Touch screen with contact touch control and suspension touch control functions and touch control device thereof

Abstract

The invention provides a touch screen with contact touch control and suspension touch control functions and a touch control device thereof, and relates to the field of display, and the touch control device comprises a scanning channel selector, a signal acquisition circuit and a touch point arithmetic circuit; the scanning channel selector enables the plurality of driving electrodes to be connected with a first excitation signal in sequence by taking a single driving electrode as a scanning unit in a contact touch scanning mode; in the suspension touch scanning mode, the multiple driving electrodes are connected to a second excitation signal in sequence by taking at least two driving electrodes as scanning units; the signal acquisition circuit receives a first induction signal generated based on the first excitation signal and a second induction signal generated based on the second excitation signal from the plurality of receiving electrodes respectively in a contact touch scanning mode and a suspension touch scanning mode; and the touch point operation circuit obtains the position information of the contact touch point based on the first induction signal and obtains the position information of the floating touch point based on the second induction signal, so that the problem of poor user experience is solved.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, specifically to a touch screen and its touch device that combine both contact touch and hover touch functions. Background Technology

[0002] Touchscreen technology is the most user-friendly input method after keyboards, mice, handwriting tablets, and voice input. Using this technology, users can operate the host computer simply by lightly touching icons or text on the touchscreen, making human-computer interaction more direct and greatly facilitating users. However, touchscreens in related technologies cannot simultaneously support both touch (normal touch) and hover touch functions, thus reducing the user experience. Summary of the Invention

[0003] The main purpose of this disclosure is to provide a touch screen and its touch device that have both contact touch and hover touch functions, which can simultaneously support contact touch (normal touch) and hover touch functions, thereby improving the problem of poor user experience.

[0004] To achieve the above objectives, a first aspect of this disclosure provides a touch device for a touchscreen that combines contact touch and hover touch functions. The touchscreen includes multiple driving electrodes and multiple receiving electrodes. The driving electrodes extend along a first direction and are arranged along a second direction, while the receiving electrodes extend along the second direction and are arranged along the first direction, with the first and second directions intersecting. The touch device includes a scanning channel selector, a signal acquisition circuit, and a touch point calculation circuit. The scanning channel selector is coupled to the multiple driving electrodes and is configured to, in a contact touch scanning mode that implements contact touch function, scan the multiple driving electrodes in sequence, using a single driving electrode as the scanning unit. The first excitation signal is connected; in the floating touch scanning mode that realizes the floating touch function, multiple driving electrodes are sequentially connected to the second excitation signal with at least two driving electrodes as scanning units; the signal acquisition circuit is coupled to multiple receiving electrodes, and the signal acquisition circuit is configured to: receive a first sensing signal generated based on the first excitation signal from multiple receiving electrodes in the contact touch scanning mode; and receive a second sensing signal generated based on the second excitation signal from multiple receiving electrodes in the floating touch scanning mode; the touch point calculation circuit is configured to: obtain the contact touch point position information based on the first sensing signal, and obtain the floating touch point position information based on the second sensing signal.

[0005] In some embodiments of this disclosure, the touch device further includes: a first judgment circuit coupled to a signal acquisition circuit, the first judgment circuit being configured to: after sequentially connecting multiple driving electrodes to a first excitation signal, determine whether the touch result of the current touch scan mode is a valid touch or an invalid touch based on a first sensing signal; wherein, the touch point calculation circuit is configured to: when the judgment result of the first judgment circuit is a valid touch, obtain the touch point position information based on the first sensing signal.

[0006] In some embodiments of this disclosure, the scanning channel selector is further configured to switch to the floating touch scanning mode when the determination result of the first determination circuit is invalid touch.

[0007] In some embodiments of this disclosure, the touch device further includes: a signal enhancement circuit coupled to the signal acquisition circuit, the signal enhancement circuit being configured to: enhance the second sensing signal to obtain a sensing enhancement signal; wherein, the touch point calculation circuit obtains the floating touch point position information based on the sensing enhancement signal.

[0008] In some embodiments of this disclosure, the touch device further includes: a second judgment circuit coupled to the signal acquisition circuit, the second judgment circuit being configured to: after sequentially connecting multiple driving electrodes to the second excitation signal, determine whether the touch result of the current hover touch scanning mode is a valid touch or an invalid touch based on the second sensing signal; wherein, the signal enhancement circuit is configured to: when the judgment result of the second judgment circuit is a valid touch, enhance the second sensing signal to obtain a sensing enhancement signal.

[0009] In some embodiments of this disclosure, the scanning channel selector is further configured to switch to the touch scanning mode when the second judgment circuit determines that the touch is invalid.

[0010] In some embodiments of this disclosure, the energy value of the second excitation signal is greater than the energy value of the first excitation signal.

[0011] In some embodiments of this disclosure, the touch device further includes an integrating circuit coupled to a scanning channel selector, the integrating circuit being configured to: integrate a first predetermined number of times based on a contact touch scanning command received thereto implement a contact touch function to obtain a first excitation signal, and integrate a second predetermined number of times based on a hover touch scanning command received thereto implement a hover touch function to obtain a second excitation signal, wherein the second predetermined number of times is greater than the first predetermined number of times.

[0012] In some embodiments of this disclosure, the touch device further includes: a controller coupled to a touch point calculation circuit, the controller controlling the touch point calculation circuit to obtain contact touch point position information based on a first sensing signal and to obtain hover touch point position information based on a second sensing signal; wherein the controller is also coupled to an integration circuit to alternately send contact touch scanning commands and hover touch scanning commands to the integration circuit.

[0013] The second aspect of this disclosure provides a touch screen with both contact touch and hover touch functions, comprising: multiple driving electrodes and multiple receiving electrodes, the driving electrodes extending along a first direction and arranged along a second direction, the receiving electrodes extending along the second direction and arranged along the first direction, the first direction and the second direction being intersected; and a touch device of any of the touch screens of the first aspect of this disclosure with both contact touch and hover touch functions.

[0014] A third aspect of this disclosure provides an electronic device that includes a touchscreen according to a second aspect of this disclosure.

[0015] The touchscreen and touch device thereof, which combine contact touch and hover touch functions, provided in this embodiment, utilizes a scanning channel selector. In the contact touch scanning mode, which enables contact touch, multiple driving electrodes are sequentially connected to a first excitation signal, using a single driving electrode as the scanning unit. In the hover touch scanning mode, which enables hover touch, the selector considers the weak sensing signal generated by a single driving electrode when the user hovers over the touchscreen. It uses at least two driving electrodes as the scanning unit, sequentially connecting multiple driving electrodes to a second excitation signal. This achieves spatial integration to increase energy and ensures sufficient sensing signal for the second sensing signal. While enabling hover touch, it allows for rapid switching between contact and hover scanning functions, simultaneously supporting both contact and hover touch functions, thus improving the poor user experience. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this disclosure, the accompanying drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of a touch screen structure provided in an embodiment of this disclosure; Figure 2 A schematic diagram of the structure of a touch device for a touch screen provided in an embodiment of this disclosure; Figure 3A and Figure 3B These are schematic diagrams illustrating finger-based touch operations and hover touch operations, respectively, according to embodiments of this disclosure. Figure 4A and Figure 4B These are schematic block diagrams of circuits that perform touch control functions according to different embodiments of this disclosure; Figure 5A and Figure 5B These are schematic block diagrams of circuits for performing hover touch functions provided in different embodiments of this disclosure; Figure 6 This is a schematic diagram illustrating the switching process between contact touch scanning mode and hover touch scanning mode provided in the embodiments of this disclosure.

[0018] It should be noted that the elements in the attached diagram are schematic and not drawn to scale. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present disclosure, the technical solutions of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present disclosure, and not all embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present disclosure.

[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0021] In this disclosure, the terms "upper," "middle," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily used to better describe this disclosure and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a particular orientation, or to be constructed and operated in a particular orientation.

[0022] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this subject matter pertains. It will be further understood that terms such as those defined in commonly used dictionaries shall be interpreted as having the meaning consistent with their meaning in the context of the specification and in the relevant art, and shall not be interpreted in an idealized or overly formal form unless otherwise explicitly defined herein. As used herein, the statement of “connecting” or “coupling” two or more parts together shall mean that these parts are directly joined together or joined through one or more intermediate components.

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other. This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] Hover touch typically requires a relatively large sensing capability. In related technologies, increasing the sensing capability is usually achieved by increasing time, that is, increasing the integral time of capacitive touch to increase the sensing capability. However, capacitive touch usually requires a certain speed to achieve a good experience, resulting in a poor user experience for hover touch modes in related technologies.

[0025] Example 1 To address the aforementioned issues, this disclosure provides a touch device with both touch and hover touch functions, aiming to simultaneously support both touch (normal touch) and hover touch functions, thereby improving the poor user experience. Figure 1 A schematic block diagram of a touchscreen 1 according to an embodiment of the present disclosure is shown. Figure 1 As shown, the touch screen 1 includes: multiple driving electrodes 10 and multiple receiving electrodes 20. The driving electrodes 10 extend along a first direction and are arranged along a second direction, and the receiving electrodes 20 extend along the second direction and are arranged along the first direction. The first direction and the second direction are intersected.

[0026] Figure 1 This is a schematic diagram of the structure of a touch screen 1 provided in an embodiment of the present disclosure, as shown below. Figure 1 As shown, the touchscreen 1 includes multiple driving electrodes 10 and multiple receiving electrodes 20. The driving electrodes 10 extend along a first direction and are arranged along a second direction, while the receiving electrodes 20 extend along the second direction and are arranged along the first direction. The first and second directions are intersected, and the overlapping area of ​​the driving electrodes 10 and the receiving electrodes 20 can form a mutual capacitance Cm.

[0027] For example, such as Figure 1As shown, the first direction is the X direction, and the second direction is the Y direction. Therefore, the driving electrode 10 can be understood as a horizontal electrode, and the receiving electrode 20 can be understood as a vertical electrode. The touchscreen 1 includes five driving electrodes 10, namely a first driving electrode 11, a second driving electrode 12, a third driving electrode 13, a fourth driving electrode 14, and a fifth driving electrode 15. The first driving electrode 11, the second driving electrode 12, the third driving electrode 13, the fourth driving electrode 14, and the fifth driving electrode 15 all extend along the X direction, and are arranged along the Y direction.

[0028] The touchscreen 1 also includes four receiving electrodes 20, namely a first receiving electrode 21, a second receiving electrode 22, a third receiving electrode 23, and a fourth receiving electrode 24. Among them, the first receiving electrode 21, the second receiving electrode 22, the third receiving electrode 23, and the fourth receiving electrode 24 all extend along the Y direction, and are arranged along the X direction.

[0029] A mutual capacitance Cm can be formed between the first driving electrode 11 and the first receiving electrode 21. 11 A mutual capacitance Cm can be formed between the first driving electrode 11 and the second receiving electrode 22. 12 A mutual capacitance Cm can be formed between the first driving electrode 11 and the third receiving electrode 23. 13 A mutual capacitance Cm can be formed between the first driving electrode 11 and the fourth receiving electrode 24. 14 A mutual capacitance Cm can be formed between the second driving electrode 12 and the first receiving electrode 21. 21 A mutual capacitance Cm can be formed between the second driving electrode 12 and the second receiving electrode 22. 22 A mutual capacitance Cm can be formed between the second driving electrode 12 and the third receiving electrode 23. 23 A mutual capacitance Cm can be formed between the second driving electrode 12 and the fourth receiving electrode 24. 24 A mutual capacitance Cm can be formed between the third driving electrode 13 and the first receiving electrode 21. 31 A mutual capacitance Cm can be formed between the third driving electrode 13 and the second receiving electrode 22. 32 A mutual capacitance Cm can be formed between the third driving electrode 13 and the third receiving electrode 23. 33 A mutual capacitance Cm can be formed between the third driving electrode 13 and the fourth receiving electrode 24. 34 A mutual capacitance Cm can be formed between the fourth driving electrode 14 and the first receiving electrode 21. 41 A mutual capacitance Cm can be formed between the fourth driving electrode 14 and the second receiving electrode 22.42 A mutual capacitance Cm can be formed between the fourth driving electrode 14 and the third receiving electrode 23. 43 A mutual capacitance Cm can be formed between the fourth driving electrode 14 and the fourth receiving electrode 24. 44 A mutual capacitance Cm can be formed between the fifth driving electrode 15 and the first receiving electrode 21. 51 A mutual capacitance Cm can be formed between the fifth driving electrode 15 and the second receiving electrode 22. 52 A mutual capacitance Cm can be formed between the fifth driving electrode 15 and the third receiving electrode 23. 53 A mutual capacitance Cm can be formed between the fifth driving electrode 15 and the fourth receiving electrode 24. 54 .

[0030] In other embodiments, the touchscreen 1 may include two, three, four, or five or more driving electrodes 10 and two, three, or four or more receiving electrodes 20, and the number of mutual capacitances that can be formed between the driving electrodes 10 and the receiving electrodes 20 is the product of the number of receiving electrodes 20 and the number of driving electrodes 10. In practical applications, there is no specific limitation on the specific number of driving electrodes 10 and receiving electrodes 20 in the touchscreen 1.

[0031] It should be noted that, Figure 1 This example only illustrates the first direction as the X direction and the second direction as the Y direction. In other embodiments, the first direction can be the Y direction and the second direction as the X direction. Accordingly, the driving electrode 10 can be understood as a longitudinal electrode and the receiving electrode 20 can be understood as a transverse electrode.

[0032] refer to Figure 2 The touch device shown includes a scanning channel selector, a signal acquisition circuit, and a touch point calculation circuit. The scanning channel selector is coupled to multiple driving electrodes 10. The scanning channel selector has two scanning modes. One scanning mode is a traditional contact touch scanning mode, which is used to realize contact touch function. The other scanning mode is a hover touch scanning mode, which is used to realize hover touch function.

[0033] For details, please refer to Figure 3A and Figure 4AThe scanning channel selector is configured such that, in the touch scan mode that enables touch control, multiple driving electrodes 10 are sequentially connected to the first excitation signal, with a single driving electrode 10 as the scanning unit. Specifically, when executing the touch scan mode, the scanning channel selector connects to one driving electrode 10 at a time, thus inputting the first excitation signal Tx1 to that connected driving electrode 10, thereby sequentially connecting multiple driving electrodes 10 to the first excitation signal Tx1. For example, when the total number of driving electrodes 10 is N, connecting one driving electrode 10 to the first excitation signal Tx1 at a time requires N scans to complete the sequential scanning of the N driving electrodes 10. In the touch scanning mode where the finger 303 is directly pressed on the touch cover 301, a driving electrode 10 is used as the excitation end (Tx) of the scanning unit to detect the position of the touch point. Since the finger 303 is close to the receiving electrode 20 (Rx) when it is directly pressed on the touch cover 301, only the area covered or close to the area of ​​the finger 303 is considered.

[0034] refer to Figure 3B and Figure 5A In the floating touch scanning mode that enables floating touch functionality, the scanning channel selector uses at least two driving electrodes 10 as scanning units to sequentially connect multiple driving electrodes 10 to the second excitation signal Tx2. That is, when executing the floating touch scanning mode, the scanning channel selector connects at least two adjacent driving electrodes 10 each time, thereby inputting the second excitation signal Tx2 to the connected at least two driving electrodes 10, thus sequentially connecting multiple driving electrodes 10 to the second excitation signal Tx2. For example, when the total number of driving electrodes 10 is N, M (1 < M < N) driving electrodes 10 are connected to the second excitation signal Tx2 at a time, requiring N / M scans to complete the sequential scanning of N driving electrodes 10. In this embodiment, the scanning unit is equal to the scanning step unit. In other embodiments, the scanning step unit can be smaller than the scanning unit. For example, when the total number of driving electrodes 10 is N, when M (1 < M < N) driving electrodes 10 are connected to the second excitation signal Tx2 at one time, the scanning step unit is 1, so (N-M+1) scans are required to complete the sequential scanning of N driving electrodes 10.

[0035] As can be seen from the above, reference Figure 3B and Figure 5AThe hovering touch scanning method is a scanning method using several driving electrodes 10 (also called excitation terminals Tx). The corresponding detection method is the detection method when the finger 303 moves away from the touch cover 301. Since the capacitive sensing is a radiation method when the finger 303 hovers above the touch cover 301, the capacitive sensing effect of a single point will radiate to multiple driving electrodes 10. Therefore, the hovering scanning can scan multiple driving electrodes 10 at once, thus achieving the effect of increasing the integrated energy in the space.

[0036] refer to Figure 2 The signal acquisition circuit is coupled to multiple receiving electrodes 20. The signal acquisition circuit is configured to: in touch-sensitive scanning mode, receive a first sensing signal Rx1 generated based on a first excitation signal Tx1 from the multiple receiving electrodes 20. Each time a driving electrode 10 is connected to the first excitation signal Tx1, the signal acquisition circuit receives the first sensing signal Rx1 generated based on the first excitation signal Tx1 from all the receiving electrodes 20. In hover-sensitive scanning mode, the signal acquisition circuit receives a second sensing signal Rx2 generated based on a second excitation signal Tx2 from the multiple receiving electrodes 20. Each time at least two driving electrodes 10 are connected to the second excitation signal Tx2, the signal acquisition circuit receives the second sensing signal Rx2 generated based on the second excitation signal Tx2 from all the receiving electrodes 20.

[0037] refer to Figure 4A The touch point calculation circuit is configured to obtain the touch point position information based on the first sensing signal Rx1. After completing one touch scan mode, the first sensing signal Rx1 will be received more than 20 times from multiple receiving electrodes. Thus, the touch point calculation circuit can calculate the position coordinate information of the touch point in the X and Y directions based on the energy difference of these first sensing signals Rx1, thereby obtaining the touch point position information.

[0038] refer to Figure 5A The touch point calculation circuit is also used to obtain the floating touch point position information based on the second sensing signal Rx2. After completing a floating touch scan mode, the second sensing signal Rx2 will be received more than 20 times from multiple receiving electrodes. Thus, the touch point calculation circuit can calculate the position coordinate information of the floating touch point in the X and Y directions based on the energy difference of these second sensing signals Rx2, thereby obtaining the floating touch point position information.

[0039] In the above scheme, by setting a scanning channel selector, in the contact touch scanning mode that realizes the contact touch function, the scanning channel selector uses a single driving electrode 10 as the scanning unit, so that multiple driving electrodes 10 are sequentially connected to the first excitation signal Tx1. In the hover touch scanning mode that realizes the hover touch function, considering the weak sensing amount of the sensing signal generated by a single driving electrode 10 when the user hovers and touches the cover plate 301, the scanning channel selector uses at least two driving electrodes 10 as the scanning unit, so that multiple driving electrodes 10 are sequentially connected to the second excitation signal Tx2. This can achieve the integration effect in space to increase the energy, so that the second sensing signal Rx2 reaches a sufficient sensing amount. While realizing the hover touch function, it can quickly switch between the contact scanning function and the hover scanning function, and can support both contact touch and hover touch functions at the same time, thereby improving the problem of poor user experience.

[0040] The principle is as follows: (Reference) Figure 3A and Figure 3B The touchscreen includes a touch cover 301 and a sensing film 302, with the sensing film 302 located below the touch cover. (Reference) Figure 3A When the finger 303 makes a touch operation, since the distance between the finger 303 and the lower channel is much smaller than that of other channels, only a single driving electrode 10Tx is needed as a scanning unit for scanning, and a first sensing signal Rx1 with relatively large energy can be obtained. (Reference) Figure 3B When a finger 303 performs a hover touch operation, since the distance between the finger 303 and the lower channel is relatively large, and the distance of the adjacent channels is approximately the same as the distance below the finger 303, all of them will receive a proximity sensing contribution from the area of ​​the finger 303. Therefore, at least two driving electrodes 10Tx are needed as scanning units to scan, which can accumulate the energy of multiple channels to obtain a second sensing signal Rx2 with a larger integrated energy, thereby sensing the smaller energy value generated by each mutual capacitance. That is, this disclosure proposes a hover touch scanning method that combines time and space, achieving sufficient sensing quantity within a limited time, and can switch between contact touch (normal touch) and hover touch functions to achieve the same effect as the original function.

[0041] The following combination Figures 4A to 6 A detailed description of the touch device is provided, including... Figure 4A and Figure 4B The following are schematic block diagrams of circuits for performing touch control functions, provided in different embodiments. Figure 5A and Figure 5B The following are schematic block diagrams of circuits for implementing the hover touch function, provided in different embodiments. Figure 6 This is a schematic diagram illustrating the switching process between touch scan mode and hover touch scan mode.

[0042] For example, refer to Figure 4B and Figure 6 The touch device may further include: a first judgment circuit coupled to a signal acquisition circuit, the first judgment circuit being configured to: after sequentially connecting multiple driving electrodes 10 to a first excitation signal Tx1, determine whether the touch result of the current touch scan mode is a valid touch or an invalid touch based on a first sensing signal Rx1; wherein, the touch point calculation circuit is configured to: when the judgment result of the first judgment circuit is a valid touch, obtain the touch point position information based on the first sensing signal Rx1. When the judgment result of the first judgment circuit is an invalid touch, it indicates that the user has not performed a valid touch operation on the touchscreen in this touch scan mode, thus eliminating the need to calculate the touch point position information based on the first sensing signal Rx1. This simplifies the calculation and avoids calculating the first sensing signal Rx1 caused by environmental interference or other factors, thereby preventing incorrect touch point position information and potential misoperation by the host.

[0043] Regarding the configuration of the first judgment circuit, it can be any logic circuit capable of calculating based on the first sensing signal Rx1 to determine whether the touch result in the current touch scanning mode is a valid touch or an invalid touch. For example, the degree of change in the first sensing signal Rx1, the difference in the magnitude of the sensing amount, etc., can be used to determine whether the touch result in the current touch scanning mode is a valid touch or an invalid touch.

[0044] For example, refer to Figure 4B and Figure 6 The scanning channel selector can also be configured to switch to the hover touch scanning mode when the first judgment circuit determines that the touch is invalid. That is, after determining that the user has not performed a valid touch operation on the touchscreen in the current touch scan mode, it can switch to the hover touch scanning mode to trigger the hover touch function, thereby determining whether the user has performed a valid hover touch operation on the touchscreen. This supports automatic switching from the touch scan mode to the hover touch scan mode, improving the user experience.

[0045] For example, refer to Figure 5B and Figure 6The touch device may further include a signal enhancement circuit coupled to the signal acquisition circuit. The signal enhancement circuit is configured to enhance the second sensing signal Rx2 to obtain an enhanced sensing signal. The touch point calculation circuit then obtains the floating touch point position information based on the enhanced sensing signal. Signal enhancement is a high-frequency signal amplification scheme. While the floating touch scanning mode is helpful for detecting small signals, environmental factors causing overall touch plane signal enhancement can lead to detection errors. Therefore, this embodiment uses high-frequency enhancement to extract local low-frequency signals. By setting the signal enhancement circuit to enhance the second sensing signal Rx2 to obtain the corresponding enhanced sensing signal, the sensing signal intensity is increased. This reduces the influence of interference signals when the touch point calculation circuit calculates the floating touch point position information based on the enhanced sensing signal, thereby improving the accuracy of the calculated floating touch point position information.

[0046] For example, refer to Figure 5B and Figure 6 The touch device may further include a second judgment circuit coupled to the signal acquisition circuit. The second judgment circuit is configured to: after sequentially connecting multiple driving electrodes 10 to the second excitation signal Tx2, determine whether the touch result of this hover touch scanning mode is a valid touch or an invalid touch based on the second sensing signal Rx2. The signal enhancement circuit is configured to: when the judgment result of the second judgment circuit is a valid touch, enhance the second sensing signal Rx2 to obtain a sensing enhancement signal. When the judgment result of the second judgment circuit is an invalid touch, it indicates that the user has not performed a valid hover touch operation on the touchscreen in this hover touch scanning mode. Therefore, it is unnecessary to calculate the corresponding sensing enhancement signal based on the second sensing signal Rx2, or to perform subsequent calculations to obtain the hover touch point position information based on the second sensing signal Rx2. This simplifies the computation and avoids calculating the second sensing signal Rx2 caused by environmental interference or other factors, thus preventing incorrect hover touch point position information and potential misoperation by the host.

[0047] For example, refer to Figure 5B and Figure 6 The scanning channel selector can also be configured to switch to touch scan mode when the second judgment circuit determines that the touch is invalid. That is, after determining that the user has not performed a valid hover touch operation on the touchscreen in the current touch scan mode, it can switch to touch scan mode to trigger the touch function, thereby determining whether the user has performed a valid touch operation on the touchscreen, thus supporting automatic switching from hover touch scan mode to touch scan mode. Combined with the first judgment circuit mentioned above, this achieves automatic alternation between hover touch scan mode and touch scan mode, improving the user experience.

[0048] For example, the energy value of the second excitation signal Tx2 is greater than the energy value of the first excitation signal Tx1. By making the energy value of the second excitation signal Tx2 greater than the energy value of the first excitation signal Tx1, the sensing quantity of the second sensing signal Rx2 generated based on the second excitation signal Tx2 can be increased. This mitigates the impact of the weak sensing quantity generated by hover touch on the accuracy of the calculation of the hover touch point position information, thereby improving the accuracy of the calculated hover touch point position information. Furthermore, by using different energy values ​​for the first excitation signal Tx1 and the second excitation signal Tx2, both the hover touch scanning mode and the contact touch scanning mode use the most matched excitation signals.

[0049] There are several ways to make the energy value of the second excitation signal Tx2 greater than the energy value of the first excitation signal Tx1. Some of these methods are illustrated below.

[0050] For example, refer to Figure 4B as well as Figure 5B The touch device may further include an integrating circuit coupled to a scanning channel selector. The integrating circuit is configured to integrate a first predetermined number of times based on a received touch scan command Int_f1 for implementing touch functionality to obtain a first excitation signal Tx1, and to integrate a second predetermined number of times based on a received hover scan command Int_f1 for implementing hover touch functionality to obtain a second excitation signal Tx2, wherein the second predetermined number of times is greater than the first predetermined number of times. In this method, by appropriately increasing the number of integrations (as the second predetermined number of times) when the integrating circuit generates the second excitation signal Tx2, the energy magnitude of the second excitation signal Tx2, which serves as the scanning signal, is harmonized, thereby ensuring that the energy value of the second excitation signal Tx2 is greater than the energy value of the first excitation signal Tx1. Since the energy value of the first excitation signal Tx1 has not increased compared to related technologies, and the number of integrations (as the first predetermined number of times) when the integrating circuit generates the first excitation signal Tx1 has not increased compared to related technologies, the scanning time required for a single touch scan mode has not increased, thus avoiding excessive time consumption.

[0051] There are several ways to configure the integrator circuit, for example, refer to... Figure 4B as well as Figure 5B The integral circuit may include an integral control circuit and an integral drive circuit. The integral control circuit is used to receive the touch scan command Int_f1 and the hover touch scan command Int_f1, and control the integral drive circuit to generate a first excitation signal Tx1 and a second excitation signal Tx2 based on the received corresponding commands.

[0052] For example, refer to Figure 4B as well as Figure 5BThe touch device may further include: a controller coupled to a touch point calculation circuit, the controller controlling the touch point calculation circuit to obtain the position information of the contact touch point based on a first sensing signal Rx1, and to obtain the position information of the floating touch point based on a second sensing signal Rx2. That is, as the controller of the touch point calculation circuit, it can determine whether and when to trigger the logic operation function of the touch point calculation circuit. (Refer to...) Figure 4B , Figure 5B as well as Figure 6 The controller is also coupled to the integrating circuit to alternately send contact touch scan commands Int_f1 and hover touch scan commands Int_f1 to the integrating circuit. That is, the controller also acts as the control module for the integrating circuit, alternately sending contact touch scan commands Int_f1 and hover touch scan commands Int_f1 to the integrating circuit, thereby achieving alternating cyclic execution of contact touch scan mode and hover touch scan mode. This allows for rapid recognition of valid contact or hover touch operations input by the user to the touchscreen, reducing recognition latency and improving the user experience.

[0053] It should be understood that the touch screen with both contact touch and hover touch functions disclosed herein may include other components in addition to the components shown above, and these components are all within the protection scope of the touch screen with both contact touch and hover touch functions disclosed herein.

[0054] Example 2 This disclosure provides a touch screen with both contact touch and hover touch functions, comprising: multiple driving electrodes and multiple receiving electrodes, the driving electrodes extending along a first direction and arranged along a second direction, the receiving electrodes extending along the second direction and arranged along the first direction, the first direction and the second direction being intersected; and a touch device for any of the touch screens with both contact touch and hover touch functions shown in this disclosure.

[0055] Example 3 This disclosure provides an electronic device including a touchscreen as shown in Embodiment 2. The electronic device can be, but is not limited to, home appliances, communication terminal equipment, industrial control equipment, motor drive equipment, and vehicle-mounted electronic equipment.

[0056] As can be seen from the above description, this disclosure achieves the following technical effects: it proposes a hybrid time and space hover touch scanning method, which achieves sufficient sensing quantity with a limited time, and can switch between contact touch (normal touch) and hover touch functions to achieve the same effect as the original function.

[0057] Unless otherwise expressly indicated by the context, the singular form of words used herein and in the appended claims includes the plural form, and vice versa. Thus, when referring to the singular, the plural form of the corresponding term is generally included. Similarly, the terms “comprising” and “including” shall be interpreted as including rather than exclusively. Likewise, the terms “including” and “or” shall be interpreted as including unless such interpretation is expressly prohibited herein. Where the term “example” is used herein, particularly when it follows a set of terms, “example” is merely exemplary and illustrative and should not be considered exclusive or extensive.

[0058] Further aspects and scope of adaptation become apparent from the description provided herein. It should be understood that various aspects of this disclosure may be implemented individually or in combination with one or more other aspects. It should also be understood that the descriptions and specific embodiments herein are for illustrative purposes only and are not intended to limit the scope of this disclosure.

[0059] Several embodiments of this disclosure have been described in detail above. However, it is obvious that those skilled in the art can make various modifications and variations to the embodiments of this disclosure without departing from the spirit and scope of this disclosure. The scope of protection of this disclosure is defined by the appended claims. Although embodiments of this disclosure have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this disclosure, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A touch device with both touch and hover touch functions, characterized in that, The touch screen includes multiple driving electrodes and multiple receiving electrodes. The driving electrodes extend along a first direction and are arranged along a second direction. The receiving electrodes extend along the second direction and are arranged along the first direction. The first direction and the second direction are intersected. The touch device includes: A scan channel selector coupled to the plurality of driving electrodes is configured to: in a contact touch scanning mode that implements the contact touch function, sequentially connect the plurality of driving electrodes to a first excitation signal with a single driving electrode as the scanning unit; and in a hover touch scanning mode that implements the hover touch function, sequentially connect the plurality of driving electrodes to a second excitation signal with at least two driving electrodes as the scanning unit. A signal acquisition circuit coupled to the plurality of receiving electrodes is configured to: receive a first sensing signal generated based on the first excitation signal from the plurality of receiving electrodes in the contact touch scanning mode; and receive a second sensing signal generated based on the second excitation signal from the plurality of receiving electrodes in the hover touch scanning mode. The touch point calculation circuit is configured to: obtain contact touch point position information based on the first sensing signal, and obtain floating touch point position information based on the second sensing signal.

2. The touch device as described in claim 1, characterized in that, The touch device also includes: A first judgment circuit coupled to the signal acquisition circuit is configured to: after sequentially connecting the multiple driving electrodes to the first excitation signal, determine whether the touch result of the current touch scan mode is a valid touch or an invalid touch based on the first sensing signal; The touch point calculation circuit is configured to: when the judgment result of the first judgment circuit is a valid touch, obtain the touch point position information based on the first sensing signal.

3. The touch device as described in claim 2, characterized in that, The scanning channel selector is also configured to switch to the floating touch scanning mode when the judgment result of the first judgment circuit is invalid touch.

4. The touch device as described in claim 1, characterized in that, The touch device also includes: A signal enhancement circuit coupled to the signal acquisition circuit is configured to enhance the second induced signal to obtain an enhanced induced signal. The touch point calculation circuit obtains the position information of the floating touch point based on the sensing enhancement signal.

5. The touch device as described in claim 4, characterized in that, The touch device also includes: A second judgment circuit coupled to the signal acquisition circuit is configured to: after the multiple driving electrodes are sequentially connected to the second excitation signal, determine whether the touch result of this hover touch scanning mode is a valid touch or an invalid touch based on the second sensing signal; The signal enhancement circuit is configured to enhance the second sensing signal to obtain the enhanced sensing signal when the second judgment circuit determines that the touch is valid.

6. The touch device as described in claim 5, characterized in that, The scanning channel selector is further configured to switch to the touch scanning mode when the second judgment circuit determines that the touch is invalid.

7. The touch device as claimed in claim 1, characterized in that, The energy value of the second excitation signal is greater than the energy value of the first excitation signal.

8. The touch device as claimed in claim 7, characterized in that, The touch device also includes: An integrating circuit coupled to the scanning channel selector is configured to: integrate a first predetermined number of times based on a received touch scan command for implementing a touch function to obtain the first excitation signal; and integrate a second predetermined number of times based on a received hover scan command for implementing a hover function to obtain the second excitation signal, wherein the second predetermined number of times is greater than the first predetermined number of times.

9. The touch device as claimed in claim 8, characterized in that, The touch device also includes: A controller coupled to the touch point calculation circuit controls the touch point calculation circuit to obtain the contact touch point position information based on the first sensing signal, and to obtain the floating touch point position information based on the second sensing signal; The controller is also coupled to the integrating circuit to alternately send the contact touch scan command and the hover touch scan command to the integrating circuit.

10. A touchscreen that combines contact touch and hover touch functions, characterized in that, include: The system comprises multiple driving electrodes and multiple receiving electrodes, wherein the driving electrodes extend along a first direction and are arranged along a second direction, and the receiving electrodes extend along the second direction and are arranged along the first direction, wherein the first direction and the second direction intersect; and... The touch device of any one of claims 1-9, which combines touch control and hover touch control functions.

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