Scanning device and scanning method for touch screen
By employing an odd-even scanning circuit and a touch position determination circuit in a projected capacitive touchscreen, combined with signal reconstruction technology, the problem of detection accuracy when the touch object is located between two receiving electrodes is solved, achieving higher touch detection accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- 瀚瑞微电子科技(深圳)有限公司
- Filing Date
- 2026-01-29
- Publication Date
- 2026-05-12
AI Technical Summary
Existing projected capacitive touchscreens have poor accuracy in touch detection when the object being touched is located between the two receiving electrodes.
An odd-even scanning circuit and a touch position determination circuit are adopted. The odd scanning circuit uses the sum of the sensing signals of the two receiving electrodes as the odd scanning signal, and the even scanning circuit uses the sum of the sensing signals of the two receiving electrodes as the even scanning signal. The signal is reconstructed at low precision through the odd-even merging and reconstruction circuit, thereby improving the detection accuracy.
It improves the accuracy of touch detection results when the object being touched is located between the two receiving electrodes. By merging and reconstructing the odd and even scan signals, it can accurately detect the touch position.
Smart Images
Figure CN121614050B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present disclosure relates to the technical field of display, in particular to a scanning device and a scanning method of a touch screen. BACKGROUND
[0002] The projective capacitive screen is a touch screen using projective capacitive touch technology, and a plurality of driving electrodes and a plurality of receiving electrodes are arranged on the surface of the touch screen. The driving electrodes can be excited to drive, and the receiving electrodes can receive scanning. The touch screen can detect the change of the position capacitance when the finger touches the surface of the screen, so as to calculate the position of the finger and perform touch interaction operation. In the related art, the differential signal of the sensing signal of the adjacent receiving electrodes needs to be reconstructed, and the actual touch position is determined based on the reconstructed signal. However, if a touch object such as a finger is placed between two receiving electrodes, the accuracy of the touch detection result of the touch object in the related art is poor. SUMMARY
[0003] The main purpose of the present disclosure is to provide a scanning device and a scanning method of a touch screen to improve the accuracy of the touch detection result.
[0004] In order to achieve the above purpose, the first aspect of the present disclosure provides a scanning device of a touch screen, the touch screen comprising a plurality of driving electrodes and a plurality of receiving electrodes, the driving electrodes extending along a first direction and arranged along a second direction, the receiving electrodes extending along the second direction and arranged along the first direction, the first direction and the second direction being arranged crossly; the scanning device comprising an odd scanning circuit, an even scanning circuit and a touch position determination circuit; the odd scanning circuit comprising a plurality of odd scanning channels sequentially formed by a plurality of receiving electrodes in a manner of adjacent two by two, the odd scanning circuit being configured to take the sum of the sensing signals obtained from the two receiving electrodes in the odd scanning channel as the odd scanning signal obtained from the odd scanning channel; the even scanning circuit comprising a plurality of even scanning channels sequentially formed by a plurality of receiving electrodes in a manner of adjacent two by two; wherein the two receiving electrodes in each even scanning channel belong to two different odd scanning channels, and the two receiving electrodes in each odd scanning channel belong to two different even scanning channels; the even scanning circuit being configured to take the sum of the sensing signals obtained from the two receiving electrodes in the even scanning channel as the even scanning signal obtained from the even scanning channel; the touch position determination circuit being configured to determine a touch detection result based on a plurality of odd scanning signals obtained from a plurality of odd scanning channels and a plurality of even scanning signals obtained from a plurality of even scanning channels.
[0005] In some embodiments of the present disclosure, the odd scan circuit further comprises a plurality of odd scan pins coupled to the touch position determination circuit, each of the odd scan pins corresponding to an odd scan channel and coupled to two receiving electrodes in the corresponding odd scan channel to obtain a sum of sensing signals from the two receiving electrodes in the odd scan channel as an odd scan signal from the odd scan channel; and the even scan circuit further comprises a plurality of even scan pins coupled to the touch position determination circuit, each of the even scan pins corresponding to an even scan channel and coupled to two receiving electrodes in the corresponding even scan channel to obtain a sum of sensing signals from the two receiving electrodes in the even scan channel as an even scan signal from the even scan channel.
[0006] In some embodiments of the present disclosure, the touch position determination circuit comprises a first touch position calculation module configured to determine a touch detection result based on a plurality of odd scan signals obtained from a plurality of odd scan channels or based on a plurality of even scan signals obtained from a plurality of even scan channels.
[0007] In some embodiments of the present disclosure, the touch position determination circuit further comprises an odd-even merging and reconstruction circuit configured to obtain a reconstructed scan signal based on the plurality of odd scan signals and the plurality of even scan signals when the accuracy of the touch detection result determined by the first touch position calculation module is lower than a set accuracy; and a second touch position calculation module configured to determine the touch detection result based on the reconstructed scan signal.
[0008] In some embodiments of the present disclosure, the odd-even merging and reconstruction circuit comprises:
[0009] a scan signal reconstruction module configured to obtain an odd scan signal curve based on the plurality of odd scan signals and an even scan signal curve based on the plurality of even scan signals;
[0010] a segment splitting module configured to split the odd scan signal curve into a plurality of odd scan signal segments and split the even scan signal curve into a plurality of even scan signal segments;
[0011] a merging module configured to merge the plurality of odd scan signal segments and the plurality of even scan signal segments to obtain a reconstructed scan signal curve as the reconstructed scan signal while keeping the one with a higher slope.
[0012] In some embodiments of the present disclosure, the second touch position calculation module comprises a tip and barycenter calculation module configured to calculate tip and barycenter information of the reconstructed scan signal curve so that the second touch position calculation module determines the touch detection result based on the tip and barycenter information.
[0013] In some embodiments of this disclosure, the odd-even merging reconstruction circuit further includes a signal smoothing circuit configured to smooth the reconstructed scan signal curve obtained by the merging module, so that the second touch position calculation module determines the touch detection result based on the smoothed reconstructed scan signal curve.
[0014] In some embodiments of this disclosure, the first touch position calculation module includes a differential calculation module, which is configured to: determine several odd-scan differential signals based on several odd-scan signals on several odd-scan channels, so that the first touch position calculation module determines a touch detection result based on the several odd-scan differential signals; wherein, the odd-scan differential signal is the differential signal of the odd-scan signals on two adjacent odd-scan channels; or, determine several even-scan differential signals based on several even-scan signals on several even-scan channels, so that the first touch position calculation module determines a touch detection result based on the several even-scan differential signals; wherein, the even-scan differential signal is the differential signal of the even-scan signals on two adjacent even-scan channels; wherein, the touch position determination circuit further includes a precision judgment circuit, which is configured to: determine that the precision of the touch detection result determined by the first touch position calculation module is lower than the set precision when the odd-scan differential signal or the even-scan differential signal is lower than a set signal threshold.
[0015] The second aspect of this disclosure provides a scanning method for a touchscreen. The scanning method is based on any of the touchscreen scanning devices provided in the first aspect of this disclosure. The scanning method includes: using the sum of sensing signals obtained from two receiving electrodes in an odd scanning channel as an odd scanning signal obtained from the odd scanning channel; using the sum of sensing signals obtained from two receiving electrodes in an even scanning channel as an even scanning signal obtained from the even scanning channel; and determining a touch detection result based on a plurality of odd scanning signals obtained from a plurality of odd scanning channels and a plurality of even scanning signals obtained from a plurality of even scanning channels.
[0016] In some embodiments of this disclosure, determining a touch detection result based on several odd scan signals obtained from several odd scan channels and several even scan signals obtained from several even scan channels includes: when the accuracy of the touch detection result determined based on several odd scan signals obtained from several odd scan channels or several even scan signals obtained from several even scan channels is lower than a set accuracy, obtaining an odd scan signal curve based on several odd scan signals and obtaining an even scan signal curve based on several even scan signals; dividing the odd scan signal curve into multiple odd scan signal segments and dividing the even scan signal curve into multiple even scan signal segments; merging the multiple odd scan signal segments and the multiple even scan signal segments with the higher slope as the criterion to obtain a reconstructed scan signal curve as a reconstructed scan signal; calculating the tip and centroid information of the reconstructed scan signal curve, and determining the touch detection result based on the tip and centroid information.
[0017] A third aspect of this disclosure provides a touchscreen comprising: a plurality of driving electrodes and a plurality of receiving electrodes, the driving electrodes extending along a first direction and arranged along a second direction, the receiving electrodes extending along the second direction and arranged along the first direction, the first direction and the second direction being intersected; and a touch control device for any of the touchscreens of the first aspect of this disclosure.
[0018] A fourth aspect of this disclosure provides an electronic device that includes a touchscreen according to a third aspect of this disclosure.
[0019] The touchscreen scanning device and method provided in this disclosure embodiment are configured with an odd scanning circuit, an even scanning circuit, and a touch position determination circuit. The odd scanning circuit includes several odd scanning channels composed of multiple receiving electrodes arranged in adjacent pairs. The even scanning circuit includes several even scanning channels composed of multiple receiving electrodes arranged in adjacent pairs. The two receiving electrodes in each even scanning channel belong to two different odd scanning channels, and the two receiving electrodes in each odd scanning channel belong to two different even scanning channels, thereby offsetting the odd scanning channels from the even scanning channels by one receiving electrode. The odd scanning circuit uses the sum of the sensing signals obtained from the two receiving electrodes in the odd scanning channel as the odd scanning signal obtained from the odd scanning channel, and the even scanning circuit uses the sum of the sensing signals obtained from the two receiving electrodes in the even scanning channel as the even scanning signal obtained from the even scanning channel. Thus, the touch position is determined based on the several odd scanning signals obtained from the several odd scanning channels and the several even scanning signals obtained from the several even scanning channels to determine the touch detection result. When the touch object is placed between two receiving electrodes, the touch detection result of the touch object can be detected more accurately, thereby improving the accuracy of the touch detection result. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this disclosure, the accompanying drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the structure of a touch screen provided in one embodiment of the present disclosure;
[0022] Figure 2 This is a schematic diagram of another touchscreen structure provided in another embodiment of the present disclosure;
[0023] Figure 3This is a schematic diagram of the scanning signal when the object being touched is located between two receiving electrodes in a related technology.
[0024] Figure 4 A schematic block diagram of a touch screen scanning device provided in an embodiment of this disclosure;
[0025] Figure 5 A schematic diagram of a structure provided in an embodiment of this disclosure when a touch object is located between two receiving electrodes;
[0026] Figure 6 for Figure 5 A schematic diagram of the scanning signal in this situation;
[0027] Figure 7 A schematic block diagram of another touchscreen scanning device provided in an embodiment of this disclosure;
[0028] Figure 8 A schematic block diagram of another touchscreen scanning device provided in an embodiment of this disclosure;
[0029] Figure 9A This is a schematic diagram illustrating the segmentation of a scanning signal according to an embodiment of this disclosure;
[0030] Figure 9B To Figure 9A The diagram shown illustrates the merging of the segmented scan signal segments.
[0031] Figure 10 A schematic flowchart of a touchscreen scanning method provided in an embodiment of this disclosure;
[0032] Figure 11 This is a schematic diagram of the process for processing scanning signals provided in an embodiment of this disclosure.
[0033] It should be noted that the elements in the attached diagram are schematic and not drawn to scale. Detailed Implementation
[0034] To enable those skilled in the art to better understand the present disclosure, the technical solutions of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present disclosure, and not all embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present disclosure.
[0035] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0036] In this disclosure, the terms "upper," "middle," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this disclosure and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to constructing and operating in a specific orientation. In this disclosure, the terms "odd," "even," "first," "second," etc., are used only to distinguish technical features and are not intended to limit the technical features themselves.
[0037] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this subject matter pertains. It will be further understood that terms such as those defined in commonly used dictionaries shall be interpreted as having the meaning consistent with their meaning in the context of the specification and in the relevant art, and shall not be interpreted in an idealized or overly formal form unless otherwise explicitly defined herein. As used herein, the statement of “connecting” or “coupling” two or more parts together shall mean that these parts are directly joined together or joined through one or more intermediate components.
[0038] It should be noted that, unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other. This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.
[0039] Example 1
[0040] Figure 1 A schematic block diagram of a touchscreen 1 according to an embodiment of the present disclosure is shown. Figure 1 As shown, the touch screen 1 includes: a plurality of driving electrodes 10 and a plurality of receiving electrodes 20. The driving electrodes 10 extend along a first direction and are arranged along a second direction, and the receiving electrodes 20 extend along the second direction and are arranged along the first direction. The first direction and the second direction are intersected.
[0041] Figure 1 This is a schematic diagram of the structure of a touch screen 1 provided in an embodiment of the present disclosure, as shown below. Figure 1As shown, the touchscreen 1 includes multiple driving electrodes 10 and multiple receiving electrodes 20. The driving electrodes 10 extend along a first direction and are arranged along a second direction, while the receiving electrodes 20 extend along the second direction and are arranged along the first direction. The first and second directions are intersected, and the overlapping area of the driving electrodes 10 and the receiving electrodes 20 can form a mutual capacitance Cm.
[0042] For example, such as Figure 1 As shown, the first direction is the X direction, and the second direction is the Y direction. Therefore, the driving electrode 10 can be understood as a horizontal electrode, and the receiving electrode 20 can be understood as a vertical electrode. The touchscreen 1 includes five driving electrodes 10, namely a first driving electrode 11, a second driving electrode 12, a third driving electrode 13, a fourth driving electrode 14, and a fifth driving electrode 15. The first driving electrode 11, the second driving electrode 12, the third driving electrode 13, the fourth driving electrode 14, and the fifth driving electrode 15 all extend along the X direction, and are arranged along the Y direction.
[0043] The touchscreen 1 also includes four receiving electrodes 20, namely a first receiving electrode 21, a second receiving electrode 22, a third receiving electrode 23, and a fourth receiving electrode 24. Among them, the first receiving electrode 21, the second receiving electrode 22, the third receiving electrode 23, and the fourth receiving electrode 24 all extend along the Y direction, and are arranged along the X direction.
[0044] A mutual capacitance Cm can be formed between the first driving electrode 11 and the first receiving electrode 21. 11 A mutual capacitance Cm can be formed between the first driving electrode 11 and the second receiving electrode 22. 12 A mutual capacitance Cm can be formed between the first driving electrode 11 and the third receiving electrode 23. 13 A mutual capacitance Cm can be formed between the first driving electrode 11 and the fourth receiving electrode 24. 14 A mutual capacitance Cm can be formed between the second driving electrode 12 and the first receiving electrode 21. 21 A mutual capacitance Cm can be formed between the second driving electrode 12 and the second receiving electrode 22. 22 A mutual capacitance Cm can be formed between the second driving electrode 12 and the third receiving electrode 23. 23 A mutual capacitance Cm can be formed between the second driving electrode 12 and the fourth receiving electrode 24. 24 A mutual capacitance Cm can be formed between the third driving electrode 13 and the first receiving electrode 21. 31 A mutual capacitance Cm can be formed between the third driving electrode 13 and the second receiving electrode 22. 32A mutual capacitance Cm can be formed between the third driving electrode 13 and the third receiving electrode 23. 33 A mutual capacitance Cm can be formed between the third driving electrode 13 and the fourth receiving electrode 24. 34 A mutual capacitance Cm can be formed between the fourth driving electrode 14 and the first receiving electrode 21. 41 A mutual capacitance Cm can be formed between the fourth driving electrode 14 and the second receiving electrode 22. 42 A mutual capacitance Cm can be formed between the fourth driving electrode 14 and the third receiving electrode 23. 43 A mutual capacitance Cm can be formed between the fourth driving electrode 14 and the fourth receiving electrode 24. 44 A mutual capacitance Cm can be formed between the fifth driving electrode 15 and the first receiving electrode 21. 51 A mutual capacitance Cm can be formed between the fifth driving electrode 15 and the second receiving electrode 22. 52 A mutual capacitance Cm can be formed between the fifth driving electrode 15 and the third receiving electrode 23. 53 A mutual capacitance Cm can be formed between the fifth driving electrode 15 and the fourth receiving electrode 24. 54 .
[0045] In other embodiments, refer to Figure 2 The touchscreen 1 may include two, three, four, or five or more driving electrodes 10 and two, three, or four or more receiving electrodes 20, and the number of mutual capacitances that can be formed between the driving electrodes 10 and the receiving electrodes 20 is the product of the number of receiving electrodes 20 and the number of driving electrodes 10. In practical applications, there is no specific limitation on the specific number of driving electrodes 10 and receiving electrodes 20 in the touchscreen 1. (Reference) Figure 2 The excitation signals received by the multiple driving electrodes 10 are Tx1, Tx2, Tx3, etc., and the induction signals Rx received by the multiple receiving electrodes 20 are Rx0, Rx1, Rx2, Rx3, Rx4, Rx5, etc. It should be noted that... Figure 1 and Figure 2 This example only illustrates the first direction as the X direction and the second direction as the Y direction. In other embodiments, the first direction can be the Y direction and the second direction as the X direction. Accordingly, the driving electrode 10 can be understood as a longitudinal electrode and the receiving electrode 20 can be understood as a transverse electrode.
[0046] In differential scanning of related technologies, reference Figure 3If the first touch object 3, such as a finger, is placed between the two receiving electrodes, the distance between the first touch object 3 and the two receiving electrodes is equal or close, so the sensing signals Rx1 and Rx2 received by the two receiving electrodes are close or equal. When the sensing signals Rx1 and Rx2 received by the two receiving electrodes are subtracted to obtain the differential reconstruction signal (Rx1-Rx2), the differential reconstruction signal will be too low or absent, resulting in low accuracy of the touch detection result and poor accuracy of the touch detection result for the first touch object 3.
[0047] To address the aforementioned problems, this disclosure provides a touchscreen scanning device aimed at improving the accuracy of touch detection results. (Reference) Figure 4 The scanning device shown includes an odd scanning circuit, an even scanning circuit, and a touch position determination circuit. The odd scanning circuit comprises several odd scanning channels, each consisting of multiple receiving electrodes Rx arranged in adjacent pairs. The even scanning circuit comprises several even scanning channels, each consisting of multiple receiving electrodes Rx arranged in adjacent pairs. The two receiving electrodes Rx in each even scanning channel belong to two different odd scanning channels, and the two receiving electrodes Rx in each odd scanning channel belong to two different even scanning channels, thus ensuring that the odd scanning channels and even scanning channels are separated by one receiving electrode Rx. (Reference) Figure 4 The odd scan circuit obtains the sum of the sensing signals Rx from the two receiving electrodes Rx in the odd scan channel as the odd scan signal Rxo obtained from the odd scan channel, and the even scan circuit obtains the sum of the sensing signals Rx from the two receiving electrodes Rx in the even scan channel as the even scan signal Rxe obtained from the even scan channel.
[0048] For example, refer to Figure 4 The first receiving electrode 21, the second receiving electrode 22, the third receiving electrode 23, the fourth receiving electrode 24, the fifth receiving electrode 25, the sixth receiving electrode 26, the seventh receiving electrode 27, the eighth receiving electrode 28, and the ninth receiving electrode 29 are arranged from left to right in the first direction. The induced signals Rx received by the first receiving electrode 21 to the ninth receiving electrode 29 are Rx1, Rx2, Rx3, Rx4, Rx5, Rx6, Rx7, Rx8, and Rx9, respectively.
[0049] refer to Figure 4The odd scanning circuit includes several odd scanning channels. For example, the first receiving electrode 21 and the second receiving electrode 22 form the first odd scanning channel, and the first odd scanning signal Rxo1 received by the first odd scanning channel is Rx1 + Rx2; the third receiving electrode 23 and the fourth receiving electrode 24 form the second odd scanning channel, and the second odd scanning signal Rxo2 received by the second odd scanning channel is Rx3 + Rx4; the fifth receiving electrode 25 and the sixth receiving electrode 26 form the third odd scanning channel, and the third odd scanning signal Rxo3 received by the third odd scanning channel is Rx5 + Rx6; the seventh receiving electrode 27 and the eighth receiving electrode 28 form the fourth odd scanning channel, and the fourth odd scanning signal Rxo4 received by the fourth odd scanning channel is Rx7 + Rx8.
[0050] refer to Figure 4 The even scan circuit includes several even scan channels. For example, the second receiving electrode 22 and the third receiving electrode 23 form the first even scan channel, and the first even scan signal Rxe1 received by the first even scan channel is Rx2+Rx3; the fourth receiving electrode 24 and the fifth receiving electrode 25 form the second even scan channel, and the second even scan signal Rxe2 received by the second even scan channel is Rx4+Rx5; the sixth receiving electrode 26 and the seventh receiving electrode 27 form the third even scan channel, and the third even scan signal Rxe3 received by the third even scan channel is Rx6+Rx7; the eighth receiving electrode 28 and the ninth receiving electrode 29 form the fourth even scan channel, and the fourth even scan signal Rxe4 received by the fourth even scan channel is Rx8+Rx9.
[0051] refer to Figure 4 The touch position determination circuit is coupled to the odd-scan circuit and the even-scan circuit, thereby determining the touch detection result based on several odd-scan signals Rxo obtained from several odd-scan channels and several even-scan signals Rxe obtained from several even-scan channels. For example, refer to... Figure 4 The touch position determination circuit determines the touch detection result based on the first odd scan signal Rxo1 to the fourth odd scan signal Rxo4 (Rxo1 to Rxo4) and the first even scan signal Rxe1 to the fourth even scan signal Rxe4 (Rxe1 to Rxe4). Therefore, when the object being touched is placed between the two receiving electrodes, the touch detection result of the object can be detected more accurately, thereby improving the accuracy of the touch detection result. The principle is as follows.
[0052] refer to Figure 5 The second touch object 50 is placed between the two receiving electrodes (the second receiving electrode 22 and the third receiving electrode 23), such as Figure 6The lower half shown is a scan pattern obtained based on several odd scan signals Rxo. The first odd scan signal Rxo1 and the second odd scan signal Rxo2 are equal or approximately equal. When using differential reconstruction, the differential reconstruction signal obtained by subtracting the second odd scan signal Rxo2 from the first odd scan signal Rxo1 is too small or almost zero, losing top precision and making it almost impossible to detect the second touch object 50, resulting in poor accuracy of the touch detection result. However, as... Figure 6 The upper part of the image is a scan pattern obtained based on several even scan signals Rxe. The tip feature of the first even scan signal Rxe1 is more obvious, possessing top precision. Therefore, when the odd scan channel encounters a low-precision scan result, it can be compensated by the even scan channel. Thus, by reconstructing and merging the odd and even scan results as a whole, a higher precision touch position tip signal can be obtained, resulting in a more accurate touch detection result and achieving a more precise detection objective. Therefore, by re-dividing all channels into odd scan channel regions and even scan channel regions as proposed in this disclosure, the tip precision of the scan signal when touched by a second touch object 50 such as a finger can be improved, thereby enhancing the accuracy of the touch detection result.
[0053] For example, refer to Figure 7 The odd-scan circuit may further include several odd-scan pins 710 coupled to the control position determination circuit. Each odd-scan pin 710 corresponds to an odd-scan channel and is coupled to two receiving electrodes in the corresponding odd-scan channel. The sum of the sensed signals Rx obtained from the two receiving electrodes in the odd-scan channel is used as the odd-scan signal Rxo obtained from the odd-scan channel. That is, by coupling two receiving electrodes (Rx) in the same odd-scan channel to the same odd-scan pin 710, the sensed signals Rx obtained from the two receiving electrodes in the same odd-scan channel can be automatically accumulated to obtain the odd-scan signal Rxo obtained from the odd-scan channel. Since the odd-scan signal Rxo is obtained by summing the sensed signals Rx from the two receiving electrodes, the odd-scan signal Rxo is at least not less than the sensed signal Rx received from a single receiving electrode.
[0054] For example, refer to Figure 7The plurality of odd scan pins 710 include at least a first odd scan pin 711, a second odd scan pin 712, and a third odd scan pin 713. The first odd scan pin 711 is coupled to the first receiving electrode 21 and the second receiving electrode 22, so that the first odd scan signal Rxo1 obtained from the first odd scan pin 711 is equal to Rx1 + Rx2. The second odd scan pin 712 is coupled to the third receiving electrode 23 and the fourth receiving electrode 24, so that the second odd scan signal Rxo2 obtained from the second odd scan pin 712 is equal to Rx3 + Rx4. The third odd scan pin 713 is coupled to the fifth receiving electrode 25 and the sixth receiving electrode 26, so that the third odd scan signal Rxo3 obtained from the third odd scan pin 713 is equal to Rx5 + Rx6.
[0055] For example, refer to Figure 7 The even-scan circuit may further include several even-scan pins 720 coupled to the contact position determination circuit. Each even-scan pin 720 corresponds to an even-scan channel and is coupled to two receiving electrodes in the corresponding even-scan channel. The sum of the sensed signals Rx obtained from the two receiving electrodes in the even-scan channel is used as the even-scan signal Rxe obtained from the even-scan channel. That is, by coupling two receiving electrodes (Rx) in the same even-scan channel to the same even-scan pin 720, the sensed signals Rx obtained from the two receiving electrodes in the same even-scan channel can be automatically accumulated to obtain the even-scan signal Rxe obtained from the even-scan channel. Since the even-scan signal Rxe is obtained by summing the sensed signals Rx from the two receiving electrodes, the even-scan signal Rxe is at least not less than the sensed signal Rx received from a single receiving electrode.
[0056] For example, refer to Figure 7 The plurality of even scan pins 720 include at least a first even scan pin 721, a second even scan pin 722, and a third even scan pin 723. The first even scan pin 721 is coupled to the second receiving electrode 22 and the third receiving electrode 23, so that the first even scan signal Rxe1 obtained from the first even scan pin 721 is equal to Rx2 + Rx3. The second even scan pin 722 is coupled to the fourth receiving electrode 24 and the fifth receiving electrode 25, so that the second even scan signal Rxe2 obtained from the second even scan pin 722 is equal to Rx4 + Rx5. The third even scan pin 723 is coupled to the sixth receiving electrode 26 and the seventh receiving electrode 27, so that the third even scan signal Rxe3 obtained from the third even scan pin 723 is equal to Rx6 + Rx7.
[0057] During the scanning process, the same or different excitation signals can be measured and input to several driving electrodes 10, thereby receiving the induced signal Rx through several receiving electrodes 20. After performing odd-even continuous scanning, the scanning results obtained by the odd scanning circuit and the even scanning circuit are decoded separately and independently, thereby obtaining the odd scanning signal Rxo and the even scanning signal Rxe that do not affect each other.
[0058] There are several ways to set up a touch position determination circuit, some of which are illustrated below.
[0059] For example, the touch position determination circuit may include: a first touch position calculation module, which determines the touch detection result based on several odd scan signals Rxo obtained from several odd scan channels, or based on several even scan signals Rxe obtained from several even scan channels. That is, the first touch position calculation module is used to determine the touch detection result solely based on several odd scan signals Rxo, or solely based on several even scan signals Rxe, thereby accurately determining the touch detection result when the touch object touches the odd scan channel or the even scan channel.
[0060] Regarding the method by which the first touch position calculation module determines the touch detection result based solely on several odd scan signals Rxo, various methods can be employed, such as, but not limited to, differential reconstruction. Similarly, the method of determining the touch detection result based on several even scan signals Rxe obtained from several even scan channels can also employ methods such as, but not limited to, differential reconstruction.
[0061] For example, refer to Figure 8 The touch position determination circuit may further include: an odd-even merging and reconstruction circuit and a second touch position calculation module. The odd-even merging and reconstruction circuit is configured to: when the accuracy of the touch detection result determined by the first touch position calculation module is lower than a set accuracy, obtain a reconstructed scan signal based on several odd scan signals Rxo and several even scan signals Rxe. The second touch position calculation module is configured to determine the touch detection result based on the reconstructed scan signal. That is, when the accuracy of the touch detection result determined by the first touch position calculation module is low, it indicates that the object being touched is in the area between the two receiving electrodes 20. In this case, the reconstructed scan signal can be obtained by merging and reconstructing several odd scan signals Rxo and several even scan signals Rxe. Then, the second touch position calculation module determines the touch detection result based on the reconstructed scan signal, thereby improving the accuracy of the touch detection result for objects touching between the two receiving electrodes.
[0062] There are several ways to set up the odd-even merging and reconstruction circuit. Some of these methods are illustrated below.
[0063] For example, the odd-even merging reconstruction circuit may include: a scan signal reconstruction module, a segmentation module, and a merging module. The scan signal reconstruction module obtains an odd scan signal curve based on several odd scan signals Rxo, and also obtains an even scan signal curve based on several even scan signals Rxe. The segmentation module divides the odd scan signal curve into multiple odd scan signal segments, and also divides the even scan signal curve into multiple even scan signal segments. The merging module, prioritizing the segment with the higher slope, merges the multiple odd scan signal segments with the multiple even scan signal segments to obtain the reconstructed scan signal curve. Through this reconstruction-segmentation-merging method, the odd scan signal Rxo and even scan signal Rxe are segmented and merged using the decoding results of the odd and even scan circuits, resulting in a more accurate scan result. This highlights the peak position information of the reconstructed scan signal curve, thereby improving the accuracy of touch detection results when subsequently calculated based on the reconstructed scan signal curve.
[0064] It should be noted that there are multiple ways to obtain the odd scan signal curve based on several odd scan signals Rxo in the scan signal reconstruction module. Some methods are described in the following embodiments.
[0065] In some embodiments, reference Figure 6 The lower part can directly obtain the odd scan signal curve based on several odd scan signals Rxo, without processing the odd scan signals Rxo. Specifically, the arrangement order of multiple odd scan channels in the first direction is used as the horizontal axis, and the energy magnitude of the odd scan signals Rxo corresponding to each odd scan channel is used as the vertical axis. First, the odd scan signals Rxo corresponding to each odd scan channel are plotted as sample points on the coordinate system, and then various types of fitting methods are used to obtain the odd scan signal curve.
[0066] In other embodiments, several odd-scan differential signals can be determined based on several odd-scan signals Rxo on several odd-scan channels, and then an odd-scan signal curve can be determined based on these odd-scan differential signals. Here, the odd-scan differential signals are the difference signals between the odd-scan signals Rxo on two adjacent odd-scan channels. For example, the several odd-scan differential signals may include: Rxo1-Rxo2, Rxo2-Rxo3, ... etc. The odd-scan signal curve is then determined based on these odd-scan differential signals. In this case, when determining the odd-scan signal curve based on several odd-scan differential signals, the arrangement order of the multiple odd-scan channels in the first direction is used as the abscissa, and the energy magnitude of the odd-scan differential signals is used as the ordinate. First, each odd-scan differential signal is plotted as a sample point on the coordinate system, and then various types of fitting methods are used to obtain the odd-scan signal curve.
[0067] Similarly, regarding the method by which the scan signal reconstruction module obtains the even scan signal curve based on several even scan signals Rxe, there are various methods that can be adopted, some of which are described in the following embodiments.
[0068] In some embodiments, reference Figure 6 The upper part can directly obtain the even scan signal curve based on several even scan signals Rxe, without processing the several even scan signals Rxe. Specifically, the arrangement order of multiple even scan channels in the first direction is used as the horizontal axis, and the energy magnitude of the even scan signals Rxe corresponding to each even scan channel is used as the vertical axis. First, the even scan signals Rxe corresponding to each even scan channel are plotted as sample points on the coordinate system, and then various types of fitting methods are used to obtain the even scan signal curve.
[0069] In other embodiments, several even-scan differential signals can be determined based on several even-scan signals Rxe on several even-scan channels, and then an even-scan signal curve can be determined based on these even-scan differential signals; wherein, the even-scan differential signal is the difference signal between the even-scan signals Rxe on two adjacent even-scan channels. For example, the several even-scan differential signals may include: Rxe1-Rxe2, Rxe2-Rxe3, ... etc. Then, the odd-scan signal curve is determined based on these even-scan differential signals. In this case, when determining the even-scan signal curve based on several even-scan differential signals, the arrangement order of the multiple even-scan channels in the first direction is used as the abscissa, and the energy magnitude of the even-scan differential signals is used as the ordinate. First, each even-scan differential signal is plotted as a sample point on the coordinate system, and then various types of fitting methods are used to obtain the even-scan signal curve.
[0070] The segmentation module can segment an odd-scan signal curve into multiple odd-scan signal segments, and an even-scan signal curve into multiple even-scan signal segments, in various ways. Some examples are described below. For instance, refer to... Figure 9A The odd scan signal curve 91 can be segmented according to a set horizontal coordinate period to obtain multiple odd scan signal segments with equal horizontal coordinate segments. Similarly, the even scan signal curve 92 can be segmented according to the same set horizontal coordinate period to obtain multiple even scan signal segments with equal horizontal coordinate segments. Since the horizontal coordinate segments of the odd and even scan signal segments are equal, subsequent merging is convenient. The aforementioned set horizontal coordinate period can be equal to the horizontal coordinate length between the two receiving electrodes, thereby coupling the odd and even scan signal segments with the positions of the receiving electrodes, facilitating the determination of accurate touch detection results based on the positions of the receiving electrodes.
[0071] refer to Figure 9A and Figure 9BIn the process of merging multiple odd-scan signal segments with multiple even-scan signal segments to obtain the reconstructed scan signal curve 93 as the reconstructed scan signal, the merging module retains the segment with the higher slope and discards the segment with the lower slope among the odd-scan and even-scan signal segments corresponding to the same horizontal coordinate segment position. This process is repeated sequentially from one end of the horizontal coordinate to the other to obtain the reconstructed scan signal curve 93 as the reconstructed scan signal. In some embodiments, the horizontal coordinate length between the two receiving electrodes is defined as a set horizontal coordinate period, thus coupling the reconstructed scan signal curve 93 with the position of the receiving electrodes, facilitating the determination of accurate touch detection results based on the position of the receiving electrodes.
[0072] Regarding the method by which the second touch position calculation module obtains the touch detection result based on the reconstructed scan signal curve 93, there are several methods that can be used. Some of these methods are illustrated below.
[0073] For example, refer to Figure 8 The second touch position calculation module may include a tip and center of gravity calculation module, which is configured to calculate the tip and center of gravity information of the reconstructed scan signal curve 93, so that the second touch position calculation module can determine the touch detection result based on the tip and center of gravity information. That is, the second touch position calculation module calculates the touch detection result based on the tip and center of gravity information of the reconstructed scan signal curve 93. Since the reconstructed scan signal curve 93 can better highlight the tip position information and center of gravity information compared with the odd scan signal curve 91 and the even scan signal curve 92, the above calculation method can improve the accuracy of the touch detection result. Of course, in other embodiments, the second touch position calculation module can also use a differential reconstruction method based on the reconstructed scan signal curve 93 to obtain the touch detection result.
[0074] For example, refer to Figure 8 The odd-even merging and reconstruction circuit may further include a signal smoothing circuit, which smooths the reconstructed scan signal curve 93 obtained by the merging module, so that the second touch position calculation module determines the touch detection result based on the smoothed reconstructed scan signal curve 93. For example, in some embodiments, the tip and centroid calculation module calculates the tip and centroid information of the smoothed reconstructed scan signal curve 93. In other embodiments, the second touch position calculation module may also use a differential reconstruction method based on the smoothed reconstructed scan signal curve 93 to obtain the touch detection result, thereby improving the accuracy of the touch detection result.
[0075] There are several ways to determine whether the accuracy of the touch detection result determined by the first touch position calculation module is lower than the set accuracy. Some of these methods are illustrated below.
[0076] For example, when the first touch position calculation module uses a differential reconstruction method to determine the touch detection result based on several odd scan signals Rxo, the first touch position calculation module may include a differential calculation module. The differential calculation module is configured to: determine several odd scan differential signals based on several odd scan signals Rxo on several odd scan channels, so that the first touch position calculation module determines the touch detection result based on several odd scan differential signals; wherein, the odd scan differential signal is the differential signal of the odd scan signals Rxo on two adjacent odd scan channels.
[0077] For example, when the first touch position calculation module uses a differential reconstruction method to determine the touch detection result based on several even scan signals Rxe, the above-mentioned differential calculation module can also be configured to: determine several even scan differential signals based on several even scan signals Rxe on several even scan channels, so that the first touch position calculation module determines the touch detection result based on several even scan differential signals; wherein, the even scan differential signal is the differential signal of the even scan signals Rxe on two adjacent even scan channels.
[0078] At this point, exemplarily, the touch position determination circuit may further include a precision judgment circuit, which is configured to: determine that the precision of the touch detection result determined by the first touch position calculation module is lower than the set precision when the odd scan differential signal or the even scan differential signal is lower than a set signal threshold. For example, refer to Figure 6 If the odd-scan differential signal (Rxo1-Rxo2) is lower than a set signal threshold, it indicates that the accuracy of the touch detection result determined based on several odd-scan differential signals is lower than the set accuracy. In this way, the accuracy of the touch detection result output by the first touch position calculation module can be predicted without waiting for the first touch position calculation module to output the result, thereby reducing the computational load of the first touch position calculation module. Simultaneously, since there is a strong coupling relationship between the odd-scan differential signal or the even-scan differential signal and the accuracy of the touch detection result determined by the first touch position calculation module, specifically, the larger the odd-scan differential signal or the even-scan differential signal, the higher the accuracy of the touch detection result determined by the first touch position calculation module; conversely, the smaller the odd-scan differential signal or the even-scan differential signal, the lower the accuracy of the touch detection result determined by the first touch position calculation module. Therefore, this embodiment utilizes this characteristic to improve the accuracy of predicting the accuracy of the touch detection result determined by the first touch position calculation module.
[0079] It should be understood that the touch screen scanning device of this disclosure may include other components in addition to the components shown above, and these components are all within the protection scope of the touch screen scanning device of this disclosure.
[0080] Example 2
[0081] This disclosure also provides a touchscreen scanning method, which is based on any of the touchscreen scanning devices provided in Embodiment 1 of this disclosure, with reference to... Figure 10 The scanning method mainly includes the following steps:
[0082] Step S110: The sum of the sensing signals obtained from the two receiving electrodes in the odd scan channel is taken as the odd scan signal obtained from the odd scan channel;
[0083] Step S120: The sum of the sensing signals obtained from the two receiving electrodes in the even scan channel is taken as the even scan signal obtained from the even scan channel;
[0084] Step S130: Determine the touch detection result based on several odd scan signals obtained from several odd scan channels and several even scan signals obtained from several even scan channels.
[0085] The scanning method described above achieves the technical effects of the touchscreen scanning device described in Embodiment 1, and will not be repeated here. The specific implementation of the above steps can be found in the corresponding description of the scanning device section in Embodiment 1, and will not be repeated here either.
[0086] In determining the touch detection result based on several odd scan signals obtained from several odd scan channels and several even scan signals obtained from several even scan channels, various methods can be used. The relevant operation methods described in the foregoing embodiments can be referred to, and one method is described below as an example.
[0087] For example, refer to Figure 11 Determining the touch detection result based on several odd-scan signals obtained from several odd-scan channels and several even-scan signals obtained from several even-scan channels may include the following steps:
[0088] When the accuracy of the touch detection result determined based on several odd scan signals obtained from several odd scan channels or several even scan signals obtained from several even scan channels is lower than the set accuracy, an odd scan signal curve is obtained based on several odd scan signals, and an even scan signal curve is obtained based on several even scan signals.
[0089] The odd scan signal curve is divided into multiple odd scan signal segments, and the even scan signal curve is divided into multiple even scan signal segments;
[0090] Using the one with the higher slope as the standard, multiple odd scan signal segments are merged with multiple even scan signal segments to obtain the reconstructed scan signal curve as the reconstructed scan signal;
[0091] The tip and centroid information of the reconstructed scan signal curve are calculated, and the touch detection result is determined based on the tip and centroid information.
[0092] Example 3
[0093] This disclosure provides a touch screen, which includes: a plurality of driving electrodes and a plurality of receiving electrodes, the driving electrodes extending along a first direction and arranged along a second direction, the receiving electrodes extending along the second direction and arranged along the first direction, the first direction and the second direction being intersected; and a scanning device for any of the touch screens shown in this disclosure.
[0094] Example 4
[0095] This disclosure provides an electronic device including a touchscreen as shown in Embodiment 2. The electronic device can be, but is not limited to, home appliances, communication terminal equipment, industrial control equipment, motor drive equipment, and vehicle-mounted electronic equipment.
[0096] As can be seen from the above description, this disclosure achieves the following technical effects: it proposes an interleaved differential capacitance scanning device to improve the accuracy of traditional differential capacitance scanning. This disclosure uses an interleaved differential scanning method, dividing the scanning channel into two forms: odd scanning channel and even scanning channel. When one form encounters a situation where the accuracy is too low, the other form can make up for it, thereby improving the accuracy of touch detection results.
[0097] Unless otherwise expressly indicated by the context, the singular form of words used herein and in the appended claims includes the plural form, and vice versa. Thus, when referring to the singular, the plural form of the corresponding term is generally included. Similarly, the terms “comprising” and “including” shall be interpreted as including rather than exclusively. Likewise, the terms “including” and “or” shall be interpreted as including unless such interpretation is expressly prohibited herein. Where the term “example” is used herein, particularly when it follows a set of terms, “example” is merely exemplary and illustrative and should not be considered exclusive or extensive.
[0098] Further aspects and scope of adaptation become apparent from the description provided herein. It should be understood that various aspects of this disclosure may be implemented individually or in combination with one or more other aspects. It should also be understood that the descriptions and specific embodiments herein are for illustrative purposes only and are not intended to limit the scope of this disclosure.
[0099] Several embodiments of this disclosure have been described in detail above. However, it is obvious that those skilled in the art can make various modifications and variations to the embodiments of this disclosure without departing from the spirit and scope of this disclosure. The scope of protection of this disclosure is defined by the appended claims. Although embodiments of this disclosure have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this disclosure, and all such modifications and variations fall within the scope defined by the appended claims.
Claims
1. A scanning device for a touchscreen, characterized in that, The touch screen includes multiple driving electrodes and multiple receiving electrodes. The driving electrodes extend along a first direction and are arranged along a second direction, and the receiving electrodes extend along the second direction and are arranged along the first direction. The first direction and the second direction are intersecting. The scanning device includes: An odd scanning circuit includes several odd scanning channels formed by the plurality of receiving electrodes arranged in adjacent pairs. The odd scanning circuit is configured to use the sum of the sensing signals obtained from two receiving electrodes in the odd scanning channel as the odd scanning signal obtained from the odd scanning channel. An even-scan circuit includes several even-scan channels formed by the plurality of receiving electrodes arranged in adjacent pairs; wherein, the two receiving electrodes in each even-scan channel belong to two different odd-scan channels, and the two receiving electrodes in each odd-scan channel belong to two different even-scan channels; the even-scan circuit is configured to: use the sum of the sensed signals obtained from the two receiving electrodes in the even-scan channels as the even-scan signal obtained from the even-scan channels; and... A touch position determination circuit is configured to: determine a touch detection result based on several odd scan signals obtained from several odd scan channels and several even scan signals obtained from several even scan channels; the touch position determination circuit includes: an odd-even merging reconstruction circuit, configured to: when the accuracy of the touch detection result determined based on several odd scan signals or based on several even scan signals is lower than a set accuracy, obtain a reconstructed scan signal based on several odd scan signals and several even scan signals, and determine the touch detection result based on the reconstructed scan signal; The odd-even merging and reconstruction circuit includes: The scanning signal reconstruction module is configured to: obtain an odd scanning signal curve based on several odd scanning signals, and obtain an even scanning signal curve based on several even scanning signals; The segmentation module is configured to: segment the odd scan signal curve into multiple odd scan signal segments, and segment the even scan signal curve into multiple even scan signal segments; The merging module is configured to merge multiple odd scan signal segments with multiple even scan signal segments based on retaining the one with the higher slope to obtain the reconstructed scan signal curve as the reconstructed scan signal. This includes retaining the one with the higher slope and discarding the one with the lower slope at the same horizontal coordinate segment position, and discarding the one with the lower slope at the same horizontal coordinate segment position.
2. The scanning device as described in claim 1, characterized in that, The odd scanning circuit further includes several odd scanning pins coupled to the touch position determination circuit; each odd scanning pin corresponds to an odd scanning channel and is coupled to two receiving electrodes in the corresponding odd scanning channel, so that the sum of the sensing signals obtained from the two receiving electrodes in the odd scanning channel is used as the odd scanning signal obtained from the odd scanning channel. The even-scan circuit further includes several even-scan pins coupled to the touch position determination circuit. Each even-scan pin corresponds to an even-scan channel and is coupled to two receiving electrodes in the corresponding even-scan channel, so that the sum of the sensing signals obtained from the two receiving electrodes in the even-scan channel is used as the even-scan signal obtained from the even-scan channel.
3. The scanning device as described in claim 1, characterized in that, The touch position determination circuit includes: The first touch position calculation module is configured to: determine the touch detection result based on several odd scan signals obtained from several odd scan channels, or determine the touch detection result based on several even scan signals obtained from several even scan channels.
4. The scanning device as described in claim 3, characterized in that, The odd-even merging reconstruction circuit is configured to: when the accuracy of the touch detection result determined by the first touch position calculation module is lower than the set accuracy, obtain a reconstructed scan signal based on several odd scan signals and several even scan signals; and, The touch position determination circuit further includes a second touch position calculation module, configured to determine the touch detection result based on the reconstructed scan signal.
5. The scanning device as described in claim 4, characterized in that, The second touch position calculation module includes: The tip and center of gravity calculation module is configured to calculate the tip and center of gravity information of the reconstructed scanning signal curve, so that the second touch position calculation module determines the touch detection result based on the tip and center of gravity information.
6. The scanning device as described in claim 4, characterized in that, The odd-even merging and reconstruction circuit also includes: The signal smoothing circuit is configured to smooth the reconstructed scan signal curve obtained by the merging module, so that the second touch position calculation module determines the touch detection result based on the smoothed reconstructed scan signal curve.
7. The scanning device as claimed in claim 4, characterized in that, The first touch position calculation module includes a differential calculation module, which is configured as follows: Based on several odd scan signals on several odd scan channels, several odd scan differential signals are determined, so that the first touch position calculation module determines the touch detection result based on the several odd scan differential signals; wherein, the odd scan differential signal is the differential signal of the odd scan signals on two adjacent odd scan channels; or, Based on several even scan signals on several even scan channels, several even scan differential signals are determined so that the first touch position calculation module determines the touch detection result based on the several even scan differential signals; wherein, the even scan differential signal is the differential signal of the even scan signals on two adjacent even scan channels; The touch position determination circuit further includes an accuracy judgment circuit, which is configured to determine that the accuracy of the touch detection result determined by the first touch position calculation module is lower than the set accuracy when the odd scan differential signal or the even scan differential signal is lower than a set signal threshold.
8. A scanning method for a touchscreen, characterized in that, The scanning method is based on the scanning device of the touch screen according to any one of claims 1 to 7, and the scanning method includes: The sum of the sensed signals obtained from the two receiving electrodes in the odd scan channel is taken as the odd scan signal obtained from the odd scan channel; The sum of the sensing signals obtained from the two receiving electrodes in the even scan channel is taken as the even scan signal obtained from the even scan channel; The touch detection result is determined based on several odd-scan signals obtained from several odd-scan channels and several even-scan signals obtained from several even-scan channels, including: When the accuracy of the touch detection result determined based on several odd scan signals obtained from several odd scan channels or several even scan signals obtained from several even scan channels is lower than a set accuracy, a reconstructed scan signal is obtained based on several odd scan signals and several even scan signals. This includes: obtaining an odd scan signal curve based on several odd scan signals, and obtaining an even scan signal curve based on several even scan signals; dividing the odd scan signal curve into multiple odd scan signal segments, and dividing the even scan signal curve into multiple even scan signal segments; merging the multiple odd scan signal segments and the multiple even scan signal segments with the one with the higher slope as the criterion to obtain a reconstructed scan signal curve as the reconstructed scan signal, which includes: retaining the one with the higher slope and discarding the one with the lower slope among the odd scan signal segments and even scan signal segments corresponding to the same horizontal coordinate segment position, and discarding the one with the lower slope among the odd scan signal segments and even scan signal segments corresponding to the same horizontal coordinate segment position; The touch detection result is determined based on the reconstructed scan signal.
9. The scanning method as described in claim 8, characterized in that, Determining the touch detection result based on the reconstructed scan signal includes: Calculate the tip and centroid information of the reconstructed scan signal curve, and determine the touch detection result based on the tip and centroid information.