A flexible touch display panel and its folding angle detection method and system

Abstract

The present invention provides a flexible touch display panel and a folding angle detection method and system thereof. The flexible touch display panel includes at least one bending region and non-bending regions located on both sides of the bending region, and both the bending region and the non-bending region have touch electrodes. The method includes: inputting a first scanning signal to the touch electrode and obtaining the channel capacitance of the touch electrode; determining whether the channel capacitance is greater than a sleep threshold; if so, controlling the flexible touch display panel to enter a sleep state; if not, determining the capacitance range within which the channel capacitance lies, and determining the current folding angle of the flexible touch display panel based on the corresponding relationship between the capacitance range and the folding angle. The present invention obtains the folding angle of the flexible touch display panel by using the sensing signal of the touch electrode, i.e., the channel capacitance, and the corresponding relationship between the channel capacitance range and the folding angle. This not only improves the accuracy of folding angle detection, but also reduces the complexity and manufacturing cost of the flexible touch display panel.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and more particularly to a flexible touch display panel and a folding angle detection method and system thereof. Background Art

[0002] With the development of display technology, flexible display technology is being applied more and more widely. Existing flexible display panels have at least one foldable area, namely a bending area, and the flexible display panel can be folded along the direction of the bending area.

[0003] During the folding process of the flexible display panel, different folding states can correspond to different display states. For example, when the non-bending areas on both sides of the bending area overlap, the flexible display panel will enter a standby state. In order to achieve different display states corresponding to different folding states, it is necessary to install additional detection sensors for detecting the folding angle in the flexible display panel, such as photoelectric sensors and mechanical sensors. However, the installation of additional sensors not only makes the structure of the flexible display panel more complex, but also leads to higher production costs of the flexible display panel. Summary of the Invention

[0004] In view of this, the present invention provides a flexible touch display panel and its folding angle detection method and system to solve the problem that the additional detection sensor for detecting the folding angle in the existing flexible display panel makes the structure of the flexible display panel more complicated and the production cost higher.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A method for detecting a folding angle of a flexible touch display panel, wherein the flexible touch display panel includes at least one bending region and non-bending regions located on both sides of the bending region, wherein both the bending region and the non-bending region have touch electrodes, comprising:

[0007] inputting a first scanning signal to the touch electrode and acquiring a channel capacitance of the touch electrode;

[0008] Determining whether the channel capacity is greater than a sleep threshold;

[0009] If so, controlling the flexible touch display panel to enter a dormant state;

[0010] If not, the capacitance range of the channel capacitance is determined, and the current folding angle of the flexible touch display panel is determined according to the corresponding relationship between the capacitance range and the folding angle.

[0011] A folding angle detection system for a flexible touch display panel, applied to the folding angle detection method described above, comprises a driving module and a processing module;

[0012] The driving module is used to input a first scanning signal to the touch electrode and obtain a channel capacitance of the touch electrode;

[0013] The processing module is used to determine whether the channel capacitance is greater than a sleep threshold; if so, control the flexible touch display panel to enter a sleep state; if not, determine the capacitance interval of the sensing channel capacitance, and determine the current folding angle of the flexible touch display panel based on the correspondence between the capacitance interval and the folding angle.

[0014] A flexible touch display panel includes the folding angle detection system described above.

[0015] Compared with the prior art, the technical solution provided by the present invention has the following advantages:

[0016] The flexible touch display panel and its folding angle detection method and system provided by the present invention input a first scanning signal to the touch electrodes, obtain the channel capacitance of the touch electrodes, and then determine whether the channel capacitance is greater than a sleep threshold. If so, the flexible touch display panel is controlled to enter a sleep state. If not, the capacitance range within which the channel capacitance falls is determined, and the current folding angle of the flexible touch display panel is determined based on the correspondence between the capacitance range and the folding angle. In other words, the present invention obtains the folding angle of the flexible touch display panel by using the channel capacitance, the sensing value between the touch electrodes, and the correspondence between the channel capacitance range and the folding angle. This not only improves the accuracy of folding angle detection, but also reduces the complexity and manufacturing cost of the flexible touch display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of a top view of the flexible touch display panel provided by an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of a bent state of a flexible touch display panel provided by an embodiment of the present invention;

[0020] Figure 3 A flow chart of a method for detecting a folding angle of a flexible touch display panel provided in an embodiment of the present invention;

[0021] Figure 4A flow chart of another folding angle detection method provided by an embodiment of the present invention;

[0022] Figure 5 A schematic top view of another flexible touch display panel 1 provided in an embodiment of the present invention;

[0023] Figure 6 This is a structural diagram of a folding angle detection system for a flexible touch display panel 1 provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] As described in the background art, in existing flexible display panels, additional detection sensors are installed to detect the folding angle of the flexible display panel. However, this not only makes the structure of the flexible display panel more complicated, but also leads to higher production costs of the flexible display panel.

[0025] The inventors' research found that when the flexible display panel is folded, the touch electrodes in the non-bending areas on both sides of the bending area will produce mutual induction in the non-touch state, and the sensing value or channel capacitance of the touch electrodes will be different for different folding angles. For example, the smaller the folding angle, the larger the channel capacitance, and the larger the folding angle, the smaller the channel capacitance.

[0026] Based on this, the present invention provides a method for detecting the folding angle of a flexible touch display panel to overcome the above-mentioned problems existing in the prior art. The flexible touch display panel includes at least one bending area and non-bending areas located on both sides of the bending area. The bending area and the non-bending area both have touch electrodes. The detection method includes:

[0027] Input a first scanning signal to the touch electrode and obtain the channel capacitance of the touch electrode; determine whether the channel capacitance is greater than a sleep threshold; if so, control the flexible touch display panel to enter a sleep state; if not, determine the capacitance interval in which the channel capacitance is located, and determine the current folding angle of the flexible touch display panel based on the correspondence between the capacitance interval and the folding angle.

[0028] The present invention also provides a folding angle detection system for a flexible touch display panel, comprising a driving module and a processing module; the driving module is used to input a first scanning signal to the touch electrode and obtain the channel capacitance of the touch electrode; the processing module is used to determine whether the channel capacitance is greater than a sleep threshold, and if so, control the flexible touch display panel to enter a sleep state; if not, determine the capacitance range in which the sensing channel capacitance is located, and determine the current folding angle of the flexible touch display panel based on the correspondence between the capacitance range and the folding angle.

[0029] The present invention also provides a flexible touch display panel, comprising the folding angle detection system described above.

[0030] The flexible touch display panel and its folding angle detection method and system provided by the present invention obtain the folding angle of the flexible touch display panel through the corresponding relationship between the sensing value of the touch electrode, i.e., the channel capacitance, and the channel capacitance range and the folding angle, which not only improves the accuracy of folding angle detection but also reduces the complexity and production cost of the flexible touch display panel.

[0031] The above is the core idea of the present invention. In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] An embodiment of the present invention provides a method for detecting the folding angle of a flexible touch display panel. The flexible touch display panel is a flexible touch display panel integrated with a touch electrode layer. Optionally, the touch electrode layer is embedded in the flexible touch display panel. Furthermore, the flexible touch display panel includes an organic light-emitting flexible touch display panel, etc.

[0033] like Figure 1 As shown, Figure 1 A schematic top-down structural diagram of a flexible touch display panel provided in an embodiment of the present invention, wherein the flexible touch display panel 1 includes at least one bending area A1 and non-bending areas A2 and non-bending areas A3 located on both sides of the bending area A1. For example, the non-bending area A2 and / or the non-bending area A3 can be bent along the axis O toward the inside or outside of the paper surface. The bending area A1 and the non-bending areas A2 and A3 all have a touch electrode layer, and the touch electrode layer includes multiple touch electrodes.

[0034] In this embodiment, Figure 1 As shown, the touch electrodes include first touch electrodes 10 and second touch electrodes 11. A plurality of first touch electrodes 10 are arranged in sequence along a first direction X, and a plurality of second touch electrodes 11 are arranged in sequence along a second direction Y, with the first direction X being perpendicular to the second direction Y. A driving module 12 inputs touch detection signals to the first touch electrodes 10 and detects sensing signals output by the second touch electrodes 11. When the flexible touch display panel is touched, the capacitance at the touch location changes, and the sensing signals output by the second touch electrodes 11 also change. The driving module 12 determines the horizontal and vertical coordinates of the touch location based on the changes in the sensing signals.

[0035] In this embodiment, the touch electrodes are mutual-capacitive touch electrodes as an example for description, but the present invention is not limited thereto. In another embodiment of the present invention, the touch electrodes may also be self-capacitive touch electrodes.

[0036] like Figure 2 As shown, Figure 2 This is a schematic diagram of a flexible touch display panel in a bent state according to an embodiment of the present invention. Two non-bending regions A2 and A3 are bent in one direction along the bending axis O of bending region A1. The angle α between the two non-bending regions A2 and A3 of the bent flexible touch display panel 1 is the folding angle of the flexible touch display panel. It should be noted that the flexible touch display panel 1 according to the embodiment of the present invention may have multiple bending regions. While only one bending region A1 is used as an example in this embodiment, the present invention is not limited thereto.

[0037] like Figure 3 As shown, Figure 3 A flow chart of a method for detecting a folding angle of a flexible touch display panel provided in an embodiment of the present invention, the method comprising:

[0038] S301: inputting a first scanning signal to a touch electrode and obtaining a channel capacitance of the touch electrode;

[0039] S302: Determine whether the channel capacity is greater than the sleep threshold, if so, proceed to S303, if not, proceed to S304;

[0040] S303: Controlling the flexible touch display panel to enter a dormant state;

[0041] S304: Determine a capacitance interval in which the channel capacitance lies, and determine a current folding angle of the flexible touch display panel according to a correspondence between the capacitance interval and the folding angle.

[0042] It should be noted that, when the touch electrodes are mutual-capacitive touch electrodes, inputting the first scan signal to the touch electrodes and obtaining the channel capacitance of the touch electrodes includes: inputting the first scan signal to the first touch electrode 10 and obtaining the channel capacitance of the second touch electrode 11. When the touch electrodes are self-capacitive touch electrodes, inputting the first scan signal to the touch electrodes and obtaining the channel capacitance of the touch electrodes includes: inputting the first scan signal to the touch electrodes and obtaining the channel capacitance of the touch electrodes.

[0043] When the flexible touch display panel 1 is not touched, since there is a scanning signal, i.e., an electromagnetic field, on the first touch electrode 10, the electromagnetic field of the first touch electrode 10 in the non-bending area A2 and the electromagnetic field of the first touch electrode 10 in the non-bending area A3 will affect each other, causing the sensing signal output by the second touch electrode 11 to change, i.e., the channel capacitance detected by the second touch electrode 11 to change. Furthermore, different folding angles α result in different mutual induction between the electromagnetic fields and different changes in the channel capacitance. The smaller the folding angle α, the larger the area of the induced magnetic field between the non-bending area A2 and the non-bending area A3, the stronger the influence of the magnetic field, and the greater the change in the channel capacitance.

[0044] Based on this, an embodiment of the present invention pre-obtains the channel capacitance of the second touch electrode 11 at different folding angles α. Then, to reduce the number of comparisons and the amount of calculation, the channel capacitance can be divided into multiple intervals, and the corresponding relationship between the channel capacitance intervals and the folding angles can be obtained. After obtaining the real-time channel capacitance, it is first compared with the channel capacitance interval threshold to obtain the channel capacitance interval in which it is located. Then, based on the corresponding relationship between the channel capacitance interval and the folding angle, the folding angle α corresponding to the real-time channel capacitance is determined. It should be noted that the folding angle α can be a specific angle value or an angle interval.

[0045] When the folding angle α is 0 or approximately 0, the non-bending area A2 and the non-bending area A3 overlap. At this time, the user can no longer view the display content of the flexible touch display panel 1. Therefore, it is necessary to control the flexible touch display panel 1 to enter a dormant state. In addition, when the folding angle α is greater than 0° and less than or equal to 180°, the flexible touch display panel 1 is controlled to enter a normal working state to display the image, detect the touch position, and detect the folding angle.

[0046] During the folding angle detection process of the flexible touch display panel 1, the driving module 12 continuously inputs a first scanning signal to the first touch electrode 10 and obtains a sensing signal output by the second touch electrode 11. When the flexible touch display panel 1 is touched, the driving module 12 determines the touch location based on the change in the sensing signal, i.e., the sensing signal output by the second touch electrode 11. When the flexible touch display panel 1 is not touched but the sensing signal output by the second touch electrode 11 changes, the driving module 12 transmits the sensing signal output by the second touch electrode 11 to the processing module of the flexible touch display panel 1, so that the processing module determines the folding angle α based on the sensing signal, i.e., the channel capacitance. Because the change in the sensing signal when touched is much greater than the change in the sensing signal when folded, the driving module 12 can determine whether the flexible touch display panel 1 is touched or untouched but folded based on the magnitude of the change in the sensing signal.

[0047] When the flexible touch display panel 1 is not touched, after the processing module obtains the channel capacitance of the second touch electrode 11, it will first determine whether the channel capacitance is greater than the sleep threshold. The sleep threshold is the channel capacitance of the second touch electrode 11 obtained when the folding angle α is 0 or approximately 0. Since the smaller the folding angle α, the larger the channel capacitance, if the obtained channel capacitance is greater than the sleep threshold, it means that the folding angle α is 0, and the flexible touch display panel 1 can be controlled to enter the sleep state. If the obtained channel capacitance is less than the sleep threshold, it means that the folding angle α is greater than 0, and the capacitance range of the channel capacitance is further determined. After determining the capacitance range of the channel capacitance, the current folding angle α of the flexible touch display panel 1 is determined according to the correspondence between the pre-obtained channel capacitance range and the folding angle.

[0048] Furthermore, if Figure 4 As shown, Figure 4 This is a flow chart of another folding angle detection method provided by an embodiment of the present invention. The folding angle detection method provided by an embodiment of the present invention also includes:

[0049] S305: Controlling display parameters of the flexible touch display panel 1 according to the current folding angle, where the display parameters include brightness and color coordinates.

[0050] In other words, after pre-determining the correspondence between the channel capacitance and the folding angle α, the correspondence between the folding angle α and the display parameters must also be determined. This means that different brightness and color coordinates can be set for different folding angles α. For example, a smaller folding angle α results in lower brightness to save energy. After obtaining the current folding angle α of the flexible touch display panel 1, the processing module controls the parameters of the flexible touch display panel 1 to the corresponding display parameters based on the correspondence between the folding angle α and the display parameters.

[0051] Furthermore, after controlling the flexible touch display panel 1 to enter a dormant state, the folding angle detection method provided by an embodiment of the present invention further includes: inputting a second scanning signal to the touch electrodes, such as inputting a second scanning signal to the first touch electrodes 10, wherein the frequency of the second scanning signal is lower than the frequency of the first scanning signal. In other words, after the processing module controls the flexible touch display panel 1 to enter a dormant state, the driving module 12 controls the first touch electrodes 10 to perform a low-frequency scanning operation. This saves energy while enabling a quick response when the flexible touch display panel 1 is touched or folded.

[0052] In this embodiment, determining whether the channel capacity is greater than the sleep threshold includes:

[0053] It is determined whether the channel capacitance of some touch electrodes is greater than the sleep threshold.

[0054] Optionally, when the flexible touch display panel 1 in the embodiment of the present invention detects the folding angle α, the processing module can obtain the current folding angle α based on the channel capacitance of all the second touch electrodes 11. However, in order to reduce the workload of the processing module and reduce power consumption, the current folding angle α can also be obtained based on the channel capacitance of some of the second touch electrodes 11.

[0055] Optionally, some of the touch electrodes include touch electrodes located in the middle area between the non-bending areas A2 and A3, such as Figure 1 The second touch electrodes 11a and 11b shown, or part of the touch electrodes include touch electrodes located in the non-bending areas A2 and A3 near the bending area A1, as shown in FIG. Figure 1 The second touch electrodes 11c and 11d shown, or part of the touch electrodes include the touch electrodes located in the middle area of the non-bending areas A2 and A3 and the touch electrodes located in the area near the bending area A1 in the non-bending areas A2 and A3, as shown in FIG. Figure 1 Of course, the present invention is not limited to this. In other embodiments, part of the touch electrodes may also include touch electrodes in the bending area A1, such as Figure 1 The second touch electrode 11e is shown.

[0056] If the flexible touch display panel 1 has multiple bending areas, when the driving module 12 detects the sensing signal of the second touch electrode 11, that is, the channel capacitance, the processing module will determine the non-bending area or bending area to which it belongs based on the coordinates of the second touch electrode 11, and then obtain the folding angle of the non-bending area to which it belongs based on the channel capacitance of the second touch electrode 11, and then control the display state of the non-bending area to which it belongs based on the folding angle.

[0057] In another embodiment of the present invention, the touch electrodes in the flexible touch display panel 1 are self-capacitive touch electrodes, such as Figure 5 As shown, Figure 5 This is a schematic top view of another flexible touch display panel 1 provided by an embodiment of the present invention. A plurality of touch electrodes 40 are arranged in an array, and each touch electrode 40 is connected to a driving module 41 via a touch lead.

[0058] Similarly, the channel capacitance of the touch electrode 40 at different folding angles α is obtained in advance, that is, the correspondence between the folding angle α and the channel capacitance is obtained, and then the channel capacitance can be divided into multiple intervals. After obtaining the real-time channel capacitance, it is first compared with the channel capacitance interval threshold to obtain the channel capacitance interval in which it is located, and then the folding angle α corresponding to the real-time channel capacitance is determined based on the correspondence between the channel capacitance interval and the folding angle.

[0059] During the folding angle detection process of the flexible touch display panel 1, the driver module 41 continuously inputs a first scanning signal to the touch electrodes 40 and obtains the sensing signals output by the touch electrodes 40. When the flexible touch display panel 1 is touched, the driver module 41 determines the touch position based on the sensing signals output by the touch electrodes 40. When the flexible touch display panel 1 is not touched but the sensing signals output by the touch electrodes 40 change, the driver module 41 sends the sensing signals output by the touch electrodes 40 to the processing module, which determines the folding angle α based on the correspondence between the folding angle α and the channel capacitance range.

[0060] When the flexible touch display panel 1 is not touched, after the processing module obtains the channel capacitance of the touch electrode 40, it will first determine whether the channel capacitance is greater than the sleep threshold. The sleep threshold is the channel capacitance of the touch electrode 40 obtained when the folding angle α is 0 or approximately 0. Since the smaller the folding angle α, the larger the channel capacitance, if the obtained channel capacitance is greater than the sleep threshold, it means that the folding angle α is 0, and the flexible touch display panel 1 can be controlled to enter the sleep state. If the obtained channel capacitance is less than the sleep threshold, it means that the folding angle α is greater than 0, and the capacitance interval of the channel capacitance is further determined. After determining the capacitance interval of the channel capacitance, the current folding angle α of the flexible touch display panel 1 is determined according to the correspondence between the pre-obtained channel capacitance interval and the folding angle α.

[0061] Similarly, when the flexible touch display panel 1 in the embodiment of the present invention detects the folding angle α, the current folding angle α can be obtained based on the channel capacitance of all the touch electrodes 40. However, in order to reduce the workload of the processing module and reduce power consumption, the current folding angle α can also be obtained based on the channel capacitance of some touch electrodes 40.

[0062] Part of the touch electrodes include touch electrodes located in the middle area between the non-bending areas A2 and A3, such as Figure 5 The touch electrodes 40a and 40b shown, or part of the touch electrodes include touch electrodes located in the non-bending areas A2 and A3 near the bending area A1, as shown in FIG. Figure 5 The touch electrodes 40c and 40d shown, or part of the touch electrodes include the touch electrodes located in the middle area of the non-bending areas A2 and A3 and the touch electrodes located in the area near the bending area A1 in the non-bending areas A2 and A3, as shown in FIG. Figure 5 Of course, the present invention is not limited to this. In other embodiments, some of the touch electrodes may also include touch electrodes in the bending area A1, such as Figure 5 The touch electrode 40e is shown.

[0063] The folding angle detection method of the flexible touch display panel 1 provided in an embodiment of the present invention obtains the folding angle of the flexible touch display panel 1 through the sensing value of the touch electrode, i.e., the channel capacitance, and the correspondence between the channel capacitance interval and the folding angle. This not only improves the accuracy of folding angle detection, but also reduces the complexity and production cost of the flexible touch display panel 1.

[0064] The embodiment of the present invention further provides a folding angle detection system for a flexible touch display panel, which is applied to the folding angle detection method provided in any of the above embodiments, such as Figure 6 As shown, Figure 6 This is a structural diagram of a folding angle detection system for a flexible touch display panel 1 provided in an embodiment of the present invention. The folding angle detection system includes a driving module 50 and a processing module 51. It should be noted that the driving module 50 in this embodiment is both Figure 1 The driving module 12 shown is also Figure 5 The driving module 41 is shown.

[0065] Among them, the driving module 50 is used to input the first scanning signal to the touch electrode and obtain the channel capacitance of the touch electrode; the processing module 51 is used to determine whether the channel capacitance is greater than the sleep threshold. If so, control the flexible touch display panel to enter the sleep state; if not, determine the capacitance range of the sensing channel capacitance and determine the current folding angle of the flexible touch display panel based on the correspondence between the capacitance range and the folding angle.

[0066] by Figure 1 Taking the flexible touch display panel 1 shown as an example, during folding angle detection of the flexible touch display panel 1, the driver module 50 continuously inputs a first scanning signal to the first touch electrode 10 and obtains a sensing signal output by the second touch electrode 11. When the flexible touch display panel 1 is not touched but the sensing signal output by the second touch electrode 11 changes, the driver module 50 transmits the sensing signal output by the second touch electrode 11 to the processing module 51 of the flexible touch display panel 1, so that the processing module 51 determines the folding angle α based on the sensing signal, i.e., the channel capacitance.

[0067] After the processing module 51 obtains the channel capacitance of the second touch electrode 11, it will first determine whether the channel capacitance is greater than the sleep threshold. If the obtained channel capacitance is greater than the sleep threshold, it means that the folding angle α is 0, and the flexible touch display panel 1 can be controlled to enter the sleep state. If the obtained channel capacitance is less than the sleep threshold, it means that the folding angle α is greater than 0, and the capacitance range of the channel capacitance is further determined. After determining the capacitance range of the channel capacitance, the current folding angle α of the flexible touch display panel 1 is determined according to the correspondence between the pre-obtained channel capacitance range and the folding angle α.

[0068] Furthermore, after determining the current folding angle of the flexible touch display panel 1 , the processing module 51 is further configured to control display parameters of the flexible touch display panel 1 according to the current folding angle, where the display parameters include brightness and color coordinates.

[0069] In this embodiment, after controlling the flexible touch display panel 1 to enter the sleep state, the driving module 50 is further configured to input a second scanning signal to the touch electrodes, where the frequency of the second scanning signal is lower than the frequency of the first scanning signal.

[0070] Optionally, the processing module 51 determines whether to control the flexible touch display panel 1 to enter the sleep state by judging whether the channel capacitance of some touch electrodes is greater than a sleep threshold.

[0071] Part of the touch electrodes include touch electrodes located in the middle area of the non-bending area, such as Figure 1 The second touch electrodes 11a and 11b shown, or Figure 5 Alternatively, part of the touch electrodes include touch electrodes located in the non-bending area close to the bending area, such as Figure 1 The second touch electrodes 11c and 11d shown, or Figure 5 Alternatively, the touch electrodes include the touch electrodes located in the middle of the non-bending region and the touch electrodes located in the non-bending region near the bending region, as shown in FIG. Figure 1 The second touch electrodes 11a, 11b, 11c and 11d shown, or Figure 5 Touch electrodes 40a, 40b, 40c and 40d are shown.

[0072] Optionally, the driving module 50 is a driving chip of the flexible touch display panel 1 ; and the processing module 51 is a central processing unit of the flexible touch display panel 1 .

[0073] It should be noted that the driver chip in the embodiment of the present invention is a driver chip that integrates touch position detection and folding angle detection, but the present invention is not limited to this. In other embodiments, the touch electrodes can be connected to two driver chips respectively, one of which detects the touch position and the other detects the folding angle, so as to improve the detection efficiency of each driver chip.

[0074] Furthermore, the driver chip in the embodiment of the present invention also integrates the function of controlling the flexible touch display panel 1 to display the screen, that is, providing output signals to the pixels in the flexible touch display panel 1 via data lines, and providing scanning signals to the pixels in the flexible touch display panel 1 via gate lines. However, the present invention is not limited to this. In other embodiments, the flexible touch display panel 1 can also control the screen display through another driver chip. It should be noted that no matter how many driver chips the flexible touch display panel 1 has, the driver chips can communicate with each other to achieve unified management of display, touch, and folding.

[0075] The folding angle detection system for a flexible touch display panel provided by an embodiment of the present invention obtains the folding angle of the flexible touch display panel through the sensing value of the touch electrode, i.e., the channel capacitance, and the correspondence between the channel capacitance range and the folding angle. This not only improves the accuracy of folding angle detection, but also reduces the complexity and production cost of the flexible touch display panel.

[0076] An embodiment of the present invention further provides a flexible touch display panel, including a folding angle detection system according to any of the above embodiments. The flexible touch display panel is a flexible touch display panel integrated with a touch electrode layer. Optionally, the touch electrode layer is embedded within the flexible touch display panel. Furthermore, the flexible touch display panel includes an organic light-emitting flexible touch display panel, etc. The flexible touch display panel provided by the embodiment of the present invention has high accuracy in folding angle detection and low complexity and manufacturing cost.

[0077] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0078] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one 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 invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for detecting the folding angle of a flexible touch display panel, wherein the flexible touch display panel comprises at least one bending region and non-bending regions located on both sides of the bending region, wherein both the bending region and the non-bending region have touch electrodes, wherein: include: inputting a first scanning signal to the touch electrode and acquiring a channel capacitance of the touch electrode; Determining whether the channel capacity is greater than a sleep threshold; If yes, controlling the flexible touch display panel to enter a dormant state, inputting a second scanning signal to the touch electrode, wherein the frequency of the second scanning signal is lower than the frequency of the first scanning signal; If not, determining a capacitance interval within which the channel capacitance lies, and determining a current folding angle of the flexible touch display panel based on a correspondence between the capacitance interval and the folding angle, and controlling display parameters of the flexible touch display panel based on the current folding angle, the display parameters including brightness and color coordinates; The channel capacitance is a sensing signal output by the touch electrode; when the flexible touch display panel is not touched but the sensing signal output by the touch electrode changes, the folding angle is determined according to a corresponding relationship between the folding angle and the channel capacitance interval; The touch electrode includes a first touch electrode and a second touch electrode; a plurality of the first touch electrodes are arranged in sequence along a first direction; a plurality of the second touch electrodes are arranged in sequence along a second direction; the first direction is perpendicular to the second direction; a first scanning signal is input to the touch electrode, and the channel capacitance of the touch electrode is obtained, including: inputting a first scanning signal to the first touch electrode, and obtaining the channel capacitance of the second touch electrode.

2. The method according to claim 1, characterized in that Determining whether the channel capacity is greater than a sleep threshold includes: It is determined whether the channel capacitance of some of the touch electrodes is greater than a sleep threshold.

3. The method according to claim 2, characterized in that The part of the touch electrodes includes touch electrodes located in the middle area of the non-bending area; Alternatively, the part of the touch electrodes includes touch electrodes located in a region of the non-bending region close to the bending region; Alternatively, the portion of touch electrodes includes touch electrodes located in a middle area of the non-bending area and touch electrodes located in an area of the non-bending area close to the bending area.

4. The method according to claim 1, wherein In the flexible touch display panel, a plurality of touch electrodes are arranged in an array.

5. A folding angle detection system for a flexible touch display panel, applied to the folding angle detection method according to any one of claims 1 to 4, characterized in that: Includes a driving module and a processing module; The driving module is used to input a first scanning signal to the touch electrode and obtain a channel capacitance of the touch electrode; The processing module is configured to determine whether the channel capacitance is greater than a sleep threshold; if so, control the flexible touch display panel to enter a sleep state; if not, determine a capacitance interval within which the channel capacitance lies, and determine a current folding angle of the flexible touch display panel based on a correspondence between the capacitance interval and a folding angle; and control display parameters of the flexible touch display panel based on the current folding angle, the display parameters including brightness and color coordinates; After controlling the flexible touch display panel to enter a dormant state, the driving module is further configured to input a second scanning signal to the touch electrode, wherein the frequency of the second scanning signal is lower than the frequency of the first scanning signal; The channel capacitance is a sensing signal output by the touch electrode; when the flexible touch display panel is not touched but the sensing signal output by the touch electrode changes, the folding angle is determined according to a corresponding relationship between the folding angle and the channel capacitance interval; The touch electrode includes a first touch electrode and a second touch electrode; a plurality of the first touch electrodes are arranged in sequence along a first direction; a plurality of the second touch electrodes are arranged in sequence along a second direction; the first direction is perpendicular to the second direction; a first scanning signal is input to the touch electrode, and the channel capacitance of the touch electrode is obtained, including: inputting a first scanning signal to the first touch electrode, and obtaining the channel capacitance of the second touch electrode.

6. The system according to claim 5, characterized in that The processing module determines whether to control the flexible touch display panel to enter a sleep state by determining whether the channel capacitance of some of the touch electrodes is greater than a sleep threshold.

7. The system according to claim 6, characterized in that The part of the touch electrodes includes touch electrodes located in the middle area of the non-bending area; Alternatively, the part of the touch electrodes includes touch electrodes located in a region of the non-bending region close to the bending region; Alternatively, the portion of touch electrodes includes touch electrodes located in a middle area of the non-bending area and touch electrodes located in an area of the non-bending area close to the bending area.

8. The system according to claim 5, wherein: The driving module is a driving chip of the flexible touch display panel; The processing module is the central processing unit of the flexible touch display panel.

9. A flexible touch display panel, characterized in that: Including the folding angle detection system according to any one of claims 5 to 8.

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