CN101876862A - Control circuit suitable for touch screen - Google Patents
Control circuit suitable for touch screen Download PDFInfo
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- CN101876862A CN101876862A CN2009101375032A CN200910137503A CN101876862A CN 101876862 A CN101876862 A CN 101876862A CN 2009101375032 A CN2009101375032 A CN 2009101375032A CN 200910137503 A CN200910137503 A CN 200910137503A CN 101876862 A CN101876862 A CN 101876862A
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Abstract
The invention provides a control circuit suitable for a touch screen. The screen comprises a plurality of external signal reading wires. Based on the conventional control circuit, the control circuit comprises a host machine terminal, an analog-to-digital converter and a voltage bias voltage controller, wherein a multiplexer is arranged between the touch screen and the analog-to-digital converter. In one embodiment, a plurality of identification zones of the touch screen simultaneously receive a plurality of input information; a plurality of input terminals of the multiplexer receive a plurality of correspondingly-generated voltage signals through the external signal reading wires which are correspondingly connected with the input terminals, and selectively output a plurality of analog signals which comprise all selected or partially selected external signal reading wires according to the appointed state of a selection signal in the host machine terminal or the multiplexer; the analog-to-digital converter converts the analog signals into corresponding digital signals; and the host machine terminal judges whether to output the digital signals according to a preset state which is associated with the identification zones.
Description
Technical field
The present invention relates to a kind of control circuit that is applicable to touch-screen, with the resistive touch screen is example, be meant that especially a kind of control circuit can reach purpose result's (once obtaining more than one group of (X-axis, Y-axis) coordinate values) that multiple spot reads for the identified region of this resistive touch screen.
Background technology
Touch-screen (Touch panel) is called contact panel again, it is a screen that can receive contact input signals such as (no matter being finger or glue nib etc.), it is preceding to be installed on LCD (LCD), when having contacted the graphic button on the screen, haptic feedback system on the screen can be according to the various hookup mechanisms of driven by program of programming in advance, can be in order to the push button panel of dessert machine tool formula, and produce lively visual and sound effects by liquid crystal display picture.
Briefly, but touch-screen refers to a kind of screen of touch, normally covers one deck pressure plare on the LCD liquid crystal panel, and it has high sensitive to pressure, when object is exerted pressure thereon, have current signal and produce making the pressure source position, but and dynamic tracing.
Be broadly divided into five classes with regard to existing market Touch Panel manufacturing technology kind (table 1.1):
1. resistance-type (resistive), 2. condenser type (capacitive), 3. sound wave type (acoustic), 4. projecting type capacitor (projected capacitive) and 5. infrared-types (infrared rays).
Table 1.1 Touch Panel manufacturing technology kind
And be example with the resistive touch screen that often uses on the market, and please refer to Fig. 1, it is the principle of work synoptic diagram of habitual electric resistance touch-control panel.For electric resistance touch-control panel 1, it has last conductive layer 11 and lower conductiving layer 12, also separates with separation material 13 (not shown)s in the middle of last conductive layer 11 and the lower conductiving layer 12.Lower conductiving layer 12 be provided with many voltage grading electrodes and many auxiliary electrodes all around respectively, and the voltage grading electrode and the auxiliary electrode that are positioned at the relative edge are parallel to each other, the voltage grading electrode that is positioned at adjacent edge is to be perpendicular to one another with auxiliary electrode.Be positioned at the voltage grading electrode of one group of opposite side that is parallel to each other wherein and auxiliary electrode is common forms two X circuit 121,121 ', and be positioned at two Y circuit 122,122 ' of voltage grading electrode and the common formation of auxiliary electrode of the opposite side that another group is parallel to each other.
Hold, utilize the voltage drop that forms a 5V between two X circuit 121,121 ', and utilize the voltage drop that forms another 5V between two Y circuit 122,122 '.When contact panel 1 is touched by the user, just can by last conductive layer 11 detect lower conductiving layer 12 touched locas voltage swing, detected magnitude of voltage is obtained its coordinate values after sending the controller (not shown) to.And more unfortunately, when the user touches two or more at the identified region of resistive touch screen simultaneously, then still be unrealized at present for fear of prior art.
Even, for apply to PDA, cash machine as resistive touch screen, during to industrial touch control computer, (user interface) epigraph of the man-machine interface on its touch-screen and with the internal circuit running aspect of corresponding electric connection also be the design viewpoint that the developer need consider.Say that simply the man-machine interface on resistive touch screen provides following manner and user to carry out interaction:
Input information pattern: provide the user to manipulate with a plurality of different images options or literal input frame (being referred to as identified region).
The output information pattern: touch-screen correspondingly shows the result that its internal circuit is handled according to user institute input information.
Institute undesirably, on the identified region of resistive touch screen, because of the user when the loading routine of the enterprising line data information of identified region, if the user who touches other during the desired images option, does not make can demonstrate the result who is not supposed to immediately in the output information pattern that is built in this resistive touch screen.
The output information pattern of carrying out signal Processing simultaneously in the time of hereat, touching two or more for the identified region of touch-screen (is example as resistive touch screen) if any a kind of circuit and being built in this resistive touch screen can not demonstrate the result that the user is not supposed to and should press for.
Summary of the invention
A purpose of the present invention provides a kind of control circuit that is applicable to touch-screen, with the resistive touch screen is example, this resistive touch screen has a plurality of outer signal read lines, based on the general traditional host side that control circuit comprised, an analog to digital converter (A/D Converter) and voltage bias controller, especially, this control circuit of the present invention is provided with a multiplexer between this resistive touch screen and this analog to digital converter.In an embodiment, a plurality of identified regions of this resistive touch screen receive a plurality of input informations when (also referring to more than at least two input informations) simultaneously, the outer signal read line of a plurality of input ends of this multiplexer by its corresponding connection is to receive the corresponding a plurality of voltage signals that produced, and this multiplexer is optionally exported according to the designated state of establishing a selection signal in this host side or this multiplexer and is comprised a plurality of simulating signals that all have been selected or partly have been selected the information of a plurality of outer signal read lines, to reach purpose result's (once obtaining) that multiple spot reads more than one group of (X-axis, Y-axis) coordinate values.
Secondly, mentioned multiplexer in first embodiment, in one second embodiment, also can carry out with a plurality of independent reading units (also referring to more than at least two independent reading units), and each independent reading unit disposes an analog to digital converter respectively, when the identified region that touches this resistive touch screen as the user repeatedly (also refers at least more than the secondary), also can reach purpose result's (once obtaining) that multiple spot reads more than one group of (X-axis, Y-axis) coordinate values.
Especially, demonstrate the scarce plain of the result that is not supposed to for known touch screens, the present invention also provides the scheme of a kind of circuit and software design, when the user's enterprising line data input information of a plurality of identified regions program on this resistive touch screen, if the user who touches other is not during the desired images option, this multiplexer in this control circuit is optionally exported according to the designated state of establishing a selection signal in this host side or this multiplexer and is comprised a plurality of simulating signals that all have been selected or partly have been selected the information of a plurality of outer signal read lines, and after this analog to digital converter is converted to corresponding those digital signals, then, be converted to digital signal corresponding through this analog to digital converter, differentiate with decision whether export those digital signals via driver in this host side or application program according to a predetermined state that is associated with those identified regions at last.
Carrying out the purpose result that multiple spot reads with a plurality of independent reading units (also referring to more than at least two independent reading units) in one second embodiment (once obtains more than one group of (X-axis, Y-axis) coordinate values), each independent reading unit also can be designed to: the correspondingly conversion or not converting analogue signals according to a preset state separately of each independent reading unit.In the same manner, replace that this multiplexer that is configured between this resistive touch screen and this analog to digital converter is correspondingly changed or not behind the converting analogue signals with a plurality of independent reading units, after analog to digital converter through correspondingly connecting separately is converted to correspondingly digital signal, differentiate with decision whether export those digital signals with a driver or application program in this host side that those analog to digital converters are connected according to a predetermined state that is associated with those identified regions, also make this resistive touch screen only demonstrate the desired result of user.
According to above-mentioned purpose, the invention provides a kind of control circuit that is applicable to touch-screen, with the resistive touch screen is example, wherein this resistive touch screen has a plurality of outer signal read lines (pick-up line), and this resistive touch screen synchronously receives a plurality of input informations, and wherein this control circuit comprises:
One multiplexer (multiplexer), input end, a selecting side and an output terminal with predetermined quantity that is connected with those outer signal read lines, and this multiplexer is by receiving those input informations with those outer signal read lines that those input ends correspondingly are connected, reach foundation one and select signal and export a simulating signal, wherein this simulating signal comprises the information that is selected a plurality of outer signal read lines;
One analog to digital converter (A/D Converter) becomes a digital signal by this output terminal of this multiplexer with this analog signal conversion;
One host side wherein should be selected signal system to be produced by this host side, and carry out a specified handler according to this digital signal; And
One voltage bias controller produces a bias voltage signal that comprises a plurality of bias values according to the control bias voltage signal from this host side.
According to above-mentioned another purpose, the invention provides a kind of control circuit that is applicable to touch-screen, is example with the resistive touch screen, and wherein this resistive touch screen has a plurality of outer signal read lines, and this resistive touch screen synchronously receives a plurality of input informations, and this control circuit comprises:
A plurality of independent reading units couple with those outer signal read lines respectively, and those independent reading units receive those input informations to produce a plurality of simulating signals respectively by corresponding those outer signal read lines of institute;
A plurality of analog to digital converters couple with those independent reading units respectively, and those analog to digital converters are a plurality of digital signals to those analog signal conversion;
One host side couples with those analog to digital converters, and carries out a specified handler according to those digital signals; And
One voltage bias controller is to produce a bias voltage signal that comprises a plurality of bias values according to the control bias voltage signal from this host side.
Description of drawings
For above-mentioned and other purposes of the present invention, feature, advantage and embodiment can be become apparent, being described in detail as follows of accompanying drawing:
Fig. 1 is the synoptic diagram of the internal circuit of habitual electric resistance touch-control panel.
Fig. 2 is the schematic configuration diagram of traditional resistive touch screen.
Fig. 3 is the synoptic diagram of the circuit of a control circuit of the present invention and a resistive touch screen.
Fig. 4 is the synoptic diagram of the circuit of another control circuit of the present invention and a resistive touch screen.
[main element symbol description]
1 electric resistance touch-control panel
Conductive layer on 11
12 lower conductiving layers
121,121 ' X circuit
122,122 ' Y circuit
2 resistive touch screens
Conductive film on 22
22 ' time conductive film
23 partitions
24 outer signal read lines
3 control circuits
31 multiplexers
32 analog to digital converters
33 host side
34 voltage bias controllers
4 resistive touch screens
41 outer signal read lines
5 control circuits
51 independent reading units
52 analog to digital converters
53 host side
54 voltage bias controllers
8 resistive touch screens
81 outer signal read lines
Embodiment
Generally speaking, existing technology can't satisfy carries out signal Processing and if the user touches other not during the desired images option, the output information pattern that is built in this resistive touch screen can demonstrate the result that the user is not supposed to simultaneously when touching two or more for the identified region of touch-screen.
A kind of control circuit proposed by the invention also can overcome above-mentioned scarce plain, and this control circuit is applicable to 1. resistance-types (resistive), 2. condenser type (capacitive), 3. sound wave type (acoustic), the 4. touch-screen of projecting type capacitor (projected capacitive) and 5. infrared-types (infrared rays) this type.
Present embodiment illustrates summary with resistive touch screen, by the resistive touch screen that control circuit used proposed by the invention is based on general traditional resistive touch screen 2, be to utilize indium tin oxide-coated glass 21 (ITO Glass) and go up to reach conductive film (ITO Film) 22 down, 22 ' is main material, simultaneously between the electro-conductive glass of the conductive film on upper strata and lower floor, be provided with the some partition 23 (Dot Spacer) that struts the space, and this resistive touch screen has a plurality of outer signal read lines 24 (pick-up line), as shown in Figure 2.
The first embodiment explanation
And illustrate than detail circuits for this control circuit, as shown in Figure 3, this control circuit 3 comprises a multiplexer 31 (multiplexer), an analog to digital converter 32 (A/D Converter), a host side 33 and a voltage bias controller 34, and be that this multiplexer 31 is connected with those outer signal read lines 41 of this resistive touch screen 4 electrically by the input end of predetermined quantity itself for what the annexation of this multiplexer 31 and this resistive touch screen 4 also need be told about.And the input end of aforementioned mentioned predetermined quantity add up to can more than, be equal to or less than those outer signal read line 41 quantity of this resistive touch screen 4.In first embodiment explanation, those input ends N that this multiplexer 31 has
1～N
nN those outer signal read lines 41 quantity M that equal this resistive touch screen 4 of sum
1～M
nSum N illustrates for representative, and wherein N is one at least greater than 2 positive integer.
Hold shown in Figure 2, when touching the conductive film on upper strata, finger, pointer or other media side by side touch many places when above (or at least one place), also be that a plurality of identified regions of this resistive touch screen 4 side by side receive a plurality of input informations and make the levels electrode conduction and side by side produce a plurality of voltage signals (or receiving at least one input information correspondingly produces a voltage signal), in first embodiment, be implementation 2 times side by side to two preliminary election block A1 and A2 (seeing shown in Figure 3) touching at the identified region of this resistive touch screen 4 with finger.
Yet, make us understanding ground, when side by side touching A1 and A2 two preliminary election blocks, the levels electrode in this resistive touch screen 4 can conducting also side by side produce one first voltage signal V1 and one second voltage signal V2 (wherein, those voltage signals V1 and V2 all are considered as a kind of simulating signal).For this first voltage signal V1 that is to have been produced in this resistive touch screen 4 and this second voltage signal V2 then by its one first outer signal read line N of those outer signal read lines of corresponding connection
1And one second outer signal read line N
2Be transferred into together and two outer signal read line N
1And N
2One first input end M of this multiplexer of corresponding connection
1And one second input end M
2, to carry out the signal reason.
Ground is known by behaviour institute, and this multiplexer 31 is a kind of gauge tap (controlledswitch) in Fig. 3, as this first input end M of this multiplexer 31
1And this second input end M
2Receive respectively from this first outer signal read line N
1This first voltage signal V1 and from this second outer signal read line N
2This second voltage signal V2 the time, this multiplexer 31 can receive one by its selecting side S who has and select signal S
P, and according to this selection signal S
PDesignated state and export one of them of those voltage signals V1 and V2 by the output terminal Z that it has, wherein aforementionedly should select signal S
PBe by these host side 33 generations or by establishing in this multiplexer 31.No matter and by these host side 33 generations or by this selection signal S that establishes in this multiplexer 31
P, wherein should select signal S
PDesignated state by artificially being scheduled to.Ground is known by institute, and the programmer receives this selection signal S for this selecting side S of this multiplexer 31
PDesignated state be to design by a hardware description language program, a high-level language programs or a low-level language program.
Say that according to aforementioned institute in this first embodiment, desirably, this multiplexer 31 is selected signal S according to this
PDesignated state go out for this first voltage signal V1 is earlier selected, and from this first input end M of this multiplexer 31
1This first voltage signal V1 that is received then is sent to this analog to digital converter 32 to carry out an analog to digital conversion program by this output terminal Z of this multiplexer 31.
Hold, usually, this analog to digital converter 32 can be a digital signal that comprises a plurality of numerical codes with an input analog voltage conversion of signals, can spread to ground, in this control circuit 3, be configured in this analog to digital converter 32 of electrically connecting with this output terminal Z of this multiplexer 31 and carry out the analog to digital conversion program to change out a digital signal that comprises a plurality of numerical codes for this first voltage signal V1 from this output terminal Z of this multiplexer 31.
Constantly, this first voltage signal V1 that is converted into digital signal is transferred into this host side 33 that electrically connects with this analog to digital converter 32, and afterwards, this host side 33 is carried out a specified handler according to this digital signal.Need to explain, be the specified handler that this host side 33 is carried out, as exert pressure a plurality of coordinate positions of medium of calculating, or every and another some distance of being separated by or the like.
At the same time, this host side 33 or produce a control bias voltage signal C by a control bias circuit (not shown)
S, and this voltage bias controller 34 in this control circuit 3 is according to this control bias voltage signal C from this host side 33
SAnd generation comprises a bias voltage signal B of a plurality of bias values
S
Similarly, at this first voltage signal V1 after this analog to digital converter 32 carries out analog digital conversion, from this second outer signal read line N
2This second voltage signal V2 select signal S through this selecting side of this multiplexer 31 S institute according to this
PThis output terminal Z of designated state by this multiplexer 31 be sent to this analog-digital converter 32 to carry out an analog to digital conversion program, and be converted out another digital signal that comprises a plurality of numerical codes, can spread to ground, its subsequent processes of this second voltage signal V2 that is converted into digital signal is identical with this first voltage signal V1, so needn't write at this.
Especially, demonstrate the scarce plain of the result that is not supposed to for known this resistive touch screen 4, be configured in 31 aforementioned those language program of foundation of this multiplexer between this resistive touch screen 4 and this analog to digital converter 32 the program that contains a plurality of discriminants of design in advance read.
For instance, in the two preliminary election block A1 and A2 of the identified region of this resistive touch screen 4, when desired ground of user desire is carried out the literal input information to preliminary election block A1, touch preliminary election block A2 because of carelessness, instantaneous, this first input end M of this multiplexer 31
1And this second input end M
2Receive respectively from this first outer signal read line N
1This first voltage signal V1 and from this second outer signal read line N
2This second voltage signal V2, at this moment, this multiplexer 31 can have this selecting side S by it and receive this selection signal S that contains a plurality of discriminant programs
PCarry out discriminating program, can export in regular turn from this first outer signal read line N at this output terminal Z of this multiplexer 31
1This first voltage signal V1 and from this second outer signal read line N
2One of this second voltage signal V2.Be same as previous explanation, these a little voltage signal V1 and V2 this analog to digital converter 32 of ground warp in regular turn are converted to one first digital signal and one second digital signal that comprises a plurality of numerical codes, at this moment, this host side 33 receives those digital signals respectively, and the driver or the application program that reach in this host side 33 differentiate with decision whether export those digital signals according to a predetermined state that is associated with those identified regions (with preliminary election block A1 and A2 example).Ground is known by institute, this that expect second digital signal does not determine to not exporting according to this predetermined state via this driver or application program, makes that the output information pattern at this resistive touch screen 4 only demonstrates the desired information result of user (also referring to preliminary election block A1).
And on a plurality of cog regions of this resistive touch screen 4, touch one not during the desired images option for the user, under the situation that this host side 33 is differentiated according to a predetermined state that is associated with those identified regions, make can not demonstrate the result who is not supposed in the output information pattern that is built in this resistive touch screen 4.
The second embodiment explanation
Based on the multiplexer that between this resistive touch screen and this analog to digital converter, is disposed mentioned in first embodiment, the present invention proposes another kind of control circuit 5, and in the same manner, this resistive touch screen 8 has a plurality of outer signal read lines 81, as shown in Figure 4.
Hold, as shown in Figure 4, this control circuit 5 comprises: a plurality of independent reading units 51, a plurality of analog to digital converter 52, a host side 53 and a voltage bias controller 54, and each independent reading unit couples with each outer signal read line respectively, and each only analog to digital converter couples with each independent reading unit respectively, in other words, the quantity of those independent reading units, those outer signal read lines and those analog to digital converters is identical.Below be that second embodiment illustrates introduction.
Hold shown in Figure 2, when finger, pointer or other media touch touching side by side repeatedly when at least once above (or) to the conductive film on upper strata, also be that a plurality of identified regions of this resistive touch screen 8 side by side receive a plurality of input informations and make the levels electrode conduction and side by side produce a plurality of voltage signals (or receiving at least one input information correspondingly produces a voltage signal), in second embodiment, be implementation (seeing shown in Figure 4) 2 times side by side to two preliminary election block A1 and A2 touching at the identified region of this resistive touch screen 8 with finger.
Make us understanding ground, when side by side touching this two preliminary elections block of A1 and A2, levels electrode in this resistive touch screen 8 can conducting also side by side produce one first voltage signal V1 and one second voltage signal V2 (wherein, those voltage signals V1 and V2 all are considered as a kind of simulating signal).For this first voltage signal V1 that is to have been produced in this resistive touch screen 8 and this second voltage signal V2 then by its one first outer signal read line N of those outer signal read lines of corresponding connection
1And one second outer signal read line N
2Be transmitted one first independent reading unit U1 and one second independent reading unit U2 that it correspondingly was connected together.
Synchronously, this first independent reading unit U1 with reception from this first outer signal read line N
1This first voltage signal V1 be converted to one first simulating signal P1 and this second independent reading unit U2 with reception from this second outer signal read line N
2This second voltage signal V2 be converted to one second simulating signal P2, then, carry out the analog digital conversion via one first analog to digital converter C1 and one second analog to digital converter respectively from this first simulating signal P1 of this first independent reading unit U1 and from this second simulating signal P2 of this second independent reading unit U2, so that this first simulating signal P1 and this second simulating signal P2 are converted to one first digital signal D1 and one second digital signal D2, then, be sent in this host side 53 from this first digital signal D1 of this first analog to digital converter C1 and this second digital signal D2 of this second analog to digital converter C2, carry out a specified handler with this host side 53 that each analog to digital converter electrically connects according to those digital signals D1 and D2, need to explain, be the specified handler that this host side 53 is carried out, as exert pressure a plurality of coordinate positions of medium of calculating, or every and another some distance of being separated by or the like.
At the same time, this host side 53 or produce a control bias voltage signal C by a control bias circuit (not shown)
S, and this voltage bias controller 54 in this control circuit 5 is according to this control bias voltage signal C from this host side 53
SAnd generation comprises a bias voltage signal B of a plurality of bias values
S
In aforementioned second embodiment, realize that with a plurality of independent reading units (also referring to more than at least two independent reading units) the purpose result that multiple spot reads (once obtains more than one group of (X-axis, Y-axis) coordinate values), demonstrate the scarce plain of the result that is not supposed in overcoming known this resistive touch screen, the circuit of those independent reading units can be designed to: each independent reading unit according to a preset state separately (as with cloth woods value 1 for carrying out conversion of signals, cloth woods value is 0 not carry out conversion of signals) and correspondingly conversion or not the predetermined state that is associated with those identified regions of the interior driver of converting analogue signals and this host side 53 or application programs foundation differentiate to determine whether to export those digital signals.
For instance, in the two preliminary election block A1 and A2 of the identified region of this resistive touch screen 8, when desired ground of user desire is carried out the literal input information to preliminary election block A1, touch preliminary election block A2 because of carelessness, instantaneous, be this first voltage signal V1 of having been produced in this resistive touch screen 8 and this second voltage signal V2 then by its one first outer signal read line N of those outer signal read lines of corresponding connection
1And one second outer signal read line N
2Be transmitted one first independent reading unit U1 and one second independent reading unit U2 that it correspondingly was connected together.
Synchronously, this first independent reading unit U1 is converted to this first simulating signal P1 from this first voltage signal V1 of this first outer signal read line N1 and according to self a preset state (cloth woods value is 1) with this first voltage signal V1 with reception, reach this second independent reading unit U2 with reception from this second outer signal read line N
2This second voltage signal V2 and according to self a preset state (cloth woods value is 1) this second voltage signal V2 is converted to this second simulating signal P2.
Be same as previous explanation, then, carry out the analog digital conversion via one first analog to digital converter C1 and one second analog to digital converter C2 respectively from this first simulating signal P1 of this first independent reading unit U1 and from this second simulating signal P2 of this second independent reading unit U2, so that this first simulating signal P1 and this second simulating signal P2 are converted to one first digital signal D1 and one second digital signal D2, then, be sent in this host side 53 from this first digital signal D1 of this first analog to digital converter C1 and this second digital signal D2 of this second analog to digital converter C2, at this moment, this host side 53 receives those digital signals D1 and D2 respectively, and the driver in this host side 53 or application program differentiate with decision whether export those digital signals D1 and D2 according to a predetermined state that is associated with those identified regions (with preliminary election block A1 and A2 example).Ground is known by institute, and undesirably this second digital signal D2 determines to not exporting according to this predetermined state via this driver or application program.The output information pattern at this resistive touch screen 8 that also makes only demonstrates the information result (also referring to preliminary election block A1) of user's expectation.
And on a plurality of cog regions of this resistive touch screen 8, touch one not during the desired images option for the user, under the situation that this host side 53 is differentiated according to a predetermined state that is associated with those identified regions, make can not demonstrate the result who is not supposed in the output information pattern that is built in this resistive touch screen 8.
At last, note ground, by control circuit proposed by the invention, a plurality of identified regions that mainly provide at contact panel side by side advance the multiple spot processing, therefore read the purpose result as long as utilization control circuit of the present invention all can reach multiple spot.
And among first embodiment, if a plurality of identified regions of this resistive touch screen receive at least two input informations simultaneously, then the quantity of a plurality of outer signal read lines of resistive touch screen can be designed at least two input ends, therefore, aforementioned " multiplexer " can be designed to have at least two input ends, a selecting side and an output terminal, and this multiplexer is by receiving this at least two input informations with these at least two outer signal read lines that these at least two input ends correspondingly are connected.
And among second embodiment, if a plurality of identified regions of this resistive touch screen receive at least two input informations simultaneously, then the quantity of a plurality of outer signal read lines of this resistive touch screen can be designed at least two input ends, therefore, the quantity of a plurality of independent reading units can be designed at least two independent reading units, and these at least two independent reading units are to couple with these at least two outer signal read lines respectively, and the quantity of a plurality of analog to digital converters can design at least two analog to digital converters, and these at least two analog to digital converter systems couple with at least two independent reading units respectively.
The present invention can be designed and made various corresponding changes and distortion by person skilled in the art scholar, but all is no more than the claimed content of claims.
Claims (13)
1. control circuit that is applicable to touch-screen, wherein this touch-screen has a plurality of outer signal read lines, and this touch-screen synchronously receives a plurality of input informations, and this control circuit comprises:
One multiplexer, input end, a selecting side and an output terminal with a predetermined quantity, and this multiplexer is by receiving those input informations with those outer signal read lines that those input ends correspondingly are connected, and select signal and export a simulating signal according to one, wherein this simulating signal comprises the information of a plurality of outer signal read lines that have been selected;
One analog to digital converter becomes a digital signal by this output terminal of this multiplexer with this analog signal conversion;
One host side is used to produce this selection signal, and carries out a specified handler according to this digital signal; And
One voltage bias controller produces a bias voltage signal that comprises a plurality of bias values according to the control bias voltage signal from this host side.
2. control circuit as claimed in claim 1 wherein should select signal by specifying this multiplexer to set.
3. control circuit as claimed in claim 1, wherein this selecting side of this multiplexer is used to receive this selection signal.
4. control circuit as claimed in claim 1, wherein the input end of this predetermined quantity of this multiplexer for more than, be equal to or less than those outer signal read line quantity of this touch-screen.
5. control circuit that is applicable to touch-screen, wherein this touch-screen has at least two outer signal read lines, and this touch-screen synchronously receives at least two input informations, and this control circuit comprises:
One multiplexer, have at least two input ends, a selecting side and an output terminal, and this multiplexer is by receiving this at least two input informations with these at least two outer signal read lines that these at least two input ends correspondingly are connected, and select signal and export a simulating signal according to one, wherein this simulating signal comprises the information of at least two outer signal read lines that have been selected;
One analog to digital converter becomes a digital signal by this output terminal of this multiplexer with this analog signal conversion;
One host side, wherein this selection signal is to be produced or set by this multiplexer by this host side, and this host side is carried out a specified handler according to this digital signal; And
One voltage bias controller produces a bias voltage signal that comprises a plurality of bias values according to the control bias voltage signal from this host side.
6. control circuit that is applicable to touch-screen, wherein this touch-screen has at least two outer signal read lines, and this touch-screen system synchronously receives at least two input informations, and this control circuit comprises:
At least two independent reading units, couple with these at least two outer signal read lines respectively, and these at least two independent reading units receive this at least two input informations by these at least two outer signal read lines, to produce this at least two simulating signals respectively;
At least two analog to digital converters couple with these two independent reading units respectively at least, and these at least two analog to digital converters are two-digit signal at least with these at least two analog signal conversion;
One host side couples with these two analog to digital converters at least, and according to this at least the two-digit signal carry out a specified handler; And
One voltage bias controller produces a bias voltage signal that comprises a plurality of bias values according to the control bias voltage signal from this host side.
7. control circuit that is applicable to touch-screen, wherein this touch-screen has a plurality of outer signal read lines, and this touch-screen system synchronously receives a plurality of input informations, and this control circuit comprises:
A plurality of independent reading units couple with those outer signal read lines respectively, and those independent reading units receive those input informations by pairing those outer signal read lines, to produce a plurality of simulating signals respectively;
A plurality of analog to digital converters couple with those independent reading units respectively, and those analog to digital converters are a plurality of digital signals with those analog signal conversion;
One host side couples with those analog to digital converters, and carries out a specified handler according to those digital signals; And
One voltage bias controller produces a bias voltage signal that comprises a plurality of bias values according to the control bias voltage signal from this host side.
8. control circuit that is applicable to touch-screen, wherein this touch-screen a plurality of identified regions of having a plurality of outer signal read lines and correspondingly connecting, and those identified regions receive at least one input information, and this control circuit comprises:
One multiplexer, input end, a selecting side and an output terminal with a predetermined quantity, and this multiplexer is by receiving this at least one input information with those outer signal read lines that those input ends correspondingly are connected, and select signal and export a simulating signal according to one, wherein this simulating signal comprises and all has been selected or the information of at least one outer signal read line that has been selected;
One analog to digital converter becomes a digital signal by this output terminal of this multiplexer with this analog signal conversion;
One host side is used to produce this selection signal, and wherein this host side differentiates with decision whether export this digital signal according to a predetermined state that is associated with those identified regions, and carries out a specified handler according to this digital signal; And
One voltage bias controller produces a bias voltage signal that comprises a plurality of bias values according to the control bias voltage signal from this host side.
9. control circuit as claimed in claim 8 wherein should select signal by specifying this multiplexer to set.
10. control circuit as claimed in claim 8, wherein this selecting side of this multiplexer is used to receive this selection signal.
11. control circuit as claimed in claim 8, wherein the input end of this predetermined quantity of this multiplexer for more than, be equal to or less than those outer signal read line quantity of this touch-screen.
12. control circuit as claimed in claim 8, wherein this selection signal designs by a hardware description language program, a high-level language programs or a low-level language program.
13. a control circuit that is applicable to touch-screen, wherein this touch-screen a plurality of identified regions of having a plurality of outer signal read lines and correspondingly connecting, and those identified regions synchronously receive a plurality of input informations, and this control circuit comprises:
A plurality of independent reading units, couple with those outer signal read lines respectively, and after those independent reading units receive those input informations by pairing those outer signal read lines, the correspondingly conversion or not converting analogue signals of each independent reading unit according to a preset state separately;
A plurality of analog to digital converters couple with those independent reading units respectively, and those analog to digital converters are a plurality of digital signals with those analog signal conversion that produced;
One host side couples with those analog to digital converters, and wherein this host side differentiates with decision whether export those digital signals according to a predetermined state that is associated with those identified regions, and carries out a specified handler according to those digital signals; And
One voltage bias controller produces a bias voltage signal that comprises a plurality of bias values according to the control bias voltage signal from this host side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910137503 CN101876862B (en) | 2009-04-28 | 2009-04-28 | Control circuit suitable for touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910137503 CN101876862B (en) | 2009-04-28 | 2009-04-28 | Control circuit suitable for touch screen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101876862A true CN101876862A (en) | 2010-11-03 |
| CN101876862B CN101876862B (en) | 2013-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910137503 Expired - Fee Related CN101876862B (en) | 2009-04-28 | 2009-04-28 | Control circuit suitable for touch screen |
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| Country | Link |
|---|---|
| CN (1) | CN101876862B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103294326A (en) * | 2012-03-02 | 2013-09-11 | 安凯(广州)微电子技术有限公司 | Resistance-type touch screen circuit and two-contact touch application method based on resistance-type touch screen |
| CN104777956A (en) * | 2015-04-14 | 2015-07-15 | 福建联迪商用设备有限公司 | Driving system for four-wire resistance screen |
| CN111999927A (en) * | 2020-09-15 | 2020-11-27 | 业成科技（成都）有限公司 | Electronic handwriting board and handwriting restoration method |
-
2009
- 2009-04-28 CN CN 200910137503 patent/CN101876862B/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103294326A (en) * | 2012-03-02 | 2013-09-11 | 安凯(广州)微电子技术有限公司 | Resistance-type touch screen circuit and two-contact touch application method based on resistance-type touch screen |
| CN104777956A (en) * | 2015-04-14 | 2015-07-15 | 福建联迪商用设备有限公司 | Driving system for four-wire resistance screen |
| CN104777956B (en) * | 2015-04-14 | 2018-05-11 | 福建联迪商用设备有限公司 | A kind of drive system of four-wire resistive screen |
| CN111999927A (en) * | 2020-09-15 | 2020-11-27 | 业成科技（成都）有限公司 | Electronic handwriting board and handwriting restoration method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101876862B (en) | 2013-07-17 |
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