CN102231768B - Electro-static protection circuit of mobile terminal and mobile terminal provided with same - Google Patents
Electro-static protection circuit of mobile terminal and mobile terminal provided with same Download PDFInfo
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- CN102231768B CN102231768B CN201010242924.4A CN201010242924A CN102231768B CN 102231768 B CN102231768 B CN 102231768B CN 201010242924 A CN201010242924 A CN 201010242924A CN 102231768 B CN102231768 B CN 102231768B
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- protection line
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Abstract
The invention discloses an electro-static protection circuit of a mobile terminal and a mobile terminal provided with the same. The electro-static protection circuit comprises a circuit board and a first electro-static protection wire, wherein a ground plane is arranged on the circuit board, the circuit board comprises a key circuit board, the first electro-static protection wire is arranged at the edge of the key circuit board and corresponds to a junction gap between a upper shell and a lower shell of the mobile terminal, and the first electro-static protection wire is connected with the ground plane. By using the electro-static protection circuit, electro-static protection function can be realized without the additional installation of an electro-static discharge (ESD) prevention device.
Description
Technical field
The present invention relates to electrostatic protection field, in particular a kind of electrostatic discharge protective circuit of mobile terminal and utilize the mobile terminal of this circuit.
Background technology
ESD (Electro-Static discharge, static discharge) be a very common natural phenomena in life, when different material material is in contact with one another, a certain amount of electric charge all may be accumulated in surface, in the time running into other object, may produce the static discharge voltage up to tens kilovolts.Electronic equipment all may suffer the infringement of this electromagnetic energy.Along with the extensive use of current microelectronic component, ESD problem is also more paid attention to.
Existing mobile terminal is all generally a very accurate electronic equipment.For example, mobile phone is more and smaller and more exquisite thin now, and the integrated level of inner electronic devices and components is also more and more higher.In order to ensure reliability and the useful life of mobile phone, must solve from circuit and contour structures the ESD problem of mobile phone.
For the ESD problem that analogue mobile phone runs in actual use, in mobile phone development test, with a kind of ESD gun, mobile phone is carried out to discharge test.Mobile phone must reach corresponding domestic or international standard.Although the shell of mobile phone seems can be completely by inner electronic device and external isolation, but because some part of reason of structure inevitably exists and the outside path being connected, as shown in Figure 1, such as the receiver 11 of mobile phone, microphone aperture 12, the gaps 13 of upper lower casing bound fraction etc., these are all for ESD provides the passage that enters mobile phone.Since this part passage cannot carry out shutoff by the contour structures of mobile phone completely, when static is entered after mobile phone by external, will discharge for it finds a suitable path, in order to avoid being discharged on electronic device, it causes damage.
The method of existing routine is on the guarantor path of passing through at these these static or the other device that increases special anti-ESD of the device protecting at needs, allows electrostatic charge before arriving protected electronic device, import to the ground plane of mobile phone by the device of these anti-ESD.And by the observation to handset structure and circuit layout, a lot of places are not need the device that increases extraly anti-ESD to solve problem.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
The object of the present invention is to provide a kind of electrostatic discharge protective circuit, be intended to solve some problems that arrange that entered the release circuit after mobile terminal by described path with electrostatic protection problem, the especially static of the outside path being connected on mobile terminal.
Technical scheme of the present invention is as follows:
A kind of electrostatic discharge protective circuit of mobile terminal, comprise wiring board, on described wiring board, be provided with ground plane, described wiring board comprises a button circuit board, wherein, also comprise the first electrostatic protection line, described the first electrostatic protection line is arranged on the gap position of the corresponding mobile terminal upper and lower enclosure of key circuit panel edges combination; Described the first electrostatic protection line is connected with described ground plane.
The electrostatic discharge protective circuit of described mobile terminal, wherein, described the first electrostatic protection line is the Copper Foil arranging along the shape of key circuit panel edges, described copper foil surface is exposed.
The electrostatic discharge protective circuit of described mobile terminal, wherein, the wiring board of described mobile terminal also comprises a receiver circuit board, is provided with position, receiver hole and the second electrostatic protection line on described handset circuitry plate; Described the second electrostatic protection wire loop arranges around position, described receiver hole, and described the second electrostatic protection line is connected with described ground plane.
The electrostatic discharge protective circuit of described mobile terminal, wherein, described the second electrostatic protection line is the Copper Foil line of an annular, described Copper Foil line surface exposure.
The electrostatic discharge protective circuit of described mobile terminal, wherein, the wiring board of described mobile terminal also comprises a microphone circuit plate, is provided with microphone aperture position and the 3rd electrostatic protection line on described microphone circuit plate; Described the 3rd electrostatic protection line is arranged on the position of pressing close to of described microphone aperture position, and described the 3rd electrostatic protection line is connected with described ground plane; Described the 3rd electrostatic protection line is a Copper Foil line, described Copper Foil line surface exposure.
A kind of mobile terminal, wherein, described mobile terminal comprises electrostatic discharge protective circuit claimed in claim 5.
Described mobile terminal, wherein, described mobile terminal is mobile phone.
Beneficial effect of the present invention: the present invention is by the place being likely directly discharged into by extraneous ESD on mobile terminal plate; increase an electrostatic protection line; and making described electrostatic protection line out exposed, the ground plane of the wiring board of described electrostatic protection line and mobile terminal is connected.In the time that electrostatic charge sees through casing and enters on the wiring board of mobile terminal, guide on the ground plane on its wiring board that is discharged into as soon as possible mobile terminal, described ground plane is made up of larger areas of copper, and is connected to the negative pole of battery of mobile terminal.Electrostatic charge is distributed on large-area ground plane after entering on the wiring board of mobile terminal soon like this, and battery of mobile terminal is equivalent to a large electric capacity, has also absorbed the energy of electric charge, thereby greatly reduces the infringement of electrostatic charge to electronic device.
Brief description of the drawings
Fig. 1 has with outside the path schematic diagram being connected in existing mobile phone;
Fig. 2 is the electrostatic discharge protective circuit schematic diagram of the button circuit board of the mobile terminal wiring board that provides of the embodiment of the present invention one;
Fig. 3 is the electrostatic discharge protective circuit schematic diagram of the handset circuitry plate of the mobile terminal wiring board that provides of the embodiment of the present invention two;
Fig. 4 is the electrostatic discharge protective circuit schematic diagram of the microphone circuit plate of the mobile terminal wiring board that provides of the embodiment of the present invention three.
Embodiment
For making object of the present invention, technical scheme and advantage clearer, clear and definite, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.
Because static is to enter mobile terminal inside by mobile terminal and extraneous interface channel substantially, for example, the receiver of mobile terminal, microphone aperture, the gap of upper lower casing bound fraction, the gap between button and casing etc.Provide a kind of electrostatic discharge protective circuit according to These characteristics; the concrete steps of the design principle of described circuit are: the place being likely directly discharged into by extraneous ESD on mobile terminal plate; increase an electrostatic protection line; and making this electrostatic protection line out exposed, the ground plane of this electrostatic protection line and mobile terminal is connected.When electrostatic charge enters on mobile terminal plate by casing, guide it to be discharged into as soon as possible on the ground plane on mobile terminal plate, described ground plane is made up of larger areas of copper, and is connected to the negative pole of battery of mobile terminal.Electrostatic charge is distributed on large-area ground plane after entering on mobile terminal plate soon like this, and battery of mobile terminal is equivalent to a large electric capacity, has also absorbed the energy of electric charge, thereby greatly reduces the infringement of electrostatic charge to electronic device.
The electrostatic discharge protective circuit schematic diagram of the button circuit board of the mobile terminal wiring board that Fig. 2 provides for embodiment mono-; it comprises key circuit 21 and the first electrostatic protection line 22, and described the first electrostatic protection line 22 is arranged on the gap position of the edge corresponding mobile terminal upper and lower enclosure combination of the button circuit board 20 of mobile terminal wiring board.Described the first electrostatic protection line 22 is electrostatic discharge protective circuit; being shaped as along the panel edges of button circuit board 20 of described the first electrostatic protection line 22; the metal line forming; this metal wire is generally and covers the Copper Foil line that copper forms, and this Copper Foil line is connected with the ground plane (not shown in FIG.) of mobile terminal wiring board.In the time that electrostatic charge enters button circuit board by gap, what first touch is described the first electrostatic protection line 22, is then discharged on the ground plane of wiring board of mobile terminal by the first electrostatic protection line 22.Thereby can not be discharged into the damage that causes device on key circuit on the key circuit 21 on side.Its benefit is not only to have saved some devices used in original electrostatic discharge protective circuit, but also makes electrostatic protection better effects if.
The electrostatic discharge protective circuit schematic diagram of the handset circuitry plate on the wiring board of the mobile terminal that Fig. 3 provides for embodiment bis-, it comprises position, receiver hole 31, handset circuitry 32 and the second electrostatic protection line 33.Described the second electrostatic protection line 33 is arranged between position 31, receiver hole and handset circuitry 32; described the second electrostatic protection line 33 is a Copper Foil line; and arrange around position, described receiver hole 31, normally direct wiring formation and the naked leakage in surface of described Copper Foil line in designed lines plate of this Copper Foil line.Described the second electrostatic protection line 33 is connected with the ground plane of the wiring board of mobile terminal, for electrostatic charge being imported to the ground plane of wiring board.
On the top of receiver and the casing of correspondence position, there is an open sender, be directly exposed to the external world.Between position 31, receiver hole and handset circuitry 32, arrange one and expose the second electrostatic protection line 33; can see through before sender enters handset circuitry 32 and just first be discharged on the ground plane of wiring board by the second electrostatic protection line 33 at static; can not damage the handset circuitry 32 of mobile terminal, can effectively save electrostatic protection device with respect to the electrostatic discharge protective circuit of existing mobile terminal handset circuitry.
The electrostatic discharge protective circuit schematic diagram of the microphone circuit plate of the mobile terminal wiring board that Fig. 4 provides for embodiment tri-, described microphone circuit plate comprises microphone aperture position 41, microphone peripheral circuits 42 and the 3rd electrostatic protection line 43.The position of pressing close in described microphone aperture position 41 arranges the 3rd electrostatic protection line 43, and described the 3rd electrostatic protection line 43 is kept apart described microphone peripheral circuits 42 with microphone aperture position 41.Described the 3rd electrostatic protection line 43 is for being formed on the surperficial Copper Foil line of microphone circuit plate by covering copper, the surface exposure of described the 3rd electrostatic protection line can directly contact with airborne static outside.Described the 3rd electrostatic protection line 43 is connected on the ground plane of wiring board of mobile terminal, can import electrostatic charge into battery cathode by ground plane.Above microphone aperture position 41, the relevant position of casing is provided with a perforate that receives sound, directly leads to outside.Electrostatic charge sees through described perforate and enters into mobile terminal inside; microphone aperture position other increase exposed three ground plane 43 corresponding in perforate can receive the electrostatic charge that outside enters; ensure that electrostatic charge forwards on the ground plane of wiring board in contact microphone peripheral circuits; thereby avoid microphone peripheral circuits 42 to be damaged by electrostatic charge, effectively complete electrostatic protection function.
This electrostatic discharge protective circuit is compared simple and practical with other electrostatic discharge protective circuit.Do not increase special Anti-static device as far as possible, reduced the shared space of special Anti-static device and cost.Import successful after this electrostatic protection method, the mobile terminal ESD problem at similar position is mostly resolved.
The present invention also provides a kind of mobile terminal, and described mobile terminal comprises above-mentioned electrostatic discharge protective circuit.Described mobile terminal also comprises mobile phone, walkman, portable game machine etc.
Should be understood that, application of the present invention is not limited to above-mentioned giving an example, and for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection range of claims of the present invention.
Claims (3)
1. the electrostatic discharge protective circuit of a mobile terminal, comprise wiring board, on described wiring board, be provided with ground plane, described wiring board comprises a button circuit board, it is characterized in that, also comprise the first electrostatic protection line, described the first electrostatic protection line is arranged on the gap position of the corresponding mobile terminal upper and lower enclosure of key circuit panel edges combination; Described the first electrostatic protection line is connected with described ground plane;
Described the first electrostatic protection line is the Copper Foil arranging along the shape of key circuit panel edges, and described copper foil surface is exposed;
Electrostatic charge enters on mobile terminal wiring board by casing, and electrostatic protection line guides it to be discharged into as soon as possible on the ground plane on mobile terminal wiring board, and described ground plane is made up of larger areas of copper, is connected to the negative pole of battery of mobile terminal;
The wiring board of described mobile terminal also comprises a receiver circuit board, is provided with position, receiver hole and the second electrostatic protection line on described handset circuitry plate; Described the second electrostatic protection wire loop arranges around position, described receiver hole, and described the second electrostatic protection line is connected with described ground plane;
Described the second electrostatic protection line is the Copper Foil line of an annular, described Copper Foil line surface exposure;
The wiring board of described mobile terminal also comprises a microphone circuit plate, is provided with microphone aperture position and the 3rd electrostatic protection line on described microphone circuit plate; Described the 3rd electrostatic protection line is arranged on the position of pressing close to of described microphone aperture position, and described the 3rd electrostatic protection line is connected with described ground plane; Described the 3rd electrostatic protection line is a Copper Foil line, described Copper Foil line surface exposure.
2. a mobile terminal, is characterized in that, described mobile terminal comprises electrostatic discharge protective circuit claimed in claim 1.
3. mobile terminal according to claim 2, is characterized in that, described mobile terminal is mobile phone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010242924.4A CN102231768B (en) | 2010-07-30 | 2010-07-30 | Electro-static protection circuit of mobile terminal and mobile terminal provided with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010242924.4A CN102231768B (en) | 2010-07-30 | 2010-07-30 | Electro-static protection circuit of mobile terminal and mobile terminal provided with same |
Publications (2)
| Publication Number | Publication Date |
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| CN102231768A CN102231768A (en) | 2011-11-02 |
| CN102231768B true CN102231768B (en) | 2014-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010242924.4A Active CN102231768B (en) | 2010-07-30 | 2010-07-30 | Electro-static protection circuit of mobile terminal and mobile terminal provided with same |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102548173B (en) * | 2012-01-30 | 2016-01-20 | 惠州Tcl移动通信有限公司 | A kind of electrostatic charge protection method and mobile terminal |
| CN102917527B (en) * | 2012-10-15 | 2016-12-21 | 北京小米科技有限责任公司 | A kind of electric elements and mobile terminal |
| US9609765B2 (en) | 2013-09-27 | 2017-03-28 | Intel Corporation | Chassis of electronic device |
| CN105828226B (en) * | 2015-08-28 | 2019-03-05 | 维沃移动通信有限公司 | A kind of microphone electrostatic protection apparatus |
| CN105828227A (en) * | 2015-08-28 | 2016-08-03 | 维沃移动通信有限公司 | Microphone electrostatic protection device |
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| CN2807617Y (en) * | 2005-07-04 | 2006-08-16 | 于江宏 | Mobile phone circuit board for improving function of mobile phone antenna |
| CN1947280A (en) * | 2004-03-15 | 2007-04-11 | 日本电气株式会社 | Portable communication equipment and battery pack |
| CN201075546Y (en) * | 2007-08-08 | 2008-06-18 | 青岛海信移动通信技术股份有限公司 | Battery connector and mobile communication apparatus having the battery connector |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100334923C (en) * | 2003-11-17 | 2007-08-29 | 仁宝电脑工业股份有限公司 | Electron device having anti static discharging circuit board |
| KR100619852B1 (en) * | 2004-04-30 | 2006-09-08 | 엘지전자 주식회사 | Main body of a mobile communication terminal |
| CN1980518A (en) * | 2005-11-29 | 2007-06-13 | 华硕电脑股份有限公司 | Electrostatic-discharge-proof electronic apparatus |
| CN2884789Y (en) * | 2006-02-24 | 2007-03-28 | 佛山市顺德区顺达电脑厂有限公司 | Electrostatic preventer of inputting device |
| CN201365373Y (en) * | 2009-02-23 | 2009-12-16 | 深圳Tcl新技术有限公司 | PCB board for improving electrostatic leakage |
| CN201781274U (en) * | 2010-07-30 | 2011-03-30 | 惠州Tcl移动通信有限公司 | Mobile terminal and electrostatic protection circuit thereof |
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- 2010-07-30 CN CN201010242924.4A patent/CN102231768B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1947280A (en) * | 2004-03-15 | 2007-04-11 | 日本电气株式会社 | Portable communication equipment and battery pack |
| CN2807617Y (en) * | 2005-07-04 | 2006-08-16 | 于江宏 | Mobile phone circuit board for improving function of mobile phone antenna |
| CN201075546Y (en) * | 2007-08-08 | 2008-06-18 | 青岛海信移动通信技术股份有限公司 | Battery connector and mobile communication apparatus having the battery connector |
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| CN102231768A (en) | 2011-11-02 |
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Effective date of registration: 20201224 Address after: 225700 No. 1 Chuang Road, Zhaoyang street, Xinghua, Taizhou, Jiangsu. Patentee after: XINGHUA TIANDONG SOFTWARE TECHNOLOGY Co.,Ltd. Address before: 511400 No.106 Fengze East Road, Nansha District, Guangzhou City, Guangdong Province (self compiled Building 1) x1301-a4845 (cluster registration) (JM) Patentee before: Guangzhou shengxia Intellectual Property Operation Co.,Ltd. Effective date of registration: 20201224 Address after: 511400 No.106 Fengze East Road, Nansha District, Guangzhou City, Guangdong Province (self compiled Building 1) x1301-a4845 (cluster registration) (JM) Patentee after: Guangzhou shengxia Intellectual Property Operation Co.,Ltd. Address before: 516006 TCL mobile communication company, No. 23 residential district, Huizhou hi tech Development Zone, Huicheng District, Guangdong Patentee before: HUIZHOU TCL MOBILE COMMUNICATION Co.,Ltd. |
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Effective date of registration: 20211129 Address after: 063000 east of Pingqing Road, Qian'an high tech Industrial Development Zone, Tangshan City, Hebei Province (in the courtyard of Qian'an Aoxing Trading Co., Ltd.) Patentee after: Qian'an Fuyun motor vehicle testing Co.,Ltd. Address before: 225700 No. 1 Chuang Road, Zhaoyang street, Xinghua, Taizhou, Jiangsu. Patentee before: XINGHUA TIANDONG SOFTWARE TECHNOLOGY Co.,Ltd. |