CN110518334B - Mobile terminal - Google Patents
Mobile terminal Download PDFInfo
- Publication number
- CN110518334B CN110518334B CN201910788371.3A CN201910788371A CN110518334B CN 110518334 B CN110518334 B CN 110518334B CN 201910788371 A CN201910788371 A CN 201910788371A CN 110518334 B CN110518334 B CN 110518334B
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- CN
- China
- Prior art keywords
- antenna unit
- antenna
- telescopic assembly
- mobile terminal
- housing
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
- H01Q1/244—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas extendable from a housing along a given path
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/29—Combinations of different interacting antenna units for giving a desired directional characteristic
- H01Q21/293—Combinations of different interacting antenna units for giving a desired directional characteristic one unit or more being an array of identical aerial elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Support Of Aerials (AREA)
- Telephone Set Structure (AREA)
Abstract
The present invention provides a mobile terminal, comprising: the antenna comprises a shell, a first telescopic assembly, a first antenna unit and a second antenna unit, wherein the first antenna unit is arranged on the shell; the second antenna unit is arranged on the first telescopic component, and the second antenna unit and the first antenna unit form a first antenna array; the first telescopic assembly is movably connected with the shell and can move between a first position and a second position so as to change the distance between the first antenna unit and the second antenna unit. The embodiment of the invention improves the performance of the antenna array.
Description
Technical Field
The invention relates to the technical field of communication equipment, in particular to a mobile terminal.
Background
The fifth generation mobile communication technology (5G) can provide higher communication speed, lower latency, and a larger number of simultaneous connections than the previous generation technologies. Among them, the millimeter wave communication technology with a frequency band above 20GHz is one of the key technologies in the 5G technology because of having a very wide communication bandwidth. Since the millimeter wave band is divided into 5G bands in many countries and regions in the world, various electronic products, particularly mobile communication terminals such as mobile phones, equipped with millimeter wave antenna modules will be increasing in the future.
Due to the large propagation loss and reflection loss of millimeter waves in space, the millimeter wave communication technology standard in the 5G technology stipulates that a millimeter wave antenna should have a gain above a certain degree to compensate for various losses in a spatial link. This requires the millimeter wave antenna to be in the form of an antenna array, and to realize phased array beam forming by controlling the phase difference between the sub-antennas in the array, so that the synthesized beam has higher gain.
At present, a plurality of 5G millimeter wave frequency bands cover 24.25-29.5 GHz and 37-40 GHz, and the difference of the optimal spacing of the array units is large due to the frequency difference of each frequency band and even each channel of the same frequency band. In the prior art, the millimeter wave antenna array of the mobile terminal is designed to have a certain fixed distance, which results in poor performance of the antenna array.
Disclosure of Invention
Embodiments of the present invention provide a mobile terminal to solve the problem that the performance of an antenna array is poor due to the constant distance between each antenna unit in the antenna array.
An embodiment of the present invention provides a mobile terminal, including: a housing, a first telescoping assembly, a first antenna element, and a second antenna element, wherein,
the first antenna unit is arranged on the shell;
the second antenna unit is arranged on the first telescopic component, and the second antenna unit and the first antenna unit form a first antenna array;
the first telescopic assembly is movably connected with the shell and can move between a first position and a second position so as to change the distance between the first antenna unit and the second antenna unit.
According to the embodiment of the invention, the first antenna unit is arranged on the shell, and the second antenna unit is arranged on the first telescopic assembly, so that the distance between the first antenna unit and the second antenna unit can be changed, the first antenna array formed by the first antenna unit and the second antenna unit can always keep the optimal distance in different antenna working frequency bands, and the problem of poor performance of the antenna array caused by the fact that the distance between each antenna unit in the antenna array is fixed is solved. Therefore, the embodiment of the invention improves the performance of the antenna array.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is one of the structural diagrams of a mobile terminal according to an embodiment of the present invention;
fig. 2 is a second block diagram of a mobile terminal according to an embodiment of the present invention;
fig. 3 is a third block diagram of a mobile terminal according to an embodiment of the present invention;
fig. 4 is a fourth structural diagram of a mobile terminal according to an embodiment of the present invention;
fig. 5 is a fifth structural diagram of a mobile terminal according to an embodiment of the present invention;
fig. 6 is a sixth structural diagram of a mobile terminal according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.
Referring to fig. 1, an embodiment of the present invention provides a mobile terminal, where the mobile terminal includes: a housing 11, a first telescoping assembly 12, a first antenna element 13, and a second antenna element 14, wherein,
the first antenna unit 13 is arranged on the shell 11;
the second antenna unit 14 is disposed on the first telescopic assembly 12, and the second antenna unit 14 and the first antenna unit 13 form a first antenna array;
the first telescopic assembly 12 is movably connected to the housing 11 and is movable between a first position and a second position to change a distance between the first antenna unit 13 and the second antenna unit 14.
To better illustrate a specific implementation manner of the embodiment of the present invention, a three-axis coordinate system as shown in fig. 1 is established, in the y-axis direction, the upper end is the top end of the housing 11, and the lower end is the bottom end of the housing 11; the z-axis is the thickness direction of the housing.
The housing 11 may be provided with an opening adapted to receive the first retraction assembly 12. in an alternative embodiment, the first retraction assembly 12 may be manually controlled to move between the first position and the second position; in an alternative embodiment, a drive member may be provided within housing 11, whereby first retraction assembly 12 is driven from the first position to the second position, and whereby manual or drive control of first retraction assembly 12 from the second position back to the first position is provided. The driving component may be a motor, an electromagnet, or an elastic component, and the specific structure may refer to the related art, which is not further limited herein.
In the embodiment of the present invention, preferably, the first telescopic assembly 12 is driven by a driving member, and the driving member can control the first telescopic assembly 12 to stay at any position between the first position and the second position.
Specifically, different optimal antenna element spacings g1, g2 · gn are designed for the multiple frequency bands and channels that the antenna array can support. When the antenna works in different frequency bands and channels, the first telescopic assembly is controlled to be located at different positions through the driving part so as to change the distance between the first antenna unit 13 and the second antenna unit 14. As shown in fig. 1-3, corresponding to three different spacings g1, g2, and g 3.
It should be noted that, the corresponding relationship between the antenna unit distance and the operating frequency band and channel of the antenna may be stored in the mobile terminal, and the driving component may determine the distance between the antenna units according to the operating frequency band and channel of the antenna, so as to drive the first telescopic assembly 12 to move, so that the distance between the first antenna unit 13 and the second antenna unit 14 meets the requirement.
In the embodiment of the present invention, the first antenna unit 13 is disposed on the housing 11, and the second antenna unit 14 is disposed on the first telescopic assembly 12, so that the distance between the first antenna unit 13 and the second antenna unit 14 can be changed, and thus, the first antenna array formed by the first antenna unit 13 and the second antenna unit 14 can always keep the optimal distance in different antenna operating frequency bands, and the problem of poor performance of the antenna array caused by the fixed distance between each antenna unit in the antenna array is solved. Therefore, the embodiment of the invention improves the performance of the antenna array.
Optionally, in an embodiment, a screen cover 111 is disposed on the housing 11, and the first antenna unit 13 is located below the screen cover 111.
The screen cover 111 is usually a glass cover, but other transparent non-metallic materials may be used in practical applications.
The first antenna element 13 is located at the top edge of the screen cover 111. In this embodiment, the first antenna unit 13 located at the top edge of the screen cover 111 can be understood as: one side of the first antenna unit 13 close to the top edge of the screen cover 111 may coincide with the top edge of the screen cover 111, or may be parallel to the top edge of the screen cover 111 and spaced by a certain distance, and the size of the distance may be set according to actual needs, which is not further limited herein.
Specifically, the position of the first antenna unit 13 may be set according to actual needs, for example, in the embodiment of the present invention, the housing 11 is provided with a second antenna unit 14, and the first antenna unit 13 is located below the second antenna unit 14.
Further, a display module is disposed on the housing 11, and the display module is disposed below the second antenna unit 14. The first antenna unit 13 and the display module may be disposed in parallel, that is, the first antenna unit 13 is located at one side of the display module.
It should be understood that, in the embodiment of the present invention, a surface of the second antenna unit 14, which is provided for a user to touch, may be defined as an upper surface of the second antenna unit 14, and the fact that the first antenna unit 13 is located below the second antenna unit 14 means that the first antenna unit is disposed on a side of the second antenna unit 14 away from the upper surface. Specifically, the first antenna element 13 may be disposed on the antenna substrate, and the first antenna element is disposed toward the second antenna element 14. For example, the first antenna element 13 may be attached to the second antenna element 14, or may be spaced apart from each other by a small distance. And are not further limited herein. Since the first antenna element 13 is disposed below the second antenna element 14, space for other antennas is not occupied.
Further, the position of the first antenna element 13 may be set according to actual requirements, for example, in the embodiment of the present invention, the first antenna element 13 is disposed near the top edge of the second antenna element 14. That is, the first antenna element 13 is disposed below the outer side of the second antenna element 14, does not interfere with the ITO lines on the side and bottom of the screen, and is not easily affected by the ITO lines. In addition, when a user holds the mobile terminal, the mobile terminal is not easy to be shielded by the user, and the space coverage rate of the first antenna array is improved.
In an embodiment of the present invention, as shown in fig. 1, the first telescopic assembly 12 may be disposed on a top portion of the housing 11 and may be movable in a first direction and a direction opposite to the first direction. The first direction may be the + y direction.
In another embodiment of the present invention, the first telescopic assembly 12 may be disposed at a side portion of the housing 11 and may be movable in a second direction and a direction opposite to the second direction. The second direction may be the + x direction.
Further, in an optional embodiment, when the first telescopic assembly 12 is located at the first position, the second antenna unit 14 is hidden in the housing 11; when the first retractable assembly 12 is in the second position, the second antenna unit 14 extends out of the housing.
In an embodiment of the present invention, the second antenna unit 14 may be disposed on a side of the first telescopic assembly 12 facing the second antenna unit 14. When the first antenna array is not operated in the beamforming and scanning state (i.e. the second antenna unit 14 is not needed), the second antenna unit 14 is hidden in the housing 11 by controlling the first telescopic assembly 12 to move to the first position. Thus, when the second antenna unit 14 is not used, the second antenna unit 14 is prevented from being damaged due to contact with the outside, and the service life of the second antenna unit 14 can be prolonged.
It should be noted that, in the embodiment of the present invention, the first antenna unit 13 and the second antenna unit 14 are sequentially arranged in the moving direction of the first telescopic assembly 12. As shown in fig. 1, the linear direction of the first antenna array is parallel to the y-axis, i.e. the line connecting the first antenna element 13 and the second antenna element 14 is parallel to the y-axis. As shown in fig. 4, the linear direction of the first antenna array is parallel to the x-axis, i.e. the line connecting the first antenna element 13 and the second antenna element 14 is parallel to the x-axis.
It should be noted that the number of the first antenna elements 13 and the second antenna elements 14 may be set according to actual needs. In an alternative embodiment, the number of the first antenna unit 13 and the second antenna unit 14 may be 1.
Since the first antenna unit 13 and the second antenna unit 14 are set to be 1, the antenna performance improvement effect on the first antenna array is better when the distance between the first antenna unit 13 and the second antenna unit 14 is adjusted.
Further, as shown in fig. 5, based on the above embodiment, in an optional embodiment, a second telescopic assembly 121 is further disposed on the first telescopic assembly 12, a third antenna unit 122 is disposed on the second telescopic assembly 121, and the third antenna unit 122, the second antenna unit 14, and the first antenna unit 13 form the first antenna array; the second telescopic assembly 121 is movably connected to the first telescopic assembly 12 and can move relative to the first telescopic assembly 12 to change the distance between the third antenna unit 122 and the second antenna unit 14.
In the embodiment of the present invention, the third antenna unit 122, the second antenna unit 14, and the first antenna unit 13 are disposed on the same straight line, and when in use, an interval between the third antenna unit 122 and the second antenna unit 14 may be set to be equal to an interval between the second antenna unit 14 and the first antenna unit 13. Therefore, the distance between the antenna units can be ensured to be the optimal distance of the working frequency band of the antenna, and the performance of the antenna is improved.
The specific connection mode between the second telescopic assembly 121 and the first telescopic assembly 12 can be set according to actual needs. As shown in fig. 5, in this embodiment, a sliding groove may be formed by recessing the surface where the second antenna unit 14 is disposed, and the sliding groove penetrates through the end surface of the first telescopic assembly 12 away from the housing 11. The second telescopic assembly 121 can be accommodated in the chute and move in the vertical direction along the chute.
It should be understood that the second telescopic assembly 121 may be controlled to move manually or by a driving component, and the specific control manner may refer to the description of the first telescopic assembly 12, which is not described herein again.
Further, as shown in fig. 6, based on the foregoing embodiment, in another optional embodiment, the mobile terminal further includes a third telescopic assembly 15, where the third telescopic assembly 15 is provided with a fourth antenna unit 16, and the fourth antenna unit 16 and the first antenna unit 13 form a second antenna array; the third telescopic assembly 15 is movably connected to the housing 11 and is movable between a third position and a fourth position to change the distance between the first antenna unit 13 and the fourth antenna unit 16.
In an embodiment of the present invention, the first antenna array may perform beam scanning in a scanning plane to search and align with a base station; the second antenna array may perform beam scanning in another scan plane to search for and aim at the base station. Therefore, two-dimensional beam scanning can be realized, and the coverage area of beam scanning is improved.
Specifically, the positions of the first telescopic assembly 12 and the third telescopic assembly 15 may be set according to actual needs, as shown in fig. 6, in an embodiment of the present invention, the first telescopic assembly 12 is disposed at the top of the housing 11, and the third telescopic assembly 15 is disposed at a side of the housing 11.
Further, the relationship between the scanning plane of the first antenna array and the scanning plane of the second antenna array may be set according to actual situations, as shown in fig. 6, in the embodiment of the present invention, a connection line between the first antenna unit 13 and the second antenna unit 14 may be set to be perpendicular to a connection line between the first antenna unit 13 and the fourth antenna unit 16. That is, the scanning plane of the first antenna array is perpendicular to the scanning plane of the second antenna array.
In fig. 6, a plane scanned by the first antenna array formed by the first antenna element 13 and the second antenna element 14 is a z-y plane, and a plane scanned by the second antenna array formed by the first antenna element 13 and the fourth antenna element 16 is a z-x plane.
In the embodiment of the present invention, when performing beam forming and scanning, the second antenna unit 14 and the fourth antenna unit 16 may be controlled to alternately operate, so as to implement beam scanning alternately on the z-y plane and the z-x plane.
It should be understood that the third telescopic assembly 15 may be controlled to move between the third position and the fourth position by a manual operation or a driving component, and the specific control manner may refer to the description of the first telescopic assembly 12 and will not be described herein.
Further, still be equipped with camera module 17 on above-mentioned first flexible subassembly 12, flexible subassembly is located during the first position, camera module 17 hide in casing 11, first flexible subassembly 12 is located during the second position, camera module 17 stretches out casing 11.
In an embodiment of the present invention, the camera module 17 may include a front camera and/or a rear camera. As shown in fig. 1, the lens of the camera module 17 and the second antenna unit 14 are located on the same side of the first telescopic assembly 12, and in this embodiment, the camera module 17 is a front camera for capturing an image of an area above a screen.
Specifically, when the camera is used and beam scanning is not performed, the first telescopic assembly 12 can be controlled to partially extend out, and the requirements of photographing or recording are met.
In the first antenna element 13, the second antenna element 14, the third antenna element 122, and the fourth antenna element 16, each antenna element may be a microstrip antenna, and may be, for example, a square microstrip antenna or a circular microstrip antenna. In other embodiments, other antenna forms with similar antenna characteristics are also possible.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A mobile terminal, comprising: a housing, a first telescoping assembly, a first antenna element, and a second antenna element, wherein,
the first antenna unit is arranged on the shell;
the second antenna unit is arranged on the first telescopic component, and the second antenna unit and the first antenna unit form a first antenna array;
the first telescopic assembly is movably connected with the shell and can move between a first position and a second position so as to change the distance between the first antenna unit and the second antenna unit;
the mobile terminal further comprises a third telescopic assembly, a fourth antenna unit is arranged on the third telescopic assembly, and the fourth antenna unit and the first antenna unit form a second antenna array; the third telescopic assembly is movably connected with the shell and can move between a third position and a fourth position so as to change the distance between the first antenna unit and the fourth antenna unit; and the connecting line of the first antenna unit and the second antenna unit is vertical to the connecting line of the first antenna unit and the fourth antenna unit.
2. The mobile terminal of claim 1, wherein a screen cover is disposed on the housing, and the first antenna unit is located below the screen cover.
3. The mobile terminal of claim 2, wherein the first antenna element is located at a top edge of the screen cover.
4. The mobile terminal of claim 1, wherein the first retractable assembly is disposed at a top of the housing and is movable in a first direction or a direction opposite to the first direction;
or the first telescopic assembly is arranged on the side part of the shell and can move in the second direction or the direction opposite to the second direction.
5. The mobile terminal of claim 1, wherein the second antenna unit is hidden within the housing when the first retractable assembly is in the first position; when the first telescopic assembly is located at the second position, the second antenna unit extends out of the shell.
6. The mobile terminal of claim 1, wherein the first antenna unit and the second antenna unit are sequentially arranged in a moving direction of the first telescopic assembly.
7. The mobile terminal according to claim 1, wherein a second telescopic assembly is further disposed on the first telescopic assembly, a third antenna unit is disposed on the second telescopic assembly, and the third antenna unit, the second antenna unit and the first antenna unit form the first antenna array; the second telescopic component is movably connected with the first telescopic component and can move relative to the first telescopic component so as to change the distance between the third antenna unit and the second antenna unit.
8. The mobile terminal according to any one of claims 1 to 7, wherein a camera module is further disposed on the first telescopic assembly, and when the first telescopic assembly is located at the first position, the camera module is hidden in the housing, and when the first telescopic assembly is located at the second position, the camera module extends out of the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910788371.3A CN110518334B (en) | 2019-08-26 | 2019-08-26 | Mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910788371.3A CN110518334B (en) | 2019-08-26 | 2019-08-26 | Mobile terminal |
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| CN110518334A CN110518334A (en) | 2019-11-29 |
| CN110518334B true CN110518334B (en) | 2021-07-23 |
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| CN201910788371.3A Active CN110518334B (en) | 2019-08-26 | 2019-08-26 | Mobile terminal |
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| CN101752673A (en) * | 2008-12-11 | 2010-06-23 | 宏达国际电子股份有限公司 | Mobile electronic device |
| CN106887667A (en) * | 2017-04-26 | 2017-06-23 | 青岛海信移动通信技术股份有限公司 | A kind of antenna and mobile terminal |
| WO2018060663A1 (en) * | 2016-09-27 | 2018-04-05 | ZoneArt Networks Ltd. | Antenna array |
| CN208939132U (en) * | 2018-11-05 | 2019-06-04 | 维沃移动通信有限公司 | Mobile terminal |
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| WO2007018146A1 (en) * | 2005-08-05 | 2007-02-15 | Matsushita Electric Industrial Co., Ltd. | Portable terminal device |
| US7755547B2 (en) * | 2006-06-30 | 2010-07-13 | Nokia Corporation | Mechanically tunable antenna for communication devices |
| KR101054286B1 (en) * | 2008-06-05 | 2011-08-08 | 삼성전자주식회사 | Antenna assembly of mobile terminal |
| CN104866893B (en) * | 2015-06-11 | 2016-03-23 | 易寒 | Coupling capacitance RFID label tag |
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| CN101752673A (en) * | 2008-12-11 | 2010-06-23 | 宏达国际电子股份有限公司 | Mobile electronic device |
| WO2018060663A1 (en) * | 2016-09-27 | 2018-04-05 | ZoneArt Networks Ltd. | Antenna array |
| CN106887667A (en) * | 2017-04-26 | 2017-06-23 | 青岛海信移动通信技术股份有限公司 | A kind of antenna and mobile terminal |
| CN208939132U (en) * | 2018-11-05 | 2019-06-04 | 维沃移动通信有限公司 | Mobile terminal |
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| CN110518334A (en) | 2019-11-29 |
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