CN118117300A - Terminal equipment - Google Patents

Abstract

The application provides a terminal device, which relates to the technical field of communication, wherein the terminal device comprises: the display screen is covered on one side of the frame, the rear cover is covered on the other side of the frame, and the antenna and the metal layer are positioned between the display screen and the rear cover; the antenna comprises a first radiator and a second radiator, wherein one end of the first radiator is coupled with one end of the second radiator through a gap; the metal layer is respectively and indirectly coupled with the first radiator and the second radiator; the projection of the slit onto the display screen at least partially overlaps with the projection of the metal layer onto the display screen. The technical scheme provided by the application can improve the coupling quantity of the antenna.

Description

Terminal equipment

Technical Field

The application relates to the technical field of communication, in particular to terminal equipment.

Background

With the rapid development of terminal screen technology, the screen occupation ratio of terminal equipment such as mobile phones and flat plates is larger and larger, and the popularization of curved surface screens also enables the border area of the terminal equipment to be narrower and smaller, so that the layout space reserved for antennas on the terminal equipment is smaller and smaller, and difficulty is brought to antenna design.

Terminal devices often employ a plurality of metallic radiators arranged at intervals to form antennas, some of which require a large amount of coupling. The coupling amount of the antenna is related to the gap width between the antenna radiators and the cross-sectional area of the radiators, wherein the gap width is determined according to the structure production process, and the smaller the gap is, the greater the production difficulty is; the cross-sectional area of the radiator is determined according to the manufacturing process (e.g., chamfering the radiator on both sides of the slot) and the layout space of the antenna. Due to the influence of these factors, the terminal equipment is liable to have insufficient antenna coupling amount in the production process.

Disclosure of Invention

In view of this, the present application provides a terminal device for improving the coupling amount of an antenna.

In order to achieve the above object, an embodiment of the present application provides a terminal device, including: the display device comprises a frame, a display screen, a rear cover, an antenna and a metal layer, wherein the display screen is covered on one side of the frame, the rear cover is covered on the other side of the frame, and the antenna and the metal layer are positioned between the display screen and the rear cover;

The antenna comprises a first radiator and a second radiator, wherein one end of the first radiator and one end of the second radiator are coupled through a gap;

the metal layer is respectively and indirectly coupled with the first radiator and the second radiator;

The projection of the slit on the display screen at least partially overlaps with the projection of the metal layer on the display screen.

According to the terminal equipment provided by the embodiment of the application, the metal layer is respectively and indirectly coupled with the first radiator and the second radiator at two sides of the gap, so that the metal layer can respectively form coupling capacitance with the first radiator and the second radiator, and at the moment, the coupling capacitance between the first radiator and the second radiator of the antenna is as follows: the equivalent series capacitance of the coupling capacitance formed by the metal layer and the two radiators is connected in parallel with the coupling capacitance of the original gap to form a capacitance which is larger than the coupling capacitance formed by the original gap, so that the coupling capacitance between the radiators of the antenna is greatly increased, and the coupling quantity of the antenna can be effectively improved. And after the coupling quantity of the antenna is increased, the current on the first radiator is more easily coupled to the second radiator, and the current is dispersed, so that the SAR value of the antenna can be reduced.

In one possible implementation manner, the frame includes a metal frame, a part of the metal frame forms the first radiator, a part of the metal frame forms the second radiator, and the metal layer is disposed on a surface of a non-display area of the display screen.

In the above embodiment, the first radiator and the second radiator are formed of the metal frame, so that space can be saved; the metal layer is arranged on the surface of the non-display area of the display screen, and the mode is easy to realize and has lower cost.

In one possible implementation manner, the frame includes a non-metal frame, the first radiator and the second radiator are formed in the non-metal frame, an insulating medium layer is arranged between a non-display area of the display screen and the frame, and the metal layer is arranged on one face of the insulating medium layer facing the antenna.

In the above embodiment, the metal layer is disposed on a surface of the insulating dielectric layer facing the antenna, and the surface is closer to the antenna, so that the coupling amount can be more effectively improved.

In one possible implementation manner, part of the metal layer is arranged on one surface of the insulating medium layer facing the antenna, and the other part of the metal layer is arranged on the surface of the non-display area of the display screen.

Through the embodiment, the effect of increasing the coupling amount is realized by superposing the metal layers at two positions, so that the coupling amount requirement of the antenna can be better met.

In one possible implementation, the display screen is a curved screen, and the non-display area of the display screen includes at least a portion of an end surface area of an edge of the curved screen.

Through the embodiment, the display screen structure can be better utilized to realize the arrangement of the metal layer.

In a possible implementation manner, a side, close to the rear cover, of the frame extends inwards to form a connecting arm, a support is arranged on a side, close to the display screen, of the frame, the antenna is arranged between the support and the connecting arm, and an insulating medium layer is arranged between the antenna and the support;

the metal layer is disposed in at least one of the following locations: the insulating medium layer is arranged between the support and the connecting arm, one surface of the connecting arm, which is away from the antenna, and one surface of the support, which is away from the antenna.

By the embodiment, the arrangement of the metal layer can be realized by flexibly utilizing the space structure near the antenna.

In one possible implementation, the frame extends inward to form a connecting arm near one end of the rear cover, and the antenna is arranged between the rear cover and the connecting arm; the metal layer is arranged on one surface of the connecting arm, which is opposite to the antenna.

In the above embodiment, the metal layer is disposed on the surface of the connecting arm facing away from the antenna, and the metal layer is located closer to the antenna, so that the coupling amount can be more effectively improved.

In one possible embodiment, the first radiator and the second radiator are implemented in the form of FPC or LDS.

In one possible embodiment, the metal layer is a silver paste layer, a metal coating layer, or an FPC.

In one possible embodiment, the length of the metal layer in the first direction is greater than or equal to the length of the slit, and the first direction is the length direction of the slit.

By the above embodiment, the length of the metal layer in the width direction of the slit can be shortened.

Drawings

Fig. 1 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

Fig. 2 is a schematic structural diagram of a part of a longitudinal section of a terminal device according to an embodiment of the present application;

Fig. 3 is a schematic diagram of an antenna structure according to an embodiment of the present application;

fig. 4 is a schematic diagram of another antenna structure according to an embodiment of the present application;

fig. 5 is a schematic diagram of a positional relationship between an antenna and a metal layer according to an embodiment of the present application;

Fig. 6 is an equivalent circuit schematic diagram of an antenna and a metal layer according to an embodiment of the present application;

Fig. 7 is a schematic diagram of the positions of an antenna structure and a corresponding metal layer according to an embodiment of the present application;

Fig. 8 is a schematic diagram of the positions of another antenna structure and a corresponding metal layer according to an embodiment of the present application;

Fig. 9 is a schematic diagram of the positions of an antenna structure and a corresponding metal layer according to another embodiment of the present application;

Fig. 10 is a graph of performance simulation effects of the front and rear antennas with added metal layers according to the embodiment of the present application.

Detailed Description

Embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. The terminology used in the description of the embodiments of the application is for the purpose of describing particular embodiments of the application only and is not intended to be limiting of the application. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.

The terminal device in the embodiment of the application can be electronic devices with communication functions such as a mobile phone, a tablet, intelligent wearable equipment, vehicle-mounted equipment, a notebook computer and the like, and the specific type of the terminal device is not particularly limited. For convenience of explanation, in the embodiment of the present application, a terminal device is taken as an example of a mobile phone, and the technical scheme of the present application is illustrated.

Fig. 1 is a schematic structural diagram of a terminal device according to an embodiment of the present application, and fig. 2 is a schematic structural diagram of a part of a longitudinal section of the terminal device according to an embodiment of the present application. As shown in fig. 1 and 2, the terminal device may include: the display device comprises a frame 10, a display screen 20 arranged on one side of the frame in a covering manner, a rear cover 30 arranged on the other side of the frame in a covering manner, and an antenna 40 arranged between the display screen 20 and the rear cover 30.

The terminal device may further include a middle board (not shown) located in the accommodating space surrounded by the frame 10, the display screen 20 and the rear cover 30, where devices such as a circuit board and a battery may be disposed on the middle board, and various components such as a processor, a memory, a camera, a speaker, a receiver, a microphone, an indicator and a sensor may be disposed on the circuit board.

The frame 10 may include a left frame and a right frame which are disposed opposite to each other, and a top frame and a bottom frame connected between the left frame and the right frame; the frames are mutually connected to form a square frame structure, and a certain radian or chamfer angle can be formed at the connecting position. The frame 10 may be integrally formed with the rear cover 30, or may be integrally formed with the middle plate, or may be fixedly connected with the rear cover 30 and/or the middle plate by an assembly method.

The frame 10 may be a metal frame, such as copper, magnesium alloy, or stainless steel; or nonmetal frames such as plastic frames, glass frames, ceramic frames and the like; or may be a metal-to-nonmetal combined bezel.

When the bezel 10 includes a metal bezel, the metal bezel may be used as a radiator of the antenna 40. In a specific implementation, the metal frame may be broken into a plurality of metal branches by one or more slots, and some or all of these metal branches may be used as radiators of the antenna 40, thereby implementing structural multiplexing.

The display screen 20 is used for realizing the display function of the terminal equipment, and can be a curved screen or a non-curved screen; the display 20 may include a display panel and a cover plate attached to the display panel for protecting the display panel and receiving user operations. The display panel may employ a Liquid Crystal Display (LCD) CRYSTAL DISPLAY, an organic light-emitting diode (OLED), an active-matrix organic LIGHT EMITTING diode (AMOLED), a flexible light-emitting diode (FLED), a Mini LED, a Micro LED, a quantum dot LIGHT EMITTING diodes (QLED), or the like.

The rear cover 30 may be a metal rear cover, a glass rear cover, a ceramic rear cover, a plastic rear cover, or the like, and the material of the rear cover 30 is not particularly limited in the embodiment of the present application.

The antenna 40 may include one or more antennas 40 that may be used to transmit and receive low frequency signals, intermediate frequency signals, and/or high frequency signals. The antenna 40 may be located at or near any of the top, bottom, left and right frame regions of the terminal device, and fig. 2 illustrates an example in which the antenna 40 is located at the left frame region, and this positional relationship will be described later.

The antenna 40 may be implemented in the form of a flexible circuit board (Flexible Printed Circuit, FPC), a Laser-Direct-structuring (LDS) antenna, a metal device antenna (METAL DEVICE ANTENNA, MDA), a metal bezel, or the like, or the antenna 40 may be implemented in combination of at least two of the foregoing forms. The embodiment of the application is not particularly limited to the specific implementation form of the antenna. The MDA antenna is a low-cost antenna implementation that uses a metal structure such as an aluminum alloy embedded in a housing as an antenna radiator, where the antenna radiator is formed in a non-metal housing (such as a plastic frame), and in some embodiments, the MDA antenna is also referred to as a mode decorative antenna, an in-mold injection antenna, or other names.

Fig. 3 shows schematically an antenna structure implemented in combination with two forms, specifically a rear view of the antenna 40. As shown in fig. 3, the antenna 40 includes a first radiator 41 and a second radiator 42 in a bar shape, and one end of the first radiator 41 and one end of the second radiator 42 are coupled through a slit 43.

The antenna 40 may include two or more radiators, and the first radiator 41 and the second radiator 42 may be any two radiators, and for convenience of explanation, two radiators are exemplified in the embodiment of the present application.

The first radiator 41 may be grounded through a ground point 411 and connected to a feed source F through a feed point 412. It can be understood that the grounding point and the feeding point in the embodiment of the present application are not actually existing points, and taking the first radiator 41 as an example, the grounding position of the first radiator 41 is referred to as a grounding point, and the position of the first radiator 41 connected to the feed source F is referred to as a feeding point.

Each radiator of the antenna 40 may also be provided with a radiation branch according to requirements, so as to improve the radiation directivity, the working bandwidth, and other performances of the antenna 40. Illustratively, as shown in fig. 3, one end of the first radiator 41 may be connected to a radiating stub 44, and the radiating stub 44 may be grounded through a grounding point 441. In some embodiments, the first radiator 41 and the second radiator 42 may be implemented as metal rims, and the radiating stub 44 may be implemented as an FPC or an LDS.

The first radiator 41 may be connected to a first tuning circuit SW1, and one end of the first tuning circuit SW1 is connected to the first radiator 41, and the other end is grounded. The first tuning circuit SW1 may include a switch and a plurality of tuning elements, and the first radiator 41 may be connected to different tuning elements through the switch to change the resonant frequency of the first radiator 41, so that the first radiator 41 may be switched between different operating frequency bands according to actual needs, and further, the antenna 40 may cover more operating frequency bands.

The second radiator 42 may be connected to a second tuning circuit SW2, and one end of the second tuning circuit SW2 is connected to the second radiator 42, while the other end is grounded. The second tuning circuit SW2 may include a switch and a plurality of tuning elements, and the second radiator 42 may be connected to different tuning elements through the switch to adjust the resonant frequency of the second radiator 42, so that the second radiator 42 can be switched between different operating frequency bands according to actual needs, and further, the antenna 40 may cover more operating frequency bands.

Other branch structures and components may be disposed on the antenna 40, and the specific structure of the antenna 40 is not particularly limited in the embodiment of the present application.

For an antenna structure in which radiators are coupled through slots as described above, some antennas 40 require a higher coupling amount (coupling amount between the first radiator 41 and the second radiator 42) due to performance requirements. Wherein, the coupling amount of the antenna 40 is related to the gap width between the antenna radiators and the cross-sectional area of the radiators, wherein, the gap width is determined according to the structure production process, and has minimum gap requirement, and generally, the smaller the gap is, the greater the production difficulty is, and the higher the cost is; the cross-sectional area of the radiator is affected by the layout space of the antenna, and has a certain limit, and on the other hand, the radiator on two sides of the slot is generally subjected to chamfering treatment in the production process due to the demand of preventing shrinkage, so that the cross-sectional area of the radiator can be reduced. For these reasons, the terminal device is prone to insufficient antenna coupling during production.

In order to solve the above technical problem, as shown in fig. 4, a feasible solution is to change the circuit board, and add a coupling capacitance C 'between the first radiator 41 and the second radiator 42, so that the coupling capacitance C' is connected in parallel with the original distributed capacitance between the first radiator 41 and the second radiator 42, and the coupling capacitance between the first radiator 41 and the second radiator 42 is increased, so that the coupling quantity between the first radiator 41 and the second radiator 42 can be improved.

However, the scheme of the circuit board with the modified version has higher cost and longer period of modification and debugging.

For this reason, the embodiment of the present application provides another solution, which is described in detail below, to conveniently achieve the purpose of increasing the coupling amount of the antenna by providing a metal layer between the display screen 20 and the rear cover 30.

Fig. 5 shows a schematic diagram of the positional relationship between the antenna 40 and the metal layer 50, and continuing with the antenna structure shown in fig. 4, as shown in fig. 5, the metal layer 50 spans across both sides of the slot 43 and is indirectly coupled to the first radiator 41 and the second radiator 42, respectively. It is understood that indirect coupling is a concept that is opposed to direct coupling, i.e., spaced coupling, which is not a direct electrical connection therebetween.

The projection of the slit 43 onto the display screen 20 at least partially overlaps the projection of the metal layer 50 onto the display screen 20. That is, the projection of the slit 43 onto the display screen 20 may be entirely located in the projection area of the metal layer 50 onto the display screen 20, or may be partially located in the projection area of the metal layer 50 onto the display screen 20.

In particular, the metal layer 50 may be located between the antenna 40 and the display 20, or between the antenna 40 and the rear cover 30.

Taking the metal layer 50 as an example, as shown in fig. 6, an equivalent circuit schematic diagram of the antenna 40 and the metal layer 50 is shown, where fig. 6 is a schematic diagram of a side view of the antenna 40 and the metal layer 50.

The metal layer 50 is indirectly coupled to the first radiator 41 and the second radiator 42 on both sides of the slot 43, so that coupling capacitances C1 and C2 can be formed between the metal layer 50 and the first radiator 41 and the second radiator 42, respectively, and at this time, the coupling capacitances between the first radiator 41 and the second radiator 42 of the antenna 40 are: the equivalent series capacitance of C1 and C2 is greater than the coupling capacitance formed by the original slot 43 by the capacitance formed by the parallel connection of the coupling capacitance C of the original slot 43, so that the coupling capacitance between the radiators of the antenna 40 is greatly increased, and the coupling quantity of the antenna 40 can be effectively improved. In addition, the mode does not need to change the edition circuit board, has lower cost, is easy to realize and has short period.

In this embodiment, the size of the metal layer 50 may be determined according to the required increased coupling amount of the antenna 40, and if the required coupling amount is higher, a larger area of the metal layer 50 may be provided; if the amount of coupling required is low, a smaller area of the metal layer 50 may be provided. The length and width of the metal layer 50 may be determined based on the desired area or desired increased coupling and the amount of space adjacent the antenna 40.

In some embodiments, as shown in fig. 5, the length of the metal layer 50 in the first direction (the length direction of the slit 43) may be greater than or equal to the length of the slit 43 to shorten the length of the metal layer 50 in the second direction (the width direction of the slit 43).

The metal layer 50 may be implemented by using FPC or may be made of metal such as copper, silver, etc., and may be implemented by using a metal coating, that is, a metal coating may be disposed on a component near the antenna 40, so as to save space. In some embodiments, the metal layer 50 is a silver paste layer, the implementation is simple in process, and good in conductivity and stability. The metal layer 50 will be exemplified as a silver paste layer.

The specific location of the metal layer 50 may be determined according to the implementation manner of the first radiator 41 and the second radiator 42 in the antenna 40, and as mentioned above, the antenna 40 may be implemented in the form of MDA, a metal frame, FPC, LDS antenna, etc., and some possible implementation manners of the metal layer 50 are described below by taking these antenna forms as examples.

Fig. 7 shows a schematic position diagram of an antenna structure and a corresponding metal layer 50, where fig. 7 is a schematic partial cross-sectional view of a terminal device, and as shown in fig. 7, in the terminal device, a first radiator 41 and a second radiator 42 of an antenna 40 are implemented in MDA, a frame 10 is a non-metal frame, and the first radiator 41 and the second radiator 42 of the antenna 40 are formed in the frame 10 by in-mold injection.

For such an antenna structure, as an alternative implementation, the metal layer 50 may be disposed on a surface (a position P11 indicated by a bold line in fig. 7) of a non-display area of the display screen 20, which may be a part or all of an area of the cover plate of the display screen 20 protruding outside the display panel.

An insulating medium layer 60 is generally disposed between the non-display area of the display screen 20 and the frame 10, and the insulating medium layer 60 may be made of an adhesive or other material for achieving the functions of adhesion, sealing, buffering, etc.

As an alternative implementation, the metal layer 50 may also be disposed on the side of the dielectric layer 60 facing the antenna 40 (the position P12 indicated by the bold line in fig. 7), which is closer to the antenna 40, with a relatively larger coupling, and this implementation is less affected by assembly tolerances, with an increased coupling of the antenna more conforming to design requirements.

As yet another alternative implementation, a portion of the metal layer 50 may be disposed at the position P12, and another portion may be disposed at the position P11, so that when the area of the metal layer 50 at the position P12 is smaller, the metal layer 50 at the position P11 may be supplemented to increase the antenna coupling amount.

In this embodiment, the display 20 may be a non-curved screen or a curved screen, and fig. 7 illustrates a curved screen as an example. When the display 20 is a curved surface, the cover plate of the display 20 is bent toward the frame 10, and at this time, the non-display area of the display 20 further includes at least a portion of the end surface area of the edge of the display 20, that is, as shown in fig. 7, the position P11 may include at least a portion of the end surface area of the edge of the display 20, and the position P12 may include a surface of the insulating medium layer 60 on the portion of the end surface area facing the antenna 40.

Fig. 8 shows a schematic diagram of the position of another antenna structure and the corresponding metal layer 50, where fig. 8 is a schematic diagram of a partial cross section of the terminal device, and the main difference between fig. 8 and the terminal device shown in fig. 7 is that in fig. 8, the frame 10 is a metal frame, and the first radiator 41 and the second radiator 42 of the antenna 40 are implemented by using metal frames, that is, a part of the metal frame forms the first radiator 41, and a part of the metal frame forms the second radiator 42.

For such an antenna structure, the metal layer 50 may be disposed on the surface of the non-display area of the display screen 20 (the position P21 indicated by the bold line shown in fig. 8).

Similar to the embodiment shown in fig. 7, the display 20 may be a non-curved screen or a curved screen. When the display screen 20 is a curved screen, the non-display area of the display screen 20 also includes at least a partial end surface area of the edge of the display screen 20, i.e., as shown in fig. 8, the position P21 may include at least a partial end surface area of the edge of the display screen 20.

Fig. 9 shows a schematic position of a further antenna structure and a corresponding metal layer 50, wherein fig. 9 is a schematic partial cross-sectional view of a terminal device, and as shown in fig. 9, in the terminal device, the first radiator 41 and the second radiator 42 of the antenna 40 are implemented in the form of FPCs or LDS, and the frame 10 is a non-metal frame.

A side of the frame 10 near the rear cover 30 extends into the terminal device to form a connecting arm 71 for connecting with related internal structures (such as an antenna fixing structure, etc.); the side of the bezel 10 adjacent to the display screen 20 is provided with a bracket 72 for supporting surrounding structures such as the bezel 10, the connection arm 71, the antenna 40, the circuit board, etc. The antenna 40 is disposed between the bracket 72 and the connection arm 71.

For such an antenna structure, as an alternative implementation, the metal layer 50 may be disposed on a side of the connection arm 71 facing away from the antenna 40 (a position P31 indicated by a bold line in fig. 9) or on a side of the support 72 facing away from the antenna 40 (a position P32 indicated by a bold line in fig. 9).

An insulating dielectric layer 73 is generally disposed between the antenna 40 and the support 72, and the insulating dielectric layer 73 may be made of a material such as an adhesive for achieving the functions of adhesion, buffering, etc.

As another alternative, the metal layer 50 may also be disposed between the insulating medium layer 73 and the support 72 (the position P33 indicated by the bold line in fig. 9), wherein the metal layer 50 may be disposed on the insulating medium layer 73 or on the support 72. In this implementation, the metal layer 50 is closer to the antenna 40, so that the amount of coupling can be increased more effectively.

As yet another alternative implementation, the metal layer 50 may also be disposed at multiple ones of the above-described locations P31, P32, and P33 to meet higher coupling requirements.

In some embodiments, the antenna 40 may also be disposed between the rear cover 30 and the connection arm 71, and for such a configuration, the metal layer 50 may be disposed between the connection arm 71 and the bracket 72 or on a side of the bracket 72 facing away from the antenna 40. In some embodiments, the support 72 and the frame 10 may be integrally formed, and for such a structure, the metal layer 50 may be disposed on a side of the support 72 facing away from the antenna 40.

As described above, the metal layer 50 may increase the coupling amount of the antenna 40, and thus may improve the antenna performance. In the following, the antenna structure shown in fig. 3 is taken as an example, and the antenna simulation effect before and after the metal layer 50 is added is described, where the antenna 40 is located at the left frame position of the terminal device, and the operating frequency band of the antenna 40 is described as a long term evolution (long term evolution, LTE) B3 frequency band.

Referring to fig. 10, in order to increase the performance simulation effect of the antenna 40 before and after the metal layer 50, wherein the o_radiation efficiency represents the radiation efficiency performance simulation curve of the antenna 40 before the metal layer 50 is increased, and the o_total efficiency represents the antenna total efficiency performance simulation curve of the antenna 40 before the metal layer 50 is increased; the m_radiation efficiency represents a radiation efficiency performance simulation curve of the antenna 40 after the metal layer 50 is added, and the m_total efficiency represents an antenna total efficiency performance simulation curve of the antenna 40 after the metal layer 50 is added.

As shown in FIG. 10, at 1.7261GHz frequency, the O_radiation efficiency was-3.9 decibels (dB), the O_total efficiency was-4.5 dB, the M_radiation efficiency was-3.4 dB, and the M_total efficiency was-4.2 dB. After the metal layer 50 is added, the radiation efficiency of the antenna 40 is improved by about 0.5dB at 1.7261GHz frequency, and the total efficiency of the antenna is also improved by about 0.3 dB.

In this embodiment, by providing the metal layer 50, the coupling amount between the first radiator 41 and the second radiator 42 of the antenna 40 is increased, and the current on the first radiator 41 can be more easily coupled to the second radiator 42, and the current is dispersed, so that the electromagnetic wave absorption ratio (specific absorption rate, SAR) of the antenna 40 can be reduced.

The following table shows SAR values at different frequencies for different sides of the antenna 40 before and after adding the metal layer 50, where SAR refers to the electromagnetic power absorbed by a unit mass of human tissue in W/kg. The SAR value is used for measuring the radiation heat effect of the electronic equipment, body 0mm represents the SAR value when the terminal equipment contacts the Body, and 10g represents that the biological tissue fluid is tested according to the standard of 10g unit volume (equivalent to 10cm ³); left represents the scene of the left side of the terminal device contacting the body, and back represents the scene of the back side of the terminal device contacting the body.

As can be seen from the above table, after adding the metal layer 50, the SAR value of the terminal device is reduced in the left scenario and the back scenario under the conditions that the operating frequency of the antenna 40 is 1.71GHz, 1.747GHz and 1.783GHz, respectively. Based on the test result, it can be determined that the terminal device can obtain SAR income of about 0.5 dB.

As can be seen from the above, in the terminal device provided in this embodiment, by disposing the metal layers that are respectively and indirectly coupled to the first radiator and the second radiator of the antenna near the antenna, the coupling capacitance between the radiators of the antenna can be increased, so that the coupling amount of the antenna can be effectively improved. In addition, the mode does not need to change the edition circuit board, has lower cost, is easy to realize and has short period. Moreover, after the coupling quantity of the antenna is increased, the current on the first radiator is more easily coupled to the second radiator, and the current is dispersed, so that the SAR value of the antenna can be reduced.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.

It should be understood that in the description of the application and the claims that follow, the terms "comprising," "including," "having," and any variations thereof are intended to cover a non-exclusive inclusion, which is meant to be "including but not limited to," unless otherwise specifically emphasized. For example, a process, method, system, article, or apparatus that comprises a list of steps or modules is not necessarily limited to those steps or modules explicitly recited, but may include other steps or modules not expressly listed or inherent to such process, method, article, or apparatus.

In the description of the present application, unless otherwise indicated, "/" means that the objects associated in tandem are in a "or" relationship, e.g., A/B may represent A or B; in the present application, "and/or" describing the association relationship of the association object, it means that there may be three relationships, for example, a and/or B may mean: a alone, a and B together, and B alone, wherein A, B may be singular or plural.

Also, in the description of the present application, the terms "first," "second," and the like are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order, and are not to be construed as indicating or implying a relative importance or an implicit indication of the number of technical features indicated. It is to be understood that the data so used may be interchanged where appropriate, such that the embodiments described herein may be implemented in other sequences than those illustrated or otherwise described herein; features defining "first", "second" may include at least one such feature, either explicitly or implicitly.

In embodiments of the application, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

In addition, in the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

In addition, in the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "coupled," and the like are to be construed broadly and may be, for example, fixedly attached, detachably attached, or integrally attached; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. Unless otherwise specifically defined, it will be apparent to one of ordinary skill in the art that the specific meaning of the terms described above in this application will be understood in the light of the specific circumstances.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Claims (10)

1. A terminal device, comprising: the display device comprises a frame, a display screen, a rear cover, an antenna and a metal layer, wherein the display screen is covered on one side of the frame, the rear cover is covered on the other side of the frame, and the antenna and the metal layer are positioned between the display screen and the rear cover;

The antenna comprises a first radiator and a second radiator, wherein one end of the first radiator and one end of the second radiator are coupled through a gap;

the metal layer is respectively and indirectly coupled with the first radiator and the second radiator;

The projection of the slit on the display screen at least partially overlaps with the projection of the metal layer on the display screen.

2. The terminal device of claim 1, wherein the bezel comprises a metal bezel, a portion of the metal bezel forms the first radiator, a portion of the metal bezel forms the second radiator, and the metal layer is disposed on a surface of the non-display area of the display screen.

3. The terminal device of claim 1, wherein the bezel comprises a non-metallic bezel, the first radiator and the second radiator are formed in the non-metallic bezel, an insulating dielectric layer is provided between a non-display area of the display screen and the bezel, and the metal layer is disposed on a side of the insulating dielectric layer facing the antenna.

4. A terminal device according to claim 3, wherein part of the metal layer is provided on a side of the insulating medium layer facing the antenna, and the other part of the metal layer is provided on a surface of the non-display area of the display screen.

5. The terminal device of any of claims 2-4, wherein the display screen is a curved screen and the non-display area of the display screen comprises at least a portion of an end surface area of an edge of the curved screen.

6. The terminal device according to claim 1, wherein a side of the frame, which is close to the rear cover, extends inwards to form a connecting arm, a bracket is arranged on a side of the frame, which is close to the display screen, the antenna is arranged between the bracket and the connecting arm, and an insulating medium layer is arranged between the antenna and the bracket;

the metal layer is disposed in at least one of the following locations: the insulating medium layer is arranged between the support and the connecting arm, one surface of the connecting arm, which is away from the antenna, and one surface of the support, which is away from the antenna.

7. The terminal device of claim 1, wherein an end of the bezel adjacent the rear cover extends inwardly to form a connection arm, the antenna being disposed between the rear cover and the connection arm; the metal layer is arranged on one surface of the connecting arm, which is opposite to the antenna.

8. Terminal device according to claim 6 or 7, characterized in that the first and the second radiator are realized in the form of an FPC or an LDS.

9. The terminal device according to any of claims 1-8, wherein the metal layer is a silver paste layer, a metal coating or an FPC.

10. The terminal device according to any of claims 1-9, wherein the length of the metal layer in a first direction is greater than or equal to the length of the slit, the first direction being the length direction of the slit.