Folding screen device

Abstract

The invention discloses folding screen equipment. The folding screen equipment comprises a first machine body, a second machine body and a reconstruction component, the first machine body comprises a first radiating body, a second radiating body and a first breaking joint, the second machine body comprises a third radiating body, a fourth radiating body and a second breaking joint, and under the condition that the folding screen equipment is in a folding state, the first radiating body is opposite to the third radiating body, and the second radiating body is opposite to the fourth radiating body; at least one of the first radiator and the second radiator is electrically connected with the reconstruction assembly, and at least one of the third radiator and the fourth radiator is electrically connected with the reconstruction assembly; the reconstruction assembly is used for reconstructing the electrical length of a radiation structure composed of the first radiation body and the second radiation body, and the reconstruction assembly is used for reconstructing the electrical length of a second radiation structure composed of the third radiation body and the fourth radiation body.

Description

Technical Field

[0001] This application relates to the technical field of electronic products, and specifically relates to a folding screen device. Background Art

[0002] With the development of modern communication technologies, the performance, functions, and forms of mobile terminals are constantly changing to meet the increasingly rich usage scenarios and requirements of users. Traditional mobile terminals mainly have a straight and flat structure, and most of the front area of the device is occupied by the screen. Usually, the antenna mainly radiates through the frame and the back of the device. In contrast, as a new form of mobile terminal, the folding screen mobile phone brings a new usage experience to users, but also poses greater challenges to the design of antennas in the device.

[0003] Compared with traditional straight mobile phones, folding screen mobile phones have different usage scenarios such as unfolding, closing, and multi-angle hovering. It is necessary to more comprehensively consider the mutual influence between adjacent antennas and the coupling effect between different radiation branches. Moreover, due to the hinge structure between the main and secondary bodies, the available frame area for the antenna is less, and the radiation environment is more complex. Without reducing the number of communication frequency bands supported by the mobile terminal, how to design a compact and high-performance antenna in a more cramped space has become the key research direction in the industry and the design difficulty of the antenna for folding screen mobile terminals. It can be seen that in the related art, there is a problem of insufficient antenna installation space in folding screen mobile terminals. Summary of the Invention

[0004] This application provides a folding screen device, which can solve and alleviate the problem of insufficient antenna installation space in the folding screen device.

[0005] In a first aspect, this application provides a folding screen device, including: a first body, a second body, and a reconstruction component, wherein the first body is rotatably connected to the second body;

[0006] The first body includes a first radiator and a second radiator, and there is a first slit between the first radiator and the second radiator. The second body includes a third radiator and a fourth radiator, and there is a second slit between the third radiator and the fourth radiator. One end of the first radiator away from the second radiator is grounded, one end of the second radiator away from the first radiator is grounded, one end of the third radiator away from the fourth radiator is grounded, and one end of the fourth radiator away from the third radiator is grounded. Wherein, when the folding screen device is in the folded state, the first radiator and the third radiator are opposite to each other, and the second radiator and the fourth radiator are opposite to each other;

[0007] At least one of the first radiator and the second radiator is electrically connected to the reconstruction component; and at least one of the third radiator and the fourth radiator is electrically connected to the reconstruction component; the reconstruction component is configured to reconstruct the electrical length of the first radiation structure formed by the first radiator and the second radiator, and the reconstruction component is configured to reconstruct the electrical length of the second radiation structure formed by the third radiator and the fourth radiator;

[0008] The reconstruction component has at least two operating states. Among the at least two operating states, the electrical lengths of the first radiation structure corresponding to different operating states are different, and the electrical lengths of the second radiation structure corresponding to different operating states are different, so as to adapt to different operating frequency bands.

[0009] In the embodiments of the present application, by electrically connecting at least one of the first radiator and the second radiator to the reconstruction component, and at the same time, electrically connecting at least one of the third radiator and the fourth radiator to the reconstruction component. Since the reconstruction component can reconstruct the electrical length of the first radiation structure formed by the first radiator and the second radiator, and the reconstruction component can reconstruct the electrical length of the second radiation structure formed by the third radiator and the fourth radiator. The reconstruction component has at least two operating states. Among the at least two operating states, the electrical lengths of the first radiation structure corresponding to different operating states are different, and the electrical lengths of the second radiation structure corresponding to different operating states are different. In this way, the electrical lengths of the first radiation structure formed by the first radiator and the second radiator and the second radiation structure can be changed by the reconstruction component, and the electrical length of the second radiation structure can be changed, so that the first radiation structure and the second radiation structure can be used as radiators for different operating frequency bands, that is, two or more operating frequency bands can be integrated in the first radiation structure and the second radiation structure, thereby reducing the number of antennas in the folding screen device, which is beneficial to alleviating the problem of insufficient antenna installation space in the folding screen device and improving the utilization rate of the antenna space in the folding screen device. Description of the Drawings

[0010] Figure 1 is a basic structure comparison of the folding screen device with respect to a traditional straight mobile phone;

[0011] Figure 2 is a schematic structural diagram of the folding screen device provided in the embodiments of the present application when in a folded state;

[0012] Figure 3 is a schematic diagram of an antenna solution of a folding screen device provided in Embodiment 1 of the present application;

[0013] Figure 4It is a schematic diagram of the current directions in each radiator in one of the states during the working process of the radiation structure when the folding-screen electronic device provided by the embodiment of the present application is in a folded state;

[0014] Figure 5 is Figure 3 One of the schematic diagrams of the working states of the illustrated embodiment;

[0015] Figure 6 is Figure 3 Another schematic diagram of the working states of the illustrated embodiment;

[0016] Figure 7 It is a schematic diagram of the antenna scheme of a folding-screen device provided by the second embodiment of the present application;

[0017] Figure 8 is Figure 7 One of the schematic diagrams of the working states of the illustrated embodiment;

[0018] Figure 9 is Figure 7 Another schematic diagram of the working states of the illustrated embodiment;

[0019] Figure 10 is Figure 7 The third schematic diagram of the working states of the illustrated embodiment;

[0020] Figure 11 It is a schematic diagram of the antenna scheme of a folding-screen device provided by the third embodiment of the present application;

[0021] Figure 12 is Figure 11 One of the schematic diagrams of the working states of the illustrated embodiment;

[0022] Figure 13 is Figure 11 Another schematic diagram of the working states of the illustrated embodiment. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0024] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of this application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are usually of the same category, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0025] The following will combine the drawings and through specific embodiments and their application scenarios, a folding screen device provided by the embodiments of this application will be described in detail.

[0026] Please refer to Figures 1 to 13 , the embodiments of this application provide a folding screen device, including: a first body 100, a second body 200, and a reconstruction component 700. The first body 100 is rotatably connected to the second body 200 to switch between an unfolded state and a folded state;

[0027] The frame of the first body 100 includes a first radiator 111 and a second radiator 112. There is a first slit 113 between the first radiator 111 and the second radiator 112. The frame of the second body 200 includes a third radiator 211 and a fourth radiator 212. There is a second slit 213 between the third radiator 211 and the fourth radiator 212. One end of the first radiator 111 away from the second radiator 112 is grounded, one end of the second radiator 112 away from the first radiator 111 is grounded, one end of the third radiator 211 away from the fourth radiator 212 is grounded, and one end of the fourth radiator 212 away from the third radiator 211 is grounded. Wherein, when the folding screen device is in the folded state, the first radiator 111 and the third radiator 211 are opposite, and the second radiator 112 and the fourth radiator 212 are opposite;

[0028] At least one of the first radiator 111 and the second radiator 112 is electrically connected to the reconstruction component 700; and at least one of the third radiator 211 and the fourth radiator 212 is electrically connected to the reconstruction component 700; the reconstruction component 700 is used to reconstruct the electrical length of the first radiation structure 600 composed of the first radiator 111 and the second radiator 112, and the reconstruction component 700 is used to reconstruct the electrical length of the second radiation structure 800 composed of the third radiator 211 and the fourth radiator 212;

[0029] The reconstruction component 700 has at least two operating states. In the at least two operating states, the electrical lengths of the first radiation structure 600 corresponding to different operating states are different, and the electrical lengths of the second radiation structure 800 corresponding to different operating states are different.

[0030] The above folding screen device can be various types of folding screen electronic devices. For example, it can be various types of folding screen mobile terminals such as folding screen mobile phones.

[0031] It can be understood that the first body 100 and the second body 200 are respectively the bodies of the two display screens of the folding screen device. Among them, the first body 100 is the body of the main screen, and the second body 200 is the body of the secondary screen. Among them, the first body 100 and the second body 200 can be connected by various types of hinge structures 300 to realize the rotational connection between the first body 100 and the second body 200.

[0032] It should be noted that the folding screen device further includes a flexible screen, and the flexible screen covers both the first body 100 and the second body 200 at the same time. In this way, during the relative rotation of the first body 100 and the second body 200, the flexible screen can be driven to fold, unfold or hover.

[0033] It can be understood that the first radiator 111 and the second radiator 112 can be located on any one of the frames of the first body 100, or on any two adjacent frames of the first body 100. For example, please refer to Figure 3 , in some embodiments of the present invention, the first radiator 111 and the second radiator 112 are located on the first side frame 110 of the first body 100. In addition, in other embodiments of the present application, the first radiator 111 and the second radiator 112 can also be located on the first top frame 120 or the first bottom frame 130 of the first body 100. Or, among the first radiator 111 and the second radiator 112, one is located on the first top frame 120 and the other is located on the first side frame 110, etc.

[0034] It can be understood that, when the folding screen device is in the folded state, the first radiator 111 and the third radiator 211 face each other, and the second radiator 112 and the fourth radiator 212 face each other. Therefore, the setting position of the third radiator 211 corresponds to that of the first radiator 111. When the first radiator 111 is located on the first side frame 110, the third radiator 211 can be located on the second side frame 210; when the first radiator 111 is located on the first top frame 120, the third radiator 211 can be located on the second top frame 220; when the first radiator 111 is located on the first bottom frame 130, the third radiator 211 can be located on the second bottom frame 230. At the same time, the setting position of the fourth radiator 212 corresponds to that of the second radiator 112. When the second radiator 112 is located on the first side frame 110, the fourth radiator 212 can be located on the second side frame 210; when the second radiator 112 is located on the first top frame 120, the fourth radiator 212 can be located on the second top frame 220; when the second radiator 112 is located on the first bottom frame 130, the fourth radiator 212 can be located on the second bottom frame 230.

[0035] The frames of the first body 100 and the second body 200 described above can be conductive frames. For example, they can be frames made of metal materials.

[0036] Please refer to Figure 3 , the above folding screen device further includes a floor 400, and the floor 400 can be used as the main ground of the folding screen device. Among them, the frames of the folding screen device are arranged around the floor 400. The first radiator 111, the second radiator 112, the third radiator 211, and the fourth radiator 212 can be respectively arranged at intervals from the floor 400, and one end of the first radiator 111 far from the second radiator 112 can be electrically connected to the floor 400 through a connecting material to realize the grounding of one end of the first radiator 111 far from the second radiator 112. Correspondingly, one end of the second radiator 112 far from the first radiator 111 can be electrically connected to the floor 400 through a connecting material to realize the grounding of one end of the second radiator 112 far from the first radiator 111. One end of the third radiator 211 far from the fourth radiator 212 can be electrically connected to the floor 400 through a connecting material to realize the grounding of one end of the third radiator 211 far from the fourth radiator 212. One end of the fourth radiator 212 far from the third radiator 211 can be electrically connected to the floor 400 through a connecting material to realize the grounding of one end of the fourth radiator 212 far from the third radiator 211.

[0037] The above-mentioned reconstruction component 700 may include a switching element. A ground point can be set at a specific position in the first radiator 111 and the second radiator 112, and the ground point can be grounded through the switching element. In this way, by changing the conduction state of the switching element, it is possible to control whether the corresponding ground point is grounded. For example, please refer to Figure 8 , when the first radiator 111 includes a first ground point 115 and the first ground point 115 is not grounded, the electrical length in the first radiator 111 is the entire first radiator 111. Correspondingly, when the first ground point 115 is grounded, the electrical length in the first radiator 111 is the segment between the first ground point 115 and the first slot 113.

[0038] Correspondingly, a ground point can be set at a specific position in the third radiator 211 and the fourth radiator 212, and the ground point can be grounded through the switching element. In this way, by changing the conduction state of the switching element, it is possible to control whether the corresponding ground point is grounded.

[0039] In addition, when the folding screen device is in the folded state, the first slot 113 can be aligned with the second slot 213, so as to meet the appearance design requirements of the folding screen device.

[0040] The above-mentioned first radiation structure 600 may be a first radiation structure 600 formed by combining an excitation branch and a parasitic branch. Among the first radiator 111 and the second radiator 112, one serves as the excitation branch of the first radiation structure 600, and the other serves as the parasitic branch of the first radiation structure 600. It can be understood that since the reconstruction component 700 has more than two working states, the roles of the first radiator 111 and the second radiator 112 in the first radiation structure 600 may not be fixed. For example, in some working states, the first radiator 111 can serve as the excitation branch, and the second radiator 112 can serve as the parasitic branch; in other working states, the first radiator 111 can serve as the parasitic branch, and the second radiator 112 can serve as the excitation branch.

[0041] In this embodiment, at least one of the first radiator 111 and the second radiator 112 is electrically connected to the reconstruction component 700, and at the same time, at least one of the third radiator 211 and the fourth radiator 212 is electrically connected to the reconstruction component 700. Since the reconstruction component 700 can reconstruct the electrical length of the first radiation structure 600 composed of the first radiator 111 and the second radiator 112, and the reconstruction component 700 can reconstruct the electrical length of the second radiation structure 800 composed of the third radiator 211 and the fourth radiator 212, the reconstruction component 700 has at least two operating states. In the at least two operating states, the electrical length of the first radiation structure 600 corresponding to different operating states is different, and the electrical length of the second radiation structure 800 corresponding to different operating states is different. In this way, the electrical length of the first radiation structure 600 composed of the first radiator 111 and the second radiator 112 and the electrical length of the second radiation structure 800 can be changed by the reconstruction component 700, and the electrical length of the second radiation structure 800 can be changed. Therefore, the first radiation structure 600 and the second radiation structure 800 can be used as radiators for different operating frequency bands, that is, two or more operating frequency bands can be integrated in the first radiation structure 600 and the second radiation structure 800, thereby reducing the number of antennas in the folding screen device, which is beneficial to alleviating the problem of insufficient antenna installation space in the folding screen device and improving the utilization rate of the antenna space in the folding screen device.

[0042] Optionally, the folding screen device includes a first radio frequency circuit 501, the first radio frequency circuit 501 is electrically connected to the first radiator 111, and the at least two operating states include a first operating state and a second operating state;

[0043] When the reconstruction component 700 is in the first operating state, the first radiator 111 accesses an antenna signal of a first frequency band from the first radio frequency circuit 501;

[0044] When the reconstruction component 700 is in the second operating state, the first radiator 111 accesses an antenna signal of a second frequency band from the first radio frequency circuit 501;

[0045] Wherein, the first operating state corresponds to a first frequency band, the second operating state corresponds to a second frequency band, and the first frequency band and the second frequency band are different frequency bands.

[0046] The above-mentioned first radio frequency circuit 501 serves as a signal source for the first frequency band and the second frequency band. Among them, the frequency ranges of the first frequency band and the second frequency band can be set according to actual needs. For example, the first frequency band may include an intermediate frequency band, and the second frequency band may include a high frequency band. The intermediate frequency band may include the following frequency bands: Band B3 (1.71 - 1.88 GHz), Band B1 (1.92 - 2.17 GHz), and Band B40 (2.30 - 2.40 GHz). The high frequency band may include the following frequency bands: Band B41 (2.496 - 2.69 GHz) and Band N78 (3.30 - 3.60 GHz).

[0047] When the reconstruction component 700 is in the first working state, the electrical length of the first radiation structure 600 can be matched with the dielectric wavelength corresponding to the first frequency band to achieve the radiation of the antenna signal in the first frequency band. Among them, the electrical length of the first radiation structure 600 being matched with the dielectric wavelength corresponding to the first frequency band may mean that the electrical length of the main radiation branch in the first radiation structure 600 is equal to 1 / 2 or 1 / 4 of the dielectric wavelength corresponding to a certain frequency point in the first frequency band, so as to achieve the half-mode or quarter-mode of the main radiation branch in the first frequency band, thereby improving the radiation effect of the signal in the first frequency band.

[0048] When the reconstruction component 700 is in the second working state, the electrical length of the first radiation structure 600 can be matched with the dielectric wavelength corresponding to the second frequency band to achieve the radiation of the antenna signal in the second frequency band. Among them, the electrical length of the first radiation structure 600 being matched with the dielectric wavelength corresponding to the second frequency band may mean that the electrical length of the main radiation branch in the first radiation structure 600 is equal to 1 / 2 or 1 / 4 of the dielectric wavelength corresponding to a certain frequency point in the first frequency band, so as to achieve the half-mode or quarter-mode of the main radiation branch in the second frequency band, thereby improving the radiation effect of the signal in the second frequency band.

[0049] In this embodiment, when the reconstruction component 700 is in the first working state, the antenna signal in the first frequency band is fed into the first radiator 111 through the first radio frequency circuit 501. When the reconstruction component 700 is in the second working state, the antenna signal in the second frequency band is fed into the first radiator 111 through the first radio frequency circuit 501. In this way, it is possible to integrate the first frequency band and the second frequency band in the first radiation structure 600, thereby reducing the number of antennas in the folding screen device, facilitating the alleviation of the problem of insufficient antenna installation space in the folding screen device, and improving the utilization rate of the antenna space in the folding screen device.

[0050] Optionally, the first radiator 111 includes a first return point 115, a first feeding point 114, and a second feeding point 116. The first return point 115 is located between the first feeding point 114 and the second feeding point 116, and the second feeding point 116 is located between the first return point 115 and the first slot 113. The reconstruction component 700 includes a first switch 502. The first feeding point 114 and the second feeding point 116 are respectively electrically connected to the first radio frequency circuit 501, and the first return point 115 is grounded through the first switch 502;

[0051] When the reconstruction component 700 is in the first working state, the first switch 502 is in an open state, and the first radiator 111 accesses the antenna signal of the first frequency band from the first radio frequency circuit 501 through the first feeding point 114;

[0052] When the reconstruction component 700 is in the second working state, the first switch 502 is in a conducting state, and the first radiator 111 accesses the antenna signal of the second frequency band from the first radio frequency circuit 501 through the second feeding point 116. The maximum frequency value in the first frequency band is less than the minimum frequency value in the second frequency band.

[0053] Wherein, when the reconstruction component 700 is in the first working state, the second feeding point 116 does not access the antenna signal from the first radio frequency circuit 501 through the second feeder 504, that is, the first radio frequency circuit 501 does not feed the antenna signal to the second feeding point 116 through the second feeder 504. At this time, there is no signal transmission in the second feeder 504, and it can be considered that the second feeding point 116 is in a non-working state. Correspondingly, when the reconstruction component 700 is in the second working state, the first feeding point 114 does not access the antenna signal from the first radio frequency circuit 501 through the first feeder 503, that is, the first radio frequency circuit 501 does not feed the antenna signal to the first feeding point 114 through the first feeder 503. At this time, there is no signal transmission in the first feeder 503, and it can be considered that the first feeding point 114 is in a non-working state.

[0054] The above-mentioned first return point 115, first feeding point 114, and second feeding point 116 can be respectively located between the two ends of the first radiator 111, that is, the first return point 115, first feeding point 114, and second feeding point 116 are not located at the ends of the first radiator 111.

[0055] The above-mentioned first switch 502 can be various types of switches. When the first switch 502 is in the off state, the first return ground point 115 is disconnected from the floor 400. At this time, the first return ground point 115 is in a non-grounded state. When the first switch 502 is in the on state, the first return ground point 115 is connected to the floor 400. At this time, the first return ground point 115 is in a grounded state.

[0056] Among them, the first frequency band may include the intermediate frequency band, and the second frequency band may include the high frequency band. Since the frequency range of the first frequency band is lower than that of the second frequency band, and the higher the frequency, the shorter the corresponding wavelength. Correspondingly, during the radiation process, the electrical length of the radiator required is also shorter. That is, the electrical length of the radiator required for the first frequency band needs to be greater than the electrical length of the radiator required for the second frequency band.

[0057] In this embodiment, when the first radiator 111 operates in the first frequency band, the first switch 502 is controlled to be off. At this time, the electrical length of the first radiator 111 is the length of the first radiator 111. When the first radiator 111 operates in the second frequency band, the first switch 502 is controlled to be on. At this time, the electrical length of the first radiator 111 is the segment between the first return ground point 115 and the first slot 113. In this way, the first radiator 111 can have good radiation effects in both the first frequency band and the second frequency band.

[0058] Optionally, the folding screen device further includes a second switch 506, a third switch 507, a fourth switch 509, a first tuning circuit 505, and a second tuning circuit 508. The second radiator 112 includes a second return ground point 117, the third radiator 211 includes a third return ground point 214, and the fourth radiator 212 includes a fourth return ground point 215. The second return ground point 117 is grounded through the second switch 506, the third return ground point 214 is grounded through the third switch 507, and the fourth return ground point 215 is grounded through the fourth switch 509. The first tuning circuit 505 is disposed across the first slot 113, and the first radiator 111 is electrically connected to the second radiator 112 through the first tuning circuit 505. The second tuning circuit 508 is disposed across the second slot 213, and the third radiator 211 is electrically connected to the fourth radiator 212 through the second tuning circuit 508;

[0059] When the reconstruction component 700 is in the first working state, the second switch 506, the third switch 507, and the fourth switch 509 are respectively in the off state;

[0060] When the reconstruction component 700 is in the first working state, the second switching element 506, the third switching element 507, and the fourth switching element 509 are respectively in the conducting state.

[0061] Among them, the second return point 117 is the position point between both ends of the second radiator 112, that is, the second return point 117 is not located at the end of the second radiator 112. Correspondingly, the third return point 214 is the position point between both ends of the third radiator 211, that is, the third return point 214 is not located at the end of the third radiator 211. The fourth return point 215 is the position point between both ends of the fourth radiator 212, that is, the fourth return point 215 is not located at the end of the fourth radiator 212.

[0062] The above-mentioned first tuning circuit 505 being disposed across the first slit 113 may mean that: among the input end and the output end of the first tuning circuit 505, one is electrically connected to the end of the first radiator 111 facing the first slit 113, and the other is electrically connected to the end of the second radiator 112 facing the first slit 113. That is, the first tuning circuit 505 is disposed across the first slit 113.

[0063] Correspondingly, the second tuning circuit 508 being disposed across the second slit 213 may mean that: among the input end and the output end of the second tuning circuit 508, one is electrically connected to the end of the third radiator 211 facing the second slit 213, and the other is electrically connected to the end of the fourth radiator 212 facing the second slit 213. That is, the second tuning circuit 508 is disposed across the second slit 213.

[0064] The above-mentioned second switching element 506 can be various types of switching elements. When the second switching element 506 is in the off state, the second return point 117 is disconnected from the floor 400. At this time, the second return point 117 is in a non-grounded state. When the second switching element 506 is in the on state, the second return point 117 is connected to the floor 400. At this time, the second return point 117 is in a grounded state.

[0065] The above-mentioned third switching element 507 can be various types of switching elements. When the third switching element 507 is in the off state, the third return point 214 is disconnected from the floor 400. At this time, the third return point 214 is in a non-grounded state. When the third switching element 507 is in the on state, the third return point 214 is connected to the floor 400. At this time, the third return point 214 is in a grounded state.

[0066] The above-mentioned fourth switch 509 can be various types of switches. When the fourth switch 509 is in the off state, the fourth return point 215 is disconnected from the floor 400. At this time, the fourth return point 215 is in a non-grounded state. When the fourth switch 509 is in the on state, the fourth return point 215 is connected to the floor 400. At this time, the fourth return point 215 is in a grounded state.

[0067] The above-mentioned first tuning circuit 505 can be a tuning circuit composed of various devices such as capacitors, resistors, and inductors. And the first tuning circuit 505 can have multiple states. Specifically, the switch inside the tuning circuit can control the first tuning circuit 505 to switch between multiple states. Specifically, the switching device of the first tuning circuit 505 can control the conduction of the corresponding lumped element to adjust the operating frequency of the antenna. According to the electrical length of the antenna radiator and the needs of the operating frequency, the bridging circuit can present different states such as short circuit, open circuit, capacitive, and inductive. No specific limitation is made here.

[0068] Correspondingly, the second tuning circuit 508 can be a tuning circuit composed of various devices such as capacitors, resistors, and inductors. And the second tuning circuit 508 can have multiple states. Specifically, the switch inside the tuning circuit can control the second tuning circuit 508 to switch between multiple states. Specifically, the switching device of the second tuning circuit 508 can control the conduction of the corresponding lumped element to adjust the operating frequency of the antenna. According to the electrical length of the antenna radiator and the needs of the operating frequency, the bridging circuit can present different states such as short circuit, open circuit, capacitive, and inductive. No specific limitation is made here.

[0069] For the convenience of understanding, the structural principle of the Figure 3 illustrated embodiment is further explained below:

[0070] The basic structure of the folding screen device included in this application relative to a traditional straight mobile phone is as Figure 1 shown, where Figure 1 (a) is a traditional straight mobile phone, Figure 1(b) is a folding screen device. For traditional straight-bar mobile phones, the front of the device is usually completely occupied by the screen, and the main antenna types are mainly metal frame antennas and flexible printed circuit (FPC) antennas placed under the non-metal back cover. In contrast, the structure of a folding screen device is more complex. The main body and the secondary body are connected by a hinge, enabling various usage scenarios such as device unfolding, closing, and multi-angle hovering. The outer screen is similar to that of a traditional straight-bar mobile phone and is placed on the front of the secondary body of the device. The inner screen is a flexible display screen, and its bending area is located inside the hinge. The main antenna types are mainly metal frame antennas and FPC antennas placed under the non-metal back cover. Although when the folding screen device is in the unfolded state, it presents four side frames similar to those of a traditional straight-bar mobile phone, due to the screens being placed on both the front and back of the secondary body, the main board and radio frequency circuits usually need to be placed under the inner screen of the main body. The antenna feeding for the secondary body needs to route through the main body and pass through the hinge structure 300 in the middle of the device, resulting in large losses and being difficult to implement. Therefore, a common solution is to use the side frame of the secondary body as a parasitic radiation stub of the side frame antenna of the main body. In addition, when the folding screen device is in the folded state, due to the need for the appearance design, the gap positions between the main body and the secondary body need to be aligned, further restricting the antenna layout and performance improvement of the folding screen device.

[0071] As an example of the use of the antenna solution included in the present application, the metal frame antenna located on the side can be constructed according to the basic structure as Figure 2 shown. Through the reconstruction and reuse of multiple radiators, multiple antennas with different operating frequency bands can be constructed in the side area of the folding screen device, thereby meeting the increasingly complex communication requirements of mobile terminals.

[0072] The antenna solution included in the present application can include multiple antenna radiators. The first radiator 111 and the second radiator 112 are located at the side frame of the main body, with a first gap in the middle. The third radiator 211 and the fourth radiator 212 are located at the side frame of the secondary body, with a second gap between them. The lengths of the respective radiators can be the same or different, depending on the specific antenna design requirements. The distances of the first gap and the second gap from the upper frame of the device are the same, so that the two gaps can be aligned when the folding screen device is in the folded state, meeting the appearance design requirements of the mobile terminal.

[0073] As an example of the use of the antenna solution included in the present application, the structure of the metal frame antenna located on the side is as Figure 3As shown in the figure. Among them, the first radiator 111 is the excited radiation branch of the antenna, which obtains energy from the RF circuit through the transmission line and radiates it. The remaining radiators are coupled radiation branches, which obtain energy from the first radiator 111 through coupling and radiate it. The first radiator 111 is provided with a first feeding point 114 and a second feeding point 116, which are connected to the first RF circuit 501 through the first feeder 503 and correspond to RF signals in different operating frequency bands. A first grounding point 115 is arranged between the first feeding point 114 and the second feeding point 116 and is grounded through the first switching element 502. By controlling the on / off of the first switching element 502, the electrical length of the first radiator 111 can be changed. The first switching element 502 here is not specifically limited and can be a single device such as a switch, inductor, capacitor, resistor, or a circuit composed of multiple devices.

[0074] The second radiator 112 is used as a parasitic radiation branch of the first radiator 111. A first tuning circuit 505 is connected across the two ends of the first slit. The conduction of the corresponding lumped elements can be controlled by using switching devices, thereby adjusting the operating frequency of the antenna. According to the requirements of the electrical length of the radiator and the operating frequency, the bridging circuit can present different states such as short circuit, open circuit, capacitive, and inductive. No specific limitation is made here, but it should be noted that better antenna performance can be obtained when the current distribution directions of the first radiator 111 and the second radiator 112 are the same. Compared with the traditional single-radiator scheme and the coupled parasitic radiator scheme, the bridging tuning circuit scheme can effectively improve the uniformity of the field distribution of the radiator and increase the radiation aperture of the antenna, thereby improving the efficiency of the antenna. The second radiator 112 is provided with a second grounding point 117 and is grounded through a switching device. By controlling the on / off of the switching device, the electrical length of the second radiator 112 can be changed. The switching device here is not specifically limited and can be a single device such as a switch, inductor, capacitor, resistor, or a circuit composed of multiple devices.

[0075] The third radiator 211 and the fourth radiator 212 located in the secondary body are respectively provided with a third return point 214 and a fourth return point 215 and are grounded through switching devices. By controlling the on / off of the switching devices, the electrical length of the corresponding radiator can be changed. The switching devices here are not specifically limited and can be individual devices such as switches, inductors, capacitors, resistors, or circuits composed of multiple devices. In addition, the tuning circuit is placed across both ends of the second slot, and the conduction of the corresponding lumped elements is controlled by the switching devices, thereby adjusting the operating frequency of the antenna. According to the requirements of the radiator electrical length and operating frequency, the bridging circuit can present different states such as short circuit, open circuit, capacitive, and inductive, which are not specifically limited here. When the folding screen device is in the unfolded state, the third radiator 211 and the fourth radiator 212 located in the secondary body are far from the first radiator 111 and the second radiator 112 located in the main body, and effective coupling excitation cannot be obtained from the main body. When the folding screen device is in the folded state as shown in Figure 3 , the main body and the secondary body are very close (less than 1 mm), and at this time, there will be a strong coupling effect between each radiator. By adjusting the state of the tuning circuit, when each radiator presents a co-directional current distribution as shown in Figure 4 or the proportion of co-directional current is relatively high, better antenna performance can be obtained.

[0076] As an example of the use of the antenna solution included in this application, for the structure of the metal frame antenna as shown in Figure 3 , through the reconstruction and reuse of the radiator, it can be used to implement the intermediate frequency antenna and the high frequency antenna. Among them, the intermediate frequency antenna operates in the B3 band (1.71 - 1.88 GHz), the B1 band (1.92 - 2.17 GHz), and the B40 band (2.30 - 2.40 GHz), and the high frequency antenna operates in the B41 band (2.496 - 2.69 GHz) and the N78 band (3.30 - 3.60 GHz). The first radio frequency circuit 501 can be understood as a radio frequency signal source in the intermediate frequency band and the high frequency band, and its internal structure and device form are not specifically limited here. Taking the IFA (Inverted-F Antenna) antenna commonly used in mobile terminals as an example, the length of the metal frame antenna is about 0.25λ, where λ is the wavelength of the electromagnetic wave in the medium corresponding to the operating frequency. Therefore, compared with the high frequency antenna, the radiator length of the intermediate frequency antenna is larger.

[0077] For further understanding, the structural principle in the case where the reconstruction component 700 is in the first working state in the embodiment shown in Figure 3 is explained below, where the first frequency band is the intermediate frequency band and the second frequency band is the high frequency band:

[0078] As an example of the use of the antenna solution included in this application, the basic structure of the intermediate frequency antenna is realized by reconstructing and reusing the radiator. Figure 5 As shown. The first loop point 115, the second loop point 117, the third loop point 214, and the fourth loop point 215 are all in an open circuit state, thereby maximizing the electrical length of each radiator, wherein the first loop point 115, the second loop point 117, the third loop point 214, and the fourth loop point 215 are all in an open circuit state, which means that the switch elements corresponding to the first loop point 115, the second loop point 117, the third loop point 214, and the fourth loop point 215 are all in an open state, that is, the first switch element 502, the second switch element 506, the third switch element 507, and the fourth switch element 509 are all in an open state. In addition, the first RF circuit 501 connects the intermediate frequency band RF signal to the first feeding point 114 of the first radiator 111 through the first feeder line 503, and the second feeding point 116 is in an open circuit state, forming an IFA metal frame antenna whose operating frequency can cover the intermediate frequency band. When the length of the first radiator 111 is L1, the distance between the first feeding point 114 and the end connection back to the ground should be controlled within the range of 0.2-0.5L1, and the intermediate frequency antenna can obtain a better initial impedance.

[0079] As the intermediate frequency antenna solution included in this application, the length (L1) of the first radiator 111 should be set at 0.15-0.35λ MB In the range of MB is the medium wavelength corresponding to the highest operating frequency (2.40 GHz) in the mid-frequency band. However, considering that the first radiator 111 and the second radiator 112 are connected by a cross-connected tuning circuit to adjust the working frequency of the antenna in the mid-frequency band, when the length (L1) of the first radiator 111 is 0.25λ MB During setting, the antenna operating frequency can be switched between the B3 / B1 / B40 bands by bridging the capacitive circuit or opening the circuit (since the width of the gap is 1.2mm, the coupling between the metal frames presents a weaker capacitive property when the bridging circuit is open). At this time, the field distribution uniformity of the first radiator 111 and the second radiator 112 is better, and the intermediate frequency antenna can obtain higher efficiency. The length (L2) of the second radiator 112 should be as consistent as possible with the length (L1) of the first radiator 111, and can be adjusted within the range of 0.7-1.3L1 according to actual needs. In addition, the length (L3) of the third radiator 211 and the length (L1) of the first radiator 111 should be as consistent as possible, and the length (L4) of the fourth radiator 212 and the length (L2) of the second radiator 112 should be as consistent as possible, so that the coupling effect between the main and secondary bodies of the folding screen device can be fully utilized when the folding screen device is in the folded state. Figure 4As shown in the figure, currents with the same direction as those in the first radiator 111 and the second radiator 112 are excited in the third radiator 211 and the fourth radiator 212, thereby obtaining better antenna performance.

[0080] For further ease of understanding, the structural principle of the reconstruction component 700 in the second working state in the embodiments shown below will be explained: Figure 3 In the embodiments shown, when the reconstruction component 700 is in the second working state, the structural principle is explained as follows:

[0081] As an example of the use of the antenna solution included in the present application, the basic structure of the high-frequency antenna is realized through the reconstruction and reuse of the radiators as shown in Figure 6 the figure. Among them, the first ground point 115, the second ground point 117, the third ground point 214, and the fourth ground point 215 are all in a short-circuit state. By adjusting the positions of the ground points of each radiator, the electrical length of the radiator can be reduced, enabling it to operate in a higher frequency band. Among them, the fact that the first ground point 115, the second ground point 117, the third ground point 214, and the fourth ground point 215 are all in an open-circuit state means that the switching elements corresponding to the first ground point 115, the second ground point 117, the third ground point 214, and the fourth ground point 215 are all in a conducting state, that is, the first switching element 502, the second switching element 506, the third switching element 507, and the fourth switching element 509 are all in a conducting state. It should be noted that in the embodiments of the present application, the ground point is in an open-circuit state, that is, the switching element connected to the ground point is in an off state; the ground point is in a short-circuit state, that is, the switching element connected to the ground point is in a conducting state. At the same time, the first radio frequency circuit 501 is adjusted accordingly. The high-frequency radio frequency signal is connected to the second feeding point 116 of the first radiator 111 through the second feeder 504, and the first feeding point 114 is in an open-circuit state, constituting an IFA metal frame antenna whose operating frequency can cover the high-frequency band. When the length of the first ground point 115 from the first slot is L 12 , the length of the second feeding point 116 from the first ground point 115 should be controlled within the range of 0.2 - 0.5L 12 so that the high-frequency antenna can obtain better initial impedance.

[0082] As the high-frequency antenna solution included in the present application, the length (L 12 ) of the first ground point 115 from the first slot should be set within the range of 0.15 - 0.35λ HB , where λ HB is the dielectric wavelength corresponding to the highest operating frequency (3.60 GHz) in the high-frequency band. However, considering the use of a bridging tuning circuit to adjust the operating frequency of the antenna within the high-frequency band, when the length (L 12 ) of the first ground point 115 from the first slot is 0.22λ HBWhen setting, the switching of the antenna operating frequency in the B41 / N78 frequency band can be achieved by bridging a capacitive circuit or opening the circuit (since the width of the slot is 1.2 mm, the coupling between the metal frames shows a weak capacitance when the bridging circuit is open). At this time, the field distribution uniformity of the radiators at both ends of the slot is better, and the high-frequency antenna can obtain higher efficiency. The length (L 22 ) of the second return point 117 from the first slot should be as consistent as possible with that (L 12 ) of the first return point 115, and it can be adjusted within the range of 0.7 - 1.3L 12 according to actual needs. In addition, the length (L 32 ) of the third return point 214 from the second slot and that (L 12 ) of the first return point 115 should be as consistent as possible, and the length (L 42 ) of the fourth return point 215 from the second slot and that (L 22 ) of the second return point 117 should be as consistent as possible. In this way, the coupling effect between the main and secondary bodies of the folding screen device when it is in the folded state can be fully utilized. As shown in Figure 4 , currents with the same direction as those of the first radiator 111 and the second radiator 112 are excited in the third radiator 211 and the fourth radiator 212, and thus better antenna performance can be obtained.

[0083] As an example of the use of the antenna scheme of the folding screen device included in this application, the metal frame antenna on the side is in the basic structure as shown in Figure 3 . Through the reconstruction and reuse of multiple radiators, an intermediate-frequency antenna as shown in Figure 5 and a high-frequency antenna as shown in Figure 6 can be constructed. The average total efficiency of the antenna is shown in Table 1.

[0084] Table 1

[0085]

[0086] As an example of the use of the antenna scheme of the folding screen device included in this application, since both the intermediate-frequency antenna and the high-frequency antenna use the method of bridging a tuning circuit (capacitive) to adjust the operating frequency of the antenna within the corresponding frequency band, and the length of the radiator is designed according to the upper limit of the operating frequency, the performance of the intermediate-frequency antenna in the B40 frequency band is slightly better than that in the B1 and B3 frequency bands, and the performance of the high-frequency antenna in the N78 frequency band is slightly better than that in the B41 frequency band.

[0087] In this embodiment, by reconstructing and reusing the radiator, the space on the side frame of the folding screen device is effectively utilized. Not only are high-performance intermediate-frequency antennas and high-frequency antennas constructed, but also the positions of the slits on the main body and the secondary body are aligned, meeting the extreme appearance design requirements of the mobile terminal. At the same time, by bridging a tuning circuit at the slit, the radiation aperture of the intermediate-frequency antenna and the high-frequency antenna is effectively increased, and the field distribution uniformity of the radiator is improved. In addition, by utilizing the coupling effect between adjacent radiators on the main and secondary bodies when the folding screen device is in the folded state to form a co-directional current, the efficiency of the antenna when the device is in the folded state is effectively improved.

[0088] Optionally, the lengths of the first radiator 111, the second radiator 112, the third radiator 211, and the fourth radiator 212 are equal.

[0089] In this embodiment, by making the lengths of the first radiator 111, the second radiator 112, the third radiator 211, and the fourth radiator 212 equal, the coupling effect between the main and secondary bodies when the folding screen device is in the folded state can be fully utilized. As Figure 4 shown, a current distribution in the same direction as the first radiator 111 and the second radiator 112 is excited in the third radiator 211 and the fourth radiator 212, thereby obtaining better antenna performance.

[0090] Optionally, the length of the first radiator 111 is 0.15 - 0.35 times the first wavelength, and the first wavelength is the dielectric wavelength corresponding to the highest frequency point in the first frequency band;

[0091] The distance from the first ground point 115 to the first slit 113 is 0.15 - 0.35 times the second wavelength, and the second wavelength is the dielectric wavelength corresponding to the highest frequency point in the second frequency band.

[0092] In this embodiment, by making the length of the first radiator 111 be 0.15 - 0.35 times the first wavelength, where the first wavelength is the dielectric wavelength corresponding to the highest frequency point in the first frequency band; and the distance from the first ground point 115 to the first slit 113 be 0.15 - 0.35 times the second wavelength, where the second wavelength is the dielectric wavelength corresponding to the highest frequency point in the second frequency band, in this way, the length of the first radiator 111 can be adapted to the dielectric wavelength of the first frequency band, and the distance from the first ground point 115 to the first slit 113 can be adapted to the dielectric wavelength of the second frequency band, thus facilitating the improvement of the antenna radiation effect when the reconstruction component 700 is in the first working state and the second working state.

[0093] Optionally, the folding screen device further includes a second radio frequency circuit 511. The second radiator 112 includes a third feeding point 119. The second radio frequency circuit 511 is electrically connected to the third feeding point 119. The at least two operating states further include a third operating state.

[0094] When the reconstruction component 700 is in the third operating state, the second radiator 112 accesses an antenna signal in a third frequency band from the second radio frequency circuit 511 through the third feeding point 119. The third frequency band is a frequency band other than the first frequency band and the second frequency band.

[0095] Wherein, the frequency range of the third frequency band can be set as required. For example, in some embodiments of the present application, the third frequency band can be a low frequency band. Correspondingly, the first frequency band is a middle frequency band, and the second frequency band is a high frequency band.

[0096] In this embodiment, by enabling the reconstruction component 700 to further include a third operating state, three different frequency bands can be integrated in the first radiation structure 600 at the same time. Thus, the number of antennas in the folding screen device can be further reduced, which is beneficial to further alleviating the problem of insufficient antenna installation space in the folding screen device and improving the utilization rate of the antenna space of the folding screen device.

[0097] Optionally, the second radiator 112 further includes a fifth grounding point 118. The fifth grounding point 118 is located between the third feeding point 119 and the first slot 113. The reconstruction component 700 further includes a fifth switching element 512. The fifth grounding point 118 is grounded through the fifth switching element 512.

[0098] The maximum frequency value in the third frequency band is less than the minimum frequency value in the first frequency band, and the maximum frequency value in the third frequency band is less than the minimum frequency value in the second frequency band.

[0099] When the reconstruction component 700 is in the first operating state or the second operating state, the fifth switching element 512 is in a conducting state.

[0100] When the reconstruction component 700 is in the third operating state, the fifth switching element 512 is in an open state.

[0101] In this embodiment, since the frequency range of the third frequency band is the smallest among the first, second, and third frequency bands, during the operation of the first radiation structure 600 in the third frequency band, the required electrical length is the longest. Based on this, by further setting the fifth grounding point 118 and the fifth switching element 512, when the fifth switching element 512 is in the off state, the fifth grounding point 118 is in a non-grounded state. At this time, the effective electrical length of the second radiator 112 is the overall length of the second radiator 112. Therefore, at this time, it can serve as the radiator for the third frequency band. Correspondingly, when the first radiation structure 600 operates in the first and second frequency bands, the electrical length of the second radiator 112 needs to be adaptively reduced to match the corresponding operating frequency bands. Based on this, when the reconstruction component 700 is in the first operating state or the second operating state, by making the fifth switching element 512 in the on state, at this time, the electrical length of the second radiator 112 will not exceed the distance between the fifth grounding point 118 and the first slit 113, so that it can serve as the radiator for the first and second frequency bands.

[0102] Optionally, please refer to Figure 7 , the first radiator 111 further includes a first grounding point 115, the second radiator 112 includes a second grounding point 117, the third radiator 211 includes a third grounding point 214, the fourth radiator 212 includes a fourth grounding point 215 and a sixth grounding point 216, and the folding screen device further includes a first switching element 502, a second switching element 506, a third switching element 507, a fourth switching element 509, and a sixth switching element 510. The first grounding point 115 is grounded through the first switching element 502, the second grounding point 117 is grounded through the second switching element 506, the third grounding point 214 is grounded through the third switching element 507, the fourth grounding point 215 is grounded through the fourth switching element 509, the sixth grounding point 216 is grounded through the sixth switching element 510. The second grounding point 117 is located between the fifth grounding point 118 and the first slit 113, and the fourth grounding point 215 is located between the second slit 213 and the sixth grounding point 216;

[0103] When the reconstruction component 700 is in the first operating state, the first switching element 502, the second switching element 506, the third switching element 507, and the fourth switching element 509 are respectively in the off state, and the sixth switching element 510 is in the on state;

[0104] When the reconstruction component 700 is in the second operating state, the first switching element 502, the second switching element 506, the third switching element 507, the fourth switching element 509, and the sixth switching element 510 are respectively in the on state,

[0105] When the reconstruction component 700 is in the third working state, the first switch 502, the second switch 506, the third switch 507, the fourth switch 509 and the sixth switch 510 are respectively in the off state.

[0106] For the sake of easy understanding, the structural principle of the Figure 7 illustrated embodiment will be further explained as follows:

[0107] As an example of the use of the antenna solution included in the present application, the structure of the metal frame antenna located on the side is as Figure 7 shown. The first radiator 111 is provided with a first feeding point 114 and a second feeding point 116. The first feeding point 114 is electrically connected to the first radio frequency circuit 501 through the first feeder 503, and the second feeding point 116 is electrically connected to the first radio frequency circuit 501 through the second feeder 504. The first feeding point 114 and the second feeding point 116 are respectively used to receive radio frequency signals in the middle frequency band and the high frequency band. A first ground point 115 is arranged between the first feeding point 114 and the second feeding point 116 and is grounded through a first switching device. By controlling the on-off of the first switching device, the electrical length of the first radiator 111 can be changed. The switching device here is not specifically limited and can be a single device such as a switch, an inductor, a capacitor, a resistor, or a circuit composed of multiple devices. The second radiator 112 is provided with a third feeding point 119 and is connected to the second radio frequency circuit 511 through a feeder for radio frequency signals in the low frequency band. The second radiator 112 is provided with a second ground point 117 and a fifth ground point 118 and is grounded through a switching device. By controlling the on-off of the switching device, the electrical length of the second radiator 112 can be changed. The switching device here is not specifically limited and can be a single device such as a switch, an inductor, a capacitor, a resistor, or a circuit composed of multiple devices.

[0108] When the first radiator 111 serves as the excitation radiation branch of the middle frequency antenna and the high frequency antenna, it obtains energy from the first radio frequency circuit 501 through the transmission line and radiates. The remaining radiators can serve as the coupled radiation branches of the middle frequency antenna and the high frequency antenna and obtain energy from the first radiator 111 through coupling and radiate. When the second radiator 112 serves as the excitation radiation branch of the low frequency antenna, it obtains energy from the second radio frequency circuit 511 through the transmission line and radiates. The remaining radiators can serve as the coupled radiation branches of the low frequency antenna and obtain energy from the second radiator 112 through coupling and radiate.

[0109] The first radiator 111 and the second radiator 112 are both the excited radiation branches corresponding to their respective operating frequency bands and the parasitic radiation branches corresponding to their respective non-operating frequency bands. Therefore, the tuning circuit connected across the two ends of the first slit can be multiplexed, and the conduction of the corresponding lumped element is controlled by the switching device, thereby adjusting the operating frequency of the antenna. According to the requirements of the electrical length of the radiator and the operating frequency, the bridging circuit can present different states such as short circuit, open circuit, capacitive, inductive, etc., which are not specifically limited here. However, it should be noted that better antenna performance can only be obtained when the current distribution directions of the first radiator 111 and the second radiator 112 are the same.

[0110] The third radiator 211 located on the secondary fuselage is provided with a third ground return point 214, and the fourth radiator 212 is provided with a fourth ground return point 215 and a sixth ground return point 216. By controlling the on / off of the corresponding switching device, the electrical length of the corresponding radiator can be changed. The switching device here is not specifically limited and can be a single device such as a switch, inductor, capacitor, resistor, or a circuit composed of multiple devices. In addition, the tuning circuit is connected across the two ends of the second slit in a bridging manner, and the conduction of the corresponding lumped element is controlled by the switching device, thereby adjusting the operating frequency of the antenna. According to the requirements of the electrical length of the radiator and the operating frequency, the bridging circuit can present different states such as short circuit, open circuit, capacitive, inductive, etc., which are not specifically limited here.

[0111] As an example of the use of the antenna solution included in this application, such as Figure 7 the structure of the metal frame antenna shown. Through the reconstruction and multiplexing of the radiator, low-frequency antennas, intermediate-frequency antennas, and high-frequency antennas can be realized within the limited area of the side frame of the folding screen device. Among them, the low-frequency antenna operates in the B28 frequency band (0.703 - 0.803 GHz), B5 frequency band (0.824 - 0.894 GHz), and B8 frequency band (0.88 - 0.96 GHz), the intermediate-frequency antenna operates in the B3 frequency band (1.71 - 1.88 GHz), B1 frequency band (1.92 - 2.17 GHz), and B40 frequency band (2.30 - 2.40 GHz), and the high-frequency antenna operates in the B41 frequency band (2.496 - 2.69 GHz) and N78 frequency band (3.30 - 3.60 GHz). The first radio frequency circuit 501 can be understood as a radio frequency signal source for the intermediate-frequency band and high-frequency band, and the second radio frequency circuit 511 can be understood as a radio frequency signal source for the low-frequency band. Their internal structures and device forms are not specifically limited here.

[0112] For further ease of understanding, the structural principle of the reconstruction component 700 in the third working state in the embodiment shown below Figure 7 is explained, where the first frequency band is the intermediate-frequency band, the second frequency band is the high-frequency band, and the third frequency band is the low-frequency band:

[0113] As an example of the use of the antenna solution included in this application, the basic structure of the low-frequency antenna is realized through the reconstruction and reuse of the radiator as shown in Figure 8 Figure [not provided]. Among them, the first return point 115, the second return point 117, the third return point 214, the fourth return point 215, the fifth return point 118, and the sixth return point 216 are all in an open state, and the electrical length of each radiator is at its maximum value, thus meeting the large size requirements of the low-frequency antenna. At the same time, the second radio frequency circuit 511 connects the low-frequency band radio frequency signal to the third feeding point 119 of the second radiator 112 through the third feeder. The first feeding point 114 and the second feeding point 116 are both in an open state, forming an IFA metal frame antenna whose operating frequency can cover the low-frequency band. In order to obtain a better initial impedance of the antenna, the length of the third feeding point 119 from the end connecting material to the ground should be controlled within the range of 0.15 - 0.35L2, where L2 is the length of the second radiator 112.

[0114] As the low-frequency antenna solution included in this application, the length (L2) of the second radiator 112 should be set within the range of 0.25 - 0.35λ LB where λ LB is the dielectric wavelength corresponding to the highest operating frequency (0.96 GHz) in the low-frequency band. In the antenna solution as shown in Figure 7 Figure [not provided], the first radiator 111 not only serves as a parasitic radiation stub of the second radiator 112 in the low-frequency band but also as an excited radiation stub of the intermediate-frequency antenna and the high-frequency antenna. Therefore, the length (L1) of the first radiator 111 should be set within the range of 0.15 - 0.35λ MB where λ MB is the dielectric wavelength corresponding to the highest operating frequency (2.40 GHz) in the intermediate-frequency band. Considering that the operating frequency of the antenna is adjusted in the low-frequency band by using a bridging tuning circuit and the length of the parasitic radiation stub of the low-frequency antenna is less than that of the excited radiation stub (L1 < L2), when the length (L2) of the second radiator 112 is set to 0.3λ LBWhen setting, the switching of the antenna operating frequency in the B28 / B5 / B8 frequency bands can be achieved by bridging a capacitive circuit or opening the circuit (since the width of the slit is 1.2 mm, the coupling between the metal frames presents a weak capacitance when the bridging circuit is open). Compared with the traditional single radiator scheme, the bridging tuning circuit scheme can still improve the uniformity of the radiator field distribution when the size of the parasitic radiation branches is insufficient. Especially for low-frequency antennas, it can effectively increase the proportion of the longitudinal current of the floor 400, thereby improving the efficiency of the antenna. In addition, the length (L3) of the third radiator 211 and the length (L1) of the first radiator 111 should be kept as consistent as possible, and the length (L4) of the fourth radiator 212 and the length (L2) of the second radiator 112 should be kept as consistent as possible. In this way, the coupling effect between the main body and the secondary body of the folding screen device in the folded state can be fully utilized to excite the longitudinal current of the floor 400 with the same direction in the main and secondary bodies, thereby obtaining better low-frequency antenna performance.

[0115] For further ease of understanding, the structural principle of the reconstruction component 700 in the first working state in the following embodiments will be explained: Figure 7 In the illustrated embodiment, the structural principle of the reconstruction component 700 in the first working state is explained as follows:

[0116] As an example of the use of the antenna scheme included in the present application, the basic structure of the intermediate-frequency antenna is realized through the reconstruction and reuse of the radiator as shown in Figure 9 In the figure, the first ground return point 115, the second ground return point 117, the third ground return point 214, and the fourth ground return point 215 are in an open state, and the fifth ground return point 118 and the sixth ground return point 216 are in a short-circuit state. By adjusting the ground return point positions of the second radiator 112 and the fourth radiator 212, the electrical length of the parasitic radiator corresponding to the intermediate-frequency antenna can be reduced. At the same time, the first radio frequency circuit 501 connects the radio frequency signal in the intermediate frequency band to the first feeding point 114 of the first radiator 111 through the first feeder 503, and the second feeding point 116 and the third feeding point 119 are both in an open state, forming an IFA metal frame antenna whose operating frequency can cover the intermediate frequency band.

[0117] When the length of the first radiator 111 is L1, the length from the first feeding point 114 to the end connecting material and returning to the ground should be controlled within the range of 0.2 - 0.5L1, and the intermediate-frequency antenna can obtain better initial impedance. The length (L1) of the first radiator 111 should be set within the range of 0.15 - 0.35λ MB where λ MB is the dielectric wavelength corresponding to the highest operating frequency (2.40 GHz) in the intermediate frequency band. When the length (L1) of the first radiator 111 is 0.25λ MBWhen setting, the switching of the antenna operating frequency in the B3 / B1 / B40 frequency bands can be achieved by bridging a capacitive circuit or opening the circuit (since the width of the break is 1.2 mm, the coupling between the metal frames shows a weak capacitance when the bridging circuit is open). At this time, the field distribution uniformity of the first radiator 111 and the second radiator 112 is better, and the intermediate-frequency antenna can obtain higher efficiency.

[0118] The length (L 23 ) of the fifth return point 118 from the first break should be as consistent as possible with the length (L1) of the first radiator 111, and it can be adjusted within the range of 0.7 - 1.3L1 according to actual needs. It should be noted that due to the large change in the size of the intermediate-frequency antenna and the low-frequency antenna, the length of the fifth return point 118 from the end of the second radiator 112 connected to the ground may be close to or exceed the length (L1) of the first radiator 111. At this time, the distance between the two return points is large, and the third feeding point 119 can be used as an additional return point to avoid unnecessary clutter in the intermediate-frequency band. In addition, the length (L3) of the third radiator 211 and the length (L1) of the first radiator 111 should be as consistent as possible, and the length (L 43 ) of the sixth return point 216 from the second break and the fifth return point 118 (L 23 ) should be as consistent as possible. In this way, the coupling effect between the main and sub-fuselages when the folding screen device is in the folded state can be fully utilized to excite a current distribution in the third radiator 211 and the fourth radiator 212 in the same direction as that of the first radiator 111 and the second radiator 112, thereby obtaining better antenna performance.

[0119] For further understanding, the structural principle of the reconstruction component 700 in the second working state in the following embodiment Figure 7 shown will be explained:

[0120] As an example of the use of the antenna solution included in this application, the basic structure of the high-frequency antenna realized by the reconstruction and reuse of the radiator is as Figure 10 shown. Among them, the first return point 115, the second return point 117, the third return point 214, the fourth return point 215, the fifth return point 118, and the sixth return point 216 are all in the short-circuit state. By adjusting the positions of the return points of each radiator and reducing the electrical length of the radiator, it can work in a higher frequency band. At the same time, the high-frequency radio frequency signal is connected to the second feeding point 116 of the first radiator 111 through the second feeder 504, and the first feeding point 114 and the third feeding point 119 are both in the open state, forming an IFA metal frame antenna whose operating frequency can cover the high-frequency band.

[0121] When the length of the first return point 115 from the first break is L 12When it is, the length of the second feeding point 116 from the first grounding point 115 should be controlled within the range of 0.2 - 0.5L 12 so that the high - frequency antenna can obtain a better initial impedance. The length of the first grounding point 115 from the first slot (L 12 ) should be set within the range of 0.15 - 0.35λ HB , where λ HB is the dielectric wavelength corresponding to the highest operating frequency (3.60 GHz) in the high - frequency band. However, considering the use of a bridging tuning circuit to adjust the operating frequency of the antenna within the high - frequency band, when the length of the first grounding point 115 from the first slot (L 12 ) is set according to 0.22λ HB , the switching of the antenna operating frequency in the B41 / N78 band can be realized by bridging a capacitive circuit or an open - circuit (since the width of the slot is 1.2 mm, the coupling between the metal frames shows a weak capacitance when the bridging circuit is open - circuit). At this time, the field distribution uniformity of the radiators at both ends of the slot is better, and the high - frequency antenna can obtain higher efficiency.

[0122] The length of the second grounding point 117 from the first slot (L 22 ) should be kept as consistent as possible with that of the first grounding point 115 (L 12 ), and it can be adjusted within the range of 0.7 - 1.3L 12 according to actual needs. It should be particularly noted that, similar to the situation when constructing the intermediate - frequency antenna, since the length of the fifth grounding point 118 from the end of the second radiator 112 connecting to the ground may be greater than the length of the first grounding point 115 from the first slot (L 12 ), at this time, the third feeding point 119 can be used as an additional grounding point to avoid generating unnecessary clutter in the intermediate - frequency band. In addition, the length of the third grounding point 214 from the second slot (L 32 ) and that of the first grounding point 115 (L 12 ) should be kept as consistent as possible, and the length of the fourth grounding point 215 from the second slot (L 42 ) and that of the second grounding point 117 (L 22 ) should be kept as consistent as possible. In this way, the coupling effect between the main and sub - bodies of the folding - screen device when it is in the folded state can be fully utilized to excite a current distribution in the third radiator 211 and the fourth radiator 212 that is the same as that of the first radiator 111 and the second radiator 112, and thus better antenna performance can be obtained.

[0123] As an example of the use of the antenna scheme of the folding - screen device included in this application, the metal - frame antenna on the side is constructed according to the basic structure as shown in Figure 7 . Through the reconstruction and reuse of multiple radiators, a low - frequency antenna as shown in Figure 8 can be constructed, such asFigure 9 the intermediate-frequency antenna shown, and as Figure 10 the high-frequency antenna shown. The average total efficiency of the antenna is shown in Table 2.

[0124] Table 2

[0125]

[0126] As an example of the use of the antenna solution for the foldable screen device included in this application, since the operating frequency of the antenna is adjusted within the corresponding frequency band by means of a bridging tuning circuit (capacitive), and the length of the radiator formed by reconstruction and reuse is designed according to the upper limit of the operating frequency in each frequency band, the performance of the intermediate-frequency antenna in the B40 frequency band is slightly better than that in the B1 and B3 frequency bands, and the performance of the high-frequency antenna in the N78 frequency band is slightly better than that in the B41 frequency band. Since the length of the parasitic radiation stub of the low-frequency antenna is limited, its performance in the low-frequency band is relatively balanced.

[0127] In this embodiment, relative to Figure 3 the embodiment shown, the space on the side of the foldable screen device is further utilized. Without changing the number and position of the slits, by reconstructing and reusing multiple radiators, high-performance low-frequency, intermediate-frequency, and high-frequency antennas are constructed; since the low-frequency, intermediate-frequency, and high-frequency antennas all adopt the bridging tuning circuit method to adjust the operating frequency of the antenna within the corresponding frequency band, the devices constituting the tuning circuit can be reused; the proportion of the longitudinal current of the floor 400 excited by the low-frequency antenna can be effectively increased, the uniformity of the radiator field distribution can be improved, and the coupling effect between the adjacent radiators of the main and auxiliary bodies is utilized to excite the longitudinal current of the floor 400 with the same direction in the main and auxiliary bodies, thereby improving the performance of the low-frequency antenna.

[0128] Optionally, please refer to Figure 11 , the fourth radiator 212 further includes a sixth ground point 216, the foldable screen device further includes a sixth switch 510, and the sixth ground point 216 is grounded through the sixth switch 510;

[0129] The foldable screen device further includes a first tuning circuit 505 and a second tuning circuit 508. The first tuning circuit 505 is bridged across the first slit 113, and the first radiator 111 is electrically connected to the second radiator 112 through the first tuning circuit 505. The second tuning circuit 508 is bridged across the second slit 213, and the third radiator 211 is electrically connected to the fourth radiator 212 through the second tuning circuit 508;

[0130] When the reconstruction component 700 is in the first working state or the second working state, the sixth switch 510 is in the conducting state;

[0131] When the reconstruction component 700 is in the third working state, the sixth switching element 510 is in an off state.

[0132] For ease of understanding, the structural principle of the Figure 11 illustrated embodiment will be further explained below:

[0133] As an example of the use of the antenna solution included in this application, the structure of the metal frame antenna located on the side is as Figure 11 shown. The first radiator 111 is provided with a first feeding point 114, which is connected to the first radio frequency circuit 501 through a feeder line and is used for radio frequency signals in the middle frequency band and the high frequency band. There is no longer a separate distinction for the feeding points and radiators in the middle frequency band and the high frequency band, and the middle frequency antenna and the high frequency antenna are combined. The second radiator 112 is provided with a third feeding point 119, which is connected to the second radio frequency circuit 511 through a feeder line and is used for radio frequency signals in the low frequency band. The second radiator 112 is provided with a fifth ground return point 118 and is grounded through a switching device. By controlling the on / off of the switching device, the electrical length of the second radiator 112 can be changed. The switching device here is not specifically limited and can be a single device such as a switch, inductor, capacitor, resistor, or a circuit composed of multiple devices.

[0134] When the first radiator 111 is used as the excited radiation branch of the medium-high frequency antenna, it obtains energy through the transmission line from the first radio frequency circuit 501 and radiates it. The remaining radiators all serve as the coupled radiation branches of the medium-high frequency antenna. When the second radiator 112 is used as the excited radiation branch of the low frequency antenna, it obtains energy through the transmission line from the second radio frequency circuit 511 and radiates it. The remaining radiators can serve as the coupled radiation branches of the low frequency antenna. Therefore, the first radiator 111 and the second radiator 112 are both the excited radiation branches of their corresponding operating frequency bands and the parasitic radiation branches of their corresponding non-operating frequency bands.

[0135] Both the low frequency antenna and the medium-high frequency antenna adopt the method of a bridging tuning circuit to adjust the operating frequency of the antenna within the frequency band corresponding to the antenna, and the components included in the tuning circuit can be reused. According to the requirements of the electrical length of the radiator and the operating frequency, the bridging circuit can present different states such as short circuit, open circuit, capacitive, and inductive, which are not specifically limited here. However, it should be noted that only when the current distribution directions of the first radiator 111 and the second radiator 112 are the same can better antenna performance be obtained.

[0136] The fourth radiator 212 located in the auxiliary fuselage is provided with a sixth return point 216. By controlling the on / off of the corresponding switching device, the electrical length of the fourth radiator 212 can be changed. The switching device here is not specifically limited and can be a single device such as a switch, inductor, capacitor, resistor, or a circuit composed of multiple devices. In addition, the tuning circuit is placed across both ends of the second slot. By controlling the conduction of the corresponding lumped element through the switching device, the operating frequency of the antenna is adjusted. According to the requirements of the radiator electrical length and operating frequency, the bridging circuit can present different states such as short circuit, open circuit, capacitive, and inductive, which are not specifically limited here.

[0137] As an example of the use of the antenna solution included in this application, such as Figure 11 For the structure of the metal frame antenna shown, through the reconstruction and reuse of the radiator, low-frequency antennas and medium-high-frequency antennas can be realized within the limited area of the side frame of the folding screen device. Among them, the low-frequency antenna operates in the B28 band (0.703 - 0.803 GHz), B5 band (0.824 - 0.894 GHz), and B8 band (0.88 - 0.96 GHz), and the medium-high-frequency antenna operates in the B3 band (1.71 - 1.88 GHz), B1 band (1.92 - 2.17 GHz), B40 band (2.30 - 2.40 GHz), B41 band (2.496 - 2.69 GHz), and N78 band (3.30 - 3.60 GHz). The first radio frequency circuit 501 can be understood as a radio frequency signal source for the middle and high frequency bands, and the second radio frequency circuit 511 can be understood as a radio frequency signal source for the low frequency band. Its internal structure and device form are not specifically limited here.

[0138] For further ease of understanding, the following Figure 11 explains the structural principle in the case where the reconstruction component 700 is in the third working state in the embodiment shown, where the first band is the middle frequency band and the second band is the high frequency band:

[0139] As an example of the use of the antenna solution included in this application, the basic structure of the low-frequency antenna realized through the reconstruction and reuse of the radiator is as shown in Figure 12As shown. Among them, the location 118 of the fifth loop and the location 216 of the sixth loop are both in an open state, and the electrical length of each radiator is at the maximum value, thus meeting the large size requirements of the low-frequency antenna. At the same time, the second radio frequency circuit 511 connects the low-frequency band radio frequency signal to the third feeding point 119 of the second radiator 112 through the second feeder 504, and the first feeding point 114 is in an open state, forming an IFA metal frame antenna whose operating frequency can cover the low-frequency band. In order to obtain a better initial impedance of the antenna, the length from the third feeding point 119 to the end connecting the material back to the ground should be controlled within the range of 0.15 - 0.35L2, where L2 is the length of the second radiator 112.

[0140] As the low-frequency antenna solution included in this application, the length (L2) of the second radiator 112 should be set within the range of 0.25 - 0.35λ LB where λ LB is the dielectric wavelength corresponding to the highest operating frequency (0.96 GHz) in the low-frequency band. In the antenna solution as Figure 11 shown, the first radiator 111 not only serves as a parasitic radiation stub of the second radiator 112 in the low-frequency band, but also as an excited radiation stub of the medium-high frequency antenna. Therefore, the length (L1) of the first radiator 111 should be set within the range of 0.15 - 0.35λ MB where λ MB is the dielectric wavelength corresponding to the highest operating frequency (2.40 GHz) in the medium-frequency band. Considering that the working frequency of the antenna is adjusted in the low-frequency band by using a bridging tuning circuit, and the length of the parasitic radiation stub of the low-frequency antenna is less than that of the excited radiation stub (L1 < L2), when the length (L2) of the second radiator 112 is set according to 0.3λ LB the switching of the antenna working frequency in the B28 / B5 / B8 frequency bands can be achieved by bridging a capacitive circuit or an open circuit (since the width of the break is 1.2 mm, the coupling between the metal frames shows a weak capacitance when the bridging circuit is open). Compared with the traditional single-radiator scheme, the bridging tuning circuit scheme can still improve the uniformity of the radiator field distribution in the case of insufficient size of the parasitic radiation stub. Especially for the low-frequency antenna, it can effectively increase the proportion of the longitudinal current of the floor 400, thereby improving the efficiency of the antenna. In addition, the length (L3) of the third radiator 211 and the length (L1) of the first radiator 111 should be kept as consistent as possible, and the length (L4) of the fourth radiator 212 and the length (L2) of the second radiator 112 should be kept as consistent as possible. In this way, the coupling effect between the main body and the secondary body of the folding screen device in the folded state can be fully utilized to excite the longitudinal current of the floor 400 with the same direction in the main and secondary bodies, thereby obtaining better low-frequency antenna performance.

[0141] For further ease of understanding, the followingFigure 11 In the illustrated embodiment, the structural principle of the reconstruction component 700 in the first working state and the second working state will be explained as follows:

[0142] As an example of the use of the antenna solution included in the present application, the basic structure of the medium-high frequency antenna is realized through the reconstruction and reuse of the radiator as shown in Figure 13 the figure. Among them, both the fifth return point 118 and the sixth return point 216 are in a short-circuit state. By adjusting the return point positions of the second radiator 112 and the fourth radiator 212, the electrical length of the parasitic radiator corresponding to the medium-high frequency antenna can be reduced. At the same time, the first radio frequency circuit 501 connects the radio frequency signals in the medium frequency band and the high frequency band to the first feeding point 114 of the first radiator 111 through the first feeder 503, and the third feeding point 119 is in an open state, forming an IFA metal frame antenna whose operating frequency can cover the medium-high frequency band.

[0143] When the length of the first radiator 111 is L1, the length from the first feeding point 114 to the end connecting material to the ground should be controlled within the range of 0.2 - 0.5L1, and the medium-high frequency antenna can obtain a better initial impedance. It should be noted that the length (L1) of the first radiator 111 corresponding to this antenna solution should be set within the range of 0.15 - 0.35λ MB according to the size required by the medium frequency antenna, where λ MB is the dielectric wavelength corresponding to the highest operating frequency (2.40 GHz) in the medium frequency band. When the length (L1) of the first radiator 111 is set according to 0.23λ MB the switching of the antenna operating frequency in the B3 / B1 / B40 frequency bands can be realized by bridging a capacitive circuit or an open circuit (since the width of the break is 1.2 mm, the coupling between the metal frames shows a weak capacitance when the bridging circuit is open). At this time, the field distribution uniformity of the first radiator 111 and the second radiator 112 is better, and the medium-high frequency antenna can obtain higher efficiency in the medium frequency band. When using exactly the same radiator and feeding point and making the medium-high frequency antenna work in the high frequency band, since the size of the radiator is larger than the length required for the lowest operating frequency in the high frequency band, it is necessary to bridge an inductive circuit to realize the switching of the antenna operating frequency in the B41 / N78 frequency bands. At this time, the field distribution uniformity at both ends of the break is not significantly improved, but since the parasitic radiation branches effectively increase the radiation aperture of the antenna, the efficiency of the antenna in the high frequency band is still improved compared with the traditional single-radiator solution.

[0144] The length (L 24) should be as consistent as possible with the length (L1) of the first radiator 111, and it can be adjusted within the range of 0.7 - 1.3L1 according to actual needs. It should be noted that due to the large changes in the sizes of the mid - high - frequency antenna and the low - frequency antenna, the length from the fifth ground point 118 to the connection of the end of the second radiator 112 to the ground may be close to or exceed the length (L1) of the first radiator 111. At this time, the distance between the two ground points is large, and the third feeding point 119 can be used as an additional ground point to avoid unnecessary clutter in the mid - frequency band and high - frequency band. In addition, the length (L3) of the third radiator 211 and the length (L1) of the first radiator 111 should be as consistent as possible. The length (L 44 ) from the sixth ground point 216 to the second slot and the length (L 24 ) from the fifth ground point 118 should be as consistent as possible. In this way, the coupling effect between the main and secondary bodies of the folding - screen device when it is in the folded state can be fully utilized, and currents with the same direction as those of the first radiator 111 and the second radiator 112 can be excited in the third radiator 211 and the fourth radiator 212, thereby obtaining better antenna performance.

[0145] As an example of the use of the antenna solution for the folding - screen device included in this application, the metal - frame antenna on the side is in accordance with the basic structure as Figure 11 shown. Through the reconstruction and reuse of multiple radiators, a low - frequency antenna as shown in Figure 12 and a mid - high - frequency antenna as shown in Figure 13 can be constructed. The average total efficiency of the antenna is shown in Table 3.

[0146] Table 3

[0147]

[0148] As an example of the use of the antenna solution for the folding - screen device included in this application, since the mid - high - frequency antenna adjusts the operating frequency of the antenna by using a bridging tuning circuit (capacitive) in the mid - frequency band, the performance of the mid - high - frequency antenna in the B40 band is slightly better than that in the B1 band and B3 band. Since the mid - high - frequency antenna adjusts the operating frequency of the antenna by using a bridging tuning circuit (inductive) in the high - frequency band, the performance of the mid - high - frequency antenna in the B41 band is slightly better than that in the N78 band. In addition, due to the limited length of the parasitic radiation branches of the low - frequency antenna, its performance in the low - frequency band is relatively balanced.

[0149] In this embodiment, by combining the intermediate-frequency antenna and the high-frequency antenna, the feeding point and the radiator of the intermediate-frequency antenna are directly reused, greatly simplifying the implementation structure of the antenna solution and effectively utilizing the space of the side frame of the folding screen device. Although the performance of the antenna in the high-frequency band decreases slightly, compared with the traditional single-radiator high-frequency antenna solution, the efficiency of the antenna is still improved, and it has no impact on the performance of the antenna in the low-frequency and intermediate-frequency bands.

[0150] Optionally, the distance between the fifth return point 118 and the first slot 113 is equal to the length of the first radiator 111, the length of the first radiator 111 is equal to the length of the third radiator 211, the length of the second radiator 112 is equal to the length of the fourth radiator 212, and the length of the second radiator 112 is 0.25-0.35 times the third wavelength, where the third wavelength is the dielectric wavelength corresponding to the highest frequency point in the third frequency band.

[0151] In this embodiment, since the fifth return point 118 is grounded when the reconstruction component 700 is in the first working state and the second working state, at this time, the electrical length of the second radiator 112 is the distance between the fifth return point 118 and the first slot 113. Therefore, by making the distance between the fifth return point 118 and the first slot 113 equal to the length of the first radiator 111, the length of the first radiator 111 equal to the length of the third radiator 211, and the length of the second radiator 112 equal to the length of the fourth radiator 212, the coupling effect between the main and secondary bodies of the folding screen device when it is in the folded state can be fully utilized to excite a current distribution in the third radiator 211 and the fourth radiator 212 that is the same as that in the first radiator 111 and the second radiator 112, thereby obtaining better antenna performance. At the same time, by making the length of the second radiator 112 0.25-0.35 times the third wavelength, where the third wavelength is the dielectric wavelength corresponding to the highest frequency point in the third frequency band, the length of the second radiator 112 can be matched with the dielectric wavelength of the third frequency band. In this way, when the reconstruction component 700 is in the third working state, the radiation effect of the antenna can be improved.

[0152] Optionally, when the reconstruction component 700 is in the first working state or the second working state, the second radio frequency circuit 511 controls the third feeding point 119 to be grounded.

[0153] In this embodiment, since the length of the fifth return point 118 from the end of the second radiator 112 to the return ground may be close to or exceed the length (L1) of the first radiator 111, the distance between the two return points is relatively large at this time. The third feeding point 119 can be used as an additional return point, thereby avoiding unnecessary clutter in the middle frequency band and high frequency band.

[0154] Optionally, when the folding screen device is in the folded state and the first radiator 111 or the second radiator 112 is connected to an antenna signal, the direction of the current generated in the first radiation structure 600 is the same as the direction of the current generated in the second radiation structure 800.

[0155] In this embodiment, by making the direction of the current generated in the first radiation structure 600 the same as the direction of the current generated in the second radiation structure 800 when the folding screen device is in the folded state and the first radiator 111 or the second radiator 112 is connected to an antenna signal, thus effectively improving the efficiency of the antenna when the device is in the folded state.

[0156] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. A foldable screen device, characterized in that, Comprising: A first fuselage, a second fuselage, and a reconstruction component, wherein the first fuselage is rotatably connected to the second fuselage; The first fuselage includes a first radiator and a second radiator, there is a first slit between the first radiator and the second radiator, the second fuselage includes a third radiator and a fourth radiator, there is a second slit between the third radiator and the fourth radiator, one end of the first radiator away from the second radiator is grounded, one end of the second radiator away from the first radiator is grounded, one end of the third radiator away from the fourth radiator is grounded, and one end of the fourth radiator away from the third radiator is grounded. Wherein, when the folding screen device is in the folded state, the first radiator and the third radiator are opposite to each other, and the second radiator and the fourth radiator are opposite to each other; Among the first radiator and the second radiator, at least one is electrically connected to the reconstruction component; and among the third radiator and the fourth radiator, at least one is electrically connected to the reconstruction component; the reconstruction component is used to reconstruct the electrical length of the first radiation structure composed of the first radiator and the second radiator, and the reconstruction component is used to reconstruct the electrical length of the second radiation structure composed of the third radiator and the fourth radiator; The reconstruction component has at least two working states. Among the at least two working states, the electrical lengths of the first radiation structures corresponding to different working states are different, and the electrical lengths of the second radiation structures corresponding to different working states are different.

2. The folding screen device according to claim 1, wherein The folding screen device includes a first radio frequency circuit, the first radio frequency circuit is electrically connected to the first radiator, and the at least two working states include a first working state and a second working state; When the reconstruction component is in the first working state, the first radiator accesses the antenna signal of the first frequency band from the first radio frequency circuit; When the reconstruction component is in the second working state, the first radiator accesses the antenna signal of the second frequency band from the first radio frequency circuit; Wherein, the first working state corresponds to the first frequency band, the second working state corresponds to the second frequency band, and the first frequency band and the second frequency band are different frequency bands.

3. The folding screen device according to claim 2, wherein, The first radiator includes a first ground point, a first feeding point, and a second feeding point. The first ground point is located between the first feeding point and the second feeding point, and the second feeding point is located between the first ground point and the first slit. The reconstruction component includes a first switch. The first feeding point and the second feeding point are respectively electrically connected to the first radio frequency circuit, and the first ground point is grounded through the first switch; When the reconstruction component is in the first working state, the first switch is in the off state, and the first radiator accesses the antenna signal of the first frequency band from the first radio frequency circuit through the first feeding point; When the reconstruction component is in the second working state, the first switch is in the conducting state, and the first radiator accesses the antenna signal of the second frequency band from the first radio frequency circuit through the second feeding point. The maximum frequency value in the first frequency band is less than the minimum frequency value in the second frequency band.

4. The folding screen device according to claim 3, characterized in that, The folding screen device further includes a second switch, a third switch, a fourth switch, a first tuning circuit, and a second tuning circuit. The second radiator includes a second ground point, the third radiator includes a third ground point, and the fourth radiator includes a fourth ground point. The second ground point is grounded through the second switch, the third ground point is grounded through the third switch, and the fourth ground point is grounded through the fourth switch. The first tuning circuit is disposed across the first slit, and the first radiator is electrically connected to the second radiator through the first tuning circuit. The second tuning circuit is disposed across the second slit, and the third radiator is electrically connected to the fourth radiator through the second tuning circuit. When the reconstruction component is in the first working state, the second switch, the third switch, and the fourth switch are respectively in the off state. When the reconstruction component is in the second working state, the second switch, the third switch, and the fourth switch are respectively in the conducting state.

5. The foldable screen device according to any one of claims 1 to 4, characterized in that, The lengths of the first radiator, the second radiator, the third radiator, and the fourth radiator are equal.

6. The foldable screen device according to any one of claims 3 or 4, characterized in that, The length of the first radiator is 0.15 - 0.35 times the first wavelength, and the first wavelength is the dielectric wavelength corresponding to the highest frequency point in the first frequency band. The distance from the first ground point to the first slit is 0.15 - 0.35 times the second wavelength, and the second wavelength is the dielectric wavelength corresponding to the highest frequency point in the second frequency band.

7. The folding screen device according to claim 2, wherein, The folding screen device further includes a second radio frequency circuit. The second radiator includes a third feeding point, and the second radio frequency circuit is electrically connected to the third feeding point. The at least two working states further include a third working state. When the reconstruction component is in the third working state, the second radiator accesses the antenna signal of the third frequency band from the second radio frequency circuit through the third feeding point. The third frequency band is other frequency bands outside the first frequency band and the second frequency band.

8. The folding screen device according to claim 7, wherein, The second radiator further includes a fifth ground point located between the third feeding point and the first slit. The reconstruction component further includes a fifth switch, and the fifth ground point is grounded through the fifth switch. The maximum frequency value in the third frequency band is less than the minimum frequency value in the first frequency band, and the maximum frequency value in the third frequency band is less than the minimum frequency value in the second frequency band. When the reconstruction component is in the first working state or the second working state, the fifth switch is in the conducting state. When the reconstruction component is in the third working state, the fifth switch is in the off state.

9. The folding screen device according to claim 8, wherein The first radiator further includes a first return point, the second radiator includes a second return point, the third radiator includes a third return point, the fourth radiator includes a fourth return point and a sixth return point, and the folding screen device further includes a first switch, a second switch, a third switch, a fourth switch and a sixth switch. The first return point is grounded through the first switch, the second return point is grounded through the second switch, the third return point is grounded through the third switch, the fourth return point is grounded through the fourth switch, and the sixth return point is grounded through the sixth switch. The second return point is located between the fifth return point and the first slit, and the fourth return point is located between the second slit and the sixth return point; When the reconstruction component is in the first working state, the first switch, the second switch, the third switch and the fourth switch are respectively in the off state, and the sixth switch is in the on state; When the reconstruction component is in the second working state, the first switch, the second switch, the third switch, the fourth switch and the sixth switch are respectively in the on state, When the reconstruction component is in the third working state, the first switch, the second switch, the third switch, the fourth switch and the sixth switch are respectively in the off state.

10. The folding screen device according to claim 8, characterized in that, The fourth radiator further includes a sixth return point, and the folding screen device further includes a sixth switch. The sixth return point is grounded through the sixth switch; The folding screen device further includes a first tuning circuit and a second tuning circuit. The first tuning circuit straddles the first slit, and the first radiator is electrically connected to the second radiator through the first tuning circuit. The second tuning circuit straddles the second slit, and the third radiator is electrically connected to the fourth radiator through the second tuning circuit; When the reconstruction component is in the first working state or the second working state, the sixth switch is in the on state; When the reconstruction component is in the third working state, the sixth switch is in the off state.

11. The folding screen device according to any one of claims 8 to 10, characterized in that, The distance between the fifth return point and the first slit is equal to the length of the first radiator. The length of the first radiator is equal to the length of the third radiator. The length of the second radiator is equal to the length of the fourth radiator. The length of the second radiator is 0.25-0.35 times the third wavelength, and the third wavelength is the dielectric wavelength corresponding to the highest frequency point in the third frequency band.

12. The folding screen device according to any one of claims 8 to 10, characterized in that, When the reconstruction component is in the first working state or the second working state, the second RF circuit controls the third feeding point to be grounded.

13. The folding screen device according to claim 1, 2, 3, 4, 7, 8, 9 or 10, characterized in that, When the folding screen device is in the folded state and the first radiator or the second radiator accesses an antenna signal, the direction of the current generated in the first radiation structure is the same as the direction of the current generated in the second radiation structure.

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