CN102609162B - Touch panel and signal processing method thereof - Google Patents
Touch panel and signal processing method thereof Download PDFInfo
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- CN102609162B CN102609162B CN201210033729.XA CN201210033729A CN102609162B CN 102609162 B CN102609162 B CN 102609162B CN 201210033729 A CN201210033729 A CN 201210033729A CN 102609162 B CN102609162 B CN 102609162B
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Abstract
The invention relates to a touch panel and a signal processing method thereof. The touch panel comprises a display module, a touch sensor, and a signal processing unit, wherein the display module comprises a sequential control circuit and a data-driven circuit, the sequential control circuit outputs a plurality of latch signals to the data-driven circuit and the display module generates a plurality of surface noises; the touch sensor is disposed above the display module and outputs a plurality of abnormality signals, the abnormality signals comprises a sensing signal and the surface noises; the signal processing unit is electrically connected with the touch sensor and receives the abnormality signals, the signal processing unit calculates a preset period according to the start or the stop of each period of the latch signals, the processing of the sensing signals is paused during the preset period, and processing of the sensing signals is continued after the preset period so that the period of surface noises is avoided.
Description
Technical field
The invention relates to a kind of signal processing method, relate to a kind of contact panel and signal processing method thereof especially.
Background technology
The rapid technological improvement that contact panel is relevant in recent years, such as electric resistance touch-control panel, capacitance type touch-control panel, acoustic wave contact panel and optical touch control panel, be widely used on communication product, computer installation and consumption electronic products, the usefulness using the electronic product that significantly increase is applied and the convenience used.
And capacitor-type touch panel can input with finger, there is the facility of input operation, and its input operation does not need through pressing, panel can not be allowed to have bear the shortcoming that stress, the distortion and causing repeatedly touched damage, and the composition simple structure of this kind of touch pad, assembly are few, product yield is high, is applicable to producing to reduce costs in a large number.
Fig. 1 is the sectional view of known touch sensor (touch sensor) 100.By an optical cement (optically clear adhesive between a glass substrate 110 and an indium tin oxide layer 130; OCA) 120 and engage, and at this indium tin oxide layer (indium tin oxide; ITO) 130 and one engaged by another optical cement 120, to complete this touch sensor 100 between cover glass (cover lens) 140.
Fig. 2 is the sectional view of known contact panel (touch panel) 200.One touch sensor 100 is configured at a LCD MODULE (LCD Module; LCM) above in the of 250, to complete this contact panel 200.Citing, the glass substrate 110 of touch sensor 100 is engaged in this LCD MODULE 250, and has an air gap 260 between this LCD MODULE 250 and this glass substrate 110.
Fig. 3 is the basic framework figure of the signal process of known contact panel.Touch sensor 100 can respond to because of touching time capacitance variation and export analog signal give an analog-digital converter 330.This analog signal is converted to digital signal and deals with and output control signal to a microcontroller 340 by this analog-digital converter 330.Finally, then control signal is passed to an operating system 360 to do computing, to judge touch points position via a transmission interface 350.
But at touch sensor after costing LCD MODULE, touch sensor can be subject to the interference of the noise that LCD MODULE is brought and easily cause the situation reporting touch points by mistake.Citing, LCD MODULE under normal operation, different surface noises (surface noise) can be produced because picture is different, such as, time at heavily loaded picture or at quick renewal picture, the surface of LCD MODULE can be caused to occur unstable measurement voltage (that is surface noise).Fig. 4 is the sequential chart of the surface noise of LCD MODULE, its red green and blue (RGB) picture element is picture (CS-open) and the complete black picture (black) of one bright one dark (between secretly exposing), and it all has surface noise.
Therefore, just there are needs to provide a kind of contact panel and signal processing method thereof, aforesaid problem can be solved.
Summary of the invention
An object of the present invention can solve the interference that touch sensor can be subject to the noise that display module brings for contact panel.
The invention provides a kind of contact panel, comprise: a display module, comprise a sequential control circuit and a data drive circuit, this sequential control circuit exports multiple breech lock signal to this data drive circuit, and wherein this display module produces multiple surface noise; One touch sensor, is configured at above this display module, and exports multiple abnormal signal, and wherein this abnormal signal comprises a sensor signal and this surface noise; And a signal processing unit, be electrically connected at this touch sensor, and receive those abnormal signals, wherein this signal processing unit calculates a schedule time according to the upper limb of each period of those breech lock signals or lower edge, the process of those sensor signals is suspended in this schedule time, the process of those sensor signals is proceeded again, to avoid the period of those surface noises after exceeding this schedule time.
The present invention separately provides a kind of signal processing method for contact panel, comprise the following step: steps A: provide a display module and a touch sensor, wherein this display module comprises a sequential control circuit, this sequential control circuit exports multiple breech lock signal, this display module produces multiple surface noise, this touch sensor is configured at above this display module, and this touch sensor exports multiple abnormal signal, and this abnormal signal comprises a sensor signal and this surface noise; Step B: receive those abnormal signals, and calculate a schedule time according to the upper limb of each period of those breech lock signals or lower edge; And step C: the process suspending those sensor signals in this schedule time, proceeds the process of those sensor signals, again to avoid the period of those surface noises after exceeding this schedule time.
The contact panel with signal processing unit of the present invention can solve touch sensor and can be subject to the interference of the noise that display module brings and easily cause the problem reporting touch points by mistake.
More obviously, hereafter can will coordinate appended diagram, be described in detail below to allow above and other object of the present invention, feature and advantage.
Accompanying drawing explanation
Fig. 1 is the sectional view of known touch sensor;
Fig. 2 is the sectional view of known contact panel;
Fig. 3 is the basic framework figure of the signal process of known contact panel;
Fig. 4 is the sequential chart of the surface noise of LCD MODULE, and wherein the longitudinal axis is voltage, and transverse axis is the time;
Fig. 5 is the basic framework figure of the contact panel of one embodiment of the invention;
Fig. 6 is the basic framework figure of the display module of one embodiment of the invention;
Fig. 7 is the sequential chart of the horizontal synchronization signal of the display module of one embodiment of the invention, breech lock signal and surface noise, and wherein the longitudinal axis is voltage, and transverse axis is the time;
Fig. 8 is the touch sensor of one embodiment of the invention and the basic framework figure of signal processing unit; And
Fig. 9 is the process flow diagram of the signal processing method for contact panel of one embodiment of the invention.
[primary clustering symbol description]
100 touch sensor 110 glass substrates
120 optical cement 130 indium tin oxide layers
140 cover glass 200 contact panels
250 LCD MODULE 260 air gaps
330 analog-digital converter 340 microcontrollers
350 transmission interface 360 operating systems
400 contact panel 410 touch sensors
430 signal processing unit 530 analog-digital converters
540 microcontroller 542 signal line
550 transmission interface 560 operating systems
610 sequential control circuit 620 scan drive circuits
630 data drive circuit 640 display modules
AD (1) ~ AD (n) display signal DD digital displaying data
OE enable signal SS (1) ~ SS (m) scans signal
STH horizontal synchronization signal STV vertical synchronizing signal
TP breech lock signal
S900 step S902 step
S904 step S906 step
S908 step S910 step.
Embodiment
Fig. 5 is the basic framework figure of the contact panel 400 of one embodiment of the invention.This contact panel 400 comprises display module 640, touch sensor 410 and a signal processing unit 430.This touch sensor (touch sensor) 410 is configurable in this display module 640 (such as LCD MODULE) top, and this signal processing unit 430 is electrically connected at this touch sensor 410.
This display module 640 can produce multiple surface noise, such as, the surface of this display module 640 can be caused to occur unstable measurement voltage time at heavily loaded picture or at quick renewal picture.The surface noise of this display module 640 can affect the sensor signal that this touch sensor 410 exports, and becomes abnormal signal (that is abnormal signal comprises sensor signal and surface noise).This abnormal signal can be sent to a signal processing unit 430 by this touch sensor 410.
Fig. 6 is the basic framework figure of the display module 640 of one embodiment of the invention.Vertical synchronizing signal STV and enable signal OE is exported to scan driving circuit 620 by one sequential control circuit (T-CON) 610.This scan drive circuit 620 exports scanning signal SS (1) ~ SS (m) to the sweep trace of this display module 640.Coordinate this scan drive circuit 620 to export the sequential of scanning signal, this sequential control circuit 610 also output level sync signal STH, digital displaying data DD and breech lock signal (latch signal) TP gives a data drive circuit 630.This data drive circuit 630 output display signal AD (1) ~ AD (n), to the data line of this display module 640, so makes this display module 640 occur image.
Fig. 7 is the sequential chart of the horizontal synchronization signal of display module, breech lock signal and surperficial signal.Learn through many experiments, the surface noise of this display module 640 is mainly synchronous with the breech lock signal TP of frequency control circuit 610, instead of synchronous with horizontal synchronization signal STH.This signal processing unit 430 comprises signal line 542 and a microcontroller 540, this signal line 542 in order to this microcontroller 540 is electrically connected to this sequential control circuit 610, to receive those breech lock signals, as shown in Figure 5.This microcontroller 540 receives those abnormal signals, and a schedule time can be calculated by utilizing the upper limb of each period of breech lock signal (rising edge) or lower edge (falling edge), the process of sensor signal is suspended in this schedule time, the process of sensor signal is proceeded again, to avoid the period of surface noise after exceeding this schedule time.Citing, utilizes the upper limb of each period of breech lock signal to calculate a schedule time T, does not do the process of sensor signal in this schedule time T.This schedule time, T was greater than the duration of each period of those surface noises of this display module 640, and such as this schedule time T can be set to and be greater than 3.52 μ s.
Please refer to Fig. 8, specifically, this signal processing unit 430 separately comprises analog-digital converter 530, transmission interface 550 and an operating system 560.This touch sensor 410 can export a sensor signal originally, but be subject to the noise of this display module 640, this touch sensor 410 can export those abnormal signals (comprising sensor signal and noise) on the contrary to this analog-digital converter (analog to digital converter; ADC) 530.This analog-digital converter 530 converts this abnormal signal to digital signal to this microcontroller (micro-controller unit by analog signal; MCU) 540.This microcontroller 540 receives and processes those abnormal signals and exports multiple control signal to avoid the period of those surface noises.Finally, by this transmission interface (serial interface) 550, those are controlled signal and pass to this operating system (operating system; OS) 560 carry out computing, to judge touch points position.Such as, because capacitance variation during touching causes sensor signal change, touch points position is learnt in computing.This signal processing unit 430 can be described as a touch-control integrated circuit (touch IC).
Please refer to Fig. 9, the process flow diagram of the signal processing method for contact panel of display one embodiment of the invention.In step S900, one display module and a touch sensor are provided, wherein this display module comprises a sequential control circuit, this sequential control circuit exports multiple breech lock signal, this display module produces multiple surface noise, this touch sensor is configured at above this display module, and this touch sensor exports multiple abnormal signal, and this abnormal signal comprises a sensor signal and this surface noise.Those surface noises are synchronous with those breech lock signals, and this surface noise refers to that unstable measurement voltage appears in the surface of this display module.In step S902, convert those abnormal signals to digital signal by analog signal.In step S904, receive those abnormal signals, and calculate a schedule time according to the upper limb of each period of those breech lock signals or lower edge.In step S906, suspend the process of those sensor signals in this schedule time, proceed the process of those sensor signals after exceeding this schedule time again, to avoid the period of those surface noises.This schedule time is greater than duration of each period of those surface noises.In step S908, export multiple control signal.In step S910, those are controlled signal and carries out computing, to judge touch points position.
The contact panel with signal processing unit of the present invention can solve touch sensor and can be subject to the interference of the noise that display module brings and easily cause the problem reporting touch points by mistake.
In sum, being only embodiment or the embodiment of notebook invention for presenting adopted technological means of dealing with problems, being not used for limiting the scope of patent working of the present invention.Namely all and of the present invention patent claim contexts conform to, or change according to the equalization that the scope of the claims of the present invention does and modify, and are all the scope of the claims of the present invention and contain.
Claims (2)
1. a contact panel, is characterized in that, comprises:
One display module, comprises a sequential control circuit and a data drive circuit, and this sequential control circuit exports multiple breech lock signal to this data drive circuit, and wherein this display module produces multiple surface noise;
One touch sensor, is configured at above this display module, and exports multiple abnormal signal, and wherein this abnormal signal comprises a sensor signal and this surface noise; And
One signal processing unit, be electrically connected at this touch sensor, and receive those abnormal signals, wherein this signal processing unit calculates a schedule time according to the upper limb of each period of those breech lock signals or lower edge, the process of those sensor signals is suspended in this schedule time, the process of those sensor signals is proceeded again after exceeding this schedule time, to avoid the period of those surface noises, wherein those surface noises are synchronous with those breech lock signals, and this schedule time is greater than duration of each period of those surface noises.
2. contact panel according to claim 1, is characterized in that: wherein this signal processing unit comprises a signal line and a microcontroller, this signal line in order to this microcontroller is electrically connected to this sequential control circuit, to receive those breech lock signals.
3. contact panel according to claim 2, it is characterized in that: wherein this signal processing unit separately comprises an analog-digital converter, one transmission interface and an operating system, this touch sensor exports those abnormal signals to this analog-digital converter, this analog-digital converter converts those abnormal signals to digital signal to microcontroller by analog signal, this microcontroller receives and those abnormal signals processing this touch sensor export multiple control signal to avoid the period of those surface noises, and by this transmission interface, control signal is passed to this operating system and carry out computing, to judge touch points position.
4. contact panel according to claim 1, is characterized in that: wherein this schedule time is set to and is greater than 3.52 μ s.
5. contact panel according to claim 1, is characterized in that: wherein this surface noise refers to that unstable measurement voltage appears in the surface of this display module.
6. for a signal processing method for contact panel, it is characterized in that, comprise the following step:
Steps A a: display module and a touch sensor are provided, wherein this display module comprises a sequential control circuit, this sequential control circuit exports multiple breech lock signal, this display module produces multiple surface noise, this touch sensor is configured at above this display module, this touch sensor exports multiple abnormal signal, and this abnormal signal comprises a sensor signal and this surface noise;
Step B: receive those abnormal signals, and calculate a schedule time according to the upper limb of each period of those breech lock signals or lower edge; And
Step C: the process suspending those sensor signals in this schedule time, proceeds the process of those sensor signals, again to avoid the period of those surface noises after exceeding this schedule time; Wherein those surface noises are synchronous with those breech lock signals; Wherein this schedule time is greater than the duration of each period of those surface noises.
7. the signal processing method for contact panel according to claim 6, is characterized in that, separately comprise the following step:
After steps A, convert those abnormal signals to digital signal by analog signal;
After step C, export multiple control signal; And
Those are controlled signal and carries out computing, to judge touch points position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210033729.XA CN102609162B (en) | 2012-02-15 | 2012-02-15 | Touch panel and signal processing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210033729.XA CN102609162B (en) | 2012-02-15 | 2012-02-15 | Touch panel and signal processing method thereof |
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| CN102609162A CN102609162A (en) | 2012-07-25 |
| CN102609162B true CN102609162B (en) | 2015-01-07 |
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| CN101145325A (en) * | 2006-09-14 | 2008-03-19 | 恩益禧电子股份有限公司 | Driving circuit and data driver of planar display device |
| CN101320548A (en) * | 2007-03-28 | 2008-12-10 | 恩益禧电子股份有限公司 | Driver circuit of display unit separating amplifier and output terminal in response to test signal and method of controlling the same |
| CN102221934A (en) * | 2011-05-17 | 2011-10-19 | 友达光电股份有限公司 | Touch display device and method for reading touch signal thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4453710B2 (en) * | 2007-03-19 | 2010-04-21 | セイコーエプソン株式会社 | Liquid crystal device, electronic apparatus and position detection method |
| US8418046B2 (en) * | 2008-02-13 | 2013-04-09 | Apple Inc. | Data signal handling circuitry and methods with error analysis capabilities |
| CN201281846Y (en) * | 2008-10-22 | 2009-07-29 | 华矽半导体股份有限公司 | Electronic device |
| CA2690585C (en) * | 2009-01-21 | 2013-03-26 | Panasonic Electric Works Co., Ltd. | Monitoring and control device |
| KR101394937B1 (en) * | 2010-09-07 | 2014-05-15 | 엘지디스플레이 주식회사 | Display device having touch sensor and method for driving the same |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101145325A (en) * | 2006-09-14 | 2008-03-19 | 恩益禧电子股份有限公司 | Driving circuit and data driver of planar display device |
| CN101320548A (en) * | 2007-03-28 | 2008-12-10 | 恩益禧电子股份有限公司 | Driver circuit of display unit separating amplifier and output terminal in response to test signal and method of controlling the same |
| CN102221934A (en) * | 2011-05-17 | 2011-10-19 | 友达光电股份有限公司 | Touch display device and method for reading touch signal thereof |
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Granted publication date: 20150107 Termination date: 20210215 |