CN109791448A - Touch detecting method and touch chip - Google Patents
Touch detecting method and touch chip Download PDFInfo
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- CN109791448A CN109791448A CN201780000761.9A CN201780000761A CN109791448A CN 109791448 A CN109791448 A CN 109791448A CN 201780000761 A CN201780000761 A CN 201780000761A CN 109791448 A CN109791448 A CN 109791448A
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
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Abstract
A kind of touch detecting method and touch chip.The touch detecting method comprises determining that the driving signal of touch screen from current frequency frequency hopping to target frequency (S510)；The touch screen is driven with the driving signal of reference frequency, wherein reference frequency and target frequency be not identical (S520)；Original value set of the collection touch work in reference frequency is as the first original value set (S530)；According to the backup benchmark value set of the first original value set and reference frequency, the first touch location (S540) for existing on touch screen and touching is determined；The touch screen (S550) is driven with the driving signal of target frequency；Original value set of the collection touch work in target frequency is as the second original value set (S560)；According to the second original value set and the first touch location, the benchmark value set (S570) of target frequency is determined；According to the benchmark value set of target frequency, the touch location (S580) that touch screen works in target frequency is determined.The touch detecting method and touch chip help to improve the Detection accuracy of touch location on touch screen.
Description
This application involves field of electronic device more particularly to touch detecting method and touch chips.
Capacitance touch screen is a kind of human-computer interaction device, is mainly made of driving electrodes and induction electrode.Driving electrodes can export the driving signal of different frequency according to the parameter of setting, and induction electrode is responsible for receiving inductive signal.
Touch chip, which carries out the operations such as Digital Signal Processing to the signal that induction electrode receives, can obtain original value.When finger touches capacitance touch screen, the collected original value of touch chip, when relative to not having finger touch on capacitance touch screen, the original value that touch chip is acquired from induction electrode can become smaller.
When can be by not having finger touch on capacitance touch screen, the original value that touch chip is acquired from induction electrode be as benchmark.It is subtracted using the benchmark and touches the original value that chip is acquired from induction electrode when having finger touch on capacitance touch screen, so that it may obtained the difference of original value, that is, touch the size of caused original value variable quantity.The coordinate of finger touch point on capacitance touch screen can be determined according to the difference by touching chip, obtain the information such as the position that finger specifically touches.
In use, inevitably there is noise, such as ambient noise, common-mode noise, electromagnetic noise.Noise can make original value become larger or become smaller, become larger or become smaller so as to cause original value difference, and then it will lead on capacitance touch screen and to be touched without finger but touch chip has been mistakenly considered to have on touch or capacitance touch screen that finger touches but touch chip is mistakenly considered no touch or is mistakenly considered the case where there are multiple touch points.
It reduces noise and judges that touching a kind of effective solution of situation on capacitance touch screen is frequency hopping to chip is touched.Specifically, being exactly the frequency for changing the driving signal of driving electrodes.
When driving electrodes input the driving signal of different frequency, touch chip is different according to the original value that the inductive signal that induction electrode exports obtains.Such as, the frequency of the driving signal of driving electrodes input is higher, and touch chip is bigger according to the original value that the inductive signal that induction electrode exports obtains.Therefore, when the driving signal of driving electrodes input different frequency, touch chip should determine the touch location on capacitance touch screen according to different benchmark.
During existing frequency hopping, original value that touch chip after frequency hopping is obtained according to the inductive signal that induction electrode exports is directlyed adopt as benchmark.Which will lead to touch location on capacitance touch screen and fix really
True rate is lower.
Summary of the invention
This application provides touch detecting method and touch chip, the Detection accuracy of touch location on touch screen is helped to improve.
In a first aspect, this application provides a kind of touch detecting methods.The touch detecting method comprises determining that the driving signal of touch screen from current frequency frequency hopping to target frequency；Touch screen is driven with the driving signal of reference frequency, wherein reference frequency is not identical as target frequency；Original value set of the collection touch work in reference frequency is as the first original value set；According to the backup benchmark value set of the first original value set and reference frequency, the first touch location for existing on touch screen and touching is determined；Touch screen is driven with the driving signal of target frequency；Original value set of the collection touch work in target frequency is as the second original value set；According to the second original value set and the first touch location, the benchmark value set of target frequency is determined；According to the benchmark value set of target frequency, the touch location that touch screen works in target frequency is determined.
In the implementation, the first touch location on touch screen is first determined according to the backup benchmark value set of the corresponding first original value set of reference frequency and reference frequency, then the benchmark value set of target frequency is determined further according to the corresponding second original value set of target frequency and the first touch location, exist when touching during facilitating in touch screen by current frequency frequency hopping to target frequency, influence of the touch to the benchmark value set of target frequency is reduced, and then helps to improve the Detection accuracy of touch location on touch screen.
With reference to first aspect, in the first possible implementation, according to the backup benchmark value set of the first original value set and reference frequency, determine the first touch location for existing on touch screen and touching, it include: according to first function, backup benchmark value set and the first original value set are fitted, the undetermined coefficient in first function is obtained；According to backup benchmark value set, the undetermined coefficient and first function obtain fitting benchmark value set；According to fitting benchmark value set and the first original value set, the first touch location is determined.
In the implementation, first the backup benchmark value set of reference frequency and the first original value set are fitted, the function obtained further according to backup benchmark value set and fitting obtains fitting benchmark value set, then the first touch location is just determined according to fitting benchmark value set and the first original value set, influence of the factors such as temperature, noise to the first touch location can be eliminated, so as to further increase the Detection accuracy of touch location on touch screen.
In conjunction with the first possible implementation, in the second possible implementation, first function is linear function, is fitted to least square method fitting.
With reference to first aspect, the first or second of possible implementation, in the third possible realization
In mode, according to the second original value set and the first touch location, determine the benchmark value set of target frequency, comprising: according to the benchmark value set of the second original value set and current frequency, determine a reference value of corresponding first touch location in the benchmark value set of target frequency.
In the implementation, a reference value of corresponding first touch location in the benchmark value set of target frequency is determined according to the benchmark value set of current frequency, can be further improved the Detection accuracy of touch location on determining touch screen.
In conjunction with the third possible implementation, in the fourth possible implementation, according to the benchmark value set of the second original value set and current frequency, the original value of corresponding first touch location in the benchmark value set of target frequency is determined, comprising:
The average value of all original values in the second original value set is calculated as the first average value；
The average value of all a reference values in the benchmark value set of current frequency is calculated as the second average value；
First reference value in the benchmark value set of current frequency is added into the first average value, and after subtracting the second average value resulting numerical value as the second a reference value in the benchmark value set of target frequency, first reference value and the second a reference value are value corresponding with the first touch location, and first reference value is identical as position of second a reference value in the benchmark value set of target frequency in the position in the benchmark value set of current frequency.
With reference to first aspect or the first is to any one possible implementation in the 4th kind, in a fifth possible implementation, touch detecting method further include: the original value set for acquiring touch screen work when not touching on target frequency and touch screen is as the original value set of third；Using the first original value in the original value set of third as the second a reference value in the benchmark value set of target frequency, first original value is original value corresponding with the first touch location in the original value set of third, and the first original value is identical as position of second a reference value in the benchmark value set of target frequency in the position in the original value set of third.
In the implementation, when can determine that touch screen works in target frequency according to the updated benchmark value set of target frequency, touch location on touch screen, to improve the Detection accuracy of touch location on touch screen.
Second aspect, this application provides a kind of touch chips.The touch chip includes that memory, microprocessor controller (microprocessor control unit, MCU), driving circuit and sensor circuit, MCU include processor and conversion circuit.
Wherein, memory is for storing computer program code, reference frequency, the backup benchmark value set of reference frequency, the original value set of dynamic acquisition and benchmark value set of dynamic generation etc..
Processor can control driving signal of the driving circuit to touch screen output corresponding frequencies for executing the computer program code stored in memory, to drive touch screen to work, and generate a reference value collection
It closes, according to original value set and benchmark value set and backup benchmark value set detection touch location etc..
The inductive signal that conversion circuit is used to be acquired according to sensor circuit from touch screen generates original value set.
Driving circuit is under the control of a processor, the driving signal of corresponding frequencies being exported to touch screen.
Sensor circuit is used under the control of a processor, the inductive signal of collection touch output.
Specifically, processor is used to determine the driving signal of touch screen from current frequency frequency hopping to target frequency.
Driving circuit is used to drive touch screen with the driving signal of reference frequency.
Conversion circuit works for touch screen in reference frequency, generates original value set as the first original value set according to the inductive signal of sensor circuit acquisition, wherein reference frequency is not identical as target frequency.
Processor is used for the first original value set acquired according to the backup benchmark value set and conversion circuit of reference frequency, determines the first touch location for existing on the touch screen and touching.
Driving circuit is also used to drive the touch screen with the driving signal of target frequency.
Conversion circuit is also used to touch screen work in target frequency, generates original value set as the second original value set according to the inductive signal of sensor circuit acquisition.
The first touch location that the second original value set and processor that processor is also used to be generated according to conversion circuit determine, determines the benchmark value set of target frequency.
Processor is also used to the benchmark value set according to target frequency, determines the touch location that touch screen works in target frequency.
Touch chip in the embodiment of the present application, the first touch location on touch screen is first determined according to the corresponding first original value set of reference frequency and backup benchmark value set, then the benchmark value set of target frequency is determined further according to the corresponding second original value set of target frequency and the first touch location, exist when touching during facilitating in the driving signal of touch screen by current frequency frequency hopping to target frequency, reduce influence of the touch to the benchmark value set of target frequency, to help to improve the touch detection accuracy rate of touch screen.
In conjunction with second aspect, in the first possible implementation, processor is specifically used for:
According to first function, backup benchmark value set and the first original value set are fitted, the undetermined coefficient in first function is obtained；
According to backup benchmark value set, the undetermined coefficient and first function obtain fitting benchmark value set；
According to fitting benchmark value set and the first original value set, the first touch location is determined.
In conjunction with the first possible implementation, in the second possible implementation, the first function is linear function, described to be fitted to least square method fitting.
In conjunction with second aspect, the first or second of possible implementation, in the third possible realization
In mode, processor is specifically used for the benchmark value set according to the second original value set and current frequency, determines a reference value of corresponding first touch location in the benchmark value set of target frequency.
In conjunction with the third possible implementation, in the fourth possible implementation, processor is specifically used for:
The average value of all original values in the second original value set is calculated as the first average value；
The average value of all a reference values in the benchmark value set of current frequency is calculated as the second average value；
First reference value in the benchmark value set of current frequency is added into first average value, and after subtracting the second average value resulting numerical value as the second a reference value in the benchmark value set of target frequency, first reference value and the second a reference value are value corresponding with the first touch location, and first reference value is identical as position of second a reference value in the benchmark value set of target frequency in the position in the benchmark value set of current frequency.
In conjunction with any one possible implementation in second aspect or second aspect, in a fifth possible implementation, conversion circuit is also used to touch screen working the original value set acquired when not touching on target frequency and touch screen as the original value set of third.
Correspondingly, processor is also used to using the first original value in the original value set of third as the second a reference value in the benchmark value set of target frequency, first original value is original value corresponding with the first touch location in the original value set of third, and the first original value is identical as position of the third a reference value in the benchmark value set of target frequency in the position in the original value set of third.
In a kind of possible design, touch chip provided by the present application may include the module for executing the touch detecting method in the possible implementation of any one in first aspect or first aspect, which can be software and/or hardware.
The another aspect of the application provides a kind of computer readable storage medium, instruction is stored in the computer readable storage medium, when the instruction is run in touch chip, so that touch chip executes the touch detecting method in first aspect or in first aspect in any one possible implementation.
The another aspect of the application provides a kind of computer program product comprising instruction, when it runs in touch chip, so that touch chip executes the touch detecting method in first aspect or first aspect in any one possible implementation.
Fig. 1 is the capacitance touch screen of the embodiment of the present application and the exemplary system figure of touch chip.
Fig. 2 is the benchmark value set exemplary diagram of the application one embodiment.
Fig. 3 is the original value set exemplary diagram of the application one embodiment.
Fig. 4 is the difference set exemplary diagram of the application one embodiment.
Fig. 5 is the exemplary process diagram of the touch detecting method of the embodiment of the present application.
Fig. 6 is the backup benchmark value set exemplary diagram of the application one embodiment.
Fig. 7 is the original value set exemplary diagram of another embodiment of the application.
Fig. 8 is the function coefficients exemplary diagram of the application one embodiment.
Fig. 9 is the fitting benchmark value set exemplary diagram of the application one embodiment.
The difference set exemplary diagram of another embodiment of Figure 10 the application.
Figure 11 is the exemplary block diagram of the touch chip of the application one embodiment.
Figure 12 is the exemplary block diagram of the touch chip of the application another embodiment.
Fig. 1 is the exemplary system figure of capacitance touch screen and touch chip.It should be understood that system shown in fig. 1 is only example, may also include other modules or unit in the system, or including with the intimate module of modules in Fig. 1.Such as, capacitance touch screen shown in FIG. 1 is mutual capacitance touchscreens, and the capacitance touch screen in the embodiment of the present application is also possible to self-capacitance touch screen.
It should be noted that touch chip is referred to as touch control chip or touch controller.
As shown in Figure 1, the capacitance sensor of capacitance touch screen 110 is generally made of driving electrodes (TX) and induction electrode (RX).The position of every driving electrodes and the intersection of every induction electrode may be considered a capacitive sensing node.
Touch chip 120 can input the signal of certain frequency to driving electrodes, which is properly termed as driving signal.Driving signal is output to touch chip by induction electrode after capacitance sensor.Induction electrode is properly termed as inductive signal to the signal that touch chip exports.Touch chip carries out the original value that corresponding capacitive sensing node can be obtained after analog-to-digital conversion and Digital Signal Processing etc. operate to inductive signal.
For example, being can store in the memory of touch chip just like benchmark value set shown in Fig. 2.In Fig. 2, TXiAnd RXjThe corresponding value in the position of intersection has no touch at i-th of driving electrodes of capacitance touch screen and the capacitive sensing node of j-th of induction electrode intersection for determining.I gets 8, j from 1 and also gets 8 from 1.
When there is touch on capacitance touch screen, an example of the collected original value set of touch chip is as shown in Figure 3.Original value set shown in Fig. 3 is subtracted into benchmark value set shown in Fig. 2, obtains difference set as shown in Figure 4.Difference set according to Fig.4, can determine the touch on capacitance touch screen
Position, the corresponding capacitive sensing node of original value specially in dotted line frame shown in Fig. 4.
Capacitance touch screen work its support all frequencies in a frequency when, if influence of noise is excessive, the driving signal of another frequency of its support, i.e. frequency hopping, the influence to avoid noise to the Detection accuracy of touch location on capacitance touch screen can be exported to capacitance touch screen by then touching chip.
In the prior art, the working frequency frequency hopping rate of capacitance touch screen, touch chip can acquire an original value set when touch screen works the frequency after frequency hopping, and when frequency, the benchmark value set of touch location on capacitance touch screen directly is detected after the frequency modulation using the original value set as determining capacitance touch screen work.
If touch chip using the original value set acquired in frequency after touch screen works in frequency hopping as frequency hopping after frequency benchmark value set, there is touch when acquisition on capacitance touch screen, the a reference value that then will lead to after frequency hopping in the benchmark value set of frequency at the touch location is wrong, so as to cause touch misjudgment of the capacitance touch screen work after frequency hopping when frequency at the touch location, i.e. inspection does not measure the touch, and then causes the Detection accuracy of touch location on capacitance touch screen impacted.Therefore the embodiment of the present application proposes a kind of new touch detecting method.
Fig. 5 is the schematic flow chart of the touch detecting method of the application one embodiment.It should be understood that Fig. 5 show the touch detecting method the step of or operation, but these steps or operation are only examples, and the deformation of other operations or each operation in Fig. 5 can also be performed in the embodiment of the present application.
S510 determines the driving signal of touch screen from current frequency frequency hopping to target frequency.
Such as, when touch screen works under the driving of the driving signal of current frequency, touch chip will do it noise measuring, when detecting that noise and noise figure are more than scheduled threshold value, it can be with frequency hopping, i.e. to work with the driving signal of the different frequency of current frequency driving touch screen, in order to reduce the influence of noise.In terms of for subsequent descriptions, the frequency of the driving signal after frequency hopping is known as target frequency.
The touch screen can be capacitive touch screen.
S520 drives touch screen with the driving signal of reference frequency, wherein reference frequency is not identical as target frequency.
That is, determine touch screen driving signal need frequency hopping to target frequency after, can with frequency hopping to the different reference frequency of target frequency.Wherein, reference frequency can be pre-configured.
S530, original value set of the collection touch work in reference frequency is as the first original value set.
Specifically, acquiring original value set, and the original value set is known as the first original value set when driving touch screen with the driving signal of reference frequency.
S540 determines touch screen according to the backup benchmark value set of the first original value set and reference frequency
It is upper to there is the first touch location touched.
That is, can determine that touch screen work has the touch location touched in reference frequency on touch screen according to the backup benchmark value set of the first original value set and reference frequency after acquiring the first original value set in S530.
It is known as the first touch location according to the touch location that the first original value set and the backup benchmark value set of reference frequency determine.
The backup benchmark value set of reference frequency can be pre-configured.For example, can before touch chip factory, the timing nodes such as initial runtime complete configuration.
Before the backup benchmark value set for configuring reference frequency and reference frequency, need first to determine the backup benchmark value set for obtaining reference frequency and reference frequency in other words.
A kind of possible implementation for obtaining the backup benchmark value set of reference frequency and reference frequency may include: to drive touch screen to the driving signal that touch screen inputs multiple frequencies, and the driving signal of each frequency can be repeatedly input repeatedly, in this way, corresponding to the driving signal of each frequency, multiple original value sets can be collected；Multiple original value sets corresponding to the driving signal of each frequency are compared respectively；The corresponding frequency of the smallest multiple original value sets will be changed and be denoted as reference frequency, and by the average value of the corresponding multiple original value sets of the reference frequency, as the backup benchmark value set of reference frequency.
During the backup benchmark value set for obtaining reference frequency, when acquiring original value set, it is generally the case that do not touched on touch screen.In addition, the influence of noise should be reduced as early as possible.
S550 drives touch screen with the driving signal of target frequency.
That is frequency hopping drives touch screen to target frequency with the driving signal of target frequency.
S560, original value set of the collection touch work in target frequency is as the second original value set.
That is, acquiring original value set, and using the original value set as the second original value set when driving touch screen with the driving signal of target frequency.
Under normal conditions, first original value set touch screen work acquired in target frequency is as the second original value set.
It should be understood that the embodiment of the present application does not limit S520, S530 and S550, S560 executes sequence.For example, S550 and S560 can be first carried out, then execute S520 and S530.In other words, the driving signal of touch screen can be first from current frequency frequency hopping to target frequency, and touch chip acquires the second original value set；Then for the driving signal of touch screen again from target frequency frequency hopping to reference frequency, touch chip acquires the first original value set.Hereafter, the driving signal of touch screen again frequency hopping to target frequency.
S570 determines the benchmark value set of target frequency according to the second original value set and the first touch location,
Specifically, being exactly there is the first touch location touched on the second original value set and touch screen acquired according to touch screen work in target frequency, the benchmark value set of target frequency is determined.
S580 determines the touch location that touch screen works in target frequency according to the benchmark value set of target frequency.
That is, determine target frequency when benchmark value set after, original value set when target frequency can be worked in collection touch, and the touch location on touch screen can be determined according to the benchmark value set of the original value set and target frequency.
For example, the benchmark value set of target frequency can be subtracted the original value set acquired when touch screen works in target frequency, difference set is obtained, and the touch location on touch screen is determined according to the difference set.
In the embodiment of the present application, the first touch location for existing on touch screen and touching first is determined according to the backup benchmark value set of reference frequency and the first original value set acquired under reference frequency, then the benchmark value set of target frequency is obtained further according to the acquire under target frequency second original value set and the first touch location, when there is touch during facilitating touch screen from current frequency frequency hopping to target frequency, reduce influence of the touch to the benchmark value set of target frequency, and then helps to improve the Detection accuracy of touch location on touch screen.
In S540, according to the backup benchmark value set of the first original value set and reference frequency, when determining the first touch location for existing on touch screen and touching, a kind of possible implementation may include: according to first function, the backup benchmark value set of reference frequency and the first original value set are fitted, the undetermined coefficient in first function is obtained；According to the backup benchmark value set of reference frequency, first function obtains fitting benchmark value set；According to fitting benchmark value set and the first original value set, the first touch location is determined.
In other words, first the backup benchmark value set of reference frequency and the first original value set are fitted, the function and backup benchmark value set obtained further according to fitting obtains fitting benchmark value set, then just determines the first touch location according to fitting benchmark value set and the first original value set.This helps to eliminate the influences of the factors to the first touch location such as temperature, noise, so as to further increase the Detection accuracy of touch location on touch screen.
Optionally, used first function can be linear function when being fitted to the backup benchmark value set of reference frequency and the first original value set, if first function can be y=m*x+b.
Optionally, when being fitted to the backup benchmark value set of reference frequency and the first original value set, a kind of possible fit approach can be least square method fitting.It specifically, can be by backup a reference value collection
Independent variable of the value in the driving signal direction in conjunction in driving electrodes as first function is fitted using the value in the driving signal direction in the first original value set in driving electrodes as the dependent variable of first function.
After fitting obtains first function, first function can be substituted into using backup benchmark value set as independent variable, obtain corresponding functional value, these functional values composition fitting benchmark value set.
Optionally, touch chip can will be fitted the original value set of benchmark and subtract the first original value set, obtain original value difference set, and obtain the first touch location according to the original value difference set.
How the first touch location is determined according to the backup benchmark value set of reference frequency and the first original value set with a more detailed example introduction below.
The example of the backup benchmark value set of reference frequency is as shown in fig. 6, the example of the first original value set of reference frequency is as shown in Figure 7.Least square method fitting is carried out, the value of obtained i-th of m and b are as shown in the i-th column in Fig. 8, wherein i gets 8 from 1 using the i-th column original value in Fig. 7 as the dependent variable y of the function using the i-th column a reference value in Fig. 6 as the independent variable x in function y=m*x+b.
It is substituted into the i-th column a reference value in Fig. 6 as independent variable x in the linear function according to determined by the i-th column m and b in Fig. 8, obtains the fitting a reference value such as the i-th column in Fig. 9.
Fitting benchmark value set shown in Fig. 9 is subtracted into the shown in Fig. 7 first original value set, obtains difference set as shown in Figure 10.Difference set according to Fig.10, can determine the first touch location, the i.e. position of the corresponding capacitive sensing node of difference in dotted line shown in Figure 10.
It should be understood that the method that the above-mentioned backup benchmark value set according to the first original value set and reference frequency determines the first touch location, only exemplary illustration, the embodiment of the present application do not limit this.For example, the backup benchmark value set of reference frequency can be subtracted the first original value set, and the first touch location is determined according to obtained difference set.
In S570, the the second original value set and the first touch location acquired according to touch screen work in target frequency, determine the benchmark value set of target frequency, it may include: the benchmark value set according to the second original value set and current frequency, determine a reference value of corresponding first touch location in the benchmark value set of target frequency.
Specifically, can have that one or more a reference values are corresponding with the first touch location in the benchmark value set of target frequency, a reference value corresponding with the first touch location can be obtained by the benchmark value set of the second original value set and current frequency in the benchmark value set of target frequency.
According to the benchmark value set of the second original value set and current frequency, when determining a reference value for corresponding to first touch location in the benchmark value set of target frequency, a kind of possible implementation may include:
The average value of all original values in the second original value set is calculated as the first average value；The average value of all a reference values in the benchmark value set of current frequency is calculated as the second average value；First reference value in the benchmark value set of current frequency is added into the first average value, and after subtracting the second average value resulting numerical value as the second a reference value in the benchmark value set of target frequency, first reference value and the second a reference value are value corresponding with the first touch location, and first reference value is identical as position of second a reference value in the benchmark value set of target frequency in the position in the benchmark value set of current frequency.
Wherein, first reference value is an a reference value in the benchmark value set of current frequency in a reference value corresponding with the first touch location, and the second a reference value is an a reference value in the benchmark value set of target frequency in a reference value corresponding with the first touch location.
It should be understood that all a reference values corresponding with the first touch location can be obtained according to the method for above-mentioned the second a reference value of determination in the benchmark value set of target frequency.In the benchmark value set of target frequency it is corresponding with the first touch location outside a reference value can directly by the second original value set with the first touch location it is corresponding outside original value obtain, it can original value outside will be corresponding with the first touch location in the second original value set as in the benchmark value set of target frequency with the first touch location it is corresponding outside a reference value.
It should be noted that, it is a kind of possible the result is that there is no touch on touch screen when determining the first touch location for existing on touch screen and touching according to the backup benchmark value set of the first original value set and reference frequency in S540, that is, the first touch location can be sky.At this time, in S570, according to the second original value set and the first touch location, when determining the benchmark value set of target frequency, the benchmark value set for obtaining target frequency can be the second original value set, it can directly using the second original value set as the benchmark value set of target frequency.
When the first touch location determined in S540 is not empty, and the benchmark value set of target frequency is when being determined to obtain according to the benchmark value set of the second original value set and current frequency, the inspection touch detecting method of the embodiment of the present application can also include: that touch screen is worked the original value set acquired when not touching on target frequency and touch screen as the original value set of third；Using the first original value in the original value set of third as the second a reference value in the benchmark value set of target frequency, first original value is original value corresponding with the first touch location in the original value set of third, and the first original value is identical as position of second a reference value in the benchmark value set of target frequency in the position in third benchmark value set.
In other words, when being worked according to touch screen in target frequency, the original value set of third that acquires is determined when not touching on the first touch location, updates a reference value corresponding with the first touch location in the benchmark value set of target frequency.The touch detection rate accuracy rate that touch screen works in no touch on target frequency and the first touch location on the first touch location is helped to improve in this way, and then improves the touch detection of touch screen
Accuracy rate.
Wherein, the first original value is an original value in the original value set of third in original value corresponding with the first touch location.
It should be noted that each a reference value in the benchmark value set of target frequency in a reference value corresponding with the first touch location can be realized according to the method for above-mentioned the second a reference value of update during the benchmark value set of update target frequency.
Figure 11 is the exemplary block diagram of the touch chip of the application one embodiment, which may be implemented the function of the touch chip in embodiment illustrated in fig. 5.It should be understood that the touch chip 1100 shown in Figure 11 is only example, the touch chip of the embodiment of the present application may also include other modules or unit, perhaps includes intimate module with the modules in Figure 11 or does not really want to include all modules in Figure 11.
First processing module 1110, for determining the driving signal of touch screen from current frequency frequency hopping to target frequency.
Drive module 1120, for driving touch screen with the driving signal of reference frequency.
Acquisition module 1130, for original value set of the collection touch work in reference frequency as the first original value set, wherein reference frequency is not identical as target frequency.
Second processing module 1140, the first original value set for being acquired according to the backup benchmark value set and acquisition module of reference frequency determine the first touch location for existing on touch screen and touching.
Drive module 1120 is also used to drive touch screen with the driving signal of target frequency.
Acquisition module 1130 is also used to acquire original value set as the second original value set when touch screen works in target frequency.
Third processing module 1150, the first touch location that the second original value set and Second processing module for being acquired according to acquisition processing module determine, determines the benchmark value set of target frequency.
Second processing module 1140 is also used to the benchmark value set according to target frequency, determines the touch location that touch screen works in target frequency.
Touch chip in the embodiment of the present application, the first touch location on touch screen is first determined according to the corresponding first original value set of reference frequency and backup benchmark value set, then the benchmark value set of target frequency is determined further according to the corresponding second original value set of target frequency and the first touch location, exist when touching during facilitating in the driving signal of touch screen by current frequency frequency hopping to target frequency, reduce influence of the touch to the benchmark value set of target frequency, to help to improve the touch detection accuracy rate of touch screen.
Optionally, first processing module 1110 can be specifically used for: according to first function, to backup base
Quasi- value set and the first original value set are fitted, and obtain the undetermined coefficient in first function；According to backup benchmark value set, the undetermined coefficient and first function obtain fitting benchmark value set；According to fitting benchmark value set and the first original value set, the first touch location is determined.
Optionally, first function can be linear function, and the fitting can be fitted for least square method.
Optionally, third processing module 1150 can be specifically used for: according to the benchmark value set of the second original value set and current frequency, determine a reference value of corresponding first touch location in the benchmark value set of target frequency.
Optionally, third processing module 1150 is specifically used for:
The average value of all original values in the second original value set is calculated as the first average value；
The average value of all a reference values in the benchmark value set of current frequency is calculated as the second average value；
First reference value in the benchmark value set of current frequency is added into the first average value, and after subtracting the second average value resulting numerical value as the second a reference value in the benchmark value set of target frequency, first reference value and the second a reference value are value corresponding with the first touch location, and first reference value is identical as position of second a reference value in the benchmark value set of target frequency in the position in the benchmark value set of current frequency.
Optionally, acquisition module 1130 is also used to touch screen working the original value set acquired when not touching on target frequency and touch screen as the original value set of third.
Accordingly, third processing module 1150 is also used to using the first original value in the original value set of third as the second a reference value in the benchmark value set of target frequency, first original value is original value corresponding with the first touch location in the original value set of third, and the first original value is identical as position of the third a reference value in the benchmark value set of target frequency in the position in the original value set of third.
It should be understood that above and other operation and/or function of each unit of the touch chip of the embodiment of the present application shown in Figure 11 can be respectively with further reference to the corresponding process executed in embodiment illustrated in fig. 5 by touch chip be realized, for sake of simplicity, details are not described herein.
Figure 12 is the schematic diagram of the touch chip of the application another embodiment.The touch chip for realizing touch chip in embodiment illustrated in fig. 5 function.It should be understood that the touch chip 1200 shown in Figure 12 is only example, the touch chip of the embodiment of the present application may also include other modules or unit, perhaps includes intimate module with the modules in Figure 12 or does not really want to include all modules in Figure 12.
Memory 1210 stores computer program code, reference frequency, the backup benchmark value set of reference frequency, the original value set of dynamic acquisition and benchmark value set of dynamic generation etc..
Processor 1221 in MCU 1220 executes the computer program code stored in memory, and can
To control driving signal of the driving circuit 1230 to touch screen output corresponding frequencies, to drive touch screen to work, and benchmark value set is generated, according to original value set and benchmark value set and backup benchmark value set detection touch location etc..
Conversion circuit 1222 generates original value set according to the inductive signal that sensor circuit 1240 is acquired from touch screen.
Driving circuit 1230 is under the control of MCU 1220, to the driving signal of touch screen output corresponding frequencies.
Sensor circuit 1240 is under the control of MCU 1220, the inductive signal of collection touch output.
Specifically, processor 1221 is used to determine the driving signal of touch screen from current frequency frequency hopping to target frequency.
Driving circuit 1230 is used to drive touch screen with the driving signal of reference frequency.
Conversion circuit 1222 works for touch screen in reference frequency, and the inductive signal acquired according to sensor circuit 1240 generates original value set as the first original value set, wherein reference frequency is not identical as target frequency.
Processor 1221 is used for the first original value set acquired according to the backup benchmark value set and conversion circuit 1222 of reference frequency, determines the first touch location for existing on the touch screen and touching.
Driving circuit 1230 is also used to drive the touch screen with the driving signal of target frequency.
Conversion circuit 1222 is also used to touch screen work in target frequency, and the inductive signal acquired according to sensor circuit 1240 generates original value set as the second original value set.
The first touch location that the second original value set and processor 1221 that processor 1221 is also used to be generated according to conversion circuit 1222 determine, determines the benchmark value set of target frequency.
Processor 1221 is also used to the benchmark value set according to target frequency, determines the touch location that touch screen works in target frequency.
Touch chip in the embodiment of the present application, the first touch location on touch screen is first determined according to the corresponding first original value set of reference frequency and backup benchmark value set, then the benchmark value set of target frequency is determined further according to the corresponding second original value set of target frequency and the first touch location, exist when touching during facilitating in the driving signal of touch screen by current frequency frequency hopping to target frequency, reduce influence of the touch to the benchmark value set of target frequency, to help to improve the touch detection accuracy rate of touch screen.
Optionally, processor 1221 is specifically used for:
According to first function, backup benchmark value set and the first original value set are fitted, the undetermined coefficient in first function is obtained；
According to backup benchmark value set, the undetermined coefficient and first function obtain fitting benchmark value set；
According to fitting benchmark value set and the first original value set, the first touch location is determined.
Optionally, the first function is linear function, described to be fitted to least square method fitting.
Optionally, processor 1221 is specifically used for: according to the benchmark value set of the second original value set and current frequency, determining a reference value of corresponding first touch location in the benchmark value set of target frequency.
Optionally, processor 1221 is specifically used for:
The average value of all original values in the second original value set is calculated as the first average value；
The average value of all a reference values in the benchmark value set of current frequency is calculated as the second average value；
First reference value in the benchmark value set of current frequency is added into first average value, and after subtracting the second average value resulting numerical value as the second a reference value in the benchmark value set of target frequency, first reference value and the second a reference value are value corresponding with the first touch location, and first reference value is identical as position of second a reference value in the benchmark value set of target frequency in the position in the benchmark value set of current frequency.
Optionally, conversion circuit 1222 is also used to touch screen working the original value set acquired when not touching on target frequency and touch screen as the original value set of third.
Correspondingly, processor 1221 is also used to using the first original value in the original value set of third as the second a reference value in the benchmark value set of target frequency, first original value is original value corresponding with the first touch location in the original value set of third, and the first original value is identical as position of the third a reference value in the benchmark value set of target frequency in the position in the original value set of third.
It should be understood that above and other operation and/or function of each unit of the touch chip of the embodiment of the present application shown in Figure 12 can be respectively with further reference to the corresponding process executed in embodiment illustrated in fig. 5 by touch chip be realized, for sake of simplicity, details are not described herein.
Those of ordinary skill in the art may be aware that unit described in conjunction with the examples disclosed in the embodiments of the present disclosure and algorithm steps, can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Professional technician can use different methods to achieve the described function each specific application, but this realization is it is not considered that exceed scope of the present application.
It is apparent to those skilled in the art that for convenience and simplicity of description, system, the specific work process of device and unit of foregoing description can refer to corresponding processes in the foregoing method embodiment, details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, device and
Method may be implemented in other ways.Such as, the apparatus embodiments described above are merely exemplary, such as, the division of the unit, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed mutual coupling, direct-coupling or communication connection can be through some interfaces, the indirect coupling or communication connection of device or unit, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, and component shown as a unit may or may not be physical unit, it can and it is in one place, or may be distributed over multiple network units.It can some or all of the units may be selected to achieve the purpose of the solution of this embodiment according to the actual needs.
In addition, each functional unit in each embodiment of the application can integrate in one processing unit, it is also possible to each unit and physically exists alone, can also be integrated in one unit with two or more units.
In the above-described embodiments, it can be realized wholly or partly by software, hardware, firmware or any combination thereof.When implemented in software, it can entirely or partly realize in the form of a computer program product.The computer program product includes one or more computer instructions.When loading on computers and executing the computer program instructions, entirely or partly generate according to process or function described in the embodiment of the present invention.The computer can be general purpose computer, special purpose computer, computer network or other programmable devices.The computer instruction may be stored in a computer readable storage medium, or it is transmitted from a computer readable storage medium to another computer readable storage medium, for example, the computer instruction can be transmitted from a web-site, computer, server or data center by wired (such as coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (such as infrared, wireless, microwave etc.) mode to another web-site, computer, server or data center.The computer readable storage medium can be any usable medium that computer can access or include the data storage devices such as one or more usable mediums integrated server, data center.The usable medium can be magnetic medium, (for example, floppy disk, hard disk, tape), optical medium (for example, DVD) or semiconductor medium (such as solid state hard disk Solid State Disk (SSD)) etc..
It is described above; the only specific embodiment of the application, but the protection scope of the application is not limited thereto, and anyone skilled in the art is within the technical scope of the present application; it can easily think of the change or the replacement, should all cover within the scope of protection of this application.Therefore, the protection scope of the application should be based on the protection scope of the described claims.
Claims (12)
- A kind of touch detecting method characterized by comprisingDetermine the driving signal of touch screen from current frequency frequency hopping to target frequency；The touch screen is driven with the driving signal of reference frequency, wherein the reference frequency and the target frequency be not identical；Touch original value of the touch screen work in the reference frequency is acquired as the first original value set；According to the backup benchmark value set of the described first original value set and the reference frequency, the first touch location for existing on the touch screen and touching is determined；The touch screen is driven with the driving signal of the target frequency；Touch original value of the touch screen work in the target frequency is acquired as the second original value set；According to the described second original value set and first touch location, the benchmark value set of the target frequency is determined；According to the benchmark value set of the target frequency, the touch location that the touch screen works in the target frequency is determined.
- Touch detecting method according to claim 1, which is characterized in that the backup benchmark value set according to the described first original value set and the reference frequency determines the first touch location for existing on the touch screen and touching, comprising:According to first function, the backup benchmark value set and the first original value set are fitted, the undetermined coefficient in the first function is obtained；According to the backup benchmark value set, the undetermined coefficient and the first function obtain fitting benchmark value set；According to the fitting benchmark value set and the first original value set, first touch location is determined.
- Touch detecting method according to claim 2, which is characterized in that the first function is linear function, described to be fitted to least square method fitting.
- Touch detecting method according to any one of claim 1 to 3, which is characterized in that it is described according to the described second original value set and first touch location, determine the benchmark value set of the target frequency, comprising:According to the benchmark value set of the described second original value set and the current frequency, the target is determined The a reference value of first touch location is corresponded in the benchmark value set of frequency.
- Touch detecting method according to claim 4, it is characterized in that, the benchmark value set according to the described second original value set and the current frequency, determines a reference value that first touch location is corresponded in the benchmark value set of the target frequency, comprising:The average value of all original values in the described second original value set is calculated as the first average value；The average value of all a reference values in the benchmark value set of the current frequency is calculated as the second average value；First reference value in the benchmark value set of the current frequency is added into first average value, and after subtracting second average value resulting numerical value as the second a reference value in the benchmark value set of the target frequency, the first reference value and second a reference value are value corresponding with first touch location, and the first reference value is identical as position of second a reference value in the benchmark value set of the target frequency in the position in the benchmark value set of the current frequency.
- Touch detecting method according to claim 4 or 5, which is characterized in that the touch detecting method further include:The original value set that touch screen work is acquired when no touch at the target frequency and first touch location is as the original value set of third；Using the first original value in the original value set of the third as second a reference value in the benchmark value set of the target frequency, first original value is original value corresponding with first touch location in the original value set of the third, and first original value is identical as position of second a reference value in the benchmark value set of the target frequency in the position in the original value set of the third.
- A kind of touch chip characterized by comprisingFirst processing module, for determining the driving signal of touch screen from current frequency frequency hopping to target frequency；Drive module, for driving the touch screen with the driving signal of reference frequency；Acquisition module, for acquiring original value set of the touch screen work in the reference frequency as the first original value set；Second processing module determines the first touch location for existing on the touch screen and touching for the described first original value set according to the backup benchmark value set of the reference frequency and acquisition module acquisition；The drive module is also used to drive the touch screen with the driving signal of the target frequency；The acquisition module is also used to the touch screen work and acquires original value collection in the target frequency Cooperation is the second original value set；Third processing module, first touch location that the described second original value set and the Second processing module for being acquired according to the acquisition module determine, determines the benchmark value set of the target frequency；The benchmark value set for the target frequency that the Second processing module is also used to be determined according to the third processing module determines the touch location that the touch screen works in the target frequency.
- Touch chip according to claim 7, which is characterized in that the Second processing module is specifically used for:According to first function, the backup benchmark value set and the first original value set are fitted, the undetermined coefficient in the first function is obtained；According to the backup benchmark value set, the undetermined coefficient and the first function obtain fitting benchmark value set；According to the fitting benchmark value set and the first original value set, first touch location is determined.
- Touch chip according to claim 8, which is characterized in that the first function is linear function, described to be fitted to least square method fitting.
- Touch chip according to any one of claims 7 to 9, which is characterized in that the third processing module is specifically used for:According to the benchmark value set of the described second original value set and the current frequency, a reference value that first touch location is corresponded in the benchmark value set of the target frequency is determined.
- Touch chip according to claim 10, which is characterized in that the third processing module is specifically used for:The average value of all original values in the described second original value set is calculated as the first average value；The average value of all a reference values in the benchmark value set of the current frequency is calculated as the second average value；First reference value in the benchmark value set of the current frequency is added into first average value, and after subtracting second average value resulting numerical value as the second a reference value in the benchmark value set of the target frequency, the first reference value and second a reference value are value corresponding with first touch location, and the first reference value is identical as position of second a reference value in the benchmark value set of the target frequency in the position in the benchmark value set of the current frequency.
- Touch chip described in 0 or 11 according to claim 1, which is characterized in that the acquisition mould The original value set that block is also used to acquire when the touch screen is worked in no touch at the target frequency and first touch location is as the original value set of third；The third processing module is also used to using the first original value in the original value set of the third as second a reference value in the benchmark value set of the target frequency, first original value is original value corresponding with first touch location in the original value set of the third, and first original value is identical as position of the third a reference value in the benchmark value set of the target frequency in the position in the original value set of the third.
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| PCT/CN2017/095262 WO2019023878A1 (en) | 2017-07-31 | 2017-07-31 | Touch detection method and touch chip |
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| CN112363639B (en) * | 2020-11-11 | 2023-04-18 | 青岛海信商用显示股份有限公司 | Intelligent device and control method thereof |
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| CN109791448B (en) | 2021-11-12 |
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