CN201673493U - Inductive touch sensor - Google Patents
Inductive touch sensor Download PDFInfo
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- CN201673493U CN201673493U CN2010202111472U CN201020211147U CN201673493U CN 201673493 U CN201673493 U CN 201673493U CN 2010202111472 U CN2010202111472 U CN 2010202111472U CN 201020211147 U CN201020211147 U CN 201020211147U CN 201673493 U CN201673493 U CN 201673493U
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Abstract
The utility model discloses an inductive touch sensor which can detect the touch positions of both inductive objects and insulating objects, and has higher accuracy and sensitivity simultaneously. The inductive touch sensor comprises a driving layer, an inducting layer and an inductance circuit, wherein the driving layer is used for generating a magnetic filed, the inducting layer is distributed at one side of the driving layer and used for generating inductance change, and the inductance circuit is connected with the driving layer and the inducting layer, and utilizes the inductance change caused by the inducting layer for detecting the position of the touch point.
Description
Technical field
The utility model relates to a kind of touch sensing, particularly relates to a kind of touch sensing that adopts inductance principle of induction detecting touch location.
Background technology
At present, touch technology has been widely used in routine work and life, for example the roller of the track pad of ATM (Automatic Teller Machine) (ATM), notebook computer, amusement player.Touch sensing will be detected the motion of the object of finger or pointer and so on the touch sensing surface, and convert it into electric signal and be used for subsequent treatment.
The touch-control sensing principle mainly contains resistance-type, condenser type, sound wave type, optical profile type or the like.Wherein, the electric resistance touch-control sensor comprises two-layer continuous resistive film, and this two-layer resistive film is stacked mutually, and is spaced apart with the insulation dot interlace.When touch object touched the touch sensing surface, the two-layer resistive film of touch location was in contact with one another, and then produced the electric current variation.Touch sensing calculates touch location according to this.But, can not distinguish a plurality of touch locations simultaneously.
The capacitance touching control sensor is divided into projected capacitive and surface capacitance type, and wherein, the projected capacitive touch sensor has the grid electrode figure, and the surface capacitance type touch sensing comprises that a marginal distribution has the continuous conduction film of electrode.Work as conductive body, for example metal object or human body, during near the touch sensing surface, the electrode of touch location or conducting film produce capacitance variations, and touch sensing calculates touch location according to this.Yet the touch of insulating bodies can not be detected.
The sound wave type touch sensing comprises sound wave emissions element and receiving element, and the sound wave that radiated element is produced is propagated on the touch sensing surface.Touch control object is known from experience the acoustic wave energy that stops and absorb touch location, produces signal and changes, and touch sensing calculates touch location according to this.The principle of work of optical touch control sensor and sound wave type touch sensing are similar, just replace sound wave to do detecting medium, for example infrared ray with light wave.These two kinds of touch sensings all need to install the emission and the receiving element of corresponding ripple, and any dirty or defective that occurs on the propagation surface of sensor, all can influence the susceptibility of touch sensing, even cause the inefficacy of touch sensing.
In sum, the precision of electric resistance touch-control sensor detecting touch location is not high, especially can not realize detecting simultaneously a plurality of touch locations; And the capacitance touching control sensor only can be detected the touch location of conductive body.In addition, sound wave type and optical touch control sensor are had relatively high expectations to the smooth finish and the operating environment of touch-surface, need periodic maintenance and correction.
The utility model content
In view of this, be necessary to provide a kind of inductance type touch sensing, can detect conductive body and also can detect the touch location of insulating bodies on touch sensing, have higher precision and sensitivity simultaneously.
A kind of inductance type touch sensing, it is characterized in that, comprise the Drive Layer that is used to produce magnetic field, be laid in the inductive layer that is used to produce the inductance variation of described Drive Layer one side, and the inductive circuit that connects described Drive Layer and described inductive layer, the inductance that described inductive circuit utilizes described inductive layer to produce changes detecting position, touch point.
Adopt above-mentioned inductance type touch sensing, can detect the position, touch point of conductive body and insulating bodies, overcome the above-mentioned shortcoming of utilizing the touch sensing of other touch-control sensing principles simultaneously.Therefore, whether when utilizing inductance principle detecting touch location, not needing to limit touch object is conductor, and detecting precision and remolding sensitivity are higher, requires also not strict to the cleanliness of environment.
Description of drawings
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail.
Fig. 1 is the principle schematic that produces inductance between two leads.
The side schematic view of first embodiment of the inductance type touch sensing that Fig. 2 a provides for the utility model.
Fig. 2 b is the planar structure synoptic diagram of Fig. 2 a.
Fig. 3 is the principle of work synoptic diagram of the inductance type touch sensing of first embodiment shown in Fig. 2 a, the 2b.
Fig. 4 a, 4b, 4c are the side schematic view of other three kinds of fit of first embodiment.
The planar structure synoptic diagram of second embodiment of the inductance type touch sensing that Fig. 5 provides for the utility model.
The planar structure synoptic diagram of the 3rd embodiment of the inductance type touch sensing that Fig. 6 provides for the utility model.
The side schematic view of the 4th embodiment of the inductance type touch sensing that Fig. 7 a provides for the utility model.
Fig. 7 b is the planar structure synoptic diagram of Fig. 7 a.
The planar structure synoptic diagram of the 5th embodiment of the inductance type touch sensing that Fig. 8 provides for the utility model.
The side schematic view of the 6th embodiment of the inductance type touch sensing that Fig. 9 a provides for the utility model.
Fig. 9 b is the planar structure synoptic diagram of Fig. 9 a.
Embodiment
As everyone knows, when electric current passes through conductor, can produce magnetic field around this conductor.The magnetic field intensity that this conductor produces is by the geometric configuration of this conductor and the size decision by strength of current.When this conductor, produced inductance as another conductor by the magnetic field excitation around this conductor.As shown in Figure 1, lead 1 and lead 2 are close mutually, and electric current 4 makes lead 2 produce magnetic field 3 on every side by lead 2.At this moment, lead 1 just places magnetic field 3, is encouraged by magnetic field 3 and produces inductance.The inductance size depends on that the distance between two leads waits other parameters, that is to say, if the distance between two leads changes, then inductance changes.This inductance variation shows as electric signal 5 and exports.This electric signal can be a current signal, also can be voltage signal etc.Therefore, the detecting inductance changes, and just can be used to determine to cause the touch point position of variable in distance.The inductance type touch sensing that the utility model provides utilizes above-mentioned principle of work and produces.
Be depicted as the inductance type touch sensing of the utility model first embodiment as Fig. 2 a and 2b.Inductance type touch sensing 100 comprises Drive Layer 110, inductive layer 120 and inductive circuit 130.Wherein, Drive Layer 110 comprises drive electrode 111 and the driving substrate 112 that is used to carry drive electrode 111, and inductive layer 120 comprises induction electrode 121 and is used to carry the induction substrate 122 of induction electrode 121.Inductive circuit 130 comprises driving lead 131, sensor wire 132 and processor 133.Drive lead 131 and in driving substrate, extend, and connect drive electrode 111 to processor 133 along first direction; Simultaneously, sensor wire 132 extends along second direction in the induction substrate, and connects induction electrode 121 to processor 133.First direction and second direction vertical setting mutually.For drive electrode 111 and induction electrode 121 are not in contact with one another, can separate with insulating medium (figure does not show) between the two, to keep certain distance, this insulating medium can be the continuous insulation layer, also can be a plurality of insulation dot interlaces.The material of this insulating medium can be selected deformable insulating material, and for example ambroin, the liquid colloidal sol of insulativity etc. also can be air.
As shown in Figure 3, drive electrode 111a, 111b and 111c are distributed in and drive on the lead 131a; Drive electrode 111d, 111e and 111f are distributed in and drive on the lead 131b; Drive electrode 111g, 111h and 111i are distributed in and drive on the lead 131c.Simultaneously, induction electrode 121a, 121d, 121g are distributed on the sensor wire 132a; Induction electrode 121b, 121e, 121h are distributed on the sensor wire 132b; Induction electrode 121c, 121f, 121i are distributed on the sensor wire 132c.Every drives lead 131a, 131b, 131c successively by drive current, detects sensor wire 132a, 132b, 132c simultaneously.For example, when driving lead 131a by drive current, produce magnetic field around drive electrode 111a, 111b, the 111c, excitation induction electrode 131a, 121b, 121c produce inductance.If drive electrode 111a is touched, then drive electrode 111a is close to induction electrode 121a, and then the distance that drives between electrode 111a and the induction electrode 121a reduces, and causes that the inductance that induction electrode 121a produces changes.This inductance changes and will be detected when detecting sensor wire 132a, and exports processor 133 to.Therefore, processor 133 calculates the correspondence position of touch point according to driving lead 131a and the position of sensor wire 132a on the inductance type touch sensing.
In the inductance type touch sensing 100 of above-mentioned first embodiment, the quantity of illustrated drive electrode 111 and induction electrode 121 is respectively 9, but can be respectively at least one drive electrode and at least one induction electrode in the practical application.In like manner, the quantity of illustrated driving lead 131 and sensor wire 132 is respectively 3, drives lead and at least one sensor wire but can be respectively at least one in the practical application.Simultaneously, the second direction that first direction that driving lead 131 extends and sensor wire 132 extend is not limited to vertical mutually, as long as first direction and second direction cross-cutting distribution.
The inductance type touch sensing 200 of the utility model second embodiment as shown in Figure 5.Inductance type touch sensing 200 comprises Drive Layer 210, inductive layer 220 and inductive circuit 230.Wherein, Drive Layer 210 comprises drive electrode 211 and the driving substrate 212 that is used to carry drive electrode 211.Inductive layer 220 comprises induction electrode 221 and is used to carry the induction substrate 222 of induction electrode 221.Inductive circuit 230 comprises driving lead 231, sensor wire 232 and processor 233.Driving lead 231 is starting point with any a jiao of driving substrate 212 inside surfaces, extends at driving substrate 212 inside surface upper edge different directions, to cover whole driving substrate 212 inside surfaces, simultaneously, drives lead 231 and connects drive electrodes 211 to processor 233.Sensor wire 232 extends to form isocentric circular arc on induction substrate 222 inside surfaces, to cover whole induction substrate 222, sensor wire 232 connects induction electrode 211 to processor 233 simultaneously.The touch point method for detecting of second embodiment is with first embodiment.In view of driving lead 231 and sensor wire 232 distribution modes, the position, touch point calculates by polar coordinates, and these polar coordinates are by the arc radius definition of angle that drives lead 231 and sensor wire 232.
In the inductance type touch sensing 200 of above-mentioned second embodiment, the quantity of illustrated drive electrode 211 and induction electrode 221 is respectively 13, but can be respectively at least one drive electrode and at least one induction electrode in the practical application.In like manner, the quantity of illustrated driving lead 231 and sensor wire 232 is respectively 3 and 5, drives lead and at least one sensor wire but can be respectively at least one in the practical application.
The extension starting point that drives lead 231 is not limited to a jiao of driving substrate 212 inside surfaces, can be on driving substrate 212 inside surfaces more arbitrarily.For example, with similar the 3rd embodiment of above-mentioned second embodiment, the utilization polar coordinates calculate the touch point, the extension starting point that drives lead is positioned at the center of driving substrate inside surface, as shown in Figure 6, wherein, inductance type touch sensing 300 comprises Drive Layer 310, inductive layer 320 and inductive circuit 330.Drive Layer 310 comprises drive electrode 311 (is example with 20 drive electrodes) and the driving substrate 312 that is used to carry drive electrode 311, and inductive layer 320 comprises induction electrode 321 (is example with 20 induction electrodes) and is used to carry the induction substrate 322 of induction electrode 321.Inductive circuit 330 comprises driving lead 331 (driving leads with 4 is example), sensor wire 332 (driving leads with 3 is example) and processor 333.Different with second embodiment, drive lead 331 and extend, and all intersect in the center of driving substrate 312 inside surfaces at driving substrate 312 inside surface upper edge different directions.At the infall of above-mentioned driving lead 331, be provided with a plurality of insulating trips 340, be used to make every to drive mutually insulated between the lead 331.Simultaneously, sensor wire 332 is that round dot forms concentric circles with the center of responding to substrate 322 inside surfaces on induction substrate 322 inside surfaces.The connected mode of other elements is with first embodiment.
In the inductance type touch sensing 300 of above-mentioned the 3rd embodiment, the quantity of illustrated drive electrode 311 and induction electrode 321 is respectively 20, but can be respectively at least one drive electrode and at least one induction electrode in the practical application.In like manner, the quantity of illustrated driving lead 331 and sensor wire 332 is respectively 4 and 3, drives lead and at least one sensor wire but can be respectively at least one in the practical application.
In like manner, drive lead can concentric circles or the form of isocentric circular arc distribute, simultaneously, sensor wire extends along different directions, and induction substrate inside surface arbitrarily some place intersect.Therefore, driving lead and sensor wire and be not limited to straight line, can be camber line etc.
In the above embodiment, be used to calculate the position, touch point simultaneously along the driving lead of first direction distribution and the sensor wire that distributes along second direction.Yet, if drive electrode is the plane continuous structure, being used for driving generation magnetic field, induction electrode will be divided into two groups of induction electrodes of different directions, to determine the position, touch point.
Shown in Fig. 7 a and 7b, be the inductance type touch sensing of the utility model the 4th embodiment.Inductance type touch sensing 400 comprises Drive Layer 410, inductive layer 420 and inductive circuit 430.Drive Layer 410 comprises drive electrode 411 and the driving substrate 412 that is used to carry drive electrode 411, and wherein drive electrode 411 is the plane continuous structure.Inductive layer 420 comprises induction substrate 422, is distributed in first induction electrode 421 (is example with 9 first induction electrodes) of induction substrate 422 inside surfaces and is distributed in second induction electrode 423 (is example with 9 second induction electrodes) of responding to substrate 422 outside surfaces.Inductive circuit 430 comprises processor 433, drives lead 431, first sensor wire 432 (is example with 3 first sensor wires) and second sensor wire 434 (is example with 3 second sensor wires).Drive lead 431 and connect drive electrode 411 to processor 433, so that drive current to be provided.First sensor wire 432 connects first induction electrode 421 to processor 433 at induction substrate 422 inside surface upper edge first directions, simultaneously, second sensor wire 434 connects second induction electrode 423 to processor 433 in induction substrate 422 outside surface upper edge second directions.This first direction and the vertical setting mutually of this second direction.
When drive current passes through drive electrode 411, produce magnetic field around the inductive layer 420, cause that first induction electrode 421 and 423 generations of second induction electrode produce inductance respectively.If driving substrate 412 outside surfaces are touched, then at the place, touch point, the distance between the drive electrode 411 and first induction electrode 421 will reduce, and cause that the inductance that first induction electrode 421 produces changes.Processor 433 receives the electric signal that this inductance changes, to calculate the position of touch point at first direction.Simultaneously, drive electrode 411 and the distance between second induction electrode 423 of induction substrate 422 outside surfaces also can reduce.In like manner, processor 433 can calculate the position of touch point in second direction.
In the inductance type touch sensing 400 of above-mentioned the 4th embodiment, the quantity of illustrated first induction electrode 421 and second induction electrode 423 is respectively 9, but can be respectively at least one first induction electrode and at least one second induction electrode in the practical application.In like manner, the quantity of illustrated first sensor wire 432 and second sensor wire 434 is respectively 3, but can be respectively at least one the first sensor wires and at least one the second sensor wires in the practical application.Simultaneously, the second direction of first direction that first sensor wire 432 extends and 434 extensions of second sensor wire is not limited to vertical mutually, as long as first direction and second party cross-cutting distribution.
Be distributed in first induction electrode on induction substrate two sides and the same one side that second induction electrode also can be distributed in the induction substrate simultaneously.As shown in Figure 8, similar with above-mentioned the 4th embodiment, the inductance type touch sensing 500 of the 5th embodiment comprises the Drive Layer 510 with plane continuous drive electrode 511 and driving substrate 512, inductive layer 520 and the inductive circuit 530 with first induction electrode 521 (is example with 9 first induction electrodes), second induction electrode 523 (is example with 9 second induction electrodes) and induction substrate 522.Wherein, first induction electrode 521 and second induction electrode 523 all are distributed in the inside surface of induction substrate 522.Inductive circuit 530 comprises driving lead 531, first sensor wire 532 (is example with 3 first sensor wires), second sensor wire (is example with 3 second sensor wires) 534 and processor 533.First sensor wire 532 connects first induction electrode 521 to processor 533 along first direction in induction substrate 522, simultaneously, second sensor wire 534 connects second induction electrode 523 to processor 533 along second direction in induction substrate 522, and first sensor wire 532 is vertical mutually on induction substrate 522 inside surfaces with second sensor wire 534.For making first sensor wire 532 and second sensor wire, 534 mutually insulateds, at both infalls insulating trip 540 is set, it is clipped between first sensor wire 532 and second sensor wire 534.The touch point method for detecting is with above-mentioned the 4th embodiment.
In the inductance type touch sensing 500 of above-mentioned the 5th embodiment, the quantity of illustrated first induction electrode 521 and second induction electrode 523 is respectively 9, but can be respectively at least one first induction electrode and at least one second induction electrode in the practical application.In like manner, the quantity of illustrated first sensor wire 532 and second sensor wire 534 is respectively 3, but can be respectively at least one the first sensor wires and at least one the second sensor wires in the practical application.Simultaneously, the second direction of first direction that first sensor wire 532 extends and 534 extensions of second sensor wire is not limited to vertical mutually, as long as first direction and second direction cross-cutting distribution.
First sensor wire and second sensor wire in above-mentioned the 4th embodiment and the 5th embodiment can adopt the distribution mode that drives the sensor wire of lead in second embodiment and the 3rd embodiment, calculate the position, touch point to utilize polar coordinates.
In the above-mentioned embodiment, the touch point is to calculate by electrode that is distributed in two different directions and lead.If each electrode can define a unique coordinate position alone, the electrode that then only needs one deck to be used to locate can be determined the position, touch point.Shown in Fig. 9 a and 9b, the inductance type touch sensing 600 of the utility model the 6th embodiment comprises Drive Layer 610 respect to one another and inductive layer 620, and inductive circuit 630.Drive Layer 610 comprises plane continuous drive electrode 611 and driving substrate 612; Inductive layer 620 comprises induction electrode 621 (is example with 9 induction electrodes) and induction substrate 622; Inductive circuit 630 comprises driving lead 631, sensor wire 632 and processor 633.Drive electrode 611 is connected to processor 633 by driving lead 631, and each induction electrode 621 then is connected to processor 633 by sensor wire 632 independently of one another.
Similar with above-mentioned embodiment, the magnetic field that drive electrode 611 produces causes on the induction electrode 621 and produces inductance, the inductance that the corresponding induction electrode 621 that touch causes produces changes, and the sensor wire 632 that is connected by corresponding induction electrode 621 exports processor 633 to, to calculate the position, touch point.Because each induction electrode 621 is connected to processor 633 independently of one another, thus each independently induction electrode 621 can directly define unique position.Therefore, the position, touch point can directly be determined by the position of the induction electrode 621 that produces the inductance variation.
In the inductance type touch sensing 600 of above-mentioned the 6th embodiment, the quantity of illustrated induction electrode 621 is 9, but can be at least one induction electrode in the practical application.The quantity of sensor wire 632 is the quantity of induction electrode 621 together, and be not in contact with one another each other.
In the inductance type touch sensing that the utility model provides, drive electrode and induction electrode are not in contact with one another, and can separate with insulating medium (figure does not show) between the two, to keep certain distance, this insulating medium can be the continuous insulation layer, also can be a plurality of insulation dot interlaces.The material of this insulating medium can be selected deformable insulating material, and for example ambroin, the liquid colloidal sol of insulativity etc. also can be air.In addition, drive electrode can be distributed in the inside surface of driving substrate, also can be distributed in the outside surface of driving substrate; In like manner, induction electrode can be distributed in the inside surface of induction substrate, also can be distributed in the outside surface of induction substrate, even can be distributed in the surfaces externally and internally of induction substrate simultaneously.If drive electrode is distributed in the outside surface of driving substrate, or induction electrode is distributed in the outside surface of induction substrate, and then this drive electrode or this induction electrode surface are provided with at least one protective seam, are scratched to prevent electrode.
Under different operational scenario, the outside surface of Drive Layer or the outside surface of inductive layer may be used to touch, so that the distance between drive electrode and the induction electrode changes.
The inductance type touch sensing that the utility model provides in distinct device in conjunction with the time, can make by transparent material, for example apply to the Touch Screen of display; Also can make, for example apply to the Trackpad of notebook computer by opaque material.Rely on inductance type touch-control sensing principle, conductive body and insulating bodies can both accurately be detected the position, touch point delicately under various environment.
Drive electrode and induction electrode comprise at least one electrode separately in the utility model.The number of drive electrode and induction electrode is mainly determined by the size and the resolution of inductance type touch sensing.Usually, resolution requires high more, or dimensional requirement is big more, and then electrode number is also many more.Drive of the number decision of the number of lead and sensor wire by drive electrode and induction electrode.In addition, the number of inductive circuit needs decision by actual design.
More than, it only is the utility model preferred embodiment, so can not limit scope of the present utility model with this, i.e. the equivalence of doing according to the utility model claim and description changes and modifies, and all should still belong in the scope that the utility model patent contains.
Claims (18)
1. inductance type touch sensing, it is characterized in that, described inductance type touch sensing comprises: the Drive Layer that is used to produce magnetic field, be laid in the inductive layer that being used for when described inductance type touch sensing is touched, producing the inductance variation in the described magnetic field, and the inductive circuit that connects described Drive Layer and described inductive layer, the inductance that described inductive circuit utilizes described inductive layer to produce changes detecting position, touch point.
2. inductance type touch sensing according to claim 1 is characterized in that described Drive Layer is positioned at a side of described inductive layer.
3. inductance type touch sensing according to claim 1 is characterized in that, described inductive layer comprises at least one induction electrode and is used to carry the induction substrate of described induction electrode.
4. inductance type touch sensing according to claim 3 is characterized in that, described Drive Layer comprises at least one drive electrode and the driving substrate that is used to carry described drive electrode.
5. inductance type touch sensing according to claim 4, it is characterized in that, described inductive circuit comprises: processor is used to connect the driving lead of described drive electrode to described processor, and is used to connect the sensor wire of described induction electrode to described processor.
6. inductance type touch sensing according to claim 5 is characterized in that, described driving lead distributes along first direction, and described sensor wire distributes along second direction.
7. inductance type touch sensing according to claim 5, it is characterized in that, described driving lead extends along different directions, described sensor wire forms concentric circles, the intersection point of described driving lead is positioned at described driving substrate surface, the center of circle of described sensor wire is positioned at described induction substrate surface, and described intersection point is corresponding mutually with the described center of circle.
8. inductance type touch sensing according to claim 7 is characterized in that described concentric circles comprises isocentric circular arc.
9. inductance type touch sensing according to claim 7 is characterized in that, the intersection point place of described driving lead is laid with and is used to make the described driving lead insulating trip of mutually insulated each other.
10. inductance type touch sensing according to claim 5, it is characterized in that, described sensor wire extends along different directions, described driving lead forms concentric circles, the intersection point of described sensor wire is positioned at described induction substrate surface, the center of circle of described driving lead is positioned at described driving substrate surface, and described intersection point is corresponding mutually with the described center of circle.
11. inductance type touch sensing according to claim 10 is characterized in that described concentric circles comprises isocentric circular arc.
12. inductance type touch sensing according to claim 10 is characterized in that, the intersection point place of described sensor wire is laid with and is used to make the described sensor wire insulating trip of mutually insulated each other.
13. inductance type touch sensing according to claim 5 is characterized in that described induction electrode is connected to described processor by described sensor wire independently of one another.
14. inductance type touch sensing according to claim 5 is characterized in that, described induction electrode comprises first induction electrode and second induction electrode.
15. inductance type touch sensing according to claim 14, it is characterized in that, described sensor wire comprises and is used to connect first sensor wire of described first induction electrode to described processor, and is used to be connected second sensor wire of described second induction electrode to described processor.
16. inductance type touch sensing according to claim 15 is characterized in that described first sensor wire is distributed in the inside surface of described induction substrate, described second sensor wire is distributed in the outside surface of described induction substrate.
17. inductance type touch sensing according to claim 15, it is characterized in that, described inductive layer comprises that insulating trip is laid in the infall of described first sensor wire and described second sensor wire, and is clipped between described first sensor wire and described second sensor wire.
18. inductance type touch sensing according to claim 1 is characterized in that, separates with insulating medium between described Drive Layer and the described inductive layer.
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| CN2010202111472U CN201673493U (en) | 2010-05-21 | 2010-05-21 | Inductive touch sensor |
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| CN2010202111472U CN201673493U (en) | 2010-05-21 | 2010-05-21 | Inductive touch sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011147109A1 (en) * | 2010-05-21 | 2011-12-01 | Tpk Touch Solutions (Xiamen) Inc. | Inductive touch sensor and detecting method |
| CN103902132A (en) * | 2014-03-20 | 2014-07-02 | 京东方科技集团股份有限公司 | Inductance-type touch screen, display panel and display device |
-
2010
- 2010-05-21 CN CN2010202111472U patent/CN201673493U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011147109A1 (en) * | 2010-05-21 | 2011-12-01 | Tpk Touch Solutions (Xiamen) Inc. | Inductive touch sensor and detecting method |
| CN103902132A (en) * | 2014-03-20 | 2014-07-02 | 京东方科技集团股份有限公司 | Inductance-type touch screen, display panel and display device |
| US9696844B2 (en) | 2014-03-20 | 2017-07-04 | Boe Technology Group Co., Ltd. | Inductive touch screen, display panel and display apparatus |
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Granted publication date: 20101215 Termination date: 20180521 |