CN108092657A - A kind of capacitor type touch switch and its triggering method of touch electrode structuring - Google Patents

Abstract

The invention discloses a capacitive touch switch with structured touch electrodes and a trigger method thereof. The touch switch includes a detection and judgment system and at least two groups of touch electrodes, and each group of touch electrodes is electrically connected to the detection and judgment system; each group of touch electrodes includes a or a plurality of electrodes, and when a plurality of electrodes are included, the electrodes are connected by wires. The trigger method is as follows: the detection and judgment system detects whether the electrodes contained in each group of touch electrodes generate touch signals, and judges whether the preset trigger conditions are constituted according to the trigger conditions. The trigger conditions are the number and labels of the electrodes that generate touch signals at the same time. The touch electrode-structured capacitive touch switch of the present invention can effectively prevent false triggering of the touch switch by moisture or a humid environment by setting multiple sets of touch electrodes and making judgments based on the triggering conditions of the touch electrodes through a detection and judgment system, and has a compact structure. The operation is convenient, which can ensure the reliability and user experience of the system equipment equipped with the touch switch.

Description

A capacitive touch switch with touch electrode structure and its triggering method

technical field

The invention relates to the field of touch sensing switches, in particular to a capacitive touch switch with structured touch electrodes and a triggering method thereof.

Background technique

Touch-sensitive switches are rapidly being applied in many fields because of their low cost, sturdiness, wear resistance, insulation, dust-proof, water-proof, etc., and various appearance designs. However, in a humid or water environment, the touch switch is prone to false triggering, causing system equipment to malfunction and affecting product reliability and customer experience.

A capacitive touch switch is mainly composed of a touch electrode, a detection and judgment system, and a switch trigger medium. The switch trigger medium is generally a finger, as shown in Figure 1.

When the touch electrode is not touched by the switch trigger medium (finger), the detection and judgment system detects the initial capacitance C ₀ on the touch electrode, and the detection and judgment system considers the touch switch to be in the OFF state.

When the switch trigger medium touches the touch electrode, the detection and judgment system detects that the capacitance on the touch electrode changes to C _t . The detection and judgment system judges that the condition of C _t >C ₀ is established, and considers that the touch electrode is triggered, and the touch switch is in an ON state.

However, when the system equipment based on this type of switch works in a humid or water environment, the moisture will cause false triggering of the switch of the equipment.

Contents of the invention

Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a capacitive touch switch with a touch electrode structure and a trigger method that can be used in water or a humid environment without false triggering.

Technical solution: In order to achieve the above object, the touch electrode structured capacitive touch switch of the present invention includes a detection and judgment system and at least two groups of touch electrodes, each group of touch electrodes is electrically connected to the detection and judgment system; each group of touch electrodes includes One or more electrodes, when multiple electrodes are included, the electrodes are connected by wires.

Further, each set of touch electrodes includes two electrodes; the electrodes included in all the touch electrodes form a ring or polygon, and the two electrodes included in the same touch electrode are arranged symmetrically with respect to the center of the ring or polygon.

Further, all the touch electrodes are arranged in a row, and the electrodes included in the same group of touch electrodes are arranged in a row.

Further, there are three groups of touch electrodes.

Further, the detection and judgment system includes a touch chip or a microcontroller.

Based on the touch electrode structured capacitive touch switch trigger method above, the detection and judgment system detects whether the electrodes contained in each group of touch electrodes generate touch signals, and judges whether a preset trigger condition is constituted according to the trigger situation. The trigger situation is as follows: The number and tags of electrodes that generate touch signals at the same time, and the trigger conditions can be set to any trigger situation or a combination of multiple trigger situations except the trigger situation that all electrodes generate 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 simultaneously to generate touch signals.

Further, each group of touch electrodes includes two electrodes; the electrodes included in all touch electrodes form a ring or polygon, and the two electrodes included in the same touch electrode are arranged symmetrically with respect to the center of the ring or polygon. When there is a group of touch electrodes at the same time All the electrodes of the electrodes or all the electrodes of the two groups of touch electrodes are touched to generate a touch signal, which constitutes a trigger condition.

Beneficial effects: the touch electrode structured capacitive touch switch of the present invention can effectively prevent false triggering of the touch switch by moisture or humid environment by setting multiple sets of touch electrodes and making judgments based on the triggering conditions of the touch electrodes through the detection and judgment system. The structure is exquisite and the operation is convenient, which can ensure the reliability and user experience of the system equipment equipped with the touch switch.

Description of drawings

Accompanying drawing 1 is the composition diagram of traditional trigger switch;

Accompanying drawing 2 is the structural diagram of the capacitive touch switch of touch electrode structure;

Accompanying drawing 3 is the layout drawing of touch electrode.

Accompanying drawing 4 is the touch electrode layout diagram of the second embodiment.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

The capacitive touch switch with touch electrode structure as shown in Figure 2 includes a detection and judgment system 1 and at least two groups of touch electrodes 2, each group of touch electrodes 2 is electrically connected to the detection and judgment system 1; each group of touch electrodes 2 One or more electrodes 21 are included, and when multiple electrodes 21 are included, the electrodes 21 are connected by wires. The detection and judgment system 1 includes a touch chip or a microcontroller. The detection and judgment system 1 detects the touch of the electrode 21 , and judges whether it is a human touch or a touch caused by moisture according to the touch. In order to facilitate the detection and judgment of the detection and judgment system 1, all 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 constituted according to the label of the triggered electrode 21.

In the first embodiment, as shown in FIG. 3 , each group of touch electrodes 2 includes two electrodes 21; the electrodes 21 included in all touch electrodes 2 form a ring or polygon, and the two electrodes 21 included in the same touch electrode 21 Each electrode 21 is arranged symmetrically with respect to the center of the ring or polygon. In this embodiment, as shown in FIG. 3 , there are three groups of touch electrodes 2 , and the labels of the electrodes 21 included in the three groups of touch electrodes 2 are TA, TB, and TC, respectively.

In another embodiment, as shown in FIG. 4 , all the 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 row (in case it includes a plurality of electrodes 21 ).

Based on the touch electrode structured capacitive touch switch trigger method, the detection and judgment system 1 detects whether the electrodes 21 included in each group of touch electrodes 2 have a touch signal, and judges whether a preset trigger condition is constituted according to the trigger situation, The trigger situation is the number and tags of the electrodes 21 that generate touch signals at the same time, and the trigger condition can be set to any trigger situation or a combination of multiple trigger situations except that all electrodes 21 generate touch signals at the same time.

This embodiment mainly discusses the structure of the first embodiment. In theory, there are many other touch situations besides the trigger situation where all electrodes 21 generate touch signals at the same time. For example, in the first embodiment, each has a label of The electrodes 21 of TA, TB, and TC are triggered, two TAs are triggered, two TBs and one TC are triggered at the same time, etc., but in order to trigger naturally and ensure a high trigger success rate, it is best to adjust the trigger conditions to be more natural trigger method.

Using the above-mentioned trigger switch, when the finger touches the touch electrode 2 (as shown in Figure 3 below), one or two groups of touch electrodes (determined by the circumference of the circle formed by the touch electrode 2) will be pressed, so the trigger The condition is that all the electrodes 21 contained in one or more groups of touch electrodes 2 are touched to generate touch signals at the same time, so that the touch switch structure cooperates with this trigger condition to make the user's touch operation more natural, and the user only needs two fingers to touch The two symmetrical sides of the ring or polygon can be triggered, which reduces the learning cost; but if the system equipment is in humid air or in a water environment, the electrodes 21 (TA, TB and TC) will be touched. Therefore, the detection and judgment system can judge whether the current trigger medium is a finger or water according to the number of touch electrodes being triggered, so as to avoid the touch switch being falsely triggered by water. In this way, when the system equipment works in water or in a humid environment, the distinction between fingers and moisture can be realized.

The touch electrode-structured capacitive touch switch of the present invention can effectively prevent false triggering of the touch switch by moisture or a humid environment by setting multiple sets of touch electrodes and making judgments based on the triggering conditions of the touch electrodes through a detection and judgment system, and has a compact structure. The operation is convenient, which can ensure the reliability and user experience of the system equipment equipped with the touch switch.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also possible. It should be regarded as the protection scope of the present invention.

Claims (8)

1. a kind of capacitor type touch switch of touch electrode structuring, it is characterised in that：Including detection judgement system (1) and extremely Few two groups of touch electrodes (2), every group of touch electrode (2) are electrically connected the detection judgement system (1)；Every group of touch electrode (2) Including one or more electrodes (21), when including multiple electrodes (21), electrode is connected between (21) by conducting wire.

2. a kind of capacitor type touch switch of touch electrode structuring according to claim 1, it is characterised in that：Every group of institute Stating touch electrode (2) includes two electrodes (21)；The electrode (21) that all touch electrodes (2) include surrounds an annular or polygon Shape, two electrodes (21) that same touch electrode (21) includes are compared with annular or the center symmetric setting of polygon.

3. a kind of capacitor type touch switch of touch electrode structuring according to claim 1, it is characterised in that：It is all to touch It touches electrode (2) to be arranged in a row, electrode (21) row that same group of touch electrode (2) includes are arranged into one.

4. a kind of capacitor type touch switch of touch electrode structuring according to claim 2, it is characterised in that：It is described to touch Touching electrode (2) has three groups.

5. a kind of capacitor type touch switch of touch electrode structuring according to claim 1, it is characterised in that：The inspection Surveying judgement system (1) includes touching chip or microcontroller.

6. the triggering method based on the capacitor type touch switch of touch electrode structuring described in claim 1, it is characterised in that：Institute It states detection and judges that system (1) detects whether the electrode (21) that every group of touch electrode (2) includes has touch signal generation, and according to tactile Heat shape judges whether to form default trigger condition, and trigger condition generates the number of the electrode (21) of touch signal for the same time Amount and label, trigger condition may be configured as except all electrodes (21) while generate this trigger condition of touch signal in addition to any one The combination of kind trigger condition or a variety of trigger conditions.

7. the triggering method of the capacitor type touch switch of touch electrode structuring according to claim 6, it is characterised in that： Trigger condition generates touch signal to there is all electrodes (21) that one or more groups of touch electrodes (2) include to be touched simultaneously.

8. the triggering method of the capacitor type touch switch of touch electrode structuring according to claim 7, it is characterised in that： Touch electrode (2) described in every group includes two electrodes (21)；The electrode (21) that all touch electrodes (2) include surrounds an annular Or polygon, two electrodes (21) that same touch electrode (21) includes compared with annular or polygon center symmetric setting, It is touched when having all electrodes (21) of one group of touch electrode (2) or all electrodes (21) of two groups of touch electrodes (2) simultaneously Touch signal is generated, forms trigger condition.