WO2021237933A1 - 互容式电容屏的扫描控制方法及装置、互容式电容屏 - Google Patents

互容式电容屏的扫描控制方法及装置、互容式电容屏 Download PDF

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WO2021237933A1
WO2021237933A1 PCT/CN2020/105852 CN2020105852W WO2021237933A1 WO 2021237933 A1 WO2021237933 A1 WO 2021237933A1 CN 2020105852 W CN2020105852 W CN 2020105852W WO 2021237933 A1 WO2021237933 A1 WO 2021237933A1
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electrodes
scan
drive electrodes
scan list
drive
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PCT/CN2020/105852
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English (en)
French (fr)
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徐协增
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深圳市鸿合创新信息技术有限责任公司
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Publication of WO2021237933A1 publication Critical patent/WO2021237933A1/zh

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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416Control or interface arrangements specially adapted for digitisers
    • G06F3/04166Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving

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  • This application relates to the field of touch technology, and in particular to a scanning control method and device of a mutual-capacitive capacitive screen, and a mutual-capacitive capacitive screen.
  • capacitive touch screens have been widely used in electronic products such as mobile phones and interactive tablets.
  • capacitive touch screens mainly include self-capacitive touch screens and mutual-capacitive touch screens, as shown in Figure 1.
  • the mutual-capacitive touch screen includes a plurality of driving electrodes T (1) ⁇ T (N) and a plurality of receiving electrodes R (1) ⁇ R (M), the driving electrodes and the receiving electrodes are arranged to cross, thereby forming a plurality of mutual capacitance sensing Nodes, the scanning method used is as follows: in each frame of scanning, drive signals are sent to multiple drive electrodes T(1) to T(N) in turn, and some or all of the multiple receiving electrodes R1 to Rn receive signals at the same time , This can ensure that when a touch event occurs at any position, the capacitive screen can find the touch position after the end of each frame scan.
  • the main purpose of this application is to provide a scanning control method and device for a mutual-capacitive capacitive screen, and a mutual-capacitive capacitive screen, which can increase the scanning frame rate and at the same time have better touch accuracy.
  • the technical solution of the present application provides a scanning control method for a mutual-capacitive capacitive screen.
  • the mutual-capacitive capacitive screen includes N driving electrodes, where N is a positive integer, and the method includes:
  • the first scan list is established based on the drive electrodes that detect the touch signal in the K-th frame scan; where the first scan list contains the drive electrodes that detect the touch signal and each drive electrode that detects the touch signal is in N Several adjacent drive electrodes in the drive electrodes, and the drive electrodes in the first scan list do not overlap each other;
  • drive electrodes are selected from several drive electrodes equally spaced between N drive electrodes to establish a second scan list; wherein, the drive electrodes in the second scan list and the drive electrodes in the first scan list are different from each other. repeat;
  • X is the preset value.
  • each drive electrode that detects a touch signal determine its adjacent drive electrodes among the N drive electrodes as its adjacent Z drive electrodes among the N drive electrodes, and Z is a preset positive integer .
  • Z is a multiple of 2
  • the adjacent Z drive electrodes include Z/2 drive electrodes adjacent to the left and Z/2 drive electrodes adjacent to the right.
  • searching for the preset adjacent electrode selection value Z by using the number of drive electrodes for which touch signals are detected in the K-th frame scan includes:
  • the several drive electrodes with the N drive electrodes equally spaced are the L drive electrodes with the N drive electrodes equally spaced, and the number of drive electrodes in the second scan list is the same as the number of drive electrodes in the first scan list.
  • the sum of the number of driving electrodes is L, which is a preset value.
  • establishing the second scan list includes:
  • the preset electrode sequence is the sequence of L drive electrodes at equal intervals
  • the current judgment object is not in the first scan list, add the current judgment object to the second scan list, and then judge whether the sum of the number of drive electrodes in the second scan list and the number of drive electrodes in the first scan list is L. If yes, the establishment of the second scan list is finished, if not, update the current judgment object to the next driving electrode in the preset electrode sorting, and then judge whether the current judgment object is in the first scan list.
  • the driving electrodes used in the first frame scan and/or the second frame scan after the touch screen is activated are N driving electrodes with several driving electrodes at even intervals.
  • the technical solution of the present application also provides a scanning control device for a mutual-capacitive capacitive screen.
  • the mutual-capacitive capacitive screen includes N drive electrodes, where N is a positive integer, and includes:
  • the judgment module is used to judge whether a touch signal is detected in the K-th frame scan, and K is any positive integer;
  • the first processing module is configured to, if it is determined that the touch signal is not detected in the K-th frame scanning, use several drive electrodes with equal intervals of the N drive electrodes as electrodes to be scanned, wherein the equal interval is at least one drive electrode;
  • the second processing module is configured to, if it is determined that the touch signal is detected in the K-th frame scan, establish a first scan list according to the drive electrodes that detect the touch signal in the K-th frame scan; wherein, the first scan list includes the touch signal detected A number of adjacent drive electrodes among the N drive electrodes of the drive electrodes and each drive electrode that detects a touch signal, and the drive electrodes in the first scan list do not overlap each other;
  • the third processing module is used to select driving electrodes from a plurality of driving electrodes equally spaced in the N driving electrodes according to the first scan list to establish a second scan list, and to drive the driving in the first scan list and the second scan list
  • the electrodes are used as electrodes to be scanned; wherein, the driving electrodes in the second scan list and the driving electrodes in the first scan list do not overlap each other;
  • the scanning module is used to input a driving signal to the electrode to be scanned when the (K+X)th frame scanning is performed;
  • X is the preset value.
  • the technical solution of the present application also provides a scanning control device for a mutual-capacitive capacitive screen.
  • the mutual-capacitive capacitive screen includes N driving electrodes, where N is a positive integer, and the device includes a processor and A memory coupled with the processor, where the processor is used to execute instructions in the memory to implement the scan control method provided by the first aspect or any one of its embodiments.
  • the technical solution of the present application also provides a mutual capacitance type capacitive screen, including the scanning control device provided in the second or third aspect.
  • the scanning control method of the mutual-capacitive capacitive screen provided in this application uses the scanning result of the K-th frame scan to determine the scanning mode of the subsequent (K+X)-th frame scan. If the K-th frame scan does not detect a touch signal, then ( K+X) frame scanning adopts several driving electrodes at equal intervals. If a touch signal is detected in the K-th frame scanning, the driving electrode selected for the (K+X) frame scanning is determined according to the position of the touch, which can not only improve the scanning Frame rate, while also having better touch accuracy.
  • Figure 1 is a schematic diagram of the structure of a mutual capacitive touch screen
  • FIG. 2 is a flowchart of a scanning control method of a mutual capacitance capacitive screen provided by an embodiment of the present application
  • FIG. 3 is a schematic structural diagram of a scanning control device for a mutual-capacitive capacitive screen provided by an embodiment of the present application.
  • step numbers (letter or number numbers) used in this application to refer to some specific method steps are only for the convenience and conciseness of description, and they are by no means restricted by letters or numbers. Order. Those skilled in the art can understand that the order of the steps of the relevant method should be determined by the technology itself, and should not be improperly restricted due to the existence of step numbers.
  • FIG. 2 is a flowchart of a scanning control method of a mutual-capacitive capacitive screen provided by an embodiment of the present application.
  • the mutual-capacitive capacitive screen includes N driving electrodes, where N is a positive integer, and the method includes steps A to F.
  • Step A Determine whether a touch signal is detected in the K-th frame scan, if not, execute step B, if yes, execute step C, where K is any positive integer.
  • Step B Use several drive electrodes with equal intervals between the N drive electrodes as electrodes to be scanned, wherein the equal interval is at least one drive electrode.
  • the several drive electrodes at equal intervals are used as drive electrodes for the (K+X)-th frame scanning, and when the (K+X)-th frame scanning is performed, drive signals are sequentially sent to the drive electrodes that are determined to be used, and pass The signal of the receiving electrode determines the touch information.
  • Step C Establish a first scan list based on the drive electrodes that have detected touch signals in the K-th frame scan; wherein, the first scan list contains drive electrodes that have detected touch signals and each drive electrode that has detected touch signals has N Several adjacent driving electrodes in the driving electrodes, and the driving electrodes in the first scan list do not overlap each other.
  • each drive electrode that detects a touch signal its adjacent drive electrodes among the N drive electrodes are multiple drive electrodes close to it, and may include multiple drive electrodes adjacent to its left side (such as One or multiple consecutive drive electrodes adjacent to the left) and/or several drive electrodes adjacent to the right (such as one or multiple consecutive drive electrodes adjacent to the right).
  • Step D According to the first scan list, select drive electrodes from a number of drive electrodes equally spaced from the N drive electrodes to establish a second scan list; wherein, the drive electrodes in the second scan list are the same as those in the first scan list. The electrodes do not overlap each other.
  • Step E Use the driving electrodes in the first scan list and the second scan list as electrodes to be scanned.
  • the drive electrodes in the first scan list and the second scan list are used as drive electrodes for the (K+X)th frame scan, and when the (K+X)th frame scan is performed, the drive electrodes that are determined to be used are sequentially sent Drive the signal, and determine the touch information by receiving the signal from the electrode.
  • Step F When performing the (K+X)th frame scan, input a driving signal to the electrode to be scanned.
  • X is the preset value.
  • the scanning control method of the mutual-capacitive capacitive screen uses the scanning result of the K-th frame scanning to determine the scanning method of the (K+X)-th frame scanning after the scanning. If the K-th frame scanning does not detect a touch signal, Then (K+X) frame scanning adopts several driving electrodes at equal intervals. If a touch signal is detected in the K-th frame scanning, the driving electrode selected for the (K+X) frame scanning is determined according to the location of the touch. This will not only increase the scanning frame rate, but also have better touch accuracy.
  • the scan result of the Kth frame scan is used to determine the scan mode of the (K+X)th frame scan after this. Since this process requires a certain amount of calculation processing time, the (K+X-)th frame can be executed on the touch screen. 1) During frame scanning (that is, when performing the previous frame scanning of the (K+X)th frame), perform step A to step E (that is, the process of determining the scanning mode of the (K+X)th frame scanning).
  • X can be any integer.
  • X can be 2, 3, 4, 5, etc., where the maximum allowable value of X can be determined by the time it takes to scan each frame.
  • the value of X is 2 (in this case, when the touch screen performs the K-th frame scan, use the above steps A to D to determine the (K+2)-th frame scan Scanning method).
  • the scanning method please
  • the N drive electrodes are equally spaced and the N drive electrodes are equally spaced and the L drive electrodes are equally spaced.
  • the number of drive electrodes in the second scan list is equal to that in the first scan list.
  • the sum of the number of driving electrodes is L, which is a preset value.
  • L is the number of driving electrodes allowed to be arranged at equal intervals among the N driving electrodes of the touch screen. For example, if the interval is 1 driving electrode, then L is the largest integer not greater than N/2, if the interval is 2 driving electrodes, then L is the largest integer not greater than N/3, if the interval is 4 For driving electrodes, L is the largest integer not greater than N/4... That is, in this application, when performing the (K+X)th frame scan, the number of driving electrodes used is not more than N/2, so the consumed scan time will not be longer than half of the scan time required by the prior art, so that The scanning frame rate is greatly improved, and it can also have better touch recognition accuracy.
  • the first frame scan (ie, the first frame scan after the touch screen is activated) and the second frame scan (ie, the second frame scan after the touch screen is activated) of the touch screen adopts the driving electrodes for the above N drives.
  • driving electrodes such as L driving electrodes
  • L driving electrodes with evenly spaced electrodes.
  • the number of driving electrodes used for each frame of scanning is L (that is, the time consumed for each frame of the touch screen is the same).
  • the first scan list of the (K+X)-th frame scan includes the drive electrodes that detect the touch signal in the K-th frame scan and the drive electrodes that detect the touch signal in the N Several adjacent driving electrodes among the driving electrodes.
  • the number of adjacent drive electrodes selected can be a fixed value, and the same number of drive electrodes can be respectively taken on the left and right sides.
  • the number of adjacent drive electrodes selected can be 2 (ie one adjacent drive electrode on the left and right) or 4 (ie two adjacent drive electrodes on each of the left and right) .
  • the drive electrode that detects the touch signal in the K-th frame scan only contains the i-th (that is, the line sequence is i) drive electrode T(i), and its adjacent drive electrodes include the i-th drive electrode T(i).
  • the number of adjacent drive electrodes on the edge side may be insufficient.
  • the drive electrodes adjacent to the edge side of the drive electrodes may only include the actual number of drive electrodes.
  • the second drive electrode R(2) there is only one adjacent drive electrode R(1) on its left side.
  • the second drive electrode R(2) selects the second drive electrode R(2)
  • the adjacent driving electrodes may only include three driving electrodes R(1), R(3) and R(4).
  • the number of selected adjacent drive electrodes may be adjusted according to the number of drive electrodes for which touch signals are detected in the K-th frame scan.
  • the method for determining a plurality of adjacent driving electrodes among the N driving electrodes for each driving electrode that detects a touch signal includes:
  • each drive electrode for which a touch signal is detected several adjacent drive electrodes among the N drive electrodes are Z adjacent drive electrodes among the N drive electrodes, and Z is a preset positive integer.
  • the aforementioned Z is a multiple of 2.
  • the adjacent Z drive electrodes include Z/2 drive electrodes adjacent to the left and Z/2 drive electrodes adjacent to the right.
  • the number of driving electrodes that have detected touch signals in the K-th frame scan may be used to look up the adjacent electrode selection value Z in the pre-stored correspondence table.
  • the correspondence table the larger the number of drive electrodes that detect the touch signal in the K-th frame scan, the smaller the value of the adjacent electrode selection value Z. That is, when there are fewer touch positions recognized, the recognition accuracy of the touch position can be further improved by a larger Z, and when there are more touch positions recognized, more touches can be satisfied by less Z. Further identification of location.
  • the foregoing correspondence table may include at least one of the following correspondence relationships:
  • the adjacent electrode selection value Z is 14;
  • the adjacent electrode selection value Z is 12;
  • the adjacent electrode selection value Z is 10;
  • the adjacent electrode selection value Z is 8;
  • the adjacent electrode selection value Z is 6;
  • the adjacent electrode selection value Z is 4;
  • the adjacent electrode selection value Z is 2.
  • the number of driving electrodes used in the (K+X)th frame scan is still L, that is, after the first scan list of the (K+X)th frame scan is established in step C, the (K+X)th frame scan +X)
  • the number of drive electrodes in the second scan list of frame scan is L minus the number of drive electrodes in the first scan list.
  • the drive electrodes in the second scan list can be selected from the above-mentioned equally spaced L drive electrodes , And do not overlap with the driving electrodes in the first scan list.
  • the first scan list and the second scan list of the (K+X)th frame scan are all the driving electrodes used in the (K+X)th frame scan.
  • driving signals may be input to the driving electrodes in the first scan list in sequence, and then driving signals in the driving electrodes in the second scan list may be input in sequence.
  • the second scan list of the (K+X)th frame scan may also be determined according to the (K+X-1)th frame scan. That is, determine the second scan list of the (K+X)th frame scan, and preferentially select the drive electrodes that are not used in the (K+X-1)th frame scan among the L drive electrodes at equal intervals above, so that some touch screens can be avoided. The area will not be detected for a long time.
  • establishing the second scan list of the (K+X)th frame scan includes the following steps D1 to D6:
  • Step D1 Obtain the last scanned driving electrode in the (K+X-1)th frame scan
  • Step D2 Find the next drive electrode of the last scanned drive electrode in the preset electrode sequence.
  • the preset electrode sequence is the sequence of the L drive electrodes at equal intervals (for example, the sequence is a cyclic sequence from small to large line sequence .Exemplarily, when sorting to the largest line sequence, re-sort from the smallest line sequence);
  • Step D3 take the drive electrode found in step D2 as the current judgment object and execute step D4;
  • Step D4 Determine whether the current judgment object is in the first scan list, if yes, discard the current judgment object and execute step D5, if not, execute step D6;
  • Step D5 Update the current judgment object as the next driving electrode in the preset electrode sorting, and repeat step D4;
  • Step D6 Add the current judgment object to the second scan list, and then judge whether the sum of the number of drive electrodes in the second scan list and the number of drive electrodes in the first scan list is L, if so, the second scan list is established End, if not, go to step D5.
  • the touch screen includes a plurality of driving electrodes T(1) to T(N), and N is a multiple of 2.
  • the dichotomy full-screen scanning is adopted, that is, L is N/2, Each frame scan only needs to scan N/2 driving electrodes, the specific process is as follows:
  • the driving electrodes used in the first frame scan and the second frame scan after the touch screen is activated are T(1), T(3), T(5),..., T(N-1), a total of N/2 Drive electrodes;
  • the scanning method of each frame scan is determined as follows:
  • Step S1 Determine whether a touch signal is detected in the K-th frame scan, if not, execute step S2, if yes, execute step S3, where K is any positive integer;
  • the capacitance sensing node near the touch point changes, that is, when a driving signal is input to a certain driving electrode, the receiving value of the receiving electrode of one or more receiving electrodes suddenly becomes lower, then If it is determined that a touch signal is detected, it can be considered that there may be a touch event.
  • Step S2 It is determined that the driving electrodes used in the scan of the (K+2)th frame are T(1), T(3), T(5), ..., T(N-1).
  • the scan line sequence of the (K+2)-th frame scan is fixed, and it is an interval scan, and the scan time is half that of the prior art.
  • Step S3 Establish the first scan list of the (K+2)th frame scan according to the drive electrodes that detect the touch signal in the Kth frame scan, and then execute step S4.
  • the first scan list may include the drive electrodes that detect the touch signal and each drive electrode that detects the touch signal and 8 adjacent drive electrodes among the N drive electrodes (4 on the left and right are selected),
  • the driving electrodes in the first scan list do not overlap each other, and the accurate position of the touch point can be further obtained through the first scan list.
  • Step S4 Select several driving electrodes from T(1), T(3), T(5),..., T(N-1) according to the first scan list scanned in the (K+2)th frame to establish The second scan list of the (K+2)th frame scan.
  • the sum of the number of drive electrodes in the second scan list and the number of drive electrodes in the first scan list is N/2, and the drive electrodes in the second scan list are different from the drive electrodes in the first scan list. Repeat, the new touch point can be detected through the second scan list.
  • the number of drive electrodes that need to be scanned in each frame is 64. If the drive electrode that detects the touch signal in the K-th frame scan is T(7), then the (K+2)-th frame scan
  • the second scan list can contain 55 driving electrodes T(13), T(15), T(17), T(19), T(21),..., T(121);
  • the driving electrodes required for the (K+X)-th frame scan include the driving electrodes in the first scan list and the second scan list.
  • the first scan list is calculated and generated by the coordinate points (touch points) obtained by scanning in the Kth frame, in which the number of driving electrodes is determined by the number of driving electrodes that detect a touch signal in the Kth frame scanning (each drive that detects a touch signal)
  • the electrode can be considered as a must-scan area).
  • the driving electrodes scanned after the scanning is adjusted by tracking scanning, only need to scan half (the dichotomy) or a quarter (the quartile) of the driving electrodes in the touch screen, that is, To realize the touch detection of the entire touch screen, it can also reduce the scanning time to half (or one quarter). Therefore, not only can the frame rate of the touch screen be quickly increased, and the touch responsiveness can be improved, but also the touch curve recognition accuracy can be better.
  • FIG. 3 is a schematic structural diagram of a scanning control device for a mutual-capacitive capacitive screen provided by an embodiment of the present application.
  • the device 300 includes:
  • the judging module 310 is used for judging whether a touch signal is detected in the K-th frame scan, and K is any positive integer;
  • the first processing module 320 is configured to, if it is determined that a touch signal is not detected in the K-th frame scanning, use a plurality of driving electrodes equally spaced by the N driving electrodes as electrodes to be scanned, wherein the equal space is at least one driving electrode;
  • the second processing module 330 is configured to, if it is determined that the touch signal is detected in the K-th frame scan, establish a first scan list according to the drive electrodes that detect the touch signal in the K-th frame scan; wherein, the first scan list includes the touch detected
  • the driving electrodes of the signal and the driving electrodes for each detecting the touch signal are adjacent to several driving electrodes among the N driving electrodes, and the driving electrodes in the first scan list do not overlap each other;
  • the third processing module 340 is configured to select driving electrodes from a plurality of driving electrodes equally spaced in the N driving electrodes according to the first scan list to establish a second scan list, and to combine the first scan list and the second scan list
  • the driving electrodes are used as electrodes to be scanned; wherein, the driving electrodes in the second scan list and the driving electrodes in the first scan list do not overlap each other;
  • the scanning module 350 is used for inputting a driving signal to the electrode to be scanned when the (K+X)th frame scanning is performed;
  • X is the preset value.
  • the scanning control device for the mutual capacitance capacitive screen uses the scanning result of the K-th frame scan to determine the scanning mode of the (K+X)-th frame scan after the scan. If the K-th frame scan does not detect a touch signal, Then the (K+X) frame scan adopts L drive electrodes at equal intervals. If the touch signal is detected in the K-th frame scan, the drive electrode selected for the (K+X) frame scan is determined according to the location of the touch, and the The number of driving electrodes is still L, which not only can increase the scanning frame rate, but also has better touch accuracy.
  • the second processing module 330 includes:
  • the numerical value determining unit is used for searching the preset adjacent electrode selection value Z by using the number of driving electrodes for which the touch signal is detected in the K-th frame scan;
  • the determining unit is used to determine, for each drive electrode for which a touch signal is detected, its adjacent drive electrodes among the N drive electrodes as its adjacent Z drive electrodes among the N drive electrodes, Z is The preset positive integer.
  • Z is a multiple of 2
  • the adjacent Z drive electrodes include Z/2 drive electrodes adjacent to the left and Z/2 drive electrodes adjacent to the right.
  • the value determining unit is specifically configured to use the number of drive electrodes that have detected touch signals in the K-th frame scan to search for the adjacent electrode selection value Z in the pre-stored correspondence table, wherein, in the correspondence relationship In the table, the larger the number of drive electrodes that detect the touch signal in the K-th frame scan, the smaller the value of the adjacent electrode selection value Z.
  • the N drive electrodes equally spaced several drive electrodes are N drive electrodes equally spaced L drive electrodes, and the number of drive electrodes in the second scan list is equal to the number of drive electrodes in the first scan list.
  • the sum of the quantities is L, and L is the preset value.
  • the third processing module 340 includes:
  • the first acquiring unit is configured to acquire the last scanned drive electrode in the (K+X-1)th frame scan;
  • the first processing unit is used to find the next drive electrode of the last scanned drive electrode in the preset electrode sorting, and the preset electrode sorting is the sorting of L drive electrodes at equal intervals;
  • the second processing unit is configured to use the found driving electrode as the current judgment object
  • the first judgment unit is used to judge whether the current judgment object is in the first scan list
  • the third processing unit is used to if the current judgment object is in the first scan list, discard the current judgment object, update the current judgment object to be the next driving electrode in the preset electrode sorting, and then judge whether the current judgment object is in the first Scan list;
  • the fourth processing unit is configured to add the current judgment object to the second scan list if the current judgment object is not in the first scan list, and then judge the number of drive electrodes in the second scan list and the drive in the first scan list Whether the sum of the number of electrodes is L, if it is, the second scan list is established, if not, update the current judgment object as the next driving electrode in the preset electrode sorting, and then judge whether the current judgment object is in the first scan list .
  • the scanning control device of the mutual-capacitive capacitive screen executes the judgment of whether the touch signal is detected in the K-th frame scanning when the (K+X-1)-th frame scanning is performed.
  • the driving electrodes used in the first frame scanning and/or the second frame scanning after the touch screen is activated are N driving electrodes with several driving electrodes at even intervals.
  • the embodiment of the application also provides a scanning control device for a mutual-capacitive capacitive screen.
  • the mutual-capacitive capacitive screen includes N drive electrodes, where N is a positive integer.
  • the device includes a processor and a memory coupled with the processor. The device is used to execute the instructions in the memory to realize the scanning control method of the mutual-capacitive capacitive screen according to the first aspect of the present application.
  • the embodiment of the present application also provides a mutual-capacitive capacitive screen, which includes any scanning control device described above.
  • each block in the flowchart or block diagram may represent a module, segment, or part of code, and the module, segment, or part of code includes a component for implementing the specified logical function(s) One or more executable instructions.
  • Each block in the block diagram and/or flowchart, and the combination of blocks in the block diagram and/or flowchart can be implemented by a dedicated hardware-based system that performs the specified function or action, or can be implemented by dedicated hardware And a combination of computer instructions.

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Abstract

本申请提供了互容式电容屏的扫描控制方法及装置、互容式电容屏,该方法包括:判断第K帧扫描是否检测到触摸信号;若否,则将所述N个驱动电极中等间隔的若干个驱动电极作为待扫描电极;若是,则根据在所述第K帧扫描中检测到触摸信号的驱动电极建立第一扫描列表;根据所述第一扫描列表从所述N个驱动电极中等间隔的若干个驱动电极中选择驱动电极,以建立第二扫描列表;将所述第一扫描列表和所述第二扫描列表中的驱动电极作为待扫描电极。本申请不但可以提高扫描帧率,还可以具有较好的触摸精度。

Description

互容式电容屏的扫描控制方法及装置、互容式电容屏
相关申请的交叉引用
本申请要求享有于2020年05月29日提交的名称为“互容式电容屏的扫描控制方法及装置、互容式电容屏”的中国专利申请202010477565.4的优先权,该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及触摸技术领域,尤其涉及互容式电容屏的扫描控制方法及装置、互容式电容屏。
背景技术
目前,电容式触摸屏作为人机交互的重要部件,已经广泛应用于手机、交互式平板等电子产品中,目前电容式触摸屏主要包括自容式触摸屏和互容式触摸屏,其中,如图1所示,互容式触摸屏包括多个驱动电极T(1)~T(N)以及多个接收电极R(1)~R(M),驱动电极与接收电极交叉设置,从而形成多个互电容感测节点,其采用的扫描方式如下:在每一帧扫描中,向多个驱动电极T(1)~T(N)依次发送驱动信号,多个接收电极R1~Rn中的部分或者全部同时接收信号,这样可确保当任何位置发生触摸事件时,电容屏都能在每一帧扫描结束后发现触摸位置。
然而,对于目前的互容式触摸屏,由于在每一帧扫描中,都要向所有的驱动电极发送驱动信号,这样就造成了每一帧扫描耗时较长的问题,不利于提高扫描帧率。
发明内容
基于上述现状,本申请的主要目的在于提供一种互容式电容屏的扫描控制方法及装置、互容式电容屏,可以提高扫描帧率,同时还可以具有较好的触摸精度。
为实现上述目的,第一方面,本申请的技术方案提供了一种互容式电容屏的扫描控制方法,互容式电容屏包含N个驱动电极,N为正整数,方法包括:
判断第K帧扫描是否检测到触摸信号,K为任意正整数;
若否,则将N个驱动电极中等间隔的若干个驱动电极作为待扫描电极,其中,等间隔为至少间隔一个驱动电极;
若是,则根据在第K帧扫描中检测到触摸信号的驱动电极建立第一扫描列表;其中,第一扫描列表包含检测到触摸信号的驱动电极以及每一个检测到触摸信号的驱动电极在N个驱动电极中相邻的若干个驱动电极,且第一扫描列表中的驱动电极互不重复;
根据第一扫描列表从N个驱动电极中等间隔的若干个驱动电极中选择驱动电极,以建立第二扫描列表;其中,第二扫描列表中的驱动电极与第一扫描列表中的驱动电极互不重复;
将第一扫描列表和第二扫描列表中的驱动电极作为待扫描电极;
当执行第(K+X)帧扫描时,向待扫描电极输入驱动信号;
其中,X为预设值。
在本申请的一个实施例中,相邻的若干个驱动电极利用以下方法得到:
利用在第K帧扫描中检测到触摸信号的驱动电极的数量查找预设的相邻电极选择值Z;
对于每一个检测到触摸信号的驱动电极,将其在N个驱动电极中相邻的若干个驱动电极确定为其在N个驱动电极中相邻的Z个驱动电极,Z为预设的正整数。
在本申请的一个实施例中,Z为2的倍数,相邻的Z个驱动电极包括左侧相邻的Z/2个驱动电极以及右侧相邻的Z/2个驱动电极。
在本申请的一个实施例中,利用在第K帧扫描中检测到触摸信号的驱动电极的数量查找预设的相邻电极选择值Z包括:
利用在第K帧扫描中检测到触摸信号的驱动电极的数量在预存储的对应关系表中查找相邻电极选择值Z,其中,在对应关系表中,第K帧扫描中检测到触摸信号的驱动电极的数量越大,相邻电极选择值Z的取值越小。
在本申请的一个实施例中,N个驱动电极中等间隔的若干个驱动电极为N个驱动电极中等间隔的L个驱动电极,第二扫描列表中的驱动电极的数量与第一扫描列表中的驱动电极的数量之和为L,L为预设值。
在本申请的一个实施例中,建立第二扫描列表包括:
获取第(K+X-1)帧扫描中最后扫描的驱动电极;
查找最后扫描的驱动电极在预设电极排序中的下一个驱动电极,预设电极排序为对等间隔的L个驱动电极的排序;
将查找到的驱动电极作为当前判断对象;
判断当前判断对象是否在第一扫描列表中;
若当前判断对象在第一扫描列表中,则舍弃当前判断对象,并更新当前判断对象为预设电极排序中的下一个驱动电极,然后判断当前判断对象是否在第一扫描列表中;
若当前判断对象不在第一扫描列表中,则将当前判断对象加入第二扫描列表中,之后判断第二扫描列表中的驱动电极的数量与第一扫描列表中的驱动电极的数量之和是否为L,若是,第二扫描列表建立结束,若否,则更新当前判断对象为预设电极排序中的下一个驱动电极,然后判断当前判断对象是否在第一扫描列表中。
在本申请的一个实施例中,在执行第(K+X-1)帧扫描时,执行判断第K帧扫描是否检测到触摸信号。
在本申请的一个实施例中,触摸屏启动后的第一帧扫描和/或第二帧扫描采用的驱动电极均为N个驱动电极中等间隔的若干个驱动电极。
为实现上述目的,第二方面,本申请的技术方案还提供了一种互容式电容屏的扫描控制装置,互容式电容屏包含N个驱动电极,N为正整数,包括:
判断模块,用于判断第K帧扫描是否检测到触摸信号,K为任意正整数;
第一处理模块,用于若判断第K帧扫描未检测到触摸信号,则将N个驱动电极中等间隔的若干个驱动电极作为待扫描电极,其中,等间隔为至少间隔一个驱动电极;
第二处理模块,用于若判断第K帧扫描检测到触摸信号,则根据在第K帧扫描中检测到触摸信号的驱动电极建立第一扫描列表;其中,第一扫描列表包含检测到触摸信号的驱动电极以及每一个检测到触摸信号的驱动电极在N个驱动电极中相邻的若干个驱动电极,且第一扫描列表中的驱动电极互不重复;
第三处理模块,用于根据第一扫描列表从N个驱动电极中等间隔的若干个驱动电极中选择驱动电极,以建立第二扫描列表,以及将第一扫描列表和第二扫描列表中的驱动电极作为待扫描电极;其中,第二扫描列表中的驱动电极与第一扫描列表中的驱动电极互不重复;
扫描模块,用于当执行第(K+X)帧扫描时,向待扫描电极输入驱动信号;
其中,X为预设值。
为实现上述目的,第三方面,本申请的技术方案还提供了一种互容式电容屏的扫描控制装置,互容式电容屏包含N个驱动电极,N为正整数,装置包括处理器以及与处理器耦合的存储器,其中,处理器用于执行存储器中的指令,实现第一方面或其任一实施例提供的扫描控制方法。
为实现上述目的,第四方面,本申请的技术方案还提供了一种互容式电容屏,包括第二方面或第三方面提供的扫描控制装置。
本申请提供的互容式电容屏的扫描控制方法,利用第K帧扫描的扫描结果确定之后的第(K+X)帧扫描的扫描方式,若第K帧扫描未检测到触摸信号,则(K+X)帧扫描采用等间隔的若干个驱动电极,若第K帧扫描检测到触摸信号,则根据触摸的发生位置确定(K+X)帧扫描选择采用的驱动电极,这样不但可以提高扫描帧率,同时还可以具有较好的触摸精度。
附图说明
通过以下参照附图对本申请实施例的描述,本申请的上述以及其它目的、特征和优点将更为清楚,在附图中:
图1为互容式触摸屏的结构示意图;
图2是本申请实施例提供的一种互容式电容屏的扫描控制方法的流程图;
图3是本申请实施例提供的一种互容式电容屏的扫描控制装置的结构示意图。
具体实施方式
以下基于实施例对本申请进行描述,但是本申请并不仅仅限于这些实施例。在下文对本申请的细节描述中,详尽描述了一些特定的细节部分,为了避免混淆本申请的实质,公知的方法、过程、流程、元件并没有详细叙述。
此外,本领域普通技术人员应当理解,在此提供的附图都是为了说明的目的,并且附图不一定是按比例绘制的。
除非上下文明确要求,否则整个说明书和权利要求书中的“包括”、“包含”等类似词语应当解释为包含的含义而不是排他或穷举的含义;也就是说,是“包括但不限于”的含义。
在本申请的描述中,需要理解的是,术语“第一”、“第二”等仅用于描述目的,而不能理解为指示或暗示相对重要性。此外,在本申请的描述中,除非另有说明,“多个”的含义是两个或两个以上。
需要说明的是,本申请中采用步骤编号(字母或数字编号)来指代某些具体的方法步骤,仅仅是出于描述方便和简洁的目的,而绝不是用字母或数字来限制这些方法步骤的顺序。本领域的技术人员能够明了,相关方法步骤的顺序,应由技术本身决定,不应因步骤编号的存在而被不适当地限制。
参见图2,图2是本申请实施例提供的一种互容式电容屏的扫描控制方法的流程图,互容式电容屏包含N个驱动电极,N为正整数,方法包括步骤A至步骤F。
步骤A:判断第K帧扫描是否检测到触摸信号,若否,执行步骤B,若是,执行步骤C,K为任意正整数。
步骤B:将N个驱动电极中等间隔的若干个驱动电极作为待扫描电极,其中,等间隔为至少间隔一个驱动电极。
即,将该等间隔的若干个驱动电极作为第(K+X)帧扫描采用的驱动电极,在进行第(K+X)帧扫描时,向确定采用的驱动电极依次发送驱动信号,并通过接收电极的信号确定触摸信息。
步骤C:根据在第K帧扫描中检测到触摸信号的驱动电极建立第一扫描列表;其中,第一扫描列表包含检测到触摸信号的驱动电极以及每一个检测到触摸信号的驱动电极在N个驱动电极中相邻的若干个驱动电极,且第一扫描列表中的驱动电极互不重复。
其中,对于每一个检测到触摸信号的驱动电极,其在N个驱动电极中相邻的若干个驱动电极为靠近其的若干个驱动电极,可以包括其左侧相邻的若干个驱动电极(如左侧相邻的一个或连续多个驱动电极)和/或右侧相邻的若干个驱动电极(如右侧相邻的一个或连续多个驱动电极)。
步骤D:根据第一扫描列表从N个驱动电极中等间隔的若干个驱动电极中选择驱动电极,以建立第二扫描列表;其中,第二扫描列表中的驱动电极与第一扫描列表中的驱动电极互不重复。
步骤E:将第一扫描列表和第二扫描列表中的驱动电极作为待扫描电极。
即,该第一扫描列表和第二扫描列表中的驱动电极作为第(K+X)帧扫描采用的驱动电极,在进行第(K+X)帧扫描时,向确定采用的驱动电极依次发送驱动信号,并通过接收电极的信号确定触摸信息。
步骤F:当执行第(K+X)帧扫描时,向待扫描电极输入驱动信号。
其中,X为预设值。
本申请实施例提供的互容式电容屏的扫描控制方法,利用第K帧扫描的扫描结果确定之后的第(K+X)帧扫描的扫描方式,若第K帧扫描未检测到触摸信号,则(K+X)帧扫描采用等间隔的若干个驱动电极,若第K帧扫描检测到触摸信号,则根据触摸的发生位置确定(K+X)帧扫描选择采用的驱动电极。这样不但可以提高扫描帧率,还可以具有较好的触摸精度。
在本申请中,利用第K帧扫描的扫描结果确定在此之后的第(K+X)帧扫描的扫描方式,由于该过程需要一定的计算处理时间,可以在触摸屏执行第(K+X-1)帧扫描时(即在执行第(K+X)帧的上一帧扫描时),执行步骤A~步骤E(即确定第(K+X)帧扫描的扫描方式的过程)。
在本申请实施例中,X可以为任意整数。例如,X可以为2、3、4、5等,其中,X允许的最大值可由每帧扫描的耗时确定。可选地,为了具有更好的触摸流畅性,X的值为2(在此情况下,在触摸屏执行第K帧扫描时,利用上述的步骤A~步骤D确定第(K+2)帧扫描的扫描方式)。例如,可以利用第1帧扫描的扫描结果确定第3帧扫描的扫描方式,利用第2帧扫描的扫描结果确定第4帧扫描的扫描方式,利用第3帧扫描的扫描结果确定第5帧扫描的扫描方式……。
例如,在一实施例中,上述N个驱动电极中等间隔的若干个驱动电极为N个驱动电极中等间隔的L个驱动电极,第二扫描列表中的驱动电极的数量与第一扫描列表中的驱动电极的数量之和为L,L为预设值。
在本申请实施例中,L为触摸屏的N个驱动电极中允许等间隔设置的驱动电极的数量。例如,若该间隔为1个驱动电极,则L为不大于N/2的最大整数,若该间隔为2 个驱动电极,则L为不大于N/3的最大整数,若该间隔为4个驱动电极,则L为不大于N/4的最大整数……。即,本申请中,在执行第(K+X)帧扫描时,采用的驱动电极的数量不大于N/2,这样消耗的扫描时间不会长于现有技术需要的扫描时间的一半,从而可以大大提高扫描帧率,并且还可以具有较好的触摸识别精度。
在本申请实施例中,触摸屏的第一帧扫描(即触摸屏启动后的第一帧扫描)和第二帧扫描(即触摸屏启动后的第二帧扫描)采用的驱动电极均为上述N个驱动电极中等间隔的若干个驱动电极(如L个驱动电极)。
在一实施例中,在触摸屏开启后,每一帧扫描采用的驱动电极的数量均为L(即触摸屏每一帧扫描的耗时相同)。
在本申请实施例的步骤C中,第(K+X)帧扫描的第一扫描列表包含在第K帧扫描中检测到触摸信号的驱动电极以及每一个检测到触摸信号的驱动电极在该N个驱动电极中相邻的若干个驱动电极。其中,对于每一个检测到触摸信号的驱动电极,选择相邻的驱动电极的数量可以是固定值,并且可以在左侧以及右侧分别取相同数量的驱动电极。
例如,选择相邻的驱动电极的数量可以是2个(即左侧和右侧各取一个相邻的驱动电极)或者4个(即左侧和右侧各取两个相邻的驱动电极)。
例如,对于图1中的示例,在第K帧扫描中检测到触摸信号的驱动电极仅包含第i(即线序为i)个驱动电极T(i),则其相邻的驱动电极包括第(i-1)个驱动电极T(i-1)和第(i+1)个驱动电极T(i+1)。又或者包括第(i-2)个驱动电极T(i-2)、第(i-1)个驱动电极T(i-1)、第(i+1)个驱动电极T(i+1)和第(i+2)个驱动电极T(i+2)。
此外,需要说明的是,在本申请实施例中,对于处于边缘位置的驱动电极,其边缘侧相邻的驱动电极的数量可能存在不足。对于此种情况,驱动电极在边缘侧相邻的驱动电极可以仅包含实际数量的驱动电极。例如,对于第2个驱动电极R(2),其左侧仅存在一个相邻的驱动电极R(1)。又例如,若步骤C中选择相邻的驱动电极的数量是4个(即左侧和右侧各取两个相邻的驱动电极),则对该第2个驱动电极R(2),选择的相邻的驱动电极可以仅包括R(1)、R(3)和R(4)共3个驱动电极。
可选地,在一实施例中,可以根据第K帧扫描中检测到触摸信号的驱动电极的数量调节选取的相邻的驱动电极的数量。
例如,在在一实施例的步骤C中,每一个检测到触摸信号的驱动电极在N个驱动电极中相邻的若干个驱动电极的确定方法包括:
利用在第K帧扫描中检测到触摸信号的驱动电极的数量查找预设的相邻电极选择值Z;
对于每一个检测到触摸信号的驱动电极,其在N个驱动电极中相邻的若干个驱动电极为其在N个驱动电极中相邻的Z个驱动电极,Z为预设的正整数。
例如,在一实施例中,上述的Z为2的倍数。相邻的Z个驱动电极包括左侧相邻的Z/2个驱动电极以及右侧相邻的Z/2个驱动电极。
例如,在一实施例中,可以利用在第K帧扫描中检测到触摸信号的驱动电极的数量在预存储的对应关系表中查找相邻电极选择值Z。其中,在该对应关系表中,第K帧扫描中检测到触摸信号的驱动电极的数量越大,则相邻电极选择值Z的取值越小。即,在已识别的触摸位置较少的情况下,通过较大的Z可以进一步提高触摸位置的识别精度,在已识别的触摸位置较多的情况下,通过较少的Z可以满足更多触摸位置的进一步识别。
例如,在一实施例中,上述的对应关系表中可以包含以下对应关系的至少一个:
若在第K帧扫描中检测到触摸信号的驱动电极的数量为1,则相邻电极选择值Z为14;
若在第K帧扫描中检测到触摸信号的驱动电极的数量为2,则相邻电极选择值Z为12;
若在第K帧扫描中检测到触摸信号的驱动电极的数量为3,则相邻电极选择值Z为10;
若在第K帧扫描中检测到触摸信号的驱动电极的数量为4,则相邻电极选择值Z为8;
若在第K帧扫描中检测到触摸信号的驱动电极的数量为5,则相邻电极选择值Z为6;
若在第K帧扫描中检测到触摸信号的驱动电极的数量为6,则相邻电极选择值Z为4;
若在第K帧扫描中检测到触摸信号的驱动电极的数量大于等于7,则相邻电极选择值Z为2。
在本申请实施例中,第(K+X)帧扫描采用的驱动电极的数量仍为L个,即在步骤C中建立第(K+X)帧扫描的第一扫描列表后,第(K+X)帧扫描的第二扫描列表中的驱动电极的数量为L减去第一扫描列表中驱动电极的数量,第二扫描列表中的驱动电极可以从上述等间隔的L个驱动电极中选取,且与第一扫描列表中的驱动电极互不重复。
在本申请实施例中,第(K+X)帧扫描的第一扫描列表和第二扫描列表即为第(K+X)帧扫描采用的所有驱动电极,在执行第(K+X)帧扫描时,可以先依次向第一扫描列表中的驱动电极输入驱动信号,之后再依次向第二扫描列表中的驱动电极输入驱动信号。
可选地,在一实施例的步骤D中,还可以根据第(K+X-1)帧扫描的情况确定第(K+X)帧扫描的第二扫描列表。即,确定第(K+X)帧扫描的第二扫描列表,优先选取上述等间隔的L个驱动电极中第(K+X-1)帧扫描中未采用的驱动电极,这样可以避免触摸屏一些区域较长时间不被检测。例如,在一实施例的步骤D中,建立第(K+X)帧扫描的第二扫描列表包括下述步骤D1至D6:
步骤D1:获取第(K+X-1)帧扫描中最后扫描的驱动电极;
步骤D2:查找最后扫描的驱动电极在预设电极排序中的下一个驱动电极,预设电极排序为对等间隔的L个驱动电极的排序(例如,该排序为线序从小到大的循环排序。示例性地,当排序到最大的线序时,再重新从最小的线序开始排序);
步骤D3:将步骤D2查找到的驱动电极作为当前判断对象执行步骤D4;
步骤D4:判断当前判断对象是否在第一扫描列表中,若是,则舍弃当前判断对象并执行步骤D5,若否,执行步骤D6;
步骤D5:更新当前判断对象为预设电极排序中的下一个驱动电极,并重复执行步骤D4;
步骤D6:将当前判断对象加入第二扫描列表中,之后判断第二扫描列表中的驱动电极的数量与第一扫描列表中的驱动电极的数量之和是否为L,若是,第二扫描列表建立结束,若否,执行步骤D5。
以图1中的结构进行举例说明,触摸屏包括多个驱动电极T(1)~T(N),N为2的倍数,在本实施例中采用二分法全屏扫描,即L为N/2,每帧扫描只需要扫描N/2个驱动电极,具体过程如下:
1、在触摸屏启动后的第一帧扫描和第二帧扫描采用的驱动电极均为T(1)、T(3)、T(5)、…、T(N-1),共N/2个驱动电极;
2、从第三帧扫描开始,每一帧扫描的扫描方式的确定方式如下:
步骤S1:判断第K帧扫描是否检测到触摸信号,若否,执行步骤S2,若是,执行步骤S3,K为任意正整数;
示例性地,当用户触摸触摸屏时,触摸点附近的电容感测节点发生变化,即当对某一驱动电极输入驱动信号时,一个或多个接收电极的接收电极的接收值突然变低,则确定检测到触摸信号,则可以认为可能存在触摸事件。
步骤S2:确定第(K+2)帧扫描采用的驱动电极为T(1)、T(3)、T(5)、…、T(N-1)。
也就是说,当执行第(K+2)帧扫描时,需要向T(1)、T(3)、T(5)、…、T(N-1)输入驱动信号。
即若第K帧扫描没有检测到触摸信号,第(K+2)帧扫描的扫描线序固定,且为间隔扫描,扫描时间为现有技术的一半。
步骤S3:根据在第K帧扫描中检测到触摸信号的驱动电极建立第(K+2)帧扫描的第一扫描列表,之后执行步骤S4。其中,第一扫描列表可以包含检测到触摸信号的驱动电极以及每一个检测到触摸信号的驱动电极在N个驱动电极中相邻的8个驱动电极(左侧和右侧各选取4个),且第一扫描列表中的驱动电极互不重复,通过该第一扫描列表可以进一步得到触摸点的准确位置。
步骤S4:根据第(K+2)帧扫描的第一扫描列表从T(1)、T(3)、T(5)、…、T(N-1)中选择若干个驱动电极,以建立第(K+2)帧扫描的第二扫描列表。其中,第二扫描列表中的驱动电极的数量与第一扫描列表中的驱动电极的数量之和为N/2,且第二扫描列表中的驱动电极与第一扫描列表中的驱动电极互不重复,通过该第二扫描列表可以检测新的触摸点。
当执行第(K+2)帧扫描时,向第一扫描列表和第二扫描列表中的驱动电极输入驱动信号。
例如,N=128,则每一帧需要扫描的驱动电极的数量为64个,若第K帧扫描中检测到触摸信号的驱动电极为T(7),则第(K+2)帧扫描的第一扫描列表包括T(3)、T(4)、T(5)、T(6)、T(7)、T(8)、T(9)、T(10)、T(11)共9个驱动电极,这样第二扫描列表需要包含64-9=55个驱动电极,可以从T(1)、T(3)、T(5)、…、T(127)中选择,用于发现新的触摸点,第二扫描列表可以包含T(13)、T(15)、T(17)、T(19)、T(21)、…、T(121)共55个驱动电极;
在本申请中,若第K帧扫描检测到触摸信号,则第(K+X)帧扫描需要采用的驱动电极包含第一扫描列表和第二扫描列表中的驱动电极。第一扫描列表由第K帧扫描得到的坐标点(触摸点)计算生成,其中驱动电极的数量由第K帧扫描中检测到触摸信号的驱动电极的数量决定(每一个检测到触摸信号的驱动电极可以认为是一个必扫区域)。第二扫描列表中的驱动电极从N个驱动电极中等间隔的L个驱动电极中选取,其中驱动电极的数量由第一扫描列表中的驱动电极的数量决定,且第二扫描列表中的驱动电极与第一扫描列表互不重复。例如,以N/2=64举例,若第K帧扫描中检测到触摸信号的驱动电极的数量为2,对于每一个驱动电极,选取8个相邻的驱动电极,在相邻的驱动电极不重复的情况下,则第二扫描列表中的驱动电极的数量为64-9*2=46个。
本申请实施例提供的触摸屏的扫描控制方法,通过跟踪扫描的方式调整之后扫描的驱动电极,仅需要扫描触摸屏中一半(二分法)或四分之一(四分法)的驱动电极,即可以实现对整个触摸屏的触摸检测,还能够将扫描时间缩短为一半(或四分之一)。因此,不但可以快速提高触摸屏的帧率,提高触摸响应度,而且可以具有较好的触摸曲线识别精准度。
本申请实施例还提供了一种互容式电容屏的扫描控制装置,互容式电容屏包含N个驱动电极,N为正整数。参见图3,图3是本申请实施例提供的一种互容式电容屏的扫描控制装置的结构示意图,装置300包括:
判断模块310,用于判断第K帧扫描是否检测到触摸信号,K为任意正整数;
第一处理模块320,用于若判断第K帧扫描未检测到触摸信号,则将N个驱动电极中等间隔的若干个驱动电极作为待扫描电极,其中,等间隔为至少间隔一个驱动电极;
第二处理模块330,用于若判断第K帧扫描检测到触摸信号,则根据在第K帧扫描中检测到触摸信号的驱动电极建立第一扫描列表;其中,第一扫描列表包含检测到触摸信号的驱动电极以及每一个检测到触摸信号的驱动电极在N个驱动电极中相邻的若干个驱动电极,且第一扫描列表中的驱动电极互不重复;
第三处理模块340,用于根据第一扫描列表从N个驱动电极中等间隔的若干个驱动电极中选择驱动电极,以建立第二扫描列表,以及将第一扫描列表和第二扫描列表中的驱动电极作为待扫描电极;其中,第二扫描列表中的驱动电极与第一扫描列表中的驱动电极互不重复;
扫描模块350,用于当执行第(K+X)帧扫描时,向待扫描电极输入驱动信号;
其中,X为预设值。
本申请实施例提供的互容式电容屏的扫描控制装置,利用第K帧扫描的扫描结果确定之后的第(K+X)帧扫描的扫描方式,若第K帧扫描未检测到触摸信号,则(K+X)帧扫描采用等间隔的L个驱动电极,若第K帧扫描检测到触摸信号,则根据触摸的发生位置确定(K+X)帧扫描选择采用的驱动电极,且采用的驱动电极的数量仍为L个,这样不但可以提高扫描帧率,同时还可以具有较好的触摸精度。
在一些实施例中,第二处理模块330包括:
数值确定单元,用于利用在第K帧扫描中检测到触摸信号的驱动电极的数量查找预设的相邻电极选择值Z;
确定单元,用于对于每一个检测到触摸信号的驱动电极,将其在N个驱动电极中相邻的若干个驱动电极确定为其在N个驱动电极中相邻的Z个驱动电极,Z为预设的正整数。
在一些实施例中,Z为2的倍数,相邻的Z个驱动电极包括左侧相邻的Z/2个驱动电极以及右侧相邻的Z/2个驱动电极。
在一些实施例中,数值确定单元具体用于:利用在第K帧扫描中检测到触摸信号的驱动电极的数量在预存储的对应关系表中查找相邻电极选择值Z,其中,在对应关系表中,第K帧扫描中检测到触摸信号的驱动电极的数量越大,相邻电极选择值Z的取值越小。
在一些实施例中,N个驱动电极中等间隔的若干个驱动电极为N个驱动电极中等间隔的L个驱动电极,第二扫描列表中的驱动电极的数量与第一扫描列表中的驱动电极的数量之和为L,L为预设值。
在一些实施例中,第三处理模块340,包括:
第一获取单元,用于获取第(K+X-1)帧扫描中最后扫描的驱动电极;
第一处理单元,用于查找最后扫描的驱动电极在预设电极排序中的下一个驱动电极,预设电极排序为对等间隔的L个驱动电极的排序;
第二处理单元,用于将查找到的驱动电极作为当前判断对象;
第一判断单元,用于判断当前判断对象是否在第一扫描列表中;
第三处理单元,用于若当前判断对象在第一扫描列表中,则舍弃当前判断对象,并更新当前判断对象为预设电极排序中的下一个驱动电极,然后判断当前判断对象是否在第一扫描列表中;
第四处理单元,用于若当前判断对象不在第一扫描列表中,则将当前判断对象加入第二扫描列表中,之后判断第二扫描列表中的驱动电极的数量与第一扫描列表中的驱动电极的数量之和是否为L,若是,第二扫描列表建立结束,若否,则更新当前判断对象为预设电极排序中的下一个驱动电极,然后判断当前判断对象是否在第一扫描列表中。
在一些实施例中,互容式电容屏的扫描控制装置在执行第(K+X-1)帧扫描时,执行判断第K帧扫描是否检测到触摸信号。
在一些实施例中,触摸屏启动后的第一帧扫描和/或第二帧扫描采用的驱动电极均为N个驱动电极中等间隔的若干个驱动电极。
本申请实施例还提供了一种互容式电容屏的扫描控制装置,互容式电容屏包含N个驱动电极,N为正整数,装置包括处理器以及与处理器耦合的存储器,其中,处理器用于执行存储器中的指令,实现根据本申请第一方面的互容式电容屏的扫描控制方法。
本申请实施例还提供了一种互容式电容屏,包括上述的任一扫描控制装置。
本领域的技术人员能够理解的是,在不冲突的前提下,上述各实施方案可以自由地组合、叠加。
附图中的流程图和框图图示了根据本申请的各种实施例的可能实现方式的体系结构、功能、和操作。在这点上,流程图或框图中的每个方框可代表一模块、片段或代码的一部分,所述模块、片段或代码的一部分包括用于实现(一个或多个)指定的逻辑功能的一个或多个可执行指令。框图和/或流程图中的每个方框、以及框图和/或流程图中的方框的组合,可以由执行指定的功能或动作的专用的基于硬件的系统来实现,或者可以由专用硬件和计算机指令的组合来实现。
应当理解,上述的实施方式仅是示例性的,而非限制性的,在不偏离本申请的基本原理的情况下,本领域的技术人员可以针对上述细节做出的各种明显的或等同的修改或替换,都将包含于本申请的权利要求范围内。

Claims (11)

  1. 一种互容式电容屏的扫描控制方法,所述互容式电容屏包含N个驱动电极,N为正整数,所述方法包括:
    判断第K帧扫描是否检测到触摸信号,K为任意正整数;
    若否,则将所述N个驱动电极中等间隔的若干个驱动电极作为待扫描电极,其中,所述等间隔为至少间隔一个驱动电极;
    若是,则根据在所述第K帧扫描中检测到触摸信号的驱动电极建立第一扫描列表;其中,所述第一扫描列表包含所述检测到触摸信号的驱动电极以及每一个所述检测到触摸信号的驱动电极在所述N个驱动电极中相邻的若干个驱动电极,且所述第一扫描列表中的驱动电极互不重复;
    根据所述第一扫描列表从所述N个驱动电极中等间隔的若干个驱动电极中选择驱动电极,以建立第二扫描列表;其中,所述第二扫描列表中的驱动电极与所述第一扫描列表中的驱动电极互不重复;
    将所述第一扫描列表和所述第二扫描列表中的驱动电极作为待扫描电极;
    当执行第(K+X)帧扫描时,向所述待扫描电极输入驱动信号;
    其中,X为预设值。
  2. 根据权利要求1所述的方法,其中,所述相邻的若干个驱动电极利用以下方法得到:
    利用在所述第K帧扫描中检测到触摸信号的驱动电极的数量查找预设的相邻电极选择值Z;
    对于每一个所述检测到触摸信号的驱动电极,将其在所述N个驱动电极中相邻的若干个驱动电极确定为其在所述N个驱动电极中相邻的Z个驱动电极,Z为预设的正整数。
  3. 根据权利要求2所述的方法,其中,Z为2的倍数,所述相邻的Z个驱动电极包括左侧相邻的Z/2个驱动电极以及右侧相邻的Z/2个驱动电极。
  4. 根据权利要求2所述的方法,其中,所述利用在所述第K帧扫描中检测到触摸信号的驱动电极的数量查找预设的相邻电极选择值Z,包括:
    利用在所述第K帧扫描中检测到触摸信号的驱动电极的数量在预存储的对应关系表中查找相邻电极选择值Z,其中,在所述对应关系表中,所述第K帧扫描中检测到触摸信号的驱动电极的数量越大,所述相邻电极选择值Z的取值越小。
  5. 根据权利要求1所述的方法,其中,所述N个驱动电极中等间隔的若干个驱动电极为所述N个驱动电极中等间隔的L个驱动电极,所述第二扫描列表中的驱动电极的数量与所述第一扫描列表中的驱动电极的数量之和为L,L为预设值。
  6. 根据权利要求5所述的方法,其中,所述建立第二扫描列表包括:
    获取第(K+X-1)帧扫描中最后扫描的驱动电极;
    查找所述最后扫描的驱动电极在预设电极排序中的下一个驱动电极,所述预设电极排序为对所述等间隔的L个驱动电极的排序;
    将所述查找到的驱动电极确定为当前判断对象;
    判断当前判断对象是否在所述第一扫描列表中;
    若当前判断对象在所述第一扫描列表中,则舍弃当前判断对象,并更新当前判断对象为所述预设电极排序中的下一个驱动电极,然后判断当前判断对象是否在所述第一扫描列表中;
    若当前判断对象不在所述第一扫描列表中,则将当前判断对象加入所述第二扫描列表中,之后判断所述第二扫描列表中的驱动电极的数量与所述第一扫描列表中的驱动电极的数量之和是否为L,若是,所述第二扫描列表建立结束,若否,则更新当前判断对象为所述预设电极排序中的下一个驱动电极,然后判断当前判断对象是否在所述第一扫描列表中。
  7. 根据权利要求1-6任一项所述的方法,其中,在执行第(K+X-1)帧扫描时,执行所述判断第K帧扫描是否检测到触摸信号。
  8. 根据权利要求1-6任一项所述的方法,其中,所述触摸屏启动后的第一帧扫描和/或第二帧扫描采用的驱动电极均为所述N个驱动电极中等间隔的若干个驱动电极。
  9. 一种互容式电容屏的扫描控制装置,所述互容式电容屏包含N个驱动电极,N为正整数,所述装置包括:
    判断模块,用于判断第K帧扫描是否检测到触摸信号,K为任意正整数;
    第一处理模块,用于若判断第K帧扫描未检测到触摸信号,则将所述N个驱动电极中等间隔的若干个驱动电极作为待扫描电极,其中,所述等间隔为至少间隔一个驱动电极;
    第二处理模块,用于若判断第K帧扫描检测到触摸信号,则根据在所述第K帧扫描中检测到触摸信号的驱动电极建立第一扫描列表;其中,所述第一扫描列表包含所述检测到触摸信号的驱动电极以及每一个所述检测到触摸信号的驱动电极在所述N个驱动电极中相邻的若干个驱动电极,且所述第一扫描列表中的驱动电极互不重复;
    第三处理模块,用于根据所述第一扫描列表从所述N个驱动电极中等间隔的若干个驱动电极中选择驱动电极,以建立第二扫描列表,以及将所述第一扫描列表和所述第二扫描列表中的驱动电极作为待扫描电极;其中,所述第二扫描列表中的驱动电极与所述第一扫描列表中的驱动电极互不重复;
    扫描模块,用于当执行第(K+X)帧扫描时,向所述待扫描电极输入驱动信号;
    其中,X为预设值。
  10. 一种互容式电容屏的扫描控制装置,所述互容式电容屏包含N个驱动电极,N为正整数,所述装置包括处理器以及与所述处理器耦合的存储器,其中,所述处理器用于执行存储器中的指令,实现权利要求1-8任一项所述的方法。
  11. 一种互容式电容屏,包括权利要求9或10所述的扫描控制装置。
PCT/CN2020/105852 2020-05-29 2020-07-30 互容式电容屏的扫描控制方法及装置、互容式电容屏 WO2021237933A1 (zh)

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