CN109450426A - A method of it is realized using more induction electrodes and is touched every sky - Google Patents
A method of it is realized using more induction electrodes and is touched every sky Download PDFInfo
- Publication number
- CN109450426A CN109450426A CN201811284925.8A CN201811284925A CN109450426A CN 109450426 A CN109450426 A CN 109450426A CN 201811284925 A CN201811284925 A CN 201811284925A CN 109450426 A CN109450426 A CN 109450426A
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- Prior art keywords
- key
- electrode
- effective coverage
- induction
- sky
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/96—Touch switches
- H03K17/962—Capacitive touch switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/94—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00 characterised by the way in which the control signal is generated
- H03K2217/96—Touch switches
- H03K2217/9607—Capacitive touch switches
- H03K2217/960735—Capacitive touch switches characterised by circuit details
Abstract
The present invention provides a kind of methods realized using more induction electrodes and touched every sky, the described method includes: a. is dividing at least one key effective coverage and at least one key inactive area to a key on pcb board every empty touch, wherein, induction region is key effective coverage immediately below finger, and other is key inactive area；B. induction electrode is spread in key effective coverage and key inactive area；C. the electrode of key effective coverage and key inactive area in step b is grouped；D. after being grouped, according to hardware resource, same group of electrode is connected to the same or different detection mouth of capacitance touch detection unit；E. capacitance detecting data in step d are sent respectively to active electrode data processing unit and dispersing electrode data processing unit, carries out the judgement of key virtual value.
Description
Technical field
The present invention relates to touch-control fields.
Background technique
Traditional capacitance type touch key generallys use spring, conductive adhesive tape etc. as spatially extended medium.Spring or
The presence of person's conductive adhesive tape, so that electric field line integrated distribution, improves the sensitivity of detection.However, the presence of the devices such as spring,
It will increase installation and follow-up maintenance cost.
It is simple using the method for improving sensitivity at present, it can detecte the presence of the finger of certain distance, but certain
Space in, the electric field strength generated between finger and electrode is identical, lead to not position finger elaborate position, thus can only
It realizes close to induction, that is, the presence of hand in certain space can be detected, and can not specifically navigate to some point.
The distance for reducing detection can reduce the difficulty of precise positioning in certain situation.But due to generally there is LED on PCB
The plug-in units device such as lamp, lower hanging distance are unable to satisfy the demand of most of applications.
To invalid key area floor file can above weakening area induction field intensity, to further eliminate adjacent key
Influence.But when key be up and down arrangement when, due to the presence of palm shadow effect, cause press top key when, just under
The key of side can generate the variable quantity for being equivalent to finger down, to be triggered.It in production, often can only be using limitation key
The distance between or the method for key arrangement evade, have very big limitation to press-key structure.
Therefore, a kind of hanging touch key system of the high-performance that precise positioning may be implemented is needed.
Summary of the invention
The present invention proposes a kind of hanging touch scheme, without additional conducting medium, directlys adopt distinctive figure on PCB
As electrode, the detection of capacitor key is carried out using air as medium, saves the elements such as spring and installation maintenance cost.
In one embodiment, it is realized using more induction electrodes every the method that sky touches the present invention provides a kind of, it is special
Sign is, which comprises
A. at least one key effective coverage is divided to a key and at least one key is invalid on pcb board touching every sky
Region, wherein induction region is key effective coverage immediately below finger, and other is key inactive area；
B. induction electrode is spread in key effective coverage and key inactive area；
C. the electrode of key effective coverage and key inactive area in step b is grouped；
D. after being grouped, according to hardware resource, same group of electrode is connected to the same or different of capacitance touch detection unit
Detection mouth；
E. capacitance detecting data in step d are sent respectively to active electrode data processing unit and dispersing electrode data
Unit is managed, the judgement of key virtual value is carried out.
In one embodiment, at least one key effective coverage and extremely is divided to a key on pcb board touching every sky
A key inactive area includes: less
The intermediate region of the key is divided into a key effective coverage, the peripheral region of the intermediate region will be surrounded
Domain is divided into one or more key inactive areas.
In one embodiment, the key effective coverage is square, and there are four the key inactive areas, respectively position
In four sides of the effective coverage, each key inactive area is rectangle.
In one embodiment, the key effective coverage is circle, and there are four the key inactive areas, is located at
The surrounding of the effective coverage.
In one embodiment, described that the electrode of key effective coverage and key inactive area in step b is grouped
Include:
The key effective coverage is divided into one group, the key inactive area is divided into one group.
In one embodiment, described that the electrode of key effective coverage and key inactive area in step b is grouped
Include:
The key effective coverage is divided into one group, the key inactive area is divided into multiple groups, wherein the multiple groups
Number depends on the hardware resource.
In one embodiment, the mode of the key virtual value judgement is as follows:
The induction amount for enabling actual induction electrode is x1, the induction amount of invalid induction electrode be xp (p=2,3,4 ... n),
Middle n indicates (n-1)th invalid induction electrode, and enabling judgment condition is set C3, then:
C3=x1, x2, x3, x4 ... xn | x1>GA1, x2<GA2, x3<GA3, x4<GA4 ..., xn<GAn }, wherein GA1
~GAn is the threshold condition of each electrode.
The present invention also provides a kind of key system, the key system includes multiple rows of key group, and every row's key group includes
One or more keys, wherein the induction mode of each key is using real using more induction electrodes as described in claim 1
The method now touched every sky.
Hanging touch scheme of the invention uses specific induction electrode, can effectively solve the influence of shadow effect, and real
The precise positioning of existing finger key.By optimizing to PCB top electrode figure, the present invention can be with active balance sensitivity and mistake
The problem of triggering, and due to the spacing and the not stringent limitation of structure to key, the present invention may be implemented more to uphang Ullage from
Touch effect.
Detailed description of the invention
The above summary of the invention of the invention and following specific embodiment can obtain more preferably when reading in conjunction with the drawings
Understanding.It should be noted that attached drawing is only used as the example of claimed invention.In the accompanying drawings, identical appended drawing reference
Represent same or similar element.
Fig. 1 shows the capacitor schematic diagram of traditional single electrode.
Fig. 2 shows multi-electrode schematic diagrames according to an embodiment of the invention.
Fig. 3 shows shadow effect exemplary diagram.
Fig. 4 shows key arrangement schematic diagram according to an embodiment of the invention.
Fig. 5 shows key arrangement schematic diagram according to an embodiment of the invention.
Fig. 6 shows a variety of key arrangement schematic diagrames according to the present invention.
Fig. 7 shows the button design example according to an embodiment of the invention for covering effective coverage and inactive area.
Fig. 8 shows the key decision system according to an embodiment of the invention realized using multi-electrode and touched every sky.
Specific embodiment
Describe detailed features and advantage of the invention in detail in a specific embodiment below, content is enough to make any
Skilled in the art realises that technology contents of the invention and implementing accordingly, and according to specification disclosed by this specification, power
Benefit requires and attached drawing, skilled person readily understands that the relevant purpose of the present invention and advantage.
Traditional capacitance key touch generallys use that the media implementations such as spring, conductive adhesive tape are spatially extended, and cost is peace
The raising of dress and maintenance cost.The simple method for improving sensitivity, can only realize finger/human body presence in space, and nothing
Method realizes the positioning for being accurate to certain point.For panel plane in practice, hanging touch can reduce water using floor file around key
The false triggering of flat direction key, but not can solve shadow effect bring false triggering problem.Aqueous, the system-level interference the case where
Under, it is hanging to touch due to lesser semaphore, so that key is easier false triggering and missing inspection.Therefore, needing one kind may be implemented
The hanging touch key system of the high-performance of precise positioning.
The characteristics of the present invention is based on the effective key areas and invalid key area of different key movement, utilizes special electricity
Pole arrangement carries out the detection of capacitor key by medium of air, realizes finger key precise positioning without additional conductive material
Eliminate shadow effect when inactive area false triggering and key are arranged up and down simultaneously, and can be in environmental change, system-level dry
Disturb and with temperature variations in the case where, keep superperformance.Due to saving the elements such as spring, conductive adhesive tape and installation dimension
Cost is protected, the present invention can be used as the scheme of substitution conventional touch key completely.Therefore, the present invention has preferable volume production prospect.
The present invention provides a kind of for realizing the method touched every sky, this method comprises:
A. division key effective coverage and key inactive area on pcb board are being touched every sky.Wherein, induction immediately below finger
Region is key effective coverage, and other is key inactive area.
B. induction electrode is spread in key effective coverage and key inactive area.
C. the electrode of key effective coverage and key inactive area in step b is grouped.
D. after being grouped, according to hardware resource, same group of electrode is connected to the same or different of capacitance touch detection unit
Detection mouth.
E. capacitance detecting data in step d are sent respectively to active electrode data processing unit and dispersing electrode data
Unit is managed, the judgement of key virtual value is carried out.
The technical solution of the application is further described with specific embodiment below.
Formula is generated by capacitor:
The π kd of C=S × ε/4 formula 1
It is found that the size of inductance capacitance reduces with the increase of distance of reaction.When finger and induction electrode exist centainly
Distance when pressing, traditional capacitance key detection circuit can detect depositing for finger under vacant state by reducing decision threshold
?.
Precise positioning in horizontal direction
With every Ullage from increase, the size of inductance capacitance with horizontal distance increase decaying it is slower.Fig. 1 shows one
The capacitor schematic diagram of a induction electrode.As shown in figure 1, the capacitance size difference between A in horizontal direction, B two o'clock and induction electrode
Reduce with the increase of d1, only by way of improving sensitivity, is only able to detect the presence that there is finger in the region AB, and cannot
Distinguish key point A and B.
Fig. 2 shows multi-electrode schematic diagrames according to an embodiment of the invention.In the present invention, by the way of multiple electrodes
(such as Fig. 2) sensed data in induction electrode 2 and induction electrode 3 can be used to come into one for the small situation of induction point A and B difference
Step judges actual key point.
The induction amount for enabling induction electrode 1~3 is respectively x1, x2, x3, establishes judgment condition set C1 for induction point A and B,
C2。
C1=x1, x2, x3 | x1 > GA1, x2 > GA2, x3 > GA3 }
C2=x1, x2, x3 | x1>GB1, x2<GB2, x3>GB3 }
Wherein GA1~GA3, GB1~GB3 are decision threshold.
By adjusting set C1, C2 judgment condition can flexibly realize the judgement to induction region.
Precise positioning in vertical direction
To invalid key area floor file can above weakening area induction field intensity, to further eliminate adjacent key
Influence.But when key is arrangement up and down, due to the shadow effect (as shown in Figure 3) of hand, cause when pressing top key,
The key of underface can generate the variable quantity for being equivalent to finger down, to cannot be distinguished.Shadow effect is multiple rows of key
It is obvious in, client's use scope is often limited in previous scheme, only allows not supporting double using single key
Key solves the problems, such as this.
The present invention uses special electrode pattern, can effectively solve the influence of shadow effect, presses when arranging in finger touch
When key, the overall region of lower row's key is all covered by palm, and the multiple electrodes under shade can reach threshold value and set, and finger
For the electrode of touch other than central area, the induction amount of the dispersing electrode in other regions will not meet threshold condition, pass through
Such method can effectively identify that finger effectively touches or the influence of shadow effect.
The special electrode pattern of example 1. solves to touch shadow effect every sky and inactive area touches effect
In the present invention, due to the specific configuration of electrode, the predicting relation of key is not limited only to the condition of single electrode threshold value.
In Fig. 4, the induction amount of actual induction electrode is x1 for invalid induction electrode P (2 is added in the judgement set of effective coverage
~5) condition: enable induction electrode p induction amount be xp, (p=1,2,3,4,5) in Fig. 4 induction point key condition for validity, i.e.,
Judgment condition is set C3:
C3=x1, x2, x3, x4, x5 | x1>GA1, x2<GA2, x3<GA3, x4<GA4, x5<GA5 }
Using electrode scheme shown in Fig. 4, wherein induction electrode 1 is active electrode, induction electrode 2, induction electrode 3, induction
Electrode 4, induction electrode 5 are all dispersing electrodes, the key condition for validity touched using electrode described in Fig. 4, finger are as follows: actual induction
Electrode 1 meets threshold condition, while the discontented threshold condition of all dispersing electrodes.
It can be seen that from the judgment condition of above-mentioned effective key using figure as shown in Figure 4, the finger of horizontal direction touches
Inactive area, then the influence value of its actual induction electrode 1 is unable to satisfy threshold condition, then will not be mistaken for effective key.Equally
, when using electrode shown in Fig. 4 as double-keyboard electrode, when arranging key in touch, lower row's key corresponds to the yin of palm
Shadow area, the induction amount of active electrode 1 and dispersing electrode 2,3,5 all can all increase, and dispersing electrode can also be greater than threshold value, comprehensive
It sees, is also unable to satisfy effective judgment condition of C3, so can effectively solve the invalid of horizontal direction using key shown in Fig. 4
Region touches and the shadow effect of vertical direction.
Effectively judge as can use between each electrode difference in Fig. 5 as key.With figure shown in fig. 5, touch is pressed
Key induction point key condition for validity, i.e. judgment condition are set C4:
C4=x1, x2, x3, | x1>GA1, x2>GA2, x3>GA3, x1-x2<GB1, x1-x2<GB2, x2-x3<GB3 }
Wherein GA1~GA3, GB1~GB3 are decision threshold.The threshold condition of wherein GB1, GB2, GB3 are active electrode 1,
2, the 3 directly mutual differences connect, when finger touches the center of shown Fig. 5, the induction amount of induction electrode 1,2,3 is answered
This can all increase, simultaneously as being in center, the difference between 3 induction electrodes should be smaller, so shown in fig. 5
Key condition for validity should be greater than its threshold value for 3 effectively key induced values, meanwhile, the difference between induction electrode is less than threshold
Value.
Using electrode pattern shown in fig. 5, in addition to can solve horizontal inactive area false triggering problem and shadow effect, also
The anti-common mode interference ability that key can be improved, since key judgment condition is judged using the difference between key,
Common mode interference can effectively be inhibited.
It should be noted that electrode shape and distribution can be designed according to application demand, it is not limited only to provided above show
Relationship between example and electrode, if following figure Fig. 6 show some figures that the present invention designs, different applications needs
The inactive area of protection is different, and user can be according to the shape of touch tablet, the effective key distribution of electrode, by key spacing and
Multikey selects corresponding electrode pattern, different electrode patterns, the protective value of detection and inactive area for effective coverage
It is inconsistent.User can select optimal figure as the active electrode of scheme according to actual application environment.
The electrode that example 2. saves cost is grouped scheme
The precise positioning on horizontally and vertically can be realized using multiple electrodes, but in the limited feelings of hardware resource
Under condition, a kind of electrode design scheme that can balance resource and performance is needed.Electrode in the present invention is grouped scheme, can be with less
I/O port realize multi electrode combination scheme.
As shown in fig. 7, four keys are divided to two groups of arrangements up and down, key there are two upper group, there are two keys for the following group.Each press
The active electrode (being located at that square electrode of the centre of each key) of key is separately connected a detection mouth (i.e. detection mouth 3-
6).Dispersing electrode 1.1,2.1 is connected to detection mouth 1；Dispersing electrode 3.1,4.1 is connected to capacitance detecting mouth 2；It will invalid electricity
1.2,1.4,2.2,2.4,3.2,3.4,4.2,4.4 points of pole is one group, is connected to capacitance detecting mouth 7.In this way, can be realized 7
Key detection mouth completes the judgement of 4 hanging keys.Certainly, it should be appreciated by those skilled in the art that point of electrode and detection mouth
With being transformable with connection type.For example, hardware resource abundance in the case where, can also each electrode connect a detection
Mouthful, or use other connection types.
Example 3. improves anti-interference ability with dispersing electrode
Other than the effective key area of auxiliary positioning, dispersing electrode be alternatively arranged as judgement EMC, the presence of interference such as water and
Extract the reference of interference signal.
Using key arrangement example in Fig. 4, key effective coverage judgment condition are as follows:
C3=x1, x2, x3, x4, x5 | x1>GA1, x2<GA2, x3<GA3, x4<GA4, x5<GA5 }
When there is water covering, since the mutual capacitance between each electrode increases, any key is pressed, other keys can connect
It is dynamic；In the presence of system-level interference, data dithering shows consistency whithin a period of time between each electrode.Therefore, it uses
Whether the key example of Fig. 4 can quickly detect current environment with the presence of interference.
Here the term and form of presentation used is only intended to describe, and the present invention should not be limited to these terms and table
It states.It is not meant to exclude the equivalent features of any signal and description (or in which part) using these terms and statement, should recognize
Knowing various modifications that may be present should also be included in scope of the claims.Other modifications, variations and alternatives are also likely to be present.
Correspondingly, claim should be regarded as covering all these equivalents.
Equally, it should be pointed out that although the present invention is described with reference to current specific embodiment, this technology neck
Those of ordinary skill in domain it should be appreciated that more than embodiment be intended merely to illustrate the present invention, in no disengaging present invention
Various equivalent change or replacement can be also made in the case where spirit, therefore, as long as right in spirit of the invention
The variation, modification of above-described embodiment will all be fallen in the range of following claims.
Claims (8)
1. a kind of realize the method touched every sky using more induction electrodes, which is characterized in that the described method includes:
A. at least one key effective coverage and at least one key dead space are being divided to a key on pcb board every empty touch
Domain, wherein induction region is key effective coverage immediately below finger, and other is key inactive area；
B. induction electrode is spread in key effective coverage and key inactive area；
C. the electrode of key effective coverage and key inactive area in step b is grouped；
D. after being grouped, according to hardware resource, same group of electrode is connected to the same or different detection of capacitance touch detection unit
Mouthful；
E. capacitance detecting data in step d are sent respectively to active electrode data processing unit and dispersing electrode data processing list
Member carries out the judgement of key virtual value.
2. the method touched every sky is realized using more induction electrodes as described in claim 1, which is characterized in that touched every sky
It touches and at least one key effective coverage is divided to a key on pcb board and at least one key inactive area includes:
The intermediate region of the key is divided into a key effective coverage, will be drawn around the neighboring area of the intermediate region
It is divided into one or more key inactive areas.
3. the method touched every sky is realized using more induction electrodes as described in claim 2, which is characterized in that the key
Effective coverage is square, and there are four the key inactive areas, is located at four sides of the effective coverage, each key without
Effect region is rectangle.
4. the method touched every sky is realized using more induction electrodes as described in claim 2, which is characterized in that the key
Effective coverage is circle, and there are four the key inactive areas, is located at the surrounding of the effective coverage.
5. the method touched every sky is realized using more induction electrodes as described in claim 1, which is characterized in that described pair of step
The electrode of key effective coverage and key inactive area, which is grouped, in rapid b includes:
The key effective coverage is divided into one group, the key inactive area is divided into one group.
6. the method touched every sky is realized using more induction electrodes as described in claim 1, which is characterized in that described pair of step
The electrode of key effective coverage and key inactive area, which is grouped, in rapid b includes:
The key effective coverage is divided into one group, the key inactive area is divided into multiple groups, wherein the number of the multiple groups
Depending on the hardware resource.
7. the method touched every sky is realized using more induction electrodes as described in claim 2, which is characterized in that the key
The mode of virtual value judgement is as follows:
The induction amount for enabling actual induction electrode is x1, and the induction amount of invalid induction electrode is that (p=2,3,4 ... n), wherein n table by xp
Show (n-1)th invalid induction electrode, enabling judgment condition is set C3, then:
C3=x1, x2, x3, x4 ... xn | x1>GA1, x2<GA2, x3<GA3, x4<GA4 ..., xn<GAn }, wherein GA1~
GAn is the threshold condition of each electrode.
8. a kind of key system, the key system includes multiple rows of key group, and every row's key group includes one or more keys,
In, the induction mode of each key is using the method touched as described in claim 1 using the realization of more induction electrodes every sky.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811284925.8A CN109450426A (en) | 2018-10-31 | 2018-10-31 | A method of it is realized using more induction electrodes and is touched every sky |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811284925.8A CN109450426A (en) | 2018-10-31 | 2018-10-31 | A method of it is realized using more induction electrodes and is touched every sky |
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| CN201811284925.8A Pending CN109450426A (en) | 2018-10-31 | 2018-10-31 | A method of it is realized using more induction electrodes and is touched every sky |
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| CN110673752A (en) * | 2019-09-20 | 2020-01-10 | 珠海格力电器股份有限公司 | Touch control method and device and electronic equipment |
| CN111082794A (en) * | 2019-12-26 | 2020-04-28 | 上海东软载波微电子有限公司 | Capacitive touch unit and capacitive touch key |
| CN111573457A (en) * | 2020-04-13 | 2020-08-25 | 北京他山科技有限公司 | Hover button sensor unit and method for providing trigger of hover button |
| CN113253882A (en) * | 2021-05-21 | 2021-08-13 | 东风汽车有限公司东风日产乘用车公司 | Mouse simulation method, electronic device and storage medium |
| WO2021208156A1 (en) * | 2020-04-13 | 2021-10-21 | 北京他山科技有限公司 | Hover button sensor unit and method for triggering hover button |
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Application publication date: 20190308 |