CN103019488B - Capacitive touch device, touch control controller and touch control identification method - Google Patents
Capacitive touch device, touch control controller and touch control identification method Download PDFInfo
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- CN103019488B CN103019488B CN201210528809.2A CN201210528809A CN103019488B CN 103019488 B CN103019488 B CN 103019488B CN 201210528809 A CN201210528809 A CN 201210528809A CN 103019488 B CN103019488 B CN 103019488B
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000006870 function Effects 0.000 claims description 12
- 238000009434 installation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000005055 memory storage Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Abstract
The invention provides a kind of capacitive touch device, touch control controller and touch control identification method, described capacitive touch device, comprise capacitance type touch control keys and be electrically connected to the touch control controller of this capacitance type touch control keys, described capacitance type touch control keys comprises an equivalent capacity, described touch control controller is for obtaining the actual capacitance of this equivalent capacity, judge whether this actual capacitance is greater than a maximum capacitance preset, and when this actual capacitance is greater than this maximum capacitance, pressure calibration is carried out to this equivalent capacity.Described capacitive touch device can eliminate the interference of other undesired signals to capacitance type touch control keys, improves antijamming capability.The present invention also provides a kind of touch control controller and touch control identification method.
Description
Technical field
The present invention relates to touch-control field, especially relate to a kind of capacitive touch device, touch control controller and touch control identification method.
Background technology
Due to the progress of science and technology, touch technology is generally applied on many devices, as touch screen and touch controlled key have become the most important application technology of the portable electron devices such as current mobile phone, and touch-control sensing mode has resistance-type, condenser type, inductance type, optical profile type etc.And capacitive touch control techniques has durable, low cost and other advantages, become 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 according to judging that the coordinate of touch point judges position of touch.Another kind of then be the mode of ODbutton, that is, the equivalent capacity that the software (Firmware) stored in control chip is corresponding to each touch controlled key arranges a threshold values, and distributes a control register to each touch controlled key.When this touch controlled key is touched, the capacitance of the equivalent capacity that this touch controlled key is corresponding can higher than this threshold values, the control register set that now this touch controlled key is corresponding.Control chip scans each touch controlled key according to certain sweep frequency, to read corresponding control register, thus the touch controlled key that judgement is specifically touched.
In general, adopt ODbutton design to save port number, and for antenna being placed on the design of lower end, 0Dbutton design farthest can reduce the impact of touch-screen on antenna performance.Therefore be placed on mobile phone lower end for antenna, the design more on the lower again of Touch control key position, ODbutton is a kind of reasonable selection mode.
But the major defect adopting the touch controlled key of ODbutton touch control manner is that antijamming capability is poor, and the capacitance of its equivalent capacity is easily subject to the interference of other signals around touch controlled key, as the display screen signal of electronic installation, antenna receiving and transmitting signal etc.After touch controlled key is by other signal disturbing, it is constant that its equivalent capacity can maintain a larger capacitance, thus the touch controllable function of touch controlled key was lost efficacy.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides the capacitive touch device that a kind of antijamming capability is stronger.
According to a kind of capacitive touch device provided by the invention, comprise capacitance type touch control keys and be electrically connected to the touch control controller of this capacitance type touch control keys, described capacitance type touch control keys comprises an equivalent capacity, described touch control controller is for obtaining the actual capacitance of this equivalent capacity, judge whether this actual capacitance is greater than a maximum capacitance preset, and when this actual capacitance is greater than this maximum capacitance, pressure calibration is carried out to this equivalent capacity.
Further, described touch control controller is also for when judging that this actual capacitance is less than this maximum capacitance, continue to judge whether this actual capacitance is greater than a threshold values preset, when this actual capacitance is greater than this threshold values and is less than this maximum capacitance, described control controller triggers function corresponding to this capacitance type touch control keys.
Further, described touch control controller scans this equivalent capacity according to the sweep frequency that presets, thus constantly obtains the actual capacitance of this equivalent 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 of the actual capacitance of the equivalent capacity for obtaining this capacitance type touch control keys; For judging whether this actual capacitance is greater than the judge module of the maximum capacitance that presets; And during for being greater than this default maximum capacitance in this actual capacitance, the calibration module forcing calibration is carried out to this equivalent capacity.
Further, described judge module, also for when this actual capacitance is less than this maximum capacitance, judges whether this actual capacitance is greater than a threshold values preset.
Further, described touch control controller also comprises execution module, and when described actual capacitance is greater than this threshold values preset and is less than this maximum capacitance, described execution module triggers function corresponding to this capacitance type touch control keys.
Further, described scan module scans this equivalent capacity according to the sweep frequency that presets, thus constantly obtains the actual capacitance of this equivalent capacity.
Further, described touch control controller also comprises and arranges module, and the described module that arranges is for arranging the sweep frequency of this maximum capacitance, this threshold values and this scan module.
Further, described touch control controller also comprises memory module, and this memory module is for storing the sweep frequency of described maximum capacitance, threshold values and scan module.
According to a kind of touch control identification method provided by the invention, the method comprises the steps: the actual capacitance of the equivalent capacity obtaining this capacitance type touch control keys; Judge whether this actual capacitance is greater than a maximum capacitance preset; And when this actual capacitance is greater than this default maximum capacitance, pressure calibration is carried out to this equivalent capacity.
Further, the method also comprises when this actual capacitance is less than this maximum capacitance, judges whether this actual capacitance is greater than the step of the threshold values that presets.
Further, the method also comprises when described actual capacitance is greater than this threshold values preset and is less than this maximum capacitance, 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 identification method are by judging whether the actual capacitance value of this touch controlled key is greater than a maximum capacitance preset, when this actual capacitance value is greater than this default maximum capacitance, then pressure calibration is carried out to the equivalent capacity of this capacitance type touch control keys, thus the interference of other undesired signals to capacitance type touch control keys can be eliminated, improve antijamming capability.
Accompanying drawing explanation
Fig. 1 is the functional block diagram of the capacitive touch device of better embodiment of the present invention;
Fig. 2 is the schematic diagram of the capacitance type touch control keys of capacitive touch device shown in Fig. 1;
Fig. 3 is the process flow diagram of the touch control identification method of better embodiment of the present invention.
Embodiment
Illustrate below in conjunction with accompanying drawing and embodiment the present invention is further described.
Refer to Fig. 1 and Fig. 2, the capacitive touch device 10 of better embodiment of the present invention is applicable in the electronic installation such as mobile phone or panel computer, and it comprises at least one capacitance type touch control keys 11 and at least one is electrically connected at the touch control controller 13 of these capacitance type touch control keys 11.
The corresponding equivalent capacity of each capacitance type touch control keys 11.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 forms this equivalent capacity.According to the universal principle of capacitance touching control operation, after contact panel 111 is by finger touch, there is deformation and cause the capacitance of this equivalent capacity to change in its part.
Touch control controller 13 comprises scan module 131, judge module 133, calibration module 135, execution module 136, arranges module 137 and memory module 139.
Scan module 131 can be the general integrated circuit with capacitor's capacity measurement function, scans, thus constantly obtain the actual capacitance N of this equivalent capacity for the sweep frequency preset with to capacitance type touch control keys 11.
Judge module 133 can be the general integrated circuit with calculation function, for judging whether this actual capacitance N is greater than a maximum capacitance M preset.If this actual capacitance N is greater than this maximum capacitance M, then show that now capacitance type touch control keys 11 may create the deformation outside NL, now this judge module 133 judges that capacitance type touch control keys 11 receives the interference of outer signals accordingly.
Calibration module 135 and execution module 136 can serve as by using the central processing unit (centralprocessingunit, CPU) of the electronic installation of this capacitive touch device 10, have data and instruction processing function that most of CPU possesses.
As mentioned above, when judge module 133 judges that capacitance type touch control keys 11 receives the interference of outer signals, calibration module 135 equivalent capacitys to this capacitance type touch control keys 11 carry out forcing calibration (such as resetting being judged as the equivalent capacity capacitance change caused by undesired signal), the capacitance of described equivalent capacity is returned within predetermined normal range and (is such as returned to capacitor's capacity when contact panel 111 is not touched), to eliminate the impact of undesired signal.
And when actual capacitance N is less than this maximum capacitance M, then judge module 133 is also for judging whether this actual capacitance N is greater than a threshold values F preset.When this actual capacitance N is greater than this threshold values F, then illustrate that now capacitance type touch control keys 11 receives the correct touching of user's finger, now execution module 136 triggers the function of this capacitance type touch control keys 11 correspondence.That is, only have when this actual capacitance N is between this threshold values F and maximum capacitance M, just illustrate that this capacitance type touch control keys 11 is correctly touched.
If judge module 135 judges that this actual capacitance N is less than this threshold values F, then illustrate that now capacitance type touch control keys 11 is touched or correctly do not touched, touch control controller 13 does not make any reaction.
The described module 137 that arranges can be the data input devices such as existing operation interface, for arranging the sweep frequency of this maximum capacitance M, this threshold values F and scan module 131.
Memory module 139 can be existing memory storage, for storing by the sweep frequency arranging maximum capacitance M, this threshold values F and scan module 131 that module 137 sets.
Be appreciated that above-mentioned scan module 131 also can be incorporated in the CPU of the electronic installation using this capacitive touch device 10 with judge module 133.
Refer to Fig. 3, the touch control identification method of better embodiment of the present invention comprises the steps:
Step S1: use scan module 131 to scan capacitance type touch control keys 11 with the frequency that presets, to obtain the actual capacitance N of the equivalent capacity of this capacitance type touch control keys 11.
Step S2: whether this actual capacitance N is greater than a maximum capacitance M preset to use judge module 133 to judge.If so, then step S3 is performed; Otherwise perform step S4.
Step S3: use calibration module 135 to carry out pressure calibration to this equivalent capacity.Return step S1.
Step S4: whether this actual capacitance N is greater than a threshold values F preset to use judge module 133 to judge.If so, then perform step S5, otherwise return step S1.
Step S5: use module 136 to trigger the function of this capacitance type touch control keys 11 correspondence, return step S1 simultaneously.
Described capacitive touch device 10, touch control controller 11 and touch control identification method are by judging whether the actual capacitance value N of this touch controlled key is greater than a maximum capacitance M preset.When this actual capacitance value N is greater than this default maximum capacitance M, then pressure calibration is carried out to the equivalent capacity of this capacitance type touch control keys 11.Effectively can eliminate the interference of other undesired signals to capacitance type touch control keys 11 like this, improve antijamming capability.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (3)
1. a capacitive touch device, comprise capacitance type touch control keys and be electrically connected to the touch control controller of this capacitance type touch control keys, described capacitance type touch control keys comprises an equivalent capacity, it is characterized in that: described touch control controller is for obtaining the actual capacitance of this equivalent capacity, judge whether this actual capacitance is greater than a maximum capacitance preset, and when this actual capacitance is greater than this maximum capacitance, resetting being judged as the equivalent capacity capacitance change caused by undesired signal, making the capacitance of equivalent capacity return within predetermined normal range;
Described touch control controller is also for when judging that this actual capacitance is less than this maximum capacitance, continue to judge whether this actual capacitance is greater than a threshold values preset, when this actual capacitance is greater than this threshold values and is less than this maximum capacitance, described control controller triggers function corresponding to this capacitance type touch control keys, described touch control controller scans this equivalent capacity according to the sweep frequency that presets, thus constantly obtains the actual capacitance of this equivalent capacity.
2. 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, for obtaining the actual capacitance of the equivalent capacity of this capacitance type touch control keys;
Judge module, for judging whether this actual capacitance is greater than a maximum capacitance preset; And
Calibration module, during for being greater than this default maximum capacitance in this actual capacitance, will being judged as the equivalent capacity capacitance change caused by undesired signal and resetting, and make the capacitance of equivalent capacity return within predetermined normal range;
Described judge module is also for when this actual capacitance is less than this maximum capacitance, judge whether this actual capacitance is greater than a threshold values preset, described scan module scans this equivalent capacity according to the sweep frequency that presets, thus constantly obtains the actual capacitance of this equivalent capacity;
Described touch control controller also comprises execution module, and when described actual capacitance is greater than this threshold values preset and is less than this maximum capacitance, described execution module triggers function corresponding to this capacitance type touch control keys;
Described touch control controller also comprises and arranges module, and the described module that arranges is for arranging the sweep frequency of this maximum capacitance, this threshold values and this scan module;
Described touch control controller also comprises memory module, and this memory module is for storing the sweep frequency of described maximum capacitance, threshold values and scan module.
3. a touch control identification method, is characterized in that, comprises the steps:
Obtain the actual capacitance of the equivalent capacity of capacitance type touch control keys;
Judge whether this actual capacitance is greater than a maximum capacitance preset; And
When this actual capacitance is greater than this default maximum capacitance, the equivalent capacity capacitance change caused by undesired signal will be judged as and reset, and make the capacitance of equivalent capacity return within predetermined normal range;
The method also comprises when this actual capacitance is less than this maximum capacitance, judges whether this actual capacitance is greater than the step of the threshold values that presets;
The method also comprises when described actual capacitance is greater than this threshold values preset and is less than this maximum capacitance, triggers the step of function corresponding to this capacitance type touch control keys.
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| Application Number | Priority Date | Filing Date | Title |
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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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| 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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| CN103019488A CN103019488A (en) | 2013-04-03 |
| CN103019488B true CN103019488B (en) | 2016-03-30 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102053764A (en) * | 2009-11-10 | 2011-05-11 | 深圳市汇顶科技有限公司 | Anti-interference method and system as well as capacitive touch sensor |
| CN102169400A (en) * | 2010-02-18 | 2011-08-31 | 安森美半导体贸易公司 | 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) |
| CN102662540A (en) * | 2012-03-23 | 2012-09-12 | 旭曜科技股份有限公司 | Driving frequency selection method for capacitive multipoint touch system |
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- 2012-12-10 CN CN201210528809.2A patent/CN103019488B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102053764A (en) * | 2009-11-10 | 2011-05-11 | 深圳市汇顶科技有限公司 | Anti-interference method and system as well as capacitive touch sensor |
| CN102169400A (en) * | 2010-02-18 | 2011-08-31 | 安森美半导体贸易公司 | 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) |
| CN102662540A (en) * | 2012-03-23 | 2012-09-12 | 旭曜科技股份有限公司 | Driving frequency selection method for capacitive multipoint touch system |
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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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