CN104423768A - Touch control system and control method thereof - Google Patents
Touch control system and control method thereof Download PDFInfo
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- CN104423768A CN104423768A CN201310409670.4A CN201310409670A CN104423768A CN 104423768 A CN104423768 A CN 104423768A CN 201310409670 A CN201310409670 A CN 201310409670A CN 104423768 A CN104423768 A CN 104423768A
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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
- G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
Abstract
The invention discloses a touch control system. The touch control system comprises an inductive touch panel, a first control module and a second control module, wherein the inductive touch panel comprises a plurality of induction channels, each induction channel comprises a plurality of conductor units which are mutually connected in series, and an induction contact is formed at the series connection of every two conductor units; the first control module is coupled to the induction channels and comprises a stabilized voltage control module and a ground terminal control module, one end of each induction channel is coupled to the stabilized voltage control module, and the other end of each induction channel is coupled to the ground terminal control module; the second control module is coupled to a plurality of induction contacts and is used for correspondingly receiving a plurality of induction signals from the induction contacts and calculating at least one touch control coordinate corresponding to the inductive touch panel according to the induction signals. The invention further discloses a control method of the touch control system. The signal processing efficiency of the touch control system is increased.
Description
Technical field
The present invention relates to technical field of touch control, particularly relate to a kind of touch-control system and control method thereof.
Background technology
In the market of various consumption electronic products now, the portable electronic products such as personal digital assistant (PDA), mobile phone (mobilePhone), mobile computer (notebook) and flat computer (tablet PC) use contact panel (touch panel) as the interface tool of its data communication all widely.In addition, due to current electronic product design all with light, thin for direction, therefore can wish omit as the conventional input devices such as keyboard, mouse in the design of product, especially, under the drive of flat computer demand stressing human oriented design, touch panel has suddenly become crucial spare part.
The touch-control display panel of current main flow, due to indium tin oxide (Indium Tin Oxide, ITO) there is better penetrability and electric conductivity, often select ITO as the material of its touch control electrode, touch-control display panel such as disclosed in U.S. Patent Publication No. US2011/0254803A1, can be reduced to the touch-control system 10 shown in Fig. 1 further.Touch-control system 10 after simplification includes the touch control electrode of double layer planar P1, P2, and the touch control electrode of each plane can be regarded as multiple equivalent resistance unit is mutually connected in series, such as plane P 1 includes equivalent resistance cells D 1, D2, and plane P 2 includes equivalent resistance cells D 3, D4.When user touches touch-control display panel, the touch control electrode of double layer planar P1, P2 because user's touch-control, and is that another equivalent resistance cells D 5 is to couple equivalent resistance cells D 1, D2, D3, D4.In the case, touch-control display panel utilizes a control module and multiple transmission line, and corresponding detecting couples rear equivalent resistance cells D 1, resistance change between D2, D3, D4, D5, to judge the touch-control coordinate of user, and such as, a touch point C shown in Fig. 1.
The signal processing mode of above-mentioned touch-control display panel is comparatively complicated, needs Time share scanning touch control electrode, and namely single ON time can only obtain single signal, and repeatedly after sequentially scanning, just can obtain position report point, such system processing signals efficiency is comparatively low.
Summary of the invention
In view of this, the invention provides a kind of touch-control system and control method thereof, to improve touch-control system signal transacting efficiency.
The present invention discloses a kind of touch-control system, includes: an inductive touch pad, and this inductive touch pad includes multiple induction channel, and each induction channel includes multiple conductor elements of serial connection mutually, and wherein contact is responded in every two conductor element serial connection place's formation one; One first control module, is coupled to those multiple induction channels, and comprises a voltage stabilizing control module and ground end control module, and one end of each induction channel is coupled to this voltage stabilizing control module, and the other end is coupled to this ground end control module; And one second control module, be coupled to the plurality of induction contact, receive multiple induced signals of the plurality of induction contact in order to correspondence, and calculate at least one touch-control coordinate corresponding to this inductive touch pad according to the plurality of induced signal.
Wherein in an embodiment, this voltage stabilizing control module comprises multiple stabilized switch unit; And this ground end control module includes multiple ground end switch unit; Wherein, one end of each induction channel is coupled to this stabilized switch unit, and the other end is coupled to this ground end switch unit.
Wherein in an embodiment, this first control module also includes a frequency controller, is coupled to this first control module, and makes respectively this induction channel sequentially be coupled to respectively this stabilized switch unit corresponding to this induction channel and each this ground end switch unit.
Wherein in an embodiment, this second control module includes:
Multiple inductive switch unit, wherein each inductive switch unit is coupled to one of them induction contact of each induction channel by multiple transmission line;
Multiple comparing unit, is coupled to the plurality of inductive switch unit, is used for receiving the induced signal that those respond to contacts, and is compared to produce a comparative result with a critical value by this induced signal; And
One processing unit, is coupled to this comparing unit, in order to receive this comparative result, and then calculates this touch-control coordinate corresponding to this inductive touch pad according to this comparative result.
Wherein in an embodiment, this comparing unit comprises:
One first input end, is coupled to this inductive switch unit, is used for receiving the induced signal of this induction contact;
One second input end, is used for receiving this critical value; And
One output terminal, is used for exporting this comparative result to this processing unit.
Wherein in an embodiment, those critical values are that without during touch-control, those respond to magnitude of voltage corresponding to contacts to this inductive touch pad.
Wherein in an embodiment, the resistance equal and opposite in direction of those conductor elements.
The present invention also discloses a kind of control method for this touch-control system, comprise step: a) this first control module produces a control signal, make one end and this voltage stabilizing control module conducting of those induction channels, control module conducting is held on the other end and this ground, and those sense node of those induction channels produce multiple induced signal; B) this second control module receives those induced signals, produces multiple comparative result according to those induced signals; C) this second control module calculates at least one touch-control coordinate corresponding to this inductive touch pad according to those comparative results.
Wherein in an embodiment, this step a) comprises those induction channels and is sequentially coupled between this voltage stabilizing control module and this ground holds and control.
Wherein in an embodiment, this step b) comprise and those induced signals are compared one by one with the critical value preset, and produce multiple comparative result.
Wherein in an embodiment, those critical values are that without during touch-control, those respond to magnitude of voltage corresponding to contacts to this inductive touch pad.
Wherein in an embodiment, those comparative results are the difference of those induced signals and those critical values.
Wherein in an embodiment, also comprise step: set up an induced signal look-up table according to those critical values, step b) comprise and those induced signals are compared with this induced signal look-up table, and produce those comparative results.
Wherein in an embodiment, the resistance equal and opposite in direction of those conductor elements.
In the present invention, inductive touch pad comprises multiple induction channel, each induction channel includes multiple conductor elements of serial connection mutually, wherein every two conductor element serial connection place's formation one are responded to contact and are received by the second control module to produce multiple induced signal, improve the signal transacting efficiency of touch-control system by this.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of known technology one touch-control system.
Fig. 2 is the schematic diagram of the embodiment of the present invention one touch-control system.
Fig. 3 A is the schematic diagram of the embodiment of the present invention one without the linearity curve of touch-control.
Fig. 3 B is the schematic diagram of the embodiment of the present invention one linearity curve of touch-control.
Fig. 4 is the schematic diagram of the embodiment of the present invention one without the induced signal look-up table of touch-control.
Fig. 5 is the schematic diagram of the embodiment of the present invention one induced signal look-up table of touch-control.
Fig. 6 is the process flow diagram of the embodiment of the present invention one control method.
Reference numeral
10,20 touch-control systems
200 inductive touch pads
2020 voltage stabilizing control modules
2022 ground end control modules
204 second control modules
2040 processing units
30 transmission lines
60 control methods
600,602,604,606,608 steps
C touch point
D1, D2, D3, D4, D5 equivalent resistance unit
C_1 ~ C_N comparing unit
GND ground terminal voltage
CH_1 ~ CH_M responds to channel
L1, L2, L3 linearity curve
P1, P2 plane
P1_1 ~ P1_N ... PX_1 ~ PX_N ..., induction contact
PM_1～PM_N
E conductor element
SW_V1 ~ SW_VM stabilized switch unit
SW_G1 ~ SW_GM ground end switch unit
SW_S1 ~ SW_SN inductive switch unit
TB1, TB2 induced signal look-up table
VDD burning voltage
Embodiment
Some vocabulary is employed to censure specific assembly in the middle of instructions and claims.Those skilled in the art should understand, and same assembly may be called with different nouns by manufacturer.This specification and claims book is not used as with the difference of title the mode distinguishing assembly, but is used as the benchmark of difference with assembly difference functionally." comprising " mentioned in the middle of instructions and claims is in the whole text an open term, therefore should be construed to " comprise but be not limited to ".In addition, " electric connection " one word be comprise directly any and be indirectly electrically connected means at this.Therefore, if describe a first device in literary composition to be electrically connected at or to couple one second device, then represent this first device and can be directly connected in this second device, or be indirectly connected to this second device by other device or connection means.
Please refer to Fig. 2, Fig. 2 is the schematic diagram of the embodiment of the present invention one touch-control system 20.As shown in Figure 2, touch-control system 20 includes inductive touch pad 200,1 first control module (figure does not mark) and one second control module 204.Inductive touch pad 200 is respectively coupled to the first control module and the second control module 204.Inductive touch pad 200 is by the control of the first control module, multiple induced signal is produced in single ON time, receive the plurality of induced signal again by the second control module 204 simultaneously, to judge whether user presses touch-control system 20 according to the plurality of induced signal, and then determine one or more touch-control coordinate corresponding to inductive touch pad 200.
Specifically, inductive touch pad 200 comprises multiple induction channel CH_1 ~ CH_M, and each induction channel includes multiple conductor element E of serial connection mutually.Multiple induction channel CH_1 ~ CH_M is arranged mutually parallel in the same direction, such as multiple induction channel CH_1 ~ CH_M is arranged mutually parallel along X-coordinate direction, on each induction channel, multiple conductor element E is connected in series mutually along Y-coordinate direction, and multiple conductor element E of each induction channel are identical.In the present embodiment, each conductor element E is all voltage dependent resistor (VDR), and its material can be selected from indium tin oxide, zinc paste, bismuth oxide, antimony oxide or manganese oxide etc.Contact is responded in the serial connection place formation one of every two conductor element E, and then forms multiple induction contact on each induction channel.For example, induction channel CH_1 includes (N+1) individual conductor element E of serial connection mutually, (N+1) the serial connection place that is mutually connected in series of individual conductor element E formed induction contact P1_1 ~ P1_N, induction channel CH_2 include induction contact P2_1 ~ P2_N ..., induction channel CH_M includes induction contact PM_1 ~ PM_N etc., make the multiple conductor element E on inductive touch pad 200 form the matrix of a M × (N+1).
First control module includes voltage stabilizing control module 2020 and ground end control module 2022.Wherein, voltage stabilizing control module 2020 includes M stabilized switch cell S W_V1 ~ SW_VM, and each stabilized switch unit includes two ends, and one end is coupled to a burning voltage VDD, and the other end is coupled to the one in multiple induction channel CH_1 ~ CH_M.Ground end control module 2022 includes M ground end switch cell S W_G1 ~ SW_GM, and each ground end switch unit includes two ends, and one end is coupled to a ground terminal voltage GND, and the other end is coupled to the one in multiple induction channel CH_1 ~ CH_M.
In addition, the first control module can also include a frequency controller (not shown), makes each induction channel CH_1 ~ CH_M sequentially be coupled to each stabilized switch cell S W_V1 ~ SW_VM and each ground end switch cell S W_G1 ~ SW_GM of its correspondence.For example, in the first ON time, frequency controller produces a control signal, only makes stabilized switch cell S W_V1 and corresponding ground end switch cell S W_G1 conducting, and namely only corresponding conducting responds to channel CH_1 between burning voltage VDD and ground terminal voltage GND; In the second ON time, frequency controller produces a control signal, only makes stabilized switch cell S W_V2 and corresponding ground end switch cell S W_G2 conducting, and namely only corresponding conducting responds to channel CH_2 between burning voltage VDD and ground terminal voltage GND; According to this mode, under the control of frequency controller, turn in order induction channel CH_1 ~ CH_M is between burning voltage VDD and ground terminal voltage GND.
Second control module 204 includes multiple inductive switch cell S W_S1 ~ SW_SN, multiple comparing unit C_1 ~ C_N and processing unit 2040.Each inductive switch unit is respectively coupled to one of them induction contact of each induction channel by multiple transmission line 30.In the present embodiment, for example, inductive switch cell S W_S1 couples the sense node P1_1 on induction channel CH_1 respectively by multiple transmission line 30, the sense node P2_1 on induction channel CH_2 ..., the sense node PM_1 on induction channel CH_M.Inductive switch cell S W_S2 couples the sense node P1_2 on induction channel CH_1 respectively by multiple transmission line 30, sense node P2_2 on induction channel CH_2, sense node PM_2 on induction channel CH_M, realizes each inductive switch unit with this and is coupled to by multiple transmission line 30 one of them induction contact that each responds to channel.
More in detail for example, in one first ON time, only responding to channel CH_1 is coupled between burning voltage VDD and ground terminal voltage GND, accordingly, multiple induction contact P1_1 ~ P1_N on induction channel CH_1 are coupled to corresponding inductive switch cell S W_S1 ~ SW_SN respectively by multiple transmission line 30, and such as, induction contact P1_1 is coupled to inductive switch cell S W_S1,, induction contact P1_N is coupled to inductive switch cell S W_SN.Make multiple induced signals of multiple induction contact P1_1 ~ P1_N on induction channel CH_1 transfer to inductive switch cell S W_S1 ~ SW_SN, then terminate the first ON time.Then, in the second ON time after the first ON time, induction channel CH_2 is coupled between burning voltage VDD and ground terminal voltage GND, and continue above-mentioned similar mode of operation, the multiple induction contact P2_1 ~ P2_N on induction channel CH_2 are made to be coupled to corresponding inductive switch cell S W_S1 ~ SW_SN by multiple transmission line 30, such as, induction contact P2_1 is coupled to inductive switch cell S W_S1, induction contact P2_N is coupled to inductive switch cell S W_SN, and then multiple induced signals of multiple induction contact P2_1 ~ P2_N on induction channel CH_2 are transferred to inductive switch cell S W_S1 ~ SW_SN, accordingly, pass through frequency controller, turn in order induction channel CH_1 ~ CH_M, altogether experience M ON time is carried out the conducting of induction channel CH_1 ~ CH_M, to obtain multiple induced signals of the upper multiple induction contact of induction channel CH_1 ~ CH_M respectively.
Moreover, each comparing unit includes first input end, second input end and output terminal, multiple comparing unit C_1 ~ C_N is coupled to corresponding inductive switch cell S W_S1 ~ SW_SN respectively by respective first input end, multiple induced signals of multiple induction channel CH_1 ~ CH_M upper correspondence induction contact are received with correspondence, such as in the first ON time, comparing unit C_1 ~ C_N is coupled to corresponding inductive switch cell S W_S1 ~ SW_SN by respective first input end, to receive the induced signal of sense node P1_1 ~ P1_N on induction channel CH_1, in the second ON time, comparing unit C_1 ~ C_N is coupled to corresponding inductive switch cell S W_S1 ~ SW_SN by respective first input end, to receive the induced signal of sense node P2_1 ~ P2_N on induction channel CH_2, with this comparing unit C_1 ~ C_N in M ON time, sequentially receive multiple induced signals of the upper corresponding induction contact of induction channel CH_1 ~ CH_M respectively.Multiple comparing unit C_1 ~ C_N the second input end separately will be coupled with critical value V_1 ~ V_N respectively, make each comparing unit can compare the size of received induced signal and corresponding critical value, in a certain ON time, correspondence produces a comparative result by the output terminal of each comparing unit.Processing unit 2040 is coupled to the output terminal of comparing unit C_1 ~ C_N, in order to receive multiple comparative result, and then calculates the touch-control coordinate corresponding to inductive touch pad 20 according to comparative result.For example, in one first ON time, the frequency controller of the first control module, even if making induction channel CH_1 conducting respond to channel CH_1 is coupled between burning voltage VDD and ground terminal voltage GND, multiple induction contact P1_1 ~ P1_N on induction channel CH_1 are coupled to corresponding inductive switch cell S W_S1 ~ SW_SN respectively by the transmission line 30 of correspondence, namely respond to contact P1_1 and be coupled to inductive switch cell S W_S1, induction contact P1_2 is coupled to inductive switch cell S W_S2, induction contact P1_N is coupled to inductive switch cell S W_SN, further comparing unit C_1 receives the induced signal of induction contact P1_1 on induction channel CH_1 by inductive switch cell S W_S1, comparing unit C_2 receives the induced signal of induction contact P1_2 on induction channel CH_1 by inductive switch cell S W_S2, comparing unit C_N receives the induced signal of induction contact P1_N on induction channel CH_1 by inductive switch cell S W_SN, and then compare the size of induced signal and corresponding critical value respectively, produce multiple comparative results of corresponding induction channel CH_1 accordingly, and in other ON time, comparing unit C_1 ~ C_N also will carry out similar compare operation, and then produce multiple comparative results of corresponding different induction channel, and transfer to processing unit 2040.In simple terms, the X-coordinate value of inductive touch pad 200 can draw by the induction channel different according to the conducting in different ON time of the first control module; Second control module 204 is in different ON time, receive multiple induced signals of multiple induction contact on an induction channel, to compare the size of each induced signal and corresponding critical value, and then produce multiple comparative result, make processing unit 2040 according to multiple comparative result, the Y-coordinate value corresponding to inductive touch pad 200 will be produced.In the present embodiment, processing unit 2040 will be implemented by a digital signal processing (DSP) unit, to produce corresponding to the touch-control coordinate on inductive touch pad 200.
In addition, in the present embodiment, critical value V_1 ~ V_N that multiple corresponding second input end of comparing unit C_1 ~ C_N receives represents by a linearity curve.Please refer to Fig. 3 A and Fig. 3 B, Fig. 3 A is the schematic diagram of the embodiment of the present invention one without the linearity curve of touch-control, and Fig. 3 B is the schematic diagram of the embodiment of the present invention one linearity curve of touch-control.As shown in Figure 3A, suppose touch-control system 20 conducting induction channel CH_1 in one first ON time, and user does not press inductive touch pad 200, in the case, corresponding each critical value received of multiple second input ends of comparing unit C_1 ~ C_N is by equation of line
represent, wherein symbol V represents voltage stabilizing control module and voltage difference between control module is held on ground, (N+1) quantity of the conductor element that channel comprises is responded in representative, symbol n represents the quantity of the conductor element between a certain sense node and ground end control module, symbol R be the resistance of conductor element E (in the present embodiment, the resistance of definition conductor element is R), the induced signal value that the first input end of the Q comparing unit that sense node is corresponding for this reason receives.Because of inductive touch pad without touch-control time, the critical value that the second input end of this induced signal value also comparing unit that sense node is corresponding for this reason receives.So, voltage difference V is divided into multiple decile inductive voltage value by multiple conductor elements of each induction channel
be the cross-pressure corresponding to each conductor element, the quantity n of the conductor element between so a certain sense node and ground end control module and decile inductive voltage value
product be the critical value that the second input end of comparing unit corresponding to this sense node receives.For example, the quantity of the conductor element between sense node P1_N and ground end control module is 1, i.e. n=1, then the critical value that the first input end of comparing unit C_N receives is
in like manner, the critical value that the first input end of the comparing unit C_ (N-1) that sense node P1_ (N-1) is corresponding receives is
, the critical value that the first input end of the comparing unit C_1 that sense node P1_1 is corresponding receives is
accordingly, processing unit will store the linearity curve L1 shown in Fig. 3 A, in advance using the reference as follow-up comparison.In conjunction with reference to figure 2 and Fig. 3 B, in the first ON time, induction channel CH_1 is coupled to voltage stabilizing control module 2020 and ground is held between control module 2022, multiple induction contact P1_1 ~ P1_N on induction channel CH_1 are coupled to corresponding inductive switch cell S W_S1 ~ SW_SN respectively by the transmission line 30 of correspondence, when user presses inductive touch pad 200, and position of touch is just in time responding to the one on channel CH_1 in multiple induction contact P1_1 ~ P1_N, multiple induced signals that comparing unit C_1 ~ C_N will receive from inductive switch cell S W_S1 ~ SW_SN, it also represents by following equation of line, namely
Wherein Δ R is for conductor element E is because of pressing produced resistance change.The induced signal of comparing without the linearity curve L1 of touch-control, linearity curve L2 produces difference and is from the n of touch point
in other words, comparing unit will in identical n value, alternative line linearity curve L1 and the Q value difference corresponding to linearity curve L2 different, if produce difference as shown in Figure 3 B, processing unit 2040 can judge the Y-coordinate of the induction contact of user institute touch-control, the induction channel of the first control module record now conducting simultaneously obtains the X-coordinate of the induction contact of user institute touch-control, and then obtains induction contact relative to the touch-control coordinate on inductive touch pad 200.
In the present embodiment, touch-control system 20 can utilize processing unit 2040 to prestore to have linearity curve L1 and linearity curve L2 at least, to judge whether the induction channel of institute's conducting in different ON time produces the difference of Q value at each induction contact, and then judge the Y-coordinate of induction contact of user institute touch-control, and the X-coordinate of touch point can be drawn by the induction channel of the conducting of the first control module record, thus draw the touch-control coordinate on inductive touch pad 200.Certainly, those skilled in the art also by the multiple induced signals corresponding to the multiple induction contacts on multiple induction channel, can save as multiple matrix units of M × N matrix, and then set up the induced signal look-up table of a corresponding inductive touch pad coordinate.Please refer to Fig. 4 and Fig. 5, Fig. 4 is the schematic diagram of the embodiment of the present invention one without the induced signal look-up table of touch-control, and Fig. 5 is the schematic diagram of the embodiment of the present invention one induced signal look-up table of touch-control.Incorporated by reference to reference to figure 2 and Fig. 4, after touch-control system 20 sequentially completes conducting operation (namely through M ON time) of all induction channel CH_1 ~ CH_M, processing unit 2040 also includes a storage element (not shown), correspondence stores multiple induced signals of different induction contact on different ON time, different induction channel, when without touch-control, the plurality of induced signal is multiple critical value.As shown in Figure 4 without the first row induction channel CH_1 of the induced signal look-up table TB1 of touch-control, its measurement magnitude of voltage near first induction contact of earth terminal voltage GND is
(cross-pressure that namely a conductor element is corresponding), and sequentially up increase progressively for
other can respond to the induced signal of channels by that analogy.If user has touch-control sensing Trackpad 200, and touch location is when responding to channel CH_3, the 3rd row induction channel CH_3 of the induced signal look-up table TB2 of touch-control as shown in Figure 5, its first induction contact near earth terminal voltage GND also has identical magnitude of voltage to be
and sequentially up increase progressively for
induced signal produces difference from the n of touch point
accordingly, processing unit 2040 operates by a coordinate transformation, the relative position of induced signal look-up table TB2 is converted to the touch-control coordinate on inductive touch pad 200, and completes the associative operation of touch-control coordinate.Such as, the induced signal look-up table in comparison diagram 4 and Fig. 5, the horizontal ordinate of known touch point is 3, and ordinate is n.
In the present invention, touch-control system 20 the control method 60 that is suitable for comprise following steps:
Step 600: start.
Step 602: this first control module produces a control signal, make one end and this voltage stabilizing control module conducting of those induction channels, control module conducting is held on the other end and this ground, and those sense node of those induction channels produce multiple induced signal.
Step 604: this second control module receives those induced signals, produces multiple comparative result according to those induced signals.
Step 606: this second control module calculates at least one touch-control coordinate corresponding to this inductive touch pad according to those comparative results.
Step 608: terminate.
The detailed operation of each step in control method 60, can illustrate with reference to the relevant paragraph of previous embodiment and Fig. 2 to Fig. 6, be not repeated herein.Notably, the first control module also includes a frequency controller (not shown), and can inductive switch cell S W_S1 ~ SW_SN, comparing unit C_1 ~ C_N and processing unit 2040 in synchronous second control module 204.In the case, in step 602 and step 606, when the first control module generation control signal carrys out one of them induction of conducting channel CH_1 ~ CH_M, second control module 204 also adaptive ground receives multiple induced signals of multiple induction contact on this induction channel switched on, multiple induced signal is stored for the column matrix numerical value in induced signal look-up table with correspondence, and then save as induced signal look-up table with correspondence after the conducting sequentially completing induction channel CH_1 ~ CH_M, judge whether that difference produces by processing unit 2040 again, and then the touch-control coordinate produced relative to inductive touch pad 200.Certainly, those skilled in the art also adaptive add other handover mechanism and control signal, make the first control module and the second control module 204 can coordinate the matrix size of M × (N+1) that on inductive touch pad 200, multiple conductor element is formed, or the conducting situation person of adaptive adjustment induction channel CH_1 ~ CH_M can be carried out according to the material behavior of inductive touch pad 200, be all category of the present invention.
Compared to known technology, the touch-control system 20 that the present embodiment provides is only applicable to inductive touch pad 200, touch-control system 20 only needs the conducting sequentially completing induction channel CH_1 ~ CH_M, the induction coordinate relative to inductive touch pad 200 can be judged, its relative sweep time can significantly reduce, and scan efficiency significantly promotes.In addition, those skilled in the art also can judge voluntarily inductive touch pad 200 comprise the quantity number of conductor element, and then determine the induction channel CH_1 ~ CH_M of whether only turning part, or compartment of terrain conducting induction channel CH_1 ~ CH_M, with the induced signal look-up table of the different line number/columns of correspondence establishment, and then the treatment effeciency of simplify processes unit 2040 or computing time etc., be not used to limit category of the present invention.
In sum, the touch-control system that the embodiment of the present invention provides and control method thereof, by the first control module and the second control module, multiple induction channel on turn in order inductive touch pad, to obtain the induced signal of the multiple induction contacts mutually coupling formation between multiple conductor element within the different sensitive time respectively, the second control module energy adaptive is made to judge whether to have produced between multiple induced signal the difference of a linearity curve, the corresponding touch-control coordinate judged relative to inductive touch pad.Compared to known technology, the present embodiment signal transacting efficiency is high, and can avoid the touch control electrode using double layer planar, increases touch-control system simultaneously and supports antimierophonic effect, to increase the range of application of touch-control system.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. a touch-control system, is characterized in that, includes:
One inductive touch pad, includes multiple induction channel, and each induction channel includes multiple conductor elements of serial connection mutually, and wherein contact is responded in every two conductor element serial connection place's formation one;
One first control module, is coupled to those multiple induction channels, and comprises a voltage stabilizing control module and ground end control module, and one end of each induction channel is coupled to this voltage stabilizing control module, and the other end is coupled to this ground end control module; And
One second control module, is coupled to the plurality of induction contact, receives multiple induced signals of the plurality of induction contact in order to correspondence, and calculates at least one touch-control coordinate corresponding to this inductive touch pad according to the plurality of induced signal.
2. touch-control system as claimed in claim 1, it is characterized in that, this voltage stabilizing control module comprises multiple stabilized switch unit; And this ground end control module includes multiple ground end switch unit; Wherein, one end of each induction channel is coupled to this stabilized switch unit, and the other end is coupled to this ground end switch unit.
3. touch-control system as claimed in claim 2, it is characterized in that, this first control module also includes a frequency controller, is coupled to this first control module, and makes respectively this induction channel sequentially be coupled to respectively this stabilized switch unit corresponding to this induction channel and each this ground end switch unit.
4. touch-control system as claimed in claim 1, it is characterized in that, this second control module includes:
Multiple inductive switch unit, wherein each inductive switch unit is coupled to one of them induction contact of each induction channel by multiple transmission line;
Multiple comparing unit, is coupled to the plurality of inductive switch unit, is used for receiving the induced signal that those respond to contacts, and is compared to produce a comparative result with a critical value by this induced signal; And
One processing unit, is coupled to this comparing unit, in order to receive this comparative result, and then calculates this touch-control coordinate corresponding to this inductive touch pad according to this comparative result.
5. touch-control system as claimed in claim 4, it is characterized in that, this comparing unit comprises:
One first input end, is coupled to this inductive switch unit, is used for receiving the induced signal of this induction contact;
One second input end, is used for receiving this critical value; And
One output terminal, is used for exporting this comparative result to this processing unit.
6. touch-control system as claimed in claim 5, is characterized in that, those critical values are that without during touch-control, those respond to magnitude of voltage corresponding to contacts to this inductive touch pad.
7. touch-control system as claimed in claim 1, is characterized in that, the resistance equal and opposite in direction of those conductor elements.
8. a control method for touch-control system as claimed in claim 1, comprises step:
A) this first control module produces a control signal, and make one end and this voltage stabilizing control module conducting of those induction channels, control module conducting is held on the other end and this ground, and those sense node of those induction channels produce multiple induced signal;
B) this second control module receives those induced signals, produces multiple comparative result according to those induced signals;
C) this second control module calculates at least one touch-control coordinate corresponding to this inductive touch pad according to those comparative results.
9. control method as claimed in claim 8, is characterized in that, this step a) comprises those induction channels and is sequentially coupled between this voltage stabilizing control module and this ground holds and control.
10. control method as claimed in claim 8, is characterized in that, this step b) comprise and those induced signals are compared one by one with the critical value preset, and produce multiple comparative result.
11. control methods as claimed in claim 10, is characterized in that, those critical values are that without during touch-control, those respond to magnitude of voltage corresponding to contacts to this inductive touch pad.
12. control methods as claimed in claim 10, it is characterized in that, those comparative results are the difference of those induced signals and those critical values.
13. control methods as claimed in claim 10, is characterized in that, also comprise step: set up an induced signal look-up table according to those critical values, step b) comprise and those induced signals are compared with this induced signal look-up table, and produce those comparative results.
14. control methods as claimed in claim 10, is characterized in that, the resistance equal and opposite in direction of those conductor elements.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310409670.4A CN104423768B (en) | 2013-09-10 | 2013-09-10 | Touch-control system and its control method |
| TW103211003U TWM495562U (en) | 2013-09-10 | 2014-06-20 | Touch system |
| TW103121402A TWI628561B (en) | 2013-09-10 | 2014-06-20 | Touch system and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310409670.4A CN104423768B (en) | 2013-09-10 | 2013-09-10 | Touch-control system and its control method |
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| Publication Number | Publication Date |
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| CN104423768A true CN104423768A (en) | 2015-03-18 |
| CN104423768B CN104423768B (en) | 2018-04-17 |
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| CN201310409670.4A Active CN104423768B (en) | 2013-09-10 | 2013-09-10 | Touch-control system and its control method |
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| Country | Link |
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| CN (1) | CN104423768B (en) |
| TW (2) | TWM495562U (en) |
Cited By (1)
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| CN113358012A (en) * | 2020-03-06 | 2021-09-07 | 深圳普赢创新科技股份有限公司 | Electromagnetic induction type coordinate positioning device |
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| US20090050376A1 (en) * | 2007-08-21 | 2009-02-26 | Jin Jeon | Method of detecting a touch position and touch panel for performing the same |
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| CN113358012B (en) * | 2020-03-06 | 2022-12-02 | 深圳普赢创新科技股份有限公司 | Electromagnetic induction type coordinate positioning device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104423768B (en) | 2018-04-17 |
| TWI628561B (en) | 2018-07-01 |
| TW201510813A (en) | 2015-03-16 |
| TWM495562U (en) | 2015-02-11 |
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