CN118034524A - Touch screen, display panel and method for determining touch position - Google Patents

Touch screen, display panel and method for determining touch position Download PDF

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Publication number
CN118034524A
CN118034524A CN202410234507.7A CN202410234507A CN118034524A CN 118034524 A CN118034524 A CN 118034524A CN 202410234507 A CN202410234507 A CN 202410234507A CN 118034524 A CN118034524 A CN 118034524A
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China
Prior art keywords
electrode
target
electrodes
group
electrode group
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Chinese (zh)
Inventor
黄佩迪
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Chongqing HKC Optoelectronics Technology Co Ltd
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Chongqing HKC Optoelectronics Technology Co Ltd
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Priority to CN202410234507.7A priority Critical patent/CN118034524A/en
Publication of CN118034524A publication Critical patent/CN118034524A/en
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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
    • 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
    • G06F3/0412—Digitisers structurally integrated in a display
    • 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
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)

Abstract

The application provides a touch screen, a display panel and a method for determining touch positions, wherein the touch screen divides a plurality of rows of first electrodes in a mutual capacitance electrode layer into one or more row electrode groups, and a plurality of columns of second electrodes into one or more column electrode groups; then, a plurality of row electrode groups are connected by a first group of scanning lines, and a plurality of rows of first electrodes in the row electrode groups are commonly connected to the first group of scanning lines; a plurality of column electrode groups are connected by a second group of scanning lines, and a plurality of column second electrodes in the column electrode groups are commonly connected to the second group of scanning lines; and then scanning the row electrode group and the column electrode group, and then scanning a plurality of rows of first electrodes in the target row electrode group and a plurality of rows of second electrodes in the target column electrode group to determine a target first electrode and a target second electrode corresponding to the capacitance variation, thereby finally determining the touch position of the user, reducing the time consumed by scanning row by row and missing touch points caused by too slow scanning, and improving the efficiency of the touch screen in recognizing the touch position.

Description

Touch screen, display panel and method for determining touch position
Technical Field
The invention belongs to the technical field of touch screens, and particularly relates to a touch screen, a display panel and a method for determining a touch position.
Background
The mutual capacitance touch screen adopts Indium-Tin-Oxide (ITO) films to form a transverse electrode array and a longitudinal electrode array, and a mutual capacitance is formed between the transverse electrode and the longitudinal electrode. When a human finger touches the mutual capacitance touch screen, the coupling between two electrodes near the touch point is affected, so that the capacitance between the two electrodes is changed, and the touch position can be determined by detecting the position of the mutual capacitance touch screen where the capacitance changes in the transverse direction and the longitudinal direction line by line. However, when the user touches multiple positions on the screen, it takes a long time to perform the row-by-row detection, which affects the user experience and may even occur a split point.
It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide a touch screen, a display panel and a method for determining a touch position, which are used for solving the problem that the touch position cannot be detected in time.
According to an aspect of an embodiment of the present application, there is provided a touch screen including:
The display layer is used for displaying the received display information;
The mutual capacitance electrode layer is arranged on one side of the display layer for display and used for generating capacitance variation when a user touches the screen; the mutual capacitance electrode layer comprises one or more row electrode groups and one or more column electrode groups; the row electrode group comprises a plurality of rows of first electrodes, and the column electrode group comprises a plurality of columns of second electrodes; the first electrodes and the second electrodes are arranged in a staggered manner, and a mutual capacitance is formed between the first electrodes and the second electrodes;
a first group of scan lines for connecting the plurality of row electrode groups; multiple rows of first electrodes in the row electrode group are commonly connected to a first group of scanning lines;
a second group of scan lines for connecting the plurality of column electrode groups; a plurality of columns of second electrodes in the column electrode group are commonly connected to a second group of scanning lines;
The position determining module is respectively connected with the first group of scanning lines and the second group of scanning lines; the position determining module is used for scanning the row electrode group and the column electrode group to determine a target row electrode group and a target column electrode group corresponding to the capacitance variation; and scanning the first electrode in the target row electrode group and the second electrode in the target column electrode group to determine a target first electrode and a target second electrode corresponding to the capacitance variation.
In one embodiment of the present application, it comprises: a plurality of row scan lines for connecting the first electrodes and the corresponding first group scan lines; and a plurality of column scan lines for connecting the second electrodes and the corresponding second group scan lines.
In one embodiment of the present application, the touch screen includes: in the row electrode group, the first electrodes of the same row have the same thickness, and the first electrodes of different rows have different thicknesses; in the column electrode group, the second electrodes of the same column have the same thickness, and the second electrodes of different columns have different thicknesses.
In one embodiment of the present application, the position determining module is configured to determine, after determining the target row electrode group and the target column electrode group corresponding to the capacitance variation, a target first electrode and a target second electrode corresponding to the capacitance variation according to a correspondence between the first electrodes with different thicknesses in the target row electrode group and the second electrodes with different thicknesses in the target column electrode group and the capacitance variation, so as to determine the touch position.
In one embodiment of the present application, the touch screen includes: in the row electrode group, the first electrodes of the same row have the same size, and the first electrodes of different rows have different sizes; in the column electrode group, the second electrodes of the same column have the same size, and the second electrodes of different columns have different sizes.
In one embodiment of the present application, the position determining module is configured to determine, after determining the target row electrode group and the target column electrode group corresponding to the capacitance variation, a target first electrode and a target second electrode corresponding to the capacitance variation in the touch area according to a correspondence between different sizes of first electrodes in the target row electrode group and different sizes of second electrodes in the target column electrode group and the capacitance variation, so as to determine the touch position.
In one embodiment of the application, the location determination module comprises: the micro control unit is used for generating a control signal and determining a touch position according to the change of the target signals before and after touch; the input end of the first signal processing unit is connected with the output end of the micro-control unit, and the output end of the first signal processing unit is connected with the row electrode group; the first signal processing unit is used for transmitting an excitation signal to the row electrode group according to the control signal; the excitation signal is an analog signal of a preset voltage; the input end of the second signal processing unit is connected with the column electrode group, and the output end of the second signal processing unit is connected with the micro control unit; the second signal processing unit is used for acquiring feedback signals output by the column electrode groups, converting the feedback signals into target signals, and outputting the target signals to the micro control unit for analysis; the voltage variation of the feedback signal corresponds to the capacitance variation of the mutual capacitance between the first electrode and the second electrode.
According to an aspect of an embodiment of the present application, there is provided a method for determining a touch location, which is applied to a touch screen provided in any one embodiment of the present application, the method including:
the control position determining module scans the electrode group and the electrode group to determine a target row electrode group and a target column electrode group corresponding to the capacitance variation;
The control position determining module scans the first electrode in the target row electrode group and the second electrode in the target column electrode group to determine a target first electrode and a target second electrode corresponding to the capacitance variation;
And determining the touch position of the user according to the target first electrode and the target second electrode.
In one embodiment of the present application, the step of determining the target first electrode and the target second electrode corresponding to the capacitance variation includes: determining a target first electrode and a target second electrode corresponding to the capacitance variation according to the corresponding relation between the first electrodes with different thicknesses in the target row electrode group and the second electrodes with different thicknesses in the target column electrode group and the capacitance variation; or determining the target first electrode and the target second electrode corresponding to the capacitance variation in the touch area according to the corresponding relation between the first electrodes with different sizes in the target row electrode group and the second electrodes with different sizes in the target column electrode group and the capacitance variation.
According to an aspect of an embodiment of the present application, there is provided a display panel including: the touch screen provided by any one embodiment of the application; and the display frame is arranged at the side edge of the touch screen and used for protecting the touch screen.
In the technical scheme of the application, a plurality of rows of first electrodes in the mutual capacitance electrode layer are divided into one or a plurality of row electrode groups, and a plurality of columns of second electrodes are divided into one or a plurality of column electrode groups; then, a plurality of row electrode groups are connected by a first group of scanning lines, and a plurality of rows of first electrodes in the row electrode groups are commonly connected to the first group of scanning lines; a plurality of column electrode groups are connected by a second group of scanning lines, and a plurality of column second electrodes in the column electrode groups are commonly connected to the second group of scanning lines; then, the position determining module scans the row electrode groups and the column electrode groups firstly, so that the time consumed by scanning row by row and column by column can be reduced, and the target row electrode groups and the target column electrode groups corresponding to the touch positions can be detected in time; and finally, scanning a plurality of rows of first electrodes in the target row electrode group and a plurality of rows of second electrodes in the target column electrode group to determine a target first electrode and a target second electrode corresponding to the capacitance variation, thereby finally determining the touch position of a user, reducing missing touch points caused by too slow scanning, and improving the efficiency of the touch screen in identifying the touch position.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. It is evident that the drawings in the following description are only some embodiments of the present application and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1 schematically illustrates a structural schematic diagram of a touch screen according to a first embodiment of the present application.
Fig. 2 schematically illustrates a structural schematic diagram of a touch screen according to a second embodiment of the present application.
Fig. 3a schematically shows a side view of a mutual capacitance electrode layer according to a third embodiment of the present application.
Fig. 3b schematically shows a side view of a mutual capacitance electrode layer according to a third embodiment of the present application.
Fig. 4 schematically illustrates a structural diagram of a mutual capacitance electrode layer according to a fourth embodiment of the present application.
Fig. 5 schematically illustrates a structural diagram of a location determining module according to a fifth embodiment of the present application.
Fig. 6 schematically shows a flowchart of a method for determining a touch location according to a sixth embodiment of the present application.
Fig. 7 schematically illustrates a structural diagram of a display panel according to a seventh embodiment of the present application.
FIG. 8 schematically shows a block diagram of a computer system for implementing a touch screen according to an embodiment of the application.
Reference numerals illustrate:
110. A display layer; 120. mutual capacitance electrode layers; 510. a micro control unit; 520. a first signal processing unit; 530. a second signal processing unit; 700. a display panel; 710. a touch screen; 720. displaying a frame; 800. a computer system of a touch screen; 801. a processor; 802. a read-only memory; 803. a random access memory; 804. a bus; 805. an input/output interface; 806. an input section; 807. an output section; 808. a storage section; 809. a communication section; 810. a driver; 811. removable media.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art.
As shown in fig. 1, the present application provides a touch screen, including: a display layer 110 for displaying the received display information, the display information being a digital signal containing a display image; the mutual capacitance electrode layer 120 is disposed on one side of the display layer 110 for displaying, and is used for generating capacitance variation when a user touches the screen. The mutual capacitance electrode layer 120 is a two-layer transparent electrode array formed by using Indium-Tin-Oxide (ITO) film in the transverse and longitudinal directions.
As shown in fig. 2, the mutual capacitance electrode layer includes one or more row electrode groups and one or more column electrode groups; the row electrode group A1 includes a plurality of rows of first electrodes (represented by white boxes in fig. 2), such as A1 row of first electrodes and a2 row of first electrodes, and the column electrode group includes a plurality of columns of second electrodes (represented by striped boxes in fig. 2); the first electrodes and the second electrodes are arranged in a staggered manner, mutual capacitance is formed between the first electrodes and the second electrodes, and mutual capacitance is not formed between electrodes in the same row or the same column; when a human finger touches the mutual capacitive touch screen, coupling between two electrodes near the touch point is affected, thereby changing the capacitance between the two electrodes. The touch screen further includes: a first group of scan lines X for connecting a plurality of row electrode groups; the rows of first electrodes in the row electrode group are commonly connected to the first group of scanning lines X. The touch screen further includes: a second group of scan lines Y for connecting the plurality of column electrode groups; a plurality of columns of second electrodes in the column electrode group are commonly connected to a second group of scanning lines Y; the position determining module 130 is respectively connected with the first group of scanning lines X and the second group of scanning lines Y; the position determining module 130 is configured to scan the row electrode groups A1, A2 and the column electrode group B1 to determine a target row electrode group and a target column electrode group corresponding to the capacitance variation; and scanning the first electrode in the target row electrode group and the second electrode in the target column electrode group to determine a target first electrode and a target second electrode corresponding to the capacitance variation.
Specifically, the position determining module may be a touch chip, which has functions of touch detection and touch control, and may identify a touch position of a user on the touch screen, and feed back the touch position to a processor of the terminal for subsequent display control.
The capacitance variation refers to the capacitance variation of the mutual capacitance between the first electrode and the second electrode, and the current or voltage variation of the row electrode group and the column electrode group in the mutual capacitance electrode layer can be detected by the position determining module 130, wherein the current variation corresponds to the capacitance variation, or the voltage variation corresponds to the capacitance variation.
The two electrode layers of the mutual capacitance electrode layer are respectively grouped, for example, the row electrode group A1 comprises A1 row first electrode and A2 row first electrode, the row electrode group A2 also comprises A1 row first electrode and A2 row first electrode, and although the first electrodes in the two groups of row electrode groups are the same in reference number, the positions of the first electrodes are determined when the positions of the row electrode groups are determined, so that the first electrodes in different row electrode groups can be distinguished. When the position determining module scans, the related art generally scans row by row and column by column, but for industrial scenes or multi-point touch, a lot of time is required to scan row by column, and when the electrode is scanned row by column, if the touch point is located in the electrode which is not scanned yet, the touch point is easy to detect. Therefore, the application can expand the scanning range by scanning the row electrode group and the column electrode group, and can reduce the time for completing one round of scanning by grouping the scanning, thereby improving the efficiency of identifying the touch position.
For example, when the touch screen is in operation, the position determining module 130 sequentially acquires the on-line voltages of the row electrode group A1 and the row electrode group A2 and the on-line voltage of the column electrode group B1, and when the position O (x 2, Y3) in the touch screen is touched, the capacitance of the mutual capacitance between the first electrode and the second electrode corresponding to the position changes, and the position determining module 130 may detect that the on-line voltages of the position O (x 2, Y3) corresponding to the first scan line A1 and the second scan line Y change, respectively, so as to determine that the touch position is located in the area formed by the row electrode group A1 and the column electrode group B1, that is, the area S in fig. 2. After the target row electrode and the target column electrode group are determined, the a1 row first electrode and the a2 row first electrode are sequentially detected to determine the transverse position of the touch point O, and the b1 column second electrode, the b2 column second electrode and the b3 column second electrode are sequentially detected to determine the longitudinal position of the touch point O. Or the first electrode of a1 row and the first electrode of a2 row can be detected simultaneously to determine the transverse position of the touch point O; and simultaneously detecting the b 1-column second electrode, the b 2-column second electrode, and the b 3-column second electrode to determine the longitudinal position of the touch point O.
In the technical scheme of the application, a plurality of rows of first electrodes in the mutual capacitance electrode layer are divided into one or a plurality of row electrode groups, and a plurality of columns of second electrodes are divided into one or a plurality of column electrode groups; then, a plurality of row electrode groups are connected by a first group of scanning lines, and a plurality of rows of first electrodes in the row electrode groups are commonly connected to the first group of scanning lines; a plurality of column electrode groups are connected by a second group of scanning lines, and a plurality of column second electrodes in the column electrode groups are commonly connected to the second group of scanning lines; then, the position determining module scans the row electrode groups and the column electrode groups firstly, so that the time consumed by scanning row by row and column by column can be reduced, and the target row electrode groups and the target column electrode groups corresponding to the touch positions can be detected in time; and finally, scanning a plurality of rows of first electrodes in the target row electrode group and a plurality of rows of second electrodes in the target column electrode group to determine a target first electrode and a target second electrode corresponding to the capacitance variation, thereby finally determining the touch position of a user, reducing missing touch points caused by too slow scanning, and improving the efficiency of the touch screen in identifying the touch position.
In one embodiment of the present application, it comprises: a plurality of row scan lines for connecting the first electrodes and the corresponding first group scan lines; and a plurality of column scan lines for connecting the second electrodes and the corresponding second group scan lines. As shown in fig. 2, the row scan line a1 is used to connect the a1 row first electrode and the first group scan line X, and the row scan line a2 is used to connect the a2 row first electrode and the first group scan line X. The column scanning line b1 is used for connecting the b1 column second electrode and the second scanning line Y, the column scanning line b2 is used for connecting the b2 column second electrode and the second scanning line Y, and the column scanning line b3 is used for connecting the b3 column second electrode and the second scanning line Y.
In one embodiment of the present application, the first electrodes and the second electrodes may be set to have different thicknesses according to a preset rule, as shown in fig. 3a and 3b, in a row electrode group of the touch screen, the first electrodes of the same row have the same thickness, and the first electrodes of different rows have different thicknesses; in the column electrode group of the touch screen, the second electrodes in the same column have the same thickness, and the second electrodes in different columns have different thicknesses. For example, in the row electrode group A2, the thickness of the a1 row first electrode is 80nm, and the thickness of the A2 row first electrode is 100nm; in the column electrode group B1, the thickness of the B1 column second electrode was 80nm, the thickness of the B2 column second electrode was 100nm, and the thickness of the B3 column second electrode was 120nm.
In one embodiment of the present application, the position determining module is configured to determine, after determining the target row electrode group and the target column electrode group corresponding to the capacitance variation, a target first electrode and a target second electrode corresponding to the capacitance variation according to a correspondence between the first electrodes with different thicknesses in the target row electrode group and the second electrodes with different thicknesses in the target column electrode group and the capacitance variation, so as to determine the touch position.
Specifically, in the same row of electrode groups, the capacitance variation generated when the first electrodes of different rows are touched is different, and correspondingly the detected voltage variation or current variation is also different, so that the thickness of the first electrode corresponding to the measured voltage variation is determined according to the corresponding relation between the thickness of the first electrodes of different rows and the voltage variation, namely the first electrode where the touch position is located is determined; similarly, according to the corresponding relation between the second electrodes of different columns and the voltage variation, the thickness of the second electrode corresponding to the measured voltage variation is determined, namely the second electrode where the touch position is located is determined, and therefore the touch position of the user is determined.
In one embodiment of the present application, the first electrodes and the second electrodes may be set to have different sizes according to a preset rule, as shown in fig. 4, in a row electrode group of the touch screen, the first electrodes of the same row have the same size, and the first electrodes of different rows have different sizes; in the column electrode group, the second electrodes of the same column have the same size, and the second electrodes of different columns have different sizes. For example, in the row electrode group A2, the size of the a1 row first electrode is 80nm 2, and the size of the A2 row first electrode is 100nm 2; in the column electrode group B1, the size of the second electrode in the B1 column is 120nm 2, the size of the second electrode in the B2 column is 100nm 2, and the size of the second electrode in the B3 column is 80nm 2. Furthermore, the first electrode and the second electrode can be set to be matched in size, for example, the second electrode around the larger first electrode is smaller, besides the identification area of the touch screen can be optimized, the capacitance variation of the mutual capacitance between the first electrode and the second electrode when touched is more obvious, and the position determining module can conveniently detect signals.
In one embodiment of the present application, the position determining module is configured to determine, after determining the target row electrode group and the target column electrode group corresponding to the capacitance variation, a target first electrode and a target second electrode corresponding to the capacitance variation in the touch area according to a correspondence between different sizes of first electrodes in the target row electrode group and different sizes of second electrodes in the target column electrode group and the capacitance variation, so as to determine the touch position.
Specifically, in the same row of electrode groups, the capacitance variation generated when the first electrodes of different rows are touched is different, and correspondingly the detected voltage variation or current variation is also different, so that the size of the first electrode corresponding to the measured voltage variation is determined according to the corresponding relation between the size of the first electrodes of different rows and the voltage variation, namely the first electrode where the touch position is located is determined; similarly, according to the corresponding relation between the second electrodes of different columns and the voltage variation, the size of the second electrode corresponding to the measured voltage variation is determined, namely the second electrode where the touch position is located is determined, and therefore the touch position of the user is determined.
In a further embodiment, in the row electrode group of the touch screen, the first electrodes of the same row have the same thickness, and the first electrodes of different rows have different thicknesses; in the column electrodes of the touch screen, the second electrodes of the same column have the same size, and the second electrodes of different columns have different sizes. Or in the row electrode group of the touch screen, the first electrodes of the same row have the same size, and the first electrodes of different rows have different sizes; in the column electrode group of the touch screen, the second electrodes in the same column have the same thickness, and the second electrodes in different columns have different thicknesses.
In one embodiment of the present application, as shown in fig. 5, the location determining module includes: a micro control unit 510 for generating a control signal U0 and determining a touch position according to a change of the target signal U3 before and after the touch; the input end of the first signal processing unit 520 is connected with the output end of the micro control unit 510, and the output end is connected with the row electrode group; the first signal processing unit 520 is configured to transmit an excitation signal U1 to the row electrode group according to the control signal U0; the excitation signal U1 is an analog signal of a preset voltage; the second signal processing unit 530 has an input terminal connected to the column electrode group and an output terminal connected to the micro control unit 510; the second signal processing unit 530 is configured to obtain a feedback signal U2 output by the column electrode group, convert the feedback signal U2 into a target signal U3, and output the target signal U3 to the micro control unit 510 for analysis; the voltage variation of the feedback signal U2 corresponds to the capacitance variation of the mutual capacitance between the first electrode and the second electrode.
Specifically, the control signal U0 may be at a high level or a low level, and when the touch screen is powered on, the control signal U0 is at a high level, whereas the control signal U0 is at a low level. The target signal U3 includes a voltage value corresponding to a mutual capacitance formed by the row electrode group and the column electrode group, and also includes a voltage value corresponding to a mutual capacitance formed by the first electrode in the target row electrode group and the second electrode in the target column electrode group. When the control signal U0 is at a constant high level, the first signal processing unit 520 transmits an excitation signal U1 to the row electrode group every 10 ms, the excitation signal U1 is input from the first scan line group to the row electrode group, and outputs the column electrode group from the second scan line group, and the target signal U3 is obtained by repeatedly scanning the row electrode group and the column electrode group, so that the capacitance variation of the mutual capacitance on the row electrode group and the column electrode group caused when the touch screen is detected in real time, thereby determining the target row electrode group and the target column electrode group where the touch position is located. Then, by analyzing the target signal U3, the target first electrode and the target second electrode corresponding to the capacitance change amount are determined, thereby determining the touch position.
In a further embodiment, the first signal processing unit comprises a controller, a modulator and a first operational amplifier; the input end of the controller is connected with the output end of the micro-control unit, and the controller is used for outputting a processing control signal according to the control signal; the input end of the modulator is connected with the output end of the controller, and the modulator is used for generating a first analog signal according to the processing control signal; the input end of the first operational amplifier is connected with the output end of the modulator, the first operational amplifier is used for amplifying the first analog signal into an excitation signal, and the output end of the first operational amplifier is connected with the first group of scanning lines. The second signal processing unit comprises a second operational amplifier, an analog-to-digital converter, a demodulator and a signal processor (DSP); the input end of the second operational amplifier is connected with a second group of scanning lines and is used for obtaining feedback signals on the column electrode group, the feedback signals are amplified by the second operational amplifier and are converted into digital signals by the analog-to-digital converter, and then the digital signals are processed again by the demodulator and the signal processor so as to eliminate interference signals and obtain more accurate touch positions.
As shown in fig. 6, the present application provides a method for determining a touch position, which is applied to a touch screen provided by any one of the embodiments of the present application, and the method includes:
And S610, controlling the position determining module to scan the electrode groups so as to determine a target row electrode group and a target column electrode group corresponding to the capacitance variation.
S620, the control position determining module scans the first electrode in the target row electrode group and the second electrode in the target column electrode group to determine a target first electrode and a target second electrode corresponding to the capacitance change amount.
S630, determining the touch position of the user according to the target first electrode and the target second electrode.
In one embodiment of the present application, the step of determining the target first electrode and the target second electrode corresponding to the capacitance variation includes: determining a target first electrode and a target second electrode corresponding to the capacitance variation according to the corresponding relation between the first electrodes with different thicknesses in the target row electrode group and the second electrodes with different thicknesses in the target column electrode group and the capacitance variation; or determining the target first electrode and the target second electrode corresponding to the capacitance variation in the touch area according to the corresponding relation between the first electrodes with different sizes in the target row electrode group and the second electrodes with different sizes in the target column electrode group and the capacitance variation.
The specific implementation manner of the method for determining the touch position provided by the application is disclosed in the embodiment of the corresponding touch screen, and will not be described herein.
As shown in fig. 7, in another embodiment of the present application, there is provided a display panel 700 including: touch screen 710 provided by any of the embodiments of the present application; and a display frame 720 disposed at a side edge of the touch screen 710 for protecting the touch screen 710. For example, in an application scenario, a user performs operations on a touch screen within a display frame, performs operations such as double-click, long-press, single-finger sliding or double-finger sliding on the touch screen, and the display panel performs different feedback for different operations, such as zooming or zooming an image, performing screen capturing on a current screen, or jumping to a corresponding program.
The specific embodiments of the display panel provided by the application are disclosed in the embodiments of the corresponding touch screen, and are not repeated here.
FIG. 8 schematically shows a block diagram of a computer system for implementing a touch screen according to an embodiment of the application.
It should be noted that, the computer system 800 of the touch screen shown in fig. 8 is only an example, and should not impose any limitation on the functions and the application scope of the embodiments of the present application.
As shown in fig. 8, the computer system 800 includes a processor 801, the processor 801 may be CPU (Central Processing Unit) or MCU (Microcontroller Unit), and the processor 801 may perform various appropriate actions and processes according to a program stored in a Read-Only Memory 802 (ROM) or a program loaded from a storage section 808 into a random access Memory 803 (Random Access Memory, RAM). In the random access memory 803, various programs and data required for system operation are also stored. The processor 801, the rom 802, and the ram 803 are connected to each other via a bus 804. An Input/Output interface 805 (i.e., an I/O interface) is also connected to the bus 804.
The following components are connected to the input/output interface 805: an input portion 806 including a keyboard, mouse, etc.; an output portion 807 including a Cathode Ray Tube (CRT), a Liquid crystal display (Liquid CRYSTAL DISPLAY, LCD), and a speaker, etc.; a storage section 808 including a hard disk or the like; and a communication section 809 including a network interface card such as a local area network card, modem, or the like. The communication section 809 performs communication processing via a network such as the internet. The drive 810 is also connected to the input/output interface 805 as needed. A removable medium 811 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 810 as needed so that a computer program read out therefrom is mounted into the storage section 808 as needed.
In particular, the processes described in the various method flowcharts may be implemented as computer software programs according to embodiments of the application. For example, embodiments of the present application include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising program code for performing the method shown in the flowcharts. In such an embodiment, the computer program may be downloaded and installed from a network via the communication section 809, and/or installed from the removable media 811. The computer programs, when executed by the processor 801, perform the various functions defined in the system of the present application.
It should be noted that, the computer readable medium shown in the embodiments of the present application may be a computer readable signal medium or a computer readable storage medium, or any combination of the two. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-Only Memory (ROM), an erasable programmable read-Only Memory (Erasable Programmable Read Only Memory, EPROM), a flash Memory, an optical fiber, a portable compact disc read-Only Memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In the present application, however, the computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, with the computer-readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the foregoing.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams or flowchart illustration, and combinations of blocks in the block diagrams or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
It should be noted that although in the above detailed description several modules or units of a device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functions of two or more modules or units described above may be embodied in one module or unit in accordance with embodiments of the application. Conversely, the features and functions of one module or unit described above may be further divided into a plurality of modules or units to be embodied.
From the above description of embodiments, those skilled in the art will readily appreciate that the example embodiments described herein may be implemented in software, or may be implemented in software in combination with the necessary hardware. Thus, the technical solution according to the embodiments of the present application may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (may be a CD-ROM, a U-disk, a mobile hard disk, etc.) or on a network, and includes several instructions to cause a computing device (may be a personal computer, a server, a touch terminal, or a network device, etc.) to execute the embodiments according to the present application.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains.
It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (10)

1. A touch screen, comprising:
The display layer is used for displaying the received display information;
The mutual capacitance electrode layer is arranged on one side of the display layer for display and used for generating capacitance variation when a user touches the screen; the mutual capacitance electrode layer comprises one or more row electrode groups and one or more column electrode groups; the row electrode set includes a plurality of rows of first electrodes, and the column electrode set includes a plurality of columns of second electrodes; the first electrodes and the second electrodes are arranged in a staggered manner, and mutual capacitance is formed between the first electrodes and the second electrodes;
A first group of scan lines for connecting a plurality of the row electrode groups; a plurality of rows of the first electrodes in the row electrode group are commonly connected to the first group of scanning lines;
A second group of scan lines for connecting a plurality of the column electrode groups; a plurality of columns of the second electrodes in the column electrode group are commonly connected to the second group of scanning lines;
The position determining module is respectively connected with the first group of scanning lines and the second group of scanning lines; the position determining module is used for scanning the row electrode group and the column electrode group to determine a target row electrode group and a target column electrode group corresponding to the capacitance variation; and scanning the first electrode in the target row electrode group and the second electrode in the target column electrode group to determine a target first electrode and a target second electrode corresponding to the capacitance variation.
2. The touch screen of claim 1, further comprising:
A plurality of row scan lines for connecting the first electrodes and the corresponding first group scan lines;
and a plurality of column scan lines for connecting the second electrodes and the corresponding second group scan lines.
3. The touch screen of claim 1, comprising: in the row electrode group, the first electrodes of the same row have the same thickness, and the first electrodes of different rows have different thicknesses; in the column electrode group, the second electrodes of the same column have the same thickness, and the second electrodes of different columns have different thicknesses.
4. The touch screen of claim 3, wherein the position determining module is configured to determine, after determining the target row electrode group and the target column electrode group corresponding to the capacitance variation, the target first electrode and the target second electrode corresponding to the capacitance variation according to the correspondence between the first electrodes of different thicknesses in the target row electrode group and the second electrodes of different thicknesses in the target column electrode group and the capacitance variation, so as to determine a touch position.
5. The touch screen of claim 1, wherein the first electrodes of the same row have the same size and the first electrodes of different rows have different sizes in the set of row electrodes; in the column electrode group, the second electrodes of the same column have the same size, and the second electrodes of different columns have different sizes.
6. The touch screen of claim 5, wherein the position determining module is configured to determine, after determining a target row electrode group and a target column electrode group corresponding to the capacitance variation, the target first electrode and the target second electrode corresponding to the capacitance variation in the touch area according to correspondence between the first electrodes of different sizes in the target row electrode group and the second electrodes of different sizes in the target column electrode group and the capacitance variation, so as to determine a touch position.
7. The touch screen of claim 1, wherein the location determination module comprises:
The micro control unit is used for generating a control signal and determining a touch position according to the change of the target signals before and after touch;
The input end of the first signal processing unit is connected with the output end of the micro control unit, and the output end of the first signal processing unit is connected with the row electrode group; the first signal processing unit is used for transmitting an excitation signal to the row electrode group according to the control signal; the excitation signal is an analog signal of a preset voltage;
The input end of the second signal processing unit is connected with the column electrode group, and the output end of the second signal processing unit is connected with the micro control unit; the second signal processing unit is used for acquiring feedback signals output by the column electrode group, converting the feedback signals into target signals, and outputting the target signals to the micro control unit for analysis; the voltage variation of the feedback signal corresponds to the capacitance variation of the mutual capacitance between the first electrode and the second electrode.
8. A method of determining a touch location as applied to the touch screen of any one of claims 1 to 7, the method comprising:
The control position determining module scans the electrode group and the electrode group to determine a target row electrode group and a target column electrode group corresponding to the capacitance variation;
Controlling the position determining module to scan the first electrode in the target row electrode group and the second electrode in the target column electrode group so as to determine the target first electrode and the target second electrode corresponding to the capacitance variation;
And determining the touch position of the user according to the target first electrode and the second electrode.
9. The method of determining a touch location of claim 8, wherein the step of determining a target first electrode and a target second electrode corresponding to the capacitance variation comprises:
Determining the target first electrode and the target second electrode corresponding to the capacitance variation according to the corresponding relation between the first electrodes with different thicknesses in the target row electrode group and the second electrodes with different thicknesses in the target column electrode group and the capacitance variation;
or determining the target first electrode and the target second electrode corresponding to the capacitance variation in the touch area according to the corresponding relation between the first electrodes with different sizes in the target row electrode group and the second electrodes with different sizes in the target column electrode group and the capacitance variation.
10. A display panel, comprising: a touch screen as claimed in any one of claims 1 to 7;
the display frame is arranged on the side edge of the touch screen and used for protecting the touch screen.
CN202410234507.7A 2024-02-29 2024-02-29 Touch screen, display panel and method for determining touch position Pending CN118034524A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202410234507.7A CN118034524A (en) 2024-02-29 2024-02-29 Touch screen, display panel and method for determining touch position

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202410234507.7A CN118034524A (en) 2024-02-29 2024-02-29 Touch screen, display panel and method for determining touch position

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