TWI824723B - Finger tracking correction method, electronic chip and information processing device - Google Patents

Abstract

The present invention mainly discloses a finger tracking correction method, which is applied in an electronic device with a touch device and is executed by a touch chip or a TDDI chip of the electronic device. When applying the finger tracking correction method of the present invention, the touch chip or the TDDI chip performs: during the finger drawing process, it detects whether the finger number corresponding to each drawing line is correct; and when the finger number is incorrect, Perform a finger number correction operation. Therefore, when the finger tracking correction method of the present invention is applied, the touch chip or the TDDI chip can real-time correct the position of each finger of the touch device when multiple fingers are drawing lines on the screen of the electronic device. tracking, thereby avoiding the phenomenon of multiple drawing lines displayed on the screen crossing each other due to finger tracking errors when multiple fingers draw lines at the same time.

Description

Finger tracking correction method, electronic chip and information processing device

The present invention relates to the technical field of touch circuits, and in particular, to a finger tracking correction method integrated in a touch device.

It is known that touch devices have been widely used in various electronic devices. Generally, a touch device includes a touch chip and a touch panel including a plurality of touch sensors. In recent years, with the maturity of in-cell touch panel technology, touch display modules integrating touch panels and display panels have become mainstream applications. At the same time, IC design factories have also launched touch and display driver integration (TDDI) chips that have both touch and display driver functions. As a human-computer interface, a touch device can sense the change in the (capacitance) sensing value of the touch sensor caused by a finger (or stylus) touching the screen, thereby calculating a touch position of the finger on the screen. . FIG. 1 shows a block diagram of an electronic device including a conventional touch device. It can be seen from FIG. 1 that the electronic device 1a includes a touch device 11a and a processor 12a, and the touch device 11a includes a touch panel 111a and an electronic chip 112a for performing touch sensing control.

It is worth mentioning that in some special application environments, the user will use multiple fingers to draw lines on the screen of the electronic device 1a, so that multiple lines are displayed on the screen. At this time, the touch device 11a must track the position of the fingers in real time when multiple fingers draw lines at the same time to ensure that multiple lines are correctly reported. It should be added that "reporting" refers to uploading the relevant touch sensing data of multiple drawn lines to the processor 12a of the electronic device 1a. Specifically, as shown in FIG. 1 , a finger tracking algorithm is integrated into the electronic chip 112a of the touch device 11a to serve as a finger tracking unit 113a. When tracking multiple fingers, the finger tracking unit 113a assigns a number to each finger to track the position of the fingers in real time, so that the touch device 11a can correctly report multiple drawn lines.

However, practical experience points out that when the multiple drawing lines are not pure straight lines, the finger tracking unit 113a is prone to misallocation of finger numbers, causing the multiple drawing lines displayed on the screen of the electronic device 1a to appear mutually exclusive. Crossover situation. For example, Figure 2 shows that two lines drawn by two fingers on the screen cross each other. For another example, Figure 3 shows that three lines drawn by three fingers on the screen intersect with each other.

It can be seen from the above description that a finger tracking correction method is urgently needed in this field.

The main purpose of the present invention is to provide a finger tracking correction method, which is applied in an electronic device with a touch device and is executed by a touch chip or a TDDI chip of the electronic device to track multiple fingers. When drawing lines on the screen of the electronic device, the touch device's tracking of each finger is corrected in real time to avoid crossing lines due to finger tracking errors when multiple fingers draw lines at the same time.

To achieve the above object, the present invention proposes an embodiment of the finger tracking correction method, which is applied to an electronic device with a touch function and is executed by an electronic chip of the electronic device; the finger tracking correction method Methods include: Receive a previous frame of touch sensing data and a current frame of touch sensing data, wherein the previous frame of touch sensing data includes a plurality of previous frame touch position data, and the current frame of touch sensing data includes a plurality of current frames. Touch position data, each of the previous frame touch position data has a finger number, and each of the current frame touch position data also has a finger number; Pair the current frame touch position data and the previous frame touch position data with the same finger number and draw them into a line segment, so that after completing a plurality of the current frame touch position data and a plurality of the previous frame After pairing the touch location data, draw multiple line segments; Perform a line segment intersection detection operation to confirm whether there is a line segment intersection among the plurality of line segments; and In the case where line segments intersect, a finger number correction operation is performed on the plurality of current frame touch position data and the plurality of previous frame touch position data.

In one embodiment, the line segment intersection detection operation includes the following steps: Select a line segment from the plurality of line segments and confirm whether the two endpoints of the line segment are simultaneously on the same side of another line segment among the plurality of line segments; and Repeat the above steps until all line segments have completed line segment intersection detection.

In one embodiment, the finger number correction operation includes the following steps: Perform a first grouping operation on the plurality of current frame touch position data and the plurality of previous frame touch position data, thereby separating a first data group and a second data group; Perform at least one second grouping operation on the first data group, thereby pairing at least one of the current frame touch position data and at least one of the previous frame touch position data with each other, and causing the paired current frame data to touch each other. The position data and the touch position data of the previous frame have the same finger number; and Perform the second grouping operation at least once on the second data group, thereby pairing at least one of the current frame touch position data and at least one of the previous frame touch position data with each other, and making the current frame data paired with each other The touch position data of the frame and the touch position data of the previous frame have the same finger number.

In one embodiment, the first grouping operation includes the following steps: The touch position data of the current frame or the touch position data of the previous frame whose positions are the bottom and leftmost are used as a scanning reference point; Calculate the vector angle between the scanning reference point and other touch position data of the current frame and other touch position data of the previous frame; According to the size of each vector angle, scan the corresponding touch position data of the current frame and the touch position data of the previous frame; When the touch position data of the current frame and the touch position data of the previous frame obtained by scanning have the same amount, stop scanning; and The touch position data of the current frame and the touch position data of the previous frame obtained by scanning are classified into the first data group, and the other touch position data of the current frame and the touch position data of the previous frame are classified into the second data group.

In one embodiment, the second grouping operation includes the following steps: The touch position data of the current frame or the touch position data of the previous frame whose positions are the bottom and leftmost are used as a scanning reference point; Calculate the vector angle between the scanning reference point and other touch position data of the current frame and other touch position data of the previous frame; According to the size of each vector angle, scan the corresponding touch position data of the current frame and the touch position data of the previous frame; When the number of the touch position data of the current frame and the touch position data of the previous frame obtained by scanning are both 1, pair the touch position data of the current frame and the touch position data of the previous frame with each other, and Let the current frame touch position data and the previous frame touch position data paired with each other have the same finger number; and Perform the above-mentioned steps on other current frame touch position data and the previous frame touch position data until each current frame touch position data is consistent with the corresponding one of the previous frame touch position data. Data are paired with each other and have the same finger number.

Moreover, the present invention also provides an embodiment of an electronic chip, which is used in an electronic device with a touch function, wherein the electronic chip executes a finger movement when multiple fingers draw lines on the screen of the electronic device. Tracking correction method; the finger tracking correction method includes: Receive a previous frame of touch sensing data and a current frame of touch sensing data, wherein the previous frame of touch sensing data includes a plurality of previous frame touch position data, and the current frame of touch sensing data includes a plurality of current frames. Touch position data, each of the previous frame touch position data has a finger number, and each of the current frame touch position data also has a finger number; Pair the current frame touch position data and the previous frame touch position data with the same finger number and draw them into a line segment, so that after completing a plurality of the current frame touch position data and a plurality of the previous frame After pairing the touch location data, draw multiple line segments; Perform a line segment intersection detection operation to confirm whether there is a line segment intersection among the plurality of line segments; and In the case where line segments intersect, a finger number correction operation is performed on the plurality of current frame touch position data and the plurality of previous frame touch position data.

In one embodiment, the electronic chip is a touch chip or a touch and display driver integration (TDDI) chip.

In one embodiment, the line segment intersection detection operation includes the following steps: Select a line segment from the plurality of line segments and confirm whether the two endpoints of the line segment are simultaneously on the same side of another line segment among the plurality of line segments; and Repeat the above steps until all line segments have completed line segment intersection detection.

In one embodiment, the finger number correction operation includes the following steps: Perform a first grouping operation on the plurality of current frame touch position data and the plurality of previous frame touch position data, thereby separating a first data group and a second data group; Perform at least one second grouping operation on the first data group, thereby pairing at least one of the current frame touch position data and at least one of the previous frame touch position data with each other, and causing the paired current frame data to touch each other. The position data and the touch position data of the previous frame have the same finger number; and Perform the second grouping operation at least once on the second data group, so as to pair at least one of the current frame touch position data and at least one of the previous frame touch position data with each other, and make the current frame data paired with each other The touch position data of the frame and the touch position data of the previous frame have the same finger number.

In one embodiment, the first grouping operation includes the following steps: The touch position data of the current frame or the touch position data of the previous frame whose positions are the bottom and leftmost are used as a scanning reference point; Calculate the vector angle between the scanning reference point and other touch position data of the current frame and other touch position data of the previous frame; According to the size of each vector angle, scan the corresponding touch position data of the current frame and the touch position data of the previous frame; When the touch position data of the current frame and the touch position data of the previous frame obtained by scanning have the same amount, stop scanning; and The touch position data of the current frame and the touch position data of the previous frame obtained by scanning are classified into the first data group, and the other touch position data of the current frame and the touch position data of the previous frame are classified into the second data group.

In one embodiment, the second grouping operation includes the following steps: The touch position data of the current frame or the touch position data of the previous frame whose positions are the bottom and leftmost are used as a scanning reference point; Calculate the vector angle between the scanning reference point and other touch position data of the current frame and other touch position data of the previous frame; According to the size of each vector angle, scan the corresponding touch position data of the current frame and the touch position data of the previous frame; When the number of the touch position data of the current frame and the touch position data of the previous frame obtained by scanning are both 1, pair the touch position data of the current frame and the touch position data of the previous frame with each other, and Let the current frame touch position data and the previous frame touch position data paired with each other have the same finger number; and Perform the above-mentioned steps on other current frame touch position data and the previous frame touch position data until each current frame touch position data is consistent with the corresponding one of the previous frame touch position data. Data are paired with each other and have the same finger number.

Furthermore, the present invention also provides an information processing device, which is characterized by having the electronic chip of the present invention as described above.

In one embodiment, the information processing device is selected from a flat display device, a head-mounted display device, a projection device, a digital camera, a car entertainment system, a smart TV, a smart phone, a smart watch, a tablet computer, An electronic device among the group consisting of desktop computers, notebook computers, all-in-one computers, financial transaction devices, and access control devices.

In order to enable the review committee to further understand the structure, characteristics, purpose, and advantages of the present invention, drawings and detailed descriptions of preferred embodiments are attached below.

FIG. 4 shows a block diagram of an electronic device applying a finger tracking correction method of the present invention. As shown in FIG. 4 , the electronic device 1 has a touch function and includes a touch device 11 and a processor 12 . The touch device 11 includes a touch panel 111 and a processor for performing touch sensing control. The electronic chip 112 is, for example, a touch chip or a touch and display driver integration (TDDI) chip. To explain in more detail, in some special application environments, the user will use multiple fingers to draw lines on the screen of the electronic device 1, so that multiple lines are displayed on the screen. At this time, the touch device 11 must track the position of the fingers in real time when multiple fingers draw lines simultaneously to ensure that multiple lines are correctly reported. It should be added that "reporting" refers to uploading the relevant touch sensing data of multiple drawn lines to the processor 12 of the electronic device 1 . Specifically, as shown in FIG. 4 , a finger tracking algorithm is integrated into the electronic chip 112 of the touch device 11 to serve as a finger tracking unit 113 . When tracking multiple fingers, the finger tracking unit 113 assigns a number to each finger to track the position of the fingers in real time, so that the touch device 11 can correctly report multiple drawn lines.

As shown in FIG. 4 , the finger tracking correction method of the present invention is also integrated into the electronic chip 112 to serve as a finger tracking correction unit 114 . The finger tracking correction method of the present invention is executed by the electronic chip 112 to correct the tracking of each finger by the touch device 11 in real time when multiple fingers draw lines on the screen of the electronic device 1, thereby avoiding the need for multiple fingers to draw lines on the screen of the electronic device 1. When fingers draw lines at the same time, the lines may cross due to finger tracking errors.

FIG. 5 shows a flow chart of the finger tracking correction method of the present invention. As shown in FIG. 5 , after the finger tracking correction method of the present invention is enabled, step S1 is first performed: receiving a previous frame of touch sensing data and a current frame of touch sensing data. Wherein, the touch sensing data of the previous frame includes a plurality of touch position data of the previous frame, the touch sensing data of the current frame includes a plurality of touch position data of the current frame, and each of the touch position data of the previous frame has a finger number. , and each of the current frame touch position data also has a finger number. The method flow then executes step S2: pair the current frame touch position data and the previous frame touch position data with the same finger number and draw them into a line segment, so as to complete a plurality of the current frame touch position data and After pairing a plurality of touch position data of the previous frame, a plurality of line segments are drawn. For example, FIG. 6A shows the touch position data of the previous frame and the current frame sensed by the touch device 11 when two fingers draw lines on the screen. Moreover, FIG. 6B shows two line segments drawn based on the touch position data of the previous frame and the current frame.

As shown in Figure 5, the method flow then proceeds to step S3: receiving and executing a line segment intersection detection operation to confirm whether there is a line segment intersection among the plurality of line segments. According to the design of the present invention, the line segment intersection detection operation also includes detailed steps S31 and S32. When performing step S31, a line segment is selected from the plurality of line segments, and it is confirmed whether two endpoints of the line segment are simultaneously located on the same side of another line segment among the plurality of line segments. Continuing with step S32, the above steps are repeated until all line segments complete line segment intersection detection. For example, select the left line segment among the two line segments in Figure 6B and confirm that both endpoints of the line segment are on the same side of the right line segment. Next, select the right line segment among the two line segments in Figure 6B and confirm that both endpoints of the line segment are on the same side of the left line segment.

Practical experience points out that when the finger tracking unit 113 incorrectly assigns finger numbers when switching from the previous frame to the current frame, it will cause multiple drawing lines displayed on the screen of the electronic device 1 to cross each other. condition. FIG. 6C shows two line segments drawn based on the touch position data of the previous frame and the current frame. As shown in FIG. 6C , when the finger number assignment is incorrect, that is, the data belonging to finger A is assigned finger number B or the data belonging to finger B is assigned finger number A, the two line segments will cross each other.

As shown in Figure 5, in step S4 of the method of the present invention, if there is a line segment intersection, a finger number correction is performed on the plurality of current frame touch position data and the plurality of previous frame touch position data. operate. According to the design of the present invention, the finger number correction operation includes detailed steps S41 to S43. When performing step S41, the electronic chip 112 performs a first grouping operation on the plurality of current frame touch position data and the plurality of previous frame touch position data, thereby separating a first data group and a second data group. group.

To explain in more detail, the first grouping operation also includes: detailed steps S411 to S415. When performing steps S411 to S412, the touch position data of the current frame or the touch position data of the previous frame whose positions are the bottom and leftmost are first used as a scanning reference point, and then the scanning reference point and The vector angle (or polar angle) between the other touch position data of the current frame and the other touch position data of the previous frame. FIG. 7A shows the touch position data of the previous frame and the current frame sensed by the touch device 11 when four fingers draw lines on the screen. Also, FIG. 7B shows the touch position data of the previous frame and the current frame. As shown in FIG. 7B , the touch point at the bottom and leftmost position is a circular data point, which belongs to the touch position data of the previous frame. Moreover, FIG. 7B also exemplarily illustrates the vector angle between this contact point and other contact points as the scanning reference point.

As shown in Figure 7C, the first grouping operation executes steps S413 to S414, scanning the corresponding touch position data of the current frame and the touch position data of the previous frame according to the size of each vector angle, and scanning When the touch position data of the current frame and the touch position data of the previous frame are obtained in the same amount, scanning is stopped. In Figure 7C, after scanning from small to large vector angles, two current frame touch position data and two previous frame touch position data are obtained. At this time, the current frame touch position data and the previous frame have been matched. When one frame of touch position data has the same amount, scanning stops. Continuing, as shown in FIG. 7D , the first grouping operation then performs step S415 to classify the touch position data of the current frame and the touch position data of the previous frame obtained by scanning into the first data group, And the other touch position data of the current frame and the touch position data of the previous frame are classified into the second data group.

After completing the detailed steps S411 to S415 of step S41, step S42 is then performed to perform at least one second grouping operation on the first data group, thereby combining at least one of the current frame touch position data and at least one of the previous frame The touch position data are paired with each other, and the touch position data of the current frame and the touch position data of the previous frame that are paired with each other have the same finger number. According to the design of the present invention, the second grouping operation further includes: detailed steps S421 to S425. When executing steps S421 to S423, as shown in FIG. 8A , the touch position data of the current frame or the touch position data of the previous frame whose positions are the bottom and leftmost are first used as a scanning reference point, and then the touch position data of the previous frame is calculated. Scan the vector angles between the reference point and other touch position data of the current frame and other touch position data of the previous frame, and then scan the corresponding touch position data of the current frame according to the size of each vector angle. Touch position data with the previous frame.

As shown in FIG. 8B , the second grouping operation system executes step S424. When the number of the current frame touch position data and the previous frame touch position data obtained by scanning are both 1, the current frame touch position data is 1. The touch position data of the frame and the touch position data of the previous frame are paired with each other, and the touch position data of the current frame and the touch position data of the previous frame that are paired with each other have the same finger number. It is worth noting that in Figure 8B, a thick black line is used to connect a circular contact and an frame touch position data) and the circular contact (ie, the previous frame touch position data) have the same finger number, and the finger number correction (or reassignment of the corresponding finger number) is completed.

As shown in FIG. 8C , the second grouping operation executes step S425, and executes steps S421 to S424 (i.e., pairing procedure) as described above for other touch position data of the current frame and touch position data of the previous frame. ), until each of the current frame touch position data is paired with a corresponding one of the previous frame touch position data and has the same finger number. Therefore, in Figure 8C, another thick black line is used to connect a circular contact and an X-shaped contact, indicating that the two contacts are paired with each other, so then the The touch position data) and the circular contact point (ie, the touch position data of the previous frame) have the same finger number, and the finger number correction (or reassignment of the corresponding finger number) is completed.

After completing the detailed steps S421 to S425 of step S42, step S43 is then performed to perform at least one second grouping operation on the second data group, thereby combining at least one of the current frame touch position data and at least one of the previous The touch position data of one frame are paired with each other, and the touch position data of the current frame and the touch position data of the previous frame that are paired with each other have the same finger number. Similarly, when the second grouping operation first performs steps S421 to S423, as shown in FIG. 9A , the touch position data of the current frame or the touch position of the previous frame is first used as the bottom and leftmost position. The data is used as a scanning reference point, and then the vector angle between the scanning reference point and other touch position data of the current frame and other touch position data of the previous frame is calculated, and then according to the size of each vector angle, Scan the corresponding touch position data of the current frame and the touch position data of the previous frame. Continuing, as shown in FIG. 9B , the second grouping operation system executes step S424. When the number of the touch position data of the current frame and the touch position data of the previous frame obtained by scanning are both 1, the The touch position data of the current frame and the touch position data of the previous frame are paired with each other, and the touch position data of the current frame and the touch position data of the previous frame that are paired with each other have the same finger number. It is worth noting that in Figure 9B, a thick black line is used to connect a circular contact and an frame touch position data) and the circular contact (ie, the previous frame touch position data) have the same finger number, and the finger number correction (or reassignment of the corresponding finger number) is completed.

As shown in FIG. 9C , the second grouping operation executes step S425, and executes steps S421 to S424 (i.e., pairing procedure) as described above for other touch position data of the current frame and touch position data of the previous frame. ), until each of the current frame touch position data is paired with a corresponding one of the previous frame touch position data and has the same finger number. Therefore, in Figure 9C, another thick black line is used to connect a circular contact and an X-shaped contact, indicating that the two contacts are paired with each other, so then the The touch position data) and the circular contact point (ie, the touch position data of the previous frame) have the same finger number, and the finger number correction (or reassignment of the corresponding finger number) is completed.

In summary, the present invention discloses a finger tracking correction method, which is applied in an electronic device 1 with a touch device 11 and is executed by an electronic chip 112 of the electronic device 1 . When applying the finger tracking correction method of the present invention, the electronic chip 112 performs: during the finger drawing process, detects whether the finger number corresponding to each drawing line is correct; and if the finger number is incorrect, performs a finger numbering Corrective operation. Therefore, when the finger tracking correction method of the present invention is applied, the electronic chip 112 can correct the tracking of each finger of the touch device in real time when multiple fingers draw lines on the screen of the electronic device 1. This avoids the phenomenon of multiple line drawing trajectories displayed on the screen intersecting with each other due to finger tracking errors when multiple fingers draw lines at the same time. For example, Figure 10 shows that the two trajectories drawn by two fingers on the screen do not cross each other. For another example, Figure 3 shows that the three trajectories drawn by three fingers on the screen do not cross each other. That is to say, the finger tracking correction method of the present invention can solve the problem of trajectory misjudgment of multi-finger line drawing, and is characterized by including the following steps: (1) Reading the first group number of one of the multiple previous frame touch points, and according to A predetermined rule performs a touch point numbering procedure on multiple current frame touch points to obtain a second group of numbers for the current frame touch points; (2) Each of the first group of numbers and the second group of numbers is the same One of the touch points of the previous frame corresponding to the number and one of the touch points of the current frame are connected into a line segment; and (3) when any two of the line segments intersect, perform a process on the touch points of the current frame. A numbering correction operation is performed to update the second set of numbers. In addition, the predetermined rule may be to increase the number from left to right or to increase the number from right to left. For example, assuming there are 5 touch points in total, the 5 touch points can be numbered 1, 2, 3, 4, and 5 from left to right.

In this way, the above has completely and clearly explained the finger tracking correction method of the present invention; and from the above, it can be seen that the present invention has the following advantages:

(1) The present invention discloses a finger tracking correction method, which is applied in an electronic device with a touch device and is executed by a touch chip or a TDDI chip of the electronic device to detect multiple fingers on the When drawing lines on the screen of the electronic device, the touch device's tracking of each finger is corrected in real time, thereby avoiding cross-drawing lines caused by finger tracking errors when multiple fingers draw lines at the same time.

(2) The present invention also provides an electronic chip, which is used in an electronic device with a touch function, wherein the electronic chip executes the above process when a plurality of fingers draw lines on the screen of the electronic device. The invented finger tracking correction method enables the electronic chip to correct the tracking of each finger of the touch device in real time when multiple fingers are drawing lines on the screen of the electronic device, thereby avoiding the need for multiple fingers to draw lines at the same time. In some cases, the finger tracking error causes multiple lines displayed on the screen to cross each other.

(3) Furthermore, the present invention also provides an information processing device, characterized by having the electronic chip of the present invention as described above. In one embodiment, the information processing device is selected from a flat display device, a head-mounted display device, a projection device, a digital camera, a car entertainment system, a smart TV, a smart phone, a smart watch, a tablet computer, An electronic device among the group consisting of desktop computers, notebook computers, all-in-one computers, financial transaction devices, and access control devices.

It must be emphasized that the foregoing disclosed in this case are preferred embodiments. Any partial changes or modifications derived from the technical ideas of this case and easily inferred by those familiar with the art do not deviate from the patent of this case. category of rights.

To sum up, regardless of the purpose, means and effects of this case, it shows that it is completely different from the conventional technology, and that the invention is practical first, and indeed meets the patent requirements for inventions. I sincerely ask the review committee to take a clear look and grant the patent as soon as possible for your benefit. Society is a prayer for the Supreme Being.

1a: Electronic devices 11a:Touch device 111a:Touch panel 112a: Electronic chip 111a:Touch panel 113a: Finger tracking unit 12a: Processor 1: Electronic devices 11:Touch device 111:Touch panel 112: Electronic chip 111:Touch panel 113: Finger tracking unit 114: Finger tracking correction unit 12: Processor element S1: Receive a previous frame of touch sensing data and a current frame of touch sensing data S2: Pair the current frame touch position data and the previous frame touch position data with the same finger number and draw them into a line segment, so that after completing a plurality of the current frame touch position data and a plurality of the previous frame After matching one frame of touch position data, multiple line segments are drawn. S3: Perform a line segment intersection detection operation to confirm whether there is a line segment intersection among the plurality of line segments. S4: In the case where line segments intersect, perform a finger number correction operation on the plurality of touch position data of the current frame and the plurality of touch position data of the previous frame.

Figure 1 is a block diagram of an electronic device including a conventional touch device; Figure 2 is an illustration of two lines drawn on the screen using two fingers; Figure 3 is an illustration of three lines drawn on the screen using three fingers; Figure 4 is a block diagram of an electronic device applying a finger tracking correction method of the present invention; Figure 5 is a flow chart of the finger tracking correction method of the present invention; Figures 6A to 6C are a series of diagrams for explaining steps S1 to S3 shown in Figure 5; Figures 7A to 7D are a first series of diagrams for explaining step S4 shown in Figure 5; Figures 8A to 8C are a second series of diagrams for explaining step S4 shown in Figure 5; Figures 9A to 9C are a third series of diagrams for explaining step S4 shown in Figure 5; Figure 10 is an illustration of two lines drawn on the screen using two fingers; and Figure 11 is an illustration of three lines drawn on the screen using three fingers.

S1: Receive a previous frame of touch sensing data and a current frame of touch sensing data

S2: Pair the current frame touch position data and the previous frame touch position data with the same finger number and draw them into a line segment, so that after completing a plurality of the current frame touch position data and a plurality of the previous frame After matching one frame of touch position data, multiple line segments are drawn.

S3: Perform a line segment intersection detection operation to confirm whether there is a line segment intersection among the plurality of line segments.

S4: In the case where line segments intersect, perform a finger number correction operation on the plurality of touch position data of the current frame and the plurality of touch position data of the previous frame.

Claims (12)

A finger tracking correction method is applied to an electronic device with a touch function and is executed by an electronic chip of the electronic device; the finger tracking correction method includes: receiving a previous frame of touch sensing data and a The current frame touch sensing data, wherein the previous frame touch sensing data includes a plurality of previous frame touch position data, the current frame touch sensing data includes a plurality of current frame touch position data, each of the previous frame touch The position data each has a finger number, and each of the current frame touch position data also has a finger number; the current frame touch position data and the previous frame touch position data with the same finger number are paired and drawn. into a line segment, so that after completing the pairing of a plurality of touch position data of the current frame and a plurality of touch position data of the previous frame, a plurality of line segments are drawn; a line segment intersection detection operation is performed to confirm that the plurality of line segments whether there is a line segment intersection; and if there is a line segment intersection, perform a finger number correction operation on the plurality of current frame touch position data and the plurality of previous frame touch position data. The finger tracking correction method as described in claim 1, wherein the line segment intersection detection operation includes the following steps: select a line segment from the plurality of line segments, and confirm whether the two endpoints of the line segment are located in the plurality of line segments at the same time. on the same side of another line segment; and repeat the above steps until all line segments have completed line segment intersection detection. The finger tracking correction method according to claim 1, wherein the finger number correction operation includes the following steps: performing a first grouping operation on the plurality of current frame touch position data and the plurality of previous frame touch position data, thereby Separate a first data group and a second data group; perform at least one second grouping operation on the first data group, thereby combining at least one of the current frame touch position data and at least one of the previous frame The touch position data are paired with each other, and the current frame touch position data and the previous frame touch position data that are paired with each other have the same finger number; and performing at least one second grouping operation on the second data group , thereby pairing at least one of the current frame touch position data and at least one of the previous frame touch position data with each other, and making the paired current frame touch position data and the previous frame touch position data have the same Finger number. The finger tracking correction method according to claim 3, wherein the first grouping operation includes the following steps: the current frame touch position data or the previous frame touch position data whose position is the bottom and leftmost As a scanning reference point; calculate the vector angle (or polar angle) between the scanning reference point and other touch position data of the current frame and other touch position data of the previous frame; according to each vector angle size, scan the corresponding touch position data of the current frame and the touch position data of the previous frame; in the case where the touch position data of the current frame obtained by scanning and the touch position data of the previous frame have the same number, Stop scanning; and The touch position data of the current frame and the touch position data of the previous frame obtained by scanning are classified into the first data group, and the other touch position data of the current frame and the touch position data of the previous frame are classified into the second data group. The finger tracking correction method according to claim 4, wherein the second grouping operation includes the following steps: the current frame touch position data or the previous frame touch position data whose position is the bottom and leftmost As a scanning reference point; calculate the vector angle between the scanning reference point and other touch position data of the current frame and other touch position data of the previous frame; scan the corresponding The touch position data of the current frame and the touch position data of the previous frame; when the number of the touch position data of the current frame and the touch position data of the previous frame obtained by scanning are both 1, the The current frame touch position data and the previous frame touch position data are paired with each other, and the paired current frame touch position data and the previous frame touch position data have the same finger number; and for other current frame touches The position data and the previous frame touch position data perform the steps as described above until each of the current frame touch position data is paired with the corresponding one of the previous frame touch position data and has the same finger. number. An electronic chip is used in an electronic device with a touch function, wherein the electronic chip performs a finger tracking correction method when a plurality of fingers draw lines on the screen of the electronic device; the finger tracking correction method includes : Receive a previous frame of touch sensing data and a current frame of touch sensing data, wherein the previous frame of touch sensing data includes a plurality of previous frame touch position data, and the current frame of touch sensing data includes a plurality of current frames. Touch position data, each of the previous frame touch position data has a finger number, and each of the current frame touch position data also has a finger number; the current frame touch position data with the same finger number and all The touch position data of the previous frame are paired and drawn into a line segment, so that after completing the pairing of a plurality of touch position data of the current frame and a plurality of touch position data of the previous frame, a plurality of line segments are drawn; executing a line segment Segment intersection detection operation to confirm whether there is a line segment intersection among the plurality of line segments; and if there is a line segment intersection, perform a finger number correction on the plurality of current frame touch position data and the plurality of previous frame touch position data operate. The electronic chip of claim 6, wherein the electronic chip is a touch chip or a touch display driver integrated chip. The electronic chip as described in claim 6, wherein the line segment intersection detection operation includes the following steps: select a line segment from the plurality of line segments, and confirm whether the two endpoints of the line segment are simultaneously located in the plurality of line segments. on the same side of another line segment; and repeat the above steps until all line segments have completed line segment intersection detection. The electronic chip as claimed in claim 6, wherein the finger number correction operation includes the following steps: Perform a first grouping operation on the plurality of current frame touch position data and the plurality of previous frame touch position data, thereby separating a first data group and a second data group; for the first data group Perform at least one second grouping operation to pair at least one of the current frame touch position data and at least one of the previous frame touch position data with each other, and make the paired current frame touch position data and the previous frame The frame touch position data has the same finger number; and performing at least one second grouping operation on the second data group, thereby combining at least one of the current frame touch position data and at least one of the previous frame touch position data. Pair each other, and make the current frame touch position data and the previous frame touch position data paired with each other have the same finger number. The electronic chip according to claim 9, wherein the first grouping operation includes the following steps: the current frame touch position data or the previous frame touch position data with its position as the bottom and leftmost is used as a Scan the reference point; calculate the vector angle (or polar angle) between the scanning reference point and other touch position data of the current frame and other touch position data of the previous frame; according to the size of each vector angle , scan the corresponding touch position data of the current frame and the touch position data of the previous frame; when the touch position data of the current frame obtained by scanning and the touch position data of the previous frame have the same number, stop scanning ;as well as The touch position data of the current frame and the touch position data of the previous frame obtained by scanning are classified into the first data group, and the other touch position data of the current frame and the touch position data of the previous frame are classified into the second data group. The electronic chip according to claim 10, wherein the second grouping operation includes the following steps: the current frame touch position data or the previous frame touch position data with its position as the bottom and leftmost is used as a Scan the reference point; calculate the vector angle between the scanning reference point and the other touch position data of the current frame and the other touch position data of the previous frame; scan the corresponding one according to the size of each vector angle. The touch position data of the current frame and the touch position data of the previous frame; when the number of the touch position data of the current frame and the touch position data of the previous frame obtained by scanning are both 1, the current frame is The touch position data and the touch position data of the previous frame are paired with each other, and the paired touch position data of the current frame and the touch position data of the previous frame have the same finger number; and for other touch position data of the current frame Perform the steps as described above with the previous frame touch position data until each current frame touch position data is paired with a corresponding one of the previous frame touch position data and has the same finger number. An information processing device, characterized by having at least one electronic chip as described in claim 6 to claim 11.