Touch device and touch equipment

Abstract

The application provides a touch device and a touch equipment, and belongs to the touch technical field. The touch device comprises a reference ground, an inductive electrode array and an excitation electrode layer. The inductive electrode array comprises a plurality of inductive electrodes. The excitation electrode layer is arranged between the inductive electrode and the reference ground, and the excitation electrode layer comprises at least one excitation electrode. Each of the at least one excitation electrode forms a corresponding relationship with at least one inductive electrode which can form a normal projection thereon. In a projection plane, the normal projection of each excitation electrode and the normal projection of the inductive electrode which forms a corresponding relationship with the excitation electrode at least partially coincide. In the projection plane, the area of the part of the normal projection of each excitation electrode which coincides with the normal projection of the at least one inductive electrode which forms a corresponding relationship with the excitation electrode is greater than 50% of the area of the normal projection of the inductive electrode which forms a corresponding relationship with the excitation electrode. In this way, the detection range suitable for the floating touch can be increased, and the detection height of the touch equipment is improved.

Description

Technical Field

[0001] This application relates to the field of touch technology, and in particular to a touch device and a touch equipment. Background Technology

[0002] When touch devices such as touchpads and touchscreens adopt hover touch technology, users do not need to touch the touch device with their fingers. They can simply hover or swipe above the touch device to perform touch operations.

[0003] In related technologies, touch devices employ self-inductive capacitance detection technology to achieve hover touch. Touch detection is achieved by detecting the change in capacitance formed when a finger approaches the sensing electrodes in the touch device. During hover touch, the distance between the user's finger and the sensing electrodes needs to be less than or equal to the detection range suitable for hover touch to ensure that the aforementioned capacitance change is effectively detected, thus achieving touch detection.

[0004] However, the sensing electrode is susceptible to interference from the reference ground. The parasitic capacitance formed between the sensing electrode and the reference ground affects the capacitance signal formed between the sensing electrode and the finger, resulting in a low effective detection range. This makes the detection range suitable for hover touch small and the detection height of the touch device low. Utility Model Content

[0005] This application provides a touch device and a touch equipment that can isolate the interference of the reference ground on the sensing electrode, increase the detection range suitable for hover touch, and improve the detection height of the touch equipment.

[0006] In a first aspect, embodiments of this application provide a touch device, which includes a reference ground, a sensing electrode array, and an excitation electrode layer. The sensing electrode array includes a plurality of sensing electrodes. The excitation electrode layer is disposed between the sensing electrodes and the reference ground, and includes at least one excitation electrode. Each of the at least one excitation electrode corresponds to at least one sensing electrode on which an orthographic projection can be formed. On a projection plane, the orthographic projection of each excitation electrode and the orthographic projection of the corresponding sensing electrode at least partially overlap. On the projection plane, the area of ​​the overlapping portion of the orthographic projection of each excitation electrode and the orthographic projection of the corresponding at least one sensing electrode is greater than 50% of the area of ​​the orthographic projection of the corresponding sensing electrode. The projection plane is a plane perpendicular to the thickness direction of the excitation electrode layer.

[0007] In this embodiment, since the excitation electrode is positioned between the reference ground and the sensing electrode, and the area of ​​the overlapping portion of the orthographic projection of the excitation electrode and the orthographic projection of the sensing electrode on the projection plane is greater than 50% of the area of ​​the orthographic projection of the sensing electrode, a capacitance is formed between the sensing electrode and the excitation electrode. This allows the excitation electrode to function as a shielding layer to isolate the interference of the reference ground on the sensing electrode, significantly reducing the parasitic capacitance between the sensing electrode and the reference ground. This improves the touch detection signal-to-noise ratio, thereby facilitating accurate detection of the touch position when the user's finger is in a hovering state. In this case, when using the touch device provided in this embodiment for hover touch, while ensuring touch detection accuracy, the detection range applicable to hover touch can be increased from 5mm to over 20mm, improving the user's comfort during hover touch.

[0008] In some possible implementations, the excitation electrode layer is composed of a single excitation electrode, which can excite each sensing electrode. Additionally, the structure of the electrical connection between the excitation electrode layer and the touch detection driving circuit can be simplified.

[0009] In some possible implementations, the excitation electrode layer includes multiple excitation electrodes, with the orthographic projections of any two excitation electrodes spaced apart on the projection plane, and each excitation electrode corresponding to at least one sensing electrode on which an orthographic projection can be formed.

[0010] Because the excitation electrode layer is composed of multiple spaced excitation electrodes, the excitation load capacitance can be reduced, which helps to further reduce the noise floor. In addition, each excitation electrode can simultaneously excite at least one corresponding sensing electrode, which simplifies the structure of the electrical connection between the excitation electrode layer and the drive circuit.

[0011] In some possible implementations, the orthographic projections of any two sensing electrodes on the projection plane are spaced apart, so that each sensing electrode detects a unique capacitance signal between the sensing electrode and the finger. No matter how many fingers touch or hover over the touch device at the same time, valid touch data can be detected, thus enabling multi-finger detection.

[0012] In some possible implementations, the touch device further includes a shielding electrode layer. This shielding electrode layer is disposed at the outer edge of the sensing electrode array and spaced apart from it. The shielding electrode layer and the sensing electrode array do not coincide in their orthographic projection on the projection plane. The shielding electrode layer is electrically connected to the excitation electrode layer. This configuration allows the shielding electrode layer to shield the sensing electrodes located at the edges of the sensing electrode array, reducing the impact of edge noise on these electrodes and thus minimizing interference, thereby improving their sensitivity.

[0013] In some possible implementations, in the direction from the excitation electrode layer to the sensing electrode array, the front surface of the shielding electrode layer is higher than the bottom surface of the sensing electrode array, and the bottom surface of the shielding electrode layer is lower than the first plane, which is a plane 1 mm higher than the top surface of the sensing electrode array. This arrangement ensures that the shielding electrode layer can effectively shield the sensing electrodes located at the edges of the sensing electrode array.

[0014] In some possible implementations, the orthographic projection of the shielding electrode layer onto the projection plane is annular, and the orthographic projection of the shielding electrode layer onto the projection plane surrounds the orthographic projection of the sensing electrode array onto the projection plane. This configuration can reduce interference experienced by the sensing electrodes located at the edges of the sensing electrode array, thereby improving the sensitivity of the sensing electrodes located at the edges of the sensing electrode array.

[0015] In some possible implementations, the shielding electrode layer includes multiple shielding electrodes, each of which is electrically connected to the excitation electrode layer, with adjacent shielding electrodes spaced apart. The orthographic projections of two adjacent shielding electrodes on the projection plane may partially overlap or not overlap.

[0016] Because adjacent shielding electrodes are spaced apart, there is a gap between them, resulting in a split structure for the shielding electrode layer. Furthermore, the gap between adjacent shielding electrodes can be used for structural components such as clips to pass through, facilitating manufacturing requirements. Additionally, when the orthographic projections of adjacent shielding electrodes on the projection plane do not coincide, the smaller the gap between them, the less interference the sensing electrode experiences, the less edge noise it receives, and the better the shielding effect.

[0017] In some possible implementations, the distance between the shielding electrode layer and the orthographic projection of the sensing electrode array on the projection plane is greater than zero and less than or equal to 1 mm, and the width of the shielding electrode layer is greater than or equal to 1 mm. This configuration ensures that the shielding electrode layer provides shielding, thereby reducing interference to the sensing electrodes located at the edges of the sensing electrode array.

[0018] In some possible implementations, the area of ​​the orthographic projection of the excitation electrode layer on the projection plane is less than fifty percent of the area of ​​the orthographic projection of the reference ground. This arrangement allows for a large-area design of the reference ground.

[0019] Because the excitation electrode layer can isolate the influence of the reference ground on the sensing electrode, the reference ground can function as a layer structure with positive gain. Therefore, when the area of ​​the reference ground is designed to be large, the equivalent capacitance between the finger and the sensing electrode can be further increased, which helps to further improve the detection sensitivity.

[0020] In some possible implementations, the reference ground includes the body, with the excitation electrode layer located between the body and the sensing electrode. In this configuration, the body serves as the reference ground for the touch device.

[0021] In some possible implementations, the reference ground also includes at least one conductive sheet, with at least one side of the body electrically connected to the conductive sheet. Thus, by electrically connecting the conductive sheet to at least one side of the body, the area of ​​the reference ground can be further increased, further increasing the equivalent capacitance between the finger and the sensing electrode, which helps to further improve detection sensitivity.

[0022] In some possible implementations, the conductive sheet can be a metallic or non-metallic conductive sheet, which can increase the area of ​​the reference ground, help increase the equivalent capacitance between the finger and the sensing electrode, and improve the detection sensitivity.

[0023] In some possible implementations, the touch device also includes a housing having a grip portion, the inner side of which is provided with a conductive sheet. By providing a conductive sheet, such as an arc-shaped conductive sheet, on the inner side of the grip portion held by the user's hand to increase the reference ground plane, the detection sensitivity can be further improved.

[0024] In some possible implementations, the main body is the middle frame. By using the middle frame as the reference ground for the touch device, the structure of the touch device can be simplified.

[0025] In some possible implementations, the spacing between the excitation electrode layer and the sensing electrode is greater than zero, and the spacing between the excitation electrode layer and the sensing electrode is less than or equal to 1 mm.

[0026] Since the distance between the excitation electrode layer and the sensing electrode is greater than zero and less than or equal to 1 mm, the capacitance formed between the excitation electrode layer and the sensing electrode can isolate the influence of the reference ground on the sensing electrode, ensuring that the excitation electrode layer plays the role of isolating the influence of the reference ground.

[0027] In some possible implementations, the spacing between the excitation electrode layer and the reference ground is greater than or equal to 0.01 mm, and the spacing between the excitation electrode layer and the reference ground is less than or equal to 10 mm.

[0028] By setting the spacing between the excitation electrode layer and the reference ground to 0.01 mm to 10 mm, it can be ensured that the excitation electrode layer can isolate the influence of the reference ground on the sensing electrode.

[0029] Secondly, embodiments of this application provide a touch device, which includes a touch apparatus as described in any of the first aspects.

[0030] In some possible implementations, the touch device is a touchpad. Optionally, the touchpad may or may not have a display screen. Attached Figure Description

[0031] Figure 1 This is a schematic diagram illustrating one application scenario of a touchpad.

[0032] Figure 2 A schematic diagram of the structure of a touch device provided in the application embodiment;

[0033] Figure 3 This is a schematic diagram of a touch state of a sensing electrode in a related technology;

[0034] Figure 4 This is a schematic diagram of the architecture of a first type of touch device provided in an embodiment of this application;

[0035] Figure 5 for Figure 4 A cross-sectional view of the touch device in the diagram;

[0036] Figure 6 This is a cross-sectional schematic diagram of a second type of touch device provided in an embodiment of this application;

[0037] Figure 7 This is a three-dimensional structural diagram of a third type of touch device provided in the embodiments of this application;

[0038] Figure 8 This is a cross-sectional schematic diagram of a fourth type of touch device provided in the embodiments of this application;

[0039] Figure 9 A top view schematic diagram of the fifth type of touch device provided in the embodiments of this application;

[0040] Figure 10 for Figure 9 A schematic diagram of the touch device architecture is shown.

[0041] Figure 11 A top view schematic diagram of the sixth type of touch device provided in the embodiments of this application;

[0042] Figure 12 This is a cross-sectional schematic diagram of the seventh type of touch device provided in the embodiments of this application;

[0043] Figure 13 A cross-sectional schematic diagram of the eighth type of touch device provided in the embodiments of this application;

[0044] Figure 14 A cross-sectional schematic diagram of the ninth type of touch device provided in the embodiments of this application;

[0045] Figure 15 This is a cross-sectional schematic diagram of the tenth touch device provided in the embodiments of this application.

[0046] Explanation of reference numerals in the attached figures:

[0047] 10. Touch screen devices;

[0048] 20. Controlled equipment;

[0049] 100. Touch screen device;

[0050] 110. Induction electrode array;

[0051] RX, sensing electrode;

[0052] 120. Excitation electrode layer;

[0053] TX, excitation electrode;

[0054] 130. Reference location;

[0055] 131. Main body; 132. Conductive sheet;

[0056] 140. Shielding electrode layer;

[0057] 141. Shielding electrode;

[0058] 150. Insulation layer;

[0059] 160. Outer shell; 161. Grip part;

[0060] 170. First plane;

[0061] 200. Cover plate;

[0062] 300. Circuit board components;

[0063] 400. Processor;

[0064] 500. Touch detection drive circuit;

[0065] 510. Capacitance detection unit; 520. Excitation unit;

[0066] 600. Touch electrodes;

[0067] 700, back cover. Detailed Implementation

[0068] The terminology used in the implementation section of this application is for the purpose of explaining specific embodiments of this application only, and is not intended to limit this application.

[0069] This application provides a touch device 10, which may include, but is not limited to, touchpads, mobile phones, tablet computers (PADs), laptops, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices, in-vehicle devices, wearable devices, virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical care, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, smart door locks, and other electronic devices with touch functionality.

[0070] The following explanation uses touch device 10 as an example of a touchpad.

[0071] Figure 1 This is a schematic diagram illustrating one application scenario of a touchpad.

[0072] like Figure 1 As shown, when the touch device 10 is a touchpad, the touchpad can be connected to the controlled device 20 wirelessly. Alternatively, the touchpad can be connected to the controlled device 20 via a wired connection. After the touchpad and the controlled device 20 are connected, when the user's finger performs a touch operation on the touchpad, the user can control the controlled device 20 to perform corresponding operations. For example, if the controlled device 20 is a large-screen device, while the user's finger is operating the touchpad, the user can obtain the touch position of their finger on the large-screen device's display screen by looking at the large-screen device, thus enabling touch operation even at a certain distance from the large-screen device.

[0073] The controlled device 20 may include, but is not limited to, electronic devices such as mobile phones, tablets, laptops, monitors, and televisions.

[0074] Figure 2 This is a schematic diagram of the structure of a touch device 10 provided in the application embodiment.

[0075] In the embodiments of this application, such as Figure 2 As shown, the touch device 10 includes a touch electrode 600, a cover plate 200, and a touch detection driving circuit 500. The cover plate 200 covers the touch electrode 600. The touch electrode 600 is electrically connected to the touch detection driving circuit 500, which is used to input touch excitation signals to the touch electrode 600 and receive detection signals from the touch electrode 600 to achieve touch detection.

[0076] The cover plate 200 can be a substrate made of glass, polyethylene terephthalate (PET), or polycarbonate (PC). The cover plate 200 can be transparent (e.g., with a light transmittance of over 85%) or completely opaque.

[0077] Of course, in addition to the touch electrode 600, cover plate 200 and touch detection driving circuit 500, the touch device 10 may also include other components, such as back cover, middle frame, battery, communication module and other components.

[0078] At least portions of the back cover and cover plate 200 are respectively disposed on both sides of the middle frame. The cover plate 200, back cover, and middle frame together form a device mounting cavity, which can be used to mount components such as the touch electrode 600, battery, and motherboard. The middle frame can be fixedly connected to the back cover and cover plate 200 respectively. The middle frame can be fixedly connected to the cover plate 200 by adhesive bonding. The middle frame can be fixedly connected to the back cover by welding, snap-fit, or other methods. Alternatively, the middle frame and back cover can be an integral structure. The back cover can be a metal back cover, a non-metal back cover, or a composite back cover made of metal and non-metal materials.

[0079] The aforementioned battery can be used to power various components of the touch device 10, such as the communication module and the processor 400. Additionally, the communication module can be used to enable wireless communication between the touch device 10 and the controlled device 20.

[0080] When the touch device 10 uses hover touch technology, the user's finger does not need to touch the touch device 10. They only need to hover or swipe above the touch device 10 to perform touch operations. Understandably, a touch device with hover detection capability can also have contact touch detection capability.

[0081] Figure 3 This is a schematic diagram of a touch state of a sensing electrode in related technologies.

[0082] In related technologies, touch devices employ self-inductive capacitance detection technology to achieve hover touch, such as... Figure 3 As shown, the touch electrode is a sensing electrode (or self-capacitance electrode) 820. When a user's finger approaches the sensing electrode 820, an equivalent capacitance Cp is formed between the finger and the sensing electrode 820. Simultaneously, the touch detection driving circuit 810 provides a touch excitation signal to the sensing electrode 820 and detects the charging and discharging time of the equivalent capacitance Cp. Based on the detected charging and discharging time, the size of the equivalent capacitance Cp can be calculated, achieving the purpose of touch detection. Meanwhile, as... Figure 3 As shown, a parasitic capacitance Cm is formed between the sensing electrode 820 and the reference ground. During the scanning of the sensing electrode 820, the touch detection driving circuit 810 detects the charging and discharging time of the parasitic capacitance Cm.

[0083] However, during the measurement of the equivalent capacitance Cp, the touch detection driving circuit 810 detects the charging and discharging process of the parasitic capacitance Cm, which acts as noise and affects the measurement accuracy of the equivalent capacitance Cp. This results in a lower effective detection range, making the detection range suitable for hover touch a small one. In other words, the reference ground interferes with the sensing electrode 820, resulting in a lower detection height for the touch device.

[0084] Furthermore, during hover touch, the distance between the user's finger and the sensing electrode 820 needs to be less than or equal to the detection range suitable for hover touch, such as 5mm. This ensures that the change in the equivalent capacitance Cp can be effectively detected, thus achieving touch detection. When the distance between the user's finger and the sensing electrode 820 exceeds 5mm, the equivalent capacitance Cp is too small, resulting in too low accuracy of the touch detection data, making it impossible to achieve touch detection.

[0085] Figure 4 This is a schematic diagram of the architecture of the first type of touch device 100 provided in the embodiments of this application. Figure 5 for Figure 4 A cross-sectional view of the touch device 100.

[0086] It should be noted that, in Figure 4 In the above view, the positional relationship between the reference ground 130, the sensing electrode array 110, and the excitation electrode layer 120 is the relationship between the three when the touch device 100 is in a top-down view. Meanwhile, the positional relationship between the touch detection driving circuit 500 and the processor 400 does not constitute a limitation on the specific positions of the touch detection circuit and the processor 400.

[0087] In the figure, the X-axis is the first direction, the Y-axis is the second direction, and the Z-axis is the third direction. Any two of the first, second, and third directions are perpendicular. In some embodiments, one of the first and second directions can be the length direction of the touch device 10 or the touch apparatus 100, and the other direction can be the width direction of the touch device 10 or the touch apparatus 100. The third direction can be the thickness direction of the excitation electrode layer 120.

[0088] In view of this, this application provides a touch device 100, which can be integrated into the touch devices 10 such as touchpads, displays, and tablet computers described above.

[0089] like Figure 4 As shown, the touch device 100 includes a reference ground 130, a sensing electrode array 110, and an excitation electrode layer 120. The sensing electrode array 110 includes a plurality of sensing electrodes RX, for example... Figure 4 As shown, the number of sensing electrodes RX is 35. Of course, the number of sensing electrodes RX can be more or less than 35. See also Figure 5 The excitation electrode layer 120 is disposed between the sensing electrode RX and the reference ground 130, and the excitation electrode layer 120 is disposed at intervals from the sensing electrode RX and the reference ground 130 respectively.

[0090] The excitation electrode layer 120 includes at least one excitation electrode TX, each of which corresponds to at least one sensing electrode RX on which an orthographic projection can be formed, such that each excitation electrode TX is opposite to at least one sensing electrode RX along the thickness direction of the excitation electrode layer 120. On the projection plane, the orthographic projection of each excitation electrode TX and the orthographic projection of the corresponding sensing electrode RX at least partially overlap. On the projection plane, the area of ​​the overlapping portion of the orthographic projection of each excitation electrode TX and the orthographic projection of the corresponding sensing electrode RX is greater than fifty percent of the area of ​​the orthographic projection of the corresponding sensing electrode RX. The projection plane is perpendicular to the thickness direction of the excitation electrode layer 120 (e.g., ...). Figure 5 The plane in the Z direction.

[0091] The overlap between the orthographic projections of the excitation electrode TX and the sensing electrode RX on the projection plane can be understood as follows: The touch device 100 includes at least one electrode group, each electrode group including one excitation electrode TX and at least one sensing electrode RX. When there are multiple electrode groups, the orthographic projections of the sensing electrodes RX of any two electrode groups on the projection plane do not overlap, and the orthographic projections of the excitation electrodes TX of any two electrode groups on the projection plane do not overlap. In any electrode group, any sensing electrode RX can form an orthographic projection on the excitation electrode TX, and at least a portion of the orthographic projection of any sensing electrode RX on the projection plane overlaps with the orthographic projection of the excitation electrode TX on the projection plane. In any electrode group, the area of ​​the portion on the projection plane where the orthographic projection of the excitation electrode TX overlaps with the orthographic projection of at least one sensing electrode RX is greater than 50% of the area of ​​the orthographic projection of the sensing electrode RX.

[0092] For example, the touch device 100 includes an electrode group comprising an excitation electrode TX and five sensing electrodes RX. On a projection plane, the orthographic projection of each sensing electrode RX at least partially overlaps with the orthographic projection of the excitation electrode TX. On the projection plane, the area of ​​the portion where the orthographic projection of the excitation electrode TX overlaps with the orthographic projections of three of the five sensing electrodes RX is greater than 50% of the area of ​​the orthographic projection of the sensing electrode RX. On the projection plane, the area of ​​the portion where the orthographic projection of the excitation electrode TX overlaps with the orthographic projections of the other two of the five sensing electrodes RX is less than or equal to 50% of the area of ​​the orthographic projection of the sensing electrode RX.

[0093] Of course, when the area of ​​the part where the orthographic projection of the excitation electrode TX overlaps with the orthographic projection of the induction electrode RX on the projection plane is greater than 50% of the area of ​​the orthographic projection of the induction electrode RX, in addition to the number of induction electrodes RX being three out of five, in some embodiments, the area of ​​the part where the orthographic projection of the excitation electrode TX overlaps with the orthographic projection of each induction electrode RX is greater than 50% of the area of ​​the orthographic projection of the induction electrode RX.

[0094] In this embodiment, since the excitation electrode TX is disposed between the reference ground 130 and the sensing electrode RX, and when the area of ​​the portion where the orthographic projection of the excitation electrode TX on the projection plane overlaps with the orthographic projection of the sensing electrode RX on the projection plane is greater than 50% of the area of ​​the orthographic projection of the sensing electrode RX, a capacitor is formed between the sensing electrode RX and the excitation electrode TX. This allows the excitation electrode TX to function as a shielding layer to isolate the interference of the reference ground 130 on the sensing electrode RX, significantly reducing the parasitic capacitance formed between the sensing electrode RX and the reference ground 130. This improves the signal-to-noise ratio of touch detection, thereby facilitating accurate detection of the touch position when the user's finger is in a hovering state. In this case, when using the touch device 10 provided in this embodiment for hover touch, while ensuring touch detection accuracy, the detection range applicable to hover touch can be increased from 5mm to over 20mm, which is beneficial to improving the user's comfort during hover touch.

[0095] In addition, a capacitance is also formed between the excitation electrode TX and the reference ground 130. At this time, the sensing electrode RX will not detect the capacitance between the reference ground 130 and the excitation electrode layer 120, thus avoiding the influence of the capacitance between the excitation electrode layer 120 and the reference ground 130 on the sensing electrode RX, and ensuring the touch detection accuracy.

[0096] In some embodiments, the excitation electrode layer 120 may also be referred to as the transmitting electrode layer or transmitting electrode array, and / or the sensing electrode array 110 may also be referred to as the receiving electrode array or receiving electrode layer, in which case the sensing electrode RX may also be referred to as the receiving electrode.

[0097] It should be noted that the sensing electrode RX is functionally equivalent to the touch electrode 600 described above, and the excitation electrode TX is also functionally equivalent to the excitation electrode TX described above. Therefore, the touch device 100 may include a plurality of touch electrodes 600, some of which are excitation electrodes TX and others are sensing electrodes RX.

[0098] To achieve touch detection, such as Figure 4As shown, the touch device 100 also includes a touch detection driving circuit 500, which may include a capacitance detection unit 510 and an excitation unit 520. The excitation unit 520 is electrically connected to the excitation electrode layer 120 and can send a touch excitation signal to the excitation electrode layer 120 to charge the parasitic capacitance between the excitation electrode layer 120 and the sensing electrode RX. The capacitance detection unit 510 is electrically connected to each sensing electrode RX. During the process of the excitation unit 520 sending the touch excitation signal to the excitation electrode layer 120, the capacitance detection unit 510 detects the detection signal of the sensing electrode RX, determines the discharge time of the parasitic capacitance between the excitation electrode layer 120 and the sensing unit, and obtains the capacitance value of the parasitic capacitance.

[0099] When a finger is not near the sensing electrode RX, the parasitic capacitance between the excitation electrode layer 120 and the sensing electrode RX is constant. When a finger approaches the sensing electrode RX, the finger can be equivalent to the reference ground 130 (e.g., 0V), forming an equivalent capacitance with the sensing electrode RX. At this time, the equivalent capacitance between the finger and the sensing electrode RX is connected in parallel to the two ends of the parasitic capacitance between the excitation electrode layer 120 and the sensing electrode RX. In this way, when the touch detection driving circuit 500 detects an increase in capacitance value, it can determine that a finger has touched the object, thereby achieving the purpose of touch detection.

[0100] like Figure 4 As shown, the touch device 100 also includes a processor 400, which can be a central processing unit (CPU) or a system-on-a-chip (SoC). The processor 400 is electrically connected to the capacitance detection unit 510 and the excitation unit 520, respectively, and is grounded by being electrically connected to a reference ground 130. The processor 400 can receive the detection results from the touch detection driving circuit 500 and determine the position of the finger touch and the type of gesture based on the detection results. Furthermore, the processor 400 can output control signals to the touch detection driving circuit 500 to control the touch detection process of the touch detection driving circuit 500.

[0101] In some embodiments, the touch device 100 may include at least one circuit board, in which case the processor 400 and the touch detection driving circuit 500 may be disposed on the same circuit board. In other embodiments, the processor 400 and the touch detection driving circuit 500 may be disposed on different circuit boards.

[0102] In some embodiments, see Figure 5The touch device 100 may further include a circuit board 300, which includes an excitation electrode layer 120 and a sensing electrode array 110. In this case, the excitation electrode layer 120 and the sensing electrode array 110 may be fabricated using different conductive layers on the circuit board 300, for example... Figure 5 As shown, the sensing electrode array 110 and the excitation electrode layer 120 can be composed of two different conductive layers, and the two conductive layers are insulated from each other by an insulating layer 150.

[0103] The circuit board component 300 can be a printed circuit board (PCB), or it can be a flexible printed circuit board (FPC), or it can be a rigid-flex board, which includes a flexible part and a rigid part, wherein the flexible part is an FPC and the rigid part is a PCB.

[0104] It should be noted that when the sensing electrode array 110 and the excitation electrode layer 120 are formed by the conductive layer on the circuit board 300, an electrical connection structure can also be provided on the circuit board 300. The electrical connection structure is used to realize the electrical connection between the touch detection driving circuit 500 and the sensing electrode array 110 and the excitation electrode layer 120. For example, the electrical connection structure may include structures such as metallized vias and / or metal traces.

[0105] It should be noted that when the excitation electrode layer 120 and the sensing electrode array 110 are made through a conductive layer on the circuit board, the excitation electrode layer 120 may be provided with notches and / or through holes for metallized vias to pass through or for accommodating traces and other structures electrically connected to the touch detection driving circuit 500.

[0106] In some possible implementations, such as Figure 5 As shown, the edge of the excitation electrode layer 120 can be aligned with the edge of the sensing electrode array 110 in a direction perpendicular to a third direction (e.g., ...). Figure 5 Aligned upwards (in the X direction). Of course, as... Figure 4 As shown, the edge of the excitation electrode layer 120 can also be located outside the edge of the sensing electrode array 110.

[0107] In some possible implementations, such as Figure 5 As shown, the excitation electrode layer 120 is formed by a single excitation electrode TX. In this case, the excitation electrode layer 120 is a single integrated structure, equivalent to a whole board structure. Each sensing electrode RX is simultaneously excited by a single excitation electrode TX. Furthermore, this simplifies the electrical connection between the excitation electrode layer 120 and the touch detection driving circuit 500.

[0108] When the excitation electrode layer 120 is formed by an excitation electrode TX, the excitation electrode TX and the orthographic projection of each sensing electrode RX on the projection plane at least partially coincide. At the same time, the area of ​​the portion where the orthographic projection of the excitation electrode TX on the projection plane coincides with the orthographic projection of at least one sensing electrode RX on the projection plane is greater than fifty percent of the area of ​​the orthographic projection of the sensing electrode RX on the projection plane.

[0109] Specifically, the area of ​​the portion where the orthographic projection of the excitation electrode TX on the projection plane overlaps with the orthographic projection of each sensing electrode RX on the projection plane is greater than 50% of the area of ​​the orthographic projection of the sensing electrode RX on the projection plane. Alternatively, the area of ​​the portion where the orthographic projection of the excitation electrode TX on the projection plane overlaps with the orthographic projection of a portion of the multiple sensing electrodes RX on the projection plane is greater than 50% of the area of ​​the orthographic projection of the sensing electrodes RX on the projection plane. For example, the portion of the multiple sensing electrodes RX that satisfies the area ratio condition is a portion that has a significantly higher proportion among the multiple sensing electrodes RX.

[0110] Figure 6 This is a cross-sectional schematic diagram of a second type of touch device 100 provided in an embodiment of this application.

[0111] Of course, in some possible implementations, besides being composed of a single excitation electrode TX, the excitation electrode layer 120 may include multiple excitation electrodes TX, such as... Figure 6 As shown, there are two excitation electrodes TX, although there can be more than two. On the projection plane, the orthographic projections of any two excitation electrodes TX are spaced apart, and each excitation electrode TX corresponds to at least one sensing electrode RX that can form an orthographic projection on it.

[0112] It is understood that when the excitation electrode layer 120 is composed of multiple excitation electrodes TX, the multiple excitation electrodes TX and multiple sensing electrodes RX can form multiple electrode groups. Each electrode group includes one excitation electrode TX and at least one sensing electrode RX. The orthographic projections of the sensing electrodes RX of any two electrode groups on the projection plane do not coincide, and the orthographic projections of the excitation electrodes TX of any two electrode groups on the projection plane do not coincide. In each electrode group, the excitation electrode TX and any one of the sensing electrodes RX form the correspondence described above.

[0113] Since the excitation electrode layer 120 is composed of multiple spaced excitation electrodes TX, the excitation load capacitance can be reduced, which helps to further reduce the noise floor. In addition, each excitation electrode TX can simultaneously excite at least one corresponding sensing electrode RX, which simplifies the structure of the electrical connection between the excitation electrode layer 120 and the drive circuit.

[0114] In some embodiments, such as Figure 6 As shown, multiple excitation electrodes TX are arranged on the same layer, meaning that the spacing between any two excitation electrodes TX and the reference ground 130 is the same. Alternatively, the multiple excitation electrodes TX are formed by the same conductive layer of the circuit board component 300.

[0115] In other embodiments, at least two excitation electrodes TX are spaced apart in the third direction, that is, multiple excitation electrodes TX can be made by multiple conductive layers of different layers on the circuit board 300.

[0116] In some possible implementations, along a third direction (such as...) Figure 6 (in the Z direction), the spacing between the excitation electrode layer 120 and the sensing electrode RX (e.g., in the Z direction) Figure 6 If D1 is greater than zero, the distance between the excitation electrode layer 120 and the sensing electrode RX is less than or equal to 1 mm. Since the distance between the excitation electrode layer 120 and the sensing electrode RX is greater than zero and less than or equal to 1 mm, the capacitance formed between the excitation electrode layer 120 and the sensing electrode RX can isolate the influence of the reference ground 130 on the sensing electrode RX, ensuring that the excitation electrode layer 120 plays the role of isolating the influence of the reference ground 130.

[0117] When there is only one excitation electrode TX, the distance between the excitation electrode TX and any one of the sensing electrodes RX in the third direction is greater than 0 and less than or equal to 1 mm. The distances between any two sensing electrodes RX and the excitation electrode TX can be the same, or some of the sensing electrodes RX can have the same distance from the excitation electrode TX, while others can have different distances.

[0118] When there are multiple excitation electrodes TX, there are multiple electrode groups. In any electrode group, the distance between the excitation electrode TX and any sensing electrode RX in the third direction is greater than 0 and less than or equal to 1 mm. In any electrode group, the distance between any two sensing electrodes RX and the excitation electrode TX can be the same, or, some of the multiple sensing electrodes RX can have the same distance from the excitation electrode TX, while other parts can have different distances from the excitation electrode TX.

[0119] When there are multiple electrode groups, the spacing between the excitation electrode TX and the sensing electrode RX in any two electrode groups can be the same, or the spacing between the excitation electrode TX and the sensing electrode RX in some of the multiple electrode groups can be the same, while the spacing between the excitation electrode TX and the sensing electrode RX in other groups can be different.

[0120] In some possible implementations, the spacing between the excitation electrode layer 120 and the reference ground 130 (e.g.) Figure 6The distance between the excitation electrode layer 120 and the reference ground 130 is less than or equal to 10 mm, and the distance between the excitation electrode layer 120 and the reference ground 130 is greater than or equal to 0.01 mm. By setting the distance between the excitation electrode layer 120 and the reference ground 130 to 0.01 mm to 10 mm, it can be ensured that the excitation electrode layer 120 can isolate the influence of the reference ground 130 on the sensing electrode RX, which helps to reduce the parasitic capacitance formed between the reference ground 130 and the sensing electrode RX.

[0121] When the excitation electrode layer 120 is formed by an excitation electrode TX, the spacing between the excitation electrode TX and the reference ground 130 at various points in the direction perpendicular to the third direction can be the same or different.

[0122] When the excitation electrode layer 120 is composed of multiple excitation electrodes TX, the spacing between each excitation electrode TX and the reference ground 130 can be the same or different. Alternatively, some of the multiple excitation electrodes TX can have the same spacing with the reference ground 130, while others can have different spacings. Furthermore, for the same excitation electrode TX, the spacing between the excitation electrode TX and the reference ground 130 at various points in a direction perpendicular to a third direction can be the same or different.

[0123] In some possible implementations, the orthographic projections of any two sensing electrodes RX on the projection plane are spaced apart. This arrangement ensures that the capacitance signal detected by each sensing electrode RX between the sensing electrode RX and the finger is unique, so that no matter how many fingers simultaneously touch or hover over the touch device 100, valid touch data can be detected, enabling multi-finger detection.

[0124] In some embodiments, such as Figure 4 As shown, any two sensing electrodes RX can also have the same shape.

[0125] Figure 7 A three-dimensional structural diagram of the third type of touch device 100 provided in the embodiments of this application.

[0126] In some embodiments, such as Figure 7 As shown, some of the multiple sensing electrodes RX can have the same shape, while others can have different shapes.

[0127] In some embodiments, such as Figure 7 As shown, multiple sensing electrodes RX can be arranged along a first direction and a second direction. That is, the sensing electrode array 110 can include multiple rows arranged side by side and spaced apart along the first direction, and each row group can include sensing electrodes RX arranged side by side and spaced apart along the second direction.

[0128] It should be noted that the sensing electrode array 110 can be made of one conductive layer on the circuit board 300, or the sensing electrode array 110 can be made of at least two conductive layers located on different layers on the circuit board 300.

[0129] It should also be noted that, in addition to the orthographic projection intervals of any two sensing electrodes RX on the projection plane, in some embodiments, the multiple sensing electrodes RX may include multiple first sensing electrodes and multiple second sensing electrodes, the multiple first sensing electrodes are arranged at intervals along a first direction, the multiple second sensing electrodes are arranged at intervals along a second direction, and the orthographic projection portions of the first sensing electrodes and the second sensing electrodes on the projection plane overlap.

[0130] In some possible implementations, the area of ​​the orthographic projection of the excitation electrode layer 120 on the projection plane is less than fifty percent of the area of ​​the orthographic projection of the reference ground 130. Of course, the area of ​​the orthographic projection of the excitation electrode layer 120 can also be greater than or equal to fifty percent of the area of ​​the orthographic projection of the reference ground 130.

[0131] Since the excitation electrode layer 120 can isolate the influence of the reference ground 130 on the sensing electrode RX, the reference ground 130 can function as a layer structure with positive gain. When the area of ​​the excitation electrode layer 120 projected onto the projection plane is less than 50% of the area of ​​the reference ground 130 projected onto the projection plane, it means that the area of ​​the reference ground 130 is a large-area design, which can further increase the equivalent capacitance between the finger and the sensing electrode RX, thus helping to further improve the detection sensitivity.

[0132] In some possible implementations, such as Figure 7 As shown, the reference ground 130 includes a main body 131, and the excitation electrode layer 120 is located between the main body 131 and the sensing electrode RX. Using the main body 131 as the reference ground plane of the reference ground 130 simplifies the structure of the touch device 10.

[0133] The main body 131 can be a metal body or an alloy body, such as an aluminum body or an aluminum alloy body. In addition, part of the main body 131 can be made of metal and another part can be made of non-metal.

[0134] The specific structure of the main body 131 is not limited here. In some embodiments, the main body 131 can be a flat plate structure.

[0135] Alternatively, in some embodiments, the main body 131 can be a middle frame, and using the middle frame as the reference ground plane where the reference ground 130 is located can simplify the structure of the touch device 10.

[0136] For example, the middle frame may include a middle plate and a frame, the middle plate being disposed inside the frame and fixedly connected to the inner sidewall of the frame. The excitation electrode layer 120 is disposed between the middle plate and the sensing electrode array 110, and the orthographic projections of the excitation electrode layer 120 and the middle plate on the projection plane may at least partially overlap.

[0137] In some embodiments, the touch device 10 may further include a motherboard, and the main body 131 may be electrically connected to the power ground of the motherboard. The main body 131 may be electrically connected to the power ground of the motherboard via structures such as metal traces, spring contacts, or metal plates.

[0138] In some possible implementations, reference 130 further includes at least one conductive sheet 132, with at least one side of the body 131 electrically connected to the conductive sheet 132, for example... Figure 7 As shown, the main body 131 is in the first direction (e.g. Figure 7 Conductive sheets 132 are fixedly connected to both sides of the main body 131 in the X direction. By electrically connecting conductive sheets 132 to at least one side of the main body 131, the area of ​​the reference ground 130 can be further increased, the equivalent capacitance between the finger and the sensing electrode RX can be further increased, and the detection sensitivity can be further improved.

[0139] The conductive sheet 132 can be a metallic conductive sheet or a non-metallic conductive sheet, that is, the conductive sheet 132 is made of a conductive material.

[0140] The conductive sheet 132 can be fixedly connected to the main body 131 by means of welding, snap-fitting, etc.

[0141] The specific structure of the conductive sheet 132 is not limited here. For example... Figure 7 As shown, the conductive sheet 132 can be an arc-shaped sheet structure. Of course, the conductive sheet 132 can also be other structures, such as a flat plate structure.

[0142] In some embodiments, the conductive sheet 132 can be electrically connected to the power ground of the motherboard. The conductive sheet 132 can be connected to the power ground of the motherboard via structures such as metal traces, spring contacts, or conductive sheets.

[0143] Figure 8 This is a cross-sectional schematic diagram of the fourth touch device 100 provided in the embodiments of this application.

[0144] In some possible implementations, such as Figure 8 As shown, the touch device 100 also includes a housing 160, which has a grip portion 161, which can be understood as the part held by the user when operating the touch device 100. Figure 8As shown, there are two gripping parts 161, which are spaced apart along a first direction. A conductive sheet 132 is provided on the inner side of the gripping part 161. At this time, the conductive sheet 132 may or may not be in contact with the inner wall of the gripping part 161.

[0145] It should be noted that the inner side of the grip 161 refers to the side of the grip 161 facing the inside of the outer casing 160.

[0146] The specific structure of the outer casing 160 is not limited here. For example, as shown... Figure 8 As shown, the housing 160 may include a cover plate 200 and a rear cover 700, which together form a cavity for accommodating the reference ground 130, the sensing electrode array 110 and the excitation electrode layer 120.

[0147] Of course, the 160 casing, in addition to being able to... Figure 8 In addition to the cover plate 200 and the rear cover 700 shown, other structures can also be used. For example, the outer shell 160 includes the cover plate 200, the rear cover 700 and the frame member. The cover plate 200 and the rear cover 700 are respectively disposed on opposite sides of the frame member and are respectively fixedly connected to the frame member.

[0148] Figure 9 This is a top view schematic diagram of the fifth type of touch device 100 provided in the embodiments of this application. Figure 10 for Figure 9 A schematic diagram of the architecture of the touch device 100 shown.

[0149] In some possible implementations, such as Figure 9 , Figure 10 As shown, the touch device 100 also includes a shielding electrode layer 140, which is disposed at the outer edge of the sensing electrode array 110 and spaced apart from the sensing electrode array 110. The shielding electrode layer 140 and the sensing electrode array 110 do not overlap in their orthographic projections on the projection plane. The shielding electrode layer 140 is electrically connected to the excitation electrode layer 120.

[0150] By providing a shielding electrode layer 140 at the edge of the sensing electrode array 110, spaced apart from the sensing electrode array 110, and electrically connected to the excitation electrode layer 120, the shielding electrode layer 140 can shield the sensing electrodes RX located at the edge of the sensing electrode array 110, reducing the impact of edge noise on the sensing electrodes RX located at the edge of the sensing electrode array 110, thus reducing the interference on the sensing electrodes RX located at the edge of the sensing electrode array 110 and improving the sensitivity of the sensing electrodes RX located at the edge of the sensing electrode array 110.

[0151] In this embodiment, the front surface of each component of the touch device 10 is defined as the surface of each component closer to the finger along a third direction when the user touches the touch device 10 with their finger. The bottom surface of each component of the touch device 10 is defined as the surface of each component away from the finger along a third direction when the user touches the touch device 10 with their finger.

[0152] See also some possible implementations. Figure 10 In the direction from the excitation electrode layer 120 to the sensing electrode array 110, the front surface of the shielding electrode layer 140 is higher than the bottom surface of the sensing electrode array 110, and the bottom surface of the shielding electrode layer 140 is lower than the first plane 170, which is a plane 1 mm higher than the top surface of the sensing electrode array 110. This arrangement ensures that the shielding electrode layer 140 can effectively shield the sensing electrodes RX located at the edges of the sensing electrode array 110.

[0153] The relationship between the front and bottom surfaces of the sensing electrode array 110 and the top and bottom surfaces of the shielding electrode layer 140 can also be understood as follows: See Figure 10 Along the thickness direction of the excitation electrode layer 120 (e.g. Figure 10 (in the Z direction), the bottom surface of the sensing electrode array 110 is located between the front surface of the shielding electrode layer 140 and the front surface of the excitation electrode layer 120. The distance between the bottom surface of the shielding electrode layer 140 and the top surface of the excitation electrode layer 120 is less than or equal to H, where H is the distance between the first plane 170 and the front surface of the excitation electrode layer 120.

[0154] It should be noted that when the shielding electrode layer 140 is formed by a conductive layer on the circuit board 300, the shielding electrode layer 140 can be formed by at least one conductive layer, for example... Figure 10 As shown, the shielding electrode layer 140 is formed by a conductive layer on the circuit board component 300. Alternatively, the shielding electrode layer 140 and the sensing electrode RX layer can be formed by the same conductive layer, or the shielding electrode layer 140 and the sensing electrode RX layer can be formed by different conductive layers, or a portion of the shielding electrode layer 140 and the sensing electrode RX layer can be formed by the same conductive layer.

[0155] In some embodiments, the shielding electrode layer 140 can be electrically connected to the excitation electrode layer 120 via wires, metallized vias, or the like.

[0156] In some embodiments, such as Figure 10 As shown, the orthographic projections of the shielding electrode layer 140 and the excitation electrode layer 120 on the projection plane may not coincide. Alternatively, in some embodiments, the orthographic projections of the shielding electrode layer 140 and the excitation electrode layer 120 on the projection plane may partially coincide.

[0157] In some possible implementations, along a direction perpendicular to a third direction (e.g.) Figure 10 (in the X direction), the distance between the orthographic projections of the shielding electrode layer 140 and the sensing electrode array 110 on the projection plane (e.g., in the X direction), Figure 10 The width of the shielding electrode layer 140 (as shown in L1) is greater than zero and less than or equal to 1 mm. Figure 10 The thickness (as shown in L2) is greater than or equal to 1 mm. This setting ensures that the shielding electrode layer 140 can play a shielding role, thereby reducing the interference experienced by the individual sensing electrodes RX located at the edge of the sensing electrode array 110.

[0158] See also some possible implementations. Figure 9 The orthographic projection of the shielding electrode layer 140 onto the projection plane is annular, and the orthographic projection of the shielding electrode layer 140 onto the projection plane surrounds the orthographic projection of the sensing electrode array 110 onto the projection plane. Therefore, the shielding electrode layer 140 is a closed annular structure, which can reduce interference to the sensing electrodes RX located at the edges of the sensing electrode array 110 and improve the sensitivity of the sensing electrodes RX located at the edges of the sensing electrode array 110.

[0159] Figure 11 This is a top view of the sixth type of touch device 100 provided in the embodiments of this application.

[0160] Of course, besides being a complete ring structure, the shielding electrode layer 140 can also be implemented in some other ways, see [link to relevant documentation]. Figure 11 The shielding electrode layer 140 includes multiple shielding electrodes 141, each of which is electrically connected to the excitation electrode layer 120. Adjacent shielding electrodes 141 are spaced apart. This spacing between adjacent shielding electrodes 141 creates a gap, making the shielding electrode layer 140 a split structure. Furthermore, the gap between adjacent shielding electrodes 141 can be used for structural components such as clips to pass through, facilitating manufacturing requirements.

[0161] The spacing between adjacent shielding electrodes 141 can be understood as follows: on the projection plane, the orthographic projections of adjacent shielding electrodes 141 may partially overlap, or they may not overlap. Furthermore, when the orthographic projections of adjacent shielding electrodes 141 partially overlap on the projection plane, a gap exists between the adjacent shielding electrodes 141 in the thickness direction of the excitation electrode layer 120.

[0162] When the orthographic projections of two adjacent shielding electrodes 141 on the projection plane do not overlap, the smaller the gap between the two adjacent shielding electrodes 141, the less interference the sensing electrode RX receives, the less edge noise the sensing electrode RX receives, and the better the shielding effect.

[0163] In some embodiments, the gap width between two adjacent shielding electrodes 141 can be greater than 0 and less than or equal to 0.2 mm, which can reduce the interference received by the edge sensing electrode array 110 while meeting manufacturing, connection and other requirements.

[0164] In some embodiments, such as Figure 11 As shown, the shielding electrode layer 140, which consists of multiple shielding electrodes 141, is an unclosed annular structure.

[0165] In addition to having multiple shielding electrodes 141, in some scenarios, the number of shielding electrodes 141 can also be one. In this case, the shielding electrode 141 has a non-ring structure.

[0166] When the shielding electrode layer 140 is formed by multiple shielding electrodes 141, such as Figure 11 As shown, shielding electrodes 141 are provided at each edge of the sensing electrode array 110. Of course, in some embodiments, shielding electrodes 141 may also be provided at some edges of the sensing electrode array 110, for example, shielding electrodes 141 may be provided at one or both edges of the sensing electrode array 110.

[0167] In some embodiments, such as Figure 10 As shown, the shielding electrode layer 140 is in a third direction (e.g., Figure 10 The thickness in the Z-direction can be the same as the thickness of the sensing electrode RX in the third direction (e.g., Figure 10 (As shown).

[0168] Figure 12 This is a cross-sectional schematic diagram of the seventh touch device 100 provided in the embodiments of this application.

[0169] In other embodiments, such as Figure 12 As shown, the shielding electrode layer 140 is in a third direction (e.g., Figure 12 The thickness in the Z direction can be different from the thickness of the sensing electrode RX in the third direction.

[0170] In some embodiments, such as Figure 10 As shown, the spacing between the front surface of the excitation electrode layer 120 and the bottom surface of the shielding electrode layer 140 and the bottom surface of the sensing electrode RX can be the same.

[0171] Figure 13 This is a cross-sectional schematic diagram of the eighth touch device 100 provided in the embodiments of this application. Figure 14 This is a cross-sectional schematic diagram of the ninth type of touch device 100 provided in the embodiments of this application.

[0172] In some embodiments, the spacing between the front surface of the excitation electrode layer 120 and the bottom surface of the shielding electrode layer 140 and the bottom surface of the sensing electrode RX may also be different. For example, Figure 13 As shown, the distance between the front surface of the excitation electrode layer 120 and the bottom surface of the shielding electrode layer 140 can be greater than the distance between the front surface of the excitation electrode layer 120 and the bottom surface of the sensing electrode RX, or, as... Figure 14 As shown, the distance between the front surface of the excitation electrode layer 120 and the bottom surface of the shielding electrode layer 140 can be smaller than the distance between the front surface of the excitation electrode layer 120 and the bottom surface of the sensing electrode RX.

[0173] In some embodiments, such as Figure 10 As shown, the spacing between the front side of the excitation electrode layer 120, the front side of the shielding electrode layer 140, and the front side of the sensing electrode RX can be the same.

[0174] In some embodiments, the spacing between the front surface of the excitation electrode layer 120, the front surface of the shielding electrode layer 140, and the front surface of the sensing electrode RX may also be different. For example, Figure 12 or Figure 13 As shown, the distance between the front surface of the excitation electrode layer 120 and the front surface of the shielding electrode layer 140 can be greater than the distance between the front surface of the excitation electrode layer 120 and the front surface of the sensing electrode RX, or, as... Figure 14 As shown, the distance between the front side of the excitation electrode layer 120 and the front side of the shielding electrode layer 140 can be smaller than the distance between the front side of the excitation electrode layer 120 and the front side of the sensing electrode RX.

[0175] It should be noted that when the distance between the front surface of the excitation electrode layer 120 and the bottom surface of the shielding electrode layer 140 is less than the distance between the front surface of the excitation electrode layer 120 and the bottom surface of the sensing electrode RX, the distance between the front surface of the excitation electrode layer 120 and the front surface of the shielding electrode layer 140 can be less than the distance between the front surface of the excitation electrode layer 120 and the front surface of the sensing electrode RX, or the distance between the front surface of the excitation electrode layer 120 and the front surface of the shielding electrode layer 140 can be greater than the distance between the front surface of the excitation electrode layer 120 and the front surface of the sensing electrode RX (e.g., Figure 15 (As shown). Among them, Figure 15 This is a cross-sectional schematic diagram of the tenth touch device 100 provided in the embodiments of this application.

[0176] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances. The terms "first," "second," "third," "fourth," etc. (if present) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0177] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them. Although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A touch device (100), characterized in that, include: Reference location (130); The sensing electrode array (110) includes multiple sensing electrodes (RX). An excitation electrode layer (120) is disposed between the sensing electrode (RX) and the reference ground (130). The excitation electrode layer (120) includes at least one excitation electrode (TX), each of the at least one excitation electrode (TX) corresponding to at least one of the sensing electrodes (RX) on which an orthographic projection can be formed. On the projection plane, the orthographic projection of each excitation electrode (TX) and the orthographic projection of the sensing electrode (RX) corresponding to it at least partially overlap. On the projection plane, the area of ​​the portion where the orthographic projection of each excitation electrode (TX) and the orthographic projection of at least one corresponding induction electrode (RX) overlaps is greater than fifty percent of the area of ​​the orthographic projection of the corresponding induction electrode (RX); wherein the projection plane is a plane perpendicular to the thickness direction of the excitation electrode layer (120).

2. The touch device (100) according to claim 1, characterized in that, The excitation electrode layer (120) is formed by one of the excitation electrodes (TX).

3. The touch device (100) according to claim 1, characterized in that, The excitation electrode layer (120) includes a plurality of excitation electrodes (TX), and on the projection plane, any two excitation electrodes (TX) are arranged with orthographic projections spaced apart, and each excitation electrode (TX) corresponds to at least one induction electrode (RX) that can form an orthographic projection thereon.

4. The touch device (100) according to claim 1, characterized in that, Any two of the sensing electrodes (RX) are positioned at an orthographic projection interval on the projection plane.

5. The touch device (100) according to claim 1, characterized in that, The touch device (100) further includes a shielding electrode layer (140), which is disposed at the outer edge of the sensing electrode array (110) and spaced apart from the sensing electrode array (110). The shielding electrode layer (140) and the sensing electrode array (110) do not coincide on the orthographic projection of the shielding electrode layer (140) on the projection plane. The shielding electrode layer (140) is electrically connected to the excitation electrode layer (120).

6. The touch device (100) according to claim 5, characterized in that, In the direction from the excitation electrode layer (120) to the sensing electrode array (110), the front surface of the shielding electrode layer (140) is higher than the bottom surface of the sensing electrode array (110), and the bottom surface of the shielding electrode layer (140) is lower than the first plane (170), which is a plane 1 mm higher than the top surface of the sensing electrode array (110).

7. The touch device (100) according to claim 5, characterized in that, The shape of the orthographic projection of the shielding electrode layer (140) on the projection plane is an annular shape, and the orthographic projection of the shielding electrode layer (140) on the projection plane surrounds the orthographic projection of the sensing electrode array (110) on the projection plane.

8. The touch device (100) according to claim 5, characterized in that, The shielding electrode layer (140) includes a plurality of shielding electrodes (141), each shielding electrode (141) being electrically connected to the excitation electrode layer (120), and adjacent shielding electrodes (141) being spaced apart.

9. The touch device (100) according to claim 5, characterized in that, The distance between the shielding electrode layer (140) and the induction electrode array (110) on the projection plane is greater than zero and less than or equal to 1 mm, and the width of the shielding electrode layer (140) is greater than or equal to 1 mm.

10. The touch device (100) according to any one of claims 1-9, characterized in that, On the projection plane, the area of ​​the orthographic projection of the excitation electrode layer (120) is less than fifty percent of the area of ​​the orthographic projection of the reference ground (130).

11. The touch device (100) according to any one of claims 1-9, characterized in that, The reference ground (130) includes a body (131), and the excitation electrode layer (120) is located between the body (131) and the sensing electrode (RX).

12. The touch device (100) according to claim 11, characterized in that, The reference ground (130) also includes at least one conductive sheet (132), and at least one side of the body (131) is electrically connected to the conductive sheet (132).

13. The touch device (100) according to claim 12, characterized in that, The conductive sheet (132) can be a metallic conductive sheet or a non-metallic conductive sheet.

14. The touch device (100) according to claim 12, characterized in that, The touch device (100) also includes a housing (160) having a grip portion (161) and the conductive sheet (132) disposed on the inner side of the grip portion (161).

15. The touch device (100) according to claim 11, characterized in that, The main body (131) is a middle frame.

16. The touch device (100) according to any one of claims 1-9, characterized in that, The distance between the excitation electrode layer (120) and the sensing electrode (RX) is greater than zero, and the distance between the excitation electrode layer (120) and the sensing electrode (RX) is less than or equal to 1 mm.

17. The touch device (100) according to any one of claims 1-9, characterized in that, The distance between the excitation electrode layer (120) and the reference ground (130) is greater than or equal to 0.01 mm, and the distance between the excitation electrode layer (120) and the reference ground (130) is less than or equal to 10 mm.

18. A touch device (10), characterized in that, Includes the touch device (100) as described in any one of claims 1-17.

19. The touch device (10) according to claim 18, characterized in that, The touch device (10) is a touchpad.

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