Folding angle detection method, touch chip, and touch device

Abstract

The present application discloses a folding angle detection method, a touch chip, and a touch device, which are applied to a folding touch screen. The folding touch screen comprises a plurality of electrodes; an electrode in a folding area of the folding touch screen is used for generating a self-capacitance detection signal and forms a self-capacitance detection area; electrodes in two end areas of the folding touch screen are used for generating mutual capacitance detection signals and form mutual capacitance detection areas. The detection method comprises: when the folding touch screen is unfolded or folded, obtaining mutual capacitance detection signals and a self-capacitance detection signal; obtaining a first angle value on the basis of the mutual capacitance detection signals, and obtaining a second angle value on the basis of the self-capacitance detection signal; and obtaining an opening angle value of the folding touch screen on the basis of the first angle value and the second angle value. The present application improves the opening angle sensing effect of the folding touch screen.

Description

Folding angle detection method, touch chip and touch device Technical Field

[0001] The present application relates to the field of touch screen technology, and in particular to a folding angle detection method, a touch chip, and a touch device. Background Art

[0002] With the continuous advancement of flexible touch screen technology, a large number of electronic products equipped with foldable touch screens have appeared on the market, such as mobile phones, tablets, e-books and other electronic terminals, which use foldable touch screens for human-computer interaction. When using foldable touch screens for human-computer interaction, certain application scenarios are based on the opening and closing angle of the foldable touch screen.

[0003] There are two existing methods for detecting the opening and closing angle of foldable touchscreens: mutual capacitance sensing and self-capacitance sensing. However, mutual capacitance sensing is less effective when the screen is opened and closed at large angles. Foldable touchscreens using self-capacitance sensing also experience significant degradation in sensing performance due to structural aging or assembly process deviations. Summary of the Invention

[0004] In view of this, the present application provides a folding angle detection method and a touch chip for improving the sensing effect of the opening and closing angle of a foldable touch screen. The technical solution of the present application is as follows:

[0005] In a first aspect, the present application provides a method for detecting a folding angle, which is applied to a foldable touch screen. The foldable touch screen includes a plurality of electrodes, wherein the electrodes in the folding area of ​​the foldable touch screen are used to generate a self-capacitance detection signal and constitute a self-capacitance detection area, and the electrodes in the two end areas of the foldable touch screen are used to generate a mutual capacitance detection signal and constitute a mutual capacitance detection area. The detection method includes: when the foldable touch screen is opened and closed, obtaining the mutual capacitance detection signal and the self-capacitance detection signal; obtaining a first angle value according to the mutual capacitance detection signal, and obtaining a second angle value according to the self-capacitance detection signal; and obtaining an opening and closing angle value of the foldable touch screen according to the first angle value and the second angle value.

[0006] In one embodiment of the present application, obtaining the opening and closing angle of the foldable touch screen according to the first angle value and the second angle value includes: judging whether the current opening and closing angle of the foldable touch screen is an acute angle or an obtuse angle according to the first angle value and / or the second angle value; when it is determined that the opening and closing angle is an acute angle, outputting the first angle value as the opening and closing angle value; when it is determined that the opening and closing angle is an obtuse angle, calibrating the second angle value using an angle calibration coefficient, and outputting the calibrated second angle value as the opening and closing angle value; wherein, the angle calibration coefficient is obtained by calibrating the second angle value based on the first angle value when the opening and closing angle is an acute angle.

[0007] In one embodiment of the present application, obtaining the opening and closing angle of the foldable touch screen based on the first angle value and the second angle value also includes: when determining that the first angle value is less than a preset angle value and / or determining that the strength value of the mutual capacitance detection signal is greater than a preset strength value, using the first angle value to calibrate the second angle value to update the angle calibration coefficient.

[0008] In one embodiment of the present application, obtaining the opening and closing angle of the foldable touch screen based on the first angle value and the second angle value includes: when determining that the first angle value is less than a preset angle value and / or determining that the strength value of the mutual capacitance detection signal is greater than a preset strength value, using the first angle value to calibrate the second angle value to obtain an angle calibration coefficient, and outputting the first angle value as the opening and closing angle value; when determining that the first angle value is greater than or equal to the preset angle value and / or determining that the strength value of the mutual capacitance detection signal is less than or equal to the preset strength value, using the angle calibration coefficient to calibrate the second angle value, and outputting the calibrated second angle value as the opening and closing angle value.

[0009] In one embodiment of the present application, the electrodes of the foldable touch screen are mutual capacitance driving electrodes and mutual capacitance sensing electrodes. The mutual capacitance driving electrodes or mutual capacitance sensing electrodes arranged parallel to the fold in the folding area of ​​the foldable touch screen are used to generate self-capacitance detection signals.

[0010] In an embodiment of the present application, acquiring the mutual capacitance detection signal and the self-capacitance detection signal includes: acquiring the mutual capacitance detection signal at a first moment; and acquiring the self-capacitance detection signal at a second moment.

[0011] In one embodiment of the present application, the electrodes of the foldable touch screen include self-capacitance sensing electrodes in the folding area, and also include mutual capacitance driving electrodes and mutual capacitance sensing electrodes arranged outside the folding area; the mutual capacitance driving electrodes and the mutual capacitance sensing electrodes are used to generate mutual capacitance detection signals, and the self-capacitance sensing electrodes are used to generate self-capacitance detection signals.

[0012] A second aspect of the present application provides a touch chip connected to electrodes in a foldable touch screen, wherein the touch chip is used to execute the detection method.

[0013] A third aspect of the present application provides a touch device, comprising a foldable touch screen and a touch chip as described in claim 8, wherein the foldable touch screen comprises a plurality of electrodes; the electrodes in the folding area of ​​the foldable touch screen are used to generate a self-capacitance detection signal and constitute a self-capacitance detection area, and the electrodes in the two end areas of the foldable touch screen are used to generate a mutual capacitance detection signal and constitute a mutual capacitance detection area; when the foldable touch screen is opened and closed, the mutual capacitance detection signal and the self-capacitance detection signal are obtained; a first angle value is obtained according to the mutual capacitance detection signal, and a second angle value is obtained according to the self-capacitance detection signal; and the opening and closing angle value of the foldable touch screen is obtained according to the first angle value and the second angle value.

[0014] In one embodiment of the present application, obtaining the opening and closing angle of the foldable touch screen according to the first angle value and the second angle value includes: judging whether the current opening and closing angle of the foldable touch screen is an acute angle or an obtuse angle according to the first angle value and / or the second angle value; when it is determined that the opening and closing angle is an acute angle, outputting the first angle value as the opening and closing angle value; when it is determined that the opening and closing angle is an obtuse angle, calibrating the second angle value using an angle calibration coefficient, and outputting the calibrated second angle value as the opening and closing angle value; wherein, the angle calibration coefficient is obtained by calibrating the second angle value based on the first angle value when the opening and closing angle is an acute angle.

[0015] The present application can perform self-capacitance detection through electrodes in the folding area of ​​the foldable touch screen, and perform mutual capacitance detection through electrodes in the two end areas of the foldable touch screen to obtain self-capacitance detection signals and mutual capacitance detection signals, and then obtain the folding angle of the foldable touch screen based on the self-capacitance detection signals and the mutual capacitance detection signals, which can ensure that large-angle detection of the foldable screen has better results and avoid the influence of screen aging or process deviation on the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic diagram of a foldable touch screen provided in an embodiment of the present application.

[0017] FIG2 is a flow chart of a method for detecting a folding angle provided in an embodiment of the present application.

[0018] FIG3 is a flow chart of a first method for obtaining an opening and closing angle value provided in an embodiment of the present application.

[0019] FIG4 is a flow chart of a second method for obtaining an opening and closing angle value provided in an embodiment of the present application.

[0020] FIG5 is a flow chart of a third method for obtaining an opening and closing angle value provided in an embodiment of the present application.

[0021] FIG6 is a schematic diagram of a process for obtaining a detection signal provided in an embodiment of the present application. DETAILED DESCRIPTION

[0022] It should be noted that, in the embodiments of the present application, "at least one" refers to one or more, and "more than one" refers to two or more than two. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The terms "first", "second", "third", "fourth", etc. (if any) in the specification, claims and drawings of this application are used to distinguish similar objects, rather than to describe a specific order or sequence.

[0023] It should also be noted that the method disclosed in the embodiments of the present application or the method shown in the flowchart includes one or more steps for implementing the method. Without departing from the scope of the claims, the execution order of multiple steps can be interchanged with each other, and some steps can also be deleted.

[0024] With the continuous advancement of flexible touch screen technology, a large number of electronic products equipped with foldable touch screens have appeared on the market, such as mobile phones, tablets, e-books and other electronic terminals, which use foldable touch screens for human-computer interaction. When using foldable touch screens for human-computer interaction, certain application scenarios are based on the opening and closing angle of the foldable touch screen.

[0025] There are two methods for detecting the opening and closing angle of a foldable touch screen in the related art: one is a mutual capacitance sensing method, and the other is a self-capacitance sensing method.

[0026] In a foldable touch screen using mutual capacitance sensing, multiple drive electrodes and sensing electrodes are included. When detecting the opening and closing angle, a carrier signal is sent through the drive electrode, and the signal strength of the received carrier signal is measured by the sensing electrode during the time period when the drive electrode transmits the signal. The capacitance change between the drive electrode and the sensing electrode is sensed based on the change in signal strength, and the change in the opening and closing angle of the foldable touch screen is deduced based on the capacitance change.

[0027] In a foldable touch screen with self-capacitance sensing, multiple electrodes are included. When detecting the opening and closing angle, the capacitance between the electrode and the ground is charged at a first moment, and the capacitance value between the electrode and the ground is detected at a second moment. When a change in the capacitance value is detected, the change in the opening and closing angle of the foldable touch screen can be deduced based on the capacitance change.

[0028] However, mutual capacitance sensing is less effective when the screen is opened or closed at wide angles. Foldable touch screens that use self-capacitance sensing also experience significant degradation in sensing performance due to screen aging or assembly process deviations.

[0029] The present application provides a folding angle detection method and a touch chip for improving the sensing effect of the opening and closing angle of a foldable touch screen.

[0030] Please refer to FIG1 , which is a schematic diagram of a foldable touch screen provided in an embodiment of the present application, wherein the foldable touch screen 100 includes a mutual capacitance detection area 110 and a self-capacitance detection area 120 .

[0031] In the embodiment of the present application, the electrodes in the folding area of ​​the foldable touch screen 100 are used to generate self-capacitance detection signals and constitute the self-capacitance detection area 120. The electrodes in the two end areas of the foldable touch screen 100 are used to generate mutual capacitance detection signals and constitute the mutual capacitance detection area 110.

[0032] In some embodiments, the foldable touch screen 100 may be composed of mutual capacitance drive electrodes and mutual capacitance sensing electrodes, with at least one mutual capacitance drive electrode and at least one mutual capacitance sensing electrode forming a mutual capacitance detection area 110. At least one mutual capacitance drive electrode or at least one mutual capacitance sensing electrode may be time-multiplexed as a self-capacitance sensing electrode, and electrodes arranged parallel to the fold of the foldable touch screen 100 may be selected and multiplexed as self-capacitance sensing electrodes. It will be understood that in this case, the self-capacitance sensing electrodes constitute the self-capacitance detection area 120.

[0033] Among them, the above-mentioned foldable touch screen 100 includes multiple mutual capacitance driving electrodes and multiple mutual capacitance sensing electrodes. The touch chip of the foldable touch screen 100 is connected to each mutual capacitance driving electrode and mutual capacitance sensing electrode. The touch chip controls the mutual capacitance driving electrodes or mutual capacitance sensing electrodes set parallel to the fold of the foldable touch screen 100 to be time-shared and multiplexed as self-capacitance sensing electrodes.

[0034] It can be understood that in some embodiments, the touch chip can also divide the screen into a mutual capacitance detection area 110 and a self-capacitance detection area 120. For example, the folding area of ​​the foldable touch screen 100 can be divided into the self-capacitance detection area 120, and the mutual capacitance driving electrodes or mutual capacitance sensing electrodes in the self-capacitance detection area 120 can be time-shared and multiplexed as self-capacitance sensing electrodes.

[0035] In the embodiment of the present application, mutual capacitance drive electrodes and mutual capacitance sensing electrodes generate mutual capacitance detection signals, while self-capacitance detection signals are generated between the self-capacitance sensing electrodes and ground. That is, when detecting the folding angle, the touch chip can obtain mutual capacitance detection signals from the mutual capacitance drive electrodes and mutual capacitance sensing electrodes in the mutual capacitance detection area 110, and obtain self-capacitance detection signals from the self-capacitance sensing electrodes in the self-capacitance detection area 120.

[0036] In some embodiments, the foldable touch screen 100 may also be composed of mutual capacitance drive electrodes, mutual capacitance sensing electrodes, and self-capacitance sensing electrodes. For example, the self-capacitance sensing electrodes may be disposed in the folding area of ​​the foldable touch screen 100 to form the aforementioned self-capacitance detection area 120. In this embodiment, however, the mutual capacitance drive electrodes and mutual capacitance sensing electrodes are disposed outside the folding area of ​​the foldable touch screen 100.

[0037] Next, a folding angle detection method provided by an embodiment of the present application is described in conjunction with FIG1 . Referring to FIG2 , the detection method includes the following steps:

[0038] Step S21: when the foldable touch screen is opened or closed, obtaining a mutual capacitance detection signal from the mutual capacitance detection area and a self-capacitance detection signal from the self-capacitance detection area.

[0039] In the embodiment of the present application, the mutual capacitance detection area and the self-capacitance detection area can be divided in advance.

[0040] In some embodiments, the touch chip can detect the capacitance between some mutual capacitance drive electrodes and mutual capacitance sensing electrodes in real time, and determine whether the foldable touch screen is currently open or closed when the capacitance value changes. The mutual capacitance drive electrodes and mutual capacitance sensing electrodes used for opening and closing detection can constitute an opening and closing detection area.

[0041] In the aforementioned application scenario where the foldable touch screen is composed of mutual capacitance drive electrodes, mutual capacitance sensing electrodes, and self-capacitance sensing electrodes, that is, in the application scenario where the mutual capacitance drive electrodes or mutual capacitance sensing electrodes are not time-repeatedly multiplexed as self-capacitance sensing electrodes, the touch chip can also detect the capacitance between some of the self-capacitance sensing electrodes and ground in real time, and determine whether the foldable touch screen is currently opened or closed when the capacitance value changes. The portion of the self-capacitance sensing electrodes used to detect opening and closing constitutes an opening and closing detection area, which can overlap, partially overlap, or not overlap with the aforementioned self-capacitance detection area, without limitation herein.

[0042] Step S22: Obtain a first angle value according to the mutual capacitance detection signal, and obtain a second angle value according to the self-capacitance detection signal.

[0043] In the embodiment of the present application, after receiving a mutual capacitance detection signal, the touch chip can obtain a corresponding capacitance value based on the mutual capacitance detection signal, and then convert the capacitance value into a corresponding first angle value. Furthermore, after receiving a self-capacitance detection signal, the touch chip can obtain a corresponding capacitance value based on the self-capacitance detection signal, and then convert the capacitance value into a corresponding second angle value.

[0044] In some embodiments, the touch chip may be equipped with an algorithm for calculating the first angle value based on the mutual capacitance detection signal. For example, the algorithm may be used to calculate the corresponding first angle value by substituting the signal strength of the mutual capacitance detection signal into the algorithm. Similarly, the touch chip may also be equipped with an algorithm for calculating the second angle value based on the self-capacitance detection signal.

[0045] Step S23: obtaining the opening and closing angle value of the foldable touch screen according to the first angle value and the second angle value.

[0046] In the embodiment of the present application, after obtaining the first angle value and the second angle value, the touch chip obtains the current opening and closing angle value of the foldable touch screen based on the first angle value and the second angle value. It can be understood that the present application can perform self-capacitance detection through the electrodes in the folding area of ​​the foldable touch screen, and perform mutual capacitance detection through the electrodes in the two end areas of the foldable touch screen to obtain self-capacitance detection signals and mutual capacitance detection signals, and then obtain the folding angle of the foldable touch screen based on the self-capacitance detection signals and the mutual capacitance detection signals, which can ensure that the large-angle detection of the foldable screen has better results and avoid the influence of screen aging or process deviation on the detection results.

[0047] Please refer to FIG3 , which is a flow chart of a first method for obtaining an opening and closing angle value provided in an embodiment of the present application, specifically comprising the following steps:

[0048] Step S31: determining whether the current opening and closing angle of the foldable touch screen is an acute angle or an obtuse angle according to the first angle value and / or the second angle value.

[0049] In an embodiment of the present application, when the touch chip obtains the opening and closing angle value of the foldable touch screen based on the first angle value and the second angle value, it can first determine whether the current opening and closing angle is an acute angle or an obtuse angle based on the first angle value, or it can first determine whether the current opening and closing angle is an acute angle or an obtuse angle based on the second angle value, or use the first angle value combined with the second angle value to determine whether the current opening and closing angle is an acute angle or an obtuse angle.

[0050] Step S32: When it is determined that the opening and closing angle is an acute angle, the first angle value is output as the opening and closing angle value.

[0051] In the embodiment of the present application, when the touch chip determines that the opening and closing angle of the foldable touch screen is an acute angle, since the mutual capacitance detection signal has a strong signal strength, the first angle value corresponding to the mutual capacitance detection signal can be output as the opening and closing angle value.

[0052] Step S33: When it is determined that the opening and closing angle is an obtuse angle, the second angle value is calibrated using the angle calibration coefficient, and the calibrated second angle value is output as the opening and closing angle value.

[0053] In an embodiment of the present application, when the touch chip determines that the opening and closing angle of the foldable touch screen is an obtuse angle, since the signal strength of the mutual capacitance detection signal is weak at this time, the second angle value corresponding to the self-capacitance detection signal is selected, and the second angle value is calibrated using the angle calibration coefficient before outputting the second angle value. The calibrated second angle value is output as the current opening and closing angle value of the foldable touch screen.

[0054] The angle calibration coefficient is obtained by calibrating the second angle value based on the first angle value when the opening and closing angle is an acute angle. This angle calibration coefficient can be obtained through testing. For example, before the foldable touch screen leaves the factory, the corresponding first and second angle values ​​are obtained by folding it at an acute angle, and the second angle value is calibrated using the first angle value. After the angle calibration coefficient is obtained, it can be stored in the touch chip. For example, the angle calibration coefficient = first angle value - second angle value, or the angle calibration coefficient = first angle value / second angle value, etc., which are not limited here.

[0055] Please refer to Figure 4, which is a flow chart of a second method for obtaining an opening and closing angle value provided in an embodiment of the present application. The method for obtaining an opening and closing angle value shown in Figure 4 includes steps S41 to S43, wherein steps S41 to S43 are consistent with steps S31 to S33 shown in Figure 3 and are not repeated here. The difference between the method for obtaining an opening and closing angle value shown in Figure 4 and the method for obtaining an opening and closing angle value shown in Figure 3 is that the method for obtaining an opening and closing angle value shown in Figure 4 also includes:

[0056] Step S44: when it is determined that the first angle value is less than the preset angle value and / or the strength value of the mutual capacitance detection signal is greater than the preset strength value, calibrate the second angle value using the first angle value to update the angle calibration coefficient.

[0057] In an embodiment of the present application, the angle calibration coefficient can also be updated in real time each time the foldable touch screen is opened or closed. For example, when the touch chip determines that the first angle value is less than a preset angle value, it can use the current first angle value and the second angle value to update the angle calibration coefficient. The preset angle value can be an acute angle value less than 90 degrees. It is understood that the strength value of the mutual capacitance detection signal can also correspond to an acute angle less than 90 degrees.

[0058] Understandably, as the foldable touch screen ages, the accuracy of the second angle value obtained by detection decreases, potentially affecting the accuracy of detection when the opening and closing angle is obtuse. However, by updating the angle calibration coefficients through the aforementioned steps each time the foldable touch screen is opened and closed, the latest angle calibration coefficients can still ensure the accuracy of the second angle value obtained when the opening and closing angle is obtuse, even in the face of the foldable touch screen's continued aging. This, in turn, ensures the accuracy of the output opening and closing angle value when the angle is obtuse.

[0059] Please refer to FIG5 , which is a flow chart of a third method for obtaining an opening and closing angle value provided in an embodiment of the present application, specifically comprising the following steps:

[0060] Step S51: When it is determined that the first angle value is less than the preset angle value and / or the strength value of the mutual capacitance detection signal is greater than the preset strength value, the second angle value is calibrated using the first angle value to obtain an angle calibration coefficient, and the first angle value is output as the opening and closing angle value.

[0061] Step S52: When it is determined that the first angle value is greater than or equal to the preset angle value and / or the strength value of the mutual capacitance detection signal is less than or equal to the preset strength value, the second angle value is calibrated using the angle calibration coefficient, and the calibrated second angle value is output as the opening and closing angle value.

[0062] It is understood that the preset angle value in the embodiments of the present application can be set to an acute angle less than 90 degrees, and the strength value of the mutual capacitance detection signal can also correspond to an acute angle less than 90 degrees. For example, the preset angle value can be 60 degrees. When the preset angle value is less than 60 degrees, the touch chip outputs the first angle value as the opening and closing angle value. When the preset angle value is greater than or equal to 60 degrees, the touch chip outputs the second angle value calibrated using the angle calibration coefficient as the opening and closing angle value.

[0063] Please refer to FIG6 , which is a schematic diagram of a process for obtaining a detection signal according to an embodiment of the present application, specifically including the following steps:

[0064] Step S61: acquiring a mutual capacitance detection signal at a first moment.

[0065] Step S62: obtaining a self-capacitance detection signal at the second moment.

[0066] In the embodiment of the present application, the electrodes of the foldable touch screen are mutual capacitance drive electrodes and mutual capacitance sensing electrodes. That is, the foldable touch screen is composed of mutual capacitance drive electrodes and mutual capacitance sensing electrodes. The mutual capacitance drive electrodes or mutual capacitance sensing electrodes arranged parallel to the fold of the foldable touch screen are used to generate self-capacitance detection signals. That is, the mutual capacitance drive electrodes or mutual capacitance sensing electrodes arranged parallel to the fold in the foldable touch screen can be time-multiplexed as self-capacitance sensing electrodes.

[0067] It can be understood that the touch chip can obtain a mutual capacitance detection signal from the folding area of ​​the foldable touch screen at a first moment, and reuse the mutual capacitance drive electrodes or mutual capacitance sensing electrodes arranged parallel to the fold in this folding area as self-capacitance sensing electrodes to obtain a self-capacitance detection signal at a second moment, and the first moment is close to the second moment, thereby improving the accuracy of the above-mentioned angle calibration coefficient.

[0068] In some embodiments, the electrodes of a foldable touch screen include self-capacitance sensing electrodes in the folding area, as well as mutual-capacitance drive electrodes and mutual-capacitance sensing electrodes located outside the folding area. Specifically, the foldable touch screen comprises mutual-capacitance drive electrodes, mutual-capacitance sensing electrodes, and self-capacitance sensing electrodes. The mutual-capacitance drive electrodes and mutual-capacitance sensing electrodes are used to generate mutual-capacitance detection signals, while the self-capacitance sensing electrodes are used to generate self-capacitance detection signals.

[0069] This application also provides a touch chip that connects to mutual capacitance drive electrodes and mutual capacitance sensing electrodes within a foldable touch screen. The mutual capacitance drive electrodes or mutual capacitance sensing electrodes can be time-multiplexed as self-capacitance sensing electrodes. The mutual capacitance drive electrodes and mutual capacitance sensing electrodes are used to generate mutual capacitance detection signals, while the self-capacitance sensing electrodes are used to generate self-capacitance detection signals with ground. The touch chip is used to execute the foldable touch screen detection method described in any of the above embodiments.

[0070] This application also provides a touch chip that connects mutual capacitance drive electrodes, mutual capacitance sensing electrodes, and self-capacitance sensing electrodes within a foldable touch screen. The mutual capacitance drive electrodes and mutual capacitance sensing electrodes are used to generate mutual capacitance detection signals, and the self-capacitance sensing electrodes are used to generate self-capacitance detection signals with ground. The touch chip is used to execute the foldable touch screen detection method described in any of the above embodiments.

[0071] The present application also provides a touch device, comprising a foldable touch screen and a touch chip according to any of the above embodiments. The electrodes in the folding area of ​​the foldable touch screen are used to generate a self-capacitance detection signal and constitute a self-capacitance detection area. The electrodes in the two end areas of the foldable touch screen are used to generate a mutual capacitance detection signal and constitute a mutual capacitance detection area, wherein when the foldable touch screen is opened and closed, the mutual capacitance detection signal and the self-capacitance detection signal are obtained, a first angle value is obtained according to the mutual capacitance detection signal, and a second angle value is obtained according to the self-capacitance detection signal, and the opening and closing angle value of the foldable touch screen is obtained according to the first angle value and the second angle value.

[0072] Among them, the above-mentioned process of obtaining the opening and closing angle of the foldable touch screen according to the first angle value and the second angle value specifically includes: judging whether the current opening and closing angle of the foldable touch screen is an acute angle or an obtuse angle according to the first angle value and / or the second angle value, and when it is determined that the opening and closing angle is an acute angle, outputting the first angle value as the opening and closing angle value, and when it is determined that the opening and closing angle is an obtuse angle, calibrating the second angle value using the angle calibration coefficient, and outputting the calibrated second angle value as the opening and closing angle value, wherein the angle calibration coefficient is obtained by calibrating the second angle value based on the first angle value when the opening and closing angle is an acute angle.

[0073] It is understood that the beneficial effects that can be achieved by the above-mentioned touch chip and touch device can refer to the beneficial effects of the detection method of the foldable touch screen in the above-mentioned embodiment, and will not be repeated here.

[0074] In the embodiment of the present application, a more detailed functional description of each of the above modules can be referred to the corresponding content of the aforementioned part, which will not be repeated here.

[0075] An embodiment of the present application further provides a computer storage medium storing a computer program. When the computer program is executed by a processor, the processor executes the above-mentioned method for detecting a foldable touch screen.

[0076] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When software is used for implementation, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer storage medium or transmitted through the computer storage medium. The computer instructions can be transmitted from a website, computer, server or data center to another website, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrations. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state disk (SSD)).

[0077] Those skilled in the art will appreciate that all or part of the processes in the above-described method embodiments can be implemented by instructing the relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When executed, the program can include the processes of the above-described method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks. The technical features of this embodiment and the implementation scheme can be combined in any manner unless they conflict.

[0078] The embodiments described above are merely preferred embodiments of the present application and are not intended to limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements made to the technical solutions of the present application by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present application.

Claims

1. A method for detecting a folding angle, characterized in that: Applied to a foldable touch screen, the foldable touch screen comprises a plurality of electrodes; The electrodes in the folding area of ​​the foldable touch screen are used to generate a self-capacitance detection signal and constitute a self-capacitance detection area; The electrodes in the two end regions of the foldable touch screen are used to generate mutual capacitance detection signals and constitute mutual capacitance detection regions; The detection method comprises: When the foldable touch screen is opened or closed, acquiring the mutual capacitance detection signal and the self capacitance detection signal; Obtaining a first angle value according to the mutual capacitance detection signal, and obtaining a second angle value according to the self capacitance detection signal; The opening and closing angle value of the foldable touch screen is obtained according to the first angle value and the second angle value.

2. The detection method according to claim 1, characterized in that The obtaining the opening and closing angle of the foldable touch screen according to the first angle value and the second angle value includes: Determining whether the current opening and closing angle of the foldable touch screen is an acute angle or an obtuse angle according to the first angle value and / or the second angle value; When it is determined that the opening and closing angle is an acute angle, outputting the first angle value as the opening and closing angle value; When it is determined that the opening and closing angle is an obtuse angle, the second angle value is calibrated using an angle calibration coefficient, and the calibrated second angle value is output as the opening and closing angle value; The angle calibration coefficient is obtained by calibrating the second angle value based on the first angle value when the opening and closing angle is an acute angle.

3. The detection method according to claim 2, characterized in that The step of obtaining the opening and closing angle of the foldable touch screen according to the first angle value and the second angle value further includes: When it is determined that the first angle value is less than a preset angle value and / or when it is determined that the strength value of the mutual capacitance detection signal is greater than a preset strength value, the second angle value is calibrated using the first angle value to update the angle calibration coefficient.

4. The detection method according to claim 1, characterized in that The obtaining the opening and closing angle of the foldable touch screen according to the first angle value and the second angle value includes: When it is determined that the first angle value is less than a preset angle value and / or when it is determined that the strength value of the mutual capacitance detection signal is greater than a preset strength value, the second angle value is calibrated using the first angle value to obtain an angle calibration coefficient, and the first angle value is output as the opening and closing angle value; When it is determined that the first angle value is greater than or equal to the preset angle value and / or when it is determined that the strength value of the mutual capacitance detection signal is less than or equal to the preset strength value, the second angle value is calibrated using the angle calibration coefficient, and the calibrated second angle value is output as the opening and closing angle value.

5. The detection method according to claim 1, characterized in that The electrodes of the foldable touch screen are mutual capacitance driving electrodes and mutual capacitance sensing electrodes; The mutual capacitance driving electrodes or mutual capacitance sensing electrodes arranged in parallel with the folding line in the folding area of ​​the foldable touch screen are used to generate self-capacitance detection signals.

6. The detection method according to claim 5, characterized in that The acquiring the mutual capacitance detection signal and the self capacitance detection signal includes: Acquire the mutual capacitance detection signal at a first moment; The self-capacitance detection signal is acquired at a second moment.

7. The detection method according to claim 1, characterized in that: The electrodes of the foldable touch screen include self-capacitance sensing electrodes in the folding area, and also include mutual capacitance driving electrodes and mutual capacitance sensing electrodes arranged outside the folding area; The mutual capacitance driving electrode and the mutual capacitance sensing electrode are used to generate a mutual capacitance detection signal, and the self capacitance sensing electrode is used to generate a self capacitance detection signal.

8. A touch chip, characterized in that: The touch chip is connected to the electrodes in the foldable touch screen, and is used to execute the detection method according to any one of claims 1 to 7.

9. A touch device, characterized in that: A foldable touch screen and a touch chip as claimed in claim 8, wherein the foldable touch screen comprises a plurality of electrodes; The electrodes in the folding area of ​​the foldable touch screen are used to generate a self-capacitance detection signal and constitute a self-capacitance detection area; The electrodes in the two end regions of the foldable touch screen are used to generate mutual capacitance detection signals and constitute mutual capacitance detection regions; When the foldable touch screen is opened or closed, acquiring the mutual capacitance detection signal and the self capacitance detection signal; Obtaining a first angle value according to the mutual capacitance detection signal, and obtaining a second angle value according to the self capacitance detection signal; The opening and closing angle value of the foldable touch screen is obtained according to the first angle value and the second angle value.

10. The touch control device according to claim 9, wherein: The obtaining the opening and closing angle of the foldable touch screen according to the first angle value and the second angle value includes: Determining whether the current opening and closing angle of the foldable touch screen is an acute angle or an obtuse angle according to the first angle value and / or the second angle value; When it is determined that the opening and closing angle is an acute angle, outputting the first angle value as the opening and closing angle value; When it is determined that the opening and closing angle is an obtuse angle, the second angle value is calibrated using an angle calibration coefficient, and the calibrated second angle value is output as the opening and closing angle value; The angle calibration coefficient is obtained by calibrating the second angle value based on the first angle value when the opening and closing angle is an acute angle.

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