CN105573551A - Capacitance type touch screen sensor - Google Patents
Capacitance type touch screen sensor Download PDFInfo
- Publication number
- CN105573551A CN105573551A CN201510934435.8A CN201510934435A CN105573551A CN 105573551 A CN105573551 A CN 105573551A CN 201510934435 A CN201510934435 A CN 201510934435A CN 105573551 A CN105573551 A CN 105573551A
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- China
- Prior art keywords
- hollow out
- electrode layer
- induction electrode
- hollowed
- electrode
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention discloses a capacitance type touch screen sensor. The capacitance type touch screen sensor comprises a sensing electrode layer and a driving electrode layer which are vertically stacked up and down, wherein the sensing electrode layer comprises a plurality of sensing electrodes in matrix type arrangement, each sensing electrode is rectangular, the middle part of each sensing electrode is provided with hollowed-out patterns, the hollowed-out patterns comprise a horizontal hollowed-out part and a vertical hollowed-out part which are vertical to each other and are crossed and also comprise inclined hollowed-out parts forming 45-degree inclined angles with the horizontal hollowed-out part and the vertical hollowed-out part respectively, and rectangular hollowed-out parts parallel to each inclined hollowed-out part are arranged above and below each inclined hollowed-out part respectively; the driving electrode layer comprises a plurality of driving electrodes in rectangular arrangement, and each driving electrode is rectangular; and the area of each sensing electrode is smaller than that of each driving electrode. The sensor disclosed by the invention adopts a double-layer mutual capacitance electrode structure, and each sensing electrode adopts the novel hollowed-out patterns, so that the sensitivity of the sensor is greatly improved, and the range of a high-sensitivity area is also enlarged.
Description
Technical field
The present invention relates to a kind of capacitive touch screen sensor.
Background technology
The ITO electrode matrix (i.e. drive electrode layer and induction electrode layer) of two-layer cross-distribution is had in the touch-screen of mutual capacitance induction, the electric field line of edge between electrode is mainly siphoned away during finger touch, cause mutual capacitance to reduce, and then calculate finger position by the position of Scanning Detction touch-screen capacitance variations.Because the electrode of capacitive touch screen sensor exists the not high problem of sensitivity in prior art, especially under the electromagnetism and electrostatic interference of the various electromagnetic interference (EMI) in the external world and electronic equipment internal, be difficult to correctly sense the position command touching finger, thus greatly have impact on the touch-control effect of touch screen.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of capacitive touch screen sensor, and the hollow out figure of each induction electrode employing of this sensor can improve the sensitivity of sensor greatly.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of capacitive touch screen sensor, comprises induction electrode layer and drive electrode layer, described induction electrode layer and the upper and lower vertical stacking of drive electrode layer, wherein, described induction electrode layer comprises the induction electrode of multiple arrangement in matrix form, each described induction electrode is rectangular, induction electrode along induction electrode layer lead-in wire direction is connected mutually, adjacent induction electrode along vertical induction electrode layer lead-in wire direction has the gap I of certain distance, hollow out figure is provided with in the middle part of each described induction electrode, described hollow out figure comprises mutually vertical in cross horizontal part hollow out and vertical portion hollow out, also comprise the rake hollow out with described horizontal part hollow out and the equal shape of vertical portion hollow out angle at 45 °, rectangle hollow out in parallel is equipped with above and below each rake hollow out, described drive electrode layer comprises the drive electrode of multiple arrangement in matrix form, each described drive electrode is rectangular, drive electrode along drive electrode layer lead-in wire direction is connected mutually, adjacent driven electrode along vertical drive electrode layer lead-in wire direction has the gap II of certain distance, and the area of described induction electrode is less than the area of described drive electrode.
Further preferably, each described induction electrode is in square, and its length of side can get 3 ~ 8mm; Each described drive electrode is in square, and its length of side is 3 ~ 8mm.
Further preferably, the width of described gap I is consistent with the width of described gap II.
Further preferably, the area of described hollow out figure is 0.3 ~ 0.5 of each induction electrode area, and the size of hollow out figure can not be excessive, and hollow out dimension of picture crosses the area reduction that conference causes upper and lower two-layer electrode just right, then upper and lower two-layer electric field between electrodes line is little, and the mutual capacitance change of touch is little; The too small meeting of hollow out dimension of picture causes hollow out fringe region to reduce, thus causes high sensitivity zone to reduce.
Further preferably, the distance of described top rectangle hollow out and described rake hollow out equals the distance of described below rectangle hollow out and described rake hollow out.
Beneficial effect: relative to prior art, sensor of the present invention adopts double-deck mutual capacitance electrode structure, and have employed novel hollow out figure in each induction electrode of this sensor, not only substantially increase the sensitivity of sensor, have also been enlarged the scope of high sensitivity zone, on touch-screen, each point all shows good sensitivity, is shown by the result of software emulation, highly sensitive 8.58% of the existing sensor of remolding sensitivity of sensor of the present invention.
Accompanying drawing explanation
Fig. 1 is the structural representation of rectangular electrode model;
Fig. 2 is the Δ C of rectangular electrode model
mtwo dimensional surface vertical view;
Fig. 3 is the structural representation of rhombus electrode model;
Fig. 4 is the Δ C of rhombus electrode model
mtwo dimensional surface vertical view;
Fig. 5 be drive electrode the same with induction electrode size time, induction electrode adopts the structural representation of cross hollow out pattern electrodes model;
Fig. 6 is the Δ C of Fig. 5 electrode model
mtwo dimensional surface vertical view;
Fig. 7 be drive electrode the same with induction electrode size time, induction electrode adopts the structural representation of rice font hollow out pattern electrodes model;
Fig. 8 is the Δ C of Fig. 7 electrode model
mtwo dimensional surface vertical view;
Fig. 9 be drive electrode the same with induction electrode size time, induction electrode adopts the structural representation of hollow out pattern electrodes model of the present invention;
Figure 10 is the Δ C of Fig. 9 electrode model
mtwo dimensional surface vertical view;
Figure 11 is induction electrode size when being less than drive electrode, and induction electrode adopts the structural representation of cross hollow out pattern electrodes model;
Figure 12 is the Δ C of Figure 11 electrode model
mtwo dimensional surface vertical view;
Figure 13 is induction electrode size when being less than drive electrode, and induction electrode adopts the structural representation of rice font hollow out pattern electrodes model;
Figure 14 is the Δ C of Figure 13 electrode model
mtwo dimensional surface vertical view;
Figure 15 is induction electrode size when being less than drive electrode, and induction electrode adopts the structural representation of hollow out pattern electrodes model of the present invention;
Figure 16 is the Δ C of Figure 15 electrode model
mtwo dimensional surface vertical view;
Figure 17 is the structural representation of drive electrode layer in sensor of the present invention;
Figure 18 is the structural representation of induction electrode layer in sensor of the present invention;
Figure 19 is the structural representation in sensor of the present invention after induction electrode layer and drive electrode layer vertical stacking;
Figure 20 is the stacking figure of geometric model adopted when utilizing simulation software to study;
Figure 21 is the Rhombus electrode structure schematic diagram utilizing simulation software to study;
Figure 22 is the Δ C of Figure 21 rhombus electrode model
mthree-dimensional plot.
Embodiment
According to following embodiment, the present invention may be better understood.But those skilled in the art will readily understand, the content described by embodiment only for illustration of the present invention, and should can not limit the present invention described in detail in claims yet.
As shown in Figure 17 ~ 19, capacitive touch screen sensor of the present invention, comprise induction electrode layer 1 and drive electrode layer 2, induction electrode layer 1 and drive electrode layer 2 are ITO (indium tin oxide transparent conductive semiconductor film) electrode matrix, induction electrode layer 1 and drive electrode layer about 2 square crossing stacking, wherein, induction electrode layer 1 comprises the induction electrode 3 of multiple arrangement in matrix form, and each induction electrode 3 is in square, and its length of side is 3.2mm, mutually connect along the go between induction electrode 3 in 14 directions of induction electrode layer, the connecting portion of adjacent induction electrode 3 is wide 0.5mm, the rectangle 10 of long 0.8mm, along the go between adjacent induction electrode 3 in 14 directions of vertical induction electrode layer, there is the gap I17 of certain distance, the width of gap I17 is 0.5mm, hollow out figure 4 is provided with in the middle part of each induction electrode 3, hollow out figure 4 comprises mutually vertical in cross horizontal part hollow out 5 and vertical portion hollow out 6, horizontal part hollow out 5 and vertical portion hollow out 6 are long 2.4mm, the rectangle hollow out of wide 0.5mm, also comprise the rake hollow out 7 with horizontal part hollow out 5 and the equal shape angle at 45 ° of vertical portion hollow out 6, rake hollow out 7 is long is 0.95mm, wide is 0.28mm, rectangle hollow out 8 in parallel is equipped with above and below each rake hollow out 7, rectangle hollow out 8 is long is 0.71mm (calculating by long limit), wide is 0.16mm, the distance of top rectangle hollow out and rake hollow out 7 equals the distance of below rectangle hollow out and rake hollow out 7, drive electrode layer 2 comprises the drive electrode 9 of multiple arrangement in matrix form, each drive electrode is in square, its length of side is 3.5mm, mutually connect along the go between drive electrode 9 in 15 directions of drive electrode layer, the connecting portion of adjacent driven electrode 9 is the square 11 of length of side 0.5mm, have the gap II16 of certain distance along the go between adjacent driven electrode 9 in 15 directions of vertical drive electrode layer, the width of gap II16 is 0.5mm.
Table 1 ~ table 3 is the simulation result of each electrode model.
Table 1: rectangle and rhombus electrode simulation result as follows:
Table 2: drive electrode is the same with the area of induction electrode large, only change the shape of openwork part fringe region in the middle part of induction electrode, the simulation result obtained is as follows:
Table 3: the size reducing induction electrode, the size of induction electrode (area) is made to be less than drive electrode, increase electrode exterior fringe region, ensure that the right opposite of three electrode models is long-pending all equal simultaneously, only change the shape of openwork part fringe region in the middle part of induction electrode, fringe region increases gradually, and the simulation result obtained is as follows:
From table 1 ~ table 2, when drive electrode the same with the size of induction electrode large time, only change the shape in hollow out pattern edge region in the middle part of induction electrode, fringe region increases successively, transducer sensitivity adds 2.705% than rhombus electrode model respectively, 3.7%, 5.128%, but there is the problem that large area region sensitivity is all bad, from table 1 ~ table 3, when reducing the size of induction electrode, the size of induction electrode (area) is made to be less than drive electrode, large-scale high sensitivity zone and amplitude sensitivity can be obtained, the transducer sensitivity that the hollow out figure adopted in conjunction with the present invention again obtains adds 8.58% than rhombus electrode model, sensitivity improves greatly.
Transducer sensitivity=touch signal/finger threshold value, finger threshold value is the definite value set, therefore the touch signal Δ C of certain point
mvalue can be used for characterizing the sensitivity of this point.Δ C
meach Δ C in two dimensional surface vertical view
mthe corresponding corresponding color of value, Δ C
mtwo dimensional surface vertical view by mutual capacitance change corresponding color after touch each on touch-screen, can find out each Δ C on touch-screen
mvalue size, and then draw Δ C in touch-screen
mthe position that value is put preferably, obtains the scope of touch-screen high sensitivity zone (black).
From Δ C
mtwo dimensional surface vertical view can be found out: the black of color bar from the white of least significant end to the top on the right, its Δ C
mvalue is increasing, and the Δ C that major part point is corresponding is described when figure presents large area black region
mvalue all fine, touch-screen Δ C
mvalue and its sensitivity have relation closely, Δ C
mbe worth larger, illustrate sensitivity better (touch-screen be by detect touch time mutual capacitance change region judge the position pointed, and then sense touch instruction.As touch point Δ C
mwhen being worth larger, namely touch signal is larger, and sensitivity is also corresponding higher), so illustrate that this sensor has large-scale high sensitivity zone when figure presents large area black region.
The present invention adopts ComsolMultiphysics5.1 software to emulate electrode pattern, probes into from common rectangle and rhombus electrode to electrode model of the present invention.The geometric model of research is as shown in figure 20 stacking, getting radius is long Al pen (aluminium pen) simulated touch for 1.5mm of 0.4mm, emulation touch plate dimensions all gets 8.5mm, for rhombus electrode (as shown in figure 21), the long 2mm of bridge, the wide 1mm of bridge, as shown in figure 21, each position is measured from 0.5mm to 8mm every 0.5mm successively by horizontal and vertical respectively for Al pen, have 16 × 16 positions, namely be placed on 256 position duplicate measurementss, can obtain the value of each point of each model, the 3D result of each point value of rhombus electrode as shown in figure 22.
From rhombus electrode Δ C
mthree-dimensional plot can be found out, shown in Figure 22, and Δ C
mvalue size distribution, as hill height, is worth relatively large local projection, is worth little place depression and goes down.In conjunction with color bar, the region that namely color bar upper end color (black) is corresponding and Δ C
mbe worth large region, because the model pattern of research is all rectangle inside hollow outs in a similar manner, Δ C
mthree-dimensional plot is all maximum at peak fractions, then has a down dip so that certain slope is past.The a little middle Δ C of institute
mthe maximum value (amplitude) of value can be used for characterizing the sensitivity of whole touch-screen to a certain extent.
Claims (4)
1. a capacitive touch screen sensor, is characterized in that: comprise induction electrode layer and drive electrode layer, described induction electrode layer and the upper and lower vertical stacking of drive electrode layer, wherein, described induction electrode layer comprises the induction electrode of multiple arrangement in matrix form, each described induction electrode is rectangular, induction electrode along induction electrode layer lead-in wire direction is connected mutually, adjacent induction electrode along vertical induction electrode layer lead-in wire direction has the gap I of certain distance, hollow out figure is provided with in the middle part of each described induction electrode, described hollow out figure comprises mutually vertical in cross horizontal part hollow out and vertical portion hollow out, also comprise the rake hollow out with described horizontal part hollow out and the equal shape of vertical portion hollow out angle at 45 °, rectangle hollow out in parallel is equipped with above and below each rake hollow out, described drive electrode layer comprises the drive electrode of multiple arrangement in matrix form, each described drive electrode is rectangular, drive electrode along drive electrode layer lead-in wire direction is connected mutually, adjacent driven electrode along vertical drive electrode layer lead-in wire direction has the gap II of certain distance, and the area of described induction electrode is less than the area of described drive electrode.
2. capacitive touch screen sensor according to claim 1, is characterized in that: the size of described gap I and the consistent size of described gap II.
3. capacitive touch screen sensor according to claim 1, is characterized in that: the area of described hollow out figure is 0.3 ~ 0.5 of each induction electrode area.
4. capacitive touch screen sensor according to claim 1, is characterized in that: the distance of described top rectangle hollow out and described rake hollow out equals the distance of described below rectangle hollow out and described rake hollow out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510934435.8A CN105573551A (en) | 2015-12-15 | 2015-12-15 | Capacitance type touch screen sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510934435.8A CN105573551A (en) | 2015-12-15 | 2015-12-15 | Capacitance type touch screen sensor |
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| Publication Number | Publication Date |
|---|---|
| CN105573551A true CN105573551A (en) | 2016-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510934435.8A Pending CN105573551A (en) | 2015-12-15 | 2015-12-15 | Capacitance type touch screen sensor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106227382A (en) * | 2016-07-22 | 2016-12-14 | 友达光电（苏州）有限公司 | Contactor control device |
| CN106325641A (en) * | 2016-08-29 | 2017-01-11 | 红河以恒科技集团有限公司 | Touch electrode structure, touch panel and touch display |
| TWI679572B (en) * | 2018-08-02 | 2019-12-11 | 大陸商北京集創北方科技股份有限公司 | Touch electrode pattern and touch display device using the same |
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| US20150077650A1 (en) * | 2013-09-13 | 2015-03-19 | Boe Technology Group Co., Ltd. | Touch screen and manufacturing method thereof, display device |
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Patent Citations (7)
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| CN102662544A (en) * | 2012-03-31 | 2012-09-12 | 苏州瀚瑞微电子有限公司 | Double-layer ITO (indium tin oxide) wire arrangement structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106227382A (en) * | 2016-07-22 | 2016-12-14 | 友达光电（苏州）有限公司 | Contactor control device |
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| CN106325641A (en) * | 2016-08-29 | 2017-01-11 | 红河以恒科技集团有限公司 | Touch electrode structure, touch panel and touch display |
| TWI679572B (en) * | 2018-08-02 | 2019-12-11 | 大陸商北京集創北方科技股份有限公司 | Touch electrode pattern and touch display device using the same |
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Application publication date: 20160511 |
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