CN109117014A - A kind of pressure correction method and system of capacitive pressure induction panel - Google Patents
A kind of pressure correction method and system of capacitive pressure induction panel Download PDFInfo
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- CN109117014A CN109117014A CN201710494330.4A CN201710494330A CN109117014A CN 109117014 A CN109117014 A CN 109117014A CN 201710494330 A CN201710494330 A CN 201710494330A CN 109117014 A CN109117014 A CN 109117014A
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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
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
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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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- 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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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Abstract
This application discloses a kind of pressure correction method and system of capacitive pressure induction panel, this method includes being crossed on the surface of capacitive pressure induction panel with the first preset pressure, and acquisition lines streak the capacitance variations data in region；The capacitance variations data that region is streaked using the lines are restored entire panel and taken up an official post any the first capacitor delta data of anticipating；According to the physical location at any point on panel, determine that the first correction coefficient of the point, the pressure value after the correction that first correction coefficient is used to that any point of entire panel to be made to export under the first preset pressure are equal；When with any point of panel described in the pressed by external force less than the first preset pressure, the first correction coefficient corresponding to this point is extracted, exports the pressure value after point correction using the first correction coefficient.The above method and system can guarantee the precision of correction on the basis of high efficiency and high-resolution, correction error be reduced, to guarantee that each position-sensitivity of panel is consistent.
Description
Technical field
The invention belongs to Electronic equipment panel fields, more particularly to a kind of pressure correction of capacitive pressure induction panel
Method and system.
Background technique
For capacitive pressure induction panel in stress, pressure makes it generate physical deformation, the Vertical Square of plane-parallel capacitor
To generation distance change, and the distance change that different location is generated by uniform pressure pressing is not identical, thus each position
The capacitance change of reality output just has biggish difference, and as shown in FIG. 1, FIG. 1 is the different positions of capacitive pressure induction panel
Set the schematic diagram in the distance change generated by identical power, it is seen that the deformation that centre generates is maximum, and closer to edge, then
The deformation of generation is smaller, also higher for the sensitivity of pressure with respect to face plate edge with regard to centre, such as applied to mobile phone
Sensitivity of the panel among the non-timing of pressure, panel is higher than edge sensitivity.
The pressure correction method used in the prior art is the following steps are included: whole screen data are carried out subregion by (1), by panel
All data source segmentations are packaged into n*m data array；(2) data are carried out from each packaged data (hereinafter referred to as Group)
Acquisition；(3) it when pressed by external force panel, is carried out by pressing position and each Group actual samples position apart from calculating, weight is calculated
Press points need the approximation coefficient compensated, the pressure value after being corrected out.
Originally hundreds of data source segmentations are packaged into n*m data array and precision are damaged by existing pressure correction method
It loses；Moreover, characteristic point is fewer after data are packaged, resolution ratio is low, sampling must each Group carry out one acquisition, and it is right
Acquisition position requirement is very high, sampling flexibility is low, and acquisition position such as has to acquisition Group central point；It is weighed using distance
Calculate the data of other points again, such as position of acquisition is there are deviation, and error will be had by correcting result, and precision is about 50%.
Summary of the invention
To solve the above problems, the present invention provides a kind of pressure correction method of capacitive pressure induction panel and being
System can guarantee the precision of correction on the basis of high efficiency and high-resolution, correction error be reduced, to guarantee panel
Each position-sensitivity is consistent.
A kind of pressure correction method of capacitive pressure induction panel provided by the invention, comprising:
It is crossed on the surface of capacitive pressure induction panel with the first preset pressure, the capacitor that acquisition lines streak region becomes
Change data；
The capacitance variations data that region is streaked using the lines, restore entire panel take up an official post anticipate any first capacitor become
Change data；
According to the physical location at any point on panel, the first correction coefficient of the point, first correction coefficient are determined
The pressure value after correction for exporting any point of entire panel under first preset pressure is equal；
When any point to be less than panel described in the pressed by external force of first preset pressure, extract corresponding with the point
The first correction coefficient, using first correction coefficient export the point correction after pressure value.
Preferably, described to incude in capacitive pressure in the pressure correction method of above-mentioned capacitive pressure induction panel
The surface of panel is crossed with the first preset pressure, and acquisition lines streak the capacitance variations data in region are as follows:
One hatched manner is used with the first preset pressure on the surface of capacitive pressure induction panel, acquisition lines streak
The capacitance variations data in region.
Preferably, described to be streaked using the lines in the pressure correction method of above-mentioned capacitive pressure induction panel
The capacitance variations data in region restore entire panel and take up an official post any the first capacitor delta data of anticipating are as follows:
Using polynomial interopolation fitting algorithm, the capacitance variations data in region are streaked using the lines, restore entire surface
The first capacitor delta data at any point on plate.
Preferably, described when to be less than described first in the pressure correction method of above-mentioned capacitive pressure induction panel
When any point of panel described in the pressed by external force of preset pressure, first correction coefficient corresponding to this point is extracted, is utilized
First correction coefficient exports the pressure value after point correction are as follows:
The pressure value after point correction is exported using formula F orceData=SRC*TAG1/TAB1, wherein ForceData
For the pressure value after correction, TAG1 is the corresponding preset correction normalizing value of first preset pressure, and SRC is that the external force is pressed
The stress numerical that panel generates when pressure surface plate, TAB1 are first correction coefficient corresponding to this point.
Preferably, described according to any one on panel in the pressure correction method of above-mentioned capacitive pressure induction panel
The physical location of point, after the first correction coefficient for determining the point, further includes:
It is crossed, is adopted with the second preset pressure for being greater than first preset pressure on the surface of capacitive pressure induction panel
Collect the scribing line of the second preset pressure by the capacitance variations data in region；
Using the scribing line of collected second preset pressure by the capacitance variations data in region, restores entire panel and take up an official post meaning
The the second capacitance variations data of a bit；
According to the physical location at any point on panel, the second correction coefficient of the point, second correction coefficient are determined
The pressure value after correction for exporting any point of entire panel under second preset pressure is equal；
When appointing with panel described in the pressed by external force between first preset pressure and second preset pressure
When anticipating a bit, first correction coefficient corresponding to this point and second correction coefficient are extracted, utilizes first correction
Coefficient and second correction coefficient export the pressure value after point correction.
Preferably, described to utilize first correction in the pressure correction method of above-mentioned capacitive pressure induction panel
Coefficient and second correction coefficient export the pressure value after point correction are as follows:
The pressure after point correction is exported using formula F orceData=TAG1+ (SRC-TAB1) * TAG1/ (TAB2-TAB1)
Force value, wherein ForceData is the pressure value after correction, and TAG1 is that the corresponding preset correction of first preset pressure is returned
One value, the stress numerical that panel generates when SRC is the pressed by external force panel, TAB1 are first correction corresponding to this point
Coefficient, TAB2 are second correction coefficient corresponding to this point.
Preferably, in the pressure correction method of above-mentioned capacitive pressure induction panel, when default to be greater than described second
When any point of panel described in the pressed by external force of pressure, the pressure value after point correction is arranged is second preset pressure pair
The preset correction normalized value answered.
A kind of pressure correction system of capacitive pressure induction panel provided by the invention, comprising:
Acquisition unit, for being crossed on the surface of capacitive pressure induction panel with the first preset pressure, acquisition lines are drawn
Cross the capacitance variations data in region；
Reduction unit is restored entire panel and taken up an official post meaning one for being streaked the capacitance variations data in region using the lines
The first capacitor delta data of point；
Correction coefficient determination unit determines the first correction of the point for the physical location according to any point on panel
Coefficient, after the correction that first correction coefficient is used to that any point of entire panel to be made to export under first preset pressure
Pressure value be equal；
Correct unit, for when be less than first preset pressure pressed by external force described in panel any point when,
The first correction coefficient corresponding to this point is extracted, exports the pressure value after point correction using first correction coefficient.
Preferably, in the pressure correction system of above-mentioned capacitive pressure induction panel, the acquisition unit is used in electricity
The surface of appearance formula pressure sensitive panel uses a hatched manner with the first preset pressure, and the capacitor that acquisition lines streak region becomes
Change data.
Preferably, in the pressure correction system of above-mentioned capacitive pressure induction panel, the reduction unit is for utilizing
Polynomial interopolation fitting algorithm streaks the capacitance variations data in region using the lines, restores entire panel and takes up an official post meaning a bit
First capacitor delta data.
As can be seen from the above description, the pressure correction method of above-mentioned capacitive pressure induction panel provided by the invention and it is
System, since this method includes being crossed on the surface of capacitive pressure induction panel with the first preset pressure, acquisition lines streak area
The capacitance variations data in domain；The capacitance variations data that region is streaked using the lines are restored entire panel and taken up an official post and anticipate a bit
First capacitor delta data；According to the physical location at any point on panel, the first correction coefficient of the point is determined, described first
Pressure value after the correction that correction coefficient is used to that any point of entire panel to be made to export under first preset pressure is homogeneous
Deng；When any point to be less than panel described in the pressed by external force of first preset pressure, corresponding to this point the is extracted
One correction coefficient exports the pressure value after point correction using first correction coefficient, therefore can be in high efficiency and high score
On the basis of resolution, guarantee the precision of correction, correction error is reduced, to guarantee that each position-sensitivity of panel is consistent.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is schematic diagram of the different location in the distance change generated by identical power of capacitive pressure induction panel；
Fig. 2 is the signal of the pressure correction method of the first capacitive pressure induction panel provided by the embodiments of the present application
Figure；
Fig. 3 is the first stroke line schematic diagram for acquiring capacitance variations data；
Fig. 4 is second of stroke line schematic diagrams for acquiring capacitance variations data；
Fig. 5 is the schematic diagram of the first capacitor delta data on the panel restored using differential polynomial fitting algorithm；
Fig. 6 is the contrast schematic diagram of the pressure value of correction front and back；
Fig. 7 is the signal of the pressure correction system of the first capacitive pressure induction panel provided by the embodiments of the present application
Figure；
Fig. 8 is the first situation schematic diagram of panel stresses correction；
Fig. 9 is the second situation schematic diagram of panel stresses correction.
Specific embodiment
Core of the invention thought is to provide a kind of pressure correction method and system of capacitive pressure induction panel, energy
It is enough to guarantee the precision of correction on the basis of high efficiency and high-resolution, correction error is reduced, to guarantee each position of panel
It is consistent to set sensitivity.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The pressure correction method of the first capacitive pressure induction panel provided by the embodiments of the present application is as shown in Fig. 2, Fig. 2
For the schematic diagram of the pressure correction method of the first capacitive pressure induction panel provided by the embodiments of the present application, this method includes
Following steps:
S1: being crossed on the surface of capacitive pressure induction panel with the first preset pressure, and acquisition lines streak the electricity in region
Hold delta data；
Herein it is emphasized that the step has abandoned the data acquisition modes in the prior art got ready, but use
Hatched manner avoids acquisition component pressing and lift motion, to save data acquisition time in this way.But the sampling time
It is mutually restricted with correction accuracy, when actual needs correction accuracy is higher, it is necessary to acquire more data, will result in
Efficiency reduces, and when actual needs quickly test, some correction accuracies must be just reduced, it follows that can be according to reality
The design parameter to determine sampling is needed, is not intended to limit herein.
The example of one specific scribing line sampling can be as shown in figure 3, Fig. 3 be first for acquiring capacitance variations data
One stroke line schematic diagram of kind, it is seen that it is spirally crossed, is drawn always to edge from face plate center position, it is entire to draw
Line process saves a big chunk data acquisition time without leaving panel, this just can be improved data acquisition efficiency,
Certainly this is only one of example, and a hatched manner can be as shown in figure 4, Fig. 4 be for acquiring capacitance variations number
According to second of stroke line schematic diagrams, details are not described herein again, may be otherwise certainly and takes its except a stroke line
He crosses at mode, is not intended to limit herein, moreover, tester table required for entire collection process can use existing machine
Platform, without increasing new equipment, it is further to note that capacitance variations data here can be after pressing panel most directly
Data variation, acquire the progress that this initial data can be more advantageous to subsequent step.But it is not excluded for, scribing line acquisition herein
Capacitance variations data are also possible to original capacitance delta data treated numerical value, but must be with actual capacitance delta data
There is corresponding relationship.
S2: streaking the capacitance variations data in region using the lines, restore entire panel take up an official post anticipate any first electricity
Hold delta data；
Because scribe area is limited to, the data of whole region cannot be collected, such as: it is only capable of collecting 9*15 data, institute
By this step can by the reduction including fit approach in a manner of obtain more data, that is, obtain on panel appoint
It anticipates any first capacitor delta data.
S3: according to the physical location at any point on panel, the first correction coefficient of the point, first correction system are determined
Pressure value after correction of the number for exporting any point of entire panel under first preset pressure is equal；
First correction coefficient determined by this step constitutes a table, and any point on panel has in the table
One corresponding first correction coefficient.
S4: it when any point to be less than panel described in the pressed by external force of first preset pressure, extracts and the point
Corresponding first correction coefficient exports the pressure value after point correction using first correction coefficient.
For example, pressing is that the third line the tenth arranges, then corresponding first correction coefficient in the position is found out from above-mentioned table, just
Correction can be made to output pressure value, so that all having an equal amount of sensitivity in panel any position.
As can be seen from the above description, the pressure correction of the first capacitive pressure induction panel provided by the embodiments of the present application
Method, due to including being crossed on the surface of capacitive pressure induction panel with the first preset pressure, acquisition lines streak region
Capacitance variations data；The capacitance variations data that region is streaked using the lines are restored entire panel and taken up an official post and anticipate any first
Capacitance variations data；According to the physical location at any point on panel, the first correction coefficient of the point, first correction are determined
Pressure value after the correction that coefficient is used to that any point of entire panel to be made to export under first preset pressure is equal；When
Be less than first preset pressure pressed by external force described in panel any point when, extract it is corresponding to this point first correction
Coefficient exports the pressure value after point correction using first correction coefficient, therefore can be in high efficiency and high-resolution
On the basis of, guarantee the precision of correction, correction error is reduced, to guarantee that each position-sensitivity of panel is consistent.
The pressure correction method of second of capacitive pressure induction panel provided by the embodiments of the present application is above-mentioned first
Further include following technical characteristic on the basis of the pressure correction method of kind capacitive pressure induction panel:
The surface in capacitive pressure induction panel is crossed with the first preset pressure, and acquisition lines streak the electricity in region
Hold delta data are as follows:
One hatched manner is used with the first preset pressure on the surface of capacitive pressure induction panel, acquisition lines streak
The capacitance variations data in region.
The pressure correction method of the third capacitive pressure induction panel provided by the embodiments of the present application is above-mentioned first
Further include following technical characteristic on the basis of the pressure correction method of kind capacitive pressure induction panel:
The capacitance variations data that region is streaked using the lines, restore entire panel take up an official post anticipate any first electricity
Hold delta data are as follows:
Using polynomial interopolation fitting algorithm, the capacitance variations data in region are streaked using the lines, restore entire surface
The first capacitor delta data at any point on plate.
It can achieve best reduction effect using this kind of algorithm, can be restored and be appeared by 1% or so channel data
The data at position are not acquired on plate, and this differential polynomial fitting algorithm reduction effect is rounder and more smooth, effect such as Fig. 5 institute
Show, Fig. 5 is the schematic diagram of the first capacitor delta data on the panel restored using differential polynomial fitting algorithm.
The pressure correction method of 4th kind of capacitive pressure induction panel provided by the embodiments of the present application, is above-mentioned first
It further include that following technology is special on the basis of kind is any into the pressure correction method of the third capacitive pressure induction panel
Sign:
It is described when be less than first preset pressure pressed by external force described in panel any point when, extract with the point
Corresponding first correction coefficient exports the pressure value after point correction using first correction coefficient are as follows:
The pressure value after point correction is exported using formula F orceData=SRC*TAG1/TAB1, wherein ForceData
For the pressure value after correction, TAG1 is the corresponding preset correction normalizing value of first preset pressure, and SRC is that the external force is pressed
The stress numerical that panel generates when pressure surface plate, TAB1 are first correction coefficient corresponding to this point.
It is the first situation schematic diagram of panel stresses correction with reference to Fig. 8, Fig. 8, above-mentioned formula is said in citing below
It is bright:
(1) hypothesis panel is 85 by the stress value generated after the first preset pressure, and system can be according to the position of press points
Indexing corresponding TAB1 value (the first correction coefficient) is 85, and is for the preset normalized value of the press points (TAG1 value)
100, then, the pressure value using above-mentioned formula, after obtaining point correction are as follows: ForceData=85*100/85=100 (reference
Lines L1 and point A).
(2) hypothesis panel is 85 by the stress value generated after the first preset pressure, and system can be according to the position of press points
Indexing corresponding TAB1 value is 150, and if the normalized value (TAG1 value) defined before is 120, using above-mentioned public affairs
Formula, the pressure value after point correction are as follows: ForceData=85*120/150=68 (refers to lines L2 and point B).
(3) hypothesis panel is 78 by the stress value generated after the first preset pressure, and system can extract the position of press points
Indexing corresponding TAB1 value is 85, and if being before 100 in the normalized value (TAG value) that TAB1 is defined, using upper
State formula, the pressure value after obtaining point correction is ForceData=78*100/85=91.7 (with reference to lines L1 and point C).
It should be noted that normalized value (TAG1 value) is completely customized, that is to say, that can in above-mentioned formula
The TAG1 value normalizing for any one suitable numerical value, to be not intended to limit herein.There is hundreds of Chanel (channel) on panel
It is uniformly distributed, under the first preset pressure, IC can collect a pressure matrix of the composition of hundreds of Chanel on panel,
The X of each point of panel, Y, Z data source may be constructed a three-dimension curved surface, can count to existing Chanel, such as data whole face
Statistics, partial data statistics, filters out noise, available first capacitor delta data, TAG1 is that client is customized
Normalizing target value.If the panel placed using 100g counterweight (being equal to the first preset pressure mentioned by the present embodiment), and
(SRC statistics can add up around whole channels or portion to the stress value SRC=120 that being pressed of panel a little generates the 100g counterweight
Subchannel), if TAG1 is set as 100, has stored in chip Flash and calculate the point obtained just by formula above
ForceData final result is exactly 100.
After above-mentioned 4th kind of bearing calibration, system not only may recognize that the presence of pressure, but also Forcedata value can
To zoom in or out, when merely desiring to provide the TAB of a calibrated force, aforementioned four kinds of bearing calibrations can be used.Exceeding
The pressure value of first pressing dynamics will do it Overflow handling, directly be corrected to maximum Forcedata (with reference to Fig. 8), and system at present
Regiment commander's width is usually arranged as 1Byte, can identify be up to 255 Forcedata, beyond 255 Forcedata then unify it is aobvious
It is shown as 255.In view of the deficiency, the embodiment of the present application provides the pressure correction method of the 5th kind of capacitive pressure induction panel.
When because being only corrected to a preset pressure, the precision before calibrating (base measuring) pressure value Overflow handling everywhere is consistent, and user is common
Usually and less, lower section embodiment is balanced to be less than common pressing dynamics to the dynamics of pressing dynamics and common maximum pressing dynamics difference
The reaction sensitivity of this section panel of dynamics between pressing dynamics and common maximum pressing dynamics, this reality are commonly used in this section
Applying example is on the basis of the pressure correction method of above-mentioned 4th kind of capacitive pressure induction panel, further includes that following technology is special
Sign:
The physical location according to any point on panel, after the first correction coefficient for determining the point, further includes:
It is crossed, is adopted with the second preset pressure for being greater than first preset pressure on the surface of capacitive pressure induction panel
Collecting the scribing line of the second preset pressure by the capacitance variations data in region, the two preset pressures can be decided according to the actual requirements,
Such as user is often used pressing dynamics as the first preset pressure, using the common maximum pressing dynamics of user as the second default pressure
Power.
Using the scribing line of collected second preset pressure by the capacitance variations data in region, restores entire panel and take up an official post meaning
The the second capacitance variations data of a bit；
According to the physical location at any point on panel, the second correction coefficient of the point, second correction coefficient are determined
The pressure value after correction for exporting any point of entire panel under second preset pressure is equal；
When appointing with panel described in the pressed by external force between first preset pressure and second preset pressure
When anticipating a bit, first correction coefficient corresponding to this point and second correction coefficient are extracted, utilizes first correction
Coefficient and second correction coefficient export the pressure value after point correction.
The pressure correction method of 6th kind of capacitive pressure induction panel provided by the embodiments of the present application, is the above-mentioned 5th
Further include following technical characteristic on the basis of the pressure correction method of kind capacitive pressure induction panel:
It is described that the pressure value after point correction is exported using first correction coefficient and second correction coefficient are as follows:
The pressure after point correction is exported using formula F orceData=TAG1+ (SRC-TAB1) * TAG1/ (TAB2-TAB1)
Force value, wherein ForceData is the pressure value after correction, and TAG1 is that the corresponding preset correction of first preset pressure is returned
One value, the stress numerical that panel generates when SRC is the pressed by external force panel, TAB1 are first correction corresponding to this point
Coefficient, TAB2 are second correction coefficient corresponding to this point.
With reference to Fig. 9, Fig. 9 is the second situation schematic diagram of panel stresses correction, below with specific example to above-mentioned step
Suddenly it is illustrated:
If TAB1 is the matrix that panel is acquired when the first preset pressure value is 200g and fitting data is constituted, TAB2 is face
The plate matrix that acquisition and fitting data are constituted when the second preset pressure value is 500g.
Assuming that it is 255/2 that the TAB1 value that press points are mapped when external force is 200g, which is the setting of 150, TAG1 value, the present embodiment
In be approximately equal to 125 (the point A in Fig. 9), it is 255 that press points, which are 200, TAG2 settings in the TAB2 value mapped when external force is 500g,
(the point B in Fig. 9).
Assuming that external force is 300g (500g > 300g > 200g), stress value SRC is 170, substitutes into data:
ForceData=(255/2)+(170-150) * (255/2)/(200-150)=178.5
Assuming that the external force value given just is 500g, the normalized value of perfect condition lower panel this moment is 200, ForceData
=(255/2)+(200-150) * (255/2)/(200-150)=255.
The present embodiment is balanced to be less than common this section (origin-point A) of pressing dynamics, commonly use pressing dynamics and it is common most
The reaction sensitivity of dynamics (point A- point B) this section panel between big pressing dynamics.
The effect that the correction course of each embodiment obtains is as shown in fig. 6, the comparison signal that Fig. 6 is the pressure value of correction front and back
Figure, in this case, we grab the data for being uniformly distributed in 15 points of panel, and lower part is the data before correction, top
For the data after correction, it is seen then that the consistency after correction at the same pressure is 95% or more.
The pressure correction method of 7th kind of capacitive pressure induction panel provided by the embodiments of the present application, is the above-mentioned 5th
Further include following technical characteristic on the basis of the pressure correction method of kind capacitive pressure induction panel:
When any point to be greater than panel described in the pressed by external force of second preset pressure, after point correction is set
Pressure value be the corresponding preset correction normalized value of second preset pressure.
This is overstep the extreme limit the case where, if panel can bear 1000g, as long as but practical application use 500g, that
Setting as doing one when calibration, 200g correction normalize to 150,500g and correct to 255, because 255 be one
Limiting value, bigger power will be directly classified as 255.
The pressure correction system of the first capacitive pressure induction panel provided by the embodiments of the present application is as shown in fig. 7, Fig. 7
For the schematic diagram of the pressure correction system of the first capacitive pressure induction panel provided by the embodiments of the present application, the system packet
It includes:
Acquisition unit 701 acquires lines for crossing on the surface of capacitive pressure induction panel with the first preset pressure
The capacitance variations data in region are streaked, the program has abandoned the data acquisition modes in the prior art got ready, but uses
Hatched manner avoids acquisition component pressing and lift motion in this way, to save data acquisition time, and when sampling
Between and correction accuracy mutually restrict, when actual needs the higher words of correction accuracy, it is necessary to acquire more data, will
Efficiency is caused to reduce, and when actual needs quickly test, some correction accuracies must be just reduced, it follows that can basis
The design parameter to determine sampling is actually needed, is not intended to limit herein；
Reduction unit 702 is restored entire panel and taken up an official post meaning for being streaked the capacitance variations data in region using the lines
The first capacitor delta data of a bit, it should be noted that the actual capacitance delta data for acquisition of crossing herein is also possible to electricity
Hold delta data treated numerical value, but there must be corresponding relationship with actual capacitance delta data, moreover, because of scribe area
Limitation, cannot collect the data of whole region, such as: it is only capable of collecting 9*15 data, be obtained more so also needing to restore
More data such as generate 18*30 data, and 18*30 data are constituted a matrix, that is, first capacitor variation
Data；
Correction coefficient determination unit 703 determines the first school of the point for the physical location according to any point on panel
Positive coefficient, the correction that first correction coefficient is used to that any point of entire panel to be made to export under first preset pressure
Pressure value afterwards is equal, and identified first correction coefficient constitutes a table, and each point has one corresponding the in the table
One correction coefficient, the factory which is generally placed upon panel production carry out data and collect and record inside IC, so, per a piece of
After panel factory, inside just had the table of this first correction coefficient；
Unit 704 is corrected, for when any point to be less than panel described in the pressed by external force of first preset pressure
When, the first correction coefficient corresponding to this point is extracted, exports the pressure value after point correction using first correction coefficient, it is false
What it is such as pressing is that the third line the tenth arranges, then corresponding first correction coefficient in the position is found out from above-mentioned table, it will be able to pressure
Value makes correction, so that all having an equal amount of sensitivity in panel any position.
The pressure correction system of second of capacitive pressure induction panel provided by the embodiments of the present application is above-mentioned first
Further include following technical characteristic on the basis of the pressure correction system of kind capacitive pressure induction panel:
The acquisition unit is used to use a stroke line on the surface of capacitive pressure induction panel with the first preset pressure
Mode, acquisition lines streak the capacitance variations data in region.
In this case, entire scratching process is without leaving panel, therefore saves a big chunk time, improves
Data acquisition efficiency.
The pressure correction system of the third capacitive pressure induction panel provided by the embodiments of the present application is above-mentioned first
Further include following technical characteristic on the basis of the pressure correction system of kind capacitive pressure induction panel:
The reduction unit is used to utilize polynomial interopolation fitting algorithm, and the capacitance variations in region are streaked using the lines
Data restore entire panel and take up an official post any the first capacitor delta data of anticipating.
It can achieve best reduction effect using this kind of algorithm, restored by 1% or so channel data and do not acquire portion
Point, and this differential polynomial fitting algorithm is rounder and more smooth compared to for linear interpolation algorithm.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of pressure correction method of capacitive pressure induction panel characterized by comprising
It is crossed on the surface of capacitive pressure induction panel with the first preset pressure, acquisition lines streak the capacitance variations number in region
According to；
The capacitance variations data that region is streaked using the lines, restore entire panel take up an official post anticipate any first capacitor variation number
According to；
According to the physical location at any point on panel, determine that the first correction coefficient of the point, first correction coefficient are used for
Pressure value after the correction for exporting any point of entire panel under first preset pressure is equal；
When any point to be less than panel described in the pressed by external force of first preset pressure, corresponding to this point the is extracted
One correction coefficient exports the pressure value after point correction using first correction coefficient.
2. the pressure correction method of capacitive pressure induction panel according to claim 1, which is characterized in that described in electricity
The surface of appearance formula pressure sensitive panel is crossed with the first preset pressure, and acquisition lines streak the capacitance variations data in region are as follows:
One hatched manner is used with the first preset pressure on the surface of capacitive pressure induction panel, acquisition lines streak region
Capacitance variations data.
3. the pressure correction method of capacitive pressure induction panel according to claim 1, which is characterized in that the utilization
The lines streak the capacitance variations data in region, restore entire panel and take up an official post any the first capacitor delta data of anticipating are as follows:
Using polynomial interopolation fitting algorithm, the capacitance variations data in region are streaked using the lines, are restored on entire panel
The first capacitor delta data at any point.
4. the pressure correction method of capacitive pressure induction panel according to claim 1-3, which is characterized in that
It is described when be less than first preset pressure pressed by external force described in panel any point when, extract it is corresponding with the point
First correction coefficient, using first correction coefficient export the point correction after pressure value are as follows:
The pressure value after point correction is exported using formula F orceData=SRC*TAG1/TAB1, wherein ForceData is school
Pressure value after just, TAG1 are the corresponding preset correction normalizing value of first preset pressure, and SRC is the pressed by external force face
The stress numerical that panel generates when plate, TAB1 are first correction coefficient corresponding to this point.
5. the pressure correction method of capacitive pressure induction panel according to claim 4, which is characterized in that
The physical location according to any point on panel, after the first correction coefficient for determining the point, further includes:
It is crossed on the surface of capacitive pressure induction panel with the second preset pressure for being greater than first preset pressure, acquisition the
The capacitance variations data that two preset pressures are crossed by region；
Using the scribing line of collected second preset pressure by the capacitance variations data in region, restores entire panel and take up an official post meaning a bit
The second capacitance variations data；
According to the physical location at any point on panel, determine that the second correction coefficient of the point, second correction coefficient are used for
Pressure value after the correction for exporting any point of entire panel under second preset pressure is equal；
When with any one of panel described in the pressed by external force between first preset pressure and second preset pressure
When point, first correction coefficient corresponding to this point and second correction coefficient are extracted, first correction coefficient is utilized
The pressure value after point correction is exported with second correction coefficient.
6. the pressure correction method of capacitive pressure induction panel according to claim 5, which is characterized in that
It is described that the pressure value after point correction is exported using first correction coefficient and second correction coefficient are as follows:
The pressure after point correction is exported using formula F orceData=TAG1+ (SRC-TAB1) * TAG1/ (TAB2-TAB1)
Value, wherein ForceData is the pressure value after correction, and TAG1 is the corresponding preset correction normalizing of first preset pressure
Value, the stress numerical that panel generates when SRC is the pressed by external force panel, TAB1 are first correction system corresponding to this point
Number, TAB2 are second correction coefficient corresponding to this point.
7. the pressure correction method of capacitive pressure induction panel according to claim 5, which is characterized in that
Pressure when any point to be greater than panel described in the pressed by external force of second preset pressure, after point correction is set
Force value is the corresponding preset correction normalized value of second preset pressure.
8. a kind of pressure correction system of capacitive pressure induction panel characterized by comprising
Acquisition unit, for being crossed on the surface of capacitive pressure induction panel with the first preset pressure, acquisition lines streak area
The capacitance variations data in domain；
Reduction unit is restored entire panel and taken up an official post and anticipate a bit for being streaked the capacitance variations data in region using the lines
First capacitor delta data；
Correction coefficient determination unit determines the first correction coefficient of the point for the physical location according to any point on panel,
Pressure after the correction that first correction coefficient is used to that any point of entire panel to be made to export under first preset pressure
Force value is equal；
Unit is corrected, for extracting when any point to be less than panel described in the pressed by external force of first preset pressure
First correction coefficient corresponding to this point exports the pressure value after point correction using first correction coefficient.
9. the pressure correction system of capacitive pressure induction panel according to claim 8, which is characterized in that the acquisition
Unit is used to use a hatched manner on the surface of capacitive pressure induction panel with the first preset pressure, and acquisition lines streak
The capacitance variations data in region.
10. the pressure correction system of capacitive pressure induction panel according to claim 8, which is characterized in that described to go back
Former unit is used to utilize polynomial interopolation fitting algorithm, and the capacitance variations data in region are streaked using the lines, and reduction is entire
The first capacitor delta data at any point on panel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710494330.4A CN109117014B (en) | 2017-06-26 | 2017-06-26 | Pressure correction method and system for capacitive pressure sensing panel |
| TW106136266A TWI639109B (en) | 2017-06-26 | 2017-10-20 | A pressure correction method and a pressure correction system for a capacitive pressure sensing panel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710494330.4A CN109117014B (en) | 2017-06-26 | 2017-06-26 | Pressure correction method and system for capacitive pressure sensing panel |
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| CN109117014B CN109117014B (en) | 2022-05-10 |
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Also Published As
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| TW201905667A (en) | 2019-02-01 |
| CN109117014B (en) | 2022-05-10 |
| TWI639109B (en) | 2018-10-21 |
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