CN106411310B - Touch key, response method and system - Google Patents
Touch key, response method and system Download PDFInfo
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- CN106411310B CN106411310B CN201610932406.2A CN201610932406A CN106411310B CN 106411310 B CN106411310 B CN 106411310B CN 201610932406 A CN201610932406 A CN 201610932406A CN 106411310 B CN106411310 B CN 106411310B
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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
- H03K17/9618—Touch switches using a plurality of detectors, e.g. keyboard
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Abstract
The invention provides a touch key, a response method and a system, which are used for solving the problem that the conventional touch key cannot avoid false triggering. Wherein, touch button includes: a first touch key and a second touch key; a first touch key and a second touch key; the first touch key comprises a hollow area, and the second touch key is arranged in the hollow area.
Description
Technical Field
The present invention relates to the field of touch screens, and in particular, to a touch key, a response method and a system.
Background
At present, a copper foil with a certain area is left on a PCB (Printed Circuit Board, chinese name is printed circuit board) in a common capacitive touch key, the area of the copper foil is equal to the area of a finger of a person, and a very thin copper wire is led from the copper foil to be connected to an IC (touch chip) for signal acquisition. When a human finger touches the copper foil, the capacitance between the copper foil and the finger changes, the change can cause weak current change on the copper wire, and after the touch chip collects the current change, a key is considered to be pressed.
Touch keys have found widespread use in appliances, although in some waterproof devices, touch keys are structurally sealed, such as in washing machines, for example. However, if there is a drop of water on the touch key, the touch key may be triggered, causing malfunction.
In view of the above, if resistive touch is used, false triggering caused by water drops can be avoided. Resistive touches are not suitable for single key presses, which are commonly used in touch screens. At present, a capacitive touch key does not have a scheme for well avoiding similar false triggering, and most schemes utilize software to perform multiple filtering processing to avoid false triggering as much as possible. However, the software filtering is used, although false triggering of the touch key can be avoided to some extent. However, the possibility of all false triggers cannot be excluded, for example, there are drops on the keys, and the difference in size of the drops and the relative positions of the drops and the touch keys cause different capacitance changes, which all cause interference signals. The current touch key cannot know the condition that the periphery of the current touch key is touched or covered due to the limitation of the structure of the current touch key. When the touch key is used, only the trigger signal when the user touches the touch key by a finger is a correct signal, and as the software cannot filter the interference signal generated around the touch key, the interference signal cannot be completely distinguished from the correct signal, so that the false triggering of the key is caused.
Disclosure of Invention
The invention provides a touch key, a response method and a system, which are used for solving the problems that the touch area of the touch key in the prior art is smaller, the actual condition that the periphery of the touch key is touched or covered cannot be known, and whether the key is triggered by mistake cannot be judged according to the actual condition that the periphery of the touch key is touched or covered.
According to a first aspect of the present invention, there is provided a touch key comprising: a first touch key and a second touch key; the first touch key comprises a hollow area, and the second touch key is arranged in the hollow area.
The first touch key is in a ring shape.
The first touch key is a circular copper foil.
The second touch key is round.
According to a second aspect of the present invention, there is provided a touch key system, the system including the first touch key and the second touch key, the system further comprising: and the processor is used for determining whether to respond to the touch signal detected by the second touch key according to the touch signal detected by the first touch key and/or the second touch key.
Wherein, above-mentioned processor specifically is used for: and responding to the touch signal detected by the second touch key only when the second touch key detects the touch signal in the first touch key and the second touch key, and not responding to the touch signal detected by the second touch key otherwise.
Wherein, the processor is specifically used for: and responding to the touch signal detected by the second touch key only when the second touch key detects the touch signal and the duration of the touch signal is within the preset duration range in the first touch key and the second touch key, otherwise, not responding to the touch signal detected by the second touch key.
According to a third aspect of the present invention, there is provided a touch key response method, including: receiving touch signals detected by a first touch key and a second touch key, wherein the first touch key is arranged in a preset distance range taking the second touch key as a center; and determining whether to respond to the touch signal detected by the second touch key according to the touch signal detected by the first touch key and/or the second touch key.
Wherein determining whether to respond to the touch signal detected by the second touch key according to the touch signal detected by the first touch key and/or the second touch key comprises: and responding to the touch signal detected by the second touch key only when the second touch key detects the touch signal in the first touch key and the second touch key, otherwise, not responding to the touch signal detected by the second touch key.
Wherein determining whether to respond to the touch signal detected by the second touch key according to the touch signal detected by the first touch key and/or the second touch key comprises: and responding to the touch signal detected by the second touch key only when the second touch key detects the touch signal and the duration of the touch signal is within the preset duration range in the first touch key and the second touch key, otherwise, not responding to the touch signal detected by the second touch key.
According to the scheme provided by the embodiment of the invention, the additional touch keys are arranged in the preset distance range of one touch key, so that the condition that the periphery of the touch key is touched or covered can be determined according to the touch signal detected by the additional touch keys, whether the touch key is touched by mistake or not is further determined according to the condition, and the recognition efficiency of the touch key on a correct trigger signal is improved.
Drawings
FIG. 1 is a schematic illustration of a pass-through touch key provided in a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a touch key detection circuit provided in a first embodiment of the present invention;
FIG. 3 is a schematic diagram of a touch key system provided in a second embodiment of the present invention;
fig. 4 is a flowchart of a touch key response method provided in a third embodiment of the present invention.
Detailed Description
In order to solve the problem of false triggering of a touch key, which cannot be avoided in the prior art, the invention provides a touch key, a response method and a system, and the invention is further described in detail below with reference to the accompanying drawings and the embodiment. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
First embodiment
The embodiment provides a touch key, which mainly comprises the following components:
a first touch key and a second touch key; the first touch key is arranged in a preset distance range taking the second touch key as a center.
Preferably, the first touch key in this embodiment may include a hollow region, and the second touch key is disposed in the hollow region.
Fig. 1 is a schematic diagram of a preferred touch key provided in this embodiment, as shown in fig. 1, a first touch key 11 of the touch key is in a circular shape, a second touch key 12 is in a circular shape, the circle centers of the circles of the first touch key 11 and the second touch key 12 are the same, and the second touch key 12 is disposed inside a circular area formed by the first touch key 11.
In this embodiment, the first touch key may be a circular copper foil with a preset width, and the second touch key is a circular copper foil, but the first touch key and the second touch key related to the present invention are not limited to be made of copper foils, and may be made of other materials on the basis of meeting the requirements of capacitive touch keys.
The first touch key and the second touch key according to the present embodiment realize detection of a touch signal by the touch key detection circuit shown in fig. 2.
In fig. 2, "VCC" and "GND" are the positive and negative electrodes of the circuit power supply portion, respectively. "SW1" and "SW2" are the second touch key and the first touch key, respectively. "SCL" and "SDA" are communication lines between the touch chip and MCU (Microcontroller Unit, micro control unit). When the touch key is pressed, the touch chip transmits touch signals detected by the touch key to the MCU through the SCL and the SDA. And R1/R2/R3/R4/R5/R6 is a chip resistor.
Although two touch keys are shown in fig. 2, the "SW1" and "SW2" are used as one touch key in the PCB, and the function implemented is also a function of 1 touch key.
Second embodiment
The present embodiment provides a touch key system, which includes the first touch key and the second touch key in the first embodiment, and further includes a processor, where the processor is configured to determine whether to respond to the touch signal detected by the second touch key according to the touch signal detected by the first touch key and/or the second touch key.
Fig. 3 is a schematic diagram of a preferred touch key system (the MCU is not shown in the figure) of the touch key system provided in this embodiment, and as shown in fig. 3, SW1 is a circular copper foil, which is connected to R1 by a thin wire, and then connected to the touch chip IC1.SW2 is a ring of copper foil around SW1, connected to R2 by a thin wire, and then connected to the touch chip IC1.
SW1 is used to implement a touch function. When a finger of a person touches SW1, the touch chip acquires that the current flowing through R1 changes, and the SW1 is considered to be pressed down. When a finger of a person touches the copper foil of SW2, the touch chip also acquires a change in the current flowing through R2, and the SW2 is considered to be pressed down.
The SW2 is used to avoid false triggering of the SW1 if there is a drop of water near the key or if the key is continuously covered or pressed by some object. SW2 may be understood as an additional key of SW1, which functions not to implement the same touch function as SW1, but to detect whether the active area of SW1 is pressed.
SW1 may be a circular copper foil having a diameter of about 10 mm. If the SW1 and SW2 are pressed by the fingers of the person at the same time, the action at the moment is considered to be invalid; if the human finger presses only SW2, the finger is considered to deviate from the effective area of the key, and this action is also ineffective.
When the touch key is normally used, when the finger presses the SW1 and is not lifted, the touch chip finds that the SW1 is pressed, but does not send a signal to the MCU, and after the finger is lifted, the touch chip finds that the SW1 is lifted again and immediately sends a signal of 'just pressing the key' to the MCU. When a finger touches the SW2, no matter the SW2 is in a pressed or lifted state, the touch chip can acquire the state of the SW2, but does not send a signal to the MCU.
Specifically, when a water drop is dropped on a touch key, the recognition of the key by the touch key system according to the embodiment is divided into the following cases:
if it just drops in the active area of SW1, the touch chip will detect a signal that a key is pressed. But if the drop is always present, the key is deemed invalid after a preset period of time, e.g. a few seconds. If the water drops only wipe the keys, the keys are considered invalid because the time is short and the SW2 is touched; if the water drop area is large, covering SW1 and SW2, the key is considered invalid.
It should be noted that, in this embodiment, the touch chip and the MCU jointly implement the functions of the processor in this embodiment, and meanwhile, the touch signal that does not respond to the touch key in this embodiment may be understood as that the touch chip defaults that the touch key does not detect the touch signal, or the touch chip does not send the touch signal detected by the touch key to the MCU.
In this embodiment, the processor mainly has the following functions:
when the touch signals are detected to exist at the first touch key and the second touch key simultaneously, the touch signals at the first touch key and the second touch key are not responded; when detecting that only the first touch key exists in the first touch keys and the second touch keys, not responding to the touch signal at the first touch key; and when the duration of the time for detecting the touch signal at the second touch key is not within the preset time range, not responding to the touch signal at the second touch key.
The processor in this embodiment may specifically be configured to: and responding to the touch signal detected by the second touch key only when the second touch key detects the touch signal in the first touch key and the second touch key, otherwise not responding to the touch signal detected by the second touch key, or responding to the touch signal detected by the second touch key only when the second touch key detects the touch signal and the duration of the touch signal is within a preset duration range in the first touch key and the second touch key, otherwise not responding to the touch signal detected by the second touch key.
The touch key in the embodiment uses an effective key (second touch key) and an additional key (first touch key), so that the problem that the touch key is triggered by mistake is solved, and meanwhile, the touch key is further set to be "pop-up effective", so that the purpose of preventing the false touch is completely achieved.
Third embodiment
The present embodiment provides a touch key response method, and fig. 4 is a flowchart of the method, and as shown in fig. 4, the method includes the following processes:
step 401: receiving touch signals detected by a first touch key and a second touch key, wherein the first touch key is arranged in a preset distance range taking the second touch key as a center;
step 402: and determining whether to respond to the touch signal detected by the second touch key according to the touch signal detected by the first touch key and/or the second touch key.
The determining whether to respond to the touch signal detected by the second touch key according to the touch signal detected by the first touch key and/or the second touch key may specifically include: only in the first touch key and the second touch key, if only the second touch key detects a touch signal, responding to the touch signal detected by the second touch key, otherwise, not responding to the touch signal detected by the second touch key;
or, only in the first touch key and the second touch key, if only the second touch key detects a touch signal and the duration of the touch signal is within the preset duration range, responding to the touch signal detected by the second touch key, otherwise, not responding to the touch signal detected by the second touch key.
The method provided in this embodiment may be implemented by a touch chip, based on which, the touch chip defaults to the fact that the touch chip does not detect the touch signal in response to the touch key detection, or the touch chip does not send the touch signal detected by the touch key to the MCU, and meanwhile, the touch chip does not respond to the touch signal detected by the touch key, and the MCU may also understand that the MCU does not send the received touch signal as feedback according to the signal sent by the touch chip.
According to the embodiment, when the product needs to be waterproof and the number of keys is small, the false touch prevention effect is obvious. For each effective key, only one additional protection key (namely the first touch key in the embodiment) can be added, and the key lifting is set to be effective, so that the waterproof function can be completely realized. The performance is reliable and stable. For some waterproof products, the keys are required to be operated firstly, and then the waterproof products have good false touch prevention effect when put into operation under water.
Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, and accordingly the scope of the invention is not limited to the embodiments described above.
Claims (8)
1. A touch key, comprising:
a first touch key and a second touch key;
the first touch key comprises a hollow area, and the second touch key is arranged in the hollow area;
the first touch key and the second touch key are used for transmitting touch signals to a processor, and the processor is used for determining whether to respond to the touch signals detected by the second touch key according to the touch signals detected by the first touch key and/or the second touch key;
the method specifically comprises the following steps: the processor is used for responding to the touch signal detected by the second touch key only when the second touch key detects the touch signal in the first touch key and the second touch key, and not responding to the touch signal detected by the second touch key otherwise.
2. The touch key of claim 1, wherein the first touch key is annular.
3. The touch key of claim 1 or 2, wherein the first touch key is a circular copper foil.
4. The touch key of claim 1 or 2, wherein the second touch key is circular.
5. A touch key system, comprising the first touch key and the second touch key of any one of claims 1 to 4, the system further comprising:
a processor for determining whether to respond to the touch signal detected by the second touch key according to the touch signal detected by the first touch key and/or the second touch key;
the method specifically comprises the following steps: the processor is used for responding to the touch signal detected by the second touch key only when the second touch key detects the touch signal in the first touch key and the second touch key, and not responding to the touch signal detected by the second touch key otherwise.
6. The system of claim 5, wherein the processor is specifically configured to:
and responding to the touch signal detected by the second touch key only when the second touch key detects the touch signal and the duration of the touch signal is within a preset duration range in the first touch key and the second touch key, otherwise, not responding to the touch signal detected by the second touch key.
7. A touch key response method, comprising:
receiving touch signals detected by a first touch key and a second touch key, wherein the first touch key is arranged in a preset distance range taking the second touch key as a center;
determining whether to respond to the touch signal detected by the second touch key according to the touch signal detected by the first touch key and/or the second touch key;
the method specifically comprises the following steps: and responding to the touch signal detected by the second touch key only when the second touch key detects the touch signal in the first touch key and the second touch key, and not responding to the touch signal detected by the second touch key otherwise.
8. The method of claim 7, wherein the determining whether to respond to the touch signal detected by the second touch key based on the touch signal detected by the first touch key and/or the second touch key comprises:
and responding to the touch signal detected by the second touch key only when the second touch key detects the touch signal and the duration of the touch signal is within a preset duration range in the first touch key and the second touch key, otherwise, not responding to the touch signal detected by the second touch key.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610932406.2A CN106411310B (en) | 2016-10-31 | 2016-10-31 | Touch key, response method and system |
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| CN201610932406.2A CN106411310B (en) | 2016-10-31 | 2016-10-31 | Touch key, response method and system |
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| CN106411310A CN106411310A (en) | 2017-02-15 |
| CN106411310B true CN106411310B (en) | 2023-09-19 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107025438B (en) * | 2017-03-17 | 2020-01-14 | Oppo广东移动通信有限公司 | Method and terminal for improving fingerprint identification rate |
| CN107728522A (en) * | 2017-10-26 | 2018-02-23 | 广东美的厨房电器制造有限公司 | Mistaken touch prevention press key structure, false-touch prevention method and household electrical appliance |
| CN107965804A (en) * | 2017-12-19 | 2018-04-27 | 广东美的厨房电器制造有限公司 | Touch panel component, control method and gas kitchen ranges |
| CN110851810A (en) * | 2019-10-31 | 2020-02-28 | 维沃移动通信有限公司 | Response method and electronic equipment |
| CN111956077B (en) * | 2020-07-10 | 2023-07-18 | 九阳股份有限公司 | Control method of cooking equipment and cooking equipment |
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| CN102495682A (en) * | 2011-11-23 | 2012-06-13 | 江苏惠通集团有限责任公司 | Touch recognition method, device, spatial mouse and control method thereof |
| CN103607187A (en) * | 2013-11-12 | 2014-02-26 | 青岛歌尔声学科技有限公司 | Method and apparatus for detecting whether capacitor touch button is triggered |
| CN206164499U (en) * | 2016-10-31 | 2017-05-10 | 青岛海尔科技有限公司 | Touch key |
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| CN102495682A (en) * | 2011-11-23 | 2012-06-13 | 江苏惠通集团有限责任公司 | Touch recognition method, device, spatial mouse and control method thereof |
| CN103607187A (en) * | 2013-11-12 | 2014-02-26 | 青岛歌尔声学科技有限公司 | Method and apparatus for detecting whether capacitor touch button is triggered |
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