CN103092451A - Touch screen scanning method - Google Patents
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- CN103092451A CN103092451A CN2013100325808A CN201310032580A CN103092451A CN 103092451 A CN103092451 A CN 103092451A CN 2013100325808 A CN2013100325808 A CN 2013100325808A CN 201310032580 A CN201310032580 A CN 201310032580A CN 103092451 A CN103092451 A CN 103092451A
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Abstract
The invention relates to a touch screen scanning method. A touch screen comprises a capacitance matrix which is composed of a plurality of electrodes, each electrode comprises a plurality of X-direction electrodes and a plurality of Y-direction electrodes, moreover each X-direction electrode is composed of a plurality of electrode blocks and each Y-direction electrode is composed of one electrode block. When the touch screen scans, excitation is carried out respectively on different columns, scanning is carried out by turns on rows of the capacitance matrix, in the scanning process of the rows of the capacitance matrix of the touch screen, two rows are scanned simultaneously each time to obtain the capacitance difference of the two rows, and scanning is carried out in sequence. According to the touch screen scanning method, not only is the method simple, but also linearity is relatively good even if on the condition that the distance between two fingers is relatively small in a multi-finger touch process on a large-size screen by a user, moreover, and compared with an existing single-layer multi-finger algorithm, scanning speed of the scanning method is accelerated, and anti-disturbance performance is improved by a large margin.
Description
Technical field
the present invention relates to a kind of scan method of touch-screen, refer in particular to the scan method of capacitive touch screen.
Background technology
along with scientific and technical development, touch-screen has replaced the mechanical type push button panel gradually becomes the new operation interfaces of electronic equipment such as mobile phone, notebook.At present, touch-screen mainly comprises resistive touch screen, infrared touch panel and capacitive touch screen, and they all obtain coordinate by different modes.Thereby and capacitive touch screen be by touch object as the conductive material such as finger, pointer near or the touching touch-screen capacitance of touch-screen is changed, when touch-screen detects capacitance variations, just can judge the position of the touching touch-screens such as finger, pointer, and carry out the corresponding touching operation of touch position.
because capacitive touch screen has the characteristic that refers to touch-control more, the operation of hommization can be provided, thereby recently be subject to the favor in market.Present stage, the general scheme adopted of the scan mode of touch-screen is: respectively the row and column of capacitance matrix scanned, advancing during line scanning to the touch-screen capacitance matrix, scan two row or two row at every turn simultaneously, obtain the electric capacity difference of two rows or two columns, wherein a line is as the reference end, and adjacent a line is as scanning end, the like, and draw a pin on the chip that is connected of described touch-screen as the excitation end.Although increased substantially scan efficiency according to the aforesaid way touch screen scanning, reduced error, but when the user on the large scale screen with while referring to the touching touch-screen more, two finger spacings than hour, the linearity can be affected to a great extent, also emerged in the market individual layer ITO, but many finger countings method of existing individual layer, sweep velocity is slower, and linearity poor effect, when two finger spacings are larger, antijamming capability declines to a great extent.
therefore need to solve above problem for users provide a kind of easier method.
Summary of the invention
technical matters to be solved by this invention is how to provide a kind of can on the large scale screen, refer to touching more, and in the situation that the less touch screen scanning method that also can guarantee the linearity of two finger spacing.
to achieve these goals, the invention provides a kind of scan method of touch-screen, described touch-screen comprises the capacitance matrix be comprised of several electrodes, described electrode comprises some directions X electrodes and some Y-direction electrodes, and described directions X electrode is comprised of some electrode blocks, the Y-direction electrode is comprised of an electrode block, during described touch-screen scanning, respectively the row and column of capacitance matrix scanned, advancing during line scanning to the touch-screen capacitance matrix, scan two row at every turn simultaneously, obtain the electric capacity difference of this two row, sequential scanning successively, if the electrode block on a line is all as the reference end arbitrarily, the electrode block of its adjacent lines is all as scanning end, and corresponding two row are arranged as the excitation end, and the equal unsettled or ground connection of the electrode block of other row, obtain this group electric capacity difference.
compared with prior art, the scan method of touch-screen of the present invention, not only method is simple, and the user is while referring to touching more on the large scale screen, even in the situation that two finger spacing is less, the linearity is also better; Moreover, with the algorithm that existing individual layer refers to more, compare, adopt its sweep velocity of scan method of the present invention to speed, interference free performance increases substantially.
The accompanying drawing explanation
fig. 1 is according to touch screen electrode schematic layout pattern of the present invention.
Specific embodiment
below in conjunction with drawings and Examples, the present invention is further illustrated.
touch-screen of the present invention is provided with capacitance matrix and the chip be comprised of several electrodes, adopt the scan mode compared in twos during described touch-screen scanning, by encouraging respectively to different lines, the row of capacitance matrix is taken turns to scan, advancing during line scanning to the touch-screen capacitance matrix, scan two row at every turn simultaneously, obtain the electric capacity difference of this two row, sequential scanning successively.
below describe the scan method of touch-screen in detail:
please refer to shown in Fig. 1, touch-screen of the present invention is the single-layer electrodes layout, described electrode comprises some directions X electrodes and some Y-direction electrodes, electrode on directions X is followed successively by X1, X2..., electrode on Y-direction is followed successively by Y1, Y2..., described directions X electrode is comprised of some electrode blocks 11, the Y-direction electrode is comprised of an electrode block 12, after interconnecting, described directions X electrode block 11 correspondences are connected on chip (not indicating), be to be connected on chip after the electrode block 11 of every a line is connected respectively, the electrode block 12 of described Y-direction is directly connected on chip.Described directions X electrode block 11 and Y-direction electrode block 12 are all laid on substrate, for fear of mutual conduction between described directions X electrode block 11 and Y-direction electrode block 12, the marginal position place of described touch-screen arranges bridge contact, by FPC, several electrode blocks 11 on directions X is interconnected.
described electrode block 11 by main body 110 and main body 110 extended several support bodies 111 form, wherein said support body 111 is mutually vertical with main body 110, described electrode block 12 by main body 120 and main body 120 extended several support bodies 121 form, and described support body 121 and main body 120 are also mutually vertical.Intermeshing between described directions X electrode block 11 and Y-direction electrode block 12, the support body 111 that is described electrode block 11 is intermeshing with the support body 121 of electrode block 12, and then increased on the directions X and the contact area of Y-direction top electrode piece, significantly strengthened the coupling capacitance produced between electrode block, so the linearity is respond well.
if count from the first row, electrode block 11 orders on every a line directions X are X1, X2, X3, and the electrode block on the first row directions X is X1, and the electrode block on the second row directions X is that the electrode block on X2, the third line directions X is X3, and order is analogized successively; If count from first row, the electrode block on each row Y-direction is sequentially Y1, Y2, Y3, and the electrode block on the first row Y-direction is Y1, and the electrode block on the secondary series Y-direction is Y2, and the electrode block on the 3rd row Y-direction is Y3, and order is analogized successively.
during described touch-screen scanning, if the electrode block on a line directions X is all as reference end R, electrode block on another row directions X is all as scanning end S, using adjacent two electrode blocks that are listed as excitation end L, from the first row sequential scanning, until last column finishes, and the electrode block of adjacent first row and secondary series is all held L as encouraging; Continue scanning, from the first row sequential scanning, until last column finishes, and adjacent secondary series and tertial electrode block are all held L as encouraging; The like, sequential scanning is until last two row, all as excitation end L, complete the scanning of touch-screen according to the method described above.
mode when please refer to touch-screen shown in Fig. 1 and scanning for the first time, electrode block X1 on the first row directions X is all as reference end R, electrode block X2 on the second row directions X is all as scanning end S, and the electrode block Y1 on the first row Y-direction and the electrode block Y2 on the secondary series Y-direction are all as excitation end L, and the equal unsettled or ground connection of the electrode block on other row Y-direction is obtained this first group of electric capacity difference, then the electrode block X2 on the second row directions X is all as reference end R, electrode block X3 on the third line directions X is all as scanning end S, now the electrode block Y1 on the first row Y-direction and the electrode block Y2 on the secondary series Y-direction are still all as excitation end L, and the equal unsettled or ground connection of the electrode block on other row Y-direction, obtain this second group of electric capacity difference, the like until all line scannings complete, continue scanning, electrode block X1 on the first row directions X is all as reference end R, electrode block X2 on the second row directions X is all as scanning end S, and the electrode block Y3 on the electrode block Y2 on the secondary series Y-direction and the 3rd row Y-direction is all as excitation end L, and the equal unsettled or ground connection of the electrode block on other row Y-direction, obtain this group electric capacity difference, then the electrode block X2 on the second row directions X is all as reference end R, electrode block X3 on the third line directions X is all as scanning end S, and the electrode block Y3 on the electrode block Y2 on the secondary series Y-direction and the 3rd row Y-direction is all as excitation end L, and the equal unsettled or ground connection of the electrode block on other row Y-direction, obtain this group electric capacity difference, the like, last group electric capacity difference is obtained in sequential scanning according to the method described above, complete the scanning of touch-screen.
in above-mentioned scan method, in any single pass process, if the electrode block of a line is all as reference end R arbitrarily, be that electrode block on directions X is all as with reference to end R, the electrode block of its adjacent lines is all as scanning end S, and corresponding two row are arranged as excitation end L, and the equal unsettled or ground connection of the electrode block that other lists, obtain the electric capacity difference of this group.
owing to adopting the scan mode compared in twos, touch-screen is not in the situation that have the external interference circuit can keep mobile equilibrium, be pulse ends numerical value identical with the ratio of the ratio of scanning end numerical value and pulse ends numerical value and reference edge numerical value, once and external interference be arranged as finger touches, this balance is broken, pulse ends numerical value is just no longer identical with the ratio of pulse ends numerical value and reference edge numerical value with the ratio of scanning end numerical value, if both ratio difference are less, just can detect its numerical value, arrive the purpose of regulating circuit by compensating its difference, if both ratio difference are larger, the image data scope that has exceeded the touch-control chip, so just have no idea to arrive the purpose of accurate induction touch-control.And the present invention adopts two row as the excitation end, thereby make to encourage the terminal number value to increase, even cause, circuit is unbalanced to differ greatly, increase due to excitation terminal number value, its numerical value that is used for compensating is in the image data scope of touch-control chip, therefore the final test personnel more easily test its electric capacity that should compensate, the imbalance of compensating circuit fast.
in scan method of the present invention, a plurality of electrode blocks 11 on described directions X are corresponding on FPC to be connected and to draw on a pin receiving chip, therefore the number of pins that causes being connected on chip reduces relatively, not only interference free performance increases considerably, and can be applied on the large scale screen; Moreover, due to the directions X electrode block and the Y-direction electrode block intermeshing, and mesh degree is large, so also strengthened the coupling of electric capacity, even so the user in the situation that the less touch-screen that operates of two finger spacing also can guarantee the good linearity.
Claims (10)
1. the scan method of a touch-screen, described touch-screen comprises the capacitance matrix be comprised of several electrodes, described electrode comprises some directions X electrodes and some Y-direction electrodes, and described directions X electrode is comprised of some electrode blocks, the Y-direction electrode is comprised of an electrode block, during described touch-screen scanning, respectively the row and column of capacitance matrix scanned, advancing during line scanning to the touch-screen capacitance matrix, scan two row at every turn simultaneously, obtain the electric capacity difference of this two row, sequential scanning successively, it is characterized in that: if the electrode block on any a line is all as the reference end, the electrode block of its adjacent lines is all as scanning end, and corresponding two row are arranged as the excitation end, and the equal unsettled or ground connection of the electrode block of other row, obtain this group electric capacity difference.
2. the scan method of touch-screen as claimed in claim 1 is characterized in that: the electrode block on described directions X electrode and Y-direction electrode by main body and main body extended several support bodies form.
3. the scan method of touch-screen as claimed in claim 2, it is characterized in that: described support body is mutually vertical with main body.
4. the scan method of touch-screen as claimed in claim 1 or 2, is characterized in that: intermeshing between described directions X electrode block and Y-direction electrode block.
5. the scan method of touch-screen as claimed in claim 1 or 2, is characterized in that: after the electrode block correspondence of the every a line of described directions X interconnects, be connected on chip.
6. the scan method of touch-screen as claimed in claim 5, it is characterized in that: the marginal position place of described touch-screen is provided with bridge contact, and on described directions X, several electrode blocks of every a line interconnect by the FPC correspondence.
7. the scan method of touch-screen as claimed in claim 1, it is characterized in that: the electrode block of described Y-direction is directly connected on chip.
8. the scan method of touch-screen as claimed in claim 1, is characterized in that: during described touch-screen scanning, by encouraging respectively to different lines, the row of capacitance matrix is taken turns to scan.
9. as the scan method of touch-screen as described in claim 1 or 8, it is characterized in that: the described touch-screen method of sequential scanning successively is as follows: if the electrode block on a line directions X is all as with reference to end, electrode block on another row directions X is all as scanning end, using adjacent two electrode blocks that are listed as the excitation end, from the first row sequential scanning, until all row finish, and the electrode block of adjacent first row and secondary series is all held as encouraging; Continue scanning, from the first row sequential scanning, until all row finish, and adjacent secondary series and tertial electrode block are all held as encouraging; The like, sequential scanning is until last two row, all as the excitation end, complete the scanning of touch-screen according to the method described above.
10. as the scan method of touch-screen as described in claim 1 or 8, it is characterized in that: the described touch-screen method of sequential scanning successively is as follows: while scanning for the first time, electrode block on the first row directions X is all as the reference end, electrode block on the second row directions X is all as scanning end, and the electrode block on the electrode block on the first row Y-direction and secondary series Y-direction is all as the excitation end, and the equal unsettled or ground connection of the electrode block on other row Y-direction is obtained this first group of electric capacity difference, then the electrode block on the second row directions X is all as the reference end, electrode block on the third line directions X is all as scanning end, now the electrode block on the first row Y-direction and the electrode block on the secondary series Y-direction are still all as the excitation end, and the equal unsettled or ground connection of the electrode block on other row Y-direction, obtain this second group of electric capacity difference, the like until all line scannings complete, continue scanning, electrode block on the first row directions X is all as the reference end, electrode block on the second row directions X is all as scanning end, and the electrode block on the electrode block on the secondary series Y-direction and the 3rd row Y-direction is all as excitation end L, and the equal unsettled or ground connection of the electrode block on other row Y-direction, obtain this group electric capacity difference, then the electrode block on the second row directions X is all as the reference end, electrode block on the third line directions X is all as scanning end, and the electrode block on the electrode block on the secondary series Y-direction and the 3rd row Y-direction is all as excitation end L, and the equal unsettled or ground connection of the electrode block on other row Y-direction, obtain this group electric capacity difference, the like, last group electric capacity difference is obtained in sequential scanning according to the method described above, complete the scanning 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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| CN108052234A (en) * | 2013-07-24 | 2018-05-18 | 泉州臻美智能科技有限公司 | Touch-screen |
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| CN103092451B (en) | 2019-02-15 |
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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. |