CN117492591A - Touch point positioning method and device, electronic equipment and touch screen - Google Patents
Touch point positioning method and device, electronic equipment and touch screen Download PDFInfo
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- CN117492591A CN117492591A CN202311583289.XA CN202311583289A CN117492591A CN 117492591 A CN117492591 A CN 117492591A CN 202311583289 A CN202311583289 A CN 202311583289A CN 117492591 A CN117492591 A CN 117492591A
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- 238000000034 method Methods 0.000 title claims abstract description 53
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000011521 glass Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 8
- 238000004891 communication Methods 0.000 description 6
- 238000004590 computer program Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000000802 evaporation-induced self-assembly Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0447—Position sensing using the local deformation of sensor cells
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
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Abstract
The invention discloses a touch point positioning method, a touch point positioning device, electronic equipment and a touch screen, wherein the touch point positioning method comprises the following steps: acquiring a capacitance value between a driving electrode and a corresponding receiving electrode; determining a target electrode with the largest capacitance value change according to the relation between the capacitance value and a preset capacitance value; and sequentially taking each electrode of the target first scanning structure corresponding to the target electrode as a first updating driving electrode, taking the electrodes of the target first scanning structure except for the updating driving electrode as a first updating receiving electrode, scanning a capacitance value, taking each electrode of the target second scanning structure corresponding to the target electrode as a second updating driving electrode, taking the electrodes of the second scanning structure except for the second updating driving electrode as a second updating receiving electrode, scanning the capacitance value, and determining two electrode pairs with the largest change of multiple groups of capacitance values, thereby determining the position of a touch point. According to the method, the positions of the touch points are determined through a plurality of groups of two electrode pairs with the largest capacitance value change, so that the positioning accuracy of touch coordinates is improved.
Description
Technical Field
The present invention relates to the field of touch screens, and in particular, to a touch point positioning method and apparatus, an electronic device, and a touch screen.
Background
At present, capacitive touch is commonly applied in the touch industry, and detection and application of touch are realized by utilizing the principle that a capacitance value is reduced when a conductor contacts the surface of a touch screen. However, since the electrode absorbs a part of the capacitance when the conductor contacts the touch screen surface, the signal conducted to the receiving end becomes weak. The capacitance nodes are spaced, so that after a finger or a capacitance pen touches the touch screen, capacitance value changes of a plurality of capacitors in an area are formed on the touch screen, and the accuracy of the current touch point positioning method is poor.
Disclosure of Invention
The invention aims to provide a touch point positioning method, a device, electronic equipment and a touch screen, so as to solve the technical problem that the existing touch point positioning method is poor in precision due to the fact that capacitance values of a plurality of capacitors in an area are changed on the touch screen after a finger or a capacitance pen performs touch control on the touch screen, and improve the precision of touch point positioning.
In a first aspect, an embodiment of the present invention provides a touch point positioning method, which is applied to a touch screen; the touch screen is provided with a preset number of driving electrodes and receiving electrodes adjacent to the driving electrodes; the driving electrode and the corresponding receiving electrode form a first scanning structure of an equilateral octagon; a second equilateral quadrilateral scanning structure is formed between the equilateral octagonal scanning structures; the method comprises the following steps: acquiring a capacitance value between the driving electrode and the corresponding receiving electrode; determining a target electrode with the largest capacitance value change from the first scanning structure according to the relation between the capacitance value and a preset capacitance value; sequentially taking each electrode of a target first scanning structure corresponding to the target electrode as a first updating driving electrode, taking other electrodes of the target first scanning structure except the updating driving electrode as first updating receiving electrodes, scanning capacitance values, taking each electrode of a target second scanning structure corresponding to the target electrode as a second updating driving electrode, taking other electrodes of the second scanning structure except the second updating driving electrode as second updating receiving electrodes, scanning capacitance values, and determining two electrode pairs with the largest change of multiple groups of capacitance values; and determining the position of the touch point according to the two electrode pairs with the largest change of the multiple groups of capacitance values.
In a preferred embodiment of the present invention, the step of determining the position of the touch point according to the two electrode pairs with the largest change in the capacitance values includes: connecting the two electrode pairs with the largest capacitance value change in each group respectively to obtain an intersection point set of the connecting lines of the electrode pairs; and determining the position of the touch point according to the intersection point set and the signal difference degree corresponding to the intersection point set.
In a preferred embodiment of the present invention, before the step of determining the position of the touch point according to the intersection set and the signal difference degree corresponding to the intersection set, the method includes: the capacitance measured values of the connecting lines of the plurality of groups of electrode pairs are subjected to difference with a preset standard value to obtain a plurality of difference values; and calculating the ratio of the plurality of difference values to the preset standard value, and determining the signal difference degree corresponding to the intersection point set.
In a preferred embodiment of the present invention, the step of determining the position of the touch point according to the intersection set and the signal difference corresponding to the intersection set includes: multiplying the coordinates of the intersection point set by the signal difference degrees corresponding to the intersection point set to obtain a plurality of updated coordinates; and determining the position of the touch point according to the plurality of updated coordinates.
In a preferred embodiment of the present invention, the step of determining the position of the touch point according to the plurality of updated coordinates includes: calculating an average value of the plurality of updated coordinates; and determining an average value of the plurality of updated coordinates as a position of the touch point.
In a preferred embodiment of the present invention, before the step of determining the target electrode with the largest capacitance change according to the relationship between the capacitance and the preset capacitance, the method includes: acquiring a capacitance value of the driving electrode of the touch screen in a non-touch state; and determining the capacitance value of the driving electrode in the non-touch state as the preset capacitance value.
In a second aspect, the embodiment of the invention also provides a touch point positioning device, which is applied to a touch screen; the touch screen is provided with a preset number of driving electrodes and receiving electrodes adjacent to the driving electrodes; the driving electrode and the corresponding receiving electrode form a first scanning structure of an equilateral octagon; a second equilateral quadrilateral scanning structure is formed between the equilateral octagonal scanning structures; the device comprises: the data acquisition module is used for acquiring the capacitance value between the driving electrode and the corresponding receiving electrode; the target electrode determining module is used for determining a target electrode with the largest capacitance value change from the first scanning structure according to the magnitude relation between the capacitance value and a preset capacitance value; a scanning module, configured to sequentially use each electrode of a target first scanning structure corresponding to the target electrode as a first update driving electrode, use other electrodes of the target first scanning structure except the update driving electrode as a first update receiving electrode, perform scanning of capacitance values, use each electrode of a target second scanning structure corresponding to the target electrode as a second update driving electrode, use other electrodes of the second scanning structure except the second update driving electrode as a second update receiving electrode, perform scanning of capacitance values, and determine two electrode pairs with largest changes in multiple groups of capacitance values; and the positioning module is used for determining the position of the touch point according to the two electrode pairs with the largest change of the multiple groups of capacitance values.
In a third aspect, an embodiment of the present invention further provides an electronic device, where the electronic device includes a processor and a memory, where the memory stores computer-executable instructions that can be executed by the processor, and the processor executes the computer-executable instructions to implement the touch point positioning method.
In a fourth aspect, an embodiment of the present invention further provides a touch screen, including the above electronic device, further including: an electrode connected to the electronic device and an ADC conversion circuit; the electrode is used for acquiring a touch signal; the ADC conversion circuit is used for converting the touch signal into a digital signal.
In a preferred embodiment of the present invention, the touch screen further includes: and a glass cover plate and a shell which are covered on the electronic equipment.
The embodiment of the invention has the following beneficial technical effects:
the touch point positioning method, the touch point positioning device, the electronic equipment and the touch screen are applied to the touch screen; the touch screen is provided with a preset number of driving electrodes and receiving electrodes adjacent to the driving electrodes; the driving electrode and the corresponding receiving electrode form a first scanning structure of an equilateral octagon; a second equilateral quadrilateral scanning structure is formed between the equilateral octagonal scanning structures; the method comprises the following steps: acquiring a capacitance value between the driving electrode and the corresponding receiving electrode; determining a target electrode with the largest capacitance value change from the first scanning structure according to the relation between the capacitance value and a preset capacitance value; sequentially taking each electrode of a target first scanning structure corresponding to the target electrode as a first updating driving electrode, taking other electrodes of the target first scanning structure except the updating driving electrode as first updating receiving electrodes, scanning capacitance values, taking each electrode of a target second scanning structure corresponding to the target electrode as a second updating driving electrode, taking other electrodes of the second scanning structure except the second updating driving electrode as second updating receiving electrodes, scanning capacitance values, and determining two electrode pairs with the largest change of multiple groups of capacitance values; and determining the position of the touch point according to the two electrode pairs with the largest change of the multiple groups of capacitance values. According to the method, the positions of the touch points are determined through a plurality of groups of two electrode pairs with the largest capacitance value change, so that the positioning accuracy of touch coordinates is improved.
Additional features and advantages of the present embodiments will be set forth in the description which follows, or in part will be obvious from the description, or may be learned by practice of the techniques of the present disclosure.
The foregoing objects, features and advantages of the disclosure will be more readily apparent from the following detailed description of the preferred embodiments taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a touch point positioning method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a first scanning structure and a second scanning structure according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a touch point positioning device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a touch screen according to an embodiment of the present invention.
Icon: 11-a first scanning structure; 12-a second scanning structure; 31-a data acquisition module; a 32-target electrode determination module; 33-a scanning module; 34-a positioning module; 41-memory; 42-a processor; 43-bus; 44-a communication interface; 51-an electronic device; 52-electrode; 53-ADC conversion circuits.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
At present, capacitive touch is commonly applied in the touch industry, and detection and application of touch are realized by utilizing the principle that a capacitance value is reduced when a conductor contacts the surface of a touch screen. However, since the electrode absorbs a part of the capacitance when the conductor contacts the touch screen surface, the signal conducted to the receiving end becomes weak. The capacitance nodes are spaced, so that after a finger or a capacitance pen touches the touch screen, capacitance value changes of a plurality of capacitors in an area are formed on the touch screen, and the accuracy of the current touch point positioning method is poor.
Based on the above, the embodiment of the invention provides a touch point positioning method, a device, electronic equipment and a touch screen. For the convenience of understanding the embodiments of the present invention, a touch point positioning method disclosed in the embodiments of the present invention will be described in detail first.
Example 1
Fig. 1 is a flow chart of a touch point positioning method according to an embodiment of the present invention. The method is applied to the touch screen; the touch screen is provided with a preset number of driving electrodes and receiving electrodes adjacent to the driving electrodes; the driving electrode and the corresponding receiving electrode form a first scanning structure 11 of an equilateral octagon; a second equilateral octagonal scanning structure 12 is formed between the equilateral octagonal scanning structures; the method comprises the following steps:
step S101: and acquiring a capacitance value between the driving electrode and the corresponding receiving electrode.
Step S102: and determining a target electrode with the largest capacitance value change from the first scanning structure according to the capacitance value and the preset capacitance value.
In this embodiment, since the touch position may be located in the first scanning structure 11 or the second scanning structure 12, the following step S103 is performed.
Further, before step S102, the method includes: firstly, the capacitance value of the driving electrode of the touch screen in a non-touch state is obtained. And then, determining the capacitance value of the driving electrode in the non-touch state as the preset capacitance value.
Step S103: and scanning capacitance values by taking each electrode of a target first scanning structure corresponding to the target electrode as a first updating driving electrode, taking other electrodes of the target first scanning structure except the updating driving electrode as first updating receiving electrodes, taking each electrode of a target second scanning structure corresponding to the target electrode as a second updating driving electrode, taking other electrodes of the second scanning structure except the second updating driving electrode as second updating receiving electrodes, and determining two electrode pairs with the largest change of the capacitance values.
Here, the two electrodes of each of the two electrode pairs having the largest capacitance value change correspond to the two electrode pairs having the largest capacitance value change in the target first scanning structure and the target second scanning structure, respectively.
Step S104: and determining the position of the touch point according to the two electrode pairs with the largest change of the multiple groups of capacitance values.
For ease of understanding, fig. 2 is a schematic structural diagram of a first scanning structure and a second scanning structure according to an embodiment of the present invention. The reason for this arrangement of the scanning structure is that the scan area is the same but the scan points are reduced, and the scan time can be greatly shortened to achieve a fast scan.
Further, the step S104 includes the following steps A1 to A2:
step A1: and respectively connecting the two electrode pairs with the largest capacitance value change of each group to obtain a junction set of connecting the electrode pairs.
Step A2: and determining the position of the touch point according to the intersection point set and the signal difference degree corresponding to the intersection point set.
In one embodiment, before the step A2, the method includes: the capacitance measured values of the connecting lines of the plurality of groups of electrode pairs are subjected to difference with a preset standard value to obtain a plurality of difference values; and calculating the ratio of the plurality of difference values to the preset standard value, and determining the signal difference degree corresponding to the intersection point set.
In one embodiment, the step A2 includes: multiplying the coordinates of the intersection point set by the signal difference degrees corresponding to the intersection point set to obtain a plurality of updated coordinates; and determining the position of the touch point according to the plurality of updated coordinates.
Here, the step of determining the position of the touch point according to the plurality of updated coordinates includes: first, an average of a plurality of updated coordinates is calculated. Then, an average value of the plurality of updated coordinates is determined as the position of the touch point.
The touch point positioning method provided by the embodiment of the invention is applied to a touch screen; the touch screen is provided with a preset number of driving electrodes and receiving electrodes adjacent to the driving electrodes; the driving electrode and the corresponding receiving electrode form a first scanning structure of an equilateral octagon; a second equilateral quadrilateral scanning structure is formed between the equilateral octagonal scanning structures; the method comprises the following steps: acquiring a capacitance value between the driving electrode and the corresponding receiving electrode; determining a target electrode with the largest capacitance value change from the first scanning structure according to the relation between the capacitance value and a preset capacitance value; sequentially taking each electrode of a target first scanning structure corresponding to the target electrode as a first updating driving electrode, taking other electrodes of the target first scanning structure except the updating driving electrode as first updating receiving electrodes, scanning capacitance values, taking each electrode of a target second scanning structure corresponding to the target electrode as a second updating driving electrode, taking other electrodes of the second scanning structure except the second updating driving electrode as second updating receiving electrodes, scanning capacitance values, and determining two electrode pairs with the largest change of multiple groups of capacitance values; and determining the position of the touch point according to the two electrode pairs with the largest change of the multiple groups of capacitance values. According to the method, the positions of the touch points are determined through a plurality of groups of two electrode pairs with the largest capacitance value change, so that the positioning accuracy of touch coordinates is improved.
Example 2
Fig. 3 is a schematic structural diagram of a touch point positioning device according to an embodiment of the present invention. The touch screen is provided with a preset number of driving electrodes and receiving electrodes adjacent to the driving electrodes; the driving electrode and the corresponding receiving electrode form a first scanning structure of an equilateral octagon; a second equilateral quadrilateral scanning structure is formed between the equilateral octagonal scanning structures; the device comprises:
and a data acquisition module 31, configured to acquire a capacitance value between the driving electrode and the corresponding receiving electrode.
The target electrode determining module 32 is configured to determine, from the first scanning structure, a target electrode with a largest capacitance value change according to the capacitance value and a preset capacitance value.
The scanning module 33 is configured to sequentially perform scanning of capacitance values using each electrode of a target first scanning structure corresponding to the target electrode as a first update driving electrode, using other electrodes of the target first scanning structure except the update driving electrode as a first update receiving electrode, and performing scanning of capacitance values using each electrode of a target second scanning structure corresponding to the target electrode as a second update driving electrode, using other electrodes of the second scanning structure except the second update driving electrode as a second update receiving electrode, and determining two electrode pairs with the largest change in capacitance values.
And the positioning module 34 is configured to determine the position of the touch point according to the two electrode pairs with the largest changes of the multiple groups of capacitance values.
The data acquisition module 31, the target electrode determination module 32, the scanning module 33, and the positioning module 34 are sequentially connected.
In one embodiment, the positioning module 34 is further configured to connect two electrode pairs with the largest capacitance value change in each group to each other, so as to obtain an intersection set of the connection lines of the electrode pairs; and determining the position of the touch point according to the intersection point set and the signal difference degree corresponding to the intersection point set.
In one embodiment, the positioning module 34 is further configured to perform a difference between the capacitance measurement values of the connection lines of the plurality of groups of electrode pairs and a preset standard value to obtain a plurality of difference values; and calculating the ratio of the plurality of difference values to the preset standard value, and determining the signal difference degree corresponding to the intersection point set.
In one embodiment, the positioning module 34 is further configured to multiply the coordinates of the intersection set with the signal difference degrees corresponding to the intersection set to obtain a plurality of updated coordinates; and determining the position of the touch point according to the plurality of updated coordinates.
In one embodiment, the positioning module 34 is further configured to calculate an average value of the plurality of updated coordinates; and determining an average value of the plurality of updated coordinates as a position of the touch point.
In one embodiment, the data obtaining module 31 is further configured to obtain a capacitance value of the driving electrode of the touch screen in a non-touch state; and determining the capacitance value of the driving electrode in the non-touch state as the preset capacitance value.
The touch point positioning device provided by the embodiment of the invention has the same technical characteristics as the touch point positioning method provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved. It will be clear to those skilled in the art that, for convenience and brevity of description, reference may be made to the corresponding process in the foregoing method embodiment for the specific working process of the apparatus described above, which is not described herein again.
Example 3
The present embodiment provides an electronic device including a processor and a memory storing computer-executable instructions executable by the processor to perform steps of a touch point positioning method.
The present embodiment provides a computer-readable storage medium in which a computer program is stored which, when executed by a processor, implements the steps of a touch point positioning method.
Referring to fig. 4, a schematic structural diagram of an electronic device includes: a memory 41, and a processor 42, wherein the memory 41 stores a computer program executable on the processor 42, and the processor implements the steps provided by the touch point positioning method when executing the computer program.
As shown in fig. 4, the apparatus further includes: a bus 43 and a communication interface 44, the processor 42, the communication interface 44 and the memory 41 being connected by the bus 43; the processor 42 is arranged to execute executable modules, such as computer programs, stored in the memory 41.
The memory 41 may include a high-speed random access memory (RAM, random Access Memory), and may further include a non-volatile memory (non-volatile memory), such as at least one magnetic disk memory. The communication connection between the system network element and at least one other network element is implemented via at least one communication interface 44 (which may be wired or wireless), which may use the internet, a wide area network, a local network, a metropolitan area network, etc.
The bus 43 may be an ISA bus, a PCI bus, an EISA bus, or the like. The buses may be divided into address buses, data buses, control buses, etc. For ease of illustration, only one bi-directional arrow is shown in FIG. 4, but not only one bus or type of bus.
The memory 41 is used for storing a program, and the processor 42 executes the program after receiving an execution instruction, and any of the embodiments of the present invention described above reveals that the method executed by the dual touch positioning apparatus can be applied to the processor 42 or implemented by the processor 42. The processor 42 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuitry in hardware or instructions in software in the processor 42. The processor 42 may be a general-purpose processor, including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; but may also be a digital signal processor (Digital Signal Processing, DSP for short), application specific integrated circuit (Application Specific Integrated Circuit, ASIC for short), off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA for short), or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory 41 and a processor 42 reads information in the memory 41 and in combination with its hardware performs the steps of the method described above.
Further, embodiments of the present invention also provide a machine-readable storage medium storing machine-executable instructions that, when invoked and executed by the processor 42, cause the processor 42 to implement the touch point location method described above.
The electronic equipment and the computer readable storage medium provided by the embodiment of the invention have the same technical characteristics, so that the same technical problems can be solved, and the same technical effects can be achieved.
Example 4
Fig. 5 is a schematic structural diagram of a touch screen according to an embodiment of the present invention.
As seen in fig. 5, the touch screen includes: the electronic device 51 in the above embodiment further includes: an electrode 52 connected to the electronic device 51 and an ADC conversion circuit 53.
Here, the electrode 52 is used for acquiring a touch signal; the ADC conversion circuit 53 is configured to convert the touch signal into a digital signal.
Further, the touch screen further includes: a glass cover and a case covering the electronic device 51.
In addition, in the description of embodiments of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Claims (10)
1. The touch point positioning method is characterized by being applied to a touch screen; the touch screen is provided with a preset number of driving electrodes and receiving electrodes adjacent to the driving electrodes; the driving electrode and the corresponding receiving electrode form a first scanning structure of an equilateral octagon; a second equilateral quadrilateral scanning structure is formed between the equilateral octagonal scanning structures; the method comprises the following steps:
acquiring a capacitance value between the driving electrode and the corresponding receiving electrode;
determining a target electrode with the largest capacitance value change from the first scanning structure according to the relation between the capacitance value and a preset capacitance value;
taking each electrode of a target first scanning structure corresponding to the target electrode as a first updating driving electrode, taking other electrodes of the target first scanning structure except for the updating driving electrode as first updating receiving electrodes, scanning capacitance values, taking each electrode of a target second scanning structure corresponding to the target electrode as a second updating driving electrode, taking other electrodes of the second scanning structure except for the second updating driving electrode as second updating receiving electrodes, scanning capacitance values, and determining two electrode pairs with the largest change of multiple groups of capacitance values;
and determining the position of the touch point according to the two electrode pairs with the largest change of the multiple groups of capacitance values.
2. The method of locating a touch point according to claim 1, wherein the step of determining the location of the touch point from the plurality of pairs of electrodes having the largest change in capacitance value comprises:
connecting the two electrode pairs with the largest capacitance value change in each group respectively to obtain an intersection point set of the connecting lines of the electrode pairs;
and determining the position of the touch point according to the intersection point set and the signal difference degree corresponding to the intersection point set.
3. The method for locating a touch point according to claim 2, wherein before the step of determining the location of the touch point according to the intersection set and the signal difference corresponding to the intersection set, the method comprises:
the capacitance measured values of the connecting lines of the plurality of groups of electrode pairs are subjected to difference with a preset standard value to obtain a plurality of difference values;
and calculating the ratio of the plurality of difference values to the preset standard value, and determining the signal difference degree corresponding to the intersection point set.
4. The touch point positioning method according to claim 2, wherein the step of determining the position of the touch point according to the intersection set and the signal difference corresponding to the intersection set includes:
multiplying the coordinates of the intersection point set by the signal difference degrees corresponding to the intersection point set to obtain a plurality of updated coordinates;
and determining the position of the touch point according to the plurality of updated coordinates.
5. The touch point positioning method according to claim 4, wherein the step of determining the position of the touch point based on the plurality of updated coordinates comprises:
calculating an average value of the plurality of updated coordinates;
and determining an average value of the plurality of updated coordinates as a position of the touch point.
6. The touch point positioning method according to claim 1, wherein before the step of determining the target electrode having the largest capacitance change according to the magnitude relation between the capacitance value and the preset capacitance value, the method comprises:
acquiring a capacitance value of the driving electrode of the touch screen in a non-touch state;
and determining the capacitance value of the driving electrode in the non-touch state as the preset capacitance value.
7. The touch point positioning device is characterized by being applied to a touch screen; the touch screen is provided with a preset number of driving electrodes and receiving electrodes adjacent to the driving electrodes; the driving electrode and the corresponding receiving electrode form a first scanning structure of an equilateral octagon; a second equilateral quadrilateral scanning structure is formed between the equilateral octagonal scanning structures; the device comprises:
the data acquisition module is used for acquiring a capacitance value between the driving electrode and the corresponding receiving electrode;
the target electrode determining module is used for determining a target electrode with the largest capacitance value change from the first scanning structure according to the magnitude relation between the capacitance value and a preset capacitance value;
the scanning module is used for sequentially taking each electrode of a target first scanning structure corresponding to the target electrode as a first updating driving electrode, taking other electrodes of the target first scanning structure except the updating driving electrode as first updating receiving electrodes, scanning capacitance values, taking each electrode of a target second scanning structure corresponding to the target electrode as a second updating driving electrode, taking other electrodes of the second scanning structure except the second updating driving electrode as second updating receiving electrodes, scanning capacitance values, and determining a plurality of groups of two electrode pairs with the largest capacitance value change;
and the positioning module is used for determining the position of the touch point according to the two electrode pairs with the largest change of the multiple groups of capacitance values.
8. An electronic device comprising a processor and a memory, the memory storing computer-executable instructions executable by the processor, the processor executing the computer-executable instructions to implement the touch point location method of any of claims 1-6.
9. A touch screen comprising the electronic device of claim 8, further comprising: an electrode connected to the electronic device and an ADC conversion circuit;
the electrode is used for acquiring a touch signal;
the ADC conversion circuit is used for converting the touch signal into a digital signal.
10. The touch screen of claim 9, further comprising: a glass cover plate and a housing covering the electronic device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311583289.XA CN117492591A (en) | 2023-11-24 | 2023-11-24 | Touch point positioning method and device, electronic equipment and touch screen |
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| CN202311583289.XA CN117492591A (en) | 2023-11-24 | 2023-11-24 | Touch point positioning method and device, electronic equipment and touch screen |
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| CN117492591A true CN117492591A (en) | 2024-02-02 |
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| CN202311583289.XA Pending CN117492591A (en) | 2023-11-24 | 2023-11-24 | Touch point positioning method and device, electronic equipment and touch screen |
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| Country | Link |
|---|---|
| CN (1) | CN117492591A (en) |
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2023
- 2023-11-24 CN CN202311583289.XA patent/CN117492591A/en active Pending
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