CN104866891A - Intelligent card with electrostatic protection - Google Patents
Intelligent card with electrostatic protection Download PDFInfo
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- CN104866891A CN104866891A CN201510295842.9A CN201510295842A CN104866891A CN 104866891 A CN104866891 A CN 104866891A CN 201510295842 A CN201510295842 A CN 201510295842A CN 104866891 A CN104866891 A CN 104866891A
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- carrier band
- voltage
- electrostatic
- vent unit
- electrostatic protection
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Abstract
The invention provides an intelligent card with electrostatic protection, which comprises a carrier band, a safety chip and a drive control module and also comprises a electrostatic discharging module, the safety chip is respectively connected with the carrier band and the drive control module, and the electrostatic discharging module is connected with the carrier band; the electrostatic discharging module is configured to discharge input current when the voltage input to the electrostatic discharging module through the carrier band is larger than specific voltage.
Description
Technical field
The present invention relates to display type intelligent cards field, particularly relate to the intelligent cards with electrostatic protection.
Background technology
Along with the high speed development of the network information technology, information security has become very important.Conventional magnetic stripe cacaine is with low content of technology, and information storage amount is little, is easy to be replicated, and is faced with the situation be eliminated.Smart card, especially electronic cards because of its information storage amount large, the high reliability of information record and high security, and the convenient service that can provide multiple channel, will replace used magnetic stripe card gradually.
Intelligent cards of the prior art is connected with outside by carrier band usually, but, because on card face, the material of carrier band is Copper Foil, it is conductive material, can by static guiding to the built-in chip of card and other coupled modules, and drive control module is wherein vulnerable to most electrostatic influence, easily broken.
Summary of the invention
The technical problem to be solved in the present invention how to prevent electrostatic to the infringement of drive control module.
In order to solve this technical matters, the invention provides a kind of intelligent cards with electrostatic protection, comprise carrier band and drive control module, also comprise electrostatic leakage module and safety chip, described safety chip connects described carrier band and described drive control module respectively, and described electrostatic leakage module is connected with described carrier band; Described electrostatic leakage module is configured to when the voltage inputing to described electrostatic leakage module through described carrier band is greater than specific voltage, releases to the electricity of input.
Optionally, described electrostatic leakage module comprises n vent unit, n contact of described carrier band is connected to one end of n described vent unit respectively, n contact of described carrier band also respectively with n port of described safety chip, described vent unit is configured to, when the voltage of the corresponding contact input through described carrier band is greater than specific voltage, carries out part release to the electricity inputted from this contact.
Optionally, described vent unit is configured to the conducting when the voltage of the corresponding contact input through described carrier band is greater than specific voltage further, thus realizes releasing.
Optionally, described vent unit is voltage dependent resistor (VDR).
Optionally, the input voltage of corresponding contact when the protection voltage of described voltage dependent resistor (VDR) works normally higher than carrier band.
Optionally, described vent unit is the diode component with esd protection function.
Optionally, the other end ground connection of described vent unit.
Optionally, the negative pole of another termination battery card of described vent unit.
Optionally, a contact of described carrier band is by the grounding ports ground connection of described safety chip.
Optionally, the described intelligent cards with electrostatic protection also comprises display, and described drive control module is connected with display.
The size of the present invention's voltage is as the basis for estimation whether having electrostatic influence circuit, by the introducing of electrostatic leakage module, effective monitoring is achieved to the voltage of self-contained tape input, once it beyond a specific voltage, just realize releasing, thus prevent the input of electrostatic to damage drive control module, thus increase the serviceable life of card, ensure the stability that card uses.
Accompanying drawing explanation
Fig. 1 is the connection diagram of the intelligent cards in one embodiment of the invention with electrostatic protection;
Fig. 2 is the concrete connection diagram of carrier band in one embodiment of the invention, safety chip and electrostatic leakage module.
Embodiment
Below with reference to Fig. 1 and Fig. 2, the intelligent cards with electrostatic protection provided by the invention is described in detail; it is optional embodiment of the present invention; can think, those skilled in the art can modify to it and polish in the scope not changing the present invention's spirit and content.
Please refer to Fig. 1 and Fig. 2, the invention provides a kind of intelligent cards with electrostatic protection, comprise carrier band, safety chip and drive control module, also comprise electrostatic leakage module, described safety chip connects described carrier band and described drive control module respectively, and described electrostatic leakage module is connected with described carrier band; Described electrostatic leakage module is configured to when the voltage inputing to described electrostatic leakage module through described carrier band is greater than specific voltage, releases to the electricity of input.
Drive control module wherein can select in the prior art and be connected with display and load module respectively as in figure 1.Certainly, it also can only be connected with display, and especially when it is connected with display, display especially needs the driving of drive control module to work, and it is also more urgent to the demand of electrostatic prevention.When realizing visual function, namely drive control module reads information from safety chip, and be shown on display, visible card is held on staff and operates, when hand touches the words of carrier band, then can produce electrostatic, electrostatic flows to the link of safety chip and driver module, will have an impact to visual function.Intelligent cards is realizing common IC-card function, be then that card reader is passed through to bring connection safety chip, reads the content of safety chip.
In general, safety chip has done electrostatic protection, so this chip antistatic capability is stronger when designing.According to demand when its connection effect and real work, which kind of safety chip those skilled in the art can just adopt make rational selection completely.
The size of the present invention's voltage is as the basis for estimation whether having electrostatic influence circuit, by the introducing of electrostatic leakage module and safety chip, effective monitoring is achieved to the voltage of self-contained tape input, once it beyond a specific voltage, just realize releasing, thus prevent the input of electrostatic to damage drive control module, thus increase the serviceable life of card, ensure the stability that card uses.
In the embodiment of Fig. 2 signal, described electrostatic leakage module comprises n vent unit, corresponding, and the working port one of safety chip has n+1, and except port over the ground, all the other ports all need to release, and the contact of carrier band is that n+1 is individual.Specifically, in this embodiment, the quantity n of vent unit is chosen as 4, in the present embodiment, and the working port one of safety chip has 5, and except port over the ground, all the other ports all need to release.N contact of described carrier band is connected to one end of n described vent unit respectively, n contact of described carrier band also connects n port of described safety chip respectively, specific in the present embodiment, it is exactly one end that contact 1,2,3,4 is connected to four described vent unit respectively, contact 1,2,3,4 connects four ports of described safety chip respectively, and contact 5 is by the 5th port ground connection of safety chip.Namely a contact of described carrier band is by the grounding ports ground connection of described safety chip; Described vent unit is configured to, when the voltage of the corresponding contact input through described carrier band is greater than specific voltage, carries out part release to the electricity inputted from this contact.
Furthermore, described vent unit is configured to the conducting when the voltage of the corresponding contact input through described carrier band is greater than specific voltage further, thus realizes pressure release.
On this basis, in the present invention one optional embodiment, described vent unit is voltage dependent resistor (VDR).The input voltage of corresponding contact when the protection voltage of described voltage dependent resistor (VDR) works normally lower than carrier band.
Mode is particularly; vent unit is accessed in the contact of carrier band and with reference between ground; this vent unit can be understood as ESD protective device; conducting can be close to when voltage is greater than protection voltage; and voltage is close to when being less than this protection voltage and disconnects; this vent unit can be specifically voltage dependent resistor (VDR) (near protection voltage, resistance saltus step can occur).It should be noted that; when selecting vent unit here; need to select protection voltage vent unit with operating voltage during reader contact normal higher than carrier band, the protection voltage of such as vent unit is greater than 6V, and carrier band normally and reader contact time operating voltage less than or equal to 5.5V.
In another optional embodiment of the present invention, described vent unit is the diode component with esd protection function.
For the other end of vent unit, in the embodiment of Fig. 2 signal, select to be released by ground connection coming, in other optional embodiments of the present invention, also can by being received the negative pole of battery card.Battery card can be understood as the battery in order to power supply be configured on card.
In sum, the size of the present invention's voltage is as the basis for estimation whether having electrostatic influence circuit, by the introducing of electrostatic leakage module and safety chip, effective monitoring is achieved to the voltage of self-contained tape input, when normally working, carrier band transfers to drive control module by safety chip connection, once it beyond a specific voltage, just realize releasing, thus prevent the input of electrostatic to damage drive control module, thus increase the serviceable life of card, ensure the stability that card uses.
Claims (10)
1. one kind has the intelligent cards of electrostatic protection, comprise carrier band, safety chip and drive control module, it is characterized in that: also comprise electrostatic leakage module, described safety chip connects described carrier band and described drive control module respectively, and described electrostatic leakage module is connected with described carrier band; Described electrostatic leakage module is configured to when the voltage inputing to described electrostatic leakage module through described carrier band is greater than specific voltage, releases to the electricity of input.
2. there is the display type chip card of electrostatic protection as claimed in claim 1; it is characterized in that: described electrostatic leakage module comprises n vent unit; n contact of described carrier band is connected to one end of n described vent unit respectively; n contact of described carrier band also respectively with n port of described safety chip; described vent unit is configured to, when the voltage of the corresponding contact input through described carrier band is greater than specific voltage, carries out part release to the electricity inputted from this contact.
3. there is the display type chip card of electrostatic protection as claimed in claim 2, it is characterized in that: described vent unit is configured to the conducting when the voltage of the corresponding contact input through described carrier band is greater than specific voltage further, thus realizes releasing.
4. there is the intelligent cards of electrostatic protection as claimed in claim 2 or claim 3, it is characterized in that: described vent unit is voltage dependent resistor (VDR).
5. there is the intelligent cards of electrostatic protection as claimed in claim 4, it is characterized in that: the input voltage of corresponding contact when the protection voltage of described voltage dependent resistor (VDR) works normally higher than carrier band.
6. there is the intelligent cards of electrostatic protection as claimed in claim 2 or claim 3, it is characterized in that: described vent unit is the diode component with esd protection function.
7. there is the intelligent cards of electrostatic protection as claimed in claim 2 or claim 3, it is characterized in that: the other end ground connection of described vent unit.
8. there is the intelligent cards of electrostatic protection as claimed in claim 2 or claim 3, it is characterized in that: the negative pole of another termination battery card of described vent unit.
9. there is the intelligent cards of electrostatic protection as claimed in claim 1, it is characterized in that: a contact of described carrier band is by the grounding ports ground connection of described safety chip.
10. have the intelligent cards of electrostatic protection as claimed in claim 1, it is characterized in that: also comprise display, described drive control module is connected with display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510295842.9A CN104866891A (en) | 2015-06-02 | 2015-06-02 | Intelligent card with electrostatic protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510295842.9A CN104866891A (en) | 2015-06-02 | 2015-06-02 | Intelligent card with electrostatic protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104866891A true CN104866891A (en) | 2015-08-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510295842.9A Pending CN104866891A (en) | 2015-06-02 | 2015-06-02 | Intelligent card with electrostatic protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104866891A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2360883Y (en) * | 1999-04-16 | 2000-01-26 | 北京富根智能电表有限公司 | IC interface anti-strong current and anti-high voltage attack modular circuit |
| US20050007744A1 (en) * | 2003-07-10 | 2005-01-13 | Yoshitaka Okita | IC module and IC card |
| CN101221629A (en) * | 2007-01-10 | 2008-07-16 | 台湾积体电路制造股份有限公司 | Input/output pads placement for a smart card chip |
| CN202759437U (en) * | 2012-06-21 | 2013-02-27 | 上海华虹集成电路有限责任公司 | Interface circuit for dual-interface smart card |
-
2015
- 2015-06-02 CN CN201510295842.9A patent/CN104866891A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2360883Y (en) * | 1999-04-16 | 2000-01-26 | 北京富根智能电表有限公司 | IC interface anti-strong current and anti-high voltage attack modular circuit |
| US20050007744A1 (en) * | 2003-07-10 | 2005-01-13 | Yoshitaka Okita | IC module and IC card |
| CN101221629A (en) * | 2007-01-10 | 2008-07-16 | 台湾积体电路制造股份有限公司 | Input/output pads placement for a smart card chip |
| CN202759437U (en) * | 2012-06-21 | 2013-02-27 | 上海华虹集成电路有限责任公司 | Interface circuit for dual-interface smart card |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150826 |
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| RJ01 | Rejection of invention patent application after publication |