Touch panel and touch device

Abstract

The present disclosure relates to a touch panel and a touch device. The touch panel comprises a substrate, the substrate comprising a touch area and a frame area, the frame area being located at the periphery of the touch area; a plurality of first electrodes arranged in an array in the touch area; a second electrode arranged in the frame area and parallel to the first electrodes; and a control unit connected to both ends of the plurality of first electrodes and the second electrode; wherein the control unit controls any two electrodes parallel to each other to be conductive and form a coil; the control unit inputs the same first electrical signal to any two electrodes parallel to each other, so that the two electrodes form a differential signal group, and the differential signal group is used for inductive capacitive touch operation. The present disclosure sets the second electrode in the frame area at the periphery of the touch area, and makes the second electrode form a coil with the first electrode, so that the coil can cover the edge of the touch area, thereby improving the positioning performance of the touch panel on the edge of the touch area.

Description

Technical Field

[0001] This disclosure relates to the field of touch technology, specifically to a touch panel and a touch device. Background Technology

[0002] With the rapid development of technology, various new touch technologies are being increasingly widely applied in display devices. In touch devices, users can use a stylus to perform touch operations.

[0003] The touch panel inside the touch device can be equipped with an electrode array. Different electrodes in the electrode array are connected to form coils for transmitting and receiving. The coils can transmit excitation signals to the stylus to charge it, and can also receive electrical signals fed back by the stylus and analyze the energy distribution to determine the stylus's coordinates, pressure sensitivity, button information, etc.

[0004] However, because the coil cannot effectively cover the edge of the touch area, the positioning accuracy of the touch device will decrease when the stylus is located at the edge of the touch area. Summary of the Invention

[0005] In order to solve the above-mentioned problems in the related technologies, this disclosure provides a touch panel and a touch device.

[0006] A first aspect of this disclosure provides a touch panel, comprising: a substrate, the substrate including a touch area and a border area, the border area being located around the touch area;

[0007] Multiple first electrodes are arranged in an array in the touch area;

[0008] The second electrode is disposed in the frame area and parallel to the first electrode; and

[0009] A control unit is connected to both ends of the plurality of first electrodes and second electrodes;

[0010] The control unit controls any two of the parallel first and second electrodes to conduct electricity and form a coil.

[0011] The control unit inputs the same first electrical signal to any two parallel electrodes to form a differential signal group, which is used to sense capacitive touch operation.

[0012] In some embodiments, the resistance values ​​of the first electrode and the second electrode are equal or the resistance difference is within a first preset difference range.

[0013] In some embodiments, the width of the first electrode is greater than the width of the second electrode.

[0014] In some embodiments, the length values ​​of the first electrode and the second electrode are equal or the length difference is within a second preset difference range.

[0015] In some embodiments, the first electrode is one or more of a metal mesh conductive component and a transparent conductive component;

[0016] The second electrode is one or more of a metal mesh conductive component, a transparent conductive component, and a solid metal conductive component.

[0017] In some embodiments, there is a first gap between the center of the first electrode and the center of the adjacent second electrode;

[0018] There is a second spacing between the centers of two adjacent first electrodes;

[0019] The first spacing is less than or equal to the second spacing.

[0020] In some embodiments, the touch area includes an edge, and the second electrode is disposed adjacent to the edge;

[0021] The distance between the edge of the second electrode adjacent to the touch area and the edge is less than or equal to a first distance threshold.

[0022] In some embodiments, when the distance between the edge of the second electrode adjacent to the touch area and the edge is equal to a first distance threshold, the first distance is equal to the second distance.

[0023] In some embodiments, the number of edges is multiple, and at least a portion of the edges is adjacent to the second electrode.

[0024] In some embodiments, the substrate includes opposite first and second sides;

[0025] A first electrode and a second electrode arranged along a first direction are disposed on the first surface;

[0026] A first electrode and a second electrode arranged along a second direction are disposed on the second surface;

[0027] The first direction and the second direction have an angle between them.

[0028] In some embodiments, the first electrode and the second electrode include opposing first and second ends, and the control unit includes:

[0029] Multiple input terminals are connected to the second terminal and are used to input the first electrical signal to the first electrode and the second electrode or to generate a second electrical signal for generating an excitation signal.

[0030] The output terminal is connected to the second terminal and is used to connect the second terminal to a fixed level or to ground.

[0031] A control circuit is connected to the plurality of input terminals, the output terminal, the first terminal, and the second terminal, respectively. The control circuit is used to control the conduction state between the plurality of input terminals and the second terminal, the output terminal and the second terminal, and the first terminals of different electrodes.

[0032] The control circuit controls one of the plurality of input terminals to be connected to the second terminal of the Nth electrode and input the second electrical signal; the control circuit controls the output terminal to connect the second terminal of the Mth electrode to a fixed level or ground, so that the Nth electrode and the Mth electrode form a coil; and

[0033] The control circuit controls two of the plurality of input terminals to be connected to the first terminal of the P-th electrode and the first terminal of the Q-th electrode respectively and input the same first electrical signal, so that the P-th electrode and the Q-th electrode form the differential signal group;

[0034] N, M, P, and Q are positive integers. The Nth electrode and the Mth electrode are one of the plurality of first electrodes and second electrodes, and the Pth electrode and the Qth electrode are one of the plurality of first electrodes.

[0035] In some embodiments, when the P electrodes and the Q-th electrode form the differential signal group, the control circuit controls the output terminal to be connected to the second terminal of the remaining first electrode and the second terminal of the second electrode.

[0036] In some embodiments, a second aspect of this disclosure provides a touch device including a touch panel as described in any of the first aspects.

[0037] The touch panel provided in this disclosure can include the following beneficial effects: by providing a second electrode in the frame area around the touch area and enabling the second electrode to form a coil with the first electrode, the coil can cover the edge of the touch area, thereby improving the positioning performance of the touch panel at the edge of the touch area. Attached Figure Description

[0038] The above and other objects, features, and advantages of embodiments of this disclosure will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. Several embodiments of this disclosure are illustrated in the drawings by way of example and not limitation, in which:

[0039] Figure 1 This is a schematic diagram of the structure of a touch panel according to an embodiment of the present disclosure.

[0040] Figure 2 This is a schematic diagram of the structure of a touch panel according to an embodiment of the present disclosure.

[0041] Figure 3 This is a schematic diagram of the structure of a touch panel according to an embodiment of the present disclosure.

[0042] In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0043] The accompanying figure is labeled as follows:

[0044] 100. Substrate; 101. Touch area; 102. Frame area; 103. Edge;

[0045] 10. First electrode; 20. Second electrode;

[0046] 3. Control unit; 30. Control circuit; 40. Input terminal; 401. First input terminal; 402. Second input terminal; 50. Output terminal;

[0047] L1, first spacing; L2, second spacing; L3, third spacing. Detailed Implementation

[0048] The principles and spirit of this disclosure will now be described with reference to several exemplary embodiments. It should be understood that these embodiments are given merely to enable those skilled in the art to better understand and implement this disclosure, and are not intended to limit the scope of this disclosure in any way.

[0049] It should be noted that although the terms "first," "second," etc., are used herein to describe different modules, steps, and data in the embodiments of this disclosure, these terms are only for distinguishing between different modules, steps, and data, and do not indicate a specific order or degree of importance. In fact, the terms "first," "second," etc., can be used interchangeably.

[0050] The touch panel provided in this embodiment can be applied to a touch device, wherein the touch device can be any of the following: a capacitive touch panel, an electromagnetic touch panel, a touch display screen, a capacitive handwriting tablet, and an electromagnetic handwriting tablet.

[0051] For example, a touch device could be an electromagnetic writing tablet, a simple and quick interactive handwriting device. The electromagnetic writing tablet can be used in conjunction with an electromagnetic pen. The electromagnetic writing tablet may include an electromagnetic induction antenna board and a control board; the electromagnetic induction antenna board includes a transmitting coil and a receiving coil. The transmitting coil sends electromagnetic waves to the electromagnetic pen, and the receiving coil receives the resonant signal generated by the resonance between the electromagnetic waves sent by the electromagnetic pen and the transmitting coil. The control board amplifies the received signal and processes the data.

[0052] The transmitting coil on the electromagnetic induction antenna board can emit an excitation signal. The resonant circuit in the electromagnetic pen, after being excited by the excitation signal, can provide working energy for the electromagnetic pen. After the transmitting coil stops transmitting, the resonant circuit in the electromagnetic pen will oscillate and continue to decay. The receiving coil on the electromagnetic induction antenna board will receive the oscillation signal emitted by the electromagnetic pen, thereby realizing coordinate positioning and data transmission.

[0053] The stylus can be any type of stylus, such as an active capacitive stylus, a passive capacitive stylus, an active electromagnetic stylus, or a passive electromagnetic stylus.

[0054] For example, a stylus can be a passive capacitive stylus, which can be used with capacitive touch devices. A passive capacitive stylus can interact directly with the capacitive layer of the screen through a conductive material (such as a metal tip), achieving touch control by utilizing changes in human body current or the screen's electric field.

[0055] Passive capacitive pens can also incorporate resonant circuits and be used in conjunction with capacitive touch devices equipped with excitation and receiving coils. The excitation coil of the touch device emits an excitation signal, and the resonant circuit in the passive capacitive pen, when excited by the excitation signal, provides operating energy to the pen, enabling it to transmit wireless signals. The touch device receives the signals from the passive capacitive pen through the coils and capacitive sensors, thus confirming the pen's coordinates, pressure sensitivity, button presses, and other information.

[0056] In related technologies, the electrodes used to form the coil are all located inside the touch area. Therefore, the coil formed by different electrodes can only cover the area inside the touch area. When the stylus is located at the edge of the touch area, the coil formed by the electrodes cannot be directly aligned with the location of the stylus. This means that only one side of the coil can receive the feedback signal from the stylus relatively well, reducing the total amount of information that can be used for touch positioning and resulting in a decrease in positioning accuracy.

[0057] Figure 1 This is a schematic diagram of the structure of a touch panel according to an embodiment of the present disclosure.

[0058] In some embodiments, such as Figure 1 As shown, the touch panel may include: a substrate 100, a plurality of first electrodes 10, second electrodes 20, and a control unit 3. The substrate 100 can be used to provide mounting positions for other components of the touch panel and to provide wiring area for wiring connections between the various components. The substrate 100 may include a touch area 101 and a border area 102. The touch area 101 may be a sensing area in the touch panel used to detect touch operations, and the border area 102 is located around the touch area 101. The border area 102 may be a non-functional edge area surrounding the touch area 101.

[0059] Multiple first electrodes 10 can be arranged in an array in the touch area 101. For example, multiple first electrodes 10 can extend along a first direction and be arranged along a second direction. Second electrodes 20 can be disposed in the border area 102 and parallel to the first electrodes 10 disposed in the touch area 101.

[0060] The control unit 3 can be used to control the conduction relationship and conduction state of multiple electrodes. The control unit 3 can be connected to both ends of multiple first electrodes 10 and second electrodes 20. For example, the control unit 3 can be connected to both ends of multiple first electrodes 10 and second electrodes 20 respectively through wires, and the internal switching circuit of the control unit 3 can ground or connect different electrodes to a signal source, and enable different electrodes to conduct to each other.

[0061] The control unit 3 can control any two of the parallel first electrodes 10 and second electrodes 20 to conduct and form a coil. For example, the parallel first electrodes 10 and second electrodes 20 can be conducted to form a coil, or only the two parallel first electrodes 10 can be conducted to form a coil. The coil can be used to transmit excitation signals or receive electrical signals from the stylus. The excitation signal can be used to provide energy to the stylus used in conjunction with the touch device. The touch device can transmit energy to styluses requiring charging, including passive electromagnetic pens and passive capacitive pens, through the coil. The touch device can also receive electrical signals from the stylus through the coil to obtain device information and interaction information of the stylus.

[0062] The control unit 3 can input the same first electrical signal to any two parallel electrodes to form a differential signal group, which is used to sense capacitive touch operation. The first electrical signal can be an alternating current signal. For example, when a finger approaches one of the two electrodes, since the finger is a conductor, a capacitor is formed between the electrode the finger is approaching and ground. The current of the electrode the finger is approaching is shunted to ground, causing the electrical signal of the electrode the finger is approaching to attenuate. This, in turn, generates a voltage difference between the electrical signal of the other conducting electrode and the electrode that is conducting. By detecting the correspondence between this voltage difference and the electrodes, the touch position and trajectory of the finger can be determined, thus realizing the finger touch detection function.

[0063] The control unit 3 can control the first electrode 10 and the second electrode 20 to conduct and form a coil. The coil can cover the edge of the touch area 101 and at least a part of the frame area 102, thereby expanding the touch detection area of ​​the coil formed by the multiple electrodes from the inside of the touch area 101 to the frame area 102. When the stylus is located at the edge of the touch area 101, the first electrode 10 and the second electrode 20 can form a coil and make the stylus fall within the range corresponding to the coil. Both the first electrode 10 and the second electrode 20 can receive the electrical signal fed back from the stylus, thereby improving the positioning performance of the touch panel at the edge of the touch area 101.

[0064] In some embodiments, such as Figure 1 As shown, the resistance values ​​of the first electrode 10 and the second electrode 20 are equal or the resistance difference is within a first preset difference range. This ensures that the resistance value of the coil formed by the first electrode 10 and the second electrode 20 is basically consistent with the resistance value of the coil formed by the two first electrodes 10. Therefore, when transmitting and receiving the same electrical signal, the two coils can have similar or identical signal transmission and reception performance, thereby improving the parameter consistency of each coil formed by the electrodes. This reduces the parameter variables in the calculation process of the touch panel related circuits, which is beneficial to reducing the difficulty of related circuit design and algorithm design, and reducing the calibration difficulty of the touch panel.

[0065] Regarding the first preset difference range, when the resistance values ​​of the first electrode 10 and the second electrode 20 are basically equal, so that the parameters of each coil are basically consistent, due to the production process or design requirements, there can be a certain difference between the resistance values ​​of the first electrode 10 and the second electrode 20. The range of this difference is the first preset difference range.

[0066] In some embodiments, such as Figure 1 As shown, the width of the first electrode 10 is greater than the width of the second electrode 20. By reducing the width of the second electrode 20 disposed in the frame area 102, the wiring area occupied by the second electrode 20 can be reduced, and the total wiring area required by the first electrode 10 and the second electrode 20 can be reduced, thereby reducing the area of ​​the frame area 102 and improving the adaptability of the touch panel to narrow-bezel devices.

[0067] In some embodiments, such as Figure 1 As shown, the lengths of the first electrode 10 and the second electrode 20 are equal or the length difference is within a second preset range. By making the lengths of the first electrode 10 and the second electrode 20 substantially equal, the parameter consistency of the coil formed by the first electrode 10 and the second electrode 20, and the coil formed by the two first electrodes 10, can be improved. This can enhance the uniformity of coil energy distribution, reduce parameter variables in the calculation process of related circuits of the touch panel, and help reduce the difficulty of related circuit design and algorithm design, as well as the difficulty of touch panel calibration.

[0068] In some embodiments, the first electrode 10 is one or more of a metal mesh conductive component and a transparent conductive component. In the touch panel, the touch area 101 is both the touch detection area and the area where image display content passes through the substrate 100. Therefore, by configuring the first electrode 10 as a metal mesh conductive component and / or a transparent conductive component, the first electrode 10 can have good light transmittance, reducing interference with the image display content passing through the substrate 100. Furthermore, because the first electrode 10 has good light transmittance, the first electrode 10 can reduce its resistance by increasing its width without affecting the overall light transmittance performance of the touch area 101, thereby reducing the resistance of the coil formed by the first electrode 10 and improving the signal transmission and reception efficiency of the coil.

[0069] The second electrode 20 is one or more of a metal mesh conductive component, a transparent conductive component, and a solid metal conductive component.

[0070] Among them, solid metal conductive parts have lower resistance at the same width. Therefore, by configuring the second electrode 20 as a solid metal conductive part, the second electrode 20 can have a smaller width while maintaining a lower resistance, thereby reducing the wiring area occupied by the second electrode 20 and improving the adaptability of the touch panel to narrow bezel devices.

[0071] In some embodiments, the substrate 100 may be a transparent material to give it good light transmittance, allowing the image display content to pass through the substrate 100 for normal display, thus reducing interference from the substrate 100 on the image display content passing through the substrate 100. Exemplarily, the substrate 100 may be a transparent film, transparent glass, or other light-transmitting component capable of having electrodes disposed thereon.

[0072] In some embodiments, such as Figure 1 As shown, there is a first distance L1 between the center of the first electrode 10 and the center of the adjacent second electrode 20, and a second distance L2 between the centers of two adjacent first electrodes 10. The first distance L1 can be equal to the second distance L2, so that the width of the coil formed by the first electrode 10 and the second electrode 20 is basically the same as the width of the coil formed by the two first electrodes 10. This can improve the parameter consistency of each coil formed by the electrodes, reduce the parameter variables in the calculation process of the related circuit of the touch panel, and help reduce the difficulty of related circuit design and algorithm design, and reduce the calibration difficulty of the touch panel.

[0073] However, this disclosure is not limited to this. The first spacing L1 may also be smaller than the second spacing L2 to reduce the width of the coil formed by the first electrode 10 and the second electrode 20, reduce the area occupied by the wiring, and improve the adaptability of the touch panel to narrow bezel devices. Depending on the design requirements, the first spacing L1 may also be larger than the second spacing L2 to increase the coverage of the coil on the bezel area 102.

[0074] In some embodiments, such as Figure 1 As shown, the touch area 101 may include an edge 103, and the second electrode 20 may be disposed adjacent to the edge 103. A third distance L3 exists between the edge of the touch area 101 adjacent to the second electrode 20 and the edge 103 of the touch area 101. The third distance L3 is less than or equal to a first distance threshold. For example, the first distance threshold may be 5 mm, and the third distance L3 may be from 0 mm to 5 mm.

[0075] When the third distance L3 is equal to the first distance threshold, the second electrode 20 can be kept at a distance from the edge 103 of the touch area 101, and the width of the coil formed by the second electrode 20 and the first electrode 10 can be increased, so that the coil formed by the second electrode 20 and the first electrode 10 can cover a larger border area 102, thereby improving the touch positioning performance of the coil at the edge of the touch area 101.

[0076] When the third distance L3 is less than the first distance threshold, the distance between the second electrode 20 and the edge 103 of the touch area 101 can be reduced, thereby reducing the width of the coil formed by the second electrode 20 and the first electrode 10, reducing the area occupied by the second electrode 20 on the wiring area of ​​the frame area 102, and improving the adaptability of the touch panel to narrow frame devices.

[0077] In some embodiments, such as Figure 1 As shown, when the third spacing L3 is equal to the first distance threshold, the first spacing L1 can be equal to the second spacing L2. That is, the width of the coil formed by the first electrode 10 and the second electrode 20 is basically the same as the width of the coil formed by the two first electrodes 10. This can improve the parameter consistency of each coil formed by the electrodes, reduce the parameter variables in the calculation process of the touch panel related circuits, and help reduce the difficulty of related circuit design and algorithm design, and reduce the calibration difficulty of the touch panel.

[0078] In other embodiments, the third spacing L3 may also be greater than the first distance threshold, thereby further increasing the coil width formed by the first electrode 10 and the second electrode 20, so that the coil covers a larger area of ​​the border region 102.

[0079] Figure 2 This is a schematic diagram of the structure of a touch panel according to an embodiment of the present disclosure.

[0080] In some embodiments, such as Figure 1 and Figure 2 As shown, the number of edges 103 of the touch area 101 can be multiple, and at least a portion of the edges 103 of the touch area 101 are adjacent to the second electrode 20.

[0081] The second electrode 20 can be specifically configured to address whether the edge area of ​​the corresponding touch area 101 requires touch input, thereby improving the touch performance of specific areas to adapt to different touch performance requirements. For example, as shown... Figure 1 As shown, to enhance the touch performance of the left side of the touch area 101 in the illustration, a second electrode 20 can be provided in the corresponding border area 102. Another example is... Figure 2 As shown, to enhance the touch performance of the left and right sides of the touch area 101, a second electrode 20 can be provided in both corresponding border areas 102. Alternatively, a second electrode 20 can be provided in the top, bottom, left, and right sides of the border area 102 of the touch area 101.

[0082] Figure 3 This is a schematic diagram of the structure of a touch panel according to an embodiment of the present disclosure.

[0083] In some embodiments, such as Figure 3 As shown, the substrate 100 may include a first surface and a second surface opposite to each other. A first electrode 10 and a second electrode 20 arranged along a first direction may be disposed on the first surface, and a first electrode 10 and a second electrode 20 arranged along a second direction may be disposed on the second surface. The first direction and the second direction may have an included angle. For example, the first direction and the second direction may be two mutually perpendicular directions.

[0084] The multiple coils formed by the first electrode 10 and the second electrode 20 arranged along the first direction and the multiple differential signal groups are all arranged along the first direction. By sequentially turning on the multiple coils arranged along the first direction, the relationship curve between the electromagnetic induction signal intensity and the coordinates of the touch area 101 in the first direction can be obtained. By sequentially turning on the multiple differential signal groups arranged along the first direction, the relationship curve between the capacitive touch signal intensity and the coordinates of the touch area 101 in the first direction can be obtained. According to the relationship curve, the first touch panel can obtain the touch coordinates of electromagnetic touch and capacitive touch in the first direction.

[0085] Multiple coils and multiple differential signals formed by the first electrode 10 and the second electrode 20 arranged along the second direction can obtain a curve showing the relationship between the electromagnetic induction signal intensity and the coordinates of the touch area 101 in the second direction by sequentially turning on the multiple coils arranged along the second direction. By sequentially turning on the multiple differential signal groups arranged along the second direction, a curve showing the relationship between the capacitive touch signal intensity and the coordinates of the touch area 101 in the second direction can be obtained. Based on the relationship curve, the second touch panel can obtain the touch coordinates of electromagnetic touch and capacitive touch in the second direction.

[0086] By combining the touch coordinates in the first direction and the touch coordinates in the second direction, it is possible to locate the stylus and the finger.

[0087] By placing electrodes with different arrangement directions on two different sides of the substrate 100, electrodes with different arrangement directions can share the same substrate 100 as a skeleton structure, thereby reducing the number of substrates 100, reducing the installation space of the touch panel, and helping to reduce the overall thickness of the touch device. Furthermore, by extending the traces of electrodes with different arrangement directions on different surfaces, crossings between traces with different directions and crossings between traces and electrodes are avoided.

[0088] However, this disclosure is not limited to this. There may be multiple substrates 100, and electrodes with different arrangement directions may be disposed on different substrates 100.

[0089] In some embodiments, such as Figures 1 to 3 As shown, the first electrode 10 and the second electrode 20 may include opposing first and second ends. The control unit 3 may include: multiple input terminals 40, an output terminal 50, and a control circuit 30.

[0090] Multiple input terminals 40 can be connected to the second terminal for inputting a first electrical signal to the first electrode 10 and the second electrode 20, or a second electrical signal for generating an excitation signal. The number of input terminals 40 can be multiple; for example, the multiple input terminals 40 may include a first input terminal 401 and a second input terminal 402. An output terminal 50 can be connected to the second terminal for connecting the second terminal to a fixed voltage level or grounding. A control circuit 30 is connected to the multiple input terminals 40, the output terminal 50, the first terminal, and the second terminal, respectively. The control circuit 30 is used to control the conduction state between the multiple input terminals 40 and the first terminal, and between the output terminal 50 and the second terminal.

[0091] The control circuit 30 controls one of the multiple input terminals 40 to be connected to the second terminal of the Nth electrode and input a second electrical signal. The control circuit 30 controls the output terminal 50 to connect the second terminal of the Mth electrode to a fixed level or ground, and to connect the first terminals of the Nth electrode and the first terminals of the Mth electrode, so that the Nth electrode and the Mth electrode form a coil. The coil can be used to receive electrical signals from the stylus or to generate excitation signals based on the second electrical signal. Here, N and M are positive integers, and the Nth electrode and the Mth electrode are one of the multiple first electrodes 10 and second electrodes 20. For example, N and M can be positive integers with a difference of 2 or 3, so that the coil formed by the Nth electrode and the Mth electrode can have a larger coverage area.

[0092] The control circuit 30 controls two of the multiple input terminals 40 to be connected to the second terminals of the P-th electrode and the Q-th electrode, respectively, and input the same first electrical signal. Simultaneously, it keeps the first terminals of the P-th electrode and the Q-th electrode in an open-circuit state, so that the P-th electrode and the Q-th electrode form a differential signal group. The circuit then identifies the touch information of a finger or capacitive stylus based on the changes in the electrical signals of the P-th electrode and the Q-th electrode. Here, P and Q are positive integers, and the P-th electrode and the Q-th electrode are one of the multiple first electrodes 10. For example, P and Q can be positive integers with a difference of 1, making the P-th electrode and the Q-th electrode adjacent electrodes to improve the positioning accuracy of the finger or capacitive stylus touch signal.

[0093] With the above configuration, the first electrode 10 and the second electrode 20 can be controlled to form a coil or the first electrode 10 can be controlled to form a differential signal group, thereby realizing the integration of electromagnetic touch detection and capacitive touch detection on the same touch panel.

[0094] Since the second electrode 20 is located in the frame area 102, a finger or capacitive stylus will not approach the second electrode 20. Therefore, only two different first electrodes 10 can be turned on, so that the first electrodes 10 that can effectively sense a finger or capacitive stylus form a differential signal group, without turning on the second electrode 20 as an electrode in the differential signal group.

[0095] When the first electrode 10 forms a differential signal group, the second electrode 20 can be used to provide a stable electromagnetic environment for the differential signal group, reduce the interference of external electromagnetic signals on the differential signal group formed by the first electrode 10, and thus improve the touch positioning accuracy of the differential signal group.

[0096] In some embodiments, such as Figures 1 to 3As shown, the control circuit 30 may include a switch group. When the first electrode 10 and the second electrode 20 form a coil, the control circuit 30 can use the switch group to connect the second ends of the first electrode 10 and the second electrode 20 to the input terminal 40 and the output terminal 50, respectively. Furthermore, the control circuit 30 can connect the first ends of the first electrode 10 and the second electrode 20, thus creating a series connection between the first electrode 10 and the second electrode 20. This allows the electrical signal input from the input terminal 40 to the first electrode 10 to flow to the second electrode 20. By connecting the first electrode 10 and the second electrode 20 to form a coil, and making the coil cover the edge area of ​​the touch area 101 and at least a part of the frame area 102, the touch detection area of ​​the coil formed by the multiple electrodes is expanded from the inside of the touch area 101 to the frame area 102. When the stylus is located at the edge of the touch area 101, the first electrode 10 and the second electrode 20 can form a coil and make the stylus fall within the range corresponding to the coil. Both the first electrode 10 and the second electrode 20 can receive the electrical signal fed back from the stylus well, thereby improving the positioning performance of the touch panel at the edge of the touch area 101.

[0097] In some embodiments, when the P electrodes and the Q-th electrode form a differential signal group, the control circuit 30 connects the output terminal 50 to the second terminals of the remaining first electrodes 10 and the second electrode 20, thereby grounding or connecting the other electrodes, including the second electrode 20, to a fixed voltage level. This operation maintains the non-signal electrodes uniformly on an equipotential reference surface, thereby forming a nearly uniform electromagnetic shielding layer around the differential signal group. This shielding layer can significantly absorb or reflect external electromagnetic noise, blocking its coupling into the differential signal transmission path, while reducing crosstalk between electrodes caused by potential fluctuations. The differential signal group operates in a highly uniform electromagnetic environment, enhancing its ability to suppress external interference, thereby improving the overall anti-interference performance of the touch panel. When the differential signal group is close to the edge of the touch area 101, since the second electrode 20 is located in the frame area, the grounded or fixed-level second electrode 20 can effectively absorb or reflect the environmental noise transmitted from the frame area, blocking it from coupling inward to the differential signal group, thereby significantly suppressing external magnetic field interference, further reducing the interference of external electromagnetic signals on the differential signal group, improving the anti-interference performance of the differential signal group when it is located at the edge of the touch area 101, and further improving the reliability of touch positioning at the edge of the touch area 101 and the anti-interference performance of the touch panel.

[0098] Based on the same concept, this disclosure also provides a touch device, which may include a touch panel. The control unit 3 of the touch panel can control the first electrode 10 located in the touch area 101 and the second electrode 20 located in the border area 102 to conduct and form a coil. The coil can cover the edge of the touch area 101 and at least a part of the border area 102, thereby expanding the touch detection area of ​​the coil formed by the multiple electrodes from the inside of the touch area 101 to the border area 102. When the stylus used with the touch device is located at the edge of the touch area 101, the first electrode 10 and the second electrode 20 can form a coil and make the stylus fall within the range corresponding to the coil. Both the first electrode 10 and the second electrode 20 can receive the electrical signal fed back from the stylus well, which significantly improves the detection accuracy and signal strength of the touch point in the edge area of ​​the touch area 101, reduces the positioning deviation of the edge of the touch area 101, and thus enhances the overall response performance and accuracy of the touch panel to edge touch events.

[0099] The foregoing description of embodiments of this disclosure has been provided for purposes of illustration and description. The foregoing description is not exhaustive and is not intended to limit this disclosure to the exact forms disclosed; various modifications and variations may be made in accordance with the foregoing teachings, or may be derived from practice of this disclosure. These embodiments were chosen and described to illustrate the principles of this disclosure and its practical application, enabling those skilled in the art to utilize this disclosure in various implementations and with various modifications to suit the particular purpose conceived.

[0100] It should be understood that all the embodiments described above can be combined with each other without conflict, and for any part not described in detail in a certain embodiment, please refer to the relevant description in other embodiments.

[0101] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The singular forms “a,” “the,” and “the” as used in the embodiments of this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0102] In the description of this disclosure, unless otherwise specified or stated, the term "a plurality of" means at least two; unless otherwise specified or stated, the terms "joining," "attaching," "installing," "connecting," and "linking" should be interpreted broadly, for example, they can be fixed connections or movable connections; they can be non-detachable connections or detachable connections, and non-detachable connections can be integral connections or welded connections; they can be mechanical connections or electrical connections; they can be internal communication between two components or the interaction between two components; they can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0103] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0104] In the description of this disclosure, directional terms are used to locate components in accordance with the accompanying drawings, including but not limited to spatial relationship descriptors such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential." Since the described components can be located in multiple different orientations, these directional terms are for illustrative purposes only and do not constitute limitations. This technical solution allows for adjustments to the implementation without departing from the design concept, including but not limited to structural or logical changes; therefore, the detailed description in this disclosure should not be construed as a limitation of this technical solution.

[0105] It should be noted that although the terms "first," "second," etc., are used herein to describe different modules, steps, and data in the embodiments of this disclosure, these terms are only for distinguishing between different modules, steps, and data, and do not indicate a specific order or degree of importance. In fact, the terms "first," "second," etc., can be used interchangeably.

[0106] The foregoing description of embodiments of this disclosure has been provided for purposes of illustration and description. The foregoing description is not exhaustive and is not intended to limit this disclosure to the exact forms disclosed; various modifications and variations may be made in accordance with the foregoing teachings, or may be derived from practice of this disclosure. These embodiments were chosen and described to illustrate the principles of this disclosure and its practical application, enabling those skilled in the art to utilize this disclosure in various implementations and with various modifications to suit the particular purpose conceived.

Claims

1. A touch panel, characterized in that, include: The substrate (100) includes a touch area (101) and a border area (102), the border area (102) being located around the touch area (101); Multiple first electrodes (10) are arranged in an array in the touch area (101); The second electrode (20) is disposed in the border area (102) and is parallel to the first electrode (10); as well as The control unit (3) is connected to both ends of the plurality of first electrodes (10) and second electrodes (20); The control unit (3) controls any two of the parallel first electrode (10) and second electrode (20) to conduct and form a coil; The control unit (3) inputs the same first electrical signal to any two parallel electrodes so that the two electrodes form a differential signal group, which is used to sense capacitive touch operation; The first electrode (10) and the second electrode (20) each have a first end and a second end opposite to each other, and the control unit (3) includes: Multiple input terminals (40), which are connected to the second terminal, are used to input the first electrical signal to the first electrode (10) and the second electrode (20) or to generate a second electrical signal for generating an excitation signal; The output terminal (50) is connected to the second terminal and is used to connect the second terminal to a fixed level or to ground. The control circuit (30) is connected to the plurality of input terminals (40), the output terminal (50), the first terminal and the second terminal respectively. The control circuit (30) is used to control the conduction state between the plurality of input terminals (40) and the second terminal, the output terminal (50) and the second terminal, and the first terminal of different electrodes. The control circuit (30) controls one of the plurality of input terminals (40) to be connected to the second terminal of the Nth electrode and input the second electrical signal. The control circuit (30) controls the output terminal (50) to connect the second terminal of the Mth electrode to a fixed level or ground, so that the Nth electrode and the Mth electrode form a coil. The control circuit (30) controls two of the plurality of input terminals (40) to be connected to the second terminal of the P-th electrode and the second terminal of the Q-th electrode respectively and input the same first electrical signal, so that the P-th electrode and the Q-th electrode form the differential signal group; N, M, P and Q are positive integers, the Nth electrode and the Mth electrode are one of the plurality of first electrodes (10) and second electrodes (20), and the Pth electrode and the Qth electrode are one of the plurality of first electrodes (10).

2. The touch panel according to claim 1, characterized in that, The resistance values ​​of the first electrode (10) and the second electrode (20) are equal or the resistance difference is within a first preset difference range.

3. The touch panel according to claim 2, characterized in that, The width of the first electrode (10) is greater than the width of the second electrode (20).

4. The touch panel according to claim 2, characterized in that, The length values ​​of the first electrode (10) and the second electrode (20) are equal or the length difference is within a second preset difference range.

5. The touch panel according to claim 2, characterized in that, The first electrode (10) is one or more of a metal mesh conductive component and a transparent conductive component; The second electrode (20) is one or more of a metal mesh conductive component, a transparent conductive component, and a solid metal conductive component.

6. The touch panel according to claim 1, characterized in that, There is a first gap (L1) between the center of the first electrode (10) and the center of the adjacent second electrode (20); There is a second spacing (L2) between the centers of two adjacent first electrodes (10); The first spacing (L1) is less than or equal to the second spacing (L2).

7. The touch panel according to claim 6, characterized in that, The touch area (101) includes an edge (103), and the second electrode (20) is disposed adjacent to the edge (103); The distance between the edge of the second electrode (20) adjacent to the touch area (101) and the edge (103) is less than or equal to a first distance threshold.

8. The touch panel according to claim 7, characterized in that, When the distance between the edge of the second electrode (20) adjacent to the edge of the touch area (101) and the edge (103) is equal to the first distance threshold, the first distance (L1) is equal to the second distance (L2).

9. The touch panel according to claim 7, characterized in that, The number of edges (103) is multiple, and at least a portion of the edges (103) are adjacent to the second electrode (20).

10. The touch panel according to claim 1, characterized in that, The substrate (100) includes opposite first and second sides; A first electrode (10) and a second electrode (20) arranged along a first direction are disposed on the first surface; A first electrode (10) and a second electrode (20) arranged along a second direction are disposed on the second surface; The first direction and the second direction have an angle between them.

11. The touch panel according to any one of claims 1-10, characterized in that, When the P electrodes and the Q-th electrode form the differential signal group, the control circuit (30) controls the output terminal (50) to be connected to the second terminal of the remaining first electrode (10) and the second terminal of the second electrode (20).

12. A touch device, characterized in that, include: The touch panel as described in any one of claims 1-11.

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