CN102427354A - Key switch with current simulation touch feedback and touch sensitive display - Google Patents
Key switch with current simulation touch feedback and touch sensitive display Download PDFInfo
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- CN102427354A CN102427354A CN2011102319272A CN201110231927A CN102427354A CN 102427354 A CN102427354 A CN 102427354A CN 2011102319272 A CN2011102319272 A CN 2011102319272A CN 201110231927 A CN201110231927 A CN 201110231927A CN 102427354 A CN102427354 A CN 102427354A
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- touch
- key switch
- sparking electrode
- sensitive display
- transducer
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/016—Input arrangements with force or tactile feedback as computer generated output to the user
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
Abstract
The invention relates to a key switch with current simulation touch feedback and a touch sensitive display. The key switch comprises at least one sensor, at least one discharge electrode and a control unit, wherein the sensor detects operation of an operator on the surface of the key switch and generates a first signal; the discharge electrode generates a potential difference point by point in at least one region of the surface of the key switch and outputs a controllable current; and the control unit is connected with the at least one sensor and the at least one discharge electrode and generates a second signal based on the first signal to control the discharge electrode. The touch sensitive display comprises at least one sensor, at least one discharge electrode, a display medium and a control unit, wherein the discharge electrode generates a potential difference point by point in at least one region of the surface of the touch sensitive display and outputs a controllable current; and the control unit generates a second signal based on the first signal to control the discharge electrode. The key switch with current simulation touch feedback and the touch sensitive display can realize current touch feedback and expand the operating feedback ability.
Description
Quoting of related application
The application number 201010251785.1 that the application requires to submit to Patent Office of the People's Republic of China on August 12nd, 2010, denomination of invention are incorporated its full content for the patent application of " touch-sensitive display with current analog tactile feedback " and the application number submitted to Patent Office of the People's Republic of China on July 14th, 2011 are 201110196604.4, denomination of invention is the priority of the patent application of " key switch with current analog tactile feedback " at this by reference.
Technical field
The present invention relates to Electronic Control and demonstration field, relate more specifically to a kind of key switch and touch-sensitive display with current analog tactile feedback.
Background technology
As everyone knows, in Electronic Control and demonstration field, use various key switches and touch-sensitive display to realize the man-machine interaction of people and relevant device widely.For example, the mouse of traditional calculating machine and keyboard, mobile phone operation button and touch-screen or the like may be used to man-machine interaction, to realize that the instruction input of relevant device is perhaps obtained feedback information from relevant device.
In the prior art; Receive the mechanical movement feedback of pushing the back generation to the most surfaces of the operational feedback of this key switch or touch-sensitive display itself, possibly be attended by corresponding audio frequency output or video demonstration simultaneously to feed back for key switch or touch-sensitive display.
Yet through these modes, feedack is comparatively single.For example, disclose a kind of vapour-pressure type button at patent documentation 201020281858.7, it adopts the mode of gas pressure to improve the sense of touch of conventional keys, but still can't between key switch and operator, realize rich and varied tactile feedback information.
In addition, audio frequency output feedback receives the interference of noisy external environment easily, and video shows that feedback depends on external environment too.For example, the daylight or the light of direct projection or reflection possibly cause the operator can't see the video content that shows on the touch-sensitive display clearly.
To this, patent documentation US4,885; 565 disclose a kind of quick monitor that touches; Wherein touch the feedback that the input of carrying out triggers sense of touch through the user, triggered the mode of mechanical shock by microprocessor and handle oscillator coil, this mechanical shock causes monitor case to vibrate; Thereby outside additional sound equipment feedback, the user can also experience mechanical oscillation.
Yet the shortcoming of this scheme is, even carry out different inputs through touch, identical tactile feedback also occurs, has only with original sound equipment feedback to interrelate and could distinguish more accurately.
For this reason, need the operational feedback ability of expansion key switch and touch-sensitive display, make the tactile feedback information that in operation push-button switch or touch-sensitive display, can obtain to enrich.
Summary of the invention
The above-mentioned shortcoming that exists when carrying out operational feedback to key switch in the prior art and touch-sensitive display; The present invention adopts current analog sense of touch technology to realize the tactile feedback to key switch or touch-sensitive display, with the operational feedback ability of expansion traditional key-press switch or touch-sensitive display.Particularly, current analog sense of touch technology excites the sense of touch on human finger surface neural through the voltage of about several hectovolts and very faint electric current, thereby modulates different senses of touch.In itself, current analog sense of touch technology type is similar to electric shock, but is Protean through the sensation that weak current causes, thereby can simulate polyesthesias such as vibration, pressure, heat, and strong and weak controlled.Therefore, the present invention in key switch and touch-sensitive display, and then enriches operator's tactile feedback with current analog sense of touch technical application.
According to an aspect of the present invention, a kind of key switch with current analog tactile feedback is provided, this key switch comprises: at least one transducer, and the operation that the detecting operation person is surperficial to key switch, and produce first signal; At least one sparking electrode, pointwise ground produces potential difference at least one zone on said key switch surface, and exports controlled electric current; Control unit is connected with said at least one transducer, said at least one sparking electrode, produces secondary signal based on first signal and controls sparking electrode.
According to a further aspect in the invention, a kind of touch-sensitive display with current analog tactile feedback is provided, this touch-sensitive display comprises: at least one transducer, detect the operation to the touch-sensitive display surface to the operator, and produce first signal; At least one sparking electrode, pointwise ground produces potential difference at least one zone on touch-sensitive display surface, and exports controlled electric current; Display medium; Control unit is connected with said at least one transducer, said at least one sparking electrode and said display medium, produces secondary signal with the control sparking electrode based on first signal.
According to key switch and the touch-sensitive display with electric current tactile feedback of the present invention, can be so that the operator obtain abundant tactile feedback information when operation push-button switch or touch-sensitive display, and suppress or eliminate the interference of external environment to feedback information.
Description of drawings
Come illustration the preferred embodiments of the present invention by means of accompanying drawing below.In the accompanying drawings:
Fig. 1 is the diagram structural representation with key switch of current analog tactile feedback according to an embodiment of the invention;
Fig. 2 is the structural representation of the diagram key switch with current analog tactile feedback according to another embodiment of the present invention;
Fig. 3 is the diagram structural representation with touch-sensitive display of current analog tactile feedback according to an embodiment of the invention; And
Fig. 4 is the structural representation of the diagram touch-sensitive display with current analog tactile feedback according to another embodiment of the present invention.
Embodiment
At first, as shown in Figure 1, illustrate the key switch with current analog tactile feedback according to an embodiment of the invention.As shown in Figure 1, this key switch comprises: Sensor section S1 wherein is provided with at least one transducer; Discharge electrode part S2 has a plurality of sparking electrode E
1, E
2... .E
MAnd control unit VP, the transducer among itself and the Sensor section S1 and each the sparking electrode E among the discharge electrode part S2
1, E
2... .E
MConnect.At this,, only schematically show the most important part that realizes the present invention's design in the accompanying drawings, and omitted description other part in order to simplify description to inventive concept of the present invention.For example; With traditional capacitance type sensor that keyboard was adopted is example, and the complete structure of Sensor section S1 also should comprise the corresponding mechanical structure that aiding sensors is realized keypress function, like shell, the button cap of keyboard; Perhaps under the situation of traditional mouse, also comprise shell of mouse or the like.
Sensor operator is to the operation on key switch surface and produce first signal at least, can confirm the mode of operation (for example, cartesian coordinate) of operator to key switch at least based on said first signal.
Above Sensor section S1, arrange discharge electrode part S2, discharge electrode part S2 comprises a plurality of sparking electrode E
2... .E
M, and comprise the part that corresponding plane covers body, insulator and the lead that is connected with control unit, mechanical structure etc. or control unit.Sparking electrode can be processed by various electric conducting materials commonly used.For example, in this embodiment, sparking electrode adopts conductive rubber to process.As modification, can also adopt " ito thin film " perhaps materials such as " flexible conducting materials " process sparking electrode.
The arrangement of two part S1, S2 makes sparking electrode E
1... E
MCan produce potential difference at the upper surface of key switch, the controlled electric current of output between while and operator's the contact portion.Change in current can constitute difference " operational feedback information " even " current pattern ", makes feedback information on the conventional keys switch by greatly expansion, and is not limited to the navigation key, numeral/character keys etc. of the definition on the conventional keys switch.For example; Through control, make the operator when contacting, experience the response that operated key switch produces, promptly with sparking electrode to sparking electrode; The controlled electric current that sparking electrode produces, and this sensation can change through the difference control to sparking electrode.When using such key switch, can make the dysopia patient directly experience the state and the response of the key switch of operation especially at the terminal that is used for the dysopia patient.
On the other hand; Thereby can make resetting of the virtual key of this key switch generation and lock the operation sense that approaches real object through suitable control; And even the size that can also accurately regulate the sparking electrode output current; In the output of the true sense of touch of surface simulation of key switch, show the figure that electric current constitutes, and feel the physical attribute of temperature, texture, hardness or the like of virtual objects in the picture through electric current.What this feedback intuitively guaranteed operator and key switch has higher reliability alternately, suppress or eliminate owing to external interference noise or illuminating position to mutual adverse effect.
According to one embodiment of present invention, key switch can be a kind of key switch that is divided into double-layer structure.Wherein be provided with at least one transducer in the ground floor, to detect the operation of key switch and to produce first signal, first signal is confirmed the mode of operation to key switch at least.Above ground floor, lay the second layer; Be provided with at least one sparking electrode in the second layer; And comprise the part that corresponding plane covers body, insulator and the lead that is connected with control unit, mechanical structure etc. or control unit; Said sparking electrode pointwise ground at least one zone on key switch surface produces potential difference, and exports controlled electric current; Ground floor is connected with control unit with the second layer, and control unit produces secondary signal based on first signal and controls sparking electrode.
As a kind of alternative, can on identical layer, alternately arrange sparking electrode and transducer, to save the space.
Simultaneously, in the sparking electrode output voltage, the relationship analysis operator of the voltage/current that control unit can be through output is to the operation of key switch, to a certain extent the function of aiding sensors, further simplified structure.
As stated, key switch according to the present invention is realized the current analog tactile feedback through sparking electrode and operator's the controlled electric current of contact portion output, and the type of sensor that therefore comprises in the Sensor section to key switch does not have specific (special) requirements.For example, can adopt based on principles such as " electric field change ", " changes of magnetic field ", " variations in temperature ", " humidity variation ", " humidity variation ", " capacitance variations ", " resistance variations ", sound wave principle, optical principle, mechanical movements and realize transducer of the present invention.
In an embodiment of the present invention, control unit VP produces secondary signal and controls sparking electrode and realize tactile feedback information based on first signal of transducer output.
In at least one embodiment of the present invention, under the initial condition of also key switch not being operated, control unit VP controls sparking electrode to realize the tactile feedback information under the initial condition through producing secondary signal.
In addition, the transducer that uses in the key switch of the present invention can be touch sensor or noncontacting proximity sensor.For example, among at least one embodiment of the present invention, can adopt the operation of the noncontacting proximity sensor of sound wave/light wave transducer and so on the person that comes the detecting operation to key switch.For example, can use the optical sensing devices that the CCD camera constitutes and/or adopt sensing device to detect operation to key switch based on surface acoustic wave technique.Like this, Sensor section S1 not necessarily must be placed under the discharge electrode part S2.On the contrary, Sensor section can be installed in the top of key switch, like the diagram of accompanying drawing 2.At this moment, thereby detect the mode of operation of key switch, can send the coordinate and the relevant mode of operation that detect to control unit VP as first signal through the variation that detects key switch surface acoustic wave/optical signalling.Thus, can simplify the internal structure of key switch, reduce the mechanical movement of discharge electrode part simultaneously, help to prolong its useful life so that can adopt hard material to make sparking electrode.
It is thus clear that in key switch according to the present invention, the relative position of transducer and sparking electrode is flexile, this depends on type of sensor and the operation principle that is adopted.
In addition; According to embodiments of the invention; Mechanical structure that can transducer is auxiliary is come the common function that realizes the touch-control sensing as the part of transducer, and mechanical structure that can also sparking electrode is auxiliary is come the common function that realizes sparking electrode as the part of sparking electrode.
In an embodiment of the present invention, control unit VP also is connected with the electronic equipment that said key switch is installed, and perhaps constitutes unit module with it.
According to one embodiment of present invention, the voltage/current of control unit VP control sparking electrode output, and analyze electric capacity, resistance and the potential change between the different sparking electrodes.
According to another embodiment of the present invention, control unit VP can control the part of the shell of key switch as sparking electrode.
According to one embodiment of the invention, wherein sparking electrode can move perpendicular to the surface of key switch.
In addition; Can key switch of the present invention be embodied as any form known in the art; Navigation key that constitutes such as the keyboard that adopts capacitance type sensor, the mousebutton that adopts reed and the multisensor in the mobile phone interface or the like, include but not limited to this area at present known with various ways of realization such as various buttons exploitation in the future, switch, navigation key, trigger.Therefore, the mode of in present specification and claims, enumerating only is exemplary and not restrictive.
Now, come the touch-sensitive display of illustration referring to Fig. 3 according to the embodiment of the invention.As shown in Figure 3, touch-sensitive display comprises: Sensor section S1 has at least one transducer; Discharge electrode part S2 has at least one sparking electrode E
1, E
2... E
MDisplay medium S3; And control unit VP, control unit VP is connected with each sparking electrode and display medium S3 among Sensor section S1, the discharge electrode part S2.As an example, Sensor section S1 is formed transparent flexible transducer pad (is example with resistance or condenser type).
The touch that sensor operator is surperficial to touch-sensitive display, and produce one first signal at least, this first signal is confirmed the position (cartesian coordinate) of touch at least.
Can make up display medium according to various display technologies commonly used, adopt the LCD technique construction in this embodiment.As distortion, can utilize " organic electroluminescent film ", " micro-capsule electrophoretic display ", " CRT ", " LED ", perhaps " plasma demonstration " realize the display medium among the present invention.
Whether touch display according to the present invention is exported the effect that controlled electric current is realized the current analog tactile feedback through sparking electrode and operator's contact portion, be that flexibility or inflexibility do not have particular requirement to display medium therefore.
On Sensor section, lay discharge electrode part, discharge electrode part comprises conductive sparking electrode E
1... E
M, and corresponding plane cover body, comprise the part of megohmite insulant and lead that links to each other with controller or controller in addition.
Sparking electrode E
1... E
MCan produce potential difference in the uppermost surface of touch-sensitive display, the controlled electric current of output between while and operator's the contact portion.The difference of change in current and formation " current pattern " will be simulated the sense of touch of generation to object, can simulate other physical characteristic of object simultaneously.
According to one embodiment of present invention; Constitute pixel to sparking electrode corresponding to densely arranged display; Enable through producing the electric current that accurately to control between potential difference between different sparking electrodes and operator's the contact portion; Thereby be fit to the output of the true sense of touch of simulation, for example export braille, the temperature of institute's display object, texture, hardness, other physical characteristic, or the like.Can be because these characteristics through the inner conduction current of human nerve by the perception of human body institute, thus operator's tactile feedback enriched, and receive the influence of external environment unlike conventional display device.
According to one embodiment of present invention, touch-sensitive display can be a kind of touch-sensitive display that is divided into three-decker.Wherein be provided with at least one transducer in the ground floor, to detect the operation on touch-sensitive display surface and to produce first signal, first signal is confirmed the mode of operation to the touch-sensitive display surface at least.Above ground floor, lay the second layer; Be provided with at least one sparking electrode in the second layer; And comprise the part that corresponding plane covers body, insulator and the lead that is connected with control unit, mechanical structure etc. or control unit; Said sparking electrode pointwise ground at least one zone on the surface of touch-sensitive display produces potential difference, and exports controlled electric current; Below ground floor, lay the 3rd layer, the 3rd layer is made up of display medium, and ground floor, the second layer and the 3rd layer are connected with control unit, and control unit produces secondary signal based on first signal and controls sparking electrode.
As a kind of alternative, can on identical layer, alternately arrange sparking electrode and transducer, to save the space.
Now, come illustration touch-sensitive display according to another embodiment of the present invention referring to Fig. 4.Be with the main distinction of Fig. 3, adopt the noncontacting proximity sensor of sound wave/optical pickocff and so on to come the alternative sensor pad.For example, the transducer that the optics allodynia device that uses the CCD camera to constitute perhaps adopts surface acoustic wave technique to constitute detects the operation to the touch-sensitive display surface.Wherein, transducer is installed in the top of discharge electrode part, thereby confirms the contact condition of operator and touch-sensitive display through the variation that detects the surperficial sound wave/optical signalling of touch-sensitive display.Can be transmitted to control unit VP to coordinate of measuring and relevant contact condition upward as first signal.
According to one embodiment of present invention; Sensor section S1 in the touch-sensitive display may be implemented as layer structure; Promptly; As the sensor layer that wherein is provided with at least one transducer, and discharge electrode part S2 also may be implemented as layer structure, promptly as the sparking electrode layer that wherein is provided with at least one sparking electrode.Similarly, display medium may be implemented as the display dielectric layer of flexibility/inflexibility.
Thereby control unit VP produces secondary signal control sparking electrode based on first signal and produces potential difference at least one the regional pointwise ground on the surface of touch-sensitive display; The controlled electric current of output between while and operator's the contact portion, thus current analog tactile feedback formed to the object that shows on the display medium.
Touch-sensitive display according to an embodiment of the invention, wherein, sparking electrode is processed by transparent electric conducting material.
Touch-sensitive display according to another embodiment of the present invention, wherein, sparking electrode is processed by the electric conducting material of porous.
According to the touch-sensitive display of one embodiment of the invention, wherein control unit is controlled the part of the shell of touch-sensitive display as sparking electrode.
According to the touch-sensitive display of one embodiment of the invention, wherein sparking electrode can move perpendicular to the surface of touch-sensitive display.
Though describe the present invention, be appreciated that the present invention is not limited to disclosed embodiment in conjunction with the foregoing description.And within the principle and scope of the present invention, can make amendment to the present invention does not depart from the scope of the present invention to introduce the unaccounted any change of this specification, replacement or equivalent elements.
Claims (18)
1. key switch with current analog tactile feedback comprises:
At least one transducer, the operation that the detecting operation person is surperficial to key switch, and produce first signal;
At least one sparking electrode, pointwise ground produces potential difference at least one zone on said key switch surface, and exports controlled electric current;
Control unit is connected with said at least one transducer, said at least one sparking electrode, produces secondary signal based on first signal and controls sparking electrode.
2. key switch according to claim 1, wherein sparking electrode and operator's contact portion between the controlled electric current of output to form the current analog tactile feedback.
3. key switch according to claim 1, wherein, the voltage and current of said control unit control sparking electrode output, and analyze electric capacity, resistance and the potential change between the different sparking electrodes.
4. according to each described key switch of claim 1-3, wherein alternately arranging sparking electrode and transducer with one deck.
5. according to each described key switch of claim 1-3, wherein arrange sparking electrode and transducer at different layers.
6. key switch according to claim 1, wherein
Said transducer is touch sensor or noncontacting proximity sensor.
7. key switch according to claim 6, wherein
Said transducer makes up the person that comes the detecting operation operation to the key switch surface based on a kind of in electric field change, changes of magnetic field, variations in temperature, humidity variation, pressure variation, capacitance variations, resistance variations, sound wave principle or the optical principle or its.
8. key switch according to claim 1, wherein control unit is controlled the part of the shell of key switch as sparking electrode.
9. touch-sensitive display with current analog tactile feedback comprises:
At least one transducer detects the operation to the touch-sensitive display surface to the operator, and produces first signal;
At least one sparking electrode, pointwise ground produces potential difference at least one zone on touch-sensitive display surface, and exports controlled electric current;
Display medium;
Control unit is connected with said at least one transducer, said at least one sparking electrode and said display medium, produces secondary signal with the control sparking electrode based on first signal.
10. touch-sensitive display according to claim 9, wherein,
Sparking electrode and operator's contact portion between the controlled electric current of output with the current analog tactile feedback of the object that shows on forming display medium.
11. touch-sensitive display according to claim 9, wherein, the voltage and current of said control unit control sparking electrode output, and analyze electric capacity, resistance and the potential change between the different sparking electrodes.
12., wherein alternately arranging sparking electrode and transducer with one deck according to each described touch-sensitive display among the claim 9-11.
13., wherein arrange sparking electrode and transducer at different layers according to each described touch-sensitive display among the claim 9-11.
14. according to each described touch-sensitive display among the claim 9-11, wherein, sparking electrode is processed by transparent electric conducting material.
15. according to each described touch-sensitive display among the claim 9-11, wherein, sparking electrode is processed by the electric conducting material of porous.
16. touch-sensitive display according to claim 9, wherein
Said transducer is touch sensor or noncontacting proximity sensor.
17. touch-sensitive display according to claim 16, wherein
Said transducer makes up based on a kind of in electric field change, changes of magnetic field, variations in temperature, humidity variation, pressure variation, capacitance variations, resistance variations, sound wave principle or the optical principle or its and detects said at least one regional touch control operation.
18. touch-sensitive display according to claim 9, wherein control unit is controlled the part of the shell of touch-sensitive display as sparking electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110231927.2A CN102427354B (en) | 2010-08-12 | 2011-08-12 | Key switch with current simulation touch feedback and touch sensitive display |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010251785.1 | 2010-08-12 | ||
| CN201010251785 | 2010-08-12 | ||
| CN201110196604.4 | 2011-07-14 | ||
| CN201110196604 | 2011-07-14 | ||
| CN201110231927.2A CN102427354B (en) | 2010-08-12 | 2011-08-12 | Key switch with current simulation touch feedback and touch sensitive display |
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| Publication Number | Publication Date |
|---|---|
| CN102427354A true CN102427354A (en) | 2012-04-25 |
| CN102427354B CN102427354B (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110231927.2A Active CN102427354B (en) | 2010-08-12 | 2011-08-12 | Key switch with current simulation touch feedback and touch sensitive display |
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| Country | Link |
|---|---|
| CN (1) | CN102427354B (en) |
| WO (1) | WO2012019565A1 (en) |
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| CN102968214A (en) * | 2012-11-27 | 2013-03-13 | 上海华勤通讯技术有限公司 | Touch control terminal and use method thereof |
| WO2014154034A1 (en) * | 2013-03-28 | 2014-10-02 | Wang Qike | Touch display screen with touch output function, and touch output apparatus |
| CN104284029A (en) * | 2014-11-06 | 2015-01-14 | 上海斐讯数据通信技术有限公司 | Mobile device capable of detecting air humidity and air humidity detection method |
| CN105094347A (en) * | 2014-05-06 | 2015-11-25 | 联想(北京)有限公司 | Keyboard and driving method thereof, and electronic equipment having same |
| CN105446515A (en) * | 2014-08-22 | 2016-03-30 | 联想(北京)有限公司 | Touch device and apparatus comprising same |
| CN103034331B (en) * | 2012-12-12 | 2016-06-29 | 中兴通讯股份有限公司 | A kind of haptic feedback devices and terminal |
| CN106020639A (en) * | 2016-05-11 | 2016-10-12 | 北京小焙科技有限公司 | Key non-contact control method and system |
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| CN105094347B (en) * | 2014-05-06 | 2020-01-31 | 联想(北京)有限公司 | Keyboard, driving method thereof and electronic equipment comprising keyboard |
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| CN104284029A (en) * | 2014-11-06 | 2015-01-14 | 上海斐讯数据通信技术有限公司 | Mobile device capable of detecting air humidity and air humidity detection method |
| CN106020639A (en) * | 2016-05-11 | 2016-10-12 | 北京小焙科技有限公司 | Key non-contact control method and system |
| CN106020639B (en) * | 2016-05-11 | 2020-04-28 | 北京小焙科技有限公司 | Non-contact control method and system for keys |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102427354B (en) | 2014-12-10 |
| WO2012019565A1 (en) | 2012-02-16 |
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