Foldable touch display module and device, method and device for determining folding angle

Abstract

This application discloses a foldable touch display module and device, and a method and device for determining the folding angle, relating to the field of touch displays. The foldable touch display module includes a display substrate, a touch substrate, and a driving chip. The driving chip can determine the touch position based on the change in capacitance sensing information between a first touch electrode and a second touch electrode, and is used to determine the folding angle between the first substrate portion and the second substrate portion of the display substrate based on the change in capacitance sensing information between the first folding angle electrode and the second folding angle electrode. That is, the electrode used to determine the folding angle in the foldable touch display module is independent of the electrode used to implement the touch function, thereby avoiding interference from touch signals, accidental touches, or water droplets during folding angle detection, and ensuring the accuracy and reliability of folding angle detection.

Description

Technical Field

[0001] This application relates to the field of touch display technology, and in particular to a foldable touch display module and device, and a method and device for determining the folding angle. Background Technology

[0002] The touch display module includes a display substrate, a touch substrate located on the display substrate, and a drive detection circuit electrically connected to the touch substrate. The drive detection circuit provides a drive signal to the touch sensor in the touch substrate. When a user's finger approaches the touch electrode structure, the drive detection circuit can detect a change in the capacitive sensing signal of the touch substrate at the location of the user's finger, based on the touch sensor's detection of this change, and can determine the location of the change in the sensing signal as the touch position.

[0003] In related technologies, when a touch display module is folded, in order to determine the folding angle of the touch display module, the drive detection circuit also needs to determine the folding angle based on the change in capacitance of the touch sensor during folding.

[0004] However, the above method of determining the folding angle is by reusing the touch sensor. Therefore, the touch sensor is easily affected by factors such as finger touch signals, accidental touches, and water droplets, which leads to poor accuracy in folding angle detection. Summary of the Invention

[0005] This application provides a foldable touch display module and device, and a method and device for determining the folding angle, which can solve the problem of poor accuracy in folding angle detection. The technical solution is as follows:

[0006] On one hand, a foldable touch display module is provided, the foldable touch display module comprising:

[0007] The display substrate includes a first substrate portion and a second substrate portion. The first substrate portion includes a first sub-display area and a first sub-peripheral area. The second substrate portion includes a second sub-display area and a second sub-peripheral area. The first sub-display area and the second sub-display area constitute the display area of ​​the display substrate. The first sub-peripheral area and the second sub-peripheral area constitute the peripheral area of ​​the display substrate. The peripheral area surrounds the display area.

[0008] A touch substrate includes a first touch electrode, a second touch electrode, a first folded corner electrode, and a second folded corner electrode. The orthographic projections of the first touch electrode and the second touch electrode on the display substrate are both located in the display area. The first touch electrode and the second touch electrode are insulated from each other. The orthographic projection of the first folded corner electrode on the display substrate is located in a first sub-peripheral region, and the orthographic projection of the second folded corner electrode on the display substrate is located in a second sub-peripheral region. The first folded corner electrode and the second folded corner electrode are symmetrically arranged with respect to the boundary line between the first substrate portion and the second substrate portion.

[0009] The display substrate includes a driver chip whose orthographic projection on the display substrate is located in the peripheral area. The driver chip is electrically connected to the first touch electrode, the second touch electrode, the first folded corner electrode, and the second folded corner electrode. The driver chip is used to determine the touch position based on the change in capacitance sensing information between the first touch electrode and the second touch electrode, and to determine the folding angle of the first substrate portion and the second substrate portion based on the capacitance value between the first folded corner electrode and the second folded corner electrode.

[0010] Optionally, the foldable touch display module includes: a first touch signal line, a second touch signal line, a first folding angle signal line, and a second folding angle signal line;

[0011] One end of the first touch signal line is connected to the first touch electrode, and the other end is connected to the driver chip;

[0012] One end of the second touch signal line is connected to the second touch electrode, and the other end is connected to the driver chip;

[0013] One end of the first folded angle signal line is connected to the first folded angle electrode, and the other end is connected to the driver chip;

[0014] One end of the second folded angle signal line is connected to the second folded angle electrode, and the other end is connected to the driver chip.

[0015] Optionally, the foldable touch display module includes: a first isolation signal line and a second isolation signal line located in the peripheral area;

[0016] The first isolation signal line is closer to the display area than the second isolation signal line. Both the first isolation signal line and the second isolation signal line extend along a first direction, which is the arrangement direction of the first substrate portion and the second substrate portion.

[0017] The first isolation signal line is connected to the driver chip, while the second isolation signal line is not connected to the driver chip.

[0018] Optionally, the foldable touch display module includes: multiple first isolation signal lines and multiple second isolation signal lines;

[0019] The plurality of first isolation signal lines and the plurality of second isolation signal lines are all located on the side of the first folded corner electrode and the second folded corner electrode closer to the display area;

[0020] or,

[0021] Of the plurality of first isolation signal lines, the first type of first isolation signal line is located on the side of the first folded corner electrode and the second folded corner electrode closer to the display area, and the second type of first isolation signal line is located on the side of the first folded corner electrode and the second folded corner electrode farther from the display area; of the plurality of second isolation signal lines, the first type of second isolation signal line is located on the side of the first folded corner electrode and the second folded corner electrode closer to the display area, and the second type of second isolation signal line is located on the side of the first folded corner electrode and the second folded corner electrode farther from the display area; the first type of first isolation signal line is closer to the display area than the first type of second isolation signal line, and the second type of first isolation signal line is closer to the display area than the second type of second isolation signal line.

[0022] Optionally, the first folded angle electrode includes: a first sub-folded angle electrode and a second sub-folded angle electrode, and the second folded angle electrode includes: a third sub-folded angle electrode and a fourth sub-folded angle electrode;

[0023] The first sub-folded corner electrode and the third sub-folded corner electrode are symmetrically arranged with respect to the boundary line between the first substrate portion and the second substrate portion. The orthographic projection of the first sub-folded corner electrode on the display substrate is located at the corner of the first sub-peripheral region, and the orthographic projection of the third sub-folded corner electrode on the display substrate is located at the corner of the second sub-peripheral region.

[0024] The second sub-folded corner electrode and the fourth sub-folded corner electrode are symmetrically arranged with respect to the boundary line between the first substrate portion and the second substrate portion. The orthographic projection of the second sub-folded corner electrode on the display substrate is located at a position other than the corner in the first sub-peripheral region, and the orthographic projection of the fourth sub-folded corner electrode on the display substrate is located at a position other than the corner in the second sub-peripheral region.

[0025] Optionally, the first sub-peripheral region includes a first region portion extending along a first direction and a second region portion extending along a second direction, and the second sub-peripheral region includes a third region portion extending along the first direction and a fourth region portion extending along the second direction, wherein the first direction is the arrangement direction of the first substrate portion and the second substrate portion, and the second direction is perpendicular to the first direction.

[0026] For any one of the first sub-folded angle electrode and the third sub-folded angle electrode, the electrode includes a first electrode portion and a second electrode portion, both of which are strip-shaped electrodes;

[0027] The orthographic projection of the first electrode portion of the first sub-folded corner electrode on the display substrate is located in the first region portion; the orthographic projection of the second electrode portion of the first sub-folded corner electrode on the display substrate is located in the second region portion; the orthographic projection of the first electrode portion of the third sub-folded corner electrode on the display substrate is located in the third region portion; and the orthographic projection of the first electrode portion of the third sub-folded corner electrode on the display substrate is located in the fourth region portion.

[0028] Optionally, any of the electrodes may further include a third electrode portion, which is an arc-shaped electrode;

[0029] One end of the third electrode portion is connected to the first electrode portion, and the other end is connected to the second electrode portion.

[0030] Optionally, both the second sub-folded electrode and the fourth sub-folded electrode are strip-shaped electrodes. The orthographic projection of the second sub-folded electrode on the display substrate is located in the first region, and the orthographic projection of the fourth sub-folded electrode on the display substrate is located in the third region.

[0031] Optionally, the touch substrate includes: a first touch layer, a touch insulating layer, and a second touch layer, which are sequentially stacked in a direction away from the display substrate;

[0032] The first folded corner electrode and the second folded corner electrode are located in the first touch layer or the second touch layer, and the first folded corner electrode and the second folded corner electrode are located in the same layer.

[0033] Optionally, the first folded corner signal line connected to the first folded corner electrode is located in the same layer as the first folded corner electrode, or the first folded corner signal line connected to the first folded corner electrode is located in the first touch layer and the other is located in the second touch layer; when the first folded corner signal line and the first folded corner electrode are located in the first touch layer and the other is located in the second touch layer, the first folded corner signal line and the first folded corner electrode are connected through a via in the touch insulating layer;

[0034] The second folded angle signal line connected to the second folded angle electrode is located on the same layer as the second folded angle electrode, or the second folded angle signal line connected to the second folded angle electrode is located on the first touch layer and the other is located on the second touch layer; when the second folded angle signal line and the second folded angle electrode are located on the first touch layer and the other is located on the second touch layer, the second folded angle signal line and the second folded angle electrode are connected through a via in the touch insulating layer.

[0035] Optionally, the touch substrate includes: four first folded corner electrodes and four second folded corner electrodes;

[0036] The four first folded corner electrodes and the four second folded corner electrodes correspond one-to-one. The orthographic projection of each first folded corner electrode on the display substrate and the corresponding second folded corner electrode are symmetrically arranged with respect to the boundary line between the first substrate portion and the second substrate portion.

[0037] On the other hand, a foldable touch display device is provided, the foldable touch display device comprising: a power supply component and a foldable touch display module as described above;

[0038] The power supply component is connected to the foldable touch display module, and the power supply component is used to supply power to the foldable touch display module.

[0039] In another aspect, a method for determining a folding angle is provided, the method being used to determine the folding angle between a first substrate portion and a second substrate portion in the foldable touch display module described above; the method includes:

[0040] Repeat steps 1 to 2 in a loop;

[0041] Step 1: The driving chip in the foldable touch display module provides a touch detection signal to the first touch electrode in the touch substrate at the first moment. When the touch detection signal passes through the first touch electrode, the first touch electrode 1021 will generate a coupling capacitance with the second touch electrode in the touch substrate. The driving chip determines the touch position based on the change in capacitance sensing information between the second touch electrode and the first touch electrode.

[0042] Step 2: After the first time period, the driving chip provides a folding angle detection signal to the first folding angle electrode in the touch substrate at the second time period. Under the action of the folding angle signal, the second folding angle electrode in the touch substrate generates a coupling capacitance with the first folding angle electrode. The driving chip determines the folding angle based on the capacitance value between the second folding angle electrode and the first folding angle electrode, and then the second time period is passed again.

[0043] In another aspect, a folding angle determination device is provided, the device including a memory and a processor, the memory for storing computer programs or code, and the processor for executing the computer programs or code to implement the folding angle determination method as described above.

[0044] In another aspect, a computer-readable storage medium is provided, the computer-readable storage medium including instructions or code that, when executed on a computer, cause the computer to perform the folding angle determination method as described above.

[0045] The beneficial effects of the technical solution provided in this application include at least the following:

[0046] This application provides a foldable touch display module and device, and a method and device for determining the folding angle. The foldable touch display module includes a display substrate, a touch substrate, and a driver chip. The driver chip can determine the touch position based on the change in capacitance sensing information between a first touch electrode and a second touch electrode, and is used to determine the folding angle between the first substrate portion and the second substrate portion of the display substrate based on the change in capacitance sensing information between the first folding angle electrode and the second folding angle electrode. That is, the electrode used to determine the folding angle in the foldable touch display module is independent of the electrode used to implement the touch function, thereby avoiding interference from touch signals, accidental touches, or water droplets during folding angle detection, and ensuring the accuracy and reliability of folding angle detection. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 This is a top view of a foldable touch display module provided in an embodiment of this application;

[0049] Figure 2 This is a schematic diagram of a foldable touch display module in a flattened state, as provided in an embodiment of this application.

[0050] Figure 3 This is a schematic diagram of a foldable touch display module gradually folding from a flattened state, according to an embodiment of this application.

[0051] Figure 4 This is a schematic diagram of a foldable touch display module in a fully folded state, as provided in an embodiment of this application.

[0052] Figure 5 This is a cross-sectional schematic diagram of a foldable touch display module provided in an embodiment of this application;

[0053] Figure 6 This is a top view of another foldable touch display module provided in the embodiments of this application;

[0054] Figure 7 This is a top view of another foldable touch display module provided in the embodiments of this application;

[0055] Figure 8 This is a schematic diagram of a capacitor in a flattened state for a foldable touch display module provided in an embodiment of this application;

[0056] Figure 9 This is a schematic diagram of a foldable touch display module in a semi-folded state, which is between a flattened state and a fully folded state, according to an embodiment of this application.

[0057] Figure 10 This is a schematic diagram of a foldable touch display module in a fully folded state, as provided in an embodiment of this application.

[0058] Figure 11 This is a top view of another foldable touch display module provided in the embodiments of this application;

[0059] Figure 12 This is a top view of another foldable touch display module provided in the embodiments of this application;

[0060] Figure 13This is a schematic diagram of a folded angle electrode provided in an embodiment of this application;

[0061] Figure 14 This is a schematic diagram of another folded angle electrode provided in an embodiment of this application;

[0062] Figure 15 This is a cross-sectional schematic diagram of another foldable touch display module provided in an embodiment of this application;

[0063] Figure 16 This is a cross-sectional schematic diagram of another foldable touch display module provided in the embodiments of this application;

[0064] Figure 17 This is a schematic diagram of a foldable touch display device provided in an embodiment of this application;

[0065] Figure 18 This is a flowchart of a method for determining a folding angle provided in an embodiment of this application;

[0066] Figure 19 This is a signal timing diagram of a first folded angular electrode and a second folded angular electrode provided in an embodiment of this application. Detailed Implementation

[0067] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0068] Figure 1 This is a top view of a foldable touch display module provided in an embodiment of this application. (Reference) Figure 1 The foldable touch display module 100 includes: a display substrate 101, a touch substrate 102, and a driver chip 103.

[0069] The display substrate 101 can be used to realize a display. The display substrate 101 includes a first substrate portion 1011 and a second substrate portion 1012. The first substrate portion 1011 includes a first sub-display area 1011a and a first sub-peripheral area 1011b. The second substrate portion 1012 includes a second sub-display area 1012a and a second sub-peripheral area 1012b. The first sub-display area 1011a and the second sub-display area 1012a constitute the display area 101a of the display substrate 101. The first sub-peripheral area 1011b and the second sub-peripheral area 1012b constitute the peripheral area 101b of the display substrate 101. The peripheral area 101b surrounds the display area 101a. Optionally, the display substrate 101 can be a foldable display substrate, for example, the folding angle between the first substrate portion 1011 and the second substrate portion 1012 can be any angle from 0 degrees to 180 degrees.

[0070] refer to Figure 2When the folding angle between the first substrate portion 1011 and the second substrate portion 1012 is 180 degrees, the display substrate 101 can be in a flattened state. (Reference) Figure 3 When the folding angle between the first substrate portion 1011 and the second substrate portion 1012 is greater than 0 degrees and less than 180 degrees, the display substrate 101 can be in a semi-folded state. (Reference) Figure 4 When the folding angle between the first substrate portion 1011 and the second substrate portion 1012 is 0 degrees, the display substrate 101 can be in a fully folded state.

[0071] The touch substrate 102 may include a first touch electrode 1021, a second touch electrode 1022, a first folded corner electrode 1023, and a second folded corner electrode 1024. The orthographic projections of the first touch electrode 1021 and the second touch electrode 1022 onto the display substrate 101 are both located in the display area 101a. The first touch electrode 1021 and the second touch electrode 1022 are insulated from each other. Optionally, one of the first touch electrodes 1021 and the second touch electrode 1022 may be a touch emitter (TX) electrode and the other a touch sensor (RX) electrode. The orthographic projection of the first folded corner electrode 1023 onto the display substrate 101 is located in a first sub-peripheral region 1011b, and the orthographic projection of the second folded corner electrode 1024 onto the display substrate 101 is located in a second sub-peripheral region 1012b. The first folded corner electrode 1023 and the second folded corner electrode 1024 are symmetrically arranged with respect to the boundary line m between the first substrate portion 1011 and the second substrate portion 1012. Optionally, one of the first folded angle electrodes 1023 and the second folded angle electrode 1024 may be a folded angle emission (TX) electrode and the other may be a folded angle sensing (RX) electrode.

[0072] The orthographic projection of the driver chip 103 onto the display substrate 101 is located in the peripheral region 101b. Furthermore, the driver chip 103 can be electrically connected to the first touch electrode 1021, the second touch electrode 1022, the first folded corner electrode 1023, and the second folded corner electrode 1024. The driver chip 103 can be used to determine the touch position based on the change in capacitance sensing information between the first touch electrode 1021 and the second touch electrode 1022, and to determine the folding angle between the first substrate portion 1011 and the second substrate portion 1012 based on the capacitance value between the first folded corner electrode 1023 and the second folded corner electrode 1024.

[0073] In this embodiment, the first touch electrode 1021 and the second touch electrode 1022 can be used to implement the touch function of the foldable touch display module 100, that is, to detect the user's touch position. The first folding angle electrode 1023 and the second folding angle electrode 1024 can be used to detect the folding angle of the foldable touch display module 100. Furthermore, since the first folding angle electrode 1023 and the second folding angle electrode 1024 are disposed in the peripheral area 101b, while the first touch electrode 1021 and the second touch electrode 1022 are disposed in the display area 101a, signal interference between the electrode used to determine the folding angle and the electrode used to implement the touch function can be avoided. At the same time, the need for a larger touch electrode in the display area 101a due to the need for the touch function electrode to determine the folding angle can be avoided, thus preventing an impact on the display effect. In other words, in this embodiment, the electrode used to determine the folding angle is independent of the electrode used to implement the touch function. Furthermore, it can avoid interference from touch signals, accidental touches, or water droplets during folding angle detection, thus ensuring the accuracy and reliability of folding angle detection.

[0074] In summary, this application provides a foldable touch display module, which includes a display substrate, a touch substrate, and a driving chip. The driving chip can determine the touch position based on the change in capacitance sensing information between the first touch electrode and the second touch electrode, and is used to determine the folding angle between the first substrate portion and the second substrate portion of the display substrate based on the change in capacitance sensing information between the first folding angle electrode and the second folding angle electrode. That is, the electrode used to determine the folding angle in the foldable touch display module is independent of the electrode used to implement the touch function, thereby avoiding interference from touch signals, accidental touches, or water droplets during folding angle detection, and ensuring the accuracy and reliability of folding angle detection.

[0075] Figure 5 This is a partial cross-sectional schematic diagram of a touch substrate provided in an embodiment of this application. (Reference) Figure 5 The touch substrate 102 includes: a first touch layer a1, a touch insulating layer a2, and a second touch layer a3 stacked in a direction away from the display substrate 101. (See reference) Figure 5 The touch substrate 102 further includes a touch buffer layer a4 located on the side of the first touch layer a1 near the display substrate 101. The touch insulating layer a2 can be used to insulate the first touch layer a1 and the second touch layer a3. The touch buffer layer a4 facilitates the fabrication of the first touch layer a1, the touch insulating layer a2, and the second touch layer a3. The materials of the touch insulating layer a2 and the touch buffer layer a4 can be inorganic materials, such as one or more inorganic oxides like SiNx (silicon nitride), SiOx (silicon oxide), and SiOxNy (silicon oxynitride).

[0076] Optionally, the first touch layer a1 can also be referred to as the first touch metal layer (Touch metal layer A, TMA) of the foldable touch display module 100, and the second touch layer a3 can also be referred to as the second touch metal layer (Touch metal layer B, TMB) of the foldable touch display module.

[0077] Both the first touch layer a1 and the second touch layer a3 include touch electrode lines. These touch electrode lines can form the first touch electrode 1021 and the second touch electrode 1022. That is, the first touch electrode 1021 and the second touch electrode 1022 can be a grid-like electrode formed by the touch electrode lines.

[0078] For example, the first touch electrode 1021 includes a main electrode 10211 and a bridging electrode 10212. Combined Figure 1 and Figure 5 One of the touch electrode layers in the first touch layer a1 and the second touch layer a3 ( Figure 5 Taking the first touch layer a1 as an example, it includes a bridging electrode 10212 of multiple first touch electrodes 1021, and another touch electrode layer in the first touch layer a1 and the second touch layer a3 ( Figure 5 Taking the second touch layer a3 as an example, it includes a main electrode 10211 of a plurality of first touch electrodes 1021 and a plurality of second touch electrodes 1022. The portion of the touch insulating layer a2 located in the display area 101a includes a plurality of vias G, and the bridging electrode 10212 and the main electrode 10211 are electrically connected through the vias G in the touch insulating layer a2. Figure 5 The diagram illustrates a portion of the structure of the first touch electrode 1021 and the second touch electrode 1022, using only the film layers and their connections.

[0079] For example, the bridging electrode 10212 of the first touch electrode 1021 is located in the first touch layer a1, the main electrode 10211 of the first touch electrode 1021, and the second touch electrode 1022 may be located in the second touch layer a3.

[0080] refer to Figure 1 The touch substrate 102 includes a plurality of first touch electrodes 1021 arranged along a first direction X, and a plurality of second touch electrodes 1022 arranged along a second direction Y. Furthermore, the orthographic projections of the bridging electrodes 10212 of the first touch electrodes 1021 on the display substrate 101 and the orthographic projections of the second touch electrodes 1022 on the display substrate 101 partially overlap.

[0081] Optional, see reference Figure 6The target area in the second sub-peripheral area 1012b, away from the first sub-peripheral area 1011b, may include a bending area 1012bm1 and a bonding area 1012bm2 arranged sequentially in a direction away from the display area 101a. The foldable touch display module 100 may also include multiple touch interfaces (not shown in the figure) located in the bonding area 1012bm2. The driver chip 103 can be connected to signal lines (first touch signal line 1025, second touch signal line 1026, first folding angle signal line 1027, and second folding angle signal line 1028) through the touch interfaces. The touch interfaces can be used to receive signals from the driver chip 103.

[0082] Optionally, the driver chip 103 can be integrated onto the flexible circuit board B, which can be connected to a touch interface. The touch interface is used to bond the flexible circuit board to the display substrate 101. Furthermore, after bonding, the display substrate 101 can be bent along the bending area 1012bm1 to bend the flexible circuit board B to the non-display side of the display substrate 101, thereby reducing the bezel size.

[0083] In this embodiment, the first folded corner electrode 1023 can be located in either the first touch layer a1 or the second touch layer a3. The second folded corner electrode 1024 can be located in either the first touch layer a1 or the second touch layer a3. The first folded corner electrode 1023 and the second folded corner electrode 1024 can be located in the same layer.

[0084] Optionally, since the first folded corner electrode 1023 and the second folded corner electrode 1024 are located in the peripheral area 101b, they will not affect the normal display of the display area 101a. Furthermore, in order to increase the capacitance value between the first folded corner electrode 1023 and the second folded corner electrode 1024, thereby reducing the difficulty of determining the folding angle, the first folded corner electrode 1023 and the second folded corner electrode 1024 can be block electrodes, rather than grid electrodes.

[0085] refer to Figure 7 The touch substrate 102 includes: a first touch signal line 1025, a second touch signal line 1026, a first folding angle signal line 1027, and a second folding angle signal line 1028. Figure 7Different thicknesses and linearities are used to represent different signal lines, but do not represent the actual structure and thickness of the signal lines. One end of the first touch signal line 1025 is connected to the first touch electrode 1021, and the other end is connected to the driver chip 103. One end of the second touch signal line 1026 is connected to the second touch electrode 1022, and the other end is connected to the driver chip 103. One end of the first folding angle signal line 1027 is connected to the first folding angle electrode 1023, and the other end is connected to the driver chip 103. One end of the second folding angle signal line 1028 is connected to the second folding angle electrode 1024, and the other end is connected to the driver chip 103.

[0086] Optionally, the driver chip 103 can provide a touch detection signal to the first touch electrode 1021 via the first touch signal line 1025. When the touch detection signal passes through the first touch electrode 1021, the first touch electrode 1021 will generate a coupling capacitance with the second touch electrode 1022. When the user's finger touches the foldable touch display module 100, the capacitance at the touched position will change, i.e., there will be a change in capacitance sensing information. The driver chip 103 can determine the touched position based on the change in capacitance sensing information between the first touch electrode 1021 and the second touch electrode 1022.

[0087] Optionally, the driver chip 103 can provide a folding angle detection signal to the first folding angle electrode 1023 via the first folding angle signal line 1027. The second folding angle electrode 1024 can generate a coupling capacitance with the first folding angle electrode 1023 under the action of the folding angle detection signal. The driver chip 103 can store a correspondence between folding angles and the capacitance values ​​of a reference capacitor. The capacitance value of the reference capacitor can be the capacitance value of a standard capacitor between the first folding angle electrode 1023 and the second folding angle electrode 1024 when the folding angle is known. This reference capacitance value can be obtained through sample sampling. When the foldable touch display module 100 is at different folding angles, the coupling capacitance between the second folding angle 1024 and the first folding angle 1023 is different, thus allowing the driver chip 103 to detect different capacitance values. The driver chip 103 can determine the folding angle corresponding to the capacitance value from the stored correspondence based on the capacitance value detected by the driver chip 103. This allows the display control component (which can be electrically connected to the driver chip) in the foldable touch display device to have more possibilities for the application products in the foldable touch display module 100, such as automatically adjusting the display layout and optimizing the display content.

[0088] In this embodiment, the touch substrate 102 may include a plurality of first folded corner electrodes 1023 and a plurality of second folded corner electrodes 1024. The plurality of first folded corner electrodes 1023 and the plurality of second folded corner electrodes 1024 correspond one-to-one. When the foldable touch display module 100 is at different folding angles, the capacitance between each first folded corner electrode 1023 and its corresponding second folded corner electrode 1024 is different. Therefore, the capacitance value of the reference capacitor in the correspondence stored in the driver chip 103 may include the capacitance value of each of the plurality of first folded corner electrodes 1023 and its corresponding second folded corner electrode 1024.

[0089] refer to Figure 1 , Figure 6 and Figure 7 The touch substrate 102 may include four first folded corner electrodes 1023 and four second folded corner electrodes 1024. The four first folded corner electrodes 1023 and four second folded corner electrodes 1024 correspond one-to-one. The orthographic projection of each first folded corner electrode 1023 onto the display substrate 101 and the corresponding second folded corner electrode 1024 are symmetrically arranged with respect to the boundary line m between the first substrate portion 1011 and the second substrate portion 1012. In this case, the reference capacitor in the correspondence stored in the driver chip 103 may include: a reference capacitor between the first first folded corner electrode 1023a and the first second folded corner electrode 1024a; a reference capacitor between the second first folded corner electrode 1023b and the second second folded corner electrode 1024b; a reference capacitor between the third first folded corner electrode 1023c and the third second folded corner electrode 1024c; and a reference capacitor between the fourth first folded corner electrode 1023d and the fourth second folded corner electrode 1024d.

[0090] Alternatively, the touch substrate 102 may include other numbers of first folded corner electrodes 1023 and other numbers of second folded corner electrodes 1024, as long as the first folded corner electrodes 1023 and the second folded corner electrodes 1024 are correspondingly arranged. In this embodiment, the number of first folded corner electrodes 1023 and second folded corner electrodes 1024 can be determined according to the actual size of the display substrate 101.

[0091] Optionally, the number of the first folded corner electrodes 1023 and the second folded corner electrodes 1024 can be positively correlated with the size of the display substrate 101. That is, the larger the size of the display substrate 101, the more first folded corner electrodes 1023 and the second folded corner electrodes 1024 there are; the smaller the size of the display substrate 101, the fewer first folded corner electrodes 1023 and the second folded corner electrodes 1024 there are.

[0092] Generally, the more first folded corner electrodes 1023 and second folded corner electrodes 1024 there are, the more sets of capacitance values ​​between the first folded corner electrodes 1023 and second folded corner electrodes 1024 can be obtained by the driver chip 103. This allows the driver chip 103 to compare more sets of capacitance values ​​with their corresponding relationships, thus eliminating cases where capacitance values ​​change due to non-folded angle changes (such as stains or conductor pressure), reducing the false detection rate of folded angles. Therefore, where design allows, a greater number of first folded corner electrodes 1023 and second folded corner electrodes 1024 can significantly improve the accuracy of the determined folded angle.

[0093] In the wearable touch display module, the capacitance C between the first folded corner electrode 1023 and the second folded corner electrode 1024 can be calculated using the following formula (1):

[0094]

[0095] In the above formula (1), ε is the dielectric constant of the dielectric material, A is the overlapping area of ​​the orthographic projection of the first folded corner electrode 1023 on the reference plane and the orthographic projection of the second folded corner electrode 1024 on the reference plane, and d is the average distance between the first folded corner electrode 1023 and the second folded corner electrode 1024. The reference plane can be a surface that passes through the boundary line m between the first substrate portion 1011 and the second substrate portion 1012 and bisects the folded angle. The average distance d of any folded corner electrode among the first folded corner electrode 1023 and the second folded corner electrode 1024 can satisfy: (d1+d2) / 2. Wherein, d1 is the distance between the side of the folded corner electrode closer to the boundary line m and the boundary line m, and d2 is the distance between the side of the folded corner electrode away from the boundary line m and the boundary line m.

[0096] refer to Figure 8 When the folding angle between the first substrate portion 1011 and the second substrate portion 1012 is 180 degrees (flattened state), the overlapping area of ​​the orthographic projection of the first folded corner electrode 1023 on the reference plane C and the orthographic projection of the second folded corner electrode 1024 on the reference plane is minimized, and thus the capacitance value between the first folded corner electrode 1023 and the second folded corner electrode 1024 is minimized.

[0097] refer to Figure 9As the foldable touch display module 100 gradually folds from its flattened state, the first folding angle electrode 1023 and the second folding angle electrode 1024, which were originally on the same plane, gradually move closer together, and the first folding angle electrode 1023 and the corresponding second folding angle electrode 1024 remain symmetrical with respect to the boundary line m. Furthermore, as the folding angle gradually decreases, the overlapping area of ​​the orthographic projection of the first folding angle electrode 1023 onto the reference plane C and the orthographic projection of the second folding angle electrode 1024 onto the reference plane gradually increases, thereby gradually increasing the capacitance value between the first folding angle electrode 1023 and the corresponding second folding angle electrode 1024, and the foldable touch display module 100 is in a semi-folded state. (Reference) Figure 10 When the foldable touch display module 100 is in a fully folded state, the capacitance between the first folded corner electrode 1023 and the corresponding second folded corner electrode 1024 is at its maximum.

[0098] for example Figures 8 to 10 The diagram illustrates the capacitance Cm1 between the first first folded corner electrode 1023a and the first second folded corner electrode 1024a, and the capacitance Cm3 between the third first folded corner electrode 1023c and the third second folded corner electrode 1024c. During the gradual folding of the foldable touch display module 100, the values ​​of both capacitance Cm1 and capacitance Cm3 reflect the folding angle of the foldable touch display module. The difference lies in the magnitude and the amount of change of the values ​​of capacitance Cm1 and capacitance Cm3.

[0099] refer to Figure 11 The foldable touch display module 100 includes a first isolation signal line 104 and a second isolation signal line 105 located in the peripheral region 101b. The first isolation signal line 104 is closer to the display region 101a than the second isolation signal line 105, and both the first isolation signal line 104 and the second isolation signal line 105 extend along a first direction X. The first direction X is the arrangement direction of the first substrate portion 1011 and the second substrate portion 1012.

[0100] In this configuration, the first isolation signal line 104 is connected to the driver chip 103, while the second isolation signal line 105 is not connected to the driver chip 103. Optionally, the driver chip 103 can provide a ground signal for the first isolation signal line 104, in which case the first isolation signal line 104 can be a ground signal line. Alternatively, the driver chip 103 can configure the first isolation signal line 104 as a self-capacitive co-drive (configured as a self-capacitive signal during self-capacitance detection) and a mutual-capacitive ground (configured as a ground signal GND during mutual-capacitance detection). The first isolation signal line 104 can serve as an isolation signal line for isolating the first touch electrode 1021 and the second touch electrode 1022.

[0101] The second isolation signal line 105 can be a ground signal line (GND). The second isolation signal line 105 can be used as an isolation signal line to isolate the TP signal (pulse signal) from other signals (such as display signals).

[0102] In this embodiment, the foldable touch display module 100 may include multiple first isolation signal lines 104 and multiple second isolation signal lines 105. For example... Figure 11 The diagram illustrates two first isolation signal lines 104 and two second isolation signal lines 105. One of the first isolation signal lines 104 and one of the second isolation signal lines 105 can be located on the left side of the display area 101a, and the other first isolation signal line 104 and the other second isolation signal line 105 can be located on the right side of the display area 101a.

[0103] Optionally, there can be multiple first isolation signal lines 104 located on the same side of the display area 101a, and multiple second isolation signal lines 105 located on the same side of the display area 101a. For example... Figure 12 There is one first isolation signal line 104 and one second isolation signal line 105 located on the same side of the display area 101a. Figure 12 There are two first isolation signal lines 104 and two second isolation signal lines 105 located on the same side of the display area 101a.

[0104] As one possible scenario, refer to Figure 11 Multiple first isolation signal lines 104 and multiple second isolation signal lines 105 are located on the side of the first folded corner electrode 1023 and the second folded corner electrode 1024 near the display area 101a. For example, in Figure 11 In the middle, the first isolation signal line 104 on the left side of the display area 101a is closer to the display area 101a than the second isolation signal line 105 on the left side of the display area 101a, and the first isolation signal line 104 on the right side of the display area 101a is closer to the display area 101a than the second isolation signal line 105 on the right side of the display area 101a.

[0105] As another possible scenario, see reference Figure 12Of the multiple first isolation signal lines 104, the first type of first isolation signal line 104a is located on the side of the first folded corner electrode 1023 and the second folded corner electrode 1024 closer to the display area 101a, and the second type of first isolation signal line 104b is located on the side of the first folded corner electrode 1023 and the second folded corner electrode 1024 away from the display area 101a. Of the multiple second isolation signal lines 105, the first type of second isolation signal line 105a is located on the side of the first folded corner electrode 1023 and the second folded corner electrode 1024 closer to the display area 101a, and the second type of second isolation signal line 105b is located on the side of the first folded corner electrode 1023 and the second folded corner electrode 1024 away from the display area 101a. Specifically, the first type of first isolation signal line 104a is closer to the display area 101a than the first type of second isolation signal line 105a, and the second type of first isolation signal line 104b is closer to the display area 101a than the second type of second isolation signal line 105b.

[0106] Optional, see reference Figure 12 The first type first isolation signal line 104a on the left side of display area 101a is closer to display area 101a than the first type second isolation signal line 105a on the left side of display area 101a. The second type first isolation signal line 104b on the left side of display area 101a is closer to display area 101a than the second type second isolation signal line 105b on the left side of display area 101a. The first type first isolation signal line 104a on the right side of display area 101a is closer to display area 101a than the first type second isolation signal line 105a on the right side of display area 101a. The second type first isolation signal line 104b on the right side of display area 101a is closer to display area 101a than the second type second isolation signal line 105b on the right side of display area 101a.

[0107] In this embodiment, the first folded angle electrode 1023 includes a first sub-folded angle electrode 1023z1 and a second sub-folded angle electrode 1023z2. The second folded angle electrode 1024 includes a third sub-folded angle electrode 1024z1 and a fourth sub-folded angle electrode 1024z2.

[0108] The first sub-folded corner electrode 1023z1 and the third sub-folded corner electrode 1024z1 are symmetrically arranged with respect to the boundary line m between the first substrate portion 1011 and the second substrate portion 1012. The orthographic projection of the first sub-folded corner electrode 1023z1 on the display substrate 101 is located at the corner of the first sub-peripheral region 1011b. The orthographic projection of the third sub-folded corner electrode 1024z1 on the display substrate 101 is located at the corner of the second sub-peripheral region 1012b.

[0109] The second sub-folded corner electrode 1023z2 and the fourth sub-folded corner electrode 1024z2 are symmetrically arranged with respect to the boundary line m between the first substrate portion 1011 and the second substrate portion 1012. The orthographic projection of the second sub-folded corner electrode 1023z2 on the display substrate 101 is located at all positions in the first sub-peripheral region 1011b except for the corners, and the orthographic projection of the fourth sub-folded corner electrode 1024z2 on the display substrate 101 is located at all positions in the second sub-peripheral region 1012b except for the corners.

[0110] refer to Figure 1 , Figure 6 , Figure 7 , Figure 11 and Figure 12 The first sub-peripheral region 1011b includes a first region portion 1011b1 extending along a first direction X and a second region portion 1011b2 extending along a second direction Y. The second sub-peripheral region 1012b includes a third region portion 1012b1 extending along the first direction X and a fourth region portion 1012b2 extending along the second direction Y. The second direction Y is perpendicular to the first direction X.

[0111] refer to Figure 1 , Figure 6 , Figure 7 , Figure 11 and Figure 12 The first first folded angle electrode 1023a and the second first folded angle electrode 1023b can be the second sub-folded angle electrode 1023z2, and the third first folded angle electrode 1023c and the fourth first folded angle electrode 1023d can be the first sub-folded angle electrode 1023z1. The first second folded angle electrode 1024a and the second second folded angle electrode 1024b can be the fourth sub-folded angle electrode 1024z2, and the third second folded angle electrode 1024c and the fourth second folded angle electrode 1024d can be the third sub-folded angle electrode 1024z1.

[0112] refer to Figure 13For any one of the first sub-folded corner electrode 1023z1 and the third sub-folded corner electrode 1024z1, each electrode includes a first electrode portion b1 and a second electrode portion b2. Both the first electrode portion b1 and the second electrode portion b2 are strip-shaped electrodes, and the extending direction of the first electrode portion b1 intersects with, for example, the extending direction of the second electrode portion b2, such as being perpendicular. The orthographic projection of the first electrode portion b1 of the first sub-folded corner electrode 1023z1 onto the display substrate 101 is located in the first region portion 1011b1, and the orthographic projection of the second electrode portion b2 of the first sub-folded corner electrode 1023z1 onto the display substrate 101 is located in the second region portion 1011b2. The orthographic projection of the first electrode portion b1 of the third sub-folded corner electrode 1024z1 onto the display substrate 101 is located in the third region portion 1012b1, and the orthographic projection of the second electrode portion b2 of the fourth sub-folded corner electrode 1024z2 onto the display substrate 101 is located in the fourth region portion 1012b2.

[0113] Optionally, the length of the first electrode portion b1 and the length of the second electrode portion b2 can be 3 to 5 times the unit touch size. The size of the unit touch pattern can range from 3800 μm to 4500 μm. The unit touch pattern can be equivalent to the main electrode 10211 of the first touch electrode 1021.

[0114] Optional, see reference Figure 14 Each electrode includes a first electrode portion b1, a second electrode portion b2, and a third electrode portion b3. The radius of curvature R1 of the third electrode portion b3 on the side closest to the display area 101a can be greater than or equal to the minimum spacing between traces. The difference R2-R1 between the radius of curvature R2 on the side of the third electrode portion b3 furthest from the display area 101a and the radius of curvature R1 on the side of the third electrode portion b3 closest to the display area 101a can be the width of the third electrode portion b3. Considering trace space and meeting trace rules, the difference R2-R1 can be made as large as possible to increase signal strength.

[0115] refer to Figure 14 The third electrode portion b3 can be an arc-shaped electrode. One end of the third electrode portion b3 is connected to the first electrode portion b1, and the other end is connected to the second electrode portion b2.

[0116] Optionally, the central angle of the arc-shaped electrode can be determined based on the central angle of the arc at the corner of the display substrate 101. For example, the central angle of the arc at the corner of the display substrate 101 ranges from 30 degrees to 120 degrees. Optionally, the central angle of the arc-shaped electrode can be equal to the central angle of the arc at the corner of the display substrate 101; for example, if the central angle of the arc at the corner of the display substrate 101 is 90 degrees, the corresponding range of the central angle of the arc-shaped electrode can also be 90 degrees.

[0117] Optionally, both the second sub-folded corner electrode 1023z2 and the fourth sub-folded corner electrode 1024z2 are strip electrodes. Typically, the length of the display substrate 101 along the first direction X is greater than the length of the display substrate 101 along the second direction Y. Therefore, the orthographic projections of the second sub-folded corner electrode 1023z2 and the fourth sub-folded corner electrode 1024z2 on the display substrate 101 can be located in the region extending along the first direction X within the peripheral region 101b. For example, the orthographic projection of the second sub-folded corner electrode 1023z2 on the display substrate 101 is located in the first region portion 1011b1, and the orthographic projection of the fourth sub-folded corner electrode 1024z2 on the display substrate 101 is located in the third region portion 1012b1.

[0118] In this embodiment, the first folded angle signal line 1027 connected to the first folded angle electrode 1023 may be located on the same layer as the first folded angle electrode 1023. Alternatively, the first folded angle signal line 1027 connected to the first folded angle electrode 1023 may be located on a different layer than the first folded angle electrode 1023.

[0119] For example, the first folded corner signal line 1027, which is connected to the first folded corner electrode 1023, has one of the first folded corner electrodes 1023 located in the first touch layer a1 and the other in the second touch layer a3. In this case, the first folded corner signal line 1027 and the first folded corner electrode 1023 can be electrically connected through a via in the peripheral area 101b of the touch insulating layer a2.

[0120] In this embodiment, the second folded angle signal line 1028 connected to the second folded angle electrode 1024 can be located on the same layer as the second folded angle electrode 1024. Alternatively, the second folded angle signal line 1028 connected to the second folded angle electrode 1024 can be located on a different layer than the second folded angle electrode 1024.

[0121] For example, the second folded angle signal line 1028 connected to the second folded angle electrode 1024 is located in the first touch layer a1 and the other in the second touch layer a3. In this case, the second folded angle signal line 1028 and the second folded angle electrode 1024 can be electrically connected through a via in the peripheral area 101b of the touch insulating layer a2.

[0122] In this embodiment, the first folded corner electrode 1023, the second folded corner electrode 1024, the first folded corner signal line 1027, and the second folded corner signal line 1028 can be fabricated simultaneously during the fabrication of the first touch electrode 1021 and the second touch electrode 1022. Furthermore, the mask for forming the first touch layer a1 and the second touch layer a3 can be modified to form folded corner electrodes and folded corner signal lines conforming to the shape of the foldable touch display module in the peripheral region 101b. That is, this process does not introduce additional photolithography steps or add additional film layers that would increase the thickness of the foldable touch display module, thus minimizing process complexity and cost while achieving the folded corner detection function.

[0123] refer to Figure 5 The first folded corner electrode 1023, the first folded corner signal line 1027, the second folded corner electrode 1024, and the second folded corner electrode 1024 are all located in the first touch layer a1. Figure 5 The first folded corner electrode 1023 and the first folded corner signal line 1027 are shown, but the second folded corner electrode 1024 and the second folded corner signal line 1028 are not shown. In this case, the first folded corner electrode 1023, the first folded corner signal line 1027, the second folded corner electrode 1024, and the second folded corner signal line 1028 can be fabricated using the same process as the portions of the first touch electrode 1021 and the second touch electrode 1022 located in the first touch layer a1.

[0124] Or, refer to Figure 15 The first folded corner electrode 1023, the first folded corner signal line 1027, and the second folded corner electrode 1024 are all located in the second touch layer a3. Figure 15 The first folded corner electrode 1023 and the first folded corner signal line 1027 are shown, but the second folded corner electrode 1024 and the second folded corner signal line 1028 are not shown. In this case, the first folded corner electrode 1023, the first folded corner signal line 1027, the second folded corner electrode 1024, and the second folded corner signal line 1028 can be fabricated using the same process as the portions of the first touch electrode 1021 and the second touch electrode 1022 located in the second touch layer a3.

[0125] Or, refer to Figure 16 The first folded angle electrode 1023 and the second folded angle electrode 1024 are both located in the first touch layer a1, and the first folded angle signal line 1027 and the second folded angle signal line 1028 are both located in the second touch layer a3. Figure 16The first folded corner electrode 1023 and the first folded corner signal line 1027 are shown, but the second folded corner electrode 1024 and the second folded corner signal line 1028 are not shown. In this case, the first folded corner electrode 1023 and the second folded corner electrode 1024 can be fabricated using the same process as the portions of the first touch electrode 1021 and the second touch electrode 1022 located in the first touch layer a1. The first folded corner signal line 1027 and the second folded corner signal line 1028 can be fabricated using the same process as the portions of the first touch electrode 1021 and the second touch electrode 1022 located in the second touch layer a3.

[0126] Alternatively, the first folded corner electrode 1023 and the second folded corner electrode 1024 are both located in the second touch layer a3, and the first folded corner signal line 1027 and the second folded corner signal line 1028 are both located in the first touch layer a1. In this case, the first folded corner electrode 1023 and the second folded corner electrode 1024 can be fabricated using the same process as the portions of the first touch electrode 1021 and the second touch electrode 1022 located in the second touch layer a3. The first folded corner signal line 1027 and the second folded corner signal line 1028 can be fabricated using the same process as the portions of the first touch electrode 1021 and the second touch electrode 1022 located in the first touch layer a1.

[0127] Optionally, the first folded angle electrode 1023, the second folded angle electrode 1024, the first folded angle signal line 1027 and the second folded angle signal line 1028 can all be a triple-layer structure of Ti (titanium), aluminum (Al) and titanium (Ti).

[0128] In summary, this application provides a foldable touch display module, which includes a display substrate, a touch substrate, and a driving chip. The driving chip can determine the touch position based on the change in capacitance sensing information between the first touch electrode and the second touch electrode, and is used to determine the folding angle between the first substrate portion and the second substrate portion of the display substrate based on the change in capacitance sensing information between the first folding angle electrode and the second folding angle electrode. That is, the electrode used to determine the folding angle in the foldable touch display module is independent of the electrode used to implement the touch function, thereby avoiding interference from touch signals, accidental touches, or water droplets during folding angle detection, and ensuring the accuracy and reliability of folding angle detection.

[0129] Figure 17 This is a schematic diagram of the structure of a foldable touch display device provided in an embodiment of this application. (Reference) Figure 17The foldable touch display device includes a power supply component 200 and a foldable touch display module 100 as described above. The power supply component 200 is connected to the foldable touch display module 100, and the power supply component 200 supplies power to the foldable touch display module 100.

[0130] Optionally, the foldable touch display device can be an organic light-emitting diode (OLED) display device. The foldable touch display device can be any suitable display device, including but not limited to mobile phones, tablets, televisions, monitors, laptops, digital photo frames, car navigation systems, and e-readers, as well as any product or component with display functionality.

[0131] Since the foldable touch display device can have essentially the same technical effects as the foldable touch display panel described in the previous embodiments, for the sake of brevity, the technical effects of the foldable touch display device will not be described again here.

[0132] Figure 18 This is a flowchart illustrating a method for determining a folding angle according to an embodiment of this application. This method can be used to determine the folding angle between the first substrate portion 1011 and the second substrate portion 1012 in the foldable touch display module 100 described above. (Reference) Figure 18 The method includes:

[0133] Step 1: The driver chip in the foldable touch display module provides a touch detection signal to the first touch electrode in the touch substrate at the first moment. When the touch detection signal passes through the first touch electrode, the first touch electrode will generate a coupling capacitance with the second touch electrode in the touch substrate. The driver chip determines the touch position based on the change in capacitance sensing information between the second touch electrode and the first touch electrode.

[0134] refer to Figure 19 The driver chip 103 can output a SYNC (Synchronous signal) synchronization signal at the first moment. When the level of the SYNC synchronization signal is at the target level (high level), the first touch electrode 1021 synchronously generates its mutual capacitance signal and self-capacitance signal. Under the action of the mutual capacitance signal and self-capacitance signal of the first touch electrode 1021, the second touch electrode 1022 synchronously generates its own mutual capacitance signal and self-capacitance signal. During the self-capacitance test, the driver chip can provide the same signal to both the first and second touch electrodes 1021.

[0135] Mutual capacitance signal refers to the capacitive effect between two adjacent conductors. In a touchscreen, there is typically an electrode array consisting of horizontal and vertical electrodes (in this embodiment, this refers to multiple first touch electrodes arranged along a first direction and multiple second touch electrodes arranged along a second direction). When a finger or other touch object approaches or touches the screen, it changes the electric field distribution between the horizontal and vertical electrodes, causing a change in their mutual capacitance. The signal generated by this changing capacitance value is the mutual capacitance signal.

[0136] Self-capacitance refers to the capacitance between a single conductor and its surrounding environment. In self-capacitance touch technology, each electrode can be considered an independent capacitance detection unit, with a certain capacitance between it and ground (GND). When a finger approaches or touches an electrode, it changes the capacitance value between the electrode and its surrounding environment; the signal generated by this change in capacitance value is the self-capacitance signal.

[0137] Optionally, the driver chip 103 sends a voltage signal to the first touch electrode 1021. Since there is coupling between the first touch electrode 1021 and the second touch electrode 1022, when the voltage passes through the first touch electrode 1021, it generates an induced charge on the second touch electrode 1022, thus charging the second touch electrode 1022. This causes a change in the charge of the second touch electrode 1022, meaning that a current will exist on the second touch electrode 1022. Because there is a certain voltage on the second touch electrode 1022, this is reflected in the timing diagram as the generation of a certain voltage. That is, the mutual capacitance signal of the second touch electrode 1022 is generated by coupling, and since the resistance is relatively small, the mutual capacitance signal of the second touch electrode 1022 is relatively small.

[0138] Step 2: After the first time period, the driver chip provides a folding angle detection signal to the first folding angle electrode in the touch substrate at the second time period. Under the action of the folding angle signal, the second folding angle electrode generates a coupling capacitance with the first folding angle electrode. The driver chip determines the folding angle based on the capacitance value between the second folding angle electrode and the first folding angle electrode, and then the second time period is passed again.

[0139] Optionally, the duration of the first time period t1 ranges from 1 / 360 of a second (s) to 1 / 240 of a second (s).

[0140] Optionally, when the display substrate 101 is in a flattened state, the coupling between the second folded corner electrode 1024 and the first folded corner electrode 1023 is weakest, and the signal strength is smallest, meaning the capacitance between the second folded corner electrode 1024 and the first folded corner electrode 1023 is smallest. When the display substrate 101 is in a fully folded state, the coupling between the second folded corner electrode 1024 and the first folded corner electrode 1023 is strongest, and the signal strength is largest, meaning the capacitance between the second folded corner electrode 1024 and the first folded corner electrode 1023 is largest.

[0141] Optionally, the driver chip 103 may store a correspondence between the folding angle and the capacitance value of a reference capacitor. The capacitance value of the reference capacitor may be the capacitance value of a standard capacitor between the first folding angle electrode 1023 and the second folding angle electrode 1024, given a known folding angle. The driver chip 103 can detect the capacitance value between the first substrate portion 1011 and the second substrate portion 1012, and determine the folding angle corresponding to that capacitance value based on the stored correspondence. This allows the display control component in the foldable touch display device to offer more possibilities for the application products in the foldable touch display module, such as automatically adjusting the display layout and optimizing the display content. Of course, the foldable touch display module can also display the folding angle.

[0142] In this embodiment, the correspondence between the folding angle and the capacitance value of the reference capacitor can also be stored in the display control component. The driver chip 103 is connected to the display control component, and the driver chip 103 can send the detected capacitance value to the display control component. The display control component can determine the folding angle based on the received capacitance value and the correspondence.

[0143] Optionally, the duration of the second time period t2 is 1 / 360s.

[0144] After the second time period, steps 1 and 2 are repeated, and this process is repeated cyclically to achieve touch functionality and folding angle detection. That is, within the same cycle (each cycle can last 1 / 120s), touch functionality is achieved in stages through the first touch electrode 1021 and the second touch electrode 1022, while folding angle detection is performed through the first folding angle electrode 1023 and the second folding angle electrode 1024. This ensures that touch functionality and folding angle detection do not interfere with each other, improving the reliability and accuracy of both functions.

[0145] In summary, the embodiments of this application provide a method for determining the folding angle. This method can determine the touch position and the folding angle in stages, thereby avoiding interference from touch signals, accidental touches, or water droplets during folding angle detection, and ensuring the accuracy and reliability of folding angle detection.

[0146] This application also provides a folding angle determination device, which may include a memory and a processor. The memory stores computer programs or code, and the processor executes the computer program to implement the folding angle determination method provided in the above embodiments, for example... Figure 18 The method shown.

[0147] This application provides a computer-readable storage medium including instructions or code that, when executed on a computer, cause the computer to perform the folding angle determination method provided in the above embodiments, for example... Figure 18 The method shown.

[0148] This application also provides a computer program product containing instructions that, when run on a computer, cause the computer to execute the folding angle determination method provided in the above-described method embodiments, for example... Figure 18 The method shown.

[0149] The terminology used in the embodiments section of this application is for explaining the embodiments of this application only and is not intended to limit this application. Unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains.

[0150] The Description of Embodiments section of this application describes several embodiments; however, this description is exemplary and not restrictive, and it will be apparent to those skilled in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with, or may replace, any feature or element of any other embodiment.

[0151] This application includes and contemplates combinations of features and elements known to those skilled in the art. The embodiments, features, and elements disclosed in this application may also be combined with any conventional features or elements to form a unique inventive scheme as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive schemes to form another unique inventive scheme as defined by the claims. Therefore, it should be understood that any feature shown and / or discussed in this application may be implemented individually or in any suitable combination. Therefore, the embodiments are not limited except by the limitations imposed by the appended claims and their equivalents. Furthermore, various modifications and changes may be made within the scope of the appended claims.

[0152] Furthermore, in describing representative embodiments, the specification may have presented methods and / or processes as a specific sequence of steps. However, the method or process should not be limited to the specific order of steps described herein, to the extent that it does not depend on such a specific order. As will be understood by those skilled in the art, other sequences of steps are also possible. Therefore, the specific order of steps set forth in the specification should not be construed as a limitation of the claims. Moreover, the claims concerning the method and / or process should not be limited to the steps performed in the written order, and those skilled in the art will readily understand that these orders can be varied and still remain within the spirit and scope of the embodiments of this application.

[0153] In the accompanying drawings, the size of one or more constituent elements, the thickness of layers, or areas are sometimes exaggerated for clarity. Furthermore, the drawings schematically illustrate ideal examples, and this application is not limited to the shapes or numerical values ​​shown in the drawings.

[0154] The ordinal numbers "first," "second," and "third" used in this specification are for the purpose of avoiding confusion among the constituent elements, not for limiting the quantity. The term "multiple" in this application refers to two or more quantities.

[0155] In this specification, unless otherwise expressly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection, an indirect connection via an intermediate component, or a connection within two components. Those skilled in the art will understand the meaning of the above terms in this application according to the specific circumstances.

[0156] In this specification, "connection" includes the situation where constituent elements are connected together by a component that has a certain electrical function. There are no particular limitations on the "component that has a certain electrical function," as long as it enables the transmission of electrical signals between the connected constituent elements. Examples of "components that have a certain electrical function" include not only electrodes and wiring, but also switching elements such as transistors, resistors, inductors, capacitors, and other components with various functions.

[0157] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A foldable touch display module, characterized in that, The foldable touch display module includes: The display substrate includes a first substrate portion and a second substrate portion. The first substrate portion includes a first sub-display area and a first sub-peripheral area. The second substrate portion includes a second sub-display area and a second sub-peripheral area. The first sub-display area and the second sub-display area constitute the display area of ​​the display substrate. The first sub-peripheral area and the second sub-peripheral area constitute the peripheral area of ​​the display substrate. The peripheral area surrounds the display area. A touch substrate includes a first touch electrode, a second touch electrode, a first folded corner electrode, and a second folded corner electrode. The orthographic projections of the first touch electrode and the second touch electrode on the display substrate are both located in the display area. The first touch electrode and the second touch electrode are insulated from each other. The orthographic projection of the first folded corner electrode on the display substrate is located in a first sub-peripheral region, and the orthographic projection of the second folded corner electrode on the display substrate is located in a second sub-peripheral region. The first folded corner electrode and the second folded corner electrode are symmetrically arranged with respect to the boundary line between the first substrate portion and the second substrate portion. The display substrate includes a driver chip whose orthographic projection on the display substrate is located in the peripheral area. The driver chip is electrically connected to the first touch electrode, the second touch electrode, the first folded corner electrode, and the second folded corner electrode. The driver chip is used to determine the touch position based on the change in capacitance sensing information between the first touch electrode and the second touch electrode, and to determine the folding angle of the first substrate portion and the second substrate portion based on the capacitance value between the first folded corner electrode and the second folded corner electrode.

2. The foldable touch display module according to claim 1, characterized in that, The foldable touch display module includes: a first touch signal line, a second touch signal line, a first folding angle signal line, and a second folding angle signal line; One end of the first touch signal line is connected to the first touch electrode, and the other end is connected to the driver chip; One end of the second touch signal line is connected to the second touch electrode, and the other end is connected to the driver chip; One end of the first folded angle signal line is connected to the first folded angle electrode, and the other end is connected to the driver chip; One end of the second folded angle signal line is connected to the second folded angle electrode, and the other end is connected to the driver chip.

3. The foldable touch display module according to claim 1, characterized in that, The foldable touch display module includes: a first isolation signal line and a second isolation signal line located in the peripheral area; The first isolation signal line is closer to the display area than the second isolation signal line. Both the first isolation signal line and the second isolation signal line extend along a first direction, which is the arrangement direction of the first substrate portion and the second substrate portion. The first isolation signal line is connected to the driver chip, while the second isolation signal line is not connected to the driver chip.

4. The foldable touch display module according to claim 3, characterized in that, The foldable touch display module includes: multiple first isolation signal lines and multiple second isolation signal lines; The plurality of first isolation signal lines and the plurality of second isolation signal lines are all located on the side of the first folded corner electrode and the second folded corner electrode closer to the display area; or, Of the plurality of first isolation signal lines, the first type of first isolation signal line is located on the side of the first folded corner electrode and the second folded corner electrode closer to the display area, and the second type of first isolation signal line is located on the side of the first folded corner electrode and the second folded corner electrode farther from the display area; of the plurality of second isolation signal lines, the first type of second isolation signal line is located on the side of the first folded corner electrode and the second folded corner electrode closer to the display area, and the second type of second isolation signal line is located on the side of the first folded corner electrode and the second folded corner electrode farther from the display area; the first type of first isolation signal line is closer to the display area than the first type of second isolation signal line, and the second type of first isolation signal line is closer to the display area than the second type of second isolation signal line.

5. The foldable touch display module according to any one of claims 1 to 4, characterized in that, The first folded angle electrode includes: a first sub-folded angle electrode and a second sub-folded angle electrode; the second folded angle electrode includes: a third sub-folded angle electrode and a fourth sub-folded angle electrode. The first sub-folded corner electrode and the third sub-folded corner electrode are symmetrically arranged with respect to the boundary line between the first substrate portion and the second substrate portion. The orthographic projection of the first sub-folded corner electrode on the display substrate is located at the corner of the first sub-peripheral region, and the orthographic projection of the third sub-folded corner electrode on the display substrate is located at the corner of the second sub-peripheral region. The second sub-folded corner electrode and the fourth sub-folded corner electrode are symmetrically arranged with respect to the boundary line between the first substrate portion and the second substrate portion. The orthographic projection of the second sub-folded corner electrode on the display substrate is located at a position other than the corner in the first sub-peripheral region, and the orthographic projection of the fourth sub-folded corner electrode on the display substrate is located at a position other than the corner in the second sub-peripheral region.

6. The foldable touch display module according to claim 5, characterized in that, The first sub-peripheral region includes a first region portion extending along a first direction and a second region portion extending along a second direction. The second sub-peripheral region includes a third region portion extending along the first direction and a fourth region portion extending along the second direction. The first direction is the arrangement direction of the first substrate portion and the second substrate portion, and the second direction is perpendicular to the first direction. For any one of the first sub-folded angle electrode and the third sub-folded angle electrode, the electrode includes a first electrode portion and a second electrode portion, both of which are strip-shaped electrodes; The orthographic projection of the first electrode portion of the first sub-folded corner electrode onto the display substrate is located in the first region portion, and the orthographic projection of the second electrode portion of the first sub-folded corner electrode onto the display substrate is located in the second region portion; The orthographic projection of the first electrode portion of the third sub-folded corner electrode onto the display substrate is located in the third region, and the orthographic projection of the first electrode portion of the third sub-folded corner electrode onto the display substrate is located in the fourth region.

7. The foldable touch display module according to claim 6, characterized in that, Each of the electrodes further includes a third electrode portion, which is an arc-shaped electrode. One end of the third electrode portion is connected to the first electrode portion, and the other end is connected to the second electrode portion.

8. The foldable touch display module according to claim 6, characterized in that, Both the second sub-folded electrode and the fourth sub-folded electrode are strip-shaped electrodes. The orthographic projection of the second sub-folded electrode on the display substrate is located in the first region, and the orthographic projection of the fourth sub-folded electrode on the display substrate is located in the third region.

9. The foldable touch display module according to any one of claims 1 to 4, characterized in that, The touch substrate includes: a first touch layer, a touch insulating layer, and a second touch layer, which are sequentially stacked in a direction away from the display substrate; The first folded corner electrode and the second folded corner electrode are located in the first touch layer or the second touch layer, and the first folded corner electrode and the second folded corner electrode are located in the same layer.

10. The foldable touch display module according to claim 9, characterized in that, The first folded corner signal line connected to the first folded corner electrode is located on the same layer as the first folded corner electrode, or the first folded corner signal line connected to the first folded corner electrode is located on the first touch layer and the other one is located on the second touch layer; when the first folded corner signal line and the first folded corner electrode are located on the first touch layer and the other one is located on the second touch layer, the first folded corner signal line and the first folded corner electrode are connected through a via in the touch insulating layer; The second folded angle signal line connected to the second folded angle electrode is located on the same layer as the second folded angle electrode, or the second folded angle signal line connected to the second folded angle electrode is located on the first touch layer and the other is located on the second touch layer; when the second folded angle signal line and the second folded angle electrode are located on the first touch layer and the other is located on the second touch layer, the second folded angle signal line and the second folded angle electrode are connected through a via in the touch insulating layer.

11. The foldable touch display device according to any one of claims 1 to 4, characterized in that, The touch substrate includes: four first folded corner electrodes and four second folded corner electrodes; The four first folded corner electrodes and the four second folded corner electrodes correspond one-to-one. The orthographic projection of each first folded corner electrode on the display substrate and the corresponding second folded corner electrode are symmetrically arranged with respect to the boundary line between the first substrate portion and the second substrate portion.

12. A foldable touch display device, characterized in that, The foldable touch display device includes: a power supply component and a foldable touch display module as described in any one of claims 1 to 11; The power supply component is connected to the foldable touch display module, and the power supply component is used to supply power to the foldable touch display module.

13. A method for determining a folding angle, characterized in that, The method is used to determine the folding angle between the first substrate portion and the second substrate portion in the foldable touch display module according to any one of claims 1 to 11; the method includes: Repeat steps 1 to 2 in a loop; Step 1: The driving chip in the foldable touch display module provides a touch detection signal to the first touch electrode in the touch substrate at the first moment. When the touch detection signal passes through the first touch electrode, the first touch electrode 1021 will generate a coupling capacitance with the second touch electrode in the touch substrate. The driving chip determines the touch position based on the change in capacitance sensing information between the second touch electrode and the first touch electrode. Step 2: After the first time period, the driving chip provides a folding angle detection signal to the first folding angle electrode in the touch substrate at the second time period. Under the action of the folding angle signal, the second folding angle electrode in the touch substrate generates a coupling capacitance with the first folding angle electrode. The driving chip determines the folding angle based on the capacitance value between the second folding angle electrode and the first folding angle electrode, and then the second time period is passed again.

14. A folding angle determining device, characterized in that, The device includes a memory and a processor, the memory being used to store computer programs or code, and the processor being used to execute the computer programs or code to implement the folding angle determination method as described in claim 13.

15. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes instructions or code that, when executed on a computer, cause the computer to perform the folding angle determination method as described in claim 13.

Images