CN108092657B - Capacitive touch switch with structured touch electrode and triggering method thereof - Google Patents
Capacitive touch switch with structured touch electrode and triggering method thereof Download PDFInfo
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- CN108092657B CN108092657B CN201810008309.3A CN201810008309A CN108092657B CN 108092657 B CN108092657 B CN 108092657B CN 201810008309 A CN201810008309 A CN 201810008309A CN 108092657 B CN108092657 B CN 108092657B
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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
- H03K2217/960755—Constructional details of capacitive touch and proximity switches
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- Electronic Switches (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
Abstract
The invention discloses a capacitive touch switch with a structured touch electrode and a triggering method thereof, wherein the touch switch comprises a detection judging system and at least two groups of touch electrodes, and each group of touch electrodes is electrically connected with the detection judging system; each group of touch electrodes includes one or more electrodes, and when a plurality of electrodes are included, the electrodes are connected by a conductive wire. The triggering method comprises the following steps: the detection and judgment system detects whether the electrodes contained in each group of touch electrodes generate touch signals or not, and judges whether a preset trigger condition is formed or not according to a trigger condition, wherein the trigger condition is the number of the electrodes generating the touch signals and the labels at the same time. According to the capacitive touch switch with the structured touch electrodes, the plurality of groups of touch electrodes are arranged, and the detection and judgment system is used for judging according to the triggering condition of the touch electrodes, so that the touch switch can be effectively prevented from being triggered by moisture or a humid environment, the structure is exquisite, the operation is convenient, and the reliability and the user experience of system equipment carrying the touch switch can be ensured.
Description
Technical Field
The invention relates to the field of touch inductive switches, in particular to a capacitive touch switch with a structured touch electrode and a triggering method thereof.
Background
Touch sensitive switches are rapidly used in many fields due to their advantages such as low cost, robustness, wear resistance, insulation, dust-proof, water-proof, and diversified design. However, in a humid or water environment, the touch switch is easily triggered by mistake, which causes malfunction of system equipment and affects product reliability and customer experience.
The capacitive touch switch mainly comprises a touch electrode, a detection and judgment system and a switch trigger medium, wherein the switch trigger medium is generally a finger, as shown in figure 1.
When the touch electrode is not touched by the switch triggering medium (finger), the detection and judgment system detects the initial capacitance C on the touch electrode0At this time, the detection and determination system assumes that the touch switch is in an OFF state.
When the switch triggering medium touches the touch electrode, the detection and judgment system detects that the capacitance on the touch electrode is changed into Ct. The detection judgment system judges that C ist>C0The condition of (2) is true, the touch electrode is considered to be triggered,the touch switch is in an ON (ON) state.
When system equipment based on the switch works in a humid or water environment, the moisture can cause the switch of the equipment to generate false triggering.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides the capacitive touch switch with the structured touch electrode, which can be used in water or a humid environment and cannot generate false triggering conditions, and the triggering method thereof.
The technical scheme is as follows: in order to achieve the above object, the capacitive touch switch with a structured touch electrode of the present invention includes a detection and judgment system and at least two groups of touch electrodes, wherein each group of touch electrodes is electrically connected to the detection and judgment system; each group of touch electrodes includes one or more electrodes, and when a plurality of electrodes are included, the electrodes are connected by a conductive wire.
Further, each set of the touch electrodes includes two electrodes; all the touch electrodes comprise electrodes which enclose a ring or a polygon, and two electrodes of the same touch electrode are symmetrically arranged relative to the center of the ring or the polygon.
Further, all touch electrodes are arranged in a row, and the electrodes included in the same group of touch electrodes are arranged in a column.
Further, there are three groups of the touch electrodes.
Further, the detection judgment system comprises a touch chip or a microcontroller.
Based on the triggering method of the capacitive touch switch with the structured touch electrodes, the detection and judgment system detects whether the electrodes included in each group of touch electrodes generate touch signals or not, and judges whether a preset triggering condition is formed or not according to the triggering condition, wherein the triggering condition is the number and the labels of the electrodes generating the touch signals at the same time, and the triggering condition can be set to any one triggering condition or the combination of multiple triggering conditions except the triggering condition that all the electrodes generate the touch signals at the same time.
Further, the trigger condition is that all electrodes included in one or more groups of touch electrodes are touched at the same time to generate a touch signal.
Further, each set of the touch electrodes includes two electrodes; the electrodes included in all the touch electrodes enclose a ring or a polygon, two electrodes included in the same touch electrode are symmetrically arranged relative to the center of the ring or the polygon, and when all the electrodes of one group of touch electrodes or all the electrodes of two groups of touch electrodes are touched to generate touch signals, a trigger condition is formed.
Has the advantages that: according to the capacitive touch switch with the structured touch electrodes, the plurality of groups of touch electrodes are arranged, and the detection and judgment system is used for judging according to the triggering condition of the touch electrodes, so that the touch switch can be effectively prevented from being triggered by moisture or a humid environment, the structure is exquisite, the operation is convenient, and the reliability and the user experience of system equipment carrying the touch switch can be ensured.
Drawings
Fig. 1 is a block diagram of a conventional trigger switch;
FIG. 2 is a block diagram of a capacitive touch switch with a structured touch electrode;
fig. 3 is a layout diagram of the touch electrodes.
Fig. 4 is a layout diagram of a touch electrode according to a second embodiment.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The capacitive touch switch with the structured touch electrodes as shown in fig. 2 includes a detection and judgment system 1 and at least two groups of touch electrodes 2, wherein each group of touch electrodes 2 is electrically connected to the detection and judgment system 1; each set of touch electrodes 2 includes one or more electrodes 21, and when a plurality of electrodes 21 are included, the electrodes 21 are connected by a wire. The detection and judgment system 1 comprises a touch chip or a microcontroller. The detection judging system 1 detects the touch condition of the electrode 21, and judges whether the touch is made by a human hand or moisture according to the touch condition. In order to facilitate the detection and judgment of the detection and judgment system 1, all the electrodes 21 have a unique corresponding label in the detection and judgment system 1, and the detection and judgment system 1 judges whether the trigger condition is formed according to the label of the triggered electrode 21.
In a first embodiment, as shown in fig. 3, each set of touch electrodes 2 includes two electrodes 21; all the electrodes 21 included in the touch electrodes 2 enclose a ring or a polygon, and two electrodes 21 included in the same touch electrode 21 are symmetrically arranged with respect to the center of the ring or the polygon. In this embodiment, as shown in fig. 3, there are three groups of touch electrodes 2, and the electrodes 21 included in the three groups of touch electrodes 2 are respectively denoted by TA, TB, and TC.
In another embodiment, as shown in fig. 4, all touch electrodes 2 are arranged in a row, and the electrodes 21 included in the same group of touch electrodes 2 are arranged in a column (in the case where they include a plurality of electrodes 21).
Based on the above triggering method of the capacitive touch switch with structured touch electrodes, the detection and determination system 1 detects whether the electrodes 21 included in each group of touch electrodes 2 generate a touch signal, and determines whether a preset triggering condition is formed according to the triggering condition, where the triggering condition is the number and the label of the electrodes 21 generating the touch signal at the same time, and the triggering condition may be set to any one or a combination of multiple triggering conditions except for the triggering condition that all the electrodes 21 generate the touch signal at the same time.
In the present embodiment, mainly the structure of the first embodiment is discussed, theoretically, there are many touch situations besides the trigger situation that all the electrodes 21 generate touch signals simultaneously, for example, the first embodiment has one electrode 21 labeled TA, TB, and TC triggered, two TAs triggered, two TBs triggered simultaneously with one TC, and so on, but in order to trigger naturally and ensure a high trigger success rate, it is better to adjust the trigger condition to a more natural trigger mode.
With the above trigger switch, when a finger touches the touch electrode 2 (see fig. 3 below), one or two groups of touch electrodes (specifically, the circumference of the circular ring formed by the touch electrodes 2) are pressed, so that the trigger condition can be set as that all the electrodes 21 included in one or more groups of touch electrodes 2 are touched to generate touch signals at the same time, and thus the touch switch structure can be more natural in touch operation of a user by matching with the trigger condition, and the user can trigger the touch switch by only touching two symmetrical sides of the circular ring or the polygon with two fingers, thereby reducing the learning cost; however, if the system device is in humid air or water environment, the electrodes 21(TA, TB, and TC) included in the three groups of touch electrodes 2 are all touched. Therefore, the detection and judgment system can judge whether the current trigger medium is a finger or moisture according to the number of triggered touch electrodes, and the touch switch is prevented from being triggered by moisture by mistake. Thus, when the system device works in water or a humid environment, the finger and the moisture can be distinguished.
According to the capacitive touch switch with the structured touch electrodes, the plurality of groups of touch electrodes are arranged, and the detection and judgment system is used for judging according to the triggering condition of the touch electrodes, so that the touch switch can be effectively prevented from being triggered by moisture or a humid environment, the structure is exquisite, the operation is convenient, and the reliability and the user experience of system equipment carrying the touch switch can be ensured.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (1)
1. A triggering method of a capacitive touch switch is characterized in that: the capacitive touch switch is applied to a capacitive touch switch with a structured touch electrode, the capacitive touch switch with the structured touch electrode comprises a detection judgment system (1) and at least two groups of touch electrodes (2), and each group of touch electrodes (2) is electrically connected with the detection judgment system (1); each group of touch electrodes (2) comprises one or more electrodes (21), and when a plurality of electrodes (21) are included, the electrodes (21) are connected through a lead;
the detection and judgment system (1) detects whether the electrodes (21) contained in each group of touch electrodes (2) generate touch signals or not, and judges whether a preset trigger condition is formed or not according to a trigger condition, wherein the trigger condition is the number and the labels of the electrodes (21) which generate the touch signals at the same time, and the trigger condition is set to be any one trigger condition or the combination of a plurality of trigger conditions except the trigger condition that all the electrodes (21) generate the touch signals at the same time;
specifically, the triggering condition is that all electrodes (21) contained in one or more groups of touch electrodes (2) are touched at the same time to generate a touch signal;
each set of the touch electrodes (2) comprises two electrodes (21); all the electrodes (21) included in the touch electrodes (2) enclose a ring or a polygon, two electrodes (21) included in the same touch electrode (21) are symmetrically arranged relative to the center of the ring or the polygon, and when all the electrodes (21) of one group of touch electrodes (2) or all the electrodes (21) of two groups of touch electrodes (2) are touched to generate touch signals at the same time, a trigger condition is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810008309.3A CN108092657B (en) | 2018-01-04 | 2018-01-04 | Capacitive touch switch with structured touch electrode and triggering method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810008309.3A CN108092657B (en) | 2018-01-04 | 2018-01-04 | Capacitive touch switch with structured touch electrode and triggering method thereof |
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| CN108092657A CN108092657A (en) | 2018-05-29 |
| CN108092657B true CN108092657B (en) | 2021-09-03 |
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| CN108092657A (en) | 2018-05-29 |
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