Electromagnetic touch input method and apparatus, electronic device, storage medium

Abstract

The present application relates to electromagnetic touch technology field, especially in kind, especially in kind, an electromagnetic touch input method and its device, electronic equipment, storage medium.The present application electromagnetic touch input method, first from the electromagnetic transceiver coil delivery end to the input area delivery scanning current, when the scanning current returns to the receiving end of the electromagnetic transceiver coil, form contact induction electromagnetic field, then based on contact induction electromagnetic field global scanning, detect electromagnetic resonance signal formed when the electromagnetic pen contacts the input area, further, analyze electromagnetic resonance signal and obtain contact position information, wherein the contact position information reflects the position of the contact point between the electromagnetic pen and the input area.Finally, based on the contact position information, the input data input via the electromagnetic touch device is obtained.Based on the electromagnetic touch input method of the present application, the contact position information between the electromagnetic pen and the input area can be accurately determined based on the analysis of the electromagnetic resonance signal, thereby improving the accuracy of the electromagnetic touch input.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electromagnetic touch, in particular to an electromagnetic touch input method and device, electronic equipment and storage medium. BACKGROUND

[0002] With the improvement of people's living standards, electromagnetic touch technology has been more and more applied. The electromagnetic touch device includes an electromagnetic touch panel and an electromagnetic pen. The electromagnetic touch panel includes an electromagnetic touch control circuit and an electromagnetic touch antenna circuit. The electromagnetic touch control circuit is referred to as a control panel, and the electromagnetic touch antenna circuit is referred to as an antenna panel. The antenna panel is used to receive electromagnetic signals from the electromagnetic pen and transmit the received electromagnetic signals to the control panel for signal processing, and finally obtain a series of information of the electromagnetic pen, such as coordinate information and pressure information. However, in the related art, the electromagnetic touch panel cannot accurately obtain the touch position information of the electromagnetic pen. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the prior art. To this end, the present application provides an electromagnetic touch input method and device, electronic equipment and storage medium, which can accurately obtain the touch position information of the electromagnetic pen.

[0004] The electromagnetic touch input method according to the first aspect of the present application is applied to an electromagnetic touch device, and the electromagnetic touch device includes a touch panel and an electromagnetic pen. The input area of the touch panel is internally laid with an electromagnetic transceiver coil. The method includes:

[0005] delivering a scanning current from the delivery end of the electromagnetic transceiver coil to the input area;

[0006] forming a contact-induced electromagnetic field when the scanning current returns to the receiving end of the electromagnetic transceiver coil;

[0007] performing global scanning based on the contact-induced electromagnetic field to detect an electromagnetic resonance signal formed when the electromagnetic pen contacts the input area;

[0008] analyzing the electromagnetic resonance signal and obtaining contact position information, which reflects the position of the contact point between the electromagnetic pen and the input area;

[0009] obtaining input data input via the electromagnetic touch device based on the contact position information.

[0010] Optionally, according to some embodiments of the present application, the global scanning based on the contact-induced electromagnetic field to detect the electromagnetic resonance signal formed when the electromagnetic pen contacts the input area includes:

[0011] When the electromagnetic pen contacts the input area, the contact induces an electromagnetic field to generate a contact-induced signal;

[0012] The electromagnetic resonance signal is obtained based on the electromagnetic transceiving coil, and the electromagnetic resonance signal is diffused in the contact-induced electromagnetic field from the contact point via the contact-induced signal.

[0013] Optionally, according to some embodiments of the present application, the electromagnetic resonance signal includes a first type of resonance signal and a second type of resonance signal, and the analyzing the electromagnetic resonance signal and obtaining the contact position information includes:

[0014] A first amplitude signal strength data is determined according to the first type of resonance signal, and the first amplitude signal strength data reflects a variation trend of an amplitude of the contact-induced signal in a first direction of the contact-induced electromagnetic field;

[0015] A second amplitude signal strength data is determined according to the second type of resonance signal, and the second amplitude signal strength data reflects a variation trend of an amplitude of the contact-induced signal in a second direction of the contact-induced electromagnetic field, and the first direction is not collinear with the second direction;

[0016] The contact position information is obtained based on the first amplitude signal strength data and the second amplitude signal strength data.

[0017] Optionally, according to some embodiments of the present application, the first amplitude signal strength data includes a first analytical expression, and the determining the first amplitude signal strength data according to the first type of resonance signal includes:

[0018] A plurality of first type of sampling points are selected in the first direction, and a plurality of first type of sampling coordinates of the plurality of first type of sampling points are obtained;

[0019] A plurality of first type of sampling amplitudes corresponding to the plurality of first type of sampling coordinates are obtained from the first type of resonance signal based on the plurality of first type of sampling coordinates;

[0020] The first analytical expression is obtained according to the plurality of first type of sampling coordinates and the plurality of first type of sampling amplitudes.

[0021] Optionally, according to some embodiments of the present application, the second amplitude signal strength data includes a second analytical expression, and the determining the second amplitude signal strength data according to the second type of resonance signal includes:

[0022] A plurality of second type of sampling points are selected in the second direction, and a plurality of second type of sampling coordinates of the plurality of second type of sampling points are obtained;

[0023] Based on the second type sampling coordinates, second type sampling amplitudes corresponding to the second type sampling coordinates are obtained from the second type resonance signals.

[0024] According to the second type sampling coordinates and the second type sampling amplitudes, the second analytical expression is obtained.

[0025] Optionally, according to some embodiments of the present application, the contact position information is obtained based on the first amplitude signal strength data and the second amplitude signal strength data, and the method comprises:

[0026] Based on the first analytical expression, a first positioning coordinate corresponding to a first peak value in the first analytical expression is obtained.

[0027] Based on the second analytical expression, a second positioning coordinate corresponding to a second peak value in the second analytical expression is obtained.

[0028] According to the first positioning coordinate and the second positioning coordinate, the contact position information is obtained.

[0029] According to a second aspect of the present application, an electromagnetic touch device comprises a touch panel and an electromagnetic pen, and the input area of the touch panel is internally paved with electromagnetic transceiving coils.

[0030] The detection module is configured to transmit a scanning current from the transmitting end of the electromagnetic transceiving coil to the input area, form a contact-induced electromagnetic field when the scanning current returns to the receiving end of the electromagnetic transceiving coil, and detect an electromagnetic resonance signal formed when the electromagnetic pen contacts the input area based on the contact-induced electromagnetic field.

[0031] The data processing module is configured to analyze the electromagnetic resonance signal and obtain contact position information, and obtain input data input via the electromagnetic touch device based on the contact position information, wherein the contact position information reflects the position of the contact point between the electromagnetic pen and the input area.

[0032] Optionally, according to some embodiments of the present application, the electromagnetic transceiving coils are arranged in a single-coil wiring mode and are arranged in a staggered manner along a first direction and a second direction in the input area to form a contact-induced electromagnetic field, and the first direction and the second direction are not collinear.

[0033] In a third aspect, an electronic device is provided, comprising a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the electromagnetic touch input method according to any one of the embodiments of the first aspect of the present application.

[0034] In a fourth aspect, an embodiment of the present application provides a computer readable storage medium, the storage medium storing a program, and the program being executed by a processor to implement the electromagnetic touch input method according to any one of the embodiments of the first aspect of the present application.

[0035] The electromagnetic touch input method and the device, the electronic device and the storage medium according to the embodiments of the present application have at least the following beneficial effects:

[0036] In the electromagnetic touch input method, the scanning current is first transmitted from the transmitting end of the electromagnetic transceiving coil to the input area, and when the scanning current returns to the receiving end of the electromagnetic transceiving coil, a contact-induced electromagnetic field is formed. Then, global scanning is performed based on the contact-induced electromagnetic field, and an electromagnetic resonance signal formed when the electromagnetic pen contacts the input area is detected. Further, the electromagnetic resonance signal is analyzed and contact position information is obtained, wherein the contact position information reflects the position of the contact point between the electromagnetic pen and the input area. Finally, based on the contact position information, input data input via the electromagnetic touch device is obtained. Based on the electromagnetic touch input method, the contact position information between the electromagnetic pen and the input area can be accurately determined based on the analysis of the electromagnetic resonance signal, thereby improving the accuracy of the electromagnetic touch input.

[0037] Additional aspects and advantages of the present application will be made apparent from the following description, which proceeds with reference to the accompanying drawings, and will be particularly apparent to those skilled in the art from the practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0038] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0039] Figure 1 A flowchart of the electromagnetic touch input method according to an embodiment of the present application is shown in FIG. 1;

[0040] Figure 2 Another flowchart of the electromagnetic touch input method according to an embodiment of the present application is shown in FIG. 2;

[0041] Figure 3 Another flowchart of the electromagnetic touch input method according to an embodiment of the present application is shown in FIG. 3;

[0042] Figure 4 Another flowchart of the electromagnetic touch input method according to an embodiment of the present application is shown in FIG. 4;

[0043] Figure 5 Another flowchart of the electromagnetic touch input method according to an embodiment of the present application is shown in FIG. 5;

[0044] Figure 6 Another flowchart of the electromagnetic touch input method according to an embodiment of the present application is shown in FIG. 6;

[0045] Figure 7 Fig. 1 is a schematic diagram of a module assembly of an electromagnetic touch device according to an embodiment of the present application;

[0046] Figure 8 Fig. 2 is a schematic diagram of an electronic device for implementing an electromagnetic touch input method according to an embodiment of the present application. DETAILED DESCRIPTION

[0047] Embodiments of the present application are described in detail below with reference to the attached drawings. The embodiments described below are examples of the present application and are not intended to limit the present application. The same or similar components are denoted by the same or similar reference numerals throughout the drawings.

[0048] In the description of the present application, the meaning of one or more is one or more, the meaning of multiple is two or more, greater than, less than, more than, etc. are understood as not including the number, above, below, within, etc. are understood as including the number. If it is described as first, second, etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of indicated technical features.

[0049] In the description of the present application, it should be understood that the description of the position, such as up, down, left, right, front, back, etc. is based on the position or location relationship shown in the drawings, and is only for the purpose of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application.

[0050] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0051] In the description of the present application, it should be noted that, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution. In addition, the identification of the specific steps in the following does not represent the limitation of the order and execution logic of the steps, and the execution order and execution logic between the steps should be understood and inferred with reference to the corresponding description in the following embodiments.

[0052] With the improvement of people's living standards, electromagnetic touch technology has been more and more applied. The electromagnetic touch device includes an electromagnetic touch panel and an electromagnetic pen. The electromagnetic touch panel includes an electromagnetic touch control circuit and an electromagnetic touch antenna circuit. The electromagnetic touch control circuit is referred to as a control panel, and the electromagnetic touch antenna circuit is referred to as an antenna panel. The antenna panel is used to receive electromagnetic signals from the electromagnetic pen and transmit the received electromagnetic signals to the control panel for signal processing, and finally obtain a series of information of the electromagnetic pen, such as coordinate information and pressure information. However, in the related art, the electromagnetic touch panel cannot accurately obtain the touch position information of the electromagnetic pen.

[0053] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides an electromagnetic touch input method and device, an electronic device, and a storage medium, which can accurately obtain the touch position information of the electromagnetic pen.

[0054] Further description is made below with reference to the drawings.

[0055] Reference Figure 1 According to the electromagnetic touch input method of the first aspect of the present application, the electromagnetic touch device includes a touch panel and an electromagnetic pen, the input area of the touch panel is internally laid with electromagnetic transceiving coils, and the method includes the following steps:

[0056] Step S101: transmitting a scanning current from the delivery end of the electromagnetic transceiving coil to the input area;

[0057] Step S102: forming a contact-induced electromagnetic field when the scanning current returns to the receiving end of the electromagnetic transceiving coil;

[0058] It should be noted that the scanning current is output from the delivery end of the electromagnetic transceiving coil, returns to the receiving end of the electromagnetic transceiving coil after passing through the wiring path of the electromagnetic transceiving coil, and forms a contact-induced electromagnetic field based on the magnetic effect of the scanning current during the connection of the scanning current. According to some embodiments of the present application, the input area of the touch panel is internally laid with electromagnetic transceiving coils, which can be uniformly arranged in the input area or arranged in the input area according to the pre-set interval distance. It should be understood that the electromagnetic transceiving coils laid in the input area of the touch panel are used to form a contact-induced electromagnetic field, so the laying mode of the electromagnetic transceiving coils includes but is not limited to the specific embodiments mentioned above. In some preferred embodiments of the present application, the electromagnetic transceiving coils can be arranged in at least two directions inside the input area to more accurately obtain the contact position information.

[0059] Step S103: globally scanning based on the contact-induced electromagnetic field to detect the electromagnetic resonance signal formed when the electromagnetic pen contacts the input area;

[0060] According to some embodiments of the present application, the contact-induced electromagnetic field is in a stable state after the contact-induced electromagnetic field is formed due to the stable connection of the scanning current. When the electromagnetic pen is not in contact with the input area, the contact-induced electromagnetic field is still in the stable state, and thus the electromagnetic resonance signal formed when the electromagnetic pen contacts the input area cannot be detected. When the electromagnetic pen contacts the input area, the trigger signal generated by the resonance circuit in the electromagnetic pen resonates with the contact-induced electromagnetic field, so that the contact-induced signal is formed at the position where the electromagnetic pen contacts the input area, and then the electromagnetic resonance signal is further formed in the contact-induced electromagnetic field based on the influence of the formation of the contact-induced signal in the contact-induced electromagnetic field. It should be understood that the electromagnetic resonance signal spreads in all directions from the position where the electromagnetic pen contacts the input area (i.e., the position of the contact-induced signal) to form the electromagnetic resonance signal in the contact-induced electromagnetic field.

[0061] In step S104, the electromagnetic resonance signal is analyzed to obtain the contact position information, which reflects the position of the contact point between the electromagnetic pen and the input area.

[0062] It should be noted that the electromagnetic resonance signal is caused by the contact-induced signal, and energy is consumed in the environment, so the amplitude of the electromagnetic resonance signal is smaller than that of the contact-induced signal. In addition, the farther away from the position of the contact point, the more energy is consumed, and the smaller the amplitude of the electromagnetic resonance signal. Therefore, by analyzing the electromagnetic resonance signal, the contact position information can be obtained according to the change trend of the amplitude of the electromagnetic resonance signal. According to some embodiments of the present application, the change trend of the amplitude of the electromagnetic resonance signal can be approximately normally distributed, or can be approximately a quadratic function, or can be approximately other types of change trends. It should be understood that the change trend of the amplitude of the electromagnetic resonance signal includes but is not limited to the above-mentioned embodiments. In some preferred embodiments of the present application, according to the change trend of the electromagnetic resonance signal under different circumstances, a corresponding approximate analytical expression is selected for numerical calculation to obtain more accurate contact position information.

[0063] In step S105, the input data input through the electromagnetic touch device is obtained based on the contact position information.

[0064] It should be noted that after the contact position information is obtained, the information input by the user into the electromagnetic touch device can be recorded according to the contact position information and converted into corresponding input data.

[0065] The electromagnetic touch input method provided by the application comprises the following steps: firstly, sending a scanning current from a sending end of an electromagnetic transceiving coil to an input area; when the scanning current returns to a receiving end of the electromagnetic transceiving coil, a contact-induced electromagnetic field is formed; then, based on the contact-induced electromagnetic field, a global scanning is performed to detect an electromagnetic resonance signal formed when an electromagnetic pen contacts the input area; further, the electromagnetic resonance signal is analyzed to obtain contact position information, wherein the contact position information reflects the position of a contact point between the electromagnetic pen and the input area; finally, based on the contact position information, input data input via the electromagnetic touch device is obtained. Based on the electromagnetic touch input method provided by the application, the contact position information between the electromagnetic pen and the input area can be accurately determined based on the analysis of the electromagnetic resonance signal, thereby improving the accuracy of electromagnetic touch input.

[0066] Referring to Figure 2 According to some embodiments of the application, based on the contact-induced electromagnetic field, the global scanning is performed to detect the electromagnetic resonance signal formed when the electromagnetic pen contacts the input area, which comprises the following steps:

[0067] In step S201, when the electromagnetic pen contacts the input area, a contact-induced signal is generated by the contact-induced electromagnetic field.

[0068] According to some embodiments provided by the application, when the electromagnetic pen contacts the input area, a trigger signal generated by a resonance circuit in the electromagnetic pen resonates with the contact-induced electromagnetic field, so that the position where the electromagnetic pen contacts the input area forms the contact-induced signal, and then, based on the influence of the generation of the contact-induced signal in the contact-induced electromagnetic field, the electromagnetic resonance signal is further formed in the contact-induced electromagnetic field.

[0069] In step S202, the electromagnetic resonance signal is obtained based on the electromagnetic transceiving coil, and the electromagnetic resonance signal is formed in the contact-induced electromagnetic field via the contact-induced signal from the contact point.

[0070] It should be noted that the electromagnetic resonance signal is formed in the contact-induced electromagnetic field from the position of the contact point between the electromagnetic pen and the input area (i.e. the position of the contact-induced signal) to each direction around. It should be understood that the electromagnetic resonance signal is caused by the contact-induced signal, and there is energy consumption in the environment, so the amplitude of the electromagnetic resonance signal is smaller than that of the contact-induced signal. In addition, the farther away from the position of the contact point, the more energy consumption of the electromagnetic resonance signal, and the smaller the amplitude. Therefore, by analyzing the electromagnetic resonance signal, the contact position information can be obtained according to the change trend of the amplitude of the electromagnetic resonance signal.

[0071] Referring to Figure 3 According to some embodiments of the application, the electromagnetic resonance signal comprises a first type of resonance signal and a second type of resonance signal, and the analysis of the electromagnetic resonance signal and the obtaining of the contact position information comprises the following steps:

[0072] Step S301, determining first amplitude signal strength data according to the first type of resonance signal, the first amplitude signal strength data reflecting a variation trend of the amplitude of the contact-induced signal in the first direction of the contact-induced electromagnetic field;

[0073] It should be noted that the first type of resonance signal is the electromagnetic resonance signal corresponding to the contact-induced signal in the first direction of the contact-induced electromagnetic field. It should be understood that the farther the first type of resonance signal is from the contact point position in the first direction, the smaller the corresponding amplitude. It should be emphasized that the first amplitude signal strength data reflects the variation trend of the amplitude of the contact-induced signal in the first direction of the contact-induced electromagnetic field. In some embodiments of the present application, a quadratic function expression can be used as the first amplitude signal strength data, or a Gaussian distribution model can be simulated from the MCU to be used as the first amplitude signal strength data. It should be understood that the forms of the first amplitude signal strength data that can be used include but are not limited to the specific embodiments mentioned above. In some preferred embodiments of the present application, according to the variation trend of the first type of resonance signal under different occasions, a corresponding approximate analytical expression is selected for numerical calculation to obtain more accurate contact position information.

[0074] Step S302, determining second amplitude signal strength data according to the second type of resonance signal, the second amplitude signal strength data reflecting a variation trend of the amplitude of the contact-induced signal in the second direction of the contact-induced electromagnetic field, the first direction and the second direction being non-collinear;

[0075] It should be noted that the second type of resonance signal is the electromagnetic resonance signal corresponding to the contact-induced signal in the second direction of the contact-induced electromagnetic field. It should be understood that the farther the second type of resonance signal is from the contact point position in the second direction, the smaller the corresponding amplitude. It should be emphasized that the second amplitude signal strength data reflects the variation trend of the amplitude of the contact-induced signal in the second direction of the contact-induced electromagnetic field. In some embodiments of the present application, a quadratic function expression can be used as the second amplitude signal strength data, or a Gaussian distribution model can be simulated from the MCU to be used as the second amplitude signal strength data. It should be understood that the forms of the second amplitude signal strength data that can be used include but are not limited to the specific embodiments mentioned above. In some preferred embodiments of the present application, according to the variation trend of the second type of resonance signal under different occasions, a corresponding approximate analytical expression is selected for numerical calculation to obtain more accurate contact position information. It should be emphasized that the first direction and the second direction are non-collinear, which means that the first direction and the second direction are neither completely consistent nor completely opposite on a straight line.

[0076] Step S303, obtaining contact position information based on the first amplitude signal strength data and the second amplitude signal strength data.

[0077] According to some embodiments of the present invention, after obtaining the first amplitude signal intensity data, the corresponding component of the contact position information in the first direction can be determined based on the first amplitude signal intensity data. Similarly, after obtaining the second amplitude signal intensity data, the corresponding component of the contact position information in the second direction can be determined based on the second amplitude signal intensity data. It should be noted that the first direction and the second direction are not collinear. Therefore, by using the corresponding component of the contact position information in the first direction and the corresponding component of the contact position information in the second direction, accurate contact position information can be obtained in the plane where the input area is located.

[0078] Reference Figure 4 According to some embodiments of the present invention, the first amplitude signal intensity data includes a first analytical expression, and determining the first amplitude signal intensity data based on a first type of resonant signal includes:

[0079] Step S401: Select multiple first-type sampling points in the first direction and obtain the first-type sampling coordinates of the multiple first-type sampling points;

[0080] According to some embodiments of the present invention, multiple first-type sampling points are selected in a first direction, aiming to derive a first analytical expression based on the position data and amplitude data corresponding to the multiple first-type sampling points. It should be understood that the first amplitude signal strength data includes the first analytical expression; therefore, the first analytical expression also reflects the amplitude variation trend of the contact-induced signal in the first direction of the contact-induced electromagnetic field. It should be noted that selecting multiple first-type sampling points in the first direction means two or more. In some embodiments of the present invention, the first-type sampling coordinates refer to the coordinates of each first-type sampling point in the plane where the input area is located, and the coordinate system referenced by the first-type sampling coordinates can be flexibly set.

[0081] Step S402: Based on multiple first-type sampling coordinates, obtain multiple first-type sampling amplitudes corresponding to the multiple first-type sampling coordinates from the first-type resonant signal;

[0082] It should be noted that, given multiple first-type sampling coordinates, there are various methods for detecting the multiple first-type sampling amplitudes corresponding to these coordinates from the first-type resonant signal. These methods include inputting each first-type sampling coordinate into the MCU for integration to obtain the corresponding first-type sampling amplitude, or using a specialized amplitude measurement tool to measure the first-type sampling amplitude at each coordinate during the experiment. It should be understood that obtaining the multiple first-type sampling amplitudes corresponding to the multiple first-type sampling coordinates from the first-type resonant signal includes, but is not limited to, the specific embodiments described above.

[0083] In step S403, the first analytic expression is obtained according to the plurality of first sampling coordinates and the plurality of first sampling amplitudes.

[0084] According to some specific embodiments of the present application, when the first analytic expression is a quadratic function analytic expression f(x) = ax 2 + bx + c, three first sampling points A, B and C can be selected in the first direction, and the first sampling coordinates A(x1, 0), B(x2, 0) and C(x3, 0) corresponding to the three first sampling points are obtained based on a pre-set coordinate system xOy, wherein the x-axis direction of the coordinate system xOy is the first direction. Further, the three first sampling coordinates A(x1, 0), B(x2, 0) and C(x3, 0) are substituted into the quadratic function analytic expression f(x) = ax 2 + bx + c to obtain a first equation group:

[0085]

[0086] Further, the parameters a, b and c in the first analytic expression are obtained according to the first equation group, and finally the first analytic expression is obtained. It should be noted that the first analytic expression reflects the corresponding relationship between the first sampling coordinates and the first sampling amplitudes in the first direction, and it should be understood that if a sampling point is not in the first direction, the mapping point of the sampling point in the first direction can be taken as a first sampling point for sampling. It should be noted that the plurality of first sampling points refers to two or more sampling points. When the first analytic expression is a quadratic function analytic expression, if two first sampling points are collected and the two first sampling points have the same first sampling amplitude, the symmetry axis coordinates of the quadratic function analytic expression can be determined according to the first sampling coordinates corresponding to the two first sampling points, and the amplitude corresponding to the symmetry axis coordinates can be measured, and then the first analytic expression can be further obtained. It should be understood that obtaining the first analytic expression includes but is not limited to the specific embodiments mentioned above.

[0087] Referring to Figure 5 According to some embodiments of the present application, the second amplitude signal strength data includes a second analytic expression, and the second amplitude signal strength data is determined according to the second type of resonant signal, including:

[0088] In step S501, a plurality of second sampling points are selected in the second direction, and the second sampling coordinates of the plurality of second sampling points are obtained.

[0089] According to some embodiments of the present application, a plurality of second sampling points are selected in the second direction, aiming to obtain a second analytical expression according to the position data and the amplitude data corresponding to the plurality of second sampling points. It should be understood that the second amplitude signal strength data includes the second analytical expression, and thus the second analytical expression also reflects the amplitude variation trend of the contact-induced signal in the second direction of the contact-induced electromagnetic field. It should be noted that the plurality of second sampling points selected in the second direction refers to more than two. In some embodiments of the present application, the second sampling coordinates refer to the coordinates of the respective second sampling points in the plane where the input region is located, and the coordinate system to which the second sampling coordinates refer can be flexibly set.

[0090] In step S502, a plurality of second sampling amplitudes corresponding to the plurality of second sampling coordinates are obtained from the second resonant signal based on the plurality of second sampling coordinates.

[0091] It should be noted that in the case of obtaining the plurality of second sampling coordinates, there are a plurality of detection methods for obtaining the plurality of second sampling amplitudes corresponding to the plurality of second sampling coordinates from the second resonant signal. For example, the respective second sampling coordinates can be input into the MCU for integral operation to obtain the corresponding second sampling amplitudes, or a dedicated amplitude measuring tool can be used to measure the second sampling amplitudes at the respective second sampling coordinates in the experimental process. It should be understood that obtaining the plurality of second sampling amplitudes corresponding to the plurality of second sampling coordinates from the second resonant signal includes but is not limited to the specific embodiments mentioned above.

[0092] In step S503, a second analytical expression is obtained according to the plurality of second sampling coordinates and the plurality of second sampling amplitudes.

[0093] According to some more specific embodiments of the present application, when the second analytical expression is a quadratic function analytical expression g(y) = my 2 +ny+i, three second sampling points E, F, and G can be selected in the second direction first, and then the second sampling coordinates E(0, y1), F(0, y2), and G(0, y3) corresponding to the three second sampling points can be obtained based on a pre-set coordinate system xOy, where the y-axis direction of the coordinate system xOy is the second direction. Further, the three second sampling coordinates E(0, y1), F(0, y2), and G(0, y3) are substituted into the quadratic function analytical expression g(y) = my 2 +ny+i, to obtain a second equation group:

[0094]

[0095] Further, according to the second equation set, the parameters m, n, i in the second analytical expression can be obtained, and finally the second analytical expression is obtained. It should be noted that the second analytical expression reflects the correspondence between the second type of sampling coordinates and the second type of sampling amplitudes in the second direction. It should be understood that if the sampling point is not in the second direction, the mapping point of the sampling point in the second direction can be regarded as the second type of sampling point for sampling. It should be noted that the plurality of second type of sampling points refers to two or more sampling points. When the second analytical expression is a quadratic function analytical expression, if two second type of sampling points are collected and the two second type of sampling points have the same second type of sampling amplitude, the symmetry axis coordinate of the quadratic function analytical expression can be determined according to the second type of sampling coordinates corresponding to the two second type of sampling points, and then the amplitude corresponding to the symmetry axis coordinate is measured, and the second analytical expression can be further obtained. It should be understood that obtaining the second analytical expression includes but is not limited to the specific embodiments mentioned above.

[0096] With reference to Figure 6 According to some embodiments of the present application, based on the first amplitude signal strength data and the second amplitude signal strength data, the contact position information is obtained, including:

[0097] Step S601, based on the first analytical expression, the first positioning coordinate corresponding to the first peak in the first analytical expression is obtained;

[0098] Step S602, based on the second analytical expression, the second positioning coordinate corresponding to the second peak in the second analytical expression is obtained;

[0099] Step S603, according to the first positioning coordinate and the second positioning coordinate, the contact position information is obtained.

[0100] It should be noted that the electromagnetic resonance signal is formed by the electromagnetic pen and the input region in the contact sensing electromagnetic field, and the electromagnetic resonance signal is formed from the position of the contact point between the electromagnetic pen and the input region (i.e., the position of the contact sensing signal) to the surrounding directions. It should be understood that the electromagnetic resonance signal is caused by the contact sensing signal, and there is energy consumption in the environment, so the amplitude of the electromagnetic resonance signal is smaller than the amplitude of the contact sensing signal. In addition, the farther away from the position of the contact point, the more energy consumption, and the smaller the amplitude. It can be clearly understood that the first peak value in the first analytical expression is equivalent or approximately equivalent to the amplitude component of the contact sensing signal in the first direction, and the second peak value in the second analytical expression is equivalent or approximately equivalent to the amplitude component of the contact sensing signal in the second direction. Therefore, in some embodiments of the present application, the first positioning coordinate corresponding to the first peak value in the first analytical expression is the mapping coordinate value of the contact point position in the first direction, and the second positioning coordinate corresponding to the second peak value in the second analytical expression is the mapping coordinate value of the contact point position in the second direction. Since the first direction and the second direction are not collinear, the contact point position of the electromagnetic pen and the input region can be determined based on the first positioning coordinate and the second positioning coordinate, and the contact position information can be obtained. It should be noted that since there is a gap between each electromagnetic transceiver coil of the touch panel, if the position corresponding to the maximum value is directly taken from each transceiver coil, the contact position information corresponding to the position of the contact point in the gap cannot be accurately determined. Therefore, the first positioning coordinate and the second positioning coordinate are determined from the first analytical expression and the second analytical expression, and the contact position information obtained from the first positioning coordinate and the second positioning coordinate is more accurate.

[0101] Referring to Figure 7 According to the second aspect of the present application, an electromagnetic touch device 700 includes a touch panel 720, an electromagnetic pen 710, and an electromagnetic transceiver coil 722 inside the input region 721 of the touch panel 720. The touch panel 720 further includes:

[0102] A detection module 723 is configured to transmit a scanning current from the transmitting end of the electromagnetic transceiver coil 722 to the input region 721. When the scanning current returns to the receiving end of the electromagnetic transceiver coil 722, a contact sensing electromagnetic field is formed, and the electromagnetic resonance signal formed when the electromagnetic pen 710 contacts the input region 721 is detected based on the contact sensing electromagnetic field.

[0103] A data processing module 724 is configured to analyze the electromagnetic resonance signal and obtain contact position information, and obtain input data input via the electromagnetic touch device 700 based on the contact position information. The contact position information reflects the position of the contact point between the electromagnetic pen 710 and the input region 721.

[0104] It should be noted that the electromagnetic touch input method in some embodiments of the present application is applied to the electromagnetic touch device 700, and based on the analysis of the electromagnetic resonance signal by the data processing module 724, the contact position information between the electromagnetic pen 710 and the input area 721 is accurately determined, thereby improving the accuracy of the electromagnetic touch input.

[0105] According to some embodiments of the present application, the electromagnetic transceiving coil 722 is arranged in a staggered manner along a first direction and a second direction in the input area 721 in a single-coil wiring mode, to form a contact-induced electromagnetic field, the first direction and the second direction are not collinear.

[0106] It should be noted that the scanning current is output from the delivery end of the electromagnetic transceiving coil 722, and is returned to the receiving end of the electromagnetic transceiving coil 722 after passing through the wiring path of the electromagnetic transceiving coil 722. During the process of turning on the scanning current, a contact-induced electromagnetic field is formed based on the magnetic effect of the scanning current. According to some embodiments provided by the present application, the input area 721 of the touchpad 720 is paved with electromagnetic transceiving coils 722, which can be uniformly arranged in the input area 721 at intervals, or can be arranged in the input area 721 according to a pre-set interval distance. It should be understood that the electromagnetic transceiving coils 722 paved in the input area 721 of the touchpad 720 are used to form a contact-induced electromagnetic field, and therefore the paving mode of the electromagnetic transceiving coils 722 includes but is not limited to the specific embodiments mentioned above. In some preferred embodiments of the present application, the electromagnetic transceiving coils 722 can be arranged in at least two directions inside the input area 721, to more accurately obtain the contact position information.

[0107] Figure 8 An electronic device 800 provided by an embodiment of the present application is shown. The electronic device 800 includes a processor 801, a memory 802, and a computer program stored in the memory 802 and executable on the processor 801, and the computer program is used to execute the electromagnetic touch input method described above when executed.

[0108] The processor 801 and the memory 802 can be connected by a bus or other means.

[0109] The memory 802 is a non-transitory computer readable storage medium, which can be used to store non-transitory software programs and non-transitory computer executable programs, such as the electromagnetic touch input method described in the embodiments of the present application. The processor 801 executes the non-transitory software programs and instructions stored in the memory 802, thereby realizing the electromagnetic touch input method described above.

[0110] The memory 802 can include a program storage area and a data storage area. The program storage area can store an operating system and at least one application program required by at least one function. The data storage area can store data required for executing the above-described electromagnetic touch input method. In addition, the memory 802 can include a high-speed random access memory, and can also include a non-transitory memory such as at least one storage device, a flash memory device, or other non-transitory solid-state memory device. In some embodiments, the memory 802 can optionally include a memory 802 disposed remotely from the processor 801, which can be connected to the electronic device 800 through a network. Examples of the above-described network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0111] The non-transitory software programs and instructions required for implementing the above-described electromagnetic touch input method are stored in the memory 802, and when executed by the one or more processors 801, the above-described electromagnetic touch input method is executed, for example, the method steps S101 to S105 in Figure 1 , the method steps S201 to S202 in Figure 2 , the method steps S301 to S303 in Figure 3 , the method steps S401 to S403 in Figure 4 , the method steps S501 to S503 in Figure 5 , and the method steps S601 to S603 in Figure 6 .

[0112] The embodiments of the present application also provide a computer readable storage medium storing computer executable instructions for executing the above-described electromagnetic touch input method.

[0113] In an embodiment, the computer readable storage medium stores computer executable instructions which are executed by one or more control processors, for example, the method steps S101 to S105 in Figure 1 , the method steps S201 to S202 in Figure 2 , the method steps S301 to S303 in Figure 3 , the method steps S401 to S403 in Figure 4 , the method steps S501 to S503 in Figure 5 , and the method steps S601 to S603 in Figure 6 .

[0114] The apparatus embodiments described above are only exemplary and the units described as separate components can or can not be physically separate, i.e. can be located in one place, or can be distributed over a plurality of network units. Some or all of the modules can be selected according to actual needs to achieve the purposes of the embodiments.

[0115] Those of ordinary skill in the art will appreciate that all or some of the steps, systems, and / or processes disclosed herein can be embodied in, for example, software, firmware, hardware, or any suitable combination thereof. Some or all of the physical components may, for example, be implemented with software executed by a processor, or hardware, or a combination of software and hardware. Such software may, for example, be distributed over one or more computer-readable media, such as computer storage media (or non-transitory media), and communication media (or transitory media). Computer storage media, as used herein, includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Further, it should be appreciated that a "computer readable medium" or "computer storage medium" can be any available medium or means of storing data that is accessible by a computer. Also, various embodiments of the application are described herein with reference to acts and symbolic representations of operations (e.g., in the form of flowcharts) that can be implemented as program modules or functional processes including routines, programs, objects, components, data structures, etc., that perform particular tasks or implement particular abstract data types. As such, it should be understood that operations can have been described herein as transitory or non-transitory operations, in terms of being implemented as software or hardware, with the understanding that one of ordinary skill in the art would understand whether an operation is implemented as hardware or software, regardless of being described as a transitory or non-transitory operation. It should also be understood that the various embodiments of the application can be implemented in any of a variety of ways.

[0116] The above is a specific description of the preferred embodiments of the present application, but the present application is not limited to the above-described embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present application, and these equivalent modifications or replacements are included in the scope defined by the claims of the present application.

Claims

1. An electromagnetic touch input method applied to an electromagnetic touch device, characterized in that, The electromagnetic touch device comprises a touchpad and an electromagnetic pen, an electromagnetic transmitting-receiving coil is laid in the input area of the touchpad, and the method comprises the following steps: a scanning current is transmitted from the transmitting end of the electromagnetic transmitting-receiving coil to the input area; a contact-induced electromagnetic field is formed when the scanning current returns to the receiving end of the electromagnetic transmitting-receiving coil; global scanning is performed based on the contact-induced electromagnetic field, and a contact-induced signal is generated by the contact-induced electromagnetic field when the electromagnetic pen contacts the input area; an electromagnetic resonance signal is obtained based on the electromagnetic transmitting-receiving coil, the electromagnetic resonance signal is formed by diffusion of the contact-induced signal in the contact-induced electromagnetic field from the contact point, wherein the electromagnetic resonance signal comprises a first type of resonance signal and a second type of resonance signal; first amplitude signal strength data is determined according to the first type of resonance signal, the first amplitude signal strength data reflects the amplitude variation trend of the contact-induced signal in the first direction of the contact-induced electromagnetic field; second amplitude signal strength data is determined according to the second type of resonance signal, the second amplitude signal strength data reflects the amplitude variation trend of the contact-induced signal in the second direction of the contact-induced electromagnetic field, and the first direction is not collinear with the second direction; contact position information is obtained based on the first amplitude signal strength data and the second amplitude signal strength data, wherein the contact position information reflects the position of the contact point between the electromagnetic pen and the input area; input data input via the electromagnetic touch device is obtained based on the contact position information.

2. The method of claim 1, wherein, The first amplitude signal strength data comprises a first analytical expression, and the determination of the first amplitude signal strength data according to the first type of resonance signal comprises the following steps: a plurality of first type sampling points are selected in the first direction, and first type sampling coordinates of the plurality of first type sampling points are obtained; a plurality of first type sampling amplitudes corresponding to the plurality of first type sampling coordinates are obtained from the first type of resonance signal based on the plurality of first type sampling coordinates; the first analytical expression is obtained according to the plurality of first type sampling coordinates and the plurality of first type sampling amplitudes.

3. The method of claim 2, wherein, The second amplitude signal strength data comprises a second analytical expression, and the determination of the second amplitude signal strength data according to the second type of resonance signal comprises the following steps: a plurality of second type sampling points are selected in the second direction, and second type sampling coordinates of the plurality of second type sampling points are obtained; a plurality of second type sampling amplitudes corresponding to the plurality of second type sampling coordinates are obtained from the second type of resonance signal based on the plurality of second type sampling coordinates; the second analytical expression is obtained according to the plurality of second type sampling coordinates and the plurality of second type sampling amplitudes.

4. The method of claim 3, wherein, The obtaining of the contact position information based on the first amplitude signal strength data and the second amplitude signal strength data comprises the following steps: a first positioning coordinate corresponding to a first peak value in the first analytical expression is obtained based on the first analytical expression; a second positioning coordinate corresponding to a second peak value in the second analytical expression is obtained based on the second analytical expression; According to the first positioning coordinate and the second positioning coordinate, the contact position information is acquired.

5. An electromagnetic touch control device, characterized in that, The electromagnetic touch input method comprises the following steps: The detection module is configured to transmit a scanning current from a transmitting end of the electromagnetic transceiving coil to the input area, form a contact-induced electromagnetic field when the scanning current returns to a receiving end of the electromagnetic transceiving coil, and perform global scanning based on the contact-induced electromagnetic field, wherein the contact-induced electromagnetic field generates a contact-induced signal when the electromagnetic pen contacts the input area; acquire an electromagnetic resonance signal based on the electromagnetic transceiving coil, wherein the electromagnetic resonance signal is formed by diffusion of the contact-induced signal from a contact point in the contact-induced electromagnetic field; and the electromagnetic resonance signal comprises a first type of resonance signal and a second type of resonance signal. The data processing module is configured to determine first amplitude signal strength data based on the first type of resonance signal, determine second amplitude signal strength data based on the second type of resonance signal, acquire contact position information based on the first amplitude signal strength data and the second amplitude signal strength data, and acquire input data input via the electromagnetic touch input device based on the contact position information; wherein the first amplitude signal strength data reflects a change trend of an amplitude of the contact-induced signal in a first direction of the contact-induced electromagnetic field, the second amplitude signal strength data reflects a change trend of an amplitude of the contact-induced signal in a second direction of the contact-induced electromagnetic field, the first direction is not collinear with the second direction, and the contact position information reflects a position of a contact point between the electromagnetic pen and the input area. 6.The electromagnetic touch device of claim 5, wherein, The electromagnetic transceiving coil is arranged in a single-coil wiring manner along a first direction and a second direction in the input area, wherein the first direction is not collinear with the second direction, and the electromagnetic transceiving coil is arranged to form the contact-induced electromagnetic field.

7. An electronic device, comprising: The electromagnetic touch input method comprises the following steps: The memory stores a computer program, and the processor executes the computer program to implement the electromagnetic touch input method according to any one of claims 1 to 4.

8. A computer-readable storage medium, characterized in that, The storage medium stores a program, and the program is executed by the processor to implement the electromagnetic touch input method according to any one of claims 1 to 4.

Images