Touch panel and touch display device

Abstract

The invention discloses a touch panel and a touch display device.The touch panel comprises a first conductive layer, a second conductive layer, a supporting layer and a plurality of conductive protrusions; the supporting layer is filled between the first conductive layer and the second conductive layer; the plurality of conductive protrusions are arranged on at least one of the first conductive layer and the second conductive layer, and the conductive protrusions extend towards the supporting layer; in the non-pressed area, the supporting layer isolates the conductive protrusions from the conductive layer on the opposite side; at the pressed area, the supporting layer deforms, at least part of the conductive protrusions are configured to penetrate through the supporting layer, and the first conductive layer and the second conductive layer are electrically connected. The touch panel and the touch display equipment have the advantages that collapse is avoided, and user operation is facilitated.

Description

Technical Field

[0001] This application relates to the field of touch technology, and in particular to a touch panel and a touch display device. Background Technology

[0002] The touch portion of a resistive touchscreen is a multi-layer composite film. This multi-layer composite film includes two substrate layers spaced apart vertically, two conductive layers spaced apart vertically within the two substrate layers, and insulating particles spaced apart between the two conductive layers.

[0003] When the resistive touchscreen is subjected to pressure, a contact point appears between the two conductive layers at the point of pressure. Since one conductive layer is connected to a uniform 5V voltage field along the Y-axis, the controller can detect the voltage connected to the contact point along the Y-axis, perform an A / D conversion, and then compare the obtained voltage value with 5V to obtain the Y-axis coordinate of the contact point; similarly, the X-axis coordinate can be obtained. The X-axis is along the width of the resistive touchscreen, and the Y-axis is along the length of the resistive touchscreen. After calculating the (X, Y) coordinates of the contact point, the controller operates in a simulated mouse manner to complete the signal input.

[0004] However, the resistive touchscreens mentioned above require the user to apply considerable force to make the two conductive layers contact each other, which is inconvenient for users. Summary of the Invention

[0005] The purpose of this application is to provide a touch panel and a touch display device that can solve the problem of inconvenience for users.

[0006] To achieve the above objectives, one aspect of this application provides a touch panel, comprising: a first conductive layer; a second conductive layer, stacked on one side of the first conductive layer, with a gap between the second conductive layer and the first conductive layer; a support layer, filling the space between the first conductive layer and the second conductive layer; a plurality of conductive protrusions, disposed in at least one of the first conductive layer and the second conductive layer, with the conductive protrusions extending toward the support layer; in non-pressure areas, the support layer isolates the conductive protrusions from the conductive layer on the opposite side; in pressure areas, the support layer deforms, and at least a portion of the conductive protrusions are configured to penetrate the support layer and electrically connect the first conductive layer and the second conductive layer.

[0007] The touch panel provided in this application embodiment uses a support layer filled between the first conductive layer and the second conductive layer to maintain a certain distance between the first and second conductive layers in non-pressure areas, and to electrically isolate the first and second conductive layers in non-pressure areas to prevent collapse. Multiple conductive protrusions are provided in at least one of the first and second conductive layers, and the conductive protrusions in the pressure areas can penetrate the support layer and be electrically connected to the conductive layer on the opposite side. This shortens the distance that the first or second conductive layer needs to move in the pressure area, thereby reducing the deformation displacement of the first or second conductive layer, facilitating its recovery from deformation, and improving user operation. Furthermore, the contact area between the conductive protrusions and the support layer is smaller than the contact area between the first or second conductive layer and the support layer, making it easier for the conductive protrusions to penetrate the support layer and be electrically connected to the conductive layer on the opposite side, further facilitating user operation.

[0008] Optionally, when multiple conductive protrusions are disposed in the first conductive layer, the multiple conductive protrusions are spaced apart in the first conductive layer; or, when multiple conductive protrusions are disposed in the second conductive layer, the multiple conductive protrusions are spaced apart in the second conductive layer; or, when multiple conductive protrusions are disposed in both the first and second conductive layers, a portion of the multiple conductive protrusions are spaced apart in the first conductive layer, and another portion of the multiple conductive protrusions are spaced apart in the second conductive layer.

[0009] The above solution avoids the problem of large contact conduction area and inaccurate point location caused by multiple conductive protrusions being closely attached.

[0010] Optionally, the ratio of the spacing between two adjacent conductive bumps to the width of the conductive bump is greater than 10.

[0011] Optionally, the ratio of the spacing between two adjacent conductive bumps to the width of the conductive bump is less than 250.

[0012] The above solution aims to balance requirements for recognition accuracy, light transmittance, and display effect.

[0013] Optionally, the width of the conductive bump is no greater than 100 μm; and / or, the height of the conductive bump is less than 20 μm.

[0014] The above solutions are used to avoid affecting light transmittance and display effect.

[0015] Optionally, the conductive protrusion is tapered, with the tip of the conductive protrusion facing the support layer.

[0016] The above scheme facilitates the penetration of conductive protrusions into the support layer.

[0017] Optionally, the support layer is bonded between the first conductive layer and the second conductive layer.

[0018] The above method is used to prevent the first conductive layer from bulging.

[0019] Optionally, the support layer is doped with multiple conductive particles; in non-pressurized areas, the concentration of conductive particles is low, making the support layer doped with conductive particles in an insulating state; in pressurized areas, the concentration of conductive particles is high due to the compression of the support layer, making the support layer doped with conductive particles in a conductive state.

[0020] The above solution aims to reduce the force required to touch the screen and improve the sensitivity of the touch panel.

[0021] Optionally, the touch panel further includes: a first base layer, which is stacked on the side of the first conductive layer away from the second conductive layer and protects the first conductive layer; and a second base layer, which is stacked on the side of the second conductive layer away from the first conductive layer and supports the second conductive layer.

[0022] Optionally, the second base layer has an AG layer on the side opposite to the touch component.

[0023] The above solutions aim to reduce light reflection and improve visual effects from various angles.

[0024] To achieve the above objectives, another aspect of the embodiments of this application provides a touch display device, including a liquid crystal layer and a touch panel as described above, wherein the touch panel is connected to one side of the liquid crystal layer. Attached Figure Description

[0025] 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.

[0026] Figure 1 This is a schematic diagram of a resistive touchscreen based on related technologies.

[0027] Figure 2 This is a schematic diagram of a touch panel in the absence of touch, provided in an embodiment of this application.

[0028] Figure 3 for Figure 2 A partial schematic diagram of the touch panel is shown;

[0029] Figure 4 This is a schematic diagram of a touch panel in operation when touched, provided as an embodiment of this application.

[0030] Figure 5 for Figure 4 A partial schematic diagram of the touch panel is shown.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1000, Touch panel;

[0033] 100. Touch components;

[0034] 10. First conductive layer;

[0035] 20. Second conductive layer;

[0036] 30. Support layer;

[0037] 40. Conductive protrusions;

[0038] 200. The first level of grassroots;

[0039] 300. Second grassroots level;

[0040] 400. Double-sided adhesive layer;

[0041] 500, AG layer;

[0042] 2000, resistive touchscreen;

[0043] 2100, Lower substrate layer; 2200, Upper substrate layer; 2300, Lower conductive layer; 2400, Upper conductive layer; 2500, Insulating particles; 2600, Adhesive layer. Detailed Implementation

[0044] As described in the background section, the resistive touchscreens present problems that make them inconvenient for users. Figure 1 This is a schematic diagram of a resistive touchscreen based on related technologies. See below for reference. Figure 1 To describe the reason for this problem. For example Figure 1 As shown, the resistive touchscreen 2000 includes a lower substrate layer 2100, an upper substrate layer 2200, a lower conductive layer 2300, an upper conductive layer 2400, and multiple insulating particles 2500. The ends of the lower substrate layer 2100 and the upper substrate layer 2200 are connected by an adhesive layer 2600 to form a cavity. The lower conductive layer 2300 covers the side of the lower substrate layer 2100 facing the inner cavity, and the upper conductive layer 2400 covers the side of the upper substrate layer 2200 facing the inner cavity.

[0045] When the resistive touchscreen is not touched, the lower conductive layer 2300 and the upper conductive layer 2400 are supported by insulating particles 2500, and the distance between them is equal to the vertical height of the insulating particles 2500. When the resistive touchscreen 2000 is touched, the upper substrate layer 2200 and the upper conductive layer 2400 at the touch position will be subjected to force and will be recessed downwards. When the recessed upper conductive layer 2400 contacts the lower conductive layer 2300, the two are electrically connected. As can be seen from the above, the touch force applied by the object to the resistive touchscreen needs to make the vertical deformation of the upper conductive layer 2400 not less than the height of the insulating particles 2500 in order for the upper conductive layer 2400 to contact the lower conductive layer 2300.

[0046] The inventors of this application believe that the deformation of the upper conductive layer determines the magnitude of the touch force applied by the touch object. The height of the conductive particles determines the deformation of the upper conductive layer, and the distance between the upper and lower substrate layers determines the size of the conductive particles. However, the distance between the upper and lower substrate layers cannot be easily changed. Therefore, it is difficult to reduce the magnitude of the touch force required by the touch object using the existing structure. That is, the touch object needs to apply a large force to the existing resistive screen to make the upper and lower conductive layers contact at the touch position of the resistive screen, which is not conducive to user use.

[0047] Based on this, the inventors of this application have shifted their approach, using a support layer to fill the space between the first and second conductive layers, thereby maintaining a certain distance between them in non-pressure areas and preventing contact. Conductive protrusions are provided on at least one of the first and second conductive layers, extending towards the support layer. In pressure areas, the conductive protrusions can penetrate the support layer and electrically connect to the opposite conductive layer, thus electrically connecting the first and second conductive layers. Because the conductive protrusions have a certain length in the longitudinal direction, the deformation of the conductive layer under pressure is small in the longitudinal direction, requiring less force to be applied to the object touching it, which is beneficial for user operation.

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0049] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0050] Figure 2 This is a schematic diagram of a touch panel in the absence of touch, provided as an embodiment of this application. (Reference) Figure 2The touch panel (also known as a touch sensor) 1000 provided in this application embodiment may include a touch component 100, a first base layer 200, and a second base layer 300. The first base layer 200 and the second base layer 300 may be stacked, and there may be a gap between them. The touch component 100 may be disposed between the first base layer 200 and the second base layer 300.

[0051] The first base layer 200 is touchable by the user and also serves to protect the touch component. In other words, the surface of the first base layer 200 facing away from the touch component 100 can serve as the external operating surface of the touch panel 1000. When the user touches the operating surface, the user's touch force on the first base layer 200 can be transmitted to the touch component 100, and the touch component 100 can respond to the user's touch position. The first base layer 200 may be flexible to deform when touched by the user. The first base layer 200 can be a plate or a film. The material used to make the first base layer 200 can be: polycarbonate (PC), polymethyl methacrylate (PMMA), polyethersulfone (PES), cellulose ester, polyvinyl chloride (PVC), benzocyclobutene (BCB), acrylic resin, acrylonitrile-butadiene-styrene copolymer (ABS), polyethylene terephthalate (PET), polycarbonate / acrylonitrile-butadiene-styrene copolymer blend (PC / ABS), polycarbonate / polybutylene terephthalate blend (PC / PBT), polycarbonate / polyethylene terephthalate blend (PC / PET), polycarbonate / polymethyl methacrylate blend (PC / PMMA), or polyamide (PA), etc., which are materials with a certain degree of flexibility to bend under force and protect the touch component 100.

[0052] The surface of the second base layer 300 facing away from the touch component 100 can serve as the external connection surface of the touch panel 1000. This external connection surface of the touch panel 1000 can be attached to the surface of an object by adhesive. For example, the touch panel 1000 can be part of a touch display device and can be attached above the liquid crystal layer of the touch display device; or, for instance, the touch panel 1000 can be attached to the screen surface of the device and electrically connected to the device's motherboard to add touch functionality to the device.

[0053] In addition, the material used to make the second base layer 300 can be glass, diamond, plastic, or other materials with a certain degree of hardness. It should be noted that when the touch panel 1000 is used in a display device, both the first base layer 200 and the second substrate layer can be made of light-transmitting materials.

[0054] To connect the first base layer 200 and the second base layer 300, the touch panel 1000 provided in this embodiment may further include a double-sided adhesive layer 400. The double-sided adhesive layer 400 may be annular in shape and may have a certain thickness. Both sides of the double-sided adhesive layer 400 are adhesive to bond the outer periphery of the spaced-apart first base layer 200 to the outer periphery of the second base layer 300. The first base layer 200, the second base layer 300, and the double-sided adhesive layer 400 can be combined to form an accommodating space, in which the touch component 100 can be disposed.

[0055] When the touch panel 1000 is used in a display device, in order to reduce light reflection, an AG (Anti-glare) layer 500 can be provided on the side of the second base layer 300 opposite to the control panel to improve the visual effect from various angles. The AG layer 500 can be formed on the surface of the second base layer 300 by spraying, etching, coating, or other methods.

[0056] Figure 3 for Figure 2 A partial schematic diagram of the touch panel is shown. (Reference) Figure 2 and Figure 3 The touch component 100 may include a first conductive layer 10, a second conductive layer 20, a support layer 30, and a plurality of conductive protrusions 40. The first conductive layer 10 can be formed on the side of the first substrate layer facing the second substrate layer using methods such as vacuum evaporation, sputtering, chemical vapor deposition, ion plating, or spraying. Similarly, the second conductive layer 20 can also be formed on the side of the second substrate layer facing the first substrate layer using the aforementioned film-forming methods. Both the first conductive layer 10 and the second conductive layer 20 can be formed using conductive materials such as In₂O₃, TiO₂, SnO₂, or ZnO₂. Furthermore, in the touch panel 1000, as... Figure 2 and Figure 3 When not touched, the first conductive layer 10 and the second conductive layer 20 are spaced apart. Optionally, the spacing between the first conductive layer 10 and the second conductive layer 20 can be between 100µm and 600µm.

[0057] A support layer 30 can be filled between the first conductive layer 10 and the second conductive layer 20 to support the first conductive layer 10 and the second conductive layer 20, so that the first conductive layer 10 and the second conductive layer 20 are spaced apart in the non-pressure-bearing areas to prevent collapse. The non-pressure-bearing area is the opposite of the pressure-bearing area. The pressure-bearing area refers to the area where the touch component 100 deforms under pressure when a user touches the touch panel 1000 with a touch object. The non-pressure-bearing area refers to the area where the touch component 100 does not deform. In other words, when no touch object touches the touch panel 1000, the entire touch component 100 is a non-pressure-bearing area; when a touch object touches the touch panel 1000, the area deformed due to the touch is the pressure-bearing area, and the undeformed area is the non-pressure-bearing area.

[0058] The support layer 30 may be made of an insulating material so that the first conductive layer 10 and the second conductive layer 20 in the non-pressure area are separated by the support layer 30 and cannot conduct electricity. The support layer 30 may have a certain degree of elasticity so that it can deform with the deformation of the first base layer 200 and the first conductive layer 10 in the pressure area. In addition, the support layer 30 may have pores for the conductive protrusions 40 to pass through (e.g., the support layer 30 may be made of porous rubber, sponge, etc.), or the support layer 30 may have a high density to allow the conductive protrusions 40 to pass through (e.g., a high-density gel).

[0059] Optionally, to prevent the first base layer 200 and the first conductive layer 10 from bulging when the touch panel 1000 is large, the support layer 30 can be bonded between the first conductive layer 10 and the second conductive layer 20. For example, the opposite sides of the support layer 30 can be bonded to the first conductive layer 10 and the second conductive layer 20 respectively using conductive adhesive. For example, the support layer 30 can be formed by drying the adhesive to meet adhesion and density requirements. Furthermore, when the touch panel 1000 is used in a display device, the support layer 30 can be made of a light-transmitting material.

[0060] Multiple conductive protrusions 40 may be disposed in at least one of the first conductive layer 10 and the second conductive layer 20, and the conductive protrusions 40 may extend toward the support layer 30. For example, multiple conductive protrusions 40 may be disposed in the first conductive layer 10; or, multiple conductive protrusions 40 may be disposed as follows: Figure 2 and Figure 3 Alternatively, a portion of the plurality of conductive protrusions 40 may be disposed in the first conductive layer 10, and another portion of the plurality of conductive protrusions 40 may be disposed in the second conductive layer 20.

[0061] The conductive protrusion 40 can be connected to the first conductive layer 10 and / or the second conductive layer 20 via a conductive method such as printing. In non-pressure areas, the support layer 30 can isolate the conductive protrusion 40 from the conductive layer on the opposite side. For example, Figure 2 and Figure 3In one example, when the conductive protrusion 40 is disposed in the second conductive layer 20, the conductive protrusion 40 and the first conductive layer 10 are partially separated by the support layer 30. As another example, when the conductive protrusion 40 is disposed in the first conductive layer 10, the conductive protrusion 40 and the second conductive layer 20 are partially separated by the support layer 30. As yet another example, when a portion of the conductive protrusions 40 are disposed in the first conductive layer 10 and another portion of the conductive protrusions 40 are disposed in the second conductive layer 20, the conductive protrusions 40 disposed in different conductive layers are partially separated by the support layer 30.

[0062] Figure 4 This is a schematic diagram of a touch panel in operation when touched, provided in an embodiment of this application. Figure 5 for Figure 4 A partial schematic diagram of the touch panel is shown. (Reference) Figure 4 and Figure 5 When a touch object applies a touch force F to the touch panel 1000, a pressure area can be formed on the touch panel 1000. At the pressure area, the first base layer 200 and the first conductive layer 10 deform, thereby causing the support layer 30 to deform. For the purpose of visualizing the deformation, Figure 4 and Figure 5 The dashed line drawn in the middle represents the position of the surface of the first base layer 200 before deformation.

[0063] Continue to refer to Figure 4 and Figure 5 In the pressure-bearing area, at least a portion of the conductive protrusions 40 penetrate the support layer 30, electrically connecting the first conductive layer 10 and the second conductive layer 20. For example, Figure 4 and Figure 5 In the process, when the conductive protrusion 40 is disposed on the second conductive layer 20, the first conductive layer 10 in the pressure area sinks, and the support layer 30 in the pressure area deforms and becomes thinner. The conductive protrusion 40 disposed on the second conductive layer 20 can penetrate the support layer 30 and be electrically connected to the first conductive layer 10, thereby making the first conductive layer 10 and the second conductive layer 20 electrically connected at the touch area.

[0064] For another example, when the conductive protrusion 40 is disposed on the first conductive layer 10, the first conductive layer 10 in the pressure area sinks down, and the conductive protrusion 40 moves down as the first conductive layer 10 sinks down. The conductive protrusion 40 can pass through the support layer 30 and be electrically connected to the second conductive layer 20, thereby making the first conductive layer 10 and the second conductive layer 20 electrically connected at the touch area.

[0065] For another example, when a portion of the conductive protrusions 40 are disposed in the first conductive layer 10 and another portion of the conductive protrusions 40 are disposed in the second conductive layer 20, the first conductive layer 10 in the pressure area sinks, and the conductive protrusions 40 disposed in the first conductive layer 10 move downward as the first conductive layer 10 sinks. The conductive protrusions 40 disposed in the first conductive layer 10 can pass through the support layer 30 and can be electrically connected to the conductive protrusions 40 disposed in the second conductive layer 20 (here, the conductive protrusions 40 disposed in the first conductive layer 10 and the conductive protrusions 40 disposed in the second conductive layer 20 can be disposed opposite each other, that is, their orthographic projections can at least partially overlap); or, the conductive protrusions 40 disposed in the first conductive layer 10 can pass through the support layer 30 and be electrically connected to the second conductive layer 20 (here, the conductive protrusions 40 disposed in the first conductive layer 10 and the conductive protrusions 40 disposed in the second conductive layer 20 can be disposed alternately, that is, their orthographic projections do not overlap).

[0066] It should be noted that when the first conductive layer 10 and the second conductive layer 20 are electrically connected at the pressure-bearing region, the coordinates of the pressure-bearing region can be determined based on voltage changes. Specifically, the first conductive layer 10 and the second conductive layer 20 can be considered as a resistive network. If one of the first conductive layer 10 or the second conductive layer 20 is energized with voltage, a voltage gradient will be formed on the resistive network of that conductive layer. If a tactile force causes the first conductive layer 10 and the second conductive layer 20 to be electrically connected at the pressure-bearing region, the conductive layer that is not energized can measure the voltage at the pressure-bearing region, thereby determining the coordinates of the pressure-bearing region.

[0067] For example, when voltage is applied to the electrodes (X+, X-) of the first conductive layer 10, a voltage gradient is formed in the first conductive layer 10. When a touch force causes the first conductive layer 10 and the second conductive layer 20 to electrically connect at the pressure-bearing area, the voltage at the pressure-bearing area can be measured in the second conductive layer 20. Based on the distance between this voltage and the electrode (X+), the X-coordinate of that location can be determined. Then, when voltage is applied to the electrodes (Y+, Y-) of the second conductive layer 20, and the voltage at the pressure-bearing area is measured in the first conductive layer 10, the Y-coordinate of that location can be determined based on the distance between this voltage and the electrode (Y+).

[0068] In summary, the touch component 100 provided in this application embodiment uses a support layer 30 filled between the first conductive layer 10 and the second conductive layer 20 to maintain a certain distance between the first conductive layer 10 and the second conductive layer 20 in non-pressure areas, and to electrically isolate the first conductive layer 10 and the second conductive layer 20 in non-pressure areas, thereby preventing collapse and water vapor ingress. Furthermore, multiple conductive protrusions 40 are provided in at least one of the first conductive layer 10 and the second conductive layer 20, and the conductive protrusions 40 in the pressure areas can penetrate the support layer 30 and be electrically connected to the conductive layer on the opposite side. This shortens the distance that the first conductive layer 10 or the second conductive layer 20 needs to move in the pressure areas, thereby reducing the deformation displacement of the first conductive layer 10 or the second conductive layer 20, facilitating the recovery of the first conductive layer 10 or the second conductive layer 20 from deformation, and making it easier for the user to operate. In addition, the contact area between the conductive protrusion 40 and the support layer 30 is smaller than the contact area between the first conductive layer 10 or the second conductive layer 20 and the support layer 30, making it easier for the conductive protrusion 40 to penetrate the support layer 30 and connect electrically with the opposite conductive layer, which is beneficial for user operation.

[0069] To avoid the problem of inaccurate contact point finding caused by multiple conductive protrusions 40 being too close together, the multiple conductive protrusions 40 can optionally be spaced out. For example, Figure 4 and 5 In this case, when the conductive protrusion 40 is disposed in the second conductive layer 20, multiple conductive protrusions 40 can be disposed at intervals in the second conductive layer 20; as another example, when multiple conductive protrusions 40 are disposed in the first conductive layer 10, multiple conductive protrusions 40 can be disposed at intervals in the first conductive layer 10; as yet another example, when multiple conductive protrusions 40 are disposed in both the first conductive layer 10 and the second conductive layer 20, a portion of the multiple conductive protrusions 40 can be disposed at intervals in the first conductive layer 10, and another portion of the multiple conductive protrusions 40 can be disposed at intervals in the second conductive layer 20.

[0070] When the touch panel 1000 is used in a display device, to avoid the conductive protrusions 40 affecting its light transmittance and display effect, the conductive protrusions 40 can be made as small as possible. The inventors discovered that when the ratio of the distance between two adjacent conductive protrusions 40 to the width of the conductive protrusions 40 is between 10 and 250, both the requirements for recognition accuracy and light transmittance can be met. For example, the ratio can be 10, 30, 80, 90, 200, 250, etc.

[0071] Furthermore, the width of the conductive bumps 40 may not exceed 100µm. If the touch panel 1000 requires high precision, the conductive bumps 40 can be printed more densely, such as the spacing between two adjacent conductive bumps 40 being between 3mm and 8mm. If the touch panel 1000 requires less precision, the conductive bumps 40 can be printed more sparsely, such as the spacing between two adjacent conductive bumps 40 being between 9mm and 20mm.

[0072] Optionally, the spacing between the first conductive layer 10 and the second conductive layer 20 is generally between 100um and 600um. To avoid affecting light transmittance and display effect, the height of the conductive protrusion 40 can be less than 20um.

[0073] Optionally, to facilitate the conductive protrusion 40 passing through the support layer 30, the conductive protrusion 40 may be tapered, with its tip facing the support layer 30. For example, Figure 2 and Figure 3 In one example, when the conductive protrusion 40 is disposed on the second conductive layer 20, the support layer 30 is disposed above the second conductive layer 20, and the tip of the conductive protrusion 40 faces upward; in another example, when the conductive protrusion 40 is disposed on the first conductive layer 10, the support layer 30 is disposed below the second conductive layer 20, and the tip of the conductive protrusion 40 faces downward; in yet another example, when a portion of the conductive protrusions 40 are disposed on the first conductive layer 10 and another portion of the conductive protrusions 40 are disposed on the second conductive layer 20, the tips of the conductive protrusions 40 disposed on the first conductive layer 10 face downward, and the tips of the conductive protrusions 40 disposed on the second conductive layer 20 face upward.

[0074] The support layer 30 is insulating, requiring a relatively large tactile force for the conductive protrusion 40 in the touch area to pass through the support layer 30 and connect electrically with the opposite conductive layer. To reduce the tactile force, the support layer 30 can optionally be doped with multiple conductive particles. In non-pressurized areas, the concentration of conductive particles is low, making the doped support layer 30 insulating and thus isolating the first conductive layer 10 from the second conductive layer 20 in the non-pressurized areas. In pressurized areas, the concentration of conductive particles is high due to the compression of the support layer 30, making the doped support layer 30 conductive and thus connecting the first conductive layer 10 to the second conductive layer 20 in the pressurized areas. This reduces the required deformation of the first conductive layer 10 in the pressurized areas, thereby reducing the tactile force required and improving the device's sensitivity. Optionally, the diameter of the conductive particles is smaller than the width of the conductive protrusion 40.

[0075] This application also provides a touch display device, which may include a liquid crystal layer and a touch panel as mentioned above, wherein the touch panel may be stacked on one side of the liquid crystal layer. Optionally, the touch panel and the liquid crystal layer may be fixed together with adhesive.

[0076] The terms "upper" and "lower" are used to describe the relative positions of the various structures in the accompanying drawings. They are only for clarity of description and are not intended to limit the scope of implementation of this application. Any changes or adjustments to the relative positions without substantially altering the technical content shall also be considered within the scope of implementation of this application.

[0077] It should be noted that, in this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0078] Furthermore, in this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0079] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A touch panel, characterized in that, include: First conductive layer (10); A second conductive layer (20) is stacked on one side of the first conductive layer (10), and there is a gap between the second conductive layer (20) and the first conductive layer (10). A support layer (30) is filled between the first conductive layer (10) and the second conductive layer (20); Multiple conductive protrusions (40) are disposed in at least one of the first conductive layer (10) and the second conductive layer (20), and the conductive protrusions (40) extend toward the support layer (30); In non-pressured areas, the support layer (30) isolates the conductive protrusions (40) from the conductive layer on the opposite side; in pressured areas, the support layer (30) deforms, and at least a portion of the conductive protrusions (40) are configured to pass through the support layer (30) and electrically connect the first conductive layer (10) and the second conductive layer (20).

2. The touch panel according to claim 1, characterized in that, When the plurality of conductive protrusions (40) are disposed on the first conductive layer (10), the plurality of conductive protrusions (40) are disposed at intervals on the first conductive layer (10); Alternatively, when the plurality of conductive protrusions (40) are disposed on the second conductive layer (20), the plurality of conductive protrusions (40) are disposed at intervals on the second conductive layer (20); Alternatively, when the plurality of conductive protrusions (40) are disposed on the first conductive layer (10) and the second conductive layer (20), a portion of the plurality of conductive protrusions (40) are disposed at intervals on the first conductive layer (10), and another portion of the plurality of conductive protrusions (40) are disposed at intervals on the second conductive layer (20).

3. The touch panel according to claim 2, characterized in that, The ratio of the distance between two adjacent conductive protrusions (40) to the width of the conductive protrusion (40) is greater than 10.

4. The touch panel according to claim 3, characterized in that, The ratio of the spacing between two adjacent conductive protrusions (40) to the width of the conductive protrusion (40) is less than 250.

5. The touch panel according to claim 4, characterized in that, The width of the conductive protrusion (40) is not greater than 100 μm; and / or the height of the conductive protrusion (40) is less than 20 μm.

6. The touch panel according to any one of claims 1-5, characterized in that, The conductive protrusion (40) is tapered, with its tip pointing toward the support layer (30).

7. The touch panel according to any one of claims 1-5, characterized in that, The support layer (30) is bonded between the first conductive layer (10) and the second conductive layer (20); And / or, the support layer (30) is doped with a plurality of conductive particles; in the non-pressurized area, the concentration of conductive particles is low, so that the support layer (30) doped with conductive particles is in an insulating state; in the pressurized area, the concentration of conductive particles is high due to the compression of the support layer (30), so that the support layer (30) doped with conductive particles is in a conductive state.

8. The touch panel according to any one of claims 1-5, characterized in that, Also includes: The first base layer (200) is stacked on the side of the first conductive layer (10) away from the second conductive layer (20) and protects the first conductive layer (10); The second base layer (300) is stacked on the side of the second conductive layer (20) away from the first conductive layer (10) and supports the second conductive layer (20).

9. The touch panel according to claim 8, characterized in that, The second base layer (300) has an AG layer (500) on the side opposite to the second conductive layer (20).

10. A touch display device, characterized in that, It includes a liquid crystal layer and a touch panel as described in any one of claims 1-9, wherein the touch panel is stacked on one side of the liquid crystal layer.

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