Touch structure for reducing electromagnetic interference

Abstract

A touch structure for reducing electromagnetic interference includes a touch module and an anti-interference module. The touch module has at least one electrode layer, and the anti-interference module forms a stacked structure with the touch module. The anti-interference module has a dielectric layer stacked on the touch module and a conductive thin film layer stacked on the dielectric layer. The conductive thin film layer serves as a touch surface of the touch structure but is not used to generate a touch signal. There is a potential difference between the conductive thin film layer and the at least one electrode layer. When the conductive thin film layer is touched, the distance between it and the at least one electrode layer changes, and the capacitance between them also changes.

Description

Technical Field

[0001] This invention provides a touch structure, and more particularly a touch structure that reduces electromagnetic interference. Background Technology

[0002] With the development of technology, the application scope of current touch structures has become increasingly wide, and touch structures can be found in industrial automation, medical equipment, military equipment, automotive electronics, aerospace, public transportation and outdoor equipment.

[0003] However, the environments in which the aforementioned touch structures are used include those with high electromagnetic interference (EMI). The operation of the touch structure may be affected by electromagnetic interference (EMI) from other electronic devices. The electromagnetic radiation generated by these devices can cause instability in the touch structure's operation, decreased sensitivity, and even display abnormalities.

[0004] Furthermore, to ensure the electromagnetic compatibility of its electronic, electrical, and mechanical equipment and systems, the U.S. Department of Defense has developed a set of military standards, MIL-STD-461. This standard includes a comprehensive set of testing procedures to assess the electromagnetic radiation and susceptibility of equipment to electromagnetic interference, aiming to prevent and control unwanted electromagnetic interference (EMI) generated or suffered by military equipment, and to ensure the smooth and safe operation of military operations.

[0005] Therefore, ensuring the anti-interference capability of current touch structures is a necessary issue. Utility Model Content

[0006] The main purpose of this invention is to solve the problem that existing touch structures cannot ensure their anti-interference capabilities.

[0007] To achieve the above objectives, this utility model provides a touch structure for reducing electromagnetic interference, comprising a touch module and an anti-interference module. The touch module has at least one electrode layer, and the anti-interference module forms a stacked structure with the touch module. The anti-interference module has a dielectric layer stacked on the touch module and a conductive thin film layer stacked on the dielectric layer. The conductive thin film layer serves as a touch surface of the touch structure but is not used to generate a touch signal. There is a potential difference between the conductive thin film layer and the at least one electrode layer. When the conductive thin film layer is touched, the distance between it and the at least one electrode layer changes, and the capacitance between them also changes.

[0008] In one embodiment, the dielectric layer comprises an insulating medium.

[0009] In one embodiment, the dielectric layer includes a plurality of spacer dots distributed within the insulating medium.

[0010] In one embodiment, the insulating medium is a gas.

[0011] In one embodiment, the insulating medium is an insulating liquid.

[0012] In one embodiment, the anti-interference module includes a support layer located on one side of the dielectric layer facing the at least one electrode layer.

[0013] In one embodiment, the anti-interference module has at least one adhesive that bonds the support layer to the conductive thin film layer.

[0014] In one embodiment, the electrode layer of the touch module is multiple.

[0015] In one embodiment, the touch module has at least one adhesive layer that bonds the plurality of electrode layers.

[0016] In one embodiment, the touch module has at least one auxiliary support layer, which is disposed corresponding to one of the plurality of electrode layers.

[0017] In one embodiment, the touch module has at least one auxiliary anti-interference layer, which corresponds to one of the plurality of electrode layers.

[0018] Compared with conventional technology, the present invention, through the aforementioned implementation of the technology, has the following characteristics: The touch structure of the present invention includes an anti-interference module, which comprises a dielectric layer and a conductive thin film layer. The dielectric layer is stacked on the touch module, and the conductive thin film layer is supported by the dielectric layer and positioned on the touch module, serving as the touch surface of the touch structure. A potential difference exists between the conductive thin film layer and the at least one electrode layer to reduce electromagnetic interference to the touch module. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram illustrating the first embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the second embodiment of the present utility model;

[0022] Figure 4 This is a structural schematic diagram of the third embodiment of the present utility model;

[0023] Figure 5 This is a structural schematic diagram of the fourth embodiment of the present utility model;

[0024] Figure 6 This is a structural schematic diagram of the fifth embodiment of the present utility model;

[0025] Figure 7This is a schematic diagram of the structure of the sixth embodiment of the present utility model;

[0026] Figure 8 This is a structural schematic diagram of the seventh embodiment of the present utility model;

[0027] Figure 9 This is a structural schematic diagram of the eighth embodiment of the present utility model.

[0028] [Symbol Explanation]

[0029] 20: Touchscreen Structure

[0030] 201: Touch surface

[0031] 21: Touch module

[0032] 211: Electrode layer

[0033] 212: Auxiliary support layer

[0034] 213: Auxiliary Disturbance Suppression Layer

[0035] 214: Adhesive layer

[0036] 23: Anti-interference module

[0037] 231: Dielectric layer

[0038] 232: Conductive thin film layer

[0039] 233: Insulating medium

[0040] 234: Spacer

[0041] 235: Support layer

[0042] 236: Adhesive

[0043] 25: Optical adhesive layer

[0044] 30: Touchscreen computing chip

[0045] 40: Conductor Detailed Implementation

[0046] The use of the quantifiers “a” or “an” for the elements and components described throughout this document is for convenience and to provide the general meaning of the scope of this utility model. In this utility model, it should be interpreted as including one or at least one, and a single concept also includes multiple cases, unless the context clearly indicates otherwise or limits the interpretation of the quantifiers.

[0047] The descriptions of directions such as "up" and "down" in this article are based on the attached diagram for ease of understanding only, and are not limited to these directions. They can be adjusted according to the actual situation.

[0048] Please see Figures 1 to 9 This utility model provides a touch structure 20, which includes a touch module 21 and an anti-interference module 23. The touch module 21 has at least one electrode layer 211, which uses capacitive sensing technology to detect touch. The principle of capacitive touch is well known to the public and will not be elaborated here.

[0049] The anti-interference module 23 and the touch module 21 form a stacked structure. The anti-interference module 23 is stacked on top of the touch module 21 and includes a dielectric layer 231 and a conductive thin film layer 232. The dielectric layer 231 is stacked on the touch module 21 and is insulating, not conductive with the touch module 21. The conductive thin film layer 232 is stacked on the dielectric layer 231 and serves as a touch surface 201 of the touch structure 20. The touch surface 201 provides a conductor 40 (e.g., a finger) for touch. However, the conductive thin film layer 232 is not used to generate a touch signal, but rather to reduce electromagnetic interference to the touch module 21. Specifically, after the conductive thin film layer 232 contacts the conductor 40, the conductive thin film layer 232 will not generate a signal indicating the touch position of the conductor 40, but it is not limited to generating a signal to calculate the touch position of the conductor 40. The conductive thin film layer 232 is isolated from the touch module 21 by the dielectric layer 231, and there is a potential difference between the conductive thin film layer 232 and the at least one electrode layer 211. The aforementioned potential difference is implemented by setting one of the conductive thin film layer 232 and the at least one electrode layer 211 to a high potential and setting the other of the conductive thin film layer 232 and the at least one electrode layer 211 to a low potential. The specific scheme includes: (i) the conductive thin film layer 232 is grounded and the at least one electrode layer 211 is energized; (ii) the conductive thin film layer 232 is energized and the at least one electrode layer 211 is grounded.

[0050] The implementation of the touch structure 20 will now be explained. Please refer to [link / reference]. Figure 2 When implemented, the touch structure 20 is paired with a touch processing chip 30. The touch structure 20 is initially configured such that it is powered on but not touched. The at least one electrode layer 211 and the conductive thin film layer 232 are both connected to the touch processing chip 30. When the at least one electrode layer 211 is powered on, the touch processing chip 30 obtains a first capacitance value from the at least one electrode layer 211. When the conductive thin film layer 232 is powered on, the touch processing chip 30 obtains a second capacitance value from the space between the conductive thin film layer 232 and the at least one electrode layer 211.

[0051] When the conductor 40 intends to touch the touch structure 20, the sensing distance of the conductor 40 when touching the touch structure 20 is such that an electric field is formed between the conductor 40 and the touch structure 20, without restricting the conductor 40 from actually making contact with the touch structure 20. After the touch structure 20 is operated by the conductor 40, the conductive thin film layer 232 changes its distance from the at least one electrode layer 211 due to the force exerted by the conductor 40. The touch computing chip 30 obtains a third capacitance value based on the conductor 40 and the conductive thin film layer 232. When the third capacitance value is greater than the sum of the first capacitance value and the second capacitance value, the touch computing chip 30 outputs the touch signal, and the touch signal describes the touch coordinates of the conductor 40.

[0052] As described above, the anti-interference module 23 of this invention can be stacked with the existing touch module 21 to form a composite structure. This invention, through the anti-interference module 23, improves the conditions (i.e., capacitance) during touch signal generation, filtering out unwanted electromagnetic waves to reduce electromagnetic interference to the touch module 21. Furthermore, the touch structure 20 implemented with this invention does not require an additional surface protection layer as in existing touch structures. The touch structure 20 of this invention uses the anti-interference module 23 to protect the touch module 21. Simultaneously, the touch structure 20 of this invention complies with the electric field radiation test in the military standard MIL-STD-461G established by the U.S. Department of Defense. Although the touch structure 20 uses capacitive sensing technology to detect touch, it also possesses the characteristics of resistive touch structures 20, such as a soft surface and water resistance.

[0053] The following describes the various implementations of this case. It should be understood that these embodiments are all based on the aforementioned technical means and belong to the same technical category.

[0054] Please see Figure 3 In one embodiment, the dielectric layer 231 includes an insulating medium 233, which is made of a material with both insulating and supporting capabilities to isolate the conductive thin film layer 232 from the at least one electrode layer 211. This prevents the establishment of a direct current flow path between the conductive thin film layer 232 and the at least one electrode layer 211, while still allowing energy transfer and maintaining electrical isolation. In one embodiment, the insulating medium 233 can be a gas. In another embodiment, the insulating medium 233 can be an insulating liquid.

[0055] Please see again Figures 1 to 2In another embodiment, when the insulating medium 233 cannot provide adequate support, the dielectric layer 231 is further provided with a plurality of spacers 234. These spacers 234 are distributed within the insulating medium 233, and are also insulating, providing the ability to isolate the conductive thin film layer 232 from the at least one electrode layer 211. In one embodiment, these spacers 234 may be implemented with a gas, which serves as the insulating medium 233. In another embodiment, these spacers 234 may be implemented with an insulating liquid, which serves as the insulating medium 233.

[0056] In another embodiment, the conductive thin film layer 232 is an indium tin oxide (ITO) film. In another embodiment, the anti-interference module 23 includes a support layer 235 located on the side of the dielectric layer 231 facing the at least one electrode layer 211, and the support layer 235 is used to support the dielectric layer 231 and the conductive thin film layer 232. In one embodiment, the support layer 235 may be a transparent glass or a transparent film. Continuing above, in one embodiment, the anti-interference module 23 has at least one adhesive 236 located between the support layer 235 and the conductive thin film layer 232, and disposed along the periphery of the support layer 235 and the conductive thin film layer 232 to bond the support layer 235 and the conductive thin film layer 232.

[0057] On the other hand, please refer to the following: Figures 1 to 9 In one embodiment, the touch structure 20 has an optical adhesive layer 25 located between the touch module 21 and the anti-interference module 23 to bond the touch module 21 and the anti-interference module 23. The optical adhesive layer 25 is light-transmitting, and when the touch structure 20 is combined with a display structure to form a touch display device, the optical adhesive layer 25 does not affect the display of the display structure.

[0058] On the other hand, in one embodiment, please refer to Figures 4 to 6 In this invention, the electrode layer 211 can be singular in number. The electrode layer 211 contains two conductive patterns that extend in two different directions and serve as two sub-layers within the same structural layer. These two conductive patterns are commonly referred to in the technical field as X Lines and Y Lines. When the capacitance of the two electrode patterns changes, the touch processing chip 30 can calculate the touch coordinates of the conductor 40 based on the location of the capacitance change. In another embodiment, please refer to... Figure 5 The touch module 21 may further include an auxiliary support layer 212, which is a transparent glass layer. This auxiliary support layer 212 is stacked below the electrode layer 211 to provide support for the electrode layer 211. In another embodiment, please refer to... Figure 6The touch module 21 may have an auxiliary anti-interference layer 213, which is disposed below the electrode layer 211.

[0059] In addition, please see Figures 1 to 3 In one embodiment, multiple electrode layers 211 may be provided, each with a different conductive pattern and extending in a different direction. One of the multiple electrode layers 211 is an X-line as commonly referred to in the art, and another of the multiple electrode layers 211 is a Y-line as commonly referred to in the art. In one embodiment, the touch module 21 has an adhesive layer 214 for bonding the multiple electrode layers 211.

[0060] Further, please refer to Figure 9 In one embodiment, the touch module 21 is provided with at least one auxiliary support layer 212, which provides auxiliary support and is disposed corresponding to one of the plurality of electrode layers 211. Please refer to Figure 8 In another embodiment, there are multiple auxiliary support layers 212, and each of the multiple auxiliary support layers 212 corresponds to one of the multiple electrode layers 211.

[0061] Please see Figure 7 In one embodiment, the touch module 21 is provided with at least one auxiliary anti-interference layer 213, which assists in shielding external noise. The auxiliary anti-interference layer 213 corresponds to one of the plurality of electrode layers 211. See also... Figure 2 In another embodiment, there are multiple auxiliary anti-interference layers 213, and each of the multiple auxiliary anti-interference layers 213 corresponds to one of the multiple electrode layers 211.

[0062] The above description is merely a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. All equivalent changes and modifications made in accordance with the claims of the present utility model should still fall within the scope of the patent of the present utility model.

Claims

1. A touch structure for reducing electromagnetic interference, characterized in that, Include: A touch module having at least one electrode layer; and An anti-interference module is provided, which forms a stacked structure with the touch module. The anti-interference module has a dielectric layer stacked on the touch module and a conductive thin film layer stacked on the dielectric layer. The conductive thin film layer serves as a touch surface of the touch structure but is not used to generate a touch signal. There is a potential difference between the conductive thin film layer and the at least one electrode layer. When the conductive thin film layer is touched, the distance between it and the at least one electrode layer changes, and the capacitance between it and the at least one electrode layer also changes.

2. The touch structure for reducing electromagnetic interference as described in claim 1, characterized in that, The dielectric layer contains an insulating medium.

3. The touch structure for reducing electromagnetic interference as described in claim 2, characterized in that, The dielectric layer contains multiple spacers distributed within the insulating medium.

4. The touch structure for reducing electromagnetic interference as described in claim 3, characterized in that, The insulating medium is a gas.

5. The touch structure for reducing electromagnetic interference as described in claim 3, characterized in that, The insulating medium is an insulating liquid.

6. The touch structure for reducing electromagnetic interference as described in any one of claims 1 to 5, characterized in that, The anti-interference module includes a support layer located on the side of the dielectric layer facing the at least one electrode layer.

7. The touch structure for reducing electromagnetic interference as described in claim 6, characterized in that, The anti-interference module has at least one adhesive that bonds the support layer to the conductive thin film layer.

8. The touch structure for reducing electromagnetic interference as described in any one of claims 1 to 5, characterized in that, The touch structure has an optical adhesive layer that bonds the touch module to the anti-interference module.

9. The touch structure for reducing electromagnetic interference as described in any one of claims 1 to 5, characterized in that, The touch module has multiple electrode layers.

10. The touch structure for reducing electromagnetic interference as described in claim 9, characterized in that, The touch module has at least one adhesive layer that bonds multiple electrode layers.

11. The touch structure for reducing electromagnetic interference as described in claim 10, characterized in that, The touch module has at least one auxiliary support layer, which corresponds to one of the plurality of electrode layers.

12. The touch structure for reducing electromagnetic interference as described in claim 10, characterized in that, The touch module has at least one auxiliary anti-interference layer, which corresponds to one of the plurality of electrode layers.

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