CN104375696A - Touch screen induction value self-correcting device and method - Google Patents
Touch screen induction value self-correcting device and method Download PDFInfo
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- CN104375696A CN104375696A CN201410531650.9A CN201410531650A CN104375696A CN 104375696 A CN104375696 A CN 104375696A CN 201410531650 A CN201410531650 A CN 201410531650A CN 104375696 A CN104375696 A CN 104375696A
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- value
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- influence value
- touch screen
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
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- Theoretical Computer Science (AREA)
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- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention discloses a touch screen induction value self-correcting device and method. The device comprises a multiplying unit, a comparison circuit and an automatic gain control circuit, wherein the multiplying unit is used for multiplying induction values of sensors with updated gain values and outputting corrected induction values; the comparison circuit is used for comparing the corrected induction values corresponding to all the sensors so as to obtain difference values corresponding to all the sensors; the automatic gain control circuit is used for calculating the gain values of all the sensors so that the corrected induction values corresponding to all the sensors can be approximately equal in a next round of operation; the calculated gain values corresponding to all the sensors are compared with historical gain values; if a difference value is beyond a set range, it is indicated that the gain values are still unstable and need to be corrected continuously; if the difference value is within the set range, it is indicated that the gain values are stable, the gain values are saved, and the self-correcting process is ended. By means of the touch screen induction value self-correcting device and method, all the sensors have the same value after being corrected, and induction value errors caused by property difference of touch screens or for other reasons are avoided.
Description
Technical field
The application relates to touch-screen and corrects field, and concrete, relating to one can carry out self-tuning device to touch screen induction value, and utilizes this device to carry out the method corrected.
Background technology
Digital mobile equipments has been widely used in the various aspects of people's life, is especially convenient to the tangible digital mobile equipments of man-machine interaction, has been widely used in and has comprised the various of mobile phone, ATM, PAD etc. and need in the digital device of man-machine interaction.These tangible digital mobile equipments mainly rely on touch-screen to carry out the input of information, and instead of keyboard.Can therefore, accurately reflect the position that touch-screen is touched, be man-machine key that correctly mutual.If the different sensors of touch-screen has different characteristics, so just may obtain different influence values for identical touch, namely accurately cannot calculate touch location, thus correctly cannot transmit the information of user's expression.
Therefore, how the sensor of touch-screen can be corrected automatically, to make identical touch obtain identical sensor values, thus the information transmitting user's expression exactly becomes the technical matters that prior art needs solution badly.
Summary of the invention
The object of the invention is to propose the self-tuning apparatus and method of a kind of touch screen induction value, when testing, can ensure that the numerical value that each sensor correction of a final proof obtains is consistent, or within error range.
For reaching this object, the present invention by the following technical solutions:
The self-tuning device of a kind of touch screen induction value, comprise sensor, multiplier, comparator circuit and automatic gain control unit, wherein, sensor, for obtaining the influence value of the sensor under touch condition, and issues described multiplier, multiplier, for obtained influence value is multiplied with the yield value upgraded, and the influence value of output calibration, when multiplier first time computing, initial yield value is set to 1, comparator circuit, for after the influence value obtaining described correction, compares the influence value of correction corresponding to each sensor, thus corresponding each sensor obtains corresponding difference value, automatic gain control circuit, for after obtaining difference value corresponding to each sensor, calculate the yield value that each sensor is corresponding, with the influence value approximately equal of the correction making each sensor of obtaining in next round computing corresponding, simultaneously, the yield value that each sensor this calculated is corresponding, compare with the yield value of the history of the M before each sensor, if difference value exceeds the scope of setting, then show that yield value is still unstable, need to continue to correct, if difference value is in the scope of setting, then show to have obtained the stable gain for correcting touch screen influence value, preserve this gain, terminate self-calibration process.
Preferably, also there is smoothed filter circuit, described sensor is issued to influence value smoothingization of described multiplier, the influence value that sensor exports by described smoothed filter circuit, get weighted mean with the correction influence value of history, obtain new correction influence value, and be sent to multiplier.
Preferably, in the yield value of a described M history, M value is adjustable, to determine the degree of gain stabilization.
Preferably, the scope of the described setting of comparing for difference value is adjustable, is determined the degree of gain stabilization by the scope adjusting described setting.
The invention also discloses a kind of touch screen induction value automatic correcting method, utilize above-mentioned touch screen induction value self-correcting device to correct, comprise the steps:
Influence value obtaining step S110: the influence value obtaining the sensor under touch condition, and issue described multiplier;
Correct influence value and obtain step S120, utilize described multiplier to be multiplied with the yield value upgraded by obtained influence value, and the influence value of output calibration, when multiplier first time computing, initial yield value is set to 1;
Correct influence value comparison step S130, after the influence value obtaining described correction, compare the influence value of correction corresponding to each sensor, thus corresponding each sensor obtains corresponding difference value;
Automatic growth control step S140, after obtaining difference value corresponding to each sensor, calculate the yield value that each sensor is corresponding, with the influence value approximately equal of the correction making each sensor of obtaining in next round computing corresponding, simultaneously, the yield value that each sensor this calculated is corresponding, compare with the yield value of the history of the M before each sensor, if difference value exceeds the scope of setting, then show that yield value is still unstable, need to continue to correct, if difference value is in the scope of setting, then show to have obtained the stable gain for correcting touch screen influence value, preserve this gain, terminate self-calibration process.
Preferably, obtain, between step, also there is smothing filtering step at described influence value obtaining step and described correction influence value, to influence value smoothingization that described influence value obtaining step obtains, by the influence value that sensor exports, weighted mean is got with the correction influence value of history, obtain new correction influence value, then carry out correction influence value and obtain step.
Preferably, in the yield value of a described M history, M value is adjustable, to determine the degree of gain stabilization.
Preferably, the scope of the described setting of comparing for difference value is adjustable, is determined the degree of gain stabilization by the scope adjusting described setting.
The present invention corrects touch-screen output valve, make each sensor after overcorrect have identical value, that is, different sensors is identical for identical touch result, avoid due to touch-screen property difference, or the error of influence value that other reason causes.It will be appreciated by those skilled in the art that in time correcting touch-screen, each sensor is all in touch condition, and has identical touch condition as far as possible, true to make the result of testing try one's best.In reality test, mechanical arm can be used to touch all sensors, with Reality simulation environment.
Accompanying drawing explanation
Fig. 1 is the self-tuning device of touch screen induction value according to the specific embodiment of the invention;
Fig. 2 is the method utilizing the self-tuning device of touch screen induction value of the present invention to correct touch-screen.
The technical characteristic that Reference numeral in figure refers to respectively is:
1, sensor; 2, smoothing filter; 3, multiplier; 4, comparator circuit; 5, automatic gain control unit.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.Be understandable that, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, illustrate only part related to the present invention in accompanying drawing but not entire infrastructure.
See Fig. 1, show according to the self-tuning device of touch screen induction value of the present invention, comprise sensor 1, multiplier 3, comparator circuit 4 and automatic gain control unit 5.
Wherein, sensor 1, for obtaining the influence value of the sensor 1 under touch condition, and issues described multiplier;
Multiplier 3, for obtained influence value is multiplied with the yield value upgraded, and the influence value of output calibration, when multiplier first time computing, initial yield value is set to 1;
Comparator circuit 4, for after the influence value obtaining described correction, compares the influence value of correction corresponding to each sensor, thus corresponding each sensor obtains corresponding difference value;
Automatic gain control circuit 5, for after obtaining difference value corresponding to each sensor, calculate the yield value that each sensor is corresponding, substantially equal with the influence value of the correction making each sensor of obtaining in next round computing corresponding, simultaneously, the yield value that each sensor this calculated is corresponding, compare with the yield value of the history of the M before each sensor, if difference value exceeds the scope of setting, then show that yield value is still unstable, need to continue to correct, if difference value is in the scope of setting, then show to have obtained the stable gain for correcting touch screen influence value, preserve this gain, terminate self-calibration process.
It will be appreciated by those skilled in the art that, so-called end self-calibration process, just finishes the judgement renewal process of yield value, uses stable yield value to carry out gain calculating; It is not yet stable that self-calibration process refers to yield value, also in continuous judgement, to obtain new yield value, with make each sensor calibration with influence value approximately equal.
Preferably, also there is smoothed filter circuit 2, described sensor is issued to influence value smoothingization of described multiplier, the influence value that sensor exports by described smoothed filter circuit 2, get weighted mean with the correction influence value of history, obtain new correction influence value, and be sent to multiplier 3.
Such as, the current influence value that sensor sends is X (t), the correction influence value of history, and namely the last correction influence value obtained is X
c(t-1) influence value after, level and smooth is X
c(t), then X
c(t)=(1-a) * X
c(t-1)+a*X (t).Wherein a is weighted value, a adjustable, like this, can filter out unstable influence value, makes the reference signal of Gain tuning more stable and reliable.
Wherein, in the yield value of a described M history, M value is adjustable.Can be determined the degree of gain stabilization by the value adjusting M, the gain that M obtains more greatly is more stable, such as, can be 100.
Wherein, the scope of the described setting of comparing for difference value is adjustable, can be determined the degree of gain stabilization by the scope adjusting described setting, the scope of the described setting of difference value is less, and the gain obtained is more stable, such as, compare with the yield value of M history successively, difference value is all within 5%.
Therefore, the present invention corrects touch-screen output valve, each sensor after overcorrect is made to have identical value, that is, different sensors is identical for identical touch result, avoid due to touch-screen property difference, or the error of influence value that other reason causes.It will be appreciated by those skilled in the art that in time correcting touch-screen, each sensor is all in touch condition, and has identical touch condition as far as possible, true to make the result of testing try one's best.In reality test, mechanical arm can be used to touch all sensors, with Reality simulation environment.
The invention also discloses a kind of touch screen induction value automatic correcting method, the touch screen induction value self-correcting device of above-described embodiment can be adopted to correct, comprise the steps:
Influence value obtaining step S110: the influence value obtaining the sensor under touch condition, and issue described multiplier;
Correct influence value and obtain step S120, utilize described multiplier to be multiplied with the yield value upgraded by obtained influence value, and the influence value of output calibration, when multiplier first time computing, initial yield value is set to 1;
Correct influence value comparison step S130, after the influence value obtaining described correction, compare the influence value of correction corresponding to each sensor, thus corresponding each sensor obtains corresponding difference value;
Automatic growth control step S140, after obtaining difference value corresponding to each sensor, calculate the yield value that each sensor is corresponding, substantially equal with the influence value of the correction making each sensor of obtaining in next round computing corresponding, simultaneously, the yield value that each sensor this calculated is corresponding, compare with the yield value of the history of the M before each sensor, if difference value exceeds the scope of setting, then show that yield value is still unstable, need to continue to correct, if difference value is in the scope of setting, then show to have obtained the stable gain for correcting touch screen influence value, preserve this gain, terminate self-calibration process.
Preferably, obtain, between step, also there is smothing filtering step S115 at described influence value obtaining step and described correction influence value, to influence value smoothingization that described influence value obtaining step obtains, by the influence value that sensor exports, weighted mean is got with the correction influence value of history, obtain new correction influence value, then carry out correction influence value and obtain step S120.
Such as, the current influence value that described influence value obtaining step obtains is X (t), the correction influence value of history, and namely the last correction influence value obtained is X
c(t-1) influence value after, level and smooth is X
c(t), then X
c(t)=(1-a) * X
c(t-1)+a*X (t).Wherein a is weighted value, a adjustable, like this, can filter out unstable influence value, makes the reference signal of Gain tuning more stable and reliable.
Wherein, in the yield value of a described M history, M value is adjustable.Can be determined the degree of gain stabilization by the value adjusting M, the gain that M obtains more greatly is more stable, such as, can be 100.
Wherein, the scope of the described setting of comparing for difference value is adjustable, can be determined the degree of gain stabilization by the scope adjusting described setting, the scope of the described setting of difference value is less, and the gain obtained is more stable, such as, compare with the yield value of M history successively, difference value is all within 5%.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each unit or each step can realize with general calculation element, they can concentrate on single calculation element, alternatively, they can realize with the executable program code of computer installation, thus they storages can be performed by calculation element in the storage device, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to the combination of any specific hardware and software.
Above content is in conjunction with concrete preferred implementation further description made for the present invention; can not assert that the specific embodiment of the present invention is only limitted to this; for general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; some simple deduction or replace can also be made, all should be considered as belonging to the present invention by submitted to claims determination protection domain.
Claims (8)
1. the self-tuning device of touch screen induction value, comprises sensor, multiplier, comparator circuit and automatic gain control unit,
Wherein, sensor, for obtaining the influence value of the sensor under touch condition, and issues described multiplier;
Multiplier, for obtained influence value is multiplied with the yield value upgraded, and the influence value of output calibration, when multiplier first time computing, initial yield value is set to 1;
Comparator circuit, for after the influence value obtaining described correction, compares the influence value of correction corresponding to each sensor, thus corresponding each sensor obtains corresponding difference value;
Automatic gain control circuit, for after obtaining difference value corresponding to each sensor, calculate the yield value that each sensor is corresponding, with the influence value approximately equal of the correction making each sensor of obtaining in next round computing corresponding, simultaneously, the yield value that each sensor this calculated is corresponding, compare with the yield value of the history of the M before each sensor, if difference value exceeds the scope of setting, then show that yield value is still unstable, need to continue to correct, if difference value is in the scope of setting, then show to have obtained the stable gain for correcting touch screen influence value, preserve this gain, terminate self-calibration process.
2. the self-tuning device of touch screen induction value according to claim 1, is characterized in that:
Also there is smoothed filter circuit, described sensor is issued to influence value smoothingization of described multiplier, the influence value that sensor exports by described smoothed filter circuit, get weighted mean with the correction influence value of history, obtain new correction influence value, and be sent to multiplier.
3. the self-tuning device of touch screen induction value according to claim 2, is characterized in that:
In the yield value of a described M history, M value is adjustable, to determine the degree of gain stabilization.
4. the self-tuning device of touch screen induction value according to claim 2, is characterized in that:
The scope of the described setting of comparing for difference value is adjustable, is determined the degree of gain stabilization by the scope adjusting described setting.
5. a touch screen induction value automatic correcting method, utilizes the touch screen induction value self-correcting device in claim 1-4 described in any one to correct, comprises the steps:
Influence value obtaining step S110: the influence value obtaining the sensor under touch condition, and issue described multiplier;
Correct influence value and obtain step S120, utilize described multiplier to be multiplied with the yield value upgraded by obtained influence value, and the influence value of output calibration, when multiplier first time computing, initial yield value is set to 1;
Correct influence value comparison step S130, after the influence value obtaining described correction, compare the influence value of correction corresponding to each sensor, thus corresponding each sensor obtains corresponding difference value;
Automatic growth control step S140, after obtaining difference value corresponding to each sensor, calculate the yield value that each sensor is corresponding, with the influence value approximately equal of the correction making each sensor of obtaining in next round computing corresponding, simultaneously, the yield value that each sensor this calculated is corresponding, compare with the yield value of the history of the M before each sensor, if difference value exceeds the scope of setting, then show that yield value is still unstable, need to continue to correct, if difference value is in the scope of setting, then show to have obtained the stable gain for correcting touch screen influence value, preserve this gain, terminate self-calibration process.
6. touch screen induction value automatic correcting method according to claim 5, is characterized in that:
Obtain, between step, also there is smothing filtering step at described influence value obtaining step and described correction influence value, to influence value smoothingization that described influence value obtaining step obtains, by the influence value that sensor exports, weighted mean is got with the correction influence value of history, obtain new correction influence value, then carry out correction influence value and obtain step.
7. touch screen induction value automatic correcting method according to claim 6, is characterized in that:
In the yield value of a described M history, M value is adjustable, to determine the degree of gain stabilization.
8. touch screen induction value automatic correcting method according to claim 6, is characterized in that:
The scope of the described setting of comparing for difference value is adjustable, is determined the degree of gain stabilization by the scope adjusting described setting.
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| CN201410531650.9A CN104375696B (en) | 2014-10-10 | 2014-10-10 | The apparatus and method of touch screen induction value self-correcting |
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| CN201410531650.9A CN104375696B (en) | 2014-10-10 | 2014-10-10 | The apparatus and method of touch screen induction value self-correcting |
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| CN110390238A (en) * | 2018-04-23 | 2019-10-29 | 联咏科技股份有限公司 | Finger stablizes method for detecting and finger stablizes arrangement for detecting |
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| CN104375696B (en) | 2017-08-29 |
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