Folding display device, folding angle detection method and chip

Abstract

The invention discloses a folding display device, a folding angle detection method and a chip, after it is determined that the folding display device works in a touch detection mode or an included angle detection mode, electrodes of a touch screen are controlled to be in a target state, touch detection can be achieved, detection of the folding angle of the touch screen can also be achieved, and the folding angle detection efficiency is improved. No additional angle detection sensor equipment is needed, and the problem that in an existing scheme, cost and weight are increased in folding angle detection is solved.

Description

Technical Field

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

[0002] The folding angle of a folding display device is usually detected by an accelerometer or a Hall sensor. These sensors can accurately detect the opening and closing angle of the screen, but they also increase the cost and weight of the product. Because hardware devices such as sensors need to be added, and the circuit board and software need to be optimized and debugged accordingly, all of which will increase the cost and production difficulty of the product. In addition, the sensor itself will also increase the weight of the folding display device, which is not friendly to consumers. Summary of the invention

[0003] The purpose of this application is to provide a folding display device, a folding angle detection method and a chip, which can realize both touch detection and angle detection of the folding display device without the need for additional sensor equipment, thereby solving the problems of increased cost and weight of folding angle detection in existing solutions.

[0004] In order to solve the above technical problems, the present application provides a foldable display device, comprising:

[0005] a first folding portion and a second folding portion;

[0006] A first touch screen, which is a whole-piece foldable screen, comprising a first sub-touch screen and a second sub-touch screen that are relatively foldable, wherein the first sub-touch screen and the second sub-touch screen are respectively covered on surfaces of the first folding portion and the second folding portion;

[0007] A plurality of first electrodes, arranged on the first sub-touch screen;

[0008] A plurality of second electrodes are arranged on the second sub-touch screen, and each of the second electrodes is arranged in parallel with each of the first electrodes;

[0009] a plurality of third electrodes, wherein two ends of each of the third electrodes are respectively arranged on the first sub-touch screen and the second sub-touch screen, each of the third electrodes extends from an end of the first sub-touch screen to an end of the second sub-touch screen, and each of the third electrodes is cross-insulated from each of the first electrodes and each of the second electrodes;

[0010] A controller is connected to each of the first electrodes, each of the second electrodes and each of the third electrodes, respectively. The controller determines the working mode of the first touch screen and controls each electrode to work in a target state. The working mode of the first touch screen includes a touch detection mode and an angle detection mode, and the target state includes a driving state, a receiving state and a third state.

[0011] In one embodiment, the first sub-touch screen and the second sub-touch screen are foldable relative to a folding line, the first electrode and the second electrode are parallel to the folding line, and the third electrode is perpendicular to the folding line.

[0012] In one embodiment, when the first touch screen operates in the touch detection mode, the first electrode and the second electrode operate in a driving state, and the third electrode operates in a receiving state, or the first electrode and the second electrode operate in a receiving state, and the third electrode operates in a driving state;

[0013] The controller determines a touch position according to capacitance values ​​between the first electrode and the third electrode, and between the second electrode and the third electrode.

[0014] In one embodiment, when the controller detects that the distance between the approaching object and the first touch screen is less than a preset distance, the controller controls the first touch screen to operate in the touch detection mode.

[0015] In one embodiment, the controller specifically detects a distance between an approaching object and a preset area of ​​the first touch screen;

[0016] The preset area is a touch display area which has a preset interval with the frame of the foldable display device.

[0017] In one embodiment, when the first touch screen operates in the angle detection mode,

[0018] The first electrode operates in the driving state, and the second electrode operates in the receiving state, or the first electrode operates in the receiving state, and the second electrode operates in the driving state;

[0019] The third electrode is in a third state, and the third state is any one of floating, connected to the system ground, or connected to a fixed potential;

[0020] The controller determines a folding angle between the first folding portion and the second folding portion according to a capacitance value between the first electrode and the second electrode.

[0021] In one embodiment, when no approaching object is detected in a preset area, the controller controls the first touch screen to operate in the angle detection mode.

[0022] In one embodiment, when the controller detects the pressure applied to the frame of the foldable display device, the controller controls the first touch screen to operate in the angle detection mode.

[0023] In one embodiment, it also includes:

[0024] A second touch screen is provided on the other side of the first folding portion or the second folding portion, for activating a touch display function when the first folding portion and the second folding portion are completely folded.

[0025] In one embodiment, the controller controls the folding display device to display a preset screen or provide a preset function interface according to the angle detected in the angle detection mode.

[0026] In order to solve the above technical problems, the present application also provides a folding angle detection method, which is applied to the folding display device as described above, and the method includes:

[0027] Determining an operating mode of the first touch screen, wherein the operating mode of the first touch screen includes a touch detection mode and an angle detection mode;

[0028] Each electrode is controlled to work in a target state according to the determined working mode. The target state includes a driving state, a receiving state and a third state. The third state is any one of floating, connecting to a system ground or connecting to a fixed potential.

[0029] In one embodiment, when it is determined that the working mode of the first touch screen is the angle detection mode, controlling each electrode to work in a target state according to the determined working mode includes:

[0030] Controlling the first electrode to work in the driving state and the second electrode to work in the receiving state, or controlling the first electrode to work in the receiving state and the second electrode to work in the driving state;

[0031] Controlling the third electrode to be in a third state;

[0032] After controlling each electrode to work in a target state according to the determined working mode, the method further includes:

[0033] A capacitance value between the first electrode and the second electrode is obtained, and the folding angle is determined according to the capacitance value.

[0034] In one embodiment, the process of determining that the working mode of the first touch screen is the angle detection mode according to target requirements includes: determining that the working mode of the first touch screen is the angle detection mode when no approaching object is detected in the preset area, or when pressure applied to the frame of the folding display device is detected.

[0035] In order to solve the above technical problems, the present application also provides a chip, including:

[0036] Memory for storing computer programs;

[0037] A controller is used to implement the steps of the folding angle detection method as described above when executing the computer program.

[0038] The present application provides a folding display device, a folding angle detection method and a chip. A controller is used to determine whether the folding display device is operating in a touch detection mode or an angle detection mode, and the electrodes are controlled to a target state. Through the electrodes of the touch screen, both touch detection and detection of the folding angle of the touch screen can be achieved. No additional sensor equipment for detecting the angle is required, which solves the problems of increased cost and weight in folding angle detection in existing solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the prior art and the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 A schematic diagram of a foldable display device provided in the present application;

[0041] Figure 2 A schematic diagram of a folding angle detection method provided in this application;

[0042] Figure 3 A schematic diagram of a chip provided in this application. DETAILED DESCRIPTION

[0043] The core of this application is to provide a folding display device, a folding angle detection method and a chip, which can realize both touch detection and angle detection of the folding display device without the need for additional sensor equipment, thereby solving the problems of increased cost and weight in folding angle detection in existing solutions.

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] The present application provides a foldable display device, such as Figure 1 As shown, the device comprises:

[0046] a first folding portion and a second folding portion;

[0047] The first touch screen is a whole-piece foldable screen, including a relatively foldable first sub-touch screen 11 and a second sub-touch screen 12. The first sub-touch screen 11 and the second sub-touch screen 12 are formed as one body without segmentation or splicing. The first sub-touch screen 11 and the second sub-touch screen 12 cover the surfaces of the first folding part and the second folding part respectively;

[0048] A plurality of first electrodes 13 are provided on the first sub-touch screen 11;

[0049] A plurality of second electrodes 14 are disposed on the second sub-touch screen 12 , and each second electrode 14 is disposed in parallel with each first electrode 13 ;

[0050] A plurality of parallel third electrodes 15, with two ends of each third electrode 15 respectively disposed on the first sub-touch screen 11 and the second sub-touch screen 12, each third electrode 15 extending from an end of the first sub-touch screen 11 to an end of the second sub-touch screen 12, and each third electrode 15 and each first electrode 13 and each second electrode 14 are cross-insulated;

[0051] The controller is connected to each first electrode 13, each second electrode 14 and each third electrode 15 respectively. The controller determines the working mode of the first touch screen and controls each electrode to work in a target state. The working mode of the first touch screen includes a touch detection mode and an angle detection mode. The target state includes a driving state, a receiving state and a third state. The third state is any one of floating, connected to the system ground or connected to a fixed potential.

[0052] The first electrodes 13, the second electrodes 14 and the third electrodes 15 are connected together through a controller, and the controller can control the working state of the electrodes according to the working mode of the first touch screen, so that the first touch screen can work in a target mode. The target state includes a driving state, a receiving state and a third state, and the working mode of the first touch screen includes a touch detection mode and an angle detection mode.

[0053] Specifically, when the first touch screen is in the touch detection mode, the controller controls the corresponding electrodes to work so as to detect and respond to the user's touch operation. When the first touch screen is in the angle detection mode, the controller adjusts the working state of the electrodes to detect the opening and closing angle of the folding screen. The folding display device described in this embodiment can flexibly provide more functions, avoiding the use of hardware devices such as sensors mentioned in the background technology, thereby reducing cost and weight.

[0054] In one embodiment, the first sub-touch screen 11 and the second sub-touch screen 12 are foldable relative to the folding line 16 , the first electrode 13 and the second electrode 14 are parallel to the folding line 16 , and the third electrode 15 is perpendicular to the folding line 16 .

[0055] When the touch function is used, the intersection points between the electrodes that intersect vertically can detect the touch position of the contact object, identify user input signals, and respond accordingly.

[0056] When the first touch screen works in the touch detection mode, the first electrode 13 and the second electrode 14 work in the driving state, and the third electrode 15 works in the receiving state, or the first electrode 13 and the second electrode 14 work in the receiving state, and the third electrode 15 works in the driving state;

[0057] The controller determines the touch position according to the capacitance values ​​between the first electrode 13 and the third electrode 15 , and the capacitance values ​​between the second electrode 14 and the third electrode 15 .

[0058] This embodiment relates to different working states of the first touch screen in the touch detection mode. Specifically, the first electrode 13 and the second electrode 14 are in the driving state at the same time, and the third electrode 15 is in the receiving state; or the first electrode 13 and the second electrode 14 are in the receiving state at the same time, and the third electrode 15 is in the driving state.

[0059] In the touch detection mode, the driving state of the first electrode 13 and the second electrode 14 means that they apply voltage to the surface of the touch screen, generating an electric field on the touch screen.

[0060] At the same time, the third electrode 15 is in a receiving state, and senses the change in capacitance between the first electrode 13 and the second electrode 14, and transmits these capacitance changes to the controller. By comparing the change in capacitance value of the third electrode 15, the controller can determine the precise coordinates of the touch position.

[0061] In this embodiment, by controlling the different working states of the first electrode 13, the second electrode 14 and the third electrode 15, the controller can determine the touch position according to the change of the capacitance value to achieve touch detection.

[0062] When no touch object approaches the first touch screen, it is assumed that the capacitance calculated by the processing unit of the controller is R; when the touch object approaches the first touch screen, the capacitance is reduced to R'. When the capacitance R' is less than the threshold TH, the controller can determine that the touch object is near the first touch screen and causes a touch event. It must be noted that when other objects, such as a stylus, approach the first touch screen, it may also cause the capacitance to change, so the controller can also determine it as a touch event when the capacitance exceeds another preset threshold.

[0063] In one embodiment, when the controller detects that the distance between the approaching object and the first touch screen is less than a preset distance, the controller controls the first touch screen to operate in a touch detection mode. The approaching object may be a human body, a stylus, or the like.

[0064] In this embodiment, when the controller detects that the distance between the approaching object and the first touch screen is less than a preset distance, it controls the first touch screen to switch to a touch detection mode, in which the first touch screen can detect contact between the approaching object and its surface and respond to the touch input.

[0065] When the controller detects that the distance between the approaching object and the first touch screen is less than the preset distance, it means that an object is close to the first touch screen, and it is possible that the user wants to perform a touch operation. In order to realize the interaction between the user and the first touch screen, the controller switches the first touch screen to a touch detection mode so as to accurately detect and respond to the user's touch input.

[0066] When the distance between the approaching object and the first touch screen is small enough, the capacitance change value becomes relatively large, and the controller determines that there is a touch demand and switches to the touch detection mode. This design can enhance the user experience and avoid unnecessary operations caused by false triggering or interference. At the same time, the preset distance can also be set according to actual needs to meet the touch sensitivity requirements in different scenarios.

[0067] In one embodiment, the controller specifically detects the distance between the approaching object and a preset area of ​​the first touch screen; the preset area is a touch display area that has a preset distance from the frame of the folding display device.

[0068] In this embodiment, the controller is responsible for detecting the distance between the approaching object and the preset area of ​​the first touch screen. When the distance between the approaching object and the first touch screen is less than the preset distance, the controller switches the first touch screen to the touch detection mode.

[0069] The preset area is a touch display area with a preset interval from the frame of the foldable display device. In one embodiment, the preset interval is 0.5 to 1 cm. Since the preset area is a central area surrounded by the frame, the user is more likely to place a finger or stylus on the area for operation. Setting the preset area helps to reduce misoperation and can provide a better user experience.

[0070] In one embodiment, when the first touch screen operates in the angle detection mode, the first electrode 13 operates in a driving state and the second electrode 14 operates in a receiving state, or the first electrode 13 operates in a receiving state and the second electrode 14 operates in a driving state;

[0071] The third electrode 15 is in a third state, which is any one of floating, connected to the system ground or connected to a fixed potential;

[0072] The controller determines the folding angle between the first folding portion and the second folding portion according to the capacitance value between the first electrode 13 and the second electrode 14 .

[0073] When the first touch screen works in the angle detection mode, the first electrode 13 and the second electrode 14 exhibit different working states. The controller determines the folding angle between the first folding portion and the second folding portion according to the capacitance value between the first electrode 13 and the second electrode 14. In other words, when the touch screen is in the angle detection mode, the controller calculates the folding angle by measuring the capacitance value formed between the first electrode 13 and the second electrode 14, thereby realizing the control of the display state of the folding display device.

[0074] In one embodiment, when no approaching object is detected in the preset area, the controller controls the first touch screen to operate in the angle detection mode.

[0075] In this embodiment, when no approaching object is detected in the preset area, it can be understood that there is no need for touch operation, and the controller switches the first touch screen to the angle detection mode.

[0076] The preset area can be the entire display area of ​​the device, or a certain area pre-set on the device, specifically a central area enclosed by a preset distance from the frame, and whether an object is approaching the area can be determined by the capacitance change of the electrode in the receiving state. When the controller does not detect that an approaching object has entered the preset area, it controls the first touch screen to start the angle detection mode. The first touch screen automatically switches modes in appropriate scenarios to improve the convenience of use of the device and user experience.

[0077] In one embodiment, the controller controls the first touch screen to operate in an angle detection mode when the controller detects pressure applied to the frame of the foldable display device.

[0078] In this embodiment, when the controller detects the pressure applied to the frame of the foldable display device, it means that the user has applied force to the frame of the device, and the controller will switch the first touch screen to the angle detection mode.

[0079] When the user applies pressure to the frame of the foldable display device, for example, by gripping the edge of the device or pressing the frame, the controller determines the user's intention through the sensed pressure signal, that is, the user wants to detect the folding angle. Therefore, after detecting such a pressure signal, the controller switches the first touch screen to the angle detection mode to meet the user's personalized needs. This intelligent control system can provide a better user experience.

[0080] In one embodiment, it also includes:

[0081] A second touch screen is provided on the other side of the first folding part or the second folding part, and is used to activate the touch display function when the first folding part and the second folding part are completely folded. That is, the second touch screen activates the touch display function when the folding angle between the first folding part and the second folding part is zero degree, and the second touch screen realizes normal touch and display functions.

[0082] Through this design, users can continue to use the folding display device when it is fully folded, rather than being limited to touch operations in the unfolded state. This improves the usability and flexibility of the folding display device, and users can operate and use it in the fully folded state, angled state, or fully unfolded state as needed.

[0083] In one embodiment, the controller controls the folding display device to display a preset screen or provide a preset function interface according to the angle detected in the angle detection mode. When the user is using the folding display device, the controller can adjust the display content according to the folding angle of the device. Based on the detected folding angle, the controller can control the folding display device to display different screens or provide different function interfaces. For example, when the folding angle is less than 90°, the controller can display a preset screen or multiple changing screens. When the folding angle is greater than 90°, a split function interface can be provided, in which different applications or functions can be run or displayed simultaneously in different screen areas, or when the folding angle is greater than 90°, the tiled screen displays the complete function interface, and the vertical screen displays the specific screen of the selected function. Such a design enables users using the folding display device to adjust and select appropriate display content according to different folding angles, and to easily access and operate different functions. This adaptive display function can enhance the user experience and provide more flexibility and convenience.

[0084] To solve the background technical problem, the present application also provides a folding angle detection method, such as Figure 2 As shown, applied to the folding display device as described above, the method includes:

[0085] S1: Determine a working mode of the first touch screen, where the working mode of the first touch screen includes a touch detection mode and an angle detection mode;

[0086] S2: Controlling each electrode to work in a target state according to the determined working mode. The target state includes a driving state, a receiving state and a third state. The third state is any one of floating, connecting to a system ground or connecting to a fixed potential.

[0087] The present application also describes a folding angle detection method in a folding display device. The method first determines the working mode of the first touch screen, including a touch detection mode and an angle detection mode. Then, according to the determined working mode, each electrode is controlled to work in a target state, including a driving state, a receiving state, and a third state. The method can effectively detect the folding angle and realize precise control and operation of the device.

[0088] When the working mode of the first touch screen is the angle detection mode, the first electrode 13 is controlled to work in the driving state and the second electrode 14 is controlled to work in the receiving state, or the first electrode 13 is controlled to work in the receiving state and the second electrode 14 is controlled to work in the driving state;

[0089] Controlling the third electrode 15 to be in a third state, wherein the third state is any one of floating, connected to a system ground, or connected to a fixed potential;

[0090] The capacitance value between the first electrode 13 and the second electrode 14 is obtained, and the folding angle is determined according to the capacitance value.

[0091] In one embodiment, when no approaching object is detected in the preset area, or when pressure applied to the frame of the foldable display device is detected, it is determined that the working mode of the first touch screen is the angle detection mode.

[0092] Specifically, when no approaching object is detected in the preset area or frame pressure is detected, selecting the angle detection mode as the working mode of the first touch screen can provide a more convenient user experience.

[0093] For the introduction of the folding angle detection method, please refer to the above embodiment, and this application will not go into details here.

[0094] In order to solve the above technical problems, the present application also provides a chip, including:

[0095] A memory 31, used for storing computer programs;

[0096] The controller 32 is used to implement the steps of the folding angle detection method as described above when executing a computer program.

[0097] For the introduction of the chip, please refer to the above embodiments, and this application will not go into details here.

[0098] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0099] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A foldable display device, characterized in that: include: a first folding portion and a second folding portion; A first touch screen, which is a whole-piece foldable screen, comprising a first sub-touch screen and a second sub-touch screen that are relatively foldable, wherein the first sub-touch screen and the second sub-touch screen are respectively covered on surfaces of the first folding portion and the second folding portion; A plurality of first electrodes, arranged on the first sub-touch screen; A plurality of second electrodes are arranged on the second sub-touch screen, and each of the second electrodes is arranged in parallel with each of the first electrodes; a plurality of third electrodes, wherein two ends of each of the third electrodes are respectively arranged on the first sub-touch screen and the second sub-touch screen, each of the third electrodes extends from an end of the first sub-touch screen to an end of the second sub-touch screen, and each of the third electrodes is cross-insulated from each of the first electrodes and each of the second electrodes; A controller is connected to each of the first electrodes, each of the second electrodes and each of the third electrodes, respectively. The controller determines the working mode of the first touch screen and controls each electrode to work in a target state. The working mode of the first touch screen includes a touch detection mode and an angle detection mode. The target state includes a driving state, a receiving state and a third state. The third state is any one of floating, connected to the system ground or connected to a fixed potential.

2. The foldable display device according to claim 1, wherein: The first sub-touch screen and the second sub-touch screen are foldable relative to a folding line, the first electrode and the second electrode are parallel to the folding line, and the third electrode is perpendicular to the folding line.

3. The foldable display device according to claim 1, wherein: When the first touch screen operates in the touch detection mode, the first electrode and the second electrode operate in a driving state, and the third electrode operates in a receiving state, or the first electrode and the second electrode operate in a receiving state, and the third electrode operates in a driving state; The controller determines a touch position according to capacitance values ​​between the first electrode and the third electrode, and between the second electrode and the third electrode.

4. The foldable display device according to claim 1, wherein: When the controller detects that the distance between the approaching object and the first touch screen is less than a preset distance, the controller controls the first touch screen to operate in the touch detection mode.

5. The foldable display device according to claim 4, characterized in that: The controller specifically detects the distance between the approaching object and a preset area of ​​the first touch screen; The preset area is a touch display area which has a preset interval with the frame of the foldable display device.

6. The foldable display device according to claim 1, wherein: When the first touch screen operates in the angle detection mode; The first electrode operates in the driving state, and the second electrode operates in the receiving state, or the first electrode operates in the receiving state, and the second electrode operates in the driving state; The third electrode is in a third state; The controller determines a folding angle between the first folding portion and the second folding portion according to a capacitance value between the first electrode and the second electrode.

7. The foldable display device according to claim 6, wherein: When the controller does not detect an approaching object in the preset area, the controller controls the first touch screen to operate in the angle detection mode.

8. The foldable display device according to claim 6, wherein: The controller controls the first touch screen to operate in the angle detection mode when the controller detects the pressure applied to the frame of the foldable display device.

9. The foldable display device according to claim 1, wherein: Also includes: A second touch screen is provided on the other side of the first folding portion or the second folding portion, for activating a touch display function when the first folding portion and the second folding portion are completely folded.

10. The foldable display device according to claim 1, wherein: The controller controls the folding display device to display a preset screen or provide a preset function interface according to the angle detected in the angle detection mode.

11. A folding angle detection method, characterized in that: Applicable to the folding display device according to any one of claims 1 to 10, the folding display device comprising: a first folding portion and a second folding portion; A first touch screen, which is a whole-piece foldable screen, comprising a first sub-touch screen and a second sub-touch screen that are relatively foldable, wherein the first sub-touch screen and the second sub-touch screen are respectively covered on surfaces of the first folding portion and the second folding portion; A plurality of first electrodes, arranged on the first sub-touch screen; A plurality of second electrodes are arranged on the second sub-touch screen, and each of the second electrodes is arranged in parallel with each of the first electrodes; a plurality of third electrodes, wherein two ends of each of the third electrodes are respectively arranged on the first sub-touch screen and the second sub-touch screen, each of the third electrodes extends from an end of the first sub-touch screen to an end of the second sub-touch screen, and each of the third electrodes is cross-insulated from each of the first electrodes and each of the second electrodes; The folding angle detection method comprises: Determining an operating mode of the first touch screen, wherein the operating mode of the first touch screen includes a touch detection mode and an angle detection mode; Each electrode is controlled to work in a target state according to the determined working mode. The target state includes a driving state, a receiving state and a third state. The third state is any one of floating, connecting to a system ground or connecting to a fixed potential.

12. The folding angle detection method according to claim 11, characterized in that: When it is determined that the working mode of the first touch screen is the angle detection mode, controlling each electrode to work in a target state according to the determined working mode includes: Controlling the first electrode to work in the driving state and the second electrode to work in the receiving state, or controlling the first electrode to work in the receiving state and the second electrode to work in the driving state; Controlling the third electrode to be in a third state, wherein the third state is any one of floating, connected to a system ground, or connected to a fixed potential; After controlling each electrode to work in a target state according to the determined working mode, the method further includes: A capacitance value between the first electrode and the second electrode is obtained, and the folding angle is determined according to the capacitance value.

13. The folding angle detection method according to claim 11, characterized in that: The process of determining the working mode of the first touch screen as the angle detection mode according to the target requirement includes: When no approaching object is detected in the preset area, or when pressure applied to the frame of the foldable display device is detected, it is determined that the working mode of the first touch screen is the angle detection mode.

14. A chip, characterized in that: include: Memory for storing computer programs; A controller, used to implement the steps of the folding angle detection method as described in any one of claims 11 to 13 when executing the computer program.

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