CN101728630A - Electronic communication equipment and manufacturing process thereof - Google Patents
Electronic communication equipment and manufacturing process thereof Download PDFInfo
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- CN101728630A CN101728630A CN200910189159A CN200910189159A CN101728630A CN 101728630 A CN101728630 A CN 101728630A CN 200910189159 A CN200910189159 A CN 200910189159A CN 200910189159 A CN200910189159 A CN 200910189159A CN 101728630 A CN101728630 A CN 101728630A
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Abstract
The invention provides electronic communication equipment applying an antenna module and a manufacturing process thereof. The electronic communication equipment applying the antenna module comprises a communication module, a shell provided with an accommodating space and an antenna module, wherein the communication module is accommodated in the accommodating space of the shell; the antenna module is correspondingly and electrically connected with the communication module; and the antenna module and the shell are formed on the outer surface of the shell by adopting a direct laser forming method. The electronic communication equipment applying the antenna module has stable response frequency, small integral volume and convenient installation. The manufacturing process of the electronic communication equipment has low production cost and high production efficiency. Meanwhile, the invention also provides a mobile phone applying the antenna module.
Description
Technical field
The invention relates to a kind of electronic communication equipment and manufacturing process thereof, particularly a kind of electronic communication equipment and manufacturing process thereof of using antenna modules.
Background technology
Along with making rapid progress of the hyundai electronics communication technology, requirement for various electronic communication equipment is also more and more higher, mobile communication aspect particularly, as mobile phone, PDA etc., requirement can be under the prerequisite that does not reduce its usefulness especially, advance towards light, thin, short, little target as far as possible, in the hope of satisfying more high-quality consumption demand.
Single with regard to mobile phone, a ring most important in its design promptly is the design of antenna, because whether the quality of Antenna Design directly determines key factors such as the quality, moulding, size of electronic communication equipment.General common antenna is broadly divided into external and built-in two kinds: the external antenna package contains one pole type antenna (monopole antenna) and helical antenna (helix antenna) etc.; Built-in antenna then comprise planar inverted F-shape antenna (planar inverted F antenna, PIFA) and microstrip type antenna (microstripantenna) etc.
Consult Fig. 1, be and the schematic perspective view of the more approaching a kind of mobile phone of the present invention with antenna modules.Described antenna modules 1 comprises one first tabular antenna 11, one second tabular antenna 13, and the two is provided with at interval by a passage 12.The described first tabular antenna 11 is in order to the response low frequency signal, and appropriate location is provided with a low frequency earth point 111 and a low frequency signal load point 113 on it.The described second tabular antenna 13 is in order to the response high-frequency signal, and it is provided with a high frequency earthing point 131 and a high-frequency signal load point 133.Described signal feed-in point the 113, the 133rd is in order to the radio circuit of the printed circuit board (PCB) (figure does not show) that connects mobile phone, so that electromagnetic transmitting-receiving to be provided.And described earth point the 111, the 131st forms a loop in order to the described first tabular antenna 11, the second tabular antenna 13 and a ground plane 15 are electrically connected.
Electromagnetic frequency is to be inversely proportional to its wavelength, and because the area of the described first tabular antenna 11 is bigger, so its equivalent antenna length is longer, so the first tabular antenna 11 is the signal transmitting and receivings that are suitable for 900MHz.Equally, the second tabular antenna 13 is the signal transmitting and receivings that are applicable to 1800Mhz.And general in the connection of signal feed-in point, often be to realize with conducting terminal.When antenna module 1 is assembled in the mobile phone, conducting terminal is connected be fixed on respective signal load point 113,133 and the earth point 111,131.
In above-mentioned antenna modules 1, described tabular antenna 11,13 is fitted together by the hot melt post by plastic cement antenna holder and metal clips, and wherein metal clips is a kind of in the metal radiation fin.
But in practical application and manufacturing process, also there is following shortcoming in above-mentioned antenna modules 1:
The first, response band instability:, make mobile phone in the scope of its resonance frequency, to operate when the radio circuit of mobile phone inside resonance by inductance in the circuit and electric capacity.The metal clips area that experimental results show that tabular antenna 11,13 is big more, and its performance is good more.Though antenna can be set at all-wave length, half-wavelength or the quarter-wave that receives frequency of operation, but short and small design requirement because of mobile phone, the design area of tabular antenna 11,13 is minimum, then its frequency range that provides is then more limited, HFS particularly, the frequency range that it provided is too small so that can't effectively produce the desirable strength of resonance when 1900MHz.
Second, volume is excessive: above-mentioned antenna modules 1 need possess independently tabular antenna 11,13 and corresponding conducting terminal, die and to account for the certain height space and expend more materials and parts, mobile phone inner space and overall volume size with respect to its installation also need be bigger, and this kind design runs counter to the compactization trend of electronic communication equipment.
In addition,, increase its frequency range, certainly will need to increase the area of tabular antenna 11,13, run counter to the compact design concept of mobile phone equally for making the opereating specification of described antenna modules 1 contain to 1900MHz.
The 3rd, elasticity lack to be installed: when tabular antenna 11,13 and other element are installed in the housing of solid shape, can't be out of shape or deflection in the inner mounting condition of mobile phone with it, so make mobile phone need cooperate the shell dimension profile to reserve particular space, and can't do the configuration using of most economical efficient with regard to its whole interior space.
The 4th, the production cost height, production efficiency is low: need out two molds to make antenna holder and metal clips respectively in manufacture process, cost is higher.Also need fuse machine that two parts are assembled, production efficiency is low, and the bad control of hot melting process, hot melting temperature is not adjusted and is worked as or hot melt tool instability, causes antenna holder to lose efficacy easily, and operating personnel are unskilled, also cause the shell fragment distortion easily, reduce production capacity.
Summary of the invention
Big at prior art electronic communication equipment response band instability, volume, lack elasticity, production cost height and the low problem of production efficiency be installed, provide that a kind of response band is stable, overall volume is little, conveniently install, production cost is low and the electronic communication equipment of the application antenna modules that production efficiency is high is real in necessary.
Provide a kind of manufacturing process of above-mentioned electronic communication equipment real simultaneously for necessary.
Also be necessary to provide a kind of mobile phone of using antenna modules simultaneously.
A kind of electronic communication equipment of using antenna modules, comprise a communications module, a tool receiving space shell and an antenna modules, described communications module is contained in the receiving space of described shell, the corresponding electrical connection with described communications module of described antenna modules, described antenna modules and described shell adopt the laser direct forming method to be formed on the outer surface of described shell.
Preferably, described antenna modules comprises a folded successively active plastic layer, a metal pattern layer and an insulating protective layer of establishing.
Preferably, described active plastic layer is to be formed on described case surface by the quadric injection mould moulding process.
Preferably, described metal pattern layer is to be formed on described active plastic layer surface by laser direct forming technology, and described insulating protective layer covers described metal pattern layer.
Preferably, described antenna modules comprises an antenna panel, a signal feed-in point and an earth point of space.
Preferably, described communications module comprises conducting terminal, corresponding with the signal feed-in point of the described antenna panel respectively electrical connection of described conducting terminal.
A kind of manufacturing process of using the antenna modules electronic communication equipment, it comprises the steps: at first, provides a communications module and to accommodate the shell of described communications module; Secondly, cooperate laser direct forming technology to form an antenna modules by injection molding process in described case surface.
A kind of mobile phone of using antenna modules, comprise a circuit board, a mobile phone shell and an antenna modules, described antenna modules comprises an antenna panel, a signal feed-in point and an earth point, and described antenna panel and described signal feed-in point and earth point are formed on two opposite side surfaces of described phone housing respectively by laser direct forming technology.
Compared to prior art, described antenna modules is integrated in the outer surface of the shell of described electronic communication equipment or mobile phone by laser direct forming technology, make the effective area of described antenna modules increase with the surface of described shell is corresponding, and be not subject to equipment and mobile phone self inner space, the frequency band broad that provides, can in the broad frequency band scope, produce the desirable strength of resonance, make response band stable.Secondly, because described antenna modules is integrated in described case surface, reduce the space that holds described antenna modules separately, reduce component number, rationally utilize the receiving space in the described shell, improve elasticity is installed, reduce the overall volume of equipment and mobile phone in the time of ease of assembly.
Compared to prior art, in manufacture process, avoid using two cover grinding tools to make antenna holder and metal clips respectively, the higher laser direct forming method of adopting process degree of controllability directly forms antenna modules, enhances productivity, and reduces cost greatly.
Description of drawings
Fig. 1 is a kind of mobile phone antenna modules perspective view related to the present invention.
Fig. 2 is the structural representation that the present invention uses the electronic communication equipment of antenna modules.
Fig. 3 is the side structure schematic diagram of antenna modules shown in Figure 2.
Fig. 4 is the perspective view that the present invention uses the mobile phone of antenna modules.
Fig. 5 is another angle schematic perspective view of mobile phone shown in Figure 4
Embodiment
Below in conjunction with accompanying drawing antenna modules of the present invention and manufacturing process, the electronic communication equipment that adopts this antenna modules, mobile phone and manufacturing process thereof are described.
Seeing also Fig. 2, is a kind of structural representation of using the electronic communication equipment of antenna modules of the present invention.Described electronic communication equipment 2 comprises the shell 23 and an antenna modules 25 of a communications module 21, a tool receiving space.Described shell 23 is fixed and is accommodated described communications module 21, and described antenna modules 25 is integrated in described shell 23 surfaces.Described antenna modules 25 is electrically connected mutually with described communications module 21, the corresponding transmitting-receiving that realizes signal.
The various signals of described communications module 21 corresponding generations, and to transferring to described antenna modules 25 after the various signal alignment processings that produced.On the other hand, described communications module 21 is corresponding to receive the received various signals of described antenna modules 25, and the signal that alignment processing received.Described communications module 21 comprises two conducting terminals 211.
Described shell 23 is plastic casings of a tool receiving space, and it accommodates described communications module 21, with the described communications module 21 of effective support fixation, and protects described communications module 21 to avoid extraneous implements bump and damages.
The side structure of described antenna modules 25 as shown in Figure 3, it comprises an active plastic layer 251, a metal pattern layer 253 and an insulating protective layer 255 that is cascading.Described active plastic layer 251 is but that the modified plastics with laser activation is a raw material, adopts technology injection mouldings such as common injection molding apparatus, mould to form.Described active plastic layer 251 is formed on the surface of described shell 23 away from communications module 21 sides by secondary forming process.
Described metal pattern layer 253 is that (Laser Direct Structuring, LDS) technology is formed on line pattern the conductive pattern layer on described active plastic layer 251 surfaces to the employing laser direct forming.The profile of wherein said metal pattern layer 253 is corresponding to the track that described laser direct forming scanned, and described metal pattern layer 253 materials can be metals such as copper.Described metal pattern layer 253 comprises one first antenna panel 2531, one second antenna panel 2532.Described first antenna panel 2531 and second antenna panel 2532 are provided with at interval.Each antenna panel 2531,2532 correspondence respectively comprises a signal feed-in point 2533 and an earth point 2534.
Please consult Fig. 2 once more, described insulating protective layer 255 is one to be coated in the insulator on described metal pattern layer 253, described active plastic layer 251 surfaces, and it covers described metal pattern layer 253, avoids it to be exposed in the air.
When making described antenna modules 25, its manufacturing step is as follows:
At first, injection mo(u)lding: but be raw material with the modified plastics of laser activation, adopt common injection molding process quadric injection mould to go out plastic body and be formed at described shell 23 surfaces, form active plastic layer 251.
Secondly, laser activation: but with focused beam line pattern is transformed into the modified plastics surface of laser activation, will make zone activated, the surface, coarse figure position of conductive pattern.
Then, metal coating: formed conducting metal by the figure position of laser activation deposition, obtain metal pattern layer 253, it is respectively described first antenna panel 2531, second antenna panel 2532 that wherein said metal pattern layer 253 is positioned at shell 231 outer surfaces part, and the part that is positioned at shell 231 inner surfaces is respectively described signal feed-in point 2533 and earth point 2534.
At last, armor coated: the appearance in described metal pattern layer 253 applies formation insulating protective layer 255.Wherein, described insulating protective layer 255 covers and is positioned at described first antenna panel 2531, second antenna panel, 2532 regions; avoid described first antenna panel 2531, second antenna panel 2532 to be exposed in the external environment; simultaneously; in described signal feed-in point 2533 and earth point 2534 regions; it is exposed in the external environment, so as with the conducting terminal 211 corresponding electrical connections of communications module 21.
When the above-mentioned electronic communication equipment 2 of assembling, adopt laser direct forming to be integrated in the surface of described shell 23 described antenna modules 25, described shell 23 is fixedly accommodated described communications module 21 in it, and the antenna panel 2531,2532 of described antenna modules 25 is located at the surface of described shell 23 away from described communications module 21 1 sides.And the fringe region of described antenna modules 25 extends to the inner surface of described shell 23, and described signal feed-in point 2533 and earth point 2534 are located at the inner surface of described shell 23, and distinguishes corresponding electrical connections with the conducting terminal 211 of described communications module 21.
Because the radiation of antenna is to be the both sides generation radiation of middle mind-set antenna with antenna.In above-mentioned electronic communication equipment 2, described first antenna panel 2531 and second antenna panel 2532 are arranged at the outer surface of described shell 23, effectively avoid shielding the problem of the signal reception difference that phenomenon brings.Because described antenna modules 25 is the surfaces that are formed directly into described shell 23, so can corresponding increase the design area of antenna modules 25 as required, and be not limited to the receiving space of described electronic communication equipment 2 self inside, and then improve response band stability.That is to say, because the employing laser direct forming can be directly in shell 23 surface design larger area antenna panel 2531,2532, improve the response band stability, make described antenna modules 25 can receive the frequency of broad, particularly HFS can produce the desirable strength of resonance when 1900MHz.
For electronic communication equipment; its easily because of with external object; as contacts such as operating personnel's healths and cause signal shorts or signal shielding; and in above-mentioned electronic communication equipment 2; can form antenna modules 25 as required in the selection zone that is not easy to contact; and surface-coated insulating protective layer 255, the communication reliability of raising product.
On the other hand, because the lightening development trend of electronic communication equipment is required now, described antenna modules 25 is integrated in the outer surface of described shell 23, after described electronic communication equipment 2 assemblings were finished, the inside of described shell 23 did not need headspace to accommodate antenna modules 25, has reduced number of elements, saved receiving space, reduce overall volume, more help realizing the lightening of electronic communication equipment 2, made things convenient for assembling.
Compared to prior art, the antenna modules 25 and the shell 23 of electronic communication equipment 2 of the present invention integrate, and have rationally utilized receiving space, have improved product slimming degree.In manufacture process, utilize shell 23 as antenna holder, omit independent mould and make independently antenna holder, simplified technology, reduced number of elements, improve the degree of controllability of product manufacture, improved production efficient simultaneously and reduced production costs.
See also Fig. 4 and Fig. 5 again, wherein Fig. 4 is the schematic perspective view of antenna modules of the present invention when being applied to mobile phone, and Fig. 5 is the schematic perspective view of another angle of mobile phone shown in Figure 4.Described mobile phone 3 comprises a circuit board 31, a mobile phone shell 33 and an antenna modules 35.The described antenna modules of the antenna modules 35 that wherein is applied to mobile phone 3 and a last execution mode 25 is basic identical, described phone housing 33 surround a receiving space, described circuit board 31 correspondences are contained in the described receiving space.Described antenna modules 35 is integrated in the surface of described phone housing 33 away from described receiving space one side, and with described circuit board 31 corresponding electrical connections.
Described antenna modules 35 is to adopt injection mo(u)lding to cooperate the laser direct forming technology to be formed at the metal conducting layer on phone housing 33 surfaces, and it is in order to realize the signal transmitting and receiving between described mobile phone 3 and the extraneous communication equipment.The antenna panel of described antenna modules 35 is located at the outer surface of described phone housing 33, described signal feed-in point 2533 and described earth point 2534 extend to described phone housing 33 inner surfaces from the antenna panel marginal portion on described phone housing 33 surfaces, described signal feed-in point 2533 and described earth point 2534 directly are exposed in the external environment, with described circuit board 31 corresponding electrical connections.
In above-mentioned mobile phone 3, described antenna modules 35 is integrated in described phone housing 33, significantly reduce the space of described mobile phone 3, make integral body more compact.And reduced element, ease of assembly reduces cost, and enhances productivity.
Certainly, in the present invention, described phone housing 33 can be that metal shell can be a plastic shell also, be intended to can effective technical problem of the present invention scheme all in design scope of the present invention.When described phone housing 33 was metal shell, described antenna modules 35 placed the described metal shell outside, avoids because of caused shielding of metal shell and response band problem of unstable.
Only be preferred case study on implementation of the present invention below, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. electronic communication equipment of using antenna modules, the shell and the antenna modules that comprise a tool receiving space, described communications module is contained in the receiving space of described shell, the corresponding electrical connection with described communications module of described antenna modules is characterized in that: described antenna modules and described shell adopt laser direct forming technology to be formed on the outer surface of described shell.
2. electronic communication equipment according to claim 1 is characterized in that: described antenna modules comprises a folded successively active plastic layer, a metal pattern layer and an insulating protective layer of establishing.
3. electronic communication equipment according to claim 2 is characterized in that: described active plastic layer is to be formed on described case surface by the quadric injection mould moulding process.
4. electronic communication equipment according to claim 3 is characterized in that: described metal pattern layer is to be formed on described active plastic layer surface by laser direct forming technology, and described insulating protective layer covers described metal pattern layer.
5. electronic communication equipment according to claim 1 is characterized in that: described antenna modules comprises an antenna panel, a signal feed-in point and an earth point of space.
6. electronic communication equipment according to claim 5 is characterized in that: described communications module comprises conducting terminal, the corresponding electrical connection with the signal feed-in point of described antenna panel of described conducting terminal.
7. manufacturing process of using the electronic communication equipment of antenna modules, it comprises the steps:
At first, provide a communications module and to accommodate the shell of described communications module;
Secondly, cooperate laser direct forming technology to form an antenna modules by injection molding process in the outer surface of described shell.
8. the manufacturing process of electronic communication equipment according to claim 7 is characterized in that: when wherein making described antenna modules, also comprise the steps: to form an active plastic layer in described case surface by the quadric injection mould moulding process; Form a metal pattern layer in described active plastic layer surface by laser direct forming technology; In described metal pattern layer surface-coated one insulating protective layer, described insulating protective layer covers described metal pattern layer.
9. the manufacturing process of electronic communication equipment according to claim 8, it is characterized in that: described shell is a metal shell or plastic casing.
10. mobile phone of using antenna modules, it comprises a circuit board, a mobile phone shell and an antenna modules, described antenna modules comprises an antenna panel, a signal feed-in point and an earth point, it is characterized in that: described antenna panel and described signal feed-in point and earth point are formed on two opposite side surfaces of described phone housing respectively by laser direct forming technology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910189159 CN101728630B (en) | 2009-12-21 | 2009-12-21 | Electronic communication equipment and manufacturing process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910189159 CN101728630B (en) | 2009-12-21 | 2009-12-21 | Electronic communication equipment and manufacturing process thereof |
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| CN101728630A true CN101728630A (en) | 2010-06-09 |
| CN101728630B CN101728630B (en) | 2013-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200910189159 Expired - Fee Related CN101728630B (en) | 2009-12-21 | 2009-12-21 | Electronic communication equipment and manufacturing process thereof |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102227036A (en) * | 2011-03-18 | 2011-10-26 | 深圳桑菲消费通信有限公司 | Antenna system of mobile phone with metal shell |
| CN102595817A (en) * | 2012-03-02 | 2012-07-18 | 深圳市信维通信股份有限公司 | Manufacturing method for mobile terminal shell |
| CN102595816A (en) * | 2012-03-02 | 2012-07-18 | 深圳市信维通信股份有限公司 | Mobile terminal shell |
| CN102610899A (en) * | 2012-03-14 | 2012-07-25 | 广东欧珀移动通信有限公司 | Laser forming antenna and manufacturing process thereof |
| CN103022638A (en) * | 2012-12-13 | 2013-04-03 | 深圳市维力谷无线技术有限公司 | Method for producing mobile terminal built-in antennas with laser direct molding technology |
| CN103051746A (en) * | 2011-10-12 | 2013-04-17 | 启碁科技股份有限公司 | Portable electronic device with antenna structure |
| CN103178344A (en) * | 2013-04-01 | 2013-06-26 | 昆山睿翔讯通通信技术有限公司 | Multi-frequency-band rear metal cover mobile phone antenna |
| CN105244602A (en) * | 2015-11-06 | 2016-01-13 | 传为科技（天津）有限公司 | Novel antenna structure suitable for wearable equipment, and technology thereof |
| CN105283013A (en) * | 2015-11-10 | 2016-01-27 | 广东欧珀移动通信有限公司 | Surface processing method of terminal housing |
| US20170005392A1 (en) * | 2015-07-02 | 2017-01-05 | AAC Technologies Pte. Ltd. | Mobile device with lds antenna module and method for making lds antenna module |
| CN107181043A (en) * | 2017-05-22 | 2017-09-19 | 上海安费诺永亿通讯电子有限公司 | A kind of mobile radio terminal |
| WO2017197795A1 (en) * | 2016-05-17 | 2017-11-23 | 北京小米移动软件有限公司 | Terminal housing and terminal |
| CN110911808A (en) * | 2019-12-19 | 2020-03-24 | 江西农业大学 | Microstrip antenna arranged on rear cover of mobile phone and manufacturing process thereof |
| CN111491472A (en) * | 2020-04-26 | 2020-08-04 | 重庆长安新能源汽车科技有限公司 | Vehicle control unit casing and new energy automobile |
| CN114967263A (en) * | 2022-05-30 | 2022-08-30 | 上海天马微电子有限公司 | Display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102227036A (en) * | 2011-03-18 | 2011-10-26 | 深圳桑菲消费通信有限公司 | Antenna system of mobile phone with metal shell |
| CN103051746A (en) * | 2011-10-12 | 2013-04-17 | 启碁科技股份有限公司 | Portable electronic device with antenna structure |
| CN102595817A (en) * | 2012-03-02 | 2012-07-18 | 深圳市信维通信股份有限公司 | Manufacturing method for mobile terminal shell |
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| CN102610899A (en) * | 2012-03-14 | 2012-07-25 | 广东欧珀移动通信有限公司 | Laser forming antenna and manufacturing process thereof |
| CN103022638A (en) * | 2012-12-13 | 2013-04-03 | 深圳市维力谷无线技术有限公司 | Method for producing mobile terminal built-in antennas with laser direct molding technology |
| CN103022638B (en) * | 2012-12-13 | 2015-07-29 | 深圳市维力谷无线技术有限公司 | A kind of method adopting laser direct structuring technique to make embedded antenna for mobile terminal |
| CN103178344A (en) * | 2013-04-01 | 2013-06-26 | 昆山睿翔讯通通信技术有限公司 | Multi-frequency-band rear metal cover mobile phone antenna |
| US20170005392A1 (en) * | 2015-07-02 | 2017-01-05 | AAC Technologies Pte. Ltd. | Mobile device with lds antenna module and method for making lds antenna module |
| CN105244602A (en) * | 2015-11-06 | 2016-01-13 | 传为科技（天津）有限公司 | Novel antenna structure suitable for wearable equipment, and technology thereof |
| CN105283013A (en) * | 2015-11-10 | 2016-01-27 | 广东欧珀移动通信有限公司 | Surface processing method of terminal housing |
| WO2017197795A1 (en) * | 2016-05-17 | 2017-11-23 | 北京小米移动软件有限公司 | Terminal housing and terminal |
| CN107395788A (en) * | 2016-05-17 | 2017-11-24 | 北京小米移动软件有限公司 | Terminal shell and terminal |
| US10461404B2 (en) | 2016-05-17 | 2019-10-29 | Beijing Xiaomi Mobile Software Co., Ltd. | Terminal housing and terminal |
| CN107181043A (en) * | 2017-05-22 | 2017-09-19 | 上海安费诺永亿通讯电子有限公司 | A kind of mobile radio terminal |
| CN107181043B (en) * | 2017-05-22 | 2020-03-27 | 上海安费诺永亿通讯电子有限公司 | Wireless mobile terminal |
| CN110911808A (en) * | 2019-12-19 | 2020-03-24 | 江西农业大学 | Microstrip antenna arranged on rear cover of mobile phone and manufacturing process thereof |
| CN111491472A (en) * | 2020-04-26 | 2020-08-04 | 重庆长安新能源汽车科技有限公司 | Vehicle control unit casing and new energy automobile |
| CN114967263A (en) * | 2022-05-30 | 2022-08-30 | 上海天马微电子有限公司 | Display device |
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|---|---|
| CN101728630B (en) | 2013-07-10 |
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