CN103294292A - Capacitive touch screen and touch detecting method thereof - Google Patents
Capacitive touch screen and touch detecting method thereof Download PDFInfo
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- CN103294292A CN103294292A CN2012100858780A CN201210085878A CN103294292A CN 103294292 A CN103294292 A CN 103294292A CN 2012100858780 A CN2012100858780 A CN 2012100858780A CN 201210085878 A CN201210085878 A CN 201210085878A CN 103294292 A CN103294292 A CN 103294292A
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Abstract
The invention discloses a touch detecting method of a capacitive touch screen. The touch detecting method comprises the following steps: a plurality of rows of scanning electrodes of the touch screen are scanned and a plurality of columns of induction electrodes of the touch screen are read; the scanning operation process of the rows of scanning electrodes is as follows: at least two adjacent rows of scanning electrodes are classified as one scanning electrode group, the scanning electrode groups are scanned group by group, and every two adjacent scanning electrode groups share at least one row of scanning electrodes; and the reading operation process of the columns of induction electrodes is as follows: at least two adjacent columns of induction electrodes are classified as one induction electrode group, the induction electrode groups are read group by group, and every two adjacent induction electrode groups share at least one column of induction electrodes. When scanning signals are input, the scanning signals are input to one group of scanning electrodes; when induction signals are read, the induction signals produced by one group of induction electrodes are read; and because the intensity of the induction signals is increased, the problem of detection failures caused by over low-intensity induction signals is avoided.
Description
Technical field
The invention belongs to field of human-computer interaction, relate in particular to a kind of touch detecting method and capacitive touch screen of capacitive touch screen.
Background technology
Touch-screen is the simplest, convenient, natural at present a kind of man-machine interaction mode as a kind of input media.Therefore, touch-screen more and more is applied in the various electronic products, for example mobile phone, notebook computer, MP3/MP4 etc.For reducing the cost of various electronic equipments, make various electronic equipments more frivolous, touch-screen is integrated in the display panels usually.According to principle of work with detect the different of touch information medium, touch-screen can be divided into four types of resistance-type, condenser type, infrared-type and surface acoustic waves.The capacitive touch screen technology is because characteristics such as technology is simple, life of product length, transmittance height become the touch screen technology of present main flow.
As Fig. 1, Fig. 2 and shown in Figure 3; existing a kind of capacitive touch screen comprises: glass substrate 10; be arranged on described glass substrate 10 lip-deep driving layers 11; be arranged on described driving layer 11 lip-deep insulating medium layer 12; be arranged on described insulating medium layer 12 lip-deep inductive layers 13, and be arranged on described inductive layer 13 lip-deep protective seams 14.Described driving layer 11 comprises many scan electrode 11a, 11b, 11c, the 11d...... that are parallel to each other, every scan electrode is in series by a plurality of sub-scan electrodes 111, each sub-scan electrode 111 is brilliant, and described a plurality of sub-scan electrode 111 is regularly arranged on described glass substrate 10 surfaces.Described inductive layer 13 comprises many induction electrode 13a, the 13b, 13c, the 13d...... that are parallel to each other, every induction electrode is in series by a plurality of sub-induction electrodes 131, each sub-induction electrode 131 is brilliant, and described a plurality of sub-induction electrode 131 is regularly arranged on described insulating medium layer 12 surfaces.Described scan electrode 11a, 11b, 11c, 11d...... and described induction electrode 13a, 13b, 13c, 13d...... are orthogonal, and every induction electrode is electrically connected with testing circuit by gating switch module 20.
Form mutual capacitance between sub-induction electrode 131 and the sub-scan electrode 111, testing circuit obtains the particular location that finger touches touch-screen by measuring the variation of the caused mutual capacitance of finger touches touch-screen.
Its principle of work is specially: be example with scan electrode 11a, be applied with driving voltage 40 on the scan electrode 11a, other scan electrodes 11b, 11c, 11d...... ground connection, induction electrode 13a is connected with testing circuit 30 by gating switch 20, that detect this moment is scan electrode 11a and induction electrode 13a, finger touch is at the intersection point place of these two lines, have induced signal, pass through gating switch module 20 then more successively with induction electrode 13b, 13c, 13d...... be connected with testing circuit 30, detect scan electrode 11a and induction electrode 13b this moment, 13c, 13d...... the signal at intersection point place; Afterwards, apply driving voltage successively for scan electrode 11b, 11c, 11d......, driven sweep electrode 11b, 11c, 11d...... finish the driving process successively, finish the driving to all scan electrode 11a, 11b, 11c, 11d...... and all induction electrode 13a, 13b, 13c, 13d...... intersection point like this.
But the induced signal of existing capacitive touch screen is generally less, causes easily and detects failure.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of touch detecting method and capacitive touch screen of capacitive touch screen, generally less with the induced signal that solves existing capacitive touch screen, cause the problem that detects failure easily.
The touch detecting method of this capacitive touch screen comprises:
The fine scanning electrode of touch-screen is carried out scan operation and the multiple row induction electrode of touch-screen is carried out read operation;
Described fine scanning electrode to touch-screen carries out the scan operation process and is, at least two adjacent line scanning electrodes are divided into one scan electrode group and carry out scan operation by group, and adjacent scan electrode group shares at least one line scanning electrode;
Described multiple row induction electrode to touch-screen carries out the read operation process and is, at least two adjacent row induction electrodes are divided into an induction electrode group and carry out read operation by group, and adjacent induction electrode group shares at least one row induction electrode.
Preferably, each scan electrode group is carried out all each induction electrode group being carried out read operation by group after the scan operation.
Preferably, each scan electrode group is carried out after the scan operation all each induction electrode group is carried out also comprising after the read operation by group:
The induced signal that reads is screened, obtain maximum induced signal, determined the lateral attitude of touch area by described maximum induced signal, the sweep signal corresponding with described maximum induced signal determined the lengthwise position of touch area, then determines the touch area according to described maximum induced signal and the sweep signal corresponding with described maximum induced signal.
Preferably, a scan electrode group comprises adjacent M line scanning electrode, and adjacent scan electrode group shares N line scanning electrode, 1≤N≤M-1 wherein, and described M, N are positive integer, and M 〉=2.
Preferably, an induction electrode group comprises adjacent P row induction electrode, and adjacent induction electrode group shares Q row induction electrode, 1≤Q≤P-1 wherein, and described P, Q are positive integer, and P 〉=2.
Preferably, described M equates with P.
Preferably, described M=P=2 or 3 or 4 or 5 or 6.
Preferably, described N=M-1.
Preferably, described Q=P-1.
A kind of capacitive touch screen comprises:
The touch sensible electrod-array, described touch sensible electrod-array comprises fine scanning electrode and multiple row induction electrode;
Scan drive circuit, described scan drive circuit carries out scan operation to the fine scanning electrode of described touch-screen;
Touch detection circuit, described touch detection circuit carries out read operation to the multiple row induction electrode of described touch-screen;
Wherein, described scan drive circuit to the mode that the fine scanning electrode of described touch-screen carries out scan operation is, at least two adjacent line scanning electrodes are divided into one scan electrode group and carry out scan operation by group, and adjacent scan electrode group shares at least one line scanning electrode;
Described touch detection circuit to the mode that the multiple row induction electrode of described touch-screen carries out read operation is, at least two adjacent row induction electrodes are divided into an induction electrode group and carry out read operation by group, and adjacent induction electrode group shares at least one row induction electrode.
Preferably, described fine scanning electrode is arranged in order along first direction, and described multiple row induction electrode is arranged in order along the first direction extension and along second direction, and described first direction is vertical substantially with second direction.
Preferably, described capacitive touch screen also comprises a substrate, described fine scanning electrode and multiple row induction electrode are arranged on the described substrate, and described fine scanning electrode and multiple row induction electrode are arranged in a crossed manner and be provided with the insulation course that makes described scan electrode and induction electrode electrical isolation at infall.
Preferably, described fine scanning electrode and multiple row induction electrode are arranged on the substrate, and described fine scanning electrode and multiple row induction electrode are arranged on same one deck.
Preferably, the described scan electrode of each row comprises a plurality of sub-scan electrodes, and the sub-scan electrode of fine scanning electrode arranges a described induction electrode at first direction formation scan electrode row between per two scan electrodes row.
Preferably, after described scan drive circuit carried out scan operation to a scan electrode group, described touch detection circuit carried out read operation by group to each induction electrode group.
Preferably, described scan drive circuit carries out after the scan operation all each induction electrode group is carried out also comprising after the read operation by group to each scan electrode group:
The induced signal that reads is screened, obtain maximum induced signal, determined the lateral attitude of touch area by described maximum induced signal, the sweep signal corresponding with described maximum induced signal determined the lengthwise position of touch area, then determines the touch area according to described maximum induced signal and the sweep signal corresponding with described maximum induced signal.
Preferably, a scan electrode group comprises adjacent M line scanning electrode, and adjacent scan electrode group shares N line scanning electrode, 1≤N≤M-1 wherein, and described M, N are positive integer, and M 〉=2.
Preferably, an induction electrode group comprises adjacent P row induction electrode, and adjacent induction electrode group shares Q row induction electrode; 1≤Q≤P-1 wherein, described P, Q are positive integer, and P 〉=2.
Preferably, described M equates with P.
Preferably, described M=P=2 or 3 or 4 or 5 or 6.
Preferably, described N=M-1.
Preferably, described Q=P-1.
As seen, the touch detecting method of capacitive touch screen disclosed in this invention, owing to the fine scanning electrode to touch-screen carries out the scan operation process be, at least two adjacent line scanning electrodes are divided into one scan electrode group and carry out scan operation by group, and adjacent scan electrode group shares at least one line scanning electrode; Described multiple row induction electrode to touch-screen carries out the read operation process and is, at least two adjacent row induction electrodes are divided into an induction electrode group and carry out read operation by group, and adjacent induction electrode group shares at least one row induction electrode.So, be to one group of scan electrode input scan signal during the input scan signal, accordingly, be to read the induced signal that one group of induction electrode produces when reading induced signal, the induced signal that namely reads is the stack of the long-living induced signal of interior many induction electrodes of one group of induction electrode, so compared to prior art, the intensity of induced signal has increased, the problem of the detection failure of having avoided causing owing to induced signal is too small.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the cross-sectional view of prior art capacitive touch screen;
Fig. 2 is the structural representation that the prior art capacitive touch screen drives layer;
Fig. 3 is the structural representation of prior art capacitive touch screen inductive layer;
Fig. 4 is the synoptic diagram of detection method of capacitance-type touch screen disclosed in this invention;
Fig. 5 is the structural representation of a kind of capacitive touch screen disclosed in this invention;
Fig. 6 is the structural representation of another kind of capacitive touch screen disclosed in this invention.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Just as stated in the Background Art, the induced signal of existing capacitive touch screen is generally less, causes the problem that detects failure easily.
The inventor finds after deliberation, the touch detecting method of existing capacitive touch screen is generally scan electrode to wall scroll to carry out scan operation and the induction electrode of wall scroll is carried out read operation, for having bigger scan electrode and the capacitive touch screen of induction electrode, utilize this kind method to detect and what problem to occur, but bigger scan electrode and induction electrode can cause the reduction of accuracy of detection, yet, when accuracy of detection is higher, corresponding scan electrode and induction electrode are less, at this moment, it is less that the induction electrode of wall scroll is carried out the induced signal that read operation reads, and causes the phenomenon that detects failure easily.
The invention discloses a kind of touch detecting method of capacitive touch screen, this method comprises:
The fine scanning electrode of touch-screen is carried out scan operation and the multiple row induction electrode of touch-screen is carried out read operation, described fine scanning electrode to touch-screen carries out the scan operation process and is, at least two adjacent line scanning electrodes are divided into one scan electrode group and carry out scan operation by group, and adjacent scan electrode group shares at least one line scanning electrode;
Described multiple row induction electrode to touch-screen carries out the read operation process and is, at least two adjacent row induction electrodes are divided into an induction electrode group and carry out read operation by group, and adjacent induction electrode group shares at least one row induction electrode.
By such scheme as can be seen, be to one group of scan electrode input scan signal during the input scan signal, accordingly, be to read the induced signal that one group of induction electrode produces when reading induced signal, the induced signal that namely reads is the stack of the long-living induced signal of interior many induction electrodes of one group of induction electrode, so compared to prior art, the intensity of induced signal has increased, the problem of the detection failure of having avoided causing owing to induced signal is too small.
It more than is the application's core concept, below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
A lot of details have been set forth in the following description so that fully understand the present invention, but the present invention can also adopt other to be different from alternate manner described here and implement, those skilled in the art can do similar popularization under the situation of intension of the present invention, so the present invention is not subjected to the restriction of following public specific embodiment.
The embodiment of the invention discloses a kind of touch detecting method of capacitive touch screen, comprise that fine scanning electrode to touch-screen carries out scan operation and the multiple row induction electrode of touch-screen is carried out read operation.
Described fine scanning electrode to touch-screen carries out the scan operation process and is, at least two adjacent line scanning electrodes are divided into one scan electrode group and carry out scan operation by group, and adjacent scan electrode group shares at least one line scanning electrode;
Described multiple row induction electrode to touch-screen carries out the read operation process and is, at least two adjacent row induction electrodes are divided into an induction electrode group and carry out read operation by group, and adjacent induction electrode group shares at least one row induction electrode.
Concrete, a scan electrode group comprises adjacent M line scanning electrode, adjacent scan electrode group shares N line scanning electrode, 1≤N≤M-1 wherein, described M, N is positive integer, and M 〉=2, be scan electrode that adjacent scan electrode group shares be 1 row or 2 row or 3 row or ... (M-1) row, as shown in Figure 4, for example, M=3, the scan electrode that adjacent scan electrode group shares be N=(M-1) OK, so adjacent scan electrode group shares adjacent 2 line scanning electrodes, the if the 1st, the 2nd, the 3rd line scanning electrode is the first scan electrode group Z1, the 2nd, the 3rd, the 4th line scanning electrode is the second scan electrode group Z2 adjacent with the first scan electrode group Z1, then the first scan electrode group Z1 and the second scan electrode group Z2 share the 2nd, the 3rd line scanning electrode, and owing to be to carry out by group when carrying out scan operation, so the scan electrode that shares is differentiated in the working time, namely the scan electrode that shares is worked simultaneously with the scan electrode group corresponding with it, during first scan electrode group Z1 work (namely being applied in scanning drive signal), the 2nd, the work of the 3rd line scanning electrode; During second scan electrode group Z2 work (namely being applied in scanning drive signal), the 2nd, the 3rd line scanning electrode is also worked; But 2nd, twice work of the 3rd line scanning electrode separates in time.
In addition, need to prove, the described scan operation process of present embodiment, adjacent M line scanning electrode is one scan electrode group, in a scan operation process, M=3, then in next scan operation process, can be M=4, namely in whole touch testing process, the value of M can be (being that the scan electrode bar number average that comprises of each scan electrode group is identical) that equates in each scan operation process, also can be unequal, only need satisfy M 〉=2 and get final product, in the scan electrode that adjacent scan electrode group shares, the N line scanning electrode that every two adjacent scan electrode group share, in whole touch testing process, the value of N can be (being that per two adjacent scan electrode bar number averages that scan electrode group shared are identical) that equates in each scan operation process, also can be unequal, only need to satisfy 1≤N≤M-1 and get final product, the N in this scope can change according to concrete condition.
For example, 1st, the 2nd, the 3rd, the 4th line scanning electrode is that the first scan electrode group Z1 (comprises 4 line scanning electrodes, M=4), 2nd, the 3rd, the 4th, the 5th, the 6th line scanning electrode (comprises 5 line scanning electrodes for the second scan electrode group Z2 adjacent with the first scan electrode group Z1, M=5), the first scan electrode group Z1 and the second scan electrode group Z2 share 3 line scanning electrodes (N=3), namely share the 2nd, the 3rd, the 4th line scanning electrode;
If the 4th, the 5th, the 6th, the 7th line scanning electrode (comprises 4 line scanning electrodes for the 3rd scan electrode group Z3 adjacent with the second scan electrode group Z2, M=4), the second scan electrode group Z2 and the 3rd scan electrode group Z3 can share 3 line scanning electrodes (N=3), namely share the 4th, the 5th, the 6th line scanning electrode;
If the 3rd, the 4th, the 5th, the 6th, the 7th line scanning electrode (comprises 5 line scanning electrodes for the 3rd scan electrode group Z3 adjacent with the second scan electrode group Z2, M=5), the second scan electrode group Z2 and the 3rd scan electrode group Z3 can share 4 line scanning electrodes (N=4), namely share the 3rd, the 4th, the 5th, the 6th line scanning electrode;
And the like, repeat no more.
Concrete, an induction electrode group comprises adjacent P row induction electrode, adjacent induction electrode group shares Q row induction electrode, 1≤Q≤P-1 wherein, described P, Q is positive integer, and P 〉=2, be that the induction electrode that adjacent induction electrode group shares is 1 row or 2 row or 3 row ... (P-1) row, for example, as shown in Figure 4, P=3, the induction electrode that adjacent induction electrode group shares is Q=(P-1) row, so adjacent induction electrode group shares adjacent 2 row induction electrodes, the if the 1st, the 2nd, the 3rd row induction electrode is the first induction electrode group Z11, the 2nd, the 3rd, the 4th row induction electrode is the second induction electrode group Z12 adjacent with the first induction electrode group Z11, then the first induction electrode group Z11 and the second induction electrode group Z12 share the 2nd, the 3rd row induction electrode, and owing to be to carry out by group when carrying out read operation, so the induction electrode that shares is differentiated in the working time, namely the induction electrode that shares is worked simultaneously with the induction electrode group corresponding with it, during first induction electrode group Z11 work (namely being read the touch sensible signal), the 2nd, the 3rd row induction electrode work; During second induction electrode group Z12 work (namely being read the touch sensible signal), the 2nd, the 3rd row induction electrode is also worked; But 2nd, twice work of the 3rd row induction electrode separates in time.
In addition, need to prove, the described read operation process of present embodiment, adjacent P row induction electrode is an induction electrode group, in a read operation process, P=3, then in next read operation process, can be P=4, namely in whole touch testing process, the value of P can be (being that the induction electrode bar number average that comprises of each induction electrode group is identical) that equates in each read operation process, also can be unequal, only need satisfy P 〉=2 and get final product, in the induction electrode that adjacent induction electrode group shares, the Q row induction electrode that every two adjacent induction electrode groups share, in whole touch testing process, the value of Q can be (being that the induction electrode bar number average that shared of per two adjacent induction electrode groups is identical) that equates in each read operation process, also can be unequal, only need to satisfy 1≤Q≤P-1 and get final product, the Q in this scope can change according to concrete condition.
For example, 1st, the 2nd, the 3rd, the 4th row induction electrode is that the first induction electrode group Z11 (comprises 4 row induction electrodes, P=4), 2nd, the 3rd, the 4th, the 5th, the 6th row induction electrode (comprises 5 row induction electrodes for the second induction electrode group Z12 adjacent with the first induction electrode group Z11, P=5), the first induction electrode group Z11 and the second induction electrode group Z12 share 3 row induction electrodes (Q=3), namely share the 2nd, the 3rd, the 4th row induction electrode;
If the 4th, the 5th, the 6th, the 7th row induction electrode (comprises 4 row induction electrodes for the 3rd induction electrode group Z13 adjacent with the second induction electrode group Z12, P=4), the second induction electrode group Z12 and the 3rd induction electrode group Z13 can share 3 row induction electrodes (Q=3), namely share the 4th, the 5th, the 6th row induction electrode;
If the 3rd, the 4th, the 5th, the 6th, the 7th row induction electrode (comprises 5 row induction electrodes for the 3rd induction electrode group Z13 adjacent with the second induction electrode group Z12, P=5), the second induction electrode group Z12 and the 3rd induction electrode group Z13 can share 4 row induction electrodes (Q=4), namely share the 3rd, the 4th, the 5th, the 6th row induction electrode;
And the like, repeat no more.
In the ordinary course of things, described M equates that with P if still actual conditions have specific (special) requirements, described M and P also can be unequal, the relation that is M and P is set as the case may be, when M equates with P, be M=P=2 or 3 or 4 or 5 or 6 for the M of general capacitive touch screen and the value of P, the capacitive touch screen of having relatively high expectations for accuracy of detection, the value of M and P can be bigger, this kind situation can be understood as again, when the value of M and P is big, can increase the accuracy of detection of capacitive touch screen.
When detecting, each scan electrode group is carried out all each induction electrode group being carried out read operation by group after the scan operation, for example, at first above-mentioned first scan electrode group is carried out scan operation, other scan electrode ground connection, the first induction electrode group is connected with testing circuit by gating switch, the first induction electrode group is carried out read operation, what detected this moment is the signal at first scan electrode group and the overlapping place of the first induction electrode group, pass through the gating switch module then more successively with the second induction electrode group, the 3rd induction electrode group, the 4th induction electrode group ... be connected with testing circuit, successively to the second induction electrode group, the 3rd induction electrode group, the 4th induction electrode group ... carry out read operation detects first scan electrode group and the first induction electrode group this moment, the second induction electrode group, the 3rd induction electrode group ... the signal at overlapping place; Afterwards, give second scan electrode group, the 3rd scan electrode group, the 4th scan electrode group ... apply sweep signal successively, successively to second scan electrode group, the 3rd scan electrode group, the 4th scan electrode group ... carry out scan operation, finish testing process.
Finger touch is in the intersection of this scan electrode electrode and induction electrode, have induced signal, because described touch capacitance plate is that to organize be the detection that unit carries out, so several groups of induction electrodes all can have the generation of induced signal near the finger touch zone, so each scan electrode group is carried out after the scan operation all each induction electrode group is carried out also comprising after the read operation by group:
The induced signal that reads is screened, obtain maximum induced signal, by touching at finger from nearest some induced signal maximum at place of described touch-screen, the induced signal of its peripheral region is along with the distance of finger from described touch-screen reduces successively, so, producing the induction electrode group of maximum induced signal and the scan electrode group determined position corresponding with it is the physical location of finger touch, and because described maximum induced signal is determined the lateral attitude of touch area, the sweep signal corresponding with described maximum induced signal determined the lengthwise position of touch area, then determines the touch area according to described maximum induced signal and the sweep signal corresponding with described maximum induced signal.
Another embodiment of the present invention discloses a kind of capacitive touch screen, as shown in Figure 5, comprising:
The touch sensible electrod-array, described touch sensible electrod-array comprises: fine scanning electrode 101a, 101b, 101c...... and multiple row induction electrode 102a, 102b, 102c.......
Described touch capacitance plate also comprises a substrate 100, described fine scanning electrode 101a, 101b, 101c...... and multiple row induction electrode 102a, 102b, 102c...... be arranged on the substrate 100, and described scan electrode 101a, 101b, 101c...... and multiple row induction electrode 102a, 102b, 102c...... it is arranged in a crossed manner, and be provided with at infall and make described fine scanning electrode 101a, 101b, 101c...... and multiple row induction electrode 102a, 102b, 102c...... the insulation course (not shown) of electrical isolation, described fine scanning electrode 101a, 101b, 101c...... be arranged in order along first direction, described multiple row induction electrode 102a, 102b, 102c...... extend along first direction, and be arranged in order along second direction, and described first direction is vertical substantially with second direction.
Need to prove, though scan electrode and induction signal are drawn as strip shaped electric poles among Fig. 5, but in fact scan electrode and induction electrode can be designed to difformity according to actual needs, for example can adopt Fig. 2 and scan electrode shown in Figure 3 and the shape of induction electrode.
Perhaps, as shown in Figure 6, be arranged on the substrate 20 along fine scanning electrode 21a, 21b, the 21c...... of first direction arrangement and multiple row induction electrode 22a, 22b, the 22c...... that arranges along second direction, and described fine scanning electrode 21a, 21b, 21c...... and multiple row induction electrode 22a, 22b, 22c...... are arranged on same one deck, and first direction is vertical substantially with second direction.At this moment, the described scan electrode of each row, namely scan electrode 21a, 21b, 21c...... comprise a plurality of sub-scan electrodes 21.Sub-scan electrode in the same line scanning electrode is arranged and is linked together by peripheral leads along second direction, and the sub-scan electrode 21 of fine scanning electrode 21a, 21b, 21c...... forms between scan electrode row 23a, per two scan electrodes row of 23b, 23c...... at first direction an induction electrode is set. Scan electrode row 23a, 23b, 23c...... arrange along second direction, are parallel to multiple row induction electrode 22a, 22b, 22c.......In the present embodiment, described fine scanning electrode and multiple row induction electrode are arranged under the situation with one deck, can reduce the thickness of capacitive touch screen, make it more frivolous, convenient.
Described touch capacitance plate also comprises:
Scan drive circuit, described scan drive circuit carries out scan operation to fine scanning electrode 101a, 101b, the 101c...... of described touch-screen;
Touch detection circuit, described touch detection circuit carries out read operation to multiple row induction electrode 102a, 102b, the 102c...... of described touch-screen;
Wherein, described scan drive circuit to the fine scanning electrode 101a of described touch-screen, the mode that 101b, 101c...... carry out scan operation is, at least two adjacent line scanning electrodes are divided into one scan electrode group and carry out scan operation by group, and adjacent scan electrode group shares at least one line scanning electrode;
Described touch detection circuit to the multiple row induction electrode 102a of described touch-screen, the mode that 102b, 102c...... carry out read operation is, at least two adjacent row induction electrodes are divided into an induction electrode group and carry out read operation by group, and adjacent induction electrode group shares at least one row induction electrode.
Scan electrode group comprises that adjacent M line scanning electrode is group, and adjacent scan electrode group shares N line scanning electrode, 1≤N≤M-1 wherein, and described M, N are positive integer, and M 〉=2; An induction electrode group comprises adjacent P row induction electrode, and adjacent induction electrode group shares Q row induction electrode; 1≤Q≤P-1 wherein, described P, Q are positive integer, and P 〉=2.
In the ordinary course of things, described M equates with P, and M=P=2 or 3 or 4 or 5 or 6.
Concrete, a scan electrode group comprises adjacent M line scanning electrode, adjacent scan electrode group shares N line scanning electrode, 1≤N≤M-1 wherein, described M, N is positive integer, and M 〉=2, be scan electrode that adjacent scan electrode group shares be 1 row or 2 row or 3 row or ... (M-1) row, for example, M=3, the scan electrode that adjacent scan electrode group shares be N=(M-1) OK, so adjacent scan electrode group shares adjacent 2 line scanning electrodes, the if the 1st, the 2nd, the 3rd line scanning electrode is first scan electrode group, the 2nd, the 3rd, the 4th line scanning electrode is second scan electrode group adjacent with first scan electrode group, and then first scan electrode group and second scan electrode group share the 2nd, the 3rd line scanning electrode.
In addition, need to prove, the value of M can be (being that the scan electrode bar number average that comprises of each scan electrode group is identical) that equates, also can be unequal, only need satisfy M 〉=2 gets final product, in the scan electrode that adjacent scan electrode group shares, the N line scanning electrode that every two adjacent scan electrode group share, the value of N can be (being that per two adjacent scan electrode bar number averages that scan electrode group shared are identical) that equates, also can be unequal, only need to satisfy 1≤N≤M-1 and get final product, the N in this scope can change according to concrete condition.
For example, 1st, the 2nd, the 3rd, the 4th line scanning electrode is that the first scan electrode group Z1 (comprises 4 line scanning electrodes, M=4), 2nd, the 3rd, the 4th, the 5th, the 6th line scanning electrode (comprises 5 line scanning electrodes for the second scan electrode group Z2 adjacent with the first scan electrode group Z1, M=5), the first scan electrode group Z1 and the second scan electrode group Z2 share 3 line scanning electrodes (N=3), namely share the 2nd, the 3rd, the 4th line scanning electrode;
If the 4th, the 5th, the 6th, the 7th line scanning electrode (comprises 4 line scanning electrodes for the 3rd scan electrode group Z3 adjacent with the second scan electrode group Z2, M=4), the second scan electrode group Z2 and the 3rd scan electrode group Z3 can share 3 line scanning electrodes (N=3), namely share the 4th, the 5th, the 6th line scanning electrode;
If the 3rd, the 4th, the 5th, the 6th, the 7th line scanning electrode (comprises 5 line scanning electrodes for the 3rd scan electrode group Z3 adjacent with the second scan electrode group Z2, M=5), the second scan electrode group Z2 and the 3rd scan electrode group Z3 can share 4 line scanning electrodes (N=4), namely share the 3rd, the 4th, the 5th, the 6th line scanning electrode;
And the like, repeat no more.
Concrete, an induction electrode group comprises adjacent P row induction electrode, adjacent induction electrode group shares Q row induction electrode, 1≤Q≤P-1 wherein, described P, Q is positive integer, and P 〉=2, be that the induction electrode that adjacent induction electrode group shares is 1 row or 2 row or 3 row ... (P-1) row, for example, P=3, the induction electrode that adjacent induction electrode group shares is Q=(P-1) row, so adjacent induction electrode group shares adjacent 2 row induction electrodes, the if the 1st, the 2nd, the 3rd row induction electrode is the first induction electrode group, the 2nd, the 3rd, the 4th row induction electrode is the second induction electrode group adjacent with the first induction electrode group, then the first induction electrode group and the second induction electrode group share the 2nd, the 3rd row induction electrode, and owing to be to carry out by group when carrying out read operation, so the induction electrode that shares is differentiated in the working time, namely the induction electrode that shares is worked simultaneously with the induction electrode group corresponding with it, during first induction electrode group work (namely being read the touch sensible signal), the 2nd, the 3rd row induction electrode work; During second induction electrode group Z12 work (namely being read the touch sensible signal), the 2nd, the 3rd row induction electrode is also worked; But 2nd, twice work of the 3rd row induction electrode separates in time.
In addition, need to prove, adjacent P row induction electrode is an induction electrode group, the value of P is can be (being that the induction electrode bar number average that comprises of each induction electrode group is identical) that equates, also can be unequal, only need satisfy P 〉=2 gets final product, the Q row induction electrode that every two adjacent induction electrode groups share, the value of Q can be (being that the induction electrode bar number average that shared of per two adjacent induction electrode groups is identical) that equates, also can be unequal, only need to satisfy 1≤Q≤P-1 and get final product, the Q in this scope can change according to concrete condition.
For example, 1st, the 2nd, the 3rd, the 4th row induction electrode is that the first induction electrode group Z11 (comprises 4 row induction electrodes, P=4), 2nd, the 3rd, the 4th, the 5th, the 6th row induction electrode (comprises 5 row induction electrodes for the second induction electrode group Z12 adjacent with the first induction electrode group Z11, P=5), the first induction electrode group Z11 and the second induction electrode group Z12 share 3 row induction electrodes (Q=3), namely share the 2nd, the 3rd, the 4th row induction electrode;
If the 4th, the 5th, the 6th, the 7th row induction electrode (comprises 4 row induction electrodes for the 3rd induction electrode group Z13 adjacent with the second induction electrode group Z12, P=4), the second induction electrode group Z12 and the 3rd induction electrode group Z13 can share 3 row induction electrodes (Q=3), namely share the 4th, the 5th, the 6th row induction electrode;
If the 3rd, the 4th, the 5th, the 6th, the 7th row induction electrode (comprises 5 row induction electrodes for the 3rd induction electrode group Z13 adjacent with the second induction electrode group Z12, P=5), the second induction electrode group Z12 and the 3rd induction electrode group Z13 can share 4 row induction electrodes (Q=4), namely share the 3rd, the 4th, the 5th, the 6th row induction electrode;
And the like, repeat no more.
After described scan drive circuit carried out scan operation to a scan electrode group, described touch detection circuit carried out read operation by group to each induction electrode group.Described scan drive circuit carries out after the scan operation all each induction electrode group is carried out also comprising after the read operation by group to each scan electrode group:
The induced signal that reads is screened, obtain maximum induced signal, determined the lateral attitude of touch area by described maximum induced signal, the sweep signal corresponding with described maximum induced signal determined the lengthwise position of touch area, then determines the touch area according to described maximum induced signal and the sweep signal corresponding with described maximum induced signal.
Need to prove that described scan drive circuit can also carry out scan operation to all scan electrode group, simultaneously, described touch detection circuit carries out read operation by group to each induction electrode group.Concrete working method and above-mentioned situation are similar, do not do at this and give unnecessary details.
Various piece adopts the mode of going forward one by one to describe in this instructions, and what each part stressed is and the difference of other parts that identical similar part is mutually referring to getting final product between the various piece.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments herein.Therefore, the present invention will can not be restricted to embodiment illustrated herein, but will meet the wideest scope consistent with principle disclosed herein and features of novelty.
Claims (22)
1. the touch detecting method of a capacitive touch screen comprises that fine scanning electrode to touch-screen carries out scan operation and the multiple row induction electrode of touch-screen is carried out read operation, is characterized in that:
Described fine scanning electrode to touch-screen carries out the scan operation process and is, at least two adjacent line scanning electrodes are divided into one scan electrode group and carry out scan operation by group, and adjacent scan electrode group shares at least one line scanning electrode;
Described multiple row induction electrode to touch-screen carries out the read operation process and is, at least two adjacent row induction electrodes are divided into an induction electrode group and carry out read operation by group, and adjacent induction electrode group shares at least one row induction electrode.
2. according to the described detection method of claim 1, it is characterized in that, each scan electrode group is carried out all each induction electrode group being carried out read operation by group after the scan operation.
3. according to the described detection method of claim 2, it is characterized in that, each scan electrode group carried out after the scan operation all each induction electrode group is carried out also comprising after the read operation by group:
The induced signal that reads is screened, obtain maximum induced signal, determined the lateral attitude of touch area by described maximum induced signal, the sweep signal corresponding with described maximum induced signal determined the lengthwise position of touch area, then determines the touch area according to described maximum induced signal and the sweep signal corresponding with described maximum induced signal.
4. according to the described detection method of claim 3, it is characterized in that a scan electrode group comprises adjacent M line scanning electrode, adjacent scan electrode group shares N line scanning electrode, 1≤N≤M-1 wherein, and described M, N are positive integer, and M 〉=2.
5. according to the described detection method of claim 4, it is characterized in that an induction electrode group comprises adjacent P row induction electrode, adjacent induction electrode group shares Q row induction electrode, 1≤Q≤P-1 wherein, and described P, Q are positive integer, and P 〉=2.
6. according to the described detection method of claim 5, it is characterized in that described M equates with P.
7. according to the described detection method of claim 6, it is characterized in that described M=P=2 or 3 or 4 or 5 or 6.
8. according to the described detection method of claim 7, it is characterized in that described N=M-1.
9. according to the described detection method of claim 7, it is characterized in that described Q=P-1.
10. a capacitive touch screen is characterized in that, comprising:
The touch sensible electrod-array, described touch sensible electrod-array comprises fine scanning electrode and multiple row induction electrode;
Scan drive circuit, described scan drive circuit carries out scan operation to the fine scanning electrode of described touch-screen;
Touch detection circuit, described touch detection circuit carries out read operation to the multiple row induction electrode of described touch-screen;
Wherein, described scan drive circuit to the mode that the fine scanning electrode of described touch-screen carries out scan operation is, at least two adjacent line scanning electrodes are divided into one scan electrode group and carry out scan operation by group, and adjacent scan electrode group shares at least one line scanning electrode;
Described touch detection circuit to the mode that the multiple row induction electrode of described touch-screen carries out read operation is, at least two adjacent row induction electrodes are divided into an induction electrode group and carry out read operation by group, and adjacent induction electrode group shares at least one row induction electrode.
11. according to the described capacitive touch screen of claim 10, it is characterized in that, described fine scanning electrode is arranged in order along first direction, and described multiple row induction electrode is arranged in order along the first direction extension and along second direction, and described first direction is vertical substantially with second direction.
12. according to the described capacitive touch screen of claim 11, it is characterized in that, described capacitive touch screen also comprises a substrate, described fine scanning electrode and multiple row induction electrode are arranged on the described substrate, and described fine scanning electrode and multiple row induction electrode are arranged in a crossed manner and be provided with the insulation course that makes described scan electrode and induction electrode electrical isolation at infall.
13., it is characterized in that described fine scanning electrode and multiple row induction electrode are arranged on the substrate according to the described capacitive touch screen of claim 11, and described fine scanning electrode and multiple row induction electrode are arranged on same one deck.
14. according to the described capacitive touch screen of claim 13, it is characterized in that, the described scan electrode of each row comprises a plurality of sub-scan electrodes, and the sub-scan electrode of fine scanning electrode arranges a described induction electrode at first direction formation scan electrode row between per two scan electrodes row.
15., it is characterized in that after described scan drive circuit carried out scan operation to a scan electrode group, described touch detection circuit carried out read operation by group to each induction electrode group according to the described capacitive touch screen of claim 10.
16., it is characterized in that described scan drive circuit carries out after the scan operation all each induction electrode group is carried out also comprising after the read operation by group to each scan electrode group according to the described capacitive touch screen of claim 15:
The induced signal that reads is screened, obtain maximum induced signal, determined the lateral attitude of touch area by described maximum induced signal, the sweep signal corresponding with described maximum induced signal determined the lengthwise position of touch area, then determines the touch area according to described maximum induced signal and the sweep signal corresponding with described maximum induced signal.
17., it is characterized in that a scan electrode group comprises adjacent M line scanning electrode according to the described capacitive touch screen of claim 16, adjacent scan electrode group shares N line scanning electrode, 1≤N≤M-1 wherein, and described M, N are positive integer, and M 〉=2.
18., it is characterized in that an induction electrode group comprises adjacent P row induction electrode according to the described capacitive touch screen of claim 17, adjacent induction electrode group shares Q row induction electrode; 1≤Q≤P-1 wherein, described P, Q are positive integer, and P 〉=2.
19., it is characterized in that described M equates with P according to the described capacitive touch screen of claim 18.
20., it is characterized in that described M=P=2 or 3 or 4 or 5 or 6 according to the described capacitive touch screen of claim 19.
21., it is characterized in that described N=M-1 according to the described capacitive touch screen of claim 19.
22., it is characterized in that described Q=P-1 according to the described capacitive touch screen of claim 19.
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| CN103294292B (en) | 2016-12-14 |
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