CN103677353A - Touch sensor and touch point positioning method thereof - Google Patents
Touch sensor and touch point positioning method thereof Download PDFInfo
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- CN103677353A CN103677353A CN201210322463.0A CN201210322463A CN103677353A CN 103677353 A CN103677353 A CN 103677353A CN 201210322463 A CN201210322463 A CN 201210322463A CN 103677353 A CN103677353 A CN 103677353A
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Abstract
The invention discloses a touch sensor. The touch sensor comprises a plurality of first-dimension transparent conducting electrodes, a plurality of second-dimension transparent conducting electrodes, one or more signal generators, one or more analog-digital converters, and one or more arithmetic units. The first-dimension transparent conducting electrodes and the second-dimension transparent conducting electrodes are used for forming a plurality of touch sensing points. The signal generators are used for generating at least two orthogonal signals and enabling the orthogonal singles to be simultaneously coupled with at least two of the first-dimension transparent conducting electrodes respectively. The analog-digital converters are used for receiving a plurality of sensing signals of the second-dimension transparent conducting electrodes. The arithmetic units are used for converting the sensing signals so as to judge the composition of the orthogonal signals in the sensing signals and to position at least one touch point on the touch sensing points.
Description
Technical field
The present invention relates to a kind of touch-control sensor and touch point localization method thereof, relating in particular to a kind of can simultaneously sending a plurality ofly can distinguishing signal respond to, and in induced signal, judge the plurality of can distinguishing signal composition out of the ordinary, to locate fast touch-control sensor and the touch point localization method thereof of touch point.
Background technology
In general, the touch point localization method of known touch control induction device, all coordinates scanning sequence intercepting panel induced signal with time domain sweep signal, and usings the order of scanning and arrange location as correspondence position.
For instance, please refer to Fig. 1 and Fig. 2, Fig. 1 is the schematic diagram of a known touch control induction device 10, and Fig. 2 is the schematic diagram of sweep frequency signal w (the 1)～w (k) shown in Fig. 1 and a sequential synchronizing signal Syn.As shown in Figure 1, touch control induction device 10 includes a touch-control sensing panel 100, a pulse wave signal generator 102, an analog-digital converter (analog to digital converter, ADC) 104 and one microprocessor 106.In simple terms, touch-control sensing panel 100 includes vertical transparent conductive electrode Tc (1)～Tc (k) and horizontal transparent conductive electrode Tr (1)～Tr (j), it can form touch-control sensing point T (1,1)～T (j, k), wherein, known transparent conductive electrode mostly is tin indium oxide (Indium Tin Oxide, ITO) structure, the In that composition is 90%
2o
3with 10% SnO
2potpourri, but plain conductor that also can fine (naked eyes are not visible) is realized.
Then, as shown in Figures 1 and 2, when known touch control induction device 10 carries out time domain Scan orientation, pulse wave signal generator 102 can be according to a frequency signal clk, sequentially producing sweep frequency signal w (1)～w (k) gives vertical transparent conductive electrode Tc (1)～Tc (k) and produces timing synchronization signal Syn and give analog-digital converter 104, make analog-digital converter 104 and to carry out analog digital conversion according to induced signal s (1)～s (j) of the timing synchronization signal Syn horizontal transparent conductive electrode Tr of reception (1)～Tr (j), then microprocessor 106 determines touch-control sensing point T (1, 1)～T (j, k) corresponding touch-control sensing point signal P (1, 1)～P (j, k).For example, when learning that according to timing synchronization signal Syn current output scanning frequency signal w (m) gives vertical transparent conductive electrode Tc (m), now induced signal s (the 1)～s (j) of gained represents touch-control sensing point T (1, m)～T (j, m) the corresponding touch-control sensing point signal P (1 of (being the touch-control sensing point on vertical transparent conductive electrode Tc (m)), m)～P (j, m).Finally, at pulse wave signal generator 102, sequentially producing sweep frequency signal w (1)～w (k) completes after scanning vertical transparent conductive electrode Tc (1)～Tc (k), microprocessor 106 can be put signal P (1 according to touch-control sensing, 1)～P (j, k) signal intensity, determine that touch point occurs in the position of touch-control sensing point T (1,1)～T (j, k).
Yet, when known touch control induction device 10 carries out time domain Scan orientation, owing to scanning one by one vertical transparent conductive electrode Tc (1)～Tc (k) with sweep frequency signal w (1)～w (k), and need the data of matching timing synchronizing signal Syn intercepting induced signal s (1)～s (j), so speed is disturbed slowly and easily.In view of this, known technology has improved necessity in fact.
Summary of the invention
Therefore, fundamental purpose of the present invention is to provide a kind of can simultaneously sending a plurality ofly can distinguishing signal to respond to, and in induced signal, judge the plurality of can distinguishing signal composition out of the ordinary, to locate fast touch-control sensor and the touch point localization method thereof of touch point.
The present invention discloses a kind of touch-control sensor, includes a touch-control sensing panel, includes a plurality of the first dimension transparent conductive electrodes and a plurality of the second dimension transparent conductive electrode, is used for forming a plurality of touch-control sensing points; One or more signal generator, is used for producing at least two orthogonal signal and is coupled respectively in the plurality of the first dimension transparent conductive electrode at least the two simultaneously; One or more analog-digital converter, is coupled to the plurality of the second dimension transparent conductive electrode, is used for receiving a plurality of induced signals of the plurality of the second dimension transparent conductive electrode; And one or more arithmetic element, be used for changing the plurality of induced signal, to judge that the composition of these at least two orthogonal signal in the plurality of induced signal forms and locates at least one touch point on the plurality of touch-control sensing point.
The present invention also discloses a kind of touch-control sensor, includes a touch-control sensing panel, includes a plurality of the first dimension transparent conductive electrodes and a plurality of the second dimension transparent conductive electrode, is used for forming a plurality of touch-control sensing points; One or more signal generator, is used for producing at least two cycle signals and is coupled respectively in the plurality of the first dimension transparent conductive electrode at least the two simultaneously; One or more analog-digital converter, is coupled to the plurality of the second dimension transparent conductive electrode, is used for receiving a plurality of induced signals of the plurality of the second dimension transparent conductive electrode; And one or more arithmetic element, be used for changing the plurality of induced signal, to judge that the composition of these at least two cycle signals in the plurality of induced signal forms and locates at least one touch point on the plurality of touch-control sensing point.
The present invention also discloses a kind of touch point localization method, for a touch-control sensor, includes at least two of generations and can distinguishing signal be coupled respectively in a plurality of the first dimension transparent conductive electrodes at least the two simultaneously; Receive a plurality of induced signals of a plurality of the second dimension transparent conductive electrodes; Change the plurality of induced signal, with judge in the plurality of induced signal these at least two can distinguishing signal composition form; And locate at least one touch point on the plurality of the first dimension transparent conductive electrode and the formed the plurality of touch-control sensing point of the plurality of the second dimension transparent conductive electrode.
At this, coordinate detailed description and claims of following diagram, embodiment, by address other object of the present invention and advantage and be specified in after.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a known touch control induction device.
Fig. 2 is the schematic diagram of the sweep frequency signal shown in Fig. 1 and a sequential synchronizing signal.
Fig. 3 is the schematic diagram of the embodiment of the present invention one touch control induction device.
Fig. 4 be shown in Fig. 3 can distinguishing signal the schematic diagram of the cycle signal that is different frequency.
Fig. 5 be shown in Fig. 3 can distinguishing signal during the cycle signal that is different frequency, the schematic diagram of induced signal.
Fig. 6 is the schematic diagram that the arithmetic element shown in Fig. 3 is changed an induced signal.
Fig. 7 is the schematic diagram of the embodiment of the present invention one touch point positioning flow.
Wherein, description of reference numerals is as follows:
10,30 touch control induction devices
100,300 touch-control sensing panels
102 pulse wave signal generators
104,304 analog-digital converters
106 microprocessors
302 signal generators
306 arithmetic elements
70 flow processs
702～708 steps
The vertical transparent conductive electrode of Tc (1)～Tc (k)
The horizontal transparent conductive electrode of Tr (1)～Tr (j)
T (1,1)～T (j, k) touch-control sensing point
Clk, clk ＇ frequency signal
W (1)～w (k) sweep frequency signal
Syn timing synchronization signal
S (1)～s (j), s (1) ＇～s (j) ＇ induced signal
P (1,1)～P (j, k), P (1,1) ＇～P (j, k) ＇ touch-control sensing point signal
F (1)～f (k) can distinguishing signal
Embodiment
Please refer to Fig. 3, Fig. 3 is the schematic diagram of the embodiment of the present invention one touch control induction device 30.As shown in Figure 3, touch control induction device 30 includes a touch-control sensing panel 300, a signal generator 302, an analog-digital converter (analog to digital converter, ADC) 304 and one arithmetic element 306.In simple terms, touch-control sensing panel 300 is similar to touch-control sensing panel 100 parts so indicate with same-sign, include vertical transparent conductive electrode Tc (1)～Tc (k) and horizontal transparent conductive electrode Tr (1)～Tr (j), it can form touch-control sensing point T (1,1)～T (j, k).Signal generator 302 can produce and can be coupled respectively to vertical transparent conductive electrode Tc (1)～Tc (k) by distinguishing signal f (1)～f (k) simultaneously according to frequency signal clk ＇, analog-digital converter 304 can be coupled to horizontal transparent conductive electrode Tr (1)～Tr (j), be used for the horizontal transparent conductive electrode Tr of reception (1)～Tr (j) induced signal s (1) ＇～s (j) ＇ and carry out analog digital conversion, the convertible induced signal s of arithmetic element 306 (1) ＇～s (j) ＇, with composition that can distinguishing signal f (1)～f (k) in judgement induced signal s (1) ＇～s (j) ＇, form and determine touch-control sensing point T (1, 1)～T (j, k) corresponding touch-control sensing point signal P (1, 1) ＇～P (j, k) ＇, relocate at least one touch point and put T (1 at touch-control sensing, 1)～T (j, k) on.
In this case, due to arithmetic element 306 can judge in induced signal s (1) ＇～s (j) ＇ can distinguishing signal f (1)～f (k) composition form, therefore can distinguishing signal f (1)～f (k) can be coupled respectively to vertical transparent conductive electrode Tc (1)～Tc (k) simultaneously and by arithmetic element 306, be judged again, and not need as known technology, vertical transparent conductive electrode Tc (1)～Tc (k) sequentially to be scanned.Thus, the present invention can be coupled simultaneously can not needed sequentially to scan to vertical transparent conductive electrode Tc (1)～Tc (k) by distinguishing signal f (1)～f (k), then receive at any time and transformation induction signal s (1) ＇～s (j) ＇, according to composition that wherein can distinguishing signal f (1)～f (k), form judgement touch point position again and do not need to coordinate synchronous, therefore can accelerate touch-control system detecting speed.
Specifically, can distinguishing signal f (1)～f (k) can be orthogonal orthogonal signal or there is the signal of other characteristic that can distinguish, then formed according to composition that can distinguishing signal f (1)～f (k) in orthogonality or other characteristic judgement induced signal s (1) ＇～s (j) ＇ by arithmetic element 306.For instance, can can be orthogonal cycle signal by distinguishing signal f (1)～f (k), as there is the cycle signal of different frequency, or there is same frequency but the cycle signal of phase differential 90 degree, by frequency spectrum and the phase place of 306 couples of induced signal s of arithmetic element (1) ＇～s (j) ＇, analyzed again, with determine can distinguishing signal f (1)～f (k) composition form.
For instance, please refer to Fig. 4 and Fig. 5, Fig. 4 is shown in Fig. 3 can distinguishing signal f (1)～f (k) to be the schematic diagram of the cycle signal of different frequency, Fig. 5 be shown in Fig. 3 can distinguishing signal f (1)～f (k) during for the cycle signal of different frequency (this example is string ripple), the schematic diagram of induced signal s (1) ＇～s (j) ＇.As shown in Figures 4 and 5, due to vertical transparent conductive electrode Tc (1)～Tc (k), coupling can distinguishing signal f (1)～f (k) respectively simultaneously, therefore induced signal s (1) ＇～s (j) ＇ that horizontal transparent conductive electrode Tr (1)～Tr (j) can distinguishing signal f (1)～f (k) produces because of touch point superposition part, can because touch point position and difference (as touch point and touch point horizontal transparent conductive electrode Tr (j) on the corresponding vertical transparent conductive electrode difference of position on horizontal transparent conductive electrode Tr (1), so induced signal s (1) ＇ of institute's superposition, the waveform of s (j) ＇ is also different).
In this case, please refer to Fig. 6, Fig. 6 is the schematic diagram that 306 couples of induced signal s of the arithmetic element shown in Fig. 3 (1) ＇ changes.As shown in Figure 6, if what signal generator 302 produced can be respectively 10Hz by distinguishing signal f (1)～f (k), 20Hz, 30Hz ... (100*k) the cycle signal of Hz, when two touch points drop on horizontal transparent conductive electrode Tr (1) and vertical transparent conductive electrode Tc (5), the touch-control sensing point T (1 that Tc (7) is crossing, 5), T (1, 7) time, arithmetic element 306 is converted to by time domain induced signal s (1) ＇ being intercepted by horizontal transparent conductive electrode Tr (1) after frequency domain, can obtain spectrum signal as shown in Figure 6, in frequency, be that 50Hz and 70Hz place have signal (right-side signal is the symmetric signal producing while changing), therefore arithmetic element 306 can correspondence be learnt at horizontal transparent conductive electrode Tr (1) and vertical transparent conductive electrode Tc (5), the touch-control sensing point T (1 that Tc (7) is crossing, 5), T (1, 7) there is touch-control to occur.
The computing that above-mentioned arithmetic element 306 is converted to frequency domain by induced signal s (1) ＇ by time domain can be changed for discrete Fourier (Discrete Fourier Transform, DFT) or fast fourier conversion (Fast Fourier Transform, FFT), but because the reacting dose of characteristic frequency is only meaningful (as 10Hz, 20Hz, the 30Hz to can distinguishing signal f (1)～f (k) relevant ... (100*k) frequency of Hz), therefore can make calculation process for characteristic frequency, with the complexity of simplified operation.Fast fourier is converted to the operational method of high efficiency discrete Fourier conversion, and discrete Fourier conversion and fast fourier are converted to well known to those of ordinary skill in the art, do not repeat them here.
It should be noted that, main spirits of the present invention is to be coupled simultaneously can distinguishing signal not needed sequentially to scan to vertical transparent conductive electrode, then receive at any time and transformation induction signal, according to composition that can distinguishing signal in induced signal, form judgement touch point position again and do not need to coordinate synchronous, therefore can accelerate touch-control system detecting speed.Those of ordinary skills work as and can modify according to this or change, and are not limited to this.For instance, in the above-described embodiments, can all be coupled to vertical transparent conductive electrode Tc (1)～Tc (k) simultaneously by distinguishing signal f (1)～f (k), but in other embodiments, also can will be able in distinguishing signal f (1)～f (k), partly can distinguishing signal be coupled to the vertical transparent conductive electrode of part in vertical transparent conductive electrode Tc (1)～Tc (k) in batches simultaneously, as long as the composition that simultaneously coupling combined analysis wherein can distinguishing signal forms, can reach the effect of accelerating touch-control system detecting speed, be not limited to once all couplings simultaneously; In addition, all each illustrates its effect with one for above-mentioned signal generator 302, analog-digital converter 304 and arithmetic element 306, but in other embodiments, also can be implemented by a plurality of signal generators, a plurality of analog-digital converter and a plurality of arithmetic element, recycling is responsible for respectively the mode of corresponding transparent conductive electrode or the responsible all transparent conductive electrode of cooperation and is reached its effect.
Moreover the cycle signal of string ripple of can distinguishing signal f (1)～f (k) in above-described embodiment take describes as example, but in other embodiments, cycle signal also can be the periodic waveform that triangular wave or square wave etc. have predominant frequency; And during above-mentioned can distinguishing signal f (1)～f (k) enforcement with cycle signal, composition with discrete Fourier conversion or fast fourier transformational analysis frequency forms to judge touch point, but in other embodiments, while can distinguishing signal f (1)～f (k) also can orthogonal signal implementing, again according to its orthogonality judgement touch point (as same frequency but the signal of phase differential 90 degree can be judged by its orthogonality), even can distinguishing signal f (1)～f (k) can be and have the signal that other can distinctive characteristics, recycling it can distinctive characteristics judgement touch point.
In addition, due to as mechanism characteristicses such as stray capacitance numbers, therefore the signal of characteristic frequency may cause the special decay of induced signal or amplify at the transparent conductive electrode of ad-hoc location, therefore except above-mentioned, fixingly with order that can distinguishing signal f (1)～f (k), be coupled to vertical transparent conductive electrode Tc (1)～Tc (k) simultaneously, in other embodiments, also capable of dynamic distributes the order that can distinguishing signal f (1)～f (k) be coupled to vertical transparent conductive electrode Tc (1)～Tc (k), if very first time point is with can distinguishing signal f (1), f (2), the order of f (k) is coupled to vertical transparent conductive electrode Tc (1)～Tc (k), and the second time point is with can distinguishing signal f (2), f (3), f (k), the order of f (1) is coupled to vertical transparent conductive electrode Tc (1)～Tc (k), so can avoid the transparent conductive electrode of the fixing signal coupling ad-hoc location with characteristic frequency, and cause the special decay of induced signal or amplify.
Further, analog-digital converter 304 can flash type analog-digital converter (Flash-ADC), the analog-digital converters such as a/d converter successive approximation (Successive approximation ADC) or integral triangle analog-digital converter (Sigma-Delta ADC) are implemented, and arithmetic element 306 can central processing unit/random access memory type (CPU/RAM base) arithmetic element (as microprocessor) or specific function arithmetic element implement (as implemented discrete Fourier conversion with example, in hardware, fast fourier conversion, other time domain turn frequency domain or other can judge in induced signal s (1) ＇～s (j) ＇ can distinguishing signal f (1)～f (k) the computing that forms of composition).
Therefore, the touch point positioning action of touch control induction device 30, can be summarized as a touch point positioning flow 70, and as shown in Figure 7, it comprises the following steps:
Step 700: start.
Step 702: produce at least two and can distinguishing signal be coupled respectively in vertical transparent conductive electrode Tc (1)～Tc (k) at least the two simultaneously.
Step 704: induced signal s (1) ＇～s (j) ＇ that receives horizontal transparent conductive electrode Tr (1)～Tr (j).
Step 706: transformation induction signal s (1) ＇～s (j) ＇, with judge in induced signal s (1) ＇～s (j) ＇ these at least two can distinguishing signal composition form.
Step 708: locate at least one touch point on vertical transparent conductive electrode Tc (1)～Tc (k) and the formed touch-control sensing point T of horizontal transparent conductive electrode Tr (1)～Tr (j) (1,1)～T (j, k).
Step 710: finish.
The detailed operation of touch point positioning flow 70 can, with reference to above narration, not repeat them here.
In known technology, when known touch control induction device 10 carries out time domain Scan orientation, owing to scanning one by one vertical transparent conductive electrode Tc (1)～Tc (k) with sweep frequency signal w (1)～w (k), and need the data of matching timing synchronizing signal Syn intercepting induced signal s (1)～s (j), so speed is disturbed slowly and easily.In comparison, main spirits of the present invention is to be coupled simultaneously can distinguishing signal not needed sequentially to scan to vertical transparent conductive electrode, then receive at any time and transformation induction signal, according to composition that can distinguishing signal in induced signal, form judgement touch point position again and do not need to coordinate synchronous, therefore can accelerate touch-control system detecting speed.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (28)
1. a touch-control sensor, is characterized in that, includes:
One touch-control sensing panel, includes a plurality of the first dimension transparent conductive electrodes and a plurality of the second dimension transparent conductive electrode, is used for forming a plurality of touch-control sensing points;
One or more signal generator, is used for producing at least two orthogonal signal and is coupled respectively in the plurality of the first dimension transparent conductive electrode at least the two simultaneously;
One or more analog-digital converter, is coupled to the plurality of the second dimension transparent conductive electrode, is used for receiving a plurality of induced signals of the plurality of the second dimension transparent conductive electrode; And
One or more arithmetic element, is used for changing the plurality of induced signal, to judge that the composition of these at least two orthogonal signal in the plurality of induced signal forms and locates at least one touch point on the plurality of touch-control sensing point.
2. touch-control sensor as claimed in claim 1, is characterized in that, these at least two orthogonal signal are coupled respectively to each in the plurality of the first dimension transparent conductive electrode simultaneously.
3. touch-control sensor as claimed in claim 1, is characterized in that, this one or more analog-digital converter receives the plurality of induced signal of the plurality of the second dimension transparent conductive electrode at any time.
4. touch-control sensor as claimed in claim 1, is characterized in that, these at least two orthogonal signal are orthogonal.
5. touch-control sensor as claimed in claim 1, is characterized in that, these at least two orthogonal signal comprise the cycle signal with different frequency.
6. touch-control sensor as claimed in claim 1, is characterized in that, these at least two orthogonal signal comprise having same frequency but the cycle signal of phase differential 90 degree.
7. touch-control sensor as claimed in claim 1, is characterized in that, these at least two orthogonal signal be coupled respectively in the plurality of the first dimension transparent conductive electrode simultaneously this at least the two order be dynamic assignment.
8. touch-control sensor as claimed in claim 1, is characterized in that, these at least two orthogonal signal are the periodic waveform that string ripple, triangular wave or square wave etc. have predominant frequency.
9. touch-control sensor as claimed in claim 1, is characterized in that, this one or more analog-digital converter is flash type analog-digital converter, a/d converter successive approximation or integral triangle analog-digital converter.
10. touch-control sensor as claimed in claim 1, is characterized in that, this one or more arithmetic element is central processing unit/random access memory type arithmetic element or specific function arithmetic element.
11. 1 kinds of touch-control sensors, is characterized in that, include:
One touch-control sensing panel, includes a plurality of the first dimension transparent conductive electrodes and a plurality of the second dimension transparent conductive electrode, is used for forming a plurality of touch-control sensing points;
One or more signal generator, is used for producing at least two cycle signals and is coupled respectively in the plurality of the first dimension transparent conductive electrode at least the two simultaneously;
One or more analog-digital converter, is coupled to the plurality of the second dimension transparent conductive electrode, is used for receiving a plurality of induced signals of the plurality of the second dimension transparent conductive electrode; And
One or more arithmetic element, is used for changing the plurality of induced signal, to judge that the composition of these at least two cycle signals in the plurality of induced signal forms and locates at least one touch point on the plurality of touch-control sensing point.
12. touch-control sensors as claimed in claim 11, is characterized in that, these at least two cycle signals are coupled respectively to each in the plurality of the first dimension transparent conductive electrode simultaneously.
13. touch-control sensors as claimed in claim 11, is characterized in that, this one or more analog-digital converter receives the plurality of induced signal of the plurality of the second dimension transparent conductive electrode at any time.
14. touch-control sensors as claimed in claim 11, is characterized in that, these at least two cycle signals are orthogonal.
15. touch-control sensors as claimed in claim 11, is characterized in that, these at least two cycle signals comprise the cycle signal with different frequency.
16. touch-control sensors as claimed in claim 11, is characterized in that, these at least two cycle signals comprise having same frequency but the cycle signal of phase differential 90 degree.
17. touch-control sensors as claimed in claim 11, is characterized in that, these at least two cycle signals be coupled respectively in the plurality of the first dimension transparent conductive electrode simultaneously this at least the two order be dynamic assignment.
18. touch-control sensors as claimed in claim 11, is characterized in that, these at least two cycle signals are the periodic waveform that string ripple, triangular wave or square wave etc. have predominant frequency.
19. touch-control sensors as claimed in claim 11, is characterized in that, this one or more analog-digital converter is flash type analog-digital converter, a/d converter successive approximation or integral triangle analog-digital converter.
20. touch-control sensors as claimed in claim 11, is characterized in that, this one or more arithmetic element is central processing unit/random access memory type arithmetic element or specific function arithmetic element.
21. 1 kinds of touch point localization methods, for a touch-control sensor, is characterized in that, include: produce at least two and can distinguishing signal be coupled respectively in a plurality of the first dimension transparent conductive electrodes at least the two simultaneously;
Receive a plurality of induced signals of a plurality of the second dimension transparent conductive electrodes;
Change the plurality of induced signal, with judge in the plurality of induced signal these at least two can distinguishing signal composition form; And
Locate at least one touch point on the plurality of the first dimension transparent conductive electrode and the formed the plurality of touch-control sensing point of the plurality of the second dimension transparent conductive electrode.
22. touch point localization methods as claimed in claim 21, is characterized in that, produce these at least two can distinguishing signal be coupled respectively in the plurality of the first dimension transparent conductive electrode simultaneously this at least the two step include:
Produce these at least two and can distinguishing signal be coupled respectively to each in the plurality of the first dimension transparent conductive electrode simultaneously.
23. touch point localization methods as claimed in claim 21, is characterized in that, the step that receives the plurality of induced signal of the plurality of the second dimension transparent conductive electrode includes:
Receive at any time the plurality of induced signal of the plurality of the second dimension transparent conductive electrode.
24. touch point localization methods as claimed in claim 21, is characterized in that, these at least two can distinguishing signal be orthogonal orthogonal signal.
25. touch point localization methods as claimed in claim 21, is characterized in that, these at least two can distinguishing signal comprise the cycle signal with different frequency.
26. touch point localization methods as claimed in claim 21, is characterized in that, these at least two can distinguishing signal comprise having same frequency but the cycle signal of phase differential 90 degree.
27. touch point localization methods as claimed in claim 21, is characterized in that, also include:
These at least two of dynamic assignment can distinguishing signal be coupled respectively in the plurality of the first dimension transparent conductive electrode this at least order of the two simultaneously.
28. touch point localization methods as claimed in claim 21, is characterized in that, these at least two can distinguishing signal be the periodic waveform that string ripple, triangular wave or square wave etc. have predominant frequency.
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| CN107229364A (en) * | 2016-03-23 | 2017-10-03 | 联咏科技股份有限公司 | Touch-control sensor and its touch-control independent positioning method |
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| CN102576272A (en) * | 2009-10-08 | 2012-07-11 | 3M创新有限公司 | Multi-touch touch device with multiple drive frequencies and maximum likelihood estimation |
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Application publication date: 20140326 |