Electromagnetic-capacitive double-touch screen and touch display apparatus

Abstract

An electromagnetic-capacitive double-touch screen. A touch screen (10) comprises a substrate (16), a first touch electrode layer (101), and a second touch electrode layer (102); the first touch electrode layer (101) comprises a plurality of first induction wire groups (11), each first induction wire group (11) comprising two first conductors (110); the second touch electrode layer (102) comprises a plurality of second induction wire groups (12), two second conductors (120) being connected to form a U-shaped second induction wire group (12); the first conductors (110) and the second conductors (120) are connected by means of a conductor bridge structure (13); a touch detection circuit is connected to the first conductors (110) and the second conductors (120); a capacitive touch array (140) arranged on one of the first touch electrode layer (101) and the second touch electrode layer (102) comprises a plurality of first electrode assemblies (tx), and a plurality of second electrode assemblies (rx); and first electrodes (182) are connected to the first conductors (110), and second electrodes (181) are connected to the second conductors (120). The electromagnetic-capacitive touch screen integrates an electromagnetic-capacitive double-control function, such that the cost is reduced. In addition, further disclosed is a touch display apparatus comprising the electromagnetic-capacitive touch screen.

Description

Electromagnetic capacitance dual touch screen and touch display device Technical Field

[0001] The present application relates to the field of display technology, and in particular to an electromagnetic capacitive dual touch screen and a touch display device. Background Art

[0002] With the development of the touchscreen industry, demand for high-precision and multifunctional touchscreens is rapidly increasing. Existing capacitive touchscreens offer high sensitivity, convenient operation, and a good touch experience, but their touch speed and resolution are relatively low. Electromagnetic pen touch, on the other hand, offers extremely high touch speed and resolution, and provides authentic handwriting. Therefore, users are eager for touchscreens that integrate both capacitive and electromagnetic touch. SUMMARY OF THE INVENTION

[0003] The embodiments of the present application provide an electromagnetic and capacitive dual touch screen and a touch display device, which solve the technical problem that the touch screen cannot support both capacitive touch and electromagnetic touch at the same time.

[0004] In a first aspect, an embodiment of the present application provides an electromagnetic capacitive dual touch screen, comprising:

[0005] substrate;

[0006] a first touch electrode layer and a second touch electrode layer disposed on the same side of the substrate, wherein the second touch electrode layer is located between the substrate and the first touch electrode layer;

[0007] The first touch electrode layer includes a plurality of first sensing wire groups arranged at intervals along a first direction X, wherein the first sensing wire group includes two mutually parallel first conductors, and the two first conductors are connected to form a U-shaped first sensing wire group;

[0008] The second touch electrode layer includes a plurality of second sensing wire groups arranged at intervals along a second direction Y, wherein the second sensing wire group includes two second conductors parallel to each other, and the two second conductors are connected to form a U-shaped second sensing wire group; the second direction intersects the first direction;

[0009] a plurality of conductor bridge structures located in an overlapping region between the first conductor and the second conductor and provided on one of the first touch electrode layer and the second touch electrode layer, the first conductor and the second conductor being connected via the conductor bridge structures;

[0010] A touch detection circuit is connected to the first conductor and the second conductor, and is used to drive the first conductor and the second conductor to perform electromagnetic touch detection;

[0011] A capacitive touch array is provided on the other of the first touch electrode layer and the second touch electrode layer, the capacitive touch array including a plurality of first electrode groups arranged at intervals along a first direction X, the first electrode groups including two first electrodes arranged at intervals, and a plurality of second electrode groups arranged at intervals along a second direction Y, the second electrode groups including two second electrodes arranged at intervals, the first electrodes being connected to the first conductor, and the second electrodes being connected to the second conductor. The capacitive touch array is configured to cooperate with the touch detection circuit to perform capacitive touch detection or electromagnetic touch detection.

[0012] In a second aspect, an embodiment of the present application further provides a touch display device, comprising a display device and the electromagnetic capacitive dual touch screen described in the first aspect, wherein the display device and the electromagnetic capacitive dual touch screen are stacked. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0014] FIG1 is a schematic top view of an electromagnetic capacitive dual touch screen provided in an embodiment of the present application.

[0015] FIG2 is a partially enlarged schematic diagram of the electromagnetic capacitive dual touch screen provided in an embodiment of the present application.

[0016] FIG3 is a cross-sectional schematic diagram of the electromagnetic capacitive dual touch screen provided in an embodiment of the present application. Modes for Carrying Out the Invention

[0017] In a first aspect, an embodiment of the present application provides an electromagnetic capacitive dual touch screen, comprising:

[0018] substrate;

[0019] a first touch electrode layer and a second touch electrode layer disposed on the same side of the substrate, wherein the second touch electrode layer is located between the substrate and the first touch electrode layer;

[0020] The first touch electrode layer includes a plurality of first sensing wire groups arranged at intervals along a first direction X, wherein the first sensing wire group includes two mutually parallel first conductors, and the two first conductors are connected to form a U-shaped first sensing wire group;

[0021] The second touch electrode layer includes a plurality of second sensing wire groups arranged at intervals along a second direction Y, wherein the second sensing wire group includes two second conductors parallel to each other, and the two second conductors are connected to form a U-shaped second sensing wire group; the second direction intersects the first direction;

[0022] a plurality of conductor bridge structures located in an overlapping region between the first conductor and the second conductor and provided on one of the first touch electrode layer and the second touch electrode layer, the first conductor and the second conductor being connected via the conductor bridge structures;

[0023] A touch detection circuit is connected to the first conductor and the second conductor, and is used to drive the first conductor and the second conductor to perform electromagnetic touch detection;

[0024] A capacitive touch array is provided on the other of the first touch electrode layer and the second touch electrode layer, the capacitive touch array including a plurality of first electrode groups arranged at intervals along a first direction X, the first electrode groups including two first electrodes arranged at intervals, and a plurality of second electrode groups arranged at intervals along a second direction Y, the second electrode groups including two second electrodes arranged at intervals, the first electrodes being connected to the first conductor, and the second electrodes being connected to the second conductor. The capacitive touch array is configured to cooperate with the touch detection circuit to perform capacitive touch detection or electromagnetic touch detection.

[0025] In some embodiments, further comprising:

[0026] The material of the first conductor and the second conductor includes metal material;

[0027] The material of the conductor bridge structure includes insulating material.

[0028] In some embodiments, the conductor bridge structure, the first conductor, and the second conductor are alternately connected in sequence to surround a first electrode group and a second electrode group.

[0029] In some embodiments, further comprising:

[0030] a first connection terminal connected to the first electrode and the first conductor;

[0031] A second connection terminal is connected to the second electrode and the second conductor.

[0032] In some embodiments, the substrate is made of a transparent material.

[0033] In some embodiments, further comprising:

[0034] The touch detection circuit sequentially drives the first electrodes according to a first preset scanning sequence and simultaneously sends voltage signals to the plurality of second electrode groups;

[0035] The touch detection circuit determines a touch position according to a signal strength of the voltage signal received by the second electrode group.

[0036] In some embodiments, further comprising:

[0037] The touch detection circuit sequentially drives the second electrodes according to a second preset scanning sequence and simultaneously sends voltage signals to the plurality of first electrode groups;

[0038] The touch detection circuit determines a touch position according to a signal strength of the voltage signal received by the first electrode group.

[0039] In some embodiments, further comprising:

[0040] The touch detection circuit simultaneously drives one of the first conductors in the plurality of first sensing wire groups to send a voltage signal to another of the first conductors in the same group, and then simultaneously drives one of the second conductors in the plurality of second sensing wire groups to send a voltage signal to another of the second conductors in the same group;

[0041] The touch detection circuit determines a touch position according to a signal strength of the voltage signal received by the other second conductor and a signal strength of the voltage signal received by the other first conductor.

[0042] In a second aspect, an embodiment of the present application further provides a touch display device, comprising a display device and the electromagnetic capacitive dual touch screen described in the first aspect, wherein the display device and the electromagnetic capacitive dual touch screen are stacked.

[0043] In some embodiments, further comprising:

[0044] The touch detection circuit sequentially drives the first electrodes in a first preset scanning order and simultaneously sends voltage signals to the plurality of second electrode groups, and then sequentially drives the second electrodes in a second preset scanning order and simultaneously sends voltage signals to the plurality of first electrode groups;

[0045] The touch detection circuit determines a touch position according to the signal strength of the voltage signal received by the first electrode group and the signal strength of the voltage signal received by the second electrode group.

[0046] In some embodiments, further comprising:

[0047] The touch detection circuit simultaneously drives one of the first conductors in the plurality of first sensing wire groups to send a voltage signal to another of the first conductors in the same group, and then simultaneously drives one of the second conductors in the plurality of second sensing wire groups to send a voltage signal to another of the second conductors in the same group;

[0048] The touch detection circuit determines a touch position according to a signal strength of the voltage signal received by the other second conductor and a signal strength of the voltage signal received by the other first conductor.

[0049] The beneficial effects of the present application are as follows: the present application comprehensively designs capacitive touch and electromagnetic touch, and can realize two modes of touch: finger capacitive touch and electromagnetic pen electromagnetic touch. It has a simple structure, can reduce production difficulty, reduce consumables, improve the quality of the finished product and has low cost.

[0050] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0051] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "one end" and "the other end" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying 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 this 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, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of this application, "" means two or more, unless otherwise clearly and specifically defined.

[0052] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can mean a fixed connection, a detachable connection, or an integral connection; it can mean a mechanical connection, a connection, or the ability to communicate with each other; it can mean a direct connection, an indirect connection through an intermediate medium, or the internal communication between two elements or the interaction between two elements. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0053] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0054] As a positioning and input device for display devices, touch screens allow users to manipulate displayed content through touch, drag, and gestures, making them the simplest and most convenient form of human-computer interaction. With the continuous advancement of display technology, the demand for touch screens is increasing. In addition to finger touch, active pens are also required. Currently, the two main active pens used on the market are capacitive pens and electromagnetic pens.

[0055] However, existing touch screens generally support either capacitive pens or electromagnetic pens, or sacrifice screen thickness and cost to achieve the function of supporting both capacitive pens and electromagnetic pens. Therefore, it is necessary to improve this defect.

[0056] The electromagnetic capacitive dual touch screen in the embodiment of the present application can be used in mobile phones, tablet computers, desktop computers, laptop computers, e-readers, handheld computers, electronic display screens, notebook computers, ultra-mobile personal computers (UMPCs), netbooks, as well as cellular phones, personal digital assistants (PDAs), augmented reality (AR) and virtual reality (VR) devices, media players, wearable devices, digital cameras, car navigation systems, etc.

[0057] Please refer to Figures 1 to 3, which are schematic diagrams of the structure of the electromagnetic capacitive dual touch screen 10 provided in an embodiment of the present application. As shown in Figures 1 to 3, the electromagnetic capacitive dual touch screen 10 includes:

[0058] substrate 16;

[0059] A first touch electrode layer 101 and a second touch electrode layer 102 are provided on the same side of the substrate 16 , wherein the second touch electrode layer 102 is located between the substrate 16 and the first touch electrode layer 101 ;

[0060] The first touch electrode layer 101 includes a plurality of first sensing wire groups 11 arranged at intervals along a first direction X. The first sensing wire group 11 includes two first conductors 110 parallel to each other. The two first conductors 110 are connected to form a U-shaped first sensing wire group 11.

[0061] The second touch electrode layer 102 includes a plurality of second sensing wire groups 12 arranged at intervals along a second direction Y. The second sensing wire group 12 includes two second conductors 120 parallel to each other. The two second conductors 120 are connected to form a U-shaped second sensing wire group 12. The second direction Y intersects the first direction X.

[0062] a plurality of conductor bridge structures 13 located in an overlapping region between the first conductor 110 and the second conductor 120 and provided on one of the first touch electrode layer 101 and the second touch electrode layer 102 , wherein the first conductor 110 and the second conductor 120 are connected via the conductor bridge structures 13 ;

[0063] A touch detection circuit (not shown) is connected to the first conductor 110 and the second conductor 120 and is used to drive the first conductor 110 and the second conductor 120 to perform electromagnetic touch detection;

[0064] A capacitive touch array 140 is provided on the other of the first touch electrode layer 101 and the second touch electrode layer 102. The capacitive touch array 140 includes a plurality of first electrode groups tx arranged at intervals along a first direction X, each of the first electrode groups tx including two first electrodes 182 spaced apart from each other, and a plurality of second electrode groups rx arranged at intervals along a second direction Y, each of the second electrode groups rx including two second electrodes 181 spaced apart from each other. The first electrodes 182 are connected to the first conductor 110, and the second electrodes 181 are connected to the second conductor 120. The capacitive touch array 140 is configured to cooperate with the touch detection circuit to perform capacitive touch detection or electromagnetic touch detection.

[0065] In some embodiments, the substrate 16 is made of a transparent material. Specifically, the substrate 16 is made of glass, plastic, a flexible circuit board, polyethylene, or an insulating film. Depending on the application, the substrate 16 can be made of glass, plastic, a flexible circuit board, polyethylene, or an insulating film. For example, in applications requiring a flexible touch array, plastic or an insulating film is typically used as the material for the substrate 16. Those skilled in the art may choose to use the appropriate material based on the specific application requirements, and this application does not impose any limitations thereon.

[0066] Furthermore, a transparent material is typically used as substrate 16. To minimize the thickness of substrate 16, it should typically be less than or equal to 3 mm. Of course, given the varying strengths and processing requirements of different substrate 16 materials, the aforementioned thickness should vary depending on the material. For example, the thickness of glass substrate 16 can be set to 0.5-2.0 mm, that of flexible printed circuit boards to 0.2-0.6 mm, that of polyethylene to 1.0-2 mm, and highly flexible and tensile-strength insulating films to 0.2 mm or less.

[0067] Specifically, as shown in Figure 3, the electromagnetic capacitive dual touch screen 10 includes a substrate 16, a first touch electrode layer 101 and a second touch electrode layer 102 stacked in sequence along a third direction. That is, the first touch electrode layer 101 and the second touch electrode layer 102 are located on the same side of the substrate 16 along the third direction, and the second touch electrode layer 102 is located between the substrate 16 and the first touch electrode layer 101 along the third direction.

[0068] As shown in Figures 1 and 2 , the first touch electrode layer 101 includes a plurality of first sensing wire groups 11 extending along a second direction Y, and the plurality of first sensing wire groups 11 are arranged in intervals along a first direction X. Each first sensing wire group 11 includes two first conductors 110 extending parallel to each other along the first direction X. The two first conductors 110 are connected by a first connecting portion 110c to form a U-shaped first sensing wire group 11. Exemplarily, as shown in Figure 2 , the first sensing wire group 11 includes a first conductor 110a and another first conductor 110b, with the first conductor 110a and the second first conductor 110b connected by a first connecting portion 110c to form a U-shaped first sensing wire group 11.

[0069] As shown in Figures 1 and 2 , the second touch electrode layer 102 includes a plurality of second sensing wire groups 12 extending along a first direction X, and the plurality of second sensing wire groups 12 are arranged in intervals along a second direction Y. Each second sensing wire group 12 includes two second conductors 120110 that are parallel to each other along the second direction Y. The two second conductors 120 are connected by a second connecting portion 120c to form a U-shaped second sensing wire group 12. For example, as shown in Figure 3 , the second sensing wire group 12 includes a second conductor 120a and another second conductor 120b, with the second conductors 120a and 120b connected by a second connecting portion 120c to form a U-shaped second sensing wire group 12.

[0070] Specifically, as shown in Figures 2 and 3 , one of the first touch electrode layer 101 and the second touch electrode layer 102 includes multiple conductive bridge structures 13. The other of the first touch electrode layer 101 and the second touch electrode layer 102 includes a capacitive touch array 140. The capacitive touch array 140 includes two first electrodes 182 spaced apart along the second direction Y, namely a first electrode group tx, and two second electrodes 181 spaced apart along the first direction X, namely a second electrode group rx. In other words, the capacitive touch array 140 includes multiple rows of first electrode groups tx spaced apart along the second direction Y and multiple columns of second electrode groups rx spaced apart along the first direction X, forming multiple touch sensing units 14. Each touch sensing unit 14 is surrounded by four conductor bridge structures 13, two first conductors 110, and two second conductors 120. The four conductor bridge structures 13, two first conductors 110, and two second conductors 120 are alternately connected around each touch sensing unit 14 in the order of one conductor bridge structure 13, one first conductor 110, and one second conductor 120. As shown in FIG2 , a conductor bridge structure 13a, a conductor bridge structure 13b, a conductor bridge structure 13c, and a conductor bridge structure 13d surround a touch sensing unit 14.

[0071] Because the first sensing wire group 11 and the second sensing wire group 12 are located in different layers, that is, the first sensing wire group 11 is located in the first touch electrode layer 101 and the second sensing wire group 12 is located in the second touch electrode layer 102, and one of the first touch electrode layer 101 and the second touch electrode layer 102 includes multiple conductive bridge structures 13, and the other of the first touch electrode layer 101 and the second touch electrode layer 102 includes a capacitive touch array 140, the conductive bridge structures 13 are provided in the same layer as one of the first sensing wire group 11 and the second sensing wire group 12, and the capacitive touch array 140 is provided in the same layer as the other of the first sensing wire group 11 and the second sensing wire group 12, neither the thickness of the screen nor the manufacturing process is increased.

[0072] As shown in FIG3 , the first sensing wire group 11 includes two first conductors 110 parallel to each other along a second direction Y, and the second sensing wire group 12 includes two second conductors 120 parallel to each other along a first direction X. It should be noted that in the embodiment of the present application, the first direction X and the second direction Y are perpendicular to each other, that is, the angle formed by the first direction X and the second direction Y is 90°. Of course, the angle formed by the intersection of the first sensing wire group 11 and the second sensing wire group 12 can also be set to be greater than 0° but less than 90°. In this embodiment, as shown in FIG2 and FIG3 , the first direction X is designated as the X direction, and the second direction Y is designated as the Y direction, where the X direction is perpendicular to the Y direction.

[0073] As shown in Figures 2 and 3, multiple first sensing wire groups 11 are arranged in a first direction X, each comprising two mutually parallel first conductors 110. Multiple second sensing wire groups 12 are arranged in a second direction Y, each comprising two mutually parallel second conductors 120. Furthermore, the first direction X intersects the second direction Y. Consequently, multiple overlapping regions are formed between the multiple first conductors 110 and the multiple second conductors 120. To prevent interference between the first and second conductors 110, 120, conductor bridge structures 13 are provided in the overlapping regions. While the conductor bridge structures 13 connect the first and second conductors 110, 120, they also electrically isolate the first and second conductors 110, 120 from shorting each other. The first conductors 110 in a row are electrically connected sequentially via the conductor bridge structures 13, and the second electrodes 181 in a column are electrically connected sequentially via the conductor bridge structures 13.

[0074] As shown in Figures 1 to 3, the touch detection circuit is connected to the first conductor 110 in the first touch electrode layer 101, and the touch detection circuit is connected to the second conductor 120 in the second touch electrode layer 102. The touch detection circuit drives the first conductor 110 and the second conductor 120 to perform electromagnetic touch detection.

[0075] In the embodiment of the present application, the electromagnetic and capacitive dual touch screen 10 includes a capacitive touch array 140 for detecting finger touch signals or capacitive stylus touch signals. By disposing mutually parallel second sensing wire groups 12 on both sides of the touch sensing units 14 in the capacitive touch array 140 along a first direction X, and disposing mutually parallel first sensing wire groups 11 on both sides of the capacitive touch array 140 along a second direction Y, the capacitive touch array 140 can be reused in conjunction with the first sensing wire group 11 and the second sensing wire group 12 to form an electromagnetic sensing array. In other words, the capacitive touch array 140 and the touch detection circuit of the above embodiment work together to implement capacitive touch detection, and the capacitive touch array 140, the first sensing wire group 11, the second sensing wire group 12, and the touch detection circuit work together to implement electromagnetic touch detection. The problem that display devices in the prior art can only support capacitive pen or electromagnetic pen touch is solved. The present invention realizes the function of being compatible with both capacitive pen and electromagnetic pen touch modes. No additional EMR (Electro Magnetic Resonance technology) sensor for realizing electromagnetic touch function is required. Capacitive touch function can be realized with the cooperation of touch detection circuit and capacitive touch array 140. On the basis of capacitive touch array 140, U-shaped first sensing wire group 11 and second sensing wire group 12 are arranged on the same layer around the capacitive touch array 140. In addition, with the cooperation of touch detection circuit, the capacitive touch array 140 can also be reused to realize electromagnetic touch function. This achieves the integration of electromagnetic touch and capacitive touch, and has the advantages of reducing screen thickness and lowering the cost of dual touch.

[0076] It is understandable that the most common way to implement electromagnetic touch on a capacitive touch screen in the prior art is to add an additional layer of electromagnetic induction coils. This method not only increases the thickness of the screen, but also increases the process, resulting in excessively high production costs. The present application integrates the capacitive touch array 140 or one of the conductor bridge structures 13 and the first sensing wire group 11 into the first touch electrode layer 101, and integrates the capacitive touch array 140 or the other of the conductor bridge structure 13 and the second sensing wire group 12 into the second touch electrode layer 102. This allows the touch screen to support both capacitive touch and electromagnetic touch, providing more comprehensive functions and increased touch compatibility. Users can use the touch screen in different scenarios according to their different needs, thereby meeting more demands for the touch screen, making touch more flexible and convenient, saving costs, and improving the user experience. Furthermore, the capacitive touch array 140 or one of the conductive bridge structures 13 is disposed on the same layer as the first sensing wire group 11, and the other of the capacitive touch array 140 or the conductive bridge structure 13 is disposed on the same layer as the second sensing wire group 12. This does not increase the thickness of the touch screen or the manufacturing process, thereby saving production costs.

[0077] In some embodiments, further comprising:

[0078] The material of the first conductor 110 and the second conductor 120 includes metal material;

[0079] The conductor bridge structure 13 is made of insulating material.

[0080] Specifically, based on the same reasons for selecting the material for substrate 16, in different applications, the materials for the first conductor 110 and the second conductor 120 can be nickel, platinum, copper, selenium, cobalt, aluminum, copper, metal foil, conductive silver paste, carbon paste, ITO (indium tin oxide) conductive film, organic conductive wire, conductive rubber, enameled wire, etc. For example, in a touch array used on a display screen, ITO conductive film can be used as the material for the first conductor 110 and the second conductor 120; while in an electronic whiteboard, enameled wire can be used. Of course, this application does not limit the use of a combination of the above-mentioned materials. The material for the conductor bridge structure 13 includes one or more insulating materials selected from silicon oxide, silicon oxynitride, lanthanum oxide, zirconium dioxide, and polyethylene. The electromagnetic capacitive dual touch screen 10 in any of the above-mentioned embodiments has a very simple structure, is easy to mass-produce, and can be applied to various touch products.

[0081] In some embodiments, the conductor bridge structure 13 , the first conductor 110 , and the second conductor 120 are alternately connected in sequence around a first electrode group tx and a second electrode group rx.

[0082] Specifically, as shown in Figures 2 and 3, a touch sensing unit 14 includes a first electrode group tx and a second electrode group rx. One of the first touch electrode layer 101 and the second touch electrode layer 102 includes multiple conductive bridge structures 13. The other of the first touch electrode layer 101 and the second touch electrode layer 102 includes multiple touch sensing units 14. The touch sensing units 14 include two first electrodes 182 spaced apart along the second direction Y and two second electrodes 181 spaced apart along the first direction X. In other words, the touch detection circuit includes multiple rows of first electrodes 182 spaced apart along the second direction Y and multiple columns of second electrodes 181 spaced apart along the first direction X. Each of the touch sensing units 14 is surrounded by four conductor bridge structures 13, two first conductors 110, and two second conductors 120. Furthermore, the four conductor bridge structures 13, two first conductors 110, and two second conductors 120 are alternately connected around one touch sensing unit 14 in the order of one conductor bridge structure 13, one first conductor 110, and one second conductor 120.

[0083] In some embodiments, further comprising:

[0084] a first connection terminal 111 connected to the first electrode 182 and the first conductor 110;

[0085] a second connection terminal 121 connected to the second electrode 181 and the second conductor 120 .

[0086] Specifically, as shown in Figures 2 and 3, each touch sensing unit 14 is connected to a first conductor 110 via a first connection terminal. Since each touch sensing unit 14 (or each first electrode group tx and each second electrode group rx) is surrounded by two first conductors 110, each touch sensing unit 14 is connected to two first conductors 110 that are oppositely disposed along the first direction X and extend along the second direction Y, respectively, via two first connection terminals disposed oppositely along the first direction X. Similarly, each touch sensing unit 14 is connected to a second conductor 120 via a second connection terminal. Since each touch sensing unit 14 (or each first electrode group tx and each second electrode group rx) is surrounded by two second conductors 120, each touch sensing unit 14 is connected to two second conductors 120 that are oppositely disposed along the second direction Y and extend along the first direction X, respectively, via two second connection terminals disposed oppositely along the second direction Y.

[0087] In some embodiments, each first electrode 182 is separated from the second electrode 181 by an insulating layer to form mutual capacitance. Furthermore, two first electrodes 182 in the same first electrode group tx are separated by an insulating layer to form mutual capacitance, and two second electrodes 181 in each second electrode group rx are separated by an insulating layer to form mutual capacitance. The insulating layer can be an inorganic layer such as SiNx or SiO2, or an organic layer such as OC, but is not limited thereto.

[0088] In some embodiments, the first electrode 182 and the second electrode 181 can be formed of metal mesh or indium tin oxide (ITO) materials, but are not limited thereto. Metal mesh or indium tin oxide (ITO) technology is relatively mature, with high process reliability and high yield.

[0089] In some embodiments, further comprising:

[0090] The touch detection circuit sequentially drives the first electrodes 182 in accordance with a first preset scanning sequence and simultaneously sends voltage signals to the plurality of second electrode groups rx;

[0091] The touch detection circuit determines a touch position according to a signal strength of the voltage signal received by the second electrode group rx.

[0092] Specifically, as shown in Figures 2 and 3, the capacitive touch array 140 includes a plurality of first electrodes 182 arranged at intervals along a first direction X and a plurality of second electrodes 181 arranged at intervals along a second direction Y. When the first electrodes 182 serve as touch driving electrodes, the second electrodes 181 can serve as touch sensing electrodes. Similarly, when the first electrodes 182 serve as touch sensing electrodes, the second electrodes 181 can serve as touch driving electrodes.

[0093] FIG1 shows 16 first electrode groups tx arranged horizontally and vertically, 16 second electrode groups rx arranged horizontally and vertically, 32 first electrodes 182, and 32 second electrodes 181. The number of first electrodes 182 and second electrodes 181 in FIG1 is merely an example. Capacitive touch arrays 140 including a greater or lesser number of first electrodes 182 and second electrodes 181 are within the scope of protection of this application. FIG1 shows four first sensing wire groups 11 arranged horizontally and vertically, spaced apart along a first direction X, and four second sensing wire groups 12 arranged horizontally and vertically, spaced apart along a second direction Y. The number of first sensing wire groups 11 and second sensing wire groups 12 in FIG1 is merely an example. Electromagnetic capacitive dual touch screens 10 including a greater or lesser number of first sensing wire groups 11 and second sensing wire groups 12 are within the scope of protection of this application.

[0094] The touch detection circuit has multiple first electrode pins (not shown), with each first electrode 182 connected to the touch detection circuit via a first electrode pin. The touch detection circuit has multiple second electrode pins (not shown), with each second electrode 181 connected to the detection circuit via a second electrode pin. The touch detection circuit sequentially provides drive signals to each first electrode 182 according to a pre-set scanning sequence. The first electrodes 182 that receive the drive signals sequentially transmit voltage signals to each second electrode 181 in the order in which they received the drive signals. This causes all second electrodes 181 in the plurality of second electrode groups rx to simultaneously output corresponding electrical signals (i.e., post-received voltage signals) through capacitive sensing and transmit these sensed post-received voltage signals to the touch detection circuit. The touch detection circuit can determine the touch location based on the electrical signals sensed by each second electrode 181. For example, assuming the touch location occurs at (rx2, tx2), when rx2 is scanned, the output signal of tx2 will change.

[0095] For example, as shown in FIG1 , assuming that a hand or capacitive stylus is not placed on the touch screen including the capacitive touch array 140 shown in FIG1 , and assuming that when the touch circuit drives tx1 to transmit a voltage signal, rx1 through rx4 are all receiving the voltage signal transmitted by tx1, and the signal strengths received by rx1 through rx4 are similar, if a hand or capacitive stylus is placed at the intersection of rx2 and tx1, the signal strength of the voltage signal received by rx2 will differ from that before. This means that the mutual capacitance reduces the signal strength of the voltage signal, thereby enabling the approximate touch location to be calculated. Since the size of a finger is generally larger than the size of the touch sensing unit 14, for example, if the finger is 7 cm and the pitch of 2 is about 4 cm, when the finger touches (rx2, tx1), the fingertips may partially cover the nodes of rx1 and rx3. Therefore, based on the attenuation ratio of the voltage signals received by rx1 and rx3, the signal strength of the voltage signal at (rx2, tx1) is the largest, and the signal strength of the voltage signal at (rx1, tx1) is greater than (rx3, tx1) and less than (rx2, tx1), then it can be determined that the finger is located at (rx2, tx1) and is biased towards the position of (rx1, tx1).

[0096] In some embodiments, further comprising:

[0097] The touch detection circuit sequentially drives the second electrodes 181 according to a second preset scanning sequence and simultaneously sends voltage signals to the plurality of first electrode groups tx;

[0098] The touch detection circuit determines a touch position according to a signal strength of the voltage signal received by the first electrode group tx.

[0099] Specifically, the touch detection circuit provides drive signals to each second electrode 181 in sequence according to a set second preset scanning sequence. The second electrodes 181 that receive the drive signals sequentially send voltage signals to each first electrode 182 in the order in which they received the drive signals. This causes all first electrodes 182 in the plurality of first electrode groups tx to simultaneously output corresponding electrical signals (i.e., post-received voltage signals) through capacitive sensing and transmit the sensed post-received voltage signals to the touch detection circuit. The touch detection circuit can determine the touch location based on the corresponding electrical signals sensed and output by each first electrode 182. For example, assuming the touch location occurs at (rx2, tx2), when tx2 is scanned, the output signal of rx2 will change.

[0100] For example, as shown in FIG1 , assuming that a hand or capacitive stylus is not placed on the touch screen including the capacitive touch array 140 shown in FIG1 , and assuming that when the touch circuit drives rx1 to send a voltage signal, tx1 to tx4 are all receiving the voltage signal sent by rx1, and the signal strengths received by tx1 to tx4 are similar. If a hand or capacitive stylus is placed at the intersection of tx2 and rx1, the signal strength of the voltage signal received by tx2 will be different from that before. In other words, the mutual capacitance reduces the signal strength of the voltage signal, thereby allowing the approximate touch location to be calculated. Since the size of a finger is generally larger than the size of the touch sensing unit 14, for example, if the finger is 7 cm and the pitch of 2 is about 4 cm, when the finger touches (tx2, rx1), the fingertips may partially cover the nodes of tx1 and tx3. Therefore, according to the attenuation ratio of the voltage signals received by tx1 and tx3, the signal strength of the voltage signal at (tx2, rx1) is the largest, and the signal strength of the voltage signal at (tx1, rx1) is greater than (tx3, rx1) and less than (tx2, rx1), then it can be determined that the finger is located at (tx2, rx1) and biased towards the position of (tx1, rx1).

[0101] In some embodiments, further comprising:

[0102] The touch detection circuit simultaneously drives one of the first conductors 110 in the plurality of first sensing wire groups 11 to send a voltage signal to another of the first conductors 110 in the same group, and simultaneously drives one of the second conductors 120 in the plurality of second sensing wire groups 12 to send a voltage signal to another of the second conductors 120 in the same group;

[0103] The touch detection circuit determines a touch position according to the signal strength of the voltage signal received by the other second conductor 120 and the signal strength of the voltage signal received by the other first conductor 110 .

[0104] Specifically, as shown in Figures 2 and 3, the capacitive touch array 140 includes a plurality of first electrodes 182 arranged at intervals along a first direction X and a plurality of second electrodes 181 arranged at intervals along a second direction Y. When the first electrodes 182 serve as touch driving electrodes, the second electrodes 181 can serve as touch sensing electrodes. Similarly, when the first electrodes 182 serve as touch sensing electrodes, the second electrodes 181 can serve as touch driving electrodes.

[0105] Specifically, the touch detection circuit has a plurality of first conductor pins (not shown). Each first sensing wire group 11 is connected to the touch detection circuit via a first conductor pin. In other words, the two first conductors 110 in each first sensing wire group 11 are connected to the touch detection circuit via a first conductor pin. The touch detection circuit has a plurality of second conductor pins (not shown). Each second conductor 120 is connected to the detection circuit via a second conductor pin. In other words, the two second conductors 120 in each second sensing wire group 12 are connected to the touch detection circuit via a second conductor pin.

[0106] The touch detection circuit provides a driving signal to a first conductor 110 in each first sensing wire group 11. Each first conductor 110 that receives the driving signal transmits a voltage signal to another first conductor 110 in the same group. Consequently, the voltage signal flows through each first conductor 110 in the first sensing wire group 11 and is then transmitted to another first conductor 110 in the same group. In this case, each first conductor 110 in the first sensing wire group 11 functions as a transformer primary. The touch detection circuit then provides a driving signal to a second conductor 120 in each second sensing wire group 12. Each second conductor 120 that receives the driving signal transmits a voltage signal to another second conductor 120 in the same group. Consequently, the voltage signal flows through each second conductor 120 in the second sensing wire group 12 and is then transmitted to another second conductor 120 in the same group. In this case, each second conductor 120 in the second sensing wire group 12 functions as a transformer primary. During this process, scanning occurs simultaneously. Each (group) of the first electrode groups tx, acting as transmitters, sends voltage signals to charge the electromagnetic pen, which are simultaneously received by each second electrode group rx, completing a full-screen scan. Then, each (group) of the second electrode groups rx, acting as transmitters, sends voltage signals to charge the electromagnetic pen, which are simultaneously received by each first electrode group tx, completing a second full-screen scan. At this point, the electromagnetic pen, acting as a receiver, receives AC power coupled from the U-shaped screen coil 15 (including the first conductor 110 or the second conductor 120). This resonates with the circuit formed by the coil within the electromagnetic pen, accumulating electrical energy through an LC oscillator circuit. When the electromagnetic pen is in use, energy is stored through coupling with the U-shaped screen coil 15 (including the first conductor 110 or the second conductor 120). The U-shaped screen coil 15 charges the electromagnetic pen, causing some of the energy in the U-shaped screen coil 15 to flow to the electromagnetic pen. The electromagnetic pen, in this case, functions like the secondary side of a transformer.

[0107] If the electromagnetic pen is used as the transmitting end, the energy stored in the coil inside the electromagnetic pen is sent in the form of an electromagnetic signal (RF). At this time, the electromagnetic pen is similar to the primary of a transformer. The U-shaped screen coil 15 (including the first conductor 110 or the second conductor 120) is used as the receiving end. According to the principle of magnetoelectricity, the U-shaped screen coil 15 (including the first conductor 110 or the second conductor 120) can convert the electromagnetic signal sent by the electromagnetic pen into a voltage signal, and transmit it to the first electrode 182 or the second electrode 181 through the first terminal or the second terminal. The touch detection circuit calculates and identifies the touch position of the electromagnetic pen based on the signal strength of the voltage signal transmitted by the U-shaped screen coil 15 (including the first conductor 110 or the second conductor 120) to the first electrode 182 or the second electrode 181. At this time, the U-shaped screen coil 15 (including the first conductor 110 or the second conductor 120) is similar to the secondary of a transformer. For example,

[0108] It is understood that the present application utilizes the existing process technology for the capacitive touch array 140 and the process technology for the substrate 16, respectively placing the capacitive touch array 140 or the conductive bridge structure 13 and the U-shaped first sensing wire group 11 within the first touch electrode layer 101, and integrating the other of the capacitive touch array 140 or the conductive bridge structure 13 and the U-shaped second sensing wire group 12 within the second touch electrode layer 102. This allows the touch screen to satisfy both capacitive touch and electromagnetic touch. When the touch screen provided by the present application is touched using a finger or a capacitive stylus, the first electrode 182 (rx) and the second electrode 181 (tx) operate to process data, thereby achieving capacitive touch. When the touch screen is touched using an electromagnetic stylus, the U-shaped first sensing wire group 11 and the U-shaped second sensing wire group 12 operate to process data, thereby achieving electromagnetic touch. The determination of whether the touch is capacitive touch or electromagnetic touch can be implemented using existing algorithms, etc., so that they do not interfere with each other.

[0109] An embodiment of the present application further provides a touch display device, comprising a display device and the electromagnetic capacitive dual touch screen 10 described in the above embodiment, wherein the display device and the electromagnetic capacitive dual touch screen 10 are stacked.

[0110] In some embodiments, further comprising:

[0111] The touch detection circuit simultaneously drives one of the first conductors 110 in the plurality of first sensing wire groups 11 to send a voltage signal to another of the first sensing wire groups 11 in the same group, and simultaneously drives one of the second conductors 120 in the plurality of second sensing wire groups 12 to send a voltage signal to another of the second conductors 120 in the same group;

[0112] The touch detection circuit determines a touch position according to the signal strength of the voltage signal received by the other second conductor 120 and the signal strength of the voltage signal received by the other first conductor 110 .

[0113] The touch display device integrated with a touch screen provided in the embodiments of the present application may be a product or component with a display function, such as a mobile phone, a tablet computer, a laptop computer, a digital camera, and a navigator.

[0114] It should be noted that, in specific implementation, the above modules can be implemented as independent entities, or can be arbitrarily combined and implemented as the same or several entities. The specific implementation of the above modules can be found in the previous method embodiments and will not be repeated here.

[0115] The above is a detailed introduction to an electromagnetic capacitive dual touch screen 10 and a touch display device provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application; ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An electromagnetic capacitive dual touch screen, wherein: include: substrate; a first touch electrode layer and a second touch electrode layer disposed on the same side of the substrate, wherein the second touch electrode layer is located between the substrate and the first touch electrode layer; The first touch electrode layer includes a plurality of first sensing wire groups arranged at intervals along a first direction X, the first sensing wire group includes two first conductors parallel to each other, and the two first conductors are connected to form a U-shaped first sensing wire group; The second touch electrode layer includes a plurality of second sensing wire groups arranged at intervals along a second direction Y, the second sensing wire group includes two second conductors parallel to each other, the two second conductors are connected to form a U-shaped second sensing wire group; the second direction crosses the first direction; a plurality of conductor bridge structures located at an overlapping region between the first conductor and the second conductor and disposed on one of the first touch electrode layer and the second touch electrode layer, wherein the first conductor and the second conductor are connected via the conductor bridge structures; A touch detection circuit is connected to the first conductor and the second conductor, and is used to drive the first conductor and the second conductor to perform electromagnetic touch detection; A capacitive touch array is provided on the other of the first touch electrode layer and the second touch electrode layer, the capacitive touch array includes a plurality of first electrode groups arranged at intervals along a first direction X, the first electrode group includes two first electrodes arranged at intervals, and a plurality of second electrode groups arranged at intervals along a second direction Y, the second electrode group includes two second electrodes arranged at intervals, the first electrode is connected to the first conductor, the second electrode is connected to the second conductor, and the capacitive touch array is used to cooperate with the touch detection circuit to perform capacitive touch detection or the electromagnetic touch detection.

2. The electromagnetic capacitive dual touch screen according to claim 1, wherein: Also includes: The material of the first conductor and the second conductor includes metal material; The material of the conductor bridge structure includes insulating material.

3. The electromagnetic capacitive dual touch screen according to claim 1, wherein: The conductor bridge structure, the first conductor and the second conductor are alternately connected in sequence to surround a first electrode group and a second electrode group.

4. The electromagnetic capacitive dual touch screen according to claim 1, wherein: Also includes: a first connection terminal connected to the first electrode and the first conductor; A second connection terminal is connected to the second electrode and the second conductor.

5. The electromagnetic capacitive dual touch screen according to claim 1, wherein: The substrate is made of transparent material.

6. The electromagnetic capacitive dual touch screen according to claim 1, wherein: Also includes: The touch detection circuit sequentially drives the first electrodes according to a first preset scanning sequence and simultaneously sends voltage signals to a plurality of the second electrode groups; The touch detection circuit determines a touch position according to a signal strength of the voltage signal received by the second electrode group.

7. The electromagnetic capacitive dual touch screen according to claim 6, wherein: Also includes: The material of the first conductor and the second conductor includes metal material; The material of the conductor bridge structure includes insulating material.

8. The electromagnetic capacitive dual touch screen according to claim 6, wherein: The conductor bridge structure, the first conductor and the second conductor are alternately connected in sequence to surround a first electrode group and a second electrode group.

9. The electromagnetic capacitive dual touch screen according to claim 6, wherein: Also includes: a first connection terminal connected to the first electrode and the first conductor; A second connection terminal is connected to the second electrode and the second conductor.

10. The electromagnetic capacitive dual touch screen according to claim 6, wherein: The substrate is made of transparent material.

11. The electromagnetic capacitive dual touch screen according to claim 1, wherein: Also includes: The touch detection circuit sequentially drives the second electrodes according to a second preset scanning sequence and simultaneously sends voltage signals to the plurality of first electrode groups; The touch detection circuit determines a touch position according to a signal strength of the voltage signal received by the first electrode group.

12. The electromagnetic capacitive dual touch screen according to claim 11, wherein: Also includes: The material of the first conductor and the second conductor includes metal material; The material of the conductor bridge structure includes insulating material.

13. The electromagnetic capacitive dual touch screen according to claim 11, wherein: The conductor bridge structure, the first conductor and the second conductor are alternately connected in sequence to surround a first electrode group and a second electrode group.

14. The electromagnetic capacitive dual touch screen according to claim 11, wherein: Also includes: a first connection terminal connected to the first electrode and the first conductor; A second connection terminal is connected to the second electrode and the second conductor.

15. The electromagnetic capacitive dual touch screen according to claim 1, wherein: Also includes: The touch detection circuit simultaneously drives one of the first conductors in the plurality of first sensing wire groups to send a voltage signal to another of the first conductors in the same group, and then simultaneously drives one of the second conductors in the plurality of second sensing wire groups to send a voltage signal to another of the second conductors in the same group; The touch detection circuit determines a touch position according to a signal strength of the voltage signal received by the other second conductor and a signal strength of the voltage signal received by the other first conductor.

16. The electromagnetic capacitive dual touch screen according to claim 15, wherein: Also includes: The material of the first conductor and the second conductor includes metal material; The material of the conductor bridge structure includes insulating material.

17. The electromagnetic capacitive dual touch screen according to claim 15, wherein: The conductor bridge structure, the first conductor and the second conductor are alternately connected in sequence to surround a first electrode group and a second electrode group.

18. The electromagnetic capacitive dual touch screen according to claim 15, wherein: Also includes: a first connection terminal connected to the first electrode and the first conductor; A second connection terminal is connected to the second electrode and the second conductor.

19. A touch display device, wherein: It includes a display device and an electromagnetic capacitive dual touch screen, and the electromagnetic capacitive dual touch screen includes: substrate; a first touch electrode layer and a second touch electrode layer disposed on the same side of the substrate, wherein the second touch electrode layer is located between the substrate and the first touch electrode layer; The first touch electrode layer includes a plurality of first sensing wire groups arranged at intervals along a first direction X, the first sensing wire group includes two first conductors parallel to each other, and the two first conductors are connected to form a U-shaped first sensing wire group; The second touch electrode layer includes a plurality of second sensing wire groups arranged at intervals along a second direction Y, the second sensing wire group includes two second conductors parallel to each other, the two second conductors are connected to form a U-shaped second sensing wire group; the second direction crosses the first direction; a plurality of conductor bridge structures located at an overlapping region between the first conductor and the second conductor and disposed on one of the first touch electrode layer and the second touch electrode layer, wherein the first conductor and the second conductor are connected via the conductor bridge structures; A touch detection circuit is connected to the first conductor and the second conductor, and is used to drive the first conductor and the second conductor to perform electromagnetic touch detection; a capacitive touch array provided on the other of the first touch electrode layer and the second touch electrode layer, the capacitive touch array comprising a plurality of first electrode groups arranged at intervals along a first direction X, the first electrode groups comprising two first electrodes arranged at intervals relative to each other, and a plurality of second electrode groups arranged at intervals along a second direction Y, the second electrode groups comprising two second electrodes arranged at intervals relative to each other, the first electrodes being connected to the first conductor, the second electrodes being connected to the second conductor, the capacitive touch array being used to cooperate with the touch detection circuit to perform capacitive touch detection or the electromagnetic touch detection; Wherein, the display device and the electromagnetic capacitance dual touch screen are stacked.

20. The touch display device according to claim 19, wherein: Also includes: The touch detection circuit simultaneously drives one of the first conductors in the plurality of first sensing wire groups to send a voltage signal to another of the first conductors in the same group, and then simultaneously drives one of the second conductors in the plurality of second sensing wire groups to send a voltage signal to another of the second conductors in the same group; The touch detection circuit determines a touch position according to a signal strength of the voltage signal received by the other second conductor and a signal strength of the voltage signal received by the other first conductor.

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