CN103092451B - The scan method of touch screen - Google Patents
The scan method of touch screen Download PDFInfo
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- CN103092451B CN103092451B CN201310032580.8A CN201310032580A CN103092451B CN 103092451 B CN103092451 B CN 103092451B CN 201310032580 A CN201310032580 A CN 201310032580A CN 103092451 B CN103092451 B CN 103092451B
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Abstract
The present invention relates to a kind of scan methods of touch screen, the touch screen includes the capacitance matrix being made of several electrodes, the electrode includes several X-direction electrodes and several Y-direction electrodes, and the X-direction electrode is made of several electrode blocks, Y-direction electrode is made of an electrode block, when the touch screen scans, by being motivated respectively to different lines, the row of capacitance matrix is scanned by turns, when the row to touch screen capacitance matrix is scanned, it scans two rows simultaneously every time, obtains the capacitive differential of two row, successively sequential scan.The method of the invention, not only method is simple, and user on large scale screen refer to touching when, even if the linearity is also preferable in the small-pitch situation of two fingers；Furthermore compared with the algorithm that existing single layer refers to more, using scan method of the present invention, its scanning speed is speeded, and interference free performance increases substantially.
Description
Technical field
The present invention relates to a kind of scan methods of touch screen, refer in particular to the scan method of capacitive touch screen.
Background technique
With the development of science and technology, touch screen has gradually replaced mechanical botton panel as mobile phone, notebook etc.
The new operation interface of electronic equipment.Currently, touch screen mainly includes resistive touch screen, infrared touch panel and capacitive touch
Screen is touched, they obtain coordinate by different modes.And capacitive touch screen is by touch object such as finger, stylus etc.
Conductive material is close or touching touch screen is to make the capacitance of touch screen change, when touch screen detects capacitance variations
When, it can judge the position of the touching touch screen such as finger, stylus, and execute the behaviour of touching corresponding to touch position
Make.
Since capacitive touch screen has the characteristic for more referring to touch-control, it is possible to provide humanized operation, thus recently by city
The favor of field.At this stage, the scheme that the scanning mode of touch screen generally uses is: sweeping respectively to the row and column of capacitance matrix
It retouches, when the row to touch screen capacitance matrix is scanned, scans two rows or two column simultaneously every time, obtain two rows or two columns
Capacitive differential, wherein a line is as reference end, adjacent a line as scanning end, and so on, and the touch screen is connected
A pin is drawn on the chip connect as excitation end.Scanning effect is although greatly improved according to aforesaid way touch screen scanning
Rate reduces error, but when user uses on large scale screen and refers to touching touch screen more, when two fingers spacing is smaller, line
Property degree largely will receive influence, also emerge single layer ITO currently on the market, but more finger countings of existing single layer
Method, scanning speed is slower, and the linearity is ineffective, and when two fingers spacing is larger, anti-interference ability declines to a great extent.
Therefore need to provide a kind of easier method for users to solve problem above.
Summary of the invention
The technical problem to be solved by the present invention is to how to provide one kind can on large scale screen refer to touching, and
Also it can guarantee the touch screen scanning method of the linearity in the small-pitch situation of two fingers.
To achieve the goals above, the present invention provides a kind of scan method of touch screen, and the touch screen includes by several
The capacitance matrix of a electrode composition, the electrode include several X-direction electrodes and several Y-direction electrodes, and the X-direction electrode
It is made of several electrode blocks, Y-direction electrode is made of an electrode block, when the touch screen scans, respectively to capacitance matrix
Row and column is scanned, and when the row to touch screen capacitance matrix is scanned, is scanned two rows simultaneously every time, is obtained two row
Capacitive differential, successively sequential scan, if the electrode block in any a line is used as reference end, the conduct of the electrode block of adjacent rows
Scanning end, and have corresponding two column as excitation end, and the electrode block of other column is hanging or is grounded, and obtains this group of capacitance difference
Value.
Compared with prior art, the scan method of touch screen of the present invention, not only method is simple, and user is in big ruler
When referring to touching on very little screen, even if the linearity is also preferable in the small-pitch situation of two fingers more；Furthermore it is more with existing single layer
The algorithm of finger is compared, and using scan method of the present invention, its scanning speed is speeded, and interference free performance increases substantially.
Detailed description of the invention
Fig. 1 is the touch screen electrode schematic layout pattern according to the present invention.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
Touch screen of the present invention is equipped with the capacitance matrix and chip being made of several electrodes, and the touch screen is swept
Using the scanning mode compared two-by-two when retouching, i.e., by being motivated respectively to different lines, the row of capacitance matrix is scanned by turns,
When the row to touch screen capacitance matrix is scanned, scans two rows simultaneously every time, obtain the capacitive differential of two row, it is successively suitable
Sequence scanning.
The following detailed description of the scan method of touch screen:
It please refers to shown in Fig. 1, touch screen of the present invention is monolayer electrode layout, and the electrode includes several X-directions
Electrode and several Y-direction electrodes, the electrode in X-direction are followed successively by X1, X2..., and the electrode in Y-direction is followed successively by Y1, Y2...,
The X-direction electrode is made of several electrode blocks 11, and Y-direction electrode is made of an electrode block 12, the X-direction electrode block 11
It is connected on chip (not indicating) after corresponding interconnection, i.e., the electrode block 11 of every a line is connected to core after being connected respectively
The electrode block 12 of on piece, the Y-direction is directly connected on chip.The X-direction electrode block 11 and Y-direction electrode block 12 are uniformly distributed
If on substrate, in order to avoid mutual conduction, the side of the touch screen between the X-direction electrode block 11 and Y-direction electrode block 12
Bridge contact is set at edge position, is connected with each other several electrode blocks 11 in X-direction by FPC.
The electrode block 11 is made of main body 110 and several support bodies 111 extended from main body 110, wherein described
Support body 111 is mutually perpendicular to main body 110, and the electrode block 12 is by main body 120 and several support bodies extended from main body 120
121 compositions, and the support body 121 is also mutually perpendicular to main body 120.Between the X-direction electrode block 11 and Y-direction electrode block 12
Intermeshing, i.e., the support body 111 of the described electrode block 11 and the support body 121 of electrode block 12 are intermeshed, and then are increased in X-direction
And the contact area of Y-direction top electrode block, the coupled capacitor generated between electrode block is greatly enhanced, therefore the linearity is imitated
Fruit is good.
If counting from the first row, 11 sequence of electrode block in every a line X-direction is X1, X2, X3, i.e., in the first row X-direction
Electrode block be X1, the electrode block in the second row X-direction is X2, the electrode block in the third line X-direction is X3, successively sequence class
It pushes away；If counting from first row, the electrode block sequence in each column Y-direction is Y1, Y2, Y3, i.e. electrode block in first row Y-direction
For Y1, the electrode block in secondary series Y-direction is Y2, and the electrode block in third column Y-direction is Y3, is successively sequentially analogized.
When the touch screen scans, if the electrode block in a line X-direction is used as reference end R, the electricity in another row X-direction
Pole block is used as scanning end S, then using the electrode block of adjacent two column as excitation end L, from the first row sequential scan up to last
Until row terminates, and the electrode block of adjacent first column and secondary series is as excitation end L；It continues to scan on, is swept from the first row sequence
It retouches until last line terminates, and adjacent second column and tertial electrode block are as excitation end L；And so on, it presses
According to above method sequential scan until most next two columns complete the scanning of touch screen as excitation end L.
Mode when touch screen shown in Fig. 1 scans for the first time is please referred to, the electrode block X1 in the first row X-direction is as ginseng
End R is examined, the electrode block X2 in the second row X-direction is used as scanning end S, and electrode block Y1 and secondary series Y in first row Y-direction
Electrode block Y2 on direction is as excitation end L, and the electrode block in other column Y-directions is hanging or ground connection, obtain this
One group of capacitive differential；Then the electrode block X2 in the second row X-direction is used as reference end R, the electrode block X3 in the third line X-direction
It is used as scanning end S, at this time the electrode block Y2 still conduct on the electrode block Y1 and secondary series Y-direction in first row Y-direction
Motivate end L, and the electrode block in other column Y-directions is hanging or ground connection, obtains second group of capacitive differential, and so on it is straight
It scans and completes to all rows；It continues to scan on, the electrode block X1 in the first row X-direction is used as reference end R, in the second row X-direction
Electrode block X2 be used as scanning end S, and the electrode block Y3 on the electrode block Y2 and third column Y-direction in secondary series Y-direction is equal
As excitation end L, and the electrode block in other column Y-directions is hanging or is grounded, and obtains this group of capacitive differential, then the second row
Electrode block X2 in X-direction is used as reference end R, and the electrode block X3 in the third line X-direction is used as scanning end S, and secondary series Y
The electrode block Y3 on electrode block Y2 and third column Y-direction on direction, which is used as, motivates end L, and the electrode in other column Y-directions
Block is hanging or is grounded, and obtains this group of capacitive differential, and so on, sequential scan obtains last group electricity according to the method described above
Tolerance completes the scanning of touch screen.
In above-mentioned scan method, during any single pass, if the electrode block of any a line is used as reference end R,
Electrode block i.e. in X-direction is used as reference end R, and the electrode block of adjacent rows is used as scanning end S, and has corresponding two column to make
To motivate end L, and the electrode block on other column is hanging or is grounded, and obtains the capacitive differential of the group.
Since using the scanning mode compared two-by-two, touch screen circuit in the case where no external interference can keep dynamic
Balance, i.e., the ratio of pulse ends numerical value and scanning end numerical value and pulse ends numerical value are identical as the ratio of reference end numerical value, and once
There is external interference such as finger to touch, this balance is broken, the ratio of pulse ends numerical value and scanning end numerical value with regard to and pulse ends number
Value is no longer identical as the ratio of reference end numerical value, if the two ratio difference is smaller, so that it may its numerical value is detected, it is poor by compensating it
The purpose that different arrival adjusts circuit has exceeded the acquisition data area of touch chip, then just not having if the two ratio difference is larger
There is method to reach the purpose of accurate induction touch-control.And the present invention is used as excitation end using two column, thus make that end numerical value is motivated to increase,
Even if causing circuit is unbalanced to differ greatly, due to motivating the increase of end numerical value, the numerical value for being used to compensate is in touch chip
Acquisition data area in, final test personnel are easier to test its capacitor that should be compensated, therefore can quick compensation circuit
It is uneven.
In scan method of the present invention, the multiple electrodes block 11 in the X-direction, which corresponds to be connected and draw on FPC, to be connect
Onto a pin of chip, therefore cause the number of pins being connected on chip is opposite to reduce, not only interference free performance is substantially
Degree increases, and can be applied on large scale screen；Furthermore since X-direction electrode block and Y-direction electrode block are intermeshed,
And mesh degree is big, so also enhance the coupling of capacitor, even if therefore user operated in the small-pitch situation of two fingers
Touch screen also can guarantee the good linearity.
Claims (9)
1. a kind of scan method of touch screen, the touch screen includes the capacitance matrix being made of several electrodes, the electrode
Including several X-direction electrodes and several Y-direction electrodes, and the X-direction electrode is made of several electrode blocks, Y-direction electrode by
One electrode block composition is respectively scanned the row and column of capacitance matrix, when the touch screen scans to touch screen capacitor
When the row of matrix is scanned, scans two rows simultaneously every time, obtain the capacitive differential of two row, successively sequential scan, feature
It is: is connected on chip after the corresponding interconnection of the electrode block of described every a line of X-direction, if the electrode block in any a line is equal
As reference end, the electrode block of adjacent rows is used as scanning end, and has corresponding two column to be used as and motivate end, and the electricity of other column
Pole block is hanging or is grounded, and obtains corresponding capacitive differential.
2. the scan method of touch screen as described in claim 1, it is characterised in that: on the X-direction electrode and Y-direction electrode
Electrode block is made of main body and several support bodies extended from main body.
3. the scan method of touch screen as claimed in claim 2, it is characterised in that: the support body is mutually perpendicular to main body.
4. the scan method of touch screen as claimed in claim 1 or 2, it is characterised in that: the X-direction electrode block and Y-direction electricity
It is intermeshed between the block of pole.
5. the scan method of touch screen as described in claim 1, it is characterised in that: be equipped with bridge at the marginal position of the touch screen
Contact, several electrode blocks of every a line pass through that FPC is corresponding to be connected with each other in the X-direction.
6. the scan method of touch screen as described in claim 1, it is characterised in that: the electrode block of the Y-direction is directly connected to
On chip.
7. the scan method of touch screen as described in claim 1, it is characterised in that: when the touch screen scans, by difference
Column motivate respectively, are scanned by turns to the row of capacitance matrix.
8. the scan method of touch screen as described in claim 1 or 7, it is characterised in that: the touch screen successively sequential scan
Method is as follows: if the electrode block in a line X-direction is used as reference end, the electrode block in another row X-direction is used as scanning end,
Then using the electrode block of adjacent two column as excitation end, from the first row sequential scan until all rows terminate, and adjacent first
The electrode block of column and secondary series is as excitation end；It continues to scan on, from the first row sequential scan until all rows terminate, and
Adjacent second column and tertial electrode block are as excitation end；And so on, sequential scan is until last according to the method described above
Two column as excitation end, complete the scanning of touch screen.
9. the scan method of touch screen as described in claim 1 or 7, it is characterised in that: the touch screen successively sequential scan
Method is as follows: when scanning for the first time, the electrode block in the first row X-direction is used as reference end, the electrode block in the second row X-direction
It is used as scanning end, and the electrode block on the electrode block and secondary series Y-direction in first row Y-direction is used as and motivates end, and its
Electrode block in its column Y-direction is hanging or is grounded, and obtains first group of capacitive differential；Then the electrode in the second row X-direction
Block is used as reference end, and the electrode block in the third line X-direction is used as scanning end, at this time the electrode block in first row Y-direction and
Electrode block in secondary series Y-direction is still as excitation end, and the electrode block in other column Y-directions is hanging or is grounded,
Obtain second group of capacitive differential, and so on until all rows scan complete；It continues to scan on, the electrode block in the first row X-direction
It is used as reference end, the electrode block in the second row X-direction is used as scanning end, and electrode block and third in secondary series Y-direction
Electrode block in column Y-direction is as excitation end L, and the electrode block in other column Y-directions is hanging or ground connection, acquisition are corresponding
Capacitive differential, then the electrode block in the second row X-direction is used as reference end, the electrode block conduct in the third line X-direction
Scanning end, and the electrode block on the electrode block and third column Y-direction in secondary series Y-direction is used as and motivates end L, and other column Y
Electrode block on direction is hanging or ground connection, obtains corresponding capacitive differential, and so on, sequential scan according to the method described above
Last group of capacitive differential is obtained, the scanning of touch screen is completed.
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| CN201310032580.8A CN103092451B (en) | 2013-01-29 | 2013-01-29 | The scan method of touch screen |
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| CN201310032580.8A CN103092451B (en) | 2013-01-29 | 2013-01-29 | The scan method of touch screen |
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| CN103092451B true CN103092451B (en) | 2019-02-15 |
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| CN108052234B (en) * | 2013-07-24 | 2020-10-20 | 上海企天信息技术有限公司 | Touch identification method of touch screen |
| CN106527811B (en) * | 2016-11-21 | 2019-04-09 | 厦门天马微电子有限公司 | Driving method, touch-control display panel and the touch control display apparatus of touch-control display panel |
| CN106527821B (en) * | 2016-12-29 | 2019-06-14 | 厦门天马微电子有限公司 | Touch-control driving method, touch-control display panel and the display device of touch-control display panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2012129828A1 (en) * | 2011-03-28 | 2012-10-04 | 深圳市汇顶科技有限公司 | Noise reduction processing method and system for touch detection apparatus |
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| JP5164930B2 (en) * | 2009-06-05 | 2013-03-21 | 株式会社ジャパンディスプレイウェスト | Touch panel, display panel, and display device |
| CN101833404B (en) * | 2009-12-24 | 2012-01-04 | 友达光电股份有限公司 | Touch display device and touch device |
| CN102760016B (en) * | 2011-04-26 | 2015-10-21 | 联咏科技股份有限公司 | The layout structure of capacitor-type touch panel |
| CN102279679B (en) * | 2011-07-22 | 2013-07-31 | 苏州瀚瑞微电子有限公司 | Scanning configuration and positioning method of two-dimensional capacitive sensor |
| CN102402358A (en) * | 2011-11-25 | 2012-04-04 | 苏州瀚瑞微电子有限公司 | Touch screen and positioning method |
| CN202649986U (en) * | 2012-02-16 | 2013-01-02 | 洋华光电股份有限公司 | Capacitive touch apparatus |
| CN102880368B (en) * | 2012-09-28 | 2015-09-23 | 苏州瀚瑞微电子有限公司 | A kind of scan method of touch-screen |
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| WO2012129828A1 (en) * | 2011-03-28 | 2012-10-04 | 深圳市汇顶科技有限公司 | Noise reduction processing method and system for touch detection apparatus |
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Effective date of registration: 20220607 Address after: 518000 705, west block, Tian'an innovation and Technology Plaza (phase II), No. 2, Tairan 10th Road, Tian'an community, Shatou street, Futian District, Shenzhen, Guangdong Province Patentee after: Hanrui Microelectronics (Shenzhen) Co.,Ltd. Address before: 215163 floor 3, building M1, microsystem Park, No. 2, Peiyuan Road, science and Technology City, high tech Zone, Suzhou, Jiangsu Patentee before: PIXCIR MICROELECTRONICS Co.,Ltd. |
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