CN103092421A - Method of touch panel linear error correcting - Google Patents
Method of touch panel linear error correcting Download PDFInfo
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- CN103092421A CN103092421A CN2013100304337A CN201310030433A CN103092421A CN 103092421 A CN103092421 A CN 103092421A CN 2013100304337 A CN2013100304337 A CN 2013100304337A CN 201310030433 A CN201310030433 A CN 201310030433A CN 103092421 A CN103092421 A CN 103092421A
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Abstract
The invention relates to a method of touch panel linear error correcting. A conducting layer is arranged on a touch panel, a plurality of electrodes are arranged on the conducting layer, corresponding curves are compensated according to a touch pressure value when a user scribes a line, and the curves are enabled to be close to straight lines in an ideal condition. The method of the touch panel linear error correcting is not only simple, but also is high in speed of the touch panel linear error correcting, and relatively accurate coordinates are easier to obtain.
Description
Technical field
the present invention relates to a kind of linear error of contact panel, refer in particular to the modification method of capacitance type touch-control panel linear error.
Background technology
touch control display comprises display panel and the contact panel of combination with display panel, uses the mark shown for the touching display panel of user's intuition, and final realization operates computer system fast.In fact, what the user contacted is the contact panel be positioned on display panel, contact panel can feedback one be located signal to computer system, makes computer system convert this positioning signal to coordinate figure, finally this coordinate figure is videoed to the shown image of display panel.
the kind of contact panel comprises electric resistance touch-control panel, capacitance type touch-control panel, electromagnetic touch-control panel etc., because capacitance type touch-control panel can be realized multi-point touch, and is not subject to the impact of external environment, therefore more and more is subject to user's favor.Contact panel generally has by two layers of conductive material and forms conductive layer, between them, be provided with for isolating the insulation course of two conductive layers, when clicking contact panel, add certain voltage on directions X, get the magnitude of voltage of this point from Y-direction, can obtain the coordinate figure of this directions X through converting; In like manner also can draw the coordinate of this Y-axis.In the indices of contact panel, the linearity is of paramount importance one.Owing to being equipped with several electrodes on described conductive layer, under perfect condition, the user is when line, should be a straight straight line, if but the user in when line, if speed is fast not, perhaps pressure is large not, the linearity will be affected so, as the user when drawing straight line, and the curve really demonstrated.Specifically, this situation appears at an electrode between another electrode, and the curve produced may be the below that is positioned at the perfect condition straight line, may be also the top that is positioned at the perfect condition straight line, no matter which kind of situation, be all the problem that the designer need avoid as far as possible.
therefore need to solve above problem for users provide a kind of method of revising the linearity.
Summary of the invention
technical matters to be solved by this invention is how to provide a kind of simply can revise fast the method for touch surface linear error again.
to achieve these goals, the invention provides a kind of method for amending linearity error of touch-control panel, described contact panel is provided with conductive layer, and conductive layer is provided with several electrodes, and its step is as follows: at first define two pressure parameter values, maximal value and minimum value; The size of touching force value when then judgement is rule; If described force value is less than minimum value, the straight line of perfect condition of take is axis of symmetry, compensates one and is the upper curve of mirror image and the corresponding addition of each coordinate on same direction with the curve formed; If described force value is greater than maximal value, the straight line of perfect condition of take is axis of symmetry, compensates one and is the lower curve of mirror image and each respective coordinates addition on same direction with the curve formed; If when described force value between minimum value and maximal value, needs to revise touching according to the size of the height number percent of user's finger pressure, each coordinate of the curve that obtains, make it approach as much as possible the straight line of perfect condition.
compared with prior art, the modification method of contact panel linear error of the present invention, not only simple, and also the speed of correction contact panel linear error is fast, more easily obtains relatively accurate coordinate.
The accompanying drawing explanation
fig. 1 is at the pressure line schematic diagram of hour output according to contact panel of the present invention;
the line schematic diagram of output when Fig. 2 is larger according to contact panel pressure of the present invention;
fig. 3 A-3B is the mode of setting up of the mathematical model of utilizing according to the present invention;
fig. 4 is the relation according to the height number percent of pressure of the present invention and pressure;
fig. 5 is according to contact panel pressure of the present invention revised schematic diagram between maximal value and minimum value.
Specific embodiment
below in conjunction with drawings and Examples, the present invention is further illustrated.
the modification method of contact panel linear error of the present invention, described contact panel is provided with conductive layer, conductive layer is provided with several electrodes, due to the factor that affects the contact panel linearity, the size of pressure determines during mainly by user's finger touches, so wish that the mode by changing force value revises linear error.During at the touch surface lining out, if the pressure when user touches is too small, will cause forming a curve as the user, this curve is positioned at the straight line below of perfect condition, please refer to shown in Fig. 1; If the pressure when user touches is excessive, also will cause forming a curve, this curve is positioned at the straight line top of perfect condition, please refer to shown in Fig. 2.
modification method of the present invention has utilized mathematical model, and it is a kind of, and to set up mode as follows: for the linear error of compensating touch control panel, as the user when drawing straight line, it is that curve is example above ideal line that the user of take touches the image formed after contact panel, please refer to shown in Fig. 3 A and 3B, successively the order three electrodes between, set up coordinate system, take and be positioned at target as initial point, calculate the ultimate range d of described curve offset ideal line, determined the input value D of described curve by ultimate range d, using described input value D as horizontal ordinate, ultimate range d by described curve offset ideal line determines corresponding compensated curve again, thereby each coordinate of formed curve after the touching contact panel is made to its straight line close to perfect condition with the corresponding addition of each coordinate of compensated curve.
based on said circumstances, the present invention has utilized compensation principle, if the user is when drawing straight line, the image formed is that curve is below the straight line of perfect condition, if the straight line of perfect condition of take is axis of symmetry, compensate one and be the upper curve of mirror image with this curve, and the corresponding addition of each coordinate on same direction, and then make its straight line close to perfect condition; If the curve formed, above the straight line of perfect condition, if take the straight line of perfect condition is axis of symmetry, compensates one and is the lower curve of mirror image with this curve, and each coordinate correspondence addition on same direction, and then makes its straight line close to perfect condition.
as the user during at the touch surface lining out, what perfect condition was showed should be the bar straight line, and formed by a series of point because straight line is actually, and the coordinate of each point can be detected and draws, therefore each coordinate that will touch formed curve after contact panel with compensate after the corresponding addition of each coordinate of curve, by corresponding each coordinate of two curves of addition, and then just can obtain approaching most the straight line of perfect condition.While touching due to the user, the size of pressure causes the image that demonstrates and the straight line of perfect condition that deviation is arranged, therefore need to be revised described image, make its straight line close to perfect condition, and after revising, each coordinate figure on curve is all relevant with the coordinate figure of being detected by current curves and correction factor.
please refer to shown in Fig. 4, because the user is relevant with the size of pressure when the described touch surface lining out, in conjunction with above-mentioned compensation principle, pressure size while therefore touching according to the user can be selected different modification methods, and the size of pressure is relevant with the height number percent (high/low%) of user's finger pressure, therefore just can revise the coordinate of current detecting according to the height number percent of user's finger pressure, at first define two pressure parameter values: pressure minimum value a (min) and pressure maximal value a (max), the size of pressure value P after the judgement touching, if described pressure value P is less than minimum value a (min), the straight line of perfect condition of take is axis of symmetry, compensate the upper curve that a curve with formation is mirror image, and each coordinate addition respectively on same direction, if described pressure value P is greater than maximal value a (max), the straight line of perfect condition of take is axis of symmetry, compensates one and is the lower curve of mirror image and each coordinate addition respectively on same direction with the curve formed, if described force value is positioned between minimum value a (min) and maximal value a (max), while needing to revise touching according to the size of the height number percent of user's finger pressure, each coordinate of the curve that obtains, make it approach as much as possible the straight line of perfect condition.
if after touching, pressure value P is positioned between minimum value a (min) and maximal value a (max), and in the time of between minimum value a (min) and mean value a0, described mean value a0 be according to maximal value a (max) and minimum value a (min) and half determine, now pressure height number percent is less than one, so the image formed when the user rules is positioned at the below of ideal line, and the deviation oscillation that deviation oscillation is less than minimum value a (min) time institute forming curves than described pressure value P is little, formed curve when the more described pressure value P of curve now is less than minimum value a (min), more approach the perfect condition straight line, if after touching, pressure value P is between mean value a0 and maximal value a (max), now pressure height number percent is greater than one, so the image formed when the user rules is positioned at the top of ideal line, and when deviation oscillation is greater than maximal value a (max) than described pressure value P, the deviation oscillation of the image that forms is little, formed curve when the more described pressure value P of curve now is greater than minimum value a (max), more approach the perfect condition straight line.
below introduce in detail more a kind of correction algorithm when force value is positioned between minimum value a (min) and maximal value a (max): please refer to shown in Fig. 5, if described force value is positioned between minimum value a (min) and maximal value a (max), curve F1 and two kinds of situations of reclinate curve F2 that now the user is bent upwards can figure occur with the pressure size when the touch surface lining out in, in fact occurred differing larger curve F1 and F2 with the perfect condition straight line, for above-mentioned curve is revised respectively, need first to calculate the number percent R of finger pressure height, and R=[P-minimum value a (min)] * C/[maximal value a (max)-minimum value a (min)], wherein C is the constant relevant with DPI, then calculate revised coordinate r, and r=[(R*distH)+(C-R) * distL]/C, wherein dstH and distL are for revising constant, and described correction constant obtains according to the current coordinate of the curve correspondence of tabling look-up, form revised image according to above-mentioned formula shown in dotted line, be curved F1` after curve F1 revises, curved F2` after curve F2 revises, revised curve is obviously closer to the straight line of perfect condition.
above-mentionedly introduced a kind of correction algorithm when force value is positioned between minimum value a (min) and maximal value a (max), height number percent based on user's finger pressure, can also revise with other algorithm, as long as meet, make the image of its formation closer to the straight line under perfect condition.
the modification method of contact panel linear error of the present invention, not only simple, and also the speed of correction contact panel linear error is fast, more easily obtains relatively accurate coordinate, therefore is worthy of popularization.
Claims (10)
1. the modification method of a contact panel linear error, described contact panel is provided with conductive layer, and conductive layer is provided with several electrodes, and its step is as follows: at first define two pressure parameter values, maximal value and minimum value; The size of touching force value when then judgement is rule; If described force value is less than minimum value, the straight line of perfect condition of take is axis of symmetry, compensates one and is the upper curve of mirror image and the corresponding addition of each coordinate on same direction with the curve formed; If described force value is greater than maximal value, the straight line of perfect condition of take is axis of symmetry, compensates one and is the lower curve of mirror image and each respective coordinates addition on same direction with the curve formed; If when described force value between minimum value and maximal value, needs to revise touching according to the size of the height number percent of user's finger pressure, each coordinate of the curve that obtains, make it approach as much as possible the straight line of perfect condition.
2. the modification method of contact panel linear error as claimed in claim 1, it is characterized in that: if described force value between minimum value and maximal value the time, the size of the number percent of described finger pressure height is relevant with maximal value, minimum value and the constant of described pressure.
3. the modification method of contact panel linear error as claimed in claim 1 is characterized in that: described current coordinate is with to revise constant and constant relevant.
4. as the modification method of contact panel linear error as described in claim 2 or 3, it is characterized in that: described constant is the constant relevant with DPI.
5. the modification method of contact panel linear error as claimed in claim 1 or 2, it is characterized in that: if described force value is less than minimum value, the curve formed is positioned at the below of perfect condition straight line.
6. the modification method of contact panel linear error as claimed in claim 1 or 2, it is characterized in that: if described force value is greater than maximal value, the curve formed is positioned at the top of perfect condition straight line.
7. the modification method of contact panel linear error as claimed in claim 1, it is characterized in that: described modification method has utilized mathematical model.
8. the modification method of contact panel linear error as claimed in claim 7, it is characterized in that: described mathematical model to set up mode as follows: on described contact panel successively between three electrodes of order, set up coordinate system, take and be positioned at target as initial point, the ultimate range of the curve offset ideal line that the calculating user forms when the touch surface lining out, determined the input value of described curve by ultimate range, using described input value as horizontal ordinate, then determine corresponding compensated curve by the ultimate range of described curve offset ideal line.
9. the modification method of contact panel linear error as claimed in claim 1, it is characterized in that: if described touching force value is between minimum value and maximal value, and in the time of between minimum value and mean value, described mean value be according to maximal value and minimum value and half determine, now pressure height number percent is less than one, so the image formed when the user rules is positioned at the below of ideal line, and deviation oscillation is little than the deviation oscillation of described force value time that is less than minimum value institute's forming curves.
10. the modification method of contact panel linear error as claimed in claim 1, it is characterized in that: if described touching force value is between minimum value and maximal value, and in the time of between mean value and maximal value, described mean value be according to maximal value and minimum value and half determine, now pressure height number percent is greater than one, so the image formed when the user rules is positioned at the top of ideal line, and deviation oscillation while than described force value, being greater than maximal value the deviation oscillation of the image that forms little.
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| CN106155407A (en) * | 2015-05-11 | 2016-11-23 | 高深公司 | Pressure sensor device, pressure detector and include these device |
| CN106843577A (en) * | 2017-01-13 | 2017-06-13 | 努比亚技术有限公司 | Pressure sensitivity touch control method and terminal |
| CN107957804A (en) * | 2016-10-14 | 2018-04-24 | 奕力科技股份有限公司 | Three-dimensional touch device |
| CN105739776B (en) * | 2016-01-29 | 2018-05-29 | 广东欧珀移动通信有限公司 | A kind of calibration method of pressure value, device and mobile terminal |
| CN111380650A (en) * | 2020-06-01 | 2020-07-07 | 深圳市千分一智能技术有限公司 | Pressure curve calibration method, device, equipment and readable storage medium |
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| CN111380650A (en) * | 2020-06-01 | 2020-07-07 | 深圳市千分一智能技术有限公司 | Pressure curve calibration method, device, equipment and readable storage medium |
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| CN103092421B (en) | 2018-09-14 |
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