CN108054742A - One kind is used for TP anti-static protection circuits - Google Patents
One kind is used for TP anti-static protection circuits Download PDFInfo
- Publication number
- CN108054742A CN108054742A CN201711395128.2A CN201711395128A CN108054742A CN 108054742 A CN108054742 A CN 108054742A CN 201711395128 A CN201711395128 A CN 201711395128A CN 108054742 A CN108054742 A CN 108054742A
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- diode
- circuits
- circuit
- signal
- electrostatic
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
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- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention provides one kind for TP anti-static protection circuits, including TP signal circuits and power circuit, the power circuit provides power supply for the signal that the TP signal circuits export；Increase resistance R1, diode D1, diode D2 composition protection circuits on TP signal circuits；Increase diode D3, diode D4 composition protection circuit on power circuit；Wherein, signal circuit controls IC and master control communicating circuit for TP, and power circuit controls IC power supply circuits for TP；An excellent electrostatic discharge protective circuit of performance simple in structure is thusly-formed, it is versatile.
Description
Technical field
The invention belongs to TP design fields, and in particular, to one kind is used for TP anti-static protection circuits.
Background technology
With the fast development of science and technology, the continuous renewal of technology, the raising of living standards of the people, electronic equipment is more and more general
And capacitive touch screen in every profession and trade using more and more extensive.It is seen everywhere, threat of the ubiquitous electrostatic to electronic product
Greatly, as shown in Figure 1, TP is threatened in production process and subsequent terminal using the upper electrostatic that faces at any time, failure is gently then temporarily touched,
Heavy then directly contribute damage of product, extreme influence user experience reduces product reliability.
The content of the invention
It is a kind of for TP antistatic protections electricity it is an object of the invention in view of the above shortcomings of the prior art, provide
Road can be universally used in the circuit design of all TP, it is easy to accomplish, of low cost, practicability is extremely strong.
To achieve the above object, present invention employs following technical solutions：
The present invention provides one kind for TP anti-static protection circuits, including TP signal circuits and power circuit, the electricity
Source circuit provides power supply for the signal that the TP signal circuits export；
The TP signal circuits include resistance R1, diode D1 and diode D2, the first pin of the resistance R1 are connected on
TP inserted terminals, the second pin of the resistance R1 are connected to the first end of the IC circuits, and the anode of the diode D1 is connected on institute
In the second pin for stating resistance R1, the cathode of the diode D1 is connected on the cathode of the diode D2, the diode D2
Anode be connected on TP rings on the ground.
Further, the power circuit includes diode D3 and diode D4, and the anode of the diode D3, which is connected on, to be protected
On the power cord of shield, the cathode of the diode D3 is connected on the cathode of the diode D4, and the anode of the diode D4 connects
In TP rings on the ground.
Further, when electrostatic enters TP circuits, the surge of the TP signal circuits and power circuit absorption electrostatic,
The diode D1 and diode D2, the diode D3 and the diode D4 are respectively formed clamp circuit, to prevent
The normal work of electrostatic interference TP.
Further, the Standard resistance range of the resistance R1 is 10 ohm to 100 ohm.
Beneficial effects of the present invention are：Increase resistance R1, diode D1, diode D2 composition protection electricity on TP signal circuits
Road；Increase diode D3, diode D4 composition protection circuit on power circuit；Wherein, signal circuit controls IC and master control for TP
Communicating circuit, power circuit control IC power supply circuits for TP；It is thusly-formed the excellent electrostatic protection electricity of a performance simple in structure
Road, it is versatile.
Description of the drawings
Fig. 1 is the TP circuit diagrams of the prior art；
Fig. 2 is the TP circuit diagrams for increasing protection circuit.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
It is referring to Fig. 2, a kind of for TP anti-static protection circuits, including TP signal circuits and power circuit, the power supply
Circuit provides power supply for the signal that the TP signal circuits export；
The TP signal circuits include resistance R1, diode D1 and diode D2, the first pin of the resistance R1 are connected on
TP inserted terminals, the second pin of the resistance R1 are connected to the first end of the IC circuits, and the anode of the diode D1 is connected on institute
In the second pin for stating resistance R1, the cathode of the diode D1 is connected on the cathode of the diode D2, the diode D2
Anode be connected on TP rings on the ground.
The power circuit includes diode D3 and diode D4, the anode of the diode D3 are connected on protected power supply
On line, the cathode of the diode D3 is connected on the cathode of the diode D4, and the anode of the diode D4 is with being connected on TP rings
On；It is thusly-formed an excellent electrostatic discharge protective circuit of performance simple in structure.
Wherein, resistance R1, diode D1, diode D2 composition protection circuits are increased on existing TP signal circuits, in electricity
Increase diode D3, diode D4 composition protection circuit in source circuit, signal circuit controls IC and master control communicating circuit, electricity for TP
Source circuit controls IC power supply circuits for TP.Protected signal wire or power cord are connected and are connected in parallel on respectively to resistance and diode
On.
When electrostatic enters TP circuits, the surge of the TP signal circuits and power circuit absorption electrostatic, described two
The pole pipe D1 and diode D2, the diode D3 and the diode D4 are respectively formed clamp circuit, to prevent electrostatic from doing
Disturb the normal work of TP.
The Standard resistance range of the resistance R1 is 10 ohm to 100 ohm, and it is normal so can to influence TP to avoid series resistance
Communication can also play metering function, to prevent into TPIC electric currents are excessive IC internal circuits being caused to fail.
TP is during production or use, when there is electrostatic influence in the external world, does not do the TP of antistatic protection, electrostatic meeting
Enter via signal wire or power cord inside IC, because the loop resistance of IC release electrostatics is usually smaller, can not limit quiet
Discharge of electricity electric current, excessive electric current can cause the damage of IC internal circuits to lose function.
In consideration of it, of the invention connect a resistance to limit into inside IC on TP inserted terminals to the signal wire between IC
Electric current, the diode D1, diode D2 form a two-way protection circuit, when TP is worked normally, due to diode
One-way conduction characteristic, this protection circuit is in cut-off off position, when TP is subject to extraneous high-pressure electrostatic to disturb, this protection
Circuit will ON operation, if the electrostatic of positive polarity, then diode D1 conducting, diode D2 reverse breakdowns absorb electrostatic
It releases energy, electrostatic potential is clamped down in safe range, if the electrostatic of negative polarity, then diode D2 is turned on, diode D1
Reverse breakdown absorbs Electro-static Driven Comb energy, and electrostatic potential is clamped down in safe range, in this way, either the electrostatic of positive polarity is also
Be negative polarity electrostatic all by by this circuit limit its be added to by protection IC signal pins voltage, so as to play a protective role,
Ensure that the communication line of TP and master control is normal.
The bidirectional protective circuit of diode D3, diode D4 composition is connected in parallel on TP power circuits, when TP is worked normally,
Due to the one-way conduction characteristic of diode, this protection circuit is in cut-off off position, when TP is subject to extraneous high-pressure electrostatic to do
When disturbing, this protection circuit will ON operation, if the electrostatic of positive polarity, then diode D3 turn on, diode D4 reverse breakdowns
Electro-static Driven Comb energy is absorbed, electrostatic potential is clamped down in safe range, if the electrostatic of negative polarity, then diode D4 is turned on,
Diode D3 reverse breakdowns absorb Electro-static Driven Comb energy, electrostatic potential are clamped down in safe range, in this way, either positive polarity
Electrostatic or negative polarity electrostatic all will by this circuit limit its be added to by protection IC signal pins voltage, so as to play protect
Shield acts on, it is ensured that the simulation working power voltage of TPIC is stablized, and TP is protected, protects it from electrostatic interference.
Embodiment described above only expresses embodiments of the present invention, and description is more specific and detailed, but can not
Therefore it is interpreted as the limitation to the scope of the claims of the present invention.It should be pointed out that for those of ordinary skill in the art,
Without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection model of the present invention
It encloses.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (4)
1. one kind is used for TP anti-static protection circuits, it is characterised in that：Including TP signal circuits and power circuit, the power supply electricity
Road provides power supply for the signal that the TP signal circuits export；
The TP signal circuits include resistance R1, diode D1 and diode D2, the first pin of the resistance R1 are connected on TP and insert
End is connect, the second pin of the resistance R1 is connected to the first end of the IC circuits, and the anode of the diode D1 is connected on the electricity
In the second pin for hindering R1, the cathode of the diode D1 is connected on the cathode of the diode D2, the sun of the diode D2
Pole is connected on TP rings on the ground.
It is 2. according to claim 1 a kind of for TP anti-static protection circuits, it is characterised in that：The power circuit includes
Diode D3 and diode D4, the anode of the diode D3 are connected on protected power cord, the cathode of the diode D3
It is connected on the cathode of the diode D4, the anode of the diode D4 is connected on TP rings on the ground.
It is 3. according to claim 2 a kind of for TP anti-static protection circuits, it is characterised in that：When electrostatic enters TP circuits
When, the TP signal circuits and the power circuit absorb the surge of electrostatic, the diode D1 and the diode D2, described
Diode D3 and the diode D4 are respectively formed clamp circuit, to prevent the normal work of electrostatic interference TP.
It is 4. according to claim 1 a kind of for TP anti-static protection circuits, it is characterised in that：The resistance value of the resistance R1
Scope is 10 ohm to 100 ohm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711395128.2A CN108054742A (en) | 2017-12-21 | 2017-12-21 | One kind is used for TP anti-static protection circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711395128.2A CN108054742A (en) | 2017-12-21 | 2017-12-21 | One kind is used for TP anti-static protection circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108054742A true CN108054742A (en) | 2018-05-18 |
Family
ID=62131273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711395128.2A Pending CN108054742A (en) | 2017-12-21 | 2017-12-21 | One kind is used for TP anti-static protection circuits |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108054742A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006100532A (en) * | 2004-09-29 | 2006-04-13 | Toshiba Corp | Electrostatic protective circuit |
| CN101453116A (en) * | 2007-12-06 | 2009-06-10 | 鸿富锦精密工业（深圳）有限公司 | Chip protection circuit and electronic device |
| CN101958538A (en) * | 2010-04-07 | 2011-01-26 | 苏州佳世达光电有限公司 | Circuit protection system |
| CN103066581A (en) * | 2011-10-19 | 2013-04-24 | 北京谊安医疗系统股份有限公司 | Medical air supply system and electrostatic protection circuit of communication circuit thereof |
| CN102280872B (en) * | 2011-08-10 | 2014-04-09 | 上海山景集成电路股份有限公司 | Electrostatic-proof protection circuit |
-
2017
- 2017-12-21 CN CN201711395128.2A patent/CN108054742A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006100532A (en) * | 2004-09-29 | 2006-04-13 | Toshiba Corp | Electrostatic protective circuit |
| CN101453116A (en) * | 2007-12-06 | 2009-06-10 | 鸿富锦精密工业（深圳）有限公司 | Chip protection circuit and electronic device |
| CN101958538A (en) * | 2010-04-07 | 2011-01-26 | 苏州佳世达光电有限公司 | Circuit protection system |
| CN102280872B (en) * | 2011-08-10 | 2014-04-09 | 上海山景集成电路股份有限公司 | Electrostatic-proof protection circuit |
| CN103066581A (en) * | 2011-10-19 | 2013-04-24 | 北京谊安医疗系统股份有限公司 | Medical air supply system and electrostatic protection circuit of communication circuit thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180518 |
|
| RJ01 | Rejection of invention patent application after publication |