CN101593058B - Method for detecting touch point coordinates - Google Patents
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- CN101593058B CN101593058B CN2009101468889A CN200910146888A CN101593058B CN 101593058 B CN101593058 B CN 101593058B CN 2009101468889 A CN2009101468889 A CN 2009101468889A CN 200910146888 A CN200910146888 A CN 200910146888A CN 101593058 B CN101593058 B CN 101593058B
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Abstract
A method for detecting touch point coordinates comprises the following steps: scanning a plurality of original touch data points; carrying out grouping arithmetic on the original touch data points to classify the original touch data points into a plurality of grouping sets; and calculating barycentric coordinates of each grouping set and outputting the barycentric coordinates as the touch point coordinates.
Description
Technical field
The invention relates to the touch control detection technical field, and particularly relevant for a kind of method for detecting touch point coordinates of supporting that multi-point touch detects.
Background technology
Press; Contact panel is integrated on each electronic product as input media widely; The user only needs on panel, to slide or contact with touching object (the for example object of finger or pointer and so on); Vernier is produced relatively move or absolute coordinates moves, can accomplish various inputs such as comprising character calligraph, scrolling window and virtual key.
At present, the contact panel that is integrated in electronic product comprises two big types of external labeling type contact panel (Surface MountTouch Panel) and embedded touch panels (In-Cell Touch Panel).Wherein, The embedded touch panel technology can realize in existing Thin Film Transistor-LCD (TFT-LCD) processing procedure; Possess the outer also advantage of highly integrated touch controllable function of original display good light electrical characteristics; Can significantly reduce cost compared to traditional external labeling type contact panel, thereby receive much concern.And the various method for detecting touch point coordinates that are applicable to embedded touch panel and the detection of support multi-point touch are also by numerous and confused proposition; The detection performance that right these method for detecting touch point coordinates are reached is different, therefore is necessary method for detecting touch point coordinates is improved constantly.
Summary of the invention
One of the object of the invention is exactly the method for detecting touch point coordinates that is to provide a kind of novelty, supports multi-point touch to detect.
A kind of method for detecting touch point coordinates that one embodiment of the invention proposes comprises step: scan a plurality of original touch-control data points in regular turn; These original touch-control data points execution are hived off algorithm so that these original touch-control data points are classified as a plurality of set of hiving off; And calculate each barycentric coordinates of set of hiving off, and export these barycentric coordinates as touch point coordinate.
In one embodiment of this invention, aforesaidly these original touch-control data points are carried out the algorithm that hives off comprise: give an identification code each original touch-control data point these original touch-control data points are classified as a plurality of steps of hiving off set; Be classified as the same set of hiving off with having same identification sign indicating number person in these original touch-control data points; And be classified as the different set of hiving off with having different identification code persons in these original touch-control data points.
In one embodiment of this invention, the aforesaid step that gives identification code to each original touch-control data point comprises: judge whether the adjacent and adjacent original touch-control data point that scanned early than this original touch-control data point of original therewith touch-control data point exists; And, then give this original touch-control data point one and the identical identification code of adjacent original touch-control data point, otherwise give this original touch-control data point new identification code when adjacent original touch-control data point existence.
In one embodiment of this invention, the step that gives identification code to each original touch-control data point also comprises: the number that detects the adjacent original touch-control data point of this original touch-control data point; And when the number of adjacent original touch-control data point be identification codes a plurality of and these adjacent original touch-control data points when inequality, these adjacent original touch-control data points are carried out identification code merge.
In one embodiment of this invention, aforesaid method for detecting touch point coordinates is suitable for being executed in the LCD of tool embedded touch panel.At this, the sequencing that each original touch-control data point is given identification code is relevant to the scan mode of these original touch-control data points with LCD.
In one embodiment of this invention, the step of the barycentric coordinates of each set of hiving off of aforesaid calculating comprises: the first dimension coordinate of the original touch-control data point in the set that this is hived off and the second dimension coordinate add overall average respectively and get barycentric coordinates.
A kind of method for detecting touch point coordinates that yet another embodiment of the invention proposes comprises step: receive a raw data, this raw data comprises a plurality of original touch-control data points; Give an identification code to discern a plurality of contact areas at these original touch-control data point places to each original touch-control data point; Calculate the barycentric coordinates of the original touch-control data point of each contact area; And export these barycentric coordinates as a plurality of touch point coordinates.Whether the step that wherein, gives the contact area of identification code to discern these original touch-control data points places to each original touch-control data point can comprise: judge that original therewith touch-control data point is adjacent and exist early than the adjacent original touch-control data point that this original touch-control data point is given identification code; And, then give this original touch-control data point one and the identical identification code of adjacent original touch-control data point, otherwise give this original touch-control data point new identification code when adjacent original touch-control data point existence.Further, the step that gives the contact area of identification code to discern these original touch-control data points places to each original touch-control data point more can comprise: the number that detects the adjacent original touch-control data point of this original touch-control data point; And when the number of adjacent original touch-control data point be identification codes a plurality of and these adjacent original touch-control data points when inequality, these adjacent original touch-control data points are carried out identification code merge.
In one embodiment of this invention, aforesaid raw data also comprises a plurality of original non-touch-control data points, and method for detecting touch point coordinates then can also comprise step: do not give identification code to those original non-touch-control data points.
A kind of method for detecting touch point coordinates that further embodiment of this invention proposes comprises step: scan a plurality of original touch-control data point that forms because of the single touch control operation in regular turn; Be dependent on that position in the two-dimensional space does not continue that the person gives same identification code mutually and the rule of mutually continue in the position person gives different identification codes gives an identification code to each original touch-control data point; Through calculating at least one barycentric coordinates that the barycentric coordinates that have same identification sign indicating number person in these original touch-control data points get corresponding these original touch-control data points; And export the result of these at least one barycentric coordinates as this single touch control operation.
The embodiment of the invention mainly is to utilize the notion of the set of hiving off; Give identification code discerning the barycentric coordinates of hiving off set under it and calculating each set of hiving off producing corresponding multiple spot coordinate figure to the original touch-control data point of receiving, thereby can provide true multi-point touch coordinate output to detect to support multi-point touch.
For let above and other objects of the present invention, feature and advantage can be more obviously understandable, hereinafter is special lifts preferred embodiment, and cooperates appended graphicly, elaborates as follows.
Description of drawings
Fig. 1 illustrates a consecutive point method of discrimination that is relevant to the embodiment of the invention.
Fig. 2 illustrates an identification code coding rule that is relevant to the embodiment of the invention.
Fig. 3 illustrates a process flow diagram of a kind of method for detecting touch point coordinates that is relevant to the embodiment of the invention.
Fig. 4 illustrates the raw data carrying out the single touch control operation and get.
Fig. 5 illustrates the state of raw data shown in Figure 4 after each original touch-control data point is given identification code.
Fig. 6 illustrates the state of raw data shown in Figure 5 after the identification code combining step is carried out in the set of respectively hiving off.
Fig. 7 illustrates the computing method of the barycentric coordinates of the set of hiving off shown in Figure 6.
[main element label declaration]
100: raw data
101: original touch-control data point
103: original non-touch-control data point
1011～1019: the set of hiving off
S100, S200, S210, S230, S300: step
Embodiment
About aforementioned and other technology contents, characteristics and effect of the present invention, in the following detailed description that cooperates with reference to a graphic preferred embodiment, can clearly appear.The direction term of being mentioned in following examples, for example: upper and lower a, left side or right side etc. only are the directions with reference to annexed drawings.Therefore, the direction term of use is to be used for explaining not to be to be used for limiting the present invention.
To combine Fig. 1 to Fig. 7 to specifically describe a kind of method for detecting touch point coordinates that one embodiment of the invention proposes below, it is suitable for being executed in the LCD of tool embedded touch panel, but the present invention is not as limit.In the present embodiment, the scan mode that LCD adopted for from left to right, from top to bottom.
At first, with combining Fig. 1 that the consecutive point method of discrimination that present embodiment adopted is described.As shown in Figure 1, it illustrates 9 data points A～I; Wherein, be example with data point E point, it has four consecutive point B, D, F and H (as filling the grid of oblique line among Fig. 1), and data point A, C, G and H will not be judged to be the consecutive point of data point E.
Moreover, with combining Fig. 2 that the coding rule that present embodiment adopted gives identification code to data point is described.As shown in Figure 2, it illustrates three data points U, L and C, and wherein data point U is the consecutive number strong point, top of data point C, and data point L is the left consecutive number strong point of data point C.The identification code of data point U, L and C representes that with ID (U), ID (L) and ID (C) value of data point U, L and C is logical zero or logical one respectively.When C=0, carry out coding rule r0: do not give ID (C) any identification code; When C=1, then the state of the top consecutive number strong point U of judging point C and left consecutive number strong point L will have following five kinds of coding rule r1～r5: (r1) when U=0, L=0; Then give ID (C) new identification code, (r2) when U=1, L=0, ID (C)=ID (U) then; (r3) when U=0, L=1, ID (C)=ID (L) then is (r4) when U=1, L=1; If ID (U)=ID (L), ID (C)=ID (U) or ID (C)=ID (L) then, and (r5) when U=1, L=1; If ID (U) ≠ ID (L), ID (C)=ID (U) then, and ID (U) and ID (L) be made as the same set of hiving off.
Referring to Fig. 3, it illustrates a process flow diagram of the method for detecting touch point coordinates that is relevant to the embodiment of the invention.As shown in Figure 3, the method for detecting touch point coordinates that present embodiment proposes comprises step S100～S300, will combine Fig. 3 to Fig. 7 that step S100～S300 is elaborated below.
Step 100: receive the raw data that comprises a plurality of original touch-control data points.Fig. 4 illustrates the raw data 100 carrying out the single touch control operation and get.As shown in Figure 4; Numeral 1～8 on directions X and the Y direction is the coordinate scale on directions X and the Y direction, and raw data 100 comprises a plurality of original touch-control data points 101 (as filling the grid of oblique line among Fig. 4) and a plurality of original non-touch-control data point 103 (as not filling the grid of oblique line among Fig. 4).At this; The signal that original touch-control data point 101 is produced by the zone of touch object (for example finger) contact in this touching operation corresponding to LCD, and the signal that original non-touch-control data point 103 is not produced by the zone of touch object contact in this touching operation corresponding to LCD; And the value of original touch-control data point 101 is made as logical one in present embodiment, and the value of original non-touch-control data point 103 is made as logical zero.Method for detecting touch point coordinates in the present embodiment adopt LCD from left to right, scan mode from top to bottom reads the data point (comprising original touch-control data point 101 and original non-touch-control data point 103) in the raw data 100.
Step 200: these original touch-control data points execution are hived off algorithm so that these original touch-control data points are classified as a plurality of set of hiving off.The step 200 of present embodiment comprises step 210 and optional step 230, specifies as follows.
Step 210: give identification code respectively so that these original touch-control data points are classified as a plurality of set of hiving off to these original touch-control data points.Fig. 5 illustrates the state of raw data 100 shown in Figure 4 after each original touch-control data point 101 is given identification code, and the sequencing that gives identification code to each original touch-control data point 101 is from left to right, from top to bottom.As shown in Figure 5, on the one hand, according to aforementioned coding rule r0, the original non-touch-control data point 103 in the raw data 100 does not all give any identification code.On the other hand, original touch-control data point 101 is performed hives off algorithm and is classified as a plurality of set 1011～1019 of hiving off, and the respectively corresponding different contact area of set 1011～1019 respectively hives off.At this; The algorithm that hives off is specially: according to aforementioned coding rule r1～r5; Give identification code 1～11 respectively to each original touch-control data point 101 in regular turn; With identification code is that 1～8 original touch-control data point 101 is classified as eight set 1011～1018 of hiving off respectively, and is that 9～11 original touch-control data point 101 is classified as the same set 1019 of hiving off (in other words, hive off a plurality of original touch-control data point 101 of set 1019 have a plurality of identification codes) with identification code.
More specifically; In the present embodiment; The original touch-control data point of gathering in 1011,1012,1014 and 1,015 101 of hiving off is to give identification code according to coding rule r1; The original touch-control data point of gathering in 1013 and 1,016 101 of hiving off is to give identification code according to coding rule r1 and r3; The original touch-control data point of gathering in 1017 and 1,018 101 of hiving off is to give identification code according to coding rule r1 and r2, and the original touch-control data point in the set 1019 of hiving off is to give identification code according to coding rule r1～r3 and r5.
Step 230: identification code is carried out in these set of hiving off respectively merged.Fig. 6 illustrates the state of raw data 100 shown in Figure 5 after the identification code combining step is carried out in the set 1011～1019 of respectively hiving off.Can know from Fig. 5; Only hiving off to gather exists some original touch-control data point 101 to have the identification code situation inequality of a plurality of adjacent original touch-control data points and these adjacent original touch-control data points in 1019; Exist a certain original touch-control data point 101 to have the situation of a plurality of adjacent original touch-control data points and the set of hiving off is neither in 1011～1018, so only need in the present embodiment to the set 1019 execution identification code combining steps that hive off.As shown in Figure 6, after a plurality of adjacent original touch-control data points with different identification codes being carried out the identification code merging, the original touch-control data point 101 of the set 1019 of hiving off only has single identification code 9.And, can learn that from Fig. 6 the original touch-control data point 101 in each set 1011～1019 of hiving off all has identical identification code, and the original touch-control data point 101 in the different set of hiving off has different identification codes.Moreover the original touch-control data point 101 in the same set of hiving off continues the position in the XY two-dimensional space mutually, and four the original touch-control data points 101 of set in 1013 of for example hiving off constitute continuous zones but the person does not continue mutually in the position in the XY two-dimensional space; And do not continue mutually in original touch-control data point 101 positions in the XY two-dimensional space in the different set of hiving off, four original touch-control data points 101 formation one discontinuous zones in original touch-control data point 101 in the set 1012 of for example hiving off and the set 1013 of hiving off but the person mutually continues in the position in the XY two-dimensional space.
Step 300: calculate these barycentric coordinates of set of hiving off respectively, and export these barycentric coordinates as touch point coordinate.Fig. 7 illustrates the computing method of the barycentric coordinates of each set 1011～1019 of hiving off shown in Figure 6.Can learn that from Fig. 7 each set barycentric coordinates of 1011～1019 of hiving off is to add population mean and Y coordinate through the X coordinate that calculates each original touch-control data point in this set of hiving off to add population mean and obtain.Set 1013 is an example to hive off; Set 1013 the identification code of hiving off is 3, original touch-control data point number is 4, the X coordinate adds that total value is 26, to add total value be 4 to the Y coordinate; Can calculate: X coordinate mean value is that 26/4=6.5 and Y coordinate mean value are 4/4=1; So the barycentric coordinates of the set 1013 of hiving off are (6.5,1); Other barycentric coordinates of hiving off set 1011,1012 and 1014～1019 can be with reference to shown in Figure 7, so do not list one by one at this.Extended meeting is exported as a plurality of touch point coordinates and as this and is touched the result of operation after the barycentric coordinates of these set 1011～1019 of hiving off.
Need to prove that the method for detecting touch point coordinates that the present invention proposes is not limited in the described support multi-point touch of previous embodiment and detects, it supports single-point touch to detect equally.In addition; Those skilled in the art also can do suitable change to the method for detecting touch point coordinates that previous embodiment of the present invention proposes; For example change the method for discrimination of consecutive point, please again with reference to figure 2, can with data point A～D and F～I totally eight data points all be judged to be the consecutive point of data point E; Perhaps suitably change the coding rule of identification code, perhaps quantity of data point or the like in the raw data.
In sum; The embodiment of the invention mainly is to utilize the notion of the set of hiving off; Give identification code discerning the barycentric coordinates of hiving off set under it and calculating each set of hiving off producing corresponding multiple spot coordinate figure to the original touch-control data point of receiving, thereby can provide true multi-point touch coordinate output to detect to support multi-point touch.Certainly, the method for detecting touch point coordinates of embodiment of the invention proposition can support single-point touch to detect equally.
Though the present invention discloses as above with preferred embodiment; Right its is not in order to limit the present invention; Any those skilled in the art; Do not breaking away from the spirit and scope of the present invention, when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking appended the claim scope person of defining.
Claims (13)
1. method for detecting touch point coordinates comprises step:
Scan a plurality of original touch-control data points in regular turn;
Through to each these a plurality of original touch-control data points give an identification code, have in will these a plurality of original touch-control data points same identification sign indicating number person be classified as same hive off set and will this a plurality of original touch-control data points in have different identification code persons and be classified as the different set of hiving off, these a plurality of original touch-control data points execution are hived off algorithm so that those original touch-control data points are classified as a plurality of set of hiving off; And
Calculate each those barycentric coordinates of set of hiving off, and export these barycentric coordinates as a touch point coordinate,
The step that wherein these a plurality of original touch-control data points give this identification code to each comprises:
Judge whether and adjacent original touch-control data point that early than this original touch-control data point scanned adjacent with this original touch-control data point exists;
When this adjacent original touch-control data point exists, then give the adjacent original touch-control data point of this original touch-control data point one identical identification code, otherwise give this original touch-control data point one new identification code with this;
Detect the number of this adjacent original touch-control data point of this original touch-control data point; And
When the number of this adjacent original touch-control data point is identification codes a plurality of and those adjacent original touch-control data points when inequality, those adjacent original touch-control data points are carried out identification code merge.
2. method for detecting touch point coordinates according to claim 1, wherein this method for detecting touch point coordinates is suitable for being executed in the LCD of tool embedded touch panel.
3. method for detecting touch point coordinates according to claim 2, the sequencing that wherein these a plurality of original touch-control data points give this identification code to each is relevant to the scan mode of these a plurality of original touch-control data points with this LCD.
4. method for detecting touch point coordinates according to claim 1, the step of wherein calculating these barycentric coordinates of each these a plurality of set of hiving off comprises:
The first dimension coordinate and the second dimension coordinate of these a plurality of original touch-control data points in this set of hiving off added overall average respectively and must these barycentric coordinates.
5. method for detecting touch point coordinates comprises step:
Receive a raw data, this raw data comprises a plurality of original touch-control data points;
Through to each these a plurality of original touch-control data points give an identification code, have in will these a plurality of original touch-control data points same identification code person be identified as in the same contact area original touch-control data point and will these a plurality of original touch-control data points in have different identification code persons and be identified as the original touch-control data point in the different contact zone territory, to discern a plurality of contact areas at this a plurality of original touch-control data points place;
Calculate barycentric coordinates of these a plurality of original touch-control data points of each these a plurality of contact area; And
Export those barycentric coordinates as a plurality of touch point coordinates,
The step that wherein these a plurality of original touch-control data points give this identification code to each comprises:
Judge adjacent and whether exist early than the adjacent original touch-control data point that this original touch-control data point is given this identification code with this original touch-control data point;
When this adjacent original touch-control data point exists, then give the adjacent original touch-control data point of this original touch-control data point one identical identification code, otherwise give this original touch-control data point one new identification code with this;
Detect the number of this adjacent original touch-control data point of this original touch-control data point; And
When the number of this adjacent original touch-control data point is identification codes a plurality of and those adjacent original touch-control data points when inequality, those adjacent original touch-control data points are carried out identification code merge.
6. method for detecting touch point coordinates according to claim 5, the step of these barycentric coordinates of wherein calculating these a plurality of original touch-control data points of each those contact area comprises:
The first dimension coordinate of these a plurality of original touch-control data points in this contact area and the second dimension coordinate added overall average respectively and must these barycentric coordinates.
7. method for detecting touch point coordinates according to claim 5, wherein this method for detecting touch point coordinates is suitable for being executed in the LCD of tool embedded touch panel.
8. method for detecting touch point coordinates according to claim 7, the sequencing that wherein these a plurality of original touch-control data points give this identification code to each is relevant to the scan mode of these a plurality of original touch-control data points with this LCD.
9. method for detecting touch point coordinates according to claim 5, wherein this raw data also comprises a plurality of original non-touch-control data points, this method for detecting touch point coordinates also comprises step: do not give identification code to these a plurality of original non-touch-control data points.
10. method for detecting touch point coordinates comprises step:
Scan a plurality of original touch-control data point that forms because of the single touch control operation in regular turn;
Through these a plurality of original touch-control data points give an identification code, have same identification sign indicating number person in will these a plurality of original touch-control data points and be classified as the same set of hiving off, have different identification code persons in will these a plurality of original touch-control data points and be classified as the different set of hiving off to each, come these a plurality of original touch-control data points are carried out and hive off algorithm so that those original touch-control data points are classified as a plurality of set of hiving off;
Through calculating the barycentric coordinates that have identical this identification code person in these a plurality of original touch-control data points and must be at least one these barycentric coordinates that should a plurality of original touch-control data points; And
Export the result of these at least one barycentric coordinates as this single touch control operation,
The step that wherein these a plurality of original touch-control data points give this identification code to each comprises:
Be dependent on that position in the two-dimensional space does not continue that the person gives same identification code mutually and the rule of mutually continue in the position person gives different identification codes these a plurality of original touch-control data points give this identification code to each;
Detect the number of the consecutive original touch-control data point in position in the two-dimensional space; And
When the number of this consecutive original touch-control data point is identification codes a plurality of and those consecutive original touch-control data points when inequality, those consecutive original touch-control data points are carried out identification code merge.
11. method for detecting touch point coordinates according to claim 10, wherein through calculating these barycentric coordinates of having identical this identification code person in these a plurality of original touch-control data points and must the step of at least one these barycentric coordinates that should a plurality of original touch-control data points be comprised:
The first dimension coordinate that has identical this identification code person in these a plurality of original touch-control data points and the second dimension coordinate added overall average respectively and must these barycentric coordinates.
12. method for detecting touch point coordinates according to claim 10, wherein this method for detecting touch point coordinates is suitable for being executed in the LCD of tool embedded touch panel.
13. method for detecting touch point coordinates according to claim 12, the sequencing that wherein these a plurality of original touch-control data points give this identification code to each is relevant to the scan mode of these a plurality of original touch-control data points with this LCD.
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| CN114253417B (en) * | 2021-12-02 | 2024-02-02 | Tcl华星光电技术有限公司 | Multi-touch point identification method and device, computer readable medium and electronic equipment |
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| CN101369199A (en) * | 2007-08-15 | 2009-02-18 | 国际商业机器公司 | Method for correcting coordinate on contact panel to real display coordinate |
| CN101387927A (en) * | 2008-11-04 | 2009-03-18 | 友达光电股份有限公司 | Touch control detecting method of touch control panel |
| CN101408821A (en) * | 2008-08-19 | 2009-04-15 | 友达光电股份有限公司 | Method anddevice of multi-point tracing |
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| CN101369199A (en) * | 2007-08-15 | 2009-02-18 | 国际商业机器公司 | Method for correcting coordinate on contact panel to real display coordinate |
| CN101408821A (en) * | 2008-08-19 | 2009-04-15 | 友达光电股份有限公司 | Method anddevice of multi-point tracing |
| CN101387927A (en) * | 2008-11-04 | 2009-03-18 | 友达光电股份有限公司 | Touch control detecting method of touch control panel |
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