Touch panel and display device

Abstract

The invention provides a touch panel and a display device, the touch panel comprises a substrate, a touch layer and an excitation coil, the touch layer is arranged on the substrate, the touch layer comprises a touch area, and the touch area comprises at least one metal layer; the exciting coil at least partially surrounds the touch area, and at least part of the exciting coil and the at least one metal layer are arranged on the same layer; in other words, the exciting coil is arranged on the periphery of the touch area, induction current can be generated or enhanced in the touch pen, and therefore the electromagnetic induction effect between the touch panel and the electromagnetic pen can be enhanced.

Description

Technical Field

[0001] The present application belongs to the technical field of display devices, and in particular, relates to a touch panel and a display device. Background Art

[0002] The touch screen controlled by the electromagnetic pen (electromagnetic screen) achieves high-precision touch, natural and smooth writing experience and wide adaptability by combining electromagnetic resonance (EMR) technology with advanced touch panel technology, bringing revolutionary changes to many fields such as education, design, and meeting records.

[0003] However, the performance of current electromagnetic touch panels needs to be improved. Summary of the invention

[0004] The purpose of the present application is to provide a touch panel and a display device, aiming to solve the problem of low performance of display products in traditional technologies.

[0005] A first aspect of an embodiment of the present application provides a touch panel, comprising:

[0006] substrate;

[0007] A touch layer is disposed on the substrate, and the touch layer includes a touch area, and the touch area includes at least one metal layer;

[0008] An excitation coil, wherein the excitation coil at least partially surrounds the touch control area, and at least a portion of the excitation coil is disposed in the same layer as the at least one metal layer.

[0009] In some embodiments of the present application, a touch electrode is disposed in the touch area, and the touch electrode includes a plurality of first electrodes spaced apart along a first direction and a plurality of second electrodes spaced apart along a second direction, and the first direction and the second direction are arranged crosswise;

[0010] Preferably, the first electrode and the second electrode are respectively arranged in different metal layers; at least part of the excitation coil is arranged in the same layer as the first electrode and / or the second electrode;

[0011] Alternatively, the first electrode and the second electrode are both arranged in the same metal layer, and the first electrode is routed through a cross-bridge metal structure in another metal layer, and at least part of the excitation coil is arranged in the same layer as the cross-bridge metal structure.

[0012] In some embodiments of the present application, the touch electrodes are connected to signal leads, and the signal leads at least partially surround the touch area; the signal leads and at least a portion of the excitation coils are arranged in different metal layers.

[0013] In some embodiments of the present application, at least a portion of the orthographic projections of the excitation coils on the substrate are spaced apart from or partially overlapped with the orthographic projections of the signal leads on the substrate.

[0014] In some embodiments of the present application, at least part of the orthographic projection of the excitation coil on the substrate is spaced apart from the orthographic projection of the signal lead on the substrate, and the excitation coil is arranged on a side of the signal lead away from the touch area.

[0015] In some embodiments of the present application, an isolation structure is disposed on a side of the signal lead away from the touch area, and at least a portion of the excitation coil is disposed between the signal lead and the isolation structure.

[0016] In some embodiments of the present application, the touch panel further includes a ground line, and the isolation structure includes a first isolation column and a second isolation column that are spaced apart and arranged on a side of the signal lead away from the touch area;

[0017] A portion of the excitation coil overlaps with the first isolation column and the second isolation column, and a portion of the excitation coil extends between the isolation structure and the signal lead along a direction close to the signal lead, and the grounding wire is arranged between the excitation coil and the signal lead;

[0018] Alternatively, a portion of the excitation coil is overlapped with the first isolation column, and a portion of the excitation coil extends between the first isolation column and the signal lead along a direction close to the signal lead, the grounding wire is arranged on a side of the excitation coil away from the signal lead, and the grounding wire is overlapped with the second isolation column;

[0019] Alternatively, all of the excitation coils are arranged between the isolation structure and the signal lead, and the panel ground wire is arranged between the excitation coil and the isolation structure.

[0020] In some embodiments of the present application, the first electrode is a driving electrode, the signal lead includes a first lead for connecting the first electrode, and the excitation coil has a first portion disposed close to the first lead;

[0021] The touch panel also includes a first switch component, one side of which is connected to the first part, and the other side of which is used to selectively access an excitation signal or a first drive signal; when the first lead is accessed to a second drive signal, the first switch component is accessed to the first drive signal, and the first drive signal and the second drive signal are the same drive signal; and before the excitation coil forms an excitation current, the first switch component is accessed to the excitation signal.

[0022] In some embodiments of the present application, there are multiple signal leads, and the multiple signal leads include a first lead for connecting the first electrode and a second lead for connecting the second electrode;

[0023] Part of the first lead lines and part of the second lead lines extend along two opposite sides of the touch area respectively.

[0024] In some embodiments of the present application, there are multiple signal leads, the multiple signal leads are arranged at intervals, and the excitation coil is arranged between two adjacent signal leads.

[0025] In some embodiments of the present application, the plurality of signal leads include a first lead for connecting the first electrode and a second lead for connecting the second electrode; the excitation coil has a second portion disposed between the second lead and the third lead;

[0026] The touch panel also includes a second switch component, one side of which is connected to the second part, and the other side is used to selectively connect to an excitation signal or to ground; before the excitation coil forms an excitation current, the second switch component connects to the excitation signal; and when the second lead and the third lead are connected to a drive signal, the second switch component is grounded.

[0027] In some embodiments of the present application, the second portion is disposed between each group of adjacent second leads and third leads.

[0028] In some embodiments of the present application, the metal layer is at least one layer, and the metal layer is a touch signal sensing layer, and the metal layer is an electromagnetic signal sensing layer.

[0029] In some embodiments of the present application, the metal layer is set to at least two layers, and the metal layer includes a first sublayer and a second sublayer, the first sublayer is a touch signal sensing layer, and the second sublayer is an electromagnetic signal sensing layer; at least part of the excitation coil is set in the same layer as the first sublayer and / or the second sublayer.

[0030] In some embodiments of the present application, driving and sensing electrodes are arranged in the first sub-layer, and the driving electrodes and the sensing electrodes are arranged in the same layer or in different layers;

[0031] Row sensing electrodes and column sensing electrodes are arranged in the second sub-layer, and the row sensing electrodes and the column sensing electrodes are arranged in the same layer or in different layers.

[0032] In some embodiments of the present application, the excitation coil includes a first sub-coil and a second sub-coil connected in parallel, and the first sub-coil and the second sub-coil are respectively arranged in different metal layers;

[0033] Preferably, the first sub-coil and the second sub-coil are arranged to overlap.

[0034] In some embodiments of the present application, the line width of at least part of the excitation coils is greater than the line width of the signal leads disposed outside the touch control area.

[0035] In some embodiments of the present application, the excitation coil has a third portion and a fourth portion, the third portion is arranged closer to the signal lead than the fourth portion, and a line width of the third portion is smaller than a line width of the fourth portion.

[0036] In a second aspect, the present application further provides a display device, which includes the above-mentioned touch panel.

[0037] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: the above-mentioned touch panel and display device, the touch panel includes a substrate, a touch layer and an excitation coil, the touch layer is arranged on the substrate, and the touch layer includes a touch area, and the touch area includes at least one metal layer; the excitation coil at least partially surrounds the touch area, and at least part of the excitation coil is arranged in the same layer as the at least one metal layer; that is, by arranging the excitation coil on the periphery of the touch area, an induced current can be generated or enhanced in the stylus, which is beneficial to enhancing the electromagnetic induction effect between the touch panel and the electromagnetic pen. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A schematic diagram of the structure of a touch panel provided in one embodiment of the present application;

[0039] Figure 2 A schematic diagram of the structure of a touch panel provided in another embodiment of the present application;

[0040] Figure 3 A schematic diagram of the structure of a touch panel provided in yet another embodiment of the present application;

[0041] Figure 4 A schematic diagram of the structure of a touch panel provided in yet another embodiment of the present application;

[0042] Figure 5 A schematic diagram of the structure of a touch panel provided in yet another embodiment of the present application;

[0043] Figure 6 A schematic diagram of the structure of a touch panel provided in yet another embodiment of the present application;

[0044] Figure 7 A schematic diagram of the structure of a touch panel provided in yet another embodiment of the present application;

[0045] Figure 8 A schematic diagram of a partial structure of a touch panel provided in an embodiment of the present application;

[0046] Fig. 9 A schematic diagram of a partial structure of a touch panel provided in another embodiment of the present application;

[0047] Fig.10 A schematic diagram of a partial structure of a touch panel provided in yet another embodiment of the present application;

[0048] Fig.11 A schematic diagram of a partial structure of a touch panel provided in yet another embodiment of the present application;

[0049] Fig.12 A schematic diagram of a partial structure of a touch panel provided in yet another embodiment of the present application;

[0050] Fig.13 A schematic diagram of the circuit structure of a touch panel provided in one embodiment of the present application;

[0051] Fig.14 A schematic diagram of the structure of a touch panel provided in yet another embodiment of the present application;

[0052] Fig.15 A schematic diagram of the structure of a touch panel provided in yet another embodiment of the present application;

[0053] Fig.16 A schematic diagram of the structure of a touch panel provided in yet another embodiment of the present application;

[0054] Fig.17 A schematic diagram of the circuit structure of a touch panel provided in another embodiment of the present application;

[0055] Fig.18 A schematic diagram of the structure of a touch panel provided in another embodiment of the present application;

[0056] Fig.19 A schematic diagram of the structure of a touch panel provided in yet another embodiment of the present application;

[0057] Fig. 20 A schematic diagram of the structure of a touch panel provided in yet another embodiment of the present application;

[0058] Fig.21 This is a schematic diagram of the structure of a touch panel provided in another embodiment of the present application.

[0059] Explanation of the accompanying drawings: 100-touch layer, 110-metal layer, 111-touch area, 120-insulating layer, 200-excitation coil, 210-first sub-coil, 220-second sub-coil, 300-substrate, 400-touch electrode, 410-first electrode, 420-second electrode, 430-bridge metal structure, 500-signal lead, 510-first lead, 511-third part, 512-fourth part, 513-fifth part, 514-sixth part, 520-second lead, 600-isolation structure, 610-first isolation column, 620-second isolation column, 700-ground wire, 800-first switch component, 900-second switch component, a-first direction, b-second direction. DETAILED DESCRIPTION

[0060] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0061] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0062] It should be understood that the terms "length", "width", "up", "down", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0063] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0064] What you need to know is that the electromagnetic screen can accurately capture the movement trajectory of the electromagnetic pen on the screen and convert it into digital signals for storage and processing, thereby realizing various functions such as original handwriting, drawing, and annotation, greatly improving the user experience.

[0065] However, with the continuous advancement of technology and the increasing diversification of consumer needs, the current electromagnetic screen technology still faces many challenges. On the one hand, the electromagnetic screen needs to further improve the touch accuracy and writing fluency to meet the user's demand for higher quality writing and drawing experience. On the other hand, the durability and stability of the electromagnetic screen are also urgent issues to be solved, especially in long-term use and high-intensity touch scenarios, how to maintain the stability of the screen and extend its service life becomes the key.

[0066] In addition, with the popularization of smart devices and the development of Internet of Things technology, electromagnetic screens also need to have stronger compatibility and scalability to support more types of electromagnetic pens and touch operations, while achieving seamless connection and data sharing with other smart devices. These demands put forward higher requirements for the technical optimization of electromagnetic screens and also point out the direction for their future development. In related technologies, the touch panel can generate electromagnetic induction with the electromagnetic pen, thereby realizing the control of the touch panel by the electromagnetic pen. However, if the voltage of the electromagnetic pen is unstable or the power is off, the touch operation is prone to failure.

[0067] Based on this, the present application improves the related touch panels and display devices.

[0068] See also Figure 1 , Figure 1 The structure diagram of the touch panel provided by the present embodiment is shown. The touch panel of the present embodiment includes a substrate 300, a touch layer 100 and an excitation coil 200; the touch layer 100 is arranged on the substrate 300, and the touch layer 100 includes a touch area 111, and the touch area 111 includes at least one metal layer 110; the excitation coil 200 at least partially surrounds the touch area 111, and at least part of the excitation coil 200 is arranged in the same layer as the at least one metal layer 110.

[0069] It should be explained that the touch area 111 can receive external touch signals to implement touch operation of the touch panel. For a touch display panel, the touch area 111 usually also needs a display function, wherein a plurality of pixel units are arranged therein, and images or information are displayed by controlling the plurality of pixel units to emit light.

[0070] In the related art, when the voltage of the electromagnetic pen is unstable or the power is off, the touch operation is prone to failure. However, in the present application, on the one hand, by setting the excitation coil 200 on the periphery of the touch area 111, the induced current can be generated or enhanced, which is conducive to enhancing the electromagnetic induction effect between the touch panel and the electromagnetic pen; on the other hand, the excitation coil 200 is set on the same layer as at least one metal layer 110, which can avoid increasing the frame, thereby increasing the space occupancy rate and reducing the manufacturing cost.

[0071] In some embodiments of this application, please refer to Figure 2 , Figure 2 A schematic diagram of the structure of the touch panel provided in this embodiment is shown; a touch electrode 400 is arranged in the touch area 111 of this embodiment, and the touch electrode 400 includes a plurality of first electrodes 410 arranged at intervals along a first direction a and a plurality of second electrodes 420 arranged at intervals along a second direction b, and the first direction a and the second direction b are arranged crosswise.

[0072] It should be explained that, for the touch electrode, the first electrode 410 can be used as a driving electrode, and the second electrode 420 can be used as a sensing electrode to sense an external touch signal. Exemplarily, the touch signal can be a finger touch signal. For the electromagnetic induction electrode, the electromagnetic pen touch point can be located by detecting the capacitance change of two groups of electrodes (a plurality of first electrodes 410 form a group of electrodes, and a plurality of second electrodes 420 form another group of electrodes).

[0073] In some embodiments, the first electrode 410 and the second electrode 420 may be strip electrodes, or electrodes of other shapes such as diamond structures connected together. The number of the first electrode 410 and the second electrode 420 may be determined according to the size of the touch area 111 .

[0074] In some embodiments, the first electrode 410 and the second electrode 420 may be arranged in a grid structure to reduce resistance.

[0075] In some embodiments, please refer to Figure 2 , the first direction a and the second direction b of this embodiment are perpendicular to each other. Exemplarily, a plurality of first electrodes 410 are arranged along the first direction a, and a plurality of second electrodes 420 are arranged along the second direction b, and the coordinates of the electromagnetic touch point in the first direction and the second direction are respectively obtained to realize touch positioning.

[0076] In some embodiments, see Figure 3 , Figure 3 1 is a schematic diagram showing the structure of the display panel provided in this embodiment. The first electrode 410 and the second electrode 420 of this embodiment are respectively arranged in different metal layers 110. Figure 3As shown, at least part of the excitation coil 200 is arranged in the same layer as the second electrode 420. Alternatively, (not shown) at least part of the excitation coil 200 is arranged in the same layer as the first electrode 410. Alternatively, (not shown) part of the excitation coil 200 is arranged in the same layer as the first electrode 410, and part of the excitation coil 200 is arranged in the same layer as the second electrode 420.

[0077] In some embodiments, see Figure 4 , Figure 4 The structure schematic diagram of the display panel provided by this embodiment is shown. In this embodiment, an insulating layer 120 is provided between the metal layer 110 where the first electrode 410 is located and the metal layer 110 where the second electrode 420 is located, so as to separate the first electrode 410 from the second electrode 420 .

[0078] In some embodiments, see Figure 5 , Figure 5 The schematic diagram of the structure of the display panel provided by the present embodiment shows that the first electrode 410 and the second electrode 420 of the present embodiment are both arranged in the same metal layer 110, and the first electrode 410 is routed through the cross-bridge metal structure 430 in another metal layer 110, and at least part of the excitation coil 200 is arranged in the same layer as the cross-bridge metal structure 430.

[0079] In this embodiment, by disposing the excitation coil 200 and the touch electrode 400 in the same metal layer 110 , only one mask is required to complete the preparation of the excitation coil 200 and the touch electrode 400 , which is beneficial to shortening the production time and reducing the production cost.

[0080] In some examples of this application, please participate Figure 6 , Figure 6 The touch electrode 400 of this embodiment is connected to a signal lead 500 , and the signal lead 500 at least partially surrounds the touch area 111 ; the signal lead 500 and at least part of the excitation coil 200 are arranged in different metal layers 110 .

[0081] It is understandable that the signal lead 500 and at least part of the excitation coil 200 are arranged in different metal layers 110. This layered layout further reduces the interference between different circuit elements and improves the stability and performance of the overall circuit.

[0082] In this embodiment, by disposing the excitation coil 200 and the touch electrode 400 in the same metal layer 110 , only one mask is required to complete the preparation of the excitation coil 200 and the touch electrode 400 , which is beneficial to shortening the production time and reducing the production cost.

[0083] In some embodiments of this application, please continue to refer to Figure 6In this embodiment, at least a portion of the orthographic projection of the excitation coil 200 on the substrate 300 is spaced apart from the orthographic projection of the signal lead 500 on the substrate 300 .

[0084] It can be understood that by spacing the excitation coil 200 and the signal lead 500 , it is helpful to further reduce the capacitive coupling between the excitation coil 200 and the signal lead 500 .

[0085] In some embodiments, see Figure 7 , Figure 7 The structure diagram of the display panel provided by this embodiment is shown. In this embodiment, at least part of the orthographic projection of the excitation coil 200 on the substrate 300 is overlapped with the orthographic projection of the signal lead 500 on the substrate 300.

[0086] It can be understood that the partially overlapping arrangement of the excitation coil 200 and the signal lead 500 is beneficial to reducing the space occupied by the excitation coil 200 and the signal lead 500 in the first direction, thereby helping to reduce the overall frame size.

[0087] In some embodiments of this application, please continue to refer to Figure 6 In this embodiment, at least part of the orthographic projection of the excitation coil 200 on the substrate 300 is spaced apart from the orthographic projection of the signal lead 500 on the substrate 300 , and the excitation coil 200 is disposed on a side of the signal lead 500 away from the touch area 111 .

[0088] It is understandable that the excitation coil 200 is disposed on a side of the signal lead 500 away from the touch area 111 , which can reduce the interference of the excitation coil 200 on the touch electrode 400 .

[0089] In some embodiments of this application, please refer to Figure 8 , Figure 8 The schematic diagram of the structure of the partial display panel provided by this embodiment is shown. An isolation structure 600 is provided on the side of the signal lead 500 away from the touch area 111 of this embodiment, and at least part of the excitation coil 200 is provided between the signal lead 500 and the isolation structure 600. This is conducive to saving space of the overall structure.

[0090] In some embodiments, the isolation structure 600 may be a dam structure. The dam structure is a part of the touch panel frame and can be used to help isolate water and oxygen in the air to prevent organic materials in the touch panel from absorbing water.

[0091] In some embodiments of this application, please refer to Fig. 9 , Fig. 9The schematic diagram of the partial structure of the display panel provided by the present embodiment is shown. The touch panel of the present embodiment further includes a ground line 700 (TP GND). The isolation structure 600 includes a first isolation column 610 and a second isolation column 620 which are arranged at intervals on a side of the signal lead 500 away from the touch area 111. A portion of the partial excitation coil 200 is arranged overlapping with the first isolation column 610 and the second isolation column 620. The partial excitation coil 200 extends between the isolation structure 600 and the signal lead 500 in a direction close to the signal lead 500. The ground line 700 is arranged between the excitation coil 200 and the signal lead 500.

[0092] It should be explained that the presence of the grounding wire 700 provides a stable potential reference point for the touch panel, which helps to reduce electrostatic interference and electromagnetic radiation, thereby protecting the electronic components inside the panel from damage. A portion of the excitation coil 200 overlaps with the first isolation column 610 and the second isolation column 620, so that the space can be fully utilized, while another portion of the excitation coil 200 extends in a direction close to the signal lead 500 to between the isolation structure 600 and the signal lead 500, so that the excitation coil 200 can be more flexibly arranged inside the touch panel, while maintaining a certain distance from the signal lead 500 to avoid direct electromagnetic interference.

[0093] In the specific embodiment, please continue to refer to Fig. 9 , the excitation coil 200 and the grounding line 700 are arranged in the same metal layer. In another specific embodiment (not shown), the signal lead 500 and the grounding line 700 are arranged in the same metal layer 110 .

[0094] In some embodiments, see Fig.10 , Fig.10 A partial structural schematic diagram of a display panel provided in this embodiment is shown. In this embodiment, part of the excitation coil 200 is overlapped with the first isolation column 610, part of the excitation coil 200 extends between the first isolation column 610 and the signal lead 500 in a direction close to the signal lead 500, the grounding wire 700 is arranged on the side of the excitation coil 200 away from the signal lead 500, and the grounding wire 700 is overlapped with the second isolation column 620.

[0095] In the specific embodiment, please continue to refer to Fig.10 , the excitation coil 200 and the grounding line 700 are arranged in the same layer. In another specific embodiment (not shown), the signal lead 500 and the grounding line 700 are arranged in the same metal layer 110 .

[0096] In some embodiments, see Fig.11 , Fig.11The partial structural diagram of the display panel provided by this embodiment is shown. In this embodiment, the excitation coil 200 is completely arranged between the isolation structure 600 and the signal lead 500 , and the panel grounding wire 700 is arranged between the excitation coil 200 and the isolation structure 600 .

[0097] In the specific embodiment, please continue to refer to Fig.11 , the excitation coil 200 and the grounding line 700 are arranged in the same layer. In another specific embodiment (not shown), the signal lead 500 and the grounding line 700 are arranged in the same metal layer 110 .

[0098] In some embodiments of this application, please refer to Fig.12 and Fig.13 , Fig.12 FIG. 4 shows a schematic diagram of the structure of the touch panel provided in this embodiment. Fig.13 The circuit structure diagram of the touch panel provided in the present embodiment is shown. The first electrode 410 of the present embodiment is a driving electrode, the signal lead 500 includes a first lead 510 for connecting the first electrode 410, and the excitation coil 200 has a first portion arranged close to the first lead 510; the touch panel also includes a first switch component 800, one side of the first switch component 800 is connected to the first portion, and the other side of the first switch component 800 is used to selectively access the excitation signal or the first drive signal; when the first lead 510 is connected to the second drive signal, the first switch component 800 is connected to the first drive signal, and the first drive signal and the second drive signal are the same drive signal; and before the excitation coil 200 forms an excitation current, the first switch component 800 is connected to the excitation signal.

[0099] It should be explained that before the touch electrode 400 corresponding to the first lead 510 works, the first lead 510 will first be connected to the second drive signal. At this time, the first switch component 800 also connects the first drive signal, which is the same drive signal as the second drive signal, to the first part of the excitation coil 200, which is conducive to reducing the coupling between the first lead 510 and the peripheral ground wire 700. It can be understood that the same drive signal refers to the same drive signal. During the electromagnetic touch operation, the first switch component 800 connects the excitation signal to the first part of the excitation coil 200, which is conducive to realizing the excitation function of the excitation coil 200.

[0100] In some embodiments, the excitation signal may be a square wave or a sine wave of a certain frequency. Specifically, the frequency of the excitation signal may be greater than or equal to 100 kHz. Exemplarily, the frequency of the excitation signal may be selected from 500 kHz, 600 kHz, and 700 kHz. It is understood that the higher the frequency of the excitation signal, the shorter the period of the excitation signal, which is conducive to improving the accuracy of electromagnetic touch.

[0101] In some embodiments, Fig.13 As shown, the first switch component 800 may include two switches, one switch is arranged between the first drive signal access terminal and the first part, and the other switch is arranged between the excitation signal access terminal and the first part.

[0102] In some embodiments of this application, please refer to Fig.14 , Fig.14 The structure diagram of the display panel provided by the present embodiment is shown. In the present embodiment, there are multiple signal leads 500, and the multiple signal leads 500 include a first lead 510 for connecting the first electrode 410 and a second lead 520 for connecting the second electrode 420; part of the first lead 510 and part of the second lead 520 are respectively extended along the opposite sides of the touch area 111.

[0103] It needs to be explained that Fig.14 As shown in , the touch area 111 has an upper side and left and right sides. In the related art, a part of the second lead 520 on the upper side close to the left side is led out from the left side, and a part of the second lead 520 close to the right side is led out from the right side. In this way, there is a situation where the first lead 510 and the second lead 520 are coupled on both sides of the touch area 111. However, all the first leads 510 in the present application are led out from the left side or the right side, which is conducive to avoiding the coupling of the first lead 510 and the second lead 520 on the other side. In other words, the first lead 510 and the second lead 520 are led out along the left and right sides respectively, which is conducive to reducing the coupling between the first lead 510 and the second lead 520, and because the distance between the first lead 510 and the second lead 520 is enlarged, there is no need to set an isolation layer between the first lead 510 and the second lead 520, which is conducive to reducing the overall space. Alternatively, the line width of the excitation coil 200 can be increased by using the area where the isolation layer is originally set, which is conducive to reducing the resistance, increasing the signal amount of the excitation coil 200, and thus reducing power consumption. Exemplarily, the isolation layer may be a TP guard line.

[0104] In some embodiments of this application, please refer to Fig.15 , Fig.15 The structure diagram of the display panel provided by this embodiment is shown. In this embodiment, there are multiple signal leads 500, and the multiple signal leads 500 are arranged at intervals, and the excitation coil 200 is arranged between two adjacent signal leads 500.

[0105] In some embodiments, see Fig.16 , Fig.16 The structure diagram of the display panel provided by this embodiment is shown. An excitation coil 200 may be arranged between each two adjacent signal leads 500 of this embodiment, and multiple excitation coils 200 are connected in parallel, which is beneficial to reducing the resistance of the excitation coils 200.

[0106] In some embodiments of this application, please refer to Fig.17 , Fig.17 A schematic diagram of the circuit structure of the display panel provided in the present embodiment is shown, wherein the multiple signal leads 500 in the present embodiment include a first lead 510 for connecting the first electrode 410 and a second lead 520 for connecting the second electrode 420; the excitation coil 200 has a second portion arranged between the first lead 510 and the second lead 520; the touch panel also includes a second switch component 900, one side of the second switch component 900 is connected to the second portion, and the other side is used to selectively connect to the excitation signal or to the ground; before the excitation coil 200 forms an excitation current, the second switch component 900 is connected to the excitation signal; and when the first lead 510 and the second lead 520 are connected to the driving signal, the second switch component 900 is grounded.

[0107] It should be explained that before the first electrode 410 and the second electrode 420 work, one of the first lead 510 and the second lead 520 will first be connected to the driving signal. At this time, the second switch component 900 is grounded or fixed to the signal, and the signal of the excitation coil 200 is pulled down or fixed, so as to isolate the first lead 510 and the second lead 520 to avoid coupling between the first lead 510 and the second lead 520. In other words, the second part of the excitation coil 200 and the isolation layer can be reused to reduce the overall space occupation. During the electromagnetic touch operation, the second switch component 900 connects the excitation signal to the second part of the excitation coil 200, which is conducive to realizing the excitation function of the excitation coil 200.

[0108] In some embodiments, the display panel includes an inner protection line and an outer protection line, and a multi-turn excitation coil 200 is formed by multiplexing the inner protection line and the outer protection line.

[0109] In some embodiments, the excitation signal may be a square wave or a sine wave of a certain frequency. Specifically, the frequency of the excitation signal may be greater than or equal to 100 khz. Exemplarily, the frequency of the excitation signal may be selected from 500 khz, 600 khz, and 700 khz. It is understood that the higher the frequency of the excitation signal, the shorter the period of the excitation signal, which is conducive to improving the accuracy of electromagnetic touch.

[0110] In some embodiments, Fig.17 As shown, the second switch component 900 may include two switches, one switch is arranged between the ground terminal and the second part, and the other switch is arranged between the excitation signal access terminal and the second part.

[0111] In some embodiments of the present application, a second portion is provided between each group of adjacent first leads 510 and second leads 520. That is, more regions can be selected to provide the excitation coil 200 to reduce the resistance of the excitation coil 200. Alternatively, the second portion can be provided in more regions to reuse the second portion with the isolation layer, thereby increasing the number of turns of the excitation coil 200 to increase the excitation current.

[0112] In some embodiments of the present application, the metal layer 110 is at least one layer, and the metal layer 110 is a touch signal sensing layer, and the metal layer 110 is an electromagnetic signal sensing layer. In other words, the touch signal sensing layer and the electromagnetic signal sensing layer are reused.

[0113] Specifically, touch control may include capacitive touch and electromagnetic touch, and the present application mainly optimizes and improves the electromagnetic touch solution. For a touch panel with an electromagnetic touch function, its touch electrodes 400 need to be distributed on the touch area 111 to obtain the touch position information. Exemplarily, electromagnetic interaction can be performed between an electromagnetic pen and the touch electrode 400 to obtain the touch position of the electromagnetic pen. For a passive electromagnetic pen, the excitation coil 200 can provide the necessary induction current for the passive electromagnetic pen so that the touch electrode 400 can sense the position of the passive electromagnetic pen. For an active electromagnetic pen, the excitation coil 200 can enhance the induction current in the active electromagnetic pen, which is beneficial to improve the induction ability of the touch electrode 400 to the active electromagnetic pen, and thus is beneficial to increase the driving ability of the electromagnetic pen.

[0114] In some embodiments of the present application, the metal layer 110 is provided with at least two layers, and the metal layer 110 includes a first sublayer and a second sublayer, the first sublayer is a touch signal sensing layer, and the second sublayer is an electromagnetic signal sensing layer; at least part of the excitation coil 200 is provided in the same layer as the first sublayer and / or the second sublayer. In other words, the electromagnetic signal sensing layer and the touch signal sensing layer are provided separately.

[0115] It is understandable that the excitation coil 200 may be disposed in the same layer as the first sublayer or the second sublayer, or part of the excitation coil 200 may be disposed in the same layer as the first sublayer and part of the excitation coil 200 may be disposed in the same layer as the second sublayer.

[0116] In some embodiments, the excitation coil 200 is disposed in the metal layer 110 closer to the substrate 300 in the first sub-layer and the second sub-layer.

[0117] In some embodiments of the present application, driving and sensing electrodes and sensing electrodes are disposed in the first sublayer, and the driving electrodes and the sensing electrodes are disposed in the same layer or in different layers.

[0118] It is understandable that when the driving electrodes and the sensing electrodes are arranged in the same layer, the driving electrodes or the sensing electrodes are wired via the bridge metal structure 430. When the driving electrodes and the sensing electrodes are arranged in different layers, the driving electrodes and the sensing electrodes may be staggered.

[0119] In some embodiments, row sensing electrodes and column sensing electrodes are disposed in the second sublayer of this embodiment, and the row sensing electrodes and the column sensing electrodes are disposed in the same layer or in different layers.

[0120] It is understandable that when the row sensing electrodes and the column sensing electrodes are arranged in the same layer, the row sensing electrodes or the column sensing electrodes are wired via the bridge metal structure 430. When the row sensing electrodes and the column sensing electrodes are arranged in different layers, the row sensing electrodes and the column sensing electrodes may be arranged in a staggered manner.

[0121] In some embodiments of the present application, the excitation coil 200 includes a first sub-coil 210 and a second sub-coil 220 connected in parallel, and the first sub-coil 210 and the second sub-coil 220 are respectively disposed in different metal layers 110 .

[0122] In some embodiments, see Fig.18 , Fig.18 A schematic structural diagram of a display panel provided in this embodiment is shown, in which the first sub-coil 210 and the second sub-coil 220 are arranged overlapping.

[0123] It should be explained that by arranging the first sub-coil 210 and the second sub-coil 220 located in different metal layers 110 and connecting the first sub-coil 210 and the second sub-coil 220 in parallel, the resistance of the excitation coil 200 can be reduced as much as possible within a limited space, which is beneficial to improving the electromagnetic performance of the excitation coil 200.

[0124] In some embodiments of this application, please refer to Fig.19 , Fig.19 The schematic diagram of the structure of the display panel provided by this embodiment shows that the line width of at least part of the excitation coil 200 is greater than the line width of the signal lead 500 arranged outside the touch area 111. This is conducive to reducing the resistance of the excitation coil 200 and thus improving the excitation effect.

[0125] In some embodiments of the present application, the excitation coil 200 has a third portion 511 and a fourth portion 512 , the third portion 511 is arranged closer to the signal lead 500 than the fourth portion 512 , and the line width of the third portion 511 is smaller than the line width of the fourth portion 512 .

[0126] It should be explained that in areas where there is ample space, the line width of the excitation coil 200 in this area can be enlarged, which is beneficial to reducing the overall resistance of the excitation coil 200 and thus increasing the current of the excitation coil 200 .

[0127] In some embodiments, see Fig. 20 , Fig. 20 The schematic diagram of the structure of the touch panel provided by this embodiment is shown. In this embodiment, the line width of the fourth portion increases in a step-like manner along the direction away from the signal lead.

[0128] In some embodiments, see Fig.21 , Fig.21 The structure diagram of the touch panel provided in this embodiment is shown. In this embodiment, the excitation coil has a fifth portion 513 arranged on the upper side of the touch area and a sixth portion 514 arranged on the left or right side of the touch area. The line width of the fifth portion 513 is greater than that of the sixth portion 514.

[0129] Since the upper side of the touch area 111 only needs to run through the unidirectional signal lead 500 in the first electrode 410, however, the left or right side of the touch area 111 not only needs to run through the unidirectional signal lead 500 in the second electrode 420, but also needs to run through the signal lead 500 of the first electrode 410 extending from the upper side of the touch area 111. Therefore, compared with the left and right sides of the touch area 111, the distribution density of the signal lead 500 on the upper side is smaller, and there is more space for setting the excitation coil 200, so that the current of the excitation coil 200 can be increased by increasing the line width of the excitation coil 200 on the upper side.

[0130] Furthermore, in order to better implement the touch panel in any of the above embodiments, based on the above touch panel, the present application also provides a display device, which includes the above touch panel.

[0131] In some embodiments, the touch panel is a flexible OLED touch panel, a rigid OLED touch panel, an LCD touch panel, and a microLED touch panel.

[0132] In some embodiments, the structures of the touch layer and the excitation coil in the above touch panel can also be applied to structures such as cover glass, polarizer, transparent substrate, metal grid, etc.

[0133] In some embodiments, the display device may be a mobile phone, a tablet, a desktop computer, a laptop computer, a watch, a bracelet, etc.

[0134] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0135] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary embodiments of the present application.

[0136] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0137] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus help understand one or more embodiments of the invention, in the above description of the embodiments of this application, multiple features are sometimes combined into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0138] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A touch panel, characterized in that: include: substrate; A touch layer is disposed on the substrate, and the touch layer includes a touch area, and the touch area includes at least one metal layer; An excitation coil, wherein the excitation coil at least partially surrounds the touch control area, and at least a portion of the excitation coil is disposed in the same layer as the at least one metal layer.

2. The touch panel according to claim 1, characterized in that: Touch electrodes are arranged in the touch area, and the touch electrodes include a plurality of first electrodes arranged at intervals along a first direction and a plurality of second electrodes arranged at intervals along a second direction, and the first direction and the second direction are arranged crosswise; Preferably, the first electrode and the second electrode are respectively arranged in different metal layers; at least part of the excitation coil is arranged in the same layer as the first electrode and / or the second electrode; Alternatively, the first electrode and the second electrode are arranged in the same metal layer, and the first electrode is electrically connected through a bridge metal structure in another metal layer, and at least part of the excitation coil is arranged in the same layer as the bridge metal structure.

3. The touch panel according to claim 2, characterized in that: The touch electrodes are connected to signal leads, and the signal leads at least partially surround the touch area; the signal leads and at least a portion of the excitation coils are arranged in different metal layers.

4. The touch panel according to claim 3, characterized in that: At least part of the orthographic projection of the excitation coil on the substrate is arranged with a gap or partially overlaps with the orthographic projection of the signal lead on the substrate.

5. The touch panel according to claim 4, characterized in that: The orthographic projection of at least part of the excitation coil on the substrate is spaced apart from the orthographic projection of the signal lead on the substrate, and the excitation coil is arranged on a side of the signal lead away from the touch area.

6. The touch panel according to claim 5, characterized in that: An isolation structure is disposed on a side of the signal lead away from the touch area, and at least a portion of the excitation coil is disposed between the signal lead and the isolation structure.

7. The touch panel according to claim 6, characterized in that: The touch panel further includes a ground line, and the isolation structure includes a first isolation column and a second isolation column which are spaced apart and arranged on a side of the signal lead away from the touch area; A portion of the excitation coil overlaps with the first isolation column and the second isolation column, and a portion of the excitation coil extends between the isolation structure and the signal lead along a direction close to the signal lead, and the grounding wire is arranged between the excitation coil and the signal lead; Alternatively, a portion of the excitation coil is overlapped with the first isolation column, and a portion of the excitation coil extends between the first isolation column and the signal lead along a direction close to the signal lead, the grounding wire is arranged on a side of the excitation coil away from the signal lead, and the grounding wire is overlapped with the second isolation column; Alternatively, all of the excitation coils are arranged between the isolation structure and the signal lead, and the panel ground wire is arranged between the excitation coil and the isolation structure.

8. The touch panel according to claim 3, characterized in that: The first electrode is a driving electrode, the signal lead includes a first lead for connecting the first electrode, and the excitation coil has a first portion disposed close to the first lead; The touch panel further includes a first switch component, one side of which is connected to the first part, and the other side of which is used to selectively access an excitation signal or a first drive signal; when the first lead is connected to a second drive signal, the first switch component is connected to the first drive signal, and the first drive signal and the second drive signal are the same drive signal; And before the excitation coil forms an excitation current, the first switch component connects the excitation signal.

9. The touch panel according to claim 3, characterized in that: There are multiple signal leads, and the multiple signal leads include a first lead for connecting the first electrode and a second lead for connecting the second electrode; Part of the first lead lines and part of the second lead lines extend along two opposite sides of the touch area respectively.

10. The touch panel according to claim 3, characterized in that: There are multiple signal leads, which are arranged at intervals, and the excitation coil is arranged between two adjacent signal leads.

11. The touch panel according to claim 10, characterized in that: The plurality of signal leads include a first lead for connecting the first electrode and a second lead for connecting the second electrode; the excitation coil has a second portion disposed between the first lead and the second lead; The touch panel also includes a second switch component, one side of which is connected to the second part, and the other side is used to selectively connect to an excitation signal or to ground; before the excitation coil forms an excitation current, the second switch component connects to the excitation signal; and when the first lead and the second lead are connected to a drive signal, the second switch component is grounded.

12. The touch panel according to claim 11, characterized in that: The second portion is disposed between each group of adjacent first lead lines and second lead lines.

13. The touch panel according to any one of claims 1 to 12, characterized in that: The metal layer is at least one layer, and the metal layer is a touch signal sensing layer, and the metal layer is an electromagnetic signal sensing layer.

14. The touch panel according to any one of claims 1 to 12, characterized in that: The metal layer is set to at least two layers, and the metal layer includes a first sublayer and a second sublayer, the first sublayer is a touch signal sensing layer, and the second sublayer is an electromagnetic signal sensing layer; at least part of the excitation coil is set in the same layer as the first sublayer and / or the second sublayer.

15. The touch panel according to claim 14, characterized in that: Driving and sensing electrodes and sensing electrodes are arranged in the first sublayer, and the driving electrodes and the sensing electrodes are arranged in the same layer or in different layers; Row sensing electrodes and column sensing electrodes are arranged in the second sub-layer, and the row sensing electrodes and the column sensing electrodes are arranged in the same layer or in different layers.

16. The touch panel according to any one of claims 1 to 12, characterized in that: The excitation coil comprises a first sub-coil and a second sub-coil connected in parallel, and the first sub-coil and the second sub-coil are respectively arranged in different metal layers; Preferably, the first sub-coil and the second sub-coil are arranged to overlap.

17. The touch panel according to any one of claims 2 to 12, characterized in that: The line width of at least part of the excitation coils is greater than the line width of the signal leads arranged outside the touch control area.

18. The touch panel according to claim 17, characterized in that: The excitation coil has a third portion and a fourth portion, the third portion is arranged closer to the signal lead than the fourth portion, and a line width of the third portion is smaller than a line width of the fourth portion.

19. A display device, characterized in that: The display device comprises the touch panel according to any one of claims 1 to 18.

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