CN102778958A - Touch-sensitive keyboard and control method thereof - Google Patents
Touch-sensitive keyboard and control method thereof Download PDFInfo
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- CN102778958A CN102778958A CN2012102536160A CN201210253616A CN102778958A CN 102778958 A CN102778958 A CN 102778958A CN 2012102536160 A CN2012102536160 A CN 2012102536160A CN 201210253616 A CN201210253616 A CN 201210253616A CN 102778958 A CN102778958 A CN 102778958A
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Abstract
The invention discloses a touch-sensitive keyboard which comprises a base, a matrix switch membrane and a plurality of key devices. The matrix switch membrane is arranged on the base according to the layout setting of the keyboard and consists of a plurality of switch elements, the key devices are positioned above the matrix switch membrane and are used for controlling on and off of the switch elements correspondingly after being stressed to ascend and descend, each key device comprises a press portion for being pressed by a user, and a capacitive sensing film layer is arranged between the press portion of each key device and the matrix switch membrane and used for sensing an external human body medium within the layout range of the keyboard. The keyboard is provided with a control unit used for identifying an on-off state of an optional switch element and detecting the position of the external human body medium in the layout of the keyboard by detecting change of current signals of the capacitive sensing film layer. The invention further provides a control method of the touch-sensitive keyboard. The touch-sensitive keyboard is small in occupied area, and a keyboard input function and a touch-sensitive input function are simultaneously realized on the same layout of the keyboard.
Description
[technical field]
The present invention relates to a kind of keyboard, relate in particular to a kind of touch induction keyboard and control method thereof.
[background technology]
The capacitance touch induction technology is a kind of variation to the touch sensor capacitance through human body, thereby confirms to be close to a kind of technology of human body (like the finger) position of sensor, is widely used in portable equipment.For bench device, then simply be assembled in a side of keyboard widely, accomplish literal input and host computer control function.
On the one hand, owing to be limited by the size of finger, for reaching input flexibly and fast, the area of the button on the keyboard can not infinitely dwindle.On the other hand, for reaching good operating experience, the touch pad that is integrated in keyboard one side needs bigger area.Meet the keyboard that above 2 user's requests design and produce the band touch pad that forms, certainly will possess very big area.For the miniaturization of input equipment brings obstacle.
Simultaneously, touch pad must be realized point selection function.Traditional way is, the software algorithm control of logical family is judged the touching in short-term of finger, and produces the corresponding signalisation main frame that clicks.
Industry do not have always way satisfy simultaneously user's touch-control area big, occupy little space and click the demand clearly of moving.
Button on the known keyboard; Be supported on the keyboard substrate by the key lifting structure; Be built-in with the contact switch that receives the effect of said key lifting structure, send to main frame by the conducting of this contact switch and click signal, selecting for use of key lifting structure is very diversified; Comprise traditional scissor, guide colume type and double-open type etc., be more common in various countries' patent documentation.Known touch pad adopts axial coordinate matrix form capacitive transducer to realize, realizes position sensing by the formed capacitance variation of capacitive transducer that detects X trend and Y trend.Also be more common in prior art.In the prior art, several onrelevants of keyboard and touch pad.
[summary of the invention]
The objective of the invention is to improve above-mentioned deficiency, a kind of touch induction keyboard is provided, satisfy keyboard input and touch the demand of input, and guarantee that this keyboard grabbing space minimizes with the touch-control area and maximize.
Another object of the present invention is to provide one be applicable to aforementioned touch induction keyboard control method.
For realizing the object of the invention, the present invention adopts following technical scheme:
Touch induction keyboard of the present invention; Comprise base, be arranged on the base the matrix switch film that constitutes by some switch elements according to the keyboard layout setting; And be used for the plurality of keys device of stressed ascending, descending above being positioned at the matrix switch film with the switching of each switch element of correspondence control; Said key device comprises and offers the press section that the user implements pressing operation, wherein:
Between the press section of said key device and the said matrix switch film, be provided with the capacitive sensing rete that is used at the outside people's body medium of said keyboard layout scope internal induction;
This keyboard is provided with control module, is used to discern the on off operating mode of any switch element; The variation that is used for the current signal through detecting said capacitive sensing rete detects said outside people's body medium keyboard layout of living in position.
Realize touch sensible by the mutual capacitance mode; Said capacitive sensing rete has double-layer structure; Every layer of structure includes a plurality of conductors that parallel setting; Double-layer structure is arranged with the axis quadrature of the longitudinally of conductor each other horizontal ordinate and the ordinate to form keyboard layout respectively is set, and is formed for responding to the capacitance inductor of outside people's body medium between the corresponding conductor in the position of different layers, and outside people's body medium is during near this capacitance inductor; The electric current that causes the conductor at this capacitance inductor place changes, and said control module changes through the conductor current that detects different layers knows the position in outside people's body medium keyboard layout of living in.
In the embodiment of the present invention, said each conductor is the wire metalwork that one is extended, and under the press section corresponding to each key device, each layer in this double-layer structure all has two strip metal spares under being somebody's turn to do, to locate.
In another embodiment, said each conductor is formed along diagonal serial connection by some rhombus conducting strips, and with paralleling setting with said diagonal line between a plurality of conductors in one deck structure, double-layer structure is with the setting of arranging of the said diagonal line quadrature of conductor each other.Under the press section corresponding to each key device, each layer in this double-layer structure all has two conducting strips to locate under being positioned at this at least in part.
Realize touch sensible by the self-capacitance mode; Said capacitive sensing rete has double-layer structure; Every layer of structure includes a plurality of conductors that parallel setting; Double-layer structure is arranged with the axis quadrature of the longitudinally of conductor each other horizontal ordinate and the ordinate to form keyboard layout respectively is set, and is formed for responding to the capacitance inductor of outside people's body medium between the adjacent conductor with one deck, and outside people's body medium is during near this capacitance inductor; The electric current that causes the conductor at this capacitance inductor place changes, and said control module changes through the conductor current that detects different layers knows the position in outside people's body medium keyboard layout of living in.
Concrete, said each conductor is formed along the diagonal serial connection by some rhombus conducting strips, and with paralleling setting with said diagonal line between a plurality of conductors in one deck structure, double-layer structure is with the setting of arranging of the said diagonal line quadrature of conductor each other.Under the press section corresponding to each key device, each layer in this double-layer structure all has two conducting strips to locate under being positioned at this at least in part.
Further; Said control module is connected with a mode switch element, and this mode switch element limits the uniqueness characteristic information that said control module is used for discerning the position of said outside people's body medium keyboard layout of living in and/or is used to discern the switch element of user through pushing one of any institute's conducting of said key device.
Said key device comprises elastic component, lifting structure and the said press section of contact-carrying; Said elastic component is positioned on the said matrix switch film corresponding to a switch element; Said lifting structure is used to guide the up-down of said press section with respect to said base; Said press section offers the user and carries out pressing operation, when the user pushes, and conflict said elastic component and drive elastic component and sink of press section with the said switch element of conducting; When the user pushes when cancelling, elastic component resets and breaks off said switch element.
Between the press section of said matrix switch film and said key device, from the bottom to top according to level setting such as lower component: play the loam cake of fixed bearing effect, said capacitive sensing rete, diaphragm.
Touch sensitive key disk control method of the present invention, it comprises the steps:
(1) provide superjacent air space to supply outside people's body medium to carry out move operation according to each key device of keyboard layout setting;
(2) utilize the capacitive sensing rete that is preset in the keyboard layout scope to detect said outside people's body medium residing position in keyboard layout;
(3) discern said positional information by a control module, generate corresponding signal output.
In one embodiment of the invention, this method also comprises the steps:
(4) whether control module discerns the pressing operation that said outside people's body medium is implemented certain key device through the conducting that detection is preset in each switch element on the matrix switch film in the keyboard layout scope;
(5) discern the conducting state of said switch element by said control module and when one of switch element is switched on, produce the touch-control instruction output that the outside people's body medium of sign carries out touch control operation.
In another embodiment of the present invention, this method also comprises the steps:
Lasting duration after control module changes through the electric current that detects each conductor in the double-layer structure; When this duration reaches pre-set threshold value; Or control module produces and characterizes the touch-control instruction output that outside people's body medium carries out touch control operation when changing through the generation secondary that detects each conductor in the double-layer structure.
Compared with prior art, the present invention has following advantage:
At first; The present invention with capacitive sensing rete organic combination in traditional keyboard layout; With the touch sensible area scope of keyboard layout, and can the hover operation of keyboard operation or finger be converted in case of necessity with touch location is corresponding and click instruction, make keyboard can not only realize the button input as maximum; Can also realize the input of large tracts of land touch sensible, needn't for keyboard touch pad be set separately again.
Secondly; Adapt to the singularity that button is arranged in the keyboard layout, in the capacitive sensing rete, its double-layer structure being adopted with the diagonal is that axle carries out the form realization capacitance inductor that quadrature is coupled, rational in infrastructure; Be easy to correspondingly with each keyboard better, and can simplify the complex connection degree.
Moreover the present invention can control touch induction keyboard according to actual needs and be in homoatomic chain dish input state, pure touch sensible input state, and both uses state with through further configuration mode switch unit.
[description of drawings]
Fig. 1 is the package assembly synoptic diagram of touch induction keyboard of the present invention;
Fig. 2 is the vertical middle cut-open view after touch induction keyboard of the present invention is removed by the part;
Conductor layout synoptic diagram in the capacitive sensing rete that Fig. 3 is adopted for touch induction keyboard first embodiment of the present invention, wherein capacitance inductor constitutes with the mode of mutual capacitance;
Conductor layout synoptic diagram in the capacitive sensing rete that Fig. 4 is adopted for touch induction keyboard second embodiment of the present invention, wherein capacitance inductor constitutes with the mode of mutual capacitance.
[embodiment]
Below in conjunction with accompanying drawing and embodiment the present invention is further described:
Touch induction keyboard of the present invention is used to accept user operation, and user's operation is converted into after the input signal, is transferred to the terminal device such as personal computer, notebook computer, the ultra utmost point.
See also Fig. 1 and Fig. 2; Touch induction keyboard of the present invention; Physically form by sandwich construction; Comprise base 1, matrix switch film 2, loam cake 3, capacitive sensing rete 4, diaphragm 5 and successively from bottom to top, according to a plurality of key devices (not label) of preset keyboard layout arranged, in addition; Touch induction keyboard also should possess the essential control circuit part of known keyboard, for example control module 8 (consulting Fig. 5) but wireless signal transmission circuit of arrangement, acousto-optic warning circuit etc.
Described base 1 forms a receiving space 10 and is used to assemble aforementioned remaining part, and this receiving space 10 has occupied almost whole base 1, and only to realize the touch sensing function opinion, this receiving space 10 can add the touch pad of any standalone configuration again.
Described matrix switch film 2, its structure and technology realize being more common in prior art, pardon not all right giving unnecessary details.This matrix switch film 2 is in like manner according to preset keyboard layout; Mode with arranged is provided with a plurality of switch elements (not label diagram), and the conducting of each switch element all causes producing a uniqueness characteristic information, for example; When one of them switch element is switched on; The conducting of this switch element can be discerned by the control module 8 of keyboard, will produce the signal that finally is used to characterize character " a ", and converts input signal output into by this control module 8.And wherein, conducting Be Controlled unit 8 identifications of this switch element, control module 8 is rely and is discerned it for characterizing signal characteristic of character " a ", is said uniqueness characteristic information.According to this uniqueness characteristic information, can confirm that not only user's input is expressed, can also keyboard layout be regarded as coordinate system, residing position when confirming user's finger presses.
Described key device; Be provided with according to keyboard layout design number; Its number also corresponding basically naturally (generally corresponding one by one, but also can be corresponding two switch elements of key device) like space bar with the switch element number of said matrix switch film 2.Evolution in decades after keyboard is born; Its structure is also varied; Typically just like scissor support, double-open type support and flexible pillar type structure etc.; Be more common in patent documentation, can be used to guide the structure that key device goes up and down with these and be summarised as lifting structure, with convenient follow-up explanation.Concrete; Said key device comprises the press section 77 that offers the user and implement pressing operation, the elastic component 71 of the contact-carrying 710 of the switch element of the said matrix switch film 2 that is used for conflicting and as previously mentioned; Be used to guide the liter of said press section 77 or fall, finally cause elastic component 71 pairing switch elements to be pushed the lifting structure of conducting or shutoff by contact 710 to act on said elastic component 71.In the present embodiment, adopt the flexible pillar type structure to be used to realize the lifting structure of key device.In brief, each key device is positioned at matrix switch film 2 tops, is used for the switching of stressed ascending, descending with corresponding gating matrix switch film 2 each respective switch element.Structure by key device can know that key device comprises elastic component 71, lifting structure and press section 77 from bottom to top successively; The elastic component 71 of all key devices is arranged on the matrix switch film 2; Strict position corresponding to each switch element positions, thereby, be appreciated that to elastic component 71 on physical arrangement, to have one deck of one's own; This only is to explain for the convenience of understanding, and should not be regarded as limitation of the present invention.
Above said matrix switch film 2, be elastic component 71, said loam cake 3 is then installed in elastic component 71 tops.Said loam cake 3 is used on edge each other, realizing being fastened and connected with said base 1; Certainly also can take to comprise other mounting means of screw lock; And, loam cake 3 bottoms the floor 31 of some bases 1 that are used to conflict is set so as to keep loam cake 3 and base 1 between firm installation.Obviously, the degree of depth (highly) of the receiving space 10 between loam cake 3 and the base 1 can be provided with flexibly, as long as set both fixed positions on short transverse.
Yet as far as present embodiment, said loam cake 3 not only is used as fixture, also matches with key device simultaneously, serves as the effect of a part of the lifting structure of this key device.Particularly, in order to ensure the installation of key device, need corresponding to the position of each said switch element through hole (be guided post 73 is full of and not label) be set at loam cake 3, and, guide posts 73 be set then in 77 bottom surfaces, press section of said key device.The press section 77 of key device is placed said loam cake 3 top location, and the guide posts 73 of 77 bottom surfaces, press section is passed through corresponding said through hole to pass loam cake 3, the said elastic component 71 of finally conflicting.Thus; By of the cooperate guiding of said guide posts 73 with through hole; The lifting action with respect to base 1 just can be realized in press section 77, receives user's institute's externally applied forces and forces when sinking elastic component 71 to descend to conflict and the corresponding switch element of conducting at it, when user's external force is removed; Elastic component 71 self returns to be released masterpiece and is used for said guide posts 73, and press section 77 is just recoiled to original position.Obviously, even realize guide posts 73 and through hole cooperate itself, also might not depend on and this through hole is set in loam cake 3 realizes, allow said guide posts 73 up-downs and realize and cylindrical hole can be set in the scope of this through hole independently again.
The top of described loam cake 3; The top of the through hole that the position of corresponding each described switch element is set; Be provided with the body of wall 33 of this through hole that is used for extending vertically, the setting of this body of wall 33, be convenient to follow-up on loam cake 3 location said capacitive sensing rete 4 and diaphragm 5 are set.
Described capacitive sensing rete 4; Be employed in a film two sides double-layer structure realization is set; And each body of wall 33 above corresponding said loam cake 3 on the capacitive sensing rete 4 is provided with the through hole 40 that allows body of wall 33 to pass through, so that capacitive sensing rete 4 covers are set to place, loam cake 3 tops.
Be used to realize that the capacitive sensing rete 4 of touch pad has self-capacitance and two kinds of implementations of mutual capacitance, the key that realizes touch controllable function is to know that outside people's body medium is in the residing position of touch interface and variation track and the touch control operation (instruction) implemented in a certain position.
Among the present invention, preferred mutual capacitance mode.See the circuit theory synoptic diagram of said capacitive sensing rete 4 shown in Figure 3 for details.Each layer in the double-layer structure of said capacitive sensing rete 4; Be equipped with the conductor 41 or 42 that becomes 45 or-45 degree tilt relationships with the keyboard longitudinally; These conductors 41,42 are connected in series on diagonal by rhombus conducting strip 44 and form; But each conducting strip 44 own diagonal line that constitute same conductor 41,42 also needn't be in line; Mainly be the characteristics that are not into the diagonal line coincidence between following adjacent keyboard and the keyboard press section 77 each other in order to adapt in the keyboard layout, can guarantee like this each keyboard press section 77 under corresponding in the same way one group of conducting strip 44.Each layer in the double-layer structure that forms thus, a plurality of conductors 41 or 42 that it comprised all are parallel relation, can be regarded as paralleling setting with the diagonal line of the conducting strip 44 in each conductor 41,42.And double-layer structure is separately positioned on the pros and cons of film; Because of differential seat angle each other is 90 degree, therefore, each conductor 41 of one in the double-layer structure (with reference to 41,42) and another each conductor 42 relation of arranging that just is orthogonal; Like this; Wherein the conductor in one deck structure can form horizontal ordinate, and the conductor in another layer structure then forms horizontal ordinate, and double-layer structure just makes up a coordinate system.The setting of double-layer structure; Just make key device press section 77 under be provided with four conducting strips 44; Respectively there are two conducting strips 44 to belong to double-layer structure respectively; Projection intersects under four conducting strips 44 equal some and the press section 77, then becomes not have to intersect non-overlapping nothing with other conducting strip 44 and interferes setting.The shape of conducting strip 44 can adopt sensu lato rhombus design, and so-called sensu lato rhombus refers to that it has comprised square.Several key devices surround pairing two groups of conducting strips 44 that belong to double-layer structure respectively under several adjacent press sections 77 on every side; Because they respectively have the connecting portion (not shown) that roughly is positioned at its geometric center; Thereby juxtaposition can appear in 44 common square geometric center places that constitute of two groups of conducting strips, but does not contact; Thereby the formation parallel capacitance, can form capacitance type sensor separately.And per two the adjacent conductive sheets 44 that belong to double-layer structure respectively also can form edge capacitance in each other edge, also can constitute capacitance inductor.Through being in the conductor layer ground connection of bottom side; Conductor layer place at end face adds high frequency voltage; By the said control module scanning electric current variation of two pairing conductors of coordinate in length and breadth; Promptly when outside people's body medium like finger near when some conducting strip 44 top, those conducting strips 44 and outside people's body medium and constitute shunt capacitance between the capacitance inductor accordingly, thus cause the electric current of corresponding conductor to change; Confirm in the double-layer structure to take place the conductor that electric current changes and just can confirm the position of the coordinate system that the residing capacitive sensing rete of outside people's body medium makes up, thereby confirm the position in outside people's body medium keyboard layout of living in.Detect principle more specifically and can consult some known touch sensible control technologys, do not give unnecessary details for this reason.It is thus clear that; Each key device in the keyboard layout; A described capacitance type sensor all can be set at least, and the electric current on capacitance variations through detecting all capacitance type sensors and the conductor that causes thus changes, but the just residing approximate location of the outside people's body medium of perception.Such design obviously meets the spirit of mutual capacitance touch sensitive technology, should be those skilled in the art and understand, yet also done adaptive architecture advances based on the singularity of keyboard layout, thereby its structure is more reasonable, can avoid the use of too much pin.
With the body of wall of the through hole of capacitive sensing rete 4 40 and said loam cake 3 33 sheathed after, completion is promptly accused in the installation of capacitive sensing rete 4.In like manner, can below capacitive sensing rete 4, establish a circuit substrate (not shown), and the mode with similar physics perforate is provided with a diaphragm 5 above capacitive sensing rete 4 with the mode pad of similar physics perforate.
The press section 77 of said each key device can be linked to be an independent stratum 6 according to keyboard layout with each press section 77 earlier with anchor clamps or alternate manner in production technology, so that accomplish unified assembling.
It is very easy assembling touch induction keyboard of the present invention, only needs according to aforesaid structural relation, and in layer assembling gets final product in succession.Related is principles well-known, pardons not all right giving unnecessary details.
As for other known circuit structure of keyboard, mainly be its control module 8, then can be collected in the place, any space of keyboard.Control module 8 needs to be connected with capacitive sensing rete 4 with matrix switch film 2 on electric; So that be switched on through certain switch element in the recognition matrix switch film 2 on the one hand; The uniqueness characteristic information that produces to be switched on this switch element serves as externally to export according to generating an input signal; This switch element is switched on also can be regarded as the touch control operation of user at this place, thereby produces the touch-control instruction by control module; On the other hand, discern the positional information that outside people's body medium is arranged in keyboard layout through detecting in the capacitive sensing rete 4 because of capacitance type sensor is changed by the parallelly connected conductor current that causes, and convert these positional informations into command information output.
The function of this two aspect of control module 8 also can be decomposed into its different working pattern, and still, control module 8 realizes that the method for these two kinds of different working modes is not limited to aforesaid announcement.As previously mentioned; Capacitive sensing rete 4 itself has made up a coordinate system; Thereby; With reference to nearest " floating touch " technology released of Sony; Can utilize this dual mode of the hover duration (conductors obtain the relatively constant electric current of lasting certain time length) of outside people's body medium above keyboard layout perhaps flexible suddenly (making the electric current of conductors that the secondary variation take place suddenly) to confirm the touch control operation of outside people's body medium in this position, the press section that not necessarily will push said key device just is regarded as producing touch control operation, thereby control module 8 generation touch-controls instructions are operated and made in the conducting that can substitute aforesaid switch element.And realize this process of judging in like manner realizing by said control module 8.It is thus clear that among the present invention, control module 8 realizes that the mode of different working modes is flexibly.
Through the inner realization of control module 8, perhaps, can further enrich the function of touch induction keyboard of the present invention through the mode switch element (not shown) that is connected with control module 8 is set.Particularly, by said mode switch element, can one machinery or capacitance-type switch be provided to the user; By the user mode of operation of said control module 8 is set, for example, when machinery or capacitance-type switch are in first state; Mode switch element just provides the parameter setting; Control module 8 is operated in view of the above only is used to receive the state that key device is imported, at this moment, the uniqueness characteristic information translation that 8 of control modules produce when being responsible for user's key tap is that character information (like ASCII character) input signal is outwards exported; Under this state, keyboard has traditional key-press operation input function; When machinery or capacitance-type switch were in second state, mode switch element just provided the parameter setting, makes control module 8 be operated in the input of the uniqueness characteristic information that produces when both receiving user's key tap in view of the above; Receive the positional information input of outside people's body medium (like user's finger) again; In other words, under this state, control module 8 is constantly exported the positional information of outside people's body medium as input signal; When user's key tap; Also information, the touch-control with the position in the keyboard layout that this button characterized instructs, even converts input signal output in the lump into together with the character information that this button characterized, and this state obviously belongs to the defeated state that mixes; Certainly; Also the third state can be set; Pairing positional information of uniqueness characteristic information that produces when making control module 8 receive only positional information and knock keyboard and touch-control instruction (or whether the outside people's body medium of control module 8 startup identifications hovers or the flexible suddenly touch-control instruction to produce); And converting it to input signal output, under this state, the keyboard role just is equal to traditional touch pad fully.
As previously mentioned, mode switch element both can independently become a functional module, also can be realized in the lump by control module 8.Except the duty that adopts machinery or capacitance switch to be aided with to realize control module 8 is switched, also can intelligence differentiate voluntarily.Particularly; The electric current that control module 8 can detect the conductor of each layer structure voluntarily changes; When it has detected a plurality of conductors (for example more than 3 or 3; But not limit by this) electric current generation marked change (as being lower than a certain predetermined threshold value) time, just can be regarded as aforesaid first duty automatically, and make control module 8 work in this duty; When control module 8 detects the electric current that has only two conductors in every layer of structure and changes, just can be considered the aforesaid second or the 3rd duty, and make control module 8 work in this duty.
It is thus clear that the setting of mode switch element has been enriched the function of touch induction keyboard, for the user provides hommization customization means.
The first embodiment of the present invention of more than setting forth; The physics and the electrical structure of touch induction keyboard of the present invention have fully been disclosed; With and principle of work and control method, sequitur touch induction keyboard of the present invention depends on the integrated design of touch sensible and keyboard input, can extensively substitute traditional keyboard Designing; It also provides touch sensing function with the shared set area of this keyboard layout when set area is provided in keyboard layout.
Second embodiment of touch induction keyboard of the present invention sees also Fig. 4; It adopts the wire metalwork to replace the conductor that is formed by conducting strip 44 serial connections among second embodiment; Guaranteeing has each two strip metal spares process of double-layer structure under each key device; The cross one another conductor of double-layer structure up and down just can form parallel capacitance to use as capacitance inductor; Just can realize with first embodiment equal effect thus, by the detection of electrorheologicalization on the control module 8 realization conductors, so that the positional information of the outside people's body medium of perception.
Among the 3rd not shown embodiment of touch induction keyboard of the present invention, said touch induction keyboard adopts the mode of self-capacitance to realize described capacitive sensing rete 4, and it is mainly that with the difference of first embodiment realization of electric aspect is different.Be mainly reflected in its double-layer structure the edge capacitance that the corresponding conducting strip 44 in the position that every layer of structure all utilized adjacent conductor forms, thereby structure capacitance inductor.For after capacitive sensing rete 4 applies the high frequency exchange current; Whether the electric current that in every layer of structure, detects adjacent two conductors changes; Certain position between can these two conductors of perception whether have outside people's body medium near; Because double-layer structure forms coordinate in length and breadth respectively; Whether certain point that the electric current that detects the conductor of double-layer structure changes in the coordinate system that just can confirm to be made up by capacitive sensing rete 4 exists the outside people's body medium that influences the conductor current variation, thereby confirms the position of the residing keyboard layout of outside people's body medium.Obviously, can substitute the mode of self-capacitance fully, realize the object of the invention with this mode of self-capacitance.
In sum; The present invention uses for reference touch sensible technology ripe in the prior art, applies it in the conventional keyboard, realizes touch induction keyboard thus; The touch induction keyboard area occupied is little, on same keyboard layout, realizes keyboard input and two kinds of functions of touch sensible input simultaneously.
In brief, above embodiment only in order to the explanation the present invention and and unrestricted technical scheme described in the invention; Therefore, although this instructions has carried out detailed explanation to the present invention with reference to each above-mentioned embodiment,, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the present invention; And all do not break away from the technical scheme and the improvement thereof of the spirit and scope of the present invention, and it all should be encompassed in the middle of the claim scope of the present invention.
Claims (15)
1. touch induction keyboard; Comprise base, be arranged on the base the matrix switch film that constitutes by some switch elements according to the keyboard layout setting; And be used for the plurality of keys device of stressed ascending, descending above being positioned at the matrix switch film with the switching of each switch element of correspondence control; Said key device comprises and offers the press section that the user implements pressing operation, it is characterized in that:
Between the press section of said key device and the said matrix switch film, be provided with the capacitive sensing rete that is used at the outside people's body medium of said keyboard layout scope internal induction;
This keyboard is provided with control module, is used to discern the on off operating mode of any switch element; The variation that is used for the current signal through detecting said capacitive sensing rete detects said outside people's body medium keyboard layout of living in position.
2. touch induction keyboard according to claim 1; It is characterized in that; Said capacitive sensing rete has double-layer structure; Every layer of structure includes a plurality of conductors that parallel setting; Double-layer structure is arranged with the axis quadrature of the longitudinally of conductor each other horizontal ordinate and the ordinate to form keyboard layout respectively is set, and is formed for responding to the capacitance inductor of outside people's body medium between the corresponding conductor in the position of different layers, and outside people's body medium is during near this capacitance inductor; The electric current that causes the conductor at this capacitance inductor place changes, and said control module changes through the conductor current that detects different layers knows the position in outside people's body medium keyboard layout of living in.
3. touch induction keyboard according to claim 2 is characterized in that, said each conductor is the wire metalwork that one is extended.
4. touch induction keyboard according to claim 3 is characterized in that, under the press section corresponding to each key device, each layer in this double-layer structure all has two strip metal spares under being somebody's turn to do, to locate.
5. touch induction keyboard according to claim 2; It is characterized in that; Said each conductor is formed along the diagonal serial connection by some rhombus conducting strips; With paralleling setting with said diagonal line between a plurality of conductors in one deck structure, double-layer structure is with the setting of arranging of the said diagonal line quadrature of conductor each other.
6. touch induction keyboard according to claim 5 is characterized in that, under the press section corresponding to each key device, each layer in this double-layer structure all has two conducting strips to locate under being positioned at this at least in part.
7. touch induction keyboard according to claim 1; It is characterized in that; Said capacitive sensing rete has double-layer structure; Every layer of structure includes a plurality of conductors that parallel setting; Double-layer structure is arranged with the axis quadrature of the longitudinally of conductor each other horizontal ordinate and the ordinate to form keyboard layout respectively is set, and is formed for responding to the capacitance inductor of outside people's body medium between the adjacent conductor with one deck, and outside people's body medium is during near this capacitance inductor; The electric current that causes the conductor at this capacitance inductor place changes, and said control module changes through the conductor current that detects different layers knows the position in outside people's body medium keyboard layout of living in.
8. touch induction keyboard according to claim 7; It is characterized in that; Said each conductor is formed along the diagonal serial connection by some rhombus conducting strips; With paralleling setting with said diagonal line between a plurality of conductors in one deck structure, double-layer structure is with the setting of arranging of the said diagonal line quadrature of conductor each other.
9. touch induction keyboard according to claim 8 is characterized in that, under the press section corresponding to each key device, each layer in this double-layer structure all has two conducting strips to locate under being positioned at this at least in part.
10. according to any described touch induction keyboard in the claim 1 to 9; It is characterized in that; Said control module is connected with a mode switch element, and this mode switch element limits the uniqueness characteristic information that said control module is used for discerning the position of said outside people's body medium keyboard layout of living in and/or is used to discern the switch element of user through pushing one of any institute's conducting of said key device.
11. according to any described touch induction keyboard in the claim 1 to 9; It is characterized in that said key device comprises elastic component, lifting structure and the said press section of contact-carrying, said elastic component is positioned on the said matrix switch film corresponding to a switch element; Said lifting structure is used to guide the up-down of said press section with respect to said base; Said press section offers the user and carries out pressing operation, when the user pushes, and conflict said elastic component and drive elastic component and sink of press section with the said switch element of conducting; When the user pushes when cancelling, elastic component resets and breaks off said switch element.
12. according to any described touch induction keyboard in the claim 1 to 9; It is characterized in that; Between the press section of said matrix switch film and said key device, from the bottom to top according to level setting such as lower component: play the loam cake of fixed bearing effect, said capacitive sensing rete, diaphragm.
13. a touch sensitive key disk control method is characterized in that it comprises the steps:
(1) provide superjacent air space to supply outside people's body medium to carry out move operation according to each key device of keyboard layout setting;
(2) utilize the capacitive sensing rete that is preset in the keyboard layout scope to detect said outside people's body medium residing position in keyboard layout;
(3) discern said positional information by a control module, generate corresponding signal output.
14. touch sensitive key disk control method according to claim 13 is characterized in that this method also comprises the steps:
(4) whether control module discerns the pressing operation that said outside people's body medium is implemented certain key device through the conducting that detection is preset in each switch element on the matrix switch film in the keyboard layout scope;
(5) discern the conducting state of said switch element by said control module and when one of switch element is switched on, produce the touch-control instruction output that the outside people's body medium of sign carries out touch control operation.
15. touch sensitive key disk control method according to claim 13 is characterized in that this method also comprises the steps:
Lasting duration after control module changes through the electric current that detects each conductor in the double-layer structure; When this duration reaches pre-set threshold value; Or control module produces and characterizes the touch-control instruction output that outside people's body medium carries out touch control operation when changing through the generation secondary that detects each conductor in the double-layer structure.
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