Pressure sensitive finger cuff and method of operation

Abstract

The application discloses a pressure sensing finger sleeve and belongs to the technical field of communication. The pressure sensing finger sleeve comprises a finger sleeve body, a flexible antenna and a pressure sensing module. One end of the finger sleeve body is provided with an opening. The flexible antenna and the pressure sensing module are arranged on opposite sides of the finger sleeve body respectively. The flexible antenna comprises an antenna main body and a feed gradient assembly. The feed gradient assembly is connected with the antenna main body. The antenna main body is located at one end of the finger sleeve body away from the opening. The feed gradient assembly is located at one end of the finger sleeve body close to the opening. After sensing a user pressing signal, the pressure sensing module transmits the pressing signal through the flexible antenna.

Description

Technical Field

[0001] This application belongs to the field of communication technology, specifically relating to a pressure-sensitive finger sleeve and its operating method. Background Technology

[0002] With the rapid development of terminal technology, pressure-sensitive button modules have been proposed. Currently, there are technologies that combine pressure-sensitive buttons with screens, such as... Figure 1 As shown, by attaching the pressure-sensitive module 11 to the underside of the screen of the terminal 10, an under-screen pressure sensing function based on the piezoresistive effect is achieved. However, in this solution, the pressure-sensitive module needs to be placed inside the terminal body, which occupies terminal space and prevents the terminal from being made thin and light. Summary of the Invention

[0003] The purpose of this application is to provide a pressure-sensitive finger sleeve that can solve the problem that existing under-display pressure-sensitive solutions occupy terminal space, making it impossible for terminals to be thin and light.

[0004] In a first aspect, embodiments of this application provide a pressure-sensitive finger sleeve, including: a finger sleeve body, a flexible antenna, and a pressure-sensitive module;

[0005] An opening is provided at one end of the finger sleeve body. The flexible antenna and the pressure-sensitive module are respectively disposed on opposite sides of the finger sleeve body. The flexible antenna includes an antenna body and a feed gradient assembly. The feed gradient assembly is connected to the antenna body. The antenna body is located at the end of the finger sleeve body away from the opening, and the feed gradient assembly is located at the end of the finger sleeve body close to the opening.

[0006] The pressure-sensitive module transmits the pressure signal through the flexible antenna after sensing the user's press signal.

[0007] Secondly, embodiments of this application provide an operating method, including:

[0008] The pressure-sensitive finger sleeve detects the user's pressing signal, wherein the pressure-sensitive finger sleeve establishes a pairing connection with the terminal device, and the pressure-sensitive finger sleeve is the pressure-sensitive finger sleeve as described in the first aspect;

[0009] Upon detecting a user's pressure signal, the pressure signal is transmitted through the flexible antenna of the pressure-sensitive finger sleeve, so that the terminal device receives the pressure signal through the antenna and responds to the pressure signal.

[0010] Thirdly, embodiments of this application provide another operating method, including:

[0011] The terminal device receives the pressing signal emitted by the pressure-sensitive finger sleeve through an antenna and obtains the pressing position information of the pressing signal. The terminal device establishes a pairing connection with the pressure-sensitive finger sleeve, which is the pressure-sensitive finger sleeve as described in the first aspect.

[0012] The system responds to the pressing signal based on the pressing position information.

[0013] In this embodiment, a pressure-sensitive finger sleeve integrating a pressure-sensitive module and a flexible antenna is designed, allowing users to perform pressure-sensitive operations on the terminal device by wearing the finger sleeve. The finger sleeve can sense the user's pressing signal through the pressure-sensitive module and transmit the pressing signal through the flexible antenna, so that the terminal device can receive and respond to the user's pressing signal through the antenna. Thus, since there is no need to place the pressure-sensitive module inside the terminal device, the terminal device can be designed to be thinner and lighter. Attached Figure Description

[0014] Figure 1 This is an under-display pressure-sensitive design scheme in the related technologies provided in the embodiments of this application;

[0015] Figure 2 This is one of the structural schematic diagrams of the pressure-sensitive finger sleeve provided in the embodiments of this application;

[0016] Figure 3a This is a schematic diagram of the antenna structure during simulation provided in the embodiments of this application;

[0017] Figure 3b This is a schematic diagram illustrating a user operating the device while wearing pressure-sensitive finger cots, as provided in an embodiment of this application.

[0018] Figure 4 This is a second schematic diagram of the structure of the pressure-sensitive finger sleeve provided in the embodiments of this application;

[0019] Figure 5 This is a schematic diagram of the signal interaction between the pressure-sensitive finger sleeve and the terminal device provided in the embodiments of this application;

[0020] Figure 6 This is a schematic diagram of the location where the pressure-sensitive module is placed in the pressure-sensitive finger sleeve provided in the embodiment of this application;

[0021] Figure 7 This is a schematic diagram of a pressure-sensitive module with a steel strip placed in a pressure-sensitive finger sleeve provided in an embodiment of this application;

[0022] Figure 8 This is one of the schematic diagrams of the pressure-sensitive unit provided in the embodiments of this application;

[0023] Figure 9 This is a schematic diagram of the deformation of the pressure-sensitive module provided in this application embodiment under pressure.

[0024] Figure 10 This is a schematic diagram of the pressure-sensitive module provided in this application outputting a differential voltage after being pressed and deformed;

[0025] Figure 11 This is a schematic diagram of the deformation model provided in the embodiments of this application;

[0026] Figure 12 This is a second schematic diagram of the pressure-sensitive unit provided in the embodiments of this application;

[0027] Figure 13 This is a schematic diagram of a pressure-sensitive module consisting of radial and tangential thin-film piezoresistive elements placed in a pressure-sensitive finger sleeve according to an embodiment of this application;

[0028] Figure 14 This is a schematic diagram of the deformation of the thin-film capacitor provided in the embodiments of this application under pressure.

[0029] Figure 15 This is a schematic diagram of a pressure-sensitive unit with a reference capacitor provided in an embodiment of this application;

[0030] Figure 16 This is a schematic diagram of a pressure-sensitive module composed of thin-film capacitors placed in a pressure-sensitive finger sleeve provided in an embodiment of this application;

[0031] Figure 17 This is a flowchart of the operation method of the pressure-sensitive finger sleeve provided in the embodiments of this application;

[0032] Figure 18 This is a flowchart of the operation method of the terminal device provided in the embodiments of this application. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0034] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0035] The pressure-sensitive finger sleeve provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0036] Please see Figure 2 , Figure 2 This is a schematic diagram of the structure of the pressure-sensitive finger sleeve provided in the embodiments of this application, as shown below. Figure 2 As shown, the pressure-sensitive finger sleeve 20 includes a finger sleeve body 21, a flexible antenna 22, and a pressure-sensitive module 23;

[0037] One end of the finger sleeve body 21 is provided with an opening. The flexible antenna 22 and the pressure-sensitive module 23 are respectively provided on opposite sides of the finger sleeve body 21. The flexible antenna 22 includes an antenna body 221 and a feed gradient component 222. The feed gradient component 222 is connected to the antenna body 221. The antenna body 221 is located at the end of the finger sleeve body 21 away from the opening, and the feed gradient component 222 is located at the end of the finger sleeve body 21 close to the opening.

[0038] The pressure-sensitive module 23 transmits the pressure signal through the flexible antenna 22 after sensing the user's press signal.

[0039] In the embodiments of this application, such as Figure 2 As shown, the pressure-sensitive finger sleeve 20 includes a finger sleeve body 21, one end of which has an opening. The shape of the finger sleeve body 21 can match the user's finger, allowing the user to wear the pressure-sensitive finger sleeve 20 through the opening. The pressure-sensitive finger sleeve 20 also includes a flexible antenna 22 and a pressure-sensitive module 23. The flexible antenna 22 can be disposed on the upper surface of the finger sleeve body 21, i.e., the back of the finger, for transmitting signals. The flexible antenna 22 can adopt a conformal structure design to the finger, so that it can fit well with the finger after being worn, which can effectively improve the comfort of the product. The pressure-sensitive module 23 can be disposed on the lower surface of the finger sleeve body 21, i.e., the fingertip, for sensing the user's pressing signal.

[0040] The flexible antenna 22 can be a symmetrical wiring structure. The flexible antenna 22 includes an antenna body 221 and a power feeding gradient component 222. The power feeding gradient component 222 is connected to the antenna body 221. The antenna body 221 can be located at the fingertip part of the finger sleeve body 21, that is, at the end of the finger sleeve body 21 away from the opening. The power feeding gradient component 222 is located at the end of the finger sleeve body 21 close to the opening, and is used to complete impedance transformation.

[0041] In this way, the pressure-sensitive module 23 is used to sense the user's pressing signal, and after sensing the user's pressing signal, it can transmit the pressing signal through the flexible antenna 22. The terminal device that matches the pressure-sensitive finger sleeve 20 can receive the pressing signal through the antenna, and respond after parsing the pressing signal. Thus, the user can complete the pressure-sensitive operation of the terminal device through the pressure-sensitive finger sleeve 20.

[0042] In this embodiment, the flexible antenna 22 can be a low-profile flexible conformal folded array antenna with a loaded parallel metal strip, such as... Figure 2 The flexible antenna 22 shown can operate in the 3GHz band, allowing terminal devices to reuse the four-way Multiple Input Multiple Output (MIMO) of their N78 band antenna as receiving antennas, greatly increasing the fault tolerance of signal transmission. Furthermore, due to the low latency advantage of high-frequency carrier signal transmission, the responsiveness of user operation can be effectively improved. In addition, the flexible antenna 22 adopts a conformal design to the shape of the finger, saving space occupied by the pressure-sensitive finger sleeve 20.

[0043] In this embodiment, the impedance of the feed gradient component 222 can range from 110Ω to 140Ω. The feed port of the flexible antenna 22 can be fed using an edge-coupled coated microstrip with an impedance of 125Ω, maximizing the antenna gain in the main planned direction. Furthermore, the impedance transformation is insensitive when the feed port line spacing changes, thus significantly reducing the difficulty of antenna wiring.

[0044] like Figure 3a As shown, the flexible antenna 22 can use a 0.05mm thick flexible printed circuit board (FPC) 301 material as the substrate. In the simulation experiment of the flexible antenna 22, the flexible antenna 22 is placed on a metal plane with a human hand Debye model 302 underneath. After the user wears the pressure-sensitive finger sleeve 20, the flexible antenna 22 is located on the back of the finger.

[0045] In this embodiment, the normal direction of the radiation direction of the flexible antenna 22 is the -X direction, which is also the direction the finger points, such as... Figure 3bAs shown, when the user makes various movements, the flexible antenna 22 is mostly positioned with the left finger sleeve 201 facing the lower antenna 203 of the terminal device 30, and the right finger sleeve 202 facing the upper antenna 204. Therefore, the direction of maximum antenna gain of the right finger sleeve 202 is directly opposite the N78 band antenna of the terminal device 30, and there is no situation where the antenna of the terminal device 30 falls into the dead zone of the finger sleeve antenna. Although the antenna of the left finger sleeve 201 is not directly facing the four antennas of the N78 band, it is very close to the four antennas of the N78 band, resulting in low path loss. At the same time, due to the wide radiation bandwidth of the finger sleeve antenna, the probability that all four antennas of the N78 band of the terminal device 30 will fall into the dead zone of the finger sleeve antenna is very small. Therefore, this design will not result in the risk of no feedback when the user presses the finger sleeve.

[0046] In the main polarization direction of the flexible antenna 22, the gain is -10dB, and the antenna gain of the flexible antenna 22 is not less than -20dB over a wide angle. Therefore, after inputting a signal of 0dBm (i.e., 1mW), the output is still -10dBm to -20dBm. Assuming that the signal strength attenuates by 50dBm even in complex environments, the signal strength that the terminal device can receive is still -60dBm to -70dBm. This value still exceeds the sensitivity of the N78 band antenna operating at 3GHz, which is -87dBm to -84dBm. In other words, this signal strength can guarantee the user's experience during operation.

[0047] Optionally, the feed gradient assembly 222 extends from the middle of the antenna body 221 to both sides of the finger sleeve body 21.

[0048] In one embodiment, one end of the power feeding gradient component 222 can be connected to the middle of the antenna body 221, and the other end of the power feeding gradient component 222 extends to both sides of the finger sleeve body 21 and is laid out along both sides of the finger sleeve body 21 to maximize the utilization of the corner area of ​​the finger sleeve body 21, while the middle part is left for laying out the pressure-sensitive module.

[0049] Optionally, such as Figure 4 As shown, the flexible antenna 22 also includes an impedance matching component 223, which is disposed at the end of the finger sleeve body 21 away from the opening.

[0050] That is, Figure 4 As shown, the flexible antenna 22 may also include an impedance matching component 223 for achieving antenna impedance matching, resulting in a lower in-band VSWR. Specifically, the length and width of the impedance matching component 223 can be adjusted to achieve a good match between the flexible antenna 22 and the 377Ω free space impedance. The impedance matching component 223 can be located at the very front of the finger sleeve body 21, that is, on the front side of the antenna body 221. There can be two impedance matching components 223, located on the left and right sides of the finger sleeve body 21, respectively.

[0051] Optionally, such as Figure 4 As shown, the flexible antenna 22 also includes a lower director 224, which is disposed on the side of the finger sleeve body 21 opposite to the antenna body 221.

[0052] In one embodiment, the flexible antenna 22 further includes a lower director 224, which is disposed on the side opposite to the antenna body 221 of the finger sleeve body 21. That is, the lower director 224 and the antenna body 221 are located on different sides, which is used to change the radiation direction of the flexible antenna 22, so that the maximum radiation direction of the flexible antenna 22 changes from the original upward radiation to oblique upward radiation, so as to meet the posture of the user when operating the terminal device. The wide beamwidth of the single antenna pattern also has certain advantages for the user experience. After the shape change, the flexible antenna 22 still maintains good radiation efficiency.

[0053] It should be noted that the above-mentioned scheme without the impedance matching component 223 and the lower-level director 224 uses a point-frequency antenna system as the transmission scheme, which has poor overall robustness of the wireless terminal. Therefore, the flexible antenna 20 can be deeply optimized by adding the impedance matching component 223 and the lower-level director 224. While meeting the data transmission requirements, broadband performance is also achieved. In the optimized scheme, the flexible antenna 20 can operate in the 1.5GHz to 3GHz frequency band. Its wide bandwidth allows the pressure-sensitive finger sleeve 20 to reuse all the antennas of the terminal device except for the low-frequency ones. Since the current terminal device combines the mid- and low-frequency antennas into one, all the antennas of the terminal device can be utilized by the pressure-sensitive finger sleeve 20.

[0054] Optionally, such as Figure 4 As shown, the antenna body 221 includes a horizontally arranged metal strip 2211 and a rectangular frame 2212, with short-circuit strips 225 arranged on both sides of the rectangular frame 2212.

[0055] like Figure 2 and Figure 4 As shown, the antenna body 221 may include a horizontally arranged metal strip 2211 and a rectangular frame 2212. To remove low-frequency deteriorating resonant points out of band and achieve good performance without singularities within the band, it can be configured as follows: Figure 4 As shown, a short-circuit strip 225 is added to each side of the rectangular frame 2212.

[0056] And in such Figure 4In the scheme shown, which includes impedance matching component 223, lower director 224 and short-circuit strip 225, the feed port of flexible antenna 22 can be fed by edge-coupled coated microstrip with an impedance of 100Ω. This strip has the characteristic of being insensitive to impedance changes with distance, which is very advantageous for the arrangement of other modules.

[0057] like Figure 4 In the embodiment shown, the flexible antenna 22 can operate in the 1.5GHz to 3GHz frequency band. Its wide frequency band allows the pressure-sensitive finger sleeve 20 to reuse all the antennas of the terminal device except for the low frequency. Since the mid-to-low frequency band antennas of the current terminal device are combined into one, all the antennas of the terminal device can be utilized by the antenna of the pressure-sensitive finger sleeve 20.

[0058] In this embodiment, the impedance of the feed gradient component 222 can range from 85Ω to 115Ω. The feed port can be fed using an Edge-Coupled Coated Microstrip with an impedance of 100Ω, maximizing the gain of the flexible antenna 22 in the main polarization direction. Furthermore, the impedance transformation is insensitive when the feed port line spacing changes, thus significantly reducing the difficulty of antenna wiring.

[0059] Optionally, the power supply gradient component 222 employs a balun device.

[0060] In one embodiment, the feed gradient component 222 can be implemented using a balun device, which is a bidirectional balanced-to-unbalanced converter that can convert an unbalanced transmission line into a balanced load, so that the antenna pattern becomes symmetrical.

[0061] Optionally, the antenna body 221 and the feed gradient assembly 222 are both symmetrically arranged on the finger sleeve body 21.

[0062] In one embodiment, the antenna body 221, namely the metal strip 2211, the rectangular frame 2212, and the feed gradient component 222 can all be arranged axially symmetrically with respect to the finger sleeve body 21. That is, the flexible antenna 22 can be arranged axially symmetrically on the surface of the finger sleeve body 21. This ensures that the flexible antenna 22 is evenly distributed on the finger sleeve body 21, which not only facilitates layout and wiring but also ensures that the antenna signal radiation is basically consistent in the symmetrical direction, making it convenient for the user to operate when wearing the finger sleeve.

[0063] Figure 4 In the illustrated scheme, the maximum radiation direction of the flexible antenna 22, which is approximately 70 degrees from the horizontal plane of the antenna (i.e., the direction in which the finger points diagonally upwards), shows a 3dB increase in gain at 90 degrees (the direction the finger is pointing) compared to the antenna pattern without the lower director 224. Figure 3bAs shown, when the user performs various actions, the flexible antenna 22 is mostly positioned with the left finger sleeve 201 facing the lower antenna of the terminal device 30 and the right finger sleeve 202 facing the upper antenna. Since the flexible antenna 22 in this scheme covers all mid-to-high frequency bands, the carrier aggregation (CA) technology can be used to achieve coverage without scanning blind spots.

[0064] When the flexible antenna 22 operates in the N78 band, the terminal device does not have a lower antenna. Although the antenna of the left finger sleeve 202 is not directly facing the four antennas of the N78 band, it is very close to the four antennas of the N78 band, resulting in low path loss. At the same time, the radiation bandwidth of the finger sleeve antenna is relatively wide. The probability that all four antennas of the terminal device 30 in the N78 band will fall into the dead zone of the finger sleeve antenna is very small. Therefore, this design will not result in the risk of no feedback when the user presses the finger sleeve.

[0065] In the main polarization direction of the flexible antenna 22, the gain is -12dB, and the antenna gain of the flexible antenna 22 is not less than -25dB within the angular range of -100° to +90°. Therefore, after inputting a 0dBm (i.e., 1mW) signal, the output still has a gain of -12dBm to -25dBm. Assuming that the signal strength attenuates by 50dBm even in complex environments, the signal strength that the terminal device can receive is still -62dBm to -75dBm. This value still exceeds the sensitivity of the 100MHz bandwidth of the radio frequency band (-87dBm to -84dBm), meaning that this signal strength can guarantee the user's experience during operation.

[0066] In one application scenario, the pressure-sensitive finger sleeve 20 can not only operate in close proximity to the terminal device, but also at a distance of 3m to 4m. In open conditions with no complex obstructions between the terminal device and the flexible antenna 22 of the pressure-sensitive finger sleeve 20, such as when the terminal device is placed on a table and the operator is away from the table, the operator can operate the terminal device remotely using the pressure-sensitive finger sleeve 20, thus "unbinding" both hands from the terminal device and achieving a truly wireless operating experience. This greatly enhances the convenience of using the pressure-sensitive finger sleeve 20.

[0067] In addition, when the pressure-sensitive finger sleeve 20 is used, it can first perform a matching action with the terminal device. Specifically, after detecting that the user is wearing the pressure-sensitive finger sleeve 20, it can initiate a matching request to the terminal device. After receiving the matching request, the terminal device completes the matching process with the pressure-sensitive finger sleeve 20.

[0068] like Figure 5As shown, after the terminal device 30 is matched with the pressure-sensitive finger sleeve 20, the user needs to contact and grasp the screen TP coordinates through the pressure-sensitive finger sleeve 20 and transmit them to the terminal device 30 for pressing scheme selection. In addition, the pressure-sensitive module inside the pressure-sensitive finger sleeve 20 senses the pressing behavior by setting an analog signal threshold, and transmits the sensed analog signal to the internal ASCII circuit for amplification, and then transmits it to the flexible antenna for encoding before wirelessly transmitting it to the terminal device 30. The terminal device 30 receives the fixed code to represent the current detected pressing behavior, determines the pressing direction through the TP coordinates, and transmits the parsed pressing signal to the CPU for further processing to realize the under-screen pressure sensing function.

[0069] To minimize space usage, the space within the pressure-sensitive finger sleeve 20 needs to be utilized as efficiently as possible. The pressure-sensitive module 23 can be designed directly in the empty space behind the flexible antenna 22 on the finger sleeve body 21, i.e., the area where the finger contacts and presses. Simultaneously, it should be ensured that each press is directly above the deformation channel. Figure 6 As shown, the flexible antenna 22 is disposed on the back 211 of the finger sleeve body 21, and the pressure-sensitive module 23 is disposed on the abdomen 212 of the finger sleeve body 21, that is, the pressing part after the user's finger is worn. The pressure-sensitive module 23 can be selected to implement the pressure-sensitive function based on the piezoresistive effect.

[0070] Optionally, such as Figure 7 As shown, the pressure-sensitive module 23 includes N pressure-sensitive units 231, where N is an integer greater than 1;

[0071] like Figure 8 As shown, each pressure-sensitive unit 231 includes two supporting steel plates 2311 and four voltage transformers 2312. One end of each voltage transformer 2312 is connected to one of the two supporting steel plates 2311, and the other end of each voltage transformer 2312 is connected to the other of the two supporting steel plates 2311. Two voltage transformers 2312 are respectively arranged on opposite sides of the two supporting steel plates 2311, and the four voltage transformers 2312 form a Wheatstone bridge.

[0072] Among them, the voltage transformers 2312 respectively set on opposite sides of the two bearing steel sheets 2311 undergo different degrees of deformation under the user's pressing action, thereby outputting differential voltage.

[0073] In one implementation, the pressure-sensitive unit in the pressure-sensitive module 23 can be designed using a traditional double-horizontal steel sheet paired with a Wheatstone bridge, such as... Figure 8 As shown, each pressure-sensitive unit 231 carries a separate steel sheet, where R1 to R4 are all piezoresistive resistors. The pressure-sensitive unit 231 can be embedded into the center of the pressure-sensitive finger sleeve 20, as shown below. Figure 7 As shown, this design allows the pressure-sensitive finger sleeve 20 to have four pressure sensing channels inside, which can greatly improve the pressure detection sensitivity.

[0074] like Figure 9 As shown, when a press occurs, the pressure-sensitive unit 231 undergoes the changes described in the figure. It can be seen that the upper resistor is shortened relative to the lower resistor, and the lower resistor is lengthened relative to the upper resistor. Figure 10 As shown, the analog signal triggered by the deformation of the upper and lower resistors can be differentially output to obtain the pressure output signal.

[0075] It should be noted that, due to the natural curvature of the fingertips, the static module cannot be guaranteed to be perfectly flat each time the pressure-sensitive finger sleeve 20 is worn. Therefore, static calibration is required when the user wears the pressure-sensitive finger sleeve 20, and a threshold for the deformation simulation signal to report pressing behavior needs to be set. Through the above design, the overall pressure-sensitive function of the pressure-sensitive finger sleeve 20 can be guaranteed to be reliable and stable.

[0076] In this embodiment, the designed pressure-sensitive module 23 has the advantages of simple construction and low cost. It directly uses the relative deformation of the pressure transformers placed vertically to output pressure signals, and the overall detection logic is relatively simple and efficient.

[0077] Optionally, the pressure-sensitive module 23 includes N pressure-sensitive units 231, where N is an integer greater than 1;

[0078] Each pressure-sensitive unit 231 includes two radially arranged thin-film piezoresistors and two tangentially arranged thin-film piezoresistors, and the four thin-film resistors form a Wheatstone bridge.

[0079] Among them, the radially arranged thin-film piezoresistive and the tangentially arranged thin-film piezoresistive are deformed to different degrees under the user's pressing action, thereby outputting differential voltage.

[0080] Figure 7 While the pressure-sensitive module design shown is relatively simple overall, it still has some shortcomings. For example, the pressure detection is based on spatial compression in the z-direction, and the entire module needs to reserve space for the pressure range, thus limiting the overall module thickness. Furthermore, the presence of the steel sheet prevents the module from achieving its maximum weight. Therefore, in this embodiment, a module unit that can achieve differential output of the piezoresistive diaphragm without the need for a steel sheet can be designed based on the detection logic of a Wheatstone bridge to solve this problem. Figure 7 The disadvantages of the proposed solution.

[0081] In this embodiment, the structural concepts of radial flexion and extension and tangential flexion and extension can be introduced, such as... Figure 11 As shown, when a diaphragm of length *a* is subjected to a uniform pressure *q*, the magnitude of the diaphragm deformation can be expressed as: Where r is the radial radius of curvature, and D is the degree of bending of the steel sheet. Where E is energy, h is the thickness of the steel plate, and v is the pressing rate.

[0082] After the pressing action occurs, the pressure value F acting on the diaphragm surface is converted into pressure q, which is then transformed into the tangential and radial deformation values ​​of the circular surface: As shown in the above formula, there is a certain difference between the tangential deformation and the radial deformation, and this difference increases with the increase of the pressing pressure. Therefore, the strain resistors can be placed at the tangential and radial positions of the entire surface layer, respectively, and the strain threshold can be detected using a Wheatstone bridge. In this way, a new method without using steel sheets to bear the deformation has been found, namely the tangential and radial thin-film piezoresistive bonding scheme.

[0083] like Figure 12 As shown, varistor resistors can be printed tangentially and radially in a single pressure-sensitive channel, i.e., R1 and R2 are tangential thin-film piezoresistors, and R3 and R4 are radial thin-film piezoresistors. Figure 13 As shown, the stacked structure design of the entire pressure-sensitive module can be retained. The tangential and radial differential signals are output and then amplified accordingly to achieve pressure detection. Compared to... Figure 7 In the scheme shown, the piezoresistive detection of the upper and lower supporting steel plates results in a larger relative change in the length of the tangential radial surface strain resistance, and a greater amount of original analog signal, which in turn improves the single-channel sensitivity.

[0084] In this way, the solution can significantly reduce the space and weight occupied by the pressure-sensitive module while ensuring the sensitivity of the press.

[0085] Optionally, the pressure-sensitive module 23 includes N pressure-sensitive units 231, where N is an integer greater than 1;

[0086] Each pressure-sensitive unit 231 includes a thin-film capacitor and a fixed electrode plate;

[0087] The distance between the thin-film capacitor and the fixed electrode plate changes when the user presses the capacitor, resulting in a change in capacitance.

[0088] In this method, a capacitor film can be used. Figure 13 The proposed scheme has been optimized to map the change in capacitance to the magnitude of the pressing pressure. The capacitance detection mechanism works as follows: when the plates are fully charged with charge Q, there is a constant potential energy between the plates. In this case, the capacitance effect depends only on... That is, the capacitance between the plates is negatively correlated with the spacing D, and positively correlated with the area S of the overlapping projection region between the plates. Based on this characteristic, the deformation value of the spacing between the capacitor plates can be directly used to map the magnitude of the pressure.

[0089] The pressure sensing unit 231 with a single pressure-capacitance channel can be as follows Figure 14As shown, whenever the pressure-sensitive module channel is subjected to pressing stress, the lower fixed plate 2313 remains in a constant relative position, while the metal film 2314 above the module channel unit is pressed into the membrane cavity, thereby changing the relative distance D between the capacitor plates before and after, which means that the module capacitance changes, thus generating a variable voltage output.

[0090] Optionally, each pressure-sensitive unit 231 further includes a thin-film reference capacitor, the distance between the thin-film reference capacitor and the fixed electrode plate remains unchanged under the user's pressure, and the thin-film reference capacitor is used to determine the amount of capacitance change generated by the thin-film capacitor under the user's pressure.

[0091] That is to take into account Figure 14 In the illustrated scheme, a reference capacitor is missing for the static state when not pressed. When using a mechanism to detect pressure by detecting the slight deformation of the capacitor through a single channel, the degree of change in the inter-plate spacing varies with different pressing pressures. Without initial capacitance calibration, the overall module sensitivity cannot be guaranteed well, potentially leading to inconsistencies such as zero bias and uneven elastic recovery. Therefore, a reference capacitor can be added to this embodiment, such as... Figure 15 As shown, a fixed-distance reference capacitor 2315 with a constant gap D′ can be added next to the thin-film capacitor. Then, based on the change in the gap D between the thin-film capacitor 2314 and the fixed electrode 2313 before and after pressing, the change in capacitance before and after pressing can be deduced, and the magnitude of the pressure can be further determined. Specifically, the reference capacitor C′ can be used to detect the pressure magnitude. Where C is the capacitance value after pressing.

[0092] This solution eliminates the need for printed resistors in the pressure-sensitive module, saving on printing resistor costs and simplifying the reference traces for each channel. Therefore, this full-screen multilayer pressure-sensitive module design based on capacitance detection further simplifies wiring while maintaining sensitivity, achieving low-cost module design and space reduction. The pressure-sensitive module design structure of the pressure-sensitive finger sleeve in this solution can be as follows: Figure 16 As shown.

[0093] In this embodiment, a pressure-sensitive finger sleeve integrating a pressure-sensitive module and a flexible antenna is designed, allowing users to perform pressure-sensitive operations on the terminal device by wearing the finger sleeve. The finger sleeve can sense the user's pressing signal through the pressure-sensitive module and transmit the pressing signal through the flexible antenna, so that the terminal device can receive and respond to the user's pressing signal through the antenna. In this way, since there is no need to place the pressure-sensitive module in the terminal device, the terminal device can be designed to be thinner and lighter.

[0094] Please see Figure 17 , Figure 17 A flowchart of the operation method of the pressure-sensitive finger sleeve provided in the embodiments of this application is shown below. Figure 17As shown, the method includes the following steps:

[0095] Step 1701: The pressure-sensitive finger sleeve detects the user's pressing signal, wherein the pressure-sensitive finger sleeve establishes a pairing connection with the terminal device, and the pressure-sensitive finger sleeve is the pressure-sensitive finger sleeve described in the previous embodiment;

[0096] Step 1702: Upon detecting a user's pressure signal, the pressure signal is transmitted through the flexible antenna of the pressure-sensitive finger sleeve, so that the terminal device receives the pressure signal through the antenna and responds to the pressure signal.

[0097] When using the pressure-sensitive finger sleeve, it can first perform a pairing action with the terminal device. Specifically, after detecting that the user is wearing the pressure-sensitive finger sleeve, it can initiate a pairing request to the terminal device. After receiving the pairing request, the terminal device can complete the pairing process with the pressure-sensitive finger sleeve.

[0098] After pairing, the pressure-sensitive finger sleeve can detect the user's pressing signal in real time. Specifically, it can detect the pressing signal through its pressure-sensitive module. When the user's pressing signal is detected, it can transmit the detected pressing signal through its flexible antenna. Specifically, it can transmit the pressing signal at a specific frequency through the flexible antenna, so that the terminal device can receive the pressing signal through its antenna of the corresponding frequency. After receiving the pressing signal, the terminal device can analyze the pressing signal and obtain the pressing position information. Specifically, it can obtain the coordinate position of the pressure-sensitive finger sleeve mapped to the terminal screen, and then respond to the pressing signal according to the pressing position information, so as to realize the function of operating the terminal device through the pressure-sensitive finger sleeve.

[0099] Optionally, step 1701 includes:

[0100] The pressure-sensitive finger sleeve acquires the deformation of the pressure-sensitive module and determines whether the deformation is greater than a preset deformation threshold.

[0101] If the deformation is greater than the preset deformation threshold, it is determined that a user's pressing signal has been detected.

[0102] When detecting a user's pressure signal, the deformation of the pressure-sensitive module can be obtained and compared with a preset deformation threshold to determine whether the current deformation exceeds the preset deformation threshold. If it does, the user's pressure signal is detected; otherwise, the current slight pressure signal can be ignored, thus avoiding accidental operation.

[0103] In this embodiment, the pressure-sensitive finger sleeve detects the user's pressing signal and transmits the detected pressing signal through its flexible antenna, enabling the terminal device to receive the pressing signal through the antenna and respond to the pressing signal, thereby allowing the user to conveniently operate the terminal device through the pressure-sensitive finger sleeve.

[0104] Please see Figure 18 , Figure 18 A flowchart of the operation method on the terminal device side provided in the embodiments of this application is shown below. Figure 18 As shown, the method includes the following steps:

[0105] Step 1801: The terminal device receives the pressing signal emitted by the pressure-sensitive finger sleeve through the antenna and obtains the pressing position information of the pressing signal. The terminal device establishes a pairing connection with the pressure-sensitive finger sleeve, which is the pressure-sensitive finger sleeve described in the previous embodiment.

[0106] Step 1802: Respond to the pressing signal according to the pressing position information.

[0107] It should be noted that this embodiment is as a comparison with... Figure 17 The implementation method on the terminal device side corresponding to the illustrated embodiment can be found in the following examples. Figure 17 The relevant descriptions in the illustrated embodiments will not be repeated here to avoid repetition.

[0108] In this embodiment of the application, the terminal device receives the pressing signal emitted by the pressure-sensitive finger sleeve through the antenna and obtains the pressing position information, so that it can respond to the pressing signal according to the pressing position information. This enables the user to conveniently operate the terminal device by wearing the pressure-sensitive finger sleeve.

[0109] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A pressure sensing finger cuff, characterized by The pressure sensing finger sleeve comprises a finger sleeve body, a flexible antenna and a pressure sensing module; One end of the finger sleeve body is provided with an opening, the flexible antenna and the pressure sensing module are respectively arranged on opposite sides of the finger sleeve body, the flexible antenna comprises an antenna body and a feed taper assembly, the feed taper assembly is connected with the antenna body, the antenna body is located at one end of the finger sleeve body away from the opening, and the feed taper assembly is located at one end of the finger sleeve body close to the opening; The pressure sensing module transmits the pressing signal through the flexible antenna after sensing the pressing signal of the user. The antenna body comprises a metal strip arranged transversely and a rectangular frame, and short-circuit strips are arranged on the two sides of the rectangular frame respectively.

2. The pressure sensing finger cot of claim 1, wherein, The feed taper assembly extends from the middle of the antenna body to both sides of the finger sleeve body.

3. The pressure sensing finger cot of claim 1, wherein, The flexible antenna further comprises an impedance matching assembly arranged at one end of the finger sleeve body away from the opening.

4. The pressure sensing finger cot of claim 3, wherein, The flexible antenna further comprises a lower layer director arranged on the side of the finger sleeve body opposite to the antenna body.

5. The pressure sensing finger cot of claim 1, wherein, The feed taper assembly adopts a balun device.

6. The pressure sensing finger cot of claim 1, wherein, The antenna body and the feed taper assembly are symmetrically arranged on the finger sleeve body.

7. The pressure sensing finger cot of claim 1, wherein, The impedance of the feed taper assembly ranges from 110Ω to 140Ω or from 85Ω to 115Ω.

8. The pressure sensing finger cot of claim 1, wherein, The flexible antenna works in a frequency band of 1.5GHz-3GHz.

9. The pressure-sensitive finger cuff according to any one of claims 1 to 8, characterized in that The pressure sensing module comprises N pressure sensing units, and N is an integer greater than 1. Each pressure sensing unit comprises two bearing steel sheets and four pressure variable resistors, one end of each pressure variable resistor is connected to one of the two bearing steel sheets, the other end of each pressure variable resistor is connected to the other of the two bearing steel sheets, two pressure variable resistors are arranged on opposite sides of the two bearing steel sheets respectively, and the four pressure variable resistors form a Wheatstone bridge. The pressure variable resistors arranged on opposite sides of the two bearing steel sheets produce different degrees of deformation under the pressing of the user, thereby outputting a differential voltage.

10. The pressure-sensitive finger cuff according to any one of claims 1 to 8, characterized in that The pressure sensing module comprises N pressure sensing units, and N is an integer greater than 1. Each pressure sensing unit comprises two radially arranged thin film piezoresistors and two tangentially arranged thin film piezoresistors, and the four thin film piezoresistors form a Wheatstone bridge. The radially arranged thin film piezoresistors and the tangentially arranged thin film piezoresistors produce different degrees of deformation under the pressing of the user, thereby outputting a differential voltage.

11. The pressure-sensitive finger cuff according to any one of claims 1 to 8, characterized in that The pressure sensing module comprises N pressure sensing units, and N is an integer greater than 1. Each pressure sensing unit comprises a thin film capacitor and a fixed electrode plate. The spacing between the thin film capacitor and the fixed electrode plate changes under the pressing of the user, thereby producing a change in capacitance.

12. The pressure-sensitive finger cuff of claim 11, wherein, Each pressure sensing unit further comprises a thin film reference capacitor, the spacing between the thin film reference capacitor and the fixed electrode plate remains unchanged under the pressing of the user, and the thin film reference capacitor is used to determine the amount of capacitance change of the thin film capacitor under the pressing of the user.

13. An operating method, characterized in that The pressure sensing module comprises N pressure sensing units, and N is an integer greater than 1. The pressure sensing finger sleeve detects a pressing signal of a user, wherein the pressure sensing finger sleeve establishes a pairing connection with a terminal device, and the pressure sensing finger sleeve is the pressure sensing finger sleeve in any one of claims 1 to 12. In a case where the pressing signal of the user is detected, the pressing signal is transmitted by a flexible antenna of the pressure sensing finger sleeve, so that the terminal device receives the pressing signal by an antenna and responds to the pressing signal.

14. The method of claim 13, wherein, The pressure sensing finger sleeve detects a pressing signal of a user, comprising: The pressure sensing finger sleeve acquires a deformation variable of the pressure sensing module, and judges whether the deformation variable is greater than a preset deformation threshold; In a case where the deformation variable is greater than the preset deformation threshold, it is determined that the pressing signal of the user is detected.

15. An operating method, characterized by Comprising: The terminal device receives the pressing signal transmitted by the pressure sensing finger sleeve by an antenna, and acquires pressing position information of the pressing signal, wherein the terminal device establishes a pairing connection with the pressure sensing finger sleeve, and the pressure sensing finger sleeve is the pressure sensing finger sleeve in any one of claims 1 to 12. The pressing signal is responded according to the pressing position information.

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