CN102880368A - Method for scanning touch screen - Google Patents
Method for scanning touch screen Download PDFInfo
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- CN102880368A CN102880368A CN201210366698XA CN201210366698A CN102880368A CN 102880368 A CN102880368 A CN 102880368A CN 201210366698X A CN201210366698X A CN 201210366698XA CN 201210366698 A CN201210366698 A CN 201210366698A CN 102880368 A CN102880368 A CN 102880368A
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Abstract
The invention relates to a method for scanning a touch screen. The method is characterized in that a mode of combining double-end scanning with single-end scanning is adopted, a method for successively scanning regions of the touch screen one by one is adopted for single-end scanning, and whether the touch screen is scanned integrally or locally is discussed according to conditions. Accordingly, the scanning time is shortened, calculation is effectively reduced, the execution efficiency is improved to the great extent, the point reporting rate is high, and user experience is 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 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 scan mode of touch-screen mostly is to judge according to scanning result which sensing region is by close or touching again after scanning successively whole sensing regions, and then according to by near or the sensing region of touching, calculate finger or contact tool institute near or single-point or the multi-point touch position touched.Because above-mentioned scan mode is that whole sensing regions are lined by line scan, if when the sensing region number is too much, then can lengthen the sweep time of touch-screen and operand also can increase, cause it to carry out efficient and also can significantly reduce, affected a newspaper point rate.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 be how to provide a kind of can save time and can be fine the scan method of raising newspaper point rate.
To achieve these goals, the invention provides a kind of scan method of touch-screen, described touch-screen comprises the capacitance matrix that is comprised of several electrodes, it may further comprise the steps: the first step: the method that scans the single-ended one by one scan electrode of whole Touch Screen with both-end is touch screen scanning one by one, the scanning of wherein said both-end refers to respectively the row and column of touch-screen capacitance matrix is scanned, advancing during line scanning to the touch-screen capacitance matrix, scan simultaneously two row or two row at every turn, obtain the electric capacity difference of two rows or two columns, described single-ended scanning refers to respectively the row and column of touch-screen capacitance matrix is scanned, advancing during line scanning to the touch-screen capacitance matrix, each scanning delegation or row, obtain row or the electric capacity difference of row and reference capacitance, and what adopt during described single-ended touch screen scanning is that compartment scans; Second step: the method touch screen scanning that within a period of time, adopts both-end scanning, if and confirm not point on the touch-screen, then adopt both-end to scan whole touch-screen, if in case confirm that finger is arranged on the touch-screen, then adopt the partial sweep touch-screen, and only scan the zone that has finger touches to arrive; The 3rd step: within a period of time, continue with the both-end touch screen scanning in conjunction with the method for single-ended one by one scan electrode touch screen scanning one by one, and during the both-end touch screen scanning, if do not point on the affirmation touch-screen, then adopt both-end to scan whole touch-screen, if in case confirm that finger is arranged on the touch-screen, then adopt the partial sweep touch-screen, and only scan the zone that has finger touches to arrive; At last, continue touch screen scanning with above-mentioned second step and the method in the 3rd step.
Compared with prior art, the scan method of touch-screen of the present invention has not only reduced sweep time, effectively reduces operand, makes it carry out also large degree raising of efficient, and newspaper point rate is faster, and the user experiences more smooth.
Description of drawings
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
The present invention is further illustrated below in conjunction with drawings and Examples.
Touch-screen of the present invention comprises the capacitance matrix that is comprised of several electrodes, and it relates to two kinds of scan modes, and a kind of is the both-end scan mode, and a kind of is single-ended scan mode.So-called both-end scanning refers to respectively the row and column of touch-screen capacitance matrix is scanned, and to the advancing during line scanning of touch-screen capacitance matrix, scans simultaneously two row or two row at every turn, obtains the electric capacity difference of two rows or two columns; So-called single-ended scanning refers to respectively the row and column of touch-screen capacitance matrix is scanned, and to the advancing during line scanning of touch-screen capacitance matrix, scans delegation or row at every turn, obtains the electric capacity difference of row or row and reference capacitance.The below discusses the method for both-end scanning and single-ended scanning for example:
Please refer to shown in Figure 1, if touch-screen 1 is provided with several electrodes 10, the coordinate of its first row on directions X (laterally) is respectively X11, X12, X13......, the coordinate of the second row on directions X (laterally) is respectively X21, X22, X23......, the like, be connected respectively on the respective pins of chip 2.Capacitive touch screen both-end when scanning, take line scanning as example, when scanning for the first time, if with first electrode of the first row as with reference to end R, first electrode of the second row is as scanning end S, the equal unsettled or ground connection of other electrode this moment is obtained first group of electric capacity difference Raw12; When in like manner scanning for the second time, this moment first electrode of the second row as with reference to end R, first electrode of tactic the third line is as scanning end S, the equal unsettled or ground connection of other electrode this moment is obtained second group of electric capacity difference Raw23; The like, until obtain (N-1) group electric capacity difference Raw (N-2) (N-1), and according to the method described above, complete touch-screen of sequential scanning.
Please refer to shown in Figure 2, during capacitive touch screen 1 single-ended scanning, electrode on the described touch-screen 1 is connected respectively on the respective pins of chip 2, and ground connection behind the external reference capacitance C of a pin of chip 2 is take line scanning as example, when scanning for the first time, if with first electrode of the first row as scanning end S, that electrode of described connection reference capacitance C is as with reference to end R, and the equal unsettled or ground connection of other electrode this moment is obtained first group of electric capacity difference Raw11c; When in like manner scanning for the second time, first electrode of the second row is as scanning end S, and that electrode of described connection reference capacitance C is as with reference to end R, and the equal unsettled or ground connection of other electrode this moment is obtained second group of electric capacity difference Raw21c; The like, until obtain N group electric capacity difference Rawnnc, and according to the method described above, complete touch-screen of sequential scanning.
During single-ended touch screen scanning 1 of the present invention, what adopt is compartment scanning, take capacitance matrix shown in Figure 1 as example, when namely scanning for the first time, as scanning end S with first electrode of the first row, connect that electrode of reference capacitance C as reference end R, when scanning for the second time, as scanning end S with first electrode of the third line, connect that electrode of reference capacitance C as with reference to end R...... in like manner, as scanning end S, connect that electrode of reference capacitance C as reference end R with second electrode of secondary series, the 4th electrode of secondary series connects that electrode of reference capacitance C as reference end R...... as scanning end S; Sequential scanning touch-screen successively.
Please refer to shown in Figure 3, the scan method of touch-screen of the present invention, the first step: the method that scans the single-ended one by one scan electrode of whole Touch Screen with both-end is touch screen scanning one by one, its concrete grammar is as follows: when scanning for the first time, obtain (N-1) group electric capacity difference Raw (N-2) (N-1) with the both-end scan mode first, then obtain first group of electric capacity difference Raw11c with single-ended compartment scan mode; When scanning for the second time, or obtain (N-1) group electric capacity difference Raw (N-2) (N-1) with the both-end scan mode first, then obtain second group of electric capacity difference Raw31c with single-ended compartment scanning; When scanning for the third time, continue to obtain (N-1) group electric capacity difference Raw (N-2) (N-1) with the both-end scan mode, then obtain the 3rd group of electric capacity difference Raw22c with single-ended compartment scanning; Order until finish last scanning, is obtained last group electric capacity difference successively; Second step: the method touch screen scanning that within a period of time, adopts both-end scanning, if and confirm not point on the touch-screen, then adopt both-end to scan whole touch-screen, if in case confirm that finger is arranged on the touch-screen, then adopt the partial sweep touch-screen, and only scan the zone that has finger touches to arrive; The 3rd step: within a period of time, continue with the both-end touch screen scanning in conjunction with the method for single-ended one by one scan electrode touch screen scanning one by one, and during the both-end touch screen scanning, if do not point on the affirmation touch-screen, then adopt both-end to scan whole touch-screen, if in case confirm that finger is arranged on the touch-screen, then adopt the partial sweep touch-screen, and only scan the zone that has finger touches to arrive; At last, continue touch screen scanning with above-mentioned second step and the method in the 3rd step.
In the scan method first step of above-mentioned touch-screen, the electric capacity difference of obtaining with single-ended compartment scan mode during each scanning has all been stored its numerical value and has been stored into always and finish till the last scanning in follow-up scanning process, the first group of electric capacity difference Raw11c that obtains with single-ended compartment scan mode when namely scanning for the first time, when scanning for the second time, obtained second group of electric capacity difference Raw31c with single-ended compartment scanning, all data that this moment, single-ended compartment scanning was obtained are exactly Raw11c and Raw31c, successively sequentially, during to last scanning, all data that single-ended compartment scanning is obtained are exactly Raw11c, Raw31c......, Rawnnc.
Whether have the method for finger as follows on the above-mentioned affirmation touch-screen: judge described maximum influence value whether greater than the threshold value of preset in advance, if greater than the threshold value of preset in advance, then thinking has finger on the touch-screen; If be not more than the threshold value of preset in advance, think then on the touch-screen that finger does not bump.And in above-mentioned second step and the 3rd step related a period of time can be identical can be not identical yet, the user can arrange the suitable time as required.
Because the method touch screen scanning that the present invention combines single-ended and both-end, and the one by one method of touch screen scanning is adopted one by one in single-ended scanning, and a minute situation to have discussed be scanning whole touch-screen or partial sweep touch-screen, therefore not only reduced sweep time, effectively reduce operand, make it carry out also large degree raising of efficient, newspaper point rate is faster, and the user experiences more smooth.
Claims (7)
1. the scan method of a touch-screen, described touch-screen comprises the capacitance matrix that is comprised of several electrodes, it may further comprise the steps:
The first step: the method that scans the single-ended one by one scan electrode of whole Touch Screen with both-end is touch screen scanning one by one, the scanning of wherein said both-end refers to respectively the row and column of touch-screen capacitance matrix is scanned, advancing during line scanning to the touch-screen capacitance matrix, scan simultaneously two row or two row at every turn, obtain the electric capacity difference of two rows or two columns, described single-ended scanning refers to respectively the row and column of touch-screen capacitance matrix is scanned, advancing during line scanning to the touch-screen capacitance matrix, each scanning delegation or row, obtain row or the electric capacity difference of row and reference capacitance, and what adopt during described single-ended touch screen scanning is that compartment scans;
Second step: the method touch screen scanning that within a period of time, adopts both-end scanning, if and confirm not point on the touch-screen, then adopt both-end to scan whole touch-screen, if in case confirm that finger is arranged on the touch-screen, then adopt the partial sweep touch-screen, and only scan the zone that has finger touches to arrive;
The 3rd step: within a period of time, continue with the both-end touch screen scanning in conjunction with the method for single-ended one by one scan electrode touch screen scanning one by one, and during the both-end touch screen scanning, if do not point on the affirmation touch-screen, then adopt both-end to scan whole touch-screen, if in case confirm that finger is arranged on the touch-screen, then adopt the partial sweep touch-screen, and only scan the zone that has finger touches to arrive;
At last, continue touch screen scanning with above-mentioned second step and the method in the 3rd step.
2. the scan method of touch-screen as claimed in claim 1, it is characterized in that: the concrete grammar of the described first step is as follows: when scanning for the first time, first obtain some groups of electric capacity differences with the both-end scan mode, then obtain first group of electric capacity difference with single-ended compartment scan mode; When scanning for the second time, or obtain some groups of electric capacity differences with the both-end scan mode first, then obtain second group of electric capacity difference with single-ended compartment scanning; Order until finish last scanning, is obtained last group electric capacity difference successively.
3. the scan method of touch-screen as claimed in claim 2 is characterized in that: the electric capacity difference of obtaining with single-ended compartment scan mode during each scanning in the described first step has all been stored its numerical value and has been stored into always and finish till the last scanning in follow-up scanning process.
4. the scan method of touch-screen as claimed in claim 1, it is characterized in that: whether have the method for finger as follows on the described affirmation touch-screen: judge that described maximum influence value is whether greater than the threshold value of preset in advance, if greater than the threshold value of preset in advance, then thinking has finger on the touch-screen; If be not more than the threshold value of preset in advance, then thinking does not have finger on the touch-screen.
5. the scan method of touch-screen as claimed in claim 1 is characterized in that: described a period of time can be identical can be not identical yet, the user can arrange the suitable time as required.
6. the scan method of touch-screen as claimed in claim 1, it is characterized in that: during described both-end scanning, several electrodes on the touch-screen are connected respectively on the respective pins of chip.
7. the scan method of touch-screen as claimed in claim 1, it is characterized in that: during described single-ended scanning, several electrodes on the touch-screen are connected respectively on the respective pins of chip, and ground connection behind the external reference capacitance of pin of chip.
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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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| CN201210366698.XA CN102880368B (en) | 2012-09-28 | 2012-09-28 | A kind of scan method of touch-screen |
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Cited By (9)
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| CN103092451A (en) * | 2013-01-29 | 2013-05-08 | 苏州瀚瑞微电子有限公司 | Touch screen scanning method |
| CN103197794A (en) * | 2013-03-05 | 2013-07-10 | 北京京东方光电科技有限公司 | Method and device for touch detecting |
| 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 |
| CN104536627A (en) * | 2014-12-29 | 2015-04-22 | 厦门天马微电子有限公司 | Touch drive detecting circuit, display panel and display device |
| TWI502456B (en) * | 2013-03-18 | 2015-10-01 | Focaltech Systems Co Ltd | Mutual capacitance touch screen and touch-sensitive method |
| CN107168596A (en) * | 2017-07-25 | 2017-09-15 | 业成科技（成都）有限公司 | The scan method and capacitive touch screen of capacitive touch screen |
| CN110174964A (en) * | 2019-05-06 | 2019-08-27 | Oppo广东移动通信有限公司 | Scan method, scanning means, electronic equipment and computer readable storage medium |
| CN111475054A (en) * | 2020-05-28 | 2020-07-31 | 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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| CN103092451A (en) * | 2013-01-29 | 2013-05-08 | 苏州瀚瑞微电子有限公司 | Touch screen scanning method |
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| 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 |
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| CN104536627A (en) * | 2014-12-29 | 2015-04-22 | 厦门天马微电子有限公司 | Touch drive detecting circuit, display panel and display device |
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| CN107168596A (en) * | 2017-07-25 | 2017-09-15 | 业成科技（成都）有限公司 | The scan method and capacitive touch screen of capacitive touch screen |
| 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 |
| CN110174964A (en) * | 2019-05-06 | 2019-08-27 | Oppo广东移动通信有限公司 | Scan method, scanning means, electronic equipment and computer readable storage medium |
| 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 |
| CN111475054A (en) * | 2020-05-28 | 2020-07-31 | Tcl华星光电技术有限公司 | Mutual capacitance type touch screen driving method and device and terminal equipment |
| 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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| CN102880368B (en) | 2015-09-23 |
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