CN103294289B - The capacitance touch control system of tool automatic calibration and method - Google Patents
The capacitance touch control system of tool automatic calibration and method Download PDFInfo
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- CN103294289B CN103294289B CN201210054822.9A CN201210054822A CN103294289B CN 103294289 B CN103294289 B CN 103294289B CN 201210054822 A CN201210054822 A CN 201210054822A CN 103294289 B CN103294289 B CN 103294289B
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Abstract
The invention relates to a kind of capacitance touch control system and method for tool automatic calibration.Driving signal generator sequentially provides drive singal to the first electrode, and produces multiple induced signal at the second electrode.Induced signal receiver receives and processes described induced signal.Multiple touch point is not being measured in advance by the induced signal under the state of touching and is being stored in initial value generator, beginning during each is measured, initial value generator according to the induced signal prestored to produce the initial value of the induced signal of described second electrode, and be supplied to induced signal receiver, in order to carry out initialization to it.
Description
Technical field
The present invention is relevant a kind of touch technology, particularly about a kind of capacitance touch control system and method for tool automatic calibration.
Background technology
Contact panel (touchpanel) can become Touch Screen in conjunction with display screen, its general input interface as electronic installation, touches input in order to detect in viewing area.The touch technology that contact panel uses has multiple, such as condenser type, resistance-type or optical profile type, and wherein, capacitive touch control techniques is the main flow of current touch technology.
Capacitance type touch-control panel is generally made up of horizontal electrode and vertical electrode, and namely described electrodes interdigitate place defines touch point.When operating contact panel, between two electrodes at touch point place, be formed with electric field.When pointing contact surface plate, the electric field of meeting stop portions, causes the reduction of this place's capacitance.Utilize the change of this capacitance, can in order to detect the position of touch points.
But due to the otherness of technique or assembling, the electrical specification of each touch point of capacitance type touch-control panel is not identical.Described otherness possibly follow-up carry out signal transacting (such as signal amplification) time, signal value enters the saturation region of electronic component, makes cannot distinguish between the signal of each touch point, thus causes the mistake of touch detection.
Therefore, need the capacitance touch control system and method that propose a kind of novelty badly, in order to the otherness between the above-mentioned touch point of automatic calibration, to promote the accuracy of touch detection.
As can be seen here, above-mentioned existing contact panel is at method, product structure and use, and obviously still has inconvenience and defect, and is urgently further improved.Therefore how to found a kind of capacitance touch control system and method for new tool automatic calibration, also become the target that current industry pole need be improved.
Summary of the invention
The object of the invention is to, overcome the defect that existing contact panel exists, and a kind of capacitance touch control system and method for new tool automatic calibration are provided, technical matters to be solved makes it before the reception process carrying out signal, first carry out initialization with the initial value of pre-stored, avoid the induced signal after processing to cause saturated, thus promoted the accuracy of detecting, be very suitable for practicality.
The object of the invention to solve the technical problems realizes by the following technical solutions.The capacitance touch control system of a kind of tool automatic calibration proposed according to the present invention, wherein comprise: multiple first electrode and multiple second electrode, the infall of described first electrode and the second electrode defines multiple touch point; One driving signal generator, it sequentially provides drive singal to described first electrode, and this drive singal is produced multiple induced signal and lays respectively at described second electrode by this first electrode driven by capacitance coupling effect; One induced signal receiver, receives and processes described induced signal; One position detector, it according to this first electrode driven and described induced signal, determines to detect the position touched a little during each is measured; And an initial value generator, at least partly this touch point is not being measured in advance by the induced signal under the state of touching and is being stored in this initial value generator, beginning during each is measured, this initial value generator according to the induced signal prestored to produce the initial value of the induced signal of described second electrode, and be supplied to this induced signal receiver, in order to carry out initialization to it.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The capacitance touch control system of aforesaid tool automatic calibration, wherein said induced signal receiver comprises multiple integrator, and its input end is electrically coupled to described second electrode respectively, and its output is fed to this position detector.
The capacitance touch control system of aforesaid tool automatic calibration, wherein said integrator comprises: an amplifier; One integrating condenser, is controllably electrically coupled between the input end of this amplifier and output terminal; And at least one integral restrictor and at least one initial switch, when carrying out integration, this integral restrictor makes this integrating condenser be electrically coupled between the input end of this amplifier and output terminal, in order to obtain integration induced signal; When carrying out initialization, this initial switch makes this integrating condenser electric property coupling between this initial value generator and a reference potential, in order to carry out precharge (pre-charge) to this integrator to perform initialization.
The capacitance touch control system of aforesaid tool automatic calibration, wherein said amplifier comprises an operational amplifier, and its reverse input end and output terminal are controllably coupled to the two ends of this integrating condenser.
The capacitance touch control system of aforesaid tool automatic calibration, wherein said initial value generator comprises: an initial value form, and it stores the initial value of described touch point at least partially; One digital to analog converter (DAC), after this initial value being converted to simulation pattern, is fed to the described integrator of this induced signal receiver, successively to carry out the initialization of described integrator; And a controller, in order to this initial value is fed to this digital to analog converter.
The capacitance touch control system of aforesaid tool automatic calibration, the wherein said initial value not being stored in the touch point of this initial value form is obtained through interpolative operation by the initial value of this controller according to this storage.
The capacitance touch control system of aforesaid tool automatic calibration, wherein said initial value form is stored in a Nonvolatile memory.
The capacitance touch control system of aforesaid tool automatic calibration, wherein said induced signal receiver more comprises a circuit, in order to obtain the induced signal difference of this second electrode adjacent, to be fed to this integrator.
The object of the invention to solve the technical problems also realizes by the following technical solutions.The capacitive touch control method of a kind of tool automatic calibration proposed according to the present invention, wherein comprises: (a) provides multiple first electrode and multiple second electrode, and the infall of described first electrode and the second electrode defines multiple touch point; B () sequentially provides drive singal to described first electrode, this drive singal is produced multiple induced signal and lays respectively at described second electrode by this first electrode driven by capacitance coupling effect; C () receives and processes described induced signal; D (), during each is measured, according to this first electrode driven and described induced signal, determines to detect the position touched a little; E () is measured in advance and is stored to this touch point of small part not by the induced signal under the state of touching; And (f) beginning during each is measured, according to the induced signal prestored to produce the initial value of the induced signal of described second electrode, in order to carry out the initialization of integration.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The capacitive touch control method of aforesaid tool automatic calibration, wherein said step (c) comprises multiple integration step, its respectively the second electrode described in electric property coupling to input this induced signal, after integration, integral result is supplied to step (d).
The capacitive touch control method of aforesaid tool automatic calibration, wherein said integration step more comprises: when carrying out initialization, carries out precharge (pre-charge) to perform the initialization of integration.
The capacitive touch control method of aforesaid tool automatic calibration, wherein said step (e) comprises: use an initial value form, to store the initial value of described touch point at least partially.
The capacitive touch control method of aforesaid tool automatic calibration, wherein said step (f) comprises: after this initial value being converted to simulation pattern, carry out the initialization of integration successively.
The capacitive touch control method of aforesaid tool automatic calibration, wherein said more comprises: according to the initial value of this storage, after interpolative operation, not to be stored in the initial value of the touch point of this initial value form.
The capacitive touch control method of aforesaid tool automatic calibration, wherein said initial value form is stored in a Nonvolatile memory.
The capacitive touch control method of aforesaid tool automatic calibration, wherein said more comprises a step, in order to obtain the induced signal difference of this second electrode adjacent, to be supplied to this integration step.
The object of the invention to solve the technical problems also realizes in addition by the following technical solutions.The circuit for detecting of a kind of tool automatic calibration proposed according to the present invention, wherein comprises: a signal receiver, has at least one detector, and each during at least one measurement of each detector detects a signal during measuring; One initial value generator, measure in advance and be stored to the initial value during each during at least one measurement of small part detector is measured, beginning during each measurement, this initial value generator is supplied to this signal receiver, in order to carry out initialization to it according to the initial value prestored.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The circuit for detecting of aforesaid tool automatic calibration, wherein said each initial value prestored stores in digital form, and be supplied to this signal receiver with simulating signal.
The circuit for detecting of aforesaid tool automatic calibration, the initial value that each during at least one measurement of wherein said at least part of detector prestores during measuring is this signal generation according to the detecting during corresponding measurement of corresponding detector.
The circuit for detecting of aforesaid tool automatic calibration, wherein said initial value generator is the initial value during each during at least one measurement of pre-nonresident portion detector is measured, and be the initial value that interpolative operation is not stored in the touch point of this initial value form, to be supplied to this induced signal receiver.
The present invention compared with prior art has obvious advantage and beneficial effect.From above technical scheme, main technical content of the present invention is as follows: according to the embodiment of the present invention, and capacitance touch control system comprises multiple first electrode and multiple second electrode, driving signal generator, induced signal receiver, position detector and initial value generator.The infall of described first electrode and the second electrode defines multiple touch point.Driving signal generator sequentially provides drive singal to described first electrode, and drive singal is produced multiple induced signal and lays respectively at described second electrode by driven first electrode by capacitance coupling effect.Induced signal receiver receives and processes described induced signal.Position detector, during each is measured, according to driven first electrode and described induced signal, determines to detect the position touched a little.At least part of touch point is not being measured in advance by the induced signal under the state of touching and is being stored in initial value generator, beginning during each is measured, this initial value generator according to the induced signal prestored to produce the initial value of the induced signal of described second electrode, and be supplied to induced signal receiver, in order to carry out initialization to it.The circuit for detecting of tool automatic calibration provided by the invention, comprises a signal receiver and an initial value generator.Signal receiver has at least one detector, and each during at least one measurement of each detector detects a signal during measuring.In addition, initial value generator is measured in advance and is stored to the initial value during each during at least one measurement of small part detector is measured, beginning during each is measured, initial value generator is supplied to signal receiver, in order to carry out initialization to it according to the initial value prestored.The circuit for detecting of tool automatic calibration provided by the invention can be store initial value in digital form, and is supplied to signal receiver with simulating signal, to carry out initialization.Therefore initialization can be carried out in the mode of programmable to signal receiver, the initialization during each measurement of dynamic conditioning.
By technique scheme, capacitance touch control system and the method for tool automatic calibration of the present invention at least have following advantages and beneficial effect: before the reception process carrying out signal, first carry out initialization with the initial value of pre-stored, avoid the induced signal after processing to cause saturated, thus promoted the accuracy of detecting.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to technological means of the present invention can be better understood, and can be implemented according to the content of instructions, and can become apparent to allow above and other objects of the present invention, feature and advantage, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, be described in detail as follows.
Accompanying drawing explanation
Fig. 1 shows the functional-block diagram of the capacitance touch control system of the tool automatic calibration of the embodiment of the present invention.
Fig. 2 shows the induced signal receiver of Fig. 1 and the thin portion circuit of initial value generator and block scheme.
Fig. 3 A figure shows the thin portion circuit diagram of the induced signal receiver of another embodiment of the present invention.
Fig. 3 B shows the correlation timing figure of Fig. 3 A.
11: driving signal generator
12: induced signal receiver
121: integrator
1211: amplifier
1211A: the first amplifier
1211B: the second amplifier
13: position detector
14: initial value generator
141: initial value form
142: controller
143: digital to analog converter (DAC)
Embodiment
For further setting forth the present invention for the technological means reaching predetermined goal of the invention and take and effect, below in conjunction with accompanying drawing and preferred embodiment, to capacitance touch control system and its embodiment of method, method, step, structure, feature and effect thereof of the tool automatic calibration proposed according to the present invention, be described in detail as follows.
Fig. 1 shows the functional-block diagram of the capacitance touch control system of the tool automatic calibration of the embodiment of the present invention.In the present embodiment, the capacitance touch control system (hereinafter referred to as touch-control system) of tool automatic calibration comprises the second electrode Rx0-Rxn of multiple horizontal the first electrode Tx0-Txn and multiple homeotropic alignment, wherein the first electrode Tx0-Txn and the second electrode Rx0-Rxn is at a distance of a predeterminable range, and thus each touch point intersected forms an electric capacity.Touch-control system also comprises a driving signal generator 11, and it sequentially provides drive singal to described first electrode Tx0-Txn, and described drive singal is generally AC signal, such as pulse wave signal, can be square wave or string ripple.In a certain period, drive singal can be produced induced signal at described second electrode Rx0-Rxn by driven first electrode Tx by capacitance coupling effect, and described induced signal is undertaken receiving by an induced signal receiver 12 again and processes.Now, if driven first electrode Tx pointed or the touching of conductive body (such as pointer), namely can have influence on the electric field of corresponding touch point, thus produce abnormal induced signal on the second electrode Rx of relevant position.Above-mentioned a certain first electrode Tx is driven and described second electrode Rx0-Rxn produces induced signal, during forming a measurement.During each is measured, touch-control system uses a position detector 13, such as microprocessing unit (MCU), and it is according to the second electrode Rx corresponding to driving first electrode Tx and abnormal induced signal, to detect the position determining to touch a little.Such as, the induced signal before not touched depending on comparison and touched time the variable quantity of abnormal induced signal decide the position touched a little, as obtained barycenter (centroid) position.
According to one of feature of the embodiment of the present invention, consider the different capacitive coupling that each touch point causes because of technique or assembling otherness, inconsistent impact can be formed to the induced signal of each touch point, therefore, the present embodiment in advance (before such as dispatching from the factory) measures each touch point not by the induced signal under the state of touching, and is stored by measured induced signal (being such as stored in a Nonvolatile memory).When touch-control system is in practical operation, beginning during each measurement, initial value generator 14 to produce the initial value of the induced signal of each the second electrode Rx0-Rxn, and is supplied to induced signal receiver 12, in order to carry out initialization to induced signal receiver 12 according to the signal that prestores.After the second electrode Rx0-Rxn produces induced signal, namely this induced signal is subject to the compensation of this initial value, thus makes each touch point be corrected.For example, before dispatching from the factory, to obtain induced signal through the initial value of integration be 1 volt to a certain touch point not measured under the state of touching.When touch-control system is in practical operation, initial value generator 14 provides-1 volt to induced signal receiver 12.After the corresponding second electrode Rx of this touch point produces induced signal, namely this induced signal can be subject to the compensation correction of this initial value (-1 volt).Aforementioned initial value can be on the occasion of or negative value.
Fig. 2 shows the induced signal receiver 12 of Fig. 1 and the thin portion circuit of initial value generator 14 and block scheme.In the present embodiment, induced signal receiver 12 comprises multiple integrator 121, and electric property coupling is from multiple second electrode Rx0-Rxn (or being called passage) respectively in its input, and its output is then fed to position detector 13 (not being shown in Fig. 2).In details of the words, integrator 121 formed primarily of amplifier 1211 and integrating condenser C.Amplifier 1211 can be operational amplifier, but is not limited to this.Integrating condenser C controllably (controllably) is electrically coupled to (oppositely) of amplifier 1211 between input end and output terminal.Integrator 121 also comprises multiple integral restrictor w and initial switch c.As shown in the figure, when carrying out integration, integral restrictor w can close and initial switch c is off (being such as controlled by a microprocessing unit), integrating condenser C is made to be electrically coupled to (oppositely) of amplifier 121 between input end and output terminal, in order to obtain integration induced signal; When carrying out initialization, integral restrictor w can disconnect and initial switch c is closed, integrating condenser C is made to be electrically coupled between initial value generator 14 and a reference potential (such as ground connection), in order to carry out precharge (pre-charge) to perform initialization to integrator 121.It should be noted that, when carrying out initialization, electric charge charges from integrating condenser C near the electrode of amplifier 121 output terminal, and when carrying out integration, electric charge is then charge from integrating condenser C near the electrode of amplifier 121 (oppositely) input end.Whereby, for the integration induced signal that integrator 121 produces, when integrator 121 carries out initialization according to the initial value that initial value generator 14 provides, the negative value of this initial value will be produced in fact.In addition, before carrying out initialization, Resetting Switching (be not shown in graphic in) can generally also be used, in order to by the charge discharge (discharge) in integrating condenser C.
In the present embodiment, initial value generator 14 mainly comprises an initial value form 141, can be stored in an internal memory, such as Nonvolatile memory.In an example, initial value form 141 stores the initial value of all touch points of touch-control system.In another example, for each the second electrode Rx (or passage) the touch point of corresponding first electrode Tx0-Txn, the initial value of initial value form 141 only storage compartment touch point, such as, to be separated by between the touch point stored at least one touch point, as odd number first electrode (Tx1, Tx3 ...) touch point.As for the initial value of touch point not being stored in initial value form 141, then before can carrying out initialization, obtained with interpositioning computing according to the initial value stored by controller 142 (such as microprocessing unit).Whereby, can save in a large number memory headroom again can not materially affect to touch-control accuracy.
Then, the initial value of initial value form 141 (or interpolative operation obtain initial value) is fed to digital to analog converter (DAC) 143 by controller 142, after being converted to the initial value of simulation pattern, be fed to the described integrator 121 of induced signal receiver 12 successively, to carry out the initialization of integrator 121.
As previously mentioned, induced signal receiver 12 is electrically coupled to the second electrode Rx0-Rxn (or being called passage), to process the induced signal of described second electrode Rx0-Rxn.With embodiment illustrated in fig. 2, described integrator 121 directly receives the induced signal of described second electrode Rx0-Rxn, but is not limited to this.Fig. 3 A shows the thin portion circuit diagram of the induced signal receiver 12 of another embodiment of the present invention, and Fig. 3 B shows the correlation timing figure of Fig. 3 A.For simplicity, illustrate only two passage CH0 and CH1 wherein.The present embodiment indirectly receives and processes the induced signal of described second electrode Rx0-Rxn, and in other words, the present embodiment receives and processes derivation (derived) induced signal of described second electrode Rx0-Rxn.The details of the present embodiment can with reference to the United States Patent (USP) Applicatioll of present invention applicant, and Application No. the 61/564th, No. 995, its content is considered as a part for instructions of the present invention.
The integrator 121 of the present embodiment uses integral restrictor k0w0/k0w1 and initial switch k0c0/k0c1 to switch between integration and initialization, and its operation is same as previous embodiment, therefore will not describe.With previous embodiment unlike, the integration of the present embodiment is divided into the two-stage to perform.The first integral stage, that is when switch p1 is for closed (switch p2 is off), the first amplifier 1211A of first passage CH0 and the first capacitor C1A carries out repeatedly (such as three times) integration by K switch 1, relends by K switch 2 and first time integral result is fed to the second amplifier 1211B to carry out second time integration.Meanwhile, the first amplifier 1211A and the second capacitor C1B of second channel CH1 carry out repeatedly integration by K switch 1, relend by K switch 2 by first time integral result negative value be fed to the second amplifier 1211B and carry out second time integration.Whereby, the induced signal difference that the second amplifier 1211B person is this two channel is fed to.In like manner, in the second integral stage, that is when switch p2 is for closed (switch p1 is off), be fed to the induced signal difference that the second amplifier 1211B person is also this two channel.The induced signal receiver 12 of the present embodiment processes the induced signal difference of adjacent channel, but not single channel induced signal itself, is thus reduced the impact of outside noise (such as display panel produce noise).In addition, also therefore can omit the screen layer between contact panel and display panel, thus be minimized thickness and the cost of touch-control system.
Comprehensively above-mentioned, the invention provides a kind of circuit for detecting of tool automatic calibration, comprise a signal receiver and an initial value generator.Signal receiver has at least one detector, and each during at least one measurement of each detector detects an induced signal during measuring.Described detector can be aforesaid integrator or other electrical signals metering circuit, to detect the signal received.Signal receiver can be the aforesaid induced signal of detecting, also can be other electrical signals to be measured of detecting.In addition, detector is electrically coupled to identical or different circuit during can being different measurement.Such as when detector lazy weight is once to have detected all circuit to be detected, detector can be during different measurements gradation by complete for all circuit detectings to be detected.Again such as, detector is being to identical circuit detecting to be detected in the different measuring cycle.Such as when the first different electrodes is provided drive singal, namely different measuring periods, to the second identical electrode detecting induced signal.
Initial value generator is as discussed previously, measure in advance and be stored to the initial value during each during at least one measurement of small part detector is measured, and the beginning during each is measured, is supplied to signal receiver, in order to carry out initialization to it according to the initial value prestored.Each initial value prestored stores in digital form, and be supplied to signal receiver with simulating signal.In addition, the initial value that each during at least one measurement of aforesaid at least part of detector prestores during measuring is this signal generation according to the detecting during corresponding measurement of corresponding detector.Such as, when the first different electrodes is provided driving letter, namely during corresponding different measurement, the induced signal detected according to each detector produces.
In addition, initial value generator is the initial value during each during at least one measurement of pre-nonresident portion detector is measured, and is the initial value that interpolative operation is not stored in the touch point of this initial value form, to be supplied to this induced signal receiver.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be do not depart from technical solution of the present invention content, according to any simple modification that technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (18)
1. a capacitance touch control system for tool automatic calibration, is characterized in that comprising:
Multiple first electrode and multiple second electrode, the infall of described first electrode and the second electrode defines multiple touch point;
One driving signal generator, it sequentially provides drive singal to described first electrode, and this drive singal is produced multiple induced signal and lays respectively at described second electrode by this first electrode driven by capacitance coupling effect;
One induced signal receiver, receives and processes described induced signal;
One position detector, it according to this first electrode driven and described induced signal, determines to detect the position touched a little during each is measured; And
One initial value generator, at least partly this touch point is not being measured in advance by the induced signal under the state of touching and is being stored in this initial value generator, beginning during each is measured, this initial value generator according to the induced signal prestored to produce the initial value of the induced signal of described second electrode, and be supplied to this induced signal receiver, in order to carry out initialization to it;
Wherein said induced signal receiver comprises multiple integrator, and its input end is electrically coupled to described second electrode respectively, and its output is fed to this position detector;
Wherein said initial value generator comprises a digital to analog converter, after this initial value being converted to simulation pattern, is fed to the described integrator of this induced signal receiver successively, to carry out the initialization of described integrator.
2. the capacitance touch control system of tool automatic calibration as claimed in claim 1, is characterized in that wherein said integrator comprises:
One amplifier;
One integrating condenser, is controllably electrically coupled between the input end of this amplifier and output terminal; And
At least one integral restrictor and at least one initial switch, when carrying out integration, this integral restrictor makes this integrating condenser be electrically coupled between the input end of this amplifier and output terminal, in order to obtain integration induced signal; When carrying out initialization, this initial switch makes this integrating condenser electric property coupling between this initial value generator and a reference potential, in order to carry out precharge to this integrator to perform initialization.
3. the capacitance touch control system of tool automatic calibration as claimed in claim 2, it is characterized in that wherein said amplifier comprises an operational amplifier, its reverse input end and output terminal are controllably coupled to the two ends of this integrating condenser.
4. the capacitance touch control system of tool automatic calibration as claimed in claim 1, is characterized in that wherein said initial value generator comprises:
One initial value form, it stores the initial value of described touch point at least partially; And
One controller, in order to be fed to this digital to analog converter by this initial value.
5. the capacitance touch control system of tool automatic calibration as claimed in claim 4, is characterized in that the initial value of the touch point not wherein being stored in this initial value form is obtained through interpolative operation by the initial value of this controller according to this storage.
6. the capacitance touch control system of tool automatic calibration as claimed in claim 4, is characterized in that wherein said initial value form is stored in a Nonvolatile memory.
7. the capacitance touch control system of tool automatic calibration as claimed in claim 1, is characterized in that wherein said induced signal receiver more comprises a circuit, in order to obtain the induced signal difference of this second electrode adjacent, to be fed to this integrator.
8. a capacitive touch control method for tool automatic calibration, is characterized in that comprising:
A () provides multiple first electrode and multiple second electrode, the infall of described first electrode and the second electrode defines multiple touch point;
B () sequentially provides drive singal to described first electrode, this drive singal is produced multiple induced signal and lays respectively at described second electrode by this first electrode driven by capacitance coupling effect;
C () receives and processes described induced signal;
D (), during each is measured, according to this first electrode driven and described induced signal, determines to detect the position touched a little;
E () is measured in advance and is stored to this touch point of small part not by the induced signal under the state of touching; And
F () beginning during each is measured, according to the induced signal prestored to produce the initial value of the induced signal of described second electrode, in order to carry out the initialization of integration;
After wherein said step (f) comprises and this initial value is converted to simulation pattern, carry out the initialization of integration successively.
9. the capacitive touch control method of tool automatic calibration as claimed in claim 8, it is characterized in that wherein said step (c) comprises multiple integration step, its respectively the second electrode described in electric property coupling to input this induced signal, after integration, integral result is supplied to step (d).
10. the capacitive touch control method of tool automatic calibration as claimed in claim 9, is characterized in that wherein said integration step more comprises:
When carrying out initialization, carry out precharge to perform the initialization of integration.
The capacitive touch control method of 11. tool automatic calibrations as claimed in claim 9, is characterized in that wherein said step (e) comprises:
Use an initial value form, to store the initial value of described touch point at least partially.
The capacitive touch control method of 12. tool automatic calibrations as claimed in claim 11, is characterized in that more comprising:
According to the initial value of this storage, after interpolative operation, not to be stored in the initial value of the touch point of this initial value form.
The capacitive touch control method of 13. tool automatic calibrations as claimed in claim 11, is characterized in that wherein said initial value form is stored in a Nonvolatile memory.
The capacitive touch control method of 14. tool automatic calibrations as claimed in claim 9, is characterized in that more comprising a step, in order to obtain the induced signal difference of this second electrode adjacent, to be supplied to this integration step.
The circuit for detecting of 15. 1 kinds of tool automatic calibrations, is characterized in that comprising:
One signal receiver, has at least one detector, and each during at least one measurement of each detector detects a signal during measuring;
One initial value generator, measure in advance and be stored to the initial value during each during at least one measurement of small part detector is measured, beginning during each measurement, this initial value generator is supplied to this signal receiver, in order to carry out initialization to it according to the initial value prestored;
Wherein said signal receiver comprises multiple integrator;
Wherein said initial value generator comprises a digital to analog converter, after this initial value being converted to simulation pattern, is fed to the described integrator of this signal receiver successively, to carry out the initialization of described integrator.
The circuit for detecting of 16. tool automatic calibrations as claimed in claim 15, is characterized in that wherein said each initial value prestored stores in digital form, and is supplied to this signal receiver with simulating signal.
The circuit for detecting of 17. tool automatic calibrations as claimed in claim 15, is characterized in that the initial value prestored during each during at least one measurement of wherein said at least part of detector is measured is this signal generation according to the detecting during corresponding measurement of corresponding detector.
The circuit for detecting of 18. tool automatic calibrations as claimed in claim 15, it is characterized in that wherein said initial value generator comprise an initial value form with pre-nonresident portion detector during at least one measurement each measure during initial value, and described initial value generator interpolative operation is not stored in the initial value of this initial value form, to be supplied to this signal receiver.
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| CN107209612A (en) * | 2015-12-31 | 2017-09-26 | 深圳市柔宇科技有限公司 | The adjusting process and calibration apparatus of capacitance touch module |
| CN106557208A (en) * | 2016-11-30 | 2017-04-05 | 无锡华润矽科微电子有限公司 | Realize the method that touch-screen is calibrated automatically |
| CN108874196B (en) * | 2017-05-15 | 2021-05-25 | 原相科技股份有限公司 | Induction quantity compensation method of touch sensor and touch panel thereof |
| TWI765970B (en) * | 2018-02-14 | 2022-06-01 | 李尚禮 | Capacitive sensor device, event-detecting method for sensed condition thereof and determining method for correcting time thereof |
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