3D touch key and electronic device

Abstract

The utility model discloses a 3D touch button and electronic equipment, wherein the 3D touch button comprises 3D touch layer, optical adhesive layer and response base which are arranged in sequence, the 3D touch layer adopts reinforced glass material, is integrally formed through chemical etching and reinforcing process, and the side far from the optical adhesive layer is provided with at least one 3D raised button area; the side of the response base towards the optical adhesive layer is provided with the capacitive sensing unit corresponding to the 3D raised button area one by one, the optical adhesive layer is high-transmittance optical adhesive, completely covers the adhering surface of both, and the maximum stroke of the button area pressing is less than the sum of the raised height and the thickness of the touch layer. The application does not need to additionally set metal spring, silica gel raised part and other components, realizes three-dimensional pressing rebound touch feeling and blind operation accurate positioning, and has the advantages of light and thin, high sensitivity, waterproof and dustproof and long service life.

Description

Technical Field

[0001] This utility model relates to the technical field of touch interaction, and in particular to a 3D touch button and an electronic device. Background Technology

[0002] With the development of intelligent electronic devices, touch buttons are widely used in smartphones, tablets, vehicle central control systems, industrial control panels and other devices due to their convenient operation and simple appearance.

[0003] Traditional touch buttons are mostly flat, using a touchscreen located beneath a glass cover to achieve touch functionality. However, these flat touch buttons lack depth and three-dimensionality, resulting in less intuitive feedback and a less than ideal user experience. They lack the tactile feedback of physical buttons, making it difficult for users to accurately identify button positions during blind operation, and prolonged use can lead to user fatigue. Some tactile structures require additional components such as metal springs and silicone protrusions, increasing device thickness and assembly complexity, and potentially causing tactile degradation due to component aging, thus affecting lifespan. Furthermore, the sensitivity of existing touch buttons is easily affected by environmental factors. In high-temperature or humid environments, signal transmission between the button and the sensing module is prone to interference, leading to false triggers or delayed triggering. Moreover, the structural design of most touch buttons cannot adequately address waterproofing and dustproofing, making them susceptible to damage to internal circuitry from foreign objects in outdoor or industrial settings, thus limiting their application range. Utility Model Content

[0004] This utility model aims to at least partially solve one of the problems in related technologies. Therefore, one of the objectives of this utility model is to provide a 3D touch button that achieves a three-dimensional press-and-rebound tactile feedback and precise blind operation positioning, while also possessing advantages such as thinness, high sensitivity, waterproofing, dustproofing, and long lifespan.

[0005] A 3D touch button includes a 3D touch layer, an optical adhesive layer, and a sensing substrate stacked sequentially. The 3D touch layer has at least one 3D raised button area on the side away from the optical adhesive layer. The sensing substrate has capacitive sensing units corresponding to the 3D raised button areas on the side facing the optical adhesive layer. The optical adhesive layer completely covers the bonding surface of the 3D touch layer and the sensing substrate, and the maximum travel distance when the 3D raised button area is pressed is less than the sum of the raised height of the 3D raised button area and the thickness of the 3D touch layer.

[0006] Furthermore, the 3D touch layer is made of reinforced glass.

[0007] Furthermore, the thickness of the 3D touch layer is 300-2000μm.

[0008] Furthermore, the height of the 3D raised button area is 50-150μm.

[0009] Furthermore, the 3D raised button area has a rectangular, square, circular, or elliptical structure.

[0010] Furthermore, when the 3D raised button area is a rectangular structure, the four corners of the rectangle are arc-shaped corners.

[0011] Furthermore, the optical adhesive layer is a high-transmittance optical adhesive.

[0012] Furthermore, the capacitive sensing unit includes a sensing electrode and a signal processing chip. The sensing electrode is made of ITO transparent conductive film and is formed on the surface of the sensing substrate by photolithography. The sensing electrode is electrically connected to the signal processing chip.

[0013] This utility model also proposes an electronic device, including a device housing, a motherboard, a display screen, and a 3D touch button as described above. The 3D touch button is embedded in the operating surface of the device housing or the display screen, and the sensing substrate is electrically connected to the motherboard via an FPC.

[0014] Furthermore, the electronic device is a smartphone, a vehicle central control screen, an industrial control panel, or a smart home controller.

[0015] The technical solutions provided in this application have the following advantages compared with the prior art: This application's 3D touch button comprises a 3D touch layer, an optical adhesive layer, and a sensing substrate. At least one 3D raised button area is located on the side of the 3D touch layer away from the optical adhesive layer. This raised button area is made of reinforced glass and formed into a three-dimensional structure through chemical etching and strengthening processes. This allows for a realistic tactile feedback when pressed and retains its normal triggering function even after multiple presses, resulting in a long service life and precise positioning during blind operation. Furthermore, it eliminates the need for additional metal springs, silicone protrusions, or other components. The integrated design of the 3D touch layer, optical adhesive layer, and sensing substrate meets the requirements for thinner and lighter electronic devices. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] In the attached image: Figure 1 This is a schematic diagram of the structure of an embodiment of the 3D touch button of this application; Figure 2 This is a schematic diagram of the structure of the 3D touch button according to an embodiment of this application. Figure 3 This is a schematic diagram of the structure of the electronic device according to the first embodiment of this application; Figure 4 This is a schematic diagram of the structure of the second embodiment of the electronic device of this application; Figure 5 This is a schematic diagram of the structure of the electronic device according to the third embodiment of this application; Figure 6 This is a schematic diagram of the structure of the fourth embodiment of the electronic device of this application.

[0019] Figure label: 10. 3D touch layer; 11. 3D raised button area; 20. Optical adhesive layer; 30. Sensing substrate; 31. Capacitive sensing unit. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] like Figure 1 , Figure 2 As shown, this application provides a 3D touch button, including a 3D touch layer 10, an optical adhesive layer 20, and a sensing substrate 30 stacked sequentially. The 3D touch layer 10 has at least one 3D raised button area 11 on the side away from the optical adhesive layer 20. The sensing substrate 30 has capacitive sensing units 31 corresponding to the 3D raised button areas 11 on the side facing the optical adhesive layer 20. The optical adhesive layer 20 completely covers the bonding surface of the 3D touch layer 10 and the sensing substrate 30, and the maximum stroke of the 3D raised button area 11 when pressed is less than the sum of the raised height of the 3D raised button area 11 and the thickness of the 3D touch layer 10.

[0023] In the actual manufacturing process, the 3D touch layer 10 uses reinforced glass, which undergoes a special chemical etching and strengthening process to form precise 3D raised button areas 11 on its surface. The height of these 3D raised button areas 11 is strictly controlled to 80-120μm to ensure that users receive clear and comfortable tactile feedback when pressing. At the same time, the thickness of the 3D touch layer 10 is set within the range of 300-700μm, which ensures both structural stability and meets the requirements for a thinner and lighter device.

[0024] The 3D raised button area 11 features a flexible and diverse shape design, allowing users to choose from rectangular, square, circular, or oval structures based on the specific application scenario and user operating habits. When a rectangular structure is used, its four corners are specially designed as rounded corners. This design not only enhances the aesthetics of the buttons but also effectively avoids the risk of scratches caused by right angles during operation.

[0025] The optical adhesive layer 20 is made of high-transmittance optical adhesive. This adhesive layer can completely cover the bonding surface of the 3D touch layer 10 and the sensing substrate 30, ensuring a tight bond between the two, while not affecting the transmission of light, thus ensuring the sensitivity and accuracy of the touch button.

[0026] The capacitive sensing unit 31 on the sensing substrate 30 is the core component for realizing the touch function of the 3D touch button. It includes a sensing electrode and a signal processing chip. The sensing electrode uses an ITO transparent conductive film, which is formed on the surface of the sensing substrate 30 through a precise photolithography process. This design allows the sensing electrode to accurately sense the capacitance change generated when the user presses the 3D raised button area 11 and quickly transmit the signal to the signal processing chip. The signal processing chip then quickly processes and analyzes the received signal to determine the user's operation intention, thereby achieving accurate touch feedback.

[0027] In electronic device applications, this 3D touch button can be flexibly embedded in the operating surface or display screen of the device housing. The sensing substrate 30 is electrically connected to the motherboard via an FPC (flexible printed circuit board) to ensure stable signal transmission. This design enables the 3D touch button to be widely used in various electronic devices such as smartphones, in-vehicle central control screens, industrial control panels, or smart home controllers, providing users with a more convenient and intuitive touch operation experience.

[0028] Furthermore, the 3D touch layer 10 is made of reinforced glass.

[0029] The tempered glass material not only possesses high strength, effectively resisting scratches and impacts during daily use, ensuring that the 3D raised button area 11 is not easily worn or deformed during long-term pressing, maintaining stable tactile feedback; at the same time, after chemical strengthening treatment, the surface hardness of this material is significantly improved, resisting the adhesion of contaminants such as fingerprints and oil stains, maintaining the cleanliness and light transmittance of the button area, and further improving the accuracy of touch operation. In addition, the tempered glass material and the optical adhesive layer 20 have good adhesive compatibility, ensuring that the two form a strong bonding interface during the stacking and assembly process, avoiding problems such as delamination or detachment caused by changes in ambient temperature or mechanical vibration, thereby improving the overall reliability and service life of the 3D touch button.

[0030] Furthermore, the thickness of the 3D touch layer 10 is 300-2000μm.

[0031] The thickness of the 3D touch layer 10 is between 300-2000 μm, ensuring sufficient structural strength to support the three-dimensional structure of the 3D raised button area 11 and preventing excessive deformation or breakage during pressing. It also avoids increased overall device weight and cost due to excessive thickness. Simultaneously, this thickness range facilitates the formation of a uniform and dense adhesive layer 20 between the 3D touch layer 10 and the sensing substrate 30, ensuring unimpeded signal transmission and improving the sensitivity and stability of the touch buttons. Furthermore, the 300-2000 μm thickness aligns with the current trend towards thinner and lighter electronic devices, meeting users' demands for portability and aesthetics.

[0032] Furthermore, the height of the 3D raised button area 11 is 50-150μm.

[0033] The height of the 3D raised button area 11 is precisely set within the range of 50-150μm. This height design has been verified through extensive experiments, ensuring clear tactile feedback for users while avoiding inconvenience or accidental touches caused by excessively high buttons. When the user presses the button, the 50-150μm height generates sufficient deformation, allowing the capacitive sensing unit 31 to accurately detect pressure changes, thus achieving precise touch control. When the user releases the button, the 3D raised button area 11 quickly returns to its original shape, ensuring accuracy for the next operation. Furthermore, this height range also considers the button's durability; even under prolonged and frequent pressing, the 3D raised button area 11 is not prone to wear or deformation, thereby extending the lifespan of the 3D touch button.

[0034] Furthermore, the 3D raised button area 11 has a rectangular, square, circular, or elliptical structure.

[0035] The 3D raised button area 11 offers users a variety of shape designs to suit different electronic device interfaces and user habits. Rectangular button areas are suitable for scenarios requiring clear directional indication, such as directional control keys in gaming devices; square button areas, due to their clean and orderly appearance, are often used for function key layouts; circular button areas offer a smooth, rounded feel and are suitable for frequently clicked confirmation or back buttons; oval button areas combine the characteristics of rectangles and circles, providing both directional guidance and a comfortable tactile feel, making them suitable for scenarios requiring a balance between precision and comfort. These diverse shape designs not only enhance the practicality of the 3D touch buttons but also improve their aesthetics, making the electronic device interface more personalized and versatile.

[0036] Furthermore, when the 3D raised button area 11 is a rectangular structure, the four corners of the rectangle are arc-shaped corners.

[0037] The design of rounded corners at the four corners of the rectangular 3D raised button area 11 reflects multiple considerations. From a user experience perspective, rounded corners significantly improve operational comfort. During frequent button presses, sharp corners can cause discomfort or even minor abrasions due to the sharp angles, potentially leading to discomfort or even minor scratches over time. Rounded corners provide a smoother, more gentle touch, reducing discomfort and offering a more considerate design experience. From a safety perspective, rounded corners effectively reduce potential hazards. In certain scenarios, such as when users are rushing or distracted, sharp corners can pose a risk of injury, while rounded corners mitigate this risk, ensuring user safety. From an aesthetic standpoint, rounded corners give the buttons a softer, smoother appearance, softening the potentially harsh feel of rectangular buttons and creating a more harmonious and visually appealing 3D touchpad. This allows the buttons to integrate better into the overall design of the electronic device, enhancing the product's perceived quality and premium feel. In addition, this curved corner design is also feasible in terms of manufacturing process. Through advanced processing technology and mold design, this shape can be precisely processed to ensure the quality and consistency of the buttons.

[0038] Furthermore, the optical adhesive layer 20 is a high-transmittance optical adhesive.

[0039] High-transmittance optical adhesive possesses superior optical properties, with extremely high light transmittance, ensuring virtually lossless light transmission between the 3D touch layer 10 and the sensing substrate 30. During the operation of the 3D touch button, light needs to travel smoothly between layers to achieve accurate touch sensing. If the optical adhesive layer 20 has poor light transmittance, light will attenuate and scatter during transmission, causing the capacitive sensing unit 31 on the sensing substrate 30 to be unable to accurately receive the signal changes generated when the 3D raised button area 11 is pressed, thus affecting the sensitivity and accuracy of the touch button. High-transmittance optical adhesive effectively avoids this problem, providing reliable optical protection for the normal operation of the touch button.

[0040] Meanwhile, the high-transmittance optical adhesive also possesses excellent adhesion properties. It can completely cover the bonding surfaces of the 3D touch layer 10 and the sensing substrate 30, forming a uniform and dense adhesive layer. This strong adhesion ensures that the 3D touch layer 10 and the sensing substrate 30 will not delaminate or detach due to environmental temperature changes, mechanical vibrations, or other factors during long-term use. In actual use, electronic devices may experience various environmental conditions, such as high temperature, low temperature, and humidity. The stable adhesion properties of the high-transmittance optical adhesive ensure that the 3D touch buttons maintain reliable operation even in these harsh environments, thereby extending the lifespan of the 3D touch buttons.

[0041] Furthermore, the high-transmittance optical adhesive also possesses a certain degree of elasticity and flexibility. When the 3D raised button area 11 is pressed, the optical adhesive layer 20 can elastically deform accordingly with the deformation of the 3D touch layer 10, without excessively hindering the movement of the 3D touch layer 10. After the user releases the button, the optical adhesive layer 20 can quickly return to its original shape, driving the 3D touch layer 10 back to its initial position, ensuring the accuracy of the next press operation. This elasticity and flexibility allows the 3D touch button to maintain good performance during repeated pressing, providing users with a stable and reliable touch experience. Moreover, the high-transmittance optical adhesive also has good chemical stability, and is not prone to chemical reactions with the materials of the 3D touch layer 10 and the sensing substrate 30, avoiding performance degradation caused by chemical corrosion, further ensuring the quality and reliability of the 3D touch button.

[0042] Furthermore, the capacitive sensing unit 31 includes a sensing electrode and a signal processing chip. The sensing electrode is made of ITO transparent conductive film and is formed on the surface of the sensing substrate 30 by photolithography. The sensing electrode is electrically connected to the signal processing chip.

[0043] ITO transparent conductive film, as a high-quality conductive material, possesses many characteristics suitable for application in sensing electrodes. Its high light transmittance ensures good conductivity while minimally affecting light transmission, which is crucial for smooth light transmission between layers in 3D touch buttons. Poor light transmittance of the sensing electrode can interfere with light signals, thereby affecting the accurate sensing of the 3D raised button area 11 by the capacitive sensing unit 31, reducing the sensitivity and accuracy of the touch button.

[0044] By forming an ITO transparent conductive film on the surface of the sensing substrate 30 using photolithography, high-precision patterning can be achieved. This process allows for precise control of the shape, size, and position of the sensing electrodes, ensuring a perfect correspondence with the 3D raised button area 11. For example, sensing electrodes of specific shapes can be designed to match rectangular, square, circular, or elliptical 3D raised button areas 11, based on different button shapes and functional requirements. This ensures that the sensing electrodes can accurately detect changes in capacitance when the user presses the button.

[0045] The electrical connection between the sensing electrodes and the signal processing chip is a crucial step in enabling the touch functionality of the 3D touch buttons. The signal processing chip, acting as the controller of the entire capacitive sensing unit 31, is responsible for rapidly processing and analyzing the signals received by the sensing electrodes. When a user presses the 3D raised button area 11, the sensing electrodes detect the change in capacitance and transmit this weak signal to the signal processing chip. Leveraging its powerful computing capabilities, the signal processing chip quickly analyzes and judges the signal, determining the user's intention, such as a single click, double click, or long press, and then transmits the corresponding instructions to the electronic device's motherboard, thereby achieving precise touch feedback.

[0046] This design, which uses an ITO transparent conductive film formed on the surface of the sensing substrate 30 through photolithography and then electrically connected to the signal processing chip, not only ensures the high sensitivity and accuracy of the capacitive sensing unit 31 but also provides excellent stability and reliability. During long-term use, the ITO transparent conductive film is not prone to aging or peeling, maintaining stable conductivity. The photolithographically formed sensing electrode pattern has high precision and good consistency, and will not deform or be damaged over time. The signal processing chip is carefully designed and optimized, possessing strong anti-interference capabilities and capable of operating normally in complex electromagnetic environments, ensuring that the 3D touch button provides users with a stable and reliable touch experience in various usage scenarios.

[0047] This utility model also proposes an electronic device, such as Figures 3 to 6As shown, the electronic device includes a device housing, a motherboard, a display screen, and a 3D touch button. The 3D touch button is embedded in the operating surface of the device housing or the display screen. The sensing substrate 30 is electrically connected to the motherboard via an FPC. The specific structure of the 3D touch button is as described in the above embodiments. Since this electronic device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0048] In practical applications, this type of electronic device demonstrates significant advantages thanks to its 3D touch buttons. When the 3D touch buttons are embedded in the operating surface of the device casing, they blend seamlessly with the overall appearance of the device, without disrupting its original design. For example, on smartphones, placing 3D touch buttons on the side operating surface allows users to easily adjust volume, take photos, and perform other operations. Furthermore, the raised, three-dimensional design of the buttons enables users to accurately locate them even when operating blindly, improving ease of use and accuracy. For some industrial control panels, the various shapes of the 3D touch buttons can be rationally arranged according to different functional areas. Rectangular buttons are used for directional control, square buttons for function selection, and circular buttons for confirming operations, making the entire interface clearer and more intuitive. Operators can perform various operations quickly and accurately, improving work efficiency.

[0049] When 3D touch buttons are embedded in the display screen, they bring users a brand-new interactive experience. In some in-vehicle infotainment screens, 3D touch buttons can be combined with virtual buttons on the display screen to create a more intuitive and convenient operating method. While driving, users don't need to spend too much time searching for buttons; they can simply touch the raised 3D button area 11 on the display screen to operate various functions, such as adjusting the air conditioning temperature and changing music, greatly improving driving safety. In smart home controllers, embedding 3D touch buttons in the display screen allows users to control various smart devices in their home, such as lights, curtains, and appliances, by touching the buttons. The tactile feedback of the buttons allows users to more intuitively feel the operation, enhancing the interaction between the user and the device.

[0050] The sensing substrate 30 is electrically connected to the motherboard via an FPC, ensuring stable signal transmission. The FPC's flexibility and bendability allow it to adapt to different shapes and spatial layouts within devices, preventing signal transmission quality from being affected by bending or vibration. During electronic device use, various environmental factors such as temperature changes and mechanical vibrations are inevitable. The stable connection of the FPC ensures that the 3D touch buttons continue to function normally under these conditions, without signal interruption or accidental touches. Furthermore, this electrical connection method facilitates device assembly and maintenance, reducing production costs and repair complexity.

[0051] Furthermore, this electronic device, thanks to its 3D touch buttons, boasts excellent adaptability and expandability. As technology advances and user needs evolve, the functions of electronic devices are constantly being updated and upgraded. The flexible design of the 3D touch buttons allows for easy functional expansion and modification. New functions or optimizations of existing functions can be achieved simply by upgrading the software of the signal processing chip in the capacitive sensing unit 31 or adjusting the layout of the sensing electrodes. For example, in some gaming devices, upgrading the signal processing chip's program can add more operating modes and gesture recognition functions to the 3D touch buttons, providing users with a richer gaming experience. This adaptability and expandability enable electronic devices to better meet the increasingly diverse needs of users, extending product lifespan and enhancing market competitiveness.

[0052] Furthermore, the electronic device is a smartphone, a vehicle central control screen, an industrial control panel, or a smart home controller.

[0053] As indispensable communication and entertainment tools in people's daily lives, smartphones have extremely high requirements for ease of operation and interactive experience. 3D touch buttons, embedded in the operating surface or display screen of smartphones, bring users a completely new operating experience. The raised, three-dimensional design of 3D touch buttons on the operating surface, such as volume control buttons and power buttons, allows users to accurately locate and operate the buttons by touch without looking at the phone, greatly improving the accuracy of blind operation. When 3D touch buttons are applied to the display screen, combined with virtual buttons, they form a more intuitive and convenient interaction method. When browsing the web, playing games, or using various applications, users can obtain more realistic and clear tactile feedback by touching the raised 3D button area 11, enhancing the immersive experience.

[0054] The in-vehicle central control screen is a crucial control center within the car, and its ease of operation and safety directly impact the driving experience. Embedding 3D touch buttons into the central control screen provides drivers with a safer and more efficient operating method. While driving, drivers don't need to take their eyes off the road excessively; a simple touch of the raised 3D button area 11 on the display screen allows them to easily adjust functions such as air conditioning temperature, audio volume, and navigation destination settings. The tactile feedback of the 3D touch buttons allows drivers to more accurately perceive the operation, avoiding errors caused by accidental touches and improving driving safety. Furthermore, the various shapes of the 3D touch buttons can be rationally arranged according to different functional areas, making the interface clearer and easier for drivers to quickly find the required function buttons.

[0055] Industrial control panels are widely used in various industrial production scenarios, and the accuracy and stability of their operation are crucial. The diverse shapes of 3D touch buttons, such as rectangles, squares, and circles, can meet the operational needs of different functional areas of industrial control panels. Rectangular buttons can be used for directional control, facilitating precise movement and adjustment of equipment by operators; square buttons can be used for function selection, making the interface more concise and organized; and circular buttons can be used for confirmation, with their smooth tactile feel providing greater comfort during use. The raised, three-dimensional design of the 3D touch buttons ensures that operators can accurately locate and operate the buttons even in industrial environments with vibrations, dust, and other interference factors, improving work efficiency and operational accuracy.

[0056] As the core of smart home device control, the smart home controller needs to provide users with a convenient and comfortable operating experience. By embedding 3D touch buttons on the smart home controller's display screen, users can control various smart devices in their home, such as lights, curtains, and appliances, simply by touching the buttons. The 3D touch buttons' tactile feedback allows users to intuitively feel the effects of the operation. For example, when adjusting the brightness of lights, touching the raised 3D button area 11 allows users to feel the button's deformation corresponding to the change in light brightness, enhancing the interaction between the user and the device. Furthermore, the various shapes of the 3D touch buttons can be differentiated according to different device control functions, making the operating interface more personalized and diverse, and allowing users to quickly find the control buttons they need.

[0057] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A 3D touch button, characterized in that, The device comprises a 3D touch layer, an optical adhesive layer, and a sensing substrate stacked sequentially. The 3D touch layer has at least one 3D raised button area on the side away from the optical adhesive layer. The sensing substrate has capacitive sensing units corresponding to the 3D raised button areas on the side facing the optical adhesive layer. The optical adhesive layer completely covers the bonding surface of the 3D touch layer and the sensing substrate, and the maximum travel when the 3D raised button area is pressed is less than the sum of the raised height of the 3D raised button area and the thickness of the 3D touch layer.

2. A 3D touch button according to claim 1, characterized in that, The 3D touch layer is made of reinforced glass.

3. A 3D touch button according to claim 1, characterized in that, The thickness of the 3D touch layer is 300-2000μm.

4. A 3D touch button according to claim 1, characterized in that, The height of the 3D raised button area is 50-150μm.

5. A 3D touch button according to claim 1, characterized in that, The 3D raised button area can be rectangular, square, circular, or elliptical.

6. A 3D touch button according to claim 5, characterized in that, When the 3D raised button area is rectangular, the four corners of the rectangle are arc-shaped corners.

7. A 3D touch button according to claim 1, characterized in that, The optical adhesive layer is a high-transmittance optical adhesive.

8. A 3D touch button according to claim 1, characterized in that, The capacitive sensing unit includes a sensing electrode and a signal processing chip. The sensing electrode is made of ITO transparent conductive film and is formed on the surface of the sensing substrate by photolithography. The sensing electrode is electrically connected to the signal processing chip.

9. An electronic device, characterized in that, The device includes a housing, a motherboard, a display screen, and a 3D touch button as described in any one of claims 1 to 8, wherein the 3D touch button is embedded in the operating surface of the housing or the display screen, and the sensing substrate is electrically connected to the motherboard via an FPC.

10. An electronic device according to claim 9, characterized in that, The electronic device is a smartphone, a vehicle central control screen, an industrial control panel, or a smart home controller.

Images