CN103941929A - Position detecting method and device of touch screen - Google Patents
Position detecting method and device of touch screen Download PDFInfo
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- CN103941929A CN103941929A CN201310025291.5A CN201310025291A CN103941929A CN 103941929 A CN103941929 A CN 103941929A CN 201310025291 A CN201310025291 A CN 201310025291A CN 103941929 A CN103941929 A CN 103941929A
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Abstract
The invention relates to a position detecting method and device of a touch screen. The capacitive coupling variation of a plurality of detecting positions of the touch screen is detected, the outlines corresponding to all outside objects are judged according to the capacitive coupling variation of the detecting positions of the touch screen, and therefore coordinate data are generated according to two values or four values in the outline corresponding to each outside object.
Description
Technical field
The invention relates to a kind of method and apparatus of position detecting of touch-screen, particularly a kind of method and apparatus of the position detecting that improves linear touch-screen.
Background technology
Existing known capacitive touch screen (capacitive touch screen), comprise that insulation top layer, the first conductive layer, dielectric layer, the second conductive layer, wherein the first conductive layer and the second conductive layer have respectively many first buss and the second bus, these buss can be to be made up of with the connecting line of the conducting strip of connecting multiple conducting strips.
The corresponding capacitively coupled variable quantity that can be obtained the detecting position of multiple touch-screens in touch-screen by aforesaid the first bus or the second bus.In the time that external conductive object approaches or touches touch-screen, in described capacitively coupled variable quantity, can present the profile of corresponding each external object, as shown in Figure 1A.Can calculate a coordinate data (position) of corresponding external object according to the part or all of value of the profile corresponding to single external object.For example, calculate centroid position (centroid) with three values or whole values of maximum.
In a profile, maximal value has the greatest impact to coordinate position.For example, in Figure 1A, be value with maximal value and both sides (previous value with in a rear value) calculate coordinate data, because the peak in profile (can be called relatively high point) is positioned at the 3rd value, coordinate data will be positioned near the coordinate of the 3rd value.
But in the moving process of external object, summit is shifted to another adjacent value by a value, as shown in Figure 1B and Fig. 1 C.Due to maximal value, to affect coordinate data larger, causes the shift position with respect to external object most, and coordinate data is from fast to slow by accelerating slowly again, therefore can cause the not good situation of linearity as shown in Fig. 1 D.
As can be seen here, above-mentioned prior art obviously has inconvenience and defect, and the utmost point is waited to be further improved.In order to solve the problem of above-mentioned existence, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but have no for a long time applicable design is completed by development always, and common product and method do not have appropriate structure and method to address the above problem, this is obviously the problem that the anxious wish of relevant dealer solves.Therefore how to found a kind of new technology, real one of the current important research and development problem that belongs to, also becoming the current industry utmost point needs improved target.
Summary of the invention
The object of the invention is to, the method and apparatus of detecting position is provided, can in the time producing coordinate data, reduce peaked impact, to reduce linear not good problem.
The object of the invention to solve the technical problems realizes by the following technical solutions.The method of the position detecting of the touch-screen proposing according to the present invention, it comprises: the capacitive couplings variable quantity of multiple detectings position of detecting touch-screen, the wherein corresponding coordinate of each capacitive couplings variable quantity; And judge respectively the profile corresponding to each external object according to the capacitive couplings variable quantity of the detecting position of described touch-screen, and produce coordinate datas according to four values in the profile of corresponding each external object respectively.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The method of the position detecting of aforesaid touch-screen, wherein coordinate data is
The method of the position detecting of aforesaid touch-screen, wherein C1 and C3 be respectively peaked previous value with in a rear value, and C2 and C4 be respectively Second Largest Value in previous value and in a rear value.
The method of the position detecting of aforesaid touch-screen, wherein C2 and C4 be respectively peaked previous value with in a rear value, and C1 and C3 be respectively Second Largest Value in previous value and in a rear value.
The method of the position detecting of aforesaid touch-screen, wherein the generation of coordinate data comprises: in the profile corresponding to each external object according to peaked in previous value and peakedly calculate the first center-of-mass coordinate in a rear value, be reset to coordinate corresponding to maximal value; In the profile corresponding to each external object according to Second Largest Value previous value and Second Largest Value calculate the second center-of-mass coordinate in a rear value, be reset to the coordinate that Second Largest Value is corresponding; And in the profile corresponding to each external object, calculate coordinate data according to maximal value and Second Largest Value, wherein coordinate data is to calculate according to the first center-of-mass coordinate and the second center-of-mass coordinate.
The method of the position detecting of aforesaid touch-screen, wherein the first center-of-mass coordinate is (C1 × X1+C3 × X3)/(C1+C3), and the second center-of-mass coordinate is (C2 × X2+C4 × X4)/(C2+C4), wherein X1, X2, X3 and X4 are respectively C1, C2, the coordinate of C3 and C4, wherein C1, peaked previous value in the profile that C2 is corresponding each external object with C3, maximal value, a peaked rear value, and C2, the previous value of the Second Largest Value in the profile that C3 is corresponding each external object with C4, Second Largest Value, a rear value of Second Largest Value.
The method of the position detecting of aforesaid touch-screen, wherein coordinate data is (((C1 × X1+C3 × X3)/(C1+C3)) × C2+ ((C2 × X2+C4 × X4)/(C2+C4)) × C3)/(C2+C3).
The method of the position detecting of aforesaid touch-screen, wherein the first center-of-mass coordinate is (C2 × X2+C4 × X4)/(C2+C4), and the second center-of-mass coordinate is (C1 × X1+C3 × X3)/(C1+C3), wherein X1, X2, X3 and X4 are respectively C1, C2, the coordinate of C3 and C4, wherein C2, peaked previous value in the profile that C3 is corresponding each external object with C4, maximal value, a peaked rear value, and C1, the previous value of the Second Largest Value in the profile that C2 is corresponding each external object with C3, Second Largest Value, a rear value of Second Largest Value.
The object of the invention to solve the technical problems also realizes by the following technical solutions.The method of the position detecting of the touch-screen proposing according to the present invention, it comprises: detect the capacitive couplings variable quantity of the detecting position of multiple touch-screens, wherein the corresponding coordinate of each capacitive couplings variable quantity; And judge respectively the profile corresponding to each external object according to the capacitive couplings variable quantity of the detecting position of described touch-screen, and produce coordinate datas according to two values in the profile of corresponding each external object respectively.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The method of the position detecting of aforesaid touch-screen, wherein coordinate data is (C1 × X1+C3 × X3)/(C1+C3), wherein X1 and X3 are respectively the coordinate of C1 and the coordinate of C3, and C1 and C3 are respectively two values in the profile of corresponding each external object.
The method of the position detecting of aforesaid touch-screen, two wherein said values are respectively peaked in previous value and peaked in a rear value in the profile of corresponding each external object.
The method of the position detecting of aforesaid touch-screen, two wherein said values do not comprise corresponding to the maximal value in the profile of each external object.
The object of the invention to solve the technical problems realizes in addition more by the following technical solutions.The device of the position detecting of the touch-screen proposing according to the present invention, it comprises: detecting unit, the capacitive couplings variable quantity of multiple detectings position of detecting touch-screen, the wherein corresponding coordinate of each capacitive couplings variable quantity; And control module, the capacitive couplings variable quantity of the detecting position of the described touch-screen of foundation is judged respectively the profile corresponding to each external object, and produces coordinate datas according to four values in the profile of corresponding each external object respectively.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The device of the position detecting of aforesaid touch-screen, wherein coordinate data is
The device of the position detecting of aforesaid touch-screen, wherein C1 and C3 be respectively peaked previous value with in a rear value, and C2 and C4 be respectively Second Largest Value in previous value and in a rear value.
The device of the position detecting of aforesaid touch-screen, wherein C2 and C4 be respectively peaked previous value with in a rear value, and C1 and C3 be respectively Second Largest Value in previous value and in a rear value.
The object of the invention to solve the technical problems also realizes in addition by the following technical solutions.The device of position detecting of the touch-screen proposing according to the present invention, it comprises: detecting unit, detect the capacitive couplings variable quantity of the detecting position of multiple touch-screens, wherein corresponding coordinate of each capacitive couplings variable quantity; And control module, the capacitive couplings variable quantity of the detecting position of the described touch-screen of foundation is judged respectively the profile corresponding to each external object, and produces coordinate datas according to two values in the profile of corresponding each external object respectively.
The device of the position detecting of aforesaid touch-screen, wherein coordinate data is (C1 × X1+C3 × X3)/(C1+C3), wherein X1 and X3 are respectively the coordinate of C1 and the coordinate of C 3, and C1 and C3 are respectively two values in the profile of corresponding each external object.
The device of the position detecting of aforesaid touch-screen, two wherein said values are respectively peaked in previous value and peaked in a rear value in the profile of corresponding each external object.
The device of aforesaid position detecting, two wherein said values do not comprise corresponding to the maximal value in the profile of each external object.
By technique scheme, the method and apparatus of the detecting position of touch-screen of the present invention at least has following advantages and beneficial effect: in the time producing coordinate data, reduce peaked impact, can reduce linear not good problem.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of instructions, and for above and other object of the present invention, feature and advantage can be become apparent, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, be described in detail as follows.
Brief description of the drawings
Figure 1A to Fig. 1 D is the schematic diagram of prior art coordinates computed data.
Fig. 2 A and 2B are the schematic diagram of capacitance type sensor.
Fig. 3 is the schematic flow sheet according to the first embodiment of the present invention.
Fig. 4 is the example according to the first embodiment of the present invention.
Fig. 5 is the schematic flow sheet according to the second embodiment of the present invention.
Fig. 6 is the example according to the second embodiment of the present invention.
Fig. 7 is according to a kind of schematic flow sheet that produces coordinate data of the present invention.
[main element symbol description]
100: position detecting apparatus 110: display
120: touch-screen 120A: the first sensed layer
120B: the second sensed layer 130: driving/detecting unit
140: bus 140A: the first bus
140B: the second bus 160: controller
161: processor 162: internal memory
170: main frame 171: CPU (central processing unit)
173: storage element
Embodiment
It is as follows that the present invention will describe some embodiment in detail.But except disclosed embodiment, the embodiment that the present invention can also be used in other widely implements.Scope of the present invention is not subject to the restriction of those embodiment, is be as the criterion with the scope of claims.And can understand summary of the invention of the present invention for clearer description being provided and making to be familiar with this skill person, in diagram, each several part is not drawn according to its relative size, some size is highlighted and the exaggeration that seems with the ratio regular meeting of other scale dependent, and incoherent detail section is not also drawn completely, in the hope of illustrated succinct.
Refer to Fig. 2 A, the present invention proposes a kind of position detecting apparatus 100, comprises touch-screen 120, with driving/detecting unit 130.Touch-screen 120 has sensed layer.In one example of the present invention, this sensed layer can comprise the first sensed layer 120A and the second sensed layer 120B, the first sensed layer 120A and the second sensed layer 120B have respectively multiple buss 140, and wherein multiple the first bus 140A of the first sensed layer 120A and multiple the second bus 140B of the second sensed layer 120B are overlapping.In another example of the present invention, multiple the first bus 140A and the second bus 140B can be configured in coplanar sensed layer.Driving/detecting unit 130 produces sensitive information according to the signal of multiple buss 140.For example, in the time that self-capacitance formula is detected, be the driven bus 140 of detecting, and in the time that mutual capacitance type detect, detecting be the directly partially conductive bar 140 of drivings of do not driven/detecting unit 130.In addition, touch-screen 120 can be to be configured on display 110, can be have configuration screen layer (shielding layer) (not showing in icon) or do not configure screen layer between touch-screen 120 and display 110.In a preferable example of the present invention, in order to make the thickness of touch-screen 120 thinner, between touch-screen 120 and display 110, do not configure screen layer.
Aforementioned the first bus and the second bus can be many row buss and the row buss of arranging with row or column, can also be many first dimension buss and the second dimension bus of arranging with the first dimension and the second dimension, or along many first axle buss and the second axle bus of the first axle and the arrangement of the second axle.In addition, aforementioned the first bus and the second bus can be with orthogonal overlapping to each other, can also be with nonopiate overlapping.For example, in a polar coordinate system, one of described the first bus or second bus can be radial arrangement, and another of described the first bus or the second bus can be annular arrangement.Moreover, one of described the first bus or second bus can for drive bus, and described the first bus or the second bus another can for detecting bus.Described " the first dimension " all can be used to represent aforesaid " first " and " second " bus with " detecting ", " by driving " with " by detecting " bus with " the second axle ", " driving " with " the second dimension ", " the first axle ", include but not limited to form orthogonal grid (orthogonal grids), can also be form other have the first dimension and the second dimension overlapping (intersecting) bus geometry frameworks (geometric configurations).
Position detecting apparatus 100 of the present invention can be to be applied in calculator system, and an example as shown in Figure 2 B comprises controller 160 and main frame 170.Controller comprises driving/detecting unit 130, with the touch-screen 120 that is operatively coupled (not showing in diagram).In addition, controller 160 can comprise processor 161, controls driving/detecting unit 130 and produces sensitive information, and sensitive information can be to be stored in internal memory 162, for processor 161 accesses.In addition, main frame 170 forms the main body of computing system, mainly comprises CPU (central processing unit) 171, and supplies the storage element 173 of CPU (central processing unit) 171 accesses, and shows the display 110 of operation result.
In another example of the present invention, between controller 160 and main frame 170, comprise transport interface, control module transmits data to main frame by transport interface, and those skilled in the art can know transport interface by inference and include but not limited to the various wired or wireless transport interface such as UART, USB, I2C, Bluetooth, WiFi, IR.In one example of the present invention, the data of transmission can be position (as coordinate), identification result (as gesture code), order, sensitive information or the available information of other controller 160.
In one example of the present invention, sensitive information can be to control produced initial sensitive information (initial sensing information) by processor 161, transfer to main frame 170 to carry out position analysis, for example position analysis, gesture judgement, order identification etc.In another example of the present invention, sensitive information can be first to be analyzed by processor 161, then the position judging, gesture, order etc. are submitted to main frame 170.The present invention includes but be not limited to aforesaid example, those skilled in the art can know the interaction between other controller 160 and main frame 170 by inference.
In the crossover region of each bus, upper with under bus form the two poles of the earth.Each crossover region can be considered the pixel (pixel) in an image (image), in the time having one or more external conductive objects to approach or touch, described image can be considered the image (if finger touches is in the aspect (pattern) of sensing apparatus) that photographs touching.
In the time that one is driven bus to be provided a driving signal, driven bus itself to form a self-capacitance (self capacitance), and driven the each crossover region on bus to form a mutual capacitance (mutual capacitance).The detecting of aforesaid self-capacitance formula is the self-capacitance of all buss of detecting, be specially adapted to judge single external conductive object near to or in contact with.
Aforesaid mutual capacitance type detecting, in the time that one is driven bus to be provided a driving signal, by being detected with driving all sensed bus that bus different dimensions is arranged the electric capacity or the capacitance change that drive all crossover regions on bus, to be considered as the row pixel in image.Accordingly, the pixel of collecting all row forms described image.When there being one or more external conductive objects to approach or when touching, described image can be considered the image that photographs touching, be specially adapted to judge multiple external conductive objects near to or in contact with.
These buss (the first bus and the second bus) can be to be made up of transparent or opaque material, for example, can be to be made up of transparent tin indium oxide (ITO).Structurally can be divided into single layer structure (SITO; Single ITO) and double-decker (DITO; Double ITO).The ordinary person of the art can know the material of other bus by inference, is repeating no more.For example, CNT.
In example of the present invention, be using laterally as first direction, and using longitudinally as second direction, therefore horizontal bus is the first bus, and longitudinal bus is the second bus.Those skilled in the art can know one of above-mentioned example that is illustrated as invention by inference, are not used for limiting the present invention.For example, can be using longitudinally as first direction, and using laterally as second direction.In addition, the first bus can be identical with the number of the second bus, can be also different, and for example, the first bus has N bar, and the second bus has M bar.
In the time carrying out the detecting of two-dimensions mutual capacitance type, the driving signal exchanging is sequentially provided for each first bus, and obtaining a dimension sensitive information that is provided the bus that drives signal corresponding to each via the signal of the second described bus, set forms two-dimensions sensitive information corresponding to the sensitive information of all the first buss.A described dimension sensitive information can be to produce according to the signal of the second described bus, can be also to produce according to the described signal of the second bus and the measures of dispersion of benchmark.In addition, sensitive information can be that electric current, voltage, capacitive couplings amount, the quantity of electric charge or other characteristic electron of basis signal produces, and can be to exist with the form of analog or digital.
When not having actually external conductive object to approach or covering touch-screen, or system is not judged external conductive object and is approached or cover when touch-screen, position detecting apparatus can produce a benchmark by the signal of the second described bus, and what benchmark presented is the stray capacitance on touch-screen.Sensitive information can be to produce according to the signal of the second bus, or deducting benchmark according to the signal of the second bus produces.
Referring to Fig. 3, is the method for position detecting of a kind of touch-screen of proposing according to the first embodiment of the present invention.As shown in step 310, detect the capacitive couplings variable quantity of multiple detectings position of multiple touch-screens, wherein the corresponding coordinate of each capacitive couplings variable quantity.Next, as shown in step 320, the capacitive couplings variable quantity of the detecting position of the described touch-screen of foundation is judged respectively the profile corresponding to each external object, and produces coordinate datas according to two values in the profile of corresponding each external object respectively.
Two values in the profile of each described external object can be two values including maximal value, or two values not including maximal value.In addition, two values in the profile of each described external object can be adjacent, or non-conterminous.
In one example of the present invention, coordinate data is that (C1 × X1+C3 × X3)/(C1+C3), wherein X1 and X3 are respectively the coordinate of C1 and the coordinate of C3, and C1 and C3 are respectively two values in the profile of corresponding each external object.
Referring to Fig. 4, is the example schematic proposing according to the first embodiment of the present invention.In this example, to produce coordinate data according to two non-conterminous values including maximal value not, as according to maximal value (the 3rd value) previous value (the 2nd value) with maximal value (the 3rd value) in a rear value (the 4th is worth).
Accordingly, the present invention proposes a kind of device of position detecting of touch-screen, comprises detecting unit and control module.Detecting unit can be as shown in driving/detecting unit of Fig. 2 A, detects the capacitive couplings variable quantity of the detecting position of multiple touch-screens, wherein the corresponding coordinate of each capacitive couplings variable quantity.Control module can be as shown in the controller 160 of Fig. 2 B, the capacitive couplings variable quantity of the detecting position of the described touch-screen of foundation is judged respectively the profile corresponding to each external object, and produces coordinate datas according to two values in the profile of corresponding each external object respectively.Please refer to Fig. 5, is the method for position detecting of a kind of touch-screen of proposing according to the second embodiment of the present invention.As shown in step 510, the capacitive couplings variable quantity of multiple detectings position of detecting touch-screen, the wherein corresponding coordinate of each capacitive couplings variable quantity.Next, as shown in step 520, the capacitive couplings variable quantity of the detecting position of the described touch-screen of foundation is judged respectively the profile corresponding to each external object, and produces coordinate datas according to four values in the profile of corresponding each external object respectively.
In one example of the present invention, coordinate data is
Please refer to Fig. 6, is the example schematic of the second embodiment of the present invention proposition according to optimal mode.In this example, be according to maximal value (the 3rd value) previous value (the 2nd value) with a rear value (the 4th value), a value (4th value) adjacent with maximal value (the 3rd value) in previous value (the 3rd value) and produce coordinate data in a rear value (the 4th value).
In one example of the present invention, maximal value and second largest value are adjacent, coordinate data be according to maximal value (the 3rd value) previous value (the 2nd value) with a rear value (the 4th value), and Second Largest Value (the 3rd value) in previous value (the 3rd value) and producing in a rear value (the 4th value).For example, aforesaid C1 and C3 be respectively peaked previous value with in a rear value, and aforesaid C2 and C4 be respectively Second Largest Value in previous value and in a rear value.Again for example, aforesaid C2 and C4 be respectively peaked previous value with in a rear value, and aforesaid C1 and C3 be respectively Second Largest Value in previous value and in a rear value.
Accordingly, the present invention proposes a kind of device of position detecting of touch-screen, comprises detecting unit and control module.Detecting unit can be as shown in driving/detecting unit of Fig. 2 A, detects the capacitive couplings variable quantity of the detecting position of multiple touch-screens, wherein the corresponding coordinate of each capacitive couplings variable quantity.Control module can be as shown in the controller 160 of Fig. 2 B, the capacitive couplings variable quantity of the detecting position of the described touch-screen of foundation is judged respectively the profile corresponding to each external object, and produces coordinate datas according to four values in the profile of corresponding each external object respectively.
In one example of the present invention, be according to peaked previous value with calculate a center-of-mass coordinate in a rear value, be reset to coordinate corresponding to maximal value.In addition, be according to Second Largest Value previous value with calculate a center-of-mass coordinate in a rear value, be reset to the coordinate that Second Largest Value is corresponding.Calculate a centroid position accordingly, then according to maximal value and Second Largest Value.
Please refer to shown in Fig. 7, is foundation a kind of schematic flow sheet that produces coordinate data of the present invention.First, as shown in step 710, in the profile corresponding to each external object according to peaked in previous value and peakedly calculate the first center-of-mass coordinate in a rear value, be reset to coordinate corresponding to maximal value.And, as shown in step 720, in the profile corresponding to each external object according to Second Largest Value previous value and Second Largest Value calculate the second center-of-mass coordinate in a rear value, be reset to the coordinate that Second Largest Value is corresponding.Next, as shown in step 730, in the profile corresponding to each external object, calculate coordinate data according to maximal value and Second Largest Value, wherein coordinate data is to calculate according to the first center-of-mass coordinate and the second center-of-mass coordinate.
For example, when before maximal value is positioned at Second Largest Value, the first center-of-mass coordinate is (C1 × X1+C3 × X3)/(C1+C3), and the second center-of-mass coordinate is (C2 × X2+C4 × X4)/(C2+C4), wherein X1, X2, X3 and X4 are respectively C1, C2, the coordinate of C3 and C4, wherein C1, peaked previous value in the profile that C2 is corresponding each external object with C3, maximal value, a peaked rear value, and C2, the previous value of the Second Largest Value in the profile that C3 is corresponding each external object with C4, Second Largest Value, a rear value of Second Largest Value.
Again for example, when after maximal value is positioned at Second Largest Value, the first center-of-mass coordinate is (C2 × X2+C4 × X4)/(C2+C4), and the second center-of-mass coordinate is (C1 × X1+C3 × X3)/(C1+C3), wherein X1, X2, X3 and X4 are respectively C1, C2, the coordinate of C3 and C4, wherein C1, peaked previous value in the profile that C2 is corresponding each external object with C3, maximal value, a peaked rear value, and C2, the previous value of the Second Largest Value in the profile that C3 is corresponding each external object with C4, Second Largest Value, a rear value of Second Largest Value.
Accordingly, coordinate data is (((C1 × X1+C3 × X3)/(C1+C3)) × C2+ ((C2 × X2+C4 × X4)/(C2+C4)) × C3)/(C2+C3).
In above stated specification, coordinate X1, X2, X3 and X4 can be the coordinate of a dimension or the coordinate of two-dimensions.Be for example the lateral coordinates y of along slope coordinate x, a dimension of a dimension or two-dimensions longitudinally to lateral coordinates (x, y).Therefore, while producing aforesaid coordinate data, can be to produce respectively longitudinal coordinate and horizontal coordinate, form aforesaid coordinate data.
The above, it is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, although the present invention discloses as above with preferred embodiment, but not in order to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, when can utilizing the method for above-mentioned announcement and technology contents to make a little change or being modified to the equivalent embodiment of equivalent variations, in every case be the content that does not depart from technical solution of the present invention, any simple modification of above embodiment being done according to technical spirit of the present invention, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (20)
1. a method for the position detecting of touch-screen, is characterized in that it comprises:
The capacitive couplings variable quantity of multiple detectings position of detecting touch-screen, the wherein corresponding coordinate of each capacitive couplings variable quantity; And
The capacitive couplings variable quantity of the detecting position of the described touch-screen of foundation is judged respectively the profile corresponding to each external object, and produces coordinate datas according to four values in the profile of corresponding each external object respectively.
2. the method for the position detecting of touch-screen according to claim 1, is characterized in that coordinate data is
3. the method for the position detecting of touch-screen according to claim 2, it is characterized in that C1 and C3 be respectively peaked previous value with in a rear value, and C2 and C4 be respectively Second Largest Value in previous value and in a rear value.
4. the method for the position detecting of touch-screen according to claim 2, it is characterized in that C2 and C4 be respectively peaked previous value with in a rear value, and C1 and C3 be respectively Second Largest Value in previous value and in a rear value.
5. the method for the position detecting of touch-screen according to claim 1, is characterized in that the generation of coordinate data comprises:
In the profile corresponding to each external object according to peaked in previous value and peakedly calculate the first center-of-mass coordinate in a rear value, be reset to coordinate corresponding to maximal value;
In the profile corresponding to each external object according to Second Largest Value previous value and Second Largest Value calculate the second center-of-mass coordinate in a rear value, be reset to the coordinate that Second Largest Value is corresponding; And
In the profile corresponding to each external object, calculate coordinate data according to maximal value and Second Largest Value, wherein coordinate data is to calculate according to the first center-of-mass coordinate and the second center-of-mass coordinate.
6. the method for the position detecting of touch-screen according to claim 5, it is characterized in that the first center-of-mass coordinate is for (C1 × X1+C3 × X3)/(C1+C3), and the second center-of-mass coordinate is (C2 × X2+C4 × X4)/(C2+C4), wherein X1, X2, X3 and X4 are respectively C1, C2, the coordinate of C3 and C4, wherein C1, peaked previous value in the profile that C2 is corresponding each external object with C3, maximal value, a peaked rear value, and C2, the previous value of the Second Largest Value in the profile that C3 is corresponding each external object with C4, Second Largest Value, a rear value of Second Largest Value.
7. the method for the position detecting of touch-screen according to claim 6, is characterized in that coordinate data is (((C1 × X1+C3 × X3)/(C1+C3)) × C2+ ((C2 × X2+C4 × X4)/(C2+C4)) × C3)/(C2+C3).
8. the method for the position detecting of touch-screen according to claim 5, it is characterized in that the first center-of-mass coordinate is for (C2 × X2+C4 × X4)/(C2+C4), and the second center-of-mass coordinate is (C1 × X1+C3 × X3)/(C1+C3), wherein X1, X2, X3 and X4 are respectively C1, C2, the coordinate of C3 and C4, wherein C2, peaked previous value in the profile that C3 is corresponding each external object with C4, maximal value, a peaked rear value, and C1, the previous value of the Second Largest Value in the profile that C2 is corresponding each external object with C3, Second Largest Value, a rear value of Second Largest Value.
9. a method for the position detecting of touch-screen, is characterized in that it comprises:
Detect the capacitive couplings variable quantity of the detecting position of multiple touch-screens, wherein the corresponding coordinate of each capacitive couplings variable quantity; And
The capacitive couplings variable quantity of the detecting position of the described touch-screen of foundation is judged respectively the profile corresponding to each external object, and produces coordinate datas according to two values in the profile of corresponding each external object respectively.
10. the method for the position detecting of touch-screen according to claim 9, it is characterized in that coordinate data is (C1 × X1+C3 × X3)/(C1+C3), wherein X1 and X3 are respectively the coordinate of C1 and the coordinate of C3, and C1 and C3 are respectively two values in the profile of corresponding each external object.
The method of the position detecting of 11. touch-screens according to claim 10, is characterized in that two described values are respectively peaked in previous value and peaked in a rear value in the profile of corresponding each external object.
The method of the position detecting of 12. touch-screens according to claim 10, is characterized in that two described values do not comprise corresponding to the maximal value in the profile of each external object.
The device of the position detecting of 13. 1 kinds of touch-screens, is characterized in that it comprises:
Detecting unit, the capacitive couplings variable quantity of multiple detectings position of detecting touch-screen, the wherein corresponding coordinate of each capacitive couplings variable quantity; And
Control module, the capacitive couplings variable quantity of the detecting position of the described touch-screen of foundation is judged respectively the profile corresponding to each external object, and produces coordinate datas according to four values in the profile of corresponding each external object respectively.
The device of the position detecting of 14. touch-screens according to claim 13, is characterized in that coordinate data is
The device of the position detecting of 15. touch-screens according to claim 14, it is characterized in that C1 and C3 be respectively peaked previous value with in a rear value, and C2 and C4 be respectively Second Largest Value in previous value and in a rear value.
The device of the position detecting of 16. touch-screens according to claim 14, it is characterized in that C2 and C4 be respectively peaked previous value with in a rear value, and C1 and C3 be respectively Second Largest Value in previous value and in a rear value.
The device of the position detecting of 17. 1 kinds of touch-screens, is characterized in that it comprises:
Detecting unit, detects the capacitive couplings variable quantity of the detecting position of multiple touch-screens, wherein the corresponding coordinate of each capacitive couplings variable quantity; And
Control module, the capacitive couplings variable quantity of the detecting position of the described touch-screen of foundation is judged respectively the profile corresponding to each external object, and produces coordinate datas according to two values in the profile of corresponding each external object respectively.
The device of the position detecting of 18. touch-screens according to claim 17, it is characterized in that coordinate data is (C1 × X1+C3 × X3)/(C1+C3), wherein X1 and X3 are respectively the coordinate of C1 and the coordinate of C3, and C1 and C3 are respectively two values in the profile of corresponding each external object.
The device of the position detecting of 19. touch-screens according to claim 18, is characterized in that two described values are respectively peaked in previous value and peaked in a rear value in the profile of corresponding each external object.
The device of the position detecting of 20. touch-screens according to claim 18, is characterized in that two described values do not comprise corresponding to the maximal value in the profile of each external object.
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| CN101971125A (en) * | 2008-01-09 | 2011-02-09 | 辛纳普蒂克斯公司 | Locating multiple objects on a capacitive touch pad |
| US20110037727A1 (en) * | 2008-03-12 | 2011-02-17 | Atlab Inc. | Touch sensor device and pointing coordinate determination method thereof |
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| TW201250565A (en) * | 2010-12-30 | 2012-12-16 | Egalax Empia Technology Inc | Capacitive touch screen |
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