CN103543893B - The driving method of touch-control system - Google Patents
The driving method of touch-control system Download PDFInfo
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- CN103543893B CN103543893B CN201310425430.3A CN201310425430A CN103543893B CN 103543893 B CN103543893 B CN 103543893B CN 201310425430 A CN201310425430 A CN 201310425430A CN 103543893 B CN103543893 B CN 103543893B
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Abstract
A driving method for touch-control system, comprises a liquid crystal panel drive circuit in an image time according to one first control signal, sequentially drives each block of the plurality of blocks of a liquid crystal panel to show an image; One touch control sensing circuit according to one second control signal, captures the current panel noise floor value of a touch-control block of this block of non-corresponding in a contact panel when this block shows this image; This touch control sensing circuit, according to this current panel noise floor value, upgrades the front panel noise floor value of this touch-control block at last image time; This touch control sensing circuit according to one the 3rd control signal, to this touch-control onblock executing one touch detection to produce a touch-control raw data; This touch control sensing circuit, according to this touch-control raw data and this current panel noise floor value, produces should the touch data of Touch Zone block.
Description
Technical field
The invention relates to a kind of driving method of touch-control system, espespecially a kind of dynamic upgrades panel noise floor value to reduce the interference of liquid crystal panel and to increase the driving method of the touch-control system of the accuracy of the touch data that touch control sensing circuit produces.
Background technology
Capacitance type touch-control panel is often because the characteristic of external environment or liquid crystal panel produces noise.Such as when the liquid crystal of liquid crystal panel rotates, the rotation with liquid crystal changes by the capacitance of liquid crystal panel, and the change of the capacitance of liquid crystal panel will have an impact to the touching signals of capacitance type touch-control panel.When processor detecting touching signals, processor be utilize a critical value to judge whether touching signals is noise, that is when touching signals is greater than critical value, processor can judge that touching signals is real touching signals.But the noise mistake too greatly that the sometimes judged result meeting of processor produce because of capacitance type touch-control panel.
If when processor is utilize signal processing technology noise that filtering capacitance type touch-control panel produces, although the accuracy of the judged result of processor can be increased, the complexity of processor also can be increased.In addition, if processor is when utilizing that between the clear area of liquid crystal panel, (H-syncblanking or V-syncblanking of such as liquid crystal panel) performs touch detection, although can not increase the complexity of processor, report point rate (reportrate) of touching signals will be limited in 60Hz.
Therefore, above-mentioned prior art is not a good selection for the deviser of capacitance type touch-control panel.
Summary of the invention
One embodiment of the invention provide a kind of driving method of touch-control system, this touch-control system comprises time schedule controller, a contact panel, a liquid crystal panel, a liquid crystal panel drive circuit and a touch control sensing circuit, and wherein this liquid crystal panel is divided into plurality of blocks.The method comprises this time schedule controller and produces one first control signal, one second control signal and one the 3rd control signal; This liquid crystal panel drive circuit according to this first control signal, sequentially drives each block in this plurality of blocks to show an image in an image time; This touch control sensing circuit synchronously according to this second control signal, captures the current panel noise floor value of a touch-control block of this block of non-corresponding in this contact panel when this block shows this image; This touch control sensing circuit, according to this current panel noise floor value, upgrades the front panel noise floor value of this touch-control block in last image time; This touch control sensing circuit according to the 3rd control signal, to this touch-control onblock executing one touch detection to produce a corresponding touch-control raw data; This touch control sensing circuit, according to this touch-control raw data and this current panel noise floor value, produces should the touch data of Touch Zone block.
Another embodiment of the present invention provides a kind of driving method of touch-control system, this touch-control system comprises time schedule controller, a contact panel, a liquid crystal panel, a liquid crystal panel drive circuit and a touch control sensing circuit, and wherein this liquid crystal panel is divided into plurality of blocks.The method comprises this time schedule controller and produces one first control signal, one second control signal and one the 3rd control signal; This liquid crystal panel drive circuit according to this first control signal, sequentially drives each block in this plurality of blocks to show an image in an image time; The vertical blank of this touch control sensing circuit in this image time is interval, according to this second control signal, captures should the current panel noise floor value of contact panel; This touch control sensing circuit, according to this panel noise floor value, upgrades the front panel noise floor value of this contact panel in last image time; This touch control sensing circuit according to the 3rd control signal, to touch-control onblock executing one touch detection in this contact panel to produce a corresponding touch-control raw data; This touch control sensing circuit, according to this touch-control raw data and this current panel noise floor value, produces should the touch data of Touch Zone block.
The invention provides a kind of driving method of touch-control system.This driving method utilizes the current panel noise floor value of a touch-control block in the corresponding contact panel of a touch control sensing circuit acquisition, or utilize this touch control sensing circuit to capture should the current panel noise floor value of contact panel.When the acquisition of this touch control sensing circuit is to should in contact panel during the current panel noise floor value of this touch-control block, this touch control sensing circuit according to should Touch Zone block touch-control raw data and to should the current panel noise floor value of Touch Zone block, produce should the touch data of Touch Zone block; When the acquisition of this touch control sensing circuit to should the current panel noise floor value of contact panel time, this touch control sensing circuit according to should Touch Zone block touch-control raw data and to should the current panel noise floor value of contact panel, produce should the touch data of Touch Zone block.Compared to prior art, because dynamic of the present invention upgrade to should Touch Zone block current panel noise floor value or to should the current panel noise floor value of contact panel, so the present invention's interference that can reduce a liquid crystal panel is with the accuracy of the touch data increasing this touch control sensing circuit and produce, the report point rate of a touching signals also can not be limited.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that touch-control system is described;
Fig. 2 is the schematic diagram of the position relationship that contact panel and liquid crystal panel are described;
Fig. 3 illustrates that liquid crystal panel has the schematic diagram of plurality of blocks;
Fig. 4 is the process flow diagram that one embodiment of the invention illustrate a kind of driving method of touch-control system;
Fig. 5 is the schematic diagram that the display timing generator of the plurality of blocks that liquid crystal panel is described and touch control sensing circuit capture the sequential of the current panel noise floor value of contact panel;
Fig. 6 is the relation schematic diagram that current panel noise floor value, front panel noise floor value, critical value and touching signals are described;
Fig. 7 is the process flow diagram that another embodiment of the present invention illustrates a kind of driving method of touch-control system;
Fig. 8 is the schematic diagram that the display timing generator of the plurality of blocks that liquid crystal panel is described and touch control sensing circuit capture the sequential of the current panel noise floor value of contact panel.
[primary clustering symbol description]
100 touch-control systems
102 time schedule controllers
104 contact panels
106 liquid crystal panels
108 liquid crystal panel drive circuits
110 touch control sensing circuits
112 working areas
1061-106N block
FCS first control signal
FP image time
The current panel noise floor value of PNBL
PPNBL front panel noise floor value
SCS second control signal
TCS the 3rd control signal
THV critical value
TS touching signals
VSYNC1, VSYNC2 vertical synchronizing signal
VB vertical blank is interval
400-412,700-712 step.
Embodiment
Please refer to Fig. 1, Fig. 1 is the schematic diagram that touch-control system 100 is described.As shown in Figure 1, touch-control system 100 comprises time schedule controller 102, contact panel 104, liquid crystal panel 106 (not being illustrated in Fig. 1), liquid crystal panel drive circuit 108 and a touch control sensing circuit 110, wherein contact panel 104 is positioned at (as shown in Figure 2) on liquid crystal panel 106, liquid crystal panel 106 has plurality of blocks 1061-106N (as shown in Figure 3), and N is positive integer.In general, the number of the pixel column of liquid crystal panel 106 can be greater than the capable number of the touch control unit of contact panel 104.Therefore, in liquid crystal panel 106, the width of many pixel columns can equal the width that in contact panel 104, a touch control unit is capable, and the number of the plurality of blocks 1061-106N of liquid crystal panel 106 number capable with the touch-control sensing unit of contact panel 104 is identical.Such as: as shown in Figure 3, if the resolution of liquid crystal panel 106 is 540*960, and the width of 60 pixel columns equals the capable width of a touch control unit, then to have 16 touch control units capable for contact panel 104, and it is capable to have 16 touch control units because of contact panel 104, so liquid crystal panel 106 can have 16 blocks.But the width that the present invention is not limited to 60 pixel columns equals the capable width of a touch control unit.In addition, contact panel 104 is mutual inductance type capacitance touching control panels.But in another embodiment of the invention, contact panel 104 is self-induction type capacitance touching control panels.
Please refer to Fig. 4 and Fig. 5, Fig. 4 is the process flow diagram that one embodiment of the invention illustrate a kind of driving method of touch-control system, and Fig. 5 is the schematic diagram that the display timing generator of the plurality of blocks 1061-106N that liquid crystal panel 106 is described and touch control sensing circuit 110 capture the sequential of the current panel noise floor value of contact panel 104.The driving method of Fig. 4 utilizes the touch-control system 100 of Fig. 1 to illustrate, detailed step is as follows:
Step 400: start;
Step 402: time schedule controller 102 produces one first control signal FCS, one second control signal SCS and the 3rd control signal TCS;
Step 404: liquid crystal panel drive circuit 108 according to the first control signal FCS, sequentially drives each block in the plurality of blocks 1061-106N of liquid crystal panel 106 to show an image in an image time FP;
Step 406: synchronously according to the second control signal SCS during this block show image in plurality of blocks 1061-106N of touch control sensing circuit 110, the current panel noise floor value PNBL of a touch-control block of this block of non-corresponding in acquisition contact panel 104;
Step 408: touch control sensing circuit 110, according to the current panel noise floor value PNBL of the touch-control block of contact panel 104, upgrades the front panel noise floor value PPNBL of touch-control block in last image time of contact panel 104;
Step 410: touch control sensing circuit 110 according to the 3rd control signal TCS, to touch-control onblock executing one touch detection of contact panel 104 to produce a corresponding touch-control raw data;
Step 412: touch control sensing circuit 110, according to the touch-control raw data of the touch-control block of contact panel 104 and current panel noise floor value, produces the touch data of the touch-control block of corresponding contact panel 104, rebound step 402.
In step 404, liquid crystal panel drive circuit 108 in image time FP according to the first control signal FCS, from top to bottom sequentially drive each block in the plurality of blocks 1061-106N of liquid crystal panel 106 to show an image, wherein image time FP is continuous between vertical synchronizing signal VSYNC1, VSYNC2 between two of liquid crystal panel 106.Therefore, as shown in Figure 5, liquid crystal panel drive circuit 108, according to the first control signal FCS, drives block 1067 to show an image.That is liquid crystal panel drive circuit 108 is according to the first control signal FCS, block 1061-1066 is driven to show corresponding image.In a step 406, touch control sensing circuit 110 is according to the second control signal SCS, sequentially capture the current panel noise floor value of each block of contact panel 104, wherein touch control sensing circuit 110 can not according to the second control signal SCS, the current panel noise floor value of a block of corresponding block 1067 in acquisition contact panel 104.Therefore, when block 1067 show image, touch control sensing circuit 110 can according to the second control signal SCS, the current panel noise floor value PNBL (as shown in Figure 6) of a touch-control block of non-corresponding block 1067 in synchronous pick-up contact panel 104, wherein the touch-control block of contact panel 104 is the block in corresponding block 1061-1066 or the block in corresponding block 1068-106N.Because touch control sensing circuit 110 is according to the second control signal SCS, the current panel noise floor value PNBL of the touch-control block of non-corresponding block 1067 in synchronous pick-up contact panel 104, so the speed that the display speed of the plurality of blocks 1061-106N of liquid crystal panel 106 and touch control sensing circuit 110 capture the current panel noise floor value of a plurality of touch-control blocks of contact panel 104 is identical.In addition, if when touch control sensing circuit 110 is in block 1067 show image according to the second control signal SCS, the current panel noise floor value PNBL of the touch-control block of preparation acquisition contact panel 104, and according to the 3rd control signal TCS, when preparing the touch-control onblock executing touch detection to contact panel 104, touch control sensing circuit 110 is first according to the 3rd control signal TCS, to the touch-control onblock executing touch detection of contact panel 104, and then according to the second control signal SCS, the current panel noise floor value PNBL of the touch-control block of acquisition contact panel 104.In a step 408, touch control sensing circuit 110 is according to the current panel noise floor value PNBL of the touch-control block of contact panel 104, upgrade the front panel noise floor value PPNBL of touch-control block in last image time of contact panel 104, wherein the front panel noise floor value PPNBL of the touch-control block of contact panel 104 in last image time is the working area 112 be stored in touch-control system 100, and the current panel noise floor value PNBL of the touch-control block of contact panel 104 is arranged in touch-control block under the front panel noise floor value PPNBL of last image time (as shown in Figure 6).In step 410 and step 412, when touch control sensing circuit 110 is according to the 3rd control signal TCS, during to the touch-control onblock executing touch detection of contact panel 104 to produce a corresponding touch-control raw data, touch control sensing circuit 110 according to the touch-control raw data of the touch-control block of contact panel 104 and current panel noise floor value PNBL, can produce the touch data of the touch-control block of corresponding contact panel 104.
As shown in Figure 6, because touch control sensing circuit 110 is according to the current panel noise floor value PNBL of touch-control block, upgrade the front panel noise floor value PPNBL of touch-control block in last image time, so most of noise (being positioned on current panel noise floor value PNBL) is all ignored by touch control sensing circuit 110.Therefore, according to a current panel noise floor value PNBL and critical value THV, touch control sensing circuit 110 can judge that a touching signals TS is not noise.In addition, when contact panel 104 is self-induction type capacitance touching control panels, the current panel noise floor value PNBL of the touch-control block of contact panel 104 is arranged in touch-control block on the front panel noise floor value PPNBL of last image time.
Please refer to Fig. 7 and Fig. 8, Fig. 7 is the process flow diagram that another embodiment of the present invention illustrates a kind of driving method of touch-control system, and Fig. 8 is the schematic diagram that the display timing generator of the plurality of blocks 1061-106N that liquid crystal panel 106 is described and touch control sensing circuit 110 capture the sequential of the current panel noise floor value of contact panel 104.The driving method of Fig. 7 utilizes the touch-control system 100 of Fig. 1 to illustrate, detailed step is as follows:
Step 700: start;
Step 702: time schedule controller 102 produces one first control signal FCS, one second control signal SCS and the 3rd control signal TCS;
Step 704: liquid crystal panel drive circuit 108 according to the first control signal FCS, sequentially drives each block in the plurality of blocks 1061-106N of liquid crystal panel 106 to show an image in an image time FP;
Step 706: the interval VB of the vertical blank of touch control sensing circuit 110 in image time FP, according to the second control signal SCS, captures the current panel noise floor value PNBL of corresponding contact panel 104;
Step 708: touch control sensing circuit 110, according to the current panel noise floor value PNBL of contact panel 104, upgrades the front panel noise floor value PPNBL of contact panel 104 in last image time;
Step 710: touch control sensing circuit 110 according to the 3rd control signal TCS, to touch-control onblock executing one touch detection of contact panel 104 to produce a corresponding touch-control raw data;
Step 712: touch control sensing circuit 110, according to the current panel noise floor value PNBL of the touch-control raw data of the touch-control block of contact panel 104 and contact panel 104, produces the touch data of the touch-control block of corresponding contact panel 104, rebound step 702.
As shown in Figure 8, the difference of the embodiment of Fig. 7 and the embodiment of Fig. 4 is that touch control sensing circuit 110 is according to the second control signal SCS in the interval VB of vertical blank in step 706, capture the current panel noise floor value PNBL of corresponding contact panel 104, and touch control sensing circuit 110, according to the current panel noise floor value PNBL of contact panel 104, upgrades the front panel noise floor value PPNBL of contact panel 104 in last image time in step 708.Therefore, in the embodiment of Fig. 7, current panel noise floor value PNBL is corresponding whole contact panel 104, and a block of non-corresponding contact panel 104.In addition, all the other principle of operation of the embodiment of Fig. 7 are all identical with the embodiment of Fig. 4, do not repeat them here.
In sum, the driving method of touch-control system provided by the present invention is the current panel noise floor value utilizing touch control sensing circuit to capture a touch-control block in corresponding contact panel, or utilizes touch control sensing circuit to capture the current panel noise floor value of corresponding whole contact panel.When touch control sensing circuit captures the current panel noise floor value of this touch-control block in corresponding contact panel, touch control sensing circuit according to should Touch Zone block touch-control raw data and to should the current panel noise floor value of Touch Zone block, produce should the touch data of Touch Zone block; When the current panel noise floor value of the corresponding whole contact panel of touch control sensing circuit acquisition, touch control sensing circuit according to should the touch-control raw data of Touch Zone block and the current panel noise floor value of the whole contact panel of correspondence, produces should the touch data of Touch Zone block.Compared to prior art, because dynamic of the present invention upgrades should the current panel noise floor value of block and the current panel noise floor value of the whole contact panel of correspondence, so the present invention's interference that can reduce liquid crystal panel is with the accuracy of the touch data increasing touch control sensing circuit and produce, the report point rate of touching signals also can not be limited.
The foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (6)
1. the driving method of a touch-control system, it is characterized in that, this touch-control system comprises time schedule controller, a contact panel, a liquid crystal panel, a liquid crystal panel drive circuit and a touch control sensing circuit, and wherein this liquid crystal panel is divided into plurality of blocks, and the method comprises:
This time schedule controller produces one first control signal, one second control signal and one the 3rd control signal;
This liquid crystal panel drive circuit according to this first control signal, sequentially drives each block in this plurality of blocks to show an image in an image time;
This touch control sensing circuit synchronously according to this second control signal, captures the current panel noise floor value of a touch-control block of this block of non-corresponding in this contact panel when this block shows this image;
This touch control sensing circuit, according to this current panel noise floor value, upgrades the front panel noise floor value of this touch-control block in last image time;
This touch control sensing circuit according to the 3rd control signal, to this touch-control onblock executing one touch detection to produce a corresponding touch-control raw data; And
This touch control sensing circuit, according to this touch-control raw data and this current panel noise floor value, produces should the touch data of Touch Zone block.
2. driving method as claimed in claim 1, it is characterized in that, when this touch control sensing circuit when this block shows this image according to this second control signal, the current panel noise floor value of this touch-control block of preparation acquisition, and according to the 3rd control signal, when preparation is to this this touch detection of touch-control onblock executing, this touch control sensing circuit is first according to the 3rd control signal, to this this touch detection of touch-control onblock executing, and then according to this second control signal, capture the current panel noise floor value of this touch-control block.
3. driving method as claimed in claim 1, it is characterized in that, this image time is between two continuous vertical synchronizing signals of this liquid crystal panel.
4. driving method as claimed in claim 1, it is characterized in that, the number that the number of this plurality of blocks is capable with a plurality of touch-control sensing units of this contact panel is identical.
5. driving method as claimed in claim 1, it is characterized in that, this contact panel is a mutual inductance type capacitance touching control panel.
6. driving method as claimed in claim 1, it is characterized in that, this contact panel is a self-induction type capacitance touching control panel.
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| CN104536627B (en) * | 2014-12-29 | 2017-11-14 | 厦门天马微电子有限公司 | A kind of touch-control driving testing circuit, display panel and display device |
| CN108958518B (en) * | 2017-05-18 | 2021-08-06 | 群创光电股份有限公司 | Touch system and control method thereof |
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| CN101893957A (en) * | 2009-05-21 | 2010-11-24 | 索尼公司 | Display device and electronic unit |
| WO2012141148A1 (en) * | 2011-04-15 | 2012-10-18 | シャープ株式会社 | Touch panel equipped display device and control method for same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20120293447A1 (en) * | 2011-05-17 | 2012-11-22 | Victor Phay Kok Heng | Circuits and Methods for Differentiating User Input from Unwanted Matter on a Touch Screen |
| TW201335809A (en) * | 2012-02-23 | 2013-09-01 | Chunghwa Picture Tubes Ltd | Touch display apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893957A (en) * | 2009-05-21 | 2010-11-24 | 索尼公司 | Display device and electronic unit |
| WO2012141148A1 (en) * | 2011-04-15 | 2012-10-18 | シャープ株式会社 | Touch panel equipped display device and control method for same |
| CN103019483A (en) * | 2011-09-22 | 2013-04-03 | 义隆电子股份有限公司 | Touch object identification method |
| CN103279236A (en) * | 2012-09-24 | 2013-09-04 | 上海天马微电子有限公司 | Built-in capacitor touch displaying screen and method and system for measuring contacts of built-in capacitor touch displaying screen |
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Effective date of registration: 20230629 Address after: No. two, No. 1188 West Ring Road, Shengze Town, Wujiang District, Jiangsu, Suzhou Patentee after: Suzhou Shengze science and Technology Pioneer Park Development Co.,Ltd. Address before: No. 555 Jiangxing East Road, Tongli District, Wujiang Economic Development Zone, Suzhou City, Jiangsu Province, 215217 Patentee before: CPTW (WUJIANG) Co.,Ltd. Patentee before: Taiwan Zhonghua Picture Tube Co.,Ltd. |