CN101582002B - Capacitive touch screen - Google Patents
Capacitive touch screen Download PDFInfo
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- CN101582002B CN101582002B CN2008100672696A CN200810067269A CN101582002B CN 101582002 B CN101582002 B CN 101582002B CN 2008100672696 A CN2008100672696 A CN 2008100672696A CN 200810067269 A CN200810067269 A CN 200810067269A CN 101582002 B CN101582002 B CN 101582002B
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- sense line
- touch screen
- capacitive touch
- capacitance
- inductance
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Abstract
The present invention provides a capacitive touch screen, comprising a first sense wire and at least one second sense wire. A plurality of cross points are formed in such a way that the first sense wire is crossed with at least one second sense wire in an insulating mode, wherein overlapping areas of the cross points are different, thus forming a plurality of mutual inductances with different size. The capacitive touch screen has the advantages of less number of lead wires, simple drive of scanning and low power consumption.
Description
Technical field
The present invention relates to a kind of capacitive touch screen.
Background technology
Capacitive touch screen has been widely used as the control device of computer system.Traditional capacitive touch screen is by the sense line of matrix form configuration, and measures the capacitance change on any two sense line crossover locations, judges that finger or conductor touch the position coordinates of this capacitive touch screen.
See also Fig. 1, Fig. 1 is the planar structure synoptic diagram of prior art capacitive touch screen.This capacitive touch screen 1 comprise many first sense lines 11 and with these many first many second sense lines 12 that sense line is relative, wherein an insulation course (not shown) at interval in this first sense line 11 and this second sense line 12.
When user's finger during near this capacitive touch screen 1, human finger can make the capacitance between this first sense line 11 and this second sense line 12 change, outside circuit for detecting scans this first sense line 11 in regular turn, detect the electric capacity change amount of this first sense line 11, can judge the coordinate of touch point Y direction, then scan the position that this second sense line 12 is judged the touch point directions X more in regular turn.
In this capacitive touch screen 1, each coordinate points just needs relative first sense line 11 and second sense line 12, when the number of sense line 11,12 many more, just many more with the number of pins of this capacitive touch screen 1, its corresponding driving circuit is complicated more, and this capacitive touch screen 1 in use, its consumed power is also high more.
Summary of the invention
Capacitive touch screen wiring number is many in order to solve in the prior art, scanning complexity and the high problem of power consumption, is necessary to provide the capacitive touch screen that a kind of wiring number is few, scanning is simple and low in energy consumption.
A kind of capacitive touch screen, it comprises one first sense line and at least one second sense line, this first sense line and should be at least one the insulation of second sense line intersect a plurality of point of crossing of formation, wherein, the overlapping area of these a plurality of point of crossing has nothing in common with each other and forms a plurality of Inductance and Capacitance of different sizes.
A kind of capacitive touch screen, it comprises one first sense line, at least one second sense line and a control chip, the a plurality of Inductance and Capacitance of formation are intersected in this first sense line and this at least one second sense line insulation, wherein, this control chip drives this at least one second sense line with the voltage drive signals of different potentials in regular turn, makes overlapping area this a plurality of Inductance and Capacitance capacitances that have nothing in common with each other different.
Compared with prior art, capacitive touch screen of the present invention only adopt one first sense line and at least one second sense line, the a plurality of Inductance and Capacitance of formation are intersected in this first sense line and the insulation of this second sense line, and these a plurality of Inductance and Capacitance have different capacitance, can utilize different capacitance variations to reach the function that touches the location.Capacitive touch screen of the present invention only needs only to need less sense line, so its number of leads is few, scan drive circuit is simple and energy consumption is lower.
Description of drawings
Fig. 1 is the planar structure synoptic diagram of prior art capacitive touch screen.
Fig. 2 is the functional block diagram of a capacitive touch screen system.
Fig. 3 is the planar structure synoptic diagram of capacitive touch screen first embodiment of the present invention.
Fig. 4 is the planar structure synoptic diagram of capacitive touch screen second embodiment of the present invention.
Fig. 5 is the planar structure synoptic diagram of capacitive touch screen the 3rd embodiment of the present invention.
Fig. 6 is the cross-sectional view of capacitive touch screen the 4th embodiment of the present invention.
Fig. 7 is the cross-sectional view of capacitive touch screen the 5th embodiment of the present invention.
Fig. 8 is the cross-sectional view of capacitive touch screen the 6th embodiment of the present invention.
Embodiment
See also Fig. 2, it is the functional block diagram of a capacitive touch screen system.This touch-screen system 2 comprises a capacitive touch screen 21, an electric capacity detector 22, an analog/digital converter 23 and a control chip 24.The trigger pip 25 that this this control chip 24 produces, and transmit this trigger pip 25 to this capacitive touch screen 21.When touching any position of this capacitive touch screen 21, this position produces the capacitance variations of a corresponding size, this capacitance change is measured by this capacitive transducer 22, afterwards this capacitive transducer 22 transmit these signals to this analog/digital converter 23 being digital signal with analog signal conversion, digital signal is transferred into this control chip 24 afterwards, and this this control chip 24 is responsible for resolving the coordinate of this touch location.
See also Fig. 3, it is the planar structure synoptic diagram of capacitive touch screen first embodiment of the present invention.This capacitive touch screen 3 comprises second sense line 32 that one first sense line 31 is relative with first sense line 31 with one and insulation is provided with.This first sense line 31 and this second sense line 32 be S-shaped setting and a plurality of point of crossing C11～C1m of the crossing formation of mutual insulating respectively, and these a plurality of point of crossing are a matrix arranges, and wherein m represents the quantity of point of crossing.The overlapping area of these a plurality of point of crossing C11～C1m has nothing in common with each other, thereby these a plurality of point of crossing C11～C1m form a plurality of Inductance and Capacitance of different sizes owing to the difference of overlapping area.This first sense line 31 can be formed by conductors such as tin indium oxides with this second sense line 32.
One control chip (figure does not show) sends a trigger pip to this second sense line 32, when touching things such as finger touch the different position of this capacitive touch screen 3, because these capacitive touch screen 3 variant positions have the Inductance and Capacitance that varies in size, so have the capacitance variations that varies in size when touching these capacitive touch screen 3 diverse locations, this electric capacity detector 22 measures its capacitance change and becomes digital signal to be sent to this control chip analog signal conversion through this analog/digital converter 23 via this first sense line 31, and this control chip is resolved this digital signal and touched a little position with judgement.
The Inductance and Capacitance that varies in size that 3 of this capacitive touch screens utilize one first sense line 31 and one second sense line 32 to form just can reach the function that touches the location, therefore its number of leads is few, turntable driving is simpler, and can reach the purpose of energy efficient.
See also Fig. 4, it is the structural representation of capacitive touch screen second embodiment of the present invention.This capacitive touch screen 4 comprises one first sense line 41 and many second relative with this first sense line 41 and insulation is provided with sense line D41～D4n.These first sense line 41 and these many second all S-shaped settings of sense line D41～D4n, these many second sense line D41～D4n have identical arrangement mode, and this first sense line 41 and these many second sense line D41～a plurality of point of crossing C11～Cnm of the crossing formation of D4n insulation.Wherein a plurality of point of crossing of this second sense line D41 and this first sense line 41 are C11～C1m, represent common m point of crossing of this second sense line D41 and this first sense line 41, and a plurality of point of crossing of this second sense line D4n and this first sense line 41 are Cn1～Cnm, the rest may be inferred, this second sense line D41～D4n and this first sense line 41 total n*m point of crossing, and wherein the area of this point of crossing C1n～Cnm has nothing in common with each other, thereby forms a plurality of Inductance and Capacitance of different sizes.This second sense line D41～D4n and this first sense line 41 can be formed by conductors such as tin indium oxides.
One control chip (figure does not show) sends trigger pip S1～Sn in regular turn to these many second sense line D41～D4n, wherein trigger pip S1～Sn can be that the voltage signal of same potential also can be the voltage signal of different potentials, its order is: when each point of crossing C11～Cnm was enough big by the formed Inductance and Capacitance otherness of different overlapping areas, this trigger pip S1～Sn can use the voltage signal of same potential to carry out coordinate identification; When the different formed Inductance and Capacitance othernesses of usable floor area big inadequately and cause discrimination too hour, can send the trigger pip S1～Sn of different potentials by this control chip 24 in regular turn, increasing the otherness that Inductance and Capacitance changes, thereby increase the discrimination of this capacitive touch screen 4.
See also Fig. 5, it is the structural representation of capacitive touch screen the 3rd embodiment of the present invention.This capacitive touch screen 5 comprises one first sense line 51 and many many second relative with this first sense line 51 and insulation is provided with sense line D51～D5n.These first sense line 51 and these many second all S-shaped settings of sense line D51～D5n, these many second sense line D51～D5n have identical arrangement mode, and this first sense line 51 and these many second sense line D51～a plurality of point of crossing C11～Cnm of the crossing formation of D5n insulation.Wherein a plurality of point of crossing of this second sense line D51 and this first sense line 51 are C11～C1m, represent common m point of crossing of this second sense line D51 and this first sense line 51, and a plurality of point of crossing of this second sense line D5n and this first sense line 51 are Cn1～Cnm, the rest may be inferred, this second sense line D51～D5n and this first sense line 51 total n*m point of crossing, and wherein any one second sense line D51, D52, ..., a plurality of point of crossing area of D5n and this first sense line 51 has nothing in common with each other, be C11 ≠ C12 ≠ C13 ≠ ... ≠ C1m, ..., Cn1 ≠ Cn2 ≠ Cn3 ≠ ... ≠ Cnm, this any one second sense line D1, D2, ..., so a plurality of point of crossing of Dn and this first sense line 51 form a plurality of Inductance and Capacitance of different sizes because area has nothing in common with each other, these a plurality of Inductance and Capacitance form an Inductance and Capacitance matrix, these many second sense line D1 wherein, D2, ..., it is identical that Dn and this first sense line 31 intersect the overlapping area of the corresponding point of crossing in formed intersection point group C1～Cn, be C11=C21=C31=...=Cn1 ≠ C12=C22=C32=...=Cn2 ≠ ... C1m=C2m=...=Cnm, just the point of crossing of correspondence position has identical Inductance and Capacitance in this intersection point group C1～Cn, promptly, these many second sense line D1, D2, ..., Dn forms the identical a plurality of Inductance and Capacitance matrixes of size with this first sense line 31, and the capacitance of a plurality of Inductance and Capacitance of same position equates in these a plurality of Inductance and Capacitance matrixes.This first sense line 51 and this second sense line D1～Dn can be formed by conductor materials such as tin indium oxides.
One control chip (figure does not show) sends a trigger pip S1～Sn in regular turn to this second sense line D51～D5n, wherein this trigger pip S1～Sn is the voltage signal of different potentials, its objective is: this second sense line D51～D5n and this first sense line 51 intersect formed overlapping area of intersecting the corresponding point of crossing in point group C1～Cn in regular turn for identical, use the voltage signal of different potentials to distinguish these many second sense line D1～Dn and first sense line, 31 formed intersection point electric capacity groups, to strengthen the discrimination of this capacitive touch screen 5.
See also Fig. 6, it is the cross-sectional view of capacitive touch screen the 4th embodiment of the present invention.This capacitive touch screen 6 comprises one first substrate 61, one and second substrate 62 that is oppositely arranged of this first substrate 61.One first sense line 66 is arranged on this first substrate 61 towards these second substrate, 62 1 sides, and one second sense line 65 is arranged on this second substrate 62 towards these first substrate, 61 places, and this first sense line 66 forms point of crossing C with these second sense line, 65 infalls.This first sense line 66 and 65 of this second sense lines are provided with an insulation course 63.This first substrate 61 can be insulating material such as glass or transparent plastic with this second substrate 62, and this insulation course 63 can be that silicon nitride or plastic or other material are made.
See also Fig. 7, it is the cross-sectional view of capacitive touch screen the 5th embodiment of the present invention.This capacitive touch screen 7 comprises that first sense line 76, that one first substrate 71, is arranged on the surface of this first substrate 71 is arranged on second sense line 75 of this first substrate 71 with respect to another surface of first sense line 76.This first sense line 76 and these second sense line, 75 juxtaposition places form a plurality of point of crossing C.This second sense line, 75 surface coverage, one insulation course 73.This insulation course 73 can be insulating material such as silicon nitride or plastics, and this first substrate 71 can be insulating material such as glass or transparent plastic.
See also Fig. 8, it is the cross-sectional view of capacitive touch screen the 6th embodiment of the present invention, this capacitive touch screen 8 comprise one first substrate 81, be arranged on first sense line 86 on these first substrate, 81 surfaces, one and second sense line 85, that is oppositely arranged of this first sense line 86 be arranged on second insulation course 89 that first insulation course 88 and between this first sense line 86 and this second sense line 85 covers this second sense line 85.This second sense line 85 forms point of crossing C with these first sense line, 86 infalls.This first insulation course 88 can be insulating material such as silicon nitride.This second insulation course 89 can be insulating material such as silicon nitride or PET plastics.This first substrate 81 can be insulating material such as glass or transparent plastic.
Claims (9)
1. capacitive touch screen, it comprise one first sense line and, at least one second sense line, this first sense line and should be at least one the insulation of second sense line intersect a plurality of point of crossing of formation, it is characterized in that: the overlapping area of these a plurality of point of crossing has nothing in common with each other and forms a plurality of Inductance and Capacitance of different sizes.
2. capacitive touch screen as claimed in claim 1 further comprises a substrate, and this first sense line is separately positioned on the relative two side faces of this substrate with this at least one second sense line.
3. capacitive touch screen as claimed in claim 2 further comprises an insulation course, and this insulation course covers this first sense line.
4. capacitive touch screen as claimed in claim 1, further comprise one first substrate that is oppositely arranged, and one second substrate and an insulation course, this first sense line is separately positioned on this first substrate side relative with this second substrate with this at least one second sense line, and this insulation course is arranged between this first sense line and this at least one second sense line.
5. capacitive touch screen as claimed in claim 1, further comprise a substrate, one first insulation course and one second insulation course, this first sense line is arranged on this substrate surface, this first insulation course covers this first sense line, this at least one second sense line is arranged on this first insulation course, and this second insulation course covers this at least one second sense line.
6. capacitive touch screen, it comprises one first sense line, at least one second sense line and a control chip, the a plurality of Inductance and Capacitance of formation are intersected in this first sense line and this at least one second sense line insulation, it is characterized in that: this control chip drives this at least one second sense line with the voltage drive signals of different potentials in regular turn, makes overlapping area this a plurality of Inductance and Capacitance capacitances that have nothing in common with each other different.
7. capacitive touch screen as claimed in claim 6 is characterized in that: this first sense line and all S-type setting of this at least one second sense line.
8. capacitive touch screen as claimed in claim 6 is characterized in that: the number of this at least one second sense line is two, and this 2 second sense line is with identical shape setting.
9. capacitive touch screen as claimed in claim 8, it is characterized in that: it is different and be the Inductance and Capacitance that a matrix is arranged that each second sense line and this first sense line all form a plurality of capacitances, and then this 2 second sense line and the identical Inductance and Capacitance matrixes of these first sense line formation, two sizes, the capacitance of two Inductance and Capacitance of same position equates in this two Inductance and Capacitance matrix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100672696A CN101582002B (en) | 2008-05-16 | 2008-05-16 | Capacitive touch screen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100672696A CN101582002B (en) | 2008-05-16 | 2008-05-16 | Capacitive touch screen |
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| CN101582002A CN101582002A (en) | 2009-11-18 |
| CN101582002B true CN101582002B (en) | 2011-12-14 |
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| CN2008100672696A Expired - Fee Related CN101582002B (en) | 2008-05-16 | 2008-05-16 | Capacitive touch screen |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US8421890B2 (en) | 2010-01-15 | 2013-04-16 | Picofield Technologies, Inc. | Electronic imager using an impedance sensor grid array and method of making |
| US8791792B2 (en) | 2010-01-15 | 2014-07-29 | Idex Asa | Electronic imager using an impedance sensor grid array mounted on or about a switch and method of making |
| US9798917B2 (en) | 2012-04-10 | 2017-10-24 | Idex Asa | Biometric sensing |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US8866347B2 (en) | 2010-01-15 | 2014-10-21 | Idex Asa | Biometric image sensing |
| CN101950230B (en) * | 2010-09-21 | 2012-02-22 | 友达光电股份有限公司 | Capacitive touch sensor and capacitive touch device |
| EP2597553A4 (en) * | 2011-02-15 | 2014-12-24 | Egalax Empia Technology Inc | Capacitive sensing device and detecting method thereof |
| CN102156582B (en) * | 2011-04-07 | 2013-01-02 | 台均科技（深圳）有限公司 | Sensor, touch-control module and touch-control electronic device |
| CN102163112B (en) * | 2011-04-07 | 2014-07-23 | 台均科技（深圳）有限公司 | Sensor, dual-mode touch module and dual-mode touch electronic device |
| CN107239183B (en) * | 2014-12-24 | 2020-05-05 | 深圳市华星光电技术有限公司 | Flexible touch panel |
Citations (2)
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|---|---|---|---|---|
| CN1663124A (en) * | 2002-06-21 | 2005-08-31 | 3M创新有限公司 | Capacitive touch sensor architecture with unique sensor bar addressing |
| CN101089802A (en) * | 2006-05-31 | 2007-12-19 | 哈拉尔德·菲利普 | Two-dimensional position sensor |
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2008
- 2008-05-16 CN CN2008100672696A patent/CN101582002B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1663124A (en) * | 2002-06-21 | 2005-08-31 | 3M创新有限公司 | Capacitive touch sensor architecture with unique sensor bar addressing |
| CN101089802A (en) * | 2006-05-31 | 2007-12-19 | 哈拉尔德·菲利普 | Two-dimensional position sensor |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8421890B2 (en) | 2010-01-15 | 2013-04-16 | Picofield Technologies, Inc. | Electronic imager using an impedance sensor grid array and method of making |
| US8791792B2 (en) | 2010-01-15 | 2014-07-29 | Idex Asa | Electronic imager using an impedance sensor grid array mounted on or about a switch and method of making |
| US9600704B2 (en) | 2010-01-15 | 2017-03-21 | Idex Asa | Electronic imager using an impedance sensor grid array and method of making |
| US9798917B2 (en) | 2012-04-10 | 2017-10-24 | Idex Asa | Biometric sensing |
| US10088939B2 (en) | 2012-04-10 | 2018-10-02 | Idex Asa | Biometric sensing |
| US10101851B2 (en) | 2012-04-10 | 2018-10-16 | Idex Asa | Display with integrated touch screen and fingerprint sensor |
| US10114497B2 (en) | 2012-04-10 | 2018-10-30 | Idex Asa | Biometric sensing |
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| CN101582002A (en) | 2009-11-18 |
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Owner name: QIMEI ELECTRONIC CO LTD Free format text: FORMER OWNER: INNOLUX DISPLAY CORPORATION |
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Effective date of registration: 20111021 Address after: 518109 Longhua, Shenzhen, town, Foxconn science and Technology Industrial Park E District, building 1, floor 4, Applicant after: Qunkang Technology (Shenzhen) Co., Ltd. Co-applicant after: Chimei Optoelectronics Co., Ltd. Address before: 518109 Longhua, Shenzhen, town, Foxconn science and Technology Industrial Park E District, building 1, floor 4, Applicant before: Qunkang Technology (Shenzhen) Co., Ltd. Co-applicant before: Innolux Display Group |
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