Touch panel, touch panel driving method and display device

Abstract

The invention discloses a touch panel, a touch panel driving method and a display device. A substrate; the electromagnetic touch module comprises a first electromagnetic signal line, a second electromagnetic signal line and a plurality of electromagnetic coils arranged at intervals in the row direction and the column direction. The electromagnetic coils are arranged on the same layer, each electromagnetic coil is of an annular structure with an opening, each electromagnetic coil comprises a first end and a second end corresponding to the opening, the first electromagnetic signal line is electrically connected with the first ends of the electromagnetic coils located in the same row, and the second electromagnetic signal line is electrically connected with the second ends of the electromagnetic coils located in the same column. The first electromagnetic signal line and the second electromagnetic signal line are insulated from each other; the first electromagnetic signal line and the second electromagnetic signal line are electrically connected with the electromagnetic touch control chip. The size of a single electromagnetic coil is relatively smaller, the corresponding touch position recognition is more accurate, the electromagnetic coil can be conveniently integrated in the touch panel, the overall thickness of the touch panel is reduced, and the use performance of the touch panel is improved.

Description

Technical Field

[0001] This invention belongs to the field of electronic product technology, and particularly relates to a touch panel, a touch panel driving method, and a display device. Background Technology

[0002] With the advancement of technology, digital touch panels such as those used in smartphones and tablets are widely used, and the display screen is an indispensable human-computer interaction interface in these touch panels. OLED (Organic Light Emitting Diode) touch panels, for example, have advantages such as self-illumination, energy saving, flexibility, and good adaptability.

[0003] Currently, the common way to enable electromagnetic touch functionality in display panels is to add an electromagnetic coil layer inside or outside the display panel. However, this results in a larger overall thickness of the display panel and a more complex manufacturing process.

[0004] Due to the structural limitations of existing touch panels, their performance cannot meet the requirements.

[0005] Therefore, there is an urgent need for a new touch panel, a touch panel driving method, and a display device. Summary of the Invention

[0006] This invention provides a touch panel, a touch panel driving method, and a display device. The size of a single electromagnetic coil is relatively smaller, the corresponding touch position recognition is more accurate, and it is easy to integrate into the touch panel, thereby reducing the overall thickness of the touch panel and improving the performance of the touch panel.

[0007] In a first aspect, embodiments of the present invention provide a touch panel, comprising: a substrate; an electromagnetic touch module disposed on one side of the substrate, the electromagnetic touch module comprising a first electromagnetic signal line, a second electromagnetic signal line, and a plurality of electromagnetic coils arranged at intervals along a row direction and a column direction; wherein, each of the electromagnetic coils is disposed on the same layer, the electromagnetic coils are in the form of annular structures with openings, each electromagnetic coil includes a first end and a second end corresponding to the opening, the first electromagnetic signal line is electrically connected to the first end of each of the electromagnetic coils located in the same row, the second electromagnetic signal line is electrically connected to the second end of each of the electromagnetic coils located in the same column, the first electromagnetic signal line and the second electromagnetic signal line are insulated from each other; and an electromagnetic touch chip disposed on one side of the substrate, the first electromagnetic signal line and the second electromagnetic signal line being electrically connected to the electromagnetic touch chip respectively.

[0008] Secondly, embodiments of the present invention provide a touch panel driving method, comprising: an electromagnetic touch module including a driving state and a sensing state; in the driving state, a high-potential driving signal is transmitted to one of a first electromagnetic signal line and a second electromagnetic signal line through the electromagnetic touch chip of the touch panel, while the other is connected to a low-potential signal; in the sensing state, the first electromagnetic signal line and the second electromagnetic signal line receive sensing signals in a time-division manner, and the one of the first electromagnetic signal line and the second electromagnetic signal line that does not receive the sensing signal is connected to a low-potential signal.

[0009] Thirdly, embodiments of the present invention provide a display device including the touch panel in any of the above embodiments.

[0010] Compared with related technologies, the touch panel provided in this embodiment of the invention includes a substrate, an electromagnetic touch module, and an electromagnetic touch chip. In this embodiment, the electromagnetic coils of the electromagnetic touch module are arranged in an array. A first electromagnetic signal line is electrically connected to the first end of each electromagnetic coil located in the same row, and a second electromagnetic signal line is electrically connected to the second end of each electromagnetic coil located in the same column, so as to realize time-division driving and sensing of the electromagnetic coils in the row and column directions, thereby determining the touch position. The electromagnetic touch chip can be used to send electromagnetic signals to or receive electromagnetic signals from the electromagnetic coils. Since the size of a single electromagnetic coil is relatively smaller, the corresponding touch position recognition is more accurate, and it is easy to integrate into the touch panel, reducing the overall thickness of the touch panel and improving the performance of the touch panel. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the structure of a touch panel according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a touch panel according to another embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a touch panel according to another embodiment of the present invention; Figure 4 This is a schematic diagram showing the relative positions of the touch layer and the electromagnetic touch module according to an embodiment of the present invention; Figure 5 This is a schematic diagram showing the relative positions of an electromagnetic coil and a light-emitting unit according to an embodiment of the present invention; Figure 6This is provided by one embodiment of the present invention. Figure 4 Schematic diagram of the cross section at point AA; Figure 7 This is provided by one embodiment of the present invention. Figure 4 Schematic diagram of the cross section at the middle EE; Figure 8 This is provided by one embodiment of the present invention. Figure 4 Schematic diagram of the cross section at HH; Figure 9 This is provided by another embodiment of the present invention. Figure 4 Schematic diagram of the cross section at point AA; Figure 10 This is provided by another embodiment of the present invention. Figure 4 Schematic diagram of the cross section at the middle EE; Figure 11 This is a schematic diagram showing the relative positions of the touch layer and the electromagnetic touch module according to another embodiment of the present invention; Figure 12 This is provided by one embodiment of the present invention. Figure 11 Schematic diagram of the cross section at point BB; Figure 13 This is provided by another embodiment of the present invention. Figure 11 Schematic diagram of the cross section at point BB; Figure 14 This is provided by one embodiment of the present invention. Figure 11 Cross-sectional view at point CC; Figure 15 This is provided by one embodiment of the present invention. Figure 11 Schematic diagram of the cross section at point DD; Figure 16 This is a flowchart of a touch panel driving method provided in one embodiment of the present invention; Figure 17 This is a timing diagram corresponding to a touch panel driving method provided in one embodiment of the present invention.

[0013] Explanation of reference numerals in the attached figures: 100. Substrate; 200, Electromagnetic touch module; 210, First electromagnetic signal line; 220, Second electromagnetic signal line; 230, Electromagnetic coil; 23, Wiring trace; 300. Electromagnetic touch chip; 400. Electromagnetic pen; 50. Touch layer; 500. Touch electrode block; 510. First touch electrode block; 511. First extension; 512. Second extension; 513. First body part; 520. Second touch electrode block; 521. Third extension; 522. Fourth extension; 523. Second body part; 530. Virtual electrode block; K1, First bridge section; K2, Second bridge section; K3, Third bridge section; J1, First insulating layer; J2, Second insulating layer; F, Light-emitting unit; M1, First conductive layer; M2, Second conductive layer; M3, Third conductive layer; D1, First end; D2, Second end; Z1, First part; Z2, Second part; Z3, Third part; Z4, Fourth part; Z5, Second sub-part; Z6, First sub-part; X, Row direction; Y, Column direction. Detailed Implementation

[0014] The features and exemplary embodiments of various aspects of the present invention will now be described in detail. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention.

[0015] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0016] To better understand this invention, the following is combined with... Figures 1 to 17 The touch panel, touch panel driving method, and display device according to embodiments of the present invention will be described in detail.

[0017] Please refer to the following: Figures 1 to 2 , Figure 1 This is a schematic diagram of the structure of a touch panel according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a touch panel provided according to another embodiment of the present invention.

[0018] This invention provides a touch panel, comprising: a substrate 100; an electromagnetic touch module 200 disposed on one side of the substrate 100, the electromagnetic touch module 200 including a first electromagnetic signal line 210, a second electromagnetic signal line 220, and a plurality of electromagnetic coils 230 arranged at intervals along the row direction X and the column direction Y; wherein, each electromagnetic coil 230 is disposed on the same layer, the electromagnetic coil 230 has an open ring structure, and the electromagnetic coil 230 includes a first end D1 and a second end D2 corresponding to the opening, the first electromagnetic signal line 210 is electrically connected to the first end D1 of each electromagnetic coil 230 located in the same row, the second electromagnetic signal line 220 is electrically connected to the second end D2 of each electromagnetic coil 230 located in the same column, the first electromagnetic signal line 210 and the second electromagnetic signal line 220 are insulated from each other; and an electromagnetic touch chip 300 disposed on one side of the substrate 100, the first electromagnetic signal line 210 and the second electromagnetic signal line 220 being electrically connected to the electromagnetic touch chip 300 respectively.

[0019] The touch panel provided in this embodiment of the invention includes a substrate 100, an electromagnetic touch module 200, and an electromagnetic touch chip 300. In this embodiment, the electromagnetic coils 230 of the electromagnetic touch module 200 are arranged in an array. The first electromagnetic signal line 210 is electrically connected to the first end D1 of each electromagnetic coil 230 located in the same row, and the second electromagnetic signal line 220 is electrically connected to the second end D2 of each electromagnetic coil 230 located in the same column, so as to realize time-division driving and sensing of the electromagnetic coils 230 in the row direction X and column direction Y, thereby determining the touch position. The electromagnetic touch chip 300 can be used to send electromagnetic coils 230 or receive electromagnetic signals. Since the size of a single electromagnetic coil 230 is relatively smaller, the corresponding touch position recognition is more accurate, and it is easy to integrate into the touch panel, reducing the overall thickness of the touch panel and improving the performance of the touch panel.

[0020] When using an external device, such as an electromagnetic pen 400, to operate the touch panel, the electromagnetic pen 400 sends electromagnetic signals through its tip coil, and the electromagnetic coil 230 generates current signals through electromagnetic induction. The electromagnetic touch chip 300 senses the signals from the electromagnetic coil 230, calculates the electromagnetic signal quantities of different channels, and collects the electromagnetic signal distribution at different locations to determine the coordinates of the touch position of the electromagnetic pen 400.

[0021] It should be noted that the first electromagnetic signal line 210 and the second electromagnetic signal line 220 in this embodiment need to be insulated from each other to avoid signal interference. The first electromagnetic signal line 210 and the second electromagnetic signal line 220 can be arranged on the same layer as the electromagnetic coil 230, or they can be arranged on different layers to facilitate wiring.

[0022] Optionally, the electromagnetic coil 230 can be in the form of a rectangular ring structure with an opening, or a diamond ring structure, a circular ring structure, etc., which can be selected according to the shape and size of the touch panel, and there are no special limitations.

[0023] In this embodiment, the substrate 100 can be formed through processes such as coating, curing, and film formation. The substrate 100 can be a rigid substrate, such as a glass substrate; or it can be a flexible substrate, and its material can be polyimide, polystyrene, polyethylene terephthalate, poly(p-xylene), polyethersulfone, or polyethylene naphthalate. The substrate 100 is mainly used to support the devices disposed thereon.

[0024] Please see Figures 1 to 2 In some alternative embodiments, the opening of the electromagnetic coil 230 is located on the side of the electromagnetic coil 230 facing the electromagnetic touch chip 300.

[0025] It is understandable that, since the first electromagnetic signal line 210 and the second electromagnetic signal line 220 need to be electrically connected to the electromagnetic touch chip 300 respectively, and the opening of the electromagnetic coil 230 is set towards the electromagnetic touch chip 300, it is convenient for the first electromagnetic signal line 210 and the second electromagnetic signal line 220 to be connected to the corresponding first terminal D1 and second terminal D2, thereby reducing the length of the traces 23 of the first electromagnetic signal line 210 and the second electromagnetic signal line 220, thereby reducing the impedance and ensuring the touch effect.

[0026] Optionally, the electromagnetic coil 230 includes an annular structure segment, a first segment, and a second segment. The first segment and the second segment are respectively connected to the annular structure segment, and the first segment includes a first end D1 and the second segment includes a second end D2. The first segment and the second segment can extend along the column direction Y.

[0027] Please see Figure 3 , Figure 4 as well as Figure 7 , Figure 8 , Figure 3 This is a schematic diagram of the structure of a touch panel according to another embodiment of the present invention; Figure 4 This is a schematic diagram showing the relative positions of the touch layer 50 and the electromagnetic touch module 200 according to an embodiment of the present invention; Figure 7 This is provided by one embodiment of the present invention. Figure 4 Schematic diagram of the cross section at the middle EE; Figure 8 This is provided by one embodiment of the present invention. Figure 4 A cross-sectional view at point HH.

[0028] In some optional embodiments, a first conductive layer M1, a first insulating layer J1, and a second conductive layer M2 are sequentially provided along a direction away from the substrate 100; the first electromagnetic signal line 210, the second electromagnetic signal line 220, and the electromagnetic coil 230 are at least partially disposed in the same layer.

[0029] In this embodiment, two conductive layers, a first conductive layer M1 and a second conductive layer M2, are provided. The first electromagnetic signal line 210 and the second electromagnetic signal line 220 can be disposed on one of the layers, and the electromagnetic coil 230 can be disposed on the other layer for ease of arrangement. For example, the first electromagnetic signal line 210 and the second electromagnetic signal line 220 can be disposed on the first conductive layer M1, and the electromagnetic coil 230 can be disposed on the second conductive layer M2. The first electromagnetic signal line 210 and the second electromagnetic signal line 220 can be electrically connected to the electromagnetic coil 230 through vias disposed on the first insulating layer J1. Alternatively, considering that the first conductive layer M1 and the second conductive layer M2 may also be used to set other signal lines or electrodes, the first electromagnetic signal line 210, the second electromagnetic signal line 220, and the electromagnetic coil 230 can also be disposed on the same layer to improve space utilization, reduce the number of conductive layers required, and thus reduce the overall thickness of the touch panel.

[0030] Please see Figures 11 to 15 , Figure 11 This is a schematic diagram showing the relative positions of the touch layer 50 and the electromagnetic touch module 200 according to another embodiment of the present invention; Figure 12 This is provided by one embodiment of the present invention. Figure 11 Schematic diagram of the cross section at point BB; Figure 13 This is provided by another embodiment of the present invention. Figure 11 Schematic diagram of the cross section at point BB; Figure 14 This is provided by one embodiment of the present invention. Figure 11 Cross-sectional view at point CC; Figure 15 This is provided by one embodiment of the present invention. Figure 11 A cross-sectional view at point DD.

[0031] Optionally, the first electromagnetic signal line 210, the second electromagnetic signal line 220, and the electromagnetic coil 230 are all disposed on the first conductive layer M1; the first electromagnetic signal lines 210 that are connected to different electromagnetic coils 230 along the row direction X are connected by a first bridge portion K1 disposed on the second conductive layer M2, and the orthographic projection of the first bridge portion K1 on the substrate 100 and the orthographic projection of the second electromagnetic signal line 220 on the substrate 100 at least partially overlap.

[0032] It should be noted that since the first electromagnetic signal line 210 and the second electromagnetic signal line 220 need to be insulated from each other, when the first electromagnetic signal line 210 and the second electromagnetic signal line 220 are simultaneously provided on the first conductive layer M1, the first electromagnetic signal line 210 and the second electromagnetic signal line 220 will interfere with each other. This can be achieved by providing a first bridging portion K1 on the second conductive layer M2 so that the first electromagnetic signal line 210 avoids the second electromagnetic signal line 220. The orthographic projection of the first bridging portion K1 on the substrate 100 and the orthographic projection of the second electromagnetic signal line on the substrate 100 at least partially overlap, that is, the position of the first bridging portion K1 corresponds to the position of the second electromagnetic signal line 220 that needs to be avoided.

[0033] Please see Figure 4 as well as Figure 6 , Figure 6 This is provided by one embodiment of the present invention. Figure 4 A cross-sectional view at point AA; alternatively, the second electromagnetic signal line 220 can be bridged to avoid the first electromagnetic signal line 210. For example, the first electromagnetic signal lines 210 that correspond to different electromagnetic coils 230 along the column direction Y are connected by a second bridge portion K2 provided on the second conductive layer M2, and the orthographic projection of the second bridge portion K2 on the substrate 100 and the orthographic projection of the first electromagnetic signal line 210 on the substrate 100 at least partially overlap.

[0034] By providing a second bridge portion K2 in the second conductive layer M2, the second electromagnetic signal line 220 avoids the first electromagnetic signal line 210. The orthographic projection of the second bridge portion K2 on the substrate 100 and the orthographic projection of the first electromagnetic signal line on the substrate 100 at least partially overlap, that is, the position of the second bridge portion K2 corresponds to the position of the first electromagnetic signal line 210 that needs to be avoided.

[0035] Please see Figure 5 , Figure 5 This is a schematic diagram showing the relative positions of an electromagnetic coil 230 and a light-emitting unit F according to an embodiment of the present invention. Optionally, the electromagnetic coil 230 may include a grid-like wiring 23, and the touch panel includes a light-emitting unit F disposed between the substrate 100 and the electromagnetic touch module 200. The orthogonal projection of the wiring 23 on the substrate 100 is at least partially arranged around the orthogonal projection of the light-emitting unit F on the substrate 100 to avoid affecting the light emission of the light-emitting unit F. Multiple wirings 23 are connected in parallel to form an electromagnetic coil 230 to reduce the impedance of the electromagnetic coil 230.

[0036] Please see Figure 3 , Figure 4 as well as Figure 6 , Figure 7In some optional embodiments, the touch panel further includes a touch layer 50, which is at least partially disposed on the second conductive layer M2. The touch layer 50 includes touch electrode blocks 500, and the orthographic projection of the touch electrode blocks 500 on the substrate 100 and the orthographic projections of the first bridge portion K1 and the second bridge portion K2 on the substrate 100 do not overlap.

[0037] It should be noted that, in this embodiment, the touch panel can integrate the touch layer 50 for capacitive touch and the electromagnetic touch module 200 for electromagnetic touch. The touch layer 50 can be arranged using the second conductive layer M2, and the electromagnetic touch module 200 can be arranged using the first conductive layer M1. That is, it is set using the conductive layer of the touch panel itself, without the need for an additional external electromagnetic touch module 200, which effectively reduces the overall thickness of the touch panel.

[0038] In this embodiment, since the first bridge portion K1 and the second bridge portion K2 are also disposed on the second conductive layer M2, the touch electrode block 500 located on the second conductive layer M2 needs to avoid the first bridge portion K1 and the second bridge portion K2. That is, the orthographic projection of the touch electrode block 500 on the substrate 100 and the orthographic projection of the first bridge portion K1 and the second bridge portion K2 on the substrate 100 do not overlap, so as to avoid mutual interference between the touch electrode block 500 and the first bridge portion K1 and the second bridge portion K2.

[0039] It should be noted that the touch electrode block 500 in this embodiment can be either a mutual capacitance touch electrode block 500 or a self-capacitance touch electrode block 500, with no particular limitation. It can be selected according to actual needs, as long as it does not interfere with the electromagnetic touch module 200. The specific shape, size, and arrangement of the touch electrode block 500 can be set according to actual needs.

[0040] Optionally, the touch electrode block 500 can be a mutual capacitance touch electrode block 500, that is, the touch electrode block 500 can include a first touch electrode block 510 and a second touch electrode block 520. One of the first touch electrode block 510 and the second touch electrode block 520 is a touch driving electrode for receiving touch driving signals from the touch chip, and the other is a touch sensing electrode for feeding back touch sensing signals to the touch chip (not shown in the figure). The touch position is determined by detecting the capacitance change between the first touch electrode block 510 and the second touch electrode block 520, thereby realizing the touch function of the display panel.

[0041] Please see Figure 3 , Figure 4Optionally, along the row direction X, adjacent first touch electrode blocks 510 are electrically connected, and adjacent second touch electrode blocks 520 are mutually insulated. Along the column direction Y, adjacent second touch electrode blocks 520 are electrically connected, and adjacent first touch electrode blocks 510 are mutually insulated. The first touch electrode block 510 includes a first body portion 513 and a first extension portion 511 extending along a first direction and a second extension portion 512 extending along a second direction connected to the first body portion 513. The second touch electrode block 520 includes a second body portion 523 and a third extension portion 521 extending along a first direction and a fourth extension portion 522 extending along a second direction connected to the second body portion 523. The third sub-part is located between adjacent first sub-parts Z6, and the fourth sub-part is located between adjacent second sub-parts Z5. The first direction and the second direction intersect, and both intersect with the row direction X and the column direction Y, respectively.

[0042] Optionally, along the column direction Y, the second touch electrode block 520 includes a first part Z1 and a second part Z2 spaced apart, and the first part Z1 and the second part Z2 are connected by a third bridge part K3.

[0043] Optionally, the angle between the first direction and the row direction X and the column direction Y is 45°, and the angle between the second direction and the row direction X and the column direction Y is 45°.

[0044] Please see Figure 9 , Figure 10 , Figure 9 This is provided by another embodiment of the present invention. Figure 4 Schematic diagram of the cross section at point AA; Figure 10 This is provided by another embodiment of the present invention. Figure 4 A cross-sectional view at EE; in some optional embodiments, a first conductive layer M1, a first insulating layer J1, a second conductive layer M2, a second insulating layer J2, and a third conductive layer M3 are sequentially provided along the direction away from the substrate 100; a first electromagnetic signal line 210, a second electromagnetic signal line 220, and an electromagnetic coil 230 are disposed in at least one of the first conductive layer M1 and the second conductive layer M2; the touch panel also includes a touch layer 50, which is at least partially disposed in the third conductive layer M3.

[0045] In this embodiment, since three conductive layers—a first conductive layer M1, a second conductive layer M2, and a third conductive layer M3—are provided, the wiring space is larger than in the embodiment with two conductive layers. Therefore, the first electromagnetic signal line 210, the second electromagnetic signal line 220, and the electromagnetic coil 230 can be disposed in at least one of the first conductive layer M1 and the second conductive layer M2. For example, the first electromagnetic signal line 210 and the second electromagnetic signal line 220 can be disposed in the first conductive layer M1, and the electromagnetic coil 230 can be disposed in the second conductive layer M2. That is, the first electromagnetic signal line 210, the second electromagnetic signal line 220, and the electromagnetic coil 230 can be disposed in layers to avoid mutual interference.

[0046] Meanwhile, the touch layer 50 may be at least partially disposed on the third conductive layer M3. For example, the touch layer 50 includes a first touch electrode block 510 and a second touch electrode block 520 that are insulated from each other. The first touch electrode block 510 and the second touch electrode block 520 are disposed on the third conductive layer M3. Along the row direction X, adjacent first touch electrode blocks 510 are connected by a third bridge portion K3 disposed on the second conductive layer M2. Alternatively, along the column direction Y, adjacent second touch electrode blocks 520 are connected by a fourth bridge portion (not shown in the figure) disposed on the second conductive layer M2 to avoid interference between the first touch electrode blocks 510 and the second touch electrode blocks 520.

[0047] Please see Figure 12 In some optional embodiments, the first electromagnetic signal line 210 and the second electromagnetic signal line 220 are disposed on the first conductive layer M1, and the electromagnetic coil 230 is disposed on the second conductive layer M2; the first electromagnetic signal lines 210 that correspond to different electromagnetic coils 230 along the row direction X are connected by a first bridge portion K1 disposed on the second conductive layer M2, and the orthographic projection of the first bridge portion K1 on the substrate 100 and the orthographic projection of the second electromagnetic signal line 220 on the substrate 100 at least partially overlap.

[0048] In this embodiment, the first bridge section K1 and the electromagnetic coil 230 can be disposed together on the second conductive layer M2, and the two need to be separated and insulated to avoid short circuit.

[0049] By providing a first bridge portion K1 in the second conductive layer M2, the first electromagnetic signal line 210 avoids the second electromagnetic signal line 220. The orthographic projection of the first bridge portion K1 on the substrate 100 and the orthographic projection of the second electromagnetic signal on the substrate 100 at least partially overlap, that is, the position of the first bridge portion K1 corresponds to the position of the second electromagnetic signal line 220 that needs to be avoided.

[0050] Since the first touch electrode block 510 and the second touch electrode block 520 of the touch layer 50 are located on the third conductive layer M3, and the first electromagnetic signal line 210, the second electromagnetic signal line 220 and the electromagnetic coil 230 in the electromagnetic touch module 200 are located on the first conductive layer M1 or the second conductive layer M2, the touch layer 50 and the electromagnetic touch module 200 do not interfere with each other and can realize the capacitive touch and electromagnetic touch functions of the touch panel respectively.

[0051] Please see Figure 6 Optionally, the first electromagnetic signal lines 210 that correspond to different electromagnetic coils 230 along the column direction Y are connected by a second bridge portion K2 provided on the second conductive layer M2. The orthographic projection of the second bridge portion K2 on the substrate 100 and the orthographic projection of the first electromagnetic signal on the substrate 100 at least partially overlap. The position of the second bridge portion K2 corresponds to the position of the first electromagnetic signal line 210 that needs to be avoided.

[0052] Please see Figures 13 to 15 In some optional embodiments, the first electromagnetic signal line 210 includes a first portion Z1 and a second portion Z2 connected together; the second electromagnetic signal line 220 includes a third portion Z3 and a fourth portion Z4 connected together; and the electromagnetic coil 230 includes a first sub-part Z6 and a second sub-part Z5 connected together. The first portion Z1, the third portion Z3, and the first sub-part Z6 are all disposed on the first conductive layer M1, and the second portion Z2, the fourth portion Z4, and the second sub-part Z5 are all disposed on the second conductive layer M2. The orthographic projection of the first portion Z1 on the substrate 100 and the orthographic projection of the second portion Z2 on the substrate 100 at least partially overlap; the orthographic projections of the third portion Z3 and the fourth portion Z4 on the substrate 100 at least partially overlap; and the orthographic projections of the first sub-part Z6 and the second sub-part Z5 on the substrate 100 at least partially overlap.

[0053] Please see Figure 15 In this embodiment, the electromagnetic coil 230 may include two parts: a first sub-part Z6 located in the first conductive layer M1 and a second sub-part Z5 located in the second conductive layer M2. The first sub-part Z6 and the second sub-part Z5 are arranged in parallel to reduce the impedance of the electromagnetic coil 230, improve the transmission effect of electromagnetic signals, and ensure the accuracy of electromagnetic touch control.

[0054] Please see Figure 13Similarly, the first electromagnetic signal line 210 and the second electromagnetic signal line 220 can each include two parts located in the first conductive layer M1 and the second conductive layer M2, respectively. That is, the first electromagnetic signal line 210 includes a first part Z1 and a second part Z2. The first part Z1 and the second part Z2 can be connected by a via provided in the first insulating layer J1. The orthographic projection of the first part Z1 on the substrate 100 and the orthographic projection of the second part Z2 on the substrate 100 overlap at least partially. That is, the first part Z1 and the second part Z2 are stacked correspondingly to improve space utilization.

[0055] The second electromagnetic signal line 220 may include a third part Z3 and a fourth part Z4. The third part Z3 and the fourth part Z4 can be connected through a via provided in the first insulating layer J1. The orthographic projection of the third part Z3 on the substrate 100 and the orthographic projection of the fourth part Z4 on the substrate 100 overlap at least partially, that is, the third part Z3 and the fourth part Z4 are stacked in a corresponding manner to improve space utilization.

[0056] Optionally, the orthographic projection of the first part Z1 on the substrate 100 and the orthographic projection of the second part Z2 on the substrate 100 coincide, the orthographic projection of the third part Z3 on the substrate 100 and the orthographic projection of the fourth part Z4 on the substrate 100 coincide, and the orthographic projection of the first sub-part Z6 on the substrate 100 and the orthographic projection of the second sub-part Z5 on the substrate 100 coincide.

[0057] Please see Figure 13 In some optional embodiments, the first electromagnetic signal lines 210 corresponding to different electromagnetic coils 230 along the row direction X are connected by a first bridge portion K1 provided on the third conductive layer M3, and the orthographic projection of the first bridge portion K1 on the substrate 100 and the orthographic projection of the second electromagnetic signal line 220 on the substrate 100 at least partially overlap; or, the first electromagnetic signal lines 210 corresponding to different electromagnetic coils 230 along the column direction Y are connected by a second bridge portion K2 provided on the third conductive layer M3, and the orthographic projection of the second bridge portion K2 on the substrate 100 and the orthographic projection of the first electromagnetic signal line 210 on the substrate 100 at least partially overlap.

[0058] In this embodiment, since the first electromagnetic signal line 210, the second electromagnetic signal line 220 and the electromagnetic coil 230 each include two parts located in the first conductive layer M1 and the second conductive layer M2, the wiring space of the first conductive layer M1 and the second conductive layer M2 is occupied. Therefore, the first bridge part K1 and the second bridge part K2 can be located in the third conductive layer M3 for easy arrangement.

[0059] Please see Figure 11 as well as Figure 13In some optional embodiments, the touch layer 50 further includes a virtual electrode block 530; the orthographic projection of the virtual electrode block 530 on the substrate 100 and the orthographic projections of the first bridge portion K1 and the second bridge portion K2 on the substrate 100 do not overlap.

[0060] It should be noted that, in order to reduce the coupling capacitance between the touch layer 50 and other conductive film layers, the touch layer 50 can be provided with a virtual electrode block 530. The virtual electrode block 530 can be suspended, that is, the virtual electrode block 530 is not connected to a signal.

[0061] The virtual electrode block 530 can be disposed in the same layer as the touch electrode block 500 of the touch layer 50 for ease of fabrication. For example, when the first conductive layer M1, the first insulating layer J1, and the second conductive layer M2 are sequentially disposed along the direction away from the substrate 100, the first electromagnetic signal line 210, the second electromagnetic signal line 220, and the electromagnetic coil 230 are all disposed in the first conductive layer M1, and the touch electrode block 500 and the virtual electrode block 530 are disposed in the second conductive layer M2. Since the first bridge portion K1 and the second bridge portion K2 are also disposed in the second conductive layer M2, the virtual electrode block 530 located in the second conductive layer M2 needs to avoid the first bridge portion K1 and the second bridge portion K2. That is, the orthographic projection of the virtual electrode block 530 on the substrate 100 and the orthographic projection of the first bridge portion K1 and the second bridge portion K2 on the substrate 100 do not overlap, so as to avoid mutual interference between the touch electrode block 500 and the first bridge portion K1 and the second bridge portion K2.

[0062] Alternatively, when the first conductive layer M1, the first insulating layer J1, the second conductive layer M2, the second insulating layer J2, and the third conductive layer M3 are sequentially provided along a direction away from the substrate 100, the first electromagnetic signal line 210, the second electromagnetic signal line 220, and the electromagnetic coil 230 each include two parts located in the first conductive layer M1 and the second conductive layer M2, the first bridge portion K1 and the second bridge portion K2 are provided in the third conductive layer M3, and the touch electrode block 500 and the virtual electrode block 530 are provided in the third conductive layer M3. Therefore, it is necessary to restrict the virtual electrode block 530 to avoid the first bridge portion K1 and the second bridge portion K2 to prevent mutual interference.

[0063] In another embodiment, when a first conductive layer M1, a first insulating layer J1, a second conductive layer M2, a second insulating layer J2, and a third conductive layer M3 are sequentially provided along a direction away from the substrate 100, the first electromagnetic signal line 210 and the second electromagnetic signal line 220 are provided on the first conductive layer M1, the electromagnetic coil 230 is provided on the second conductive layer M2, and correspondingly, the first bridge portion K1 and the second bridge portion K2 are provided on the second conductive layer M2, and the touch electrode block 500 and the virtual electrode block 530 are provided on the third conductive layer M3. At this time, the orthographic projection of the virtual electrode block 530 on the substrate 100 and the orthographic projections of the first bridge portion K1 and the second bridge portion K2 on the substrate 100 are restricted from overlapping, which can avoid the generation of coupling capacitance. Of course, since the virtual electrode block 530 and the first bridge portion K1 and the second bridge portion K2 are not located on the same layer in this embodiment, the orthographic projection of the virtual electrode block 530 on the substrate 100 can also overlap with the orthographic projections of the first bridge portion K1 and the second bridge portion K2 on the substrate 100 according to actual needs.

[0064] Please see Figure 16 , Figure 16 This is a flowchart of a touch panel driving method provided in one embodiment of the present invention; another embodiment of the present invention provides a touch panel driving method, including: S110: The electromagnetic touch module 200 includes a driving state and a sensing state. In the driving state, a high-potential driving signal is transmitted to one of the first electromagnetic signal line 210 and the second electromagnetic signal line 220 through the electromagnetic touch chip 300 of the touch panel, while the other is connected to a low-potential signal. S120: In the induction state, the first electromagnetic signal line 210 and the second electromagnetic signal line 220 receive the induction signal in a time-sharing manner, and the one of the first electromagnetic signal line 210 and the second electromagnetic signal line 220 that does not receive the induction signal is connected to a low potential signal.

[0065] In the touch panel driving method provided in the embodiments of the present invention, in the driving state, the first electromagnetic signal line 210 and the second electromagnetic signal line 220 can respectively receive a high-potential driving signal and a low-potential signal, and the low-potential signal can include a ground signal or a low-potential voltage signal.

[0066] When the electromagnetic coil 230 is driven, it charges the electromagnetic pen 400. For example, all first electromagnetic signal lines 210 can be driven, in which case all second electromagnetic signal lines 220 are connected to a low-potential voltage signal or a ground signal; or all second electromagnetic signal lines 220 can be driven, in which case all first electromagnetic signal lines 210 are connected to a low-potential voltage signal or a ground signal. When the electromagnetic pen 400 sends electromagnetic signals to the electromagnetic coil 230, the electromagnetic touch chip 300 receives the electromagnetic induction signal through the electromagnetic coil 230 to identify the position coordinates of the electromagnetic pen 400.

[0067] When the electromagnetic coil 230 is sensing, both the first electromagnetic signal line 210 and the second electromagnetic signal line 220 need to receive the sensing signal, but they need to receive it in a time-division manner. For example, when the first electromagnetic signal line 210 is sensing, the second electromagnetic signal line 220 at the other end of the coil is connected to a low-potential voltage signal or a ground signal to obtain the coordinates of the electromagnetic pen 400 in the row direction X; when the second electromagnetic signal line 220 is sensing, the first electromagnetic signal line 210 at the other end of the coil is connected to a low-potential voltage signal or a ground signal to obtain the coordinates of the electromagnetic pen 400 in the column direction Y, ensuring the accuracy of the electromagnetic touch control of the touch panel.

[0068] Optionally, in the driving state, the first electromagnetic signal line 210 can receive a high-potential driving signal, and the second electromagnetic signal line 220 can be connected to a ground signal or a low-potential voltage signal to ensure that the transmission path of the voltage signal is from the high-potential signal end to the low-potential signal end, thus ensuring the accuracy of touch position detection.

[0069] In some optional embodiments, in the induction state, the first electromagnetic signal line 210 and the second electromagnetic signal line 220 receive the induction signal in a time-sharing manner, and one of the first electromagnetic signal lines 210 and the second electromagnetic signal line 220 that does not receive the induction signal is connected to a low potential signal: the electromagnetic touch chip 300 receives the induction signal of each first electromagnetic signal line 210 row by row, or the electromagnetic touch chip 300 receives the induction signal of each second electromagnetic signal line 220 column by column.

[0070] Understandably, to accurately determine the position of the electromagnetic pen 400 in the row direction X and column direction Y, the electromagnetic touch chip 300 can receive the sensing signals of each first electromagnetic signal line 210 row by row to determine the column where the electromagnetic coil 230 that triggered the touch is located. Then, the electromagnetic touch chip 300 receives the sensing signals of each second electromagnetic signal line 220 column by column to determine the row where the electromagnetic coil 230 that triggered the touch is located, thereby determining the specific touch position. Optionally, when performing signal scanning, the electromagnetic touch chip 300 can identify different channels by coding each channel signal (each electromagnetic signal line).

[0071] like Figure 1 as well as Figure 17 As shown, Figure 17 This is a timing diagram corresponding to a touch panel driving method provided in one embodiment of the present invention. The second electromagnetic signal line 220 includes a first signal line 1, a second signal line 2, a third signal line 3, and a fourth signal line 4. The electromagnetic touch chip 300 sequentially receives the sensing signals from the first signal line 1, the second signal line 2, the third signal line 3, and the fourth signal line 4.

[0072] This invention also provides a display device, including the touch panel in any of the above embodiments.

[0073] The display device provided in this embodiment of the invention has the technical effects of the touch panel in any of the above embodiments. The explanations of the same or corresponding structures and terms in the above embodiments will not be repeated here.

[0074] The display device provided in the embodiments of the present invention can be an organic light-emitting diode (OLED) touch panel, a quantum dot light-emitting diode (QLED) or a micro-flat touch panel (Micro-OLED or Micro-LED), etc.

[0075] The touch panel provided in this embodiment of the invention can be applied to mobile phones or any electronic product with display function, including but not limited to the following categories: televisions, laptops, desktop monitors, tablets, digital cameras, smart bracelets, smart glasses, in-vehicle displays, medical devices, industrial control equipment, touch interactive terminals, etc. This embodiment of the invention does not impose any special limitations on these.

[0076] The above are merely specific embodiments of the present invention. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the protection scope of the present invention.

[0077] It should also be noted that the exemplary embodiments mentioned in this invention describe methods or systems based on a series of steps or apparatus. However, this invention is not limited to the order of the steps described above; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

Claims

1. A touch panel, characterized in that, include; substrate; An electromagnetic touch module is disposed on one side of the substrate. The electromagnetic touch module includes a first electromagnetic signal line, a second electromagnetic signal line, and a plurality of electromagnetic coils arranged at intervals along the row and column directions. The electromagnetic coils are arranged in the same layer, and each electromagnetic coil has an open ring structure. Each electromagnetic coil includes a first end and a second end corresponding to the opening. The first electromagnetic signal line is electrically connected to the first end of each electromagnetic coil located in the same row, and the second electromagnetic signal line is electrically connected to the second end of each electromagnetic coil located in the same column. The first electromagnetic signal line and the second electromagnetic signal line are mutually insulated. An electromagnetic touch chip is disposed on one side of the substrate, and the first electromagnetic signal line and the second electromagnetic signal line are electrically connected to the electromagnetic touch chip respectively.

2. The touch panel according to claim 1, characterized in that, The opening of the electromagnetic coil is located on the side of the electromagnetic coil facing the electromagnetic touch chip.

3. The touch panel according to claim 1, characterized in that, A first conductive layer, a first insulating layer, and a second conductive layer are sequentially provided along a direction away from the substrate; The first electromagnetic signal line, the second electromagnetic signal line, and the electromagnetic coil are at least partially arranged in the same layer.

4. The touch panel according to claim 3, characterized in that, The first electromagnetic signal line, the second electromagnetic signal line, and the electromagnetic coil are all disposed on the first conductive layer; The first electromagnetic signal lines that are connected to different electromagnetic coils along the row direction are connected by a first bridge portion provided on the second conductive layer. The orthographic projection of the first bridge portion on the substrate and the orthographic projection of the second electromagnetic signal line on the substrate at least partially overlap. Alternatively, the first electromagnetic signal lines of the electromagnetic coils that are connected to each other along the column direction are connected by a second bridge portion provided on the second conductive layer, wherein the orthographic projection of the second bridge portion on the substrate and the orthographic projection of the first electromagnetic signal line on the substrate at least partially overlap.

5. The touch panel according to claim 4, characterized in that, It also includes a touch layer, which is at least partially disposed on the second conductive layer. The touch layer includes a touch electrode block, and the orthographic projection of the touch electrode block on the substrate and the orthographic projections of the first bridge portion and the second bridge portion on the substrate do not overlap.

6. The touch panel according to claim 1, characterized in that, Along a direction away from the substrate, a first conductive layer, a first insulating layer, a second conductive layer, a second insulating layer, and a third conductive layer are sequentially provided; The first electromagnetic signal line, the second electromagnetic signal line, and the electromagnetic coil are disposed in at least one of the first conductive layer and the second conductive layer; The touch panel further includes a touch layer, which is at least partially disposed on the third conductive layer.

7. The touch panel according to claim 6, characterized in that, The first electromagnetic signal line and the second electromagnetic signal line are disposed on the first conductive layer, and the electromagnetic coil is disposed on the second conductive layer; The first electromagnetic signal lines that are connected to different electromagnetic coils along the row direction are connected by a first bridge portion provided on the second conductive layer. The orthographic projection of the first bridge portion on the substrate and the orthographic projection of the second electromagnetic signal line on the substrate at least partially overlap. Alternatively, the first electromagnetic signal lines of the electromagnetic coils that are connected to each other along the column direction are connected by a second bridge portion provided on the second conductive layer, wherein the orthographic projection of the second bridge portion on the substrate and the orthographic projection of the first electromagnetic signal line on the substrate at least partially overlap.

8. The touch panel according to claim 6, characterized in that, The first electromagnetic signal line includes a first part and a second part connected together; the second electromagnetic signal line includes a third part and a fourth part connected together; and the electromagnetic coil includes a first sub-part and a second sub-part connected together. The first part, the third part, and the first sub-part are all disposed on the first conductive layer, and the second part, the fourth part, and the second sub-part are all disposed on the second conductive layer; The orthographic projections of the first part and the second part on the substrate at least partially overlap, the orthographic projections of the third part and the fourth part on the substrate at least partially overlap, and the orthographic projections of the first sub-part and the second sub-part on the substrate at least partially overlap.

9. The touch panel according to claim 8, characterized in that, The first electromagnetic signal lines that are connected to different electromagnetic coils along the row direction are connected by a first bridge portion provided on the third conductive layer. The orthographic projection of the first bridge portion on the substrate and the orthographic projection of the second electromagnetic signal line on the substrate at least partially overlap. Alternatively, the first electromagnetic signal lines of the electromagnetic coils that are connected to each other along the column direction are connected by a second bridge portion provided on the second conductive layer, wherein the orthographic projection of the second bridge portion on the substrate and the orthographic projection of the first electromagnetic signal line on the substrate at least partially overlap.

10. The touch panel according to claim 5 or 9, characterized in that, The touch layer also includes virtual electrode blocks; The orthographic projection of the virtual electrode block on the substrate and the orthographic projections of the first bridge portion and the second bridge portion on the substrate do not overlap.

11. A touch panel driving method, characterized in that, include; The electromagnetic touch module includes a driving state and a sensing state. In the driving state, a high-potential driving signal is transmitted to one of the first electromagnetic signal line and the second electromagnetic signal line through the electromagnetic touch chip of the touch panel, while the other is connected to a low-potential signal. In the induction state, the first electromagnetic signal line and the second electromagnetic signal line receive the induction signal in a time-division manner, and the one of the first electromagnetic signal line and the second electromagnetic signal line that does not receive the induction signal is connected to a low potential signal.

12. The touch panel driving method according to claim 11, characterized in that, In the induction state, the first electromagnetic signal line and the second electromagnetic signal line receive the induction signal in a time-division manner, and one of the first electromagnetic signal line and the second electromagnetic signal line that does not receive the induction signal is connected to a low-potential signal: The electromagnetic touch chip receives the induced signals of each of the first electromagnetic signal lines row by row, or the electromagnetic touch chip receives the induced signals of each of the second electromagnetic signal lines column by column.

13. A display device, characterized in that, Includes the touch panel as described in any one of claims 1 to 10.

Images