CN102609162A - Touch panel and signal processing method thereof - Google Patents
Touch panel and signal processing method thereof Download PDFInfo
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- CN102609162A CN102609162A CN201210033729XA CN201210033729A CN102609162A CN 102609162 A CN102609162 A CN 102609162A CN 201210033729X A CN201210033729X A CN 201210033729XA CN 201210033729 A CN201210033729 A CN 201210033729A CN 102609162 A CN102609162 A CN 102609162A
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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, particularly relevant for a kind of contact panel and signal processing method thereof.
Background technology
The relevant rapid technological improvement of contact panel in recent years; For example 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 the consumption electronic products convenience of using the usefulness that significantly increases applied electronic product and using.
And capacitor-type touch panel can be imported with finger; Facility with input operation; And its input operation need not passed through and presses, the shortcoming that can not let panel have to bear the stress, distortion and causing of touching repeatedly to damage, and composition simple structure, the assembly of this kind touch pad are few; The product yield is high, is fit to produce to reduce cost in a large number.
Fig. 1 is the sectional view of convention touch sensor (touch sensor) 100.Between a glass substrate 110 and an indium tin oxide layer 130 by an optical cement (optically clear adhesive; OCA) 120 and engage, and at this indium tin oxide layer (indium tin oxide; ITO) 130 and one cover glass (cover lens) is engaged by another optical cement 120 between 140, to accomplish this touch sensor 100.
Fig. 2 is the sectional view of convention contact panel (touch panel) 200.One touch sensor 100 is disposed at a LCD MODULE (LCD Module; LCM) 250 tops are to accomplish this contact panel 200.For example, the glass substrate 110 of touch sensor 100 is engaged in this LCD MODULE 250, and between this LCD MODULE 250 and this glass substrate 110, an air gap 260 is arranged.
The basic framework figure that Fig. 3 handles for the signal of convention contact panel.Capacitance variation when touch sensor 100 can be responded to because of touching is exported analog signal and is given an analog-digital converter 330.This analog-digital converter 330 converts this analog signal to digital signal and deals with and export controlling signal to a microcontroller 340.At last, via a transmission interface 350 controlling signal is passed to an operating system 360 again and do computing, to judge the touch points position.
But after touch sensor was being costed LCD MODULE, touch sensor can receive the interference of noise that LCD MODULE brings and cause the situation of wrong report touch points easily.For example; LCD MODULE under normal operation; Can produce different surface noise (surface noise) because of picture is different, can cause the surface of LCD MODULE unsettled measurement voltage (that is surface noise) to occur during for example at heavily loaded picture or at the fast updating picture.Fig. 4 is the sequential chart of the surface noise of LCD MODULE, and its red green and blue (RGB) picture element is the picture (CS-open) and the complete black picture (black) of bright dark (between secretly exposing), and it all has surface noise.
Therefore, just having to provide a kind of contact panel and signal processing method thereof, can solve aforesaid problem.
Summary of the invention
A purpose of the present invention is that contact panel can solve touch sensor and can receive the interference of noise that display module brings.
The present invention provides a kind of contact panel, comprises: a display module, comprise a sequential control circuit and a data drive circuit, and this sequential control circuit is exported a plurality of breech lock signals and is given this data drive circuit, and wherein this display module produces a plurality of surface noises; One touch sensor is disposed at this display module top, and exports a plurality of abnormal signals, and wherein this abnormal signal comprises a sensor signal and this surface noise; An and 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 upper limb or the lower edge of each period of those breech lock signals, suspends the processing of those sensor signals in this schedule time; Above the processing of proceeding those sensor signals after this schedule time again, to avoid the period of those surface noises.
The present invention provides a kind of signal processing method that is used for contact panel in addition; Comprise the following step: steps A: a display module and a touch sensor are provided, and wherein this display module comprises a sequential control circuit, and this sequential control circuit is exported a plurality of breech lock signals; This display module produces a plurality of surface noises; This touch sensor is disposed at this display module top, and this touch sensor is exported a plurality of abnormal signals, 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 upper limb or the lower edge of each period of those breech lock signals; And step C: suspend the processing of those sensor signals in this schedule time, above the processing of proceeding those sensor signals after this schedule time again, to avoid the period of those surface noises.
Contact panel with signal processing unit of the present invention can solve that touch sensor can receive the interference of noise that display module brings and the problem that causes the wrong report touch points easily.
In order to let above-mentioned and other purposes of the present invention, characteristic and the advantage can be more obvious, hereinafter will cooperate appended diagram, elaborate as follows.
Description of drawings
Fig. 1 is the sectional view of convention touch sensor;
Fig. 2 is the sectional view of convention contact panel;
The basic framework figure that Fig. 3 handles for the signal of convention contact panel;
Fig. 4 is the sequential chart of the surface noise of LCD MODULE, and wherein the longitudinal axis is a 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 horizontal synchronization signal, breech lock signal and the surface noise of the display module of one embodiment of the invention, and wherein the longitudinal axis is a 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 that is used for contact panel of one embodiment of the invention.
[primary clustering symbol description]
100 touch sensors, 110 glass substrates
120 optical cements, 130 indium tin oxide layers
140 cover glasses, 200 contact panels
250 LCD MODULEs, 260 air gaps
330 analog-digital converters, 340 microcontrollers
350 transmission interfaces, 360 operating systems
400 contact panels, 410 touch sensors
430 signal processing units, 530 analog-digital converters
540 microcontrollers, 542 RCAs
550 transmission interfaces, 560 operating systems
610 sequential control circuits, 620 scan drive circuits
630 data drive circuits, 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 a display module 640, a touch sensor 410 and a signal processing unit 430.This touch sensor (touch sensor) 410 is configurable in this display module 640 (for example LCD MODULE) top, and this signal processing unit 430 is electrically connected at this touch sensor 410.
This display module 640 can produce a plurality of surface noises, can cause the surface of this display module 640 unsettled measurement voltage to occur during for example at heavily loaded picture or at the fast updating picture.The surface noise of this display module 640 can influence the sensor signal that this touch sensor 410 is exported, and becomes abnormal signal (that is abnormal signal comprises sensor signal and surface noise).This touch sensor 410 can send this abnormal signal to a signal processing unit 430.
Fig. 6 is the basic framework figure of the display module 640 of one embodiment of the invention.One sequential control circuit (T-CON) 610 is exported to scan driving circuit 620 with vertical synchronizing signal STV and enable signal OE.This scan drive circuit 620 output scanning signal SS (1) ~ SS (m) gives the sweep trace of this display module 640.The sequential that cooperates these scan drive circuit 620 output scanning signals, this sequential control circuit 610 are also exported horizontal synchronization signal STH, digital displaying data DD and breech lock signal (latch signal) TP and are given a data drive circuit 630.This data drive circuit 630 output display signal AD (1) ~ AD (n) give the data line of this display module 640, so make this display module 640 image occur.
Fig. 7 is the sequential chart of horizontal synchronization signal, breech lock signal and the surperficial signal of display module.Learn that through repeatedly testing the surface noise of this display module 640 mainly is synchronous with the breech lock signal TP of frequency control circuit 610, rather than synchronous with horizontal synchronization signal STH.This signal processing unit 430 comprises a RCA 542 and a microcontroller 540, and this RCA 542 is in order to this microcontroller 540 is electrically connected to this sequential control circuit 610, and is to receive those breech lock signals, as shown in Figure 5.This microcontroller 540 receives those abnormal signals; And can calculate a schedule time by upper limb (rising edge) or the lower edge (falling edge) of each period of utilizing the breech lock signal; Suspend the processing of sensor signal in this schedule time; Above the processing of proceeding sensor signal after this schedule time again, to avoid the period of surface noise.For example, utilize the upper limb of each period of breech lock signal to calculate a schedule time T, do not do the processing of sensor signal in this schedule time T.This schedule time T for example should can be made as greater than 3.52 μ s by schedule time T greater than the duration of each period of those surface noises of this display module 640.
Please refer to Fig. 8, in detail, this signal processing unit 430 comprises an analog-digital converter 530, a transmission interface 550 and an operating system 560 in addition.This touch sensor 410 originally can be exported a sensor signal; But receive the noise of this display module 640, this touch sensor 410 can be exported those abnormal signals (comprising sensor signal and noise) on the contrary and give 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 handles those abnormal signals and export a plurality of controlling signal with the period of avoiding those surface noises.At last, by this transmission interface (serial interface) 550 those controlling signal are passed to this operating system (operating system; OS) 560 carry out computing, to judge the touch points position.Capacitance variation during for example, because of touching causes sensor signal to change computing and learns the touch points position.This signal processing unit 430 can be described as a touch-control integrated circuit (touch IC).
Please refer to Fig. 9, show the process flow diagram of the signal processing method that is used for contact panel of one embodiment of the invention.In step S900; One display module and a touch sensor are provided, and wherein this display module comprises a sequential control circuit, and this sequential control circuit is exported a plurality of breech lock signals; This display module produces a plurality of surface noises; This touch sensor is disposed at this display module top, and this touch sensor is exported a plurality of abnormal signals, 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 is meant that unsettled 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 upper limb or the lower edge of each period of those breech lock signals.In step S906, suspend the processing of those sensor signals in this schedule time, above the processing of proceeding those sensor signals after this schedule time again, to avoid the period of those surface noises.This schedule time is greater than the duration of each period of those surface noises.In step S908, export a plurality of controlling signal.In step S910, those controlling signal are carried out computing, to judge the touch points position.
Contact panel with signal processing unit of the present invention can solve that touch sensor can receive the interference of noise that display module brings and the problem that causes the wrong report touch points easily.
In sum, be only notebook invention for presenting the embodiment or the embodiment of the technological means that adopted of dealing with problems, be not the scope that is used for limiting patent working of the present invention.Be that patent claim context all and of the present invention conforms to, or change and modification, be all claim of the present invention and contain according to the equalization that claim of the present invention is done.
Claims (11)
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 is exported a plurality of breech lock signals and given this data drive circuit, and wherein this display module produces a plurality of surface noises;
One touch sensor is disposed at this display module top, and exports a plurality of abnormal signals, 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 upper limb or the lower edge of each period of those breech lock signals, suspends the processing of those sensor signals in this schedule time; Above the processing of proceeding those sensor signals after this schedule time again, to avoid the period of those surface noises.
2. contact panel according to claim 1 is characterized in that: wherein those surface noises are synchronous with those breech lock signals.
3. contact panel according to claim 1 is characterized in that: wherein this signal processing unit comprises a RCA and a microcontroller, and this RCA is in order to be electrically connected to this sequential control circuit with this microcontroller, to receive those breech lock signals.
4. contact panel according to claim 3; It is characterized in that: wherein this signal processing unit comprises an analog-digital converter, a transmission interface and an operating system in addition; These those abnormal signals of touch sensor output are given this analog-digital converter; This analog-digital converter converts those abnormal signals to digital signal by analog signal and gives microcontroller; This microcontroller receives and handles those abnormal signals of this touch sensor and exports a plurality of controlling signal with the period of avoiding those surface noises, and by this transmission interface controlling signal is passed to this operating system and carry out computing, to judge the touch points position.
5. contact panel according to claim 1 is characterized in that: wherein should the schedule time greater than duration of each period of those surface noises.
6. contact panel according to claim 5 is characterized in that: wherein this schedule time is made as greater than 3.52 μ s.
7. contact panel according to claim 1 is characterized in that: wherein this surface noise is meant that unsettled measurement voltage appears in the surface of this display module.
8. a signal processing method that is used for contact panel is characterized in that, comprises 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 is exported a plurality of breech lock signals, and this display module produces a plurality of surface noises, and this touch sensor is disposed at this display module top; This touch sensor is exported a plurality of abnormal signals, 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 upper limb or the lower edge of each period of those breech lock signals; And
Step C: suspend the processing of those sensor signals in this schedule time, above the processing of proceeding those sensor signals after this schedule time again, to avoid the period of those surface noises.
9. the signal processing method that is used for contact panel according to claim 8 is characterized in that other comprises the following step:
After steps A, convert those abnormal signals to digital signal by analog signal;
Behind step C, export a plurality of controlling signal; And
Those controlling signal are carried out computing, to judge the touch points position.
10. the method for processing noise that is used for contact panel according to claim 8 is characterized in that: wherein those surface noises are synchronous with those breech lock signals.
11. the method for processing noise that is used for contact panel according to claim 8 is characterized in that: wherein should the schedule time greater than duration of each period of those surface noises.
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 true CN102609162A (en) | 2012-07-25 |
| CN102609162B CN102609162B (en) | 2015-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210033729.XA Expired - Fee Related CN102609162B (en) | 2012-02-15 | 2012-02-15 | Touch panel and signal processing method thereof |
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| 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 |
| CN102402331A (en) * | 2010-09-07 | 2012-04-04 | 乐金显示有限公司 | Display device having touch sensor and method of driving the same |
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2012
- 2012-02-15 CN CN201210033729.XA patent/CN102609162B/en not_active Expired - Fee Related
Patent Citations (8)
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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 |
| CN101271211A (en) * | 2007-03-19 | 2008-09-24 | 精工爱普生株式会社 | Liquid crystal device, electronic apparatus and position detecting method |
| 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 |
| US20090202002A1 (en) * | 2008-02-13 | 2009-08-13 | Apple Inc. | Reducing errors in data by synchronizing operations with noiseless periods of data transmission |
| CN201281846Y (en) * | 2008-10-22 | 2009-07-29 | 华矽半导体股份有限公司 | Electronic device |
| CN101800039A (en) * | 2009-01-21 | 2010-08-11 | 松下电工株式会社 | Monitoring and control device |
| CN102402331A (en) * | 2010-09-07 | 2012-04-04 | 乐金显示有限公司 | Display device having touch sensor and method of driving 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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| CN102609162B (en) | 2015-01-07 |
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