CN105183254A - Touch detection method and apparatus for touch screen and touch screen - Google Patents
Touch detection method and apparatus for touch screen and touch screen Download PDFInfo
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- CN105183254A CN105183254A CN201510509260.6A CN201510509260A CN105183254A CN 105183254 A CN105183254 A CN 105183254A CN 201510509260 A CN201510509260 A CN 201510509260A CN 105183254 A CN105183254 A CN 105183254A
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Abstract
The present invention discloses a touch detection method and apparatus for a touch screen and the touch screen. The apparatus comprises a display panel, a sensing circuit and a control circuit, wherein the sensing circuit comprises at least two sensing loops. The method comprises: performing charging and discharging potential detection on each sensing loop in the sensing circuit at a preset frequency, and acquiring potential values of both ends of each sensing loop; comparing a variation value, when each potential value changes, with a preset threshold, and determining whether an object touches the touch screen; and when the variation value of each potential value exceeds the preset threshold, carrying out calculation to obtain a sensing capacitance value of a sensing capacitance formed between the object and the touch screen when the object touches the touch screen, and a resistance value between the contact point and the sending port in the sensing circuit. According to the touch detection method and apparatus for the touch screen and the touch screen provided by the present invention, the technical problem in the prior art of high manufacturing cost and manufacturing difficulty caused by a large number of sensing loops, sending ports and receiving ports on the touch screen is solved.
Description
Technical field
The present invention relates to touch sensitive screen field, in particular to a kind of touch detecting method of touch control screen, device and touch control screen.
Background technology
At present, in touch pad and touch screen technology, widespread use capacitance touch sensing technology.As shown in Figure 1, Fig. 1 is the schematic diagram of detection scheme in typical capacitance touch sensing technology, and wherein, Txi (i=1...15) is detection signal transmit port, and Rxj (j=1...9) is detection signal receiving port.The cable be connected with transmit port is for send line, and the cable be connected with receiving port, for receive line, sends two plane upward wirings that line is being parallel to each other respectively with reception line.Mutual capacitance is formed in the top-bottom cross face between line and reception line that sends.
When touch pad or touch-screen work, the pumping signal sent from transmit port carries out discharge and recharge to the mutual capacitance that cross facet is formed, and the receiving port be made up of feedback capacity and amplifier exports the current potential be directly proportional to mutual capacitance.Time near finger touch to cross facet, mutual capacitance changes, and is detected by the variable quantity of the current potential be directly proportional to mutual capacitance, can determine whether finger touches.Transmit control device sends pumping signal by the mode scanned in chronological order from different transmit ports, completes full frame scanning, thus realizes the touch detection of microprocessor to finger and the calculating of touch coordinate.
If single sends, receive the time of detection signal is Ts, so, when touch sensitive screen has M transmit port and N number of receiving port, M*Ts is needed to the full frame time of carrying out Scanning Detction; If when the circuit of receiving port is by N number of passage time division multiplex, then full screen scanning testing process needs the time to be M*N*Ts.
By the cabling scheme of above-mentioned touch sensitive screen, there are shortcomings and deficiency:
1. when detecting the touch of finger, need to scan the passage that many are made up of transmit port and multiple receiving interface, because need successively to scan many passages, sweep time will be caused longer, well cannot solve the problem touching and detect by display interference.
2. the port arranged on touch sensitive screen is many, and corresponding passage is also many, and make low to the yield of the high product simultaneously of the manufacture process requirement of touch sensitive screen, manufacturing cost improves thereupon.
3. the transmit port in touch sensitive screen and the numerous pipe leg of touch chip that causes of receiving port numerous, make touch chip entire area large and packaging cost is high, the manufacturing cost of touch chip can be in any more yet.
4. a large amount of pins and passage, limit the feasibility of touch chip and main application processor integrated chip.
For above-mentioned problem, at present effective solution is not yet proposed.
Summary of the invention
Embodiments provide a kind of touch detecting method of touch control screen, device and touch control screen, at least to solve in prior art because of the numerous manufacturing cost that causes of loop inductance, transmit port and receiving port and the high technical matters of manufacture difficulty on touch-screen.
According to an aspect of the embodiment of the present invention, provide a kind of touch control screen, comprising: display panel, sensor circuit and control circuit, control circuit is set up with sensor circuit and is electrically connected, and display panel comprises: viewing area and non-viewing area; Sensor circuit comprises: multiple induction electrode, multiple connecting electrode, transmit port and receiving port; Be laid with at least two loop inductances on a display panel, every bar loop inductance comprises: multiple induction electrode and multiple connecting electrode, each induction electrode is connected in series with the electrode connection mode preset, and the connecting electrode by being arranged at the non-viewing area of display panel between induction electrode connects, wherein, loop inductance is electrically connected with control circuit by corresponding transmit port and receiving port; Wherein, induction electrode is arranged in the first side and/or second side of the viewing area of display panel in mode arranged in parallel.
According to the another aspect of the embodiment of the present invention, additionally provide a kind of touch detecting method of touch control screen, comprise: display panel, sensor circuit and control circuit, wherein, sensor circuit at least comprises two loop inductances, method comprises: carry out charge and discharge potential detection with predeterminated frequency to the loop inductance in sensor circuit, obtains the potential value at loop inductance two ends; Compare with the threshold value preset according to the changing value that potential value changes, judged whether object contact touch control screen; When the changing value of potential value exceedes the threshold value pre-set, calculate the induced electricity capacitance of the inductance capacitance that object is formed when contacting touch control screen and between touch control screen, and the resistance value between transmit port in sensor circuit to contact point, wherein, contact point is for characterizing position during object contact touch control screen; According to resistance value and induced electricity capacitance, calculate the relative coordinate of contact point on touch control screen.
According to the another aspect of the embodiment of the present invention, additionally provide a kind of touch detecting apparatus of touch control screen, comprise: display panel, sensor circuit and control circuit, wherein, sensor circuit at least comprises two loop inductances, device comprises: acquisition module, for carrying out charge and discharge potential detection with predeterminated frequency to the loop inductance in sensor circuit, obtains the potential value at loop inductance two ends; Comparing module, compares with the threshold value preset for the changing value changed according to potential value, has judged whether object contact touch control screen; First processing module, when the changing value of potential value exceedes the threshold value pre-set, for calculating the induced electricity capacitance of the inductance capacitance that object is formed when contacting touch control screen and between touch control screen, and the resistance value between transmit port in sensor circuit to contact point, wherein, contact point is for characterizing position during object contact touch control screen; Second processing module, for according to resistance value and induced electricity capacitance, calculates the relative coordinate of contact point on touch control screen.
In embodiments of the present invention, adopt display panel, sensor circuit and control circuit, wherein, sensor circuit at least comprises two loop inductances, method comprises: carry out charge and discharge potential detection with predeterminated frequency to the loop inductance in sensor circuit, obtains the potential value at loop inductance two ends; Compare with the threshold value preset according to the changing value that potential value changes, judged whether object contact touch control screen; When the changing value of potential value exceedes the threshold value pre-set, calculate the induced electricity capacitance of the inductance capacitance that object is formed when contacting touch control screen and between touch control screen, and the resistance value between transmit port in sensor circuit to contact point, wherein, contact point is for characterizing position during object contact touch control screen; According to resistance value and induced electricity capacitance, calculate the mode of the relative coordinate of contact point on touch control screen, by display panel, sensor circuit and control circuit, wherein, sensor circuit at least comprises two loop inductances, device comprises: acquisition module, for carrying out charge and discharge potential detection with predeterminated frequency to the loop inductance in sensor circuit, obtains the potential value at loop inductance two ends; Comparing module, compares with the threshold value preset for the changing value changed according to potential value, has judged whether object contact touch control screen; First processing module, when the changing value of potential value exceedes the threshold value pre-set, for calculating the induced electricity capacitance of the inductance capacitance that object is formed when contacting touch control screen and between touch control screen, and the resistance value between transmit port in sensor circuit to contact point, wherein, contact point is for characterizing position during object contact touch control screen; Second processing module, for according to resistance value and induced electricity capacitance, calculate the relative coordinate of contact point on touch control screen, reach the object of the production difficulty reducing touch control screen, thus achieve reduction process complexity, the technique effect of speed up processing, and then solve in prior art because of the numerous manufacturing cost that causes of loop inductance, transmit port and receiving port and the high technical matters of manufacture difficulty on touch-screen.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of detection scheme in a kind of typical capacitance touch sensing technology according to prior art;
Fig. 2 is the wiring diagram of a kind of optional touch control screen according to the embodiment of the present invention;
Fig. 3 is the wiring diagram of a kind of optional touch control screen according to the embodiment of the present invention;
Fig. 4 is the equivalent-circuit model of the touch control screen according to the embodiment of the present invention;
Fig. 5 is the wiring diagram of a kind of optional touch control screen according to the embodiment of the present invention;
Fig. 6 is the process flow diagram of the touch detecting method of a kind of touch control screen according to the embodiment of the present invention;
Fig. 7 is the finger touch coordinate model schematic diagram of the touch control screen according to the embodiment of the present invention;
Fig. 8 is the charge and discharge process simulation waveform schematic diagram of the loop inductance of touch control screen according to the embodiment of the present invention;
Fig. 9 is the charge and discharge process simulation waveform schematic diagram of the loop inductance of touch control screen according to the embodiment of the present invention;
Figure 10 is the structured flowchart of the touch detecting apparatus of a kind of touch control screen according to the embodiment of the present invention; And
Figure 11 is the structured flowchart of the touch detecting apparatus of a kind of optional touch control screen according to the embodiment of the present invention.
Embodiment
The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
It should be noted that, term " first ", " second " etc. in instructions of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged in the appropriate case, so as embodiments of the invention described herein can with except here diagram or describe those except order implement.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
According to the embodiment of the present invention, provide a kind of touch control screen, Fig. 2 and Fig. 3 is the wiring diagram of the touch control screen according to the embodiment of the present invention, and as shown in Figures 2 and 3, this touch control screen comprises:
Display panel 10, sensor circuit 20 and control circuit 30, control circuit 30 is set up with sensor circuit 20 and is electrically connected, and display panel 10 comprises: viewing area 101 and non-viewing area 102; Sensor circuit 20 comprises: multiple induction electrode 201, multiple connecting electrode 202, transmit port 203 and receiving port 204; Display panel 10 is laid with at least two loop inductances, every bar loop inductance comprises: multiple induction electrode 201 and multiple connecting electrode 202, each induction electrode 201 is connected in series with the electrode connection mode preset, and connected by the connecting electrode 202 of the non-viewing area 102 being arranged at display panel 10 between induction electrode 201, wherein, loop inductance is electrically connected with control circuit 30 by corresponding transmit port 203 and receiving port 204;
Wherein, induction electrode 201 is arranged in the first side and/or second side of the viewing area 101 of display panel 10 in mode arranged in parallel.
Concrete, in above-mentioned touch control screen, minimum need arrange two loop inductances be made up of ITO indium tin oxide, and arrange 2 ports for every bar loop inductance, can realize the function detected touch signal.Wherein, the induction electrode in loop inductance can use other transparent or semitransparent material.When needs realize multi-touch function on touch-screen, after to display panel zoning, wiring can be carried out on a display panel in each region in the above described manner to realize multi-touch function.
Fig. 4 is the equivalent-circuit model of above-mentioned touch control screen, comprises two loop inductances, is respectively loop A and loop B.Wherein, loop A transmit port Aa to touch point line resistance for R1, loop A receiving port Ab to touch point line resistance be R2.The transmit port Ba of loop B to the line resistance of the touch point receiving port Bb that is R3, loop B to the line resistance of touch point be R4.The electric capacity formed between loop A and finger contact point when Cf1 is finger touch, the electric capacity formed between loop B and finger contact point when Cf2 is finger touch, Ch is the electric capacity that human body arrives the earth, and Cg is the electric capacity between the earth and screen detection signal ground.C1, C2, C3 and C4 are respectively port Aa, Ab, Ba and Bb coupling capacitance over the ground, and loop A is connected to control circuit by transmit port Aa and receiving port Ab, loop B by transmit port Ba and receiving port Bb.In its charge and discharge transmitting-receiving process, transmit port Aa and transmit port Ba can send simultaneously, and receiving port Ab and receiving port Bb also can receive simultaneously.
As a kind of optional embodiment, in the viewing area 101 on display panel 10, comprise n bar induction electrode 201.
Concrete, the quantity n of induction electrode can according to the size of screen, and determine to draw to the accuracy of detection of touching signals.Such as: screen body is wide is W1, and height is H1.Wherein, visible area field width is W, high H.The center distance of adjacent induction electrode is for finger Maximum Contact face is directly through d.Therefore, the quantity n=W/d of n bar induction electrode is comprised in viewing area.
As a kind of optional embodiment, as shown in Figure 2, when induction electrode 201 to be arranged in the first side and second side of the viewing area 101 on display panel 10 with parallel arrangement mode, electrode connection mode is: connect the adjacent induction electrode 201 in display panel 10 phase the same side by wire jumper with the form of series connection, form at least two loop inductances.
Concrete, induction electrode according to any direction, can be arranged in the positive and negative both sides of the viewing area on display panel with parallel arrangement mode.The mode of wire jumper or two-sided silver slurry line can be utilized, by the head end of the head end of the first induction electrode with the second induction electrode be adjacent is connected, by the mode that the tail end of the second induction electrode is connected with the tail end of the 3rd induction electrode be adjacent, induction electrode on display panel homonymy is connected, forms at least two loop inductances.Certainly, other forms of connecting electrode can also be utilized, induction electrode is connected, not repeat herein.
As a kind of optional embodiment, multiple first induction electrode 201 of the first side is arranged in the viewing area 101 of display panel 10 with multiple second induction electrodes 201 of the second side with monospacing, parallel arrangement mode, multiple first induction electrode 201 and multiple second induction electrode 201 are paliform on display panel 10, wherein, by multiple first connecting electrodes 202 of the first side of display panel 10, connect adjacent multiple first induction electrodes 201 in the mode of series connection, form at least one the first loop inductances; By multiple second connecting electrodes 202 of the second side of display panel 10, connect adjacent multiple second induction electrodes 201 in the mode of connecting, form at least one the second loop inductances.
Concrete, in the viewing area of display panel, the first induction electrode of the first side and the second induction electrode of the second side with the arrangement mode of wide-space, the both sides with display panel arranged in parallel.Further, need the first induction electrode of the first side and the induction electrode of the second side are staggered, by the first induction electrode of the first side, be laid on the first side of the display panel relative with two of the second side the second induction electrode centre positions.
As a kind of optional embodiment, comprise i bar first induction electrode 201 in the viewing area 101 of the first side of display panel 10, comprise j bar second induction electrode 201 in the viewing area 101 of the second side of display panel 10, wherein, i and j sum equals n.
As a kind of optional embodiment, as shown in Figure 3, when induction electrode 201 to be arranged in the first side or second side of the viewing area 101 on display panel 10 with parallel arrangement mode, electrode connection mode is: connect alternate induction electrode 201 by connecting electrode 202 with the form of series connection, form at least two loop inductances.
Concrete, induction electrode according to any direction, can be arranged in any one side in the pro and con of the viewing area on display panel with parallel arrangement mode.In order to prevent the interference between the connecting electrode of the same side, via hole can be set by the non-viewing area at display panel, and utilize two-sided silver slurry line and via hole, are connected by connecting electrode in the both sides of alternate induction electrode at display panel, form two loop inductances.Certainly, induction electrode, except utilizing except two-sided silver slurry line this connecting electrode connects, can also use other modes that can realize above-mentioned functions to connect, not repeat herein.
As a kind of optional embodiment, as shown in Figure 5, m bar auxiliary induction electrode 205 is also comprised in the viewing area 101 of display panel 10, m is the integral multiple of n, wherein, auxiliary induction electrode 205 is arranged at the one or both sides of induction electrode, is connected by auxiliary induction electrode 205, form at least two auxiliary induction loops with the auxiliary electrode connected mode preset.
Concrete, by arranging auxiliary induction electrode in the side of induction electrode or both sides, and by auxiliary connecting electrode, auxiliary induction electrode being connected, forming auxiliary induction loop.Auxiliary induction loop can utilize the algorithm identical with loop inductance to process touch signal.Jointly touch signal is detected by auxiliary induction loop and loop inductance, the accuracy rate obtaining the touch signal that finger touch screen produces can be improved.
As a kind of optional embodiment, between induction electrode 201, can shielding wire be set, the mutual interference between induction electrode 201 can be avoided by shielding wire, to improve the accuracy rate obtaining the touch signal that finger touch screen produces.
As a kind of optional embodiment, the induction electrode 201 in sensor circuit 20 and/or connecting electrode 202 adopt indium-tin oxide electrode.
In the middle of practical application, the electrode that the induction electrode in sensor circuit and/or connecting electrode adopt, except adopting indium-tin oxide electrode, can also adopt other transparency electrodes or semitransparent electrode, not enumerate herein.
As a kind of optional embodiment, sensor circuit 20 also comprises: substrate 205, and substrate 205 is arranged at the display side of display panel 1010, and loop inductance 20 is laid on substrate 205;
Wherein, induction electrode 201 is arranged in the first side and/or second side of the first area of substrate 205 in mode arranged in parallel, and the connecting electrode 202 by being arranged at the second area of substrate 205 between induction electrode 201 connects, first area is region corresponding with the viewing area 101 of display panel 10 on substrate 205, and second area is region corresponding with the non-viewing area 102 of display panel 10 on substrate 205.
Concrete, one can be arranged separately for laying the substrate of loop inductance in sensor circuit, by the sensor circuit that will be originally laid on display panel, be arranged on substrate, the manufacture difficulty of touch-screen can be reduced, prevent loop inductance to be subject to the problem of the impact of display panel.Wherein, the method that substrate is laid loop inductance is substantially identical with the method laying loop inductance on a display panel, does not repeat herein.
As a kind of optional embodiment, the substrate in sensor circuit 20 is the electrically-conductive backing plate with conductive layer, and induction electrode 201 and/or connecting electrode 202 are etched on electrically-conductive backing plate.
According to the embodiment of the present invention, provide a kind of embodiment of the method for touch detecting method of touch control screen, it should be noted that, can perform in the computer system of such as one group of computer executable instructions in the step shown in the process flow diagram of accompanying drawing, and, although show logical order in flow charts, in some cases, can be different from the step shown or described by order execution herein.
Fig. 6 is the process flow diagram of the touch detecting method of a kind of touch control screen according to the embodiment of the present invention, and wherein, touch control screen comprises: display panel, sensor circuit and control circuit, wherein, sensor circuit at least comprises two loop inductances, and as shown in Figure 6, the method comprises the steps:
Step S102, carries out charge and discharge potential detection with predeterminated frequency to the loop inductance in sensor circuit, obtains the potential value at loop inductance two ends.
Concrete, by step S102, control circuit, with the fixed frequency pre-set, is charged to loop inductance by transmit port, is discharged to loop inductance by receiving port.And to loop inductance in charge and discharge process, the potential value at loop inductance two ends obtains.
Step S104, compares with the threshold value preset according to the changing value that potential value changes, has judged whether object contact touch control screen.
Concrete, by step S104, when carrying out discharge and recharge with predeterminated frequency to loop inductance, when control circuit detects that the potential value at loop inductance two ends changes, obtain the changing value between potential value and reference potential value real-time monitored.After changing value and the threshold value pre-set being compared, determine whether touch control screen has object touch-screen contact.
Step S106, when the changing value of potential value exceedes the threshold value pre-set, calculate the induced electricity capacitance of the inductance capacitance that object is formed when contacting touch control screen and between touch control screen, and the resistance value between transmit port in sensor circuit to contact point, wherein, contact point is for characterizing position during object contact touch control screen.
Concrete, when defining object contact touch control screen, object is calculated when contacting touch control screen, the induced electricity capacitance of the inductance capacitance formed between object and touch control screen by step S106, and the resistance value of this section of loop inductance between transmit port to contact point.
Step S108, according to resistance value and induced electricity capacitance, calculates the relative coordinate of contact point on touch control screen.
Concrete, be described in conjunction with practical application.Fig. 4 is the equivalent-circuit model of above-mentioned touch control screen, and composition graphs 4 is described.Comprising two loop inductances, be respectively loop A and loop B.Wherein, loop A transmit port Aa to touch point line resistance for R1, loop A receiving port Ab to touch point line resistance be R2.The transmit port Ba of loop B to the line resistance of the touch point receiving port Bb that is R3, loop B to the line resistance of touch point be R4.The electric capacity formed between loop A and finger contact point when Cf1 is finger touch, the electric capacity formed between loop B and finger contact point when Cf2 is finger touch, Cb is the electric capacity that human body arrives the earth, and Cg is the electric capacity between the earth and screen detection signal ground.C1, C2, C3 and C4 are respectively port Aa, Ab, Ba and Bb coupling capacitance over the ground, and loop A is connected to control circuit by transmit port Aa and receiving port Ab, loop B by transmit port Ba and receiving port Bb.In its charge and discharge transmitting-receiving process, transmit port Aa and transmit port Ba can send simultaneously, and receiving port Ab and receiving port Bb also can receive simultaneously.
Concrete charge and discharge transmitting-receiving process, is described for transmit port Aa:
When without finger touch screen, control circuit is only charged to fixing charging potential Vbn to port electric capacity C1, by receiving port Ab receiving test circuit output potential V1 by transmit port Aa.
When there being finger touch screen, control circuit passes through transmit port Aa to port electric capacity C1, and charges to the loop inductance that Cf1, Ch, Cg form via R1.Because Ch, Cg are much larger than Cf1, the total capacitance C ≈ Cf1 therefore in serial loop, the linearity range charging potential of Va point is:
Va＝(ε*t)/(R1*C)＝(ε*t)/(R1*Cf1)；
Wherein, ε is constant, and t is the duration of charging.
Disconnecting charging source when being charged to time T, stopping being charged to loop inductance A by transmit port Aa, at this moment V1=Vb1, Va=(ε * T)/(R1*Cf1).
Because C1 is much smaller than Cf1, the current potential V1 of transmit port Aa is down to very soon and maintains an equal level with Va, so the current potential of V1 in loop inductance A is:
V1＝Va＝(ε*T)/(R1*Cf1)；
Meanwhile, the current potential V3 of the transmit port Ba of sensor circuit B exports and is:
V3＝(ε*T)/(R3*Cf2)；
In like manner, current potential V2 and V3 of two-port Ab and Bb is respectively in addition:
V2＝(ε*T)/(R2*Cf1)；
V4＝(ε*T)/(R4*Cf2)；
When control circuit detects the current potential Vn of any one port and the difference (Vbn-Vn) of reference potential Vbn is greater than the threshold value of setting, just show there is finger touch screen, wherein, n is one of in 1 to 4.
When finger touch screen having been detected by said method, concrete touch location resistance capacitance computation process has been:
In loop inductance A, R1+R2=R0; R2=R0-R1; Wherein, R0 is the all-in resistance of loop inductance A.In like manner, in loop inductance B, R3+R4=R0, R4=R0-R3.The all-in resistance of loop inductance B is R0.
Have the potential calculation formula of above-mentioned port known:
V1/V2＝R2/R1＝(R0-R1)/R1；
So, R1=(R0*V2)/(V1+V2).
In like manner known:
V3/V4＝R4/R3＝(R0-R3)/R3，
So, R3=(R0*V4)/(V3+V4).
Obtained by the computing formula of V1 and the computing formula of R1: V1/V3=(R3*Cf2)/(R1*Cf1),
So, Cf1/Cf2=(V3/V1) * (R3/R1).
Comprehensive above-mentioned formula is known:
Cf1/Cf2＝(V3*V4*(V1+V2))/(V1*V2*(V3+V4))。
By the above-mentioned resistance capacitance calculated, as follows with the position relationship computation process of contact point:
As shown in Figures 2 and 3, can be Ru at the resistance of the unit length of setting loop inductance, the resistance of loop inductance be directly proportional to its length.Such as, in loop inductance A, in loop inductance, Ae section is the two-port of loop inductance, and the electrode length of each port is 5 unit lengths, so resistance is Rae=5*Ru.In loop inductance, Am section is for being connected in series each bar induction electrode connecting electrode.The length of every bar connecting electrode is 3 unit lengths, so the resistance of connecting electrode is Ram=3*Ru.A1 section in loop inductance, A2 section, A3 section, A4 section, A5 section, A6 section are respectively the induction electrode of parallel arrangement, and the length of every strip electrode is 18 unit lengths, so the resistance of every bar induction electrode is Rak=18*Ru (k=1...6).
In like manner known, in loop inductance B, the Be section in loop inductance is the two-port of loop inductance, and the electrode length of each port is 5, so resistance is.In loop inductance, Bm section is for being connected in series each bar induction electrode connecting electrode.The length of every bar connecting electrode is 3, so the resistance of connecting electrode is Ram=3*Ru.B1 section in loop inductance, B2 section, B3 section, B4 section, B5 section, B6 section are respectively the induction electrode of parallel arrangement, and the length of every strip electrode is 18, so the resistance of every bar induction electrode is Rak=18*Ru (k=1...6).
Wherein, the length of loop inductance A and loop inductance B is equal, and therefore all-in resistance is also equal, is:
R0＝2*Rae+5*Ram+6*Rai＝10Ru+15Ru+108Ru＝133*Ru；
It can thus be appreciated that,
R1＝(R0*V2)/(V1+V2)＝(133*Ru*V2)/(V1+V2)；
R3＝(R0*V4)/(V3+V4)＝(133*Ru*V4)/(V3+V4)。
Wherein, when loop inductance A and loop inductance B is arranged at the positive and negative both sides of display panel or substrate, as shown in Figure 2, when finger and the touch point of touch control screen, be the position of Sa in the length of loop inductance A middle distance Aa, then:
R1=Sa*Ru, therefore:
Sa*Ru＝(133*Ru*V2)/(V1+V2)；
Sa＝(133*V2)/(V1+V2)。
When finger and the touch point of touch control screen, be the position of Sa in the length of loop inductance B middle distance Aa, then:
Sb＝(133*V4)/(V3+V4)。
When loop inductance A and loop inductance B is arranged at the homonymy of display panel or substrate, as shown in Figure 3, when finger and the touch point of touch control screen, be the position of Sa in the length of loop inductance A middle distance Aa, then:,
R1＝(R0*V2)/(V1+V2)＝(108*Ru*V2)/(V1+V2)；
R3＝(R0*V4)/(V3+V4)＝(108*Ru*V4)/(V3+V4)；
Sa＝(108*V2)/(V1+V2)。
When finger and the touch point of touch control screen, be the position of Sa in the length of loop inductance B middle distance Aa, then:
Sb＝(108*V4)/(V3+V4)。
By step S102 to step S108, according to the potential change detected in loop inductance, judge whether object contact touch control screen.In time defining object contact touch control screen, according to the resistance value got from loop inductance and induced electricity capacitance, by calculating the contact point coordinate confirming object contact Touch Screen.Thus achieve only two loop inductances need be set in touch control screen, the technique effect of the contact point of object contact touch control screen can be determined, thus reach the object of the production difficulty reducing touch control screen, thus reach reduction process complexity, the technique effect of speed up processing, thus reach the object promoting the recognition speed to sliding trace under the prerequisite not promoting hardware performance, and then solve in prior art because of loop inductance on touch-screen, transmit port and receiving port numerous, the manufacturing cost caused and the high technical matters of manufacture difficulty.
In the middle of practical application, traditional touch control screen because of loop inductance, transmit port and receiving port numerous, the stitch corresponding with it is also numerous, encapsulation link need to weld each stitch successively.Therefore, result in process of production, the yields of existence and the low problem of production efficiency, finally make production cost can not be in any more.And by the method in the embodiment of the present application, because improving the arrangement mode of loop inductance, the quantity of loop inductance is greatly reduced, and, make the minimizing that the quantity of transmit port corresponding to it and receiving port is also all corresponding.Thus yields and the production efficiency of product can be improve.
As a kind of optional embodiment, carry out charge and discharge potential detection in step S102 with predeterminated frequency to the loop inductance in sensor circuit, before obtaining the potential value at loop inductance two ends, method can also comprise:
Step S11, when not having object contact touch control screen, the port electric capacity of transmit port will be connected with loop inductance one end by the charging circuit of control circuit, charges to the set potential pre-set.
Step S13, by the receiving test circuit of control circuit, detects the potential value of the receiving port be connected with the loop inductance other end as reference potential value.
Concrete, by step S11 to step S13 when there is no object contact touch control screen, initial work is carried out to loop inductance.First, charged by the port electric capacity of the charging circuit in control circuit to the transmit port of loop inductance, the set potential extremely default by the port capacitor charging of transmit port, then, then detects the potential value of receiving port by the receiving test circuit in control circuit.By the potential value now detected, as reference potential value.
In the middle of practical application, if when above-mentioned touch control screen is applied to mobile terminal, can when each mobile terminal starts, the reference potential value of touch control screen is obtained, thus the error because circuit oxidation or dirt erosion make the resistance value of loop inductance change and cause can be avoided.
As a kind of optional embodiment, step S104 compares according to the changing value of potential value and the threshold value preset, and has judged whether object contact touch control screen, having comprised:
Step S41, when by charging circuit to the port capacitor charging of the transmit port of loop inductance to set potential time, by the real-time potential value of receiving test circuit determination receiving port.
Step S43, when the difference of reference potential value and real-time potential value is greater than predetermined threshold value, defines object contact touch control screen.
Concrete, by step S41 to step S43, by carrying out charge and discharge potential detection with the frequency preset to loop inductance, namely charge with the transmit port of frequency to loop inductance preset, after the port capacitor charging of transmit port to the set potential preset, obtained the real-time potential value of receiving port by receiving test circuit.By the difference of reference potential value and real-time potential value, compare with predetermined threshold value.Compared by the difference of reference potential value and real-time potential value and predetermined threshold value, determined whether that object contact touch judges.
As a kind of optional embodiment, step S106 calculates the induced electricity capacitance of inductance capacitance that object is formed when contacting touch control screen and between touch control screen, and the resistance value between transmit port in sensor circuit to contact point, comprising:
Step S61, obtains the total resistance value of loop inductance.
Step S63, according to real-time potential value and total resistance value, calculates the resistance value determined between transmit port to contact point.
Step S65, according to resistance value and real-time potential value, calculates the induced electricity capacitance determining the inductance capacitance that object is formed when contacting touch control screen and between touch control screen.
Concrete, by step S61 to step S65, first obtain the total resistance value of loop inductance, wherein, total resistance value can obtain by reading the resistance value of demarcating in advance be stored in storer, also can when initialization touch-screen, by calculating, do not repeat herein.After getting the total resistance value of loop inductance, according to real-time potential value and total resistance value, calculate the resistance value of the loop inductance between transmit port to contact point.Last according to resistance value and real-time potential value, calculate and determine when contacting touch control screen, the induced electricity capacitance of the inductance capacitance formed between object and touch control screen.
As a kind of optional embodiment, step S108, according to resistance value and induced electricity capacitance, calculates the relative coordinate of contact point on touch control screen, comprising:
Step S81, according to the ratio of resistance value and total resistance value, calculates the relative position of contact point in loop inductance.
Step S83, according to induced electricity capacitance, calculates and determines the contact area of object at the contact point of contact touch control screen.
Step S85, according to relative position and contact area, in conjunction with the arranging rule of loop inductance on touch control screen, determines the relative coordinate of contact point center in touch control screen.
Concrete, by step S81 to step S85 according to the ratio between resistance value and total resistance value, the relative position of contact point in loop inductance can be calculated.Because of contact area and the proportional relation of induced electricity capacitance of object contact touch control screen, so according to induced electricity capacitance, the contact area of object at the contact point of contact touch control screen can be calculated.According to the above-mentioned relative position that calculates and contact area, and the bat of the loop inductance of combination of touch control formula screen is irregular, can determine the relative coordinate at the center of object and touch control screen contact point.
In the middle of practical application, composition graphs 7 is described, and Fig. 7 is the finger touch coordinate model schematic diagram of touch control screen, and under normal circumstances, finger fingertip is when contacting contact screen because being subject to the effect of power, and surface of contact is rounded.As shown in Figure 7, the contact point of circle is divided into two parts in left and right.Width is that the left-half of D1 overlaps with loop inductance A, and width is that the right half part of D2 overlaps with loop inductance B.Within the scope of relative efficiency precision controlling, for convenience of engineering calculation, the left-half of surface of contact and the right half part of surface of contact are done square equivalent process.The area of D1 is the area of D*D1, D2 is D*D2, and wherein, D is about 1 unit length for finger diameter.Because electric capacity is directly proportional to area, so:
Cf1/Cf2＝D1/D2＝(D-D2)/D2＝(1-D2)/D2；
Therefore: (1-D2)/D2=((V3*V4* (V1+V2))/(V1*V2* (V3+V4));
Thus obtain:
D2＝(V1*V2*(V3+V4))/(V3*V4*(V1+V2)+V1*V2*(V3+V4))。
Because the length of Ae section is Se=5, A1 section, the length of A2 section, A3 section, A4 section, A5 section, A6 section is Si=18 (i=1...6), Am length is Sm=3.
When loop inductance A and loop inductance B is arranged at the positive and negative both sides of display panel or substrate, if the finger centre point coordinate of loop inductance A is (Xa, Ya), the sectional area coordinate of inductive reactance A is designated as Za.If the finger centre point coordinate of loop inductance B is (Xb, Yb), the sectional area coordinate of inductive reactance B is designated as Zb.If the coordinate that departs between finger centre point and the central point of contact segment loop inductance A and loop inductance B is Xd, then finger centre point coordinate (X, Y) can be calculated by following segmentation:
If D2 < 1/2*D=0.5, then Xd=0.5-D2, otherwise Xd=D2-0.5.
Have loop inductance A:
If Sa < Se=5, then Ya=0; Za=1;
Sa < Se+1*Si, then Ya=Sa-Se else if; Za=1;
Sa < Se+1*Si+0.5*Sm, then Ya=Si else if; Za=1;
Sa < Se+1*Si+1*Sm, then Ya=Si else if; Za=2;
Sa < Se+2*Si+1*Sm, then Ya=2*Si-Sa+Se+1*Sm else if; Za=2;
Sa < Se+2*Si+1.5*Sm, then Ya=0 else if; Za=2;
Sa < Se+2*Si+2*Sm, then Ya=0 else if; Za=3;
Sa < Se+3*Si+2*Sm, then Ya=Sa-Se-2*Sm-2*Si else if; Za=3;
Sa < Se+3*Si+2.5*Sm, then Ya=Si else if; Za=3;
Sa < Se+3*Si+3*Sm, then Ya=Si else if; Za=4;
Sa < Se+4*Si+3*Sm, then Ya=4*Si-Sa+Se+3*Sm else if; Za=4;
Sa < Se+4*Si+3.5*Sm, then Ya=0 else if; Za=4;
Sa < Se+4*Si+4*Sm, then Ya=0 else if; Za=5;
Sa < Se+5*Si+4*Sm, then Ya=Sa-Se-4*Sm-4*Si else if; Za=5;
Sa < Se+5*Si+4.5*Sm, then Ya=Si else if; Za=5;
Sa < Se+5*Si+5*Sm, then Ya=Si else if; Za=6;
Sa < Se+6*Si+5*Sm, then Ya=6*Si-Sa+Se+5*Sm else if; Za=6;
Otherwise Ya=0; Za=6.
In like manner, Yb and Zb is tried to achieve to loop inductance B, calculate finger centre point coordinate Y=(Ya+Yb)/2.
If Za=Zb, then finger centre point coordinate X=Za+Xd, otherwise finger centre point coordinate X=Za-Xd is finally mapped to (W, H) coordinate (x, y) is then:
x＝W*X/12，y＝H*Y/18。
When loop inductance A and loop inductance B is arranged at the homonymy of display panel or substrate, finger centre point coordinate (X, Y) segmentation is calculated and is adjusted to:
If D2 < 1/2*D=0.5, then Xd=0.5-D2, otherwise Xd=D2-0.5.
Have loop inductance A:
If Sa < 1*Si, then Ya=Sa; Za=1;
Sa < 2*Si, then Ya=2*Si-Sa else if; Za=2;
Sa < 3*Si, then Ya=Sa-2*Si else if; Za=3;
Sa < 4*Si, then Ya=4*Si-Sa else if; Za=4;
Sa < 5*Si, then Ya=Sa-4*Si else if; Za=5;
Sa < 6*Si, then Ya=6*Si-Sa else if; Za=6;
Otherwise Ya=0; Za=6;
In like manner, Yb and Zb is tried to achieve to loop inductance B adjustment, calculates finger centre point coordinate Y=(Ya+Yb)/2.
If Za=Zb, then finger centre point coordinate X=Za+Xd, otherwise finger centre point coordinate X=Za-Xd,
Finally being mapped to (W, H) coordinate (x, y) is then: x=W*X/12, y=H*Y/18.
In actual applications, emulation test is carried out to such scheme, wherein:
1., when fixing touch electric capacity, the gamut charge and discharge process simulation waveform of the different resistance of the different touch points performance on above-mentioned touch control screen as shown in Figure 8.Wherein, the current potential that wavy line L1 is resistance when being 10K exports; The current potential that wavy line L2 is resistance when being 20K exports; The current potential that wavy line L3 is resistance when being 30K exports; The current potential that wavy line L4 is resistance when being 40K exports; The current potential that wavy line L5 is resistance when being 50K exports.Result shows, when the increment of every 10k resistance changes, when duration of charging T is near 0.75us, its charging potential has more stable current potential increment.
2., under fixing touch point, charge and discharge process simulation waveform when the horizontal unrestrained different electric capacity moving performance of touch of finger change on two lines as shown in Figure 9.Wherein, the current potential that wavy line L10 is electric capacity when being 1pf exports; The current potential that wavy line L11 is electric capacity when being 1.5pf exports; The current potential that wavy line L12 is electric capacity when being 2.5pf exports; The current potential that wavy line L13 is electric capacity when being 4pf exports; The current potential that wavy line L14 is electric capacity when being 6pf exports; The current potential that wavy line L15 is electric capacity when being 8.5pf exports.Result shows, when the increment of every 0.5pf electric capacity changes, when duration of charging T is near 0.75us, its charging potential has more stable current potential increment.
3., detecting current potential with on the basis of resistance and electric capacity linear change, effectively can guarantee the detection linear precision of touch point coordinate.
According to the embodiment of the present invention, additionally provide a kind of touch detecting apparatus of touch control screen, as shown in Figure 10, touch control screen comprises: display panel, sensor circuit and control circuit, wherein, sensor circuit at least comprises two loop inductances, and device comprises: acquisition module 32, comparing module 34, first processing module 36 and the second processing module 38.
Wherein, acquisition module 32, for carrying out charge and discharge potential detection with predeterminated frequency to the loop inductance in sensor circuit, obtains the potential value at loop inductance two ends; Comparing module 34, compares with the threshold value preset for the changing value changed according to potential value, has judged whether object contact touch control screen; First processing module 36, when the changing value of potential value exceedes the threshold value pre-set, for calculating the induced electricity capacitance of the inductance capacitance that object is formed when contacting touch control screen and between touch control screen, and the resistance value between transmit port in sensor circuit to contact point, wherein, contact point is for characterizing position during object contact touch control screen; Second processing module 38, for according to resistance value and induced electricity capacitance, calculates the relative coordinate of contact point on touch control screen.
By above-mentioned acquisition module 32, comparing module 34, first processing module 36 and the second processing module 38, according to the potential change detected in loop inductance, judge whether object contact touch control screen.In time defining object contact touch control screen, according to the resistance value got from loop inductance and induced electricity capacitance, by calculating the contact point coordinate confirming object contact Touch Screen.Thus achieve only two loop inductances need be set in touch control screen, the technique effect of the contact point of object contact touch control screen can be determined, thus reach the object of the production difficulty reducing touch control screen, thus reach reduction process complexity, the technique effect of speed up processing, thus reach the object promoting the recognition speed to sliding trace under the prerequisite not promoting hardware performance, and then solve in prior art because of loop inductance on touch-screen, transmit port and receiving port numerous, the manufacturing cost caused and the high technical matters of manufacture difficulty.
As a kind of optional embodiment, as shown in figure 11, said apparatus also comprises: charging module 30 and detection module 31.
Wherein, charging module 30, for when not having object contact touch control screen, the port electric capacity of transmit port will be connected with loop inductance one end by the charging circuit of control circuit, charges to the set potential pre-set; Detection module 31, for the receiving test circuit by control circuit, detects the potential value of the receiving port be connected with the loop inductance other end as reference potential value.
Concrete, by above-mentioned charging module 30 and detection module 31 when there is no object contact touch control screen, initial work is carried out to loop inductance.First, charged by the port electric capacity of the charging circuit in control circuit to the transmit port of loop inductance, the set potential extremely default by the port capacitor charging of transmit port, then, then detects the potential value of receiving port by the receiving test circuit in control circuit.By the potential value now detected, as reference potential value.
As a kind of optional embodiment, above-mentioned comparing module 34 comprises: sub-detection module 341 and the first sub-determination module 343.
Wherein, sub-detection module 341, for when by charging circuit to the port capacitor charging of the transmit port of loop inductance to set potential time, by the real-time potential value of receiving test circuit determination receiving port; First sub-determination module 343, for when the difference of reference potential value and real-time potential value is greater than predetermined threshold value, defines object contact touch control screen.
Concrete, by above-mentioned sub-detection module 341 and the first sub-determination module 343, with the frequency preset, charge and discharge potential detection is carried out to loop inductance, namely charge with the transmit port of frequency to loop inductance preset, after the port capacitor charging of transmit port to the set potential preset, obtained the real-time potential value of receiving port by receiving test circuit.By the difference of reference potential value and real-time potential value, compare with predetermined threshold value.Compared by the difference of reference potential value and real-time potential value and predetermined threshold value, determined whether that object contact touch judges.
As a kind of optional embodiment, above-mentioned first processing module 36 comprises: sub-acquisition module 361, first sub-processing module 363 and the second sub-processing module 365.
Wherein, sub-acquisition module 361, for obtaining the total resistance value of loop inductance; First sub-processing module 363, for according to real-time potential value and total resistance value, calculates the resistance value determined between transmit port to contact point; Second sub-processing module 365, for according to resistance value and real-time potential value, calculates the induced electricity capacitance determining the inductance capacitance that object is formed when contacting touch control screen and between touch control screen.
Concrete, by above-mentioned sub-acquisition module 361, first sub-processing module 363 and the second sub-processing module 365, first the total resistance value of loop inductance is obtained, wherein, total resistance value can obtain by reading the resistance value of demarcating in advance be stored in storer, also when initialization touch-screen, by calculating, can not repeat herein.After getting the total resistance value of loop inductance, according to real-time potential value and total resistance value, calculate the resistance value of the loop inductance between transmit port to contact point.Last according to resistance value and real-time potential value, calculate and determine when contacting touch control screen, the induced electricity capacitance of the inductance capacitance formed between object and touch control screen.
As a kind of optional embodiment, the second processing module 38 comprises: the 3rd sub-processing module 381, the 4th sub-processing module 383 and the second sub-determination module 385.
Wherein, the 3rd sub-processing module 381, for the ratio according to resistance value and total resistance value, calculates the relative position of contact point in loop inductance; 4th sub-processing module 383, for according to induced electricity capacitance, calculates and determines the contact area of object at the contact point of contact touch control screen; Second sub-determination module 385, for according to relative position and contact area, in conjunction with the arranging rule of loop inductance on touch control screen, determines the relative coordinate of contact point center in touch control screen.
Concrete, by above-mentioned 3rd sub-processing module 381, the 4th sub-processing module 383 and the second sub-determination module 385 according to the ratio between resistance value and total resistance value, the relative position of contact point in loop inductance can be calculated.Because of contact area and the proportional relation of induced electricity capacitance of object contact touch control screen, so according to induced electricity capacitance, the contact area of object at the contact point of contact touch control screen can be calculated.According to the above-mentioned relative position that calculates and contact area, and the bat of the loop inductance of combination of touch control formula screen is irregular, can determine the relative coordinate at the center of object and touch control screen contact point.
By the touch control screen in above-described embodiment in conjunction with touch detecting method, complete and only need of the prior art 1/tens full frame detection time to part, thus controller is had ample time improve report point rate and linear resolution.On the other hand, can by the technical scheme related in above-described embodiment, solve touch control detection that current industry cannot the avoid difficult problem by display interference.And extremely short display blanking interval can be utilized, complete the reliability that detection greatly can improve In-cell (being embedded in liquid crystal pixel by touch panel function) and On-cell (being embedded between colored filter substrate and Polarizer by touch panel function) technology, and In-cell and On-cell technology can be applied on large size panel become possibility.
Technical scheme involved in above-described embodiment makes the quantity of sendaisle and receiving cable reduce to 4, this makes, and the configuration of electrodes on touch control screen is simple, consistent and uniform, the technological requirement of touch-screen, cost are reduced, and corresponding yield also improves thereupon.Thereupon, sendaisle and the receiving cable pipe leg number of touch chip also reduce to 4 accordingly, can greatly reduce chip area cost and packaging cost.And because number of pin tails off, make touch chip and main application processor integrated chip become simple and feasible.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
In the above embodiment of the present invention, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
In several embodiments that the application provides, should be understood that, disclosed technology contents, the mode by other realizes.Wherein, device embodiment described above is only schematic, the such as division of described unit, can be that a kind of logic function divides, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of unit or module or communication connection can be electrical or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed on multiple unit.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.
If described integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprises all or part of step of some instructions in order to make a computer equipment (can be personal computer, server or the network equipment etc.) perform method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, ROM (read-only memory) (ROM, Read-OnlyMemory), random access memory (RAM, RandomAccessMemory), portable hard drive, magnetic disc or CD etc. various can be program code stored medium.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (20)
1. a touch control screen, comprising: display panel, sensor circuit and control circuit, and described control circuit is set up with described sensor circuit and is electrically connected, and it is characterized in that,
Described display panel comprises: viewing area and non-viewing area;
Described sensor circuit comprises: multiple induction electrode, multiple connecting electrode, transmit port and receiving port;
Be laid with at least two loop inductances on said display panel, described in every bar, loop inductance comprises: described multiple induction electrode and described multiple connecting electrode, each described induction electrode is connected in series with the electrode connection mode preset, and the described connecting electrode by being arranged at the described non-viewing area of described display panel between described induction electrode connects, wherein, described loop inductance is electrically connected with described control circuit by corresponding transmit port and receiving port;
Wherein, described induction electrode is arranged in the first side and/or second side of the described viewing area of described display panel in mode arranged in parallel.
2. touch control screen according to claim 1, is characterized in that, comprises induction electrode described in n bar in described viewing area on said display panel.
3. touch control screen according to claim 2, it is characterized in that, when described induction electrode is arranged in described first side of the described viewing area on described display panel and described second side with parallel arrangement mode, described electrode connection mode is: connect the adjacent described induction electrode in described display panel phase the same side by described connecting electrode with the form of series connection, form at least two described loop inductances.
4. touch control screen according to claim 3, it is characterized in that, multiple first induction electrode of described first side and multiple second induction electrodes of described second side are with monospacing, parallel arrangement mode is arranged in the described viewing area of described display panel, described multiple first induction electrode and described multiple second induction electrode are on said display panel in paliform, wherein, by multiple first connecting electrodes of described first side of described display panel, adjacent described multiple first induction electrodes are connected in the mode of series connection, form at least one the first loop inductances, by multiple second connecting electrodes of described second side of described display panel, connect adjacent described multiple second induction electrodes in the mode of connecting, form at least one the second loop inductances.
5. touch control screen according to claim 4, it is characterized in that, the first induction electrode described in i bar is comprised in the described viewing area of described first side of described display panel, the second induction electrode described in j bar is comprised in the described viewing area of described second side of described display panel, wherein, described i and described j sum equal described n.
6. touch control screen according to claim 2, it is characterized in that, when described induction electrode is arranged in described first side of the described viewing area on described display panel or described second side with parallel arrangement mode, described electrode connection mode is: connect alternate described induction electrode by described connecting electrode with the form of series connection, form at least two described loop inductances.
7. touch control screen according to claim 2, it is characterized in that, m bar auxiliary induction electrode is also comprised in the described viewing area of described display panel, described m is the integral multiple of described n, wherein, described auxiliary induction electrode is arranged at the one or both sides of described induction electrode, is connected by described auxiliary induction electrode, form at least two auxiliary induction loops with the auxiliary electrode connected mode preset.
8. touch control screen according to claim 1, is characterized in that, the described induction electrode in described sensor circuit and/or described connecting electrode adopt indium-tin oxide electrode.
9. touch control screen according to claim 1, is characterized in that, described sensor circuit also comprises:
Substrate, described substrate is arranged at the display side of described display panel, and described loop inductance is laid on described substrate;
Wherein, described induction electrode is arranged in the first side and/or second side of the first area of described substrate in mode arranged in parallel, and the described connecting electrode by being arranged at the second area of described substrate between described induction electrode connects, described first area is region corresponding with the described viewing area of described display panel on the substrate, and described second area is region corresponding with the described non-viewing area of described display panel on the substrate.
10. touch control screen according to claim 9, is characterized in that, the described substrate in described sensor circuit is the electrically-conductive backing plate with conductive layer, and described induction electrode and/or described connecting electrode are etched on described electrically-conductive backing plate.
11. 1 kinds of touch detecting methods based on touch control screen described in any one in claim 1 to 10, it is characterized in that, described touch control screen comprises: display panel, sensor circuit and control circuit, wherein, described sensor circuit at least comprises two loop inductances, and described method comprises:
With predeterminated frequency, charge and discharge potential detection is carried out to the loop inductance in sensor circuit, obtain the potential value at described loop inductance two ends;
Compare with the threshold value preset according to the changing value that described potential value changes, judged whether touch control screen described in object contact;
When the changing value of described potential value exceedes the threshold value pre-set, calculate the induced electricity capacitance of the inductance capacitance that described object is formed when contacting described touch control screen and between described touch control screen, and the resistance value between transmit port in described sensor circuit to contact point, wherein, described contact point is for characterizing position during touch control screen described in described object contact;
According to described resistance value and described induced electricity capacitance, calculate the relative coordinate of described contact point on touch control screen.
12. methods according to claim 11, is characterized in that, carry out charge and discharge potential detection described with predeterminated frequency to the loop inductance in sensor circuit, and before obtaining the potential value at described loop inductance two ends, described method also comprises:
When not having touch control screen described in object contact, the port electric capacity of transmit port will be connected with described loop inductance one end by the charging circuit of control circuit, charges to the set potential pre-set;
By the receiving test circuit of described control circuit, detect the potential value of the receiving port be connected with the described loop inductance other end as reference potential value.
13. methods according to claim 12, is characterized in that, compare, judged whether touch control screen described in object contact, having comprised according to the changing value that described potential value changes within the unit interval with the threshold value preset:
When by described charging circuit to the port capacitor charging of the described transmit port of described loop inductance to described set potential time, determined the real-time potential value of described receiving port by described receiving test circuit;
When the difference of described reference potential value and described real-time potential value is greater than predetermined threshold value, define touch control screen described in object contact.
14. methods according to claim 13, it is characterized in that, calculate the induced electricity capacitance of inductance capacitance that described object is formed when contacting described touch control screen and between described touch control screen, and the resistance value between transmit port in described sensor circuit to contact point, comprising:
Obtain the total resistance value of described loop inductance;
According to described real-time potential value and described total resistance value, calculate the described resistance value determined between described transmit port to described contact point;
According to described resistance value and described real-time potential value, calculate the induced electricity capacitance determining the inductance capacitance that described object is formed when contacting described touch control screen and between described touch control screen.
15. methods according to claim 14, is characterized in that, according to described resistance value and described induced electricity capacitance, calculate the relative coordinate of described contact point on touch control screen, comprising:
According to the ratio of described resistance value and described total resistance value, calculate the relative position of described contact point in described loop inductance;
According to described induced electricity capacitance, calculate and determine the contact area of described object at the described contact point of the described touch control screen of contact;
According to described relative position and described contact area, in conjunction with the arranging rule of described loop inductance on described touch control screen, determine the described relative coordinate of described contact point center in described touch control screen.
16. 1 kinds of touch detecting apparatus based on touch control screen described in any one in claim 1 to 10, it is characterized in that, described touch control screen comprises: display panel, sensor circuit and control circuit, wherein, described sensor circuit at least comprises two loop inductances, and described device comprises:
Acquisition module, for carrying out charge and discharge potential detection with predeterminated frequency to the loop inductance in sensor circuit, obtains the potential value at described loop inductance two ends;
Comparing module, compares with the threshold value preset for the changing value changed according to described potential value, has judged whether touch control screen described in object contact;
First processing module, when the changing value of described potential value exceedes the threshold value pre-set, for calculating the induced electricity capacitance of the inductance capacitance that described object is formed when contacting described touch control screen and between described touch control screen, and the resistance value between transmit port in described sensor circuit to contact point, wherein, described contact point is for characterizing position during touch control screen described in described object contact;
Second processing module, for according to described resistance value and described induced electricity capacitance, calculates the relative coordinate of described contact point on touch control screen.
17. devices according to claim 16, is characterized in that, described device also comprises:
Charging module, for when not having touch control screen described in object contact, the port electric capacity of transmit port will be connected with described loop inductance one end by the charging circuit of control circuit, charges to the set potential pre-set;
Detection module, for the receiving test circuit by described control circuit, detects the potential value of the receiving port be connected with the described loop inductance other end as reference potential value.
18. devices according to claim 17, is characterized in that, described comparing module comprises:
Sub-detection module, for when by described charging circuit to the port capacitor charging of the described transmit port of described loop inductance to described set potential time, determined the real-time potential value of described receiving port by described receiving test circuit;
First sub-determination module, for when the difference of described reference potential value and described real-time potential value is greater than predetermined threshold value, defines touch control screen described in object contact.
19. devices according to claim 18, is characterized in that, described first processing module comprises:
Sub-acquisition module, for obtaining the total resistance value of described loop inductance;
First sub-processing module, for according to described real-time potential value and described total resistance value, calculates the described resistance value determined between described transmit port to described contact point;
Second sub-processing module, for according to described resistance value and described real-time potential value, calculates the induced electricity capacitance determining the inductance capacitance that described object is formed when contacting described touch control screen and between described touch control screen.
20. devices according to claim 19, is characterized in that, described second processing module comprises:
3rd sub-processing module, for the ratio according to described resistance value and described total resistance value, calculates the relative position of described contact point in described loop inductance;
4th sub-processing module, for according to described induced electricity capacitance, calculates and determines the contact area of described object at the described contact point of the described touch control screen of contact;
Second sub-determination module, for according to described relative position and described contact area, in conjunction with the arranging rule of described loop inductance on described touch control screen, determines the described relative coordinate of described contact point center in described touch control screen.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105759139A (en) * | 2016-02-04 | 2016-07-13 | 深圳精智达技术股份有限公司 | Touch screen test device and test method |
| CN106680643A (en) * | 2016-12-30 | 2017-05-17 | 武汉华星光电技术有限公司 | Detection method for Incell self-capacitance module panel |
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| CN106680643A (en) * | 2016-12-30 | 2017-05-17 | 武汉华星光电技术有限公司 | Detection method for Incell self-capacitance module panel |
| CN106680643B (en) * | 2016-12-30 | 2020-06-09 | 武汉华星光电技术有限公司 | Incell self-contained module panel detection method |
| TWI662459B (en) * | 2018-07-05 | 2019-06-11 | 友達光電股份有限公司 | Touch panel |
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