Control method, device and terminal device for reducing terminal device antenna interference

Abstract

The present invention discloses a control method, device and terminal device for reducing antenna interference of terminal equipment, wherein the terminal equipment is provided with a plurality of main antennas and sub-antennas corresponding to the frequency band of each main antenna, and the control method for reducing antenna interference of terminal equipment includes: detecting whether each main antenna of the terminal equipment is in an interference state; when a main antenna in an interference state is detected, adjusting the resonant frequency of the interfered main antenna based on the interference state of the interfered main antenna; or switching the interfered main antenna with the sub-antenna of the corresponding frequency band, so that the sub-antenna of the corresponding frequency band is used as a new main antenna for transmitting and receiving signals of the corresponding frequency band. When the antenna is interfered, the antenna performance will be reduced, and the scheme of the present invention can reduce the signal strength attenuation caused by the reduction of antenna performance, thereby ensuring that the terminal equipment has good communication quality.

Description

Technical Field

[0001] The present invention relates to the field of antennas, and in particular to a control method and device for reducing antenna interference of terminal equipment, and terminal equipment. Background Art

[0002] With the maturity and popularization of 5G technology, electronic devices have supported 5G frequency bands, and the number of antennas required has increased significantly, generally around 10 antennas. At the same time, because metal materials have the advantages of beautiful appearance, good feel, good heat dissipation and anti-drop, most electronic devices use metal casings. However, 5G communication uses a spectrum above 3Ghz, and its millimeter wave wavelength is very short. Metal materials will change the impedance of the electronic device antenna itself, absorb electromagnetic wave energy near the antenna, and shield electromagnetic wave signals, which will have a serious impact on the performance of the antenna. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a control method, device and terminal device for reducing the interference of the terminal device antenna, which is used to solve the problem that when the screen is rotated to a position close to the metal material, the antenna in the working state is interfered, the resonant frequency is shifted, and the performance is seriously reduced.

[0004] Specifically, the technical solution of the present invention is as follows:

[0005] In a first aspect, the present invention discloses a control method for reducing antenna interference of a terminal device, wherein the terminal device is provided with a plurality of main antennas and a secondary antenna corresponding to a frequency band of each main antenna, and the method comprises:

[0006] Detecting whether each main antenna of the terminal device is in an interference state;

[0007] When it is detected that there is a main antenna in an interference state, adjusting the resonant frequency of the interfered main antenna based on the interference state of the interfered main antenna; or

[0008] The interfered main antenna is switched with the secondary antenna of the corresponding frequency band, so that the secondary antenna of the corresponding frequency band serves as a new main antenna for transmitting and receiving signals of the corresponding frequency band.

[0009] In some implementations, the detecting whether the main antenna of the terminal device is in an interference state specifically includes:

[0010] Obtaining screen flip angle information of the terminal device;

[0011] Determine whether the angle of the screen after flipping is within a preset interference angle range; if so, determine that each main antenna of the terminal device is in an interference state.

[0012] In some implementations, the determining whether the angle of the screen after flipping is within a preset interference angle range; if so, determining that each main antenna of the terminal device is in an interference state specifically includes:

[0013] Determining whether the angle of the screen after flipping is within a preset first interference angle range;

[0014] When the angle of the screen after flipping is within a preset first angle range, it is determined that each main antenna of the terminal device is in a weak interference state;

[0015] Determining whether the angle of the screen after flipping is within a preset second interference angle range;

[0016] When the angle of the flipped screen is within a preset second angle range, it is determined that the main antenna at the designated position of the terminal device is in a strong interference state.

[0017] In some implementations, detecting whether each main antenna of the terminal device is in an interference state specifically includes:

[0018] Obtaining the signal strength of each main antenna of the terminal device;

[0019] According to the frequency band of each main antenna, find and obtain the strength threshold of each main antenna;

[0020] Whether each main antenna is in an interference state is determined by judging whether the signal strength of each main antenna is less than a strength threshold of a corresponding frequency band.

[0021] In some implementations, the step of searching and obtaining a strength threshold of each main antenna according to the frequency band of each main antenna specifically includes:

[0022] According to the frequency band of each main antenna, the corresponding strong interference threshold and weak interference threshold are searched from the pre-stored frequency band signal strength comparison table;

[0023] The method of determining whether each main antenna is in an interference state by determining whether the signal strength of each main antenna is less than the strength threshold of the corresponding frequency band specifically includes:

[0024] Determine whether the signal strength of the main antenna is less than the weak interference threshold of the corresponding frequency band and greater than the strong interference threshold; if so, determine that the main antenna is in a weak interference state; otherwise, further determine whether the signal strength of the main antenna is less than the strong interference threshold of the corresponding frequency band;

[0025] When the signal strength of the main antenna is less than a strong interference threshold of the corresponding frequency band, it is determined that the main antenna is in a strong interference state.

[0026] In some embodiments, the adjusting the resonant frequency of the interfered main antenna based on the interference state of the interfered main antenna; or switching the interfered main antenna with the secondary antenna of the corresponding frequency band so that the secondary antenna of the corresponding frequency band serves as a new main antenna for transmitting and receiving signals of the corresponding frequency band; specifically includes:

[0027] When the interfered main antenna is in a weak interference state, a matching capacitor or inductor on the interfered main antenna path is selected through a first radio frequency switch to adjust the resonant frequency of the interfered main antenna;

[0028] When the interfered main antenna is in a strong interference state, the interfered main antenna is switched with the secondary antenna of the corresponding frequency band through the second RF switch, so that the secondary antenna of the corresponding frequency band serves as a new main antenna to assist the communication module in sending and receiving signals of the corresponding frequency band.

[0029] In some implementations, the control method for reducing terminal device antenna interference further includes:

[0030] After detecting that the interfered main antenna switches with the secondary antenna of the corresponding frequency band, the RF end conduction power of the secondary antenna of the corresponding frequency band is increased, and the increased RF end conduction power value of the secondary antenna of the corresponding frequency band is not higher than the preset maximum power value of the corresponding frequency band.

[0031] On the other hand, the present application also discloses a control device for reducing antenna interference of a terminal device, which is applied to a terminal device, wherein the terminal device is provided with a plurality of main antennas and a secondary antenna corresponding to a frequency band of each main antenna, and the control device comprises:

[0032] An interference detection module, used to detect whether each main antenna of the terminal device is in an interference state;

[0033] A switching adjustment module is used to adjust the resonant frequency of the interfered main antenna based on the interference state of the interfered main antenna when a main antenna in an interference state is detected; or to switch the interfered main antenna with a secondary antenna of a corresponding frequency band so that the secondary antenna of the corresponding frequency band serves as a new main antenna for transmitting and receiving signals of the corresponding frequency band.

[0034] In some implementations, the interference detection module specifically includes:

[0035] An angle acquisition unit, used to acquire screen flip angle information of the terminal device;

[0036] The first interference judgment unit is used to judge whether the angle of the screen after flipping is in a preset first interference angle range; if so, it is judged that the main antennas of the terminal device are in a weak interference state; otherwise, it is further judged whether the angle of the screen after flipping is in a preset second interference angle range; if the angle of the screen after flipping is in the preset second angle range, it is judged that the main antenna at the designated position of the terminal device is in a strong interference state.

[0037] In some implementations, the interference detection module specifically includes:

[0038] A threshold search unit, used to query the corresponding strong interference threshold and weak interference threshold from a pre-stored frequency band signal strength comparison table according to the frequency band of each main antenna;

[0039] The second interference judgment unit is used to judge whether the signal strength of the main antenna is less than the weak interference threshold of the corresponding frequency band and greater than the strong interference threshold; if so, it is judged that the main antenna is in a weak interference state; otherwise, it is further judged whether the signal strength of the main antenna is less than the strong interference threshold of the corresponding frequency band; if the signal strength of the main antenna is less than the strong interference threshold of the corresponding frequency band, it is judged that the main antenna is in a strong interference state.

[0040] In some implementations, the switching adjustment module specifically includes:

[0041] A frequency adjustment unit, configured to select a matching capacitor or inductor on a path of the interfered main antenna through a first radio frequency switch to adjust the resonant frequency of the interfered main antenna when the interfered main antenna is in a weak interference state;

[0042] The antenna switching unit is used to switch the interfered main antenna with the secondary antenna of the corresponding frequency band through a second RF switch when the interfered main antenna is in a strong interference state, so as to receive and send signals of the corresponding frequency band through a new main antenna auxiliary communication module composed of the corresponding secondary antenna.

[0043] In some implementations, the control device for reducing terminal device antenna interference further includes:

[0044] The power increasing module is used to increase the RF end conduction power of the secondary antenna of the corresponding frequency band after detecting that the interfered main antenna switches with the secondary antenna of the corresponding frequency band; and the increased RF end conduction power value of the secondary antenna of the corresponding frequency band is not higher than the preset maximum power value of the corresponding frequency band.

[0045] On the other hand, the present application also discloses a terminal device, including:

[0046] A base, wherein a first column is provided on the base;

[0047] A rotatable main screen is arranged on the first column; a plurality of main antennas are arranged above the main screen, and a plurality of sub-antennas of different frequency bands are arranged on both sides of the main screen; and each main antenna and the sub-antenna of the corresponding frequency band are connected to the communication module of the chip through a second radio frequency switch;

[0048] The terminal device is also integrated with any of the above-mentioned control devices for reducing antenna interference of the terminal device.

[0049] In some embodiments, the terminal device further includes: a second column, the second column is arranged on the first column; and a secondary screen located on the second column.

[0050] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0051] 1. In this application, when the main antenna of the terminal device is interfered with (such as interference from metal materials), the interfered main antenna and the secondary antenna of the corresponding frequency band will be switched through the RF switch, so that the secondary antenna of the corresponding frequency band is used as the new main antenna to send and receive signals of the corresponding frequency band. Or the resonant frequency of the interfered antenna is adjusted to the required frequency point (which can be achieved by connecting a suitable capacitor or inductor), which reduces the impact of interference on antenna performance, avoids message delays or failure to send due to poor communication during user use, and improves the user experience.

[0052] 2. This application will also determine whether the main antenna is in a strong interference or weak interference state based on the flip angle information of the terminal device screen or the signal strength of the main antenna, and set corresponding solutions based on different interference states. For example, when the interfered main antenna is in a strong interference state, the interfered main antenna is switched with the sub-antenna of the corresponding frequency band, and the signal of the frequency band is received and transmitted through the new main antenna composed of the sub-antenna of the corresponding frequency band; when the interfered main antenna is in a weak interference state, the capacitor or inductor on the interfered main antenna path is switched through the RF switch to adjust its resonant frequency to the required frequency. Different switching schemes can more accurately improve the performance of the antenna, allowing the terminal device to minimize interference while minimizing power consumption.

[0053] 3. In this application, since the secondary antennas on both sides of the screen have worse performance than the main antenna at the top of the screen, when the interfered main antenna is switched to the secondary antenna of the corresponding frequency band, so that the secondary antenna of the corresponding frequency band is used as the new main antenna to send and receive signals in the corresponding frequency band, the conduction power of the secondary antenna of the corresponding frequency band will be enhanced through the chip, thereby reducing the poor communication problem caused by the poor performance of the secondary antenna itself, and ensuring that the terminal device has good communication quality under different switching modes. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0055] Figure 1 A flow chart of an embodiment of a control method for reducing antenna interference of a terminal device according to the present invention;

[0056] Figure 2 A schematic diagram of interference to the main screen of a cash register device with dual screens in one embodiment of a control method for reducing antenna interference of a terminal device of the present invention;

[0057] Figure 3 A schematic diagram of interference to the main screen of a cash register device with a single screen configuration in one embodiment of a control method for reducing antenna interference of a terminal device of the present invention;

[0058] Figure 4 A flow chart of another embodiment of a control method for reducing antenna interference of a terminal device according to the present invention;

[0059] Figure 5 A flow chart of another embodiment of a control method for reducing antenna interference of a terminal device according to the present invention;

[0060] Figure 6 A block diagram of an embodiment of a control device for reducing antenna interference of a terminal device according to the present invention;

[0061] Figure 7 A block diagram of another embodiment of a device for reducing power consumption of a terminal device according to the present invention;

[0062] Figure 8a A specific structural diagram of an embodiment of a control device for reducing antenna interference of a terminal device according to the present invention;

[0063] Figure 8b Another specific structural diagram of an embodiment of a control device for reducing antenna interference of a terminal device according to the present invention;

[0064] Fig. 9 A block diagram of another embodiment of a control device for reducing antenna interference of a terminal device according to the present invention;

[0065] Fig.10a A specific structural diagram of a single-screen configuration of a terminal device of the present invention;

[0066] Fig.10b A specific structural diagram of a dual-screen configuration of a terminal device of the present invention;

[0067] Fig.10c A schematic diagram of antenna settings on a terminal device of the present invention.

[0068] Description of Figure Numbers:

[0069] 10--interference detection module; 11--first acquisition submodule; 12--interference detection module; 121--angle judgment unit; 122--first interference judgment unit; 13--second acquisition submodule; 14--second judgment submodule; 141--power judgment unit; 142--second interference judgment unit; 20--switching adjustment module; 30--power increase module 40--main screen; 50--base; 60--rotating shaft; 70--first column; 80 --The second column; 90--Secondary screen; 100--Gyro sensor; 110--Communication chip; 120--RF circuit; 130--First RF switch; 140--Capacitor; 150--Inductor; 160--Main antenna; 170--Secondary antenna; 180--Second RF switch; Ant1--Main antenna; Ant2--Main antenna; Ant5--Secondary antenna; Ant6--Secondary antenna; Ant7--Secondary antenna; Ant8--Secondary antenna. DETAILED DESCRIPTION

[0070] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0071] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0072] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0073] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0074] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0075] In the embodiment of the present invention, the terminal device can be a desktop payment device, a mobile phone, a tablet computer, a laptop computer, a PDA, a navigation device, a wearable device, a smart bracelet, a pedometer, or other terminal devices.

[0076] Embodiment 1

[0077] In one embodiment, the reference specification Figure 1 The present invention provides a control method for reducing antenna interference of a terminal device, wherein the terminal device is provided with a plurality of main antennas and a secondary antenna corresponding to a frequency band of each main antenna; the control method for reducing antenna interference of the terminal device comprises:

[0078] S101 detects whether each main antenna of the terminal device is in an interference state;

[0079] S102: When it is detected that there is a main antenna in an interference state, the resonant frequency of the interfered main antenna is adjusted based on the interference state of the interfered main antenna; or the interfered main antenna is switched with the secondary antenna of the corresponding frequency band so that the secondary antenna of the corresponding frequency band serves as a new main antenna for transmitting and receiving signals of the corresponding frequency band.

[0080] Taking a desktop payment device as an example to illustrate this embodiment, a dual-screen design is often used in desktop payment devices, and the secondary screen is made detachable, so there are two versions for users to choose from: a dual-screen version and a single-screen version. In order to accommodate cashiers of different heights or to more conveniently display shopping information on the screen to consumers, the main screen of the payment device will be designed to be flippable. At the same time, in order to increase the texture and beauty of the product, high-end desktop payment devices will use a lot of metal materials in the base, columns, and the back cover of the main screen and secondary screen.

[0081] Generally, the clearance area at the top of the device's screen is larger, and the antenna performance is relatively better, so the main transmitting and receiving antennas are designed at the top of the screen, and the auxiliary transmitting and receiving antennas are designed on both sides of the screen. In a device, there are usually multiple main antennas and sub-antennas corresponding to the frequency band of each main antenna. Specifically, each antenna has a supported frequency band; the correspondence between the main antenna and the sub-antenna is based on the frequency band supported by the antenna. Each frequency band of the main antenna has a corresponding sub-antenna. For example, the frequency band of a main antenna may be satisfied by several sub-antennas, that is, a single sub-antenna may only have a part of the frequency band of the main antenna, and each main antenna corresponds to several sub-antennas. This application does not limit the number of sub-antennas corresponding to the frequency band of the main antenna. A main antenna can correspond to one sub-antenna or multiple sub-antennas.

[0082] In a dual-screen desktop payment device, such as Figure 2 As shown in , when the main screen is flipped to be very close to the secondary screen, the antenna close to the secondary screen will be interfered by the metal material; in a desktop payment device with a single screen configuration, such as Figure 3 As shown, when the main screen flips to 160° to display the shopping information on the screen to consumers, the metal pillars very close to the main screen will interfere with the antenna. After the antenna is interfered with, the resonant frequency shifts and the performance is seriously reduced, resulting in attenuation of the transmitted and received signal strengths. Consumers will face payment delays or unsuccessful payments when making online payments. Therefore, first check whether the main antenna is in an interference state. When it is determined that there is a main antenna in an interference state, adjust the resonant frequency of the interfered main antenna (for example, through an RF switch connected to the interfered main antenna, switch the interfered main antenna to the sub-antenna of the corresponding frequency band. Specifically, if there are multiple sub-antennas corresponding to the frequency band, all sub-antennas of the frequency band need to be used as the main antenna of the frequency band, or switch the appropriate capacitor or inductor on the path to the interfered main antenna to adjust the resonant frequency of the main antenna to the required frequency point. The performance of the antenna is improved in the above manner.

[0083] After detecting the interfered main antenna, this embodiment switches the interfered main antenna with the sub-antenna of the corresponding frequency band through the RF switch, so that the sub-antenna of the corresponding frequency band serves as the new main antenna to receive and send signals of the corresponding frequency band. Specifically, if there are multiple sub-antennas of the corresponding frequency band, all sub-antennas of the frequency band need to be used as new main antennas to receive and send signals of the frequency band. Alternatively, the resonant frequency of the antenna is adjusted to the required frequency point to reduce the impact of interference on the antenna performance, avoid payment delays or inability to pay due to poor communication during user use, and improve the user experience.

[0084] Embodiment 2

[0085] This embodiment mainly focuses on the interference detection of the main antenna in the above embodiment. Specifically, in the above embodiment, step S101 detects whether each main antenna of the terminal device is in an interference state; specifically, it includes:

[0086] Obtaining screen flip angle information of the terminal device;

[0087] Determine whether the angle of the screen after flipping is within a preset interference angle range, and if so, determine that each main antenna of the terminal device is in an interference state.

[0088] In this solution, the screen flip angle can be detected to determine whether the main antenna is in an interference state; specifically, after the terminal device screen is flipped, it may be close to the secondary screen, or close to the metal pillars and other structures of the terminal device, thereby affecting the antenna performance. Generally, the secondary screen or metal pillar is in a relatively fixed position, and the main antenna of the terminal device is generally set in a fixed position of the terminal device (such as above the main screen). Therefore, it is possible to determine whether the main antenna of the terminal device is in an interference state by simply flipping the screen. Of course, even if the secondary screen is not fixed, the relative position or angle between the main screen and the secondary screen can be determined by collecting the flip angle of the main and secondary screens, thereby determining whether the secondary screen causes interference to the main antenna on the main screen.

[0089] Furthermore, different flip angles may result in different interference scenarios for the terminal device. Therefore, the specific interference situation can be further determined based on the flip angle, and different anti-interference measures can be adopted based on different interference situations. Figure 4 , a control method for reducing antenna interference of a terminal device provided by the present invention comprises:

[0090] S201 obtains screen flip angle information of the terminal device;

[0091] Specifically, the sensor for obtaining the angle information of the screen flipping may be a gyroscope sensor, which may be arranged on the screen or on a rotating shaft connecting the main screen and the column. When the cashier rotates the screen, the sensor collects the angle information and then transmits it to the communication chip connected thereto.

[0092] S202 determines whether the angle of the screen after flipping is within a preset first interference angle interval, if so, proceeds to step S203; if not, proceeds to step S205;

[0093] S203 determines that each main antenna of the terminal device is in a weak interference state;

[0094] S204: selecting, through a first radio frequency switch, a matching capacitor or inductor on the interfered main antenna path to adjust the resonant frequency of the main antenna;

[0095] Specifically, after receiving the angle information, the communication chip determines whether the angle is in the preset first interference angle range. Specifically, when the main screen is close to the secondary screen, the metal on the secondary screen causes less interference to the antenna, so it can be determined that the main antenna on the main screen is in a weak interference state. Therefore, the first interference angle range can be set according to the angle range of the main screen when the main screen is close to the secondary screen. For example, the first interference angle range is set to 50°~55°, that is, when the angle between the back of the main screen and the horizontal plane is in the range of 50°~55°, the main screen is close to the secondary screen, and the main antenna on the main screen is in a weak interference state.

[0096] The other path on the communication chip end is connected to the RF circuit and the RF switch. The RF switch can be a single-pole four-throw or a single-pole multi-throw. At the same time, the antenna can also have multiple paths. The capacitor or inductor on the path can change the antenna frequency. When the main antenna on the main screen is in a weak interference state, select a suitable capacitance value or inductance value to adjust the resonant frequency of the antenna affected by weak interference to the required frequency point, reducing the impact of the secondary screen on the performance of the main antenna.

[0097] S205 determines whether the angle of the screen after flipping is within a preset second interference angle range, and if so, proceeds to step S206;

[0098] S206: Determine that the main antenna at the designated location of the terminal device is in a strong interference state;

[0099] S207: Switching the interfered main antenna to a secondary antenna of a corresponding frequency band through a second radio frequency switch, so as to assist the communication module in sending and receiving signals through the corresponding secondary antenna;

[0100] Specifically, if the angle of the screen after flipping is in the second interference angle range, the main antenna on the main screen is close to the metal column, and the metal column will cause strong interference to the main antenna; for example, when the angle between the back of the screen and the horizontal plane is 160°~165° after the main screen is flipped, and the main screen is close to the column, the second interference angle range can be set to 160°~165°. As long as it is detected that the angle of the screen after flipping is in the second interference angle range, it can be determined that the screen is close to the metal column, and then it can be determined that the main antenna at the designated position of the terminal device is subject to strong interference. Since the metal column of the terminal device is fixed, the main antenna close to the metal column after flipping can also be determined. For devices with larger screens, not all main antennas will be subject to strong interference, but only the main antenna at the designated position will be close to the metal column after flipping and subject to strong interference. Of course, the setting of the second interference angle range for different devices may also be different, and it can be set according to actual conditions. When the screen flip angle falls into the second interference angle range, the communication chip determines that the main antenna at the designated position of the terminal device is in a strong interference state, and the switching capacitor or inductor can no longer adjust the resonant frequency of the interfered main antenna to a suitable frequency point. In order to ensure the stability of the cash register signal, the second RF switch is used to switch to the secondary antenna of the corresponding frequency band of the interfered main antenna to send and receive signals, because the secondary antenna is generally located in the clear space on the side of the main screen and is less interfered than the main antenna.

[0101] Preferably, when the angle of the screen after flipping is within a preset interference angle range and the main antenna in strong interference is determined, the main antenna in weak interference is determined based on the position of the main antenna in strong interference. Specifically, for example, when the screen is flipped close to a metal column, the main antenna in the middle area above the screen is in a strong interference state, and the farther the main antenna is from the middle area above the screen, the less interference it receives, and the installation position of each main antenna is fixed, so the main antenna in weak interference can be determined based on the position of the main antenna in a strong interference state.

[0102] The advantage of this embodiment is that it determines whether each main antenna is in a strong interference or weak interference state based on the flip angle information of the terminal device screen, and sets corresponding solutions based on different interference states. When the main antenna is in a strong interference state, the corresponding secondary antenna is switched to receive and transmit signals; when the main antenna is in a weak interference state, the capacitor or inductor on the main antenna path is switched through the RF switch to adjust its resonant frequency to the required frequency. Different switching schemes can more accurately improve the performance of the antenna, allowing the terminal device to minimize power consumption while maximizing interference.

[0103] Embodiment 3

[0104] Based on the first embodiment, this embodiment determines whether the main antenna is in an interference state by detecting the signal strength of each main antenna. Specifically, detecting whether each main antenna of the terminal device is in an interference state specifically includes:

[0105] Obtaining the signal strength of each main antenna of the terminal device;

[0106] According to the frequency band of each main antenna, find and obtain the strength threshold of each main antenna;

[0107] Whether each main antenna is in an interference state is determined by judging whether the signal strength of each main antenna is less than a strength threshold of a corresponding frequency band.

[0108] Specifically, each main antenna has a corresponding frequency band, and different frequency bands correspond to different signal strength thresholds.

[0109] Preferably, the more the signal strength is attenuated, the greater the interference is. Therefore, different strength thresholds can be set to distinguish the strength of the interference. Figure 5 As shown, the control method for reducing antenna interference of a terminal device in this embodiment includes:

[0110] S301 obtains the signal strength of each main antenna of the terminal device;

[0111] S302 searches a pre-stored frequency band signal strength comparison table for a corresponding strong interference threshold and a weak interference threshold according to the frequency band of each main antenna;

[0112] S303 determines whether the signal strength of the main antenna is less than the weak interference threshold of the corresponding frequency band and greater than the strong interference threshold; if so, proceeds to step S304; otherwise, proceeds to step S305;

[0113] S304 determines that the main antenna is in a weak interference state; proceeds to step S308;

[0114] S305 determines whether the signal strength of the main antenna is less than the strong interference threshold of the corresponding frequency band; if so, proceeds to step S306;

[0115] S306 determines that the main antenna is in a strong interference state; proceeds to step S307;

[0116] S307: switching the interfered main antenna with the secondary antenna of the corresponding frequency band through the second radio frequency switch, so that the secondary antenna of the corresponding frequency band serves as a new main antenna to assist the communication module in transmitting and receiving signals of the corresponding frequency band;

[0117] S308 selects a matching capacitor or inductor on the interfered main antenna path through a first radio frequency switch to adjust the resonant frequency of the interfered main antenna.

[0118] Specifically, the signal strength of the main antenna in different frequency bands is different in the non-interference state, weak interference state and strong interference state. For example, in the WCDMA frequency band, the signal strength of the main antenna is generally about 18dBm without interference. If the main antenna is interfered, the received signal strength is lower than 16.5dBm but higher than 15dBm, then the main antenna is determined to be in a weak interference state; if its signal strength is lower than 15dBm, then the main antenna is determined to be in a strong interference state. Exemplarily, the frequency band signal strength comparison table is shown in Table 1 below:

[0119] Table 1 Frequency band signal strength comparison table

[0120]

[0121] S309 increases the conduction power of the secondary antenna at the radio frequency end.

[0122] Specifically, the signal strength value of the main antenna of the terminal device is detected to determine whether the antenna is interfered. Taking a desktop cash register device as an example, for example, the weak interference threshold of the main antenna of the GSM 900 frequency band is set to 25.5dBm, and the strong interference threshold is set to 24dBm. When the signal strength of the main antenna of the frequency band is detected to be lower than 25.5dBm but higher than 24dBm, the main antenna is in a weak interference state, and the capacitor or inductor on the main antenna path is switched to adjust its resonant frequency to the required frequency point to reduce the frequency deviation caused by interference; when the signal strength of the main antenna is detected to be lower than 24dBm, the main antenna is in a strong interference state, and the ability to receive and transmit signals is greatly weakened. The main antenna is switched with the secondary antenna of the corresponding frequency band through the RF switch, so that all the secondary antennas of the frequency band are used as the main antenna to assist the communication module in sending and receiving signals of the GSM 900 frequency band. Of course, if the signal strength of the main antenna is detected to be around 27dBm, it can be determined that the main antenna is in a non-interference state.

[0123] The correspondence between the main antenna and the secondary antenna has been set during development. Usually, the main antenna is located above the screen and the secondary antenna is located on the side of the screen. Even in the absence of interference, the signal transmission of the secondary antenna on the side is weaker than that of the main antenna. Preferably, in order to ensure that the terminal device always has good communication quality, when the secondary antenna of the corresponding frequency band on the side is switched to the working main antenna, the communication chip connected to it will output a signal to the RF circuit to increase the conducted power of all secondary antennas in the frequency band.

[0124] Similarly, antennas in different frequency bands have different standard values ​​and maximum power values ​​for conducted power. In general, the transmission power of antennas in each frequency band is set according to the conducted power certification standard value. If the secondary antenna is switched to the main antenna to send and receive signals in the corresponding frequency band, the conducted power value of the secondary antenna in the frequency band can be appropriately increased, but the larger the better. In principle, the increased conducted power is not higher than the maximum power value of the corresponding frequency band. Specifically, the conducted power certification standards and maximum power values ​​of different frequency bands are shown in Table 2 below.

[0125] Table 2 Comparison of conducted power in different frequency bands

[0126] Frequency band Conducted power certification standard (dBm) Maximum power(dBm) GSM900 33±2 35 GSM1800 30±2 32 WCDMA 23±2 25 LTE-FDD 23±2.7 25.7 LTE-TDD 23±2.7 25.7

[0127] Let's take the LTE-TDD band as an example. If it is detected that the main antenna of this band is subject to strong interference, all the sub-antennas of this band will be switched with the main antenna, and all the sub-antennas of this band will be used as the main working antenna (new main antenna) to transmit and receive signals of this band. In general, the sub-antennas of this band are generally located on the side of the screen, so the performance of each sub-antenna of this band is worse than that of the main antenna at the top of the screen. Therefore, when the working antenna of this band connected to the communication module of the terminal device is switched from the main antenna located above the screen to the sub-antenna of the corresponding band located on the side of the screen, the conduction power of each sub-antenna of this band will be enhanced. Of course, the increased conduction power does not exceed the maximum power of the corresponding band, thereby reducing the communication problems caused by the poor performance of the sub-antenna itself, and ensuring that the terminal device has good communication quality under different switching modes.

[0128] Embodiment 4

[0129] Based on the same technical concept, the present invention also discloses a control device for reducing antenna interference of a terminal device. The device can use any of the above-mentioned control method embodiments for reducing antenna interference of a terminal device to reduce antenna interference. Specifically, a control device for reducing antenna interference of a terminal device in this embodiment is applied to a terminal device. The terminal device is provided with a plurality of main antennas and a secondary antenna corresponding to a frequency band of each main antenna. The control device for reducing antenna interference of a terminal device in this embodiment is as follows: Figure 6 As shown, including:

[0130] An interference detection module 10 is used to detect whether the main antenna of the terminal device is in an interference state;

[0131] The switching adjustment module 20 is used to adjust the resonant frequency of the interfered main antenna based on the interference state of the interfered main antenna when a main antenna in an interference state is detected; or to switch the interfered main antenna with the secondary antenna of the corresponding frequency band so that the secondary antenna of the corresponding frequency band serves as a new main antenna for transmitting and receiving signals of the corresponding frequency band.

[0132] Specifically, a terminal device may contain multiple main antennas. When the interference detection module 10 detects that the main antenna of the terminal device is in an interference state, it further locates the interfered main antenna, and the main antenna that is not interfered with continues to receive and send signals normally. The switching adjustment module 20 switches the interfered main antenna with the secondary antenna of the corresponding frequency band through the first RF switch, so as to assist the communication module in receiving and sending signals through the secondary antenna of the corresponding frequency band; or adjusts the resonant frequency of the interfered main antenna to reduce the interference effect of the main antenna.

[0133] The advantage of this embodiment is that it detects the working status of the main antenna of the terminal device and determines the interference situation of the main antenna, and reduces the antenna interference by adjusting the resonant frequency of the main antenna or switching the working antenna electrically connected to the communication module from the main antenna to a secondary antenna of the corresponding frequency band, thereby ensuring the maximization of the antenna radiation efficiency and avoiding the situation where the terminal device has no signal or signal delay.

[0134] Embodiment 5

[0135] In one embodiment, the reference specification Figure 7 The present invention provides a control device for reducing antenna interference of a terminal device. Based on the fourth embodiment, the interference detection module 10 includes:

[0136] Angle acquisition unit 11, used to acquire screen flip angle information of the terminal device;

[0137] The first interference judgment unit 12 is used to judge whether the angle of the screen after flipping is in a preset first interference angle range; if so, it is judged that the main antennas of the terminal device are in a weak interference state; otherwise, it is further judged whether the angle of the screen after flipping is in a preset second interference angle range; if the angle of the screen after flipping is in the preset second angle range, it is judged that the main antenna at the designated position of the terminal device is in a strong interference state.

[0138] The switching adjustment module 20 specifically includes:

[0139] The frequency adjustment unit 21 is used to select a matching capacitor or inductor on the path of the interfered main antenna through a first radio frequency switch to adjust the resonant frequency of the interfered main antenna when the interfered main antenna is in a weak interference state;

[0140] The antenna switching unit 22 is used to switch the interfered main antenna with the secondary antenna of the corresponding frequency band through the second RF switch when the interfered main antenna is in a strong interference state, so as to receive and send signals of the corresponding frequency band through the new main antenna auxiliary communication module composed of the corresponding secondary antenna.

[0141] Specifically, Figure 8a As shown in FIG. 8b, the angle acquisition unit 11 can realize angle detection through the gyroscope sensor 100. When the screen is flipped, the angle acquisition unit 11 detects the angle information of the screen flipping of the terminal device. The gyroscope sensor is connected to the communication chip 110. The RF circuit 120 and the first RF switch 130 are connected on another path at the chip end. The RF switch 130 can be a single-pole double-throw switch or a single-pole four-throw switch, etc., depending on the number of inductors or capacitors set. There are two paths on the main antenna 160. When the gyroscope sensor detects that the main screen is flipped to the first angle range, the first interference determination unit 122 (which can be set in the communication chip 110) determines that the main antenna is in a weak interference state, and then selects a suitable capacitor 140 or inductor 150 on the path of the main antenna 160 through the first RF switch 130 to change the antenna frequency, and adjusts the resonant frequency of the main antenna 160 to the required frequency point to reduce the influence of metal on the performance of the main antenna 160. When the gyro sensor 100 detects that the main screen is flipped to the second angle range, the first interference determination unit 122 determines that the main antenna 160 is in a strong interference state, and the second RF switch 180 can be switched to connect to the secondary antenna 170 of the frequency band corresponding to the strong interference main antenna 160 (only one secondary antenna is shown as an example in the figure).

[0142] Preferably, the control device of this embodiment also includes: a power increasing module 30, which is used to increase the RF end conduction power of the corresponding secondary antenna after detecting that the antenna connected to the communication module of the terminal device is switched from the main antenna to the corresponding secondary antenna.

[0143] Since the secondary antenna of the terminal device has weak signal transmission and emission capabilities, in order to ensure that the terminal device has good communication quality, the power boost module (which can be integrated into the communication chip) will output a control signal to increase the RF end conduction power of the secondary antenna. Of course, the increased conduction power cannot be greater than the maximum conduction power of the corresponding frequency band.

[0144] The advantage of this embodiment is that the angle information of the screen flipping of the terminal device is obtained through the gyro sensor 100, and the method is easy to implement. The interference state of the main antenna 160 is judged according to the angle information, and different switching methods are adopted according to different interference states, so as to more accurately reduce the interference of the metal material to the main antenna 160. And considering that the performance of the secondary antenna 170 is weaker than that of the main antenna 160, the RF end conduction power of the secondary antenna 170 is increased by software. The problem of signal strength attenuation caused by the reduction of antenna performance is solved, and the stability of the terminal device signal is ensured.

[0145] Embodiment 6

[0146] In one embodiment, the present invention provides an embodiment of a control device for reducing antenna interference of a terminal device, based on the fourth embodiment, such as Fig. 9 As shown, the interference detection module 10 specifically includes:

[0147] The threshold search unit 13 is used to query the corresponding strong interference threshold and weak interference threshold from the pre-stored frequency band signal strength comparison table according to the frequency band of each main antenna;

[0148] The second interference judgment unit 14 is used to judge whether the signal strength of the main antenna is less than the weak interference threshold of the corresponding frequency band and greater than the strong interference threshold; if so, it is judged that the main antenna is in a weak interference state; otherwise, it is further judged whether the signal strength of the main antenna is less than the strong interference threshold of the corresponding frequency band; when the signal strength of the main antenna is less than the strong interference threshold of the corresponding frequency band, it is judged that the main antenna is in a strong interference state.

[0149] Specifically, this embodiment uses the method of monitoring the signal strength of the main antenna to determine whether the main antenna is in an interference state. Furthermore, two different power thresholds are set to further distinguish the strength of the interference. When the signal strength value of the main antenna is lower than the weak interference threshold and higher than the strong interference threshold, it means that the main antenna is in a weak interference state, and the capacitor or inductor matching the main antenna path is selected through the first RF switch to adjust the resonant frequency of the main antenna; when the conduction power value of the main antenna RF end is lower than the strong interference threshold, the main antenna is in a strong interference state, and the interfered main antenna is switched with the secondary antenna of the corresponding frequency band through the second RF switch.

[0150] The advantage of this embodiment is that different interference states of the main antenna are determined according to the signal strength of the main antenna. This monitoring method is more sensitive and accurate. It distinguishes strong interference from weak interference, adopts corresponding anti-interference methods, solves the signal instability problem caused by reduced antenna performance, and avoids the situation where the terminal device message is delayed or the message cannot be sent.

[0151] Finally, the present invention also discloses a terminal device, wherein the terminal device comprises the control device for reducing antenna interference of the terminal device as described in any one of the present inventions.

[0152] like Fig.10a The terminal device shown in the figure has a base 50, a first column 70 is provided on the base 50, and a rotating shaft 60 is provided on the first column 70. The main screen 40 is connected to the rotating shaft 60. The main screen 40 can rotate, which can adapt to cashiers of different heights. At the same time, it is also convenient to show the bill on the screen to the customer. Fig.10cMain antennas Ant1 and Ant2 are arranged above the main screen 40, and several sub-antennas corresponding to the frequency bands of the main antennas are arranged on both sides of the main screen, for example, sub-antennas Ant5 and Ant6 corresponding to the frequency band of the main antenna Ant1; and sub-antennas Ant7 and Ant8 corresponding to the frequency band of the main antenna Ant2. Since the clearance area at the upper end of the device's screen is larger and the antenna performance is relatively better, the main transmitting and receiving antenna (main antenna) is designed at the upper end of the screen, and the auxiliary transmitting and receiving sub-antennas are designed on both sides of the screen. Of course, the number and specific positions of the main antennas and sub-antennas can be set according to the actual conditions of different terminal devices, and each main antenna and the sub-antenna of the corresponding frequency band are connected to the communication module of the chip through the second RF switch.

[0153] In some embodiments, Fig.10b As shown, the terminal device is also provided with a secondary screen 90, on which no antenna is provided, and the secondary screen 90 is connected to the second column 80, which is located on the first column 70. When the cashier is settling for the customer, the secondary screen can synchronously display the content on the main screen, and the customer can check the bill without the cashier turning over the main screen, which improves the cashier efficiency and enables the customer to see the cashier process more transparently.

[0154] Since the terminal device is also provided with the control device for reducing the interference of the terminal device antenna of the present application, when the main antenna connected to the communication module of the terminal device is interfered by the metal material, it will switch to the corresponding secondary antenna through the radio frequency switch or adjust the resonant frequency of the antenna to the required frequency by connecting a suitable capacitor or inductor, thereby reducing the influence of the metal material of the terminal device on the antenna performance, avoiding message delays or failure to send due to poor communication during user use, and improving the user experience.

[0155] The control method, device and terminal device for reducing antenna interference of terminal equipment of the present invention have the same technical concept, and the technical details of the three embodiments are applicable to each other. In order to reduce repetition, they will not be described again.

[0156] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A control method for reducing antenna interference of a terminal device, wherein the terminal device comprises a flip-up screen, a plurality of main antennas are arranged at the upper end of the screen, and a secondary antenna corresponding to the frequency band of each main antenna is arranged on the side of the screen, characterized in that: The control method for reducing the interference of the terminal device antenna includes: Obtaining flip angle information of the screen; Determining whether the angle of the screen after flipping is within a preset first interference angle range; When the angle of the screen after flipping is within a preset first angle range, it is determined that each main antenna of the terminal device is in a weak interference state; Determining whether the angle of the screen after flipping is within a preset second interference angle range; When the angle of the flipped screen is within a preset second angle interval, determining that the main antenna at the designated position of the terminal device is in a strong interference state; When the interfered main antenna is in a weak interference state, adjusting the resonant frequency of the interfered main antenna; When the interfered main antenna is in a strong interference state, the interfered main antenna is switched with the secondary antenna of the corresponding frequency band, so that the secondary antenna of the corresponding frequency band serves as a new main antenna for transmitting and receiving signals of the corresponding frequency band.

2. The control method for reducing terminal device antenna interference according to claim 1, characterized in that: When the interfered main antenna is in a weak interference state, a matching capacitor or inductor on the interfered main antenna path is selected through a first radio frequency switch to adjust the resonant frequency of the interfered main antenna; When the interfered main antenna is in a strong interference state, the interfered main antenna is switched with the secondary antenna of the corresponding frequency band through the second RF switch, so that the secondary antenna of the corresponding frequency band serves as a new main antenna to assist the communication module in sending and receiving signals of the corresponding frequency band.

3. The control method for reducing terminal device antenna interference according to claim 1, characterized in that: Also includes: After detecting that the interfered main antenna switches with the secondary antenna of the corresponding frequency band, the RF end conduction power of the secondary antenna of the corresponding frequency band is increased, and the increased RF end conduction power value of the secondary antenna of the corresponding frequency band is not higher than the preset maximum power value of the corresponding frequency band.

4. A control device for reducing antenna interference of a terminal device, applied to a terminal device, wherein the terminal device comprises a flip-up screen, a plurality of main antennas are arranged at the upper end of the screen, and a secondary antenna corresponding to the frequency band of each main antenna is arranged on the side of the screen, characterized in that: include: An interference detection module is used to obtain the flip angle information of the screen; and determine whether the angle of the screen after flipping is within a preset first interference angle interval; When the angle of the screen after flipping is within a preset first angle interval, it is determined that all main antennas of the terminal device are in a weak interference state; it is determined whether the angle of the screen after flipping is within a preset second interference angle interval; when the angle of the screen after flipping is within the preset second angle interval, it is determined that the main antenna at the designated position of the terminal device is in a strong interference state; The switching adjustment module is used to adjust the resonant frequency of the interfered main antenna when the interfered main antenna is in a weak interference state; when the interfered main antenna is in a strong interference state, switch the interfered main antenna with the secondary antenna of the corresponding frequency band so that the secondary antenna of the corresponding frequency band serves as a new main antenna for transmitting and receiving signals in the corresponding frequency band.

5. The control device for reducing terminal device antenna interference according to claim 4, characterized in that: The switching adjustment module specifically includes: A frequency adjustment unit, configured to select a matching capacitor or inductor on a path of the interfered main antenna through a first radio frequency switch to adjust the resonant frequency of the interfered main antenna when the interfered main antenna is in a weak interference state; The antenna switching unit is used to switch the interfered main antenna with the secondary antenna of the corresponding frequency band through the second RF switch when the interfered main antenna is in a strong interference state, so that the secondary antenna of the corresponding frequency band serves as a new main antenna to assist the communication module in sending and receiving signals of the corresponding frequency band.

6. The control device for reducing terminal device antenna interference according to claim 4, characterized in that: Also includes: The power increasing module is used to increase the RF end conduction power of the secondary antenna of the corresponding frequency band after detecting that the interfered main antenna switches with the secondary antenna of the corresponding frequency band, and the increased RF end conduction power value of the secondary antenna of the corresponding frequency band is not higher than the preset maximum power value of the corresponding frequency band.

7. A terminal device, characterized in that: include: A base, wherein a first column is provided on the base; A rotatable main screen is arranged on the first column; a plurality of main antennas are arranged above the main screen, and a plurality of sub-antennas of different frequency bands are arranged on both sides of the main screen; and each main antenna and the sub-antenna of the corresponding frequency band are connected to the communication module of the chip through a second radio frequency switch; The terminal device also integrates the control device for reducing terminal device antenna interference as described in any one of claims 4-6.

8. The terminal device according to claim 7, characterized in that: Also includes: a second column, the second column being arranged on the first column; And a secondary screen located on the second column.

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