Touch panel, control method thereof and touch equipment

Abstract

The invention provides a touch panel, a control method thereof and touch equipment, relates to the technical field of touch, and aims to reduce the probability of false triggering. The touch panel comprises a substrate, a pressure detection device, a touch electrode and a controller, the pressure detection device and the touch electrode are both arranged on the substrate, under the condition that the touch panel is touched, the pressure detection device is used for detecting a pressure change value and generating a first electric signal, the touch electrode is used for detecting a capacitance change value, and the controller is used for controlling the capacitance change value. And generating a second electric signal for determining the touch position. The controller is electrically connected with the pressure detection device and the touch electrode, and the controller can receive the first electric signal and the second electric signal and adjust a pressure triggering threshold value corresponding to the pressure detection device according to the distance between the touch position and the pressure detection device. And under the condition that the pressure change value is greater than or equal to the pressure trigger threshold value, the controller outputs a trigger control signal. The touch panel can be applied to the electronic equipment to realize the touch function of the equipment.

Description

Technical Field

[0001] The present application relates to the field of touch technology, and in particular to a touch panel and a control method thereof, and a touch device. Background Art

[0002] At present, touch technology has become the mainstream interaction method between people and electronic devices. Touch technology can be based on capacitive detection technology. However, capacitive detection is easily affected by the environment. For example, in the case of electrical interference or high water vapor, false triggering problems are prone to occur. Summary of the invention

[0003] The embodiments of the present application provide a touch panel and a control method thereof, and a touch device, aiming to reduce the probability of false triggering.

[0004] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0005] In the first aspect, a touch panel is provided, which includes a substrate, a pressure detection device, a touch electrode and a controller. The pressure detection device and the touch electrode are both arranged on the substrate. When the touch panel is touched, the pressure detection device is used to detect the pressure change value and generate a first electrical signal, and the touch electrode is used to detect the capacitance change value and generate a second electrical signal. The multiple second electrical signals are used to determine the touch position of the touch panel. The controller is electrically connected to the pressure detection device and the touch electrode. The controller can receive the first electrical signal and the second electrical signal, and adjust the pressure trigger threshold value corresponding to the pressure detection device according to the distance between the touch position and the pressure detection device. And, when the pressure change value is greater than or equal to the pressure trigger threshold value, the controller outputs a trigger control signal.

[0006] The touch panel provided by the above-mentioned embodiment of the present application, when the touch panel is touched, detects the pressure change value through the pressure detection device, and detects the capacitance change value through multiple touch electrodes to determine the touch position of the touch panel. The controller can adjust the pressure trigger threshold value of the pressure detection device according to the distance between the touch position and the pressure detection device, realizing the combination of capacitance detection and pressure detection. Furthermore, when the detected pressure change value is greater than or equal to the pressure trigger threshold value, the controller can output a trigger control signal to control the next action, avoiding the problem of easy mis-touch of single pressure detection or capacitance detection, and improving the trigger experience of the touch panel.

[0007] In some embodiments, when the pressure applied by the touch remains unchanged, as the distance between the touch position and the pressure detection device increases, the pressure change value that the pressure detection device can detect will decrease. Therefore, as the distance between the touch position and the pressure detection device increases, the controller can lower the pressure trigger threshold value, so that when the distance between the touch position and the pressure detection device is large, the pressure detection device can be triggered by detecting a smaller pressure change value. In other words, the probability of the pressure detection device being triggered is roughly the same when the same force is used to touch any position in the touch area, which is conducive to improving the consistency of the pressure trigger experience.

[0008] In some embodiments, the controller further adjusts the capacitance trigger threshold corresponding to each touch electrode according to the pressure change value, and outputs a trigger control signal when the pressure change value is greater than or equal to the pressure trigger threshold value and the capacitance change value included in the second electrical signal generated by at least one touch electrode is greater than or equal to the corresponding capacitance trigger threshold value.

[0009] In the above embodiment, when the touch panel is touched, the controller can also adjust the capacitance trigger threshold value corresponding to each touch electrode according to the pressure change value, thereby realizing the combination of pressure detection and capacitance detection. Further, when the detected pressure change value is greater than or equal to the pressure trigger threshold value, and the capacitance change value detected by at least one touch electrode is greater than or equal to the corresponding capacitance trigger threshold value, the controller can output a trigger control signal to control the next action. By combining the pressure detection device and the trigger logic of the touch electrode, the problem of single trigger logic and easy accidental touch is avoided, and the trigger experience of the touch panel is further improved.

[0010] In some embodiments, as the pressure change value increases, the controller can lower the capacitance trigger threshold of the touch electrode. In this way, when the pressure change value is large, the touch electrode can detect a smaller capacitance change value and be triggered, making the touch panel suitable for application scenarios with smaller capacitance change values, for example, suitable for situations where the user touches the panel while wearing gloves.

[0011] In some embodiments, the touch panel includes a plurality of pressure detection devices, the touch panel includes a plurality of first touch areas, and each pressure detection device and at least one touch electrode are arranged in the same first touch area. The controller is configured to receive a first electrical signal from the pressure detection device in the same first touch area, and a second electrical signal from the touch electrode, and output a trigger control signal when the pressure change value included in the first electrical signal is greater than or equal to the pressure trigger threshold value, and the capacitance change value included in the second electrical signal is greater than or equal to the capacitance trigger threshold value.

[0012] By increasing the number of pressure detection devices, the detection coverage of the pressure detection devices in the touch panel is expanded. The controller will only output a trigger control signal when both the pressure detection device and the touch electrode are triggered in the first touch area where the touch position is located, thereby improving the touch panel's ability to prevent accidental touches.

[0013] In some embodiments, a plurality of first touch control areas are arranged adjacent to each other, the touch panel further comprises at least one second touch control area, the second touch control area is located between two adjacent first touch control areas, and at least one touch control electrode is arranged in the second touch control area. The controller is configured to receive two first electrical signals from the pressure detection device of the two adjacent first touch control areas, and receive a second electrical signal from the touch control electrode of the second touch control area, and output a trigger control signal when the difference between the pressure change values ​​contained in the two first electrical signals is less than a reference threshold value, and the capacitance change value contained in the second electrical signal is greater than or equal to the capacitance trigger threshold value.

[0014] By increasing the number of pressure detection devices, the detection coverage of the pressure detection devices in the touch panel is expanded. Even if an area outside the pressure detection device is touched, the controller can trigger the next action by comparing the pressure change values ​​detected by different pressure detection devices and detecting whether the touch electrodes in the area are triggered, thereby improving the touch panel's ability to prevent accidental touches.

[0015] In some embodiments, the controller adjusts the pressure trigger threshold value according to the distance between the touch position and the pressure detection device and the number of touch electrodes corresponding to the touch position.

[0016] It is understandable that when a finger touches the touch panel, the touch position may only cover one touch electrode. When a palm touches the touch panel, the touch position may cover multiple adjacent touch electrodes. The controller can adjust the pressure trigger threshold value according to the distance between the touch position and the pressure detection device and the number of touch electrodes corresponding to the touch position, thereby improving the adjustment accuracy of the pressure trigger threshold value.

[0017] In some embodiments, each touch electrode corresponds to a pressure trigger threshold value, and different numbers of touch electrodes correspond to different pressure trigger threshold values. The controller can obtain the corresponding pressure trigger threshold value according to the distance between the touch position and the pressure detection device and the number of touch electrodes corresponding to the touch position.

[0018] By establishing a one-to-one correspondence between touch electrodes and pressure trigger thresholds, the controller detects the touch position and the number of touch electrodes corresponding to the touch position, and can find the corresponding pressure trigger threshold based on the above correspondence. When the accuracy of touch position detection is improved, it is conducive to more detailed adjustment of the pressure trigger threshold.

[0019] In some embodiments, a plurality of touch electrodes are disposed around the pressure detection device.

[0020] In some embodiments, the controller includes a preprocessing circuit and a control circuit. The preprocessing circuit is electrically connected to the pressure detection device and the touch electrode. The preprocessing circuit is configured to receive a first electrical signal and a second electrical signal, and adjust the pressure trigger threshold value corresponding to the pressure detection device according to the distance between the touch position and the pressure detection device, and adjust the capacitance trigger threshold value corresponding to the touch electrode according to the pressure change value. And, when the pressure change value is greater than or equal to the pressure trigger threshold value, and the capacitance change value is greater than or equal to the capacitance trigger threshold value, a trigger signal is output. The control circuit is electrically connected to the preprocessing circuit, and the control circuit is configured to receive a trigger signal and output a trigger control signal. The preprocessing circuit can be, for example, an analog front-end chip, and the control circuit can be, for example, a microcontroller unit.

[0021] In some embodiments, the touch panel further includes a cover plate and an elastic member, the cover plate covers the pressure detection device and the touch electrode, and the elastic member is disposed between the cover plate and the substrate.

[0022] When a person touches the cover plate, the pressure will cause the cover plate to deform, and then the pressure can be transmitted to the pressure detection device and the elastic member. When the elastic member is compressed and deformed, the pressure detection device can detect the change in pressure and generate a first electrical signal containing the pressure change value. When the person removes the pressure, the elastic member recovers the deformation and generates an elastic force, which can be applied to the cover plate to restore the deformation of the cover plate.

[0023] In a second aspect, a control method for a touch panel is provided, the control method comprising: when the touch panel is touched, a pressure detection device generates a first electrical signal including a pressure change value, and a plurality of touch electrodes generate a plurality of second electrical signals including a capacitance change value, and the plurality of second electrical signals are used to determine a touch position of the touch panel. A controller receives the first electrical signal and the plurality of second electrical signals, adjusts a pressure trigger threshold value corresponding to the pressure detection device according to a distance between the touch position and the pressure detection device, and outputs a trigger control signal when the pressure change value is greater than or equal to the pressure trigger threshold value.

[0024] In the control method provided by the above-mentioned embodiments of the present application, the controller adjusts the pressure trigger threshold value corresponding to the pressure detection device according to the distance between the touch position and the pressure detection device. When the pressure change value detected by the pressure detection device is greater than or equal to its pressure trigger threshold value, that is, when the pressure detection device is triggered, the controller outputs a trigger control signal to control the next action. This control method realizes the combination of capacitance detection and pressure detection, avoids the problem of accidental touch of single pressure detection or capacitance detection, and improves the trigger experience of the touch panel.

[0025] In some embodiments, the controller also adjusts the capacitance trigger threshold value corresponding to each touch electrode according to the pressure change value, and outputs a trigger control signal when the pressure change value is greater than or equal to the pressure trigger threshold value and the capacitance change value contained in the second electrical signal generated by at least one touch electrode is greater than or equal to the corresponding capacitance trigger threshold value.

[0026] When the pressure detection device and at least one touch electrode are both triggered, the controller outputs a trigger control signal to control the next action. This control method realizes the combination of the trigger logic of the pressure detection device and the touch electrode, avoids the problem of single trigger logic and easy accidental touch, and further improves the trigger experience of the touch panel.

[0027] In a third aspect, a touch device is provided, which includes a trigger device and the touch panel in the above embodiment, the trigger device is electrically connected to the touch panel, and the trigger device is configured to perform a trigger operation under the control of a trigger control signal from the touch panel.

[0028] It can be understood that the beneficial effects that can be achieved by the electronic device provided by the above embodiments of the present application can refer to the beneficial effects of the touch panel mentioned above, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the present application, the following is a brief introduction to the drawings required for use in some embodiments of the present application. Obviously, the drawings described below are only drawings of some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams, and are not intended to limit the actual size of the product involved in the embodiments of the present application, the actual process of the method, the actual timing of the signal, etc.

[0030] Figure 1 A structural diagram of a touch panel provided in an embodiment of the present application;

[0031] Figure 2 for Figure 1 A cross-sectional view of the touch panel along section line AA';

[0032] Figure 3 A circuit structure diagram of a touch panel provided in an embodiment of the present application;

[0033] Figure 4 Another circuit structure diagram of the touch panel provided in the embodiment of the present application;

[0034] Figure 5 Another structural diagram of a touch panel provided in an embodiment of the present application;

[0035] Figure 6 for Figure 5 A cross-sectional view of the touch panel along section line BB';

[0036] Figure 7 Another structural diagram of a touch panel provided in an embodiment of the present application;

[0037] Figure 8 for Figure 7 A cross-sectional view of the touch panel along section line CC';

[0038] Fig. 9 and Fig.10 A control flow chart of a touch panel provided in an embodiment of the present application;

[0039] Fig.11 This is a structural diagram of the smart door lock provided in an embodiment of the present application. DETAILED DESCRIPTION

[0040] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments provided by the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present application.

[0041] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to has a specific orientation, is constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0042] Unless the context requires otherwise, throughout the specification and claims, the term "including" is to be interpreted as an open, inclusive meaning, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "exemplarily" or "some examples" and the like are intended to indicate that specific features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present application. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics described may be included in any one or more embodiments or examples in any appropriate manner.

[0043] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "plurality" means two or more.

[0044] When describing some embodiments, the expression "connected" and its derivatives may be used. For example, when describing some embodiments, the term "connected" may be used to indicate that two or more components have direct physical or electrical contact with each other.

[0045] “At least one of A, B or C” includes the following combinations of A, B and C: A only, B only, C only, a combination of A and B, a combination of A and C, a combination of B and C, and a combination of A, B and C.

[0046] An embodiment of the present application provides a touch panel. Figure 1 A structural diagram of a touch panel provided in an embodiment of the present application; Figure 2 for Figure 1 A cross-sectional view of the touch panel along section line AA'; Figure 3 A circuit architecture diagram of a touch panel provided in an embodiment of the present application.

[0047] See also Figure 1 to Figure 3 The touch panel 1 includes a substrate 10, a pressure detection device 11, a touch electrode 12 and a controller 13. The pressure detection device 11 is disposed on the substrate 10. The pressure detection device 11 can generate a first electrical signal including a pressure change value when the touch panel 1 is touched. A plurality of touch electrodes 12 are disposed on the substrate 10. The plurality of touch electrodes 12 can generate a plurality of second electrical signals including a capacitance change value when the touch panel 1 is touched. The plurality of second electrical signals can be used to determine the touch position of the touch panel 1.

[0048] For example, on the plane XY, the touch area of ​​the touch panel 1 includes a middle area A1 and an edge area A2 surrounding the middle area A1, the pressure detection device 11 can be arranged in the middle area A1, and the plurality of touch electrodes 12 can be arranged in the edge area A2, that is, the plurality of touch electrodes 12 are arranged around the pressure detection device 11. In other examples, on the plane XY, the pressure detection device 11 and the plurality of touch electrodes 12 can be randomly arranged, and the embodiments of the present application are not limited to this.

[0049] Exemplarily, the touch panel 1 further includes a cover plate 14 and an elastic member 15 . The cover plate 14 covers the pressure detection device 11 and the touch electrode 12 . The elastic member 15 is disposed between the cover plate 14 and the substrate 10 . The elastic member 15 may be, for example, a spring or a shrapnel.

[0050] When a person touches the cover plate 14, the pressure will cause the cover plate 14 to deform, and then the pressure can be transmitted to the pressure detection device 11 and the elastic member 15. When the elastic member 15 is compressed and deformed, the pressure detection device 11 can detect the change in pressure and generate a first electrical signal containing the pressure change value. When the person removes the pressure, the elastic member 15 recovers the deformation and generates an elastic force, which can be applied to the cover plate 14 to restore the deformation of the cover plate 14.

[0051] Typically, the touch panel 1 further includes a ground electrode disposed on the substrate 10. A capacitance is generated between each touch electrode 12 and the ground electrode. The capacitance may also be referred to as an "environmental capacitance" and the capacitance value is relatively small. When a human hand touches the cover plate 14, a relatively large capacitance is generated between each touch electrode 12 and the finger, and a second electrical signal including a capacitance change value is generated. According to the capacitance change value detected by each touch electrode 12, the touch position information of the human hand can be determined.

[0052] Exemplarily, the controller 13 may be disposed on the substrate 10 or may not be disposed on the substrate 10 , and the embodiments of the present application are not limited to this.

[0053] See also Figure 3 The controller 13 is electrically connected to the pressure detection device 11 and the plurality of touch electrodes 12. The controller 13 can receive a first electrical signal from the pressure detection device 11 to obtain a pressure change value. The controller 13 can also receive a plurality of second electrical signals from the plurality of touch electrodes 12 to obtain touch position information. The controller 13 can adjust the pressure trigger threshold value corresponding to the pressure detection device 11 according to the distance between the touch position and the pressure detection device 11.

[0054] It is understandable that the "position information of the pressure detection device 11" can be obtained through pre-testing and written into the controller 13. The controller 13 can obtain the distance between the touch position information and the position information of the pressure detection device 11, and the "distance between the touch position and the pressure detection device 11" can be, for example, the distance between the two along the plane XY.

[0055] Each pressure detection device 11 corresponds to a pressure-triggered original threshold value. The controller 13 can increase or decrease the pressure-triggered original threshold value of the pressure detection device 11 according to the distance between the touch position and the pressure detection device 11 to adjust the pressure trigger threshold value of the pressure detection device 11.

[0056] For example, when the pressure applied by the touch remains unchanged, as the distance between the touch position and the pressure detection device 11 increases, the pressure change value that the pressure detection device 11 can detect will decrease. Therefore, as the distance between the touch position and the pressure detection device 11 increases, the controller 13 can lower the pressure trigger threshold value, so that when the distance between the touch position and the pressure detection device 11 is large, the pressure detection device 11 can detect a smaller pressure change value to achieve triggering. In other words, the probability of the pressure detection device 11 being triggered is roughly the same when the same force is used to touch any position in the touch control area, which is conducive to improving the consistency of the pressure triggering experience.

[0057] Then, the controller 13 can also make a trigger judgment. For example, when the pressure change value detected by the pressure detection device 11 is greater than or equal to its pressure trigger threshold value, that is, when the pressure detection device 11 is triggered, the controller 13 outputs a trigger control signal to control the next action.

[0058] In the above embodiment of the present application, when the touch panel 1 is touched, the pressure change value is detected by the pressure detection device 11, and the capacitance change value is detected by the multiple touch electrodes 12 to determine the touch position of the touch panel. The controller 13 can adjust the pressure trigger threshold value of the pressure detection device 11 according to the distance between the touch position and the pressure detection device 11, realizing the combination of capacitance detection and pressure detection. Furthermore, when the detected pressure change value is greater than or equal to the pressure trigger threshold value, the controller 13 can output a trigger control signal to control the next action, avoiding the problem of easy mis-touch of single pressure detection or capacitance detection, and improving the trigger experience of the touch panel 1.

[0059] In some embodiments, the controller 13 may further adjust the capacitance trigger threshold corresponding to each touch electrode 12 according to the pressure change value.

[0060] It is understandable that each touch electrode 12 corresponds to a capacitance triggering original threshold value, and the size of the capacitance triggering original threshold value depends on factors such as the area of ​​the touch electrode 12 along the plane XY and the material of the touch electrode 12. The controller 13 can increase or decrease the capacitance triggering original threshold value of the touch electrode 12 according to the pressure change value to adjust the capacitance triggering threshold value of the touch electrode 12.

[0061] Exemplarily, as the pressure change value increases, the controller 13 can lower the capacitance trigger threshold value of the touch electrode 12. In this way, when the pressure change value is large, the touch electrode 12 can detect a smaller capacitance change value and be triggered, making the touch panel 1 suitable for application scenarios with smaller capacitance change values, for example, suitable for situations where the user touches the touch panel while wearing gloves.

[0062] Based on this, when the pressure change value detected by the pressure detection device 11 is greater than or equal to its pressure trigger threshold value, and the capacitance change value detected by at least one touch electrode 12 is greater than or equal to the corresponding capacitance trigger threshold value, that is, when the pressure detection device 11 and at least one touch electrode 12 are both triggered, the controller 13 outputs a trigger control signal to control the next action.

[0063] In the above-mentioned embodiment of the present application, when the touch panel 1 is touched, the controller 13 can also adjust the capacitance trigger threshold value corresponding to each touch electrode 12 according to the pressure change value, thereby realizing the combination of pressure detection and capacitance detection. Furthermore, when the detected pressure change value is greater than or equal to the pressure trigger threshold value, and the capacitance change value detected by at least one touch electrode 12 is greater than or equal to the corresponding capacitance trigger threshold value, the controller 13 can output a trigger control signal to control the next action. By combining the trigger logic of the pressure detection device 11 and the touch electrode 12, the problem of single trigger logic and easy accidental touch is avoided, and the trigger experience of the touch panel is improved.

[0064] Figure 4 Another circuit structure diagram of the touch panel provided in the embodiment of the present application is shown in FIG. Figure 3 The difference is that the controller 13 can be composed of two functional circuits.

[0065] See also Figure 4 , the controller 13 includes a preprocessing circuit 131 and a control circuit 132, and the preprocessing circuit 131 is electrically connected to the pressure detection device 11 and the touch electrode 12. The preprocessing circuit 131 can be, for example, an analog front end (Analog Front End, AFE) chip, and the preprocessing circuit 131 is used to receive the first electrical signal and the second electrical signal, and adjust the pressure trigger threshold value corresponding to the pressure detection device 11 according to the distance between the touch position and the pressure detection device 11. And according to the pressure change value, adjust the capacitance trigger threshold value corresponding to the touch electrode 12. And, when the pressure change value is greater than or equal to the pressure trigger threshold value, and the capacitance change value is greater than or equal to the capacitance trigger threshold value, output a trigger signal.

[0066] The control circuit 132 is electrically connected to the pre-processing circuit 131 . The control circuit 132 may be, for example, a micro controller unit (MCU). The control circuit 132 may receive a trigger signal from the pre-processing circuit 131 and output a trigger control signal.

[0067] The embodiment of the present application does not limit the circuit architecture of the touch panel 1 .

[0068] In some embodiments, please refer to Figure 1The touch panel 1 includes a pressure detection device 11 disposed in the middle area A1, and two touch electrodes 12 disposed in the edge area A2, wherein the two touch electrodes 12 are respectively a first touch electrode 121 and a second touch electrode 122. Along a direction parallel to the substrate 10, that is, along the extension direction of the plane XY, the first touch electrode 121 and the second touch electrode 122 are located on opposite sides of the pressure detection device 11.

[0069] When the touch panel 1 is touched, the pressure change value contained in the first electrical signal generated by the pressure detection device 11 is F1, the capacitance change value contained in the second electrical signal generated by the first touch electrode 121 is C1, and the capacitance change value contained in the second electrical signal generated by the second touch electrode 122 is C2.

[0070] Assume that the pressure triggering original threshold value corresponding to the pressure detection device 11 is Ft0, the capacitance triggering original threshold value corresponding to the first touch electrode 121 is Ct01, and the capacitance triggering threshold value corresponding to the first touch electrode 121 is The capacitance triggering original threshold value corresponding to the second touch electrode 122 is Ct02, and the capacitance triggering threshold value corresponding to the second touch electrode 122 is Ct03.

[0071] It can be understood that the capacitance trigger threshold value Ct1 corresponding to the first touch electrode 121 is inversely proportional to the pressure change value F1, and the capacitance trigger threshold value Ct2 corresponding to the second touch electrode 122 is inversely proportional to the pressure change value F1. As the pressure change value F1 increases, the controller 13 can reduce the capacitance trigger threshold value Ct1 of the first touch electrode 121 and reduce the capacitance trigger threshold value Ct2 of the second touch electrode 122.

[0072] In this way, when the pressure change value F1 is large, the first touch electrode 121 or the second touch electrode 122 can be triggered when detecting a small capacitance change value, so that the touch panel 1 is suitable for application scenarios with small capacitance change values.

[0073] set up and The smaller one is The pressure trigger threshold corresponding to the pressure detection device 11 is

[0074]

[0075] It can be understood that, when the middle area A1 is touched, the distance between the touch position and the pressure detection device 11 is small, and the distance between the touch position and the first touch electrode 121 and the second touch electrode 122 is similar. Therefore, the difference between the capacitance change value C1 detected by the first touch electrode 121 and the capacitance change value C2 detected by the second touch electrode 122 is small. Close to 1 or equal to 1.

[0076] In the case of touching the edge area A2 where the first touch electrode 121 is located, or in the case of touching the edge area A2 where the first touch electrode 121 is located, the distance between the touch position and the pressure detection device 11 increases, the distance between the touch position and one of the first touch electrode 121 or the second touch electrode 122 increases, and the distance between the touch position and the other decreases. Therefore, the capacitance change value detected by one of the first touch electrode 121 or the second touch electrode 122 increases, and the capacitance change value detected by the other decreases, and the difference between the capacitance change value C1 and the capacitance change value C2 increases. Decrease and be less than 1.

[0077] That is, as the distance between the touch position and the pressure detection device 11 increases, the controller 13 can lower the pressure trigger threshold value Ft of the pressure detection device 11. In this way, when the distance between the touch position and the pressure detection device 11 is large, the pressure detection device 11 can detect a smaller pressure change value Ft and achieve triggering.

[0078] Then, the controller 13 makes a trigger judgment. When the pressure change value F1 detected by the pressure detection device 11 is greater than or equal to its pressure trigger threshold value Ft, and the capacitance change value C1 detected by the first touch electrode 121 is greater than or equal to its capacitance trigger threshold value Ct1, that is, when both the pressure detection device 11 and the first touch electrode 121 are triggered, the controller 13 outputs a trigger control signal to control the next action, thereby avoiding the problem of accidental touch of single pressure detection or capacitance detection.

[0079] Alternatively, when the pressure change value F1 detected by the pressure detection device 11 is greater than or equal to its pressure trigger threshold value Ft, and the capacitance change value C2 detected by the second touch electrode 122 is greater than or equal to its capacitance trigger threshold value Ct2, that is, when both the pressure detection device 11 and the second touch electrode 122 are triggered, the controller 13 may also output a trigger control signal to control the next action.

[0080] That is, on the basis of the triggering of the pressure detection device 11 , at least one of the first touch electrode 121 and the second touch electrode 122 must also be triggered, and then the controller 13 will output a trigger control signal.

[0081] Figure 5 Another structural diagram of a touch panel provided in an embodiment of the present application; Figure 6 for Figure 5 A cross-sectional view of the touch panel along the section line BB'. Figure 1 and Figure 2 The difference between the touch panel and the Figure 5 and Figure 6 The touch panel in the embodiment increases the number of touch electrodes, which is beneficial to improve the accuracy of touch position detection.

[0082] See also Figure 5 and Figure 6 The touch panel 1 includes a plurality of touch electrodes 12 , and the plurality of touch electrodes 12 are divided into a plurality of groups.

[0083] Exemplarily, the touch panel 1 includes 8 touch electrodes 12, which are numbered T1 to T8. According to the distance between each touch electrode 12 and the pressure detection device 11, T1 and T5 are divided into the first group of touch electrodes, T2, T4, T6 and T8 are divided into the second group of touch electrodes, and T3 and T7 are divided into the third group of touch electrodes.

[0084] For example, when each group includes a plurality of touch electrodes 12 , the distances between the plurality of touch electrodes 12 and the pressure detection device 11 are equal or substantially equal, and the distances between the touch electrodes 12 in different groups and the pressure detection device 11 are different.

[0085] As used herein, "approximately" includes the stated values ​​and averages that are within an acceptable range of deviation from the particular value, where the acceptable range of deviation is determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0086] It is understandable that when the touch panel 1 is touched with a finger, the touch position may only cover one touch electrode 12, for example, the touch position may cover any one touch electrode 12 of T1 to T8. When the touch panel 1 is touched with a palm, the touch position may cover multiple adjacent touch electrodes 12. The controller 13 may adjust the pressure trigger threshold value according to the distance between the touch position and the pressure detection device 11 and the number of touch electrodes 12 corresponding to the touch position, thereby improving the adjustment accuracy of the pressure trigger threshold value.

[0087] The corresponding relationship between each touch electrode 12 and a pressure trigger threshold value can be obtained through pre-testing, and different numbers of touch electrodes 12 correspond to different pressure trigger threshold values, which are written into the controller 13 .

[0088] Based on this, the controller 13 can obtain the corresponding pressure trigger threshold value according to the distance between the touch position and the pressure detection device 11 and the number of touch electrodes corresponding to the touch position.

[0089] By increasing the number of touch electrodes 12, the accuracy of touch position detection by the touch panel 1 can be improved. For example, the pressure detection device 11 is set in the middle area A1 of the touch panel 1, and multiple touch electrodes 12 are set in the edge area A2. The multiple touch electrodes 12 can be distributed around the pressure detection device 11. This is beneficial to improving the touch sensitivity of the edge area A2 of the touch panel 1.

[0090] Furthermore, by establishing a one-to-one correspondence between the touch electrodes 12 and the pressure trigger threshold value, the controller 13 detects the touch position and the number of touch electrodes 12 corresponding to the touch position, and can find the corresponding pressure trigger threshold value according to the above correspondence relationship. When the detection accuracy of the touch position is improved, it is conducive to more detailed adjustment of the pressure trigger threshold value.

[0091] In some embodiments, see Figure 5 and Figure 6 The shape of the touch panel 1 along the plane XY is a rectangle, and the elastic members 15 are arranged at the four corners of the touch panel 1 to improve the supporting effect of the elastic members 15 on the cover plate 14 .

[0092] Figure 7 Another structural diagram of a touch panel provided in an embodiment of the present application; Figure 8 for Figure 7 A cross-sectional view of the touch panel along the section line CC'. Figure 5 and Figure 6 The difference between the touch panel and the Figure 7 and Figure 8 The touch panel in the system increases the number of pressure detection devices.

[0093] See also Figure 7 and Figure 8 The touch panel 1 includes a plurality of pressure detection devices 11 and a plurality of touch electrodes 12. The touch panel 1 includes a plurality of first touch areas B1. Each pressure detection device 11 and at least one touch electrode 12 are arranged in the same first touch area B1.

[0094] Exemplarily, the touch panel 1 includes two first touch areas B1 , which are adjacently arranged along a direction Y, and each first touch area B1 is provided with a pressure detection device 11 .

[0095] Based on this, the controller 13 receives the first electrical signal from each pressure detection device 11 and the second electrical signal from each touch electrode 12. According to the first electrical signal of the pressure detection device 11 of the same first touch area B1 and the second electrical signal of the touch electrode 12, when the pressure change value contained in the first electrical signal is greater than or equal to the pressure trigger threshold value, and the capacitance change value contained in the second electrical signal is greater than or equal to the capacitance trigger threshold value, that is, the pressure detection device 11 and the touch electrode 12 of the same first touch area B1 are both triggered, the controller 13 outputs a trigger control signal to control the next action.

[0096] For example, touch Figure 7 In the first touch area B1 at the upper middle part, the controller 13 outputs a trigger control signal when it detects that both the pressure detection device 11 and the touch electrode 12 (at least one of T1, T2, T8) are triggered. Figure 7 In the first touch area B1 at the lower middle part, the controller 13 outputs a trigger control signal when detecting that both the pressure detection device 11 and the touch electrode 12 (at least one of T4 , T5 , and T6 ) are triggered.

[0097] By increasing the number of pressure detection devices 11, the detection coverage of the pressure detection devices 11 in the touch panel 1 is expanded, and the anti-mistouch capability of the touch panel 1 is improved. For example, the controller 13 will output a trigger control signal only when both the pressure detection device 11 and the touch electrode 12 in the first touch area B1 where the touch position is located are triggered.

[0098] In some embodiments, see Figure 7 and Figure 8 The touch panel 1 further includes at least one second touch area B2, the second touch area B2 is located between two adjacent first touch areas B1, and at least one touch electrode 12 is disposed in the second touch area B2.

[0099] Exemplarily, the touch panel 1 includes a second touch area B2 . Along the direction Y, the second touch area B2 is located between two adjacent first touch areas B1 .

[0100] When touching the second touch area B2, the controller 13 receives two first electrical signals from the pressure detection device 11 of the two adjacent first touch areas B1, and receives the second electrical signal from the touch electrode 12 of the second touch area B2. When the difference between the pressure change values ​​contained in the two first electrical signals is less than the reference threshold, and the capacitance change value contained in the second electrical signal is greater than or equal to the capacitance trigger threshold value, the controller 13 outputs a trigger control signal to control the next action.

[0101] It can be understood that when touching the second touch area B2, the distance between the touch position and the pressure detection device 11 of the two adjacent first touch areas B1 is almost the same. Therefore, the difference between the pressure change values ​​detected by the two pressure detection devices 11 is small. A "reference threshold" can be set. When the difference between the pressure change values ​​detected by the two pressure detection devices 11 is less than the reference threshold, it indicates that the second touch area B2 is touched.

[0102] The controller 13 determines through detection that the second touch area B2 is touched by a human hand. In this case, the controller 13 only needs to detect that the touch electrode 12 (at least one of T3 and T7) is triggered to output a trigger control signal.

[0103] By increasing the number of pressure detection devices 11, the detection coverage of the pressure detection devices 11 in the touch panel 1 is expanded. Even if an area outside the pressure detection device 11 is touched, the controller 13 can trigger the next action by comparing the pressure change values ​​detected by different pressure detection devices 11 and detecting whether the touch electrodes 12 in the area are triggered, thereby improving the anti-mistouch capability of the touch panel 1.

[0104] The embodiment of the present application also provides a control method of a touch panel. Fig. 9 and Fig.10 This is a control flow chart of the touch panel provided in an embodiment of the present application.

[0105] See also Fig. 9 When the touch panel 1 is touched, the pressure detection device 11 generates a first electrical signal including a pressure change value, and the multiple touch electrodes 12 generate multiple second electrical signals including capacitance change values. The multiple second electrical signals are used to determine the touch position of the touch panel 1.

[0106] The controller 13 receives the first electrical signal from the pressure detection device 11 to obtain the pressure change value. The controller 13 also receives multiple second electrical signals from multiple touch electrodes 12 and adjusts the pressure trigger threshold value corresponding to the pressure detection device 11 according to the distance between the touch position and the pressure detection device 11.

[0107] The controller 13 also performs a trigger judgment. When the pressure change value detected by the pressure detection device 11 is greater than or equal to its pressure trigger threshold value, that is, when the pressure detection device 11 is triggered, the controller 13 outputs a trigger control signal to control the next action. This control method realizes the combination of capacitance detection and pressure detection, avoids the problem of accidental touch of single pressure detection or capacitance detection, and improves the trigger experience of the touch panel 1.

[0108] See also Fig.10The controller 13 can also adjust the capacitance trigger threshold value corresponding to each touch electrode 12 according to the pressure change value. When the pressure change value detected by the pressure detection device 11 is greater than or equal to its pressure trigger threshold value, and the capacitance change value detected by at least one touch electrode 12 is greater than or equal to the corresponding capacitance trigger threshold value, that is, when the pressure detection device 11 and at least one touch electrode 12 are both triggered, the controller 13 outputs a trigger control signal to control the next action. This control method realizes the combination of the trigger logic of the pressure detection device 11 and the touch electrode 12, avoids the problem of single trigger logic and easy accidental touch, and improves the trigger experience of the touch panel.

[0109] The embodiments of the present application also provide a touch device, which may be an electronic device with a touch function, such as a mobile phone, a smart door lock, etc. The embodiments of the present application do not impose any special restrictions on the specific form of the touch device.

[0110] Take the touch device as a smart door lock as an example. Fig.11 This is a structural diagram of the smart door lock provided in an embodiment of the present application.

[0111] See also Fig.11 The smart door lock 2 includes a shell 21, a touch panel 1 arranged on the shell 21, and a trigger device arranged in the shell 21. The trigger device can be, for example, a structure for controlling unlocking, and the touch panel 1 is electrically connected to the trigger device.

[0112] When a person touches the touch panel 1 , if a trigger condition is met, the touch panel 1 will output a trigger control signal to the trigger device to control the trigger device to open the door lock.

[0113] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A touch panel, characterized in that: include: substrate; A pressure detection device, disposed on the substrate, wherein the pressure detection device is configured to generate a first electrical signal including a pressure change value when the touch panel is touched; a plurality of touch electrodes disposed on the substrate, wherein the plurality of touch electrodes are configured to generate a plurality of second electrical signals including capacitance change values ​​when the touch panel is touched, wherein the plurality of second electrical signals are used to determine a touch position of the touch panel; a controller, electrically connected to the pressure detection device and the plurality of touch electrodes; The controller is configured to receive the first electrical signal and the multiple second electrical signals, adjust the pressure trigger threshold value corresponding to the pressure detection device according to the distance between the touch position and the pressure detection device; and output a trigger control signal when the pressure change value is greater than or equal to the pressure trigger threshold value.

2. The touch panel according to claim 1, characterized in that: The controller is configured to reduce the pressure trigger threshold as the distance between the touch position and the pressure detection device increases.

3. The touch panel according to claim 1 or 2, characterized in that: The controller is further configured to adjust a capacitance trigger threshold value corresponding to each touch electrode according to the pressure change value; And, when the pressure change value is greater than or equal to the pressure trigger threshold value, and the capacitance change value included in the second electrical signal generated by at least one touch electrode is greater than or equal to the corresponding capacitance trigger threshold value, a trigger control signal is output.

4. The touch panel according to claim 3, characterized in that: The controller is configured to reduce a capacitance trigger threshold corresponding to each touch electrode as the pressure change value increases.

5. The touch panel according to claim 3 or 4, characterized in that: The touch panel includes a plurality of the pressure detection devices, the touch panel includes a plurality of first touch control areas, and each pressure detection device and at least one touch control electrode are arranged in the same first touch control area; The controller is configured to receive a first electrical signal from a pressure detection device in the same first touch area and a second electrical signal from a touch electrode, and output a trigger control signal when the pressure change value contained in the first electrical signal is greater than or equal to the pressure trigger threshold value and the capacitance change value contained in the second electrical signal is greater than or equal to the capacitance trigger threshold value.

6. The touch panel according to claim 5, characterized in that: The plurality of first touch control areas are arranged adjacent to each other, the touch panel further comprises at least one second touch control area, the second touch control area is located between two adjacent first touch control areas, and at least one touch control electrode is arranged in the second touch control area; The controller is configured to receive two first electrical signals from pressure detection devices of two adjacent first touch areas, and receive a second electrical signal from a touch electrode of the second touch area, and output a trigger control signal when the difference between the pressure change values ​​contained in the two first electrical signals is less than a reference threshold and the capacitance change value contained in the second electrical signal is greater than or equal to the capacitance trigger threshold value.

7. The touch panel according to any one of claims 1 to 6, characterized in that: The controller is configured to adjust the pressure trigger threshold value according to the distance between the touch position and the pressure detection device and the number of touch electrodes corresponding to the touch position.

8. The touch panel according to claim 7, characterized in that: Each touch electrode corresponds to a pressure trigger threshold value, and different numbers of touch electrodes correspond to different pressure trigger threshold values; The controller is configured to obtain a corresponding pressure trigger threshold value according to the distance between the touch position and the pressure detection device and the number of touch electrodes corresponding to the touch position.

9. The touch panel according to any one of claims 1 to 8, characterized in that: The plurality of touch electrodes are arranged around the pressure detection device.

10. The touch panel according to any one of claims 1 to 9, characterized in that: The controller includes a preprocessing circuit and a control circuit; The preprocessing circuit is electrically connected to the pressure detection device and the plurality of touch electrodes, and is configured to receive the first electrical signal and the plurality of second electrical signals, and adjust the pressure trigger threshold corresponding to the pressure detection device according to the distance between the touch position and the pressure detection device; and output a trigger signal when the pressure change value is greater than or equal to the pressure trigger threshold; The control circuit is electrically connected to the preprocessing circuit, and the control circuit is configured to receive the trigger signal and output the trigger control signal.

11. The touch panel according to any one of claims 1 to 10, characterized in that: The touch panel also includes a cover plate and an elastic member; The cover plate covers the pressure detection device and the plurality of touch electrodes, and the elastic member is disposed between the cover plate and the substrate.

12. A method for controlling a touch panel, characterized in that: include: When the touch panel is touched, the pressure detection device generates a first electrical signal including a pressure change value, and the plurality of touch electrodes generate a plurality of second electrical signals including a capacitance change value, wherein the plurality of second electrical signals are used to determine a touch position of the touch panel; The controller receives the first electrical signal and the multiple second electrical signals, adjusts the pressure trigger threshold value corresponding to the pressure detection device according to the distance between the touch position and the pressure detection device; and outputs a trigger control signal when the pressure change value is greater than or equal to the pressure trigger threshold value.

13. The control method according to claim 12, characterized in that: Also includes: The controller further adjusts the capacitance trigger threshold value corresponding to each touch electrode according to the pressure change value; And, when the pressure change value is greater than or equal to the pressure trigger threshold value, and the capacitance change value included in the second electrical signal generated by at least one touch electrode is greater than or equal to the corresponding capacitance trigger threshold value, a trigger control signal is output.

14. A touch device, characterized in that: include: The touch panel according to any one of claims 1 to 11; A trigger device is electrically connected to the touch panel, and the trigger device is configured to perform a trigger operation under the control of a trigger control signal from the touch panel.

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