CN102880368B - A kind of scan method of touch-screen - Google Patents
A kind of scan method of touch-screen Download PDFInfo
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- CN102880368B CN102880368B CN201210366698.XA CN201210366698A CN102880368B CN 102880368 B CN102880368 B CN 102880368B CN 201210366698 A CN201210366698 A CN 201210366698A CN 102880368 B CN102880368 B CN 102880368B
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Abstract
The present invention relates to a kind of scan method of touch-screen, its mode combined by both-end scanning and single-ended scanning, and single-ended scanning adopts one by one successively the method for touch screen scanning, and a point situation discusses the whole touch-screen of scanning or partial sweep touch-screen, therefore not only decrease sweep time, effectively reduce operand, make the also large degree raising of its execution efficiency, report point rate is faster, and Consumer's Experience is more smooth.
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 the development of science and technology, touch-screen has replaced mechanical botton panel gradually becomes the new operation interface of the 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.And capacitive touch screen is as close in conductive material such as finger, pointer by touch object or touches touch-screen thus make the capacitance of touch-screen change, when touch-screen detects capacitance variations, just can judge the position of the touching touch-screens such as finger, pointer, and perform the touching operation corresponding to touch position.
because capacitive touch screen has the characteristic referring to touch-control more, the operation of hommization can be provided, thus recently be subject to the favor in market.Present stage, the scan mode of touch-screen is mostly judge which sensing region is by close or touching according to scanning result again after scanning whole sensing region successively, and then according to by near or touching sensing region, calculate finger or contact tool institute near or touch single-point or multi-point touch position.Because above-mentioned scan mode is lined by line scan to whole sensing region, if when sensing region number is too much, then to lengthen the sweep time of touch-screen and operand also can increase, cause its execution efficiency also can significantly reduce, have impact on a report point rate.Therefore need for users provide a kind of easier method to solve above problem.
Summary of the invention
technical matters to be solved by this invention how to provide a kind of scan method can saved time and can improve report point rate very well.
to achieve these goals, the invention provides a kind of scan method of touch-screen, described touch-screen comprises the capacitance matrix be made up of several electrodes, it comprises the following steps: the first step: the method successively touch screen scanning scanning the single-ended scan electrode one by one of whole Touch Screen with both-end, wherein said both-end scanning refers to and scans the row and column of touch-screen capacitance matrix respectively, to touch-screen capacitance matrix advance line scanning time, scan two row or two row at every turn simultaneously, obtain the capacitive differential of two rows or two columns, described single-ended scanning refers to and scans the row and column of touch-screen capacitance matrix respectively, to touch-screen capacitance matrix advance line scanning time, each scanning a line or row, obtain the capacitive differential of row or row and reference capacitance, and adopt during described single-ended touch screen scanning be compartment scanning, second step: adopt the method touch screen scanning that both-end scans within a period of time, if and to confirm on touch-screen not finger, then adopt both-end to scan whole touch-screen, if once confirm that touch-screen has finger, then adopt partial sweep touch-screen, and only scanning there is the region pointed and touch, 3rd step: continue with the method successively touch screen scanning of both-end touch screen scanning in conjunction with single-ended scan electrode one by one within a period of time, and during both-end touch screen scanning, if confirmation touch-screen is not pointed, both-end is then adopted to scan whole touch-screen, if once confirm that touch-screen has finger, then adopt partial sweep touch-screen, and only scanning there is the region pointed and touch, finally, touch screen scanning is continued with the method for above-mentioned second step and the 3rd step.
compared with prior art, the scan method of touch-screen of the present invention, not only decreases sweep time, effectively reduces operand, and make the also large degree raising of its execution efficiency, report point rate is faster, and Consumer's Experience is more smooth.
Accompanying drawing explanation
fig. 1 is the structural representation according to both-end touch screen scanning of the present invention.
fig. 2 is the structural representation according to single-ended touch screen scanning of the present invention.
fig. 3 is the process flow diagram according to touch screen scanning method 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 comprises the capacitance matrix be made up of several electrodes, and it relates to two kinds of scan modes, and one is both-end scan mode, and one is single-ended scan mode.So-called both-end scanning refers to and scans the row and column of touch-screen capacitance matrix respectively, to touch-screen capacitance matrix advance line scanning time, scan two row or two row at every turn simultaneously, obtain the capacitive differential of two rows or two columns; So-called single-ended scanning refers to and scans the row and column of touch-screen capacitance matrix respectively, to touch-screen capacitance matrix advance line scanning time, each scanning a line or row, obtain the capacitive differential of row or row and reference capacitance.The method of both-end scanning and single-ended scanning is discussed in citing below:
please refer to shown in Fig. 1, if touch-screen 1 is provided with several electrodes 10, the coordinate of its first row in X-direction (transverse direction) is respectively X11, X12, X13......, the coordinate of the second row in X-direction (transverse direction) is respectively X21, X22, X23......, the like, be connected respectively in the respective pins of chip 2.During the scanning of capacitive touch screen both-end, for line scanning, first time is when scanning, if using the first row first electrode as with reference to end R, the second row first electrode is as scanning end S, and now all unsettled the or ground connection of other electrode, obtains first group of capacitive differential Raw12; In like manner second time is when scanning, and now the second row first electrode is as with reference to end R, and tactic the third line first electrode is as scanning end S, and now all unsettled the or ground connection of other electrode, obtains second group of capacitive differential Raw23; The like, organize capacitive differential Raw (N-2) (N-1) until obtain (N-1), according to the method described above, order scans complete touch-screen.
please refer to shown in Fig. 2, during the single-ended scanning of capacitive touch screen 1, electrode on described touch-screen 1 is connected respectively in the respective pins of chip 2, and ground connection after chip 2 external reference capacitance C of pin, for line scanning, when first time is scanned, if using the first row first electrode as scanning end S, that electrode of described connection reference capacitance C is as with reference to end R, and now all unsettled the or ground connection of other electrode, obtains first group of capacitive differential Raw11c; In like manner second time is when scanning, and the second row first electrode is as scanning end S, and that electrode of described connection reference capacitance C is as with reference to end R, and now all unsettled the or ground connection of other electrode, obtains second group of capacitive differential Raw21c; The like, until obtain N group capacitive differential Rawnnc, according to the method described above, order scans complete touch-screen.
during single-ended touch screen scanning 1 of the present invention, what adopt is compartment scanning, for the capacitance matrix shown in Fig. 1, namely when first time is scanned, using the first row first electrode as scanning end S, connect that electrode of reference capacitance C as reference end R, when second time scans, using the third line first electrode as scanning end S, connect that electrode of reference capacitance C as with reference to end R...... in like manner, using secondary series second electrode as scanning end S, connect that electrode of reference capacitance C as reference end R, secondary series the 4th electrode is as scanning end S, connect that electrode of reference capacitance C as reference end R......, order touch screen scanning successively.
please refer to shown in Fig. 3, the scan method of touch-screen of the present invention, the first step: the method successively touch screen scanning scanning the single-ended scan electrode one by one of whole Touch Screen with both-end, its concrete grammar is as follows: when first time is scanned, first obtain (N-1) with both-end scan mode to organize capacitive differential Raw (N-2) (N-1), then obtain first group of capacitive differential Raw11c with single-ended compartment scan mode; When second time scans, or first obtaining (N-1) with both-end scan mode organizes capacitive differential Raw (N-2) (N-1), then with single-ended compartment scanning acquisition second group of capacitive differential Raw31c; Third time, when scanning, continues to obtain (N-1) with both-end scan mode and organizes capacitive differential Raw (N-2) (N-1), then with single-ended compartment scanning acquisition the 3rd group of capacitive differential Raw22c; Order successively, until complete last scanning, obtains last group capacitive differential; Second step: adopt the method touch screen scanning that both-end scans within a period of time, if and to confirm on touch-screen not finger, then adopt both-end to scan whole touch-screen, if once confirm that touch-screen has finger, then adopt partial sweep touch-screen, and only scanning there is the region pointed and touch; 3rd step: continue with the method successively touch screen scanning of both-end touch screen scanning in conjunction with single-ended scan electrode one by one within a period of time, and during both-end touch screen scanning, if confirmation touch-screen is not pointed, both-end is then adopted to scan whole touch-screen, if once confirm that touch-screen has finger, then adopt partial sweep touch-screen, and only scanning there is the region pointed and touch; Finally, touch screen scanning is continued with the method for above-mentioned second step and the 3rd step.
in the scan method first step of above-mentioned touch-screen, the capacitive differential obtained with single-ended compartment scan mode during each scanning all stores its numerical value and till being stored into last scanning in follow-up scanning process always, namely for the first group of capacitive differential Raw11c obtained with single-ended compartment scan mode during first time scanning, when second time scans, second group of capacitive differential Raw31c is obtained with single-ended compartment scanning, all data that now single-ended compartment scanning obtains are exactly Raw11c and Raw31c, order successively, to when scanning for the last time, all data that single-ended compartment scanning obtains are exactly Raw11c, Raw31c......, Rawnnc.
whether above-mentioned confirmation touch-screen there is the method for finger as follows: judge whether described maximum influence value is greater than the threshold value of preset in advance, if be greater than the threshold value of preset in advance, then think that touch-screen has finger; If be not more than the threshold value of preset in advance, then think and touch-screen does not have finger to touch.And above-mentioned second step and a period of time involved in the 3rd step can identical also can not be identical, user can arrange the suitable time as required.
due to the method touch screen scanning that single-ended and both-end combine by the present invention, and single-ended scanning adopts one by one successively the method for touch screen scanning, and a point situation discusses the whole touch-screen of scanning or partial sweep touch-screen, therefore not only sweep time is decreased, effectively reduce operand, make the also large degree raising of its execution efficiency, report point rate is faster, and Consumer's Experience is more smooth.
Claims (6)
1. a scan method for touch-screen, described touch-screen comprises the capacitance matrix be made up of several electrodes, and it comprises the following steps:
The first step: the method successively touch screen scanning scanning the single-ended scan electrode one by one of whole Touch Screen with both-end, wherein said both-end scanning refers to and scans the row and column of touch-screen capacitance matrix respectively, to touch-screen capacitance matrix advance line scanning time, scan two row or two row at every turn simultaneously, obtain the capacitive differential of two rows or two columns, described single-ended scanning refers to and scans the row and column of touch-screen capacitance matrix respectively, to touch-screen capacitance matrix advance line scanning time, each scanning a line or row, obtain the capacitive differential of row or row and reference capacitance, and adopt during described single-ended touch screen scanning be compartment scanning, concrete grammar is as follows: when first time is scanned, first obtain some groups of capacitive differential with both-end scan mode, then first group of capacitive differential is obtained with single-ended compartment scan mode, when second time scans, or first obtain some groups of capacitive differential with both-end scan mode, then with single-ended compartment scanning acquisition second group of capacitive differential, order successively, until complete last scanning, obtains last group capacitive differential,
Second step: adopt the method touch screen scanning that both-end scans within a period of time, if and to confirm on touch-screen not finger, then adopt both-end to scan whole touch-screen, if once confirm that touch-screen has finger, then adopt partial sweep touch-screen, and only scanning there is the region pointed and touch;
3rd step: continue with the method successively touch screen scanning of both-end touch screen scanning in conjunction with single-ended scan electrode one by one within a period of time, and during both-end touch screen scanning, if confirmation touch-screen is not pointed, both-end is then adopted to scan whole touch-screen, if once confirm that touch-screen has finger, then adopt partial sweep touch-screen, and only scanning there is the region pointed and touch;
Finally, touch screen scanning is continued with the method for above-mentioned second step and the 3rd step.
2. the scan method of touch-screen as claimed in claim 1, is characterized in that: the capacitive differential obtained with single-ended compartment scan mode during each scanning in the described first step all stores its numerical value and till being stored into last scanning in follow-up scanning process always.
3. the scan method of touch-screen as claimed in claim 1, it is characterized in that: whether described confirmation touch-screen has the method for finger as follows: judge whether maximum influence value is greater than the threshold value of preset in advance, if be greater than the threshold value of preset in advance, then think that touch-screen has finger; If be not more than the threshold value of preset in advance, then think that touch-screen does not have finger.
4. the scan method of touch-screen as claimed in claim 1, is characterized in that: described a period of time can identical also can not be identical, user can arrange the suitable time as required.
5. the scan method of touch-screen as claimed in claim 1, is characterized in that: during described both-end scanning, several electrodes on touch-screen are connected respectively in the respective pins of chip.
6. the scan method of touch-screen as claimed in claim 1, it is characterized in that: during described single-ended scanning, several electrodes on touch-screen are connected respectively in the respective pins of chip, and ground connection after chip external reference capacitance of pin.
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| CN201210366698.XA CN102880368B (en) | 2012-09-28 | 2012-09-28 | A kind of scan method of touch-screen |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103092451B (en) * | 2013-01-29 | 2019-02-15 | 苏州瀚瑞微电子有限公司 | The scan method of touch screen |
| CN103197794B (en) * | 2013-03-05 | 2016-03-09 | 北京京东方光电科技有限公司 | A kind of touch detecting method and device |
| TWI502456B (en) * | 2013-03-18 | 2015-10-01 | Focaltech Systems Co Ltd | Mutual capacitance touch screen and touch-sensitive method |
| CN103235664A (en) * | 2013-04-27 | 2013-08-07 | 深圳市金立通信设备有限公司 | Terminal and control method of touch screen |
| CN103761015A (en) * | 2013-12-30 | 2014-04-30 | 深圳贝特莱电子科技有限公司 | Scanning method and system for capacitive touch screen control chip |
| CN104536627B (en) | 2014-12-29 | 2017-11-14 | 厦门天马微电子有限公司 | A kind of touch-control driving testing circuit, display panel and display device |
| CN107168596B (en) * | 2017-07-25 | 2020-09-22 | 业成科技（成都）有限公司 | Scanning method of capacitive touch screen and capacitive touch screen |
| CN110174964B (en) * | 2019-05-06 | 2022-07-29 | Oppo广东移动通信有限公司 | Scanning method, scanning device, electronic device and computer-readable storage medium |
| CN111475054B (en) * | 2020-05-28 | 2023-10-17 | Tcl华星光电技术有限公司 | Mutual capacitance type touch screen driving method and device and terminal equipment |
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| TWI291642B (en) * | 2004-07-15 | 2007-12-21 | N trig ltd | A tracking window for a digitizer system |
| CN101840297A (en) * | 2010-04-07 | 2010-09-22 | 敦泰科技(深圳)有限公司 | Touch detection method and detection circuit of capacitance-type touch screen |
| CN102662536A (en) * | 2012-03-07 | 2012-09-12 | 旭曜科技股份有限公司 | Capacitive multi-touch switching model drive method |
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| CN101840297A (en) * | 2010-04-07 | 2010-09-22 | 敦泰科技(深圳)有限公司 | Touch detection method and detection circuit of capacitance-type touch screen |
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