CN103123549B - Touch-screen system and the synchronous method detected thereof - Google Patents

Touch-screen system and the synchronous method detected thereof Download PDF

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Publication number
CN103123549B
CN103123549B CN201210312396.4A CN201210312396A CN103123549B CN 103123549 B CN103123549 B CN 103123549B CN 201210312396 A CN201210312396 A CN 201210312396A CN 103123549 B CN103123549 B CN 103123549B
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Prior art keywords
touch
screen
signal
chip
detected
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CN103123549A (en
Inventor
钟华
邓耿淳
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Shenzhen Goodix Technology Co Ltd
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Shenzhen Huiding Technology Co Ltd
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Priority to CN201210312396.4A priority Critical patent/CN103123549B/en
Publication of CN103123549A publication Critical patent/CN103123549A/en
Priority to PCT/CN2013/079489 priority patent/WO2014032485A1/en
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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
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving

Abstract

A kind of touch-screen system, comprise touch-screen and touch chip, touch-screen comprises first communication module, for detected signal is sent to touch chip; Touch chip and comprise memory module, for prestoring the frequency of the drive singal of touch-screen; Second communication module, for timing, and then receives the detected signal touching chip in detection time; Quadrature demodulation unit, carries out quadrature demodulation for the frequency according to drive singal to detected signal, obtains signal to be detected; Judge module, for judging whether the amplitude of signal to be detected is more than or equal to the first predetermined threshold value, wherein memory module is also for being recorded as driving time section when the amplitude of signal to be detected is more than or equal to the first predetermined threshold value by this detection time, synchronously completes.Inventive touch chip carries out quadrature demodulation or FFT change to detected signal and obtains the displaying time of touch-screen and driving time or displaying time and free time, to realize touching the synchronous of chip and touch-screen.

Description

Touch-screen system and the synchronous method detected thereof
Technical field
The present invention relates to touch-screen field, particularly relate to a kind of touch-screen system and the synchronous method detected thereof.
Background technology
As shown in Figure 1, TFT-LCD (hereinafter referred to as LCD) comprises white light source, polaroid, tft array (TFT Array) substrate, liquid crystal, colored filter etc.When LCD carries out image display, first choose the row that will show by gate line (Gate line), then by source electrode line (Sourceline), electric signal corresponding for the image that will show is outputted on this row, so just complete the display of a line.After the same method, the image on every other row has been shown, LCD completes a display update also referred to as completing a frame scan.
Current electronic product such as smart mobile phone is general all using LCD as human-computer interaction interface, and the use of capacitance touch screen, make this more convenient alternately undoubtedly, more hommization.Common capacitive touch screen generally comprises and drives layer and inductive layer, and centre separates with glass or film, and two-layer cabling is mutually vertical.Current a kind of popular way is the inside driving layer of capacitance touch screen and inductive layer being made into LCD, namely between tft array substrate and colored filter.Implementation utilizes the signal of LCD self as a drive singal output terminal for touch-screen, by increasing an inductive layer as touch screen signal receiving end, sees Fig. 2.As long as increase an inductive layer due to extra, relative to two-layer capacitance touch screen, it can simplify the procedure for producing of touch-screen, raises the efficiency and reduces costs.But because drive singal and induced signal belong to different systems, the former belongs to LCD, and the latter belongs to touch chip, is separate, both need to carry out synchronously in sequential, to realize drive singal demodulation accurately.
As shown in Figure 3, the second way drive layer and inductive layer all together with do into LCD inside, this mode can reduce the thickness of whole system (LCD+ touch-screen), is conducive to electronic product to ultra-thin future development.Under this kind of mode, for reducing the impact normally shown LCD touch Scanning Detction, have employed the method for Time share scanning equally.Therefore, also need the time judging that LCD has scanned, namely need synchronous.
Summary of the invention
In view of this, be necessary to provide a kind of new touch system and the synchronous method detected thereof, realization touch chip is synchronous with touch-screen.
Touch-screen system provided by the invention, in electronic equipment, comprising: comprise touch-screen and touch chip, wherein, described touch-screen comprises: first communication module, for detected signal is sent to described touch chip; Described touch chip comprises: memory module, for prestoring the frequency of the drive singal of touch-screen; Second communication module, for timing, and then receives the detected signal of described touch chip in detection time; Quadrature demodulation unit, carries out quadrature demodulation for the frequency according to described drive singal to described detected signal, obtains signal to be detected; Judge module, for judging whether the amplitude of described signal to be detected is more than or equal to the first predetermined threshold value, wherein said memory module also for this detection time being recorded as driving time section when the amplitude of described signal to be detected is more than or equal to described first predetermined threshold value, synchronously completes.
Another touch-screen system provided by the invention, in electronic equipment, comprise touch-screen and touch chip, wherein, described touch-screen comprises: first communication module, for detected signal is sent to described touch chip; Described touch chip comprises: memory module, for prestoring the frequency range of the display of touch-screen; Second communication module, for timing, and then receives the detected signal of described touch chip in detection time; Quadrature demodulation unit, for carrying out quadrature demodulation according to the frequency range one of described display detected signal described in a pair, obtains whole signal to be detected; Judge module, for judging whether the amplitude of described whole signal to be detected has at least one to be more than or equal to the second predetermined threshold value, wherein said memory module also for this detection time being recorded as driving time section when the amplitude of described whole signal to be detected is all more than or equal to the second predetermined threshold value, synchronously completes.
The touch-screen system that the present invention also provides, in electronic equipment, comprise touch-screen and touch chip, wherein, described touch-screen comprises: first communication module, for detected signal is sent to described touch chip; Described touch chip comprises: memory module, for prestoring the spectrum signature of the drive singal of touch-screen; Second communication module, for timing, and then receives the detected signal of described touch chip in detection time; FFT processing module, for carrying out FFT process to described detected signal, to obtain the spectrum signature of described detected signal; Judge module, whether consistent with the spectrum signature of described drive singal for judging the spectrum signature of described detected signal, wherein said memory module also for this detection time being recorded as driving time section when the spectrum signature of described detected signal is consistent with the spectrum signature of described drive singal, synchronously completes.
The present invention also provides another touch-screen system, in electronic equipment, comprises touch-screen and touches chip, wherein: described touch-screen comprises: first communication module, for detected signal is sent to described touch chip; Described touch chip comprises: memory module, for prestoring the spectrum signature of the display of touch-screen; Second communication module, for timing, and then receives the detected signal of described touch chip in detection time; FFT processing module, for carrying out FFT process to described detected signal, to obtain the spectrum signature of described detected signal; Judge module, whether consistent with the spectrum signature of described display for judging the spectrum signature of described detected signal, wherein said memory module also for the spectrum signature of described detected signal and the spectrum signature of described display inconsistent time this detection time is recorded as driving time section, synchronously complete.
The touch-screen system that the present invention also provides, in electronic equipment, comprise touch-screen and touch chip, wherein, described touch-screen comprises: first communication module, for detected signal is sent to described touch chip; Described touch chip comprises: memory module, for prestoring the frequency range of the display of touch-screen; Second communication module, for timing, and then receives the detected signal of described touch chip in detection time; Quadrature demodulation unit, for carrying out quadrature demodulation according to the frequency range one of described display detected signal described in a pair, obtains whole signal to be detected; Judge module, for judging whether the amplitude of described whole signal to be detected is all less than the 3rd predetermined threshold value, wherein said memory module also for this detection time being recorded as free time section when the amplitude of described whole signal to be detected is all less than the 3rd predetermined threshold value, synchronously completes.
Another touch-screen system provided by the invention, in electronic equipment, comprises touch-screen and touches chip, wherein: described touch-screen comprises: first communication module, for detected signal is sent to described touch chip; Described touch chip comprises: memory module, for prestoring the frequency of the signal of the free time of touch-screen; Second communication module, for timing, and then receives the detected signal of described touch chip in detection time; Quadrature demodulation unit, the frequency range 1 detected signal described in a pair for the signal of the free time according to described touch-screen carries out quadrature demodulation, obtains whole signal to be detected; Judge module, for judging whether the amplitude of described whole signal to be detected is all less than the 4th predetermined threshold value, wherein said memory module also for this detection time being recorded as free time section when the amplitude of described signal to be detected is all less than described 4th predetermined threshold value, synchronously completes.
The touch-screen system that the present invention also provides, in electronic equipment, comprise touch-screen and touch chip, wherein, described touch-screen comprises: first communication module, for detected signal is sent to described touch chip; Described touch chip comprises: memory module, for prestoring the spectrum signature of the display of touch-screen; Second communication module, for timing, and then receives the detected signal of described touch chip in detection time; FFT processing module, for carrying out FFT process to described detected signal, to obtain the spectrum signature of described detected signal; Judge module, whether consistent with the spectrum signature of described display for judging the spectrum signature of described detected signal, wherein said memory module also for the spectrum signature of described detected signal and the spectrum signature of described display inconsistent time this detection time is recorded as free time section, synchronously complete.
The another kind of touch-screen system that the present invention also provides, in electronic equipment, comprises touch-screen and touches chip, wherein: described touch-screen comprises: first communication module, for detected signal is sent to described touch chip; Described touch chip comprises: memory module, for prestoring the spectrum signature of the signal of the free time of touch-screen; Second communication module, for timing, and then receives the detected signal of described touch chip in detection time; FFT processing module, for carrying out FFT process to described detected signal, to obtain the spectrum signature of described detected signal; Judge module, whether consistent with the spectrum signature of the signal of the free time of described touch-screen for judging the spectrum signature of described detected signal, wherein said memory module also for this detection time being recorded as free time section when the spectrum signature of described detected signal is consistent with the spectrum signature of described display, synchronously completes.
The method that touch-screen system provided by the invention synchronously detects, in electronic equipment, wherein, touch-screen is connected with touch chip, touch the frequency prestoring drive singal in chip, said method comprising the steps of: the timing of described touch chip, and judge whether detection time; If to detection time, touch chip and received detected signal; Described touch chip utilizes the frequency of described drive singal to carry out quadrature demodulation to detected signal and obtains signal to be detected; Described touch chip judges whether the amplitude of described signal to be detected is more than or equal to the first predetermined threshold value; If so, then described touch chip record this detection time is driving time section, synchronously completes.
The method that another touch-screen system provided by the invention synchronously detects, for in electronic equipment, wherein, touch-screen is connected with touch chip, touch the frequency range prestoring display in chip, said method comprising the steps of: the timing of described touch chip, and judge whether detection time; If to detection time, touch chip and received detected signal; Described touch chip utilizes frequency range 1 a pair detected signal of described display to carry out quadrature demodulation and obtains whole signal to be detected; Described touch chip judges whether the amplitude of described whole signal to be detected has at least one to be more than or equal to the second predetermined threshold value; If not then described touch chip record this detection time is driving time section, synchronously completes.
The method that another touch-screen system provided by the invention synchronously detects, for in electronic equipment, wherein, touch-screen is connected with touch chip, touch the spectrum signature prestoring drive singal in chip, said method comprising the steps of: the timing of described touch chip, and judge whether detection time; If to detection time, touch chip and received detected signal; Described touch chip carries out FFT process to detected signal, to obtain the spectrum signature of detected signal; Described touch chip judges that whether the spectrum signature of described detected signal is consistent with the spectrum signature of drive singal; If so, then described touch chip record this detection time is driving time section, synchronously completes.
The method that touch-screen system synchronously detects, in electronic equipment, wherein, touch-screen is connected with touch chip, touch the spectrum signature prestoring display in chip, said method comprising the steps of: the timing of described touch chip, and judge whether detection time; If to detection time, touch chip and received detected signal; Described touch chip carries out FFT process to detected signal, to obtain the spectrum signature of detected signal; Described touch chip judges that whether the spectrum signature of described detected signal is consistent with the spectrum signature of described display; If not then described touch chip record this detection time is driving time section, synchronously completes.
The method that the touch-screen system that the present invention also provides synchronously detects, for in electronic equipment, the method that touch-screen system synchronously detects, wherein, touch-screen is connected with touch chip, touch the frequency range prestoring display in chip, said method comprising the steps of: the timing of described touch chip, and judge whether detection time; If to detection time, touch chip and received detected signal; Described touch chip utilizes frequency range 1 a pair detected signal of described display to carry out quadrature demodulation and obtains whole signal to be detected; Described touch chip judges whether the amplitude of described whole signal to be detected is all less than the 3rd predetermined threshold value; If be all less than described 3rd predetermined threshold value, then described touch chip record this detection time is free time section, synchronously completes.
The method that another touch-screen system provided by the invention synchronously detects, for in electronic equipment, wherein, touch-screen is connected with touch chip, touch the frequency range prestoring the signal of the free time of described touch-screen in chip, said method comprising the steps of: the timing of described touch chip, and judge whether detection time; If to detection time, touch chip and received detected signal; Described touch chip utilizes frequency range 1 a pair detected signal of the signal of the free time of described touch-screen to carry out quadrature demodulation and obtains whole signal to be detected; Described touch chip judges whether the amplitude of described whole signal to be detected is all less than the 4th predetermined threshold value; If be all less than described 4th predetermined threshold value, then described touch chip record this detection time is free time section, synchronously completes.
The method that the touch-screen system that the present invention also provides synchronously detects, for in electronic equipment, wherein, touch-screen is connected with touch chip, touch the spectrum signature prestoring display in chip, said method comprising the steps of: the timing of described touch chip, and judge whether detection time; If to detection time, touch chip and received detected signal; Described touch chip carries out FFT process to detected signal, to obtain the spectrum signature of detected signal; Described touch chip judges that whether the spectrum signature of described detected signal is consistent with the spectrum signature of described display; If not then described touch chip record this detection time is free time section, synchronously completes.
The method that another touch-screen system that the present invention also provides synchronously detects, for in electronic equipment, wherein, touch-screen is connected with touch chip, touch the spectrum signature prestoring the signal of the free time of described touch-screen in chip, said method comprising the steps of: the timing of described touch chip, and judge whether detection time; If to detection time, touch chip and received detected signal; Described touch chip carries out FFT process to detected signal, to obtain the spectrum signature of detected signal; Described touch chip judges that whether the spectrum signature of described detected signal is consistent with the spectrum signature of the signal of the free time of described touch-screen; If so, then described touch chip record this detection time is free time section, synchronously completes.
Touch-screen system in embodiment of the present invention and the synchronous method detected thereof are carried out quadrature demodulation or FFT change to detected signal obtain the displaying time of touch-screen and driving time or displaying time and free time by being touched chip, to realize touching the synchronous of chip and touch-screen.
Accompanying drawing explanation
Fig. 1 is LCD structure schematic diagram in prior art;
Fig. 2 is the structural representation that in prior art, LCD increases inductive layer;
Fig. 3 is that in prior art, LCD increases the structural representation driving layer and inductive layer;
Fig. 4 is the touch-screen system block diagram comprising the touch-screen shown in Fig. 2 in an embodiment of the present invention;
Fig. 5 is the touch-screen system block diagram comprising the touch-screen shown in Fig. 2 in another embodiment of the present invention;
Fig. 6 is the touch-screen system block diagram comprising the touch-screen shown in Fig. 3 in an embodiment of the present invention;
Fig. 7 is the touch-screen system block diagram comprising the touch-screen shown in Fig. 3 in another embodiment of the present invention;
Fig. 8 A comprises the method flow diagram of the synchronous detection of the touch-screen system of touch-screen shown in Fig. 2 for an embodiment of the present invention;
Fig. 8 B comprises the method flow diagram of the synchronous detection of the touch-screen system of touch-screen shown in Fig. 2 for another embodiment of the present invention;
Fig. 9 A comprises the method flow diagram of the synchronous detection of the touch-screen system of touch-screen shown in Fig. 2 for another embodiment of the present invention;
Fig. 9 B comprises the method flow diagram of the synchronous detection of the touch-screen system of touch-screen shown in Fig. 2 for another embodiment of the present invention;
Figure 10 A comprises the method flow diagram of the synchronous detection of the touch-screen system of touch-screen shown in Fig. 3 for an embodiment of the present invention;
Figure 10 B comprises the method flow diagram of the synchronous detection of the touch-screen system of touch-screen shown in Fig. 3 for another embodiment of the present invention;
Figure 11 A comprises the method flow diagram of the synchronous detection of the touch-screen system of touch-screen shown in Fig. 3 for another embodiment of the present invention;
Figure 11 B comprises the method flow diagram of the synchronous detection of the touch-screen system of touch-screen shown in Fig. 3 for another embodiment of the present invention;
Figure 12 is timeslice and the detection signal strength relation schematic diagram of Fig. 4 in an embodiment of the present invention;
Figure 13 is timeslice and the detection signal strength relation schematic diagram of Fig. 6 in another embodiment of the present invention.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
In describing the invention, term " interior ", " outward ", " longitudinal direction ", " transverse direction ", " on ", D score, " top ", the orientation of the instruction such as " end " or position relationship be based on orientation shown in the drawings or position relationship, be only the present invention for convenience of description instead of require that the present invention with specific azimuth configuration and operation, therefore must can not be interpreted as limitation of the present invention.
Refer to Fig. 4, Figure 4 shows that the touch-screen system comprising the touch-screen 20 shown in Fig. 2 in an embodiment of the present invention.In the present embodiment, touch-screen 20 communicates to connect, in electronic equipment (not shown) with touch chip 10.In the present embodiment, electronic equipment can be: mobile phone, computer notebook, Ipad etc. need to touch the equipment with Presentation Function.
Touch-screen 20 comprises: first communication module, touches chip 10 for being sent to by detected signal.
Touch chip comprises: memory module, for prestoring the frequency of the drive singal of touch-screen 20.In the present embodiment, the frequency of the drive singal of touch-screen 20 is stored in advance in and touches in chip.
Second communication module, for timing, and then receives the detected signal touching chip 10 in detection time.In the present embodiment, touch chip 10 and start to detect every 200 ~ 400us, until synchronously complete with touch-screen 20.
Quadrature demodulation unit, carries out quadrature demodulation for the frequency according to described drive singal to detected signal, obtains signal to be detected.
Judge module, for judging whether the amplitude of signal to be detected is more than or equal to the first predetermined threshold value, wherein memory module is also for being recorded as driving time section when the amplitude of signal to be detected is more than or equal to the first predetermined threshold value by this detection time, synchronously completes.
In the present embodiment, the first predetermined threshold value is the value obtained according to measurement during practical application.
In the present embodiment, memory module is also for being recorded as displaying time section when the amplitude of signal to be detected is all less than the first predetermined threshold value by this detection time.
In the present embodiment, touch-screen also comprises driver module, for generation of drive singal, wherein, second communication module after synchronously completing by matrix data that signal to be detected is converted to, and judge whether touch-screen 20 has touch action according to matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
In other embodiments of the present invention, memory module, for prestoring the frequency range of the display of touch-screen 20.
Quadrature demodulation unit, carries out quadrature demodulation for the frequency range 1 a pair detected signal according to display, obtains whole signal to be detected.
Judge module, for judging whether the amplitude of whole signal to be detected has at least one to be more than or equal to the second predetermined threshold value, when wherein memory module is also for having at least in the amplitude of whole signal to be detected one to be more than or equal to the second predetermined threshold value, this detection time being recorded as displaying time section, synchronously completing.
In the present embodiment, the second predetermined threshold value is the value obtained according to measurement during practical application.
In the present embodiment, memory module is also for being recorded as driving time section when the amplitude of whole signal to be detected is all less than the second predetermined threshold value by this detection time.
In the present embodiment, touch-screen also comprises driver module, for generation of drive singal, wherein, second communication module after synchronously completing by matrix data that detected signal is converted to, and judge whether touch-screen 20 has touch action according to matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
In the present embodiment, memory module is also for prestoring the frequency of drive singal, and second communication module obtains matrix data after carrying out quadrature demodulation and analog to digital conversion to detected signal according to the frequency of drive singal.
Refer to Fig. 5, Figure 5 shows that the touch-screen system comprising the touch-screen 20 shown in Fig. 2 in an embodiment of the present invention.In the present embodiment, touch-screen 20 communicates to connect, in electronic equipment (not shown) with touch chip 10.In the present embodiment, electronic equipment can be: mobile phone, computer notebook, Ipad etc. need to touch the equipment with Presentation Function.
Touch-screen 20 comprises first communication module, touches chip 10 for being sent to by detected signal.
Touch chip 10 to comprise: memory module, for prestoring the spectrum signature of the drive singal of touch-screen 20.
Second communication module, for timing, and then receives the detected signal touching chip 20 in detection time.
FFT (i.e. Fast Fourier Transform (FFT)) processing module, for carrying out FFT process to detected signal, to obtain the spectrum signature of detected signal.
Judge module, whether consistent with the spectrum signature of drive singal for judging the spectrum signature of detected signal, wherein memory module also for the spectrum signature of detected signal and the spectrum signature of drive singal consistent time this detection time is recorded as driving time section, synchronously complete.
In the present embodiment, memory module also for the spectrum signature of detected signal and the spectrum signature of drive singal inconsistent time this detection time is recorded as displaying time section.
In the present embodiment, touch-screen also comprises driver module, for generation of drive singal, wherein, detected signal is converted to matrix data by second communication module after synchronously completing, and judge whether touch-screen 20 has touch action according to matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
In another embodiment of the present invention, memory module, for prestoring the spectrum signature of the display of touch-screen 20.
Judge module, whether consistent with the spectrum signature of display for judging the spectrum signature of detected signal, wherein memory module also for the spectrum signature of detected signal and the spectrum signature of display inconsistent time this detection time is recorded as driving time section, synchronously complete.
In the present embodiment, memory module also for the spectrum signature of detected signal and the spectrum signature of display consistent time this detection time is recorded as displaying time section.
In the present embodiment, touch-screen also comprises driver module, for generation of drive singal, wherein, detected signal is converted to matrix data by second communication module after synchronously completing, and judge whether touch-screen 20 has touch action according to matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
In the present embodiment, memory module is also for prestoring the frequency of drive singal, and second communication module obtains matrix data after carrying out quadrature demodulation and analog to digital conversion to detected signal according to the frequency of drive singal.
Refer to Fig. 6, Figure 6 shows that the touch-screen 20 comprised shown in Fig. 3 in an embodiment of the present invention " touch-screen system.In the present embodiment, touch-screen 20 ' communicates to connect, in electronic equipment (not shown) with touch chip 10 '.In the present embodiment, electronic equipment can be: mobile phone, computer notebook, Ipad etc. need to touch the equipment with Presentation Function.
Touch-screen 20 ' comprising: first communication module, for detected signal is sent to touch chip.
Touch chip 10 ' to comprise: memory module, for prestoring the frequency range of the display of touch-screen 20 '.
Second communication module, for timing, and then receives the detected signal touching chip 10 ' in detection time.
Quadrature demodulation unit, carries out quadrature demodulation for the frequency range 1 a pair detected signal according to display, obtains whole signal to be detected.
Judge module, for judging whether the amplitude of whole signal to be detected is all less than the 3rd predetermined threshold value, wherein memory module is also for being recorded as free time section when the amplitude of whole signal to be detected is all less than the 3rd predetermined threshold value by this detection time, synchronously completes.In the present embodiment, the 3rd predetermined threshold value is the value obtained according to measurement during practical application.
In the present embodiment, when memory module is also for having at least one to be more than or equal to the 3rd predetermined threshold value in the amplitude of whole signal to be detected, this detection time is recorded as displaying time section.
In the present embodiment, touch chip 10 ' and also comprise driver module, for producing drive singal after synchronously completing, wherein, second communication module obtains the sampled signal of touch-screen 20 ' by drive singal, and sampled signal is converted to matrix data, judge whether touch-screen 20 ' has touch action according to matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
In other embodiments of the present invention, memory module, for prestoring the frequency of the signal of the free time of touch-screen 20 '.
Quadrature demodulation unit, the frequency range 1 a pair detected signal for the signal of the free time according to touch-screen 20 ' carries out quadrature demodulation, obtains whole signal to be detected.
Judge module, for judging whether the amplitude of whole signal to be detected is all less than the 4th predetermined threshold value, wherein memory module is also for being recorded as free time section when the amplitude of whole signal to be detected is all less than the 4th predetermined threshold value by this detection time, synchronously completes.In the present embodiment, the 4th predetermined threshold value is the value obtained according to measurement during practical application.
In the present embodiment, when memory module is also for having at least one to be more than or equal to the 4th predetermined threshold value in the amplitude of whole signal to be detected, this detection time is recorded as displaying time section.
In the present embodiment, touch chip 10 ' and also comprise driver module, for producing drive singal after synchronously completing, wherein, second communication module obtains the sampled signal of touch-screen 20 ' by drive singal, and sampled signal is converted to matrix data, judge whether touch-screen 20 ' has touch action according to matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
In the present embodiment, memory module is also for prestoring the frequency of drive singal, and second communication module obtains matrix data after carrying out quadrature demodulation and analog to digital conversion to detected signal according to the frequency of drive singal.
Refer to Fig. 7, Figure 7 shows that the touch-screen system comprising the touch-screen 20 ' shown in Fig. 3 in an embodiment of the present invention.In the present embodiment, touch-screen 20 ' communicates to connect, in electronic equipment (not shown) with touch chip 10 '.In the present embodiment, electronic equipment can be: mobile phone, computer notebook, Ipad etc. need to touch the equipment with Presentation Function.
Touch-screen 20 ' comprising: first communication module, touches chip 10 ' for being sent to by detected signal.
Touch chip 10 ' to comprise: memory module, for prestoring the spectrum signature of the display of touch-screen.
Second communication module, for timing, and then receives the detected signal touching chip 20 ' in detection time.
FFT processing module, for carrying out FFT process to detected signal, to obtain the spectrum signature of detected signal.
Judge module, whether consistent with the spectrum signature of display for judging the spectrum signature of signal to be detected, wherein memory module also for the spectrum signature of detected signal and the spectrum signature of display inconsistent time this detection time is recorded as free time section, synchronously complete.
In the present embodiment, memory module also for the spectrum signature of detected signal and the spectrum signature of display consistent time this detection time is recorded as displaying time section.
In the present embodiment, touch chip 10 ' and also comprise driver module, for producing drive singal after synchronously completing, wherein, second communication module obtains the sampled signal of touch-screen 20 ' by drive singal, and sampled signal is converted to matrix data, judge whether touch-screen 20 ' has touch action according to matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
In other embodiments of the present invention, memory module, for prestoring the spectrum signature of the signal of the free time of touch-screen.
Second communication module, for timing, and then receives the detected signal touching chip 20 ' in detection time.
FFT processing module, for carrying out FFT process to detected signal, to obtain the spectrum signature of detected signal.
Judge module, whether consistent with the spectrum signature of the signal of the free time of touch-screen 20 ' for judging the spectrum signature of signal to be detected, wherein memory module is also for being recorded as free time section when the spectrum signature of detected signal is consistent with the spectrum signature of the signal of the free time of touch-screen 20 ' by this detection time, synchronously completes.
In the present embodiment, memory module is also for being recorded as displaying time section when the spectrum signature of the spectrum signature of detected signal and the signal of the free time of touch-screen 20 ' is inconsistent by this detection time.
In the present embodiment, touch chip 10 ' and also comprise driver module, for producing drive singal after synchronously completing, wherein, second communication module obtains the sampled signal of touch-screen 20 ' by drive singal, and sampled signal is converted to matrix data, judge whether touch-screen 20 ' has touch action according to matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
Refer to Fig. 8 A, Fig. 8 A is depicted as the method that an embodiment of the present invention comprises the synchronous detection of the touch-screen system of touch-screen 20 shown in Fig. 2.In the present embodiment, the method that touch-screen system synchronously detects is in electronic equipment, and wherein, touch-screen 20 is connected with touch chip 10, touches the frequency prestoring drive singal in chip 10.
In the present embodiment, because the touch-screen 20 shown in Fig. 2 is without driving layer, therefore drive singal is produced by the driver module of touch-screen 20.
In step S100, touch chip 10 and open timing;
In step S102, touch chip 10 and judge that whether the time of timing is to detection time.In the present embodiment, detection time is 200 ~ 400us.
The time of timing to detection time time, then in step S104, touch-screen 20 sends detected signal to touching chip.
In step S106, touch chip 10 and receive detected signal.
In step S108, touch chip 10, according to the frequency of drive singal, quadrature demodulation is carried out to obtain signal to be detected to detected signal.
In step S110, touch chip 10 and judge whether the amplitude of signal to be detected is more than or equal to the first predetermined threshold value.In the present embodiment, the first predetermined threshold value is the value obtained according to measurement during practical application.
If amplitude is more than or equal to the first predetermined threshold value, then in step S112, touching chip record detection time is driving time section, synchronously completes.
In step S114, touch chip 10 and signal to be detected is converted to matrix data.
In step S116, touch chip 10 and judge whether touch-screen 20 has touch action according to matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
If the amplitude of signal to be detected is all less than the first predetermined threshold value, then in step S118, touching chip record detection time is displaying time section.
In other embodiments of the present invention, it is the frequency range of display if prestore in touch chip 10, refer to Fig. 8 B, at S108, touch chip 10 and carry out quadrature demodulation to obtain whole signal to be detected according to frequency range 1 a pair detected signal of display.
In step S110, touch chip 10 and judge whether the amplitude of whole signal to be detected has at least one to be more than or equal to the second predetermined threshold value.In the present embodiment, the second predetermined threshold value is the value obtained according to measurement during practical application.
If amplitude is all less than the second predetermined threshold value, then in step S112, touching chip record detection time is driving time section, synchronously completes.
In step S114, touch chip 10 and detected signal is converted to matrix data.
In step S116, touch chip 10 and judge whether touch-screen 20 has touch action according to matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
If the amplitude of whole signal to be detected has at least one to be more than or equal to the second predetermined threshold value, then in step S118, touching chip record detection time is displaying time section.
Refer to Fig. 9 A, Fig. 9 A is depicted as the method that another embodiment of the present invention comprises the synchronous detection of the touch-screen system of touch-screen 20 shown in Fig. 2.In the present embodiment, the method that touch-screen system synchronously detects is in electronic equipment, and wherein, touch-screen 20 is connected with touch chip 10, touches the spectrum signature prestoring drive singal in chip 10.
Touch chip 10 in step S200 and open timing.
In step S202, touch chip 10 and judge whether detection time.
If to detection time, then in step S204, touch-screen 20 sends detected signal to touch-screen 10.
In step S206, touch chip 10 and receive detected signal.
In step S208, touch chip 10 and FFT process is carried out to detected signal, to obtain the spectrum signature of detected signal.
In step S210, touch chip 10 and judge that whether the spectrum signature of detected signal is consistent with the spectrum signature of drive singal.
If so, represent that detected signal is drive singal, then in step S212, it is driving time section that touch chip 10 records this detection time, synchronously completes.
In step S214, touch chip 10 and detected signal is converted to matrix data.
In step S216, touch chip 10 and judge whether touch-screen 20 has touch action according to matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
If touch chip to judge that the spectrum signature of detected signal is inconsistent with the spectrum signature of drive singal, detected signal is display, then in step S218, it is displaying time section that touch chip 10 records this detection time.
In other embodiments of the present invention, if touch the spectrum signature prestoring display in chip 10, refer to Fig. 9 B, in step S210, touch chip 10 and judge that whether the spectrum signature of detected signal is consistent with the spectrum signature of display.
If inconsistent, represent that detected signal is drive singal, then in step S212, it is driving time section that touch chip 10 records this detection time, synchronously completes.
In step S214, touch chip 10 and detected signal is converted to matrix data.
In step S216, touch chip 10 and judge whether touch-screen 20 has touch action according to matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
If touch chip to judge that the spectrum signature of detected signal is consistent with the spectrum signature of drive singal, detected signal is display, then in step S218, it is displaying time section that touch chip 10 records this detection time.
Refer to Figure 10 A, Figure 10 A is depicted as the method that an embodiment of the present invention comprises the synchronous detection of the touch-screen system of touch-screen 20 ' shown in Fig. 3.
In the present embodiment, the method that touch-screen system synchronously detects is in electronic equipment, and wherein, touch-screen 20 ' is connected with touch chip 10 ', and touch the frequency range prestoring display in chip 10 ', method comprises the following steps:
In step S300, touch chip 10 ' and open timing.
In step S302, touch chip 10 ' and judge whether detection time.
If to detection time, then in step S304, touch-screen 20 ' sends detected signal to touching chip 10 '.
In step S306, touch chip 10 ' and receive detected signal.
In step S308, touch chip 10 ' utilizes frequency range 1 a pair detected signal of display to carry out quadrature demodulation and obtains whole signal to be detected.
In step S310, touch chip 10 ' and judge whether the amplitude of whole signal to be detected is all less than the 3rd predetermined threshold value.
If be all less than the 3rd predetermined threshold value, then in step S312, it is free time section that touch chip 10 ' records this detection time, synchronously completes.
In step S314, touch chip 10 ' output drive signal to touch-screen 20 '.
In step S316, touch-screen 20 ' receives drive singal, and obtains sampled signal according to drive singal.
In step S318, touch chip 10 ' and sampled signal is converted to matrix data, and judge whether touch-screen 20 ' has touch action according to matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
If the amplitude of whole signal to be detected has at least one to be more than or equal to the 3rd predetermined threshold value, then in step S320, it is displaying time section that touch chip 10 ' records this detection time.
In other embodiments of the present invention, if touch the frequency prestoring the signal of the free time of touch-screen 20 ' in chip 10 ', then refer to Figure 10 B, in step S308, touch chip 10 ' utilizes frequency range 1 a pair detected signal of the signal of the free time of touch-screen 20 ' to carry out quadrature demodulation and obtains whole signal to be detected.
In step S310, touch chip 10 ' and judge whether the amplitude of signal to be detected is all less than the 4th predetermined threshold value.
If be all less than the 4th predetermined threshold value, then in step S312, it is free time section that touch chip 10 ' records this detection time, synchronously completes.
In step S314, touch chip 10 ' output drive signal to touch-screen 20 '.
In step S316, touch-screen 20 ' receives drive singal, and obtains sampled signal according to drive singal.
In step S318, touch chip 10 ' and sampled signal is converted to matrix data, and judge whether touch-screen 20 ' has touch action according to matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
If the amplitude of whole signal to be detected has at least one to be more than or equal to the 4th predetermined threshold value, then in step S320, it is displaying time section that touch chip 10 ' records this detection time.
Refer to Figure 11 A, Figure 11 A is depicted as the method that another embodiment of the present invention comprises the synchronous detection of the touch-screen system of touch-screen 20 ' shown in Fig. 3.
In the present embodiment, the method that touch-screen system synchronously detects is in electronic equipment, and wherein, touch-screen 20 ' is connected with touch chip 10 ', and touch the spectrum signature prestoring display in chip 10 ', method comprises the following steps:
In step S400, touch chip 10 ' and open timing.
In step S402, touch chip 10 ' and judge whether detection time.
If to detection time, touched chip and receive detected signal, then in step S404, touch-screen 20 ' sends detection signal and refers to touch chip 10 '.
In step S406, touch chip 10 ' and receive detection signal.
In step S408, touch chip 10 ' and FFT process is carried out to detected signal, to obtain the spectrum signature of detected signal.
In step S410, touch chip 10 ' and judge that whether the spectrum signature of detected signal is consistent with the spectrum signature of display.
If inconsistent, then in step S412, then touching chip record this detection time is free time section, synchronously completes.
In step S414, touch chip 10 ' output drive signal to touch-screen 20 '.
In step S416, touch-screen 20 ' receives drive singal, and obtains sampled signal according to drive singal.
In step S418, touch chip 10 ' and receive sampled signal, and judge to touch on chip 10 ' whether have touch action according to matrix data, and corresponding touch action is reported to electronic equipment.
If the spectrum signature of detected signal is consistent with the spectrum signature of display, then in step S420, it is displaying time section that touch chip 10 ' records this detection time.
In other embodiments of the present invention, if touch the spectrum signature prestoring the signal of the free time of touch-screen 20 ' in chip 10 ', refer to Figure 11 B, in step S410, touch chip 10 ' and judge that whether the detected spectrum signature of signal is consistent with the spectrum signature of the signal of the free time of touch-screen 20 '.
If consistent, then in step S412, then touching chip record this detection time is free time section, synchronously completes.
In step S414, touch chip 10 ' output drive signal to touch-screen 20 '.
In step S416, touch-screen 20 ' receives drive singal, and obtains sampled signal according to drive singal.
In step S418, touch chip 10 ' and receive sampled signal, and judge to touch on chip 10 ' whether have touch action according to matrix data, and corresponding touch action is reported to electronic equipment.
If the spectrum signature of the detected spectrum signature of signal and the signal of the free time of touch-screen 20 ' is inconsistent, then in step S420, it is displaying time section that touch chip 10 ' records this detection time.
Refer to Figure 12, Figure 12 shows that timeslice and the detection signal strength graph of a relation of Fig. 4 in an embodiment of the present invention.
In the present embodiment, refresh touch-screen 20 with 60Hz, the time upgrading frame data is 1000/60=16.67ms, and namely the scan period is 16.67ms.Within a scan period, normal displaying time is 12ms, and touching sweep time (i.e. driving time) is 4.67ms.
Touching chip 10 time-slotting periodically adopts the method for quadrature demodulation to carry out demodulation to detected signal, and frequency is consistent with driving frequency, and in the present embodiment, timeslice is less than 4ms, to ensure the signal that can not miss for driving touch-screen 20.
In normal displaying time, because the frequency of the display of touch-screen 20 is different from the frequency, demodulation frequency (i.e. the frequency of drive singal) touching chip 10, the signal that demodulation obtains is very faint, little Bai block as shown in Figure 12.
In driving time, due to the frequency of detected signal and the frequency of drive singal consistent, the signal obtained after demodulation is the strongest, as Figure 12 bend fritter.
At normal displaying time and driving time intersection, the signal intensity obtained falls between, as grey fritter in Figure 12.
Touch chip and judge whether the amplitude size of the detected signal after by quadrature demodulation is more than or equal to the first predetermined threshold value, if be more than or equal to the first predetermined threshold value, then think that detected signal belongs to and touch scanning, this numerical value can be used to carry out coordinate calculating, if be less than the first predetermined threshold value, then think display.
Refer to Figure 13, Figure 13 shows that timeslice and the detection signal strength graph of a relation of Fig. 6 in an embodiment of the present invention.
In the present embodiment, refresh touch-screen 20 ' with 60Hz, the time upgrading frame data is 1000/60=16.67ms, and namely the scan period is 16.67ms.Within a scan period, normal displaying time is 12ms, and free time is 4.67ms.
Touching chip 10 ' time-slotting periodically adopts the method for quadrature demodulation to carry out demodulation to detected signal, and frequency is arranged in the frequency range of display, and in the present embodiment, timeslice is less than 4ms.
In normal displaying time, because the frequency of the display of touch-screen 20 ' is identical with the frequency touching the display prestored in chip 10 ', the letter that demodulation obtains is well stronger, oblique line fritter as shown in Figure 13.
At one's leisure, because the frequency of detected signal is very large with the frequency difference touching the display prestored in chip 10 ', the signal obtained after demodulation is more weak, white block as medium and small in Figure 13.
Normal displaying time and free time intersection, the signal intensity obtained falls between, as grey fritter in Figure 13.
Touch chip 10 ' and judge whether the amplitude size of the detected signal after by quadrature demodulation is more than or equal to the 3rd predetermined threshold value, if be less than the 3rd predetermined threshold value, then think that touch-screen 20 ' is in free time section at present, no signal exports, this numerical value can be used to carry out coordinate calculating, if be greater than the 3rd predetermined threshold value, then think display.
It should be noted that, in the various embodiments described above, preferably, the frequency of drive singal is greater than the maximal value of the frequency range of display.
Touch-screen system in embodiment of the present invention carries out quadrature demodulation or FFT change to detected signal obtain the displaying time of touch-screen and driving time or displaying time and free time by touching chip, so that realization touch chip is synchronous with touch-screen, effectively raise the rate of precision to touch-screen.
Although the present invention is described with reference to current better embodiment; but those skilled in the art will be understood that; above-mentioned better embodiment is only used for the present invention is described; not be used for limiting protection scope of the present invention; any within the spirit and principles in the present invention scope; any modification of doing, equivalence replacement, improvement etc., all should be included within the scope of the present invention.

Claims (48)

1. a touch-screen system, in electronic equipment, comprises touch-screen and touches chip, it is characterized in that:
Described touch-screen comprises: first communication module, for detected signal is sent to described touch chip;
Described touch chip comprises: memory module, for prestoring the frequency of the drive singal of touch-screen;
Second communication module, for timing, and then receives the detected signal of described touch chip in detection time;
Quadrature demodulation unit, carries out quadrature demodulation for the frequency according to described drive singal to described detected signal, obtains signal to be detected;
Judge module, for judging whether the amplitude of described signal to be detected is more than or equal to the first predetermined threshold value, wherein said memory module also for this detection time being recorded as driving time section when the amplitude of described signal to be detected is more than or equal to described first predetermined threshold value, synchronously completes.
2. touch-screen system as claimed in claim 1, it is characterized in that, described memory module is also for being recorded as displaying time section when the amplitude of described signal to be detected is less than described first predetermined threshold value by this detection time.
3. touch-screen system as claimed in claim 1, it is characterized in that, described touch-screen also comprises driver module, for generation of drive singal, wherein, described signal to be detected is converted to matrix data by described second communication module after synchronously completing, and judges whether described touch-screen has touch action according to described matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
4. a touch-screen system, in electronic equipment, comprises touch-screen and touches chip, it is characterized in that:
Described touch-screen comprises: first communication module, for detected signal is sent to described touch chip;
Described touch chip comprises: memory module, for prestoring the frequency range of the display of touch-screen;
Second communication module, for timing, and then receives the detected signal of described touch chip in detection time;
Quadrature demodulation unit, for carrying out quadrature demodulation according to the frequency range one of described display detected signal described in a pair, obtains whole signal to be detected;
Judge module, for judging whether the amplitude of described whole signal to be detected has at least one to be more than or equal to the second predetermined threshold value, when wherein said memory module is also for having at least one to be more than or equal to described second predetermined threshold value in the amplitude of described whole signal to be detected, this detection time being recorded as displaying time section, synchronously completing.
5. touch-screen system as claimed in claim 4, it is characterized in that, described memory module is also for being recorded as driving time section when the amplitude of described whole signal to be detected is all less than described second predetermined threshold value by this detection time.
6. touch-screen system as claimed in claim 4, it is characterized in that, described touch-screen also comprises driver module, for generation of drive singal, wherein, described detected signal is converted to matrix data by described second communication module after synchronously completing, and judges whether described touch-screen has touch action according to described matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
7. a touch-screen system, in electronic equipment, comprises touch-screen and touches chip, it is characterized in that:
Described touch-screen comprises: first communication module, for detected signal is sent to described touch chip;
Described touch chip comprises: memory module, for prestoring the spectrum signature of the drive singal of touch-screen;
Second communication module, for timing, and then receives the detected signal of described touch chip in detection time;
FFT processing module, for carrying out FFT process to described detected signal, to obtain the spectrum signature of described detected signal;
Judge module, whether consistent with the spectrum signature of described drive singal for judging the spectrum signature of described detected signal, wherein said memory module also for this detection time being recorded as driving time section when the spectrum signature of described detected signal is consistent with the spectrum signature of described drive singal, synchronously completes.
8. touch-screen system as claimed in claim 7, is characterized in that, described memory module also for the spectrum signature of described detected signal and the spectrum signature of described drive singal inconsistent time this detection time is recorded as displaying time section.
9. touch-screen system as claimed in claim 7, it is characterized in that, described touch-screen also comprises driver module, for generation of drive singal, wherein, described detected signal is converted to matrix data by described second communication module after synchronously completing, and judges whether described touch-screen has touch action according to described matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
10. a touch-screen system, in electronic equipment, comprises touch-screen and touches chip, it is characterized in that:
Described touch-screen comprises: first communication module, for detected signal is sent to described touch chip;
Described touch chip comprises: memory module, for prestoring the spectrum signature of the display of touch-screen;
Second communication module, for timing, and then receives the detected signal of described touch chip in detection time;
FFT processing module, for carrying out FFT process to described detected signal, to obtain the spectrum signature of described detected signal;
Judge module, whether consistent with the spectrum signature of described display for judging the spectrum signature of described detected signal, wherein said memory module also for the spectrum signature of described detected signal and the spectrum signature of described display inconsistent time this detection time is recorded as driving time section, synchronously complete.
11. touch-screen systems as claimed in claim 10, is characterized in that, described memory module is also for being recorded as displaying time section when the spectrum signature of described detected signal is consistent with the spectrum signature of described display by this detection time.
12. touch-screen systems as claimed in claim 10, it is characterized in that, described touch-screen also comprises driver module, for generation of drive singal, wherein, described detected signal is converted to matrix data by described second communication module after synchronously completing, and judges whether described touch-screen has touch action according to described matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
13. 1 kinds of touch-screen systems, in electronic equipment, comprise touch-screen and touch chip, it is characterized in that:
Described touch-screen comprises: first communication module, for detected signal is sent to described touch chip;
Described touch chip comprises: memory module, for prestoring the frequency range of the display of touch-screen;
Second communication module, for timing, and then receives the detected signal of described touch chip in detection time;
Quadrature demodulation unit, for carrying out quadrature demodulation according to the frequency range one of described display detected signal described in a pair, obtains whole signal to be detected;
Judge module, for judging whether the amplitude of described whole signal to be detected is all less than the 3rd predetermined threshold value, wherein said memory module also for this detection time being recorded as free time section when the amplitude of whole described signal to be detected is all less than described 3rd predetermined threshold value, synchronously completes.
14. touch-screen systems as claimed in claim 13, is characterized in that, when described memory module is also for having at least one to be more than or equal to described 3rd predetermined threshold value in the amplitude of described whole signal to be detected, this detection time are recorded as displaying time section.
15. touch-screen systems as claimed in claim 13, it is characterized in that, described touch chip also comprises driver module, for producing drive singal after synchronously completing, wherein, described second communication module obtains the sampled signal of described touch-screen by drive singal, and described sampled signal is converted to matrix data, judge whether described touch-screen has touch action according to described matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
16. 1 kinds of touch-screen systems, in electronic equipment, comprise touch-screen and touch chip, it is characterized in that:
Described touch-screen comprises: first communication module, for detected signal is sent to described touch chip;
Described touch chip comprises: memory module, for prestoring the frequency range of the signal of the free time of touch-screen;
Second communication module, for timing, and then receives the detected signal of described touch chip in detection time;
Quadrature demodulation unit, the frequency range 1 detected signal described in a pair for the signal of the free time according to described touch-screen carries out quadrature demodulation, obtains whole signal to be detected;
Judge module, for judging whether the amplitude of described whole signal to be detected is all less than the 4th predetermined threshold value, wherein said memory module also for this detection time being recorded as free time section when the amplitude of described whole signal to be detected is all less than described 4th predetermined threshold value, synchronously completes.
17. touch-screen systems as claimed in claim 16, is characterized in that, when described memory module is also for having at least one to be more than or equal to described 4th predetermined threshold value in the amplitude of described whole signal to be detected, this detection time are recorded as displaying time section.
18. touch-screen systems as claimed in claim 16, it is characterized in that, described touch chip also comprises driver module, for producing drive singal after synchronously completing, wherein, described second communication module obtains the sampled signal of described touch-screen by drive singal, and described sampled signal is converted to matrix data, judge whether described touch-screen has touch action according to described matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
19. 1 kinds of touch-screen systems, in electronic equipment, comprise touch-screen and touch chip, it is characterized in that:
Described touch-screen comprises: first communication module, for detected signal is sent to described touch chip;
Described touch chip comprises: memory module, for prestoring the spectrum signature of the display of touch-screen;
Second communication module, for timing, and then receives the detected signal of described touch chip in detection time;
FFT processing module, for carrying out FFT process to described detected signal, to obtain the spectrum signature of described detected signal;
Judge module, whether consistent with the spectrum signature of described display for judging the spectrum signature of described detected signal, wherein said memory module also for the spectrum signature of described detected signal and the spectrum signature of described display inconsistent time this detection time is recorded as free time section, synchronously complete.
20. touch-screen systems as claimed in claim 19, is characterized in that, described memory module is also for being recorded as displaying time section when the spectrum signature of described detected signal is consistent with the spectrum signature of described display by this detection time.
21. touch-screen systems as claimed in claim 19, it is characterized in that, described touch chip also comprises driver module, for producing drive singal after synchronously completing, wherein, described second communication module obtains the sampled signal of described touch-screen by drive singal, and described sampled signal is converted to matrix data, judge whether described touch-screen has touch action according to described matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
22. 1 kinds of touch-screen systems, in electronic equipment, comprise touch-screen and touch chip, it is characterized in that:
Described touch-screen comprises: first communication module, for detected signal is sent to described touch chip;
Described touch chip comprises: memory module, for prestoring the spectrum signature of the signal of the free time of touch-screen;
Second communication module, for timing, and then receives the detected signal of described touch chip in detection time;
FFT processing module, for carrying out FFT process to described detected signal, to obtain the spectrum signature of described detected signal;
Judge module, whether consistent with the spectrum signature of the signal of the free time of described touch-screen for judging the spectrum signature of described detected signal, wherein said memory module also for this detection time being recorded as free time section when the spectrum signature of described detected signal is consistent with the spectrum signature of the signal of described free time, synchronously completes.
23. touch-screen systems as claimed in claim 22, is characterized in that, described memory module also for the spectrum signature of described detected signal and the spectrum signature of described drive singal inconsistent time this detection time is recorded as displaying time section.
24. touch-screen systems as claimed in claim 22, it is characterized in that, described touch chip also comprises driver module, for producing drive singal after synchronously completing, wherein, described second communication module obtains the sampled signal of described touch-screen by drive singal, and described sampled signal is converted to matrix data, judge whether described touch-screen has touch action according to described matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
The method that 25. 1 kinds of touch-screen systems synchronously detect, in electronic equipment, wherein, touch-screen is connected with touch chip, it is characterized in that, touches the frequency prestoring drive singal in chip, said method comprising the steps of:
The timing of described touch chip, and judge whether detection time;
If to detection time, touch chip and received detected signal;
Described touch chip utilizes the frequency of described drive singal to carry out quadrature demodulation to detected signal and obtains signal to be detected;
Described touch chip judges whether the amplitude of described signal to be detected is more than or equal to the first predetermined threshold value;
If so, then described touch chip record this detection time is driving time section, synchronously completes.
26. methods as claimed in claim 25, is characterized in that, if described touch chip judges that the amplitude of described signal to be detected is less than described first predetermined threshold value, then described touch chip record this detection time is displaying time section.
27. methods as claimed in claim 25, it is characterized in that, after synchronously completing, described signal to be detected is converted to matrix data, and judges whether described touch-screen has touch action according to described matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
The method that 28. 1 kinds of touch-screen systems synchronously detect, in electronic equipment, wherein, touch-screen is connected with touch chip, it is characterized in that, touches the frequency range prestoring display in chip, said method comprising the steps of:
The timing of described touch chip, and judge whether detection time;
If to detection time, touch chip and received detected signal;
Described touch chip utilizes frequency range 1 a pair detected signal of described display to carry out quadrature demodulation and obtains whole signal to be detected;
Described touch chip judges whether the amplitude of described whole signal to be detected has at least one to be more than or equal to the second predetermined threshold value;
If this detection time is recorded as displaying time section when having at least one to be more than or equal to described second predetermined threshold value by the amplitude of described whole signal to be detected, synchronously complete.
29. methods as claimed in claim 28, is characterized in that, if this detection time is recorded as driving time section when described touch chip judges that the amplitude of described whole signal to be detected is all less than described second predetermined threshold value.
30. methods as claimed in claim 28, it is characterized in that, also comprise: after synchronously completing, described detected signal is converted to matrix data, and judge whether described touch-screen has touch action according to described matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
The method that 31. 1 kinds of touch-screen systems synchronously detect, in electronic equipment, wherein, touch-screen is connected with touch chip, it is characterized in that, touches the spectrum signature prestoring drive singal in chip, said method comprising the steps of:
The timing of described touch chip, and judge whether detection time;
If to detection time, touch chip and received detected signal;
Described touch chip carries out FFT process to detected signal, to obtain the spectrum signature of detected signal;
Described touch chip judges that whether the spectrum signature of described detected signal is consistent with the spectrum signature of drive singal;
If so, then described touch chip record this detection time is driving time section, synchronously completes.
32. methods as claimed in claim 31, is characterized in that, if described touch chip judges that the spectrum signature of the spectrum signature of described detected signal and drive singal is inconsistent, then described touch chip record this detection time is displaying time section.
33. methods as claimed in claim 31, it is characterized in that, also comprise: after synchronously completing, wherein described detected signal is converted to matrix data, and judge whether described touch-screen has touch action according to described matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
The method that 34. 1 kinds of touch-screen systems synchronously detect, in electronic equipment, wherein, touch-screen is connected with touch chip, it is characterized in that, touches the spectrum signature prestoring display in chip, said method comprising the steps of:
The timing of described touch chip, and judge whether detection time;
If to detection time, touch chip and received detected signal;
Described touch chip carries out FFT process to detected signal, to obtain the spectrum signature of detected signal;
Described touch chip judges that whether the spectrum signature of described detected signal is consistent with the spectrum signature of described display;
If inconsistent, then described touch chip record this detection time is driving time section, synchronously completes.
35. methods as claimed in claim 34, is characterized in that, if described touch chip judges that the spectrum signature of described detected signal is consistent with the spectrum signature of display, then described touch chip record this detection time is displaying time section.
36. methods as claimed in claim 34, it is characterized in that, also comprise: after synchronously completing, wherein described detected signal is converted to matrix data, and judge whether described touch-screen has touch action according to described matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
The method that 37. 1 kinds of touch-screen systems synchronously detect, in electronic equipment, wherein, touch-screen is connected with touch chip, it is characterized in that, touches the frequency range prestoring display in chip, said method comprising the steps of:
The timing of described touch chip, and judge whether detection time;
If to detection time, touch chip and received detected signal;
Described touch chip utilizes frequency range 1 a pair detected signal of described display to carry out quadrature demodulation and obtains whole signal to be detected;
Described touch chip judges whether the amplitude of described whole signal to be detected is all less than the 3rd predetermined threshold value;
If be all less than described 3rd predetermined threshold value, then described touch chip record this detection time is free time section, synchronously completes.
38. methods as claimed in claim 37, is characterized in that, if the amplitude of described whole signal to be detected has at least one to be more than or equal to described 3rd predetermined threshold value, then described touch chip record this detection time is displaying time section.
39. methods as claimed in claim 37, it is characterized in that, described touch chip is output drive signal extremely described touch-screen after synchronously completing, be used for obtaining the sampled signal of described touch-screen, and described sampled signal is converted to matrix data, judge whether described touch-screen has touch action according to described matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
The method that 40. 1 kinds of touch-screen systems synchronously detect, in electronic equipment, wherein, touch-screen is connected with touch chip, it is characterized in that, touch the frequency range prestoring the signal of the free time of described touch-screen in chip, said method comprising the steps of:
The timing of described touch chip, and judge whether detection time;
If to detection time, touch chip and received detected signal;
Described touch chip utilizes frequency range 1 a pair detected signal of the signal of the free time of described touch-screen to carry out quadrature demodulation and obtains whole signal to be detected;
Described touch chip judges whether the amplitude of described whole signal to be detected is all less than the 4th predetermined threshold value;
If be all less than described 4th predetermined threshold value, then described touch chip record this detection time is free time section, synchronously completes.
41. methods as claimed in claim 40, is characterized in that, if the amplitude of described whole signal to be detected has at least one to be more than or equal to described 4th predetermined threshold value, then described touch chip record this detection time is displaying time section.
42. methods as claimed in claim 40, it is characterized in that, described touch chip is output drive signal extremely described touch-screen after synchronously completing, be used for obtaining the sampled signal of described touch-screen, and described sampled signal is converted to matrix data, judge whether described touch-screen has touch action according to described matrix data, and corresponding touch action and coordinate are reported to electronic equipment.
The method that 43. 1 kinds of touch-screen systems synchronously detect, in electronic equipment, wherein, touch-screen is connected with touch chip, it is characterized in that, touches the spectrum signature prestoring display in chip, said method comprising the steps of:
The timing of described touch chip, and judge whether detection time;
If to detection time, touch chip and received detected signal;
Described touch chip carries out FFT process to detected signal, to obtain the spectrum signature of detected signal;
Described touch chip judges that whether the spectrum signature of described detected signal is consistent with the spectrum signature of described display;
If inconsistent, then described touch chip record this detection time is free time section, synchronously completes.
44. methods as claimed in claim 43, is characterized in that, if the spectrum signature of described detected signal is consistent with the spectrum signature of described display, then described touch chip record this detection time is displaying time section.
45. methods as claimed in claim 43, it is characterized in that, described touch chip is output drive signal extremely described touch-screen after synchronously completing, be used for obtaining the sampled signal of described touch-screen, and described sampled signal is converted to matrix data, judge whether described touch-screen has touch action according to described matrix data, and corresponding touch action is reported to electronic equipment.
The method that 46. 1 kinds of touch-screen systems synchronously detect, in electronic equipment, wherein, touch-screen is connected with touch chip, it is characterized in that, touch the spectrum signature prestoring the signal of the free time of described touch-screen in chip, said method comprising the steps of:
The timing of described touch chip, and judge whether detection time;
If to detection time, touch chip and received detected signal;
Described touch chip carries out FFT process to detected signal, to obtain the spectrum signature of detected signal;
Described touch chip judges that whether the spectrum signature of described detected signal is consistent with the spectrum signature of the signal of the free time of described touch-screen;
If so, then described touch chip record this detection time is free time section, synchronously completes.
47. methods as claimed in claim 46, is characterized in that, if the spectrum signature of the signal of the spectrum signature of described detected signal and the free time of described touch-screen is inconsistent, then described touch chip record this detection time is displaying time section.
48. methods as claimed in claim 46, it is characterized in that, described touch chip is output drive signal extremely described touch-screen after synchronously completing, be used for obtaining the sampled signal of described touch-screen, and described sampled signal is converted to matrix data, judge whether described touch-screen has touch action according to described matrix data, and corresponding touch action is reported to electronic equipment.
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