Smart glasses and antenna switching method therefor

Abstract

Provided in the present application are smart glasses and an antenna switching method therefor. The smart glasses comprise a glasses body, a neckband and an antenna system, wherein the glasses body is connected to the neckband. The antenna system comprises a switch switching module, a radio-frequency chip and at least two antennas. The at least two antennas comprise a first antenna and a second antenna, wherein the first antenna and the second antenna are arranged at two ends of the neckband in an extension direction. The radio-frequency chip is at least used for transmitting signals; the switch switching module is electrically connected to the radio-frequency chip, the switch switching module is connected to the at least two antennas in the antenna system, and thus the switch switching module is connected between the radio-frequency chip and the at least two antennas; and the switch switching module is used for electrically connecting the first antenna and the radio-frequency chip, such that the first antenna performs communication, or the switch switching module is used for electrically connecting the second antenna and the radio-frequency chip, such that the second antenna performs communication. The solution can improve the effect of communication between the smart glasses and a peer device, and reduces the power consumption of an antenna system in the smart glasses.

Description

A smart glasses and an antenna switching method for smart glasses.

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411517562.3, filed on October 28, 2024, entitled "A Smart Glasses and an Antenna Switching Method for Smart Glasses", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of communication technology, and in particular to a smart glasses and an antenna switching method for smart glasses. Background Technology

[0004] With the development of technology, smart glasses are becoming increasingly diverse in type and function. Currently, in order to realize the communication capabilities of smart glasses, simplify their structure, and improve their portability, smart glasses also include antennas to enable wireless communication.

[0005] Currently, the antennas of smart glasses have certain coverage blind spots, and the signal in these blind spots is weak. When a communication device (such as a mobile phone) communicating with the antenna enters the aforementioned coverage blind spot, the communication effect is poor, and the path loss of the wireless channel between the antenna and the communication device will increase significantly. In order to ensure the signal quality in the coverage blind spot, the antenna of smart glasses needs to transmit at high power, resulting in high power consumption of smart glasses. Summary of the Invention

[0006] This application provides a smart glasses and an antenna switching method for the smart glasses, so as to improve the communication effect between the smart glasses and the peer device and reduce the power consumption of the antenna system of the smart glasses.

[0007] Firstly, this application provides a smart glasses system. The smart glasses system includes a glasses body, a neckband, and an antenna system. When using the smart glasses, the glasses body is worn on the head, and the neckband is worn around the neck; the glasses body and the neckband are connected. The antenna system includes a switch module, a radio frequency (RF) chip, and at least two antennas. The at least two antennas include a first antenna and a second antenna, which are located at opposite ends of the neckband along its extension direction. The RF chip is used to transmit signals. The switch module is electrically connected to the RF chip and is also connected to each of the at least two antennas in the antenna system. The switch module is connected between the RF chip and the at least two antennas, and is used to electrically connect the first antenna to the RF chip, enabling the first antenna to communicate; or, it is used to electrically connect the second antenna to the RF chip, enabling the second antenna to communicate. Each of the at least two antennas is electrically connected to the RF chip through the switch module, thereby achieving the communication function. When the neckband is worn around the user's neck, the first and second antennas can be located on opposite sides of the user's body. The radiation patterns of the first antenna and the second antenna are respectively oriented towards the user's sides. When the peer device is located on the side where the first antenna is located, the switching module electrically connects the first antenna and the RF chip, enabling the first antenna to operate. This places the peer device in the coverage area where the first antenna signal is strong, facilitating communication between the peer device and the first antenna with low power consumption. When the peer device is located on the side where the second antenna is located, the switching module electrically connects the second antenna and the RF chip, enabling the second antenna to operate. This places the peer device in the coverage area where the second antenna signal is strong, facilitating communication between the peer device and the second antenna with low power consumption and good communication performance between the smart glasses and the peer device.

[0008] Furthermore, the antenna system may include a third antenna among at least two antennas. This third antenna is positioned within the neck loop and located between the first and second antennas. The aforementioned switch module is also connected to the third antenna and is used to electrically connect the third antenna to the radio frequency chip, enabling communication between the third antenna and the chip. The third antenna is positioned relatively close to the user's rear, and its radiation pattern is oriented towards the user's rear, resulting in better signal coverage behind the user. This further reduces the power consumption of the smart glasses, extends their standby time, and improves the wireless communication performance.

[0009] When configuring the third antenna, its distance from the first antenna can be the same as its distance from the second antenna. In this scheme, the first, second, and third antennas are distributed relatively evenly, thus providing relatively uniform signal coverage around the user's body. This allows the smart glasses to communicate with other devices located anywhere around the user's body in a high-quality, low-power manner.

[0010] In another technical solution, the neckband has a first end face at one end along its extension direction and a second end face at the other end. The distance between the third antenna and the first end face is the same as the distance between the third antenna and the second end face. In this solution, the third antenna is located in the middle of the neckband, so when the user is wearing the neckband, the third antenna is located exactly behind the user's neck, which helps to improve the coverage effect of the third antenna behind the user.

[0011] To achieve intelligent control and selection of the antenna system, the aforementioned smart glasses also include a control module and a signal monitoring module. The signal monitoring module monitors the packet loss rate and / or signal strength of each of at least two antennas communicating with the peer device. The control module is connected to both the signal monitoring module and the switch module. Based on the monitoring results from the signal monitoring module, the control module controls the switch module to switch the electrical connection between the first or second antenna and the RF chip. This solution can monitor and determine which antenna in the antenna system has better communication performance with the peer device, or in other words, determine which antenna has the strongest coverage area for the peer device. This allows the peer device to communicate with the antenna in the antenna system with the best communication performance, thereby improving the communication effect between the smart glasses and the peer device. Furthermore, the adjustment process is flexible; even if the relative positions of the smart glasses and the peer device change frequently, reliable and low-power communication between the smart glasses and the peer device can still be maintained.

[0012] Similarly, in another technical solution, the smart glasses include a third antenna. The smart glasses also include a control module and a signal monitoring module. The signal monitoring module monitors the packet loss rate and / or signal strength of each of the at least two antennas communicating with the peer device. The control module is connected to the position module and the switch module, respectively. Based on the monitoring results from the signal monitoring module, the control module controls the switch module to switch the electrical connection between the first, second, or third antenna and the RF chip. Likewise, in this solution, even if the relative position of the smart glasses and the peer device changes frequently, reliable and low-power communication between the smart glasses and the peer device is still possible.

[0013] In the specific technical solution, the signal monitoring module is used to monitor the packet loss rate of each of the at least two antennas communicating with the peer device, and the control module controls the switch module to switch the antenna with the lowest packet loss rate communicating with the peer device to be electrically connected to the radio frequency chip; or, the control module controls the switch module to switch the antenna with a packet loss rate lower than a first preset value communicating with the peer device to be electrically connected to the radio frequency chip.

[0014] In another technical solution, the signal monitoring module is used to monitor the signal strength of each of the at least two antennas communicating with the peer device, and the control module controls the switch module to switch the antenna with the strongest signal strength communicating with the peer device to be electrically connected to the radio frequency chip; or, the control module controls the switch module to switch the antenna with a signal strength higher than a second preset value communicating with the peer device to be electrically connected to the radio frequency chip.

[0015] Regarding the specific structure of the antennas in the aforementioned antenna system, the first antenna includes a first stub and a second stub. The length of the first stub is greater than the length of the second stub. The operating frequency of the first stub is between 2.4 GHz and 2.48 GHz, thus meeting the communication requirements of the smart glasses' Wi-Fi 2.4 GHz and BT 2.4 GHz. The operating frequency of the second stub is between 5.1 GHz and 5.8 GHz, thus meeting the communication requirements of the smart glasses' Wi-Fi 5 GHz. The second antenna includes a third stub and a fourth stub. The length of the third stub is greater than the length of the fourth stub. The operating frequency of the third stub is between 2.4 GHz and 2.48 GHz, thus meeting the communication requirements of the smart glasses' Wi-Fi 2.4 GHz and BT 2.4 GHz. The operating frequency of the fourth stub is between 5.1 GHz and 5.8 GHz, thus meeting the communication requirements of the smart glasses' Wi-Fi 5 GHz.

[0016] In a specific technical solution, the first antenna and the second antenna can be located on a flexible circuit board, which makes it easier to adapt to the structural shape of the neck ring and improves the stability of the first antenna and the second antenna installed on the neck ring.

[0017] This allows the third antenna to be placed on the printed circuit board, and further allows the switching module and RF chip to be placed on the printed circuit board, thereby facilitating the electrical connection between various devices.

[0018] Alternatively, the third antenna can also be disposed on the flexible circuit board, or the third antenna can be a laser-formed antenna. There are many options for the placement of the third antenna, and this application does not limit this.

[0019] There are multiple options for feeding the antennas mentioned above. For example, the feeding method can be microstrip line direct feeding or spring feed.

[0020] Secondly, this application also provides an antenna switching method for smart glasses, which is applied to the smart glasses provided in the first aspect above. The antenna switching method includes: monitoring the packet loss rate of communication between each of the at least two antennas and the peer device; then, controlling a switch module to electrically connect the antenna with the lowest packet loss rate to the radio frequency chip; or, controlling the switch module to electrically connect the antenna with a packet loss rate lower than a first preset value to the radio frequency chip. This solution enables the smart glasses to maintain good wireless communication with peer devices located in different locations, with low communication power consumption and good communication performance.

[0021] In the specific technical solution, the antenna switching method includes: monitoring multiple packet loss rates of communication between at least two antennas and the peer device, and calculating the average packet loss rate based on the multiple packet loss rates; controlling the switch module to switch the antenna with the lowest average packet loss rate in communication with the peer device to be electrically connected to the RF chip; or, controlling the switch module to switch the antenna with an average packet loss rate lower than a first preset value in communication with the peer device to be electrically connected to the RF chip. This solution can improve the accuracy of monitoring the communication effect between the peer device and each antenna.

[0022] Furthermore, the aforementioned antenna switching method includes: monitoring the signal strength of communication between the antenna electrically connected to the RF chip and the peer device; and reducing the output power of the RF chip when the signal strength exceeds a second preset value. This reduces the power consumption of the smart glasses' wireless communication, thereby further reducing the power consumption of the smart glasses.

[0023] Thirdly, this application also provides an antenna switching method for smart glasses, which is applied to the smart glasses provided in the first aspect above. The antenna switching method includes: monitoring the signal strength of each of at least two antennas communicating with a peer device; controlling a switching module to electrically connect the antenna with the strongest signal strength communicating with the peer device to the radio frequency chip; or, controlling the switching module to electrically connect the antenna with a signal strength higher than a second preset value communicating with the peer device to the radio frequency chip. This solution enables the smart glasses to maintain good wireless communication with peer devices located in different locations, with low communication power consumption and good communication performance.

[0024] In the specific technical solution, the antenna switching method includes: monitoring multiple signal strengths of each of at least two antennas communicating with the peer device, and calculating the average signal strength based on the multiple signal strengths; controlling the switching module to electrically connect the antenna with the strongest average signal strength communicating with the peer device to the RF chip; or, controlling the switching module to electrically connect the antenna with an average signal strength higher than a fourth preset value to the RF chip. This solution can improve the accuracy of monitoring the communication effect between the peer device and each antenna.

[0025] Furthermore, the aforementioned antenna switching method includes: monitoring the signal strength of communication between the antenna electrically connected to the RF chip and the peer device; and reducing the output power of the RF chip when the signal strength exceeds a second preset value. This reduces the power consumption of the smart glasses' wireless communication, thereby further reducing the power consumption of the smart glasses. Attached Figure Description

[0026] Figure 1 is a schematic diagram of a smart glasses structure in an embodiment of this application;

[0027] Figure 2 is a schematic diagram of an antenna system architecture for smart glasses in an embodiment of this application;

[0028] Figure 3 is a schematic diagram of an antenna system architecture for smart glasses in an embodiment of this application;

[0029] Figure 4 is a schematic diagram of an application scenario of smart glasses in an embodiment of this application;

[0030] Figure 5 is a radiation pattern of the first antenna of the smart glasses in an embodiment of this application;

[0031] Figure 6 is a radiation pattern of the second antenna of the smart glasses in an embodiment of this application;

[0032] Figure 7 is a schematic diagram of an application scenario of smart glasses in the comparative example;

[0033] Figure 8 is a schematic diagram of a smart glasses structure in an embodiment of this application;

[0034] Figure 9 is a schematic diagram of an antenna system architecture for smart glasses in an embodiment of this application;

[0035] Figure 10 is a schematic diagram of an application scenario of smart glasses in an embodiment of this application;

[0036] Figure 11 is a radiation pattern of the third antenna of the smart glasses in an embodiment of this application;

[0037] Figure 12 is a schematic diagram of an application scenario of smart glasses in the comparative example;

[0038] Figure 13 is a schematic diagram of a structure of the first antenna in an embodiment of this application;

[0039] Figure 14 is a schematic diagram of a structure of the first antenna in an embodiment of this application;

[0040] Figure 15 is a flowchart illustrating an antenna switching method in an embodiment of this application.

[0041] Reference numerals: 1-Glasses body; 2-Neck ring; 21-First end face; 22-Second end face; 23-Middle face; 3-Antenna system; 31-Switch module; 32-RF chip; 33-Antenna; 331-First antenna; 3311-First stub; 3312-Second stub; 332-Second antenna; 3321-Third stub; 3322-Fourth stub; 333-Third antenna; 34-RF front-end module; 4-Transmission line. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. The same reference numerals in the figures denote the same or similar structures, and therefore repeated descriptions of them will be omitted. The terms expressing position and direction described in the embodiments of this application are illustrative based on the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this application. The accompanying drawings of the embodiments of this application are only for illustrating relative positional relationships and do not represent actual scale.

[0043] It should be noted that specific details are set forth in the following description to facilitate understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0044] To facilitate understanding of the smart glasses and antenna switching method provided in this application, their application scenarios will be introduced first below.

[0045] With the development of technology, smart glasses are becoming increasingly feature-rich, and many of them require communication with peer devices during use. Specifically, in this embodiment, the peer device communicating with the smart glasses can be any communication device such as a mobile phone, tablet, router, wristband device, or game console.

[0046] In practical applications, taking communication between smart glasses and mobile terminals such as smartphones or tablets as an example, it typically needs to support wireless fidelity peer-to-peer (Wi-Fi P2P) and Bluetooth (BT) short-range communication; in addition, it also needs to support wireless local area network (WLAN) communication with communication devices such as routers. Currently, the communication requirements of smart glasses have shifted from "wired" communication to "wireless" communication. Therefore, smart glasses are equipped with antennas to enable wireless communication.

[0047] Smart glasses typically include communication modules, computing modules, and batteries, making them relatively heavy. To improve user comfort and reduce weight, smart glasses consist of a main body and a neckband. When worn, the main body is placed on the head, and the neckband is worn around the neck. The main body and neckband are connected via a transmission cable. The communication, computing, and battery modules are housed in the neckband, while the main body can house optical display modules, acoustic modules, cameras, and sensors.

[0048] The aforementioned communication module of smart glasses may include an antenna system for wireless communication with peer devices. Currently, the uplink transmission scenarios for smart glasses wireless communication are surging. Uplink expansion channels and display-computing separation architectures both require the glasses to act as transmitters, sending data to peer devices for extended periods. Many scenarios necessitate uplink signal transmission from smart glasses, such as first-person live streaming, video calls, file transfers, perceptual computing, and artificial intelligence (AI) information uploading, all requiring the transmission of information from cameras, sensors, etc., to mobile phones or the cloud. However, compared to downlink signal reception, uplink signal transmission consumes significantly more power, accounting for a larger proportion of total power consumption. Furthermore, considering wearing comfort and limited battery weight and capacity, continuous uplink transmission leads to excessive system power consumption and a sharp reduction in battery life. Therefore, reducing wireless power consumption, especially uplink wireless power consumption, is crucial. In addition, improving the communication rate of smart glasses is also significant for enhancing their performance.

[0049] Specifically, the smart glasses in this application embodiment can be augmented reality (AR) glasses, or virtual reality (VR) glasses.

[0050] Figure 1 is a schematic diagram of a smart glasses structure according to an embodiment of this application. As shown in Figure 1, in one embodiment, the smart glasses include a glasses body 1, a neckband 2, and an antenna system 3. The glasses body 1 and the neckband 2 are connected, specifically through an electrical connection via a transmission line 4. The transmission line 4 can be flexible, thereby improving the flexibility of the glasses body 1. Of course, in some products where the flexibility requirements of the glasses body 1 and the neckband 2 are low, the transmission line 4 can also be provided in a rigid structure.

[0051] Figure 2 is a schematic diagram of an antenna system 3 for smart glasses according to an embodiment of this application. As shown in Figure 2, in one embodiment, the antenna system 3 includes a switch module 31, a radio frequency chip 32, and at least two antennas 33. The radio frequency chip 32 is used to transmit signals. The switch module 31 is electrically connected to the radio frequency chip 32, and the switch module 31 is connected to the at least two antennas 33 respectively. It can be understood that since the switch module 31 is connected between the radio frequency chip 32 and the at least two antennas 33, any one of the at least two antennas 33 is electrically connected to the radio frequency chip 32 through the switch module 31, thereby realizing the communication function. Specifically, as shown in Figure 2, the aforementioned at least two antennas 33 include a first antenna 331 and a second antenna 332. A switch module 31 is connected to both the first antenna 331 and the second antenna 332. The switch module 31 electrically connects the first antenna 331 to the radio frequency chip 32, enabling the first antenna 331 to communicate, for example, to transmit a signal. The switch module 31 also electrically connects the second antenna 332 to the radio frequency chip 32, enabling the first antenna 331 to communicate, for example, to transmit a signal. In some embodiments, the first antenna 331 or the second antenna 332 can also be used to receive signals. This application primarily uses the example of an antenna system transmitting signals to illustrate the technical solution of this application.

[0052] Figure 3 is a schematic diagram of an antenna system 3 for smart glasses in an embodiment of this application. As shown in Figure 3, in one embodiment, the antenna system 3 further includes a radio frequency (RF) front-end module 34. The RF front-end module 34 is disposed between the RF chip 32 and the switching module 31, and is used for transmitting, receiving, and processing RF signals, such as filtering, amplification, and impedance matching. The RF front-end module 34 includes at least one of a filter, a power amplifier, a low-noise amplifier, a matching circuit, a duplexer, and a combiner.

[0053] Figure 4 is a schematic diagram of an application scenario of smart glasses in this application embodiment. Referring to Figures 1 to 4, the first antenna 331 and the second antenna 332 are respectively disposed at both ends of the neckband 2 along the extension direction. When the neckband 2 is worn around the user's neck, the first antenna 331 and the second antenna 332 can be disposed on both sides of the user's body. Figure 5 is a radiation pattern of the first antenna 331 of the smart glasses in this application embodiment, and Figure 6 is a radiation pattern of the second antenna 332 of the smart glasses in this application embodiment. As shown in Figures 4 to 6, in this embodiment, the radiation patterns of the first antenna 331 and the second antenna 332 are respectively oriented towards both sides of the user's body. By switching the first antenna 331 or the second antenna 332 to be electrically connected to the radio frequency chip 32 through the switch switching module 31, that is, selecting the first antenna 331 to work or selecting the second antenna 332 to work, the antenna system 3 can have good coverage on both sides of the user's body. Specifically, if the peer device is located on the side where the first antenna 331 is located, the switch module 31 can electrically connect the first antenna 331 and the radio frequency chip 32, making the first antenna 331 work. This places the peer device in a coverage area where the first antenna 331 has a strong signal, facilitating communication between the peer device and the first antenna 331, and resulting in low power consumption during communication. Alternatively, if the peer device is located on the side where the second antenna 332 is located, the switch module 31 can electrically connect the second antenna 332 and the radio frequency chip 32, making the second antenna 332 work. This places the peer device in a coverage area where the second antenna 332 has a strong signal, facilitating communication between the peer device and the second antenna 332, and resulting in low power consumption during communication. Furthermore, the communication effect between the smart glasses and the peer device is better.

[0054] It is worth noting that the aforementioned first antenna 331 and second antenna 332 are respectively disposed at both ends of the neck ring 2 along the extension direction. This does not specifically mean that the first antenna 331 and second antenna 332 are disposed on two different end faces of the neck ring 2 along the extension direction, but rather closer to the end faces. For example, the end faces of the neck ring 2 along the extension direction are the first end face 21 and the second end face 22, respectively. The neck ring 2 includes a middle surface 23. The distance between the middle surface 23 and the first end face 21 along the extension direction of the neck ring 2 is the same as the distance between the middle surface 23 and the second end face 22 along the extension direction of the neck ring 2. However, the distance between the first antenna 331 and the first end face 21 along the extension direction of the neck ring 2 is less than the distance between the first antenna 331 and the middle surface 23 along the extension direction of the neck ring 2; similarly, the distance between the second antenna 332 and the second end face 22 along the extension direction of the neck ring 2 is less than the distance between the second antenna 332 and the middle surface 23 along the extension direction of the neck ring 2.

[0055] It is worth noting that in the embodiments of this application, the distance between A and B refers to the distance between the edge of A towards B and the edge of B towards A. The term "same" in the embodiments of this application refers to the same design value, not absolute mathematical similarity. For example, it may include tolerances caused by installation and manufacturing processes, etc., meaning that "same distance" in this application can also be considered as "approximately the same distance".

[0056] Figure 7 is a schematic diagram of an application scenario of smart glasses in the comparative example. As shown in Figure 7, in the comparative example, the smart glasses only include a first antenna 331, which is located at one end of the neck ring 2. The radiation pattern of the first antenna 331 is only located on the side where the user faces the first antenna 331, forming a coverage blind spot on the opposite side. In this embodiment, the coverage blind spot refers to an area with weak or no signal, not necessarily a completely signal-free area. To enable wireless communication between the first antenna 331 and the peer device located in this area, the antenna system 3 needs to operate at high power, resulting in poor power consumption of the smart glasses and poor wireless communication performance between the smart glasses and the peer device. The communication system in this embodiment includes a first antenna 331 and a second antenna 332 located at both ends of the neck ring 2. The switch module 31 can switch the first antenna 331 or the second antenna 332 to be electrically connected to the RF chip 32, allowing the peer device to communicate with different antennas at different user positions. This reduces the power consumption of the smart glasses, extends their standby time, and improves the communication performance between the smart glasses and the peer device.

[0057] Figure 8 is a structural schematic diagram of smart glasses in an embodiment of this application, and Figure 9 is an architectural schematic diagram of the antenna system 3 of smart glasses in an embodiment of this application. As shown in Figures 8 and 9, in this embodiment of the application, the antenna system 3 includes at least two antennas, including a third antenna 333. The third antenna 333 is also disposed on the neck ring 2 and located between the first antenna 331 and the second antenna 332. The aforementioned switch module 31 is also connected to the third antenna 333. The switch module 31 is also used to electrically connect the third antenna 333 and the radio frequency chip 32, so that the third antenna 333 can communicate, for example, by enabling the first antenna 331 to transmit signals.

[0058] Figure 10 is a schematic diagram of an application scenario of smart glasses in this embodiment of the application. As shown in Figure 10, in this embodiment of the application, the antenna system 3 of the smart glasses includes a first antenna 331, a second antenna 332, and a third antenna 333. The first antenna 331 and the second antenna 332 are respectively located at both ends of the extension direction of the neck ring 2, and the third antenna 333 is located between the first antenna 331 and the second antenna 332 of the neck ring 2, so the third antenna 333 is relatively close to the rear of the user. Figure 11 is a radiation pattern of the third antenna 333 of the smart glasses in this embodiment of the application. As shown in Figure 11, the radiation pattern of the third antenna 333 is oriented towards the rear of the user, so that the signal coverage behind the user is also better, thereby further reducing the power consumption of the smart glasses, extending the standby time of the smart glasses, and improving the wireless communication effect of the smart glasses.

[0059] Figure 12 is a schematic diagram of an application scenario of smart glasses in the comparative example. As shown in Figure 12, in the comparative example, the smart glasses only include a first antenna 331, which is located at one end of the neckband 2. After the user wears the neckband 2, the first antenna 331, relative to being located in front of the user, easily forms a coverage blind spot behind the user. In order for the first antenna 331 to achieve wireless communication with the other end device located behind the user, the antenna system 3 needs to operate at high power, resulting in poor power consumption of the smart glasses and poor wireless communication performance between the smart glasses and the other end device. The communication system in this embodiment includes a first antenna 331 and a second antenna 332 located at both ends of the neckband 2, and a third antenna 333 located between the first antenna 331 and the second antenna 332. The first antenna 331, the second antenna 332, and the third antenna 333 respectively cover the area in each direction of the user, so that the user can have a good signal coverage effect all around. The switch module 31 can be used to switch at least one of the first antenna 331, the second antenna 332, or the third antenna 333 to be electrically connected to the radio frequency chip 32, thereby allowing the peer device to communicate with different antennas at different functional positions of the user. This reduces the power consumption of the smart glasses, extends the standby time of the smart glasses, and improves the communication effect between the smart glasses and the peer device.

[0060] Specifically, when the first antenna 331, the second antenna 332, and the third antenna 333 are configured in the neckband 2, the distance between the third antenna 333 and the first antenna 331 can be the same as the distance between the third antenna 333 and the second antenna 332. The distance between the third antenna 333 and the first antenna 331 can refer to the distance between the edge of the third antenna 333 toward the first antenna 331 and the distance between the edge of the first antenna 331 and the edge of the third antenna 333. Similarly, the distance between the third antenna 333 and the second antenna 332 can refer to the distance between the edge of the third antenna 333 toward the second antenna 332 and the distance between the edge of the second antenna 332 and the edge of the third antenna 333. In this scheme, the distribution of the first antenna 331, the second antenna 332, and the third antenna 333 is relatively uniform, thus providing relatively uniform signal coverage around the user's body, enabling high-quality and low-power communication between the smart glasses and any device located around the user's body.

[0061] In a further embodiment, the neckband 2 has a first end face 21 at one end along its extension direction and a second end face 22 at the other end. The distance between the third antenna 333 and the first end face 21 is the same as the distance between the third antenna 333 and the second end face 22. Specifically, the distance between the third antenna 333 and the first end face 21 refers to the distance between the edge of the third antenna 333 facing the first end face 21 and the first end face 21, and the distance between the third antenna 333 and the second end face 22 refers to the distance between the edge of the third antenna 333 facing the second end face 22 and the second end face 22. In this embodiment, the third antenna 333 is located in the middle of the neckband 2, so that when the user wears the neckband 2, the third antenna 333 is better oriented towards the user's rear side, thereby improving the coverage effect of the third antenna 333 behind the user.

[0062] When using the smart glasses provided in this application for wireless communication, from the user's perspective, the first antenna 331 is located on the user's left side, the second antenna 332 is located on the user's right side, and the third antenna 333 is located behind the user. When the peer device is located on the user's left side, the switch module 31 can switch the first antenna 331 to be electrically connected to the radio frequency chip 32, enabling the first antenna 331 of the smart glasses to communicate wirelessly with the peer device. When the peer device is located on the user's right side, the switch module 31 can switch the second antenna 332 to be electrically connected to the radio frequency chip 32, enabling the second antenna 332 of the smart glasses to communicate wirelessly with the peer device. When the peer device is located behind the user, the switch module 31 can switch the third antenna 333 to be electrically connected to the radio frequency chip 32, enabling the third antenna 333 of the smart glasses to communicate wirelessly with the peer device.

[0063] Furthermore, in practical engineering, taking the placement of the third antenna on a printed circuit board as an example, the layout of the printed circuit board may prevent the third antenna from being precisely located in the center of the neckband. Moreover, the specific position of the printed circuit board within the neckband is also affected by the neckband's structural layout, potentially resulting in some offset of the third antenna. In short, the third antenna should be placed in the area near the back of the body when the neckband is worn, so that its radiation pattern is better oriented towards the back of the body.

[0064] In some embodiments, the third antenna may also work in conjunction with the first antenna or the second antenna to enhance the signal strength in a certain area. The third antenna is positioned in the center of the neck ring, which helps to improve the symmetry of the third antenna on both sides.

[0065] In this embodiment, any one of the at least two antennas in the antenna system 3 of the smart glasses can fulfill various communication requirements of the smart glasses. For example, the operating frequency band of any one of the at least two antennas can cover the frequency bands of Wi-Fi 2.4GHz, Wi-Fi 5GHz, and BT 2.4GHz. Specifically, any one of the at least two antennas can include a stub operating at a frequency of 2.4 GHz and a stub operating at a frequency of 5 GHz.

[0066] Specifically, Figure 13 is a schematic diagram of one structure of the first antenna 331 in an embodiment of this application. As shown in Figure 13, in one embodiment, the first antenna 331 may include a first stub 3311 and a second stub 3312. The length of the first stub 3311 is greater than the length of the second stub 3312. The operating frequency of the first stub 3311 is between 2.4 GHz and 2.48 GHz, thereby meeting the communication requirements of Wi-Fi 2.4 GHz and BT 2.4 GHz for smart glasses. The operating frequency of the second stub 3312 is between 5.1 GHz and 5.8 GHz, thereby meeting the communication requirements of Wi-Fi 5 GHz for smart glasses.

[0067] Similarly, Figure 14 is a schematic diagram of one structure of the first antenna 331 in an embodiment of this application. As shown in Figure 14, in one embodiment, the second antenna 332 includes a third stub 3321 and a fourth stub 3322. The length of the third stub 3321 is greater than the length of the fourth stub 3322. The operating frequency of the third stub 3321 is 2.4GHz to 2.48GHz, thereby meeting the communication requirements of Wi-Fi 2.4GHz and BT 2.4GHz for smart glasses. The operating frequency of the fourth stub 3322 is 5.1GHz to 5.8GHz, thereby meeting the communication requirements of Wi-Fi 5GHz for smart glasses.

[0068] Similarly, the aforementioned third antenna includes a fifth segment and a sixth segment, with the fifth segment being longer than the sixth segment. The fifth segment operates at a frequency of 2.4 GHz to 2.48 GHz, thus meeting the communication requirements of the smart glasses' Wi-Fi 2.4 GHz and BT 2.4 GHz. The sixth segment operates at a frequency of 5.1 GHz to 5.8 GHz, thus meeting the communication requirements of the smart glasses' Wi-Fi 5 GHz.

[0069] In a specific embodiment, the first antenna 331 and the second antenna 332 can be located on a flexible circuit board, thereby facilitating adaptation to the structural shape of the neck ring 2 and improving the stability of the first antenna 331 and the second antenna 332 mounted on the neck ring 2.

[0070] The third antenna 333 can be placed on the printed circuit board, and the switch module 31 and the radio frequency chip 32 can also be placed on the printed circuit board, thereby facilitating the electrical connection between the various devices.

[0071] Alternatively, the third antenna 333 can also be disposed on the flexible circuit board, or the third antenna 333 can also be a laser direct structuring (LDS) antenna. There are many options for the placement of the third antenna 333, and this application does not limit it.

[0072] There are multiple options for feeding the antennas mentioned above. For example, the feeding method can be microstrip line direct feeding or spring feed.

[0073] To enable the operation of the switch switching module 31, the smart glasses include a control module, which allows the switch switching module 31 to be connected to the control module. The user can manually control the control module to control the switch switching module 31 to electrically connect at least one antenna in the antenna system 3 to the other device based on the positional relationship between the user and the other device.

[0074] Alternatively, the smart glasses may also include a signal monitoring module, which is used to monitor the packet loss rate and / or signal strength of each of the at least two antennas and the peer device. The control module is connected to the position module and the switch switching module 31 respectively. The control module is used to control the switch switching module 31 to switch at least one of the at least two antennas to be electrically connected to the radio frequency chip 32 according to the monitoring results of the signal monitoring module.

[0075] The aforementioned signal monitoring module can be integrated with the RF chip 32, or it can be integrated with the control module, or it can be integrated with the signal monitoring module, control module, and RF chip 32. In short, there are no specific restrictions on whether the physical structure is separate or integrated.

[0076] In a specific embodiment, the signal monitoring module receives service frames at certain time intervals and determines the packet loss rate and / or signal strength of each antenna in at least two antennas in the antenna system 3.

[0077] In one specific embodiment, the signal monitoring module is used to monitor the packet loss rate of each of the at least two antennas in the antenna system 3 when communicating with the peer device, and to control the switch module to electrically connect the antenna with the lowest packet loss rate when communicating with the peer device to the RF chip 32. Alternatively, the control switch module can switch the antenna with a packet loss rate lower than a first preset value when communicating with the peer device to electrically connect to the RF chip 32.

[0078] The signal monitoring module can also be used to monitor the signal strength of each of the at least two antennas in the antenna system 3 communicating with the peer device, and control the switch module to switch the antenna with the strongest signal strength communicating with the peer device to be electrically connected to the RF chip 32. Alternatively, the switch module can control the switch module to switch the antenna with a signal strength higher than a second preset value communicating with the peer device to be electrically connected to the RF chip 32.

[0079] In this scheme, the signal monitoring module determines the communication quality between each antenna of the smart glasses and the peer device, selects the antenna with the best communication quality, and obtains the minimum path loss. As the path loss decreases, the wireless transmission power of the smart glasses' antenna system 3 can be reduced, thereby reducing wireless transmission power consumption.

[0080] Specifically, when the antenna system 3 includes a first antenna 331 and a second antenna 332, the control module controls the switch switching module 31 to switch the electrical connection between the first antenna 331 or the second antenna 332 and the radio frequency chip 32 based on the monitoring results of the signal monitoring module. When the antenna system 3 includes a first antenna 331, a second antenna 332, and a third antenna 333, the control module controls the switch switching module 31 to switch the electrical connection between the first antenna 331, the second antenna 332, or the third antenna 333 and the radio frequency chip 32 based on the monitoring results of the signal monitoring module.

[0081] In one embodiment, the control module selects the antenna connected to the RF chip 32 based on the packet loss rate. Specifically, the signal monitoring module monitors the packet loss rate of each of at least two antennas communicating with the peer device, and the control module controls the switching module to electrically connect the antenna with the lowest packet loss rate communicating with the peer device to the RF chip 32; or, the control module controls the switching module to electrically connect the antenna with a packet loss rate lower than a first preset value communicating with the peer device to the RF chip 32.

[0082] In one embodiment, the control module selects the antenna connected to the RF chip 32 based on the signal strength. Specifically, the signal monitoring module monitors the signal strength of each of at least two antennas communicating with the peer device, and the control module controls the switching module to electrically connect the antenna with the strongest signal strength communicating with the peer device to the RF chip 32; or, the control module controls the switching module to electrically connect the antenna with a signal strength higher than a second preset value communicating with the peer device to the RF chip 32.

[0083] This application also provides an antenna switching method for smart glasses, which is used to enable the antenna system 3 of the smart glasses in any of the above embodiments to operate.

[0084] In one embodiment, the antenna switching method for the smart glasses includes:

[0085] Step S101: Monitor the packet loss rate of communication between each of the at least two antennas and the peer device;

[0086] Step S102: The control switch module switches the antenna with the lowest packet loss rate for communication with the peer device and electrically connects it to the radio frequency chip.

[0087] When the antenna system includes a first antenna and a second antenna, the packet loss rate for communication between the first antenna and the peer device is a first packet loss rate, and the packet loss rate for communication between the second antenna and the peer device is a second packet loss rate. When the first packet loss rate is lower than the second packet loss rate, the control module controls the switch switching module to switch the first antenna to be electrically connected to the RF chip; when the second packet loss rate is lower than the first packet loss rate, the control module controls the switch switching module to switch the second antenna to be electrically connected to the RF chip.

[0088] When the antenna system includes a first antenna, a second antenna, and a third antenna, the packet loss rate for communication between the first antenna and the peer device is a first packet loss rate, the packet loss rate for communication between the second antenna and the peer device is a second packet loss rate, and the packet loss rate for communication between the third antenna and the peer device is a third packet loss rate. When the first packet loss rate is lower than the second packet loss rate and lower than the third packet loss rate, the control module controls the switch switching module to switch the electrical connection between the first antenna and the RF chip; when the second packet loss rate is lower than the first packet loss rate and lower than the third packet loss rate, the control module controls the switch switching module to switch the electrical connection between the second antenna and the RF chip; when the third packet loss rate is lower than the first packet loss rate and lower than the second packet loss rate, the control module controls the switch switching module to switch the electrical connection between the third antenna and the RF chip.

[0089] This solution enables smart glasses to maintain good wireless communication with peer devices located in different locations, with low power consumption and good communication performance.

[0090] In one embodiment, the antenna switching method for smart glasses includes:

[0091] Step S201: Monitor the packet loss rate of communication between each of the at least two antennas and the peer device;

[0092] Step S202: The control switch module switches the antenna and radio frequency chip to an electrical connection when the packet loss rate of communication with the peer device is lower than the first preset value.

[0093] When the antenna system includes a first antenna and a second antenna, the packet loss rate for communication between the first antenna and the peer device is a first packet loss rate, and the packet loss rate for communication between the second antenna and the peer device is a second packet loss rate. When the first packet loss rate is lower than a first preset value, the control module controls the switch switching module to switch the first antenna to be electrically connected to the RF chip; when the second packet loss rate is lower than the first preset value, the control module controls the switch switching module to switch the second antenna to be electrically connected to the RF chip. When both the first and second packet loss rates are lower than the first preset value, the control module controls the switch switching module to switch the first antenna or the second antenna to be electrically connected to the RF chip, specifically, the antenna currently communicating with the peer device can continue to communicate with the peer device.

[0094] When the antenna system includes a first antenna, a second antenna, and a third antenna, the packet loss rate for communication between the first antenna and the peer device is a first packet loss rate, the packet loss rate for communication between the second antenna and the peer device is a second packet loss rate, and the packet loss rate for communication between the third antenna and the peer device is a third packet loss rate. When the first packet loss rate is lower than a first preset value, the control module controls the switch switching module to switch the first antenna to be electrically connected to the RF chip; when the second packet loss rate is lower than the first preset value, the control module controls the switch switching module to switch the second antenna to be electrically connected to the RF chip; when the third packet loss rate is lower than the first preset value, the control module controls the switch switching module to switch the third antenna to be electrically connected to the RF chip. When the first, second, and third packet loss rates are all lower than the first preset value, the control module controls the switch switching module to switch the first antenna, the second antenna, or the third antenna to be electrically connected to the RF chip, specifically, the antenna currently communicating with the peer device can continue to communicate with the peer device.

[0095] This enables smart glasses to maintain good wireless communication with peer devices located in different places, with low power consumption and good communication performance.

[0096] In a further embodiment, to improve monitoring accuracy, multiple packet loss rates of each of the at least two antennas communicating with the peer device can be monitored, and an average packet loss rate can be calculated based on these multiple packet loss rates to obtain the average packet loss rate of each of the at least two antennas. Then, the control switch module switches the antenna with the lowest average packet loss rate communicating with the peer device to be electrically connected to the RF chip; or, the control switch module switches the antenna with an average packet loss rate lower than a first preset value to be electrically connected to the RF chip.

[0097] Specifically, when the antenna system includes a first antenna and a second antenna, a first average packet loss rate is calculated based on multiple packet loss rates during communication between the first antenna and the peer device, and a second average packet loss rate is calculated based on multiple packet loss rates during communication between the second antenna and the peer device. When the first average packet loss rate is lower than the second average packet loss rate, the control module controls the switch switching module to switch the first antenna to be electrically connected to the RF chip; when the second average packet loss rate is lower than the first average packet loss rate, the control module controls the switch switching module to switch the second antenna to be electrically connected to the RF chip.

[0098] When the antenna system includes a first antenna, a second antenna, and a third antenna, a first average packet loss rate is calculated based on multiple packet loss rates during communication between the first antenna and the peer device. A second average packet loss rate is calculated based on multiple packet loss rates during communication between the second antenna and the peer device. A third average packet loss rate is calculated based on multiple packet loss rates during communication between the third antenna and the peer device. When the first average packet loss rate is lower than both the second and third average packet loss rates, the control module controls the switch switching module to switch the electrical connection between the first antenna and the RF chip. When the second average packet loss rate is lower than both the first and third average packet loss rates, the control module controls the switch switching module to switch the electrical connection between the second antenna and the RF chip. When the third average packet loss rate is lower than both the first and second average packet loss rates, the control module controls the switch switching module to switch the electrical connection between the third antenna and the RF chip.

[0099] In one embodiment, when the antenna system includes a first antenna and a second antenna, a first average packet loss rate is calculated based on multiple packet loss rates of the first antenna communicating with the peer device, and a second average packet loss rate is calculated based on multiple packet loss rates of the second antenna communicating with the peer device. When the first average packet loss rate is lower than a first preset value, the control module controls the switch switching module to switch the first antenna to be electrically connected to the RF chip; when the second average packet loss rate is lower than the first preset value, the control module controls the switch switching module to switch the second antenna to be electrically connected to the RF chip. When both the first average packet loss rate and the second average packet loss rate are lower than the first preset value, the control module controls the switch switching module to switch either the first antenna or the second antenna to be electrically connected to the RF chip, specifically, the antenna currently communicating with the peer device can continue to communicate with the peer device.

[0100] When the antenna system includes a first antenna, a second antenna, and a third antenna, a first average packet loss rate is calculated based on multiple packet loss rates during communication between the first antenna and the peer device. A second average packet loss rate is calculated based on multiple packet loss rates during communication between the second antenna and the peer device. A third average packet loss rate is calculated based on multiple packet loss rates during communication between the third antenna and the peer device. When the first average packet loss rate is lower than a first preset value, the control module controls the switch switching module to switch the first antenna to be electrically connected to the RF chip. When the second average packet loss rate is lower than the first preset value, the control module controls the switch switching module to switch the second antenna to be electrically connected to the RF chip. When the third average packet loss rate is lower than the first preset value, the control module controls the switch switching module to switch the third antenna to be electrically connected to the RF chip. When all three average packet loss rates are lower than the first preset value, the control module controls the switch switching module to switch the first antenna, the second antenna, or the third antenna to be electrically connected to the RF chip. Specifically, the antenna currently communicating with the peer device can continue to communicate with the peer device.

[0101] Figure 15 is a flowchart illustrating one embodiment of the antenna switching method in this application. As shown in Figure 15, in a further embodiment, the antenna switching method monitors the signal strength of the antenna electrically connected to the RF chip communicating with the peer device; when the signal strength is greater than a second preset value, the transmit power of the RF chip is reduced. This reduces the power of wireless communication in the smart glasses, thereby further reducing the power consumption of the smart glasses.

[0102] In addition, this application also provides another antenna switching method for smart glasses, which is used to enable the antenna system of the smart glasses in any of the above embodiments to operate.

[0103] In one embodiment, the antenna switching method for the smart glasses includes:

[0104] Step S301: Monitor the signal strength of each of at least two antennas communicating with the peer device;

[0105] Step S302: The control switch module switches the antenna with the strongest signal strength for communication with the peer device to be electrically connected to the radio frequency chip.

[0106] When the antenna system includes a first antenna and a second antenna, the signal strength of the first antenna communicating with the peer device is the first signal strength, and the signal strength of the second antenna communicating with the peer device is the second signal strength. When the first signal strength is stronger than the second signal strength, the control module controls the switch switching module to switch the first antenna to be electrically connected to the RF chip; when the second signal strength is stronger than the first signal strength, the control module controls the switch switching module to switch the second antenna to be electrically connected to the RF chip.

[0107] When the antenna system includes a first antenna, a second antenna, and a third antenna, the signal strength of the first antenna communicating with the peer device is the first signal strength, the signal strength of the second antenna communicating with the peer device is the second signal strength, and the signal strength of the third antenna communicating with the peer device is the third signal strength. When the first signal strength is stronger than both the second and third signal strengths, the control module controls the switch switching module to switch the first antenna to electrical connection with the RF chip; when the second signal strength is stronger than both the first and third signal strengths, the control module controls the switch switching module to switch the second antenna to electrical connection with the RF chip; when the third signal strength is stronger than both the first and second signal strengths, the control module controls the switch switching module to switch the third antenna to electrical connection with the RF chip.

[0108] This solution enables smart glasses to maintain good wireless communication with peer devices located in different locations, with low power consumption and good communication performance.

[0109] Step S401: Monitor the signal strength of each of at least two antennas communicating with the peer device;

[0110] Step S402: The control switch module switches the antenna and radio frequency chip to a signal strength higher than the second preset value for communication with the peer device.

[0111] When the antenna system includes a first antenna and a second antenna, the signal strength of the first antenna communicating with the peer device is the first signal strength, and the signal strength of the second antenna communicating with the peer device is the second signal strength. When the first signal strength is stronger than a second preset value, the control module controls the switch switching module to switch the first antenna to be electrically connected to the RF chip; when the second signal strength is stronger than the second preset value, the control module controls the switch switching module to switch the second antenna to be electrically connected to the RF chip. When both the first and second signal strengths are stronger than the second preset value, the control module controls the switch switching module to switch either the first antenna or the second antenna to be electrically connected to the RF chip, specifically ensuring that the antenna currently communicating with the peer device continues to communicate with the peer device.

[0112] When the antenna system includes a first antenna, a second antenna, and a third antenna, the signal strength of the first antenna communicating with the peer device is the first signal strength, the signal strength of the second antenna communicating with the peer device is the second signal strength, and the signal strength of the third antenna communicating with the peer device is the third signal strength. When the first signal strength is stronger than a second preset value, the control module controls the switch switching module to switch the first antenna to be electrically connected to the RF chip; when the second signal strength is stronger than the second preset value, the control module controls the switch switching module to switch the second antenna to be electrically connected to the RF chip; when the third signal strength is stronger than the second preset value, the control module controls the switch switching module to switch the third antenna to be electrically connected to the RF chip. When the first, second, and third signal strengths are all stronger than the second preset value, the control module controls the switch switching module to switch the first, second, or third antenna to be electrically connected to the RF chip, specifically ensuring that the antenna currently communicating with the peer device continues to communicate with the peer device.

[0113] This enables smart glasses to maintain good wireless communication with peer devices located in different places, with low power consumption and good communication performance.

[0114] In a further embodiment, in order to improve detection accuracy, multiple signal strengths of each of the at least two antennas communicating with the peer device can be monitored, and an average signal strength can be calculated based on the multiple signal strengths to obtain the average signal strength of each of the at least two antennas.

[0115] The control switch module switches the antenna with the strongest average signal strength for communication with the peer device to be electrically connected to the RF chip; or, the control switch module switches the antenna with an average signal strength higher than a fourth preset value for communication with the peer device to be electrically connected to the RF chip.

[0116] Specifically, when the antenna system includes a first antenna and a second antenna, a first average signal strength is calculated based on multiple signal strengths from communication between the first antenna and the peer device, and a second average signal strength is calculated based on multiple signal strengths from communication between the second antenna and the peer device. When the first average signal strength is stronger than the second average signal strength, the control module controls the switch switching module to switch the first antenna to be electrically connected to the RF chip; when the second average signal strength is stronger than the first average signal strength, the control module controls the switch switching module to switch the second antenna to be electrically connected to the RF chip.

[0117] When the antenna system includes a first antenna, a second antenna, and a third antenna, a first average signal strength is calculated based on multiple signal strengths from communication between the first antenna and the peer device. A second average signal strength is calculated based on multiple signal strengths from communication between the second antenna and the peer device. A third average signal strength is calculated based on multiple signal strengths from communication between the third antenna and the peer device. When the first average signal strength is stronger than both the second and third average signal strengths, the control module controls the switch switching module to electrically connect the first antenna to the RF chip. When the second average signal strength is stronger than both the first and third average signal strengths, the control module controls the switch switching module to electrically connect the second antenna to the RF chip. When the third average signal strength is stronger than both the first and second average signal strengths, the control module controls the switch switching module to electrically connect the third antenna to the RF chip.

[0118] In one embodiment, when the antenna system includes a first antenna and a second antenna, a first average signal strength is calculated based on multiple signal strengths of the first antenna communicating with the peer device, and a second average signal strength is calculated based on multiple signal strengths of the second antenna communicating with the peer device. When the first average signal strength is stronger than a second preset value, the control module controls the switch switching module to switch the first antenna to be electrically connected to the RF chip; when the second average signal strength is stronger than the second preset value, the control module controls the switch switching module to switch the second antenna to be electrically connected to the RF chip. When both the first average signal strength and the second average signal strength are stronger than the second preset value, the control module controls the switch switching module to switch either the first antenna or the second antenna to be electrically connected to the RF chip, specifically, the antenna currently communicating with the peer device can continue to communicate with the peer device.

[0119] When the antenna system includes a first antenna, a second antenna, and a third antenna, a first average signal strength is calculated based on multiple signal strengths from communication between the first antenna and the peer device. A second average signal strength is calculated based on multiple signal strengths from communication between the second antenna and the peer device. A third average signal strength is calculated based on multiple signal strengths from communication between the third antenna and the peer device. When the first average signal strength is stronger than a second preset value, the control module controls the switch switching module to switch the first antenna to be electrically connected to the RF chip. When the second average signal strength is stronger than the second preset value, the control module controls the switch switching module to switch the second antenna to be electrically connected to the RF chip. When the third average signal strength is stronger than the second preset value, the control module controls the switch switching module to switch the third antenna to be electrically connected to the RF chip. When the first, second, and third average signal strengths are all stronger than the second preset value, the control module controls the switch switching module to switch the first, second, or third antenna to be electrically connected to the RF chip. Specifically, the antenna currently communicating with the peer device can continue to communicate with the peer device.

[0120] In a further embodiment, the antenna switching method described above monitors the signal strength of the antenna electrically connected to the RF chip communicating with the peer device; when the signal strength is greater than a second preset value, the output power of the RF chip is reduced. This reduces the power consumption of the smart glasses' wireless communication, thereby further reducing the power consumption of the smart glasses.

[0121] As shown in Figure 15, in one specific embodiment, during the operation of the antenna system, the packet loss rate (PER) of each antenna in at least two antennas communicating with the peer device can be monitored at first preset time intervals. The average packet loss rate (EPER) is calculated based on multiple packet loss rates, thus obtaining the average packet loss rate of each of the at least two antennas. Then, when the average packet loss rate of a certain antenna communicating with the peer device is lower than the first preset value, it is considered that the antenna can communicate well with the peer device, and the control switch module switches the antenna to electrical connection with the RF chip, making it a working antenna. The received signal strength indication (RSSI) of the working antenna communicating with the peer device is monitored at second preset time intervals. The average received signal strength indication (ERSSI) is calculated based on multiple received signal strength indications, thus obtaining the average received signal strength indication of the working antenna. When the average received signal strength indication is greater than the second preset value, it is considered that the signal strength is too high and may cause waste; at this time, the output power of the RF chip is reduced. Next, the power supply voltage of the power amplifier is reduced, that is, the voltage of the power supply connected to the power amplifier is reduced, and the error vector magnitude (EVM) is monitored. When the EVM is greater than the third preset value, the current voltage is maintained to ensure the normal operation of the power amplifier and to avoid waste.

[0122] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A type of smart glasses, characterized in that, The system includes eyeglasses, a neckband, and an antenna system. The eyeglasses and neckband are connected. The antenna system includes a switch module, a radio frequency chip, and at least two antennas. The at least two antennas include a first antenna and a second antenna, which are disposed at both ends of the neck ring along the extension direction. The switch switching module is electrically connected to the radio frequency chip and is respectively connected to the at least two antennas. The switch switching module is used to electrically connect the first antenna to the radio frequency chip, or to electrically connect the second antenna to the radio frequency chip.

2. The smart glasses as described in claim 1, characterized in that, The at least two antennas also include a third antenna, which is disposed on the neck ring and located between the first antenna and the second antenna. The switch module is also connected to the third antenna and is also used to electrically connect the third antenna to the radio frequency chip.

3. The smart glasses as described in claim 2, characterized in that, The distance between the third antenna and the first antenna is the same as the distance between the third antenna and the second antenna.

4. The smart glasses as described in claim 2 or 3, characterized in that, The neck ring has a first end face at one end along its extension direction and a second end face at the other end. The distance between the third antenna and the first end face is the same as the distance between the third antenna and the second end face.

5. The smart glasses as described in claim 1, characterized in that, It also includes a control module and a signal monitoring module. The signal monitoring module is used to monitor the packet loss rate and / or signal strength of each of the at least two antennas and the peer device. The control module is connected to the signal monitoring module and the switch switching module respectively. The control module is used to control the switch switching module to switch the first antenna or the second antenna to be electrically connected to the radio frequency chip according to the monitoring results of the signal monitoring module.

6. The smart glasses as described in any one of claims 2 to 4, characterized in that, It also includes a control module and a signal monitoring module. The signal monitoring module is used to monitor the packet loss rate and / or signal strength of each of the at least two antennas and the peer device. The control module is connected to the position module and the switch switching module respectively. The control module is used to control the switch switching module to switch the first antenna, the second antenna, or the third antenna to be electrically connected to the radio frequency chip according to the monitoring results of the signal monitoring module.

7. The smart glasses as described in claim 5 or 6, characterized in that, The signal monitoring module is used to monitor the packet loss rate of each of the at least two antennas communicating with the peer device, and the control module controls the switching module to switch the antenna with the lowest packet loss rate communicating with the peer device to be electrically connected to the radio frequency chip. Alternatively, the control module controls the switch module to switch the antenna and the radio frequency chip electrically connected when the packet loss rate of communication with the peer device is lower than a first preset value.

8. The smart glasses as described in claim 5 or 6, characterized in that, The signal monitoring module is used to monitor the signal strength of each of the at least two antennas communicating with the peer device, and the control module controls the switching module to switch the antenna with the strongest signal strength communicating with the peer device to be electrically connected to the radio frequency chip. Alternatively, the control module controls the switch module to switch the antenna and the radio frequency chip to an electrical connection when the signal strength for communication with the peer device is higher than a second preset value.

9. The smart glasses as described in any one of claims 1 to 8, characterized in that, The first antenna includes a first stub and a second stub, the length of the first stub is greater than the length of the second stub, the operating frequency of the first stub is between 2.4 GHz and 2.48 GHz, and the operating frequency of the second stub is between 5.1 GHz and 5.8 GHz. The second antenna includes a third stub and a fourth stub, the length of the third stub being greater than the length of the fourth stub, the operating frequency of the third stub being 2.4 GHz to 2.48 GHz, and the operating frequency of the fourth stub being 5.1 GHz to 5.8 GHz.

10. The smart glasses according to any one of claims 1 to 9, characterized in that, The first antenna and the second antenna are located on the flexible circuit board.

11. An antenna switching method for smart glasses, characterized in that, The method is applied to smart glasses as described in any one of claims 1 to 10, and the method includes: Monitor the packet loss rate of each of the at least two antennas in communication with the peer device; The switch module controls the switching of the antenna with the lowest packet loss rate that communicates with the peer device to be electrically connected to the radio frequency chip; Alternatively, the switch module can be controlled to switch the antenna communicating with the peer device with a packet loss rate lower than a first preset value to be electrically connected to the radio frequency chip.

12. The antenna switching method as described in claim 11, characterized in that, The method includes: Monitor multiple packet loss rates between each of the at least two antennas and the peer device, and calculate the average packet loss rate based on the multiple packet loss rates; The switch module controls the switching of the antenna with the lowest average packet loss rate that communicates with the peer device to be electrically connected to the radio frequency chip. Alternatively, the switch module can be controlled to switch the antenna communicating with the peer device with an average packet loss rate lower than a first preset value to be electrically connected to the radio frequency chip.

13. The antenna switching method as described in claim 11 or 12, characterized in that, The method includes: Monitor the signal strength of the antenna electrically connected to the radio frequency chip in communication with the peer device; When the signal strength is greater than the second preset value, the output power of the radio frequency chip is reduced.

14. An antenna switching method for smart glasses, characterized in that, The method is applied to smart glasses as described in any one of claims 1 to 10, and the method includes: Monitor the signal strength of each of the at least two antennas communicating with the peer device; The switch module can be controlled to switch the antenna with the strongest signal strength for communicating with the peer device to be electrically connected to the radio frequency chip; or, the switch module can be controlled to switch the antenna with a signal strength higher than a second preset value for communicating with the peer device to be electrically connected to the radio frequency chip.

15. The antenna switching method as described in claim 14, characterized in that, The method includes: Monitor the signal strengths of each of the at least two antennas communicating with the peer device, and calculate the average signal strength based on the multiple signal strengths; The switch module is controlled to switch the antenna with the strongest average signal strength for communicating with the peer device to be electrically connected to the radio frequency chip; or, the switch module is controlled to switch the antenna with an average signal strength higher than a fourth preset value for communicating with the peer device to be electrically connected to the radio frequency chip.

16. The antenna switching method as described in claim 14 or 15, characterized in that, The method includes: When the signal strength is greater than the second preset value, the output power of the radio frequency chip is reduced.

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