CN102819364A - Capacitive touch screen and touch device with same - Google Patents

Capacitive touch screen and touch device with same Download PDF

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Publication number
CN102819364A
CN102819364A CN2011101527545A CN201110152754A CN102819364A CN 102819364 A CN102819364 A CN 102819364A CN 2011101527545 A CN2011101527545 A CN 2011101527545A CN 201110152754 A CN201110152754 A CN 201110152754A CN 102819364 A CN102819364 A CN 102819364A
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CN
China
Prior art keywords
receiving
touch screen
conductive array
cantilever portion
capacitance touch
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Pending
Application number
CN2011101527545A
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Chinese (zh)
Inventor
王波
李振刚
黄臣
杨云
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BYD Co Ltd
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BYD Co Ltd
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Publication date
Application filed by BYD Co Ltd filed Critical BYD Co Ltd
Priority to CN2011101527545A priority Critical patent/CN102819364A/en
Publication of CN102819364A publication Critical patent/CN102819364A/en
Pending legal-status Critical Current

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Abstract

The invention provides a capacitive touch screen which comprises a transparent base plate, a first conducting array and a second conducting array. The first conducting array is arranged on the transparent base plate and comprises a plurality of drive components for providing drive signals, and the drive components are of hexagon. The second conducing array has a scheduled angle with the first conducting array and comprises a plurality of receiving components for receiving the drive signals provided by the plurality of drive components. The receiving components comprise bodies and a plurality of cantilever portions extending outward perpendicularly from the bodies, and a scheduled distance is arranged between the adjacent cantilever portions. The invention further provides a touch device with the capacitive touch screen. The shapes of the drive components and the receiving components are changed, the distance between the receiving components and the drive components is enlarged, and therefore mutual capacitance variation is improved, and induction sensitivity and linearity are improved.

Description

Capacitance touch screen and have the contactor control device of this capacitance touch screen
Technical field
The present invention relates to the touch technology field, particularly a kind of improved capacitance touch screen and have the contactor control device of this capacitance touch screen.
Background technology
Touch-screen utilizes the characteristics that its mechanical loss is little and volume is little, has been widely used on each electronic product.Common touch-screen has self-capacitance and mutual capacitance printed circuit board arrangement.Self-capacitance can only be realized single-point touches, can produce " terrible point " if two point touches.Therefore, the application of mutual capacitance type printed circuit board arrangement is more extensive.
Fig. 1 is the planimetric map of existing double-deck mutual capacitance type printed circuit board arrangement.Laterally black bar is the capacitance signal test side 200 ' of top layer, and vertically for pumping signal provides end 100 ', the two is vertical each other.When touching object (like finger) not during touch screen, pumping signal provides the negative charge of end 100 ' main absorption detecting end 200 ', and both capacitances of formation are C1.When touching object (like finger) touch screen; Because greatly pumping signal provides end 100 ' distance signal test side 200 ' far away and pumping signal provides end 100 ' distance finger nearer; Therefore can transfer to absorb the negative charge on the finger; Correspondingly the electric charge of absorption signal test side 200 ' will reduce, so input end 200 ' and pumping signal provide the mutual capacitance meeting that forms between the end 100 ' to reduce.Through the size of relevant detection electric circuit inspection mutual capacitance variable quantity, can judge whether contact is effective contact, and can calculate the coordinate of finger on screen through corresponding calculation method, realize the location.Therefore, even a plurality of touch points are arranged on the screen, also can calculate the true coordinate of each touch point.
There is such problem in the arrangement that the input end of existing mutual capacitance type touch-screen and pumping signal provide end: when touching object (like finger) when being between two input ends; When perhaps only end being provided near one of them pumping signal; Another pumping signal provides end will have only small induction; Therefore induced signal can not form and stablize accurate linear change, thereby produces positioning error.
In addition, the mutual capacitance type touch-screen comprises individual layer mutual capacitance type touch-screen and double-deck mutual capacitance type touch-screen.Though the cost of double-deck mutual capacitance type touch-screen is low than the Trackpad cost of four layers or three layers circuit structure, still can't satisfy the requirement of user to price.Though the cost of individual layer mutual capacitance type touch-screen is very low; But the capacitance change of capacitive transducer output is very little; And wherein there is stray capacitance; And stray capacitance can change with many factor affecting such as temperature, position, inner electric field and outer electric field distributions, disturbs even floods the measured capacitance signal, and causing can't sensing touch and touch point, location.
Summary of the invention
The object of the invention is intended to solve at least one of above-mentioned technological deficiency.
For achieving the above object, first aspect present invention proposes a kind of capacitance touch screen, comprising: transparency carrier; First conductive array, said first conductive array is arranged on the said transparency carrier, and said first conductive array comprises a plurality of driver units, and said a plurality of driver units are used to provide pumping signal, and wherein said driver unit is a hexagon; And second conductive array; Said second conductive array is arranged to become predetermined angular with said first conductive array; And said second conductive array comprises a plurality of receiving-members; Said a plurality of receiving-member is used to receive the pumping signal that said a plurality of driver unit provides, and wherein said receiving-member comprises body and between between vertical outward extending a plurality of cantilever portion of said body and the adjacent cantilever portion, is separated with predetermined distance.
According to the capacitance touch screen of the embodiment of the invention, through changing the shape of driver unit and receiving-member, can increase the distance between receiving-member and the driver unit, thereby improve the variable quantity of mutual capacitance, improve the induction sensitivity and the linearity.
Second aspect present invention also proposes a kind of contactor control device, comprising: according to the described capacitance touch screen of first aspect present invention; The one I/O interface group, each the I/O interface in the said I/O interface group links to each other with a driver unit; The 2nd I/O interface group, each the I/O interface in said the 2nd I/O interface group links to each other with a receiving-member; And controller, said controller links to each other with the 2nd I/O interface group with a said I/O interface group respectively, detects the position that said touch-screen is touched according to the variable quantity of mutual capacitance between said driver unit and the receiving-member.
Capacitance touch screen according to the embodiment of the invention; Through adopting the capacitance touch screen of said structure; Increase the surveyed area of the variation of the mutual capacitance that detects driver unit and receiving-member, made the coordinate Calculation of touch point more accurate, improved the bearing accuracy of contactor control device.
Aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize through practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously with easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is the synoptic diagram of existing double-deck mutual capacitance type printed circuit board arrangement;
Fig. 2 does not have the synoptic diagram of chinampa touch screen structure for the mutual capacitance type individual layer of one embodiment of the invention;
Fig. 3 is the synoptic diagram of the receiving-member of one embodiment of the invention;
Fig. 4 is the mutual capacitance type individual layer of one embodiment of the invention and the synoptic diagram that the touch screen structure on chinampa is arranged;
Fig. 5 is the synoptic diagram of the touch screen structure on the double-deck no chinampa of the mutual capacitance type of one embodiment of the invention;
Fig. 6 is the mutual capacitance type bilayer of one embodiment of the invention and the synoptic diagram that the touch screen structure on chinampa is arranged; And
Fig. 7 is the structural representation of the contactor control device of the embodiment of the invention.
Embodiment
Describe embodiments of the invention below in detail, the example of said embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Be exemplary through the embodiment that is described with reference to the drawings below, only be used to explain the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention; It will be appreciated that; Term " vertically ", " laterally ", " on ", the orientation of indications such as D score, " preceding ", " back ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward " or position relation be for based on orientation shown in the drawings or position relation; Only be to describe with simplifying for the ease of describing the present invention; Rather than the device or the element of indication or hint indication must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
In description of the invention, need to prove, unless otherwise prescribed and limit; Term " installation ", " linking to each other ", " connection " should be done broad understanding, for example, can be mechanical connection or electrical connection; Also can be the connection of two element internals, can be directly to link to each other, and also can link to each other indirectly through intermediary; For those of ordinary skill in the art, can understand the concrete implication of above-mentioned term as the case may be.
According to the capacitance touch screen of the embodiment of the invention, comprise transparency carrier, first conductive array and second conductive array.First conductive array is arranged on the transparency carrier and comprises a plurality of driver units, is used to provide pumping signal.Second conductive array becomes predetermined angular and comprises a plurality of receiving-members with first conductive array, is used to receive the pumping signal that said a plurality of driver unit provides.Each driver unit is a hexagon, and each receiving-member comprises body and between between vertical outward extending a plurality of cantilever portion of body and the adjacent cantilever portion, is separated with predetermined distance.First conductive array and second conductive array can adopt transparent conductor to form.
In an example of the present invention, predetermined angular can be 90 degree, and promptly first conductive array is provided with second conductive array is vertical.
First conductive array and second conductive array can be positioned at two planes also can be positioned at same plane.
When first conductive array and second conductive array were positioned at two planes, first conductive array was arranged on the below of second conductive array and the predetermined distance of being separated by, thereby can realize insulating between first conductive array and second conductive array.
When first conductive array and second conductive array were positioned at same plane, first conductive array and second conductive array were to inserting to form capacitance touch screen.
Below referring to figs. 2 and 3 the individual layer capacitance touch screen of describing according to the embodiment of the invention.
First conductive array of individual layer capacitance touch screen comprises that a plurality of driver unit 100, the second conductive array comprise a plurality of receiving-members 200, realizes through 200 pairs of receiving-members being inserted in the driver unit 100.As shown in Figure 2, first conductive array comprises driver unit Tx1, Tx2, Tx3, Tx4, Tx5 and Tx6, and second conductive array comprises receiving-member Rx1, Rx2, Rx3, Rx4 and Rx5.Each driver unit is hexagon, each receiving-member comprise body 210 with from body 210 vertical outward extending a plurality of cantilever portion 220, and be separated with predetermined distance between between the adjacent cantilever portion 220.The body 210 and the cantilever portion 220 of receiving-member 200 can be integrally formed.Driver unit 100 breaks off with the body of receiving-member 200 210 equitant positions, and through wire jumper 300 be electrically connected and with receiving-member 200 electrical isolations.For example, wire jumper 300 can be the carbon film wire jumper.It is understandable that this is merely schematic example, also can be for the body of receiving-member 200 break off in the position that coincides with driver unit 100, and be electrically connected through wire jumper 300.
Thus; Through the driver unit 100 and receiving-member 200 that designs above-mentioned shape; Can increase the distance between receiving-member 200 and the driver unit 100, thereby can reduce the initial capacitance value of touch-screen, increase the capacitance change between receiving-member 200 and the driver unit 100.In the manufacture course of products of reality, can reduce production costs to a certain extent, and improve the properties of product of utilizing this capacitance touch screen 1.
Describe the receiving-member 200 of one embodiment of the invention in detail below in conjunction with Fig. 3.
As shown in Figure 3, a plurality of cantilever portion comprise: first cantilever portion 221 and at least one second cantilever portion 222.In one embodiment of the invention, a plurality of cantilever portion 220 form with respect to the body 210 of receiving-member symmetrically.First cantilever portion 221 and second cantilever portion 222 all can be strip.
First cantilever portion 221 stretches out from receiving-member body 210, for example vertically stretches out from said receiving-member body 210.At least one second cantilever portion 222, and also stretches out from receiving-member body 210 to the direction setting away from said first cantilever portion 221 from first cantilever portion 221, for example vertically stretches out from said receiving-member body 210.
In an example of the present invention, the length of a plurality of second cantilever portion 222 can be different, for example reduce gradually along the direction length away from first cantilever portion 221.It is understandable that a plurality of second cantilever portion 222 are along can be mutually the same away from the direction length of first cantilever portion 221.
As shown in Figure 3, vertical protruding edge first cantilever portion, 221 two symmetrical groups, second cantilever portion 222 in the both sides of first cantilever portion 221.Every group second cantilever portion 222 comprises the first cantilever 222a, the second cantilever 222b, the 3rd cantilever 222c and the 4th cantilever 222d.Wherein, the first cantilever 222a and the 4th cantilever 222d are with respect to first cantilever portion, 221 symmetries, and the second cantilever 222b and the 3rd cantilever 222c are with respect to first cantilever portion, 221 symmetries.
In an example of the present invention, the first cantilever 222a is identical and measure-alike with the shape of the 4th cantilever 222d, the second cantilever 222b and the 3rd cantilever 222c.The first cantilever 222a is being parallel to length on first cantilever portion, 221 directions less than the second cantilever 222b.
The foregoing description has increased the ratio that relative mutual capacitance changes to a certain extent, but also causes the mutual capacitance value to diminish simultaneously, causes detection difficulty to increase, and the requirement of chip and correlation detecting circuit is increased.In order to address the above problem, the present invention also proposes a kind of capacitance touch screen of filling the chinampa structure.
Be illustrated in figure 4 as the mutual capacitance type individual layer of one embodiment of the invention and the synoptic diagram of the capacitance touch screen of chinampa structure is arranged, be provided with a plurality of separate chinampa structures 400 in the gap between adjacent cantilever portion 220.Chinampa structure 400 is a kind of conductive material, for example ITO.When the distance between receiving-member 200 and the driver unit 100 is constant; Chinampa structure 400 just looks like the bridge between receiving-member 200 and the driver unit 100; Bridge joint through chinampa structure 400 distance between receiving-member 200 and the driver unit 100 that in fact has been equivalent to further; Make the initial mutual capacitance value between receiving-member 200 and the driver unit 100 increase, thereby improve the mutual capacitance variable quantity after touching, and make its of one-tenth stablize accurate linear change; Be convenient to detect, improve the precision of judging.Through regulating the size of chinampa structure 400, perhaps regulate the spacing distance between a plurality of chinampas structure 400, can regulate the scope that touches back mutual capacitance variable quantity, make it be more conducive to detect.Simultaneously, the filling of chinampa structure also makes the graphical distribution of whole screen more even, and the screen transmittance is more consistent, the screen display better effects if.
The individual layer capacitance touch screen practiced thrift manufacturing cost, and the light transmission of screen is also better because first conductive array and second conductive array are placed at grade.Certainly, the present invention also can adopt double-decker, also can improve the variable quantity of mutual capacitance effectively, improves the signal to noise ratio (S/N ratio) and the linearity.Describe the double-layer capacitance touch-screen of the embodiment of the invention in detail below in conjunction with Fig. 5 and Fig. 6.
Be illustrated in figure 5 as the synoptic diagram of capacitance touch screen of the double-deck no chinampa of the mutual capacitance type structure of one embodiment of the invention; First conductive array of this capacitance touch screen is arranged on the below of second conductive array and the predetermined distance of being separated by; First conductive array comprises driver unit Tx1, Tx2, Tx3 and Tx4, and second conductive array comprises receiving-member Rx1, Rx2, Rx3 and Rx4.It is understandable that this is merely schematic example, also can be arranged on the below of first conductive array and the predetermined distance of being separated by for second conductive array.
Likewise, in double-deck capacitance touch screen, also can fill the chinampa structure to increase the variable quantity of mutual capacitance.It is double-deck and the synoptic diagram of the capacitance touch screen of chinampa structure is arranged to be illustrated in figure 6 as the mutual capacitance type of one embodiment of the invention, between adjacent cantilever portion 220, is provided with a plurality of separate chinampa structures 400.Chinampa structure 400 can be positioned at same plane with first conductive array, also can be positioned at same plane with second conductive array.
It is understandable that the structure of capacitance touch screen is not limited to the foregoing description, the quantity of driver unit 100 and receiving-member 200 can be provided with according to the size of touch-screen and the needs that are used to detect.
The contactor control device of describing according to the embodiment of the invention with reference to figure 7 below.
As shown in Figure 7; Comprise capacitance touch screen that the above embodiment of the present invention provides 1, an I/O interface group 2, the 2nd I/O interface group 3 and controller 4 according to the contactor control device of the embodiment of the invention; Wherein each the I/O interface in the I/O interface group 2 links to each other with a driver unit 100; Each I/O interface in the 2nd I/O interface group 3 links to each other with a receiving-member 200; Controller 4 links to each other with the 2nd I/O interface group 3 with a said I/O interface group 2 respectively, detects the position that said touch-screen is touched according to the variable quantity of mutual capacitance between driver unit 100 and the receiving-member 200.
A plurality of driver units 100 provide pumping signal to a plurality of receiving-members 200 in turn, and a plurality of receiving-member 200 timesharing detect, and accomplish scanning process.Thus, can satisfy single-point or multiple spot simultaneously detects.
When touching object (like finger) near capacitance touch screen 1; Negative charge on the driver unit 100 meeting absorption portion fingers; Therefore absorb corresponding the reducing of electric charge meeting of receiving-member 200, thereby make the mutual capacitance value between receiving-member 200 and the driver unit 100 reduce.Controller 4 is gathered the electric charge of driver unit 100 and receiving-member 200 through an I/O interface group 2 and the 2nd I/O interface group 3; And calculating the variable quantity of the mutual capacitance between driver unit 100 and the receiving-member 200, the variable quantity according to mutual capacitance can calculate touch point and the touch action that touches object then.Because receiving-member 200 receives the area broadening of pumping signals, make controller 4 detect the also broadening of surveyed area of the variable quantity of mutual capacitance, capacitance is meticulousr to the reaction of the touch action that touches object, has improved the linearity of contactor control device.In addition; Owing between driver unit 100 and receiving-member 200, added the chinampa structure 400 of conductive material, in fact reduced the distance between driver unit 100 and the receiving-member 200, make initial mutual capacitance value become big; Thereby increase the back capacitance variation amount that touches; Make controller 4 detect the also broadening of surveyed area of the variable quantity of mutual capacitance, capacitance is meticulousr to the reaction of the touch action that touches object, has further improved the linearity of contactor control device.
Contactor control device according to the embodiment of the invention; Through adopting the capacitance touch screen of said structure; Increase the zone of the variable quantity of the mutual capacitance that detects receiving-member and driver unit, made the coordinate Calculation of touch point more accurate, improved the bearing accuracy of contactor control device.
Although illustrated and described embodiments of the invention; For those of ordinary skill in the art; Be appreciated that under the situation that does not break away from principle of the present invention and spirit and can carry out multiple variation, modification, replacement and modification that scope of the present invention is accompanying claims and be equal to and limit to these embodiment.

Claims (12)

1. a capacitance touch screen is characterized in that, comprising:
Transparency carrier;
First conductive array, said first conductive array is arranged on the said transparency carrier, and said first conductive array comprises a plurality of driver units, and said a plurality of driver units are used to provide pumping signal, and wherein said driver unit is a hexagon; And
Second conductive array; Said second conductive array is arranged to become predetermined angular with said first conductive array; And said second conductive array comprises a plurality of receiving-members; Said a plurality of receiving-member is used to receive the pumping signal that said a plurality of driver unit provides, and wherein said receiving-member comprises body and between between vertical outward extending a plurality of cantilever portion of said body and the adjacent cantilever portion, is separated with predetermined distance.
2. capacitance touch screen according to claim 1 is characterized in that, between adjacent cantilever portion, also is provided with a plurality of separate chinampa structures.
3. capacitance touch screen according to claim 2 is characterized in that, said chinampa structure comprises conductive material.
4. capacitance touch screen according to claim 2; It is characterized in that; Said first conductive array, said second conductive array and said chinampa structure all are positioned at same plane; And said driver unit or said receiving-member break off in the equitant position of the body of said driver unit and said receiving-member, and connect through wire jumper.
5. capacitance touch screen according to claim 2; It is characterized in that; Said first conductive array and said second conductive array are positioned at different plane and are separated by predetermined distance; And said chinampa structure and said second conductive array are positioned at same plane, and perhaps said chinampa structure and said first conductive array are positioned at same plane.
6. capacitance touch screen according to claim 1 is characterized in that, said a plurality of cantilever portion comprise:
Vertical outward extending first cantilever portion of body from said receiving-member; With
From at least one second cantilever portion that said first cantilever portion is provided with to the direction away from said first cantilever portion, said second cantilever portion vertically stretches out from the body of said receiving-member.
7. capacitance touch screen according to claim 1 is characterized in that, said second cantilever portion reduces along the direction length away from said first cantilever portion gradually.
8. capacitance touch screen according to claim 1 is characterized in that, said a plurality of cantilever portion are with respect to said body symmetry.
9. capacitance touch screen according to claim 1 is characterized in that, the parallel setting of said a plurality of driver units, and the parallel setting of said a plurality of receiving-member.
10. capacitance touch screen according to claim 1 is characterized in that, said first conductive array and vertical setting of said second conductive array.
11. capacitance touch screen according to claim 1 is characterized in that, the cantilever portion of said receiving-member and the body of said receiving-member are integrally formed.
12. a contactor control device is characterized in that, comprising:
According to each described capacitance touch screen among the claim 1-11;
The one I/O interface group, each the I/O interface in the said I/O interface group links to each other with a said driver unit;
The 2nd I/O interface group, each the I/O interface in said the 2nd I/O interface group links to each other with a said receiving-member; With
Controller, said controller link to each other with the 2nd I/O interface group with a said I/O interface group respectively, detect the position that said touch-screen is touched according to the variable quantity of mutual capacitance between said receiving-member and the said driver unit.
CN2011101527545A 2011-06-08 2011-06-08 Capacitive touch screen and touch device with same Pending CN102819364A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103579222A (en) * 2013-01-29 2014-02-12 中国科学院高能物理研究所 Capacitor topological structure and integrated circuit
CN104423754A (en) * 2013-09-11 2015-03-18 比亚迪股份有限公司 Touch detection assembly, touch control device and portable electronic equipment
US9791980B2 (en) 2013-03-27 2017-10-17 Atmel Corporation Touch sensor with edge-balanced macro-feature design

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Publication number Priority date Publication date Assignee Title
US20040119701A1 (en) * 2002-12-19 2004-06-24 Mulligan Roger C. Lattice touch-sensing system
CN101126969A (en) * 2007-10-11 2008-02-20 友达光电股份有限公司 Low coupling capacitor condenser type touch control board
CN101995993A (en) * 2009-08-03 2011-03-30 爱特梅尔公司 Electrode layout for touch screens

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040119701A1 (en) * 2002-12-19 2004-06-24 Mulligan Roger C. Lattice touch-sensing system
CN101126969A (en) * 2007-10-11 2008-02-20 友达光电股份有限公司 Low coupling capacitor condenser type touch control board
CN101995993A (en) * 2009-08-03 2011-03-30 爱特梅尔公司 Electrode layout for touch screens

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103579222A (en) * 2013-01-29 2014-02-12 中国科学院高能物理研究所 Capacitor topological structure and integrated circuit
CN103579222B (en) * 2013-01-29 2016-03-23 中国科学院高能物理研究所 Capacitor topological structure and integrated circuit
US9791980B2 (en) 2013-03-27 2017-10-17 Atmel Corporation Touch sensor with edge-balanced macro-feature design
US10394402B2 (en) 2013-03-27 2019-08-27 Atmel Corporation Touch sensor with edge-balanced macro-feature design
CN104423754A (en) * 2013-09-11 2015-03-18 比亚迪股份有限公司 Touch detection assembly, touch control device and portable electronic equipment

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