CN102819363A - Capacitive touch screen and touch control device comprising same - Google Patents
Capacitive touch screen and touch control device comprising same Download PDFInfo
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- CN102819363A CN102819363A CN2011101527278A CN201110152727A CN102819363A CN 102819363 A CN102819363 A CN 102819363A CN 2011101527278 A CN2011101527278 A CN 2011101527278A CN 201110152727 A CN201110152727 A CN 201110152727A CN 102819363 A CN102819363 A CN 102819363A
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Abstract
The invention provides a capacitive touch screen comprising a transparent substrate, a first conductive array and a second conductive array. The first conductive array is arranged on the transparent substrate and comprises a plurality of stimulating parts for providing stimulus signals. The second conductive array is arranged to form a predetermined angle with the first conductive array and comprises a plurality of receiving parts for receiving the stimulus signals from the stimulating parts, and each receiving part comprises a body and signal enhancement parts connected with the body. The signal enhancement parts extend outwards from the overlapping positions of the bodies and the stimulating parts and are provided with a plurality of straight line branches in predetermined angles with the bodies, so that areas of the receiving parts for receiving stimulus signals are enlarged. The invention further provides a touch control device comprising the capacitive touch screen. By changing the shapes of the receiving parts, mutual capacitance variable quantity between the receiving parts and the stimulating parts can be increased, and signal to noise ratio and linearity are increased.
Description
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.Vertically black bar is the capacitance signal test side 200 ' of top layer, and laterally 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 point 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; 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; With the reception signal enhancing portion that links to each other with said body; Said reception signal enhancing portion stretches out from said body and the equitant position of said driver unit; And said reception signal enhancing portion has the rectilinear branches that a plurality of and said body becomes predetermined angular, to increase the receiving area that said receiving-member receives pumping signal.
According to the capacitance touch screen of the embodiment of the invention, through changing the shape of receiving-member, can increase the mutual capacitance variable quantity between receiving-member and the driver unit, improve the signal to noise ratio (S/N ratio) and the linearity.
Second aspect present invention 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 receiving-member and the driver unit.
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.
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 receiving-member of the capacitance touch screen of the embodiment of the invention;
Fig. 4 is the synoptic diagram of driver unit of the capacitance touch screen of the embodiment of the invention;
Fig. 5 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. 6 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. 7 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;
Fig. 8 is the mutual capacitance type bilayer of another embodiment of the present invention and the synoptic diagram that the touch screen structure on chinampa is arranged; And
Fig. 9 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 receiving-member comprises body and the reception signal enhancing portion that links to each other with body; Said reception signal enhancing portion stretches out from body and the equitant position of driver unit; And receive signal enhancing portion and have a plurality of rectilinear branches that become predetermined angular with body, to increase the receiving area that receiving-member receives pumping signal.
In an example of the present invention, said 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.
Referring to figs. 2 to Fig. 5 the individual layer capacitance touch screen according to the embodiment of the invention is described below.
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, through realizing in the hollow-out parts 110 that 200 pairs of receiving-members is inserted into driver unit 100.As shown in Figure 2, first conductive array comprises driver unit Tx1, Tx2 and Tx3, and second conductive array comprises receiving-member Rx1 and Rx2.Each receiving-member comprises body 210 and the reception signal enhancing portion 220 that links to each other with body 210, and reception signal enhancing portion 220 has rectilinear branches a plurality of and 210 one-tenth predetermined angulars of body.The body 210 of receiving-member 200 can be integrally formed with reception signal enhancing portion 220.Driver unit 100 breaks off with the body of receiving-member 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, the body 210 of receiving-member breaks off with the equitant position of the non-hollow-out parts of driver unit, and is electrically connected through wire jumper 300.
Thus, through designing the reception signal enhancing portion of above-mentioned shape, can increase the receiving area that receiving-member 200 receives pumping signal, thereby 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.
To describe the driver unit and the receiving-member of capacitance touch screen below in detail.
In an example of the present invention, a plurality of driver unit 100 parallel settings and the 200 parallel settings of a plurality of receiving-member.In another example of the present invention, driver unit 100 and receiving-member 200 vertical settings.As shown in Figure 2, a plurality of driver unit Tx1, Tx2 and Tx3 are spaced apart along horizontal (horizontal direction among Fig. 2) parallel setting and adjacent driver unit.A plurality of receiving-member Rx1 and Rx2 be (vertical direction among Fig. 2) parallel setting longitudinally, and adjacent receiving-member is spaced apart from each other.
As shown in Figure 3, receive signal enhancing portion 220 and comprise two rectilinear branches 221 and 222.210 one-tenth predetermined angles of the body of each rectilinear branches and receiving-member.In one embodiment of the invention, reception signal enhancing portion 220 forms with respect to the body 210 of receiving-member symmetrically.Two rectilinear branches all can be strip.
In one embodiment of the invention, two rectilinear branches 221 are identical with 222 length.
As shown in Figure 4; Each driver unit all has hollow-out parts 110; The shape of hollow-out parts 110 is configured to be suitable for holding at least a portion that receives signal enhancing portion 220 and the body 210 that is formed with the receiving-member that receives signal enhancing portion 220, is contained in the hollow-out parts 110 receiving signal enhancing portion 220 at least a portion with the body 210 that is formed with the receiving-member that receives signal enhancing portion 220.Wherein, have predetermined spacing between reception signal enhancing portion 220 and the hollow-out parts 110, thereby can realize first conductive array and the insulation of second conductive array.
In addition, thus can between the receiving-member of single-layer touch screen and driver unit, embed the variable quantity that a kind of independent conductors medium increases mutual capacitance.Be illustrated in figure 5 as the mutual capacitance type individual layer of one embodiment of the invention and by the synoptic diagram of the capacitance touch screen of chinampa structure, in the hollow-out parts 110 of driver unit and receive in the gap between the signal enhancing portion 220 and be provided with a plurality of separate chinampa structures 400.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 the variable quantity of the mutual capacitance after the touch is provided, and make its of one-tenth stablize accurate linear change; Be convenient to detect, improve the precision of judging.Through regulating the size and the quantity 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.
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 signal to noise ratio (S/N ratio) and induction sensitivity.Describe the double-layer capacitance touch-screen of the embodiment of the invention in detail below in conjunction with Fig. 6 and Fig. 7.
Be illustrated in figure 6 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 and Tx3, and second conductive array comprises receiving-member Rx1 and Rx2.It is understandable that this is merely schematic example, also can be arranged on the below of first conductive array and predetermined at interval distance for second conductive array.
Likewise, in double-deck capacitance touch screen, also can embed a kind of independent conductors medium 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 7 as the mutual capacitance type of one embodiment of the invention, in the hollow-out parts 110 of driver unit, is provided with a plurality of separate chinampa structures 400.It is double-deck and the synoptic diagram of the capacitance touch screen of chinampa structure is arranged to be illustrated in figure 8 as the mutual capacitance type of another embodiment of the present invention, is provided with a plurality of separate chinampa structures 400 around receiving signal enhancing portion 220.
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 9 below.
As shown in Figure 9; 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 (13)
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;
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, and said a plurality of receiving-members are used to receive the pumping signal that said a plurality of driver unit provides; Wherein, said receiving-member comprises:
Body;
The reception signal enhancing portion that links to each other with said body; Said reception signal enhancing portion stretches out from said body and the equitant position of said driver unit; And said reception signal enhancing portion has the rectilinear branches that a plurality of and said body becomes predetermined angular, to increase the receiving area that said receiving-member receives pumping signal.
2. capacitance touch screen according to claim 1; It is characterized in that; Be formed with hollow-out parts on the said driver unit, the shape of said hollow-out parts is configured to be suitable for holding at least a portion of the said reception signal enhancing portion and the body of the said reception signal enhancing of formation portion.
3. capacitance touch screen according to claim 2; It is characterized in that; Said first conductive array, said second conductive array and said reception signal enhancing portion all are positioned at same plane; And the body of said driver unit or said receiving-member breaks off at said driver unit and the equitant position of said receiving-member, and connects through wire jumper.
4. capacitance touch screen according to claim 3 is characterized in that, has the gap of preset distance between said reception signal enhancing portion and the said hollow-out parts.
5. capacitance touch screen according to claim 4 is characterized in that, also is provided with a plurality of separate chinampa structures in the gap between the hollow-out parts of said driver unit and said reception signal enhancing portion.
6. capacitance touch screen according to claim 2 is characterized in that, said first conductive array and the said second conductive array predetermined distance of being separated by.
7. capacitance touch screen according to claim 6 is characterized in that, in the hollow-out parts of said driver unit or around said reception signal enhancing portion, also is provided with a plurality of separate chinampa structures.
8. according to claim 5 or 7 described capacitance touch screens, it is characterized in that said chinampa structure comprises conductive material.
9. capacitance touch screen according to claim 1 is characterized in that, said a plurality of rectilinear branches are with respect to said body symmetry.
10. 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.
11. capacitance touch screen according to claim 1 is characterized in that, said first conductive array and vertical setting of said second conductive array.
12. capacitance touch screen according to claim 1 is characterized in that, the body of said reception signal enhancing portion and said receiving-member is integrally formed.
13. a contactor control device is characterized in that, comprising:
According to each described capacitance touch screen among the claim 1-12;
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; 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110152727.8A CN102819363B (en) | 2011-06-08 | 2011-06-08 | Capacitance touch screen and there is the contactor control device of this capacitance touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110152727.8A CN102819363B (en) | 2011-06-08 | 2011-06-08 | Capacitance touch screen and there is the contactor control device of this capacitance touch screen |
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| CN102819363A true CN102819363A (en) | 2012-12-12 |
| CN102819363B CN102819363B (en) | 2016-09-07 |
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| CN109564493A (en) * | 2016-07-19 | 2019-04-02 | 电子触控产品解决方案 | Projecting type capacitor (PCAP) touch screen |
| US11829183B2 (en) | 2016-07-19 | 2023-11-28 | Elo Touch Solutions, Inc. | Projected-capacitive (PCAP) touchscreen |
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| EP2113828A2 (en) * | 2008-04-30 | 2009-11-04 | TPO Displays Corp. | Display device with touch screen |
| CN101943975A (en) * | 2009-07-09 | 2011-01-12 | 敦泰科技有限公司 | Ultra-thin mutual capacitance touch screen and combined ultra-thin touch screen |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109564493A (en) * | 2016-07-19 | 2019-04-02 | 电子触控产品解决方案 | Projecting type capacitor (PCAP) touch screen |
| US11537234B2 (en) | 2016-07-19 | 2022-12-27 | Elo Touch Solutions, Inc. | Touchscreen with overlapping floating transparent conductive islands |
| US11829183B2 (en) | 2016-07-19 | 2023-11-28 | Elo Touch Solutions, Inc. | Projected-capacitive (PCAP) touchscreen |
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|---|---|
| CN102819363B (en) | 2016-09-07 |
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Effective date of registration: 20200103 Address after: 518119 1 Yanan Road, Kwai Chung street, Dapeng New District, Shenzhen, Guangdong Patentee after: SHENZHEN BYD MICROELECTRONICS Co.,Ltd. Address before: BYD 518118 Shenzhen Road, Guangdong province Pingshan New District No. 3009 Patentee before: BYD Co.,Ltd. |
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Address after: 518119 No.1 Yan'an Road, Kuiyong street, Dapeng New District, Shenzhen City, Guangdong Province Patentee after: BYD Semiconductor Co.,Ltd. Address before: 518119 No.1 Yan'an Road, Kuiyong street, Dapeng New District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN BYD MICROELECTRONICS Co.,Ltd. Address after: 518119 No.1 Yan'an Road, Kuiyong street, Dapeng New District, Shenzhen City, Guangdong Province Patentee after: BYD Semiconductor Co.,Ltd. Address before: 518119 No.1 Yan'an Road, Kuiyong street, Dapeng New District, Shenzhen City, Guangdong Province Patentee before: BYD Semiconductor Co.,Ltd. |