CN103853390A - Method for improving touch precision of infrared touch screen - Google Patents
Method for improving touch precision of infrared touch screen Download PDFInfo
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- CN103853390A CN103853390A CN201210515195.4A CN201210515195A CN103853390A CN 103853390 A CN103853390 A CN 103853390A CN 201210515195 A CN201210515195 A CN 201210515195A CN 103853390 A CN103853390 A CN 103853390A
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Abstract
The invention relates a method for improving the touch precision of an infrared touch screen. Two groups of scanning lines with different inclination angles are adopted, the number of regions, shielded by touch points, of the group of scanning lines is determined according to the shielded condition of each group of scanning lines by the touch points, and one greater value of the shielded region of the two groups of scanning lines is selected as the actual touch point number, so the occurrence of the condition of regarding the two touch points as one touch point by mistake can be avoided. In addition, the starting boundary and the termination boundary of each touch point can be determined according to the shielded condition of the first group of scanning lines, then, the width value of each touch point can be determined according to the shielded condition of the second scanning lines, the respective starting boundaries and termination boundaries of the two touch points are determined, the two touch points are distinguished, the problem of merging of the two touch points due to insufficient scanning space is solved, and the touch precision of the infrared touch screen is improved.
Description
Technical field
The present invention relates to a kind of method that improves infrared touch panel touch precision, belong to microprocessor control technology field, be particularly useful for the detection technique field, touch point of infrared touch panel.
Background technology
Infrared touch panel of the prior art, in touch surveyed area surrounding, infrared tube array is installed, this infrared tube array comprises infrared transmitting tube and infrared receiving tube, infrared transmitting tube and infrared receiving tube are corresponding one by one, and at a time only have an infrared transmitting tube transmitting infrared light by sequential control circuit control, the infrared receiving tube of answering in contrast receives this infrared light.Thereby, at any one time, if detect that a certain infrared receiving tube does not receive infrared light, can judge the corresponding infrared light touched point of luminous infrared transmitting tube of this moment and infrared receiving tube and block.When have touch objects in touch detection zone time, infrared light between infrared transmitting tube and the infrared receiving tube thing that is touched stops, infrared receiving tube can not receive the infrared light of infrared transmitting tube transmitting, do not receive the infrared receiving tube and the Infrared (sweep trace) that corresponding infrared transmitting tube just can obtain being blocked of infrared light, therefore can determine the initial border of touch objects and stop border according to the position of the Article 1 Infrared (sweep trace) being blocked and the position of the last item Infrared (sweep trace) being blocked.
In actual application, the light beam that the infrared light that infrared transmitting tube sends is divergent state.As shown in Figure 1, the middle thicker light axial principal ray of light beam for this reason in the infrared beam of infrared transmitting tube transmitting, the light of axial principal ray both sides is Off-axis-light.Existing infrared touch panel is in the time of definite touch objects positional information, can select the infrared receiving tube corresponding with the light main shaft of infrared transmitting tube to coordinate with it, determine the positional information (being designated hereinafter simply as main shaft scan mode) of touch point horizontal and vertical after scanning one by one like this.The method, in the time of identification single-point touches, can obtain result comparatively accurately.But the in the situation that of two or more touch points, only adopt main shaft scan mode can produce pseudo-touch point, as shown in Figure 2, wherein A and C are real touch point, and simple main shaft scan mode can judge that A, B, C, D are touch points, the precision of the touch precision that makes infrared touch panel in the time of two or more touch points received impact.
In order to identify multiple touch points, the general following steps that adopt in prior art: the scope of blocking according to axial principal ray touched point, obtain the accurate touch point boundary information of (comprising true touch point and pseudo-touch point); The scope of blocking according to Off-axis-light touched point again, removes as touch point.So-called from axle scanning, adopt Off-axis-light to scan touching detection zone, the infrared transmitting tube of also launching infrared light and the infrared receiving tube of reception infrared light have the situation of different light main shafts.A kind of method of identifying multiple touch points on infrared touch panel as disclosed in patent documentation CN 101320307A.In the method, after obtaining accurate touch point A, B, C, D, in order to reject pseudo-touch point B and D, adopt and scan from axle scan mode by main shaft scan mode, this kind of mode also has specific definition and description in above-mentioned document, do not explain at this.By after axle scanning, if there is the region that infrared light can be through A and C, can illustrate that B point and D point are pseudo-touch point, reject thus pseudo-touch point B and D, thus the touch precision of raising infrared touch panel.
Touch although can get rid of in such scheme the pseudo-touch point producing while having more than two and two touch point in surveyed area, improve to a certain extent the precision of touch-screen, but in actual application, likely there are two touch points in the horizontal or longitudinally on the closer situation of distance.Two touch point T as shown in Figure 3
1and T
2due to close together in the vertical, while adopting in the vertical main shaft scanning to determine accurate touch point, due to two touch points, distance is closer in the vertical, two regions of region synthesis that block touch point, therefore in this case, only adopt main shaft scanning can not distinguish in the vertical two check points, if when close together, also may there is identical problem in the horizontal in two touch points.And for user, while thinking two touch points by mistake a touch point, there will be the problem of touch point jump shake, impression is write in impact.And in such scheme, only provided in the time that two touch points are distant, how to reject the method for pseudo-touch point.And when two touch points are laterally or when longitudinally, distance is very near, it does not have to obtain respectively the method for each touch point boundary information, cannot distinguish two touch points, touches precision and still can not satisfy the demands.
Summary of the invention
It is when touching in surveyed area two touch points when very near in prior art that the present invention will solve, cannot obtain the technical matters that the boundary information of each touch point makes a distinction two touch points, thereby provide raising infrared touch panel that two touch points of a kind of effective differentiation obtain each touch point boundary information to touch the method for precision.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
Improve the method that infrared touch panel touches precision, comprise the steps:
S1: longitudinally scanning touching surveyed area:
Selection has first group of sweep trace at the first inclination angle, and the scope of blocking according to each touch point to described first group of sweep trace is obtained the longitudinal initial border M in each touch point
ia, stop border M
iband the width W of each touch point
i, and according to longitudinal initial border with stop the number on border and determine the number i of touch point, wherein i≤2;
Selection has second group of sweep trace at the second inclination angle, and the scope of blocking according to each touch point to described second group of sweep trace is obtained each touch point at longitudinal initial border N
ja, stop border N
jband the width U of each touch point
j, and according to longitudinal initial border with stop the number on border and determine the number j of touch point, wherein j≤2;
S2: the touch point number i relatively obtaining according to described first group of sweep trace scope of blocking and the touch point number j obtaining according to described second group of sweep trace scope of blocking;
If i=1, j=2, touches and have two touch points in surveyed area, and longitudinal initial border of first touch point is M
1a, termination border is M
1a+ U
1; Longitudinal initial border of second touch point is M
1b-U
2, termination border is M
1b;
If i>=j, touches and have i touch point in surveyed area, and longitudinal initial border, each touch point is M
ia, termination border is M
ib;
S3: in the horizontal, repeating step S1 and step S2, obtain touching the number of touch point in surveyed area, and the horizontal initial border of each touch point and stop border;
S4: in conjunction with described step S2 and described step S3, different touch points is distinguished in the initial border according to each touch point on horizontal and vertical and stop border on horizontal and vertical.
Preferably, described first group of sweep trace is axial principal ray, and described second group of sweep trace is Off-axis-light.
Alternatively, described step S1 is in the following way:
By main shaft scan mode, adopt axial principal ray to scan touching surveyed area; Obtain the longitudinal initial border M in each touch point
ia, stop border M
iband the width W of each touch point
i;
By from axle scan mode, adopt Off-axis-light to scan touching surveyed area; Obtain the longitudinal initial border N in each touch point
ja, stop border N
jband the width U of each touch point
j.
Alternatively, described step S1 is in the following way:
Scan mode by one-to-many scans touching surveyed area, and selection axial principal ray is wherein as described first group of sweep trace, and selection one group of Off-axis-light is wherein as described second group of sweep trace.
Alternatively, described step S1 is in the following way:
By the scan mode of one-to-many, longitudinally scan touching surveyed area;
Take infrared transmitting tube one end as benchmark, the first initial line circle that the Article 1 sweep trace that touched point is blocked is this touch point, the first termination border that the last item sweep trace is this touch point;
Take infrared receiving tube one end as benchmark, the second initial border that the Article 1 sweep trace that touched point is blocked is this touch point, the second termination border that the last item sweep trace is this touch point;
The along slope coordinate of the intersection point on each touch point the first initial line circle and the second initial border is the longitudinal initial border M of this touch point
ia; It is M that each touch point first stops the longitudinal termination border that border and the second along slope coordinate of intersection point that stops border are this touch point
ib.
Technique scheme of the present invention has the following advantages compared to existing technology:
(1) raising infrared touch panel of the present invention touches the method for precision, adopt situation that two groups of sweep trace touched point with different angle are blocked to determine the number of touch point, owing to adopting the result difference of different angle sweep trace scanning, take first group of sweep trace wherein as benchmark, in the time that the circumstance of occlusion by this group light can not be distinguished the border of two touch points, can only obtain border, one group of touch point, can distinguish according to the circumstance of occlusion of second group of sweep trace the border of two touch points, can the frontier district, one group of touch point obtaining according to first group of sweep trace be divided into two groups according to the scanning result of second group of sweep trace so, so just, can avoid only thinking two touch points by mistake to be the situation appearance of a touch point according to the circumstance of occlusion of first group of sweep trace.Touch objects is generally finger touch or nib, and therefore touch point is all circular substantially, and circular Ge Xiang visual angle, touch point is all identical.And, to touching detection zone while scanning, employing be all parallel sweep trace.The definite touch point width of scope of the touch point width that the scope of the first group of sweep trace therefore blocking according to touch point is definite and the second group of sweep trace blocking according to touch point should be identical in theory.So, the situation that can be blocked according to first group of sweep trace is completely determined behind the region that touched point blocks, the width value of each touch point of determining in conjunction with situation about being blocked according to second group of sweep trace again, determine initial border separately, two touch points and stop border, by the frontier district of two touch points separately, solve the problem of two touch points merging that produce because sweep span is not enough, improved the touch precision of infrared touch panel.
(2) raising infrared touch panel of the present invention touches the method for precision, and in order to simplify type of drive, can select first group of sweep trace is axial principal ray, and second group of sweep trace is Off-axis-light.
(3) raising infrared touch panel of the present invention touches the method for precision, can select man-to-man main shaft scan mode and man-to-manly obtain the number of touch point and the initial border of each touch point, stop border from axle scan mode, adopt man-to-man scan mode, make the control sequential of infrared transmitting tube simply, and obtain the boundary information of touch point and obtain the calculating of accurate touch point according to boundary information also fairly simple according to scanning result.
(4) raising infrared touch panel of the present invention touches the method for precision, can adopt the scan mode of one-to-many to scan, therefrom select axial principal ray as first group of sweep trace, therefrom select suitable Off-axis-light as second group of sweep trace, adopt the scan mode of one-to-many, can reduce the scan period, improve running efficiency of system.
(5) raising infrared touch panel of the present invention touches the method for precision, adopt the scan mode of one-to-many to scan touching surveyed area, and respectively take infrared transmitting tube and infrared receiving tube as benchmark, obtain two initial borders and two termination borders of touch point, take the intersection point on two initial borders as initial border, take two intersection points that stop border as stopping border, adopt aforesaid way, determine border, touch point with respect to the light being blocked by one, can obtain boundary information more accurately, improve and touch precision.
Accompanying drawing explanation
For content of the present invention is more likely to be clearly understood, below in conjunction with accompanying drawing, the present invention is further detailed explanation, wherein,
Fig. 1 is the structural representation of infrared touch panel of the present invention;
Fig. 2 is that two touch points far away of the present invention produce the schematic diagram of pseudo-touch point in the time that main shaft scans; Fig. 3 is the schematic diagram that two nearer touch points of fore-and-aft distance of the present invention are mistaken for a touch point after horizontal main shaft scanning;
Fig. 4 is the horizontal schematic diagram of determining initial border, termination border and the width of two touch points from axle scanning of the present invention;
Fig. 5 is that longitudinal coboundary, two touch points of the present invention coordinate is determined mode;
Fig. 6 is the schematic diagram that longitudinal initial border, touch point and termination border are determined in the scanning of one-to-many of the present invention.
Wherein, Reference numeral is:
11-infrared transmitting tube, 12-infrared receiving tube.
Embodiment
Before the invention will be further described in conjunction with the embodiments, parameter related in the application is done to following explanation:
The present embodiment provides a kind of method that improves infrared touch panel touch precision, comprises the steps:
S1: select to have first group of sweep trace at the first inclination angle, the scope of blocking according to each touch point to described first group of sweep trace, obtains the longitudinal initial border M in each touch point
ia, stop border M
iband the width W of each touch point
i, and according to longitudinal initial border with stop the number on border and determine the number i of touch point, wherein i≤2; Selection has second group of sweep trace at the second inclination angle, and the scope of blocking according to each touch point to described second group of sweep trace is obtained each touch point at longitudinal initial border N
ja, stop border N
jband the width U of each touch point
j, and according to longitudinal initial border with stop the number on border and determine the number j of touch point, wherein j≤2;
The number in the region that the touched point of when " according to longitudinal initial border and stop the number on border and determine the number of touch point " is actually according to infrared touch panel longitudinal scanning in this step, the circumstance of occlusion of sweep trace/sweep trace being obtained is blocked not is the accurate touch point that obtains in conjunction with the circumstance of occlusion of vertical and horizontal upper tracer or the number of true touch point;
In the application, the initial border M of each touch point
iaor N
ja/ termination border M
ibor N
jbthe position coordinates of the corresponding infrared transmitting tube 11 of Article 1 sweep trace/the last item sweep trace blocking by this touch point and the position coordinates of infrared receiving tube 12 embody; Wherein can, the horizontal frame of infrared transmitting tube 11 and the intersection point of longitudinal frame to be installed as true origin, represent the position coordinates of infrared transmitting tube 11/ infrared receiving tube 12 according to the sequence number of infrared transmitting tube 11/ infrared receiving tube 12.If transversely the number of infrared transmitting tube 11 and infrared receiving tube 12 is h, the number that longitudinally goes up infrared transmitting tube 11 and infrared receiving tube 12 is v; Transversely the position of m infrared transmitting tube 11 can represent with (m, 0), and the position of a infrared receiving tube 12 can be with (a, v) represents; Longitudinally the position of upper n infrared transmitting tube 11 can use (0, n) represent, the position of b infrared receiving tube 12 can use (h, b) represent; Therefore, after having determined the position coordinates of the corresponding infrared transmitting tube 11 of Article 1 sweep trace/the last item sweep trace that is blocked and infrared receiving tube 12, just can determine according to the position coordinates of infrared transmitting tube 11 and infrared receiving tube 12 initial border/termination border of touch point.For example, infrared transmitting tube 11 sequence numbers corresponding to horizontal initial border are (m, 0), and infrared receiving tube 12 sequence numbers are (a, v), horizontal initial border line correspondence: y=x*v/(a-m).If adopt be axial principal ray, infrared transmitting tube 11 sequence numbers corresponding to horizontal initial border are (m, 0), infrared receiving tube 12 sequence numbers be (m, v), horizontal initial border line correspondence x=m.And initial border, each touch point and stop vertical range between border these two straight lines and be the width W of this touch point
i, U
j.
The first inclination angle refers to angle between first group of sweep trace and the main shaft positive dirction being parallel to each other (get the direction of major axes orientation from infrared transmitting tube 11 to infrared receiving tube 12 for just); The second inclination angle refers to the angle between second group of sweep trace and the main shaft positive dirction being parallel to each other.
Principle of the present invention for convenience of description, selecting in the present embodiment described first group of sweep trace is axial principal ray, the first inclination angle is the situation of " 0 ", as shown in Figure 3; Described second group of light is Off-axis-light, as shown in Figure 4.Obviously, adopt two groups of Off-axis-lights with different angle, or adopt Off-axis-light also can realize goal of the invention of the present invention as first group of light, axial principal ray as second group of light.It should be noted that, in the time that employing scans from axle, distance, angle etc. between infrared transmitting tube 11 and infrared receiving tube 12 are had to certain requirement, can according to factors such as the sizes of product manual, touch-screen or come by experiment to determine the maximum deviation position allowing.Owing to applying in the prior art much from axle scan mode, and the patent documentation of quoting in background technology also has been described in detail it, and this does not repeat.
As shown in Figure 3, touch in detection zone and have two touch point T
1and T
2, because distance is very near in the vertical, in the time adopting axial principal ray to scan, according to the infrared light being blocked, can only obtain touch point, i.e. an i=1; The initial border of this touch point is M
1a, termination border is M
1b, and the width of this touch point is W in the vertical
1=M
1b-M
1a(this sentences arrow and represents positive dirction, take longitudinal frame of touch-screen installation infrared power valve 11 and laterally the intersection point place of frame as initial point); As shown in Figure 4, by after axle scanning, can obtain infrared light from touch point T
1with touch point T
2between pass, according to the infrared light being blocked, determine the number j=2 of touch point, wherein the initial border of first touch point is N
1a, stop border N
1b, width is U
1; The initial border of second touch point is N
2a, stop border N
2b, width is U
2;
S2: the touch point number i relatively obtaining according to the described axial principal ray scope of blocking and the touch point number j obtaining according to the described Off-axis-light scope of blocking;
One of ordinary skill in the art will appreciate that, the distance between two touch points is different with angle, and the comparative result that may occur is also different.
Be the situation of i=1, j=2 as shown in Figure 3 and Figure 4, touch and in surveyed area, have two touch points, and longitudinal initial border of first touch point be M
1a, termination border is M
1a+ U
1; Longitudinal initial border of second touch point is M
1b-U
2, termination border is M
1b, as shown in Figure 5.Longitudinal border of two touch points all can be decided thus;
Outside above-mentioned situation, for example i=j=1(only has the situation of a touch point), i=j=2(i.e. two situations that touch point is distant), i=2, j=1(two touch points from direction of principal axis close together, for thinking the situation of a touch point by mistake), the scope that above-mentioned three kinds of situations can be blocked according to axial principal ray is directly determined the boundary information of each touch point, also touch and in surveyed area, have i touch point, and longitudinal initial border, each touch point is M
ia, termination border is M
ib;
S3: in the horizontal, repeating step S1 and step S2, obtain touching the number of touch point in surveyed area, and the horizontal initial border of each touch point and stop border;
S4: in conjunction with described step S2 and described step S3, different touch points is distinguished in the initial border according to each touch point on horizontal and vertical and stop border on horizontal and vertical.
In such scheme, if the number of obtaining occlusion area according to the circumstance of occlusion of axial principal ray is less than the number of the occlusion area obtaining according to the circumstance of occlusion of Off-axis-light, the occlusion area on main shaft is divided into two regions by the width of the touch point so just obtaining according to the circumstance of occlusion of Off-axis-light, thereby distinguish border and the width information of two touch points on major axes orientation, as the basis of follow-up identification true touch point, method described in the present embodiment can be obtained boundary information accurately, therefore can improve follow-up touch recognition precision.In actual touch recognition process, after obtaining the border and width information of the touch point on horizontal and vertical, can obtain the accurate touch point that comprises true touch point and pseudo-touch point according to the crossing combination on the border of horizontal and vertical upper touch point, then take certain algorithm to remove pseudo-touch point in conjunction with other scan-data, thereby obtain true touch point position and size information, realize the process of touch recognition.Owing to obtaining the method for accurate touch point according to the crossing combination on the border of horizontal and vertical upper touch point and being prior art according to the method that scan-data is removed pseudo-touch point, repeat no more here.
It should be noted that, in the time that touch point is circle, it is respectively identical to visual angle, and in the time scanning from axle, all adopt parallel infrared light to scan, the width information of the touch point therefore obtaining is identical with the width of touch point on major axes orientation, so can directly will scan the width value obtaining from axle as major axes orientation touch point width value.Even at some in particular cases, touch point is oval or other irregular shapes, directly the touch point width obtaining from axle scanning is applied to the width as touch point on major axes orientation, may be with serving small error, but compared with cannot distinguishing two touch points in prior art, still can improve to a great extent touch precision.
embodiment 2
First the present embodiment, as the selectable embodiment of one of embodiment 1, in described step S1, can pass through main shaft scan mode, adopts axial principal ray to scan touching surveyed area, obtains the longitudinal initial border M in each touch point
ia, stop border M
iband the width W of each touch point
i; Then by from axle scan mode, adopt Off-axis-light to scan touching surveyed area; Obtain the longitudinal initial border N in each touch point
ja, stop border N
jband the width U of each touch point
j.Scan by main shaft respectively and obtain border and the width information of touch point on horizontal and vertical from axle scanning twice sweep.Obtain accurate touch point according to the boundary information on horizontal and vertical, then can obtain in conjunction with other scan-datas position and the size information of true touch point.
In the present embodiment, all adopt man-to-man scan mode, make the control sequential of infrared transmitting tube simple.
embodiment 3
The present embodiment is as the selectable embodiment of one of embodiment 1, described step S1 also can scan touching detection zone by the scan mode of one-to-many, selection axial principal ray is wherein as described first group of sweep trace, and selection one group of Off-axis-light is wherein as described second group of sweep trace.The present embodiment adopts the scan mode of one-to-many, in a touch recognition process, only needs single pass, can reduce the scan period, improves running efficiency of system.
embodiment 4
The present embodiment is as the selectable scheme of one of embodiment 1, described step S1 in the following way:
By the scan mode of one-to-many, longitudinally scan touching surveyed area;
Take infrared transmitting tube one end as benchmark, the light that is same infrared transmitting tube transmitting is received by many infrared receiving tubes, the first initial line circle that the Article 1 sweep trace that touched point is blocked is this touch point, the first termination border that the last item sweep trace is this touch point;
Take infrared receiving tube one end as benchmark, be the light that same infrared receiving tube receives many infrared transmitting tube transmittings, the second initial border that the Article 1 sweep trace that touched point is blocked is this touch point, the second termination border that the last item sweep trace is this touch point;
The along slope coordinate of the intersection point on each touch point the first initial line circle and the second initial border is the longitudinal initial border M of this touch point
ia; It is M that each touch point first stops the longitudinal termination border that border and the second along slope coordinate of intersection point that stops border are this touch point
ib.
Below in conjunction with accompanying drawing 6, the above-mentioned embodiment of the present embodiment is described.
The scan mode of one-to-many refers to: the infrared light of an infrared transmitting tube transmitting can be received by multiple infrared receiving tubes.In the time scanning, can scan successively by infrared transmitting tube of driving circuit control multiple infrared receiving tubes of the infrared light that receives this infrared transmitting tube transmitting.Correspondingly, each only infrared reception can manage the infrared light that receives the transmitting of multiple infrared transmitting tubes.
As shown in Figure 6, by the scan mode of one-to-many, first take infrared transmitting tube one end as benchmark, after completing according to the scanning direction of arrow indication in figure, what Article 1 be blocked is the sweep trace between No. 01 infrared transmitting tube and 01 ' number infrared receiving tube, and it is the first initial line circle; What the last item was blocked is the sweep trace between No. 03 infrared transmitting tube and 03 ' number infrared receiving tube, and it is the first termination border; If take infrared receiving tube one end as benchmark, after completing according to the scanning direction of arrow indication in figure, what Article 1 be blocked is sweep trace between 02 ' number infrared receiving tube and No. 02 infrared transmitting tube, it is the second initial border, what the last item was blocked is the sweep trace between 04 ' number infrared receiving tube and No. 04 infrared transmitting tube, and it is the second termination border; Using the ordinate initial border M longitudinal as touch point of the intersection point on the first initial line circle and the second initial border
ia; In like manner, stop the ordinate termination border M longitudinal as touch point of the intersection point on border using the first termination border and second
ib.
Obviously, above-described embodiment is only for example is clearly described, and the not restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all embodiments.And the apparent variation of being extended out thus or variation are still among the protection domain in the invention.
Claims (5)
1. improve the method that infrared touch panel touches precision, it is characterized in that, comprise the steps:
S1: longitudinally scanning touching surveyed area:
Selection has first group of sweep trace at the first inclination angle, and the scope of blocking according to each touch point to described first group of sweep trace is obtained the longitudinal initial border M in each touch point
ia, stop border M
iband the width W of each touch point
i, and according to longitudinal initial border with stop the number on border and determine the number i of touch point, wherein i≤2;
Selection has second group of sweep trace at the second inclination angle, and the scope of blocking according to each touch point to described second group of sweep trace is obtained each touch point at longitudinal initial border N
ja, stop border N
jband the width U of each touch point
j, and according to longitudinal initial border with stop the number on border and determine the number j of touch point, wherein j≤2;
S2: the touch point number i relatively obtaining according to described first group of sweep trace scope of blocking and the touch point number j obtaining according to described second group of sweep trace scope of blocking;
If i=1, j=2, touches and have two touch points in surveyed area, and longitudinal initial border of first touch point is M
1a, termination border is M
1a+ U
1; Longitudinal initial border of second touch point is M
1b-U
2, termination border is M
1b;
If i>=j, touches and have i touch point in surveyed area, and longitudinal initial border, each touch point is M
ia, termination border is M
ib;
S3: in the horizontal, repeating step S1 and step S2, obtain touching the number of touch point in surveyed area, and the horizontal initial border of each touch point and stop border;
S4: in conjunction with described step S2 and described step S3, different touch points is distinguished in the initial border according to each touch point on horizontal and vertical and stop border on horizontal and vertical.
2. raising infrared touch panel according to claim 1 touches the method for precision, it is characterized in that:
Described first group of sweep trace is axial principal ray, and described second group of sweep trace is Off-axis-light.
3. raising infrared touch panel according to claim 2 touches the method for precision, it is characterized in that:
Described step S1 is in the following way:
By main shaft scan mode, adopt axial principal ray to scan touching surveyed area; Obtain the longitudinal initial border M in each touch point
ia, stop border M
iband the width W of each touch point
i;
By from axle scan mode, adopt Off-axis-light to scan touching surveyed area; Obtain the longitudinal initial border N in each touch point
ja, stop border N
jband the width U of each touch point
j.
4. raising infrared touch panel according to claim 2 touches the method for precision, it is characterized in that:
Described step S1 is in the following way:
Scan mode by one-to-many scans touching surveyed area, and selection axial principal ray is wherein as described first group of sweep trace, and selection one group of Off-axis-light is wherein as described second group of sweep trace.
5. raising infrared touch panel according to claim 2 touches the method for precision, it is characterized in that:
Described step S1 is in the following way:
By the scan mode of one-to-many, longitudinally scan touching surveyed area;
Take infrared transmitting tube one end as benchmark, the first initial line circle that the Article 1 sweep trace that touched point is blocked is this touch point, the first termination border that the last item sweep trace is this touch point;
Take infrared receiving tube one end as benchmark, the second initial border that the Article 1 sweep trace that touched point is blocked is this touch point, the second termination border that the last item sweep trace is this touch point;
The along slope coordinate of the intersection point on each touch point the first initial line circle and the second initial border is the longitudinal initial border M of this touch point
ia; It is M that each touch point first stops the longitudinal termination border that border and the second along slope coordinate of intersection point that stops border are this touch point
ib.
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| CN201210515195.4A CN103853390B (en) | 2012-12-05 | 2012-12-05 | A kind of method improving infrared touch panel touch precision |
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|---|---|---|---|
| CN201210515195.4A CN103853390B (en) | 2012-12-05 | 2012-12-05 | A kind of method improving infrared touch panel touch precision |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104391612A (en) * | 2014-11-20 | 2015-03-04 | 青岛海信电器股份有限公司 | Method and device for obtaining boundary of touch points |
| CN104866143A (en) * | 2015-05-14 | 2015-08-26 | 青岛海信电器股份有限公司 | Touch point determining method and apparatus, and touch screen device |
| CN105204693A (en) * | 2014-06-19 | 2015-12-30 | 青岛海信电器股份有限公司 | Touch point identification method and device and touch screen equipment |
| CN105242813A (en) * | 2014-06-20 | 2016-01-13 | 鸿合科技有限公司 | Object identification method and device based on infrared screen |
| CN105260064A (en) * | 2015-10-15 | 2016-01-20 | 青岛海信电器股份有限公司 | Touch point identification method and apparatus, and display device |
| CN108008864A (en) * | 2017-11-28 | 2018-05-08 | 暨南大学 | Infrared touch panel touch localization method and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101071356A (en) * | 2007-06-15 | 2007-11-14 | 广东威创日新电子有限公司 | Infrared touch screen and its multi-point touch positioning method |
| CN101387931A (en) * | 2008-10-14 | 2009-03-18 | 贺伟 | Infrared touch screen multi-point recognizing method |
| CN101930322A (en) * | 2010-03-26 | 2010-12-29 | 陈伟山 | Identification method capable of simultaneously identifying a plurality of contacts of touch screen |
| CN102122220A (en) * | 2011-03-01 | 2011-07-13 | 广东威创视讯科技股份有限公司 | Infrared multi-point positioning device and infrared multi-point positioning method |
| KR20110131141A (en) * | 2011-08-22 | 2011-12-06 | 김용철 | Touchscreen device and scan method thereof |
-
2012
- 2012-12-05 CN CN201210515195.4A patent/CN103853390B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101071356A (en) * | 2007-06-15 | 2007-11-14 | 广东威创日新电子有限公司 | Infrared touch screen and its multi-point touch positioning method |
| CN101387931A (en) * | 2008-10-14 | 2009-03-18 | 贺伟 | Infrared touch screen multi-point recognizing method |
| CN101930322A (en) * | 2010-03-26 | 2010-12-29 | 陈伟山 | Identification method capable of simultaneously identifying a plurality of contacts of touch screen |
| CN102122220A (en) * | 2011-03-01 | 2011-07-13 | 广东威创视讯科技股份有限公司 | Infrared multi-point positioning device and infrared multi-point positioning method |
| KR20110131141A (en) * | 2011-08-22 | 2011-12-06 | 김용철 | Touchscreen device and scan method thereof |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105204693A (en) * | 2014-06-19 | 2015-12-30 | 青岛海信电器股份有限公司 | Touch point identification method and device and touch screen equipment |
| CN105204693B (en) * | 2014-06-19 | 2019-12-10 | 青岛海信电器股份有限公司 | Touch point identification method and device and touch screen equipment |
| CN105242813A (en) * | 2014-06-20 | 2016-01-13 | 鸿合科技有限公司 | Object identification method and device based on infrared screen |
| CN104391612A (en) * | 2014-11-20 | 2015-03-04 | 青岛海信电器股份有限公司 | Method and device for obtaining boundary of touch points |
| CN104391612B (en) * | 2014-11-20 | 2020-10-30 | 海信视像科技股份有限公司 | Method and device for acquiring touch point boundary |
| CN104866143A (en) * | 2015-05-14 | 2015-08-26 | 青岛海信电器股份有限公司 | Touch point determining method and apparatus, and touch screen device |
| CN104866143B (en) * | 2015-05-14 | 2017-12-08 | 青岛海信电器股份有限公司 | The determination method, apparatus and touch-screen equipment of a kind of touch point |
| CN105260064A (en) * | 2015-10-15 | 2016-01-20 | 青岛海信电器股份有限公司 | Touch point identification method and apparatus, and display device |
| CN108008864A (en) * | 2017-11-28 | 2018-05-08 | 暨南大学 | Infrared touch panel touch localization method and device |
| CN108008864B (en) * | 2017-11-28 | 2020-11-10 | 暨南大学 | Touch positioning method and device for infrared touch screen |
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