CN104423734B - For detecting noise for touch panel and performing the method and controller of signal control - Google Patents
For detecting noise for touch panel and performing the method and controller of signal control Download PDFInfo
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- CN104423734B CN104423734B CN201310375845.4A CN201310375845A CN104423734B CN 104423734 B CN104423734 B CN 104423734B CN 201310375845 A CN201310375845 A CN 201310375845A CN 104423734 B CN104423734 B CN 104423734B
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- cycle
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- critical value
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- G—PHYSICS
- 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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
Abstract
A kind of method and controller for being used to detect noise for touch panel and perform signal control, this method can determine whether that how many is influenceed in cycle by noise, and whether a number in the cycle by judging to be influenceed by noise is more than one first critical value to determine whether frame data are influenceed by noise, wherein when the number in the cycle influenceed by noise is more than first critical value, judge the frame data by influence of noise, and whether a number of the continuous frame data affected by noise for determining to be judged is more than one second critical value, and produces a judged result；And adjust a frequency of the transmission signal according to the judged result.
Description
Technical field
Disclosed embodiment of this invention is related to a touch surface version, more particularly to one kind can detect touch surface exactly
The noise of version and the method and controller for performing signal control.
Background technology
At present the manufacture requirement for capacitance type touch-control panel contains the degree of accuracy (accuracy) and shake
（jitter）Strict test, designer without be not intended to improve signal to noise ratio（Signal to Noise Ratio, SNR）To meet
These conditions.Signal to noise ratio can be reached by strengthening signal or suppressing noise, for capacitance type touch-control panel, mainly
Noise come from element beyond panel, such as Liquid Crystal Module（Liquid Crystal Module, LCM）, power supply and light
Source.Therefore, how detecting exactly and reducing noise turns into this field urgent problem to be solved.
The content of the invention
Therefore, an object of the present invention is to provide a kind of noise that can detect touch surface version and performs signal control
The method and CCU of system, it can exactly be detected using a simple algorithm and be effectively reduced touch surface
The noise of plate.
According to one embodiment of the invention, propose a kind of noise for being used for detecting a contact panel and perform signal control
Method, the wherein contact panel include a plurality of sense wire and a plurality of drives line, and the sense wire and the drives line are each other
Intersect.This method includes：（a）Multiple transmission signals are respectively sent to these drives lines of the contact panel in order；（b）
The data in multiple cycles are received, wherein when a transmission signal is enabled and is input to corresponding drives line, a cycle
Data are the numerical datas in the multiple reception signals obtained from these sense wires, and the data in the plurality of cycle form this and touched
Control a frame data of panel；（c）Judge how many is influenceed in cycle by noise；（d）Pass through the cycle for judging to be influenceed by noise
A number whether be more than one first critical value and determine whether the frame data are influenceed by noise, wherein influenceed when by noise
The number in cycle when being more than first critical value, judge the frame data by influence of noise；（e）Repeat step（a）~（d）With
Whether one number of the continuous frame data affected by noise for determining to be judged is more than one second critical value, and produces one and judge knot
Fruit；And（f）A frequency of the transmission signal is adjusted according to the judged result.
According to another embodiment of the present invention, a kind of controller for being used for a contact panel, wherein the contact panel bag are proposed
Containing a plurality of sense wire and a plurality of drives line, and the sense wire and the drives line are intersected with each other, and the controller includes：One
Microprocessor and a program code, the wherein program code are stored in a storage device of the controller；When the microprocessor
When performing the program code, the program code can perform following step：（a）Multiple transmission signals are respectively sent in order
These drives lines of the contact panel；（b）The data in multiple cycles are received, wherein when a transmission signal is enabled and is input to
During corresponding drives line, the data in a cycle are the numerical datas in the multiple reception signals obtained from these sense wires, and
The data in the plurality of cycle form a frame data of the contact panel；（c）Judge how many is influenceed in cycle by noise；（d）
Whether one first critical value is more than to determine whether the frame data are made an uproar by a number in the cycle for judging to be influenceed by noise
Sound is influenceed, wherein when the number in the cycle influenceed by noise is more than first critical value, judges that the frame data are made an uproar
Sound shadow is rung；（e）Repeat step（a）~（d）Whether one number of the continuous frame data affected by noise judged with decision is big
In one second critical value, and produce a judged result；And（f）The one of transmission signal frequency is adjusted according to the judged result
Rate.
, can be by using a letter in the present invention is used to detect noise for touch panel and perform the method for signal control
Single algorithm carrys out detection noise exactly, and can reduce noise by merely changing the frequency of transmission signal again.
Brief description of the drawings
Fig. 1 is the schematic diagram of the contact panel according to one embodiment of the invention.
Fig. 2 is the schematic diagram of the example in multiple cycles of the data of the reception signal of corresponding transmission signal.
Fig. 3 is to be used for detecting the noise of touch surface version exactly according to one embodiment of the invention and perform signal control
The flow chart of method.
【Symbol description】
100 contact panels
110 controllers
112 microprocessors
114 program codes
300~326 steps
Embodiment
Some vocabulary has been used among specification and appended claims to censure specific element.This area skill
Art personnel are, it is to be appreciated that manufacturer may call same element with different nouns.This specification and appended right
Claim is used as differentiation not in a manner of the difference of title is used as and distinguishes element with the difference of element functionally
Criterion.It is an open term in the "comprising" of specification in the whole text and appended claims mentioned in, therefore should
It is construed to " include but be not limited to ".In addition, " coupling " one word is herein comprising any direct and indirect electrical connection.Cause
This, if the first device of described in the text one is coupled to a second device, this can be directly electrically connected in by representing the first device
Second device, or be electrically connected indirectly to the second device by other devices or connection means.
Fig. 1 is refer to, Fig. 1 is the schematic diagram of the contact panel 100 according to one embodiment of the invention.In this embodiment
In, the capacitance type touch-control panel of contact panel 100 1, and contact panel 100 includes a plurality of drives line, a plurality of sense wire（Herein
19 drives line DL1-DL19 and 11 sense wire SL1-SL11 are shared in embodiment）And a controller 110, wherein controlling
Device 110 includes a microprocessor 112 and a program code 114, and wherein program code 114 is stored in controller 110
One storage device.Drives line DL1-DL19 and sense wire SL1-SL11 can intersect (intersect) to form an array, control
Multiple transmission signal T1-T19 can be respectively sent to drives line DL1-DL19 by device 110 in order（It is respective to transmit signal T1-T19
What the cycle being enabled did not overlapped each other）, and the phase in each enable cycle in these enable cycles for transmitting signal T1-T19
Between in, controller 110 multiple reception signal R1-R11 can be received from sense wire SL1-SL11 with determine on contact panel 100 whether
There is one or multiple touch points.
Fig. 2 is refer to, Fig. 2 is multiple cycles of the data of the reception signal R1-R11 corresponding to transmission signal T1-T19
(cycle) schematic diagram of example.Data shown in Fig. 2 are numerical data：Multiple simulations are had in controller 110 to number
Word converter, analog receiving signal R1-R11 can be converted to input data by it.As shown in Fig. 2 when transmission signal T1 is enabled
And when being input to corresponding drives line DL1, controller 100 can receive reception signal R1-R11 to produce the number in cycle 1
According to；Then when transmission signal T2 is enabled and is input to corresponding drives line DL2, controller 100 can receive reception letter
Number R1-R11 are to produce the data in cycle 2, and the rest may be inferred.All data shown in Fig. 2（The data in cycle in cycle 1- 19）It is
Frame data (frame data, drawing frame data), and this frame data corresponds to drives line DL1-DL19 and sense wire SL1-SL11 institutes
The multiple intersection regions formed.Data shown in Fig. 2 can be used to judge whether to occur on contact panel 100 one or
Multiple touch points, and judge to be somebody's turn to do（A bit）The position of touch point.
Ideally, when there is not touch point on contact panel 100, the data shown in Fig. 2 should be 0,
And when occurring a touch point on contact panel 100, the numerical value of the corresponding data shown in Fig. 2 should be very big（Such as 50
~250）.Because noise is caused by Liquid Crystal Module, power supply and/or light source, however, even if not touched on contact panel 100
During control point, the data shown in Fig. 2 will not also be equal to 0.
Refer to Fig. 3, Fig. 3 be according to one embodiment of the invention be used for detecting exactly touch surface version 100 noise and
Perform the flow chart of the method for signal control.Flow shown in Fig. 3 is by the configuration processor code 114 of microprocessor 112 come real
Make.With reference to figure 3, details are as follows for the flow.
In step 300, flow starts.In step 302, a parameter n is set to 0.In step 304, it is current to one
Cycle for（Such as the cycle 1 shown in Fig. 2）, a maximum and a minimum value in the cycle can be determined.In step 306
In, it can judge whether the minimum value is more than a critical value A（In this embodiment, A is 3 or 4）If the minimum value is more than A,
Then flow can enter step 308, and otherwise flow enters step 312.In step 308, the maximum and the minimum can be judged
Whether the difference between value is less than a critical value B（In this embodiment, B 10）If the difference is less than B, flow
Step 310 can be entered, otherwise flow enters step 312.In the step 310, parameter n value can be incremented by units of 1.In step
In rapid 312, determine whether to there are next cycle, if next cycle is present, flow can return to step 304, otherwise
Flow can enter step 314.
Above-mentioned steps 302~312 are used for judging in frame data that how many is influenceed in cycle by noise, and parameter n is is made an uproar
The periodicity that sound is influenceed.By taking the frame data shown in Fig. 2 as an example, it is assumed that A is equal to 3 and B and is equal to 0, only cycle 7 and week
Phase 8 is judged as by influence of noise（Minimum value is more than 3 and difference is less than 10）, and parameter n is equal to 2.
In a step 314, it can judge whether parameter n is more than a critical value C（In this embodiment, C 2）.If parameter
N is more than critical value C, then flow can enter step 318, and the value of a parameter m can be incremented by units of 1（Parameter m is in initial shape
0 is set as under state）, otherwise flow can enter step 316 and is set to 0 by parameter m.In step 320, parameter m can be judged whether
More than a critical value D（In this embodiment, D is 1 or 2）If parameter m is more than D, flow can enter step 322 and omit
Micromodification becomes transmission signal T1-T19 frequency（But the normal operating of contact panel 100 is not influenceed）；Otherwise, flow can enter step
In 324.In step 324, determine whether to there are a next frame, if the next frame is present, flow can return to step
302；Otherwise, flow can enter step 326 and end operation.
Above-mentioned steps 314~324 are used for judging whether present frame is influenceed by noise, and judge how many successive frame quilt
Noise is influenceed, and parameter m is used for representing the continuous frame number influenceed by noise.Assuming that C is equal to 2, only by noise institute shadow
Loud periodicity（That is parameter n）During more than 2, it can just judge the frame by influence of noise.By taking Fig. 2 as an example, due to only having for two weeks
Phase is judged as by influence of noise, therefore is judged these frames in Fig. 2 and be not affected by the influence of noise.In addition, it is assumed that
D is equal to 1, and when two or more than two frames are judged as by influence of noise, controller 110 can slightly change transmission
Signal T1-T19 frequency；Otherwise transmission signal T1-T19 frequency is not changed.
The flow shown in Fig. 3 can be all performed in the whole operation process of contact panel 100, controller 110 can be instant
Detect the noise of contact panel 100 and perform signal control in ground.
In the flow shown in Fig. 3, wherein used method confirms/detected whether to change biography using four conditions
The number of delivering letters T1-T19 frequency is to reduce noise：
Condition 1：In a cycle, minimum value is more than A；
Condition 2：In a cycle, the difference between maximum and minimum value is less than B；
Condition 3：In a frame, n cycle meets condition 1 and condition 2, and wherein n is more than C；And
Condition 4：M successive frame meets condition 3, and wherein m is more than D.
If meeting condition 4, then controller 110, which is understood, slightly adjusts the frequency for transmitting signal T1-T19 to reduce touch-control
The noise of panel.
Step 306, step 308 and above-mentioned condition 1 and condition 2 are only to provide illustrative purposes, in other embodiments,
It can determine whether the cycle is influenceed by noise using other practices or judgment mechanism.
In brief, in the present invention is used to detect noise for touch panel and perform the method for signal control, Ke Yitong
Cross and carry out detection noise exactly using a simple algorithm, and can be dropped again by merely changing the frequency of transmission signal
The low noise.
Claims (8)
1. a kind of noise for being used for detecting a contact panel and the method for performing signal control, the wherein contact panel include
A plurality of sense wire and a plurality of drives line, and the sense wire and the drives line are intersected with each other, this method includes：
（a）Multiple transmission signals are respectively sent to these drives lines of the contact panel in order；
（b）The data in multiple cycles are received, wherein when a transmission signal is enabled and is input to a corresponding drives line,
The data in one cycle are the numerical datas in the multiple reception signals obtained from these sense wires, and the data in the plurality of cycle
Form a frame data of the contact panel；
（c）Judge how many is influenceed in cycle by noise；
（d）It is to determine the frame data by the way that whether a number in the cycle for judging to be influenceed by noise is more than one first critical value
It is no to be influenceed by noise, wherein when the number in the cycle influenceed by noise is more than first critical value, judge the frame number
According to by influence of noise；
（e）Repeat step（a）~（d）Whether it is more than one with a number of the continuous frame data affected by noise for determining to be judged
Second critical value, and produce a judged result；And
（f）A frequency of the transmission signal is adjusted according to the judged result.
2. the method as described in claim 1, wherein step（c）Include：
For each cycle：
Determine a maximum and a minimum value in the cycle；And
Determine whether the cycle is influenceed by noise with the minimum value according to the maximum in the cycle.
3. method as claimed in claim 2, wherein determining that the cycle is with the minimum value according to the maximum in the cycle
No the step of being influenceed by noise, includes：
Judge whether the minimum value is more than one the 3rd critical value；
Judge whether the difference between the maximum and the minimum value is less than one the 4th critical value；And
When the minimum value is more than the 3rd critical value, and the difference is less than four critical values, judge the cycle by noise
Influenceed.
4. the method as described in claim 1, wherein second critical value are equal to 1 or 2.
5. a kind of controller for being used for a contact panel, the wherein contact panel include a plurality of sense wire and a plurality of driving
Line, and the sense wire and the drives line are intersected with each other, the controller includes：
One microprocessor；And
One program code, it is stored in a storage device of the controller；
When the microprocessor performs the program code, the program code can perform following step：
（a）Multiple transmission signals are respectively sent to these drives lines of the contact panel in order；
（b）The data in multiple cycles are received, wherein when a transmission signal is enabled and is input to a corresponding drives line,
The data in one cycle are the numerical datas in the multiple reception signals obtained from these sense wires, and the data in the plurality of cycle
Form a frame data of the contact panel；
（c）Judge how many is influenceed in cycle by noise；
（d）It is to determine the frame data by the way that whether a number in the cycle for judging to be influenceed by noise is more than one first critical value
It is no to be influenceed by noise, wherein when the number in the cycle influenceed by noise is more than first critical value, judge the frame number
According to by influence of noise；
（e）Repeat step（a）~（d）Whether it is more than one with a number of the continuous frame data affected by noise for determining to be judged
Second critical value, and produce a judged result；And
（f）A frequency of the transmission signal is adjusted according to the judged result.
6. controller as claimed in claim 5, wherein step（c）Include：
For each cycle：
Determine a maximum and a minimum value in the cycle；And
Determine whether the cycle is influenceed by noise with the minimum value according to the maximum in the cycle.
7. controller as claimed in claim 6, wherein determining the cycle with the minimum value according to the maximum in the cycle
The step of whether being influenceed by noise, includes：
Judge whether the minimum value is more than one the 3rd critical value；
Judge whether the difference between the maximum and the minimum value is less than one the 4th critical value；And
When the minimum value is more than the 3rd critical value, and the difference is less than four critical values, judge the cycle by noise
Influenceed.
8. controller as claimed in claim 5, wherein second critical value are equal to 1 or 2.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310375845.4A CN104423734B (en) | 2013-08-26 | 2013-08-26 | For detecting noise for touch panel and performing the method and controller of signal control |
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| CN201310375845.4A CN104423734B (en) | 2013-08-26 | 2013-08-26 | For detecting noise for touch panel and performing the method and controller of signal control |
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| CN104423734B true CN104423734B (en) | 2018-01-02 |
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| TWI636388B (en) * | 2017-07-25 | 2018-09-21 | 友達光電股份有限公司 | Method and detect circuit for selecting touch detection time |
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| CN102662540A (en) * | 2012-03-23 | 2012-09-12 | 旭曜科技股份有限公司 | Driving frequency selection method for capacitive multipoint touch system |
| CN102722285A (en) * | 2012-06-08 | 2012-10-10 | 深圳市汇顶科技有限公司 | Method and system for eliminating deformation noise in detection data of touch detection device |
| CN103197810A (en) * | 2012-01-10 | 2013-07-10 | 义隆电子股份有限公司 | Touch Panel Scanning Method |
| CN105045426A (en) * | 2015-08-13 | 2015-11-11 | 北京集创北方科技有限公司 | Anti-noise method and device of touch screen |
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- 2013-08-26 CN CN201310375845.4A patent/CN104423734B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197810A (en) * | 2012-01-10 | 2013-07-10 | 义隆电子股份有限公司 | Touch Panel Scanning Method |
| CN102662540A (en) * | 2012-03-23 | 2012-09-12 | 旭曜科技股份有限公司 | Driving frequency selection method for capacitive multipoint touch system |
| CN102722285A (en) * | 2012-06-08 | 2012-10-10 | 深圳市汇顶科技有限公司 | Method and system for eliminating deformation noise in detection data of touch detection device |
| CN105045426A (en) * | 2015-08-13 | 2015-11-11 | 北京集创北方科技有限公司 | Anti-noise method and device of touch screen |
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