CN101859202B - Compensation method for critical value - Google Patents
Compensation method for critical value Download PDFInfo
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- CN101859202B CN101859202B CN2010102063670A CN201010206367A CN101859202B CN 101859202 B CN101859202 B CN 101859202B CN 2010102063670 A CN2010102063670 A CN 2010102063670A CN 201010206367 A CN201010206367 A CN 201010206367A CN 101859202 B CN101859202 B CN 101859202B
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Abstract
The invention relates to a compensation method for a critical value, which is suitable for a touch system. The touch system comprises a plurality of touch points. In the embodiment, the compensation method for the critical value comprises the following steps: selecting at least one touch point as a selected object; acquiring the sensing data of each touch point in the selected object in each initialization frequency period in multiple initialization frequency periods; acquiring a sensing data difference of the sensing data of each touch point in the selected object in two adjacent initialization frequency periods; acquiring the maximum sensing data difference in the sensing data differences in each initialization frequency period of the selected object; and setting the initialization critical value of the selected object according to the maximum sensing data difference.
Description
Technical field
The invention relates to the touch technology field, and particularly relevant for a kind of compensation method for critical value that is suitable for touch-control system.
Background technology
Press, contact panel provides a kind of new man-machine interaction interface, its in the use more intuition, more meet human nature.Yet; Sense data is easy to along with environment, temperature and/or humidity produce noise in various degree on the contact surface plate; And processor whether judge sense data be that the critical value (Threshold) of press points is a certain value, if critical value is too low, the then easy maloperation of touch-control system; Otherwise critical value is too high, and then the sensitivity meeting of touch-control system reduces.
Therefore, how compensating environment in the prior art, temperature and/or humidity is present problem demanding prompt solution to the influence of sense data with the sensitivity that promotes touch-control system.
Summary of the invention
The purpose of this invention is to provide a kind of compensation method for critical value, be applicable to touch-control system, to promote the sensitivity of touch-control system.
A kind of compensation method for critical value that the embodiment of the invention proposes is applicable to a touch-control system; At this, touch-control system comprises a plurality of touch points.The compensation method for critical value of present embodiment comprises step: choose at least one touch point as selected object; Obtain the sense data in each touch point each the initialization frequency period in a plurality of initialization frequency periods in the selected object; Obtain a sense data difference value of the sense data of each touch point in every adjacent two initialization frequency periods in the selected object; Obtain the maximum sense data difference value in the sense data difference value of selected object in each initialization frequency period; And the maximum sense data difference value of foundation is set the initialization critical value of selected object.
In one embodiment of this invention, the maximum sense data difference value of the foundation in the above-mentioned compensation method for critical value step of setting the initialization critical value of selected object comprises: calculate first critical value according to maximum sense data difference value; Judge that whether first critical value is greater than preset maximum critical value; And if first critical value is then set preset maximum critical value as the initialization critical value, otherwise is set first critical value as the initialization critical value greater than preset maximum critical value.
In one embodiment of this invention, above-mentioned compensation method for critical value also comprises step: the sensing benchmark that the mean value of the sense data of selected object in each initialization frequency period is made as selected object.
In one embodiment of this invention; In the above-mentioned compensation method for critical value; When the current dynamic threshold value of selected object is above-mentioned initialization critical value, also comprise step: obtaining the sense data of each touch point in the touch control operation frequency period in the selected object must at least one reference differences value with the reference differences value of above-mentioned sensing benchmark; Obtain the maximum reference differences value in this at least one reference differences value; And whether the decision of the relative size of maximum reference differences value of foundation and initialization critical value relation upgrades the current dynamic threshold value of selected object.
In one embodiment of this invention; The step whether decision of the relative size of maximum reference differences value of the foundation in the above-mentioned compensation method for critical value and initialization critical value relation upgrades the current dynamic threshold value of selected object comprises: when maximum reference differences value during greater than the initialization critical value, do not upgrade the current dynamic threshold value of selected object; And when maximum reference differences value is not more than the initialization critical value, upgrade the current dynamic threshold value of selected object according to maximum reference differences value.
In one embodiment of this invention, the maximum reference differences value of the foundation in the above-mentioned compensation method for critical value step of upgrading the current dynamic threshold value of selected object comprises: produce new critical value according to maximum reference differences value; Newer critical value and the preset maximum critical value of choosing to object; If new critical value is greater than preset maximum critical value, the current dynamic threshold value of selected object is updated to preset maximum critical value; And if new critical value is not more than preset maximum critical value, the current dynamic threshold value of selected object is updated to new critical value.
The another kind of compensation method for critical value that the embodiment of the invention proposes is applicable to touch-control system; At this, touch-control system comprises a plurality of touch points.In the present embodiment, compensation method for critical value comprises step: choose at least one touch point as selected object; Obtaining in the selected object sense data of each touch point in frequency period must at least one reference differences value with the reference differences value of the sensing benchmark of selected object; Obtain the maximum reference differences value in this at least one reference differences value; And whether the decision of the relative size of the current dynamic threshold value of maximum reference differences value of foundation and selected object relation upgrades the current dynamic threshold value of selected object.
In one embodiment of this invention; The step whether the relative size relation decision of the current dynamic threshold value of maximum reference differences value of the foundation in the above-mentioned compensation method for critical value and selected object upgrades the current dynamic threshold value of selected object comprises: if maximum reference differences value greater than the current dynamic threshold value of selected object, is not then upgraded the current dynamic threshold value of selected object; And if maximum reference differences value is not more than the current dynamic threshold value of selected object, then upgrade the current dynamic threshold value of selected object according to maximum reference differences value.
In one embodiment of this invention, the step of upgrading the current dynamic threshold value of selected object according to maximum reference differences value in the above-mentioned compensation method for critical value comprises: produce new critical value according to maximum reference differences value; Newer critical value and the preset maximum critical value of choosing to object; If new critical value is greater than preset maximum critical value, the current dynamic threshold value of selected object is updated to preset maximum critical value; And if new critical value is not more than preset maximum critical value, the current dynamic threshold value of selected object is updated to new critical value.
In one embodiment of this invention; Above-mentioned compensation method for critical value also comprises step: make touch-control system carry out initialize routine with the sensing benchmark that obtains selected object and the initialization critical value of selected object, and initialization critical value and sensing benchmark all with selected object in the sense data of each touch point the initialize routine term of execution be associated.
The embodiment of the invention is obtained the maximum sense data difference value of selected object during initialization through during the initialization of touch-control system, carrying out initialize routine; So that touch-control system can be according to the state automatic setting initialization critical value of contact surface plate in the present touch-control system, avoid because of for example setting out inappropriate preset critical with artificial mode: the preset critical of product export is experiment value normally.On the other hand, the embodiment of the invention optionally dynamically updates through the critical value to touch-control system during the touch control operation after the initialization, with compensating touch control operating period environmental factor by this to the influence of sense data.In brief, the embodiment of the invention can effectively promote the sensitivity of touch-control system through in automatic setting initialization critical value during the initialization and/or during touch control operation, optionally dynamically update critical value.
For let above and other objects of the present invention, feature and advantage can be more obviously understandable, hereinafter is special lifts preferred embodiment, and cooperates appended graphicly, elaborates as follows.
Description of drawings
Fig. 1 shows the structured flowchart of the touch-control system that is suitable for carrying out a kind of compensation method for critical value that the embodiment of the invention proposes.
Fig. 2 shows the process flow diagram of the compensation method for critical value that is relevant to the embodiment of the invention.
Fig. 3 shows the mode of operation figure of compensation method for critical value during touch control operation that is relevant to the embodiment of the invention.
[main element label declaration]
10: touch-control system 12: contact panel
121: touch point 13: flexible PCB
14: drive and sensing circuit 16: processor
18: main frame 100: carry out the initialize routine step
110,130,150,120: carry out the initialize routine step step by step
200: the setting step Δ Diff of initialization critical value: maximum reference differences value
Embodiment
See also Fig. 1, it shows the structured flowchart of the touch-control system that is suitable for carrying out a kind of compensation method for critical value that the embodiment of the invention proposes.As shown in Figure 1, touch-control system 10 comprises contact panel 12, driving and sensing circuit 14, processor 16 and main frame 18.Wherein, contact panel 12 is provided with sweep trace X1, X2 ..., Xn and sense wire Y1, Y2; ..., Ym, at this, n, m are positive integer, sense wire Y1; Y2 ..., Ym and sweep trace X1, X2 ..., the arranged in a crossed manner and definition of Xn (the individual touch point 121 of n * m) at its crossover location place.Driving and sensing circuit 14 for example are electrically coupled to contact panel 12 through flexible PCB 13 and drive and sensing functions so that contact panel 12 is carried out, and for example driving and sensing circuit 14 provide drive signal (the for example periodic square wave signal among Fig. 1) to each sweep trace X1, X2; ...; Xn to be lining by line scan, and simultaneously with by each sense wire of column scan mode sensing Y1, Y2; ..., the output signal of Ym (that is sense data of corresponding each touch point 121).Processor 16 and driving and sensing circuit 14 be electric property coupling mutually; Receive to drive and the sense data of each touch point 121 that sensing circuit 14 senses and handling; And then the touch position when judging whether touch point 121 by touching and by touching, this judged result will be passed to main frame 18 through communication interface.
Please consult Fig. 1 and Fig. 2 in the lump, Fig. 2 shows the process flow diagram of the compensation method for critical value that is relevant to the embodiment of the invention.As shown in Figure 2, the compensation method for critical value of the embodiment of the invention comprises step 100 and 200, particularly:
Step 100: carry out initialize routine, to obtain the maximum sensing difference value of selected object during initialization and the sensing benchmark (Baseline) of selected object.At this, initialize routine can be moved when touch-control system starts automatically, also can the person of being to use triggers according to self demand and moves; Selected object can for example be among Fig. 1 the choosing of frame of broken lines institute frame (the individual touch point 121 of n * m), selected object also can be only to comprise n touch point 121 on the same sense wire or only be single touch point certainly.In the present embodiment, will comprise that (the individual touch point 121 of n * m) is as describing for example, and step 100 can comprise step by step 110,130,150 and 120 with selected object.
Step by step 110: obtain the sense data in each touch point each initialization frequency period in a plurality of initialization frequency periods in the selected object; At this; Usually comprise a plurality of (for example z) consecutive initialization frequency period frame period (frame period) for example during the initialization, (the individual sense data of n * m * z) then can be by the driving in the touch-control system 10 and sensing circuit 14 sensings and and be sent to processor 16 and carry out subsequent treatment.
Step by step 130: the sense data difference value of obtaining the sense data of each touch point in every adjacent two initialization frequency periods in the selected object; At this, (selected object of individual touch point of n * m), processor 16 will produce [n * m * (z-1)] individual sense data difference value for comprising.
Step by step 150: obtain the maximum sense data difference value in the sense data difference value of selected object in each initialization frequency period; At this, processor 16 can be earlier from every adjacent two the initialization frequency periods of correspondence (n * m) find out a maximum sensing difference value the individual sense data difference value picks out the maximum more afterwards and stores as net result from z maximum sensing difference value.
Step by step 120: the sensing benchmark that the mean value of the sense data of selected object in each initialization frequency period is made as selected object; At this, processor 16 can be carried out once on average to obtain (z-1) individual mean value selected object (n * m * 2) sense data in every adjacent two initialization frequency periods, afterwards with this (z-1) individual mean value do again on average get final product the sensing benchmark of selected object.
After executing initialize routine step 100, then continue to carry out the setting step 200 of initialization critical value: the initialization critical value (Defaultthreshold) of setting selected object according to maximum sense data difference value.Particularly, the setting step 200 of initialization critical value can be realized by following step by step: at first calculate a critical value according to maximum sense data difference value, judge that afterwards whether this critical value is greater than preset maximum critical value (Maximum threshold); If this critical value, is then set the initialization critical value of preset maximum critical value as selected object greater than preset maximum critical value, this critical value is not more than preset maximum critical value else if, then sets the initialization critical value of this critical value as selected object.So far, touch-control system 10 is accomplished the automated setting of initialization critical value.
Fig. 3 shows the mode of operation figure of compensation method for critical value during touch control operation that is relevant to the embodiment of the invention.To combine Fig. 1 and Fig. 3 below, be elaborated as the mode of operation of compensation method for critical value during touch control operation of giving an example the embodiment of the invention with the situation that dynamically updates of the critical value in the 1st to the 15th the touch control operation frequency period after touch-control system 10 initialization.
Particularly; In the 1st touch control operation frequency period; The current dynamic threshold value of selected object is the initialization critical value of aforesaid automatic setting; Driving and sensing circuit 14 will obtain the sense data of each touch point 121 in the selected object and this sense data will be sent to processor 16, calculate the reference differences value between sense data and the aforesaid sensing benchmark by processor 16; At this, (selected object of individual touch point 121 of n * m), processor 16 will calculate (the individual reference differences value of n * m) for comprising.Then, processor 16 will be from then on (finds out maximum reference differences value Δ Diff and whether upgrades current dynamic threshold value according to the relative size relation decision of maximum reference differences value Δ Diff and current dynamic threshold value in the individual reference differences value of n * m).
Can be known that by Fig. 3 the maximum reference differences value Δ Diff in the 1st touch control operation frequency period is less than current dynamic threshold value, the touch point in its expression selected object is current not to be touched, and therefore judgement needs to upgrade current dynamic threshold value.Afterwards, processor 16 will produce a new critical value according to maximum reference differences value Δ Diff, and new critical value can be through adding a constant or utilize linear function to produce on the basis of maximum reference differences value Δ Diff.Then, the reckling of choosing in new critical value and the preset maximum critical value upgrades the also current dynamic threshold value of next (for example the 2nd) the touch control operation frequency period of conduct of current dynamic threshold value.
For the 2-6 shown in Fig. 3,9-11 and 14-15 touch control operation frequency period; Because its maximum reference differences value Δ Diff is all less than separately current dynamic threshold value; Show touch point in the selected object not by touch-control needs renewal current dynamic threshold value separately; The update method of current dynamic threshold value and the 1st touch control operation frequency period are same, so repeat no more at this.
In 7-8 and 12-13 touch control operation frequency period; Because its maximum reference differences value Δ Diff is all greater than separately current dynamic threshold value; Showing that touch point in the selected object has is touched; Then judge and its current dynamic threshold value is not upgraded, so can prevent to upgrade dynamic threshold value can make the mistake (because this moment, sense data can produce bigger variation because of the touching operation).
In sum; The embodiment of the invention is obtained the maximum sense data difference value of selected object during initialization through during the initialization of touch-control system, carrying out initialize routine; To such an extent as to touch-control system can be according to the state automatic setting initialization critical value of contact surface plate in the present touch-control system, avoid because of for example setting out inappropriate preset critical with artificial mode: the preset critical of product export is experiment value normally.On the other hand, the embodiment of the invention optionally dynamically updates through the critical value to touch-control system during the touch control operation after the initialization, with compensating touch control operating period environmental factor by this to the influence of sense data.In brief, the embodiment of the invention can effectively promote the sensitivity of touch-control system through in automatic setting initialization critical value during the initialization and/or during touch control operation, optionally dynamically update critical value.
Though the present invention discloses as above with preferred embodiment; Right its is not in order to limit the present invention; Any those skilled in the art; Do not breaking away from the spirit and scope of the present invention, when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking appended the claim scope person of defining.
Claims (10)
1. a compensation method for critical value is applicable to a touch-control system, and this touch-control system comprises a plurality of touch points; This compensation method for critical value comprises step:
Choose at least one these a plurality of touch points as selected object;
Obtain the sense data in these a plurality of initialization frequency periods of each this touch point each in a plurality of initialization frequency periods in this selected object;
Obtain a sense data difference value of those sense datas of each this touch point in every adjacent two these a plurality of initialization frequency periods in this selected object;
Obtain the maximum sense data difference value in this selected object those sense data difference value in those initialization frequency periods; And
Set an initialization critical value of this selected object according to this maximum sense data difference value.
2. compensation method for critical value according to claim 1 wherein comprises according to the step that this maximum sense data difference value is set an initialization critical value of this selected object:
Calculate one first critical value according to this maximum sense data difference value;
Judge that whether this first critical value is greater than a preset maximum critical value; And
Should preset maximum critical value as this initialization critical value if this first critical value greater than this preset maximum critical value, is then set, otherwise set this first critical value as this initialization critical value.
3. compensation method for critical value according to claim 1 also comprises step:
One mean value of those sense datas of this selected object in those initialization frequency periods is made as a sensing benchmark of this selected object.
4. compensation method for critical value according to claim 3, wherein when the current dynamic threshold value of this selected object was this initialization critical value, this compensation method for critical value also comprised step:
Obtaining in this selected object each this touch point this sense data in a touch control operation frequency period must at least one this reference differences value with a reference differences value of this sensing benchmark;
Obtain the maximum reference differences value in this at least one reference differences value; And
Whether upgrade this current dynamic threshold value of this selected object according to the relative size relation decision of this maximum reference differences value and this initialization critical value.
5. compensation method for critical value according to claim 4, wherein the relative size according to this maximum reference differences value and this initialization critical value concerns whether decision is upgraded the step of this current dynamic threshold value of this selected object and comprised:
When this maximum reference differences value during, do not upgrade this current dynamic threshold value of this selected object greater than this initialization critical value; And
When this maximum reference differences value is not more than this initialization critical value, upgrade this current dynamic threshold value of this selected object according to this maximum reference differences value.
6. compensation method for critical value according to claim 5 wherein comprises according to the step that this maximum reference differences value is upgraded this current dynamic threshold value of this selected object:
Produce a new critical value according to this maximum reference differences value;
Relatively this new critical value and this choosing are to a preset maximum critical value of object;
If this new critical value is greater than this preset maximum critical value, this current dynamic threshold value of this selected object is updated to this preset maximum critical value; And
If this new critical value is not more than this preset maximum critical value, this current dynamic threshold value of this selected object is updated to this new critical value.
7. a compensation method for critical value is applicable to a touch-control system, and this touch-control system comprises a plurality of touch points; This compensation method for critical value comprises step:
Choose at least one those touch points as selected object;
Obtaining in this selected object the sense data of each this touch point in a frequency period must at least one this reference differences value with a reference differences value of a sensing benchmark of this selected object;
Obtain the maximum reference differences value in this at least one reference differences value; And
Whether upgrade this current dynamic threshold value of this selected object according to the relative size relation decision of the current dynamic threshold value of this maximum reference differences value and this selected object.
8. compensation method for critical value according to claim 7 wherein comprises according to the step whether the relative size relation decision of the current dynamic threshold value of this maximum reference differences value and this selected object upgrades this current dynamic threshold value of this selected object:
If should maximum reference differences value greater than this current dynamic threshold value of this selected object, then do not upgrade this current dynamic threshold value of this selected object; And
If should maximum reference differences value be not more than this current dynamic threshold value of this selected object, then upgrade this current dynamic threshold value of this selected object according to this maximum reference differences value.
9. compensation method for critical value according to claim 8, the step of wherein upgrading this current dynamic threshold value of this selected object according to this maximum reference differences value comprises:
Produce a new critical value according to this maximum reference differences value;
Relatively this new critical value and this choosing are to a preset maximum critical value of object;
If this new critical value is greater than this preset maximum critical value, this current dynamic threshold value of this selected object is updated to this preset maximum critical value; And
If this new critical value is not more than this preset maximum critical value, this current dynamic threshold value of this selected object is updated to this new critical value.
10. compensation method for critical value according to claim 7 also comprises step:
Make this touch-control system carry out an initialize routine with this sensing benchmark that obtains this selected object and an initialization critical value of this selected object,
Wherein, set this initialization critical value through following step: obtain the sense data in these a plurality of initialization frequency periods of each this touch point each in a plurality of initialization frequency periods in this selected object; Obtain a sense data difference value of those sense datas of each this touch point in every adjacent two these a plurality of initialization frequency periods in this selected object; Obtain the maximum sense data difference value in this selected object those sense data difference value in those initialization frequency periods; And set this initialization critical value of this selected object according to this maximum sense data difference value,
Wherein, set this sensing benchmark through following step: obtain this sense data in these a plurality of initialization frequency periods of each this touch point each in these a plurality of initialization frequency periods in this selected object; And this sensing benchmark that a mean value of those sense datas of this selected object in those initialization frequency periods is made as this selected object.
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| TWI457796B (en) | 2011-03-31 | 2014-10-21 | Novatek Microelectronics Corp | Driving method for touch-sensing display device and touch-sensing device thereof |
| CN102736765B (en) * | 2011-04-15 | 2016-07-20 | 联咏科技股份有限公司 | The driving method of touch control display apparatus and contactor control device thereof |
| TWI442298B (en) | 2011-10-27 | 2014-06-21 | Novatek Microelectronics Corp | Touch sensing method |
| CN103092378B (en) * | 2011-11-02 | 2016-02-17 | 联咏科技股份有限公司 | Sensing method of touch control |
| US20170131817A1 (en) * | 2015-11-05 | 2017-05-11 | Waltop International Corporation | Method for dynamically detecting threshold value of displaying stylus stroke on touch panel |
| WO2019023882A1 (en) * | 2017-07-31 | 2019-02-07 | 深圳市汇顶科技股份有限公司 | Touch detection method and apparatus, touchscreen and electronic terminal |
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