Wearable device and antenna control method

Abstract

The invention relates to the technical field of virtual reality, in particular to wearable equipment and an antenna control method. The wearable device comprises a handle and a head-mounted display, the head-mounted display comprises a first antenna, the first antenna comprises a first feeding point and a second feeding point, the handle comprises a second antenna, and the second antenna comprises a third feeding point and a fourth feeding point, the first antenna generates a first target directional diagram when feeding is carried out through a first target feeding point in the first feeding point and the second feeding point; the second antenna generates a second target directional diagram when feeding is carried out through a second target feeding point in the third feeding point and the fourth feeding point; the antenna radiation range indicated by the first target pattern is at least partially overlapped with the antenna radiation range indicated by the second target pattern. Therefore, the directional diagram of the head-mounted display can be aligned with the antenna directional diagram of the handle, so that good communication quality can be kept between the head-mounted display and the handle.

Description

Technical Field

[0001] The present application relates to the field of virtual reality technology, and in particular to a wearable device and an antenna control method. Background Art

[0002] Wearable devices such as virtual reality (VR) and mixed reality (MR) typically include a head-mounted display (HMD) and a controller. Wireless communication between the controller and HMD uses Bluetooth low energy (BLE) to achieve lower latency. When using VR / MR wearable devices, arm and hand movements can cause the relative position between the HMD and controller to change, which can degrade the wireless connection between the controller and HMD and affect the BLE signal quality between the controller and HMD. Summary of the Invention

[0003] To solve the above problems, embodiments of the present application provide a wearable device and an antenna control method.

[0004] In the first aspect, the present application provides a wearable device comprising a handle and a head-mounted display, the head-mounted display comprising a first antenna, the first antenna comprising a first feeding point and a second feeding point, the handle comprising a second antenna, the second antenna comprising a third feeding point and a fourth feeding point, wherein the first antenna generates a first target radiation pattern when fed through a first target feeding point among the first feeding point and the second feeding point; the second antenna generates a second target radiation pattern when fed through a second target feeding point among the third feeding point and the fourth feeding point; the antenna radiation range indicated by the first target radiation pattern at least partially overlaps with the antenna radiation range indicated by the second target radiation pattern.

[0005] In the present application, the first antenna may be the BLE antenna 1011 mentioned later, the first feeding point may be the feeding point A1 mentioned later, and the second feeding point may be the feeding point A2 mentioned later; the second antenna may be the BLE antenna 1021 on the left-hand handle or the BLE antenna 1031 on the right-hand handle mentioned later, the third feeding point may be the feeding point B1 mentioned later, and the fourth feeding point may be the feeding point B2 mentioned later. When the first target feeding point is feeding point A1 and the second target feeding point is feeding point B1, the first target radiation pattern generated when the first antenna is fed through the first target feeding point may be the radiation pattern A11 mentioned later, and the second target radiation pattern generated when the second antenna is fed through the second target feeding point may be the radiation pattern B11 mentioned later.

[0006] In the embodiment of the present application, the fact that the antenna radiation range indicated by the first target direction pattern and the antenna radiation range indicated by the second target direction pattern at least partially overlap indicates that the first target direction pattern is aligned with the second target direction pattern.

[0007] It can be understood that when two antennas communicate, if the directional patterns of the two antennas are aligned, the communication between the antennas can achieve lower link loss and higher signal quality; if the directional patterns of the two antennas cannot be aligned (i.e., mismatched), the link loss of the communication between the antennas increases, resulting in deterioration of the signal quality and inability to communicate normally.

[0008] In this way, the wearable device controls the first antenna of the head-mounted display to be fed through the first target feeding point, and controls the second antenna of the handle to be fed through the second target feeding point, so that the directional pattern of the head-mounted display and the antenna directional pattern of the handle are aligned, thereby maintaining good communication quality between the head-mounted display and the handle.

[0009] In a possible implementation of the first aspect above, the wearable device uses six-degree-of-freedom positioning information of the head-mounted display and the handle to determine the first target feeding point and the second target feeding point, wherein the six-degree-of-freedom positioning information includes relative position information and rotation angle information.

[0010] In this application, wearable devices can use technologies such as six-degree-of-freedom (6DoF) three-dimensional magnetic positioning to obtain 6DoF positioning information of the head display and the controller, thereby realizing the real-time mutual positioning function between the head display and the controller. Among them, the six degrees of freedom (6DoF) include six degrees of freedom, namely three translational degrees of freedom and three rotational degrees of freedom. The translational degrees of freedom include forward and backward, left and right, and up and down movement, and the rotational degrees of freedom include rotation around the X-axis, Y-axis, and Z-axis.

[0011] In some embodiments, the wearable device may also determine the movement trend of the head-mounted display or the handle based on the six-degree-of-freedom positioning information, thereby determining the first target feeding point and the second target feeding point.

[0012] In a possible implementation of the first aspect, the head-mounted display and the handle are respectively provided with positioning modules, and the positioning modules determine six-degree-of-freedom positioning information of the head-mounted display and the handle based on electromagnetic signals.

[0013] In an embodiment of the present application, the positioning module set on the head-mounted display may be the head-mounted display positioning module mentioned later, the positioning module set on the handle may be the handle positioning module mentioned later, and the 6Dof positioning module mentioned in this application may include a head-mounted display positioning module and a handle positioning module.

[0014] In a possible implementation of the first aspect above, the handle includes a first positioning module, which includes a signal generator, a digital-to-analog conversion unit, a switch unit, a first signal amplification unit, and a three-axis transmitting coil connected in sequence; wherein the signal generator is used to send an electromagnetic signal, and the electromagnetic signal passes through the digital-to-analog conversion unit, the switch unit, and the first signal amplification unit in sequence, and is transmitted by the three-axis transmitting coil.

[0015] In the present application, the first positioning module may be the positioning module 5011 mentioned later.

[0016] In a possible implementation of the first aspect above, the head-mounted display includes a second positioning module, which includes an analog-to-digital conversion unit, a second signal amplification unit, and a three-axis receiving coil connected in sequence; wherein the three-axis receiving coil is used to detect the induced electromotive force generated by the electromagnetic signal, and the induced electromotive force is sequentially processed by the second signal amplification unit and the analog-to-digital conversion unit to determine the six-degree-of-freedom positioning information of the head-mounted display and the handle.

[0017] In the present application, the second positioning module may be the positioning module 5012 mentioned later.

[0018] In a possible implementation of the first aspect above, the head-mounted display includes a first positioning module, which includes a signal generator, a digital-to-analog conversion unit, a switch unit, a first signal amplification unit, and a three-axis transmitting coil connected in sequence; wherein the signal generator is used to send an electromagnetic signal, and the electromagnetic signal passes through the digital-to-analog conversion unit, the switch unit, and the first signal amplification unit in sequence, and is transmitted by the three-axis transmitting coil.

[0019] In a possible implementation of the first aspect above, the handle includes a second positioning module, which includes an analog-to-digital conversion unit, a second signal amplification unit, and a three-axis receiving coil connected in sequence; wherein the three-axis receiving coil is used to detect the induced electromotive force generated by the electromagnetic signal, and the induced electromotive force is sequentially processed by the second signal amplification unit and the analog-to-digital conversion unit to determine the six-degree-of-freedom positioning information of the head-mounted display and the handle.

[0020] It can be understood that when the head-mounted display includes a second positioning module and the handle includes a first positioning module, the wearable device can realize the positioning of the head-mounted display relative to the handle; when the head-mounted display includes a first positioning module and the handle includes a second positioning module, the wearable device can realize the positioning of the head-mounted display relative to the handle; when the head-mounted display and the handle both include the first positioning module and the second positioning module, the wearable device can realize the mutual positioning of the head-mounted display and the handle.

[0021] In a possible implementation of the first aspect, the electromagnetic signal is a periodic signal, and at least two periodic signals in the electromagnetic signal have different amplitudes.

[0022] It is understood that when the electromagnetic signal is periodic, the transmission power consumption of the positioning module can be reduced. For example, within a period of time T, an electromagnetic signal with a constant amplitude can be transmitted during the first T / 2 seconds, and no electromagnetic signal can be transmitted during the last T / 2 seconds, thereby reducing the power consumption of the positioning module.

[0023] In an embodiment of the present application, the amplitude of the electromagnetic signal can be adjusted according to the distance between the handle and the head-mounted display. When the distance between the handle and the head-mounted display is different, the amplitude of the periodic signal in the electromagnetic signal corresponding to the distance is also different.

[0024] In a possible implementation of the first aspect, each periodic signal in the electromagnetic signal has a prefix signal, and the prefix signal of each periodic signal has the same amplitude and frequency as the periodic signal.

[0025] In this embodiment of the present application, the positioning module can encode electromagnetic signals of different amplitudes. For example, a short prefix signal of the same frequency and amplitude is sent before each periodic signal. Because the prefix signal of each periodic signal has the same amplitude and frequency as the periodic signal, the amplitude of the periodic signal following the prefix signal can be determined based on the amplitude of the prefix signal.

[0026] In a possible implementation of the first aspect above, the amplitude of the first periodic signal in the above electromagnetic signal is greater than the amplitude of the second periodic signal, and the first periodic signal has a first prefix signal, and the second periodic signal has a second prefix signal, wherein the time interval between the first prefix signal and the first periodic signal is less than the time interval between the second prefix signal and the second periodic signal.

[0027] In an embodiment of the present application, the first periodic signal may be an electromagnetic signal in the signal shown in the T2 part mentioned later, and the first prefix signal may be a prefix signal in the signal shown in the T2 part mentioned later; the second periodic signal may be an electromagnetic signal in the signal shown in the T1 part mentioned later, and the second prefix signal may be a prefix signal in the signal shown in the T1 part mentioned later.

[0028] In this way, by adjusting the amplitude of the electromagnetic signal according to the distance between the handle and the head-mounted display and encoding different signal amplitudes, the power consumption of the positioning module can be reduced without affecting the positioning accuracy.

[0029] In a possible implementation of the first aspect above, the first antenna generates a first radiation pattern when fed through a first feeding point, and generates a second radiation pattern when fed through a second feeding point; the antenna radiation range indicated by the first radiation pattern and the antenna radiation range indicated by the second radiation pattern at least partially do not overlap.

[0030] In the present application, the first directional pattern generated when the first antenna is fed through the first feeding point may be directional pattern A11, and the second directional pattern generated when the first antenna is fed through the second feeding point may be directional pattern A21.

[0031] It can be understood that the fact that the antenna radiation range indicated by the first directional pattern and the antenna radiation range indicated by the second directional pattern at least partially do not overlap indicates that the first directional pattern and the second directional pattern are complementary.

[0032] In a possible implementation of the first aspect above, a third directional pattern is generated when the second antenna is fed through a third feeding point, and a fourth directional pattern is generated when the second antenna is fed through a fourth feeding point; the antenna radiation range indicated by the third directional pattern and the antenna radiation range indicated by the fourth directional pattern at least partially do not overlap.

[0033] In the present application, the third directional pattern generated when the second antenna is fed through the third feeding point may be the directional pattern B11, and the fourth directional pattern generated when the second antenna is fed through the fourth feeding point may be the directional pattern B21.

[0034] It can be understood that the fact that the antenna radiation range indicated by the third directional pattern and the antenna radiation range indicated by the fourth directional pattern at least partially do not overlap indicates that the third directional pattern and the fourth directional pattern are complementary.

[0035] In a second aspect, the present application provides an antenna control method, which is applied to a wearable device, the wearable device including a handle and a head-mounted display, the head-mounted display including a first antenna, the first antenna including a first feeding point and a second feeding point, the handle including a second antenna, the second antenna including a third feeding point and a fourth feeding point, the method comprising: determining a first target feeding point from the first feeding point and the second feeding point, and determining a second target feeding point from the third feeding point and the fourth feeding point; controlling the first antenna to be fed through the first target feeding point, and controlling the second antenna to be fed through the second target feeding point;

[0036] The first antenna generates a first target pattern when fed through a first target feeding point, and the second antenna generates a second target pattern when fed through a second target feeding point. The antenna radiation range indicated by the first target pattern at least partially overlaps with the antenna radiation range indicated by the second target pattern.

[0037] In a possible implementation of the second aspect above, determining the first target feeding point from the first feeding point and the second feeding point, and determining the second target feeding point from the third feeding point and the fourth feeding point, includes: determining the first target feeding point and the second target feeding point based on six-degree-of-freedom positioning information of the head-mounted display and the handle, where the six-degree-of-freedom positioning information includes relative position information and rotation angle information.

[0038] In a possible implementation of the second aspect above, the method further includes: determining six-degree-of-freedom positioning information of the head-mounted display and the handle based on an electromagnetic signal between the head-mounted display and the handle.

[0039] In a possible implementation of the second aspect, the electromagnetic signal is a periodic signal, and at least two periodic signals in the electromagnetic signal have different amplitudes.

[0040] In a possible implementation of the second aspect, each periodic signal in the electromagnetic signal has a prefix signal, and the prefix signal of each periodic signal has the same amplitude and frequency as the periodic signal.

[0041] In a possible implementation of the second aspect above, the amplitude of the first periodic signal in the above-mentioned electromagnetic signal is greater than the amplitude of the second periodic signal, and the first period has a first prefix signal and the second period has a second prefix signal, wherein the time interval between the first prefix signal and the first periodic signal is less than the time interval between the second prefix signal and the second periodic signal.

[0042] For the beneficial effects of the second aspect mentioned above, reference can be made to the relevant descriptions in the first aspect and various possible implementations of the first aspect, and no further details will be given here. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 A schematic diagram of a wearable device 10 provided in an embodiment of the present application is shown;

[0044] Figure 2 A schematic diagram of an antenna structure of a wearable device 20 provided in an embodiment of the present application is shown;

[0045] Figure 3 Schematic diagram of the antenna structure of another wearable device 30 provided in an embodiment of the present application is shown;

[0046] Figure 4A A schematic diagram of a scenario in which an arm is swung to the opposite side (i.e., a handle is swung from one side of the head-mounted display to the other side) provided in an embodiment of the present application is shown;

[0047] Figure 4B A schematic diagram of a scenario in which an arm is swung behind the head (i.e., the handle is on the back of the head display) provided in an embodiment of the present application is shown;

[0048] Figure 4C A schematic diagram of a scene of human hand rotation (i.e., handle rotation) provided in an embodiment of the present application is shown;

[0049] Figure 5A This invention provides a method for Figure 4A A schematic diagram of the antenna pattern of the wearable device 20 in the illustrated scenario;

[0050] Figure 5B This invention provides a method for Figure 4B A schematic diagram of the antenna pattern of the wearable device 20 in the illustrated scenario;

[0051] Figure 5C This invention provides a method for Figure 4C A schematic diagram of the antenna pattern of the wearable device 20 in the illustrated scenario;

[0052] Figure 6 A schematic diagram showing an antenna pattern of a wearable device 10 provided in an embodiment of the present application is shown;

[0053] Figure 7 The system architecture of a wearable device 10 provided in an embodiment of the present application is shown;

[0054] Figure 8A A schematic diagram of a positioning module 5011 provided in an embodiment of the present application is shown;

[0055] Figure 8B A schematic diagram of a positioning module 5012 provided in an embodiment of the present application is shown;

[0056] Figure 9 A schematic diagram of an electromagnetic signal provided by an embodiment of the present application is shown;

[0057] Figure 10 A schematic diagram of a radio frequency path in a wearable device 10 provided in an embodiment of the present application is shown;

[0058] Figure 11A A schematic diagram of a head-mounted display in a wearable device 10 provided in an embodiment of the present application is shown;

[0059] Figure 11B A schematic diagram of a BLE antenna pattern for a head-mounted display in a wearable device 10 provided in an embodiment of the present application is shown;

[0060] Figure 11C A schematic diagram of a handle in a wearable device 10 provided in an embodiment of the present application is shown;

[0061] Figure 11D A schematic diagram of a BLE antenna pattern of a handle in a wearable device 10 provided in an embodiment of the present application is shown;

[0062] Figure 12 A schematic diagram of a flow chart of an antenna control method provided in an embodiment of the present application is shown;

[0063] Figure 13A This invention provides a method for Figure 4A A schematic diagram of the antenna pattern of the wearable device 10 in the illustrated scenario;

[0064] Figure 13B This invention provides a method for Figure 4A Schematic diagram of communication gain of the wearable device 10 in the scenario shown;

[0065] Figure 14A This invention provides a method for Figure 4B A schematic diagram of the antenna pattern of the wearable device 10 in the illustrated scenario;

[0066] Figure 14B This invention provides a method for Figure 4B Schematic diagram of communication gain of the wearable device 10 in the scenario shown;

[0067] Figure 15A This invention provides a method for Figure 4C A schematic diagram of the antenna pattern of the wearable device 10 in the illustrated scenario;

[0068] Figure 15B This invention provides a method for Figure 4C Schematic diagram of the communication gain of the wearable device 10 in the scenario shown. DETAILED DESCRIPTION

[0069] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0070] Reference Figure 1 , Figure 11 is a schematic diagram of a wearable device 10 provided in an embodiment of the present application. The wearable device 10 includes a head-mounted display (HMD) 101, a left-hand handle 102, and a right-hand handle 103. The HMD 101 includes a BLE antenna 1011, the left-hand handle 102 includes a BLE antenna 1021, and the right-hand handle 103 includes a BLE antenna 1031. The operating frequency of the antenna 1011 is in the 2.4 GHz band. The HMD 101 also includes a wireless fidelity (Wi-Fi) antenna 1012, and the operating frequency of the Wi-Fi antenna 1012 also includes the 2.4 GHz band. Therefore, there is a co-frequency coexistence scenario between the Wi-Fi antenna 1012 and the BLE antenna 1011, that is, a scenario in which the Wi-Fi antenna 1012 and the BLE antenna 1011 operate simultaneously. Furthermore, due to the size limitations of the headset 101, the Wi-Fi antenna 1012 is relatively close to the BLE antenna 1011, causing significant co-channel interference with the communication of the BLE antenna 1011. Furthermore, the headset 101 includes cameras with different functions. When the headset 101 is in use, each camera remains powered on, generating interference within the operating frequency band of the BLE antenna 1011, increasing the noise floor and impacting the communication of the BLE antenna 1011. To reduce interference from the co-channel antenna and cameras, the signal quality of the BLE communication between the controller and the headset needs to be maximized to ensure a demodulation threshold signal-to-noise ratio (SNR) that ensures normal communication between the controller and the headset.

[0071] In some embodiments, as Figure 2 As shown, the wearable device 20 includes a head-mounted display (HMD) 201, a left-hand handle 202, and a right-hand handle 203. Each of the HMD 201, the left-hand handle 202, and the right-hand handle 203 utilizes a single BLE chip and single BLE antenna architecture. For example, the HMD 201 includes a BLE chip 2011 and a BLE antenna 2012, the left-hand handle 202 includes a BLE chip 2021 and a BLE antenna 2022, and the right-hand handle 203 includes a BLE chip 2031 and a BLE antenna 2032. The BLE antenna 2012 is generally located in the middle of the HMD 201 and communicates with the BLE antennas 2022 and 2032 of the left and right handles, respectively, through time slot switching.

[0072] In other embodiments, Figure 3As shown, the wearable device 30 includes a head-mounted display (HMD) 301, a left-hand handle 302, and a right-hand handle 303. The HMD 301 utilizes a single BLE chip and dual BLE antenna architecture, while the left-hand handles 302 and right-hand handles 303 utilize a single BLE chip and single BLE antenna architecture. For example, the HMD 301 includes a BLE chip 3011, a BLE antenna 3012, a BLE antenna 3013, and a switch 3014. The left-hand handle 302 includes a BLE chip 3021 and a BLE antenna 3022. The right-hand handle 303 includes a BLE chip 3031 and a BLE antenna 3032. The BLE antennas 3012 and 3013 are located on the left and right sides of the HMD 301, respectively, with antenna switching achieved via a switch 3014. The BLE antenna 3012 on the left side of the HMD communicates with the BLE antenna 3022 on the left handle, while the BLE antenna 3013 on the right side of the HMD communicates with the BLE antenna 3032 on the right handle.

[0073] It is understood that antennas have directivity, that is, the ability of antennas to radiate or receive electromagnetic waves in specific directions is different. The antenna pattern is a diagram used to represent the directivity of the antenna. The antenna pattern can reflect the radiation range of the antenna. When the directivity patterns of two antennas are aligned, the connection performance of the two antennas is better and the link loss is smaller. Figure 2 , the head display BLE antenna 2012 has a directional pattern 201a, the BLE antenna 2022 on the left handle has a directional pattern 202a, and the BLE antenna 2032 on the right handle has a directional pattern 203a. Figure 3 , the BLE antenna 3012 of the head display has a directional pattern 301a, the BLE antenna 3013 has a directional pattern 301b, the BLE antenna 3022 on the left handle has a directional pattern 302a, and the BLE antenna 3032 on the right handle has a directional pattern 303a.

[0074] like Figure 2 and Figure 3 As shown in the figure, when the user holds the left and right handles on both sides of the body and remains motionless, the directional pattern of the headset antenna is aligned with the directional pattern of the handle antenna. At this time, the connection between the headset and the arm is relatively stable. However, when the user uses the handle, the movement of the arm and the hand will cause the relative position between the headset and the handle to change. For example, the left handle moves to the right side of the body. The change in relative position will cause the directional pattern of the headset and the handle to mismatch, thereby causing the wireless connection between the handle and the headset to deteriorate, affecting the BLE antenna signal quality between the handle and the headset.

[0075] Below Figure 2 Taking the wearable device 20 shown as an example, the reasons for the deterioration of the wireless connection between the head display and the handle are explained in combination with specific scenarios.

[0076] To facilitate subsequent description, the directions indicated by the coordinate diagrams in the various figures of this application are first explained. In the various figures of this application, the X-axis direction represents the direction from the left side to the right side of the human body, the Y-axis direction represents the direction from the back side to the front side of the human body, and the Z-axis direction represents the direction from the feet to the head of the human body. The X-axis direction, the Y-axis direction, and the Z-axis direction can be perpendicular to each other.

[0077] like Figure 4A and Figure 5A As shown, in the scenario where the arm is swung to the opposite side (i.e., the handle is swung from one side of the headset to the other), taking the left-hand handle as an example, when the left-hand handle 202 moves to the right side of the headset 201, the BLE antenna 2022 of the left-hand handle 202 moves from the area where X<0 (e.g., the left side of the human body) to the area where X>0 (e.g., the right side of the human body), and the BLE antenna pattern 202a of the left-hand handle 202 remains unchanged and still points to the upper right area, while the BLE antenna pattern 201a of the headset 201 points to the lower left to lower right area. As a result, the BLE antenna patterns of the headset 201 and the handle 202 may be misaligned. At this time, the communication between the headset 201 and the left-hand handle 202 will experience large transmission loss, resulting in a deterioration in the signal-to-noise ratio, and then the handle will become stuck or disconnected, affecting the user experience.

[0078] like Figure 4B and Figure 5B As shown, in the scenario where the arm is swung behind the head (i.e., the handle is behind the headset), taking the right handle as an example, when the right handle 203 moves to the back of the headset 201, the BLE antenna 2032 of the right handle 203 moves from the area Y>0 to the area Y<0, and the BLE antenna pattern 203a of the right handle 203 remains unchanged, pointing to the upper left area in the figure, while the BLE antenna pattern 201a of the headset 201 points to the lower right area, so that the BLE antenna patterns of the headset 201 and the right handle 203 cannot be aligned, and the communication will have a large transmission loss, resulting in a deterioration of the signal-to-noise ratio, and then the handle will be stuck or disconnected, affecting the user experience.

[0079] like Figure 4C and Figure 5C As shown, in the scenario where the human hand rotates (i.e., the handle rotates), taking the left-hand handle as an example, the BLE antenna pattern 202a of the left-hand handle 202 points to the upper right area in the figure. When the human hand rotates, the BLE antenna pattern 202a of the left-hand handle 202 rotates to the right and points to the right area, while the BLE antenna pattern 201a of the head display 201 points to the lower left to lower right area. Therefore, the BLE antenna pattern 202a of the left-hand handle 202 and the BLE antenna pattern 201a of the head display 201 cannot be aligned, resulting in a large signal transmission loss, causing the signal-to-noise ratio to deteriorate, and then the handle will become stuck or disconnected, affecting the user experience.

[0080] To solve the above problems, an embodiment of the present application provides a wearable device, which includes a handle and a head display. Both the head display and the handle adopt a multi-feed single antenna. A multi-feed single antenna refers to a single antenna with at least two feeding points. At the same time, the antenna can be fed by any one of the at least two feeding points to realize signal transmission and reception. Since different feeding points can stimulate different current modes, the antenna has different antenna patterns in different current modes. For example, you can refer to Figure 6 , the head display BLE antenna 1011 has a feeding point A1 and a feeding point A2. When the antenna 1011 is fed through the feeding point A1, it can excite current mode 1. Under the current mode 1, the antenna 1011 has a directional pattern A11. When the antenna 1011 is fed through the feeding point A2, it can excite current mode 2. Under the current mode 2, the antenna 1011 has a directional pattern A21. Among them, the directional patterns A11 and A21 indicate that the antenna 1011 can radiate or receive electromagnetic waves in different directions. The directional patterns A11 and A21 are The radiation range indicated by the directional pattern A21 may not overlap at all, or at least partially; the handle BLE antenna 1021 has a feeding point B1 and a feeding point B2. When the antenna 1021 is fed through the feeding point B1, it can excite a current mode 3. Under the current mode 3, the antenna 1021 has a directional pattern B11. When the antenna 1021 is fed through the feeding point B2, it can excite a current mode 4. Under the current mode 4, the antenna 1021 corresponds to the directional pattern B21, and the directional pattern B11 and the directional pattern B21 complement each other. Therefore, the wearable device can detect the relative position relationship between the handle and the head display, and adjust the feeding point of the antenna in the head display and / or the handle according to the relative position relationship, so that the antenna directional patterns of the head display and the handle can be kept aligned. For example, in a case such as Figure 4A In the scenario shown, where the arm swings to the opposite side, if the controller BLE antenna 1021 moves from the region X < 0 to the region X > 0, the headset BLE antenna 1011 can be fed via feed point A2, and the controller BLE antenna 1021 can be fed via feed point B2, so that the headset's directional pattern A21 and the controller's directional pattern B21 remain aligned. This increases the probability of the HMD and controller's antenna patterns being aligned, maintaining good communication quality between the controller and the HMD as the user moves.

[0081] It can be understood that when two antennas communicate, if the directional patterns of the two antennas are aligned, the communication between the antennas can achieve lower link loss and higher signal quality; if the directional patterns of the two antennas cannot be aligned (i.e., mismatched), the link loss of the communication between the antennas increases, resulting in deterioration of the signal quality and inability to communicate normally.

[0082] In some embodiments, both the headset and controller can also utilize an antenna combination with a directional pattern adjustment function, such as a dual antenna, where the directional patterns of the antennas in the dual antennas are complementary. Here, complementary can mean that the directional patterns of the antennas radiate or receive electromagnetic waves in different directions, and the radiation ranges of the antennas can be completely non-overlapping, or at least partially non-overlapping. At the same time, the headset can select one of the dual antennas to communicate with one of the dual antennas in the controller. Therefore, the wearable device can adjust the antennas used in communication between the headset and the controller based on the relative position of the controller and the headset, so that the antenna directional patterns of the headset and the controller remain aligned.

[0083] As you can understand, the headset and controller use a single, multi-feed antenna, allowing for switching between different directional patterns. By selecting the feed point, the headset antenna or controller antenna can stimulate different antenna current patterns, thereby producing different directional patterns. Compared to adjusting the directional pattern by increasing the number of antennas to form antenna combinations, this approach is more conducive to the realization of lightweight wearable products and reduces costs.

[0084] In some embodiments, the wearable device can use technologies such as six-degree-of-freedom (6Dof) three-dimensional magnetic positioning to obtain 6Dof positioning information of the head display and the handle, and realize the function of real-time mutual positioning between the head display and the handle. Among them, 6Dof includes six degrees of freedom, namely three translational degrees of freedom and three rotational degrees of freedom. The translational degrees of freedom include forward and backward, left and right, and up and down movements, and the rotational degrees of freedom include rotation around the X-axis, Y-axis, and Z-axis. The 6Dof positioning information includes relative position information and rotation angle information. According to the 6Dof positioning information of the head display and the handle, a more intelligent switching of the antenna feed point between the head display and the handle can be realized, so that the antenna feed point combination between the head display and the handle can be realized as the optimal combination, thereby realizing real-time alignment of the directional pattern between the head display and the handle, and ensuring the quality of the BLE communication signal.

[0085] The following combination Figure 1 and Figure 7 The system architecture of a wearable device 10 provided in an embodiment of the present application is introduced. The system architecture of the wearable device 10 provided in an embodiment of the present application includes a six-degree-of-freedom (6Dof) positioning module 501, a main chip 502, a low-power Bluetooth system-on-chip (BLE SOC) 503, a radio frequency module 504, and an antenna module 505.

[0086] The 6Dof positioning module 501 is used to obtain 6Dof positioning information, including the 6Dof positioning information of the head display 101, the 6Dof positioning information of the left hand handle 102, and the 6Dof positioning information of the right hand handle 103. The 6Dof positioning module 501 will be described in detail below and will not be repeated here.

[0087] The main chip 502 is used to calculate the relative position information of the head display and the handle, as well as the rotation angle information of the head display and the handle based on the obtained 6Dof positioning information; and then determine whether to start the antenna switching of the head display and the handle based on the relative position information and the rotation angle information. Among them, the main chip 502 can be set on the head display. Alternatively, the main chip 502 can also be set on a host independent of the head display and the handle, and the host is connected to the head display and the handle via wireless or wired means. Alternatively, the number of main chips 502 can be multiple, for example, the main chip 502 can include a head display chip set on the head display and a handle chip set on the handle.

[0088] The BLE SOC 503 is used to transmit / receive BLE signals between the head display and the controller, and sends a feed point switching signal to the RF module 504 based on the judgment logic of the main chip 502. It can be understood that both the head display and the controller are equipped with the BLE SOC 503.

[0089] The RF module 504 is used to filter and amplify the BLE signal and switch the RF path to the corresponding feeding point according to the feeding point switching signal sent by the BLE SOC 503. It can be understood that both the head display and the controller are equipped with the RF module 504.

[0090] Antenna module 505 is used to transmit and receive BLE electromagnetic wave signals in space and has the function of switching antenna patterns. It can be understood that antenna module 505 includes a head display antenna and a handle antenna. In some embodiments, the head display antenna and the handle antenna can both be multi-feed single antennas.

[0091] It can be understood that the main chip 502 controls the BLE SOC 503 in the HMD to adjust the feed point of the HMD antenna based on the relative position of the HMD and the controller, thereby switching the HMD antenna pattern. Furthermore, the BLE SOC 503 in the controller can adjust the feed point of the controller antenna to switch the controller antenna pattern, ensuring that the HMD antenna pattern and the controller antenna pattern are always aligned.

[0092] The 6Dof positioning module 501 is described in detail below.

[0093] In this embodiment of the present application, the 6DoF positioning module 501 may include a controller positioning module and a head-mounted display positioning module. The following uses the example of achieving controller positioning with a head-mounted display to describe the structure of the controller positioning module and the head-mounted display positioning module, as well as the positioning principle between them. It will be understood that both the left and right controllers are equipped with the controller positioning module to achieve precise positioning of the left and right controllers with the head-mounted display.

[0094] Figure 8A: is a structural block diagram of a positioning module 5011 provided in an embodiment of the present application. In some embodiments, the handle positioning module includes the positioning module 5011. Figure 8A As shown, the positioning module 5011 may include a signal generator 601, a digital-to-analog converter 602, a switch unit 603, a signal amplification unit 604, and a three-axis transmitting coil 605, which are connected in sequence. Signal generator 601 is a low-frequency signal generator. The low-frequency electromagnetic signal sent by signal generator 601 passes through the digital-to-analog converter 602, the switch unit 603, and the signal amplification unit 604 in sequence before being transmitted by the three-axis transmitting coil 605 and received by the head-mounted display positioning module to achieve positioning of the controller. Specifically, the digital-to-analog converter 602 includes three digital-to-analog converters, the switch unit 603 includes three switches, and the signal amplification unit 604 includes three signal amplifiers. The three-axis transmitting coil 605 includes a non-metallic cubic structure and three metal coils, namely, metal coil X, metal coil Y, and metal coil Z. Metal coils X, Y, and Z are located on the X, Y, and Z faces of the non-metallic cubic structure, respectively. The aforementioned digital-to-analog converter, switch, and signal amplifier are provided between each of the metal coils X, Y, and Z and the signal generator 601. Signal generator 601 transmits a low-frequency electromagnetic signal to each digital-to-analog converter in the digital-to-analog conversion unit 602. The signal frequency can be in the range of 30 kHz to 150 kHz, and the frequencies of the electromagnetic signals transmitted to each digital-to-analog converter can be the same or different.

[0095] Figure 8B 5012 is a structural block diagram of a positioning module 5012 provided in an embodiment of the present application. In some embodiments, the head display positioning module includes the positioning module 5012. Figure 8B As shown, in this embodiment of the present application, the positioning module 5012 is connected to the main chip 502. The positioning module 5012 includes an analog-to-digital conversion unit 701, a signal amplification unit 702, and a three-axis receiving coil 703, which are connected in sequence. The analog-to-digital conversion unit 701 includes three analog-to-digital converters, the signal amplification unit 702 includes three signal amplifiers, and the three-axis receiving coil 703 includes a non-metallic cubic structure and three metal coils, namely, metal coil X, metal coil Y, and metal coil Z. Metal coil X, metal coil Y, and metal coil Z are respectively located on the X, Y, and Z faces of the non-metallic cubic structure. Each of the metal coils in metal coil X, metal coil Y, and metal coil Z is provided with the aforementioned analog-to-digital converter and signal amplifier between itself and the main chip 502. The three-axis receiving coil 703 can sense the electromagnetic signal emitted by the positioning module 5011 and generate an induced electromotive force. The three-axis receiving coil 703 sends the induced electromotive force to the main chip 502 through the signal amplification unit 702 and the analog-to-digital conversion unit 701 in sequence, and the main chip 502 calculates the relative position information and rotation angle information of the head display and the handle.

[0096] It is understood that in other embodiments, the handle positioning module may include Figure 8B The positioning module 5012 shown, the head display positioning module may include Figure 8A The positioning module 5011 shown, in this way, the low-frequency signal sent by the head display positioning module can be collected by the handle positioning module, thereby realizing the positioning of the head display by the handle.

[0097] It can be understood that in other embodiments, the handle positioning module includes a positioning module 5011 and a positioning module 5012, and the head display positioning module includes a positioning module 5011 and a positioning module 5012, so that the head display and the handle can be positioned relative to each other.

[0098] In some embodiments, the 6Dof positioning module 501 may include a signal generator, a digital-to-analog conversion unit, a switch unit, a signal amplification unit, a three-axis transmitting coil, an analog-to-digital conversion unit, a signal amplification unit, and a function switch. The function switch can be used to control the 6Dof positioning module 501 to implement the functions of the positioning module 5011 or the positioning module 5012 described above. Both the headset and the controller can be equipped with the 6Dof positioning module 501. Using the function switch, the headset can position the controller, the controller can position the headset, or the headset and controller can position each other.

[0099] Continue to refer to Figure 8A In some embodiments, taking the electromagnetic signal transmitted by the signal generator 601 to any digital-to-analog converter as an example, the waveform of the electromagnetic signal can be referred to Figure 9 (1) in . Figure 9 As shown in (1), the electromagnetic signal emitted by the signal generator 601 is a continuous signal, and the signal strength (amplitude) is constant, which may cause the transmission power consumption of the positioning module 5011 to be relatively high.

[0100] Based on this, in other embodiments, the electromagnetic signal emitted by the signal generator 601 is adjusted to a periodic signal, such as Figure 9 As shown in (2), within the cycle time T, an electromagnetic signal with a constant amplitude is transmitted during the first T / 2 time, and no electromagnetic signal is transmitted during the last T / 2 time. In this way, the transmission power consumption of the positioning module 5011 can be reduced.

[0101] Furthermore, considering that the electromagnetic signal detected by the positioning module 5012 is inversely proportional to the cube of the distance between the positioning module 5011 and the positioning module 5012, when the distance between the handle and the head display is relatively close, the induced electromotive force generated by the positioning module 5012 will increase sharply, and even exceed the maximum value of the induced electromotive force of the positioning module 5012, which may cause data overflow and the positioning function to fail.

[0102] Based on this, in some embodiments, the amplitude of the electromagnetic signal emitted by the positioning module 5011 is adjusted according to the distance between the handle and the head display. Figure 9 As shown in (3), when the distance between the handle and the head display is relatively close, the amplitude of the transmitted electromagnetic signal is reduced (i.e., the signal shown in part T1); when the distance between the handle and the head display is relatively far, the amplitude of the transmitted electromagnetic signal is increased (i.e., the signal shown in part T2).

[0103] In order to enable the positioning module 5012 to promptly determine which electromagnetic signal emission amplitude of the positioning module 5011 corresponds to the sensed induced electromotive force, the embodiment of the present application also encodes different signal amplitudes. For example, a short prefix signal of the same frequency and amplitude is sent before each cycle of the electromagnetic signal. Figure 9 (4) in . Figure 9 As shown in (4), the signal marked by the black arrow is the aforementioned prefix signal. In the signal shown in part T1, the time interval between the prefix signal and the electromagnetic signal is set to be relatively large; in the signal shown in part T2, the time interval between the prefix signal and the electromagnetic signal is set to be relatively small. For example, when the amplitude is less than 500mV, the time interval can be set to 2ms; when the amplitude is greater than 500mV, the time interval can be set to 1ms. For another example, there is a one-to-one correspondence between the amplitude and the time interval, and the size of the time interval is determined according to the specific amplitude. In this way, the positioning module 5012 can determine the emission amplitude of the subsequent electromagnetic signal based on the time interval between the detected prefix signal and the subsequent electromagnetic signal. That is, when the time interval between the detected prefix signal and the subsequent electromagnetic signal is large, it is determined that the amplitude of the subsequent electromagnetic signal is relatively small; when the time interval between the detected prefix signal and the subsequent electromagnetic signal is small, it is determined that the amplitude of the subsequent electromagnetic signal is relatively large. In this way, the amplitude of the emitted electromagnetic signal is adjusted according to the distance between the head display and the handle, and different signal amplitudes are encoded, which can reduce the power consumption of the handle without affecting the positioning accuracy, and avoid the problem of positioning function failure caused by data overflow.

[0104] Reference Figure 10 , Figure 10 1 is a schematic diagram of the structure of the head display 101 provided in an embodiment of the present application. Among them, the BLE SOC 503 and the radio frequency module 504 constitute the BLE radio frequency circuit, which is used for BLE signal transmission, reception and antenna feed point selection.

[0105] As mentioned above, both the head display and the handle are provided with a BLE SOC 503 and a radio frequency module 504. Figure 10 The RF circuit in the headset is used to control the switching of the headset antenna feed point, and the RF circuit in the controller is used to control the switching of the controller antenna feed point. It can be understood that the RF principle of the headset and the controller is the same. The following is mainly based on Figure 10 This section describes the specific structure and working principle of the radio frequency circuit in the head-mounted display 101.

[0106] like Figure 10 As shown, the RF module 504 includes a filter 801, a double-pole double-throw (DPDT) switch 802, and a matching load 803. Among them, the filter 801 is used to filter the BLE signal sent by the BLE SOC 503 or the BLE signal received via the antenna. The DPDT switch 802 includes a port RFIN1, a port RFIN2, a port RFOUT1, and a port RFOUT2. A movable conductive knife plate is connected to the port RFIN1 and the port RFIN2 respectively. When the conductive knife plate at the port RFIN1 is connected to the port RFOUT1, one end of the DPDT switch 802 is connected to the filter 801, and the other end is connected to the feeding point A1 of the BLE antenna 1011. At this time, the BLE antenna 1011 is fed through the feeding point A1 to realize signal transmission and reception. When the conductive blade at port RFIN1 is connected to port RFOUT2, one end of DPDT switch 802 is connected to filter 801, and the other end is connected to feed point A2 of BLE antenna 1011. At this time, BLE antenna 1011 is fed through feed point A2, enabling signal transmission and reception. BLE SOC 503 outputs a feed point switching signal to DPDT switch 802 via its output port GPIO. After receiving the feed point switching signal, DPDT switch 802 moves the conductive blade to the corresponding position, completing the switching between feed points A1 and A2.

[0107] In some embodiments, the main chip 502 can be connected to the DPDT switch 802 in the RF module 504 and output a feeding point switching signal to the DPDT switch 802 through the output port GPIO to implement switching of the antenna feeding point.

[0108] The matching load 803 is set at the port RFOUT2 of the DPDT switch 802. When the conductive knife gate at the port RFIN1 is connected to the port RFOUT2, the BLE antenna 1011 is fed through the feeding point A2. At this time, the conductive knife gate at the port RFIN2 is connected to the port RFOUT1, and the feeding point A1 is grounded through the matching load 803. When the conductive knife gate at the port RFIN1 is connected to the port RFOUT1, the BLE antenna 1011 is fed through the feeding point A1, the conductive knife gate at the port RFIN2 is connected to the port RFOUT2, and the feeding point A2 is grounded through the matching load 803. The matching load 803 can reduce the echo and absorb energy to avoid the open circuit affecting the performance of the RF circuit. Specifically, the matching load 803 may include one or more resistors in series.

[0109] In some embodiments, the switch in the RF path can also be a single-pole double-throw (SPDT) switch. The SPDT switch includes a movable conductive blade, one end of which can be connected to the filter, and the other end has two ports, one port connected to the first feed point of the antenna module 505, and the other port connected to the second feed point of the antenna module 505. The RF path can control the movement of the conductive blade according to the feed point switching signal to complete the feed point switching. It can be understood that the matching load 803 is not required in this RF path.

[0110] In some embodiments, the BLE antenna 1011 on the head display 101, the BLE antenna 1021 on the left handle 102, and the BLE antenna 1031 on the right handle 103 are all dual-feed single antennas. Figures 11A-11D The antenna 1011 and the antenna 1031 are described in detail. Figure 11A is a front view of the head display 101, Figure 11B Schematic diagram of the head-mounted display antenna pattern. Figure 11C Shown are a side view and a top view of the right-hand handle 1031, Figure 11D Schematic diagram of the right-hand handle antenna pattern.

[0111] like Figure 11A As shown, the BLE antenna 1011 is located in the middle position below the head display PCB motherboard 001. There are two feeding points on the BLE antenna 1011, namely feeding point A1 and feeding point A2. Feeding point A1 is located in the middle position of the BLE antenna 1011, and there is a certain distance between feeding point A2 and feeding point A1. Figure 11B As shown, when antenna 1011 is fed through feed point A1, it produces pattern A11; when antenna 1011 is fed through feed point A2, it produces pattern A21. At the same time, BLE antenna 1011 can be fed from either feed point A1 or feed point A2. Because feed points A1 and A2 can stimulate different current patterns, pattern A11 from feed point A1 and pattern A21 from feed point A2 can complement each other.

[0112] It should be understood that the distance between feed point A2 and feed point A1 should ensure high isolation between feed point A2 and feed point A1, thereby achieving complementary directional pattern A11 of feed point A1 and directional pattern A21 of feed point A2. The distance between feed point A2 and feed point A1 is related to the length of the antenna in actual application, and this application does not limit the specific value of this distance.

[0113] It is understood that the BLE antenna 1011 can also be located elsewhere in the HMD, such as within the PCB 001. This requires sufficient space between the PCB 001 and the HMD housing for the BLE antenna 1011. The PCB 001 can be the same motherboard as the BLE SOC 503. Positioning the BLE antenna 1011 in the center below the HMD PCB 001 minimizes the distance to the controller's BLE antenna, making it the optimal choice.

[0114] like Figure 11C As shown, Figure 11C The left side in the middle is a side view of the right handle 1031. The BLE antenna 1031 is located above the PCB main board of the right handle. There are two feeding points, namely feeding point B1 and feeding point B2. Feeding point B1 is located in the middle position of the BLE antenna 1031. There is a certain distance between feeding point B2 and feeding point B1. Figure 11C The right side is a top view of the right handle 1031, and the BLE antenna 1031 is located on the left side of the PCB main board of the right handle. Figure 11D As shown, when antenna 1031 is fed through feed point B1, it produces pattern B11; when fed through feed point B2, it produces pattern B21. BLE antenna 1031 can be fed from either feed point B1 or feed point B2 at the same time. Because feed points B1 and B2 can stimulate different current patterns, pattern B11 from feed point B1 and pattern B21 from feed point B2 can complement each other.

[0115] It should be understood that the distance between feed point B2 and feed point B1 should ensure high isolation between feed point B2 and feed point B1, thereby achieving complementary directional pattern B11 of feed point B1 and directional pattern B21 of feed point B2. The distance between feed point B2 and feed point B1 is related to the length of the antenna in actual application, and this application does not limit the specific value of this distance.

[0116] It is understood that the BLE antenna 1031 can also be located at other locations on the handle. Figure 11C When the left side of the PCB motherboard is shown in the top view on the right, the distance to the headset BLE antenna 1011 is the shortest, which is the best choice.

[0117] It can be understood that for the left-hand handle, its BLE antenna is symmetrical with the BLE antenna of the right-hand handle, and can be located on the right side of the PCB main board in the top view of the left-hand handle. When the left-hand handle BLE antenna 1021 is located at this position, the distance between it and the head display BLE antenna 1011 is the shortest, which is the optimal choice.

[0118] In the above embodiment, the BLE antennas of the head display and the handle both adopt dual-fed single antennas. Among them, the resonant frequency of the BLE antenna in the handle is 2.4GHz-2.48GHz, adopts a 1 / 2 wavelength mode, has two feeding points, and the BLE antenna is set at the edge of the handle. The resonant frequency of the BLE antenna in the head display is 2.4GHz-2.48GHz, adopts a 1 / 2 wavelength mode, has two feeding points, and the BLE antenna is located in the middle of the head display. Both the handle antenna and the head display antenna can excite different current modes by selecting different antenna feeding points, thereby generating different directional patterns, making the antenna directional pattern more comprehensive. In addition, there is no need to achieve antenna directional pattern differences by adding antenna combinations with different radiation directions, which is conducive to the realization of lightweight products and can reduce costs.

[0119] It is understood that in other embodiments, the BLE antenna for the headset and controller can also be a single antenna with more than two feed points. Specifically, the antenna length can be adjusted according to the number of feed points to be implemented, so that the antenna can generate more different radiation patterns under more feed points, covering a wider radiation range and adapting to more complex wearable scenarios.

[0120] The above mainly introduces the hardware structure of the wearable device 10. Figure 12 A software solution for a wearable device 10 is introduced. The software solution includes an antenna control method. Taking the positioning of the left handle of the head display as an example, the antenna control method can be implemented by the main chip 502. Figure 12 As shown, the antenna control method provided in the embodiment of the present application includes the following steps:

[0121] S901: Turn on the device.

[0122] In the embodiment of the present application, after the main chip 502 detects that the wearable device 10 is turned on, it turns on the positioning function of the head display and the left-hand handle.

[0123] S902: The headset locates the handle position.

[0124] In an embodiment of the present application, the head display can obtain the 6Dof positioning information of the left-hand handle, and based on the 6Dof positioning information of the left-hand handle, calculate the relative position information between the head display and the left-hand handle and the rotation angle information of the left-hand handle.

[0125] It can be understood that in some embodiments, the handle can also locate the position of the headset by obtaining the 6Dof positioning information of the headset and calculating the relative position information of the headset and the handle and the rotation angle information of the headset based on the 6Dof positioning information of the headset, thereby completing the positioning of the headset by the handle.

[0126] S903: Determine whether feeding point switching is required according to the handle position.

[0127] In an embodiment of the present application, the head-mounted display can determine whether feeding point switching is required based on the position of the left-hand handle. When it is determined that the position of the left-hand handle is within the range of X < 0 and Y < 0, that is, the left-hand handle is located at the left rear of the human body, step S904 is executed; when it is determined that the position of the left-hand handle is within the range of X < 0 and Y > 0, that is, the left-hand handle is located at the left front of the human body, step S905 is executed; when it is determined that the position of the left-hand handle is within the range of X > 0 and Y > 0, that is, the left-hand handle is located at the right front of the human body, step S906 is executed; when it is determined that the position of the left-hand handle is within the range of X > 0 and Y < 0, that is, the left-hand handle is located at the right rear of the human body, step S907 is executed.

[0128] In some embodiments, the head-mounted display can determine the movement trend of the handle based on the 6Dof positioning information of the handle, and determine whether the feed point needs to be switched based on the movement trend of the handle. For example, when the head-mounted display determines based on the 6Dof positioning information of the left-hand handle that the left-hand handle has a trend of moving from the range of X<0 and Y>0 to the range of X<0 and Y<0, that is, a trend of moving from the left front of the human body to the left rear of the human body, step S904 is executed; when it is determined that the left-hand handle has a trend of moving from the range of X<0 and Y<0 to the range of X<0 and Y>0, that is, a trend of moving from the left rear of the human body to the left front of the human body, step S905 is executed; when it is determined that the left-hand handle has a trend of moving from the range of X<0 and Y>0 to the range of X>0 and Y>0, that is, a trend of moving from the left front of the human body to the right front of the human body, step S906 is executed.

[0129] S904: The HMD antenna switches to feed point A1, and the controller antenna switches to feed point B2.

[0130] In an embodiment of the present application, when the headset determines that the left-hand handle is located behind the left side of the human body, the headset antenna is switched to the feeding point A1, and the left-hand handle antenna is switched to the feeding point B2 to ensure that the headset BLE antenna radiation pattern is aligned with the left-hand handle BLE antenna radiation pattern.

[0131] It will be understood that if the headset's BLE antenna is being fed through feed point A1 when this step is executed, there is no need to switch the headset's BLE antenna's feed point; the left controller's BLE antenna feed point only needs to be switched to feed point B2. If the left controller's BLE antenna is being fed through feed point B2, there is no need to switch the left controller's BLE antenna's feed point; the headset's BLE antenna feed point only needs to be switched to feed point A1. If the headset's BLE antenna is being fed through feed point A1 and the left controller's BLE antenna is being fed through feed point B2, there is no need to switch the feed point; execute step S908.

[0132] S905: The HMD antenna switches to feed point A1, and the controller antenna switches to feed point B1.

[0133] In an embodiment of the present application, when the headset determines that the left-hand handle is located in the left front of the human body, the headset antenna is switched to the feeding point A1, and the left-hand handle antenna is switched to the feeding point B1 to ensure that the headset BLE antenna radiation pattern is aligned with the left-hand handle BLE antenna radiation pattern.

[0134] It will be understood that if the headset's BLE antenna is being fed through feed point A1 when this step is executed, there is no need to switch the headset's BLE antenna's feed point; the left controller's BLE antenna feed point only needs to be switched to feed point B1. If the left controller's BLE antenna is being fed through feed point B1, there is no need to switch the left controller's BLE antenna's feed point; the headset's BLE antenna feed point only needs to be switched to feed point A1. If the headset's BLE antenna is being fed through feed point A1 and the left controller's BLE antenna is being fed through feed point B1, there is no need to switch the feed point; execute step S908.

[0135] S906: The HMD antenna switches to feed point A2, and the controller antenna switches to feed point B2.

[0136] In an embodiment of the present application, when the headset determines that the left-hand handle is located in the right front of the human body, the headset antenna is switched to feed point A2, and the left-hand handle antenna is switched to feed point B2 to ensure that the headset BLE antenna radiation pattern is aligned with the left-hand handle BLE antenna radiation pattern.

[0137] It will be understood that if the headset's BLE antenna is being fed through feed point A2 when this step is executed, there is no need to switch the headset's BLE antenna's feed point; the left controller's BLE antenna feed point only needs to be switched to feed point B2. If the left controller's BLE antenna is being fed through feed point B2, there is no need to switch the left controller's BLE antenna's feed point; the headset's BLE antenna feed point only needs to be switched to feed point A2. If the headset's BLE antenna is being fed through feed point A2 and the left controller's BLE antenna is being fed through feed point B2, there is no need to switch the feed point; execute step S908.

[0138] S907: Error.

[0139] In the embodiment of the present application, when the head display determines that the left-hand handle is located behind the right side of the human body, it means that the head display has incorrectly positioned the left-hand handle and the positioning information of the left-hand handle needs to be re-acquired.

[0140] It is understandable that when users actually use wearable devices, the left-hand handle generally does not move to the right rear of the human body. This situation is not ergonomic. Therefore, when the headset determines that the left-hand handle is located behind the right of the human body, it will reposition the handle and refresh the position information of the left-hand handle.

[0141] S908: The head display locates the handle position (refresh).

[0142] In the embodiment of the present application, after the BLE antenna feed points of the head display and the handle are switched, the head display will reposition the left-hand handle and refresh the position information of the left-hand handle.

[0143] The following combination Figures 4A-4C and Figures 13A-15B The application scenarios of the wearable device 10 provided in the embodiment of the present application are introduced.

[0144] Reference Figure 4A , in the scenario where the arm swings to the opposite side (i.e. the handle swings from one side of the headset to the other), take the left handle swinging to the right side of the headset as an example, Figure 13A As shown, when the left controller is on the left side of the headset, the BLE antenna 1021 on the left controller is fed through feed point B1, and the headset BLE antenna 1011 is fed through feed point A1. At this time, the directional pattern B11 of feed point B1 is aligned with the directional pattern A11 of feed point A1. When the left controller moves to the right side of the headset, the headset detects the change in position of the left controller and switches the feed point of the headset BLE antenna to feed point A2, and the feed point of the BLE antenna on the left controller to feed point B2. At this time, the directional pattern A21 of feed point A2 is aligned with the directional pattern B21 of feed point B2. This ensures a better headset controller connection experience and ensures signal quality.

[0145] Reference Figure 13B , Figure 13B Figure 2 shows a schematic diagram of communication gain in a scenario where the arm swings to the opposite side. Figure 13B As shown, when the left handle is on the left side of the headset, it should be fed through the feeding point B1 to ensure that the directional pattern B11 of the feeding point B1 of the handle's BLE antenna is aligned with the directional pattern A11 of the feeding point A1 of the headset's BLE antenna.

[0146] When the left controller moves to the right side of the headset, the feed point needs to be switched. The controller's BLE antenna is switched from feed point B1 to feed point B2, and the headset's BLE antenna is switched from feed point A1 to feed point A2 to ensure that the headset's BLE antenna pattern A21 is aligned with the controller's BLE antenna pattern B21. If only the controller's BLE antenna is switched from feed point B1 to feed point B2, the communication link gain can be enhanced by 6.41dB; if only the headset's BLE antenna is switched from feed point A1 to feed point A2, the communication link gain can be enhanced by 2.70dB; if the feed point of both the headset and controller's BLE antenna is switched, the communication link gain can be enhanced by 9.11dB.

[0147] It can be understood that a higher communication link enhancement gain value indicates a higher communication quality.

[0148] Reference Figure 4B , in the scenario where the arm is swung behind the head (i.e. the handle is behind the head display), take the right handle swinging to the back of the head display as an example, Figure 14A As shown, when the right controller is in front of the headset, the BLE antenna 1031 on the right controller is fed through feed point B1, and the headset BLE antenna 1011 is fed through feed point A1. At this time, the directional pattern B11 of feed point B1 is aligned with the directional pattern A11 of feed point A1. When the right controller moves to the back of the headset, the headset detects the change in position of the right controller and switches the feeding point of the right controller BLE antenna to feed point B2. At this time, the directional pattern B21 of feed point B2 is aligned with the directional pattern A11 of feed point A1. This ensures a better headset controller connection experience and ensures signal quality.

[0149] Reference Figure 14B , Figure 14B Figure 2 shows a schematic diagram of communication gain in the scenario where the arm is swung behind the head. Figure 14B As shown, when the right handle is in front of the headset, it should be fed through the feeding point B1 to ensure that the directional pattern B11 of the feeding point B1 of the handle's BLE antenna is aligned with the directional pattern A11 of the feeding point A1 of the headset's BLE antenna.

[0150] When the right controller is moved to the back of the headset, the feed point needs to be switched. The controller's BLE antenna needs to be switched from feed point B1 to feed point B2 to ensure that the headset's BLE antenna pattern A11 is aligned with the controller's BLE antenna pattern B21. Switching the controller's BLE antenna from feed point B1 to feed point B2 can achieve a 6.07dB communication link enhancement.

[0151] Reference Figure 4C , in the scenario of human hand rotation (i.e. handle rotation), take the left hand handle rotation as an example, such as Figure 15ABefore the left controller rotates, the left controller's BLE antenna 1021 is fed through feed point B1, and the headset's BLE antenna 1011 is fed through feed point A1. At this point, the directional pattern B11 of feed point B1 is aligned with the directional pattern A11 of feed point A1. When the left controller rotates θ degrees, the headset detects the rotation angle of the left controller and switches the left controller's BLE antenna's feed point to feed point B2. At this point, the directional pattern B21 of feed point B2 is aligned with the directional pattern A11 of feed point A1. This ensures a better headset controller connection experience and ensures signal quality.

[0152] Reference Figure 15B , Figure 15B FIG. 1 shows a schematic diagram of communication gain in a scenario where a human hand rotates (ie, a handle rotates). Figure 15B As shown, before the left handle is rotated, it should be fed through the feeding point B1 to ensure that the directional pattern B11 of the feeding point B1 of the handle's BLE antenna is aligned with the directional pattern A11 of the feeding point A1 of the head display's BLE antenna.

[0153] After rotating the left controller θ degrees, the controller's BLE antenna needs to be switched from feed point B1 to feed point B2 to ensure that the headset's BLE antenna pattern A11 is aligned with the controller's BLE antenna pattern B21. Switching the controller's BLE antenna from feed point B1 to feed point B2 can achieve a 9.02dB communication link enhancement.

[0154] In the embodiments of the present application, by detecting the relative position between the headset and controller, relative position information and rotation angle information are obtained. This takes into account the three-dimensional spatial changes and rotation angle changes of the controller and headset positions, providing more comprehensive position information. Based on this position information, the BLE antenna feed point is switched to ensure that the directional pattern of the headset's BLE antenna is aligned with the directional pattern of the controller's BLE antenna. This can achieve the optimal selection of the directional pattern of the headset and controller in any scenario, achieving higher communication link enhancement benefits and ensuring communication quality.

[0155] In some embodiments, both the headset and controller utilize a multi-antenna architecture. When the headset detects a change in the controller's position, it performs antenna patrol, selecting an antenna based on signal quality metrics such as the received signal strength indicator (RSSI), packet error rate (PER), reference signal power (RSRP), and signal-to-noise ratio (SNR). This antenna patrol process can result in a lengthy antenna switching process, impacting communication between the headset and controller. The wearable device provided in the embodiments of the present application does not require an antenna patrol process, and switching antenna feed points takes less time.

[0156] It will be understood that, as used herein, the term "module" may refer to or include, or be part of, an application specific integrated circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group) and / or memory that executes one or more software or firmware programs, a combinational logic circuit, and / or other appropriate hardware components that provide the described functionality.

[0157] In some cases, the disclosed embodiments may be implemented in hardware, firmware, software, or any combination thereof. The disclosed embodiments may also be implemented as instructions carried or stored on one or more temporary or non-temporary machine-readable (e.g., computer-readable) storage media, which may be read and executed by one or more processors. For example, the instructions may be distributed over a network or through other computer-readable media. Machine-readable media include any type of machine-readable media suitable for storing or transmitting electronic instructions or information in a form readable by a machine (e.g., a computer).

[0158] In the accompanying drawings, some structural or method features may be shown in a particular arrangement and / or order. However, it should be understood that such a particular arrangement and / or order may not be required. Rather, in some embodiments, these features may be arranged in a manner and / or order different from that shown in the illustrative drawings. In addition, the inclusion of a structural or method feature in a particular figure does not imply that such feature is required in all embodiments, and in some embodiments, such features may not be included or may be combined with other features.

[0159] It should be noted that, in the examples and description of the present application, relational terms such as first and second, etc., are merely used to distinguish one signal or parameter from another signal or parameter, and do not necessarily require or imply any such actual relationship or order between these signals or parameters. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0160] While the present application has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the present application.

Claims

1. A wearable device, characterized in that: The device comprises a handle and a head-mounted display, wherein the head-mounted display comprises a first antenna, the first antenna comprises a first feeding point and a second feeding point, the handle comprises a second antenna, the second antenna comprises a third feeding point and a fourth feeding point, wherein: The first antenna generates a first target pattern when fed by a first target feeding point among the first feeding point and the second feeding point; The second antenna generates a second target pattern when fed by a second target feeding point among the third feeding point and the fourth feeding point; The antenna radiation range indicated by the first target direction pattern and the antenna radiation range indicated by the second target direction pattern at least partially overlap.

2. The wearable device according to claim 1, wherein: The wearable device determines the first target feeding point and the second target feeding point by using six-degree-of-freedom positioning information of the head-mounted display and the handle, wherein the six-degree-of-freedom positioning information includes relative position information and rotation angle information.

3. The wearable device according to claim 2, wherein: The head-mounted display and the handle are respectively provided with a positioning module, and the positioning module determines the six-degree-of-freedom positioning information of the head-mounted display and the handle based on electromagnetic signals.

4. The wearable device according to claim 3, wherein: The handle includes a first positioning module, which includes a signal generator, a digital-to-analog conversion unit, a switch unit, a first signal amplification unit and a three-axis transmitting coil connected in sequence; wherein, The signal generator is used to send the electromagnetic signal, and the electromagnetic signal passes through the digital-to-analog conversion unit, the switch unit and the first signal amplification unit in sequence, and is transmitted by the three-axis transmitting coil.

5. The wearable device according to claim 4, wherein: The head mounted display includes a second positioning module, which includes an analog-to-digital conversion unit, a second signal amplification unit, and a three-axis receiving coil connected in sequence; wherein, The three-axis receiving coil is used to detect the induced electromotive force generated by the electromagnetic signal, and the induced electromotive force is sequentially processed by the second signal amplification unit and the analog-to-digital conversion unit to determine the six-degree-of-freedom positioning information of the head-mounted display and the handle.

6. The wearable device according to claim 3, wherein: The head mounted display includes a first positioning module, which includes a signal generator, a digital-to-analog conversion unit, a switch unit, a first signal amplification unit and a three-axis transmitting coil connected in sequence; wherein, The signal generator is used to send the electromagnetic signal, and the electromagnetic signal passes through the digital-to-analog conversion unit, the switch unit and the first signal amplification unit in sequence, and is transmitted by the three-axis transmitting coil.

7. The wearable device according to claim 6, wherein: The handle includes a second positioning module, which includes an analog-to-digital conversion unit, a second signal amplification unit, and a three-axis receiving coil connected in sequence; wherein, The three-axis receiving coil is used to detect the electromagnetic signal to generate an induced electromotive force, and the induced electromotive force is sequentially processed by the second signal amplification unit and the analog-to-digital conversion unit to determine the six-degree-of-freedom positioning information of the head-mounted display and the handle.

8. The wearable device according to any one of claims 3 to 7, characterized in that: The electromagnetic signal is a periodic signal, and at least two periodic signals in the electromagnetic signal have different amplitudes.

9. The wearable device according to claim 8, wherein: Each periodic signal in the electromagnetic signal has a prefix signal, and the prefix signal of each periodic signal has the same amplitude and frequency as the periodic signal.

10. The wearable device according to claim 9, wherein: The amplitude of the first periodic signal in the electromagnetic signal is greater than the amplitude of the second periodic signal, and the first periodic signal has a first prefix signal, and the second periodic signal has a second prefix signal, wherein, A time interval between the first prefix signal and the first periodic signal is smaller than a time interval between the second prefix signal and the second periodic signal.

11. The wearable device according to claim 1, wherein: The first antenna generates a first directional pattern when fed through the first feeding point, and generates a second directional pattern when fed through the second feeding point; The antenna radiation range indicated by the first direction pattern and the antenna radiation range indicated by the second direction pattern at least partially do not overlap.

12. The wearable device according to claim 1 or 11, characterized in that: The second antenna generates a third directional pattern when fed through the third feeding point, and generates a fourth directional pattern when fed through the fourth feeding point; The antenna radiation range indicated by the third directional pattern and the antenna radiation range indicated by the fourth directional pattern at least partially do not overlap.

13. An antenna control method, characterized in that: Applied to a wearable device, the wearable device includes a handle and a head-mounted display, the head-mounted display includes a first antenna, the first antenna includes a first feeding point and a second feeding point, the handle includes a second antenna, the second antenna includes a third feeding point and a fourth feeding point, the method includes: determining a first target feeding point from the first feeding point and the second feeding point, and determining a second target feeding point from the third feeding point and the fourth feeding point; Controlling the first antenna to be fed through the first target feeding point, and controlling the second antenna to be fed through the second target feeding point; Specifically, the first antenna generates a first target pattern when fed through the first target feeding point, and the second antenna generates a second target pattern when fed through the second target feeding point, and the antenna radiation range indicated by the first target pattern and the antenna radiation range indicated by the second target pattern at least partially overlap.

14. The antenna control method according to claim 13, wherein: The determining a first target feeding point from the first feeding point and the second feeding point, and determining a second target feeding point from the third feeding point and the fourth feeding point, comprises: The first target feeding point and the second target feeding point are determined according to six-degree-of-freedom positioning information of the head-mounted display and the handle, where the six-degree-of-freedom positioning information includes relative position information and rotation angle information.

15. The antenna control method according to claim 14, wherein: Also includes: Based on the electromagnetic signal between the head mounted display and the handle, six-degree-of-freedom positioning information of the head mounted display and the handle is determined.

16. The antenna control method according to claim 15, wherein: The electromagnetic signal is a periodic signal, and at least two periodic signals in the electromagnetic signal have different amplitudes.

17. The antenna control method according to claim 16, wherein: Each periodic signal in the electromagnetic signal has a prefix signal, and the prefix signal of each periodic signal has the same amplitude and frequency as the periodic signal.

18. The antenna control method according to claim 17, wherein: The amplitude of the first periodic signal in the electromagnetic signal is greater than the amplitude of the second periodic signal, and the first periodic signal has a first prefix signal, and the second periodic signal has a second prefix signal, wherein, A time interval between the first prefix signal and the first periodic signal is smaller than a time interval between the second prefix signal and the second periodic signal.

Images