CN103543344A - Method for solving failure of capacitive screen and capacitive screen anomaly detection circuit - Google Patents
Method for solving failure of capacitive screen and capacitive screen anomaly detection circuit Download PDFInfo
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- CN103543344A CN103543344A CN201210237195.2A CN201210237195A CN103543344A CN 103543344 A CN103543344 A CN 103543344A CN 201210237195 A CN201210237195 A CN 201210237195A CN 103543344 A CN103543344 A CN 103543344A
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Abstract
The invention discloses a method for solving failure of a capacitive screen and a capacitive screen anomaly detection circuit. The method includes receiving a pulse signal outputted by the capacitive screen and transmitting the pulse signal to an anomaly signal output circuit; enabling the anomaly signal output circuit to delay and reverse the pulse signal, and then outputting the pulse signal to a HOSTCUP (host central processing unit); enabling the CPU to receive the reversed signal, judging whether the capacitive screen is abnormal or not, performing interruption processing when the capacitive screen is abnormal, and restoring the capacitive screen. The invention further provides the capacitive screen anomaly detection circuit. The method and the capacitive screen anomaly detection circuit have the advantages that parts of the circuit are added to the touch screen or a mainboard, whether the capacitive screen is abnormal or not is detected, the capacitive screen is restarted via the HOSTCUP if the capacitive screen is abnormal, then normal operation of the capacitive screen is restored, accordingly, few system resources are occupied, and burden on power consumption of an integral machine cannot be increased fundamentally; time elapsed in judging and restarting procedures is short, so that a user hardly feels the judging and restarting procedures, and the experience of the user cannot be affected.
Description
Technical field
The present invention relates to human-computer interaction technique field, relate in particular to multi-point touch capacitance plate, specifically, relate to a kind of method and capacitance plate abnormity detecting circuit that capacitance plate lost efficacy that solve.
Background technology
At present, main flow smart mobile phone and panel computer have all configured capacitance plate, although capacitance plate has high sensitivity, permeability is good, touch-control is accurate, without the advantage such as firmly pressing, but there is the shortcoming of the easy distortion of color, particularly under the environment of moist high temperature, easily there is the phenomenon of operation drift, in addition, also there is higher, the inner fragile flimsy defect of cost in capacitance touch screen.
It is emphasized that especially, capacitance touch screen have influence of magnetic field, temperature or humidity to change greatly or staff static greatly in, can often there is the temporary transient inefficacy of non-damageability, such as phone has come, but mobile phone is ringing always cannot answer operation exactly, now often need to pull out battery and again start shooting and just can make capacitance plate recover normal operation, and such frequent operation certainly will have a strong impact on user's experience.
Summary of the invention
The embodiment of the present invention provides a kind of method and capacitance plate abnormity detecting circuit that capacitance plate lost efficacy that solve, the problem while solving capacitance plate generation inefficacy.
In order to realize aforementioned goal of the invention, a kind of method that solves capacitance plate inefficacy that the embodiment of the present invention provides is achieved through the following technical solutions:
Solve the method that capacitance plate lost efficacy, described method comprises:
One abnormal signal output circuit is set, receives a pulse signal of capacitance plate output to described abnormal signal output circuit;
Described abnormal signal output circuit carries out time delay, exports to HOST CPU after oppositely described pulse signal;
Signal after CPU receives oppositely, judges whether to occur extremely, and when abnormal generation, interrupts processing, and recovers described capacitance plate.
Further, described in judge whether to occur abnormal, and when abnormal generation, interrupt processing, recover described capacitance plate and specifically comprise:
If described signal after is oppositely high level, do not do any processing, if low level is carried out abnormal interruption processing, directly power on and restart to described capacitance plate.
Further, described pulse signals is carried out time delay and is specifically comprised:
The capacitance C and the magnitude of voltage R that adjust charge-discharge circuit, make it meet following condition:
Wherein, t is for discharging and recharging the time, the low-level input voltage that VIL is negater circuit, and VCC is supply voltage.
In order to realize aforementioned goal of the invention, the embodiment of the present invention also provides a kind of capacitance plate abnormity detecting circuit, and described capacitance plate abnormity detecting circuit is to realize by following technical scheme:
An abnormity detecting circuit, described circuit comprises:
Capacitance plate MCU, abnormal signal output circuit, wherein, described abnormal signal output circuit input end connects capacitance plate MCU, and described abnormal signal output circuit output terminal connects host CPU to send look-at-me.
Further, described abnormal signal output circuit comprises:
On-off circuit, is used for detecting the pulse signal of touch-screen;
Delay circuit, is used for described pulse signal to carry out time delay, obtains time delayed signal;
Negater circuit, is used for described time delayed signal to carry out oppositely and output.
Further, described on-off circuit is a transistor circuit.
Further, described delay circuit is a RC charge-discharge circuit.
The embodiment of the present invention by increasing partial circuit on touch-screen or mainboard, whether capacitance plate is worked and detect judgement, if noted abnormalities, by HOST CPU, capacitance plate is being restarted and made it to recover normal operation without re-power in the situation that, thereby taking few system resource.In addition, this kind of scheme substantially can not increase burden to the power consumption of complete machine yet, and this judgement and the restarting process time very short, user does not substantially have to feel, can not have influence on user's experience.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is capacitance plate circuit diagram;
Fig. 2 is the condenser network schematic diagram that the embodiment of the present invention has increased abnormity detecting function;
Fig. 3 is the composition schematic diagram of embodiment of the present invention capacitance plate abnormity detecting circuit;
Fig. 4 is the composition schematic diagram of embodiment of the present invention capacitance plate abnormity detecting circuit;
Fig. 5 is the oscillogram of embodiment of the present invention capacitance plate abnormity detecting input and output;
Fig. 6 is the process flow diagram of embodiment of the present invention host CPU to capacitance plate abnormality processing.
Embodiment
In order to make the object of the embodiment of the present invention, technical scheme and advantage are clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is carried out to clear, complete description, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, be the schematic diagram of conventional touch screen circuit, take the principle of work that this figure is example paper capacitance plate, in figure, signal instruction is as follows:
I2C: be responsible for the MCU communication of host CPU and TP (touch-screen).
VDD:TP module for power supply
The MCU of RST:reset TP
The look-at-me producing when INT:TP has operation is to host CPU
As shown in Figure 1, at present, the capacitance plate of market substantially all can have a Driver IC (display panel is with driving), the MCU (microcontroller) that is equivalent to capacitance plate, and the mode that the working method of capacitance plate is generally the communication by down trigger and I2C is informed the coordinate information of the current touch of host CPU (host CPU), host CPU processes accordingly to this touch information, and shows on display screen.
But when running into, humiture changes greatly, changes of magnetic field greatly or during the unusual conditions such as ESD of staff, capacitance plate has the temporary transient inefficacy of probability, capacitance plate does not now have expendable damage.
In order to realize the capacitance plate processing of abnormal (comprise restorability abnormal or irrecoverable sexual abnormality), the embodiment of the present invention provides a kind ofly solves the method that capacitance plate lost efficacy and is achieved through the following technical solutions:
Solve the method that capacitance plate lost efficacy, described method comprises:
One abnormal signal output circuit is set, receives a pulse signal of capacitance plate output to described abnormal signal output circuit;
Described abnormal signal output circuit carries out time delay, exports to HOST CPU after oppositely described pulse signal;
Signal after CPU receives oppositely, judges whether to occur extremely, and when abnormal generation, interrupts processing, and recovers described capacitance plate.
When CPU receives abnormal signal, as shown in Figure 6, by I2C, go trial and TP to communicate, if communication OK illustrates that of short duration inefficacy just occurs TP, recovered at present normal communication, touch-screen fault is excluded, does not remake any abnormality processing.
If CPU and TP Communications failure, process that this is abnormal, restart touch-screen, again according to electrifying timing sequence, TP is powered on and makes TP recover normal operation, reattempt afterwards with touch-screen and carry out I2C communication, if communication is normal, abnormality processing is complete; If or cannot be that touch-screen carries out communication with TP, report has produced cannot repair abnormal.
As shown in Figure 2, above-mentioned abnormal in order to detect, the embodiment of the present invention designs an abnormal signal output circuit for touch screen circuitry, when the MCU of TP detects abnormal signal, export this abnormal signal TP_OUTPUT, so that this abnormal signal is passed to HOST CPU, this signal is low effectively, makes HOST CPU extremely make corresponding subsequent treatment to this.When the MCU of TP detect TP in the regular hour without when response, can produce a low signal and give host CPU; Host CPU detects after this signal step-down, knows that TP occurs abnormal, and meeting reset TP, powers on to TP according to electrifying timing sequence again.
As shown in Figure 3, this abnormal signal output circuit comprises:
On-off circuit, is used for detecting the pulse signal of touch-screen;
Delay circuit, is used for described pulse signal to carry out time delay, obtains time delayed signal;
Negater circuit, is used for described time delayed signal to carry out oppositely and output.
The concrete composition that is illustrated in figure 4 this abnormal signal output circuit, is described as follows:
Input: signal comes in the MCU of TP, is a pulse signal.
Output: be the output signal of not gate, be connected with host MCU.
The triode switch of T1:PNP
SN74AHC1G04: not gate device, negater circuit
The abnormal signal of this abnormal signal output circuit output TP, preferably duty is as following table:
In conjunction with upper table, its principle of work is as follows:
1. when TP works, the MCU of TP sends a periodic pulse signal output to the base stage of switch triode, opens 3V power supply simultaneously.The recurrent pulse of 1ms of take is example, also every 1ms, sends the low pulse signal of a 0.1ms.
0.9ms before low pulse arrives, output is high, now PNP cut-off, the power supply of 3V by R1 and C1 to capacitor charging, now A point can not jump to high level quickly, jumping to the high time is determined by the value of R1 and C1, can require to set charging (or electric discharge) time according to concrete product design.
For example, the voltage of ordering by the value control A of adjustment R1 and C1 is lower than the VIL=0.9V of U1 within the time of 0.9ms, and, the in the situation that of t=0.9ms, the value of adjusting R1, C1 makes it meet following relation:
Now the pin2 of U1 is low level, and after being undertaken oppositely by negater circuit, what export to host CPU is high level.When the low pulse of 0.1ms arrives, T1 opens electric capacity and discharges rapidly, and now the pin2 of U1 is low.What export to host CPU is high level.
2, during TP abnormal work:
High level makes T1 cut-off, and the power supply of 3V is directly to C1 charging, reaches the pin2 of U1 after certain hour and becomes high level, and the now output of U1 becomes low, and host CPU receives a low pulse signal.
In conjunction with the oscillogram as Fig. 5, know: when TP works, TP output is high to host CPU always, does not receive the abnormal signal of interruption, when TP is in abnormal time, TP Output is low level to the signal of host CPU, at this moment produces abnormal look-at-me.
When CPU receives abnormal signal, as shown in Figure 6, by I2C, go trial and TP to communicate, if communication OK illustrates that of short duration inefficacy just occurs TP, recovered at present normal communication, touch-screen fault is excluded, does not remake any abnormality processing.
If CPU and TP Communications failure, process that this is abnormal, restart touch-screen, again according to electrifying timing sequence, TP is powered on and makes TP recover normal operation, reattempt afterwards with touch-screen and carry out I2C communication, if communication is normal, abnormality processing is complete; If or cannot be that touch-screen carries out communication with TP, report has produced cannot repair abnormal.
The embodiment of the present invention by increasing partial circuit on touch-screen or mainboard, whether capacitance plate is worked and detect judgement, if noted abnormalities, by HOST CPU, capacitance plate is being restarted and made it to recover normal operation without re-power in the situation that, thereby taking few system resource.In addition, this kind of scheme substantially can not increase burden to the power consumption of complete machine yet, and this judgement and the restarting process time very short, user does not substantially have to feel, can not have influence on user's experience.
Those skilled in the art will recognize that; above-mentioned embodiment is exemplary; in order to make those skilled in the art can better understand this patent content; should not be understood as the restriction to this patent protection domain; so long as disclose spiritual do any according to this patent, be equal to change or modify, all falling into this patent protection domain.
Claims (7)
1. solve the method that capacitance plate lost efficacy, it is characterized in that, described method comprises:
One abnormal signal output circuit is set, receives a pulse signal of capacitance plate output to described abnormal signal output circuit;
Described abnormal signal output circuit carries out time delay, exports to HOST CPU after oppositely described pulse signal;
Signal after CPU receives oppositely, judges whether to occur extremely, and when abnormal generation, interrupts processing, and recovers described capacitance plate.
2. the method that solution capacitance plate as claimed in claim 1 lost efficacy, is characterized in that, described in judge whether to occur abnormal, and when abnormal generation, interrupt processing, recover described capacitance plate and specifically comprise:
If described signal after is oppositely high level, do not do any processing, if low level is carried out abnormal interruption processing, directly power on and restart to described capacitance plate.
3. the method that solution capacitance plate as claimed in claim 1 lost efficacy, is characterized in that, described pulse signals is carried out time delay and specifically comprised:
The capacitance C and the magnitude of voltage R that adjust charge-discharge circuit, make it meet following condition:
Wherein, t is for discharging and recharging the time, the low-level input voltage that VIL is negater circuit, and VCC is supply voltage.
4. a capacitance plate abnormity detecting circuit, is characterized in that, described circuit comprises:
Capacitance plate MCU, abnormal signal output circuit, wherein, described abnormal signal output circuit input end connects capacitance plate MCU, and described abnormal signal output circuit output terminal connects host CPU to send look-at-me.
5. capacitance plate abnormity detecting circuit as claimed in claim 4, is characterized in that, described abnormal signal output circuit comprises:
On-off circuit, is used for detecting the pulse signal of touch-screen;
Delay circuit, is used for described pulse signal to carry out time delay, obtains time delayed signal;
Negater circuit, is used for described time delayed signal to carry out oppositely and output.
6. capacitance plate abnormity detecting circuit as claimed in claim 5, is characterized in that, described on-off circuit is a transistor circuit.
7. capacitance plate abnormity detecting circuit as claimed in claim 5, is characterized in that, described delay circuit is a RC charge-discharge circuit.
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| CN201210237195.2A CN103543344B (en) | 2012-07-10 | 2012-07-10 | A kind of method solving capacitance plate inefficacy and capacitance plate abnormity detecting circuit |
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| CN201210237195.2A CN103543344B (en) | 2012-07-10 | 2012-07-10 | A kind of method solving capacitance plate inefficacy and capacitance plate abnormity detecting circuit |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104023139A (en) * | 2014-06-19 | 2014-09-03 | 深圳市中兴移动通信有限公司 | Mobile terminal and abnormality processing method thereof |
| CN105739767A (en) * | 2016-01-28 | 2016-07-06 | 厦门雅迅网络股份有限公司 | Method for automatically recovering function failures of touch screens |
| CN106547667A (en) * | 2015-09-16 | 2017-03-29 | 比亚迪股份有限公司 | A kind of fault cues method and system of mobile terminal |
| CN107861818A (en) * | 2017-11-30 | 2018-03-30 | 努比亚技术有限公司 | Internal memory method for cleaning, mobile terminal and storage medium based on TP and LCD |
| CN108268167A (en) * | 2016-12-30 | 2018-07-10 | 乐金显示有限公司 | Touch display unit |
| CN108833687A (en) * | 2018-05-29 | 2018-11-16 | 努比亚技术有限公司 | Terminal prot open method, terminal and computer readable storage medium |
| WO2019052050A1 (en) * | 2017-09-13 | 2019-03-21 | 广州视源电子科技股份有限公司 | Touch display system |
| CN113110758A (en) * | 2021-04-19 | 2021-07-13 | Tcl通讯（宁波）有限公司 | Method and system for processing touch failure of touch screen during startup and intelligent terminal |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000030495A (en) * | 1998-05-25 | 2000-01-28 | Hyundai Electron Ind Co Ltd | Fully on-chip wafer level burn-in test circuit and method thereof |
| JP2003167545A (en) * | 2001-11-30 | 2003-06-13 | Sharp Corp | Method for detecting abnormality of image display signal, and image display device |
| WO2009116214A1 (en) * | 2008-03-19 | 2009-09-24 | シャープ株式会社 | Display panel driving circuit, liquid crystal display device, shift register, liquid crystal panel, and display device driving method |
| CN101976161A (en) * | 2010-07-27 | 2011-02-16 | 苏州瀚瑞微电子有限公司 | Method for detecting capacitive touch screen |
-
2012
- 2012-07-10 CN CN201210237195.2A patent/CN103543344B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000030495A (en) * | 1998-05-25 | 2000-01-28 | Hyundai Electron Ind Co Ltd | Fully on-chip wafer level burn-in test circuit and method thereof |
| JP2003167545A (en) * | 2001-11-30 | 2003-06-13 | Sharp Corp | Method for detecting abnormality of image display signal, and image display device |
| WO2009116214A1 (en) * | 2008-03-19 | 2009-09-24 | シャープ株式会社 | Display panel driving circuit, liquid crystal display device, shift register, liquid crystal panel, and display device driving method |
| CN101976161A (en) * | 2010-07-27 | 2011-02-16 | 苏州瀚瑞微电子有限公司 | Method for detecting capacitive touch screen |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104023139B (en) * | 2014-06-19 | 2020-05-15 | 陈惠金 | Mobile terminal and exception handling method thereof |
| CN104023139A (en) * | 2014-06-19 | 2014-09-03 | 深圳市中兴移动通信有限公司 | Mobile terminal and abnormality processing method thereof |
| CN106547667A (en) * | 2015-09-16 | 2017-03-29 | 比亚迪股份有限公司 | A kind of fault cues method and system of mobile terminal |
| CN106547667B (en) * | 2015-09-16 | 2020-05-22 | 比亚迪股份有限公司 | Fault prompting method and system for mobile terminal |
| CN105739767A (en) * | 2016-01-28 | 2016-07-06 | 厦门雅迅网络股份有限公司 | Method for automatically recovering function failures of touch screens |
| CN108268167B (en) * | 2016-12-30 | 2021-03-30 | 乐金显示有限公司 | Touch display device |
| CN108268167A (en) * | 2016-12-30 | 2018-07-10 | 乐金显示有限公司 | Touch display unit |
| WO2019052050A1 (en) * | 2017-09-13 | 2019-03-21 | 广州视源电子科技股份有限公司 | Touch display system |
| CN107861818A (en) * | 2017-11-30 | 2018-03-30 | 努比亚技术有限公司 | Internal memory method for cleaning, mobile terminal and storage medium based on TP and LCD |
| CN107861818B (en) * | 2017-11-30 | 2022-01-14 | 努比亚技术有限公司 | Memory cleaning method based on TP and LCD, mobile terminal and storage medium |
| CN108833687A (en) * | 2018-05-29 | 2018-11-16 | 努比亚技术有限公司 | Terminal prot open method, terminal and computer readable storage medium |
| CN113110758A (en) * | 2021-04-19 | 2021-07-13 | Tcl通讯（宁波）有限公司 | Method and system for processing touch failure of touch screen during startup and intelligent terminal |
| CN113110758B (en) * | 2021-04-19 | 2023-01-20 | 惠州Tcl云创科技有限公司 | Method and system for processing touch failure of touch screen during startup and intelligent terminal |
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