CN102819365A - 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
CN102819365A
CN102819365A CN2011101527634A CN201110152763A CN102819365A CN 102819365 A CN102819365 A CN 102819365A CN 2011101527634 A CN2011101527634 A CN 2011101527634A CN 201110152763 A CN201110152763 A CN 201110152763A CN 102819365 A CN102819365 A CN 102819365A
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receiving
conductive array
touch screen
capacitance touch
screen according
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CN2011101527634A
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CN102819365B (en
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李振刚
黄臣
杨云
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BYD Semiconductor Co Ltd
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BYD Co Ltd
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Abstract

The invention discloses a capacitive touch screen which comprises a transparent substrate, a first conductive array and a second conductive array. The first conductive array is arranged on the transparent substrate, is used for providing excitation signals and comprises a plurality of excitation components; and a preset angle is formed between the second conductive array and the first conductive array, the second conductive array comprises a plurality of receiving components which are used for receiving excitation signals provided by the excitation components, and received signal strengthening portions are arranged on portions, which are overlapped with the excitation components, of bodies of the receiving components, and are used for increasing excitation signal receiving areas of the receiving components. The invention further discloses a touch device with the capacitive touch screen. The excitation signal receiving areas of the receiving components can be increased and the excitation signal receiving ability of the receiving components can be improved by reasonably designing the structure of the second conductive array. In an actual manufacture process of products, cost can be saved, and properties of the products can be improved.

Description

Capacitance touch screen and contactor control device with it
Technical field
The present invention relates to the touch technology field, particularly relate to a kind of improved capacitance touch screen and contactor control device with it.
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.Touch-screen comprises electric resistance touch screen and capacitance touch screen.The demand of multiple point touching makes the favor that more and more receives product designer based on the theoretical touch product of mutual capacitance.
Capacitance touch screen is made up of transparency carrier and capacitive touch sensors usually.Fig. 7 is the planimetric map of double-deck capacitive touch sensors.Vertically black bar is the capacitance signal test side 100 ' of top layer, and laterally for pumping signal provides end 200 ', the two is vertical each other.During work, at first each circuit of the stimulated emission utmost point is sent into pumping signal in turn, repeating query detects the capacitance variations on each input end then.Through after the Data Detection of one-period, can correspondingly calculate the coordinate of touch action and touch point according to the data that obtain.
But in the layout of capacitive touch sensors shown in Figure 7, the area of capacitance signal test side is less, and then the area of reception pumping signal is also little.During near capacitance touch screen, controller can detect the regional little of mutual capacitance as object, and accuracy of detection is low.
Summary of the invention
The object of the invention is intended to solve at least one of above-mentioned technological deficiency.
For this reason, first purpose of the present invention is to propose a kind of capacitance touch screen that increases the pumping signal receiving ability.
Further, second purpose of the present invention is to propose a kind of contactor control device, and this contactor control device has improved pumping signal receiving ability.
For realizing above-mentioned purpose, the embodiment of first aspect of the 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, is used to provide pumping signal and comprises a plurality of driver units; 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, the body of wherein said receiving-member with the equitant position of said driver unit on be configured with and receive signal enhancing portion, be used to increase the receiving area that said receiving-member receives pumping signal.
According to the capacitance touch screen of the embodiment of the invention, can increase the zone of receiving-member reception pumping signal through the structure of rational design second conductive array, thereby increase the ability of the reception pumping signal of receiving-member.In the manufacture course of products of reality, can reduce production costs to a certain extent, enhance product performance.
The embodiment of second aspect present invention proposes a kind of contactor control device, comprises the capacitance touch screen that the embodiment of first aspect present invention provides; The one I/O interface group, each the I/O interface in the said I/O interface group links to each other with said first conductive array; The 2nd I/O interface group, each the I/O interface in said the 2nd I/O interface group links to each other with said second conductive array; And controller, said controller links to each other with the 2nd I/O interface group with a said I/O interface group respectively, the position that is touched according to the said touch-screen of change-detection of mutual capacitance between said first conductive array and said second conductive array.
Contactor control device according to the embodiment of the invention; Because receiving the area of pumping signal, second conductive array in the capacitance touch screen increases; Thereby increased the ability of receiving-member reception pumping signal; Increase the surveyed area of the variation of the mutual capacitance that detects first conductive array and second conductive array, improved the accuracy of detection and the sensing range 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 according to the capacitance touch screen of the embodiment of the invention;
Fig. 2 is the synoptic diagram according to the driver unit of the capacitance touch screen of the embodiment of the invention;
Fig. 3 is the partial schematic diagram according to the receiving-member of the capacitance touch screen of the embodiment of the invention;
Fig. 4 is the synoptic diagram of the capacitance touch screen of individual layer according to an embodiment of the invention;
Fig. 5 is the synoptic diagram of the capacitance touch screen of individual layer according to another embodiment of the invention;
Fig. 6 is the synoptic diagram according to the contactor control device of the embodiment of the invention;
Fig. 7 is the synoptic diagram of existing capacitance touch screen.
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.
Capacitance touch screen according to the embodiment of the invention comprises 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 receives signal enhancing portion, said reception signal strengthen cage structure with the equitant position of driver unit on, be used to increase the receiving area of the reception pumping signal of receiving-member.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 second conductive array below 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 carried out inserting to form capacitance touch screen 1000.
Referring to figs. 1 to Fig. 3 the capacitance touch screen 1000 according to the bilayer of the embodiment of the invention is described below.
As shown in Figure 1; First conductive array according to the capacitance touch screen 1000 of the bilayer of the embodiment of the invention comprises a plurality of driver units 100; Second conductive array comprises a plurality of receiving-members 200, and wherein, each receiving-member 200 comprises body 210 and receives signal enhancing portion 220.The body 210 of receiving-member 200 can be integrally formed with reception signal enhancing portion 220.Thus, should receive signal enhancing portion, thereby can increase the zone that receiving-member 200 receives pumping signal, increase the ability that receiving-member receives pumping signal through design.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 1000.To describe this capacitance touch screen 1000 below in detail.
A plurality of driver unit 100 parallel settings and the 200 parallel settings of a plurality of receiving-member.In an example of the present invention, driver unit 100 and receiving-member 200 vertical settings.As shown in Figure 1, (vertical direction among Fig. 1) parallel setting longitudinally of a plurality of driver units 100 and adjacent driver unit 100 are spaced apart.A plurality of receiving-members 200 are along laterally (horizontal direction among Fig. 1) parallel setting, and adjacent receiving-member 200 is spaced apart from each other.
The structure of each driver unit 100 can form solid body.Alternatively, driver unit 100 can form the body with hollow-out parts, as shown in Figure 2.
In an example of the present invention, each driver unit 100 can be strip.It is understandable that the shape of driver unit 100 is not limited thereto, also can be other shapes, for example circular, oval or trapezoidal etc.
A plurality of driver units 100 provide pumping signal to a plurality of receiving-members 200 in turn, and in other words, in the section, a plurality of receiving-members 200 receive the pumping signal that is provided by same driver unit 100 at one time.Thus, when object touches capacitance touch screen, coordinate that can high-precision locking touch point.
As shown in Figure 3, receive signal enhancing portion 220 and comprise first cantilever portion 221 and at least one second cantilever portion 222.In one embodiment of the invention, reception signal enhancing portion 220 forms 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 detection body 210.At least one second cantilever portion 222 is extended to the direction away from said first cantilever portion 221 from first cantilever portion 221.
In an example of the present invention, a plurality of second cantilever portion 222 are along mutually the same away from the direction length of first cantilever portion 221.
It is understandable that the length of a plurality of second cantilever portion 222 also can be different.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 body 210 symmetries of receiving-member, and the second cantilever 222b and the 3rd cantilever 222c are with respect to body 210 symmetries of receiving-member.
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 perpendicular to the length on first cantilever portion, 221 directions less than the second cantilever 222b.Thus, have the reception signal enhancing portion 220 of said structure, thereby increased the ability of receiving-member 200 reception signals through structure.But need to prove that the concrete structure of above-mentioned reception signal enhancing portion 220 is for exemplary purposes, rather than in order to limit protection scope of the present invention.
In addition, through the structure of design driver unit 100 and receiving-member 200, also can driver unit 100 and receiving-member 200 be arranged in on one deck.To combine Fig. 4 and Fig. 5 to describe capacitance touch screen 1000 in detail below with single layer structure.
With reference to figure 4 and Fig. 5 the individual layer capacitance touch screen 1000 according to the embodiment of the invention is described below.
First conductive array of individual layer capacitance touch screen 1000 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 4, first conductive array comprises driver unit Tx1, Tx2, Tx3 and Tx4, and second conductive array comprises receiving-member Rx1, Rx2 and Rx3.It is understandable that the structure of individual layer capacitance touch screen 1000 is not limited thereto, 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.
Each driver unit 100 all has hollow-out parts 110, and 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.Be 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 one embodiment of the invention, driver unit 100 comprises a plurality of driver unit sections that are one another in series and are electrically connected, and a plurality of driver unit sections are configured such that between the adjacent driver unit section can form hollow-out parts 110.The body 210 of receiving-member all is contained in the said hollow-out parts 110 with reception signal enhancing portion 220 on the body 210 that is formed on receiving-member.
In one embodiment of the invention, the signal enhancing portion 220 of receiving-member 200 can be configured to structure shown in Figure 3.In other words, receive signal enhancing portion 220 and comprise first cantilever portion 221 and at least one second cantilever portion 222.The first cantilever 222a and the 4th cantilever 222d be with respect to body 210 symmetries of receiving-member and along identical away from the direction length of first cantilever portion 221, and the second cantilever 222b and the 3rd cantilever 222c are with respect to body 210 symmetries of receiving-member and along identical away from the direction length of first cantilever portion 221.
Fig. 5 shows the structure of the isometric individual layer capacitance touch screen 1000 of second cantilever portion 222.As shown in Figure 5, a plurality of second cantilever portion 222 also can be mutually the same along the direction length away from first cantilever portion 221, and promptly the identical length of the first cantilever 222a, the second cantilever 222b, the 3rd cantilever 222c and the 4th cantilever 222d together.It is understandable that the structure of the signal enhancing portion 220 of receiving-member 200 is not limited thereto, the length of the first cantilever 222a, the second cantilever 222b, the 3rd cantilever 222c and the 4th cantilever 222d also can be all inequality or part is identical.
In one embodiment of the invention, adjacent driver unit section be electrically connected through metal jumper 300 and with receiving-member 200 electrical isolations.For example, metal jumper 300 can be the carbon film wire jumper.
The individual layer capacitance touch screen, has reduced the volume of capacitance touch screen, and has strengthened the receiving ability of signal, and practiced thrift cost because first conductive array and second conductive array are placed at grade with respect to the double-layer capacitance touch-screen.
According to the capacitance touch screen of the embodiment of the invention, can increase the zone of receiving-member reception pumping signal through the structure of rational design second conductive array, thereby increase the ability of receiving-member reception pumping signal.In the production of reality, can reduce production costs to a certain extent, enhance product performance.
The contactor control device of describing according to the embodiment of the invention with reference to figure 6 below.
As shown in Figure 6; Comprise capacitance touch screen that the above embodiment of the present invention provides 1000, an I/O interface group 2000, the 2nd I/O interface group 3000 and controller 4000 according to the contactor control device of the embodiment of the invention; Wherein each the I/O interface in the I/O interface group 2000 links to each other with said first conductive array; Each I/O interface in the 2nd I/O interface group 3000 links to each other with second conductive array; Controller 4000 links to each other with the 2nd I/O interface group 3000 with a said I/O interface group 2000 respectively, the position that is touched according to the said touch-screen of change-detection of mutual capacitance between said first conductive array and said second conductive array.
Second conductive array of capacitance touch screen 1000 has more signal receiving area, thereby has increased the receiving intensity of pumping signal.When touching object (like finger), increased the specific inductive capacity between first conductive array and the second conductive array electric capacity, thereby increased the electric capacity between first conductive array and second conductive array near capacitance touch screen 1000.Controller 4000 is gathered the quantity of electric charge of first conductive array and second conductive array through an I/O interface group 2000 and the 2nd I/O interface group 3000; Thereby calculate the mutual capacitance between first conductive array and second conductive array, and calculate the action and the touch action of the touch point that touches object according to the variable quantity of the mutual capacitance between first conductive array and second conductive array.Because second conductive array receives the area broadening of pumping signal, make controller 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.
Contactor control device according to the embodiment of the invention; Because receiving the area of pumping signal, second conductive array in the capacitance touch screen increases; Thereby increased the ability of receiving-member reception pumping signal; Increase the surveyed area of the variation of the mutual capacitance that detects first conductive array and second conductive array, improved the accuracy of detection and the sensing range of contactor control device.
In the description of this instructions, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means the concrete characteristic, structure, material or the characteristics that combine this embodiment or example to describe and is contained at least one embodiment of the present invention or the example.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete characteristic, structure, material or the characteristics of description can combine with suitable manner in any one or more embodiment or example.
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 (14)

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, is used to provide pumping signal and comprises a plurality of driver units;
Second conductive array, said second conductive array are 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,
The body of said receiving-member with the equitant position of said driver unit on be configured with and receive signal enhancing portion, be used 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 body of said driver unit, the shape of said hollow-out parts is configured to be suitable for to hold at least a portion of the body of said reception signal enhancing portion and said reception signal enhancing portion said receiving-member formed thereon.
3. capacitance touch screen according to claim 1 is characterized in that, said first conductive array is arranged on said second conductive array below and the predetermined distance of being separated by.
4. capacitance touch screen according to claim 2 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.
5. capacitance touch screen according to claim 2 is characterized in that, said reception signal enhancing portion comprises:
From vertical outward extending first cantilever portion of said receiving-member body; And
From said first cantilever portion towards at least one second cantilever portion of extending away from the direction of said first cantilever portion.
6. capacitance touch screen according to claim 5 is characterized in that, said reception signal enhancing portion comprises a plurality of second cantilever portion, and said a plurality of second cantilever portion is mutually the same along the direction length away from said first cantilever portion.
7. capacitance touch screen according to claim 5 is characterized in that, said reception signal enhancing portion forms with respect to the body of said receiving-member symmetrically.
8. capacitance touch screen according to claim 2 is characterized in that, has predetermined spacing between said reception signal enhancing portion and the said hollow-out parts.
9. capacitance touch screen according to claim 2 is characterized in that, at least a portion of the body of the said receiving-member that said reception signal enhancing portion and said reception signal enhancing portion are formed thereon is contained in the said hollow-out parts.
10. capacitance touch screen according to claim 9 is characterized in that, said driver unit comprises:
The a plurality of driver unit sections that are one another in series and are electrically connected, wherein said driver unit section are configured such that body that formed hollow-out parts between the said adjacent driver unit section holds said receiving-member and the said reception signal enhancing portion that forms above that.
11. capacitance touch screen according to claim 10 is characterized in that, said adjacent driver unit section be electrically connected through metal jumper and with said receiving-member electrical isolation.
12. capacitance touch screen according to claim 1 is characterized in that, said first conductive array and vertical setting of said second conductive array.
13. 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.
14. a contactor control device is characterized in that, comprising:
According to each described capacitance touch screen among the claim 1-13;
The one I/O interface group, each the I/O interface in the said I/O interface group links to each other with said first conductive array;
The 2nd I/O interface group, each the I/O interface in said the 2nd I/O interface group links to each other with said second conductive array; With
Controller, said controller link to each other with the 2nd I/O interface group with a said I/O interface group respectively, the position that is touched according to the said touch-screen of change-detection of mutual capacitance between said first conductive array and said second conductive array.
CN201110152763.4A 2011-06-08 2011-06-08 Capacitive touch screen and touch device with same Active CN102819365B (en)

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Citations (4)

* 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
CN202142036U (en) * 2011-06-08 2012-02-08 比亚迪股份有限公司 Capacitive touch screen and touch device having the same

Patent Citations (4)

* 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
CN202142036U (en) * 2011-06-08 2012-02-08 比亚迪股份有限公司 Capacitive touch screen and touch device having the same

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