality of energy information of the adjacent plurality of sensing units, and obtain each of the The sensing unit corresponds to a response value on the energy information. In more detail, the processing module 14 first calculates the second derivative of the energy information of each sensing unit in the first axial direction and the second derivative of the energy information in the second axial direction to obtain the energy of each sensing unit. The amount of change in slope between the information and the plurality of energy information of the adjacent plurality of sensing units.

In order to more clearly explain the process of obtaining the response value by the processing module 14, please refer to FIG. 3A, which is a schematic diagram of a three-by-three sensing unit array in the capacitive touch panel according to FIG. 2A. As shown in FIG. 3A, Z0 to Z8 in the three by three sensing cell array shown in FIG. 3A are represented as energy information of the corresponding sensing unit. Thereby, the energy change of the energy information of the sensing unit corresponding to the energy information Z0 in the first axial direction (for example, the X axis) (also referred to as energy gradient, energy information The order derivative) will be (Z0-Z4) and (Z5-Z0), respectively, and the second derivative of the energy information of the sensing unit corresponding to the energy information Z0 in the first axial direction will be the difference between the two energy changes, That is, the amount of change in slope (Z5-Z0)-(Z0-Z4)=Z5+Z4-2*Z0 between the energy information Z0 and the energy information Z4 and the energy information Z5 in the first axial direction and adjacent thereto. Similarly, the energy change of the energy information of the sensing unit corresponding to the energy information Z0 in the second axial direction (for example, the Y axis) will be (Z0-Z2) and (Z7-Z0), respectively, and the sense of the energy information Z0 is corresponding. The second derivative of the energy information of the measuring unit in the second axial direction is the difference between the two energy changes, that is, between the energy information Z0 and the second axially adjacent energy information Z2 and the energy information Z7. The amount of change in slope (Z7-Z0)-(Z0-Z2)=Z7+Z2-2*Z0.

In other words, the processing module 14 first calculates the first derivative of the energy information of each sensing unit in the first axial direction and the first derivative of the energy information in the second axial direction (ie, for each sensing). The energy information of the unit in the first axial direction and the energy information in the second axial direction are differentially differentiated, and then the first derivative of the energy information of each sensing unit in the first axial direction and the energy information in the second axial direction The first derivative of the first derivative is subjected to a partial differential operation to obtain a second derivative of the energy information of each sensing unit in the first axial direction and a second derivative of the energy information in the second axial direction.

Then, the processing module 14 sums the second derivative of the energy information of each sensing unit in the first axial direction and the second derivative of the energy information in the second axial direction to obtain the response value of each sensing unit. For the above example, the response of the sensing unit corresponding to the energy information Z0 will be (Z5+Z4-2*Z0)+(Z7+Z2-2*Z0)=Z5+Z4+Z7+Z2-4*Z0. Thereby, a spatial mask that can realize the response value of each sensing unit corresponding to the energy information according to the present invention can be shown in FIG. 3B. FIG. 3B is a spatial mask corresponding to the response value of each sensing unit in the energy information according to an embodiment of the present disclosure.

After the processing module 14 calculates the response value of each sensing unit corresponding to the energy information, the processing module 14 sequentially determines whether the response value of each sensing unit is greater than a first preset threshold, and A plurality of response values greater than the first predetermined threshold are sorted into a data base. In more detail, when the processing module 14 determines that the response value of one of the sensing units is less than the first preset threshold, the processing module 14 confirms that the sensing unit is not touched by the user or If the processing module 14 determines that the response value of one of the sensing units is greater than the first preset threshold, the processing module 14 confirms that the sensing unit is suspected of being used by the user. The touch is either disturbed by external noise (for example, the liquid 2 is attached to the surface corresponding to the sensing unit).

Then, the processing module 14 obtains the distribution of the plurality of sensing units corresponding to the plurality of response values from the database, and calculates the total number of the plurality of sensing units that are consecutively adjacent. It should be noted that, in the process of the processing module 14 calculating the total number of consecutively adjacent plurality of sensing units, the processing module 14 may further convert the plurality of sensing units that are consecutively adjacent to the ridge length. The length of the ridge line is related to the total number of the above.

Finally, the processing module 14 determines the previously calculated consecutive adjacencies Whether the total number of the plurality of sensing units is less than a second preset value to confirm whether the positions of the plurality of sensing units corresponding to the total number are touched by the actual touch point TP. In more detail, when the total number of consecutively adjacent plurality of sensing units determined by the processing module 14 is less than the second predetermined value, the processing module 14 confirms the plurality of senses corresponding to the total number of the foregoing. The position of the measuring unit is touched by the actual touch point TP (for example, the user's finger), and accordingly, the operation corresponding to the actual touch point TP position is performed; when the processing module 14 determines the continuous adjacent When the total number of the plurality of sensing units is greater than the second predetermined value, the processing module 14 confirms that the positions of the plurality of sensing units corresponding to the total number may be attached to the corresponding sensing unit by the liquid 2 The surface is either touched by the user in a wide range (for example, the palm touches the surface corresponding to the sensing unit).

Therefore, when the total number of consecutive adjacent sensing units determined by the processing module 14 is greater than the second preset value, the processing module 14 can further analyze the shape of the ridge length corresponding to the total number to determine Whether the liquid 2 is located on the surface of the capacitive touch panel 10, and then the liquid 2 is attached to the random report point generated by the surface corresponding to the sensing unit, so that the electronic device 1 of the present invention does not Since the liquid 2 is located on the surface of the capacitive touch panel 10, the operation of misjudgment is caused.

It should be noted that, in the process that the processing module 14 sequentially determines whether the response value of each sensing unit is greater than the first preset threshold, the processing module 14 can further determine whether the response value of each sensing unit is greater than a third preset threshold for pre-confirming the position of the sensing unit corresponding to the response value greater than the third preset threshold The touch is touched by the actual touch point TP, wherein the third preset threshold is greater than the first preset threshold, and the third preset threshold is related to the user's finger pressing the capacitive touch panel 10, the capacitive type The second derivative of the minimum energy change that the touch panel 10 will produce. In more detail, when the processing module 14 determines that the response value of one of the sensing units is greater than the third predetermined threshold, the processing module 14 confirms that the position of the sensing unit is touched by the actual touch point TP. Touch to speed up the processing time of the electronic device 1 to determine the actual touch point TP.

[One embodiment of the touch point judgment method]

Please refer to FIG. 1 to FIG. 4 together. FIG. 4 is a flow chart showing the steps of the touch point determining method according to an embodiment of the present disclosure. As shown in FIG. 4, the touch point judging method is applied to the electronic device 1 having the capacitive touch panel 10 shown in FIG. The following is a detailed description of each step flow in the touch point judging method.

In step S40, the electronic device 1 detects the capacitance change amount of the plurality of sensing units in the capacitive touch panel 10, and generates a plurality of energy information corresponding to the capacitance change amounts of the sensing units. In more detail, in step S40, after the electronic device 1 detects the capacitance change amount of the plurality of sensing units in the capacitive touch panel 10, the electronic device 1 changes the capacitance of the plurality of sensing units. The digits are converted into multiple energy information.

In step S42, the electronic device 1 calculates the amount of change in the slope between the energy information of each sensing unit and the plurality of energy information of the adjacent plurality of sensing units, and obtains corresponding to each sensing unit. The response value on the energy information. In order to more clearly explain the detailed procedure flow of step S42, refer to FIG. 5, which is a detailed flowchart of step S42 according to FIG. 4. As shown in FIG. 5, in step S420, the electronic device 1 first calculates the second derivative of the energy information of each sensing unit in the first axial direction and the second derivative of the energy information in the second axial direction. Next, in step S422, the electronic device 1 sums the second derivative of the energy information of each sensing unit in the first axial direction and the second derivative of the energy information in the second axial direction to obtain each sensing unit. The response value.

Referring to FIG. 4 again, in step S44, the electronic device 1 sequentially determines whether the response value of each sensing unit is greater than the first preset threshold, and will have multiple response values greater than the first preset threshold. Classified to the database. Next, in step S46, the electronic device 1 obtains the distribution of the plurality of sensing units corresponding to the plurality of response values from the database, and calculates the total number of the plurality of sensing units that are consecutively adjacent. Finally, in step S48, the electronic device 1 determines whether the total number of consecutively adjacent plurality of sensing units is less than a second preset value, to confirm whether the positions of the plurality of sensing units corresponding to the total number are Touched by the actual touch point TP.

It is noted that the electronic device 1 obtains, from the database, a distribution of a plurality of sensing units corresponding to the plurality of response values, and calculates a total number of consecutively adjacent plurality of sensing units (ie, steps) In S46), the electronic device 1 converts the plurality of sensing units that are adjacent to each other into a ridge line length, and the ridge line length is related to the total number, so that the electronic device 1 can determine the capacitive touch panel through the ridge length. Whether the surface of 10 is attached to the liquid 2.

Please refer to FIG. 6 , which is a diagram according to FIG. 4 in step S48. Detailed flowchart in the process. As shown in FIG. 6, in step S480, the electronic device 1 determines whether the total number determined by step S46 is less than the second preset value. If the electronic device 1 determines that the total number determined by step S46 is less than the second preset value, step S482 is performed; if the electronic device 1 determines that the total number determined by step S46 is greater than the second preset When the value is reached, step S484 is performed. In step S482, the electronic device 1 confirms that the positions of the plurality of sensing units corresponding to the total number are touched by the actual touch point TP. In step S484, the electronic device 1 then analyzes the shape corresponding to the total number of ridge lengths to determine whether the liquid 2 is on the surface of the capacitive touch panel 10 or the palm is attached to the capacitive touch. Caused on the surface of the panel 10.

In addition, in the step that the electronic device 1 sequentially determines whether the response value of each sensing unit is greater than the first preset threshold (ie, step S44), the electronic device 1 can further determine whether the response value of each sensing unit is greater than The third preset threshold is touched by the actual touch point TP at a position corresponding to the response value corresponding to the third preset threshold value, wherein the third preset threshold is greater than the first Preset threshold.

[Possible effects of the examples]

In summary, the embodiment of the present invention provides an electronic device and a touch point determining method, which converts a capacitance change amount of a plurality of sensing units in a capacitive touch panel of an electronic device into a plurality of energy information, Calculating the amount of change in the slope between the energy information of each sensing unit and the plurality of energy information of the adjacent sensing units and the response of each sensing unit to the energy information The value is such that the electronic device can determine whether the position of the sensing unit is touched by the actual touch point or the liquid of the sensing unit is attached to the position of the sensing unit through the response value of each sensing unit. The electronic device can execute an operation command corresponding to the actual touch point or automatically ignore the operation operation instruction corresponding to the liquid. Therefore, the electronic device and the touch point judging method of the embodiment of the invention can effectively improve the accuracy of the electronic device for determining the touch point, and avoid the liquid and the user's finger being simultaneously located on the surface of the capacitive touch panel. The misjudgment operation that will be caused is very practical.

Although the present invention has been disclosed above in the above embodiments, it is not intended to limit the invention. It is within the scope of the invention to be modified and modified without departing from the spirit and scope of the invention. Please refer to the attached patent application for the scope of protection defined by the present invention.

Claims (14)

A method for determining a touch point is applicable to an electronic device having a capacitive touch panel. The method for determining a touch point includes: detecting a capacitance change of a plurality of sensing units in the capacitive touch panel, and Generating a plurality of energy information corresponding to the amount of capacitance change of the sensing units; calculating a slope change amount between the energy information of each of the sensing units and the energy information of the adjacent sensing units, And obtaining a response value corresponding to the energy information of each of the sensing units; sequentially determining whether the response value of each of the sensing units is greater than a first preset threshold, and greater than the first The response values of the preset thresholds are classified into a database; the distribution of the sensing units corresponding to the response values is obtained from the database, and one of the sensing units continuously adjacent to each other is calculated And determining whether the total number is less than a second preset value to confirm whether the position of the sensing units corresponding to the total number is touched by an actual touch point. The method for determining a touch point according to claim 1, wherein the distribution of the sensing units corresponding to the response values is obtained from the database, and the consecutive adjacent ones of the sensing units are calculated. The step of total number further includes converting the consecutive adjacent sensing units into a ridge length, the ridge length being related to the total number. The touch point judging method of claim 2, wherein when the electronic device determines that the total number is greater than the second preset value, the electronic device further analyzes the shape of the ridge length corresponding to the total number, It is determined whether the liquid is located on the surface of the capacitive touch panel. The method for determining a touch point according to claim 1, wherein when the electronic device determines that the total number is less than the second preset value, the electronic device confirms the total number of the sensing units The position is touched by the actual touch point. The method for determining a touch point according to claim 1, wherein in the step of calculating a slope change amount between the energy information of each of the sensing units and the energy information of the adjacent sensing units, The method further includes: calculating a second derivative of the energy information of each of the sensing units in a first axial direction and a second derivative of the energy information in a second axial direction; and placing each of the sensing units on the first axis The second derivative of the upward energy information and the second derivative of the energy information in the second axis are summed to obtain the response value of each of the sensing units. The touch point judging method of claim 1, wherein the step of generating the energy information corresponding to the capacitance change amount of the sensing units further comprises converting the capacitance change amount digits of the sensing units into The energy information. The method for determining a touch point according to claim 1, wherein in the step of sequentially determining whether the response value of each of the sensing units is greater than the first preset threshold, further comprising determining each of the sensing units Whether the response value is greater than a third preset threshold to pre-confirm the sensing list corresponding to the response value greater than the third preset threshold The position of the element is touched by the actual touch point, wherein the third preset threshold is greater than the first preset threshold. An electronic device includes: a capacitive touch panel having a plurality of sensing units; a detecting module electrically connected to the sensing units for detecting capacitance changes of the sensing units, and A plurality of energy information corresponding to the amount of capacitance change of the sensing units is generated; and a processing module is electrically connected to the detecting module for calculating the energy information and adjacent each of the sensing units The amount of change in the slope between the energy information of the sensing units, and obtaining a response value corresponding to each of the sensing units on the energy information, and then sequentially determining each of the sensing units Whether the response value is greater than a first preset threshold, and classifying the response values greater than the first preset threshold into a database to obtain corresponding values of the response values in the database a distribution of the sensing units, and calculating a total number of the adjacent sensing units that are consecutively adjacent, and determining whether the total number is less than a second preset value to confirm that the total number is corresponding to the total number of Whether the positions of the sensing units are subject to an actual Touch-touch. The electronic device of claim 8, wherein in the process of calculating, by the processing module, the total number of consecutively adjacent sensing units, the processing module further converts the consecutive adjacent sensing units into The length of a ridge line, the length of the ridge line being related to the total number. The electronic device of claim 9, wherein when the processing module determines that the total number is greater than the second predetermined value, the processing module further analyzes the shape of the ridge length corresponding to the total number of It is determined whether the liquid is located on the surface of the capacitive touch panel. The electronic device of claim 8, wherein the processing module confirms the location of the sensing units corresponding to the total number when the processing module determines that the total number is less than the second preset value It is touched by the actual touch point. The electronic device of claim 8, wherein the processing module calculates a slope change amount between the energy information of each of the sensing units and the energy information of the adjacent sensing units. The processing module first calculates a second derivative of the energy information of each of the sensing units in a first axial direction and a second derivative of the energy information in a second axial direction, and each of the sensing units is The second derivative of the energy information in the first axial direction is summed with the second derivative of the energy information in the second axial direction to obtain the response value of each of the sensing units. The electronic device of claim 8, wherein the detecting module further comprises a detecting unit and a digital analog converting unit, wherein the digital analog converting unit is electrically connected between the detecting unit and the processing module. The detecting unit is configured to detect a capacitance change amount of the sensing units, and the digital analog converting unit is configured to convert the capacitance change amount digits of the sensing units into the energy information. The electronic device of claim 8, wherein the processing module determines each of the processing modules to determine whether the response value of each of the sensing units is greater than the first predetermined threshold. Whether the response value of the sensing unit is greater than a third a preset threshold value, wherein the position of the sensing unit corresponding to the response value greater than the third preset threshold value is touched by the actual touch point, wherein the third preset threshold value is greater than the first A preset threshold.