Electronic device

Abstract

The application discloses an electronic device, comprising: a first antenna and a second antenna; in the case where a first body and a second body of the electronic device are in a folded state, a direction of a first current generated by the first antenna being excited by a feed end of the first antenna is a first direction, and a direction of a second current generated by the second antenna being excited by a feed end of the second antenna is a second direction, wherein the first direction and the second direction are opposite.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of terminal equipment, in particular to an electronic device. BACKGROUND

[0002] The folding electronic device is connected by a mechanical hinge. The folding electronic device has two states, unfolded and folded, in daily use. A user can obtain two different experiences. The folding electronic device brings convenience to the user, but the design of the antenna system of the folding electronic device faces many challenges.

[0003] In some scenarios, the two screens of the folding electronic device are covered by a flexible screen. When the folding electronic device is in a folded state, the flexible screen covering the two screens of the electronic device is in a bent state. The Indium tin oxide (ITO) layer between the flexible screen in the bent state forms a cavity. The resonant frequency of the cavity is within the working frequency band of the electronic device antenna system, thereby causing energy loss to the working frequency band of the antenna, and the antenna performance of the electronic device is poor. SUMMARY

[0004] The purpose of the embodiments of the present application is to provide a form recognition method, an electronic device, and a terminal device, which can solve the problem of poor antenna performance of the electronic device.

[0005] The electronic device provided by the embodiments of the present application includes a first antenna and a second antenna. When the first body and the second body of the electronic device are in a folded state, the direction of the first current generated by the first antenna excited by the feed end of the first antenna is a first direction, and the direction of the second current generated by the second antenna excited by the feed end of the second antenna is a second direction.

[0006] The technical solution disclosed by the embodiments of the application includes: when the first body and the second body of the electronic device are in a folded state, the direction of the first current generated by the first antenna excited by the feed end of the first antenna is a first direction, and the direction of the second current generated by the second antenna excited by the feed end of the second antenna is a second direction, wherein the first direction and the second direction are opposite. In this way, the current directions of the first antenna and the second antenna are opposite, and the excitation signal received by the resonant cavity is the vector sum of the first current and the second current. Since the directions of the first current and the second current are opposite, the currents will cancel each other out, reducing their impact on the antenna. Further, by arranging the first antenna and the second antenna, a Multiple-Input Multiple-Out-put (MIMO) antenna can be formed, improving the communication performance of the entire electronic device. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 This illustration shows a structural schematic diagram of an electronic device provided in an embodiment of this application;

[0008] Figure 2 This diagram illustrates the structure of an electronic device in an unfolded state, as provided in an embodiment of this application.

[0009] Figure 3 This illustration shows a structural diagram of an electronic device in a folded state according to an embodiment of this application;

[0010] Figure 4 and Figure 5 This diagram illustrates the distribution of ITO clutter current according to an embodiment of this application.

[0011] Figure 6 This diagram illustrates the structure of a metal frame for an electronic device according to an embodiment of this application.

[0012] Figures 7 to 10 This diagram illustrates the distribution structure of a first antenna and a second antenna according to an embodiment of this application. Detailed Implementation

[0013] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0014] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0015] As mentioned above, when the foldable electronic device is in a folded state, the electromagnetic field coupling between the two screens is strong after the two screens are folded. A cavity is formed between the ITO layers of the two screens, which excites the cavity mode of the ITO. The resonant frequency of this cavity is exactly within the operating frequency band of the antenna system of the electronic device, introducing clutter into the original antenna's frequency band, thereby causing energy loss in the frequency band where the antenna can operate, resulting in poor antenna performance of the electronic device.

[0016] The electronic device provided by the embodiments of the present application will be described in detail below in combination with the drawings, specific embodiments and application scenarios thereof.

[0017] As shown in Figure 1 , a structural schematic diagram of an electronic device provided by the embodiments of the present application is shown, which can be a folding electronic device, such as a folding screen mobile phone, etc. The electronic device 10 comprises a first antenna 101 and a second antenna 102. In the case that the first body and the second body of the electronic device are in a folded state, the direction of the first current generated by the first antenna 101 excited by the feed end of the first antenna 101 is the first direction, and the direction of the second current generated by the second antenna 102 excited by the feed end of the second antenna 102 is the second direction, wherein the first direction and the second direction are opposite.

[0018] That is, the excitation signal received by the resonant cavity formed when the first body and the second body are in the folded state is the vector sum of the first current and the second current.

[0019] Specifically, for a folding electronic device, it has a first body and a second body, wherein the first body can be a main body, and the second body can be a secondary body. The first body and the second body can be connected by a connecting component such as a rotating shaft or a hinge. The first body and the second body can be rotated by the connecting component to change the included angle between the first body and the second body, and further to switch the electronic device between the folded state and the unfolded state, as shown in Figure 2 , when the electronic device is in the unfolded state, the first body 103 and the second body 104 are in the same horizontal plane, and when the electronic device is in the folded state, as shown in Figure 3 , the first body 103 and the second body 104 can be mutually attached. The first body 103 and the second body 104 each comprise a display module, which includes but is not limited to a display screen, an ITO layer and a metal middle frame, etc. When the first body 103 and the second body 104 are in the folded state, the ITO layers of the two display modules of the first body 103 and the second body 104 will form a resonant cavity. The resonant frequency of the resonant cavity can be exactly in the working frequency band of the electronic device. The resonant cavity formed by the two ITO layers of the first body 103 and the second body 104 of the electronic device cannot radiate energy, thereby causing energy loss and poor performance of the antenna of the electronic device.

[0020] After analyzing the ITO clutter formed by the resonant cavity formed by the two ITO layers of the first body and the second body, it is found that the electromagnetic field distribution of the ITO clutter of 0.7GHz can be equivalent to the basic mode TE101 mode, and the electromagnetic field distribution of 1.0GHz can be equivalent to the TE102 mode, as shown inFigure 4 and Figure 5 It can be found from the distribution of ITO clutter current shown in FIG. 5 that the current zero point (electric field intensity point) of the ITO clutter current is mainly distributed in the edge area far from the hinge connecting the first body and the second body, and it is difficult to excite the ITO clutter in the area close to the rotation shaft part of the first body and the second body of the electronic device. Among them, Figure 4 and Figure 5 The dashed line in FIG. 6 represents an open circuit, Figure 4 FIG. 7 shows the distribution of the electromagnetic field of the clutter at 0.7 GHz, Figure 5 FIG. 8 shows the distribution of the electromagnetic field of the clutter at 1 GHz.

[0021] Through the above analysis, the embodiments of the present application set two antennas, which can be set at the middle position of the metal middle frame of the first body away from the rotation shaft, or set at the middle position of the metal middle frame of the second body away from the rotation shaft, or the first antenna 101 is set at the first body and the second antenna 102 is set at the second body. The second body weakens the influence of the cavity clutter formed by the ITO layer of the two bodies of the electronic device in the folded state of the electronic device, and through the common mode and differential mode theory, the direction of the current generated by the first antenna 101 excited by the feed end of the first antenna 101 is opposite to the direction of the current generated by the second antenna 102 excited by the feed end of the second antenna 102, and the excitation signal received by the ITO cavity is the vector sum of the current of the first antenna 101 and the current of the second antenna 102, so that the electromagnetic field vector coupled on the ITO cavity cancels out, and the influence of the ITO cavity mode is weakened.

[0022] The metal middle frame is a metal support under the ITO layer, as shown in FIG. 9, Figure 6 As shown in FIG. 10, the metal middle frame 105 can be a metal edge arranged around the first body and the second body, and at least part of the metal middle frame can be used as the first antenna 101 and the second antenna 102. The feed end refers to the signal input path of the antenna, and the feed end of the first antenna 101 refers to the signal input path of the first antenna 101, and the feed end of the second antenna 102 refers to the signal input path of the second antenna 102.

[0023] According to the technical solution disclosed in this application, when the first and second bodies of the electronic device are in a folded state, the direction of the first current generated by the feed end of the first antenna is a first direction, and the direction of the second current generated by the feed end of the second antenna is a second direction, wherein the first and second directions are opposite. Thus, the current directions of the first and second antennas are opposite, and the excitation signal received by the resonant cavity is the vector sum of the first and second currents. Since the first and second currents are in opposite directions, they cancel each other out, reducing their impact on the antenna. Furthermore, by setting the first and second antennas, a MIMO antenna can be constructed, improving the overall communication performance of the electronic device.

[0024] In one possible implementation, both the first antenna 101 and the second antenna 102 are located in the first edge region of the first fuselage or the second edge region of the second fuselage. The feed terminal of the first antenna 101 is located at a first position in the first edge region, and the feed terminal of the second antenna 102 is located at a second position in the first edge region, wherein the first position and the second position are different. Alternatively, the feed terminal of the first antenna 101 is located at a third position in the second edge region, and the feed terminal of the second antenna 102 is located at a fourth position in the second edge region, wherein the third position and the fourth position are different.

[0025] Specifically, the first edge region can be the outer periphery of the first fuselage, and the second edge region can be the outer periphery of the second fuselage. For example, as... Figure 6 As shown, the outer perimeter area is where the metal frame is located.

[0026] The first fuselage and the second fuselage are connected by a connecting component. The first edge region is the region opposite to and away from the connecting component, and the second edge region is the region opposite to and away from the connecting component. For example, such as... Figure 7 As shown, the first edge region and the second edge region can be the middle position of the metal frame away from and opposite to the connecting component. The first antenna 101 is denoted as ANT1, the second antenna 102 as ANT2, and the connecting component can be a pivot. When the first antenna 101 and the second antenna 102 are located in the first edge region of the first fuselage or in the second edge region of the second fuselage, the first antenna 101 is... Figure 7 In the efg segment, the second line 102 is... Figure 7 In the CBA segment, the feed terminal (Feed1) of the first antenna 101ANT1 is... Figure 7The position of 'e' is the same as the first and third positions mentioned above. The current I1 generated by the feed terminal (Feed1) of the first antenna 101ANT1 is excited by the feed terminal (Feed1). The branch radiated by the current generated by this excitation is efg, meaning the direction of the current I1 generated by the feed terminal (Feed1) of the first antenna 101ANT1 is from 'e' to 'g'. The feed terminal (Feed2) of the second antenna 102ANT2 is... Figure 7 The position 'c' is the same as the second and fourth positions mentioned above. The feed terminal (Feed2) of the second antenna 102ANT2 excites the current generated by the second antenna 102, which is I2. The branch radiated by the current generated by this excitation is cba, meaning the direction of the current I2 generated by the feed terminal (Feed2) of the second antenna 102ANT2 is from c to a. It can be seen that the current I2 generated by the second antenna 102ANT2 is equal to - the current I1 generated by the first antenna 101ANT1. For the ITO resonant cavity, the excitation signal it receives is equivalent to I, which is the vector sum of the first current generated by the first antenna 101ANT1 and the second current generated by the second antenna 102ANT2.

[0027] Furthermore, in order to minimize the impact of the ITO resonant cavity on the antenna's energy, the influence of the ITO resonant cavity on the antenna's energy is minimized when the vector sum of the currents received by the ITO resonant cavity is zero. Therefore, in this embodiment, the amplitudes of the first current and the second current are equal, that is, as described above, the vector sum of currents I1 and I2 is zero, i.e., I = I1 + I2 = 0. Thus, by placing the first antenna 101 and the second antenna 102 in a region far from and opposite to the axis connecting the first and second fuselages, the superimposed current vectors received by the ITO resonant cavity cancel each other out, reducing the impact of the ITO resonant cavity on the antenna's frequency band and improving the antenna's performance.

[0028] More specifically, such as Figure 7 As shown, the first and second positions can be symmetrical about the fifth position of the first edge region, or the third and fourth positions can be symmetrical about the sixth position of the second edge region. The fifth and sixth positions are the positions of the aforementioned point d. When the first and second positions are symmetrical about the fifth position, the aforementioned segment bc = segment ef, and segment ab = segment fg.

[0029] In one possible implementation, the first antenna 101 is disposed in the third edge region of the first fuselage, and the second antenna 102 is disposed in the fourth edge region of the second fuselage. Both the first antenna 101 and the second antenna 102 include at least a portion of the metal frame of the first fuselage. Alternatively, both the first antenna 101 and the second antenna 102 include at least a portion of the metal frame of the second fuselage. Or, the first antenna 101 includes at least a portion of the metal frame of the first fuselage, and the second antenna 102 includes at least a portion of the metal frame of the second fuselage.

[0030] Specifically, the first antenna 101 and the second antenna 102 can be respectively installed on different fuselages, and the third edge area can be the first fuselage, such as... Figure 6 The location of the metal frame shown indicates that the fourth edge area could be the second fuselage, such as... Figure 6 The location of the metal frame is shown. To ensure a certain degree of isolation between the first antenna 101 and the second antenna 102 when the electronic device is in the unfolded state, and to avoid affecting the working performance of the antennas, thereby improving the stability and reliability of the antenna operation, the first adjacent position and the second adjacent position are not opposite each other when the first and second bodies of the electronic device are in the folded state. That is to say, when the first and second bodies of the electronic device are in the folded state, the first adjacent position and the second adjacent position are staggered, thereby avoiding the first adjacent position and the second adjacent position being too close and affecting the working performance of the antenna.

[0031] To ensure maximum isolation between the first antenna 101 and the second antenna 102 when the electronic device is in its deployed state, the feed terminal of the second antenna 102 can be located at the top left corner of the first body, and the feed terminal of the first antenna 101 can be located at the bottom right corner of the second body. This maximizes the physical distance between the feed terminals of the first antenna 101 and the second antenna 102 when the electronic device is in its deployed state, thus ensuring optimal isolation between the two antennas, preventing mutual interference, and further improving antenna performance. Specifically, the first antenna 101 includes a first sub-antenna and a second sub-antenna, and the third edge region includes a first edge sub-region and a second edge sub-region, which are adjacent to each other. The first sub-antenna is located in the first edge sub-region, the second sub-antenna is located in the second edge sub-region, and the feed terminal of the first antenna 101 is located at the first adjacent position of the first edge sub-region and the second edge sub-region. The second antenna 102 includes a third sub-antenna and a fourth sub-antenna. The fourth edge region includes a third edge sub-region and a fourth edge sub-region. The third edge sub-region and the fourth edge sub-region are adjacent to each other. The third sub-antenna is located in the third edge sub-region, and the fourth sub-antenna is located in the fourth edge sub-region. The feed end of the second antenna 102 is located at the second adjacent position between the third edge sub-region and the fourth edge sub-region.

[0032] Specifically, such as Figure 8 As shown, the first antenna 101 is located in the lower right corner of the first fuselage. The first antenna 101 is composed of the short side of the lower part of the first fuselage and the long side of the right side, including segments abcd. The feed terminal 103 of the first antenna 101 is located at the intersection point b (first adjacent position) of segments ab (first sub-antenna) and cd (second sub-antenna). The direction of the current I1 excited by the feed terminal of the first antenna 101 is from b to d. The first antenna 101 is composed of a metal frame of segments 102abcd, which is a T-antenna in shape. It mainly excites the monopole state of segment bc. When the first antenna 101 is working, it mainly radiates through the aforementioned stubs of segment bc. At this time, the first current I1 generated by the first antenna 101 is mainly concentrated in segment bc.

[0033] like Figure 9As shown, the second antenna 102 is located at the upper left corner of the second body, and is composed of the short side of the upper part of the second body and the long side of the left side, including the efgh segment, the feeding end of the second antenna 102 is located at the intersection f (the second adjacent position) of the ef segment (the third sub-antenna) and the fh segment (the fourth sub-antenna), and the direction of the current I2 generated by the second antenna 102 excited by the feeding end of the second antenna 102 is from f to h, which is opposite to the direction of the current I1 generated by the first antenna 101. Wherein, the second antenna 102 is composed of the metal frame of the structure efgh segment, and the antenna form is also a T antenna, mainly exciting the monopole state of fg branch, when the second antenna 102 works, mainly relying on fg branch radiation, at this time, the second current I2 is mainly concentrated in the fg segment.

[0034] Further, in order to weaken the influence of the ITO resonant cavity on the antenna to the greatest extent, when the vector sum of the current received by the ITO resonant cavity is zero, the influence of the ITO resonant cavity on the antenna can be guaranteed to be the smallest, therefore, the amplitudes of the first current and the second current in the embodiment of the application are equal, that is, according to the above description, the vector sum of the current I1 and the current I2 is zero, that is, I = I1 + I2 = 0.

[0035] As can be seen from the above embodiment, the current excited by the feeding end of the first antenna 101 and the current excited by the feeding end of the second antenna 102 are opposite, and the following will be described in combination with Figure 10 Further description will be made to the above embodiment, please refer to Figure 10 , when the electronic device is in the folded state, the two ITO layers of the electronic device are folded to form a single-end short-circuit and three-end open-circuit resonant cavity, the current excited by the feeding end of the first antenna 101 and the current excited by the feeding end of the second antenna 102 are equal in amplitude and opposite in direction, for the ITO resonant cavity, the equivalent coupling current I = I1 + I2 = 0. At this time, the ITO cavity mode wave influence is weakened.

[0036] Further, the first antenna 101 and the second antenna 102 are both inverted F type (Inverted-F Antenna, IFA) antennas, for the IFA antenna, a half-wave mode can be excited.

[0037] It should be noted that, in the present document, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element. Furthermore, it is to be understood that the method and apparatus of the present application can be carried out by more than one process, method, article, or apparatus either simultaneously, concurrently, or with intervening action that are carried out at the same time, either in a simultaneous fashion or in a fashion that is interleaved in time. For example, the described methods can be performed in a different order from that described, and / or various steps can be combined or omitted, and / or additional steps can be added, without departing from the scope of the described methods. Also, features described with respect to certain examples can be combined in other examples.

[0038] From the above description of the embodiments, it is apparent that the method of the above-described embodiments can be realized by means of software and general-purpose hardware platforms. Of course, it can also be realized by hardware, but in many cases, the former is a better embodiment. Based on such an understanding, the technical solutions of the present application, essentially or in other words, the part that contributes to the prior art, can be embodied in the form of a computer software product, which is stored in a storage medium (such as a ROM / RAM, a magnetic disk, or an optical disk) and includes a number of instructions to make a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) execute the methods of various embodiments of the present application.

[0039] The embodiments of the present application are described above in conjunction with the drawings, but the present application is not limited to the above-described specific embodiments, which are merely illustrative rather than restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the protection scope of the claims.

Claims

1. An electronic device, comprising: The application relates to an electronic device antenna system. The ITO layer of the flexible screen covering the first body and the second body of the electronic device constitutes an ITO cavity when the first body and the second body are in a folded state, the resonant frequency of the ITO cavity is within the working frequency band of the electronic device antenna system, the direction of the first current generated by the first antenna is a first direction, the direction of the second current generated by the second antenna is a second direction, and the first direction and the second direction are opposite. The first antenna is arranged at a third edge region of the first body, and the second antenna is arranged at a fourth edge region of the second body. The first antenna comprises a first sub antenna and a second sub antenna, the third edge region comprises a first edge sub region and a second edge sub region, and the first edge sub region and the second edge sub region are adjacent. The first sub antenna is arranged at the first edge sub region, the second sub antenna is arranged at the second edge sub region, and the feeding end of the first antenna is arranged at a first adjacent position of the first edge sub region and the second edge sub region. The second antenna comprises a third sub antenna and a fourth sub antenna, the fourth edge region comprises a third edge sub region and a fourth edge sub region, and the third edge sub region and the fourth edge sub region are adjacent. The third sub antenna is arranged at the third edge sub region, the fourth sub antenna is arranged at the fourth edge sub region, and the feeding end of the second antenna is arranged at a second adjacent position of the third edge sub region and the fourth edge sub region. The first edge sub region, the second edge sub region, the third edge sub region and the fourth edge sub region are different edges. The first adjacent position and the second adjacent position are not opposite when the first body and the second body are in the folded state. The amplitudes of the first current and the second current are equal.

2. The electronic device of claim 1, wherein, The first antenna and the second antenna are both IFA antennas.

3. The electronic device of any of claims 1-2, wherein, The first antenna comprises at least part of the metal middle frame of the first body, and the second antenna comprises at least part of the metal middle frame of the second body.

4. The electronic device of claim 1, wherein, ​ 5. The electronic device of claim 1, wherein, ​

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