Electromagnetic-capacitive integrated touch display apparatus

Abstract

The present application belongs to the technical field of touch. Disclosed are an electromagnetic-capacitive integrated touch display apparatus. The touch display apparatus comprises: a base material, an induction surface being manufactured on the base material, the induction surface comprising a plurality of first capacitive metal grid channels and a plurality of first electromagnetic metal grid channels, a driving surface being manufactured below the base material, and the driving surface comprising a plurality of second capacitive metal grid channels and a plurality of second electromagnetic metal grid channels; a cover plate layer provided on the base material; and a liquid crystal display layer provided below the base material. The first capacitive metal grid channels and the first electromagnetic metal grid channels in the induction surface are arranged in a first direction, and the second capacitive metal grid channel and the second electromagnetic metal grid channel in the driving surface are arranged in a second direction, the first direction and the second direction being perpendicular to each other. The structure corresponding to the technical solution is simple and thin, which follows the development trend of slim and lightweight display modules.

Description

Electromagnetic and capacitive integrated touch display device

[0001] This application claims priority to Chinese patent application number 2024100066360, filed on January 2, 2024, entitled “Electromagnetic and capacitor integrated touch display device,” the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the field of touch technology, and in particular to an electromagnetic and capacitive integrated touch display device. Background Art

[0003] With the rapid development of information technology, electronic devices are becoming increasingly closely related to people's lives. These electronic devices can receive user input and implement functions required by the user based on the input.

[0004] An electromagnetic-capacitive dual-mode touch input device can transmit both electromagnetic signals (inputted via an electromagnetic screen) and capacitive signals (inputted via a capacitive screen). The electromagnetic signals typically use electromagnetic induction technology to simulate pen strokes or other input operations. To achieve electromagnetic-capacitive dual-mode touch, capacitive and electromagnetic touch are typically combined. The electromagnetic touch module is typically placed on the bottom surface of the display module, while the capacitive touch module is placed on top.

[0005] In the above-mentioned electromagnetic capacitive dual-mode touch implementation scheme, adding an electromagnetic module alone will lead to an increase in the thickness of the display module, a complex structure, and high manufacturing costs, which is inconsistent with the trend of lightweight and thin development of display modules. In addition, the assembly of the electromagnetic module and the display module will be unstable and imprecise, resulting in a decrease in touch accuracy.

[0006] Application Contents

[0007] The purpose of this application is to provide an electromagnetic and capacitor integrated touch display device, which has an electromagnetic and capacitor integrated sensing surface and a driving surface made on a substrate, has a simple structure and a small thickness, and conforms to the trend of thinner and lighter display modules.

[0008] To achieve the above application objectives, this application proposes the following technical solutions:

[0009] A touch display device integrating electromagnetic and capacitive elements, the touch display device comprising:

[0010] A substrate, wherein a sensing surface is formed on the substrate, the sensing surface includes a plurality of first capacitive metal grid channels and a plurality of first electromagnetic metal grid channels, and a driving surface is formed below the substrate, the driving surface includes a plurality of second capacitive metal grid channels and a plurality of second electromagnetic metal grid channels;

[0011] a cover layer disposed on the substrate;

[0012] a liquid crystal display layer disposed below the substrate;

[0013] The first capacitive metal grid channel and the first electromagnetic metal grid channel in the sensing surface are arranged along a first direction, and the second capacitive metal grid channel and the second electromagnetic metal grid channel in the driving surface are arranged along a second direction, and the first direction and the second direction are perpendicular to each other.

[0014] In one possible implementation, the sensing surface includes a plurality of first magnetic-capacitive integrated units arranged along the first direction, each of the first magnetic-capacitive integrated units including: a first electromagnetic channel loop formed by connecting two non-adjacent first electromagnetic metal mesh channels at ends of one channel, and a first capacitive metal mesh channel in the first electromagnetic channel loop;

[0015] The driving surface includes a plurality of second magnetic-capacitive integrated units arranged along the second direction, each of the second magnetic-capacitive integrated units including: a second electromagnetic channel loop formed by two non-adjacent second electromagnetic metal grid channels connected at the ends of one channel, and a second capacitor metal grid channel located in the second electromagnetic channel loop.

[0016] In a possible implementation, each of the first electromagnetic metal mesh channels and the first capacitive metal mesh channels is connected to a peripheral metal wire at a channel end corresponding to an opposite end of the first electromagnetic channel loop;

[0017] Each of the second electromagnetic metal grid channels and the second capacitive metal grid channels is connected to a peripheral metal wire at a channel end corresponding to the opposite end of the loop of the second electromagnetic channel.

[0018] In a possible implementation, the loop channel impedance of the first electromagnetic channel loop and the second electromagnetic channel loop is less than 2 kilo-ohms.

[0019] In a possible implementation manner, in each of the first magnetic-capacitive integrated units, the first capacitor metal mesh channel is separated from the two first electromagnetic metal mesh channels on both sides by a first distance;

[0020] In each of the second magnetic-capacitive integrated units, the second capacitor metal grid channel is separated from the two second electromagnetic metal grid channels on both sides by the first spacing, and the first spacing is greater than 0.

[0021] In a possible implementation manner, two adjacent first magnetic-capacitive integrated units are separated by a second distance;

[0022] Two adjacent second magnetic-capacitive integrated units are separated by the second distance, and the second distance is greater than or equal to 0.4 mm.

[0023] In a possible implementation manner, the first capacitor metal mesh channels in two adjacent first magnetic-capacitive integrated units are separated by a third distance;

[0024] The second capacitor metal grid channels in two adjacent second magnetic-capacitive integrated units are separated by a third distance, and the third distance is less than or equal to five millimeters.

[0025] In a possible implementation manner, the number of mesh nodes corresponding to the first capacitive metal mesh channel, the first electromagnetic metal mesh channel, the second capacitive metal mesh channel, and the second electromagnetic metal mesh channel is greater than or equal to 2.

[0026] Compared with the prior art, this application has the following beneficial effects:

[0027] A single-layer, double-sided, electromagnetic-capacitive integrated touch display device is provided. A sensing surface and a driving surface are fabricated on a substrate. Capacitive metal grid channels and electromagnetic metal grid channels are distributed in both the sensing surface and the driving surface. The sensing surface and the driving surface are designed to be magnetically and capacitively integrated, resulting in a simple overall touch display device structure and a small thickness, which conforms to the trend of thinner and lighter display modules.

[0028] Furthermore, in each magnetic-capacitive integrated unit of the sensing surface and the driving surface, the two electromagnetic metal mesh channels are connected through an electromagnetic channel loop to reduce the impedance of the two electromagnetic metal mesh channels, and a capacitive metal mesh channel is designed in the electromagnetic channel loop to ensure the simultaneous realization of capacitive touch function and electromagnetic touch function.

[0029] Furthermore, the spacing involved in each metal grid channel is designed, such as: adjacent capacitive metal grid channels and electromagnetic metal grid channels are separated by a first spacing greater than 0, two adjacent magnetic-capacitive integrated units are separated by a second spacing greater than or equal to 0.4 mm, and the two closest capacitive metal grid channels are separated by a third spacing less than or equal to five mm. The spacing design avoids signal interference and ensures touch response effect.

[0030] It should be noted that this application only needs to achieve at least one of the above technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG1 is a cross-sectional schematic diagram of an electromagnetic and capacitive integrated touch display device provided in an embodiment of the present application;

[0032] FIG2 is a cross-sectional schematic diagram of an electromagnetic and capacitive integrated touch display device provided in an embodiment of the present application;

[0033] FIG3 is a plan view of a metal mesh channel integrated with an electromagnetic capacitor provided in an embodiment of the present application;

[0034] FIG4 is a plan view of a first magnetic-capacitive integrated unit in a sensing surface provided in an embodiment of the present application;

[0035] FIG5 is a plan view of a second magnetic-capacitive integrated unit in a driving surface provided in an embodiment of the present application;

[0036] FIG6 is a plan view of a metal mesh channel integrated with an electromagnetic capacitor provided in an embodiment of the present application;

[0037] FIG7 is a plan view of a vertical metal mesh channel provided in an embodiment of the present application;

[0038] FIG8 is a plan view of a horizontal row of metal mesh channels provided in an embodiment of the present application. DETAILED DESCRIPTION

[0039] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0040] In the description of the present application, it should be understood that the terms "vertical", "upper", "lower", "top", "side", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0041] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0042] In order to address the problem in the related art that the structural setting of the electromagnetic touch module and the capacitive touch module superimposed leads to an increase in the thickness of the overall device, in an embodiment of the present application, a single-layer, double-sided, electromagnetic and capacitive integrated touch display device is provided. The device has an electromagnetic and capacitive integrated sensing surface and driving surface made on a substrate, has a simple structure and a small thickness, which is in line with the trend of lightweight and thin display modules.

[0043] The following is an introduction to the technical solutions provided in the embodiments of the present application.

[0044] With reference to FIG1 , an embodiment of the present application provides an electromagnetic and capacitive integrated touch display device (hereinafter referred to as a touch display device), the touch display device comprising:

[0045] (1) A substrate, wherein a sensing surface is formed on the substrate, and the sensing surface includes a plurality of first capacitive metal grid channels and a plurality of first electromagnetic metal grid channels; and a driving surface is formed under the substrate, and the driving surface includes a plurality of second capacitive metal grid channels and a plurality of second electromagnetic metal grid channels.

[0046] (2) A cover layer provided on the substrate.

[0047] (3) A liquid crystal display layer disposed under the substrate.

[0048] The first capacitive metal grid channel and the first electromagnetic metal grid channel in the sensing surface are arranged along a first direction, and the second capacitive metal grid channel and the second electromagnetic metal grid channel in the driving surface are arranged along a second direction. The first direction and the second direction are perpendicular to each other.

[0049] In the embodiments of this application, a single-layer, double-sided structural design is adopted, with the sensing surface fabricated above the substrate and the driving surface fabricated below the substrate. Both the sensing and driving surfaces are provided with capacitive metal mesh channels and electromagnetic metal mesh channels to implement capacitive touch and electromagnetic touch functions. It is understood that this application does not restrict the design of structurally repositioning the sensing and driving surfaces, i.e., fabricating the driving surface above the substrate and the sensing surface below the substrate.

[0050] Among them, the implementation principles of capacitive touch function and electromagnetic touch function can be referred to as follows: the induced capacitance between the sensing electrode of the touch display device and the touching object (such as a finger) is formed by the capacitive metal grid channels in the sensing surface and the driving surface. When a finger is touched, the capacitive metal grid channels in the sensing surface and the driving surface are used to identify the position information. The mutual capacitance change caused by the finger touch causes the received signal to change. The waveform signal is given through the driving surface, and the waveform signal is received through the sensing surface. The position information corresponding to the finger touch is identified based on the difference in the waveform signals, thereby realizing the capacitive touch function; when an electromagnetic pen is used for operation, the electromagnetic pen is used to induce the electromagnetic metal grid channels in the sensing surface and the driving surface during operation, and the touch position point is calculated based on the generated magnetic flux change, thereby realizing the electromagnetic touch function.

[0051] In the embodiment of the present application, the sensing surface and the driving surface can be produced on the basis of the substrate through processes such as coating, exposure, development, copperization, blackening, and preparation of a protective layer. This aspect does not limit the specific process and process parameters of the process.

[0052] Specifically, the first capacitive metal grid channel and the first electromagnetic metal grid channel are arranged on the same layer in the sensing surface, and are manufactured above the substrate through processes such as coating, exposure, development, copperization, blackening, and preparation of a protective layer. The first capacitive metal grid channel and the first electromagnetic metal grid channel contain multiple metal grid capacitive sensing lines and multiple metal grid electromagnetic induction lines.

[0053] Specifically, the second capacitive metal grid channel and the second electromagnetic metal grid channel are arranged on the same layer in the driving surface, and are manufactured under the substrate through processes such as coating, exposure, development, copperization, blackening, and preparation of a protective layer. The second capacitive metal grid channel and the second electromagnetic metal grid channel contain multiple metal grid capacitive induction lines and multiple metal grid electromagnetic induction lines.

[0054] In an embodiment of the present application, a cover layer is arranged on the substrate, and user touch operations such as finger touch and electromagnetic pen touch are received through the cover layer. A liquid crystal display layer is arranged under the substrate, and visual display is performed through the liquid crystal display layer to realize the touch display function of the touch display device.

[0055] In an embodiment of the present application, the substrate can be a transparent film or a transparent glass substrate, such as a substrate of polyester resin (PET), cycloolefin polymer (COP) or soda-lime glass, aluminosilicate glass, etc.; the cover layer can be made of common materials in the field, such as glass or organic materials, and the present application has no restrictions on this.

[0056] In the embodiment of the present application, the cover layer and the substrate may be bonded together by optically clear adhesive (OCA); the liquid crystal display layer and the substrate may also be bonded together by optically clear adhesive, which is not limited in the present application.

[0057] For example, Figure 2 is a cross-sectional view of a touch display device according to one embodiment of the present application. As shown in Figure 2, the touch display device of this embodiment includes: a cover lens module (Cover Lens) 110; a first bonding module 120; a first electromagnetic metal mesh channel 130, which includes multiple metal mesh electromagnetic induction lines; a first capacitor metal mesh channel 140, which includes multiple metal mesh capacitor induction lines; a substrate 150; a second electromagnetic metal mesh channel 160, which includes multiple metal mesh electromagnetic induction lines; a second capacitor metal mesh channel 170, which includes multiple metal mesh capacitor drive lines; a second bonding module 180; and a liquid crystal display layer module 190.

[0058] In an embodiment of the present application, a plurality of vertical electromagnetic metal mesh channels, a plurality of capacitive metal mesh channels and a plurality of horizontal electromagnetic metal mesh channels, a plurality of capacitive metal mesh channels are interlaced and arranged together to form an electromagnetic and capacitive integrated dual touch. For example, the first direction is horizontal, that is, the channels in the sensing surface are arranged horizontally, and the second direction is vertical, that is, the channels in the driving surface are arranged vertically. For example, the first direction is vertical, that is, the channels in the sensing surface are arranged vertically, and the second direction is horizontal, that is, the channels in the driving surface are arranged horizontally.

[0059] For example, as shown in FIG3 , a plurality of first electromagnetic metal mesh channels 130a and a plurality of first capacitive metal mesh channels 140a are arranged at intervals in the sensing surface; a plurality of second electromagnetic metal mesh channels 160a and a plurality of second capacitive metal mesh channels 170a are arranged at intervals in the driving surface. It can be understood that the specific arrangement of the capacitive metal mesh channels and the electromagnetic metal mesh channels can be selected according to actual needs. As long as there are capacitive metal mesh channels and electromagnetic metal mesh channels at the required positions of a touch screen, it is possible to simultaneously realize the capacitive touch function and the electromagnetic touch function at each position of the touch display device. In addition, in this embodiment, the number of capacitive metal mesh channels and electromagnetic metal mesh channels can be selected as needed and is not limited to the number shown in FIG3 .

[0060] Next, the specific design of the sensing surface and the driving surface is described.

[0061] In one possible embodiment, the sensing surface includes a plurality of first magnetic-capacitor integrated units arranged along a first direction, each first magnetic-capacitor integrated unit including: a first electromagnetic channel loop formed by two non-adjacent first electromagnetic metal grid channels connected at the ends of one channel, and a first capacitor metal grid channel located in the first electromagnetic channel loop; the driving surface includes a plurality of second magnetic-capacitor integrated units arranged along a second direction, each second magnetic-capacitor integrated unit including: a second electromagnetic channel loop formed by two non-adjacent second electromagnetic metal grid channels connected at the ends of one channel, and a second capacitor metal grid channel located in the second electromagnetic channel loop.

[0062] In this embodiment, the sensing surface can be divided into multiple first integrated magnetic and capacitor units, and the driving surface can be divided into multiple second integrated magnetic and capacitor units. In each integrated magnetic and capacitor unit, two non-adjacent electromagnetic metal mesh channels form a loop, with a capacitive metal mesh channel located between the two non-adjacent electromagnetic metal mesh channels. In each integrated magnetic and capacitor unit, the two electromagnetic metal mesh channels are connected by an electromagnetic channel loop to reduce the impedance of the two electromagnetic metal mesh channels. By designing the capacitive metal mesh channel within the electromagnetic channel loop, the integrated magnetic and capacitor unit can simultaneously maintain electromagnetic touch and capacitive touch functions.

[0063] For example, between two adjacent horizontal rows of first capacitive metal mesh channels, there are at least two horizontal first electromagnetic metal mesh channels, and these two horizontal first electromagnetic metal mesh channels form a loop. Similarly, between two adjacent vertical columns of second capacitive metal mesh channels, there are at least two vertical second electromagnetic metal mesh channels, and these two vertical second electromagnetic metal mesh channels form a loop.

[0064] In a possible implementation, the loop channel impedance of the first electromagnetic channel loop and the second electromagnetic channel loop is less than 2 kilo-ohms.

[0065] In this embodiment, the impedance of the magnetic channel loop in the sensing surface and the driving surface is limited to below 2 kilo-ohms, so as to improve the signal transmission effect of the sensing surface and the driving surface.

[0066] In one possible embodiment, each first electromagnetic metal grid channel and first capacitor metal grid channel is connected to a peripheral metal wire at the channel end corresponding to the opposite end of the first electromagnetic channel loop; each second electromagnetic metal grid channel and second capacitor metal grid channel is connected to a peripheral metal wire at the channel end corresponding to the opposite end of the second electromagnetic channel loop.

[0067] In this embodiment, a peripheral metal wire is connected to the end of each electromagnetic metal grid channel and capacitor metal grid channel. The peripheral metal wire can be pressed with the software circuit board to receive signals from each electromagnetic metal grid channel and capacitor metal grid channel through the software circuit board and perform signal processing through the software circuit board.

[0068] For example, Figure 4 is a schematic plan view of a first integrated magnetic and capacitive unit in a sensing surface according to one embodiment of the present application. As shown in Figure 4, first electromagnetic metal mesh channel 130a and first electromagnetic metal mesh channel 130b form a loop, constituting first electromagnetic channel loop 130; first capacitive metal mesh channel 140a is a standalone operating channel; together, they form the first integrated magnetic and capacitive unit in the sensing surface.

[0069] Among them, the first electromagnetic metal mesh channel 130a and the first electromagnetic metal mesh channel 130b form a loop, and realize the electromagnetic function of the metal mesh sensing surface by connecting the peripheral metal wires 210a and 210b; similarly, the first capacitive metal mesh channel 140a realizes the capacitive function of the metal mesh sensing surface by connecting the peripheral metal wire 220a.

[0070] Similarly, Figure 5 is a schematic plan view of a second integrated magnetic and capacitor unit in the drive surface according to one embodiment of the present application. As shown in Figure 5, the second electromagnetic metal mesh channel 160a and the second electromagnetic metal mesh channel 160b form a loop, forming the second electromagnetic channel loop 160; the second capacitor metal mesh channel 170a is a separate operating channel; together, they form the second integrated magnetic and capacitor unit in the drive surface.

[0071] Among them, the second electromagnetic metal grid channel 160a and the second electromagnetic metal grid channel 160b form a loop, and realize the electromagnetic function of the metal grid driving surface by connecting the peripheral metal wires 230a and 230b; similarly, the second capacitive metal grid channel 170a realizes the capacitive function of the metal grid driving surface by connecting the peripheral metal wire 240a.

[0072] By combining the first magnetic-capacitive integrated unit in the sensing surface corresponding to FIG. 4 and the second magnetic-capacitive integrated unit in the driving surface corresponding to FIG. 5 , a planar schematic diagram of an electromagnetic-capacitive integrated metal mesh touch unit as shown in FIG. 6 can be obtained.

[0073] In one possible implementation, in each first magnetic-capacitor integrated unit, the first capacitor metal grid channel is separated from the two first electromagnetic metal grid channels on both sides by a first spacing; in each second magnetic-capacitor integrated unit, the second capacitor metal grid channel is separated from the two second electromagnetic metal grid channels on both sides by a first spacing, and the first spacing is greater than 0.

[0074] In this embodiment, in each magnetic-capacitive integrated unit, adjacent capacitor metal grid channels and electromagnetic metal grid channels are separated by a first spacing greater than 0 to avoid mutual interference between the electromagnetic and capacitor channels and prevent short circuits.

[0075] In a possible implementation, two adjacent first integrated magnetic-capacitor units are separated by a second distance; two adjacent second integrated magnetic-capacitor units are separated by a second distance, and the second distance is greater than or equal to 0.4 mm.

[0076] In this embodiment, two adjacent integrated magnetic and capacitor units are separated by a second spacing greater than or equal to 0.4 mm to avoid mutual interference in signal induction between the two adjacent integrated magnetic and capacitor units.

[0077] In one possible implementation, the first capacitor metal grid channels in two adjacent first magnetic-capacitor integrated units are separated by a third distance; the second capacitor metal grid channels in two adjacent second magnetic-capacitor integrated units are separated by a third distance, and the third distance is less than or equal to five millimeters.

[0078] In this embodiment, the two closest capacitor metal grid channels are separated by a third spacing of less than or equal to five millimeters. The limitation of the third spacing prevents the two closest capacitor metal grid channels from being too far apart, thereby ensuring the realization of the capacitive touch function.

[0079] In a possible implementation, the number of mesh nodes corresponding to the first capacitive metal mesh channel, the first electromagnetic metal mesh channel, the second capacitive metal mesh channel, and the second electromagnetic metal mesh channel is greater than or equal to 2.

[0080] In this embodiment, the number of grid nodes corresponding to each capacitive metal mesh channel and electromagnetic metal mesh channel is designed to be greater than or equal to two to avoid problems such as short lines and low yield caused by too few grid nodes in the capacitive metal mesh channel and electromagnetic metal mesh channel. Furthermore, the pattern of the capacitive metal mesh channel and the electromagnetic metal mesh channel can be a diamond pattern, and the material can be prepared using materials such as silver and copper. This application does not limit the specific shape of the pattern or the specific type of material.

[0081] For example, as shown in Figure 7, taking the sensing surface as a vertical direction as an example, in the vertical electromagnetic capacitor metal grid channel, the electromagnetic metal grid channel 10, the electromagnetic metal grid channel 20 and the electromagnetic metal grid channel 30 are designed to form a loop, and the grid nodes 50 of the electromagnetic metal grid channel are greater than or equal to 2, and the impedance of the loop formed by the electromagnetic metal grid channel 10, the electromagnetic metal grid channel 20 and the electromagnetic metal grid channel 30 is less than or equal to 2 kilo-ohms; the capacitor metal grid channel 40 is between the electromagnetic metal grid channel 10 and the electromagnetic metal grid channel 30, and the distance D1 between the electromagnetic metal grid channels 10, 30 and the capacitor metal grid channel 40 is greater than zero; the distance D3 between the non-adjacent first capacitor metal grid channel 40 and the second capacitor metal grid channel 40 is less than or equal to five millimeters; the distance D2 between the adjacent first electromagnetic metal grid channel 30 and the second electromagnetic metal grid channel 10 is greater than or equal to 0.4 millimeters.

[0082] Similarly, as shown in Figure 8, taking the driving surface as the horizontal direction as an example, in the horizontal electromagnetic capacitor metal mesh channel, the electromagnetic metal mesh channel 60, the electromagnetic metal mesh channel 70 and the electromagnetic metal mesh channel 80 are designed to form a loop, and the grid nodes 91 of the electromagnetic metal mesh channel are greater than or equal to 2, and the loop impedance formed by the electromagnetic metal mesh channel 60, the electromagnetic metal mesh channel 70 and the electromagnetic metal mesh channel 80 is less than or equal to 2 kilo-ohms; the capacitor metal mesh channel 90 is between the electromagnetic metal mesh channel 60 and the electromagnetic metal mesh channel 80, and the distance D1 between the electromagnetic metal mesh channels 60, 80 and the capacitor metal mesh channel 90 is greater than zero; the distance D6 between the first non-adjacent capacitor metal mesh channel 90 and the second capacitor metal mesh channel 90 is less than or equal to five millimeters; the distance D5 between the first adjacent electromagnetic metal mesh channel 60 and the second electromagnetic metal mesh channel 80 is greater than or equal to 0.4 millimeters.

[0083] In summary, the technical solution provided in the embodiments of the present application provides a single-layer, double-sided, electromagnetic-capacitive integrated touch display device, which has a sensing surface and a driving surface made on a substrate, and capacitor metal grid channels and electromagnetic metal grid channels are distributed in the sensing surface and the driving surface. The sensing surface and the driving surface are designed to be magnetic-capacitive integrated, so that the overall touch display device has a simple structure and a small thickness, which is in line with the trend of lightweight and thin display modules.

[0084] Furthermore, in each magnetic-capacitive integrated unit of the sensing surface and the driving surface, the two electromagnetic metal mesh channels are connected through an electromagnetic channel loop to reduce the impedance of the two electromagnetic metal mesh channels, and a capacitive metal mesh channel is designed in the electromagnetic channel loop to ensure the simultaneous realization of capacitive touch function and electromagnetic touch function.

[0085] Furthermore, the spacing involved in each metal grid channel is designed, such as: adjacent capacitive metal grid channels and electromagnetic metal grid channels are separated by a first spacing greater than 0, two adjacent magnetic-capacitive integrated units are separated by a second spacing greater than or equal to 0.4 mm, and the two closest capacitive metal grid channels are separated by a third spacing less than or equal to five mm. The spacing design avoids signal interference and ensures touch response effect.

[0086] All of the above optional technical solutions can be combined in any way to form optional embodiments of the present application, that is, any multiple embodiments can be combined to meet the needs of different application scenarios. They are all within the scope of protection of the present application and will not be described in detail here.

[0087] It should be noted that the above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An electromagnetic and capacitive integrated touch display device, characterized in that, The touch display device includes: a substrate, on which an induction surface is fabricated. The induction surface includes a plurality of first capacitive metal grid channels and a plurality of first electromagnetic metal grid channels, and under the substrate, a driving surface is fabricated. The driving surface includes a plurality of second capacitive metal grid channels and a plurality of second electromagnetic metal grid channels; a cover layer disposed on the substrate; a liquid crystal display layer disposed under the substrate; wherein, the first capacitive metal grid channels and the first electromagnetic metal grid channels in the induction surface are arranged along a first direction, and the second capacitive metal grid channels and the second electromagnetic metal grid channels in the driving surface are arranged along a second direction, and the first direction and the second direction are perpendicular to each other.

2. The touch display device according to claim 1, wherein the induction surface includes a plurality of first magneto-capacitive integrated units arranged along the first direction. Each first magneto-capacitive integrated unit includes: a first electromagnetic channel loop formed by connecting the ends of two non-adjacent first electromagnetic metal grid channels on one side of the channel, and a first capacitive metal grid channel located in the first electromagnetic channel loop; the driving surface includes a plurality of second magneto-capacitive integrated units arranged along the second direction. Each second magneto-capacitive integrated unit includes: a second electromagnetic channel loop formed by connecting the ends of two non-adjacent second electromagnetic metal grid channels on one side of the channel, and a second capacitive metal grid channel located in the second electromagnetic channel loop.

3. The touch display device according to claim 2, wherein peripheral metal wires are connected to the corresponding channel ends at the opposite ends of the loop of each first electromagnetic metal grid channel and the first capacitive metal grid channel in the first electromagnetic channel loop; peripheral metal wires are connected to the corresponding channel ends at the opposite ends of the loop of each second electromagnetic metal grid channel and the second capacitive metal grid channel in the second electromagnetic channel loop.

4. The touch display device according to claim 2, wherein the loop channel impedance of the first electromagnetic channel loop and the second electromagnetic channel loop is less than 2 kΩ.

5. The touch display device according to claim 2, wherein in each first magneto-capacitive integrated unit, the first capacitive metal grid channel is spaced apart from the two first electromagnetic metal grid channels on both sides by a first spacing; in each second magneto-capacitive integrated unit, the second capacitive metal grid channel is spaced apart from the two second electromagnetic metal grid channels on both sides by the first spacing, and the first spacing is greater than 0.

6. The touch display device according to claim 2, wherein two adjacent first magneto-capacitive integrated units are spaced apart by a second spacing; two adjacent second magneto-capacitive integrated units are spaced apart by the second spacing, and the second spacing is greater than or equal to 0.4 mm.

7. The touch display device according to claim 2, wherein the first capacitive metal grid channels in two adjacent first magneto-capacitive integrated units are spaced apart by a third spacing; The second capacitive metal grid channels in two adjacent second magneto-capacitive integrated units are separated by a third spacing, and the third spacing is less than or equal to five millimeters.

8. The touch display device according to claim 1, wherein the grid nodes corresponding to the first capacitive metal grid channel, the first electromagnetic metal grid channel, the second capacitive metal grid channel, and the second electromagnetic metal grid channel are greater than or equal to 2.

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