CN109725754A - A kind of method and device reducing touch screen interference - Google Patents
A kind of method and device reducing touch screen interference Download PDFInfo
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Abstract
The application discloses a kind of method and device of reduction touch screen interference, this method comprises: terminal device obtains the detection signal that touch sensor detects touch screen；The terminal device determines the signal-to-noise ratio of the detection signal according to the detection signal；If the signal-to-noise ratio of the terminal device detection signal is lower than the first preset threshold, it is determined that the frequency range of noise signal in the detection signal；The terminal device selects first frequency out of the detection signal predeterminated frequency, and detects the touch screen according to the detection signal of the first frequency；The first frequency is the frequency except the frequency range of the noise signal, and within the scope of the predeterminated frequency of the detection signal.
Description
Technical field
This application involves the communications field more particularly to a kind of method and devices for reducing touch screen interference.
Background technique
Existing capacitive touch screen, using capacitance coupling effect with detecting touch position.When finger touch capacitor type touches
When controlling the surface of screen, the capacitance of corresponding position can accordingly change, thus be able to detect the touch position of finger.Touch screen is set
It is standby may interference in one day by many different noise sources, both comprising internal noise or include external noise.Charger
It is two kinds of most common problem noise sources with display noise.In the presence of noise, the position of capacitance touch may
Distortion, to influence accuracy and reliability.With the continuous development of touch screen, make portable electronic product (such as smart phone,
Intelligent players, e-book, PDA, flat board mobile phone etc.) gradually develop to lighter, thinner direction.Due to the face shaping of equipment
It is more frivolous, cause the thickness for covering lens more frivolous, and then generate more parasitic capacitances, cause bigger noise, cause to touch
Touch the touch accuracy decline of screen.
Therefore, how to reduce the interference of touch screen is current urgent problem to be solved.
Summary of the invention
The embodiment of the present application provides a kind of method and device of reduction touch screen interference, touches precision to solve touch screen
Decline problem.
The embodiment of the present application provides a kind of method of reduction touch screen interference, which comprises
Terminal device obtains the detection signal that touch sensor detects touch screen；
The terminal device determines the signal-to-noise ratio of the detection signal according to the detection signal；
If the signal-to-noise ratio of the terminal device detection signal is lower than the first preset threshold, it is determined that the detection signal
The frequency range of middle noise signal；
The terminal device selects first frequency out of the detection signal predeterminated frequency, and according to described first
The detection signal of frequency detects the touch screen；The first frequency be except the frequency range of the noise signal, and
Frequency within the scope of the predeterminated frequency of the detection signal.
A kind of possible implementation, the terminal device select first out of the detection signal predeterminated frequency
After frequency, the method also includes:
The terminal device determines that the signal-to-noise ratio of the detection signal of the first frequency less than the second preset threshold, then selects
Second frequency, the second frequency be except the frequency range of the noise signal, and be located at the detection signal it is pre-
If the frequency in frequency range；Second preset threshold is greater than or equal to first preset threshold；
The terminal device is if it is determined that the signal-to-noise ratio of the detection signal of the second frequency is then returned less than the second preset threshold
The step of returning selection second frequency, otherwise detects the touch screen according to the detection signal of the second frequency.
A kind of possible implementation, the terminal device select second frequency, comprising: the terminal device is according to frequency hopping
Mode select the second frequency.
A kind of possible implementation, the terminal device select first out of the detection signal predeterminated frequency
Frequency, comprising:
The terminal device obtains the frequency of the picture signal currently shown；
The terminal device is by frequency corresponding with the frequency of the picture signal currently shown, as first frequency
Rate；The corresponding relationship of the frequency of the picture signal currently shown and the frequency of the detection signal is preset.
The embodiment of the present application provides a kind of method of reduction touch screen interference, which comprises
The terminal device obtains the frequency of the picture signal currently shown；
The terminal device is by frequency corresponding with the frequency of the picture signal currently shown, as third frequency,
And the touch screen is detected according to the detection signal of the third frequency；The frequency of the picture signal currently shown with it is described
The corresponding relationship of the frequency of detection signal is preset.
The embodiment of the present application provides a kind of device of reduction touch screen interference, and described device includes:
Receiving unit, the detection signal that touch screen is detected for obtaining touch sensor；
Processing unit, for determining the signal-to-noise ratio of the detection signal according to the detection signal；If the terminal device
The signal-to-noise ratio of the detection signal is lower than the first preset threshold, it is determined that the frequency range of noise signal in the detection signal；
The terminal device selects first frequency, and detecing according to the first frequency out of the detection signal predeterminated frequency
Survey touch screen described in signal detection；The first frequency is and to be located at described except the frequency range of the noise signal
Frequency within the scope of the predeterminated frequency of detection signal.
A kind of possible implementation, the processing unit are used for:
Determine that the signal-to-noise ratio of the detection signal of the first frequency less than the second preset threshold, then selects second frequency, institute
State second frequency be except the frequency range of the noise signal, and be located at the detection signal predeterminated frequency within the scope of
Frequency；Second preset threshold is greater than or equal to first preset threshold；If it is determined that the detecting of the second frequency is believed
Number signal-to-noise ratio less than the second preset threshold, then the step of returning to selection second frequency, otherwise detecing according to the second frequency
Survey touch screen described in signal detection.
A kind of possible implementation, the processing unit, for selecting the second frequency in the way of frequency hopping.
A kind of possible implementation, the receiving unit are also used to:
Obtain the frequency of the picture signal currently shown；
The processing unit, for by frequency corresponding with the frequency of the picture signal currently shown, as described
First frequency；The corresponding relationship of the frequency of the picture signal currently shown and the frequency of the detection signal is preset.
The embodiment of the present application provides a kind of device of reduction touch screen interference, and described device includes:
Receiving unit, for obtaining the frequency of the picture signal currently shown；
Processing unit, for by frequency corresponding with the frequency of the picture signal currently shown, as third frequency,
And the touch screen is detected according to the detection signal of the third frequency；The frequency of the picture signal currently shown with it is described
The corresponding relationship of the frequency of detection signal is preset.
The embodiment of the present application obtains the detection signal that touch sensor detects touch screen by terminal device；The terminal
Equipment determines the signal-to-noise ratio of the detection signal according to the detection signal；If the letter of the terminal device detection signal
It makes an uproar than lower than the first preset threshold, it is determined that the frequency range of noise signal in the detection signal；The terminal device is from institute
Selection first frequency within the scope of the predeterminated frequency of detection signal is stated, and the touching is detected according to the detection signal of the first frequency
Screen is touched, so that the signal-to-noise ratio of the detection signal of the touch screen reaches preset threshold, therefore touch screen can be effectively reduced and mentioned
High touch screen improves the performance of terminal device to the anti-interference ability of different noises, promotes user experience.
Detailed description of the invention
Fig. 1 is a kind of method flow schematic diagram for reducing touch screen interference provided by the embodiments of the present application；
Fig. 2 is a kind of method flow schematic diagram for reducing touch screen interference provided by the embodiments of the present application；
Fig. 3 is a kind of schematic device for reducing touch screen interference provided by the embodiments of the present application；
Fig. 4 is a kind of schematic device for reducing touch screen interference provided by the embodiments of the present application.
Specific embodiment
Scheme provided by the embodiments of the present application is suitable for the terminal device using touch screen, which, which can be, has
The handheld device of touch screen, wearable device, calculates equipment or is connected to other processing of radio modem mobile unit
Equipment and various forms of user equipmenies (User Equipment, abbreviation UE), and mobile station (Mobile station, referred to as
MS), terminal (terminal), terminal device (Terminal Equipment) etc..For convenience of description, in the application, referred to as
For terminal.
And to realize the touch control operation to terminal, the usual terminal device will also have display function, therefore in general
The terminal will also have display screen.It should be noted that touch screen and display screen here can be independent two screens, the two
It can be combined by foam glue frame patch or the full laminating type of optical cement (Optically Clear Adhesive, OCA) etc..When
So, it can also be and be integrated with touch function in display screen, that is to say, that touch screen and display screen can be integrated into one and both have
Touch function shields for one having a display function again, can be described as touch display screen.Above-mentioned display screen can be liquid crystal display,
It is also possible to Organic Light Emitting Diode (Organic Light-Emitting Diode, OLED) display screen etc., in the present embodiment
In the type of display screen is not limited.
Capacitive touch screen (Capactive Touch Panel, CTP), because it has response is quick, user experience is good etc.
Feature, oneself is widely used in the smart electronics product such as mobile phone, tablet computer.However, carrying out touch-control to these electronic products
During operation, capacitive touch screen often shows exception because being interfered, and can generate interference to touch screen and do
The source of disturbing may be a kind of, be also likely to be a variety of.
Touch panel device may interference in one day by many different noise sources, both comprising internal noise or included
External noise.Charger and display noise are two kinds of most common problem noise sources.In addition, many other daily objects also can
Noise is generated, causes to interfere, such as radio signal, AC power source or even fluorescent lamp ballast.In the presence of noise,
The touch location determined in the detection signal of capacitive touch screen detecting may be distorted, and show exception so as to cause the operation of TP,
To influence accuracy and reliability.Maloperation mainly includes larger shake (for example, the touch coordinate of non-moving finger report becomes
It is dynamic very big), without finger contact screen but accidentally detecting there is finger to touch, finger touch screen when do not detect presence less than finger but,
And it is completely locked etc. even to will cause equipment.If can not report the manipulation of finger by taking touch-screen mobile phone as an example, it means that
Mobile phone can not be unlocked, or dial a wrong number Deng maloperations are led to due to shake or false touch.With the increasing of noise
Add, position report of the finger on panel may malfunction, and user is caused to cause significant impact to the quality of experience of touch interface.
As the face shaping of equipment is to more frivolous trend development, the thickness for covering lens is reduced, and touch apparatus needs
Handle the bigger noise of more frivolous covering lens bring.Touch panel device more and more thinner at present, especially touch-screen mobile phone
The noise of generation mainly faces following problems: first is that increasing from the noise that display screen is coupled to sensor；Second is that sensor is posted
Raw capacitor improves.
The noise that display screen generates is very big to the influence that performance generates is touched, because it is close apart from touch sensor.With
Equipment thin down, air gap and shielded layer are all cancelled, and touch sensor is connected directly to display using OCA
Screen.This results in the receiving electrode of touch sensor VCOM layers higher closer to noise, and capacitor is caused to increase, and couples more
Noise.The development trend of frivolous terminal device is exactly that some or all of touch sensor requires to be integrated in display screen,
For example, embedded touch, external hanging type touch-control etc..Such display screen is integrated to allow the receiving electrode of touch sensor closer aobvious
Display screen, to couple more noises.
The Second Problem of shape more thin-client equipment is exactly that the parasitic capacitance of touch sensor increases.It is whole to realize
Screen becomes thinner, and ito substrate layer (being made of glass or PET) needs more and more thinner.This just shortens touch sensor driving
The distance between receiving electrode, to increase parasitic capacitance.The raising of parasitic capacitance further causes the increase of noise.
In addition, in terminal device, when display screen include multiple pixels and each pixel include switch unit (such as:
Metal-oxide-semiconductor) conducting with shutdown when, which can also generate noise signal, if the frequency of the noise signal and touch screen detecting
The frequency of detection signal is close or is overlapped, which just influences whether the capacitance signal that touch screen induction channel reception arrives
Variable quantity, to be interfered to touch screen.If display screen and touch screen are the screen that an integrated touch display function is integrated
(touch display screen) then realizes that the part of display function can be done to realizing that the part of touch function generates in the touch display screen
It disturbs.To reduce interference of the noise to touch screen in terminal device, the embodiment of the present application provides a kind of reduction touch screen interference
Method, comprising:
Step 101: terminal device obtains the detection signal that touch sensor detects touch screen；
Step 102: the terminal device determines the signal-to-noise ratio of the detection signal according to the detection signal；
Step 103: the terminal device is if it is determined that the signal-to-noise ratio of the detection signal is lower than the first preset threshold, it is determined that
The frequency range of noise signal in the detection signal；
Step 104: the terminal device selects first frequency out of the detection signal predeterminated frequency, and according to
The detection signal of the first frequency detects the touch screen.
In a step 101, the touch sensor can be the touch sensor to the detection signal that touch screen is detected
The electric signal that detects of receiving electrode, the scanning of the driving electrodes of the frequency of the detection signal and the touch sensor believes
Number frequency be in multiple proportion.The frequency separation of the detection signal of touch screen is model locating for the frequency of the detection signal of touch screen
It encloses, namely value in the range can be used as the frequency of the detection signal of touch screen.In general, the detection signal of touch screen
Frequency separation can be rule of thumb and set, if too small may result in of the frequency of detection signal misses some touches
Point, or cannot accurately judge touch operation, if the excessive hardware that may result in terminal device of the frequency of detection signal is difficult to
It supports, so the frequency of the detection signal of touch screen needs in a suitable section.
In a step 102, the judgment method of the signal-to-noise ratio of the detection signal is to obtain before and after touching screen according to finger
Signal ratio determine.In the absence of noise, when finger touch causes the parasitic capacitance on touch screen to become
When change, the amplitude of detection signal can change, and phase is held essentially constant；At this point, the signal-to-noise ratio of the detection signal is very
It is high.And there are in the case where noise, the detection signal before touch is just superimposed with noise signal, leads to the amplitude and phase of detection signal
Changes will occur for position；In the detection signal obtained after touch, there are the variations of the amplitude of noise signal to detect with caused by touch
The amplitude variation of signal is surveyed, the detection signal after touch is difficult to identify that detecting letter caused by being noise signal at this time or touching
Number variation, to cause the inaccuracy of touch detection, signal-to-noise ratio at this time is very low.By the noise for detecting the detection signal
Than, it can be determined that influence of the noise signal to detection signal.The preset threshold can be determined according to practical application scene.
In step 103, according to the frequency of the detection signal determine the noise signal there are many mode, the noise
Signal can obtain the noise signal by way of using filtering to the detection signal.Specifically, available described
The amplitude-frequency relationship of noise signal obtains the frequency of the noise signal by being analyzed and processed to the noise signal
Obtain the frequency of the noise signal.
At step 104, the terminal device selects first frequency out of the detection signal predeterminated frequency, and
The touch screen is detected according to the detection signal of the first frequency；The first frequency is the frequency positioned at the noise signal
Except range, and the frequency being located within the scope of the predeterminated frequency of the detection signal.
In the specific implementation process, the mode for choosing the frequency of the first detection signal can be realized by the way of frequency hopping.
Specifically, frequency multiplication comparison is carried out according to the predeterminated frequency section of the scan frequency of touch screen and detection signal, according to comparing result
Frequency hopping processing is carried out to the frequency of the detection signal of touch screen, for example, if the frequency of the frequency of detection signal and the noise signal
Relatively, interference is more for rate, then needs frequency hopping amplitude larger；And if the frequency of the frequency of detection signal and the noise signal
Distant, interference is smaller, then the frequency hopping amplitude needed is smaller, slight to adjust.
The mode for choosing the frequency of the first detection signal can also be realized using other modes, be located at for example, can choose
Except frequency range where the noise signal, and it is located in the frequency range of the preset detection signal of the touch sensor
Centre frequency as the first frequency, it is not limited here.
In this way, the range for noise targetedly handles the frequency of detection signal, effectively mention
It is high when noise constantly changes, the anti-interference ability of touch screen meets the requirement that terminal device needs high s/n ratio.
In the embodiment of the present application, a kind of possible implementation, default frequency of the terminal device from the detection signal
Within the scope of rate select first frequency after, the method can with the following steps are included:
Step 1: the terminal device determines the signal-to-noise ratio of the detection signal of the first frequency less than the second default threshold
Value, then select second frequency, and the second frequency is and to be located at the detecting except the frequency range of the noise signal
Frequency within the scope of the predeterminated frequency of signal；
Step 2: the terminal device if it is determined that the signal-to-noise ratio of the detection signal of the second frequency less than the second default threshold
Value, then return step one, otherwise detects the touch screen according to the detection signal of the second frequency.
Wherein, second preset threshold can be greater than or equal to first preset threshold；The above method may be implemented
When image dynamic change, in the state that touch screen can maintain high s/n ratio, suitable for touching the high application of precision prescribed
Scene.
In step 103, a kind of possible implementation, in the case where interference source includes the display screen of terminal device,
The terminal device selects first frequency out of the detection signal predeterminated frequency, comprising:
Step 1: the terminal device obtains the frequency of the picture signal currently shown；
Step 2: the terminal device is by frequency corresponding with the frequency of the picture signal currently shown, as institute
State first frequency；The corresponding relationship of the frequency of the frequency and detection signal of the picture signal currently shown is default
's.
In the specific implementation process of step 1, described image signal can be in the figure that show of display screen of terminal device
As signal.The frequency of described image signal can be determined with the brightness value of space pixel at any time according to described image.
For example, if described image is the dot matrix picture for being displayed in full screen monochrome pixels interval, the brightness value of described image signal
On each pixel be it is constant, the frequency of described image signal is lower value at this time.If image is real-time change at this time
Video image, the brightness value of described image signal may be in variation in each pixel at this time, and therefore, described image is believed
Number frequency be high value.
In a kind of possible implementation of step 2, the frequency of described image signal can drive for the display screen
What chip determined, after the frequency of described image signal determines, the display screen drive chip is by the frequency of described image signal
It is sent to the control chip of the touch sensor, the chip that controls is according to the frequency and detection signal of preset picture signal
Frequency corresponding relationship, determine the frequency of the corresponding detection signal of the frequency of described image signal.
The corresponding relationship of the frequency of the frequency and detection signal of the preset picture signal, can based on experience value really
It is fixed, it can also be according to the system of the frequency for the noise signal that the frequency for the different images signal that user obtains in actual use generates
Meter is as a result, select except the frequency range where the noise signal, and be located at the preset detecting of the touch sensor
The corresponding relationship of optimum value in the frequency range of signal, the frequency of the frequency and detection signal of the preset picture signal can
Think one or more corresponding relationships, can be selected according to actual needs, it is not limited here.
In this way, the frequency for adjusting the detection signal when the noise of touch screen is relatively low may be implemented, to obtain
Obtain the detecting precision of preferable touch screen.When the display image dynamic change of display screen, may be implemented touch screen maintain compared with
In the state of high s/n ratio, and the frequency for adjusting detection signal in real time by the control chip of touch sensor is not needed, subtracted
The processing time for having lacked control chip saves the resource of control chip.
The embodiment of the present application provides a kind of method of reduction touch screen interference, comprising:
Step 201: the terminal device obtains the frequency of the picture signal currently shown；
Step 202: the terminal device is by frequency corresponding with the frequency of the picture signal currently shown, as institute
State third frequency；The corresponding relationship of the frequency of the frequency and detection signal of the picture signal currently shown is default
's.
In step 201, the mode for obtaining picture signal can be what the display screen drive chip determined, when the figure
After determining as the frequency of signal, the frequency of described image signal is sent to the touch sensor by the display screen drive chip
Control chip, the control chip is according to the corresponding relationship of the frequency of preset picture signal and the frequency of detection signal, really
Determine the frequency of the corresponding detection signal of frequency of described image signal.
In the specific implementation process, the corresponding relationship of the frequency of the frequency and detection signal of the preset picture signal,
It can be determined by the noise signal generated when test or using terminal equipment.
For example, can be when testing the noise signal of terminal device, by showing preset different images, test is being touched
The signal-to-noise ratio of the frequency for the detection signal that sensor receives.By adjusting the frequency of the detection signal, higher noise is obtained
The frequency of described image signal and the frequency of the detection signal compared with high s/n ratio are determined as by the frequency of the detection signal of ratio
Corresponding relationship.
In the specific implementation process, the acquisition modes of described image can be the calibration test by installing on terminal device
Software is realized, for example, can will recall the image to match with screen resolution automatically for calibration test software；Or
User's pre-stored picture in terminal device.
Optionally, before determining the frequency of noise of described image generation, can make to be displayed in full screen black and white on display screen
The dot matrix picture of pixel, and/or the backlight of terminal device is adjusted to it is most bright, under this interface, caused by display screen interference source
Noise signal is most strong, and the noise tested at this time is more advantageous to accurate analysis, to help to obtain, signal-to-noise ratio is higher detects
Survey the frequency of signal.
Through the foregoing embodiment, the signal-to-noise ratio in the detection signal for not needing monitoring current touch sensor may be implemented,
The good of noise for generating different images can be realized to evade, greatly reduce the control of the touch sensor to realize
The operand of coremaking piece timely eliminates influence of the noise caused by different displays to performance is touched.Touch screen is touched
When the interference that is subject to of detection signal and scanning signal it is smaller, therefore, solve the problems, such as that noise interferes touch screen, protect
The accuracy for having demonstrate,proved user's touch operation improves the use feeling of user.
It can also include: by practical detecting letter in order to realize the frequency of automatic setting detection signal, in the present embodiment
Number set of frequency to terminal device be used for store touch screen detection signal frequency memory space in, the terminal device packet
Include the touch screen.
If the frequency of identified first detection signal is the frequency of practical detection signal, by the practical detection signal
Set of frequency is to the memory space (the generally flash memory of terminal device) for storing touch screen scan frequency.When in embodiment
When executing subject is independently of other electronic equipments of terminal device or hardware module or functional module in electronic equipment, in electricity
After the frequency of practical detection signal for obtaining touch screen in sub- equipment, it can be arranged in such a way that data are transmitted to terminal device
Flash memory in.Scheme provided in an embodiment of the present invention can be terminal device or hardware module or function mould in terminal device
Root tuber according to detection signal set of frequency flash memory, it is not necessary to other electronic equipments are reused, so that whole flow process is more convenient.
As shown in figure 3, the embodiment of the present application provides a kind of device of reduction touch screen interference, described device includes:
Receiving unit 301, the detection signal that touch screen is detected for obtaining touch sensor；
Processing unit 302, for determining the signal-to-noise ratio of the detection signal according to the detection signal；The terminal is set
If the signal-to-noise ratio of the standby detection signal is lower than the first preset threshold, it is determined that the frequency model of noise signal in the detection signal
It encloses；The terminal device selects first frequency out of the detection signal predeterminated frequency, and according to the first frequency
Detection signal detect the touch screen；The first frequency is and to be located at except the frequency range of the noise signal
Frequency within the scope of the predeterminated frequency of the detection signal.
A kind of possible implementation, processing unit 302 are used for:
Determine that the signal-to-noise ratio of the detection signal of the first frequency less than the second preset threshold, then selects second frequency, institute
State second frequency be except the frequency range of the noise signal, and be located at the detection signal predeterminated frequency within the scope of
Frequency；Second preset threshold is greater than or equal to first preset threshold；If it is determined that the detecting of the second frequency is believed
Number signal-to-noise ratio less than the second preset threshold, then the step of returning to selection second frequency, otherwise detecing according to the second frequency
Survey touch screen described in signal detection.
A kind of possible implementation, processing unit 302, for selecting the second frequency in the way of frequency hopping.
A kind of possible implementation, receiving unit 301 are also used to:
Obtain the frequency of the picture signal currently shown；
Processing unit 302, for by frequency corresponding with the frequency of the picture signal currently shown, as described
One frequency；The corresponding relationship of the frequency of the picture signal currently shown and the frequency of the detection signal is preset.
As shown in figure 4, the embodiment of the present application provides a kind of device of reduction touch screen interference, described device includes:
Receiving unit 401, for obtaining the frequency of the picture signal currently shown；
Processing unit 402, for by frequency corresponding with the frequency of the picture signal currently shown, as third frequency
Rate, and the touch screen is detected according to the detection signal of the third frequency；The frequency of the picture signal currently shown with
The corresponding relationship of the frequency of the detection signal is preset.
The detecting that touch screen is detected is believed in conclusion the embodiment of the present application obtains touch sensor by terminal device
Number；The terminal device determines the signal-to-noise ratio of the detection signal according to the detection signal；It is detectd if the terminal device is described
The signal-to-noise ratio for surveying signal is lower than the first preset threshold, it is determined that the frequency range of noise signal in the detection signal；The end
End equipment selects first frequency out of the detection signal predeterminated frequency, and according to the detection signal of the first frequency
The touch screen is detected, so that the signal-to-noise ratio of the detection signal of the touch screen reaches preset threshold, therefore can effectively be dropped
Low touch screen improves touch screen to the anti-interference ability of different noises, improves the performance of terminal device, promotes user experience.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although the preferred embodiment of the application has been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the application range.
Obviously, those skilled in the art can carry out various modification and variations without departing from the essence of the application to the application
Mind and range.In this way, if these modifications and variations of the application belong to the range of the claim of this application and its equivalent technologies
Within, then the application is also intended to include these modifications and variations.
Claims (10)
1. a kind of method for reducing touch screen interference, which is characterized in that the described method includes:
Terminal device obtains the detection signal that touch sensor detects touch screen；
The terminal device determines the signal-to-noise ratio of the detection signal according to the detection signal；
If the signal-to-noise ratio of the terminal device detection signal is lower than the first preset threshold, it is determined that make an uproar in the detection signal
The frequency range of acoustical signal；
The terminal device selects first frequency out of the detection signal predeterminated frequency, and according to the first frequency
Detection signal detect the touch screen；The first frequency is and to be located at except the frequency range of the noise signal
Frequency within the scope of the predeterminated frequency of the detection signal.
2. the method as described in claim 1, which is characterized in that predeterminated frequency model of the terminal device from the detection signal
After enclosing interior selection first frequency, the method also includes:
The terminal device determines that the signal-to-noise ratio of the detection signal of the first frequency less than the second preset threshold, then selects second
Frequency, the second frequency be except the frequency range of the noise signal, and be located at the detection signal default frequency
Frequency within the scope of rate；Second preset threshold is greater than or equal to first preset threshold；
The terminal device is if it is determined that the signal-to-noise ratio of the detection signal of the second frequency then returns to choosing less than the second preset threshold
Otherwise the step of selecting second frequency detects the touch screen according to the detection signal of the second frequency.
3. the method as described in claim 1, which is characterized in that the terminal device selects second frequency, comprising:
The terminal device selects the second frequency in the way of frequency hopping.
4. the method as described in claim 1, which is characterized in that predeterminated frequency model of the terminal device from the detection signal
Enclose interior selection first frequency, comprising:
The terminal device obtains the frequency of the picture signal currently shown；
The terminal device is by frequency corresponding with the frequency of the picture signal currently shown, as the first frequency；
The corresponding relationship of the frequency of the picture signal currently shown and the frequency of the detection signal is preset.
5. a kind of method for reducing touch screen interference, which is characterized in that the described method includes:
The terminal device obtains the frequency of the picture signal currently shown；
The terminal device is by frequency corresponding with the frequency of the picture signal currently shown, as third frequency, and root
The touch screen is detected according to the detection signal of the third frequency；The frequency and the detecting of the picture signal currently shown
The corresponding relationship of the frequency of signal is preset.
6. a kind of device for reducing touch screen interference, which is characterized in that described device includes:
Receiving unit, the detection signal that touch screen is detected for obtaining touch sensor；
Processing unit, for determining the signal-to-noise ratio of the detection signal according to the detection signal；If the terminal device is described
The signal-to-noise ratio of detection signal is lower than the first preset threshold, it is determined that the frequency range of noise signal in the detection signal；It is described
Terminal device selects first frequency out of the detection signal predeterminated frequency, and is believed according to the detecting of the first frequency
Number detecting touch screen；The first frequency be except the frequency range of the noise signal, and be located at the detecting
Frequency within the scope of the predeterminated frequency of signal.
7. device as claimed in claim 6, which is characterized in that the processing unit is used for:
The signal-to-noise ratio of the detection signal of the first frequency is determined less than the second preset threshold, then selects second frequency, described
Two frequencies are the frequency except the frequency range of the noise signal, and within the scope of the predeterminated frequency of the detection signal
Rate；Second preset threshold is greater than or equal to first preset threshold；If it is determined that the detection signal of the second frequency
Signal-to-noise ratio then returns to the step of selecting second frequency less than the second preset threshold, is otherwise believed according to the detecting of the second frequency
Number detecting touch screen.
8. device as claimed in claim 6, which is characterized in that the processing unit, for selecting institute in the way of frequency hopping
State second frequency.
9. device as claimed in claim 6, which is characterized in that the receiving unit is also used to:
Obtain the frequency of the picture signal currently shown；
The processing unit, for by frequency corresponding with the frequency of the picture signal currently shown, as described first
Frequency；The corresponding relationship of the frequency of the picture signal currently shown and the frequency of the detection signal is preset.
10. a kind of device for reducing touch screen interference, which is characterized in that described device includes:
Receiving unit, for obtaining the frequency of the picture signal currently shown；
Processing unit, for by frequency corresponding with the frequency of the picture signal currently shown, as third frequency, and root
The touch screen is detected according to the detection signal of the third frequency；The frequency and the detecting of the picture signal currently shown
The corresponding relationship of the frequency of signal is preset.
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| US20130293511A1 (en) * | 2012-05-07 | 2013-11-07 | Melfas, Inc. | Touch sensor chip, touch sensing apparatus including the same, and method of controlling noise of touch panel |
| CN103425363A (en) * | 2012-05-18 | 2013-12-04 | 禾瑞亚科技股份有限公司 | Method and device for detecting capacitive touch screen |
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