CN101324826A - Object positioning detection machine of touch control plate - Google Patents
Object positioning detection machine of touch control plate Download PDFInfo
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- CN101324826A CN101324826A CNA2007101086809A CN200710108680A CN101324826A CN 101324826 A CN101324826 A CN 101324826A CN A2007101086809 A CNA2007101086809 A CN A2007101086809A CN 200710108680 A CN200710108680 A CN 200710108680A CN 101324826 A CN101324826 A CN 101324826A
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Abstract
The invention relates to an object positioning detector of a touch pad, which is characterized in that the object positioning detector is provided with at least one capacitive sensing element group, the capacitive sensing element group comprises two adjacent capacitive sensing elements, and the capacitive sensing element group is arranged along an axial direction so as to allow one capacitive sensing element to gradually increase the capacitance value in a gradient manner along the axial direction, and allow the other capacitive sensing element to gradually decrease the capacitance value in a gradient manner along the axial direction. In the object positioning detector, the object position of the two-dimensional touch pad can be detected by adopting the one-dimensional capacitive sensing elements, and thereby the object positioning detector is very practical.
Description
Technical field
The present invention relates to a kind of object positioning detection machine of Trackpad, particularly relate to a kind of object positioning detection machine that utilizes one dimension capacitive sensing element to form two-dimentional Trackpad.
Background technology
The application of touch control screen is very extensive, for example visitor's guide system, ATM (Automatic Teller Machine), point-of-sale terminals, industrial control system etc.Because this interface is easy to use, durable in use, and its cost is not high, so market is also among constantly growing up.
Touch control screen can be divided into three kinds according to the physical principle of its detecting touch point: the resistance-type screen will produce voltage with finger or other contact flickings; The condenser type screen, finger can be drawn small electric current (Trackpad that is usually used in notebook computer).As for the third fluctuation formula screen, then be to cover whole surface, and finger or contact can be blocked these standing wave patterns with sound wave or infrared ray.
Seeing also shown in Figure 1ly, is the synoptic diagram of the object positioning detection machine of the existing two-dimentional capacitive sensing element Trackpad of commonly using.In Fig. 1, when finger or other contact flicking Trackpads, the capacitive sensing element 12,14 of institute's opsition dependent produces capacitive coupling because of electric field, can produce the capacitance variations value drawing small electric current, when all capacitive sensing elements 12,14 of scanning X-axis (first dimension) and Y-axis (second dimension), be the position of finger or other contact flicking Trackpads that detects in the X-axis of the capacitance variations value that is produced and the position of Y-axis, and located.The layout type of object positioning detection machine 10 is to be two-dimentional solid diamond, hexagon or other shapes.
Except the layout structure of Fig. 1 object positioning detection machine, also available other novel layout structures are realized the object positioning detection machine of capacitive sensing element.
But, the object positioning detection machine of above-mentioned existing Trackpad has following defective: this object positioning detection machine must utilize two groups of capacitive sensing elements that intersect vertically just can carry out the location of two dimension, therefore can't effectively reduce the use of related elements material, moreover two groups of capacitive sensing elements that intersect vertically seem that also some is numerous and diverse in making and assembling formality.This shows that the object positioning detection machine of above-mentioned existing Trackpad obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.The problem that exists for the object positioning detection machine that solves Trackpad, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product does not have appropriate structure to address the above problem, and this obviously is the problem that the anxious desire of relevant dealer solves.Therefore how to found a kind of object positioning detection machine of Trackpad of new structure, real one of the current important research and development problem that belongs to, also becoming the current industry utmost point needs improved target.
Because the defective that the object positioning detection machine of above-mentioned existing Trackpad exists, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, and the utilization of cooperation scientific principle, actively studied innovation, object positioning detection machine in the hope of the Trackpad of founding a kind of new structure, can improve the object positioning detection machine of general existing Trackpad, make it have more practicality.Through constantly research, design, and after studying sample and improvement repeatedly, create the present invention who has practical value finally.
Summary of the invention
The objective of the invention is to, overcome the existing defective of object positioning detection machine of existing Trackpad, and provide a kind of object positioning detection machine of Trackpad of new structure, technical matters to be solved is to make it utilize one dimension capacitive sensing element can detect the object position of two-dimentional Trackpad, is very suitable for practicality.
The object of the invention to solve the technical problems realizes by the following technical solutions.The object positioning detection machine of a kind of Trackpad that proposes according to the present invention, this object positioning detection machine has at least one capacitive sensing element group, this capacitive sensing element group comprises two adjacent capacitive sensing elements, this capacitive sensing element group is prolonging an axial array so that a capacitive sensing element wherein axially increases progressively capacitance with gradient along this, and make another capacitive sensing element along this axially with the gradient capacitance that successively decreases.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The object positioning detection machine of aforesaid Trackpad, one capacitive sensing element of wherein said capacitive sensing element group measured capacitance when object is touched is CXodd, and its another capacitive sensing element measured capacitance when object is touched is CXeven, and each capacitive sensing element group measured sum total capacitance Ctot=(CXeven+CXodd) when object is touched is rough identical.
The object positioning detection machine of aforesaid Trackpad, wherein in scanning when detecting that wherein the sum total capacitance of a capacitive sensing element group is Ctot, judge that this capacitive sensing element group is the position of first dimension of object touching; And judge the position of second dimension of object touching with (CXeven-CXodd)/Ctot, the CXeven/Ctot of this capacitive sensing element group and one of them ratio of CXodd/Ctot.
The object positioning detection machine of aforesaid Trackpad, one capacitive sensing element of wherein said capacitive sensing element group axially comes gradient to increase progressively its capacitance with the electric capacity branch of linear along this, and another capacitive sensing element axially comes gradient its capacitance that successively decreases with the electric capacity branch of linear along this.
The object positioning detection machine of aforesaid Trackpad, one capacitive sensing element of wherein said capacitive sensing element group axially comes gradient to increase progressively its capacitance with leg-of-mutton electric capacity branch along this, and another capacitive sensing element axially comes gradient its capacitance that successively decreases with leg-of-mutton electric capacity branch along this.
The object positioning detection machine of aforesaid Trackpad, one capacitive sensing element of wherein said capacitive sensing element group axially comes gradient to increase progressively its capacitance with the electric capacity branch of rectangle along this, and another capacitive sensing element axially comes gradient its capacitance that successively decreases with the electric capacity branch of rectangle along this.
The object positioning detection machine of aforesaid Trackpad, one capacitive sensing element of wherein said capacitive sensing element group axially comes gradient to increase progressively its capacitance with the electric capacity branch of mosquito-repellent incense ring-type along this, and another capacitive sensing element axially comes gradient its capacitance that successively decreases with the electric capacity branch of mosquito-repellent incense ring-type along this.
The present invention compared with prior art has tangible advantage and beneficial effect.As known from the above, for achieving the above object, the present invention proposes a kind of object positioning detection machine of Trackpad, it is characterized by: this object positioning detection machine has at least one capacitive sensing element group, this capacitive sensing element group comprises two adjacent capacitive sensing elements, this capacitive sensing element group is prolonging an axial array so that a capacitive sensing element wherein axially increases progressively capacitance with gradient along this, and make another capacitive sensing element along this axially with the gradient capacitance that successively decreases.
In one embodiment of this invention, one capacitive sensing element of this capacitive sensing element group measured capacitance when object is touched is CXodd, and another capacitive sensing element measured capacitance when object is touched is CXeven, and each capacitive sensing element group measured sum total capacitance Ctot=(CXeven+CXodd) when object is touched is rough identical.
In one embodiment of this invention, be with in scanning when detecting that wherein the sum total capacitance of a capacitive sensing element group is Ctot, judge that this capacitive sensing element group is the position of first dimension of object touching; And judge the position of second dimension of object touching with (CXeven-CXodd)/Ctot, the CXeven/Ctot of this capacitive sensing element group and one of them ratio of CXodd/Ctot.
In one embodiment of this invention, one capacitive sensing element of this capacitive sensing element group axially comes gradient to increase progressively its capacitance with the electric capacity branch of linear along this, and another capacitive sensing element axially comes gradient its capacitance that successively decreases with the electric capacity branch of linear along this.
In another embodiment of the present invention, one capacitive sensing element of this capacitive sensing element group axially comes gradient to increase progressively its capacitance with leg-of-mutton electric capacity branch along this, and another capacitive sensing element axially comes gradient its capacitance that successively decreases with leg-of-mutton electric capacity branch along this.
In another embodiment of the present invention, one capacitive sensing element of this capacitive sensing element group axially comes gradient to increase progressively its capacitance with the electric capacity branch of rectangle along this, and another capacitive sensing element axially comes gradient its capacitance that successively decreases with the electric capacity branch of rectangle along this.
In another embodiment of the present invention, one capacitive sensing element of this capacitive sensing element group axially comes gradient to increase progressively its capacitance with the electric capacity branch of mosquito-repellent incense ring-type along this, and another capacitive sensing element axially comes gradient its capacitance that successively decreases with the electric capacity branch of mosquito-repellent incense ring-type along this.
By technique scheme, the object positioning detection machine of Trackpad of the present invention has following advantage and beneficial effect at least: the present invention utilizes one dimension capacitive sensing element can detect the object position of two-dimentional Trackpad, is very suitable for practicality.Because the capacitive sensing element is to arrange with same direction, can make that therefore manufacturing and linkage editor are more simple and easy.In addition, be respectively the demand that two groups of capacitive sensing elements that increase progressively and successively decrease also can reduce the integral capacitor material, reduce and make required cost.
In sum, the object positioning detection machine of the Trackpad of novelty of the present invention, no matter bigger improvement is all arranged on product structure or function, obvious improvement is arranged technically, and produced handy and practical effect, and the object positioning detection machine of more existing Trackpad has the outstanding effect of enhancement, thereby is suitable for practicality more, really is a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is the synoptic diagram of the object positioning detection machine of the existing two-dimentional capacitive sensing element Trackpad of commonly using.
Fig. 2 is the synoptic diagram that the one dimension capacitive sensing element of first embodiment of the invention is formed the object positioning detection machine of two-dimentional Trackpad.
Fig. 3 is the capacitance variations value of one dimension capacitive sensing element of the present invention and the curve map of sum total capacitance thereof.
Fig. 4 is the curve map of the differential mode capacitor value of one dimension capacitive sensing element of the present invention.
Fig. 5 is the synoptic diagram that the one dimension capacitive sensing element of second embodiment of the invention is formed the object positioning detection machine of two-dimentional Trackpad.
Fig. 6 is the synoptic diagram that the one dimension capacitive sensing element of third embodiment of the invention is formed the object positioning detection machine of two-dimentional Trackpad.
Fig. 7 is the synoptic diagram that the one dimension capacitive sensing element of fourth embodiment of the invention is formed the object positioning detection machine of two-dimentional Trackpad.
10,20,30,40,50: object positioning detection machine
12,14,22,24,32,34,42,44,52,54: electric capacity branch
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, its embodiment of object positioning detection machine, structure, feature and the effect thereof of the Trackpad that foundation the present invention is proposed, describe in detail as after.
Relevant aforementioned and other technology contents, characteristics and effect of the present invention can clearly present in the following detailed description that cooperates with reference to graphic preferred embodiment.For convenience of description, in following embodiment, components identical is represented with identical numbering.
Seeing also shown in Figure 2ly, is the synoptic diagram that the one dimension capacitive sensing element of first embodiment of the invention is formed the object positioning detection machine of two-dimentional Trackpad.In Fig. 2, the object positioning detection machine 20 of Trackpad, have X1, X2 ..., many capacitive sensing elements such as Xn, Xn+1, in addition, each odd number bar capacitive sensing element (X1, X3 ..., Xn) respectively by a plurality of electric capacity branch 22 form, and each even number bar capacitive sensing element (X2, X4 ..., Xn+1) then respectively by a plurality of electric capacity branch 24 form.Moreover, be to form a capacitive sensing element group in the present embodiment with two adjacent capacitive sensing elements, for example: capacitive sensing element X1 and X2 form a capacitive sensing element group, and other are by that analogy.
In the present embodiment, capacitive sensing element X1, the X3 of odd number bar ..., Xn etc. electric capacity branch 22, be along transverse axis (in different embodiment, the capacitive sensing element can vertical axis disposes) come gradient to increase progressively its capacitance density with linear, and capacitive sensing element X2, the X4 of even number bar ..., Xn+1 etc. electric capacity branch 24, then come gradient its capacitance density that successively decreases with linear along transverse axis.Because capacitance is directly proportional with area, the electric capacity branch of linear increases progressively its capacitance because of its area that increases progressively, relatively, and its capacitance that will successively decrease that successively decreases of electric capacity branch area.
See also shown in Figure 3, be one dimension capacitive sensing element of the present invention the capacitance variations value and the sum total capacitance curve map.In Fig. 3, become a capacitive sensing element group with two capacitive sensing elements and progressively scan whole object positioning detection machine 20.Illustrate, the capacitance (as the described capacitance variations value of previous prior art) that detects object (as finger) position (position of flicking Trackpad) at scanning capacitance sensing element X3 is CXodd, with the capacitance of detecting the object position at scanning capacitance sensing element X4 be CXeven.
According to above-mentioned, design in one embodiment of the invention makes object when arbitrary capacitive sensing element group (for example object touching capacitive sensing element X1 and X2) of touching object positioning detection machine 20, the sum total capacitance Ctot=(CXeven+CXodd) that all can obtain identical size is touched in arbitrary position at its transverse axis, and this sum total capacitance is different with the last measured sum total capacitance of the capacitive sensing element group of never being touched by object (other capacitive sensing elements except object touching capacitive sensing element X1 and X2).In other words, resulting sum total capacitance when object is touched the capacitive sensing element group of being made up of capacitive sensing element X1 and X2, resulting sum total capacitance is identical when can touch the capacitive sensing element group of being made up of capacitive sensing element X3 and X4 with object.By this, just can orient the position (just touch in which capacitive sensing element group on) of object in first dimension space via the sum total capacitance of each capacitive sensing element group of detecting.
Seeing also shown in Figure 4ly, is the curve map of the differential mode capacitor value of one dimension capacitive sensing element of the present invention.In Fig. 4, suppose that the object touching is on the capacitive sensing element group of being made up of capacitive sensing element X1 and X2, in view of the above, when scanning capacitive sensing element X1, X2, just capacitance CXeven, CXodd and the Ctot of the position of capacitive sensing element X1, the X2 that can touch according to object calculate arbitrary ratio of (CXeven-CXodd)/Ctot, CXeven/Ctot or CXodd/Ctot respectively, and judge that according to this ratio object touches the relevant position (that is object is in position of second dimension) in capacitive sensing element X1, X2.For example, when CXodd/Ctot was 1/3, the position of decidable object touching was in capacitive sensing element X1 1/3 position from left to right, or said so in capacitive sensing element X2 2/3 position from right to left.
According to this kind mode, the present invention can utilize the layout structure of the object positioning detection machine of one dimension capacitive sensing element, form a capacitive sensing element group with two capacitive sensing elements, according to the capacitance sum total and capacitance differential mode of this capacitive sensing element group, detect the position of the two dimension of object on Trackpad.
Method for detecting and principle according to the touching of the object of above-mentioned capacitive sensing element group, shape configuration for the electric capacity branch of conversion capacitive sensing element group, as long as in the included two adjacent capacitive sensing elements of each capacitive sensing element group, one of them the capacitive sensing element that is prolonging an axial array axially increases progressively capacitance with gradient along this, and make another capacitive sensing element along this axially with the gradient capacitance that successively decreases, the shape configuration of any electric capacity branch all is applicable to the method for detecting and the principle of the object touching of above-mentioned capacitive sensing element group.See also shown in Figure 5, it is the synoptic diagram that the one dimension capacitive sensing element of second embodiment of the invention is formed the object positioning detection machine of two-dimentional Trackpad, as shown in Figure 5, the object positioning detection machine 30 of Trackpad, have many capacitive sensing element X1, X2 ..., Xn+1, Xn+2 to be suitably to form capacitive sensing element group, for example: capacitive sensing element X1 and capacitive sensing element X2 form a capacitive sensing element group, and other then are by that analogy.Capacitive sensing element X1, the X3 of each odd number bar ..., Xn+1 along transverse axis (in different embodiment, the capacitive sensing element can vertical axis disposes) come gradient to increase progressively its capacitance density with leg-of-mutton electric capacity branch 32, each even number bar capacitive sensing element X2, X4 ..., Xn+2 comes gradient its capacitance density that successively decreases along transverse axis with leg-of-mutton electric capacity branch 34.Because capacitance is directly proportional with area, leg-of-mutton electric capacity branch is after the area that increases progressively is multiplied by fixing capacitance density that is increase progressively its capacitance, relatively, leg-of-mutton electric capacity branch also is its capacitance that successively decreases at the product that the area that successively decreases is multiplied by fixing capacitance density.
Similarly, seeing also shown in Figure 6ly, is the synoptic diagram that the one dimension capacitive sensing element of third embodiment of the invention is formed the object positioning detection machine of two-dimentional Trackpad.In Fig. 6, the object positioning detection machine 40 of Trackpad have many capacitive sensing element X1, X2 ..., Xn+1, Xn+2 to be suitably to form capacitive sensing element group, for example: capacitive sensing element X1 and capacitive sensing element X2 form a capacitive sensing element group, and other by that analogy.Each odd number bar capacitive sensing element X1, X3 ..., Xn+1 along transverse axis (in different embodiment, the capacitive sensing element can vertical axis disposes) come gradient to increase progressively its capacitance density with the electric capacity branch 42 of rectangle, each even number bar capacitive sensing element X2, X4 ..., Xn+2 comes gradient its capacitance density that successively decreases along transverse axis with the electric capacity branch 44 of rectangle.Because capacitance is directly proportional with area, the product that the electric capacity branch of rectangle is multiplied by fixing capacitance density at the area that increases progressively also is and increases progressively its capacitance, relatively, the electric capacity branch of rectangle also is its capacitance that successively decreases at the product that the area that successively decreases is multiplied by fixing capacitance density.
Moreover, see also shown in Figure 7ly, be the synoptic diagram that the one dimension capacitive sensing element of fourth embodiment of the invention is formed the object positioning detection machine of two-dimentional Trackpad.In Fig. 7, the object positioning detection machine 50 of Trackpad have many capacitive sensing element X1, X2 ..., Xn+1, Xn+2 to be suitably to form capacitive sensing element group, for example: capacitive sensing element X1 and capacitive sensing element X2 form a capacitive sensing element group, and other by that analogy.Each odd number bar capacitive sensing element X1, X3 ..., Xn+1 along transverse axis (in different embodiment, the capacitive sensing element can vertical axis disposes) come gradient to increase progressively its capacitance density with the electric capacity branch 52 of mosquito-repellent incense ring-type, each even number bar capacitive sensing element X2, X4 ..., Xn+2 comes gradient its capacitance density that successively decreases along transverse axis with the electric capacity branch 54 of mosquito-repellent incense ring-type.Because capacitance is directly proportional with area, the product that the electric capacity branch of mosquito-repellent incense ring-type is multiplied by fixing capacitance density at the area that increases progressively also is and increases progressively its capacitance, relatively, the electric capacity branch of mosquito-repellent incense ring-type also is its capacitance that successively decreases at the product that the area that successively decreases is multiplied by fixing capacitance density.
As previously discussed, the invention provides a kind of object positioning detection machine of Trackpad of novelty, it utilizes one dimension capacitive sensing element can detect the object position of two-dimentional Trackpad.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not by the present invention that above-mentioned explanation limits, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, can make various specific illustrations under spirit of the present invention and the essential characteristic not leaving, in every case be the content that does not break away from technical solution of the present invention, foundation technical spirit of the present invention is to above any simple modification that embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (7)
1, a kind of object positioning detection machine of Trackpad, it is characterized in that this object positioning detection machine has at least one capacitive sensing element group, this capacitive sensing element group comprises two adjacent capacitive sensing elements, this capacitive sensing element group is prolonging an axial array so that a capacitive sensing element wherein axially increases progressively capacitance with gradient along this, and make another capacitive sensing element along this axially with the gradient capacitance that successively decreases.
2, the object positioning detection machine of Trackpad according to claim 1, the a capacitive sensing element measured capacitance when object is touched that it is characterized in that wherein said capacitive sensing element group is CXodd, and its another capacitive sensing element measured capacitance when object is touched is CXeven, and each capacitive sensing element group measured sum total capacitance Ctot=(CXeven+CXodd) when object is touched is rough identical.
3, the object positioning detection machine of Trackpad according to claim 2, it is characterized in that wherein in scanning judging that this capacitive sensing element group is the position of first dimension of object touching when detecting that wherein the sum total capacitance of a capacitive sensing element group is Ctot; And judge the position of second dimension of object touching with (CXeven-CXodd)/Ctot, the CXeven/Ctot of this capacitive sensing element group and one of them ratio of CXodd/Ctot.
4, the object positioning detection machine of Trackpad according to claim 1, a capacitive sensing element that it is characterized in that wherein said capacitive sensing element group axially comes gradient to increase progressively its capacitance with the electric capacity branch of linear along this, and another capacitive sensing element axially comes gradient its capacitance that successively decreases with the electric capacity branch of linear along this.
5, the object positioning detection machine of Trackpad according to claim 1, a capacitive sensing element that it is characterized in that wherein said capacitive sensing element group axially comes gradient to increase progressively its capacitance with leg-of-mutton electric capacity branch along this, and another capacitive sensing element axially comes gradient its capacitance that successively decreases with leg-of-mutton electric capacity branch along this.
6, the object positioning detection machine of Trackpad according to claim 1, a capacitive sensing element that it is characterized in that wherein said capacitive sensing element group axially comes gradient to increase progressively its capacitance with the electric capacity branch of rectangle along this, and another capacitive sensing element axially comes gradient its capacitance that successively decreases with the electric capacity branch of rectangle along this.
7, the object positioning detection machine of Trackpad according to claim 1, a capacitive sensing element that it is characterized in that wherein said capacitive sensing element group axially comes gradient to increase progressively its capacitance with the electric capacity branch of mosquito-repellent incense ring-type along this, and another capacitive sensing element axially comes gradient its capacitance that successively decreases with the electric capacity branch of mosquito-repellent incense ring-type along this.
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| CNA2007101086809A CN101324826A (en) | 2007-06-14 | 2007-06-14 | Object positioning detection machine of touch control plate |
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| CNA2007101086809A CN101324826A (en) | 2007-06-14 | 2007-06-14 | Object positioning detection machine of touch control plate |
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