Touch module and display device

Abstract

The invention provides a touch module and a display device. The touch module comprises a first electrode layer, a second electrode layer, a pressure-sensitive layer and a third electrode layer which are arranged in a stacked mode. The first electrode layer and the second electrode layer form an electromagnetic coil functional layer, the pressure-sensitive layer is located between the second electrode layer and the third electrode layer, and the second electrode layer, the third electrode layer and the pressure-sensitive layer form a pressure-sensitive functional layer. In the touch module, the pressure-sensitive functional layer and the electromagnetic coil functional layer are integrated together, so that lightening and thinning of the touch module are facilitated.

Description

Technical Field

[0001] The present disclosure relates to the field of touch control technology, and in particular, to a touch control module and a display device. Background Art

[0002] With the rapid development of touch technology, consumers have more and more functional requirements for touch products. For example, in some touch products, in order to improve user experience such as handwriting experience and gesture operation, other functional layers need to be set on the basis of setting the capacitive touch film layer. However, the setting of other functional layers may increase the overall production cost of the touch product and increase the overall thickness of the touch product. Therefore, how to ensure the normal operation of the touch and other functional layers without setting too many film layer structures, so that the handwriting experience and gesture operation experience of the touch product can be improved, has become an urgent problem to be solved. Summary of the invention

[0003] The present disclosure provides a touch module and a display device. By making a pressure-sensitive functional layer and an electromagnetic coil functional layer share an electrode layer in the touch module, the functions of electromagnetic touch, pressure detection and capacitive touch are realized while reducing the thickness and cost of the touch module.

[0004] The first aspect of the present disclosure provides a touch control module, which includes a first electrode layer, a second electrode layer, a pressure-sensitive layer and a third electrode layer which are stacked. The first electrode layer and the second electrode layer constitute an electromagnetic coil functional layer, the pressure-sensitive layer is located between the second electrode layer and the third electrode layer, and the second electrode layer, the third electrode layer and the pressure-sensitive layer constitute a pressure-sensitive functional layer.

[0005] In the above solution, the pressure-sensitive functional layer and the electromagnetic coil functional layer share the design of the second electrode layer. By integrating the pressure-sensitive functional layer and the electromagnetic coil functional layer together and reducing the number of electrode layers, the touch module is made thinner and lighter.

[0006] In a specific embodiment of the first aspect of the present disclosure, the first electrode layer includes a plurality of first electromagnetic coil electrodes extending along a first direction, and a first opening extending along the first direction is provided between adjacent first electromagnetic coil electrodes. The second electrode layer includes a plurality of second electromagnetic coil electrodes extending along a second direction, and a second opening extending along the second direction is provided between adjacent second electromagnetic coil electrodes, and the first direction and the second direction intersect.

[0007] In the above solution, the first electromagnetic coil electrode and the second electromagnetic coil electrode are formed on the first electrode layer and the second electrode layer respectively to determine the coordinates of the electromagnetic pen touch in the first direction and the second direction, thereby realizing the electromagnetic touch function.

[0008] Optionally, the first opening and the second opening are both U-shaped. In this way, the first electromagnetic coil electrode and the second electromagnetic coil electrode are correspondingly arranged to form a U-shaped opening, which can improve the sensitivity of the electromagnetic touch function.

[0009] In a specific embodiment of the first aspect of the present disclosure, the second electrode layer includes a first pressure-sensitive electrode, the third electrode layer includes a second pressure-sensitive electrode, and the first pressure-sensitive electrode, the second pressure-sensitive electrode and the pressure-sensitive layer constitute a pressure-sensitive functional layer.

[0010] In the above solution, the second electromagnetic coil electrode and the first pressure-sensitive electrode share the second electrode layer to simplify the structure of the touch module, thereby facilitating the thinning of the touch module.

[0011] Optionally, the second electrode layer includes a plurality of second electromagnetic coil electrodes and a plurality of first pressure-sensitive electrodes, the plurality of second electromagnetic coil electrodes are arranged at intervals, and the first pressure-sensitive electrodes extend along the second direction and are located between adjacent second electromagnetic coil electrodes. In this way, a solution is provided for simultaneously forming the second electromagnetic coil electrodes and the first pressure-sensitive electrodes using the second electrode layer, which improves the lightness and thinness of the touch module while also improving the applicability of the disclosed solution.

[0012] Optionally, the second electromagnetic coil electrode is reused as the first piezoresistance electrode, that is, the entire second electrode layer is configured as the second electromagnetic coil electrode. Thus, the design of reusing the second electromagnetic coil electrode as the first piezoresistance electrode simplifies the film layer configuration and improves the utilization rate of the second electrode layer.

[0013] In a specific embodiment of the first aspect of the present disclosure, the first electrode layer and the third electrode layer constitute a touch function layer. The touch function layer includes a plurality of parallel first touch electrodes, a plurality of parallel second touch electrodes, and a plurality of bridge electrodes, the first touch electrodes and the second touch electrodes intersect each other, the first touch electrodes are disconnected into a plurality of first electrode blocks at the intersection with the second touch electrodes, and the disconnected first electrode blocks are electrically connected via the bridge electrodes.

[0014] In the above scheme, the first electrode layer and the third electrode layer that form the touch function layer are also used to form the design of the first electromagnetic coil electrode and the first pressure-sensitive electrode, which not only integrates capacitive touch, pressure detection and electromagnetic touch into one, eliminating the production process of pressure detection and electromagnetic touch external stickers, but also reduces the thickness of the touch module and the production cost.

[0015] In a specific implementation of the first aspect of the present disclosure, the touch module further includes an insulating layer located between the first electrode layer and the third electrode layer.

[0016] In the above solution, the insulating layer can prevent the first touch electrode and the second touch electrode from directly contacting each other under normal working conditions, thereby avoiding short circuit problems, stabilizing the current path, and reducing signal interference.

[0017] In a specific embodiment of the first aspect of the present disclosure, the second electrode layer is located on a side of the third electrode layer away from the first electrode layer, the third electrode layer includes a first touch electrode and a second touch electrode, the first electrode layer includes a bridge electrode, and the second electromagnetic coil electrode is reused as a first pressure-sensitive electrode.

[0018] In the above solution, the design of reusing the second electromagnetic coil electrode as the first pressure-sensitive electrode not only improves the integration of the touch module, but also simplifies the process of the touch module and saves production costs.

[0019] Optionally, the first touch electrode and / or the second touch electrode are multiplexed as the second pressure-sensitive electrode. In this way, the design of multiplexing at least one touch electrode as the second pressure-sensitive electrode not only effectively improves the integration of the touch module, but also reduces the load of the first touch electrode and the second touch electrode by using the pressure-sensitive layer, thereby optimizing the performance of the touch module.

[0020] In a specific implementation of the first aspect of the present disclosure, the first touch electrode includes a plurality of first electrode blocks extending along a first direction, and the second touch electrode is a strip electrode extending along a second direction.

[0021] In a specific embodiment of the first aspect of the present disclosure, the first touch electrode includes a plurality of first electrode blocks extending along a first direction, the second touch electrode includes a plurality of second electrode blocks extending along a second direction, the second electrode blocks disconnected from each other are electrically connected by a connecting electrode, and the connecting electrode is arranged on the same layer as the second touch electrode.

[0022] Optionally, the first electrode block and the second electrode block are in a rhombus shape.

[0023] In a specific embodiment of the first aspect of the present disclosure, the second electrode layer is located on the side of the first electrode layer facing away from the third electrode layer, the pressure-sensitive layer is located on the side of the second electrode layer facing the third electrode layer, the third electrode layer includes a first touch electrode and a second touch electrode, the first electrode layer includes a bridge electrode, and the second electromagnetic coil electrode is reused as the first pressure-sensitive electrode.

[0024] In the above solution, another structure of a touch module is provided in which the second electromagnetic coil electrode is reused as the first pressure-sensitive electrode, which not only improves the integration of the touch module, but also improves the applicability of the solution.

[0025] Optionally, the first touch control electrode and / or the second touch control electrode are reused as the second pressure-sensitive electrode. In this way, the film layer design of the touch control module is effectively simplified, which is conducive to achieving its lightness and thinness.

[0026] In a specific embodiment of the first aspect of the present disclosure, the first touch electrode includes a plurality of first electrode blocks extending along a first direction, the second touch electrode is a strip electrode extending along a second direction, and the orthographic projection of the first touch electrode on the first electrode layer falls outside the first electromagnetic coil electrode.

[0027] In the above solution, the first touch electrode and the first electromagnetic coil electrode do not overlap in space, which can prevent the first electromagnetic coil electrode from shielding the touch signal corresponding to the first touch electrode.

[0028] Optionally, the orthographic projections of the first electrode block and the bridge electrode on the first electrode layer fall within the first opening. In this way, not only the influence of the first electromagnetic coil electrode on the touch signal is avoided, but also the integration of the touch module is improved.

[0029] A second aspect of the present disclosure provides a display device, which includes the touch module in the first aspect, and the touch module is located on the display side of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A cross-sectional schematic diagram of a touch module provided by an embodiment of the present disclosure.

[0031] Figure 2 A cross-sectional schematic diagram of a touch module provided by another embodiment of the present disclosure.

[0032] Figure 3 A schematic diagram of the structure of an electromagnetic coil functional layer provided in one embodiment of the present disclosure.

[0033] Figure 4 A schematic diagram of the structure of a first electromagnetic coil electrode of a touch module provided in one embodiment of the present disclosure.

[0034] Figure 5 A schematic diagram of the structure of a second electromagnetic coil electrode of a touch module provided in one embodiment of the present disclosure.

[0035] Figure 6 A schematic diagram of the structure of a second electrode layer of a touch module provided in one embodiment of the present disclosure.

[0036] Figure 7 A schematic structural diagram of a pressure-sensitive functional layer provided in one embodiment of the present disclosure.

[0037] Figure 8 A schematic structural diagram of a pressure-sensitive functional layer provided in another embodiment of the present disclosure.

[0038] Fig. 9 A schematic structural diagram of a pressure-sensitive functional layer provided in another embodiment of the present disclosure.

[0039] Fig.10 A schematic structural diagram of a pressure-sensitive functional layer provided in another embodiment of the present disclosure.

[0040] Fig.11 A schematic diagram of the structure of a touch function layer provided in one embodiment of the present disclosure.

[0041] Fig.12 A cross-sectional schematic diagram of a touch module provided by an embodiment of the present disclosure.

[0042] Fig.13 A cross-sectional schematic diagram of a touch module provided by another embodiment of the present disclosure.

[0043] Fig.14 A schematic structural diagram of a pressure-sensitive functional layer provided in one embodiment of the present disclosure.

[0044] Fig.15 A schematic structural diagram of a pressure-sensitive functional layer provided in another embodiment of the present disclosure.

[0045] Fig.16 A schematic diagram of the structure of a touch function layer provided in one embodiment of the present disclosure.

[0046] Fig.17 A schematic structural diagram of a pressure-sensitive functional layer provided in another embodiment of the present disclosure.

[0047] Fig.18 A schematic diagram of the structure of a first electromagnetic coil electrode and a touch function layer provided in one embodiment of the present disclosure.

[0048] Reference numerals:

[0049] 110-first electrode layer; 111-first electromagnetic coil electrode; 112-first opening;

[0050] 120 - second electrode layer; 121 - second electromagnetic coil electrode; 122 - second opening;

[0051] 130- a third electrode layer;

[0052] 140-electromagnetic coil functional layer;

[0053] 150 - pressure-sensitive functional layer; 151 - pressure-sensitive layer; 152 - first pressure-sensitive electrode; 153 - second pressure-sensitive electrode;

[0054] 160 - touch function layer; 161 - first touch electrode; 161a - first electrode block; 162 - second touch electrode; 162a - second electrode block; 163 - bridge electrode; 164 - connection electrode;

[0055] 170 - insulation layer; X - first direction; Y - second direction. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0057] A display device with a touch screen allows users to operate directly on the display device with their fingers, thereby improving the user experience. However, for some application scenarios with high-precision input requirements, such as painting, design, handwritten notes, etc., a combination of an electromagnetic coil functional layer and an electromagnetic pen is required to achieve this. The electromagnetic pen has the advantages of being low in price, taking up less space, and being easy to configure, but it is necessary to separately set an electromagnetic coil functional layer in the display device to generate and sense RF signals (Radio Frequency Signal, radio frequency signal), which increases the manufacturing cost of the display device. At the same time, some needs to simulate real writing needs and other needs to enhance interactive feedback, and it is also necessary to set a pressure-sensitive functional layer to achieve this. For example, as a display device with a pressure detection function, it is a common design solution to attach a pressure-sensitive functional layer to the touch module of the display device. Therefore, in order to meet the needs of users for different scenarios, it has become an urgent problem to ensure that the touch function, pressure detection function, and electromagnetic touch function of the display device work normally without setting too many film layer structures.

[0058] In view of this, an embodiment of the present disclosure provides a touch module, which includes a first electrode layer, a second electrode layer, a third electrode layer and a pressure-sensitive layer which are stacked. The first electrode layer and the second electrode layer constitute an electromagnetic coil functional layer, the pressure-sensitive layer is located between the second electrode layer and the third electrode layer, and the second electrode layer, the third electrode layer and the pressure-sensitive layer constitute a pressure-sensitive functional layer. In this way, the second electrode layer not only constitutes part of the electromagnetic coil functional layer, but also constitutes part of the pressure-sensitive functional layer, thereby reducing the steps of film preparation and deposition, which not only improves production efficiency, but also improves the integration of the touch module.

[0059] It should be noted that the stacked first electrode layer, second electrode layer, third electrode layer and piezoresistance layer mentioned in the embodiments of the present disclosure emphasize the stacked state of the first electrode layer, second electrode layer, third electrode layer and piezoresistance layer, and the focus is on explaining that multiple film layers are in a stacked combination form, and there is no clear limitation on the arrangement order of these film layers. On the premise that the piezoresistance layer is arranged between the second electrode layer and the third electrode layer, there are many different arrangements between the first electrode layer, the second electrode layer, the third electrode layer and the piezoresistance layer, which can be specifically referred to the description in the following embodiments, and will not be elaborated here.

[0060] In the following, the touch module and the display device according to at least one embodiment of the present disclosure are described in conjunction with the accompanying drawings. In addition, as shown in the accompanying drawings, in at least one embodiment of the present disclosure, a spatial rectangular coordinate system is established with the surface where the touch module is located as a reference to define the positions of each film layer in the touch module. In the spatial rectangular coordinate system, the X-axis and the Y-axis are parallel to the surface where the touch module is located, and the Z-axis is perpendicular to the surface where the touch module is located.

[0061] like Figure 1 , Figure 3 As shown, the touch module provided by at least one embodiment of the present disclosure includes a first electrode layer 110, a third electrode layer 130, a pressure-sensitive layer 151 and a second electrode layer 120 stacked in sequence, or, as shown in FIG. Figure 2 As shown, the touch module includes a second electrode layer 120, a pressure-sensitive layer 151, a first electrode layer 110 and a third electrode layer 130 which are stacked in sequence. In the above two types of touch modules with stacked designs, the first electrode layer 110 and the second electrode layer 120 constitute the electromagnetic coil functional layer 140, the pressure-sensitive layer 151 is located between the second electrode layer 120 and the third electrode layer 130, and the second electrode layer 120, the third electrode layer 130 and the pressure-sensitive layer 151 constitute the pressure-sensitive functional layer 150, and the second electrode layer 120 participates in the formation of the electromagnetic coil functional layer 140 and the pressure-sensitive functional layer 150 at the same time, which is conducive to integrating the pressure detection function and the electromagnetic touch function in the touch module without setting too many film layers.

[0062] The disclosed embodiments do not limit the parameters such as the thickness and material of the film layer in the touch module. For example, the materials of the first electrode layer 110, the second electrode layer 120 and the third electrode layer 130 are conductive materials such as metal materials, which can be metal elements such as copper, silver, aluminum, molybdenum, etc., or metal alloys such as titanium-aluminum-titanium alloy, copper-nickel alloy, molybdenum-aluminum-molybdenum alloy, etc. For example, the pressure-sensitive layer 151 can be a piezoelectric material or a piezoresistive material. For another example, in the case where the touch module includes a display function layer, the first electrode layer 110, the second electrode layer 120 and the third electrode layer 130 can be composed of a metal grid, and the metal grid is located in the pixel periphery in the display area of ​​the display function layer, that is, the non-luminous area in the display area, and the pressure-sensitive layer 151 can be a piezoelectric material such as an ink material, which is made by a coating process. In addition, the thickness parameters of different film layers can be limited according to the actual needs of the touch module, which will not be repeated here.

[0063] It should be noted that "titanium-aluminum-titanium alloy" means a film structure in which a titanium layer, an aluminum layer and a single titanium layer are stacked in sequence, and "molybdenum-aluminum-molybdenum alloy" means a film structure in which a molybdenum layer, an aluminum layer and a single molybdenum layer are stacked in sequence.

[0064] Based on the touch module in the above embodiment, the present disclosure then designs the structure of the electromagnetic coil functional layer 140 in the touch module, and the specific solution is as follows.

[0065] In a touch control module provided by an embodiment of the present disclosure, the first electrode layer 110 includes a first electromagnetic coil electrode 111 extending along a first direction, i.e., an X direction, and the first electromagnetic coil electrode 111 includes a plurality of first openings 112 extending along the X direction. The second electrode layer 120 includes a second electromagnetic coil electrode 121 extending along a second direction, i.e., a Y direction, and the second electromagnetic coil electrode 121 includes a plurality of second openings 122 extending along the Y direction, and the first direction and the second direction intersect, for example, the X direction and the Y direction are perpendicular.

[0066] In the touch control module provided in at least one embodiment of the present disclosure, the first opening 112 and the second opening 122 are U-shaped.

[0067] For example, Figure 3 , Figure 4 and Figure 5 As shown, the first electrode layer 110 includes a plurality of first electromagnetic coil electrodes 111, the second electrode layer 120 includes a plurality of second electromagnetic coil electrodes 121, and the first electromagnetic coil electrodes 111 and the second electromagnetic coil electrodes 121 constitute an electromagnetic coil functional layer 140. On the first electrode layer 110, the first electromagnetic coil electrodes 111 extend along the first direction, i.e., the X direction, and a U-shaped first opening 112 is provided between adjacent first electromagnetic coil electrodes 111. The plurality of first openings 112 are arranged in parallel in the second direction, i.e., the Y direction, and each first opening 112 extends in the first direction, i.e., the X direction, and the first direction is perpendicular to the second direction. The second electromagnetic coil electrodes 121 extend along the second direction, i.e., the Y direction, and a U-shaped second opening 122 is provided between adjacent second electromagnetic coil electrodes 121. The plurality of second openings 122 are arranged in parallel in the first direction, i.e., the X direction, and each second opening 122 extends in the second direction, i.e., the Y direction.

[0068] In the electromagnetic coil functional layer 140, the coil in the X direction, i.e., the first electromagnetic coil electrode 111, and the coil in the Y direction, i.e., the second electromagnetic coil electrode 121, play a vital role. Specifically, the first electromagnetic coil electrode 111 is more sensitive to changes in the electromagnetic signal in the horizontal direction, such as the X direction. When the electromagnetic pen moves in the X direction, the electrical signal induced in the first electromagnetic coil electrode 111 will change accordingly. By measuring and analyzing these changes, the position coordinates of the electromagnetic pen in the X direction can be determined. Similarly, the second electromagnetic coil electrode 121 is mainly sensitive to changes in the electromagnetic signal in the vertical direction, such as the Y direction. When the electromagnetic pen moves in the Y direction, the electrical signal in the second electromagnetic coil electrode 121 will change accordingly, so that the position of the electromagnetic pen in the Y direction can be determined. If the electromagnetic pen moves on the touch module, during the movement, the first electromagnetic coil electrode 111 will generate electrical signals of different strengths and phases as the position of the electromagnetic pen in the X direction changes, and the second electromagnetic coil electrode 121 will also have corresponding electrical signal changes due to the change in the position of the electromagnetic pen in the Y direction. By processing and calculating the corresponding electrical signals in the X direction and the Y direction, the coordinates of the electromagnetic pen in the X direction and the Y direction on the touch module can be accurately determined, thereby achieving accurate electromagnetic touch positioning.

[0069] Continue to refer to Figure 4 and Figure 5 It can be seen that the openings corresponding to the first electromagnetic coil electrode 111 and the second electromagnetic coil electrode 121 are respectively set to be U-shaped, that is, the shape of the first opening 112 is U-shaped, and the shape of the second opening 122 is U-shaped. Such a design can not only increase the interaction area between the first electromagnetic coil electrode 111 and the second electromagnetic coil electrode 121 and the external electromagnetic signal, and improve the sensitivity of electromagnetic touch, but also reduce the mutual inductance between the first electromagnetic coil electrode 111 and the second electromagnetic coil electrode 121, thereby reducing the signal interference between the two electromagnetic coil electrodes to avoid the occurrence of signal confusion and error problems.

[0070] It should be noted that the structures of the first electromagnetic coil electrode 111 and the second electromagnetic coil electrode 121 in the embodiment of the present disclosure are not limited to the above examples. Figure 3 , Figure 4 and Figure 5The integrated structure may also be a split structure including a plurality of electrode strips extending along the first direction or the second direction respectively through a connection structure. For example, in the first electrode layer 110, for the first opening 112 corresponding to the first electromagnetic coil electrode 111, the relative size and spacing of the first opening 112, and in the second electrode layer 120, for the second opening 122 corresponding to the second electromagnetic coil electrode 121, the relative size and spacing of the second opening 122 may be the same or different. In addition, the line width density of the first electromagnetic coil electrode 111 on the first electrode layer 110, the line width density of the second electromagnetic coil electrode 121 on the second electrode layer 120, and the relative size of the line width between the first electromagnetic coil electrode 111 or the second electromagnetic coil electrode 121 can be designed according to actual needs, and will not be elaborated here.

[0071] In addition to introducing the structure of the electromagnetic coil functional layer 140 , the embodiment of the present disclosure also designs the film layer structure constituting the pressure-sensitive functional layer 150 , and the specific scheme is as follows.

[0072] In the touch module provided by at least one embodiment of the present disclosure, the second electrode layer 120 includes a first pressure-sensitive electrode 152 , the third electrode layer 130 includes a second pressure-sensitive electrode 153 , and the first pressure-sensitive electrode 152 , the second pressure-sensitive electrode 153 and the pressure-sensitive layer 151 constitute a pressure-sensitive functional layer 150 .

[0073] For example, Figure 6 As shown, the second electrode layer 120 includes a plurality of second electromagnetic coil electrodes 121 and a first pressure-sensitive electrode 152. The second electromagnetic coil electrodes 121 and the first pressure-sensitive electrode 152 are arranged to share the second electrode layer 120, which can reduce the number of electrode layers in the touch module. Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, a second pressure-sensitive electrode 153 corresponding to the first pressure-sensitive electrode 152 is disposed on the third electrode layer 130 disposed opposite to the second electrode layer 120 , and the pressure-sensitive layer 151 is located between the first pressure-sensitive electrode 152 and the second pressure-sensitive electrode 153 , thereby forming a pressure-sensitive functional layer 150 .

[0074] Specifically, when there is no pressure, there is a certain initial electrical state such as a specific resistance value or capacitance value between the first pressure-sensitive electrode 152 and the second pressure-sensitive electrode 153. Taking the pressure-sensitive functional layer 150 as a capacitive structure as an example, when pressure is applied to the touch module, the pressure will cause the dielectric constant of the pressure-sensitive layer 151 to change, thereby causing the capacitance value formed between the first pressure-sensitive electrode 152 and the second pressure-sensitive electrode 153 to change, so as to sense the size, position and distribution of pressure.

[0075] Based on the above embodiments, in a touch module provided in one embodiment of the present disclosure, the second electrode layer 120 includes a plurality of second electromagnetic coil electrodes 121 and a plurality of first pressure-sensitive electrodes 152 , the plurality of second electromagnetic coil electrodes 121 are arranged at intervals, and the first pressure-sensitive electrodes 152 extend along the second direction and are located between adjacent second electromagnetic coil electrodes 121 .

[0076] For example, Figure 6 As shown, the second electrode layer 120 includes a plurality of second electromagnetic coil electrodes 121 arranged in parallel and spaced apart in the first direction, i.e., the X direction, each second electromagnetic coil electrode 121 extends in the second direction, i.e., the Y direction, and is formed with a U-shaped second opening 122, that is, the plurality of second electromagnetic coil electrodes 121 correspond to the plurality of second openings 122. A plurality of first pressure-sensitive electrodes 152 are provided, each of which extends along the second direction, i.e., the Y direction, and is located between two adjacent second electromagnetic coil electrodes 121.

[0077] Based on the above embodiments, in a touch module provided in another embodiment of the present disclosure, the second electromagnetic coil electrode 121 is reused as the first pressure-sensitive electrode 152. In this way, not only the complexity and cost of the manufacturing process of the touch module are reduced, but also the integration of the touch module is improved.

[0078] For example, Figure 5 As shown, the second electromagnetic coil electrode 121 in the second electrode layer 120 is reused as the first piezoresistance electrode 152, that is, the first piezoresistance electrode 152 extends in the second direction and is formed with a plurality of U-shaped second openings 122 extending along the second direction. The first piezoresistance electrode 152 may be an integrated structure or a split structure formed by electrode strips through a connection structure, and may be designed according to actual needs, which will not be described in detail here.

[0079] The present disclosure does not specifically limit the structure of the second pressure-sensitive electrode 153 that forms the pressure-sensitive functional layer 150 with the first pressure-sensitive electrode 152 and the pressure-sensitive layer 151 in the above-mentioned embodiment. Figure 7 , Figure 8 As shown, the entire surface of the third electrode layer 130 is used as the second pressure-sensitive electrode 153, or as shown in Fig. 9 , Fig.10 As shown, the third electrode layer 130 forms a plurality of second pressure-sensitive electrodes 153, and the plurality of second pressure-sensitive electrodes 153 are arranged in parallel in the second direction, i.e., the Y direction, and each pressure-sensitive electrode extends in the first direction, i.e., the X direction, or the second pressure-sensitive electrodes 153 are integrated with the touch function layer 160 corresponding to the touch module. This structure will be specifically introduced in the following embodiments and will not be elaborated here.

[0080] In addition to integrating the pressure-sensitive functional layer 150 and the electromagnetic coil functional layer 140 together, the embodiment of the present disclosure also integrates the touch functional layer 160 with the above functional layers. The specific solution is as follows.

[0081] In a touch control module provided by an embodiment of the present disclosure, the first electrode layer 110 and the third electrode layer 130 constitute a touch control function layer 160. The touch control function layer 160 includes a plurality of first touch control electrodes 161 arranged in parallel, a plurality of second touch control electrodes 162 arranged in parallel, and a plurality of bridge electrodes 163. The first touch control electrodes 161 and the second touch control electrodes 162 intersect with each other, and the first touch control electrodes 161 are disconnected into a plurality of first electrode blocks 161a at the intersection with the second touch control electrodes 162, and the first electrode blocks 161a disconnected from each other are electrically connected through the bridge electrodes 163.

[0082] For example, Fig.11 As shown, the touch module further includes a touch function layer 160, which includes a plurality of first touch electrodes 161 and a plurality of second touch electrodes 162 formed by at least part of the first electrode layer 110 and the third electrode layer 130, and a plurality of bridge electrodes 163. The plurality of first touch electrodes 161 and the plurality of second touch electrodes 162 are respectively in strip shape, insulated from each other and arranged crosswise with each other. Each first touch electrode 161 extends along the first direction, i.e., the X direction, and each second touch electrode 162 extends along the second direction, i.e., the Y direction. In this way, the plurality of first touch electrodes 161 and the plurality of second touch electrodes 162 intersect, i.e., the aforementioned "crosswise" arrangement. The first touch electrode 161 is disconnected into a plurality of first electrode blocks 161a at the intersection with the second touch electrode 162, and the first electrode blocks 161a of the first touch electrodes 161 that are disconnected from each other are electrically connected through the bridge electrode 163, i.e., two adjacent first electrode blocks 161a are electrically connected through the bridge electrode 163.

[0083] The multiple first touch electrodes 161 and the multiple second touch electrodes 162 in the embodiment of the present disclosure are used to realize touch detection. For example, the touch module is a mutual capacitance touch module, one of the first touch electrode 161 and the second touch electrode 162 can be a sensing electrode (Receive, RX), and the other can be a transmitting electrode (Transmit, TX), and the position where the first touch electrode 161 and the second touch electrode 162 intersect forms a capacitor, that is, the area where the sensing electrode and the transmitting electrode intersect can form a touch capacitor. A scanning signal is applied to the transmitting electrode. If the user's finger approaches the intersection, a parasitic capacitor will be formed between the sensing electrode or the transmitting electrode and the user's finger. The parasitic capacitor will cause the voltage of the touch capacitor to float, that is, the capacitance value of the touch capacitor formed at the intersection of the sensing electrode and the transmitting electrode will change. By detecting the sensing electrode whose voltage has changed, the position of the touch capacitor whose capacitance value has changed can be determined, and the touch position can be located, thereby realizing the function of capacitive touch.

[0084] Based on the above embodiments, the touch function layer 160 includes the above first touch electrode 161, the second touch electrode 162, the bridge electrode 163 and other structures and also includes an insulating layer 170. The insulating layer 170 can not only help each touch electrode signal to be independent and accurate, improve the accuracy of the touch function, but also reduce the impact of external interference on the touch signal and protect the touch electrode and other structures. The design scheme of setting the insulating layer 170 in the touch module is specifically introduced below.

[0085] In a touch control module provided in an embodiment of the present disclosure, the touch control module further includes an insulating layer 170 located between the first electrode layer 110 and the third electrode layer 130. The insulating layer 170 can be used for electrical insulation between adjacent electrode layers, and its material includes SiNx, SiOx, organic film, etc., or a combination of the above materials.

[0086] For example, Fig.12 As shown, the touch module includes a first electrode layer 110, an insulating layer 170, a third electrode layer 130, a pressure-sensitive layer 151 and a second electrode layer 120 which are stacked in sequence. Fig.13 As shown, the touch module includes a second electrode layer 120, a pressure-sensitive layer 151, a first electrode layer 110, an insulating layer 170 and a third electrode layer 130 which are stacked in sequence. The first electrode layer 110 and the third electrode layer 130 constitute a touch function layer 160, and the second electrode layer 120 and the third electrode layer 130 and the pressure-sensitive layer 151 located between the second electrode layer 120 and the third electrode layer 130 constitute a pressure-sensitive function layer 150. The first electrode layer 110 and the second electrode layer 120 constitute an electromagnetic coil function layer 140.

[0087] The following is a design scheme for different film layer positions in the touch module to design various electrode structures in various functional layers such as the touch functional layer 160 , the electromagnetic coil functional layer 140 and the pressure-sensitive functional layer 150 . The specific scheme is as follows.

[0088] In a touch control module provided by an embodiment of the present disclosure, the second electrode layer 120 is located on a side of the third electrode layer 130 away from the first electrode layer 110, the third electrode layer 130 includes a first touch control electrode 161 and a second touch control electrode 162, and the first electrode layer 110 includes a bridge electrode 163. The second electromagnetic coil electrode 121 is multiplexed as the first pressure-sensitive electrode 152. In a touch control module provided by at least one embodiment of the present disclosure, the first touch control electrode 161 and / or the second touch control electrode 162 are multiplexed as the second pressure-sensitive electrode 153.

[0089] For example, Fig.11 , Fig.12 and Fig.14 As shown, the touch module includes a first electrode layer 110, a second electrode layer 120, a third electrode layer 130, an insulating layer 170 and a pressure-sensitive layer 151. The insulating layer 170 is located between the first electrode layer 110 and the third electrode layer 130, the pressure-sensitive layer 151 is located on the side of the third electrode layer 130 away from the first electrode layer 110, and the second electrode layer 120 is located on the side of the pressure-sensitive layer 151 away from the first electrode layer 110. The first touch electrode 161 and the second touch electrode 162 in the touch function layer 160 are arranged in the same layer and are formed by part of the third electrode layer 130, and the bridge electrode 163 connecting the first electrode block 161a corresponding to the first touch electrode 161 is formed by part of the first electrode layer 110. The first electrode layer 110 forms a first electromagnetic coil electrode 111 with a U-shaped opening, the second electrode layer 120 corresponds to a second electromagnetic coil electrode 121 with a U-shaped opening, and the second electromagnetic coil electrode 121 formed by the second electrode layer 120 located on the side of the piezoresistance layer 151 away from the third electrode layer 130 is reused as the first piezoresistance electrode 152. At the same time, at least part of the electrode structure formed by the third electrode layer 130 located on the side of the piezoresistance layer 151 away from the second electrode layer 120, i.e., the first piezoresistance electrode 152, is reused as the second piezoresistance electrode 153. In this way, there is no need to add other membrane layers to form the first piezoresistance electrode 152, thereby reducing production costs.

[0090] Specifically, Fig.14 As shown, in the touch module, the first touch electrode 161 in the third electrode layer 130 is reused as the second pressure-sensitive electrode 153. Fig. 9 As shown, in the touch module, the second touch electrode 162 in the third electrode layer 130 is reused as the second pressure-sensitive electrode 153. Fig.15As shown, in the touch module, the first touch electrodes 161 and the second touch electrodes 162 in the third electrode layer 130 are reused as the second pressure-sensitive electrodes 153. The first touch electrodes 161 extending in the first direction, i.e., the X direction, and the second touch electrodes 162 extending in the second direction, i.e., the Y direction, in the touch function layer 160 are reused as the second pressure-sensitive electrodes 153, which can improve the sensitivity of the pressure-sensitive function layer.

[0091] It should be noted that the diagrams in the above examples only show the electrode structure in the pressure-sensitive functional layer 150, while the structure of the touch functional layer 160, the structure of the electromagnetic coil functional layer 140, and the signal connection relationship between the corresponding different electrodes in each functional layer are not shown in the above diagrams and embodiments. These can be designed according to actual needs and will not be elaborated here.

[0092] In a touch control module provided by an embodiment of the present disclosure, the first touch control electrode 161 includes a plurality of first electrode blocks 161a extending along a first direction, and the second touch control electrode 162 is a strip electrode extending along a second direction. Alternatively, the first touch control electrode 161 includes a plurality of first electrode blocks 161a extending along a first direction, and the second touch control electrode 162 includes a plurality of second electrode blocks 162a extending along a second direction, and the second electrode blocks 162a disconnected from each other are electrically connected through a connecting electrode 164, and the connecting electrode 164 is disposed in the same layer as the second touch control electrode 162.

[0093] In the touch control module provided by at least one embodiment of the present disclosure, the first electrode block 161 a and the second electrode block 162 a are in a rhombus shape.

[0094] For example, Fig.11 and Fig.15 As shown, in the touch module, in the third electrode layer 130 forming the touch electrode, the first touch electrode 161 is a block electrode extending along the first direction, that is, the X direction, that is, the first electrode block 161a, and the adjacent first electrode blocks 161a are electrically connected through the bridge electrode 163. The second touch electrode 162 is a plurality of strip electrodes arranged in parallel in the first direction, that is, the X direction, and extending along the second direction, that is, the Y direction. Specifically, the shapes of the orthographic projections of the first touch electrode 161 and the second touch electrode 162 on the pressure-sensitive layer 151 are respectively rectangular, and the rectangle corresponding to the second touch electrode 162 is strip-shaped, and its size is larger than the size of the rectangle corresponding to the first touch electrode 161.

[0095] For example, Fig.16As shown, in the touch module, in the third electrode layer 130 forming the touch electrodes, the first touch electrode 161 is a plurality of rhombus electrodes extending along the first direction, namely, the first electrode block 161a, and the second touch electrode 162 is a plurality of rhombus electrodes extending along the second direction, namely, the Y direction, namely, the second electrode block 162a, that is, the shapes of the first electrode block 161a and the second electrode block 162a are both rhombus-shaped. The bridge electrode 163 connecting the first electrode block 161a is formed by part of the first electrode layer 110, and the connecting electrode 164 connecting the second electrode block 162a is formed by part of the third electrode layer 130, that is, the connecting electrode 164 is arranged in the same layer as the second touch electrode 162.

[0096] It should be noted that the design of the first pressure-sensitive electrode 152 and the second pressure-sensitive electrode 153 in the touch module in the embodiment of the present disclosure is not limited to the structures in the above examples and diagrams. For example, the shapes corresponding to the first electrode block 161a and the second electrode block 162a are not limited to the rectangle or rhombus in the above examples, but can also be other polygons. For another example, regarding the second pressure-sensitive electrode 153, especially when only the first touch electrode 161 or the second touch electrode 162 is used as the second pressure-sensitive electrode 153, the spatial projection relationship between the first pressure-sensitive electrode 152 and the second pressure-sensitive electrode 153 can be designed according to actual needs, which will not be elaborated here.

[0097] In a touch control module provided in another embodiment of the present disclosure, the second electrode layer 120 is located on a side of the first electrode layer 110 away from the third electrode layer 130, the pressure-sensitive layer 151 is located on a side of the second electrode layer 120 facing the third electrode layer 130, the third electrode layer 130 includes a first touch control electrode 161 and a second touch control electrode 162, the first electrode layer 110 includes a bridge electrode 163, and the second electromagnetic coil electrode 121 is multiplexed as the first pressure-sensitive electrode 152. In the touch control module provided in at least one embodiment of the present disclosure, the first touch control electrode 161 and / or the second touch control electrode 162 are multiplexed as the second pressure-sensitive electrode 153.

[0098] For example, Fig.13 and Fig.17As shown, the touch module includes a first electrode layer 110, a second electrode layer 120, a third electrode layer 130, an insulating layer 170 and a pressure-sensitive layer 151. The pressure-sensitive layer 151 is located between the second electrode layer 120 and the first electrode layer 110, the insulating layer 170 is located on the side of the first electrode layer 110 away from the pressure-sensitive layer 151, and the third electrode layer 130 is located on the side of the insulating layer 170 away from the first electrode layer 110. The third electrode layer 130 includes a first touch electrode 161 and a second touch electrode 162, and the first electrode layer 110 located on the side of the insulating layer 170 away from the third electrode layer 130 includes a bridge electrode 163. The first electrode layer 110 includes a first electromagnetic coil electrode 111 with a U-shaped opening, and the second electrode layer 120 correspondingly includes a second electromagnetic coil electrode 121 with a U-shaped opening. The second electromagnetic coil electrode 121 located on the side of the pressure-sensitive layer 151 away from the first electrode layer 110 is multiplexed as the first pressure-sensitive electrode 152 , and the first touch electrode 161 and the second touch electrode 162 included in the third electrode layer 130 located on the top layer are multiplexed as the second pressure-sensitive electrode 153 .

[0099] In a touch control module provided in one embodiment of the present disclosure, the first touch control electrode 161 includes a plurality of first electrode blocks 161a extending along a first direction, the second touch control electrode 162 is a strip electrode extending along a second direction, and the orthographic projection of the first touch control electrode 161 on the first electrode layer 110 falls outside the first electromagnetic coil electrode 111. In a touch control module provided in at least one embodiment of the present disclosure, the orthographic projections of the first electrode block 161a and the bridge electrode 163 on the first electrode layer 110 fall within the first opening 112.

[0100] For example, Fig.11 , Fig.17 and Fig.18 As shown, in the touch control module, in the third electrode layer 130 forming the touch control electrode, the first touch control electrode 161 includes a plurality of first electrode blocks 161a extending along the X direction, and adjacent first electrode blocks 161a are electrically connected through the bridge electrode 163, and each first electrode block 161a and the first electromagnetic coil electrode 111 do not overlap in space, for example, the orthographic projection of the first electrode block 161a on the first electrode layer 110 falls within the first opening 112. The second touch control electrode 162 is a plurality of strip electrodes arranged in parallel in the X direction, and each second touch control electrode 162 extends in the Y direction.

[0101] It should be noted that the structure of the touch module in the embodiment of the present disclosure is not limited to the above examples. For example, the first touch electrode 161 or the second touch electrode 162 can be reused as the second pressure-sensitive electrode 153. For example, when the structure of the first electromagnetic coil electrode 111 is a plurality of U-shaped electrodes designed side by side, the first electrode block 161a, i.e., the positive projection of the first touch electrode 161 on the first electrode layer 110, can fall between adjacent first electromagnetic coil electrodes 111. For another example, the touch module can also include a protective layer, which is located at the top layer, such as Fig.12 As shown, the protective layer is located on the side of the second electrode layer 120 away from the pressure-sensitive layer 151, or, as shown in Fig.13 As shown, the protective layer is located on the side of the third electrode layer 130 away from the first electrode layer 110. The protective layer can protect the upper electrode layer, the second electrode layer 120 or the third electrode layer 130 from being scratched or corroded. The material of the protective layer includes SiNx, SiOx, an organic film, etc., or a combination of the above materials. All of the above can be designed according to actual conditions and will not be described in detail here.

[0102] The disclosed embodiments do not limit the working conditions of the touch module with electromagnetic touch, pressure detection, capacitive touch, etc. For example, the time division multiplexing (TDM) technology can be used to make the touch module work normally, which will not be described in detail here.

[0103] The present disclosure also provides a display device, which includes the touch module in the above embodiment, and the touch module is located on the display side of the display panel. The structure of the touch module can refer to the description of the above embodiment, and will not be repeated here.

[0104] In an embodiment of the present disclosure, the display device may be an organic light emitting diode display device, a liquid crystal display device, an electronic paper display device, or the like.

[0105] For example, the display device in the embodiments of the present disclosure may be any product or component with a display function, such as a television, a digital camera, a mobile phone, a watch, a tablet computer, a laptop computer, a navigator, or the like.

[0106] It should be noted that the embodiments of the present disclosure do not describe all structures of the above-mentioned display device. To realize the necessary functions of the display device, those skilled in the art may set other structures according to specific application scenarios.

[0107] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A touch module, characterized in that: It comprises a first electrode layer, a second electrode layer, a pressure-sensitive layer and a third electrode layer which are stacked, wherein: The first electrode layer and the second electrode layer constitute an electromagnetic coil functional layer, the piezoresistive layer is located between the second electrode layer and the third electrode layer, and the second electrode layer, the third electrode layer and the piezoresistive layer constitute a piezoresistive functional layer.

2. The touch module according to claim 1, characterized in that: The first electrode layer includes a plurality of first electromagnetic coil electrodes extending along a first direction, and a first opening extending along the first direction is formed between adjacent first electromagnetic coil electrodes; and The second electrode layer includes a plurality of second electromagnetic coil electrodes extending along a second direction, and a second opening extending along the second direction is provided between adjacent second electromagnetic coil electrodes, and the first direction and the second direction intersect; Preferably, the first opening and the second opening are both U-shaped.

3. The touch module according to claim 2, characterized in that: The second electrode layer includes a first pressure-sensitive electrode, the third electrode layer includes a second pressure-sensitive electrode, and the first pressure-sensitive electrode, the second pressure-sensitive electrode and the pressure-sensitive layer constitute the pressure-sensitive functional layer; Preferably, the second electrode layer includes a plurality of the second electromagnetic coil electrodes and a plurality of first pressure-sensitive electrodes, the plurality of the second electromagnetic coil electrodes are arranged at intervals, and the first pressure-sensitive electrodes extend along the second direction and are located between adjacent second electromagnetic coil electrodes; Preferably, the second electromagnetic coil electrode is reused as the first pressure-sensitive electrode.

4. The touch module according to claim 3, characterized in that: The first electrode layer and the third electrode layer constitute a touch function layer, and The touch function layer includes a plurality of parallel first touch electrodes, a plurality of parallel second touch electrodes and a plurality of bridge electrodes, the first touch electrodes and the second touch electrodes intersect each other, the first touch electrodes are disconnected into a plurality of first electrode blocks at the intersection with the second touch electrodes, and the first electrode blocks disconnected from each other are electrically connected through the bridge electrodes.

5. The touch module according to claim 4, characterized in that: An insulating layer is also included, wherein the insulating layer is located between the first electrode layer and the third electrode layer.

6. The touch module according to claim 5, characterized in that: The second electrode layer is located on a side of the third electrode layer away from the first electrode layer, the third electrode layer includes the first touch control electrode and the second touch control electrode, the first electrode layer includes the bridge electrode, and The second electromagnetic coil electrode is reused as the first pressure-sensitive electrode; Preferably, the first touch control electrode and / or the second touch control electrode are multiplexed as the second pressure-sensitive electrode.

7. The touch module according to claim 6, characterized in that: The first touch electrode includes a plurality of first electrode blocks extending along the first direction, and the second touch electrode is a strip electrode extending along the second direction; or, The first touch electrode includes a plurality of first electrode blocks extending along the first direction, and the second touch electrode includes a plurality of second electrode blocks extending along the second direction. The second electrode blocks disconnected from each other are electrically connected via a connecting electrode, and the connecting electrode is arranged in the same layer as the second touch electrode. Preferably, the first electrode block and the second electrode block are rhombus-shaped.

8. The touch module according to claim 5, characterized in that: The second electrode layer is located on a side of the first electrode layer away from the third electrode layer, the pressure-sensitive layer is located on a side of the second electrode layer facing the third electrode layer, the third electrode layer includes the first touch control electrode and the second touch control electrode, the first electrode layer includes the bridge electrode, and The second electromagnetic coil electrode is reused as the first pressure-sensitive electrode; Preferably, the first touch control electrode and / or the second touch control electrode are multiplexed as the second pressure-sensitive electrode.

9. The touch module according to claim 8, characterized in that: The first touch electrode includes a plurality of first electrode blocks extending along the first direction, the second touch electrode is a strip electrode extending along the second direction, and the orthographic projection of the first touch electrode on the first electrode layer falls outside the first electromagnetic coil electrode; Preferably, the orthographic projections of the first electrode block and the bridge electrode on the first electrode layer fall within the first opening.

10. A display device, characterized in that: The invention comprises a display panel and the touch module according to any one of claims 1 to 9, wherein the touch module is located on the display side of the display panel.

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