Electromagnetic touch module, writing device and electronic equipment

Abstract

The utility model discloses an electromagnetic touch control module, a writing device and electronic equipment, and relates to the technical field of touch control, and the electromagnetic touch control module comprises a flexible transparent touch control film, a controller and a data transmission module. The flexible transparent touch film is used for separably covering an external writing substrate and comprises a base material and an electromagnetic sensor arranged on the surface of the base material; the controller is electrically connected with the flexible transparent touch film and comprises an electromagnetic sensor driver and a control chip; and the data transmission module is electrically connected with the control chip and is used for carrying out data transmission with external equipment. Due to the fact that the flexible transparent touch control film can be torn off from the writing substrate and covers other writing substrates for writing, the universality of the flexible transparent touch control film is better, and some objects which do not have the electromagnetic pen writing function originally can have the electromagnetic pen writing function.

Description

Technical Field

[0001] The utility model relates to the field of touch control technology, and in particular to an electromagnetic touch control module, a writing device and an electronic device. Background Art

[0002] Some devices include a writing panel and an electromagnetic film inside the writing panel, the electromagnetic film includes a metal grid sensor, when the electromagnetic pen moves on the writing panel, the magnetic field brought by the electromagnetic pen sensed by the metal grid sensor will change, and the movement trajectory of the electromagnetic pen can be calculated based on the change in the magnetic field.

[0003] In the prior art, the electromagnetic film is integrated under the writing panel, and the writing panel may be a display screen with display function. In this case, the device using the electromagnetic film may be, for example, a mobile phone or an ink screen product, and its cost is relatively high. The writing panel may also be an insulating hard board without display function. In this case, the device using the electromagnetic film may be, for example, a digital tablet, a signature board (at a bank counter), or an electronic drawing board, and its handwriting needs to be connected to a display screen to be visible, which is inconvenient to write.

[0004] In the prior art, the electromagnetic film is integrated inside the electronic device, which has poor versatility. For products without the electromagnetic film, the electromagnetic pen cannot write, and the overall cost of the electronic device is high.

[0005] Therefore, it is necessary to improve the prior art to overcome the above defects in the prior art. Utility Model Content

[0006] The utility model aims to provide an electromagnetic touch module, a writing device and an electronic device, wherein the electromagnetic touch module has better versatility.

[0007] In order to achieve the above-mentioned utility model object, the utility model proposes an electromagnetic touch module, including:

[0008] A flexible transparent touch film, used for detachably covering an external writing substrate, the flexible transparent touch film comprising a substrate and an electromagnetic sensor arranged on the surface of the substrate;

[0009] a controller, electrically connected to the flexible transparent touch film, comprising an electromagnetic sensor driver and a control chip; and,

[0010] The data transmission module is electrically connected to the control chip and is used for data transmission with an external device.

[0011] Furthermore, the electromagnetic sensor includes a plurality of first metal wires arranged in parallel and a plurality of second metal wires arranged in parallel, and the projections of the first metal wires and the second metal wires on the substrate are arranged crosswise.

[0012] The line width of the first metal line and the second metal line is 1.0-5.0 um.

[0013] Furthermore, the electromagnetic sensor includes a plurality of first receiving coils arranged in parallel and a plurality of second receiving coils arranged in parallel, the first receiving coil includes two of the first metal wires, and the second receiving coil includes two of the second metal wires.

[0014] Furthermore, the line width of the first metal line and the second metal line is 2.0-4.0 um.

[0015] Furthermore, the distance between two adjacent first metal wires ranges from 200 to 800 um;

[0016] The distance between two adjacent second metal wires ranges from 200 to 800 um.

[0017] Further, the data transmission module includes a data line for connecting to an external device; and / or,

[0018] The data transmission module includes a data interface for connecting to an external device via a data line;

[0019] The electromagnetic touch module includes a power supply for supplying power or is powered by a power supply of an external device.

[0020] Further, the data transmission module includes a wireless transmission module for wirelessly connecting to an external device;

[0021] The electromagnetic touch module also includes a power supply for supplying power.

[0022] Furthermore, a protective film and / or a hardening coating is provided on one side or both sides of the flexible transparent touch film.

[0023] Furthermore, the flexible transparent touch film further includes a capacitive sensor, the controller is electrically connected to the capacitive sensor, and the controller includes a capacitive sensor driver.

[0024] Furthermore, the electromagnetic touch module further comprises at least one of a key module, a camera, a microphone, a speaker and a display module electrically connected to the control chip;

[0025] The writing substrate is paper, an insulating hardboard or a display screen;

[0026] The external device is a mobile phone, a tablet computer, a laptop computer, a desktop computer or a cloud server.

[0027] Furthermore, the electromagnetic touch module further comprises a first electromagnetic shielding film located below the flexible transparent touch film;

[0028] The first electromagnetic shielding film is adhered to the flexible transparent touch film; or,

[0029] The first electromagnetic shielding film is disposed separately from the flexible transparent touch film. When in use, the first electromagnetic shielding film is placed under the writing substrate, or between the writing substrate and the flexible transparent touch film.

[0030] In a second aspect, the utility model provides a writing device, including an electromagnetic pen and the electromagnetic touch module as described above.

[0031] Further, the electromagnetic pen is an active electromagnetic pen; or,

[0032] The electromagnetic pen is a passive electromagnetic pen, and the flexible transparent touch film also includes a first electromagnetic power supply antenna for powering the electromagnetic pen. The first electromagnetic power supply antenna is electrically connected to the electromagnetic sensor driver and includes a power supply coil surrounding the outside of the electromagnetic sensor.

[0033] In a third aspect, the utility model provides an electronic device, including a display screen and the electromagnetic touch module as described above or the writing device as described above;

[0034] The flexible transparent touch film is attached to the outer surface of the display screen and is communicatively connected with the display screen through the data transmission module.

[0035] Furthermore, the electronic device includes a second electromagnetic shielding film and / or a second electromagnetic power supply antenna located below the display screen, the second electromagnetic power supply antenna is electrically connected to the control chip and includes a power supply coil surrounding the outside of the electromagnetic sensor.

[0036] Compared with the prior art, the utility model has the following beneficial effects: in the utility model, the electromagnetic touch module includes a detachable flexible transparent touch film covering an external writing substrate. Since the flexible transparent touch film can be torn off the writing substrate and covered on other writing substrates for writing, the flexible transparent touch film has better versatility, which is conducive to making some objects that originally do not have the electromagnetic pen writing function also have the electromagnetic pen writing function. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a module block diagram of an electromagnetic touch module in an embodiment of the present utility model.

[0038] Figure 2 It is a schematic diagram of a flexible transparent touch film in an embodiment of the utility model when it is covered on a writing substrate.

[0039] Figure 3It is a structural schematic diagram of a flexible transparent touch film in an embodiment of the utility model.

[0040] Figure 4 It is a layout diagram of the first receiving coil and the second receiving coil in one embodiment of the utility model.

[0041] Figure 5 This is a schematic diagram of the positions of the first metal wire and the second metal wire in an embodiment of the utility model. In the figure, the first metal wire and the second metal wire are perpendicular to each other.

[0042] Figure 6 This is a schematic diagram of the positions of the first metal wire and the second metal wire in an embodiment of the utility model. In the figure, the first metal wire and the second metal wire cross to form a diamond shape.

[0043] Figure 7 This is a module block diagram of an electromagnetic touch module in an embodiment of the present utility model.

[0044] Figure 8 This is a schematic diagram of an electromagnetic touch module in an embodiment of the present utility model, and a data line is shown in the figure.

[0045] Fig. 9 It is a schematic diagram of an electromagnetic touch module in an embodiment of the utility model, and shows a data interface.

[0046] Fig.10 It is a schematic diagram of a flexible transparent touch film of an embodiment of the utility model when a protective film is provided.

[0047] Fig.11 It is a schematic diagram of a flexible transparent touch film of an embodiment of the present utility model provided with a protective film and a hardened coating.

[0048] Fig.12 This is a module block diagram of an electromagnetic touch module in an embodiment of the present utility model.

[0049] Fig.13 It is a structural schematic diagram of a flexible transparent touch film in an embodiment of the utility model.

[0050] Fig.14 The utility model discloses a module frame of an electromagnetic touch module in one embodiment of the utility model.

[0051] Fig.15 It is a schematic diagram of a flexible transparent touch film in an embodiment of the utility model provided with a first electromagnetic shielding film.

[0052] Fig.16 It is a schematic diagram of a first electromagnetic shielding film of an embodiment of the utility model when it is placed under a writing substrate.

[0053] Fig.17 It is a structural schematic diagram of a writing device in one embodiment of the utility model.

[0054] Fig.18 It is a schematic diagram of the position of the first electromagnetic power supply antenna in an embodiment of the utility model.

[0055] Fig.19 It is a structural schematic diagram of an electronic device in an embodiment of the utility model. DETAILED DESCRIPTION

[0056] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some structures related to the present application are shown in the accompanying drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0057] The terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0058] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive of other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0059] like Figure 1 As shown, the utility model proposes an electromagnetic touch module, which includes a flexible transparent touch film 10 , a controller 11 and a data transmission module 12 .

[0060] refer to Figure 2The flexible transparent touch film 10 is used to cover the external writing substrate 2 in a detachable manner. Since the flexible transparent touch film 10 is transparent and flexible, when it covers the writing substrate 2, the writing substrate 2 can still be seen through the flexible transparent touch film 10, and the text, pattern or other content on the writing substrate 2 can be displayed. The writing substrate 2 can be an object of paper nature such as a workbook, a textbook or a book, or an insulating hard board, or an object such as a display screen. When in use, operations such as answering questions, tracing or drawing can be performed according to the content displayed on the writing substrate 2.

[0061] like Figure 3 As shown, the flexible transparent touch film 10 includes a substrate 100 and an electromagnetic sensor 101 disposed on the surface of the substrate 100 .

[0062] The controller 11 is electrically connected to the flexible transparent touch film 10, and includes an electromagnetic sensor driver 110 and a control chip 111. The electromagnetic sensor driver 110 can process the electrical signal of the controller 11 and transmit it to the electromagnetic sensor 101, so that the electromagnetic sensor 101 generates a magnetic field. The electromagnetic sensor 101 can sense the magnetic field changes brought by the electromagnetic pen 4 and generate an induction signal. The induction signal is collected and processed by the electromagnetic sensor driver 110 and then transmitted to the control chip 111. The control chip 111 can calculate the writing position and trajectory of the electromagnetic pen 4 based on the received induction signal of the flexible transparent touch film 10.

[0063] The data transmission module 12 is electrically connected to the control chip 111 and is used to transmit data with an external device. The external device may be, for example, a mobile phone, a tablet computer, a notebook, a desktop computer, a display or a cloud server, etc. Through the communication connection with the external device, the information written by the electromagnetic pen 4 can be transmitted to the external device, and then displayed or stored on the external device. Of course, the data transmission module 12 can also transmit the information of the external device to the electromagnetic touch module.

[0064] Since the flexible transparent touch film 10 is relatively independent, it can be covered on the writing substrate 2 or separated from the writing substrate 2, and then applied to other writing substrates 2 (for example, it can be covered on a workbook to do homework, or covered on a drawing book to draw, or covered on a display screen to write). Therefore, it can be used on various different objects, with a wider range of uses, which improves the versatility of the electromagnetic pen 4 for touch or writing. In addition, the data transmission module 12 of the flexible transparent touch film 10 can communicate with an external device. When the external device has a display screen, the writing content of the electromagnetic pen 4 on the flexible transparent touch film 10 can be displayed in real time on the display screen to realize the original handwriting writing. Since the electromagnetic touch module does not need to have its own display screen and other devices, its cost is lower.

[0065] It should be noted that different base images can be placed under the relatively independent flexible transparent touch film 10, thereby realizing the function of tracing and copying, while traditional electronic devices such as writing boards cannot realize the tracing and copying function on paper. In addition, since the flexible transparent touch film 10 is flexible, it can be easily lifted from the writing substrate 2.

[0066] In some embodiments, the electromagnetic sensor 101 is a metal mesh sensor, such as Figure 4 As shown, it includes a plurality of first receiving coils 103 arranged in parallel along a first arrangement direction X and a plurality of second receiving coils 104 arranged in parallel along a second arrangement direction Y. The first receiving coil 103 includes two first metal wires 1010 arranged in parallel along the first arrangement direction X, and the second receiving coil 104 includes two second metal wires 1011 arranged in parallel along the second arrangement direction Y. Figure 5 and Figure 6 That is, the electromagnetic sensor 101 includes a plurality of first metal wires 1010 arranged in parallel and a plurality of second metal wires 1011 arranged in parallel, and the projections of the first metal wires 1010 and the second metal wires 1011 on the substrate 100 (for example, the upper surface 100a or the lower surface 100b thereof) are arranged crosswise, Figure 5 and Figure 6 In the figure, the first metal wire 1010 is indicated by a solid line, and the second metal wire 1011 is indicated by a dotted line. The first receiving coil 103 and the second receiving coil 104 can sense the change of the magnetic field, and the coordinates of the electromagnetic pen 4 in the X and Y directions can be obtained after calculation by the controller 11. In addition, the parameters such as the inclination angle of the electromagnetic pen 4 can also be obtained in combination with the change of the magnetic field.

[0067] Optionally, two adjacent first receiving coils 103 are arranged at intervals and do not cross each other, and two adjacent second receiving coils 104 are arranged at intervals and do not cross each other.

[0068] The first metal wire 1010 and the second metal wire 1011 may be disposed on the same surface of the substrate 100 (e.g., the upper surface 100a or the lower surface 100b of the substrate 100), or may be disposed on two surfaces of the substrate 100, that is, disposed on the upper surface 100a or the lower surface 100b. When disposed on the same surface, the intersection of the first metal wire 1010 and the second metal wire 1011 needs to be insulated.

[0069] Optionally, the line width of the first metal wire 1010 and the second metal wire 1011 is 1.0 to 5.0 μm, which is invisible to the naked eye and can effectively improve the light transmittance of the flexible transparent touch film. When it is necessary to observe the content on the writing substrate 2 through the flexible transparent touch film 10, the better the light transmittance of the flexible transparent touch film 10, the better the observation effect and the better the user experience. Further optionally, the line width of the first metal wire 1010 and the second metal wire 1011 is 2.0 to 4.0 um. The first metal wire 1010 and the second metal wire 1011 are set to a line width of 2.0 to 4.0 um. The light transmittance of the flexible transparent touch film formed after wiring on the substrate 100 can reach more than 88%.

[0070] like Figure 5 and Figure 6 As shown, the distance W1 between two adjacent first metal wires 1010 ranges from 200 to 800 um; the distance W2 between two adjacent second metal wires 1011 ranges from 200 to 800 um. On the one hand, the reliability and sensitivity of the electromagnetic induction of the flexible transparent touch film can be improved, and on the other hand, the light transmittance can be guaranteed. Optionally, the angle α between the first metal wire 1010 and the second metal wire 1011 is 45 to 135°, for example, 45°, 90°, 135°, etc.

[0071] The substrate 100 is made of a transparent material, and the substrate 100 is one of PET film, PC film, PI film, COP film, COC film, PEN film, TAC film, PC / PMMA composite film, or soda-lime glass or aluminosilicate glass. Preferably, the thickness D of the substrate 100 is 10 to 100 um, so that the substrate 100 has good light transmittance. The material of the first metal wire 1010 and the second metal wire 1011 is, for example, copper, silver or gold. Existing processes can be used, such as coating, exposure, development, copperization, blackening, PMMA and other processes on the surface of the substrate 100 to obtain metal wires, and the reflectivity can be reduced by blackening.

[0072] The data transmission module 12 may be connected to the external physical device via a wired connection, or via a wireless connection, or may have the function of being connected via both a wired connection and a wireless connection.

[0073] In some embodiments, Figure 7 and Figure 8As shown, the data transmission module 12 includes a data line 120, which is connected to the data interface of the external device through the data line 120. In this embodiment, the connection end of the data line 120 and the electromagnetic touch module is fixed and inseparable, and only the other end can be connected to the external device. The external end of the data line 120 is provided with a data connector, such as a USB plug or a type-c plug, etc., and the external device can be, for example, a mobile phone, a tablet computer, a laptop computer or a desktop computer, etc., which has a corresponding data interface.

[0074] In some embodiments, Figure 7 and Fig. 9 As shown, the data transmission module 12 includes a data interface 121 for connecting to an external device via a data line. The data interface 121 may be, for example, a USB interface or a type-c interface. The external device may be, for example, a mobile phone, a tablet computer, a laptop computer, or a desktop computer. By connecting the data interface and the external device via a data line, data interaction may be achieved. The data line and the data transmission module 12 may be pluggable, which may reduce the volume of the electromagnetic touch film group and facilitate storage.

[0075] In some embodiments, Figure 7 As shown, the data transmission module 12 includes a wireless transmission module 122 for wireless connection with an external device, and the wireless transmission module 122 may be, for example, a Bluetooth module, a 4G module, or a wifi module. The data is communicated and connected with the external device by wireless transmission, and then data is exchanged. The external device may be, for example, a mobile phone, a tablet computer, a laptop computer, a desktop computer, or a cloud server. The data of the electromagnetic touch module may be directly transmitted to the cloud server, or may be uploaded to the cloud server through a mobile phone, a computer, or other devices.

[0076] It is understandable that the electromagnetic touch module can be provided with one or more of the data line 120 , the data interface 121 and the wireless transmission module 122 , and thus different means can be selectively used for data transmission.

[0077] like Figure 8 and Fig. 9 As shown, the electromagnetic touch module may include a housing 16, a controller 11 is disposed in the housing 16, a data transmission module 12 is connected to the housing 16, for example, its data line 120 and data interface 121 are both disposed on the housing 16, and a wireless transmission module 122 is disposed in the housing 16. The housing 16 may be connected to the flexible transparent touch film 10, for example, fixed to one side of the flexible transparent touch film 10, or may be separately disposed from the flexible transparent touch film 10 and connected via a cable.

[0078] The electromagnetic touch module can be powered by an external device or by its own power supply, or can have both the functions of being powered by an external device and being powered by its own power supply.

[0079] In some embodiments, Figure 7 As shown, the electromagnetic touch module includes a power supply 123 for power supply, and the power supply can be, for example, a battery with energy storage function, and the power is supplied by the power of the battery. Optionally, the battery is a rechargeable battery. The power supply can also be a plug, and the plug can be connected to the mains to power the electromagnetic touch module.

[0080] In some embodiments, the electromagnetic touch module is powered by an external device. For example, when it is connected to an external device such as a mobile phone, a tablet or a computer via a data line 120 , it can be powered by the data line 120 .

[0081] It is understandable that when the electromagnetic touch module is applied to scenes such as paper or an insulating hard board, since paper and insulating hard boards do not have the function of powering, it is preferred that the electromagnetic touch module has its own power supply 123 so that it can work normally without the help of external equipment. Of course, even if the electromagnetic touch module is applied to scenes such as paper or an insulating hard board, the electromagnetic touch module does not have to have its own power supply, and it can still be connected to an external device (such as a mobile phone, a computer, a power bank, etc.) to use the power of the external device.

[0082] In some embodiments, Fig.10 and Fig.11 As shown, the flexible transparent touch film 10 further includes a protective film 124 and / or a hardened coating 125. The protective film 124 and the hardened coating 125 can play a protective role to prevent water or other liquids from invading the flexible transparent touch film 10 and make the flexible transparent touch film 10 more resistant to bending and wear.

[0083] A protective film 124 or a hardened coating 125 may be provided on the surface of one side or both sides of the flexible transparent touch film 10. Optionally, at least the surface of the flexible transparent touch film 10 facing the electromagnetic pen 4 is provided with a protective film 124 or a hardened coating 125 to reduce the wear of the flexible transparent touch film 10 when the electromagnetic pen 4 is writing. Further optionally, protective films 124 or hardened coatings 125 are provided on both side surfaces of the flexible transparent touch film 10 to further improve its overall performance. It is understandable that, on the surface of one side of the flexible transparent touch film 10, it is not limited to only providing the protective film 124 or only providing the hardened coating 125, and the protective film 124 and the hardened coating 125 may also be provided at the same time, and the stacking order of the protective film 124 and the hardened coating 125 is not limited. Fig.11 The figure shows a situation where the protective film 124 and the hardening coating 125 are disposed on both sides of the flexible transparent touch film 10 .

[0084] The material of the protective film 124 may be, for example, a PET film, a PE film, a PI film, etc.; the material of the hardening coating 125 may be, for example, a modified acrylic resin system coating liquid, a polyurethane system coating liquid, etc.

[0085] In some embodiments, Fig.12 and Fig.13 As shown, the flexible transparent touch film 10 also includes a capacitive sensor 13, the controller 11 is electrically connected to the capacitive sensor 13, and the controller 11 includes a capacitive sensor driver 14 electrically connected to the control chip 111 to control the operation of the capacitive sensor 13. The capacitive sensor 13 can sense the capacitance change on the surface of the flexible transparent touch film 10. When a finger touches the flexible transparent touch film 10, a capacitive signal can be generated, thereby realizing touch sensing of the finger. In this way, the flexible transparent touch film 10 has the functions of electromagnetic induction and capacitive induction at the same time.

[0086] The capacitive sensor 13 may be an independent layer connected to the surface of the flexible transparent touch film 10, for example, it includes a substrate and a metal grid layer or an ITO grid layer disposed on the substrate for sensing a capacitive signal, and the entirety is bonded to the flexible transparent touch film 10. The capacitive sensor 13 may also be integrated into the flexible transparent touch film 10, in which case the flexible transparent touch film 10 contains a magnetic-capacitive integrated film. For example, the capacitive sensor 13 includes a grid layer for sensing a capacitive signal, and the grid layer is also disposed on the surface of the substrate 100.

[0087] Optional, such as Figure 8 , Fig. 9 and Fig.14 As shown, the electromagnetic touch module further includes at least one of a key module 30 , a camera 31 , a microphone 32 , a speaker 33 and a display module 34 electrically connected to the control chip 111 .

[0088] Exemplarily, the electromagnetic touch module includes a button module 30 electrically connected to the control chip 111, and the button module 30 includes but is not limited to mechanical buttons, capacitive sensing buttons or pressure sensing buttons, etc. The capacitive touch module can be operated through the buttons, such as turning on and off the machine or adjusting the volume, etc.

[0089] Exemplarily, the electromagnetic touch module includes a camera 31 electrically connected to the control chip 111 , and the camera 31 can be used to perform functions such as taking pictures, recording videos, monitoring, or face recognition.

[0090] Exemplarily, the electromagnetic touch module includes a microphone 32 electrically connected to the control chip 111 , and functions such as recording or voice interaction can be implemented through the microphone 32 .

[0091] Exemplarily, the electromagnetic touch module includes a speaker 33 electrically connected to the control chip 111 , and sounds can be played through the speaker 33 , such as prompting power on and off, reading content, playing answer scores, etc.

[0092] Exemplarily, the electromagnetic touch module includes a display module 34 electrically connected to the control chip 111 to display relevant information.

[0093] Exemplarily, the button module 30 , camera 31 , microphone 32 , speaker 33 , display module 34 and the like mentioned above may all be installed on the housing 16 .

[0094] Optionally, the electromagnetic touch module further includes a first electromagnetic shielding film 15 located below the flexible transparent touch film 10 . The first electromagnetic shielding film 15 can prevent or reduce external electromagnetic interference, so that the flexible transparent touch film 10 can sense the electromagnetic field of the electromagnetic pen 4 more sensitively and accurately.

[0095] In some embodiments, the first electromagnetic shielding film 15 is fixedly connected to the flexible transparent touch film 10, and the two are fixed to each other and cannot be separated. For example, the first electromagnetic shielding film 15 can be directly attached to the bottom of the flexible transparent touch film 10 (refer to Fig.15 ), or the first electromagnetic shielding film 15 is connected below other layers at the bottom of the flexible transparent touch film 10. Preferably, the first electromagnetic shielding film 15 has good light transmittance to facilitate display of the content on the writing substrate 2.

[0096] In some embodiments, the first electromagnetic shielding film 15 and the flexible transparent touch film 10 are separately arranged. When in use, the first electromagnetic shielding film 15 can be placed under the writing substrate 2 or between the writing substrate 2 and the flexible transparent touch film 10 as appropriate. Fig.16 When the writing substrate 2 is a thinner paper or an insulating hard board (such as a plastic board, a glass board, or a composite board), it can be placed under the writing substrate 2. When the writing substrate 2 is thicker or there are electromagnetic devices inside the display, it can be placed above the writing substrate 2 to reduce the interference of the electromagnetic devices inside the display and ensure the shielding effect.

[0097] As mentioned above, the electromagnetic touch module has various usage scenarios. The following introduces it in several usage scenarios to further demonstrate its beneficial effects.

[0098] Use scenario 1:

[0099] In this scenario, the writing substrate 2 can be a workbook, textbook, test paper, etc. The flexible transparent touch film 10 is covered on the writing substrate 2. The electromagnetic pen 4 is used to write the answer according to the question on the writing substrate 2. The answer can be transmitted to an external device in the form of original handwriting, such as transmitted to a cloud server (can be directly transmitted to the cloud server or first transmitted to a mobile phone / computer, etc., and then transmitted to the cloud server). The cloud server then sends the answer to the teacher's / parent's computer or other device, which can then be corrected. Since it is in the form of original handwriting, it can prevent the behavior of homework ghostwriting.

[0100] Of course, the external device can be installed with AI software, which has a question bank and answers corresponding to the writing substrate 2, so as to realize AI automatic correction of homework, which can reduce the reading and correction work of teachers / parents. Furthermore, AI components can also be directly installed inside the electromagnetic touch module, and homework can be automatically corrected through the internal AI software. In this case, there is no need to transmit data externally.

[0101] The result of the marking can be communicated to the students by voice through a loudspeaker, or by visual means through the display module 34 .

[0102] The above scenario can realize the digitization of the traditional paper handwriting process.

[0103] Use scenario 2:

[0104] In this scenario, the writing substrate 2 is an insulating hard board, such as a plastic board, and the electromagnetic touch module is connected to an external device with a display screen through its data transmission module 12. The external device can be, for example, a mobile phone, a tablet or a computer.

[0105] When writing on the flexible transparent touch film 10, the written content can be displayed on the display screen of the external device in real time, and the written content can be stored and recorded by the external device.

[0106] The cursor of an external device can also be controlled by moving and clicking the electromagnetic pen 4 on the flexible transparent touch film 10, so that the electromagnetic touch module can cooperate with the electromagnetic pen 4 to play a role similar to a mouse or a touchpad or magic control pad of a notebook.

[0107] Use scenario three:

[0108] In this scenario, the writing substrate 2 is an external device with a display screen, and the display screen does not have a touch function. The external device is, for example, a notebook or a desktop computer.

[0109] When in use, the electromagnetic touch module is connected to an external device with a display screen through its data transmission module 12, and the flexible transparent touch film 10 is covered on the outside of the display screen. When the electromagnetic pen 4 touches the flexible transparent touch film 10, the sensing signal of the electromagnetic sensor 101 is converted into an operation signal for the corresponding area of ​​the display screen, such as clicking or sliding a certain area, so that the display screen has a touch function.

[0110] It is understandable that when the electromagnetic touch module also has the capacitive sensor 13, touch control can be achieved through fingers.

[0111] In the above scenario, the electromagnetic touch module is used to realize the touch operation of the display screen without touch function.

[0112] The utility model also proposes a writing device, such as Fig.17 As shown, it includes an electromagnetic pen 4 and the electromagnetic touch module as described above.

[0113] The electromagnetic pen 4 can be an active electromagnetic pen or a passive electromagnetic pen. The flexible transparent touch film 10 also includes a first electromagnetic power supply antenna 102 for powering the passive electromagnetic pen. The first electromagnetic power supply antenna 102 is preferably located on the side of the flexible transparent touch film 10 facing the writing substrate 2. When the electromagnetic pen 4 is a passive electromagnetic pen, the flexible transparent touch film 10 can power the passive electromagnetic pen through the first electromagnetic power supply antenna 102.

[0114] In some embodiments, the first electromagnetic power supply antenna 102 includes a power supply coil or multiple power supply coils arranged concentrically. Fig.18 As shown, the coil is located at the edge of the flexible transparent touch film 10 and surrounds the outside of the electromagnetic sensor 101. When the first electromagnetic power supply antenna 102 is working, it emits a magnetic field, and the electromagnetic pen 4 is electromagnetically induced by the magnetic field to generate an induced magnetic field, which can be sensed by the electromagnetic sensor 101.

[0115] It is understandable that when the flexible transparent touch film 10 is specifically used in conjunction with an active electromagnetic pen, the first electromagnetic power supply antenna 102 may not be provided.

[0116] The first electromagnetic power supply antenna 102 is electrically connected to the electromagnetic sensor driver 110 . The control signal of the control chip 111 is processed by the electromagnetic sensor driver 110 and then output to the first electromagnetic power supply antenna 102 , so that the first electromagnetic power supply antenna 102 generates a magnetic field under the control of the control chip 111 .

[0117] It is understandable that when the electromagnetic pen 4 is specifically used in a device provided with an electromagnetic power supply antenna, the flexible transparent touch film 10 may not be provided with an electromagnetic power supply antenna, and the electromagnetic power supply antenna in the device may be used to power the electromagnetic pen 4.

[0118] It is understandable that no matter an active electromagnetic pen or a passive electromagnetic pen is used, the first electromagnetic power supply antenna 102 can be provided in the flexible transparent touch film 10 . When the active electromagnetic pen is used, the first electromagnetic power supply antenna 102 does not need to work.

[0119] The utility model also provides an electronic device, such as Fig.19 As shown, it includes a display screen 5 and the electromagnetic touch module or writing device as described above.

[0120] The display screen 5 may be, for example, a liquid crystal screen (eg, a cholesterol liquid crystal screen) or an ink screen.

[0121] The flexible transparent touch film 10 is attached to the outer surface of the display screen 5 and is connected to the display screen 5 through the data transmission module 12. When the electromagnetic pen 4 is used to write on the surface of the flexible transparent touch film 10, the writing traces can appear on the display screen 5 at the position corresponding to the pen tip of the electromagnetic pen 4 in real time.

[0122] The electronic device further includes a second electromagnetic shielding film 50 and / or a second electromagnetic power supply antenna 51 located below the display screen 5. The second electromagnetic shielding film 50 is used to shield the interference of the electromagnetic components below the display screen 5 on the magnetic field signal to improve the accuracy of signal detection. The second electromagnetic power supply antenna 51 is used to power the passive electromagnetic pen 4. The structure and position of the second electromagnetic power supply antenna 51 can refer to the first electromagnetic power supply antenna 102, which also includes a power supply coil surrounding the outside of the electromagnetic sensor 101.

[0123] It is understandable that when the electronic device has the second electromagnetic shielding film 50, the electromagnetic touch module may not have the first electromagnetic shielding film 15. When the electronic device has the second electromagnetic power supply antenna 51, the electromagnetic touch module may not have the first electromagnetic power supply antenna 102, but it may also have it. When it has it, the first electromagnetic power supply antenna 102 or the second electromagnetic power supply antenna 51 may be selectively used for power supply.

[0124] The above are only specific implementations of the present invention, and any improvements made based on the concept of the present invention are considered to be within the protection scope of the present invention.

Claims

1. An electromagnetic touch module, characterized in that: include: A flexible transparent touch film (10) used for detachably covering an external writing substrate (2), the flexible transparent touch film (10) comprising a substrate (100) and an electromagnetic sensor (101) arranged on the surface of the substrate (100); a controller (11), electrically connected to the flexible transparent touch film (10), comprising an electromagnetic sensor driver (110) and a control chip (111); and, A data transmission module (12) is electrically connected to the control chip (111) and is used for data transmission with an external device.

2. The electromagnetic touch module according to claim 1, wherein: The electromagnetic sensor (101) comprises a plurality of first metal wires (1010) arranged in parallel and a plurality of second metal wires (1011) arranged in parallel, wherein the projections of the first metal wires (1010) and the second metal wires (1011) on the substrate (100) are arranged to cross each other. The line width of the first metal line (1010) and the second metal line (1011) is 1.0-5.0 um.

3. The electromagnetic touch module according to claim 2, wherein: The electromagnetic sensor (101) comprises a plurality of first receiving coils (103) arranged in parallel and a plurality of second receiving coils (104) arranged in parallel, wherein the first receiving coil (103) comprises two first metal wires (1010), and the second receiving coil (104) comprises two second metal wires (1011).

4. The electromagnetic touch module according to claim 2, wherein: The line width of the first metal line (1010) and the second metal line (1011) is 2.0-4.0 um.

5. The electromagnetic touch module according to claim 4, characterized in that: The distance between two adjacent first metal wires (1010) ranges from 200 to 800 um; The distance between two adjacent second metal wires (1011) ranges from 200 to 800 um.

6. The electromagnetic touch module according to claim 1, wherein: The data transmission module (12) comprises a data line (120) for connecting to an external device; and / or, The data transmission module (12) comprises a data interface (121) for connecting to an external device via a data line; The electromagnetic touch module comprises a power supply (123) for supplying power or is powered by a power supply of an external device.

7. The electromagnetic touch module according to claim 1, wherein: The data transmission module (12) comprises a wireless transmission module (122) for wirelessly connecting to an external device; The electromagnetic touch module also includes a power supply (123) for supplying power.

8. The electromagnetic touch module according to any one of claims 1 to 7, characterized in that: A protective film (124) and / or a hardening coating (125) is provided on one side or both sides of the flexible transparent touch film (10).

9. The electromagnetic touch module according to any one of claims 1 to 7, characterized in that: The flexible transparent touch film (10) further comprises a capacitive sensor (13), the controller (11) is electrically connected to the capacitive sensor (13), and the controller (11) comprises a capacitive sensor driver (14).

10. The electromagnetic touch module according to any one of claims 1 to 7, characterized in that: The electromagnetic touch module further comprises at least one of a key module (30), a camera (31), a microphone (32), a speaker (33) and a display module (34) electrically connected to the control chip (111); The writing substrate (2) is paper, an insulating hard board or a display screen; The external device is a mobile phone, a tablet computer, a laptop computer, a desktop computer or a cloud server.

11. The electromagnetic touch module according to any one of claims 1 to 7, characterized in that: The electromagnetic touch module further comprises a first electromagnetic shielding film (15) located below the flexible transparent touch film (10); The first electromagnetic shielding film (15) is adhered to the flexible transparent touch film (10); or, The first electromagnetic shielding film (15) is arranged separately from the flexible transparent touch film (10). When in use, the first electromagnetic shielding film (15) is placed below the writing substrate (2), or between the writing substrate (2) and the flexible transparent touch film (10).

12. A writing device, characterized in that: It comprises an electromagnetic pen (4) and an electromagnetic touch module (1) as claimed in any one of claims 1 to 11.

13. The writing device according to claim 12, characterized in that The electromagnetic pen (4) is an active electromagnetic pen; or, The electromagnetic pen (4) is a passive electromagnetic pen, and the flexible transparent touch film (10) further comprises a first electromagnetic power supply antenna (102) for supplying power to the electromagnetic pen (4); the first electromagnetic power supply antenna (102) is electrically connected to the electromagnetic sensor driver (110) and comprises a power supply coil surrounding the outside of the electromagnetic sensor (101).

14. An electronic device, characterized in that: It comprises a display screen (5) and an electromagnetic touch module (1) as claimed in any one of claims 1 to 11 or a writing device as claimed in claim 12 or 13; The flexible transparent touch film (10) is attached to the outer surface of the display screen (5) and is communicatively connected to the display screen (5) via the data transmission module (12).

15. The electronic device according to claim 14, characterized in that: The electronic device comprises a second electromagnetic shielding film (50) and / or a second electromagnetic power supply antenna (51) located below the display screen (5), and the second electromagnetic power supply antenna (51) comprises a power supply coil surrounding the outside of the electromagnetic sensor (101).

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