CN102819363B - Capacitance touch screen and there is the contactor control device of this capacitance touch screen - Google Patents
Capacitance touch screen and there is the contactor control device of this capacitance touch screen Download PDFInfo
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- CN102819363B CN102819363B CN201110152727.8A CN201110152727A CN102819363B CN 102819363 B CN102819363 B CN 102819363B CN 201110152727 A CN201110152727 A CN 201110152727A CN 102819363 B CN102819363 B CN 102819363B
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Abstract
The present invention proposes a kind of capacitance touch screen, including: transparency carrier；The first conductive array on the transparent substrate is set, including multiple for providing the driver unit of pumping signal；Second conductive array, is arranged to become with the first conductive array predetermined angular, and includes the multiple reception parts for receiving the pumping signal that the plurality of driver unit provides, and wherein said reception parts include: body；And the reception signal enhanced portion being connected with body, described reception signal enhanced portion stretches out from the equitant position of body and driver unit, and has multiple rectilinear branches becoming predetermined angular with body, receives parts receive the receiving area of pumping signal to increase.The present invention also proposes a kind of contactor control device with above-mentioned capacitance touch screen.The capacitance touch screen of the present invention, by changing the shape receiving parts, can increase the mutual capacitance variable quantity received between parts and driver unit, improve signal to noise ratio and the linearity.
Description
Technical field
The present invention relates to technical field of touch control, particularly to the capacitance touch screen of a kind of improvement and have this capacitance touch screen
Contactor control device.
Background technology
Touch-screen utilizes the feature that its mechanical loss is little and volume is little, has been widely used in each electronic product.Often
The touch-screen seen has self-capacitance and mutual capacitance printed circuit board arrangement.Self-capacitance can only realize single-touch, if two point
Touch can produce " ghost point ".Therefore, the application of mutual capacitance type printed circuit board arrangement is the most extensive.
Fig. 1 is the plane of existing double-deck mutual capacitance type printed circuit board arrangement.Longitudinal black bar is top layer
Capacitance signal test side 200 ', laterally for pumping signal provide end 100 ', the two is mutually perpendicular to.When touching object (as
Finger) when not touching screen, pumping signal provides the negative electrical charge of the main absorption detecting end 200 ' of end 100 ', both formation
Capacitance be C1.When touching object (such as finger) touches screen, owing to a big chunk pumping signal provides end
100 ' distance signal test sides 200 ' are farther out and finger is relatively near, therefore can transfer to absorb the negative electrical charge on finger, correspondingly
The electric charge of absorption signal test side 200 ' will reduce, therefore signal detection end 200 ' and pumping signal provide end 100 ' it
Between formed mutual capacitance can reduce.Size by corresponding testing circuit detection mutual capacitance variable quantity, it can be determined that connect
Whether is effectively contact, and by corresponding computational methods can calculate finger coordinate on screen, it is achieved fixed if touching
Position.Therefore, even if there being multiple touch point on screen, the true coordinate of each touch point can also be calculated.
The signal detection end of existing mutual capacitance type touch screen and pumping signal provide the arrangement of end there is a problem in that
When touching object (such as finger) is between two signal detection ends, or only carry close to one of them pumping signal
For end time, another pumping signal provide end by the most small sensing, therefore induced signal will not be formed stablize accurate
Linear change, thus produce position error.
Additionally, mutual capacitance type touch screen includes individual layer mutual capacitance type touch screen and double-deck mutual capacitance type touch screen.Double-deck mutual
Although the Trackpad low cost of the cost of capacitive touch screen relatively four layers or three layers circuit structure, but still cannot meet
User's requirement to price.Although the cost of individual layer mutual capacitance type touch screen is the lowest, but capacitance sensor output
Capacitance change is the least, and wherein there is stray capacitance, and stray capacitance can be divided with temperature, position, inner electric field and outer electric field
The factors such as cloth affect and change, and measured capacitance signal is even flooded in interference, cause sensing touch and location
Touch point.
Summary of the invention
The purpose of the present invention is intended at least solve one of above-mentioned technological deficiency.
For reaching above-mentioned purpose, first aspect present invention proposes a kind of capacitance touch screen, including: transparency carrier；First
Conductive array, described first conductive array is arranged on described transparency carrier, and described first conductive array includes multiple
Driver unit, the plurality of driver unit is used for providing pumping signal；Second conductive array, described second conductive array
It is arranged to become with described first conductive array predetermined angular, and described second conductive array includes multiple reception parts, institute
State multiple reception parts for receiving the pumping signal that the plurality of driver unit provides, wherein, described reception parts bag
Include: body；And the reception signal enhanced portion being connected with described body, described reception signal enhanced portion from described body with
The equitant position of described driver unit stretches out, and described reception signal enhanced portion has multiple and described body and becomes
The rectilinear branches of predetermined angular, to increase the receiving area of described reception parts reception pumping signal.
Capacitance touch screen according to embodiments of the present invention, by changing the shape receiving parts, can increase reception parts
And the mutual capacitance variable quantity between driver unit, improve signal to noise ratio and the linearity.
Second aspect present invention proposes a kind of contactor control device, including: capacitance touch described according to a first aspect of the present invention
Screen；Oneth I/O interface group, each I/O interface and a driver unit in a described I/O interface group are connected；
2nd I/O interface group, each I/O interface and reception parts in described 2nd I/O interface group are connected；With
Controller, described controller is connected with a described I/O interface group and the 2nd I/O interface group respectively, according to described reception
The variable quantity of mutual capacitance between parts and driver unit detects the position that described touch-screen is touched.
Contactor control device according to embodiments of the present invention, by using the capacitance touch screen of said structure, adds detection and connects
Receive the region of the variable quantity of the mutual capacitance of parts and driver unit, make the coordinate of touch point calculate the most accurate, improve
The positioning precision of contactor control device.
Aspect and advantage that the present invention adds will part be given in the following description, and part will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Accompanying drawing explanation
The present invention above-mentioned and/or that add aspect and advantage will become bright from the following description of the accompanying drawings of embodiments
Aobvious and easy to understand, wherein:
Fig. 1 is the schematic diagram of existing double-deck mutual capacitance type printed circuit board arrangement；
Fig. 2 is the mutual capacitance type individual layer schematic diagram without chinampa touch screen structure of one embodiment of the invention；
Fig. 3 is the schematic diagram receiving parts of the capacitance touch screen of the embodiment of the present invention；
Fig. 4 is the schematic diagram of the driver unit of the capacitance touch screen of the embodiment of the present invention；
Fig. 5 is the mutual capacitance type individual layer of one embodiment of the invention and has the schematic diagram of touch screen structure on chinampa；
Fig. 6 is the mutual capacitance type bilayer schematic diagram without the touch screen structure on chinampa of one embodiment of the invention；
Fig. 7 is that the mutual capacitance type of one embodiment of the invention is double-deck and have the schematic diagram of touch screen structure on chinampa；
Fig. 8 is that the mutual capacitance type of another embodiment of the present invention is double-deck and have the schematic diagram of touch screen structure on chinampa；With
And
Fig. 9 is the structural representation of the contactor control device of the embodiment of the present invention.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most from start to finish
Same or similar label represents same or similar element or has the element of same or like function.Below by ginseng
The embodiment examining accompanying drawing description is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.
In describing the invention, it is to be understood that term " longitudinally ", " laterally ", " on ", D score,
"front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ",
Orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, are for only for ease of and retouch
State the present invention and simplifying describe rather than instruction or the hint device of indication or element must have specific orientation, with
Specific azimuth configuration and operation, be therefore not considered as limiting the invention.
In describing the invention, it should be noted that unless otherwise prescribed and limit, term " is installed ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be mechanically connected or electrically connect, it is also possible to be two elements
Internal connection, can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, for the common skill of this area
For art personnel, the concrete meaning of above-mentioned term can be understood as the case may be.
Capacitance touch screen according to embodiments of the present invention, including transparency carrier, the first conductive array and the second conductive array.
First conductive array arranges on the transparent substrate and includes multiple driver unit, is used for providing pumping signal.Second conduction
Array and the first conductive array become predetermined angular and include multiple reception parts, are used for receiving the plurality of driver unit and carry
The pumping signal of confession.Each reception parts include body and the reception signal enhanced portion being connected with body, and described reception is believed
Number enhanced portion stretches out from the equitant position of body and driver unit, and receive signal enhanced portion have multiple with
Body becomes the rectilinear branches of predetermined angular, to increase the receiving area receiving parts reception pumping signal.
In an example of the present invention, described predetermined angular can be 90 degree, the i.e. first conductive array and the second conduction
Array is vertically arranged.
First conductive array and the second conductive array may be located at two planes and can also be generally aligned in the same plane.
When the first conductive array and the second conductive array are positioned at two planes, the first conductive array is arranged on the second conduction
The lower section of array and be separated by predetermined distance, such that it is able to realize insulating between the first conductive array and the second conductive array.
When the first conductive array and the second conductive array are generally aligned in the same plane, the first conductive array and the second conductive array
To inserting to form capacitance touch screen.
Below with reference to Fig. 2 to Fig. 5, individual layer capacitance touch screen according to embodiments of the present invention is described.
First conductive array of individual layer capacitance touch screen includes multiple driver unit 100, and the second conductive array includes multiple connecing
Receive parts 200, by parts 200 will be received to being inserted in the hollow-out parts 110 of driver unit 100 realization.Such as Fig. 2
Shown in, the first conductive array includes that driver unit Tx1, Tx2 and Tx3, the second conductive array include receiving parts Rx1
And Rx2.Each reception parts include body 210 and the reception signal enhanced portion 220 being connected with body 210, and receive
Signal enhanced portion 220 has multiple rectilinear branches becoming predetermined angular with body 210.Receive the body 210 of parts 200
May be integrally formed with receiving signal enhanced portion 220.Driver unit 100 is overlapping with the body 210 receiving parts
Position disconnect, and by wire jumper 300 be electrically connected and with receive parts 200 electric insulation.Such as, wire jumper 300
It can be carbon film wire jumper.It is understood that be only for schematic example, receive the body 210 of parts with sharp
The equitant position of non-hollow-out parts encouraging parts disconnects, and is electrically connected by wire jumper 300.
Thus, by designing the reception signal enhanced portion of above-mentioned shape, reception parts 200 can be increased and receive excitation letter
Number receiving area, thus increase the capacitance change received between parts 200 and driver unit 100.In reality
In manufacture course of products, it is possible to reduce production cost to a certain extent, and improve the product utilizing this capacitance touch screen
Performance.
The driver unit of capacitance touch screen is described more fully below and receives parts.
In an example of the present invention, multiple driver units 100 be set parallel to each other and multiple reception parts 200 that
This be arranged in parallel.In another example of the present invention, driver unit 100 and reception parts 200 are vertically arranged.As
Shown in Fig. 2, multiple driver unit Tx1, Tx2 and Tx3 transversely (horizontal direction in Fig. 2) are set parallel to each other
And adjacent driver unit is spaced apart.Multiple reception parts Rx1 and Rx2 along longitudinally (vertical direction in Fig. 2) that
This be arranged in parallel, and adjacent reception parts are spaced apart from each other.
As it is shown on figure 3, receive signal enhanced portion 220 to include two rectilinear branches 221 and 222.Each rectilinear branches with
The body 210 of reception parts becomes predetermined angle.In one embodiment of the invention, signal enhanced portion 220 is received
It is asymmetrically formed relative to the body 210 receiving parts.Two rectilinear branches can be all strip.
In one embodiment of the invention, two rectilinear branches 221 are identical with the length of 222.
As shown in Figure 4, each driver unit is respectively provided with hollow-out parts 110, and the shape design of hollow-out parts 110 becomes to be suitable to accommodate
Receive signal enhanced portion 220 and be formed with the body 210 receiving parts receiving signal enhanced portion 220 at least one
Point, signal enhanced portion 220 will be received and be formed with the body 210 of the reception parts receiving signal enhanced portion 220 extremely
A few part is contained in hollow-out parts 110.Wherein, receive have between signal enhanced portion 220 and hollow-out parts 110 pre-
Fixed spacing, such that it is able to realize the first conductive array and the insulation of the second conductive array.
Furthermore, it is possible to single-layer touch screen receive embed between parts and driver unit a kind of independent conductive medium from
And increase the variable quantity of mutual capacitance.It is illustrated in figure 5 the mutual capacitance type individual layer of one embodiment of the invention and is tied by chinampa
The schematic diagram of the capacitance touch screen of structure, in the hollow-out parts 110 of driver unit and between receiving between signal enhanced portion 220
Multiple separate chinampa structure 400 it is provided with in gap.Chinampa structure 400 is a kind of conductive material, such as ITO.
When the distance received between parts 200 and driver unit 100 is constant, chinampa structure 400 just looks like to receive parts 200
And the bridge between driver unit 100, is effectively equivalent to, by the bridge joint of chinampa structure 400, the reception parts that furthered
Distance between 200 and driver unit 100 so that receive the initial mutual capacitance between parts 200 and driver unit 100
Value increases, thus provides the mutual capacitance variable quantity after touch, and makes it become one to stablize accurate linear change, it is simple to
Detection, improves the precision judged.By the size and number of regulation chinampa structure 400, or regulate multiple chinampa knot
Spacing distance between structure 400, can regulate the scope of mutual capacitance variable quantity after touch so that it is be more conducive to detection.
Individual layer capacitance touch screen, owing to the first conductive array and the second conductive array being placed at grade, is saved
Manufacturing cost, and the light transmission of screen is preferable.Certainly, the present invention may be used without double-decker, also can effectively change
The variable quantity of kind mutual capacitance, improves signal to noise ratio and induction sensitivity.The present invention is described in detail below in conjunction with Fig. 6 and Fig. 7
The double-layer capacitive touch screen of embodiment.
It is illustrated in figure 6 the mutual capacitance type bilayer signal without the capacitance touch screen of chinampa structure of one embodiment of the invention
Figure, the first conductive array of this capacitance touch screen is arranged on the lower section of the second conductive array and is separated by predetermined distance, the
One conductive array includes that driver unit Tx1, Tx2 and Tx3, the second conductive array include receiving parts Rx1 and Rx2.
It is understood that be only for schematic example, it is also possible to be that the second conductive array is arranged on the first conductive array
Lower section and be spaced predetermined distance.
Similarly, a kind of independent conductive medium can also be embedded in double-deck capacitance touch screen to increase electricity mutually
The variable quantity held.It is illustrated in figure 7 the mutual capacitance type bilayer of one embodiment of the invention and has the capacitive touch of chinampa structure
Touch the schematic diagram of screen, in the hollow-out parts 110 of driver unit, be provided with multiple separate chinampa structure 400.Such as figure
8 to show the mutual capacitance type of another embodiment of the present invention double-deck and have the schematic diagram of capacitance touch screen of chinampa structure, ring
Solderless wrapped connection collection of letters enhanced portion 220 is provided with multiple separate chinampa structure 400.
It is understood that the structure of capacitance touch screen is not limited to above-described embodiment, driver unit 100 and reception parts
The quantity of 200 can be configured by the needs according to the size of touch-screen and for detection.
Below with reference to Fig. 9, contactor control device according to embodiments of the present invention is described.
As it is shown in figure 9, contactor control device according to embodiments of the present invention includes the capacitive touch that the above embodiment of the present invention provides
Touch screen the 1, the oneth I/O interface group the 2, the 2nd I/O interface group 3 and controller 4, wherein in an I/O interface group 2
Each I/O interface and a driver unit 100 are connected, each the I/O interface and one in the 2nd I/O interface group 3
Individual reception parts 200 are connected, and controller 4 is connected with a described I/O interface group 2 and the 2nd I/O interface group 3 respectively,
The position that described touch-screen is touched is detected according to the variable quantity of mutual capacitance between driver unit 100 and reception parts 200.
Multiple driver units 100 provide pumping signal, multiple reception parts 200 points to multiple reception parts 200 in turn
Time detection, complete scanning process.Thus, it is possible to meet single-point or multiple spot detection simultaneously.
When touching object (such as finger) is near capacitance touch screen 1, driver unit 100 can absorb on Toe Transplantation for Segmental Finger
Negative electrical charge, the electric charge therefore absorbing reception parts 200 can reduce accordingly, so that receive parts 200 and excitation
Mutual capacitance value between part 100 reduces.Controller 4 is gathered by an I/O interface group 2 and the 2nd I/O interface group 3
Driver unit 100 and receive the electric charge of parts 200, and calculate driver unit 100 and receive between parts 200 mutual
The variable quantity of electric capacity, then can calculate touch point and the touch action of touching object according to the variable quantity of mutual capacitance.By
The area broadening of pumping signal is received so that controller 4 detects the detection of the variable quantity of mutual capacitance in reception parts 200
Region also broadening, capacitance is more fine to the reaction of the touch action of touching object, improves the line of contactor control device
Property degree.Additionally, due to add the chinampa structure 400 of conductive material between driver unit 100 and reception parts 200,
Actually reduce driver unit 100 and the distance received between parts 200, make initial mutual capacitance value become big, thus
Increase capacitance variation amount after touching so that controller 4 detects the detection region also broadening of the variable quantity of mutual capacitance, electricity
Hold capacity more fine to the reaction of the touch action of touching object, further increase the linearity of contactor control device.
Contactor control device according to embodiments of the present invention, by using the capacitance touch screen of said structure, adds detection and connects
Receive the region of the variable quantity of the mutual capacitance of parts and driver unit, make the coordinate of touch point calculate the most accurate, improve
The positioning precision of contactor control device.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, permissible
Understand these embodiments can be carried out without departing from the principles and spirit of the present invention multiple change, amendment,
Replacing and modification, the scope of the present invention is limited by claims and equivalent thereof.
Claims (7)
1. a capacitance touch screen, it is characterised in that including:
Transparency carrier；
First conductive array, described first conductive array is arranged on described transparency carrier, and described first conductive array includes
Multiple driver units, the plurality of driver unit is used for providing pumping signal；
Second conductive array, described second conductive array is arranged to become predetermined angular with described first conductive array, and described
Second conductive array includes multiple reception parts, and the plurality of reception parts are for receiving what the plurality of driver unit provided
Pumping signal, wherein, described reception parts include:
Body；
The reception signal enhanced portion being connected with described body, described reception signal enhanced portion is from described body and described excitation
The equitant position of part stretches out, and described reception signal enhanced portion has multiple and described body and becomes predetermined angular
Rectilinear branches, to increase the receiving area of described reception parts reception pumping signal；
Being also formed with hollow-out parts on described driver unit, the shape design of described hollow-out parts becomes to be suitable to accommodate to form described reception
At least some of and described reception signal enhanced portion of the body of signal enhanced portion, described first conductive array and described the
Two conductive array are separated by predetermined distance, strengthen in the hollow-out parts of described driver unit or around described reception signal
Portion is additionally provided with multiple separate chinampa structure.
Capacitance touch screen the most according to claim 1, it is characterised in that described chinampa structure includes conductive material.
Capacitance touch screen the most according to claim 1, it is characterised in that the plurality of and described body becomes to make a reservation for
The rectilinear branches of angle is symmetrical relative to described body.
Capacitance touch screen the most according to claim 1, it is characterised in that the plurality of driver unit is parallel to each other
Arrange, and the plurality of reception parts are set parallel to each other.
Capacitance touch screen the most according to claim 1, it is characterised in that described first conductive array and described the
Two conductive array are vertically arranged.
Capacitance touch screen the most according to claim 1, it is characterised in that described reception signal enhanced portion is with described
The body receiving parts is integrally formed.
7. a contactor control device, it is characterised in that including:
According to the capacitance touch screen according to any one of claim 1-6；
Oneth I/O interface group, each I/O interface and a driver unit in a described I/O interface group are connected；
2nd I/O interface group, each I/O interface and reception parts in described 2nd I/O interface group are connected；
With
Controller, described controller is connected with a described I/O interface group and the 2nd I/O interface group respectively, according to described
Receive the variable quantity of mutual capacitance between parts and described driver unit and detect the position that described touch-screen is touched.
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 |
|---|---|---|---|
| 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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| Publication Number | Publication Date |
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| CN102819363A CN102819363A (en) | 2012-12-12 |
| CN102819363B true CN102819363B (en) | 2016-09-07 |
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| CN201110152727.8A Active 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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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10802649B2 (en) | 2016-07-19 | 2020-10-13 | Elo Touch Solutions, Inc. | Projected-capacitive (PCAP) touchscreen |
| US10969902B2 (en) | 2016-07-19 | 2021-04-06 | 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 |
| CN101833404A (en) * | 2009-12-24 | 2010-09-15 | 友达光电股份有限公司 | Touch display device and touch device |
| 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 |
| CN101995993A (en) * | 2009-08-03 | 2011-03-30 | 爱特梅尔公司 | Electrode layout for touch screens |
| CN202142034U (en) * | 2011-06-08 | 2012-02-08 | 比亚迪股份有限公司 | Capacitive touch screen and touch device with same |
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2011
- 2011-06-08 CN CN201110152727.8A patent/CN102819363B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN101995993A (en) * | 2009-08-03 | 2011-03-30 | 爱特梅尔公司 | Electrode layout for touch screens |
| CN101833404A (en) * | 2009-12-24 | 2010-09-15 | 友达光电股份有限公司 | Touch display device and touch device |
| CN202142034U (en) * | 2011-06-08 | 2012-02-08 | 比亚迪股份有限公司 | Capacitive touch screen and touch device with same |
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| CN102819363A (en) | 2012-12-12 |
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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. |
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