CN106301325B - Touch identification method and device of capacitive touch key - Google Patents
Touch identification method and device of capacitive touch key Download PDFInfo
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- CN106301325B CN106301325B CN201610662517.6A CN201610662517A CN106301325B CN 106301325 B CN106301325 B CN 106301325B CN 201610662517 A CN201610662517 A CN 201610662517A CN 106301325 B CN106301325 B CN 106301325B
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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
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Abstract
The disclosure discloses a touch identification method and device of a capacitive touch key. The method comprises the following steps: detecting an electrical parameter of a capacitive touch key, determining a first capacitive touch key and a second capacitive touch key which are touched and adjacent to each other according to the change of the electrical parameter, acquiring a first electrical parameter variation of the first capacitive touch key and a second electrical parameter variation of the second capacitive touch key, comparing the first electrical parameter variation and the second electrical parameter variation with preset pressing critical values respectively to obtain a comparison result, and processing the first electrical parameter variation and the second electrical parameter variation according to the comparison result by taking a preset threshold value as a reference so as to identify the capacitive touch key for touch response. The touch identification method and the touch identification device for the capacitive touch keys can accurately identify the touch operation of the capacitive touch keys.
Description
Technical Field
The present disclosure relates to the field of electrical signal processing, and in particular, to a touch identification method and device for a capacitive touch key.
Background
Due to the beauty and convenience in operation, the capacitive touch keys are increasingly applied to electronic products. An induction spring is arranged below the capacitive touch key. When a certain capacitive touch key is touched, the sensing spring below the certain capacitive touch key is pressed, so that the electrical parameter of the capacitive touch key is changed. Therefore, the touch identification of the capacitive touch key is carried out by detecting the change of the electrical parameter of the capacitive touch key.
Currently, a touch identification method of a capacitive touch key is to determine whether an electrical parameter variation of a single capacitive touch key reaches a preset pressing critical value, so as to determine whether the capacitive touch key is responded.
However, when the touch operation area is in an edge area of a certain capacitive touch key, the touch range covers the adjacent capacitive touch key, or the touch force is large, and the like, the electrical parameter variation of the capacitive touch key and the adjacent capacitive touch key may reach a preset pressing critical value and cause a response error, so that the touch operation of the capacitive touch key cannot be accurately identified.
Disclosure of Invention
In order to solve the technical problem that the touch operation of the capacitive touch key cannot be accurately identified in the related art, the disclosure provides a touch identification method and device of the capacitive touch key.
A touch identification method of a capacitive touch key comprises the following steps:
detecting an electrical parameter of a capacitive touch key, and determining a first capacitive touch key and a second capacitive touch key which are adjacent and touched according to the change of the electrical parameter;
acquiring a first electrical parameter variation of the first capacitive touch key and a second electrical parameter variation of the second capacitive touch key;
comparing the first electrical parameter variation and the second electrical parameter variation with a preset pressing critical value respectively to obtain a comparison result;
and processing the first electrical parameter variation and the second electrical parameter variation according to the comparison result by taking a preset threshold value as a reference, and identifying a capacitive touch key for performing touch response from the first capacitive touch key and the second capacitive touch key.
A touch recognition device for a capacitive touch key, comprising:
the touch detection module is used for detecting the electrical parameters of the capacitive touch keys and determining that the first capacitive touch key and the second capacitive touch key which are adjacent to each other are touched according to the change of the electrical parameters;
the variable quantity acquisition module is used for acquiring a first electrical parameter variable quantity of the first capacitive touch key and a second electrical parameter variable quantity of the second capacitive touch key;
the comparison module is used for comparing the first electrical parameter variation and the second electrical parameter variation with preset pressing critical values respectively to obtain comparison results;
and the identification module is used for processing the first electrical parameter variation and the second electrical parameter variation according to the comparison result by taking a preset threshold value as a reference, and identifying a capacitive touch key for performing touch response from the first capacitive touch key and the second capacitive touch key.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
when the touch operation of the capacitive touch keys is identified, a first capacitive touch key and a second capacitive touch key which are touched and adjacent to each other are determined through the change of the electrical parameter of the capacitive touch keys, the first electrical parameter variation of the first capacitive touch key and the second electrical parameter variation of the second capacitive touch key are obtained, the first electrical parameter variation and the second electrical parameter variation are respectively compared with a preset pressing critical value to obtain a comparison result, the first electrical parameter variation and the second electrical parameter variation are processed according to the comparison result by taking a preset threshold value as a reference, and the capacitive touch keys which are subjected to touch response are identified from the first capacitive touch key and the second capacitive touch key. Therefore, the electrical parameter variation of the two adjacent capacitive touch keys is processed according to the pressing critical value and the preset threshold value, the touch operation of the capacitive touch keys is identified, the phenomenon that error identification is caused by misoperation or the situation that the electrical parameters of the adjacent capacitive touch keys are larger than the pressing critical value and the like is avoided, and the accuracy of touch identification is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a flow chart illustrating a method of touch recognition for a capacitive touch key according to an exemplary embodiment;
FIG. 2 is a schematic diagram illustrating an internal structure of a capacitive touch key according to an exemplary embodiment;
FIG. 3 is a schematic diagram illustrating a capacitive touch key according to an exemplary embodiment;
fig. 4 is a flowchart illustrating a step of identifying a capacitive touch key for performing a touch response from the first capacitive touch key and the second capacitive touch key by processing the first electrical parameter variation and the second electrical parameter variation according to the comparison result with reference to a preset threshold in the embodiment corresponding to fig. 1;
FIG. 5 is a flowchart illustrating a step of identifying a capacitive touch key for performing a touch response from the first capacitive touch key and the second capacitive touch key by processing the first electrical parameter variation and the second electrical parameter variation according to the comparison result with reference to a preset threshold in the corresponding embodiment of FIG. 1;
FIG. 6 is a block diagram illustrating a touch recognition arrangement for a capacitive touch key according to an exemplary embodiment;
FIG. 7 is a block diagram of an identification module shown in a corresponding embodiment in FIG. 6;
FIG. 8 is a block diagram of a touch determination sub-module shown in a corresponding embodiment in FIG. 7;
FIG. 9 is a block diagram of an identification module shown in a corresponding embodiment in FIG. 6;
fig. 10 is a block diagram of the capacitive touch key identification submodule shown in the corresponding embodiment of fig. 9.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Fig. 1 is a flowchart illustrating a touch recognition method of a capacitive touch key according to an exemplary embodiment. As shown in fig. 1, the touch recognition method of the capacitive touch key may include the following steps.
In step S110, an electrical parameter of the capacitive touch key is detected, and the first capacitive touch key and the second capacitive touch key which are adjacent to each other and touched are determined according to a change of the electrical parameter.
A terminal device such as a medical display or a touch panel is generally provided with a capacitive touch key, and a user inputs information by touch operation of the capacitive touch key.
Specifically, fig. 2 is a schematic diagram illustrating an internal structure of a capacitive touch key according to an exemplary embodiment. As shown in fig. 2, the capacitive touch key 1 and the capacitive touch key 2 are respectively provided with an induction spring 1 and an induction spring 2 inside. When the area part of the capacitive touch key 1 in the panel a is touched, the induction spring 1 below the capacitive touch key is pressed, so that the electrical parameter of the capacitive touch key 1 is changed. Therefore, the capacitance type touch key which is touched is identified by detecting the change of the electrical parameter. The electrical parameter may be a capacitance parameter of the capacitive touch key, a dielectric constant near the capacitive touch key, or other electrical parameters.
For a single capacitive touch key, when a touch operation area is in an edge area of a certain capacitive touch key, a touch range covers an adjacent capacitive touch key or the touch force is large, the capacitive touch key and the capacitive touch key adjacent to the capacitive touch key, namely, electrical parameters of the first capacitive touch key and the adjacent second capacitive touch key are changed.
Specifically, fig. 3 is a schematic structural diagram illustrating a touch area in a capacitive touch key according to an exemplary embodiment. As shown in fig. 3, the touch area of the capacitive touch key includes an area a and an area B formed by extending the area a outward. When the touched area is positioned in the part, close to the capacitive touch key 2, in the area B of the capacitive touch key 1, the electrical parameters of the capacitive touch key 1 and the capacitive touch key 2 are changed; when the touched area comprises an area A and a part, close to the capacitive touch key 2, in the area B of the capacitive touch key 1 and touches the area B of the capacitive touch key 2, the electrical parameters of the capacitive touch key 1 and the capacitive touch key 2 are changed; when the touch operation is in the area a and the area B of the capacitive touch key 1, but the touch operation is strong, the electrical parameters of the capacitive touch key 1 and the capacitive touch key 2 are also changed. Other touch operation modes can also change the electrical parameters of the first capacitive touch key and the adjacent second capacitive touch key.
Based on the method, the electric parameters of the capacitive touch keys are detected, and then two adjacent capacitive touch keys with changed electric parameters, namely a first capacitive touch key and a second capacitive touch key, are determined.
In step S120, a first electrical parameter variation of the first capacitive touch key and a second electrical parameter variation of the second capacitive touch key are obtained.
And when the touch operation does not occur, detecting the initial electrical parameters of the capacitive touch key. After detecting that the electrical parameters of the first capacitive touch key and the second capacitive touch key change, combining the initial electrical parameters to obtain the electrical parameter variation of the first capacitive touch key and the second capacitive touch key, taking the electrical parameter variation of the first capacitive touch key as the first electrical parameter variation, and taking the electrical parameter variation of the second capacitive touch key as the second electrical parameter variation.
In step S130, the first electrical parameter variation and the second electrical parameter variation are respectively compared with a preset pressing threshold value to obtain a comparison result.
The pressing critical value is a preset electrical parameter variation critical value and represents a basic critical value of the capacitive touch key. If the electrical parameter variation of the capacitive touch key is smaller than the pressing critical value, it is indicated that the touched area is not in the touched area of the capacitive touch key, or the force of the touch operation is insufficient, so that the possibility of mistaken touch is high.
For example, the touch area of the capacitive touch key 1 includes an area a and an area B formed by extending the area a outward, the pressing threshold value is 100, and when the detected change of the electrical parameter of the capacitive touch key 1 is 50, it indicates that the touched area is not in the touch area of the capacitive touch key 1, or the touched area is in the area a or the area B of the capacitive touch key 1, but the force is too small, and it is likely to be a false touch.
In step S140, the first electrical parameter variation and the second electrical parameter variation are processed according to the comparison result with reference to a preset threshold, and a capacitive touch key performing a touch response is identified from the first capacitive touch key and the second capacitive touch key.
The threshold is a preset electrical parameter value, and a specific numerical value corresponding to the threshold is determined according to the setting of the touch area in the capacitive touch key.
And when at least one of the first electrical parameter variation and the second electrical parameter variation is larger than or equal to the pressing critical value, further processing the first electrical parameter variation and the second electrical parameter variation according to a preset threshold value, so as to identify the capacitive touch key for performing touch response.
By the method, when the capacitive touch keys are subjected to touch operation, the electrical parameters of the capacitive touch keys are detected, and when the electrical parameters of two adjacent capacitive touch keys, namely the first capacitive touch key and the second capacitive touch key, change, the electrical parameter variation of the two adjacent capacitive touch keys which are touched is processed according to a preset pressing critical value and a preset threshold value, so that the capacitive touch keys which are subjected to touch response are identified, the situation that the two adjacent capacitive touch keys cannot respond accurately when being touched is avoided, and the accuracy of identifying the touch operation of the capacitive touch keys is improved.
Fig. 4 is a description of details of step S140 shown according to an exemplary embodiment. In step S140, the touch response area of the capacitive touch key is an expected response area, and the preset threshold is a middle position pressing limit value, where the step S140 may include the following steps.
In step S141, if the comparison result indicates that the first electrical parameter variation and the second electrical parameter variation are both greater than the pressing threshold value, a relative difference between the first electrical parameter variation and the second electrical parameter variation is obtained.
The expected response area is located in the middle of the capacitive touch key, and only when the expected response area is touched, the corresponding capacitive touch key can respond. The epitaxial region formed by the extension of the expected response region is a mis-touch region. When the capacitive touch key is touched, due to the fact that a touched area is large or when deviation is generated by touch, the capacitive touch key can touch an expected response area, and can also touch a mistaken touch area extending out of the capacitive touch key and even touch an adjacent capacitive touch key. Therefore, it is necessary to determine the area where the touch occurs and identify the capacitive touch key that responds.
When the first electrical parameter variation and the second electrical parameter variation are both larger than the pressing critical value, it is indicated that the corresponding first capacitive touch key and the corresponding second capacitive touch key are touched, and at this time, the first electrical parameter variation and the second electrical parameter variation need to be further processed to determine the capacitive touch key which performs touch response in the first capacitive touch key and the second capacitive touch key.
The relative difference is a relative magnitude of the first electrical parameter variation and the second electrical parameter variation, i.e. an absolute value corresponding to a difference between the first electrical parameter variation and the second electrical parameter variation.
For example, the first electrical parameter variation is 110, the second electrical parameter variation is 130, and the pressing threshold is 100. And if the first electrical parameter variation and the second electrical parameter variation are both larger than the pressing critical value, the relative difference value of the first electrical parameter variation and the second electrical parameter variation is 20.
When the first electrical parameter variation and the second electrical parameter variation are both smaller than or equal to the pressing critical value, it is indicated that the touched area is in the false touch area of the corresponding first capacitive touch key or the corresponding second capacitive touch key, or the touch operation strength is not large enough, and the probability of false touch is very high, so that neither the first capacitive touch key nor the second capacitive touch key performs touch response.
When only one of the first electrical parameter variation and the second electrical parameter variation is larger than the pressing critical value, it indicates that the expected touch area of the capacitive touch key corresponding to the electrical parameter variation larger than the pressing critical value is touched, and thus the capacitive touch key is identified as the responding capacitive touch key.
For example, the first electrical parameter variation of the capacitive touch key 1 is 110, the second electrical parameter variation of the capacitive touch key 2 is 80, and the pressing threshold is 100. And only if the variation of the first electrical parameter is larger than the pressing critical value, judging that only the capacitive touch key 1 is touched in the expected response area, and identifying the capacitive touch key 1 as a responding capacitive touch key.
In step S142, the touch in the expected response area and/or the false touch area is identified according to the relative difference and the middle position pressing limit, and it is determined whether the touch in the expected response area of the first capacitive touch key or the second capacitive touch key occurs, if so, step S143 is performed, and if not, step S144 is performed.
The middle position pressing limit value is a preset electric parameter variation value and indicates that the touch operation area is located at the boundary of the expected response area and the false touch area. The middle position pressing limit value is used for identifying the touch of the adjacent capacitive touch keys, namely the touch of the middle position between the first capacitive touch key and the second capacitive touch key, and the touch of the middle position is regarded as the false touch. Therefore, this will be recognized by the mid-position press limit to avoid responding to this touch.
And identifying that the area where the touch occurs is an expected response area comprising the capacitive touch key according to the relative difference value of the first electrical parameter variation and the second electrical parameter variation and the numerical value of the middle position pressing limit value.
When the relative difference value of the first electrical parameter variation and the second electrical parameter variation is smaller than the middle position pressing limit value, the fact that the touched area is located in a mistaken touch area between the first capacitive touch key and the second capacitive touch key is indicated, and the expected response areas of the two capacitive touch keys are not touched; when the relative difference value of the first electrical parameter variation and the second electrical parameter variation is larger than or equal to the middle position pressing limit value, the area where the touch occurs is located in the expected response area of one of the capacitive touch keys, so that the touch operation actually triggered by the user can be judged to be the touch operation currently occurring, and further accurate response needs to be carried out.
In step S143, the capacitive touch key corresponding to the largest electrical parameter variation of the first electrical parameter variation and the second electrical parameter variation is identified as the capacitive touch key performing the touch response.
After the area where the touch occurs is judged to be in the expected response area of one of the capacitive touch keys, the first electrical parameter variation and the second electrical parameter variation are compared, and the capacitive touch key corresponding to the electrical parameter variation with a large value is determined to be the capacitive touch key for performing the touch response.
For example, the first electrical parameter variation is 110, the second electrical parameter variation is 130, the pressing threshold is 100, and the middle pressing threshold is 15. The first electrical parameter variation and the second electrical parameter variation are both larger than the pressing critical value, and the relative difference value of the first electrical parameter variation and the second electrical parameter variation is 20. And if the relative difference is larger than the middle position pressing limit value, determining the second capacitive touch key corresponding to the second electrical parameter variation with the larger value as the capacitive touch key for performing touch response.
In step S144, it is determined that the touched area is in the mis-touch area between the first capacitive touch key and the second capacitive touch key.
According to the method, according to the preset middle position pressing limit value, when the touched area is in the mistaken touch area between two adjacent capacitive touch keys, the touch operation is not responded, and the touch response is only performed when the touched area comprises the expected response area of the capacitive touch keys, so that the situation that the touch operation cannot be accurately identified when the variation of the electrical parameters of a plurality of capacitive touch keys is larger than the pressing limit value is avoided, and the accuracy of the touch operation identification of the capacitive touch keys is improved.
Fig. 5 is a description of details of step S140 shown according to an exemplary embodiment. In step S140, the touch response area of the capacitive touch key is an expected response area, and the preset threshold is a touch offset limit, where the step S140 may include the following steps.
In step S145, if the comparison result indicates that only one of the first electrical parameter variation and the second electrical parameter variation is smaller than the pressing threshold, the capacitive touch key with the expected response area among the first capacitive touch key and the second capacitive touch key is identified according to the electrical parameter variation smaller than the pressing threshold in the first electrical parameter variation and the second electrical parameter variation with reference to the touch offset limit.
The expected response area is located in the middle of the capacitive touch key, and an extension area formed by extending the expected response area is a false touch area.
When the expected response area of the capacitive touch key is touched, the mistaken touch area of the capacitive touch key is touched due to operation deviation. When the touch operation is deviated, the electrical parameters of the adjacent capacitive touch keys are also changed to a certain extent. Therefore, according to the electrical parameter variation of the two adjacent capacitive touch keys when touching, the touch offset limit value is referred to, whether the touch operation generates offset or not is further judged, touch response is still performed when the touch operation touches the mistaken touch area of the capacitive touch key, and the accuracy of touch identification is improved.
And the touch offset limit value represents the electrical parameter variation of the capacitive touch key adjacent to the capacitive touch key when the area where touch occurs is located on the boundary of the expected response area and the mistaken touch area of the capacitive touch key.
For example, when a touch occurs, the first electrical parameter variation corresponding to the first capacitive touch key is 110, the second electrical parameter variation corresponding to the second capacitive touch key is 70, the pressing threshold value is 100, and the touch offset limit value is 70. The area touched at this time is positioned on the boundary of the expected response area and the error touch area of the first capacitive touch key.
When only one of the first electrical parameter variation and the second electrical parameter variation is smaller than the pressing critical value, the capacitive touch key with the large electrical parameter variation is touched, but whether the touched area is the expected response area of the capacitive touch key cannot be determined. Therefore, the first electrical parameter variation and the second electrical parameter variation need to be further processed to determine whether the touch operation is shifted.
And judging whether the touched area deviates to the mistaken touch area of the capacitive touch key according to the electric parameter variation smaller than the pressing critical value in the first electric parameter variation and the second electric parameter variation and the size of the touch deviation limit value, and further identifying the capacitive touch key touched in the expected response area.
When the electrical parameter variation smaller than the pressing critical value in the first electrical parameter variation and the second electrical parameter variation is smaller than the touch offset limit value, it indicates that the touch operation does not generate offset, and the touched area is an expected response area of the capacitive touch key with large electrical parameter variation.
When the variation of the electrical parameter smaller than the pressing critical value in the variation of the first electrical parameter and the variation of the second electrical parameter is larger than or equal to the touch offset limit value, it indicates that the touch operation generates offset, and the touched area is offset to the mistakenly touched area of the capacitive touch key with large variation of the electrical parameter.
And during touch operation, if the variation of the first electrical parameter and the variation of the second electrical parameter are not less than the pressing critical value, the touched area is covered on the touch area of the corresponding first capacitive touch key and the second capacitive touch key. Therefore, the condition that only the expected response area of a certain capacitive touch key is touched is not the case.
When the first electrical parameter variation and the second electrical parameter variation are both smaller than the pressing critical value, it is indicated that the touched area is in the false touch area of the corresponding first capacitive touch key or second capacitive touch key, or the touch operation strength is not large enough, which is the probability of false touch is very high, and therefore, the situation is not the situation that only the expected response area of the capacitive touch key is touched.
In step S146, the capacitive touch key, which is touched in the expected response area of the first capacitive touch key and the second capacitive touch key, is identified as the capacitive touch key performing the touch response.
By the method, when the touch operation is identified, the identification response is carried out on the capacitive touch key only when the touched area is in the expected response area of the capacitive touch key, and whether the touch operation is deviated or not is judged by referring to the touch deviation limit value, so that the capacitive touch key which is touched only in the expected response area is identified to be responded, and the accuracy of identifying the touch operation of the capacitive touch key is improved.
The following is an embodiment of the disclosed apparatus, which can be used to implement the embodiment of the touch recognition method for the capacitive touch key. For details not disclosed in the embodiments of the device disclosed in the present disclosure, please refer to the embodiments of the touch recognition method for the capacitive touch key disclosed in the present disclosure.
Fig. 6 is a block diagram illustrating a touch recognition device of a capacitive touch key according to an exemplary embodiment, as shown in fig. 6, the touch recognition device of the capacitive touch key includes but is not limited to: the touch detection module 110, the variation acquisition module 120, the comparison module 130, and the identification module 140.
The touch detection module 110 is configured to detect an electrical parameter of the capacitive touch key, and determine that the first capacitive touch key and the second capacitive touch key are touched and adjacent to each other through a change of the electrical parameter;
a variation obtaining module 120, configured to obtain a first electrical parameter variation of the first capacitive touch key and a second electrical parameter variation of the second capacitive touch key;
the comparison module 130 is configured to compare the first electrical parameter variation and the second electrical parameter variation with preset pressing critical values respectively to obtain comparison results;
the identifying module 140 is configured to process the first electrical parameter variation and the second electrical parameter variation according to the comparison result with reference to a preset threshold, and identify a capacitive touch key performing a touch response from the first capacitive touch key and the second capacitive touch key.
Optionally, as shown in fig. 7, the identification module 140 includes but is not limited to: a relative difference acquisition submodule 141, an expected response region identification submodule 142 and a response identification submodule 143.
A relative difference value obtaining submodule 141, configured to obtain a relative difference value between the first electrical parameter variation and the second electrical parameter variation if the comparison result indicates that both the first electrical parameter variation and the second electrical parameter variation are greater than the pressing critical value;
the touch judgment sub-module 142 is configured to identify a touch occurring in the expected response area and/or the false touch area according to the relative difference value and the middle position pressing limit value, and judge whether the expected response area of the first capacitive touch key or the second capacitive touch key is touched;
the response identification submodule 143 is configured to identify the capacitive touch key corresponding to the largest electrical parameter variation of the first electrical parameter variation and the second electrical parameter variation as the capacitive touch key performing the touch response.
Optionally, as shown in fig. 8, the touch determination sub-module 142 includes but is not limited to: a determination unit 1421 and an expected response region identification unit 1422.
A judging unit 1421, configured to judge whether the relative difference is smaller than a middle position pressing limit;
the touch identification unit 1422 is configured to, if the answer is no, touch the expected response area of the first capacitive touch key or the second capacitive touch key.
Optionally, as shown in fig. 9, the identification module 140 includes but is not limited to: a capacitive touch key identification sub-module 145 and a response determination sub-module 146.
The capacitive touch key identification submodule 145 is configured to identify a capacitive touch key, which is touched in an expected response area of the first capacitive touch key and the second capacitive touch key, according to the electrical parameter variation smaller than the pressing critical value in the first electrical parameter variation and the second electrical parameter variation, with reference to the touch offset limiting value if the comparison result indicates that only one of the first electrical parameter variation and the second electrical parameter variation is smaller than the pressing critical value;
and a response determination sub-module 146, configured to identify a capacitive touch key, which is touched in an expected response area of the first capacitive touch key and the second capacitive touch key, as a touch-responsive capacitive touch key.
Optionally, as shown in fig. 10, the capacitive touch key identification sub-module 145 includes but is not limited to: a variation extracting unit block 1451 and an offset limit judging unit 1452.
A variation extracting unit 1451 for extracting an electrical parameter variation smaller than the pressing critical value from the first electrical parameter variation and the second electrical parameter variation;
the capacitive touch key identification unit 1452 is configured to determine whether a variation of the electrical parameter is smaller than a touch offset limit, and if so, identify a capacitive touch key, which is touched in an expected response area, of the first capacitive touch key and the second capacitive touch key.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (8)
1. A method of touch recognition for a capacitive touch key, the touch key including an expected response area, the method comprising:
detecting an electrical parameter of a capacitive touch key, and determining a first capacitive touch key and a second capacitive touch key which are adjacent and touched according to the change of the electrical parameter;
acquiring a first electrical parameter variation of the first capacitive touch key and a second electrical parameter variation of the second capacitive touch key;
comparing the first electrical parameter variation and the second electrical parameter variation with a preset pressing critical value respectively to obtain a comparison result;
if the comparison result indicates that the first electrical parameter variation and the second electrical parameter variation are both larger than the pressing critical value, acquiring a relative difference value between the first electrical parameter variation and the second electrical parameter variation;
recognizing the touch of the expected response area and/or the mistaken touch area according to the relative difference value by taking a preset middle position pressing limit value as reference, and judging whether the expected response area of the first capacitive touch key or the second capacitive touch key is touched or not;
if so, identifying the capacitive touch key corresponding to the maximum electrical parameter variation in the first electrical parameter variation and the second electrical parameter variation as the capacitive touch key for performing touch response.
2. The method according to claim 1, wherein the step of determining whether the expected response area of the first capacitive touch key or the second capacitive touch key is touched by recognizing the touch of the expected response area and/or the mis-touch area according to the relative difference value with reference to a preset middle position pressing limit value comprises:
and judging whether the relative difference value is smaller than the middle position pressing limit value or not, if not, touching an expected response area of the first capacitive touch key or the second capacitive touch key.
3. A method of touch recognition for a capacitive touch key, the touch key including an expected response area, the method comprising:
detecting an electrical parameter of a capacitive touch key, and determining a first capacitive touch key and a second capacitive touch key which are adjacent and touched according to the change of the electrical parameter;
acquiring a first electrical parameter variation of the first capacitive touch key and a second electrical parameter variation of the second capacitive touch key;
comparing the first electrical parameter variation and the second electrical parameter variation with a preset pressing critical value respectively to obtain a comparison result;
if the comparison result indicates that only one of the first electrical parameter variation and the second electrical parameter variation is smaller than the pressing critical value, then
With reference to a preset touch offset limit value, identifying a capacitive touch key which is touched in an expected response area in the first capacitive touch key and the second capacitive touch key according to the electrical parameter variation smaller than the pressing threshold value in the first electrical parameter variation and the second electrical parameter variation;
and identifying the capacitive touch key which is touched in the expected response area in the first capacitive touch key and the second capacitive touch key as the capacitive touch key which performs touch response.
4. The method according to claim 3, wherein the step of identifying the capacitive touch key with which the response area is expected to be touched according to the change of the electrical parameter smaller than the pressing threshold in the first and second changes of the electrical parameter with reference to the preset touch offset limit comprises:
extracting an electrical parameter variation smaller than the pressing critical value from the first electrical parameter variation and the second electrical parameter variation;
and judging whether the electrical parameter variation is smaller than the touch offset limit value, if so, identifying the capacitive touch key touched in the expected response area in the first capacitive touch key and the second capacitive touch key.
5. A touch recognition device for a capacitive touch key, the touch key including an expected response area, the device comprising:
the touch detection module is used for detecting the electrical parameters of the capacitive touch keys and determining that the first capacitive touch key and the second capacitive touch key which are adjacent to each other are touched according to the change of the electrical parameters;
the variable quantity acquisition module is used for acquiring a first electrical parameter variable quantity of the first capacitive touch key and a second electrical parameter variable quantity of the second capacitive touch key;
the comparison module is used for comparing the first electrical parameter variation and the second electrical parameter variation with preset pressing critical values respectively to obtain comparison results;
a relative difference value obtaining sub-module, configured to obtain a relative difference value between the first electrical parameter variation and the second electrical parameter variation if the comparison result indicates that both the first electrical parameter variation and the second electrical parameter variation are greater than the pressing critical value;
the touch judgment sub-module is used for identifying the touch of the expected response area and/or the mistaken touch area according to the relative difference value by taking a preset middle position pressing limit value as a reference, and judging whether the expected response area of the first capacitive touch key or the second capacitive touch key is touched or not;
and the response identification submodule is used for identifying the capacitive touch key corresponding to the maximum electrical parameter variation in the first electrical parameter variation and the second electrical parameter variation as the capacitive touch key for performing touch response if the first electrical parameter variation and the second electrical parameter variation are the same.
6. The apparatus of claim 5, the touch determination sub-module comprising:
the judging unit is used for judging whether the relative difference value is smaller than the middle position pressing limit value or not;
and the touch identification unit is used for touching an expected response area of the first capacitive touch key or the second capacitive touch key if the first capacitive touch key or the second capacitive touch key is not touched.
7. A touch recognition device for a capacitive touch key, the touch key including an expected response area, the device comprising:
the touch detection module is used for detecting the electrical parameters of the capacitive touch keys and determining that the first capacitive touch key and the second capacitive touch key which are adjacent to each other are touched according to the change of the electrical parameters;
the variable quantity acquisition module is used for acquiring a first electrical parameter variable quantity of the first capacitive touch key and a second electrical parameter variable quantity of the second capacitive touch key;
the comparison module is used for comparing the first electrical parameter variation and the second electrical parameter variation with preset pressing critical values respectively to obtain comparison results;
a touch key identification sub-module, configured to, if the comparison result indicates that only one of the first electrical parameter variation and the second electrical parameter variation is smaller than the pressing critical value, identify, with reference to a preset touch offset limit, a capacitive touch key, which is touched in an expected response area of the first capacitive touch key and the second capacitive touch key, according to an electrical parameter variation smaller than the pressing critical value in the first electrical parameter variation and the second electrical parameter variation;
and the response determination submodule is used for identifying the capacitive touch key touched in the expected response area in the first capacitive touch key and the second capacitive touch key as the capacitive touch key for performing touch response.
8. The device of claim 7, the capacitive touch key identification sub-module comprising:
a variation extracting unit for extracting an electrical parameter variation smaller than the pressing critical value from the first electrical parameter variation and the second electrical parameter variation;
and the touch key identification unit is used for judging whether the electrical parameter variation is smaller than the touch offset limit value, and if so, identifying a capacitive touch key which is touched in an expected response area in the first capacitive touch key and the second capacitive touch key.
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| CN107979364B (en) * | 2017-12-28 | 2021-11-16 | 海信视像科技股份有限公司 | Capacitive touch key device and intelligent terminal |
| CN110945464B (en) * | 2019-10-29 | 2023-05-02 | 深圳市汇顶科技股份有限公司 | Identification method of sliding signal, MCU, touch equipment and storage medium |
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| WO2009150285A1 (en) * | 2008-06-10 | 2009-12-17 | Nokia Corporation | Touch button false activation suppression |
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| CN102427355A (en) * | 2011-09-30 | 2012-04-25 | 苏州瀚瑞微电子有限公司 | Touch button state determination method |
| 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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