Intelligent glasses and control method thereof

Abstract

The application discloses intelligent glasses and a control method thereof. The intelligent glasses comprise a glasses body, a knob structure and a first capacitive sensor. The glasses body comprises a frame and a temple. The knob structure is arranged on the frame or the temple. The knob structure comprises a knob body. The knob body comprises a knob cap, a rotating shaft connected with the knob cap and a rotating tray arranged on the rotating shaft. The first capacitive sensor comprises a first detection electrode plate and a grounding conductive block. The first detection electrode plate is annularly arranged in a receiving cavity and sleeved on the outer periphery of the rotating shaft. The grounding conductive block is arranged on the side of the rotating tray facing the first detection electrode plate and rotates synchronously with the rotating tray, so that the capacitive signal between the first detection electrode plate and the grounding conductive block changes with the rotation angle. The intelligent glasses realize non-contact rotation detection through the capacitive sensor, which is beneficial to meeting the application requirements of thinning and miniaturization of the intelligent glasses.

Description

Technical Field

[0001] This application relates to the field of electronic technology, specifically to a smart pair of glasses and its control method. Background Technology

[0002] With the continuous development of wearable device technology, smart glasses, as an emerging type of smart wearable device, are gradually gaining widespread application. Current knob-type adjustment solutions mainly use mechanical encoders or Hall effect sensors to achieve rotation detection. The mechanical encoder solution mechanically connects the knob to an encoder; when the user rotates the knob, it drives the encoder shaft to rotate, and the encoder outputs corresponding pulse signals through internal contacts, thereby detecting the rotation angle and direction. The Hall effect sensor solution uses a magnetic component on the knob, and detects the knob's rotation state by sensing changes in the magnetic field through a Hall element.

[0003] However, mechanical encoders contain intricate mechanical structures such as shafts, brushes, and code disks, resulting in a large overall size and occupying significant installation space within smart glasses. Similarly, Hall effect sensor solutions require considerable internal space to accommodate magnetic components and Hall effect elements, making it difficult to meet the demands for thinner and smaller smart glasses.

[0004] Therefore, the technology still needs to be improved and enhanced. Summary of the Invention

[0005] This application provides a smart glasses and its control method, which replaces mechanical encoders and Hall sensors with non-contact rotation detection using capacitive sensors and grounded conductive blocks. This achieves interaction while alleviating the problem of large size of traditional knobs, thus helping to meet the application requirements of thinner and smaller smart glasses.

[0006] This application provides a smart glasses, which includes: The eyeglasses body includes a frame and temples that are rotatably connected to the frame. A knob structure is provided on the frame or temple of the eyeglasses. The knob structure includes a knob body, a knob cap, a rotating shaft connected to the knob cap, and a rotating tray provided on the rotating shaft. The knob cap is exposed on the outer side wall of the eyeglasses body. The rotating shaft passes through the eyeglasses body and extends into the receiving cavity of the eyeglasses body. The rotating tray is located inside the receiving cavity and is fixedly connected to the rotating shaft. The first capacitive sensor includes a first detection electrode and a grounding conductive block. The first detection electrode is arranged in a ring shape in the receiving cavity and sleeved on the outer periphery of the rotating shaft. The grounding conductive block is located on the side of the rotating tray facing the first detection electrode and rotates synchronously with the rotating tray, so that a capacitance signal that changes with the rotation angle is generated between the first detection electrode and the grounding conductive block.

[0007] In some embodiments of the smart glasses, the first detection electrode includes: A first flexible substrate, the first flexible substrate having an annular region; Multiple first sensing electrodes are disposed in an annular region; the multiple first sensing electrodes are arranged at intervals along the circumference of the annular region. Multiple second sensing electrodes are disposed in an annular region and arranged at intervals along the circumference; The first sensing electrode and the second sensing electrode are arranged alternately along the circumference of the annular region, and the first sensing electrode and the second sensing electrode are insulated from each other and spaced apart.

[0008] In some embodiments of the smart glasses, a first flexible substrate is provided with a conductive connection portion, which interconnects the first sensing electrodes.

[0009] In some embodiments of the smart glasses, the second sensing electrode includes two second electrode blocks arranged radially along the annular region and connected to each other to form a radially extending integral electrode.

[0010] In some embodiments of the smart glasses, the smart glasses further include a second capacitive sensor, the second capacitive sensor comprising: The second detection electrode plate is fixed to the end of the rotating shaft and located inside the receiving cavity; The signal transmission element is inserted into the rotating shaft. One end of the signal transmission element is connected to the knob cap to form a sensing end at the knob cap. The other end of the signal transmission element extends into the receiving cavity and is electrically connected to the second detection electrode plate.

[0011] In some embodiments of the smart glasses, the second detection electrode plate includes a second flexible substrate; the second flexible substrate is provided with a third sensing electrode and a fourth sensing electrode located around the third sensing electrode, the third sensing electrode and the fourth sensing electrode are insulated from each other, and the third sensing electrode is electrically connected to a signal transmission device.

[0012] In some embodiments of the smart glasses, the knob structure further includes a press trigger, which is disposed in the receiving cavity and is linked to the end of the rotating shaft located inside the receiving cavity. The rotating shaft is adapted to move axially to push the press trigger. The cavity contains a circuit board with pressure-sensitive contacts, and the pressure trigger corresponds to the pressure-sensitive contacts.

[0013] In some embodiments of the smart glasses, the knob structure further includes a damping element disposed on the rotation axis and configured to generate damping during rotation of the knob structure.

[0014] In some embodiments of the smart glasses, the smart glasses also include a retaining spring, the rotating shaft has a retaining groove, the retaining spring is engaged in the retaining groove, the retaining spring is located in the receiving cavity and abuts against the inner wall of the glasses body, so as to prevent the knob from detaching from the glasses body axially.

[0015] This application also provides a control method for smart glasses, which is applied to the aforementioned smart glasses. The control method includes: The capacitance change caused by the rotation of the knob structure is obtained by the first capacitance sensor; The angular position information of the knob structure is determined based on the change in capacitance. The motion information of the knob structure is determined based on at least two consecutive angular position information. Obtain the control commands corresponding to the motion information and execute the control commands.

[0016] In some embodiments of the control method for smart glasses, the step of determining the motion information of the knob structure based on at least two consecutive angular position information includes: Determine the direction and magnitude of change of at least two consecutive angular position information; The rotation direction of the knob structure is determined by the direction of change, and the rotation direction includes counterclockwise or clockwise. The rotational speed of the knob structure is determined based on the change and the time interval between the two angular positions.

[0017] In some embodiments of the smart glasses control method, after the step of determining the rotation speed of the knob structure, the method further includes: The angular acceleration of the knob structure is calculated based on the change in rotational speed and the time interval determined at multiple consecutive time points.

[0018] In some embodiments of the control method for smart glasses, the smart glasses further include a display module, and the step of acquiring control commands corresponding to motion information includes: When the rotation direction is clockwise, a control command is generated to move the display screen in the control display module along the first direction.

[0019] In some embodiments of the control method for smart glasses, the step of obtaining control commands corresponding to motion information includes: When the rotation direction is clockwise, a control command to increase the volume is generated.

[0020] In some embodiments, the control method for smart glasses further includes: When the angular acceleration is positive, a control command is generated to accelerate the flipping of the display screen; when the angular acceleration is negative, a control command is generated to decelerate the flipping of the display screen.

[0021] This application also provides a control method for smart glasses, which is applied to the aforementioned smart glasses. The control method includes: The sensing signal of the knob structure is obtained through a second capacitive sensor; Obtain the control command corresponding to the sensing signal and execute the control command.

[0022] This application provides a smart glasses and its control method. The smart glasses replace traditional mechanical encoders and Hall sensors with non-contact rotation detection using capacitive sensors, eliminating mechanical wear and magnetic field dependence problems, improving detection accuracy and long-term reliability. At the same time, the structure is compact and occupies a small volume, which is conducive to meeting the design requirements of smart glasses to be thinner and smaller. Attached Figure Description

[0023] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the structure of smart glasses provided in an embodiment of this application.

[0025] Figure 2 This is a schematic diagram of the structure of the temple of the smart glasses provided in the embodiments of this application.

[0026] Figure 3 Provided for the embodiments of this application Figure 2 A magnified view of a portion of point A in the middle.

[0027] Figure 4 This is a structural block diagram of the first capacitive sensor and controller in the smart glasses provided in the embodiments of this application.

[0028] Figure 5 This is a schematic diagram of the structure of the first flexible substrate in the smart glasses provided in this application embodiment.

[0029] Figure 6 This is a schematic diagram showing the layout of the first and second sensing electrodes in the smart glasses provided in an embodiment of this application.

[0030] Figure 7 This is an equivalent model diagram of the first capacitive sensor in the smart glasses provided in the embodiments of this application.

[0031] Figure 8 The equivalent circuit diagram of the first capacitive sensor in the smart glasses provided in the embodiments of this application.

[0032] Figure 9 This is a schematic diagram of the structure of the second capacitive sensor in the smart glasses provided in an embodiment of this application.

[0033] Figure 10 This is a structural block diagram of the second capacitive sensor and controller in the smart glasses provided in the embodiments of this application.

[0034] Figure 11 This is a schematic diagram of the structure of the second flexible substrate in the smart glasses provided in this application embodiment.

[0035] Figure 12 This is a schematic diagram showing the layout of the third and fourth sensing electrodes in the smart glasses provided in an embodiment of this application.

[0036] Figure 13 This is an equivalent model diagram of the second capacitive sensor in the smart glasses provided in the embodiments of this application.

[0037] Figure 14 This is a cross-sectional schematic diagram of the temple of the smart glasses provided in an embodiment of this application.

[0038] Figure 15 This is a structural block diagram of the press-sensitive contact and controller in the smart glasses provided in this application embodiment.

[0039] Figure 16 This is a flowchart illustrating one embodiment of the control method for smart glasses provided in this application.

[0040] Figure 17 A flowchart illustrating step S300 of the control method for smart glasses provided in this application embodiment.

[0041] Figure 18 This is a structural block diagram of the display module and controller in the smart glasses provided in an embodiment of this application.

[0042] Figure 19 This is a structural block diagram of the audio output module and controller in the smart glasses provided in the embodiments of this application.

[0043] Figure 20 This is a structural block diagram of the camera module and controller in the smart glasses provided in an embodiment of this application.

[0044] Figure 21 This is a structural block diagram of the linear motor feedback module and controller in the smart glasses provided in this application embodiment.

[0045] Figure 22 This is a flowchart illustrating the steps of another embodiment of the control method for smart glasses provided in this application.

[0046] Figure label: 10. Eyeglasses body; 11. Frame; 12. Temples; 20. Knob structure; 21. Knob body; 211. Rotating shaft; 212. Knob cap; 213. Rotating tray; 22. Press trigger; 23. Snap ring; 201. Snap groove; 30. First capacitive sensor; 31. First detection plate; 311. First flexible substrate; 312. First sensing electrode; 313. Second sensing electrode; 313A (313B), second electrode block; 314. First insulating component; 32. Grounding conductive block; 301. First mounting position; 40. Second capacitive sensor; 41. Second detection electrode; 411. Second flexible substrate; 412. Third sensing electrode; 413. Fourth sensing electrode; 414. Second insulating component; 42. Signal transmission component; 401. Second mounting position; 402. Third mounting position; 50. Controller; 60. Press-sensitive contact; 70. Display module; 80. Audio output module; 90. Camera module; 100. Linear motor feedback module. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Features thus defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0049] This application provides a smart glasses and its control method. The smart glasses replace mechanical encoders and Hall sensors with non-contact rotation detection via capacitive sensors and grounded conductive blocks. This achieves interaction while alleviating the problem of large size associated with traditional knobs, thus facilitating the application requirements of thinner and smaller smart glasses. The following sections provide a detailed description of the smart glasses and its control method.

[0050] Smart glasses are wearable electronic devices that can be placed on the human eye. These include, but are not limited to, virtual reality (VR) glasses, augmented reality (AR) glasses, mixed reality (MR) glasses, and smart glasses with Bluetooth communication or audio playback capabilities. Smart glasses have the form of ordinary eyeglasses, including frames, temples, and electronic components such as controllers and sensors housed within the smart glasses' casing.

[0051] Please refer to the following: Figure 1 , Figure 2 and Figure 3 The smart glasses provided in this application embodiment also have an appearance similar to that of ordinary glasses. Specifically, the smart glasses include a glasses body 10 and a knob structure 20. The glasses body 10 includes a frame 11 and two temples 12 respectively connected to both sides of the frame 11. The two temples 12 are rotatably connected to the frame 11. The knob structure 20 can be disposed on the frame 11 or on the temples 12; its specific installation position can be selected according to actual application needs, and this application does not limit it in this regard. For example, it can be disposed on the outer wall, front end, or rear end of the temple 12, etc., and this application does not limit it in this regard. For ease of explanation, the following embodiment describes the example of the knob structure 20 being disposed on the temple 12.

[0052] The knob structure 20 includes a knob body 21, which includes a knob cap 212, a rotating shaft 211 connected to the knob cap 212, and a rotating tray 213 disposed on the rotating shaft 211. The knob cap 212 is exposed on the outer side wall of the eyeglass body 10, the rotating shaft 211 passes through the eyeglass body 10 and extends into the receiving cavity of the eyeglass body 10, and the rotating tray 213 is located inside the receiving cavity and is fixedly connected to the rotating shaft 211.

[0053] In this embodiment, the knob body 21 includes a knob cap 212, a rotating shaft 211, and a rotating tray 213. The knob cap 212 is exposed on the outer side wall of the temple 12, allowing the user to grip and rotate it from the outside. To improve the feel of operation and prevent finger slippage, the outer circumferential surface of the knob cap 212 can be provided with knurling, raised ribs, or an anti-slip rubber layer, etc. The rotating shaft 211 is fixedly connected to the knob cap 212, and the two can be formed into a whole by means of integral injection molding, interference fit, welding, or bonding. The rotating shaft 211 passes through the side wall of the temple 12 and extends into the receiving cavity inside the temple 12. Specifically, a through hole is provided on the side wall of the temple 12, and the rotating shaft 211 passes through the through hole and can rotate freely about its own axis relative to the side wall of the temple 12.

[0054] The rotating tray 213 is annular and is located within the receiving cavity of the rotating shaft 211, surrounding it. The rotating tray 213 can be fixedly connected to the rotating shaft 211 by screws, adhesive, or snap-fit, achieving zero relative rotation between them. The surface of the rotating tray 213 is approximately perpendicular to the axis of the rotating shaft 211, and its diameter can be designed according to the internal space of the receiving cavity. The rotating tray 213 can be made of plastic material, such as polycarbonate (PC) or acrylonitrile-butadiene-styrene copolymer (ABS). When the rotating tray 213 is made of plastic, a grounding conductive block 32 is disposed on the surface of the rotating tray 213 and grounded via a probe or other means.

[0055] Please refer to the following: Figure 4 The smart glasses in this embodiment also include a first capacitive sensor 30 and a controller 50. The controller 50 is integrated inside the glasses body and electrically connected to the first capacitive sensor 30. Specifically, the first capacitive sensor 30 includes a first detection electrode 31 and a grounding conductive block 32. The first detection electrode 31 is arranged in a ring shape in the receiving cavity and sleeved on the outer periphery of the rotating shaft 211. The grounding conductive block 32 is located on the side of the rotating tray 213 facing the first detection electrode 31 and rotates synchronously with the rotating tray 213, so that a capacitance signal that changes with the rotation angle is generated between the first detection electrode 31 and the grounding conductive block 32.

[0056] The first detection electrode 31 is fixedly disposed within the receiving cavity and is annularly sleeved around the outer periphery of the rotating shaft 211, forming a capacitive detection electrode assembly. The grounding conductive block 32 is a conductive component disposed on the rotating tray 213 and rotating synchronously with the knob. It is grounded and, during rotation, generates a capacitive coupling relationship with the fixed first detection electrode 31 that varies with the rotation angle, facilitating non-contact rotation angle detection. The grounding conductive block 32 can be made of a metal material, such as copper, aluminum, or stainless steel.

[0057] In this embodiment, the first detection electrode 31 is annular and is fixedly disposed on the inner wall of the receiving cavity or on a bracket disposed inside the receiving cavity. The first detection electrode 31 is sleeved on the outer periphery of the rotating shaft 211, that is, the central hole of the first detection electrode 31 is coaxially disposed with the rotating shaft 211, and a certain gap is maintained between the two to ensure that the rotating shaft 211 can rotate freely without mechanically contacting the first detection electrode 31.

[0058] In this embodiment, the smart glasses replace traditional mechanical encoders and Hall sensors with non-contact rotation detection using capacitive sensors. This eliminates mechanical wear and magnetic field dependence, improves detection accuracy and long-term reliability, and also features a compact structure and small footprint, which helps meet the design requirements of making smart glasses thinner and smaller.

[0059] Please refer to the following: Figure 5 and Figure 6 In some embodiments, the first detection electrode 31 includes a first flexible substrate 311, a plurality of first sensing electrodes 312, and a plurality of second sensing electrodes 313. The first flexible substrate 311 is made of a flexible material (such as polyimide PI, PET, etc.), is annular, and its shape is adapted to the outer peripheral surface of the rotation shaft 211. The first flexible substrate 311 can be fixed to the inner wall of the receiving cavity by double-sided adhesive.

[0060] The first flexible substrate 311 has an annular region with a plurality of first mounting positions 301 spaced circumferentially therefrom. These first mounting positions 301 are used to mount first sensing electrodes 312 and second sensing electrodes 313. Specifically, each first mounting position 301 is an electrode receiving area recessed inward relative to the surface of the first flexible substrate 311, defining the mounting position, extension direction, and contour shape of the first sensing electrode 312 or the second sensing electrode 313. The shape of the first mounting position 301 can be adapted to the shape of the corresponding sensing electrode, for example, it can be fan-shaped, strip-shaped, zigzag-shaped, or polygonal, to increase the electrode arrangement density and sensing area within a limited annular region. An insulating gap region is provided between adjacent first mounting positions 301, forming a first insulating member 314 to maintain electrical isolation between adjacent first sensing electrodes 312 and second sensing electrodes 313. The first insulating member 314 can be integrally formed with the first flexible substrate 311 to simplify the manufacturing process and improve insulation reliability.

[0061] Multiple first sensing electrodes 312 are disposed in an annular region; the multiple first sensing electrodes 312 are arranged at intervals along the circumference of the annular region. Multiple second sensing electrodes 313 are disposed in the annular region and arranged at intervals along the circumference. The first sensing electrodes 312 and the second sensing electrodes 313 are arranged alternately along the circumference of the annular region, that is, in the following order along the circumference: first sensing electrode 312, second sensing electrode 313, first sensing electrode 312, second sensing electrode 313... and so on. The first sensing electrodes 312 and the second sensing electrodes 313 are insulated from each other and spaced apart, that is, they do not directly contact each other and maintain a small gap. The first insulating member 314 between the first sensing electrodes 312 and the second sensing electrodes 313 can be integrally formed with the first flexible substrate 311 to simplify the manufacturing process and ensure insulation reliability.

[0062] In one embodiment, there are nine first sensing electrodes 312 and nine second sensing electrodes 313, for a total of 18 electrodes evenly distributed circumferentially. Both the first sensing electrodes 312 and the second sensing electrodes 313 are fabricated on the first flexible substrate 311 using a copper foil etching process.

[0063] As one embodiment, the first flexible substrate 311 is provided with a conductive connection portion, which interconnects the first sensing electrodes 312 so that all the first sensing electrodes 312 can receive the same excitation signal and form a unified transmitting electrode array.

[0064] Furthermore, the first sensing electrode 312 and the second sensing electrode 313 can be arranged in a layered manner. Specifically, multiple first sensing electrodes 312 are located on the same conductive layer, and multiple second sensing electrodes 313 are located on another conductive layer, with the two layers separated by an insulating layer. The multiple first sensing electrodes 312 located on the same layer are directly connected by conductive connections. This layered arrangement allows the first sensing electrode 312 and the second sensing electrode 313 to each occupy an independent conductive layer, with electrical isolation between them achieved by an insulating layer. This provides a high degree of freedom in wiring, as the conductive connections can be directly interconnected on the conductive layer where the first sensing electrode 312 is located, without needing to cross the wiring area of ​​the second sensing electrode 313, which helps to simplify wiring and reduce manufacturing difficulty.

[0065] The first sensing electrode 312 and the second sensing electrode 313 can also be arranged in the same layer. Specifically, multiple first sensing electrodes 312 and multiple second sensing electrodes 313 are located in the same conductive layer. In this case, the conductive connection can be a metal via, through which two adjacent first sensing electrodes 312 are connected, thereby realizing the connection of multiple first sensing electrodes 312. The same-layer arrangement only requires a single conductive layer to simultaneously support the first sensing electrodes 312 and the second sensing electrodes 313, reducing the number of layers of the flexible substrate and helping to reduce the overall thickness and material cost of the first detection electrode plate 31. In this solution, the metal via passes through the substrate layer of the first flexible substrate 311, and on the other side of the substrate layer, adjacent first sensing electrodes 312 are electrically connected through bridging traces. These bridging traces are offset from the second sensing electrodes 313 in the same layer in the projection direction, thereby avoiding short circuits.

[0066] In some embodiments, the first sensing electrode 312 includes a first electrode block, which is rhomboid in shape. A gap is formed between adjacent first electrode blocks arranged diagonally opposite each other. The second sensing electrode 313 includes two second electrode blocks, 313A and 313B, which are arranged radially along the annular region and connected to each other to form a radially extending integral electrode. Specifically, the two second electrode blocks are located radially inner and radially outer of the first electrode block, respectively, and are directly connected at the gap, thus forming an integral electrode structure.

[0067] In this embodiment, the second sensing electrode 313 adopts a radially integrated design, allowing each second sensing electrode 313 to cover a large radial area of ​​the annular region, thus increasing the effective sensing area of ​​a single electrode. This improves the sensitivity of the electrode to capacitance changes, enabling a sufficiently strong detection signal to be obtained even when the axial gap between the grounding conductive block 32 and the first detection electrode plate 31 is large. Simultaneously, utilizing the diagonal gap between adjacent first sensing electrodes 312 as a connection channel between the two second electrode blocks avoids the need for additional bridging trace layers on the flexible substrate, simplifying the manufacturing process and reducing parasitic capacitance between the electrodes.

[0068] In this embodiment, the first sensing electrode 312 of the first capacitive sensor 30 is the transmitting electrode, and the second sensing electrode 313 is the receiving electrode. Mutual capacitance is formed between the first sensing electrode 312 and the second sensing electrode 313 through electric field coupling. When no grounding conductive block 32 is nearby, there is a basic mutual capacitance value between the transmitting and receiving electrodes. When the grounding conductive block 32 rotates to the vicinity of the electric field region between the transmitting and receiving electrodes, it absorbs some electric field lines due to grounding, causing a change in the electric field distribution between the transmitting and receiving electrodes, thereby reducing the mutual capacitance value between them. As the knob structure 20 continues to rotate, the grounding conductive block 32 passes through different electrode pairs in sequence, and the mutual capacitance value of each receiving electrode changes accordingly. By detecting the capacitance change of each receiving electrode, the current circumferential position of the grounding conductive block 32 can be determined, and the rotation angle of the knob can be calculated.

[0069] Please refer to the following: Figure 7 and Figure 8 From the perspective of the equivalent circuit, the first detection electrode 31 in the annular region is a mutual capacitance sensing structure, consisting of a continuous annular first sensing electrode 312 (L channel) and multiple sets of radially integrated second sensing electrodes 313 (S channel) arranged alternately and insulated along the circumference, corresponding to the L and S dual ports of the mutual capacitance equivalent circuit. In the simplified equivalent circuit, the L channel and the S channel are coupled through an equivalent capacitance C_LS, which is the mutual capacitance between the L and S electrodes.

[0070] When the grounding conductive block 32 is not rotated to the vicinity of the current LS electrode pair (i.e., the state without grounding conductive block 32), which is equivalent to the "NO finger" state in Figure (b), there is a basic mutual capacitance C_LS,0 between the L channel and the S channel. At this time, there is only one capacitor element, C_LS,0, in the equivalent circuit. At this time, the signal quantity collected by the controller 50 in the smart glasses through the ADC is the capacitance value corresponding to C_LS,0.

[0071] When the grounding conductive block 32 rotates to the vicinity of the current LS electrode pair (i.e., in the state where the grounding conductive block 32 is present), the grounding conductive block 32 acts as a grounding conductor and intervenes in the electric field region between the L channel and the S channel, equivalent to the "Finger" state in Figure (a). In the complete equivalent circuit model, the human body or grounding conductive block 32 is equivalent to the HBM (Human Body Model) branch. This branch is coupled to the L channel and the S channel through coupling capacitors C_LF and C_FS, respectively, shunting the electric field between the two electrodes, so that the residual mutual capacitance between the L channel and the S channel is reduced to C_LS,1, i.e., C_LS,1 is less than C_LS,0. At this time, in the equivalent circuit, C_LF connects the L channel and the grounding conductor, C_FS connects the S channel and the grounding conductor, C_ADC (i.e., C_LS,1) connects the L channel and the S channel, and the HBM branch is grounded through a series resistor. The controller 50 in the smart glasses collects C_LS,0 when there is no grounding conductive block 32 and C_LS,1 (i.e. the capacitance signal at both ends of C_ADC) when there is a grounding conductive block 32. By calculating the difference between the two, it can determine whether there is a grounding conductive block 32 near the current LS electrode pair and quantify its proximity.

[0072] Since multiple independent S-channel electrodes are arranged circumferentially along the annular region, the controller 50 can obtain the mutual capacitance difference (C_LS,0 minus C_LS,1) of each group of LS electrode pairs. By comparing the magnitude of the differences between each group, the controller identifies the current circumferential position of the grounding conductive block 32 in the annular region. Specifically, the S-channel electrode with the largest mutual capacitance difference is the electrode closest to the grounding conductive block 32. By combining the differences between adjacent electrodes and performing interpolation calculations, more accurate angular position information can be obtained.

[0073] Specifically, the controller 50 collects the capacitance values ​​of each of the second sensing electrodes 313. When the grounding conductive block 32 is located between a pair of adjacent transmitting-receiving electrodes, the capacitance value of the receiving electrode will change significantly. By comparing the magnitude of the capacitance change of each receiving electrode, it is possible to determine which receiving electrode the grounding conductive block 32 is closest to, thus achieving coarse positioning. Furthermore, by using the ratio of the capacitance changes of two adjacent receiving electrodes, sub-pixel level interpolation calculations can be performed to obtain a more precise angular position. The formula for calculating the angular position can be expressed as: position_x = function_deal(xx.idx, xx.nbraw) + xx.idx × 512, where xx.idx is the currently active electrode number (numbered from 1 to n), xx.nbraw is the original capacitance deviation data, function_deal is the interpolation calculation function based on the capacitance deviation, and 512 is the coordinate resolution of a single electrode. This formula enables high-precision calculation of the knob rotation angle.

[0074] When determining the rotation direction of the knob, the system continuously collects angular position information at multiple moments and judges the rotation direction by comparing the trend of angle value changes at adjacent moments. For example, when the angle value increases with time, the knob is determined to rotate clockwise; when the angle value decreases with time, the knob is determined to rotate counterclockwise. Because the electrodes are arranged in a ring, the angle value has a periodicity (returning from the maximum value to the minimum value or from the minimum value to the maximum value). The controller 50 automatically identifies this periodic jump through an algorithm and makes corresponding adjustments. For example, when the knob rotates in reverse, the angle value may suddenly change from 0 to the maximum value (e.g., 1000). After the algorithm identifies this jump, it adjusts the actual coordinate value to N-1000 (N is the measured coordinate value), thus ensuring the continuity of the angle value. When the knob stops rotating, the system can reset the angle value to zero for the next detection.

[0075] Please see Figure 9 and Figure 10 In some embodiments, the smart glasses also include a second capacitive sensor electrically connected to the controller 50. Specifically, the second capacitive sensor is used to detect touch operations of the user's finger on the knob cap 212. The second capacitive sensor includes a second detection plate 41 and a signal transmission element 42. The second detection plate 41 is fixed to the end of the rotating shaft 211 and located within the receiving cavity.

[0076] Please refer to the following: Figure 11 and Figure 12 The second detection electrode 41 includes a second flexible substrate 411, on which a third sensing electrode 412 and a fourth sensing electrode 413 are disposed. The second flexible substrate 411 has a second mounting position 401 and a third mounting position 402. The second mounting position 401 is located in the central region of the second flexible substrate 411, and the third mounting position 402 is disposed around the second mounting position 401. The second mounting position 401 is used to mount the third sensing electrode 412, and the third mounting position 402 is used to mount the fourth sensing electrode 413.

[0077] Specifically, both the second mounting position 401 and the third mounting position 402 are electrode receiving areas recessed inward relative to the surface of the second flexible substrate 411. The second mounting position 401 defines the mounting position, extension direction, and outline shape of the third sensing electrode 412. The third mounting position 402 is an annular or quasi-annular electrode receiving area surrounding the second mounting position 401, defining the mounting position, surrounding range, and outline shape of the fourth sensing electrode 413. An insulating region is formed between the second mounting position 401 and the third mounting position 402, which forms a second insulating member 414 to insulate the third sensing electrode 412 disposed at the second mounting position 401 and the fourth sensing electrode 413 disposed at the third mounting position 402 from each other.

[0078] The third sensing electrode 412 is disposed in the central region of the second flexible substrate 411, serving as the sensing electrode for self-capacitance detection. The fourth sensing electrode 413 is disposed around the periphery of the third sensing electrode 412, serving as a shielding electrode. The third sensing electrode 412 and the fourth sensing electrode 413 are insulated from each other, i.e., they are separated by a gap and not directly electrically connected. The second insulating member 414 between the third sensing electrode 412 and the fourth sensing electrode 413 may be integrally disposed with the second flexible substrate 411.

[0079] The signal transmission element 42 passes through the interior of the rotating shaft 211, for example, it can pass through the axial central hole of the rotating shaft 211. The signal transmission element 42 can be implemented in the form of a thin wire, a conductive spring, or a flexible circuit board. One end of the signal transmission element 42 is connected to the knob cap 212 to form a sensing end at the knob cap 212; the other end of the signal transmission element 42 extends into the receiving cavity and is electrically connected to the second detection electrode 41. Specifically, the third sensing electrode 412 is electrically connected to the signal transmission element 42.

[0080] Please see Figure 13 In this embodiment, the second capacitive sensor achieves touch detection based on the principle of self-capacitance sensing. In its equivalent circuit, the total capacitance satisfies the formula: Ctotal = Cfinger + Cbackground + Cevn. Where Ctotal is the total capacitance, Cfinger is the capacitance introduced by the finger, Cbackground is the background parasitic capacitance between the third sensing electrode 412 and the environment (such as the grounded housing of the containment cavity), and Cevn is the stray capacitance introduced by the signal transmission element 42. The third sensing electrode 412 is equivalent to the ITO conductive electrode plate in the self-capacitance sensing structure, serving as the sensing conductor for self-capacitance detection. The signal transmission element 42 is equivalent to a conductive trace with a series resistor R, one end of which is connected to the knob cap 212 to form a human body coupling interface. When a finger touches the knob cap 212, capacitive coupling is formed between the human body and the third sensing electrode 412 through the signal transmission element 42, generating an effective touch capacitance Cfinger.

[0081] The controller 50 obtains the finger capacitance Cfinger by separately acquiring the base capacitance value (Cbackground + Cevn) when there is no touch and the total capacitance value (Ctotal) when there is touch, and then calculating the difference between the two. When Cfinger exceeds a preset touch threshold, the system determines that the user has performed a touch operation.

[0082] The fourth sensing electrode 413, acting as a shielding electrode, is grounded to reduce the background parasitic capacitance Cbackground of the third sensing electrode 412. Specifically, the fourth sensing electrode 413 surrounds the third sensing electrode 412, isolating it from surrounding grounded structures (such as the inner wall of the cavity, the circuit board ground plane, etc.), reducing the number of electric field lines extended from the third sensing electrode 412 to the surrounding environment, thereby reducing the size of the background parasitic capacitance Cbackground. The reduction in background parasitic capacitance means a decrease in floor noise, which in turn improves the signal-to-noise ratio and sensitivity of touch detection.

[0083] It should be noted that since the second detection electrode 41 is fixed to the end of the rotating shaft 211 and rotates synchronously with the knob, and the signal transmission component 42 is installed inside the rotating shaft 211, the third sensing electrode 412 and the knob cap 212 are always electrically connected through the signal transmission component 42, regardless of the angle to which the knob is rotated, thus ensuring the continuity and reliability of touch detection.

[0084] Please see Figure 14 and Figure 15 In some embodiments, the knob structure 20 further includes a press trigger 22. Specifically, the press trigger 22 is disposed within the receiving cavity, and the press trigger 22 is linked to the end of the rotating shaft 211 located inside the receiving cavity. The rotating shaft 211 is adapted to move axially to push the press trigger 22. A circuit board (such as a PCB board) is provided inside the receiving cavity, and a press sensing contact 60 is provided on the circuit board. The press trigger 22 corresponds to the press sensing contact 60, and a corresponding controller 50 can be integrated into the circuit board and electrically connected to the press trigger point.

[0085] When the user presses the knob cap 212 axially (i.e., towards the inside of the glasses body 10), the knob cap 212 drives the rotating shaft 211 to move axially inward. The inner end of the rotating shaft 211 pushes the pressing trigger 22, which in turn triggers the pressing sensing contact 60 on the circuit board, generating a pressing trigger signal. After the controller 50 in the smart glasses detects this pressing trigger signal, it determines that the user has performed a pressing operation. When the user releases the knob cap 212, the rotating shaft 211 returns to its initial position axially outward under the action of an elastic reset element (such as a spring or spring sheet), and the pressing trigger 22 separates from the pressing sensing contact 60.

[0086] The press trigger 22 can be implemented in various structural forms. For example, the press trigger 22 can be a conductive spring, one end of which is in contact with or fixedly connected to the end face of the rotating shaft 211, and the other end is located above the press sensing contact 60. When the rotating shaft 211 moves axially, the other end of the conductive spring presses down and contacts the press sensing contact 60, forming a conduction signal. Alternatively, the press trigger 22 can be an insulating push rod, with a conductive layer on its lower end corresponding to the press sensing contact 60. When the push rod is pressed down, the conductive layer contacts the press sensing contact 60 to form a conduction.

[0087] In this embodiment, the knob cap 212, through the aforementioned press trigger 22, simultaneously supports both rotation and press operations. Users can rotate the knob cap 212 to perform continuous adjustment functions such as menu scrolling and volume control, and press the knob cap 212 to perform discrete operation functions such as confirming selection and triggering photo capture. This single-knob, multi-functional integrated solution greatly simplifies the interaction design of smart glasses, reduces the number of independent buttons, and facilitates the simplification and miniaturization of the entire device.

[0088] As one embodiment, the knob structure 20 also includes a damping element (not shown in the figure), which is disposed on the rotation shaft 211 and configured to generate damping during the rotation of the knob structure. The damping element can be implemented in various structural forms. For example, the damping element can also be an elastic friction plate disposed on the rotation shaft 211, which elastically abuts against the wall of the through hole or the inner wall of the receiving cavity, providing damping torque through friction. The damping element can also be a magnetic damping structure, which generates damping torque by disposing of a conductive disk and a permanent magnet on the rotation shaft 211 using the eddy current effect.

[0089] In this embodiment, a damping element is incorporated to provide appropriate damping torque during knob rotation. This allows the user to experience uniform resistance feedback when rotating the knob, thereby alleviating the problem of the knob wobbling freely or over-rotating due to excessive flexibility, and improving the user's operating feel and control precision. The magnitude of the damping torque can be designed according to actual application requirements. For example, a smaller damping torque can be provided in menu scrolling scenarios to allow for rapid scrolling, while a larger damping torque can be provided in precise parameter adjustment scenarios to improve adjustment accuracy.

[0090] Please continue reading. Figure 14 As one embodiment, the smart glasses also include a retaining ring 23. The rotating shaft 211 has a retaining groove 201. The retaining ring 23 is engaged in the retaining groove 201. The retaining ring 23 is located in the receiving cavity and abuts against the inner wall of the glasses body 10 to prevent the knob from detaching from the glasses body 10 axially.

[0091] Specifically, the retaining groove 201 is formed on the outer circumferential surface of the rotating shaft 211 and located inside the receiving cavity. The retaining spring 23 is an elastic open retaining ring, the inner diameter of which is slightly smaller than the shaft diameter at the location of the retaining groove 201. During installation, the retaining spring 23 elastically expands and engages with the retaining groove 201, and is tightly held in the retaining groove 201 under the action of elastic restoring force. The outer diameter of the retaining spring 23 is larger than the diameter of the through hole on the side wall of the temple 12. Therefore, when the knob structure 20 is subjected to an outward axial pulling force, the outer edge of the retaining spring 23 abuts against the inner wall surface of the side wall of the temple 12, preventing the knob structure 20 from moving further outward, thereby achieving axial limiting.

[0092] Please see Figure 16 This application also provides a control method for smart glasses, which is applied to the aforementioned smart glasses. The control method includes steps S100-S400, as follows: S100: The capacitance change value caused by the rotation of the knob structure 20 is obtained by the first capacitance sensor 30.

[0093] Specifically, an excitation signal is periodically applied to the first sensing electrode 312 at a preset sampling frequency (e.g., 100Hz to 1000Hz), and the capacitance value of each second sensing electrode 313 is read simultaneously. When the grounding conductive block 32 is rotated to different positions with the knob, the capacitance value of each receiving electrode changes accordingly. Afterwards, the analog capacitance signal is converted into a digital signal for further processing.

[0094] S200. Determine the angular position information of the knob structure 20 based on the capacitance change value.

[0095] After receiving the capacitance values ​​of each receiving electrode, the capacitance change of each electrode is first calculated (the difference between the current capacitance value and the reference capacitance value). Then, the current circumferential position of the grounding conductive block 32 is determined based on the distribution of capacitance changes. Specifically, the calculation method is as follows: find the receiving electrode with the largest capacitance change and determine that the grounding conductive block 32 is closest to that electrode; then, use the ratio of the capacitance change of that electrode to that of its adjacent electrodes for interpolation calculation to obtain the precise angular position at the sub-electrode level. The final output angular position information can be represented by an angle value (e.g., 0° to 360°) or a coordinate value (e.g., 0 to N-1, where N is the total resolution).

[0096] S300. Determine the motion information of the knob structure 20 based on at least two consecutive angular position information. The motion information includes, but is not limited to, rotation direction, rotation speed, and angular acceleration.

[0097] Specifically, the controller 50 has an internal timer or system clock that acquires the current angular position information at predetermined sampling intervals (e.g., 10ms, 20ms, or 50ms) and stores it in chronological order. Then, based on two or more consecutive angular position data points, the angular change of the knob structure 20 between two moments is calculated, and the rotation direction and speed are determined based on the magnitude of this change and the time interval. When three or more consecutive angular position data points are stored, angular acceleration can also be further calculated.

[0098] Please refer to the following: Figure 17 In some embodiments, step S300 includes steps S310-S330, as follows: S310. Determine the direction and amount of change of at least two consecutive angular position information.

[0099] In this embodiment, the angle position information θ(n) collected at the current time t2 and the angle position information θ(n-1) collected at the previous time t1 are obtained. Then, the difference Δθ = θ(n-1) - θ(n) is calculated. This difference Δθ represents the change between two consecutive angle position information. The change Δθ is a signed value; its sign (positive or negative) represents the direction of the angle change, and its absolute value |Δθ| represents the magnitude of the angle change. If Δθ is positive, it indicates that the current angle θ(n-1) increases relative to the previous angle θ(n) in a preset positive direction; if Δθ is negative, it indicates that the current angle θ(n-1) decreases relative to the previous angle θ(n) in a preset positive direction.

[0100] S320. Determine the rotation direction of the knob structure 20 according to the direction of change. The rotation direction includes counterclockwise or clockwise.

[0101] In this embodiment, by comparing the current angle position value θ(n) with the previous angle position value θ(n-1), the rotation direction of the knob structure 20 can be determined based on the sign of the change Δθ. For example, if θ(n) > θ(n-1), Δθ is negative, and the knob is determined to rotate clockwise; if θ(n) < θ(n-1), Δθ is positive, and the knob is determined to rotate counterclockwise. Alternatively, it can be calibrated so that when the change Δθ is positive, the knob structure 20 rotates clockwise; and when the change Δθ is negative, the knob structure 20 rotates counterclockwise. The specific mapping relationship used can be calibrated before shipment based on the actual application scenario of the smart glasses and user habits, and a software setting interface can be provided for user customization. This embodiment does not impose specific limitations on this.

[0102] S330. Determine the rotation speed of the knob structure 20 based on the change and the time interval between the two angular position information.

[0103] Calculate the angular change Δθ = |θ(n) - θ(n-1)| between two adjacent moments, and the corresponding time interval Δt. Then, the rotational speed ω = Δθ / Δt. The unit of rotational speed can be degrees per second (° / s) or radians per second (rad / s).

[0104] In some embodiments, after step S330, the method further includes: calculating the angular acceleration of the knob structure 20 based on the changes in rotational speed and time intervals determined at multiple consecutive time points. Specifically, after obtaining the rotational speed at multiple consecutive time points, the changes in rotational speed at adjacent time points are calculated as Δω = ω(n) - ω(n-1), and the corresponding time interval Δt. Then, the angular acceleration α = Δω / Δt. When the angular acceleration α > 0, it indicates that the knob is accelerating; when the angular acceleration α < 0, it indicates that the knob is decelerating; when the angular acceleration α ≈ 0, it indicates that the knob is rotating at approximately a constant speed.

[0105] S400: Obtain the control command corresponding to the motion information and execute the control command.

[0106] Based on motion information such as the rotation direction, rotation speed, and angular acceleration of the knob, corresponding control commands are generated and executed to realize the preset interactive functions of the smart glasses.

[0107] Please refer to the following: Figure 18 Furthermore, the smart glasses also include a display module 70, which is electrically connected to the controller 50. Specifically, the display module 70 may be an optical see-through display unit in augmented reality (AR) glasses, an immersive display screen in virtual reality (VR) glasses, or a micro-projection component on the smart glasses for displaying menu information.

[0108] As one embodiment, step S400 includes: when the rotation direction is clockwise, generating a control command to move the display screen in the display module 70 along a first direction; and when the rotation direction is counterclockwise, generating a control command to move the display screen in the display module 70 along a second direction opposite to the first direction. The first direction can be the downward scrolling direction of a menu list, the rightward panning direction in image browsing, or the downward movement direction of the cursor in the interface. The second direction can be the upward scrolling direction of a menu list, the leftward panning direction in image browsing, or the upward movement direction of the cursor in the interface.

[0109] In another embodiment, step S400 includes: generating a control command to increase the volume when the rotation direction is clockwise; and generating a control command to decrease the volume when the rotation direction is counterclockwise.

[0110] Please refer to the following: Figure 19 In this embodiment, the smart glasses also include an audio output module 80, which is electrically connected to the controller 50. Specifically, the audio output module 80 includes, but is not limited to, a speaker and a Bluetooth audio output interface. The controller 50 can generate volume control commands based on the rotation direction. For example, when the controller 50 determines that the rotation direction of the knob body 21 is clockwise, it generates a control command to increase the volume. When the controller 50 determines that the rotation direction of the knob body 21 is counterclockwise, it generates a control command to decrease the volume, thereby realizing the volume adjustment function of the knob structure 20.

[0111] In some embodiments, the control method further includes: generating a control command to accelerate the flipping of the display screen when the angular acceleration is positive; and generating a control command to decelerate the flipping of the display screen when the angular acceleration is negative.

[0112] In this embodiment, the angular acceleration of the knob body 21 is obtained. A positive angular acceleration indicates that the knob is accelerating, while a negative angular acceleration indicates that the knob is decelerating. Display screen rotation can be understood as dynamic effects such as rapid scrolling of menu items, rapid image switching, e-book page turning, or interface transition animations. When the controller 50 detects a positive angular acceleration, it generates a control command to accelerate the rotation of the display screen. The display module 70 responds to this command, gradually increasing the rotation speed of the current display screen. For example, when the user quickly turns the knob to generate positive angular acceleration, the menu scrolling speed gradually increases from a constant speed, achieving the effect of quickly jumping from the current page to a distant page. When the controller 50 detects a negative angular acceleration, it generates a control command to decelerate the rotation of the display screen. The display module 70 responds to this command, gradually slowing down the rotation speed of the display screen. For example, when the user stops rotating or reduces the turning amplitude, the menu scrolling speed smoothly decreases until it precisely stops on the target option. Due to angular acceleration, after the knob body 21 stops rotating, its angular acceleration does not immediately return to zero, but continues to decrease to zero according to a certain decay law; correspondingly, the displayed screen (such as icons or menus) also gradually decelerates until it stops gently, rather than stopping instantaneously. Therefore, the smart glasses can dynamically adjust the flipping speed of the displayed screen according to the rotational acceleration applied by the user to the knob, providing the user with a smooth interactive experience with speed feedback.

[0113] Please refer to the following: Figure 20As one embodiment, the smart glasses also include a camera module 90, which is electrically connected to the controller 50. The controller 50 can also adjust the shooting parameters of the camera module 90 or select the shooting mode by rotating the knob structure 20. The shooting parameters include, but are not limited to, exposure compensation value, white balance color temperature, ISO sensitivity, shutter speed, and focus distance; the shooting modes include, but are not limited to, portrait mode, landscape mode, night scene mode, sports mode, and professional mode.

[0114] Specifically, the knob structure 20 has opposite adjustment functions when rotated clockwise and counterclockwise. For example, when adjusting the exposure compensation value, clockwise rotation increases the exposure, and counterclockwise rotation decreases the exposure; when adjusting the white balance color temperature, clockwise rotation increases the color temperature, and counterclockwise rotation decreases the color temperature; when switching shooting modes, clockwise rotation switches backward, and counterclockwise rotation switches forward. Users can also control the adjustment step size according to the rotation speed of the knob, with slow rotation for fine adjustment and fast rotation for rapid switching.

[0115] It should be noted that the function of the knob structure 20 in this embodiment is not limited to camera parameter adjustment. Its specific control function can be matched with other functional modules of the smart glasses to set different interactive functions.

[0116] Please refer to the following: Figure 21 In some embodiments, the smart glasses also include a linear motor feedback module 100, which is communicatively connected to the controller 50. Specifically, the linear motor feedback module is used to output differentiated vibration feedback signals to the user during the interaction process of the knob structure 20, based on different interaction stages and different operation types. In this embodiment, the multimodal tactile feedback generated by the linear motor feedback module 100 can clearly inform the user of the current operation status and process progress, compensating for the lack of interactive information in scenarios where visual and auditory feedback is insufficient, thereby significantly improving the user experience.

[0117] During the menu interaction phase, the linear motor feedback module 100, in conjunction with the audio output module 80, provides haptic feedback based on the rotation angle of the knob as the user rotates it. For example, a slight vibration is output for every 10° rotation, accompanied by a "tick" sound effect to simulate the tactile feedback of a physical knob. The frequency of the vibration and sound increases with faster rotation speed and decreases with slower rotation speed.

[0118] Specifically, the system senses changes in the user's operating force by calculating angular acceleration α = Δω / Δt: when the angular acceleration continues to increase and the rotation speed also increases, the system increases the intensity of vibration and sound effects, giving the user a feeling of "passing through quickly"; when the angular acceleration decreases but the rotation speed is still relatively high, the system appropriately reduces the intensity of vibration but keeps the interval of sound effects unchanged; when the angular acceleration is negative and the rotation speed decreases, the system continuously reduces the intensity of vibration and the interval of sound until the knob stops rotating, giving the user a natural feeling of "decelerating and stopping".

[0119] In this embodiment, a multimodal feedback mechanism with differentiated stages allows users to clearly perceive their current interaction stage and operational status, avoiding misoperations caused by missing or limited feedback. Simultaneously, the combined use of vibration and audio feedback ensures effective confirmation of operation even in noisy environments or when the user's attention is not fully focused on the glasses.

[0120] Please see Figure 22 In some embodiments, the control method for smart glasses provided in this application further includes steps S101 and S102, which are as follows: S101. Obtain the sensing signal of the knob structure 20 through the second capacitive sensor.

[0121] In this embodiment, a self-capacitance detection signal is periodically applied to the third sensing electrode 412, and the total capacitance value Ctotal of the third sensing electrode 412 is collected. Then, the currently collected Ctotal value is compared with the base capacitance value (Cbackground + Cevn) when there is no touch, and the difference is calculated to obtain the finger capacitance Cfinger. When Cfinger exceeds a preset touch threshold, it can be determined that the user's finger has touched the knob cap 212.

[0122] S102. Obtain the control command corresponding to the sensing signal and execute the control command.

[0123] When it is determined that the user's finger has touched the knob cap 212, the controller 50 can obtain the corresponding control command based on the sensing signal. The control command is associated with the current application scenario of the smart glasses.

[0124] Specifically, the controller 50 stores a preset instruction mapping table in its memory. The instruction mapping table establishes corresponding instruction sets for different application scenarios (such as camera shooting, audio playback, call, and menu selection). For example, when the controller 50 determines that it is currently in a camera shooting scenario, the sensing signal can correspond to a camera parameter adjustment instruction; when the controller 50 determines that it is currently in an audio playback scenario, the sensing signal can correspond to a volume control instruction or a track switching instruction; when the controller 50 determines that it is currently in a menu selection scenario, the sensing signal can correspond to a menu option switching or confirmation instruction. After acquiring the control instruction, the controller 50 controls the corresponding functional module to perform the corresponding operation according to the control instruction, thereby realizing the interactive control of the smart glasses.

[0125] The following examples illustrate the control methods for the aforementioned smart glasses in a camera shooting scenario: A user wearing smart glasses sees a beautiful view outdoors and wants to quickly capture it. The smart glasses are in standby mode with the screen off. The user touches the knob cap 212 with their finger (without pressing), the second capacitive sensor detects the touch signal, the smart glasses wake up, the viewfinder preview screen lights up, and the user enters pre-capture mode. Simultaneously, the controller 50 controls the linear motor feedback module 100 to output a short vibration (20ms, slight intensity) to indicate that the touch has been recognized.

[0126] If a user observes that the current exposure is too low in the viewfinder, they can rotate the knob 212 clockwise. The first capacitive sensor 30 detects the rotation angle in real time and generates an exposure compensation increase command based on the rotation direction and angle, gradually increasing the exposure value. During rotation, the controller 50 controls the linear motor feedback module 100 to output continuous pulse vibrations linked to the rotation speed, allowing the user to adjust the exposure precisely through tactile perception.

[0127] Once the exposure compensation is adjusted to a satisfactory value, pressing the knob cap 212 (similar to pressing the shutter button) will cause the pressing trigger 22 located below the knob cap 212 to generate a pressing signal. After receiving the pressing signal, the controller 50 will control the camera module 90 to perform the actual photo taking operation, complete the photo taking and saving.

[0128] After the photo is taken, the controller 50 controls the linear motor feedback module 100 to output a long vibration of medium intensity (50ms, medium intensity) to notify the user that the photo has been taken. Then, the smart glasses automatically return to standby mode, the screen turns off, and the system enters low-power mode.

[0129] In the smart glasses and control method of this application, a non-contact rotation detection method using a knob structure 20 and a capacitive sensor within the knob structure 20 replaces the traditional mechanical encoder and Hall sensor. This eliminates mechanical wear and magnetic field dependence issues, improves detection accuracy and long-term reliability, and features a compact structure and small footprint, which is beneficial for meeting the design requirements of lightweight and miniaturized smart glasses. Furthermore, a first capacitive sensor 30 and a second capacitive sensor are integrated into the same knob structure 20, respectively realizing rotation angle detection and finger touch sensing. This results in high functional integration, eliminating the need for a separate touch component and saving installation space. In addition, a press trigger 22 is integrated into the knob structure 20, thereby combining the three interaction methods of rotation, touch, and press. This achieves a single-knob integration of multiple functions such as menu interaction, volume adjustment, and photo control, simplifying the operation process and improving capture efficiency.

[0130] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0131] The smart glasses and their control method provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the technical solutions and core ideas of this application. 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 of the technical features. These 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 type of smart glasses, characterized in that, The smart glasses include: The eyeglasses body includes a frame and temples rotatably connected to the frame. A knob structure is provided on the eyeglass frame or the temple. The knob structure includes a knob body, which includes a knob cap, a rotating shaft connected to the knob cap, and a rotating tray disposed on the rotating shaft. The knob cap is exposed on the outer side wall of the eyeglass body. The rotating shaft passes through the eyeglass body and extends into the receiving cavity of the eyeglass body. The rotating tray is located inside the receiving cavity and is fixedly connected to the rotating shaft. The first capacitive sensor includes a first detection electrode and a grounding conductive block. The first detection electrode is arranged in a ring shape in the receiving cavity and sleeved on the outer periphery of the rotating shaft. The grounding conductive block is located on the side of the rotating tray facing the first detection electrode and rotates synchronously with the rotating tray, so that a capacitance signal that changes with the rotation angle is generated between the detection electrode and the grounding conductive block.

2. The smart glasses according to claim 1, characterized in that, The first detection electrode includes: A first flexible substrate, the first flexible substrate having an annular region; A plurality of first sensing electrodes are disposed in the annular region; the plurality of first sensing electrodes are arranged at intervals along the circumference of the annular region. A plurality of second sensing electrodes are disposed in the annular region and arranged at intervals along the circumference; The first sensing electrode and the second sensing electrode are arranged alternately along the circumference of the annular region, and the first sensing electrode and the second sensing electrode are insulated from each other and spaced apart.

3. The smart glasses according to claim 2, characterized in that, The first flexible substrate has a conductive connection portion, which interconnects the first sensing electrodes.

4. The smart glasses according to claim 2, characterized in that, The second sensing electrode includes two second electrode blocks, which are arranged radially along the annular region and connected to each other to form a radially extending integral electrode.

5. The smart glasses according to any one of claims 1 to 4, characterized in that, The smart glasses also include a second capacitive sensor, which comprises: The second detection electrode plate is fixed to the end of the rotating shaft and located inside the receiving cavity; A signal transmission element is inserted into the rotating shaft. One end of the signal transmission element is connected to the knob cap to form a sensing end at the knob cap. The other end of the signal transmission element extends into the receiving cavity and is electrically connected to the second detection electrode plate.

6. The smart glasses according to claim 5, characterized in that, The second detection electrode plate includes a second flexible substrate; the second flexible substrate is provided with a third sensing electrode and a fourth sensing electrode located around the third sensing electrode, the third sensing electrode and the fourth sensing electrode are insulated from each other, and the third sensing electrode is electrically connected to the signal transmission device.

7. The smart glasses according to claim 5, characterized in that, The knob structure also includes a press trigger, which is disposed in the receiving cavity and is linked to the end of the rotating shaft located inside the receiving cavity. The rotating shaft is adapted to move axially to push the press trigger. The cavity contains a circuit board with a press-sensitive contact, and the press trigger corresponds to the press-sensitive contact.

8. The smart glasses according to claim 1, characterized in that, The knob structure also includes a damping element, which is disposed on the rotation axis and configured to generate damping during the rotation of the knob structure.

9. The smart glasses according to claim 1, characterized in that, The smart glasses also include a retaining spring. The rotating shaft has a retaining groove, and the retaining spring is engaged in the retaining groove. The retaining spring is located in the receiving cavity and abuts against the inner wall of the glasses body to prevent the knob from detaching from the glasses body axially.

10. A control method for smart glasses, characterized in that, The control method for the smart glasses is applied to the smart glasses as described in any one of claims 1 to 9, and the control method includes: The capacitance change caused by the rotation of the knob structure is obtained by the first capacitance sensor; The angular position information of the knob structure is determined based on the capacitance change value; The motion information of the knob structure is determined based on at least two consecutive angular position information. Obtain the control command corresponding to the motion information and execute the control command.

11. The control method for smart glasses according to claim 10, characterized in that, The step of determining the motion information of the knob structure based on at least two consecutive angular position information includes: Determine the direction and amount of change of at least two consecutive angular position information; The rotation direction of the knob structure is determined according to the direction of change, and the rotation direction includes a counterclockwise direction or a clockwise direction; The rotational speed of the knob structure is determined based on the change and the time interval between the two angular position information.

12. The control method for smart glasses according to claim 11, characterized in that, Following the step of determining the rotational speed of the knob structure, the method further includes: The angular acceleration of the knob structure is calculated based on the change in rotational speed determined at multiple consecutive time points and the time interval.

13. The control method for smart glasses according to claim 12, characterized in that, The smart glasses include a display module, and the step of acquiring the control command corresponding to the motion information includes: When the rotation direction is clockwise, a control command is generated to move the display screen in the display module along the first direction.

14. The control method for smart glasses according to claim 13, characterized in that, The step of acquiring the control command corresponding to the motion information includes: When the rotation direction is clockwise, a control command to increase the volume is generated.

15. The control method for smart glasses according to claim 14, characterized in that, The control method further includes: When the angular acceleration is positive, a control command is generated to control the display screen to accelerate its rotation; when the angular acceleration is negative, a control command is generated to control the display screen to decelerate its rotation.

16. A control method for smart glasses, characterized in that, The control method for the smart glasses is applied to the smart glasses as described in any one of claims 5 to 7, the control method comprising: The sensing signal of the knob structure is obtained through the second capacitive sensor; Obtain the control command corresponding to the sensing signal and execute the control command.

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