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.
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.