CN103019488A - Capacitive touch device, touch controller and touch identifying method - Google Patents
Capacitive touch device, touch controller and touch identifying method Download PDFInfo
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- CN103019488A CN103019488A CN 201210528809 CN201210528809A CN103019488A CN 103019488 A CN103019488 A CN 103019488A CN 201210528809 CN201210528809 CN 201210528809 CN 201210528809 A CN201210528809 A CN 201210528809A CN 103019488 A CN103019488 A CN 103019488A
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- 230000006870 function Effects 0.000 claims description 12
- 239000003990 capacitor Substances 0.000 abstract description 5
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- 238000010586 diagram Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
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- 238000005259 measurement Methods 0.000 description 1
- 230000005055 memory storage Effects 0.000 description 1
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Abstract
The invention provides a capacitive touch device, a touch controller and a touch identifying method. The capacitive touch device comprises a capacitive touch key and the touch controller electrically connected to the capacitive touch key, wherein the capacitive touch key comprises an equivalent capacitor; and the touch controller is used for acquiring the practical capacitance value of the equivalent capacitor, judging whether the practical capacitance value is more than a preset maximal capacitance value or not, and forcibly calibrating the equivalent capacitor when the practical capacitance value is more than the maximal capacitance value. By the capacitive touch device, the interference of other interference signals to the capacitive touch key can be eliminated, and the anti-interference ability is improved. The invention also provides the touch controller and the touch identifying method.
Description
Technical field
The present invention relates to the touch-control field, especially relate to a kind of capacitive touch device, touch control controller and touch-control recognition methods.
Background technology
Because the progress of science and technology, touch technology generally has been applied on many equipment, become the most important application technologies of portable electron device such as present mobile phone such as touch screen and touch controlled key, and the touch-control sensing mode there are resistance-type, condenser type, inductance type, optical profile type etc.And the capacitive touch control techniques has durable, low cost and other advantages becomes the one preferred technique of touch-control gradually.
The induction mode of capacitance type touch control keys generally has two kinds, and a kind of is to judge position of touch according to the coordinate of judging touch point.Another kind of then be the mode of OD button, that is, the software (Firmware) of storage arranges a threshold values to equivalent capacity corresponding to each touch controlled key in the control chip, and each touch controlled key is distributed a control register.When this touch controlled key was touched, the appearance value of the equivalent capacity that this touch controlled key is corresponding can be higher than this threshold values, control register set corresponding to this touch controlled key this moment.Control chip scans each touch controlled key according to certain sweep frequency, reading corresponding control register, thereby judges the touch controlled key that specifically is touched.
In general, adopt OD button design can save port number, and for the design that antenna is placed on the lower end, 0D button design can farthest reduce touch-screen to the impact of antenna performance.Therefore be placed on the mobile phone lower end for antenna, again more on the lower the design of Touch control key position, OD button is a kind of reasonable selection mode.
Yet adopting the major defect of the touch controlled key of OD button touch control manner is that antijamming capability is relatively poor, and the appearance value of its equivalent capacity is subject to the touch controlled key interference of other signals on every side easily, such as the display screen signal of electronic installation, and antenna receiving-sending signal etc.After touch controlled key was disturbed by other signals, it is constant that its equivalent capacity can maintain a larger capacitance, thus so that the touch controllable function of touch controlled key inefficacy.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides the stronger capacitive touch device of a kind of antijamming capability.
According to a kind of capacitive touch device provided by the invention, the touch control controller that comprises capacitance type touch control keys and be electrically connected to this capacitance type touch control keys, described capacitance type touch control keys comprises an equivalent electric capacity, described touch control controller is used for obtaining the actual appearance value of this equivalence electric capacity, judge that whether this actual appearance value is greater than a default maximum appearance value, and when this actual appearance value during greater than this maximum appearance value, this equivalence electric capacity is forced calibration.
Further, described touch control controller also is used for when judging this actual appearance value less than this maximum appearance value, continue to judge that whether this actual appearance value is greater than a default threshold values, when this actual appearance value during greater than this threshold values and less than this maximum appearance value, described control controller triggers function corresponding to this capacitance type touch control keys.
Further, described touch control controller scans this equivalence electric capacity according to a default sweep frequency, thereby constantly obtains the actual appearance value of this equivalence electric capacity.
According to a kind of touch control controller provided by the invention, be electrically connected to a capacitance type touch control keys, described touch control controller comprises the scan module be used to the actual appearance value of the equivalent capacity of obtaining this capacitance type touch control keys; Be used for judging that this actual appearance value is whether greater than the judge module of a maximum appearance value of presetting; And be used in this actual appearance value during greater than this default maximum appearance value, this equivalence electric capacity is forced the calibration module of calibrating.
Further, described judge module also is used for during less than this maximum appearance value, judging that whether this actual appearance value is greater than a default threshold values in this actual appearance value.
Further, described touch control controller also comprises execution module, and when described actual appearance value during greater than this default threshold values and less than this maximum appearance value, described execution module triggers function corresponding to this capacitance type touch control keys.
Further, described scan module scans this equivalence electric capacity according to a default sweep frequency, thereby constantly obtains the actual appearance value of this equivalence electric capacity.
Further, described touch control controller also comprises module is set, and described the sweep frequency that module is used for arranging this maximum appearance value, this threshold values and this scan module is set.
Further, described touch control controller also comprises memory module, and this memory module is for the sweep frequency of storing described maximum appearance value, threshold values and scan module.
According to a kind of touch-control recognition methods provided by the invention, the method comprises the steps: to obtain the actual appearance value of the equivalent capacity of this capacitance type touch control keys; Judge that whether this actual appearance value is greater than a default maximum appearance value; And during greater than this default maximum appearance value, this equivalence electric capacity is forced calibration in this actual appearance value.
Further, the method also comprises when this actual appearance value during less than this maximum appearance value, judges that this actual appearance value is whether greater than the step of a default threshold values.
Further, the method also comprises when described actual appearance value during greater than this default threshold values and less than this maximum appearance value, triggers the step of function corresponding to this capacitance type touch control keys.
Compared to prior art, capacitive touch device of the present invention, touch control controller and touch-control recognition methods pass through to judge that whether the actual capacitance value of this touch controlled key is greater than a default maximum appearance value, when this actual capacitance value during greater than this default maximum appearance value, then the equivalent capacity of this capacitance type touch control keys is forced calibration, thereby can eliminate other undesired signals to the interference of capacitance type touch control keys, improve antijamming capability.
Description of drawings
Fig. 1 is the functional block diagram of the capacitive touch device of preferred embodiments of the present invention;
Fig. 2 is the synoptic diagram of the capacitance type touch control keys of capacitive touch device shown in Figure 1;
Fig. 3 is the process flow diagram of the touch-control recognition methods of preferred embodiments of the present invention.
Embodiment
The present invention is further described below in conjunction with description of drawings and embodiment.
See also Fig. 1 and Fig. 2, the capacitive touch device 10 of preferred embodiments of the present invention is applicable in the electronic installations such as mobile phone or panel computer, and it comprises that at least one capacitance type touch control keys 11 and at least one are electrically connected at the touch control controller 13 of these capacitance type touch control keys 11.
Each capacitance type touch control keys 11 corresponding equivalent electric capacity.This capacitance type touch control keys 11 comprises contact panel 111, emission layer TX and receiving layer RX.Emission layer TX and receiving layer RX consist of this equivalence electric capacity.According to the universal principle of capacitance touching control operation, after contact panel 111 was by finger touch, deformation occured and also causes the appearance value of this equivalence electric capacity to change in its part.
As mentioned above, when judge module 133 judges that capacitance type touch control keys 11 has been subject to the interference of outer signals, 135 equivalent capacitys to this capacitance type touch control keys 11 of calibration module are forced calibration (for example will be judged as the equivalent capacity appearance value that is caused by undesired signal and change zero clearing), make the appearance value of described equivalent capacity return within the predetermined normal range when not being touched (for example be returned to contact panel 111 capacitor's capacity), to eliminate the impact of undesired signal.
And as actual appearance value N during less than this maximum appearance value M, then judge module 133 is used for also judging that whether this actual appearance value N is greater than a threshold values F who presets.As this actual appearance value N during greater than this threshold values F, then explanation capacitance type touch control keys 11 this moment has been subject to the correct touching of user's finger, 136 functions that trigger these capacitance type touch control keys 11 correspondences of execution module this moment.That is to say to only have when this actual appearance value N is between this threshold values F and maximum appearance value M, illustrate that just this capacitance type touch control keys 11 is correctly touched.
If judge module 135 is judged this actual appearance value N less than this threshold values F, then explanation this moment, capacitance type touch control keys 11 was touched or correctly do not touched, and 13 of touch control controllers are not made any reaction.
The described module 137 that arranges can be the data input devices such as existing operation interface, is used for arranging the sweep frequency of this maximum appearance value M, this threshold values F and scan module 131.
Be appreciated that above-mentioned scan module 131 and judge module 133 also can be incorporated among the CPU of the electronic installation that uses this capacitive touch device 10.
See also Fig. 3, the touch-control recognition methods of preferred embodiments of the present invention comprises the steps:
Step S1: use scan module 131 with a default frequency capacitance type touch control keys 11 to be scanned, with the actual appearance value N of the equivalent capacity of obtaining this capacitance type touch control keys 11.
Step S2: use judge module 133 to judge that whether this actual appearance value N is greater than a default maximum appearance value M.If, execution in step S3 then; Otherwise execution in step S4.
Step S3: use 135 pairs of calibration modules to force calibration by equivalence electric capacity.Return step S1.
Step S4: use judge module 133 to judge that whether this actual appearance value N is greater than a default threshold values F.If, execution in step S5 then, otherwise return step S1.
Step S5: use module 136 to trigger the function of these capacitance type touch control keys 11 correspondences, return simultaneously step S1.
Described capacitive touch device 10, touch control controller 11 and touch-control recognition methods pass through to judge that whether the actual capacitance value N of this touch controlled key is greater than a default maximum appearance value M.As this actual capacitance value N during greater than this default maximum appearance value M, then the equivalent capacity of this capacitance type touch control keys 11 is forced calibration.Can effectively eliminate like this other undesired signals to the interference of capacitance type touch control keys 11, improve antijamming capability.
Above content is the further description of the present invention being done in conjunction with concrete preferred implementation, can not assert that implementation of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. capacitive touch device, the touch control controller that comprises capacitance type touch control keys and be electrically connected to this capacitance type touch control keys, described capacitance type touch control keys comprises an equivalent electric capacity, it is characterized in that: described touch control controller is used for obtaining the actual appearance value of this equivalence electric capacity, judge that whether this actual appearance value is greater than a default maximum appearance value, and when this actual appearance value during greater than this maximum appearance value, this equivalence electric capacity is forced calibration.
2. capacitive touch device according to claim 1, it is characterized in that: described touch control controller also is used for when judging this actual appearance value less than this maximum appearance value, continue to judge that whether this actual appearance value is greater than a default threshold values, when this actual appearance value during greater than this threshold values and less than this maximum appearance value, described control controller triggers function corresponding to this capacitance type touch control keys, described touch control controller scans this equivalence electric capacity according to a default sweep frequency, thereby constantly obtains the actual appearance value of this equivalence electric capacity.
3. a touch control controller is electrically connected to a capacitance type touch control keys, it is characterized in that, described touch control controller comprises:
Scan module is for the actual appearance value of the equivalent capacity of obtaining this capacitance type touch control keys;
Judge module is used for judging that whether this actual appearance value is greater than a default maximum appearance value; And
Calibration module is used for during greater than this default maximum appearance value, this equivalence electric capacity being forced calibration in this actual appearance value.
4. touch control controller according to claim 3, it is characterized in that: described judge module also is used in this actual appearance value during less than this maximum appearance value, judge that whether this actual appearance value is greater than a default threshold values, described scan module scans this equivalence electric capacity according to a default sweep frequency, thereby constantly obtains the actual appearance value of this equivalence electric capacity.
5. touch control controller according to claim 4, it is characterized in that: described touch control controller also comprises execution module, when described actual appearance value during greater than this default threshold values and less than this maximum appearance value, described execution module triggers function corresponding to this capacitance type touch control keys.
6. touch control controller according to claim 5 is characterized in that: described touch control controller also comprises module is set, and described the sweep frequency that module is used for arranging this maximum appearance value, this threshold values and this scan module is set.
7. touch control controller according to claim 5, it is characterized in that: described touch control controller also comprises memory module, this memory module is used for the sweep frequency of storing described maximum appearance value, threshold values and scan module.
8. a touch-control recognition methods is characterized in that, comprises the steps:
Obtain the actual appearance value of the equivalent capacity of this capacitance type touch control keys;
Judge that whether this actual appearance value is greater than a default maximum appearance value; And
During greater than this default maximum appearance value, this equivalence electric capacity is forced calibration in this actual appearance value.
9. touch-control recognition methods according to claim 8 is characterized in that: the method also comprises when this actual appearance value during less than this maximum appearance value, judges that this actual appearance value is whether greater than the step of a default threshold values.
10. touch-control recognition methods according to claim 9 is characterized in that: the method also comprises when described actual appearance value during greater than this default threshold values and less than this maximum appearance value, triggers the step of function corresponding to this capacitance type touch control keys.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210528809.2A CN103019488B (en) | 2012-12-10 | 2012-12-10 | Capacitive touch device, touch control controller and touch control identification method |
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| CN201210528809.2A CN103019488B (en) | 2012-12-10 | 2012-12-10 | Capacitive touch device, touch control controller and touch control identification method |
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| Publication Number | Publication Date |
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| CN103019488A true CN103019488A (en) | 2013-04-03 |
| CN103019488B CN103019488B (en) | 2016-03-30 |
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| CN201210528809.2A Expired - Fee Related CN103019488B (en) | 2012-12-10 | 2012-12-10 | Capacitive touch device, touch control controller and touch control identification method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103279243A (en) * | 2013-06-06 | 2013-09-04 | 东莞博用电子科技有限公司 | Adjacent key suppression method of capacitive touch keys |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102053764B (en) * | 2009-11-10 | 2012-12-19 | 深圳市汇顶科技有限公司 | Anti-interference method and system as well as capacitive touch sensor |
| JP2011170617A (en) * | 2010-02-18 | 2011-09-01 | On Semiconductor Trading Ltd | Electrostatic capacity type touch sensor |
| CN102520819A (en) * | 2011-11-25 | 2012-06-27 | 苏州瀚瑞微电子有限公司 | Automatic calibration method of single-layer ITO (indium tin oxide) |
| CN102662540B (en) * | 2012-03-23 | 2015-03-11 | 旭曜科技股份有限公司 | Driving frequency selection method for capacitive multipoint touch system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103279243A (en) * | 2013-06-06 | 2013-09-04 | 东莞博用电子科技有限公司 | Adjacent key suppression method of capacitive touch keys |
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| CN103019488B (en) | 2016-03-30 |
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Address after: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Patentee after: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS Corp.,Ltd. Address before: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Patentee before: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS Corp.,Ltd. |
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Granted publication date: 20160330 |