CN101833121A - Double-coupling detection circuit, rain sensor and rain identification method - Google Patents
Double-coupling detection circuit, rain sensor and rain identification method Download PDFInfo
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Abstract
The invention is applied to the technical field of electronic sensors, and provides a double-coupling detection circuit, a touch screen terminal, a rain sensor and an automobile. The double-coupling detection circuit comprises an induction electrode, a cross-coupling electrode, a first driving signal generating unit, a self-coupling electrode, a second driving signal generating unit, and an AD detection channel. The cross-coupling electrode is coupled to the induction electrode; the first driving signal generating unit drives the cross-coupling electrode; the self-coupling electrode is electrically connected with the induction electrode through a resistor or an equivalent resistor and is driven with the cross-coupling electrode at different time intervals; the second driving signal generating unit drives the self-coupling electrode and is connected with the self-coupling electrode; and the AD detection channel is used for receiving a detection signal input by the induction electrode. By combining the self-coupling and cross-coupling detection, the aim of effectively distinguishing the rain from human hands or other grounded conductors can be fulfilled through the simple detection circuit based on the capacitance detection technology with optimized stability and flexibility. Particularly, when the detection circuit is applied to an automotive windshield, the action of a wiper blade can be effectively detected. Therefore, the control of the automotive wiper blade can be more accurate.
Description
Technical field
The invention belongs to the electronic sensor technical field, relate in particular to a kind of double-coupling detection circuit, rain sensor and rain identification method.
Background technology
The rainfall detection technique that exists is nearly at present: groove etching metal detection, infrared induction detect and photoresistance detection, capacitive sensing detection etc.
The groove etching metal detection requires the rainfall inductor to be etched in the groove with double-level-metal in etched recesses on glass again, and rainwater flows to groove when raining, and makes short circuit metal, thereby reaches detection.This way difficulty height, dumb.
Infrared detection is that detecting device is installed in glass inner side, is reflected through glass by transmitter emission infrared ray, is received by receiver again.When rainy, glass surface is with water droplet, and infrarefraction is affected, and receiver is judged by receiving ultrared power and changing.This detection is subjected to the influence of factors such as extraneous light, glass light transmission, thickness of glass and degree of expansion easily, and its stability is limited.
It is to utilize when raining that the photoresistance induction detects, and light is sensed thereby raindrop have blocked part.It requires the certain threshold value of manual adjustments, and at the cloudy day or suddenly strong place enters under the situation such as the dark place of light (as tree shade or cross the tunnel) and also might survey by flase drop from light, its stability and automaticity are not good.
The capacitive sensing detection technique is divided into self coupling and mutual coupling detects, and the self coupling detection technique is the coupling capacitance situation of change that detects between induction electrode and the ground, and the mutual coupling technology is to detect the situation of change of coupling capacitance between induction electrode and the drive electrode.The capacitive sensing technology has certain induction sensitivity to raindrop, though the sensitivity meeting is determined by thickness of glass, but it is not influenced by light, glass light transmission and degree of expansion etc. can, and stability is better than above detection technique, but capacitance detecting is subjected to interference such as staff or other earth conductor equally easily.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of double-coupling detection circuit, is intended to solve the problem that the existing technical difficulty height of existing rainfall detection technique, very flexible, stability are not good, be subject to disturb.
The embodiment of the invention is achieved in that a kind of double-coupling detection circuit, comprising:
Induction electrode;
With the mutual coupling electrode that described induction electrode is coupled, be used to carry out mutual capacitance mode and detect;
To the first drive signal generating unit that described mutual coupling electrode drives, it is connected with described mutual coupling electrode;
Self coupling electrode by resistance or equivalent resistance are electrically connected with described induction electrode is used to carry out the self-capacitance mode detection;
To the second drive signal generating unit that described self coupling electrode drives, it is connected with described self coupling electrode;
The AD sense channel is used to receive the detection signal that described induction electrode is imported;
The described first drive signal generating unit carries out in the different periods the driving of described self coupling electrode with the described second drive signal generating unit the driving of described mutual coupling electrode.
The embodiment of the invention also provides a kind of touch screen terminal that comprises double-coupling detection circuit, and described double-coupling detection circuit comprises:
Induction electrode;
With the mutual coupling electrode that described induction electrode is coupled, be used to carry out mutual capacitance mode and detect;
To the first drive signal generating unit that described mutual coupling electrode drives, it is connected with described mutual coupling electrode;
Self coupling electrode by resistance or equivalent resistance are electrically connected with described induction electrode is used to carry out the self-capacitance mode detection;
To the second drive signal generating unit that described self coupling electrode drives, it is connected with described self coupling electrode;
The AD sense channel is used to receive the detection signal that described induction electrode is imported;
The described first drive signal generating unit carries out in the different periods the driving of described self coupling electrode with the described second drive signal generating unit the driving of described mutual coupling electrode.
The embodiment of the invention also provides a kind of rain sensor, comprises aforesaid double-coupling detection circuit.
The embodiment of the invention also provides a kind of automobile, and its windshield is equipped with wiper outward, can scrape at the corresponding described wiper of described windshield and be provided with aforesaid rain sensor in the zone of sweeping process.
The embodiment of the invention also provides a kind of rain identification method, may further comprise the steps:
Step a drives the mutual coupling electrode that is coupled with induction electrode, obtains the mutual coupling capacitance;
Drive the self coupling electrode that is electrically connected with induction electrode in the period different, obtain the self coupling capacitance with step a;
Step c if described mutual coupling capacitance and described self coupling capacitance all increase, then has been identified as rainfall and has existed.
The embodiment of the invention is based on stability and the more excellent capacitance detecting technology of dirigibility, detect in conjunction with self coupling and mutual coupling, can reach the purpose of distinguishing rainwater and staff or other earth conductor effectively by simple testing circuit structure, especially when being applied to shield glass, it can also detect the action of windscreen wiper sheet effectively, thereby can make the control of wiper more accurate.
Description of drawings
Fig. 1 is the structure principle chart of the double-coupling detection circuit that provides of the embodiment of the invention;
Fig. 2 A, Fig. 2 B, Fig. 2 C, Fig. 2 D are respectively the concrete structure design diagrams of mutual coupling electrode and induction electrode in the circuit structure diagram shown in Figure 1;
Fig. 3 is the equivalent-circuit model synoptic diagram when circuit structure shown in Figure 1 is used for the mutual coupling detection;
Fig. 4 is the equivalent-circuit model synoptic diagram when circuit structure shown in Figure 1 is used for the self coupling detection.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
In the embodiment of the invention, detect and the mutual coupling detection technique, realize distinguishing rainwater and staff or other earth conductor, can also be applied to the identification that touch screen terminal carries out touch operation simultaneously in conjunction with self coupling.
Fig. 1 shows the structural principle of the double-coupling detection circuit that the embodiment of the invention provides, and for convenience of description, only shows the part relevant with present embodiment.
With reference to Fig. 1, double-coupling detection circuit comprises mutual coupling electrode A 1, the self coupling electrode A 2 that is used to carry out the self-capacitance mode detection, induction electrode B and the first drive signal generating unit 1, the second drive signal generating unit 2, the AD sense channel 3 that is used to carry out the mutual capacitance mode detection.Wherein mutual coupling electrode A 1 is coupled with induction electrode B, and the first drive signal generating unit 1 is connected with mutual coupling electrode A 1, is used to drive mutual coupling electrode A 1.Self coupling electrode A 2 is electrically connected with induction electrode B by resistance or equivalent resistance R, the second drive signal generating unit 2 is connected with self coupling electrode A 2, be used to drive self coupling electrode A 2, and the driving of 2 pairs of self coupling electrode A 2 of the driving of 1 pair of mutual coupling electrode A 1 of the first drive signal generating unit and the second drive signal generating unit was carried out in the different periods, only drive as the current period, and next period is only driven by 2 pairs of mutual coupling electrode A 2 of the second drive signal generating unit by 1 pair of mutual coupling electrode A 1 of the first drive signal generating unit.
When above-mentioned testing circuit is worked, the relevant information of mutual coupling capacitor C x or self coupling electric capacity (Cx and C1 sum) can be reflected on the induction electrode B, AD sense channel 3 receives the detection signal of induction electrode B input, the first drive signal generating unit 1 wherein, the second drive signal generating unit 2 can adopt same control chip to realize, the first drive signal generating unit 1 and the second drive signal generating unit 2 are respectively two I/O output ports that replace output signal of this chip, and the testing result of AD sense channel 3 outputs also can export this chip to, AD also can be included in this chip internal simultaneously, whole testing process is triggered by this chip, carries out the subsequent control action by this chip according to testing result again.
The Cx that dotted line is represented among Fig. 1 is the coupling capacitance that forms between mutual coupling electrode A 1 and the induction electrode B, between induction electrode B and ground, can form stray capacitance during the circuit operate as normal, can also again induction electrode B be connect separately electric capacity or equivalent capacity during concrete enforcement, and formed stray capacitance constitutes parallel-connection structure between induction electrode B and the ground, and capacitor C 1 shown in Figure 1 is indication circuit stray capacitance and the electric capacity sum that inserts separately.C1 matches with the detection of self coupling and mutual coupling, determined the sensitivity and the stability that detect, therefore from principle of work at least this stray capacitance be indispensable.
In the embodiment of the invention, mutual coupling electrode A 1 is positioned at the outside of induction electrode B, be encirclement, semi-surrounding or both sides investing mechanism, Fig. 2 A and Fig. 2 B are respectively the structural designs that a kind of simple semi-surrounding and both sides surround, and Fig. 2 C then is the staggered semi-surrounding structural design of another kind of profile of tooth.Above-mentioned encirclement form all has following advantage: one, can make big as much as possible over against area between mutual coupling electrode A 1 and the induction electrode B, thereby realize that the mutual coupling electric capacity between them is big as far as possible under the certain situation of the electrode total area; Two, rainwater is fallen into this and could produce the better detecting effect in the interval, and is therefore higher over against the big more sensitivity that can make whole testing circuit detect rainwater of area; Three, mutual coupling electrode A 1 around, can shield the interference of outer bound pair induction electrode B; Four, do not receive drive signal when promptly being equivalent to ground connection when mutual coupling electrode A 1, can make induction electrode B that very big and stable electric capacity is arranged, thus near the influence of other earth conductor when self coupling detects, not being subject to.
Fig. 2 D is a kind of testing circuit of multi-electrode form, four isolated sub-mutual coupling electrodes of A11～A14, an induction electrode B and a self coupling drive electrode A2 are arranged among the figure, it has outside the advantage of Fig. 2 A～2C, because the mutual coupling drive electrode increases, induction sensitivity for rain (between electrode A 11 and induction electrode B) among a small circle is higher, during concrete enforcement, can select the sub-mutual coupling electrode of any amount.
Above induction electrode and drive electrode all are a kind of embodiment, equally also they can be implemented conversely, and promptly the self coupling electrode (it links to each other with induction electrode by resistance or equivalent resistance and forms an integral body) and the position of mutual coupling electrode are interchangeable.
Fig. 3 drives the 1 pair of mutual coupling electrode A 1 of the first drive signal generating unit among Fig. 1 (as driving by square-wave signal), the second drive signal generating unit 2 does not then drive self coupling electrode A 2 (2 pairs of self coupling electrode A of second drive signal generating unit this moment, 2 output direct currents, allow it be equivalent to exchange ground connection) time equivalent-circuit model, self coupling electrode A 2 is equivalent to ground connection at this moment, is applicable to that mutual coupling detects.
When carrying out the mutual coupling detection, if there is rainwater to exist, mutual coupling capacitor C x between mutual coupling electrode A 1 and the induction electrode B can increase, and staff (or wiper sheet) near the time, its mutual coupling capacitor C x can reduce, if under the environment of static state, detect, just can realize with the circuit model of Fig. 3 separately, but after starting, constantly passes through by wiper from induction pole, cause and detect under the continuous current intelligence that changes of electric capacity, system can't learn which variation is that interference by rainfall or windscreen wiper sheet is caused, therefore can not realize the control of rainfall size detection and wiper gear effectively.
Fig. 4 does not drive (1 pair of mutual coupling electrode A of first drive signal generating unit this moment, 1 output direct current to mutual coupling electrode A 1 with the first drive signal generating unit 1 among Fig. 1, allow it be equivalent to exchange ground connection), and the equivalent-circuit model of 2 pairs of self coupling electrode A 2 of the second drive signal generating unit when driving, mutual coupling this moment electrode A 1 is equivalent to ground connection, be applicable to that self coupling detects, so Cx has also become electric capacity, so the capacitor C here is equivalent to C1+Cx.
Detecting for self coupling, be rainwater, staff or windscreen wiper sheet to its influence all is consistent (presenting the variation of increase), so it when being used for detecting rainfall separately, is easy to be subjected to external influence and makes mistakes.
Two kinds of detection methods of comprehensive above Fig. 3 and Fig. 4 just can solve the various deficiencies and the problem of present existence, and the embodiment of the invention provides a kind of rain identification method hereby based on above testing circuit, specifically may further comprise the steps:
Step a drives the mutual coupling electrode that is coupled with induction electrode, obtains the mutual coupling capacitance;
Step b drives the self coupling electrode that is electrically connected with induction electrode in the period different with step a, obtains the self coupling capacitance;
Step c if the value of mutual coupling capacitor C x and the value of self coupling capacitor C all increase, then has been identified as rainfall and has existed.
Can be according to the unique affirmation rainfall of above-mentioned three steps, and make a distinction with other situation.
Consider other various situations in addition, said method further may further comprise the steps:
Steps d, the value of self coupling capacitor C increases if the value of mutual coupling capacitor C x reduces, and then is identified as the close of staff or earth conductor;
Otherwise e in steps then, the value of self coupling capacitor C reduces if the value of mutual coupling capacitor C x increases, then be identified as staff or earth conductor away from.
When above-mentioned rain identification method is applied to the automobile rainfall detection and need carries out wiper control according to testing result, further comprising the steps of:
Step f, if steps d and step e alternately occur, it is in running order then to be identified as wiper.
Simultaneously, grasp the duty of wiper, to guarantee the reliable and stable of it, can further include step g: the work at present gear of judging wiper according to the change frequency of mutual coupling capacitance among the step f and self coupling capacitance for making system., then be judged as and be operated in top grade when higher as change frequency, when low, then be judged as and be operated in low grade as change frequency.
Further, can also judge the concrete size of rainfall:
Step h in wiper is scraped the Preset Time of the POS INT of sweeping the process induction electrode, judges the size of rainfall by the size that detects data mutual coupling capacitance and self coupling capacitance variation amount.After detecting wiper and just having passed through induction electrode B, can by detecting the size of data variation amount in a period of time that begins from this moment point, can know having or not and size of rainfall by with this time point to start with constantly.
Above-mentioned double-coupling detection circuit can be used for the rain sensor of automobile, and the rain sensor that will comprise above-mentioned double-coupling detection circuit is arranged on the inboard of windshield, and the corresponding wiper of installing outside windshield can be scraped the zone of sweeping process.
The double-coupling detection circuit that the embodiment of the invention provides can embody the great advantage except the detection to vehicle wiper, it is same feasible detecting for the rainfall under other environment, such as controlling the automatic window of opening and closing, can also be applied to the identification that touch screen terminal carries out touch operation simultaneously by detecting rainfall.
The embodiment of the invention is based on stability and the more excellent capacitance detecting technology of dirigibility, detect in conjunction with self coupling and mutual coupling, can reach the purpose of distinguishing rainwater and staff or other earth conductor effectively by simple testing circuit structure, especially when being applied to shield glass, it can also detect the action of windscreen wiper sheet effectively, thereby can make the control of wiper more accurate.Further with the structure of mutual coupling electrode design for the encirclement induction electrode, make between the two big as much as possible over against area and mutual coupling electric capacity, what rainwater was fallen into both could produce the better detecting effect in the interval, therefore higher over against the big more precision that can make whole detecting electrode detect rainwater of area, and the mutual coupling electrode is around induction electrode, can shield the interference of outer bound pair induction electrode, when the mutual coupling electrode does not receive drive signal when promptly being equivalent to ground connection, can make induction electrode that very big and stable electric capacity is arranged, thus near the influence of other earth conductor when self coupling detects, not being subject to.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. a double-coupling detection circuit is characterized in that, comprising:
Induction electrode;
With the mutual coupling electrode that described induction electrode is coupled, be used to carry out mutual capacitance mode and detect;
To the first drive signal generating unit that described mutual coupling electrode drives, it is connected with described mutual coupling electrode;
Self coupling electrode by resistance or equivalent resistance are electrically connected with described induction electrode is used to carry out the self-capacitance mode detection;
To the second drive signal generating unit that described self coupling electrode drives, it is connected with described self coupling electrode;
The AD sense channel is used to receive the detection signal that described induction electrode is imported;
The described first drive signal generating unit carries out in the different periods the driving of described self coupling electrode with the described second drive signal generating unit the driving of described mutual coupling electrode.
2. double-coupling detection circuit as claimed in claim 1 is characterized in that, described induction electrode is by electric capacity or equivalent capacity ground connection.
3. double-coupling detection circuit as claimed in claim 1 is characterized in that, described mutual coupling electrode is positioned at described induction electrode outside, is encirclement, semi-surrounding or both sides investing mechanism.
4. double-coupling detection circuit as claimed in claim 1 is characterized in that, described mutual coupling electrode comprises a plurality of sub-mutual coupling electrodes.
5. double-coupling detection circuit as claimed in claim 1 is characterized in that, the position of described mutual coupling electrode and described self coupling electrode is interchangeable.
6. a touch screen terminal is characterized in that, comprises double-coupling detection circuit; Described double-coupling detection circuit comprises:
Induction electrode;
With the mutual coupling electrode that described induction electrode is coupled, be used to carry out mutual capacitance mode and detect;
To the first drive signal generating unit that described mutual coupling electrode drives, it is connected with described mutual coupling electrode;
Self coupling electrode by resistance or equivalent resistance are electrically connected with described induction electrode is used to carry out the self-capacitance mode detection;
To the second drive signal generating unit that described self coupling electrode drives, it is connected with described self coupling electrode;
The AD sense channel is used to receive the detection signal that described induction electrode is imported;
The described first drive signal generating unit carries out in the different periods the driving of described self coupling electrode with the described second drive signal generating unit the driving of described mutual coupling electrode.
7. a rain sensor is characterized in that, comprises as each described double-coupling detection circuit of claim 1 to 5.
8. automobile, its windshield is equipped with a wiper outward, it is characterized in that, can scrape at the corresponding described wiper of described windshield and be provided with rain sensor as claimed in claim 7 in the zone of sweeping process.
9. a rain identification method is characterized in that, may further comprise the steps:
Step a drives the mutual coupling electrode that is coupled with induction electrode, obtains the mutual coupling capacitance;
Step b drives the self coupling electrode that is electrically connected with induction electrode in the period different with step a, obtains the self coupling capacitance;
Step c if described mutual coupling capacitance and described self coupling capacitance all increase, then has been identified as rainfall and has existed.
10. rain identification method as claimed in claim 9 is characterized in that, and is further comprising the steps of:
Steps d, described self coupling capacitance increases if described mutual coupling capacitance reduces, and then is identified as the close of staff or earth conductor;
Step e, described self coupling capacitance reduces if described mutual coupling capacitance increases, then be identified as staff or earth conductor away from.
11. rain identification method as claimed in claim 9 is characterized in that, also following steps:
Step f, if described steps d and described step e alternately occur, it is in running order then to be identified as wiper.
12. rain identification method as claimed in claim 9 is characterized in that, also following steps:
Step g is judged the work at present gear of wiper according to the change frequency of mutual coupling capacitance among the described step f and self coupling capacitance.
13. rain identification method as claimed in claim 9 is characterized in that, also following steps:
Step h in wiper is scraped the Preset Time of the POS INT of sweeping the process induction electrode, judges the size of rainfall by the size that detects data mutual coupling capacitance and self coupling capacitance variation amount.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102006048A (en) * | 2010-12-24 | 2011-04-06 | 江苏惠通集团有限责任公司 | Key detecting board |
| CN102073426A (en) * | 2010-12-29 | 2011-05-25 | 广东中显科技有限公司 | Touch inductive circuit |
| CN102968235A (en) * | 2012-11-27 | 2013-03-13 | 深圳市汇顶科技股份有限公司 | Touch detection method, system and touch control terminal of touch sensor |
| CN103616977A (en) * | 2013-12-04 | 2014-03-05 | 深圳市汇顶科技股份有限公司 | Touch detection system, detection method of touch detection system and touch screen terminal |
| CN104346015A (en) * | 2013-07-29 | 2015-02-11 | Lg伊诺特有限公司 | Touch window and touch device the same |
| US9529475B2 (en) | 2012-08-30 | 2016-12-27 | Huawei Device Co., Ltd. | Method for calibration of capacitive touch screen and capacitive touch apparatus |
| WO2021088551A1 (en) * | 2019-11-06 | 2021-05-14 | 苏州宝时得电动工具有限公司 | Electric tool and automatic recognition method in electric tool |
| WO2021208156A1 (en) * | 2020-04-13 | 2021-10-21 | 北京他山科技有限公司 | Hover button sensor unit and method for triggering hover button |
| CN115185018A (en) * | 2022-07-12 | 2022-10-14 | 中庆建设有限责任公司 | Road rain and snow sensing device and road rain and snow judging method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6094981A (en) * | 1998-09-25 | 2000-08-01 | Itt Automotive Electrical Systems, Inc. | Capacitive rain sensor for windshield |
| US6373263B1 (en) * | 2000-04-20 | 2002-04-16 | Millennium Sensors Ltd. | Differential windshield capacitive rain sensor |
| CN101449131A (en) * | 2006-03-29 | 2009-06-03 | 罗斯蒙德公司 | Capacitance sensing circuit |
| CN101583923A (en) * | 2007-01-03 | 2009-11-18 | 苹果公司 | Multi-touch auto scanning |
-
2010
- 2010-04-09 CN CN2010101471757A patent/CN101833121B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6094981A (en) * | 1998-09-25 | 2000-08-01 | Itt Automotive Electrical Systems, Inc. | Capacitive rain sensor for windshield |
| US6373263B1 (en) * | 2000-04-20 | 2002-04-16 | Millennium Sensors Ltd. | Differential windshield capacitive rain sensor |
| CN101449131A (en) * | 2006-03-29 | 2009-06-03 | 罗斯蒙德公司 | Capacitance sensing circuit |
| CN101583923A (en) * | 2007-01-03 | 2009-11-18 | 苹果公司 | Multi-touch auto scanning |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102006048A (en) * | 2010-12-24 | 2011-04-06 | 江苏惠通集团有限责任公司 | Key detecting board |
| CN102006048B (en) * | 2010-12-24 | 2013-03-27 | 江苏惠通集团有限责任公司 | Key detecting board |
| CN102073426A (en) * | 2010-12-29 | 2011-05-25 | 广东中显科技有限公司 | Touch inductive circuit |
| US9529475B2 (en) | 2012-08-30 | 2016-12-27 | Huawei Device Co., Ltd. | Method for calibration of capacitive touch screen and capacitive touch apparatus |
| CN102968235B (en) * | 2012-11-27 | 2015-12-02 | 深圳市汇顶科技股份有限公司 | The touch detecting method of touch sensor, system and touch control terminal |
| CN102968235A (en) * | 2012-11-27 | 2013-03-13 | 深圳市汇顶科技股份有限公司 | Touch detection method, system and touch control terminal of touch sensor |
| US10241632B2 (en) | 2012-11-27 | 2019-03-26 | Shenzhen GOODIX Technology Co., Ltd. | Touch detecting method, touch detecting system and touch terminal for touch sensor |
| CN104346015A (en) * | 2013-07-29 | 2015-02-11 | Lg伊诺特有限公司 | Touch window and touch device the same |
| CN104346015B (en) * | 2013-07-29 | 2019-02-22 | Lg伊诺特有限公司 | Touch window and the touching device including it |
| CN103616977A (en) * | 2013-12-04 | 2014-03-05 | 深圳市汇顶科技股份有限公司 | Touch detection system, detection method of touch detection system and touch screen terminal |
| CN103616977B (en) * | 2013-12-04 | 2017-03-29 | 深圳市汇顶科技股份有限公司 | Touch detecting system and its detection method, touch screen terminal |
| WO2021088551A1 (en) * | 2019-11-06 | 2021-05-14 | 苏州宝时得电动工具有限公司 | Electric tool and automatic recognition method in electric tool |
| WO2021208156A1 (en) * | 2020-04-13 | 2021-10-21 | 北京他山科技有限公司 | Hover button sensor unit and method for triggering hover button |
| CN115185018A (en) * | 2022-07-12 | 2022-10-14 | 中庆建设有限责任公司 | Road rain and snow sensing device and road rain and snow judging method |
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Owner name: SHENZHEN GOODIX TECHNOLOGY CO., LTD. Free format text: FORMER NAME: SHENZHEN GOODIX TECHNOLOGY LTD. |
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Address after: 13 floor, block B, Futian Free Trade Zone, Shenzhen, Guangdong, China, Patentee after: Shenzhen Huiding Technology Co., Ltd. Address before: 13 floor, block B, Futian Free Trade Zone, Shenzhen, Guangdong, China, Patentee before: Shenzhen Goodix Technology Ltd. |