CN105630256A - Key touch identification method of capacitive touch screen - Google Patents
Key touch identification method of capacitive touch screen Download PDFInfo
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- CN105630256A CN105630256A CN201410625496.1A CN201410625496A CN105630256A CN 105630256 A CN105630256 A CN 105630256A CN 201410625496 A CN201410625496 A CN 201410625496A CN 105630256 A CN105630256 A CN 105630256A
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Abstract
The invention discloses a key touch identification method of a capacitive touch screen. The capacitive touch screen comprises two touch membranes, wherein one touch membrane is provided with a plurality of emission stimulation electrodes, the other touch membrane is provided with a plurality of receiving electrodes, two touch membranes are mutually overlapped to form a plurality of induction units, and the plurality of induction units are arranged in a net shape. The method comprises the following steps: at a certain time interval, collecting the capacitance value of each induction unit, judging whether the capacitance value is greater than a set value or not, and judging the cause as water interference if the capacitance value is smaller than the set value; if the capacitance value is greater than the set value, further judging whether the induction units which generate the capacitance values are adjacent or not; if the induction units which generate the capacitance values are not adjacent, judging the cause as the water interference, and further judging whether the induction units which generate the capacitance form a sealed induction area if the induction units which generate the capacitance values are adjacent; and if the sealed induction area is formed, judging the cause as a key operation, and judging the cause as the water interference if the sealed induction area is not formed. The key touch identification method of the capacitive touch screen is simple in operation and can effectively identify the operation of the capacitive key touch.
Description
Technical field
The present invention relates to capacitive touch screen technology, the touch key-press recognition methods of especially a kind of capacitive touch screen.
Background technology
In prior art, the scheme that the scan mode of touch screen is generally adopted is respectively the row and column of capacitance matrix to be scanned. When the row or column of touch screen capacitance matrix is scanned, scan two row or two row every time simultaneously, obtain the capacitive differential of two rows or two columns. Such as, by wherein a line is as reference edge, adjacent a line, as scanning end, thus obtains the capacitance difference between this two row, the like. The scan efficiency of this scan mode is higher, and error is less. But when water droplet drops on screen, the water droplet position of touch screen being caused capacitive differential occur, cause being mistaken for button operation, therefore this touch screen scan mode is not good in water proofing property and other interference free performances.
Therefore, it is necessary to design the touch key-press recognition methods of a kind of waterproof capacitive touch screen, this method can effectively identify that effectively pressing touches and water interference, improves susceptiveness and the accuracy of touch screen.
Summary of the invention
In view of this, it is an object of the invention to provide a kind of simple in construction, effectively identify the touch key-press recognition methods of the capacitive touch screen of water interference.
In order to solve above-mentioned technical problem, the touch key-press recognition methods of capacitive touch screen provided by the invention, including two-layer touch control film, wherein one layer of touch control film arranges a plurality of transmitting exciting electrode, another layer of touch control film is arranged a plurality of reception electrode, touch control film described in two-layer is overlapped mutually the multiple sensing units of formation, and multiple described sensing units are meshy arrangement, and described method includes:
Separated in time gathers the capacitance of described sensing unit, and judges that whether described capacitance is more than setting value, if less than setting value, is then judged as that water disturbs; If more than setting value, then whether adjacent determining whether between the described sensing unit of generation electric capacity; If non-conterminous, then it is judged as that water disturbs, if adjacent, then determines whether whether the described sensing unit of generation electric capacity forms the induction region of closed; If forming the induction region of closed, then it is judged as button operation, if not closed, is then judged as that water disturbs.
Further, touch control film described in two-layer is hyaline membrane.
Further, the described touch control film that two-layer is transparent is flexible touch control film.
Further, the flexible described transparent touch film of two-layer is Graphene flexibility touch control film.
Further, a plurality of described transmitting exciting electrode is arranged in parallel between any two and spacing is identical, and a plurality of described reception electrode is also arranged in parallel between any two and spacing is identical.
Further, each described sensing unit spacing is identical with area.
Further, the interval time of described collection sensing unit capacitance is 2ms-10ms.
Adopt technique scheme, have the advantages that
The touch key-press recognition methods of capacitive touch screen provided by the invention, owing to adopting a plurality of transmitting exciting electrode and a plurality of reception electrode to be overlapped mutually the netted sensing unit of formation, and the capacitance of separated in time scanning sensing unit, arrange corresponding recognizer to be identified this capacitance judging, whether the main sensing unit that whether sensing unit is adjacent and these are adjacent from the size of capacitance, generation electric capacity closes these angles judges, and then other interference operation such as key range operation or water interference. The touch key-press recognition methods of capacitive touch screen provided by the invention, simple to operate, can effectively realize identifying capacitance touch button operation.
Accompanying drawing explanation
Fig. 1 be capacitive touch screen in one embodiment of the invention touch key-press recognition methods in touch screen launch exciting electrode with reception electrode superpose after schematic diagram;
Fig. 2 be capacitive touch screen in one embodiment of the invention touch key-press recognition methods in launch the schematic diagram of exciting electrode;
Fig. 3 be capacitive touch screen in one embodiment of the invention touch key-press recognition methods in receive the schematic diagram of electrode;
Fig. 4 be capacitive touch screen in one embodiment of the invention touch key-press recognition methods in button operation time sensing unit produce capacitance schematic diagram;
Fig. 5 be capacitive touch screen in one embodiment of the invention touch key-press recognition methods in water interference time sensing unit produce capacitance schematic diagram;
Fig. 6 is the logic control schematic diagram in the touch key-press recognition methods of capacitive touch screen in one embodiment of the invention.
Accompanying drawing labelling synopsis:
1-launches exciting electrode; 2-receives electrode; 3-sensing unit.
Detailed description of the invention
The specific embodiment of the present invention is further illustrated below in conjunction with accompanying drawing. It should be noted that, the word "front", "rear" of use is described below, direction that "left", "right", "up" and "down" refer in accompanying drawing, word " interior " and " outward " refer respectively to the direction towards or away from particular elements geometric center.
As shown in Figure 1, Figure 2, shown in Fig. 3 and Fig. 6, touch key-press recognition methods according to one embodiment of the invention capacitive touch screen, including two-layer touch control film, wherein one layer of touch control film arranges a plurality of transmitting exciting electrode 1, another layer of touch control film is arranged a plurality of reception electrode 2, two-layer touch control film is overlapped mutually the multiple sensing units 3 of formation, multiple sensing units 3 are in meshy arrangement, described method includes: separated in time gathers the capacitance of sensing unit 3, and judge that whether capacitance 3 is more than setting value, if less than setting value, then it is judged as that water disturbs. If more than setting value, then whether adjacent determining whether between the sensing unit 3 of generation electric capacity, if non-conterminous, being then judged as that water disturbs, if adjacent, then determine whether whether the sensing unit 3 of generation electric capacity forms the induction region of closed. If forming the induction region of closed, then it is judged as button operation, if not closed, is then judged as that water disturbs.
Adopting two-layer touch control film, wherein arrange on one layer of touch control film and launch exciting electrode 1, another layer of touch control film being arranged and receives electrode 2, this two-layer touch control film is overlapped mutually, and forms multiple sensing unit 3, and multiple sensing unit 3 is in meshy arrangement. When external object touches touch control film, for instance, finger or water droplet, can draw the capacitance variations of touch control film and external object touching position, i.e. the capacitance variations of sensing unit 3. Between gather the capacitance of sensing unit 3 at regular intervals, and judge whether this capacitance is button operation or water interference according to default program.
The determining program preset is concrete it may be that first judge whether to sense interval capacitance more than setting value, if less than setting value, is then judged as that water disturbs.
Setting value and threshold value, determined by the thickness of touch panel and dielectric constant, and with sensitivity positive correlation. Threshold value is more little, and sensitivity is more high, but anti-interference more poor; Threshold value is more big, and sensitivity is more low, but anti-interference more strong. Therefore, different touch panel devices, according to the setting value that the thickness of touch panel and dielectric constant are determined.
As shown in Figure 4 and Figure 5, wherein, in figure, " 0 " represents this sensing unit 3 and does not produce inductance capacitance, and namely this sensing unit 3 does not contact with outside. Figure exists the sensing unit 3 of concrete numerical value, represents that these sensing units 3 contact with outside, and create the inductance capacitance of this numerical values recited. Numerical value in figure is not offered as the specific size value of sensing unit 3 inductance capacitance, and is a relative amount, it is simple to illustrate that water interference is different from button operation. Such as, when setting value determine 150 to identify touch key-press or water interference time, in Figure 5, on sensing unit 3 produce capacitance only have 8-98, much smaller than setting value 150, thus can be determined directly as water interference.
When capacitance is more than 150, now determine whether that whether the sensing unit 3 producing electric capacity is adjacent, so-called adjacent, specifically refer at least have a common edge between the netted sensing unit 3 of any two generation inductance capacitance. As it is shown in figure 5, the upper left corner in sensing unit district, middle part has the capacitance 74 that a sensing unit 3 produces not have common edge with other sensing units 3 producing capacitance, therefore it is non-conterminous. If there is non-conterminous sensing unit 3, result in the irregularity boundary of the sensing unit of inductance capacitance, be then judged as that water disturbs. As shown in Figure 4, when normal button operation, the sensing unit 3 producing inductance capacitance is adjacent between two, and boundary profile is clear.
When being adjacent between the sensing unit 3 producing inductance capacitance, then determine whether whether the sensing unit 3 producing electric capacity forms closed. As it is shown in figure 5, touch control film creates two sensing concentration zones, place, and non-conterminous, it not closed state. Therefore it is judged as that water disturbs. As shown in Figure 4, touch control film only produces an inductance capacitance concentration zones, place, and in closed, is now finally judged as button operation.
Adopt above-mentioned recognition by pressing keys method, by multi-step, analyze sensing unit 3 concrete condition producing inductance capacitance on capacitive touch screen with multi-angle, the capacitance variations of the sensing unit 3 that the factors such as water interference cause can be got rid of exactly, finally realize the operation of effective key range.
In the present embodiment, the two-layer touch control film of capacitive touch screen is hyaline membrane. Why adopt transparent design, be to facilitate capacitive touch screen to be arranged on other objects, such as glass. And adopting transparent design, the sensing unit 3 making touch screen is elegant in appearance.
Above-mentioned transparent touch control film is flexible, deformation. Therefore, make touch control film be applicable to different profile panels, improve the scope of application of touch control film, facilitate the assembling of touch control film simultaneously.
Above-mentioned transparent touch control film can be specifically Graphene flexibility touch control film. Due to Graphene substantially a kind of transparent, good conductor, it is adapted to manufacture transparent touch-sensitive panel, and less costly.
In the present embodiment, as shown in Figure 1-Figure 3, launching exciting electrode 1 and the reception method specifically arranged of electrode 2 it may be that a plurality of transmitting exciting electrode 1 be arranged in parallel each other and spacing is identical, a plurality of reception electrode 2 is also be arranged in parallel each other and spacing is identical. The mode that transmitting exciting electrode 1 is overlapped mutually with reception electrode 2 can be mutually perpendicular to superpose, multiple sensing units 3 area and the shape of so launching exciting electrode 1 and receive formation after electrode 2 superposes are all identical, advantageously ensure that the faradism capacitance that each sensing unit 3 produces in situation of the same race is identical, it is provided that the accuracy of touch control film and susceptiveness. Certainly, launch exciting electrode 1 to be overlapped mutually mode can also non-perpendicular superpose with reception electrode 2, it is only necessary to ensure that each sensing unit spacing is identical with area.
In the present embodiment, as it is shown in figure 1, the quantity of sensing unit 3 and resolution positive correlation, the quantity of unit 3 is more many, then the resolution of touch screen is more high, and the reliability of identification is also more high.
In the present embodiment, the interval time gathering sensing unit 3 capacitance is 2ms-10ms. Acquisition time interval determines the response speed of touch screen key range operation. The interval time of 2ms-10ms, it is ensured that touch screen has response speed faster, improve the comfort of user. Interval time is determined by induction chip processing speed, and interval is more short, and button is more sensitive, and interval time can meet requirement less than 10ms, is generally adopted 6ms and can meet major part touch panel device requirement.
Above-described is only principles of the invention and preferred embodiment. It should be pointed out that, for the person of ordinary skill of the art, on the basis of the principle of the invention, it is also possible to make other modification some, also should be regarded as protection scope of the present invention.
Claims (7)
1. the touch key-press recognition methods of a capacitive touch screen, including two-layer touch control film, wherein one layer of touch control film arranges a plurality of transmitting exciting electrode, another layer of touch control film is arranged a plurality of reception electrode, touch control film described in two-layer is overlapped mutually the multiple sensing units of formation, multiple described sensing units are meshy arrangement, it is characterised in that described method includes:
Separated in time gathers the capacitance of described sensing unit, and judges that whether described capacitance is more than setting value, if less than setting value, is then judged as that water disturbs;
If more than setting value, then whether adjacent determining whether between the described sensing unit of generation electric capacity;
If non-conterminous, then it is judged as that water disturbs, if adjacent, then determines whether whether the described sensing unit of generation electric capacity forms the induction region of closed;
If forming the induction region of closed, then it is judged as button operation, if not closed, is then judged as that water disturbs.
2. the touch key-press recognition methods of capacitive touch screen according to claim 1, it is characterised in that touch control film described in two-layer is hyaline membrane.
3. the touch key-press recognition methods of capacitive touch screen according to claim 2, it is characterised in that the transparent described touch control film of two-layer is flexible touch control film.
4. the touch key-press recognition methods of capacitive touch screen according to claim 3, it is characterised in that the flexible described transparent touch film of two-layer is Graphene flexibility touch control film.
5. the touch key-press recognition methods of capacitive touch screen according to claim 1, it is characterized in that, a plurality of described transmitting exciting electrode is arranged in parallel between any two and spacing is identical, and a plurality of described reception electrode is also arranged in parallel between any two and spacing is identical.
6. the touch key-press recognition methods of capacitive touch screen according to claim 1, it is characterised in that each described sensing unit spacing is identical with area.
7. the touch key-press recognition methods of capacitive touch screen according to claim 1, it is characterised in that the interval time of described collection sensing unit capacitance is 2ms-10ms.
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| CN106445264A (en) * | 2016-08-31 | 2017-02-22 | 维沃移动通信有限公司 | Touch operation calibration method and mobile terminal |
| WO2019014822A1 (en) * | 2017-07-18 | 2019-01-24 | 深圳市汇顶科技股份有限公司 | Method, device and touch-control detection device for finger positioning on touchscreen in wet state |
| CN109525233A (en) * | 2017-09-19 | 2019-03-26 | 上海欧郡自动化科技有限公司 | A kind of self-service vending machine and its capacitance touch button device |
| CN110658975A (en) * | 2019-09-17 | 2020-01-07 | 华为技术有限公司 | Mobile terminal control method and device |
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| US20120050214A1 (en) * | 2010-08-24 | 2012-03-01 | Viktor Kremin | Reducing water influence on a touch-sensing device |
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| CN110658975B (en) * | 2019-09-17 | 2023-12-01 | 华为技术有限公司 | Mobile terminal control method and device |
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