CN102681738B - Multi-point touch identifying method and touch device for mutual capacitance type touch equipment - Google Patents
Multi-point touch identifying method and touch device for mutual capacitance type touch equipment Download PDFInfo
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Abstract
The invention is applied to the field of electric digital data processing and provides a multi-point touch identifying method for mutual capacitance type touch equipment. The method comprises the following steps of: (A), catching contacts of touch action corresponding positions; (B), respectively analyzing contact combination relations of the touch action corresponding positions according to a plurality of combination rules, comparing with historical information and selecting a contact combination rule of a touch action corresponding position that a contact combination relation of the touch action corresponding position meets the historical information; (C), combining contacts of the touch action corresponding positions by using the contact combination rule of the touch action corresponding position, which meets the historical information; and (D), obtaining new contacts according to the combination and calculating a coordinate position of the touch action corresponding position. By technical characteristics that each contact combination relation is analyzed and compared with the historical information according to a plurality of combination rules so as to select the combination rule meeting the historical information and the contacts are combined, the identifying method has high identification accuracy without error.
Description
Technical field
The invention belongs to electric digital data processing field, particularly relate to a kind of capacitance touch equipment multiple point touching discrimination method and touching device.
Background technology
When generic finger touches capacitance plate, the electric field of surface capacitance changes the corresponding induced signal of triggering, cause the intensity of touch and position can be identified, the change shape (with reference to figure 1) of signal when ground connection is good, namely the peak value exceeding default touch threshold signal is considered to center and the contact of current touch, the coordinate position of touch is calculated, namely popular in current capacitance plate drive software centroid algorithm according to contact.During imperfect earth, touch signal becomes no longer desirable (with reference to figure 2), and the touch (as thumb touches) of larger area easily occurs two or more contacts, then easily draw two or above coordinate position according to classic method.Now need a kind of mechanism, these some contacts occurred can be merged into a stable contact, meanwhile, do not affect two identification when depending near touch.Popular at present (with reference to figure 3), can touch larger area and stablize identification one-tenth a bit, then the probability being mistaken for some during the close touch of multiple spot is high; Multiple spot truly can be recognized as multiple spot near touch, then the touch of larger area is also easily mistaken for multiple spot.Not good defect is experienced when illustrating low, the easy erroneous judgement of touch accurate recognition degree of mutual capacitance touch equipment multiple point touching discrimination method in prior art, continuous touch in sum.
Summary of the invention
The object of the embodiment of the present invention is the multiple point touching discrimination method providing a kind of mutual capacitance type touch apparatus, is intended to solve low, the easy erroneous judgement of accurate recognition degree in prior art, touch the not good technical matters of experience continuously.
The embodiment of the present invention is achieved in that a kind of multiple point touching discrimination method of mutual capacitance type touch apparatus, said method comprising the steps of:
The contact of A, seizure touch action correspondence position;
B, utilize multiple merge rule analyze respectively touch action correspondence position contact merge relation, comparison historical information, choose touch action correspondence position contact merge relation meet the touch action correspondence position of historical information contact merge rule;
The contact meeting the touch action correspondence position of historical information described in C, utilization merges rule and merges the contact of caught touch action correspondence position;
D, obtain new contact according to merging, calculate the coordinate position of touch action correspondence position.
Further technical scheme of the present invention is: comprise the following steps in described step B:
B1, the contact utilizing multiple merging rule to analyze touch action correspondence position respectively merge relation;
B2, by analyze touch action correspondence position contact merge relation sort according to the distance between contact;
B3, comparison historical information, the contact merging relation selecting touch action correspondence position meets the contact merging rule of the touch action correspondence position of historical information;
Described distance is the distance of two touch contacts, in rectangular coordinate system, be expressed as the quadratic sum of the absolute value of the absolute value of the difference of two touch contact horizontal ordinates and the difference of ordinate, or be similar to the absolute value sum being reduced to the absolute value of the difference of two touch contact horizontal ordinates and the difference of ordinate further.
Further technical scheme of the present invention is: further comprising the steps of after described step B, before C:
Judge described touch action correspondence position contact merge relation meet the touch action correspondence position of historical information contact merge rule whether have multiple;
When having multiple, select contact spacing in all merging relations regular from the contact merging of the touch action correspondence position corresponding to nearest merging relation.
Further technical scheme of the present invention is: in described step B, multiple contact merges rule and comprises strong rule set and general rule collection;
Described strong rule set is the functional operation value of first vegetarian refreshments in centre position, two contacts, is greater than the preset ratio of the functional operation value of described two contacts, should merge this two contacts;
Described general rule collection is that two contact enclosing region all elements values meet specific feature, should merge this two contacts;
Described specific feature is in two contact enclosing region, and the functional operation value of corresponding element vegetarian refreshments exceedes the preset ratio of the functional operation value of described two contacts.
Further technical scheme of the present invention is: described strong rule set contains the mathematical feature of multiple touch.Described general rule collection contains the mathematical feature of multiple touch.
Described data characteristics, when touching generation, reacts the signal intensity on capacitance plate.
Another object of the embodiment of the present invention is to provide a kind of capacitance touch equipment multiple point touching device for identifying, and this device comprises:
Search module, for catching the contact of touch action correspondence position;
Analyze contrast module, contact for utilizing multiple merging rule to analyze touch action correspondence position respectively merges relation, comparison historical information, the contact merging relation choosing touch action correspondence position meets the contact merging rule of the touch action correspondence position of historical information;
Merge module, the contact for meeting the touch action correspondence position of historical information described in utilizing merges rule and merges the contact of caught touch action correspondence position;
Computing module, for obtaining new contact according to merging, calculates the coordinate position of touch action correspondence position.
Further technical scheme of the present invention is: described analysis contrast module comprises with lower module:
Analysis module, merges relation for the contact utilizing multiple merging rule to analyze touch action correspondence position respectively;
Merging relation order module, sorts according to the distance between contact for the contact analyzing touch action correspondence position is merged relation;
Information contrast module, the contact for selecting touch action correspondence position merges the contact merging rule that relation meets the touch action correspondence position of historical information.
Further technical scheme of the present invention is: merge between module and also comprise in described analyses and comparison module, contact with lower module:
Merging relation statistical module, for judge described touch action correspondence position contact merge relation meet the touch action correspondence position of historical information contact merge rule whether have multiple;
Merging rules selection module, for when having multiple, selecting contact spacing in all merging relations regular from the contact merging of the touch action correspondence position corresponding to nearest merging relation.
Utilize multiple merging rule, analyze touch action correspondence position contact merge relation and with historical information comparison, select the merging rule meeting historical information, contact is merged to the technical characteristic obtaining new contact, thus make the accurate recognition degree of this discrimination method high, not easily judge by accident, experience when touching continuously good.Existing other technologies and scheme, under identical mutual capacitance type touch screen structure, be difficult to reach the touch identification level identical with the present invention.
Accompanying drawing explanation
Fig. 1 be prior art mutual capacitance type touch apparatus ground signalling good time touch signal variation diagram;
Fig. 2 be prior art mutual capacitance type touch apparatus ground signalling bad time touch signal variation diagram;
Fig. 3 is the schematic diagram of prior art mutual capacitance type touch apparatus contact discrimination classic method;
Fig. 4 is that mutual capacitance type touch apparatus of the present invention touches discrimination method process flow diagram;
Fig. 5 is the structure principle chart that mutual capacitance type touch apparatus of the present invention touches discrimination method;
Fig. 6 is strong rule set schematic diagram in the multiple point touching discrimination method of mutual capacitance type touch apparatus of the present invention;
Fig. 7 is general rule collection schematic diagram and special characteristic schematic diagram in the multiple point touching discrimination method of mutual capacitance type touch apparatus of the present invention;
Fig. 8 is data characteristics transverse direction/longitudinal schematic diagram in the multiple point touching discrimination method of mutual capacitance type touch apparatus of the present invention;
Fig. 9 is the oblique schematic diagram of data characteristics in the multiple point touching discrimination method of mutual capacitance type touch apparatus of the present invention;
Figure 10 is data characteristics square schematic diagram in the multiple point touching discrimination method of mutual capacitance type touch apparatus of the present invention;
Figure 11 is three touch Unite principle figure in the multiple point touching discrimination method of mutual capacitance type touch apparatus of the present invention;
Figure 12 is four touch Unite principle figure in the multiple point touching discrimination method of mutual capacitance type touch apparatus of the present invention;
Figure 13 is that the continuous touch of the multiple point touching discrimination method of mutual capacitance type touch apparatus of the present invention and classic method touch comparison diagram continuously.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Fig. 4 shows the flow process of the multiple point touching discrimination method of the capacitance touch equipment that the embodiment of the present invention provides, and details are as follows:
In step S101, according to the change of the induced signal of touch action correspondence position, catch all contacts exceeding default touch threshold.
In step s 102, utilize the multiple merging rules preset during design, the contact capturing touch action corresponding is analyzed respectively, obtain the merging relation between each contact, these merging relations are put in order according to the distance between contact, and compare with historical information, select the merging rule contact that each contact merging relation meets historical information, the merging rule of other merging relation neglects, when the merging rule that the contact selected merges relation has multiple, select contact spacing from the merging rule of nearest merging relation.Multiple contacts of presetting merge rule and comprise strong rule set and general rule collection, contain multiple different data characteristics in each rule set.
Described strong rule set is the functional operation value of first vegetarian refreshments in centre position, two contacts, is greater than the preset ratio of the functional operation value of described two contacts, should merge this two contacts.If two contacts are contact A (2,2), contact B(4 respectively, 5), Pa(3 is considered, 3) and Pb(3,4) element value of position, if these two element values are all more than the preset ratio of the functional operation value of two contacts, contact A and contact B should be merged.Can be expressed as with general mathematical linguistics: if f [Pa (3,3) and Pb (3,4)]
>f ' (contact A, contact B), then think and should carry out merging (with reference to figure 6).Function f and f ' can be linear functions, as summation/weighted sum, can be nonlinear functions, as maximizing, can be also nonlinear functions, as product etc.
General rule collection is that two contact enclosing region all elements values meet specific feature, should merge this two contacts.Place value element value sums as all in enclosing region, more than two contact position element value sums, consider Pa (2,3), Pb(2,4), Pee(2,5), Pd(3,2), Pc(3,3), Pcc(3,4), Pdd(3,5), Pe(4,2) Paa(4,3), Pbb(4,4) position element value, if these element value sums exceed the functional operation value of contact A, contact B, then thinks and should carry out merging (with reference to figure 7).
Specific feature is in two contact enclosing region, and the functional operation value of corresponding element vegetarian refreshments exceedes the preset ratio of the functional operation value of described two contacts.As 50%, two contacts refer to contact A, contact B, and correspondence position refers to Pa-Paa, Pb-Pbb, Pc-Pcc, Pd-Pdd, Pe-Pee, occurs in pairs each other in rectangular area, are produced respectively by two contacts.If f [(Pa+Paa), (Pb+Pbb), (Pc+Pcc), (Pd+Pdd), (Pe+Pee)] > f ' (contact A, contact B), then think that the numerical value in this region meets specific feature, contact A and contact B should be merged.Function f and f ' can be linear functions, and as summation, can be nonlinear function, as maximizing, also can be nonlinear function, as product etc. (with reference to figure 7).
Data characteristics, when touching generation, reacts the signal intensity on capacitance plate.Data characteristics comprises laterally/longitudinally touch, oblique touch, square touch etc.
Laterally/longitudinally touch: it is considered that the numerical value of contact A and middle six points of B, middle six some Pa, Pb, Pc, Paa, the element value that the correspondence position element value sum of Pbb, Pcc is greater than contact A correspondence position adds the element value sum of upper contact B correspondence position, thinks that contact A and contact B can merge (with reference to figure 8).
Oblique touch: it is considered that contact A and middle two the some Pc of B, Pcc numerical value will be greater than the preset ratio as contact A and contact B functional operation value respectively, and surrounding six some Pa, Pb, Pd, Paa, Pbb, the element value that the correspondence position element value sum of Pdd is greater than contact A correspondence position adds the element value sum of upper contact B correspondence position, thinks that contact A and contact B can merge (with reference to figure 9).
Square touch: it is considered that the numerical value of contact A and the middle Pc of B is greater than predetermined threshold value, Pa simultaneously, Pb, Paa, the correspondence position element value sum of Pbb is greater than contact A correspondence position element value and adds upper contact B correspondence position element value sum, thinks that contact A and contact B can merge (with reference to Figure 10).
Although it should be noted that the data characteristics of touch all meets above-mentioned three shapes generally, not only terminate in this, such as scope may be larger, comprise more element, Fig. 8, Fig. 9, Figure 10 just illustrate, do not represent the present invention and only process for these three data characteristicses.
Described distance is the distance of two touch contacts, in rectangular coordinate system, be expressed as the quadratic sum of the absolute value of the absolute value of the difference of two touch contact horizontal ordinates and the difference of ordinate, or be similar to the absolute value sum being reduced to the absolute value of the difference of two touch contact horizontal ordinates and the difference of ordinate further.
In step s 103, utilizing the merging rule of the merging relation of historical information that meets most selected, merging capturing all contacts exceeding default touch threshold.
The information that historical information prestores when comprising touch information record once and design.Mainly refer to touch information record once herein, the information that the touch in past brings, there is a two finger touch and never interrupted, although current existence two touch contacts that can merge, but algorithm still tends to the independence keeping these two contacts, instead of the two is merged.During design stored in information be the reference of empirical parameter to touch-screen research, during design stored in information upgraded along with the increase of once touch information record.
In step S104, the multiple element values obtained will be merged in S103, and calculate according to these element values and touch corresponding coordinate position.
With reference to accompanying drawing 4, the multiple point touching device for identifying of this capacitance touch equipment provided by the invention, this device comprises: search module, analysis contrast module, merging module, computing module.
Search module 10 catches the contact of touch action correspondence position; Analyzing contrast module 20 utilizes multiple merging rule to analyze the contact merging relation of touch action correspondence position respectively, comparison historical information, the contact merging relation choosing touch action correspondence position meets the contact merging rule of the touch action correspondence position of historical information; Merge module 40, the contact meeting the touch action correspondence position of historical information described in utilization merges rule and merges the contact of caught touch action correspondence position; Computing module 50, obtains new contact according to merging, calculates the coordinate position of touch action correspondence position.
The process that analysis contrast module 20 does contact analysis and the comparison of the relation of merging is specific as follows: analysis module 201, utilizes the regular contact analyzing touch action correspondence position respectively of multiple merging to merge relation; Merging relation order module 202, merges relation by the contact analyzing touch action correspondence position and sorts according to the distance between contact; Information contrast module 203, the contact merging relation selecting touch action correspondence position meets the contact merging rule of the touch action correspondence position of historical information.
Also comprise between analyses and comparison module, merging module: merge relation statistical module, merge rules selection module.Merging relation statistical module 61, judge described touch action correspondence position contact merge relation meet the touch action correspondence position of historical information contact merge rule whether have multiple; Merging rules selection module 62, when having multiple, selecting contact spacing in all merging relations regular from the contact merging of the touch action correspondence position corresponding to nearest merging relation.
Problem for convenience of explanation, illustrates as follows:
During without any historical touch, use and all merge rule, analyze the current some touch contacts searched out, the amalgamation result obtained is final amalgamation result.Because without any historical information, have no way of with reference to judging.
When having historical touch, as there are three touch in the past, current discovery four touch, supposes to have two combinations and rule, and rule 1 is for the contact of close together, and rule 2 is for distant contact.Rule 1 finds that A and B can merge, and C and D can merge, and always has two independent touches, rule 2 finds that B and D can merge, and A, C are independent touch respectively, now contrast historical information (three touch), rule 1 provides 2 results touched, rule 2 provides 3 results touched, and therefore accepts and believe the result of rule 2, and B and D merges, A and C is independent, the result (with reference to Figure 12) of ignore rule 1
There are two contacts touching correspondence position in past, do not merge, be judged as independently two touches, occurred now that three touch the contacts of correspondence positions, suppose currently have two combinations and rule, according to rule 1, B and C can merge into a touch, and A is independent touch, according to rule 2, A and B can merge into a touch, and C is independent touch.Two groups of rules all give the amalgamation result consistent with account of the history.But because the contact distance each other that can merge in rule 1 is nearer, so take the merging method in rule 1, B and C merges, and A keeps independent (with reference to Figure 11).In like manner, if there are three touches in the past, there is the rule that can merge although so current, but still tend to believe historical information, keep three contact independence separately.
The electronic equipment having mutual capacitance type touch screen that a few money is different is tested, and result is as follows: effect when thumb stablizes setting-out after the representative of black continuous line segment uses the present invention, is recognized as single-point and touches and steady and continuous.When the representative of black discrete point uses classic method identification same setting-out data, two that often quote even three touch, result is chaotic and unstable (reference Figure 13).
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a multiple point touching discrimination method for mutual capacitance type touch apparatus, is characterized in that, said method comprising the steps of:
The contact of A, seizure touch action correspondence position;
B, utilize multiple merge rule analyze respectively touch action correspondence position contact merge relation, comparison historical information, choose touch action correspondence position contact merge relation meet the touch action correspondence position of historical information contact merge rule;
The contact meeting the touch action correspondence position of historical information described in C, utilization merges rule and merges the contact of caught touch action correspondence position;
D, obtain new contact according to merging, calculate the coordinate position of touch action correspondence position;
Comprise the following steps in described step B:
B
1.the contact utilizing multiple merging rule to analyze touch action correspondence position respectively merges relation;
B
2.the contact analyzing touch action correspondence position is merged relation sort according to the distance between contact;
B
3.comparison historical information, the contact merging relation selecting touch action correspondence position meets the contact merging rule of the touch action correspondence position of historical information;
Described distance is the distance of two touch contacts, in rectangular coordinate system, be expressed as the quadratic sum of the absolute value of the absolute value of the difference of two touch contact horizontal ordinates and the difference of ordinate, or be similar to the absolute value sum being reduced to the absolute value of the difference of two touch contact horizontal ordinates and the difference of ordinate further.
2. according to claim
1the multiple point touching discrimination method of described mutual capacitance type touch apparatus, is characterized in that, further comprising the steps of after described step B, before C:
Judge described touch action correspondence position contact merge relation meet the touch action correspondence position of historical information contact merge rule whether have multiple;
When having multiple, select contact spacing in all merging relations regular from the contact merging of the touch action correspondence position corresponding to nearest merging relation.
3. according to claim
1the multiple point touching discrimination method of described mutual capacitance type touch apparatus, is characterized in that, in described step B, multiple contact merges rule and comprises strong rule set and general rule collection;
Described strong rule set is the functional operation value of first vegetarian refreshments in centre position, two contacts, is greater than the preset ratio of the functional operation value of described two contacts, should merge this two contacts;
Described general rule collection is that two contact enclosing region all elements values meet specific feature, should merge this two contacts;
Described specific feature is in two contact enclosing region, and the functional operation value of corresponding element vegetarian refreshments exceedes the preset ratio of the functional operation value of described two contacts.
4. according to claim
3the multiple point touching discrimination method of described mutual capacitance type touch apparatus, is characterized in that, described strong rule set contains the data characteristics of multiple touch;
Described data characteristics, when touching generation, reacts the signal intensity on capacitance plate.
5. according to claim
3the multiple point touching discrimination method of described mutual capacitance type touch apparatus, is characterized in that, described general rule collection contains the data characteristics of multiple touch;
Described data characteristics, when touching generation, reacts the signal intensity on capacitance plate.
6. a mutual capacitance type touch apparatus multiple point touching device for identifying, is characterized in that, comprising:
Search module, for catching the contact of touch action correspondence position;
Analyze contrast module, contact for utilizing multiple merging rule to analyze touch action correspondence position respectively merges relation, comparison historical information, the contact merging relation choosing touch action correspondence position meets the contact merging rule of the touch action correspondence position of historical information;
Merge module, the contact for meeting the touch action correspondence position of historical information described in utilizing merges rule and merges the contact of caught touch action correspondence position;
Computing module, for obtaining new contact according to merging, calculates the coordinate position of touch action correspondence position;
Described analysis contrast module comprises with lower module:
Analysis module, merges relation for the contact utilizing multiple merging rule to analyze touch action correspondence position respectively;
Merging relation order module, sorts according to the distance between contact for the contact analyzing touch action correspondence position is merged relation;
Information contrast module, the contact for selecting touch action correspondence position merges the contact merging rule that relation meets the touch action correspondence position of historical information.
7. according to claim
6described mutual capacitance type touch apparatus multiple point touching device for identifying, is characterized in that, also comprises with lower module between described analyses and comparison module, merging module:
Merging relation statistical module, for judge described touch action correspondence position contact merge relation meet the touch action correspondence position of historical information contact merge rule whether have multiple;
Merging rules selection module, for when having multiple, selecting contact spacing in all merging relations regular from the contact merging of the touch action correspondence position corresponding to nearest merging relation.
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| TWI497401B (en) * | 2012-12-14 | 2015-08-21 | Focaltech Systems Ltd | Multipoint locating method and device on a touch screen |
| CN103699259B (en) * | 2013-12-09 | 2016-12-07 | 宇龙计算机通信科技(深圳)有限公司 | A kind of method of cursor positioning, system and touch apparatus |
| CN109753180B (en) * | 2018-12-25 | 2020-12-15 | 深圳市德明利技术股份有限公司 | Judging method of three-finger coaxial splitting point in touch identification, touch screen and electronic equipment |
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